[:.NaLe!T.:]'s NaLe!T\'s CrackMe No#1

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.Net's ReverseMe

Download CE4_ReverseMe.zip, 18 kb (password: crackmes.de)
Browse contents of CE4_ReverseMe.zip

CE4 is a string encryption based on simple math. Reverse the algorithm and decrypt the string!
The software protection is 0.5/10, but the algorithm is hard to break!

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 15. Apr, 2013
Downloads: 184

Rating

Votes: 3
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

tinqnpro 21. Apr 2013	Visual Basic? -.-

0x00786F72's xor_crackme#0

Download xor_crackme0.zip, 3 kb (password: crackmes.de)
Browse contents of xor_crackme0.zip

It's keygenme written on flat assembler and 30% of him code compound macroses:) The special of it is executing some code blocks in invented RISC-processor emulator.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 09. Dec, 2007
Downloads: 599

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by jE!, published 15. dec, 2007; download (16 kb), password: crackmes.de or browse.

jE! has rated this crackme as quite nice.

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Discussion and comments

saitob 09. Dec 2007	What do you want us to do? What is a valid solution?
0x00786F72 Author 09. Dec 2007	Oh, sorry... Valid solution is serial or keygen. Send me it via personal mail.
0x00786F72 Author 12. Dec 2007	Somebody decompiled VM?:)
jE! 12. Dec 2007	while decoding, A. you removed my post B. i found 3 POSSIBLE ERRORs 1) VMproc1 @0040157A Zf flag set NOT by result 2) VMproc5 case1 @004015FE a=b XOR -1; differs from case2 @0040162A; b= b XOR a; 3) VMproc14 @0040186A case1 not ended with RET. i will post it also on forum, you love Dleting ye!?:)
jE! 12. Dec 2007	this faults not affects current execution of VM, so crackme update not needs.
0x00786F72 Author 13. Dec 2007	jE!, i don't delete nothing posts... 2) VMproc5 case1 @004015FE a=b XOR -1; differs from case2 @0040162A; b= b XOR a; Yes, case2 at addr 40162A works wrong. But other enumerating 'possible errors' is not errors;) Several instruction yet can be wrong, cause i don't test all VM, only instruction what i used.

0x00ach's Win32FTW

Download challenge.zip, 30 kb (password: crackmes.de)
Browse contents of challenge.zip

Zip password: "challenge"

The keygenme source code is in the "src.zip" file (password: serial for "S0urceC0de"), please do not leak it ;]

Hints:

InternalW
sysenter
debuggerz

Hope you'll enjoy ;]

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 09. Sep, 2014
Downloads: 219

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Solutions

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Discussion and comments

barun 12. Sep 2014	You forgot to do some error checking. If calc.exe is not present on the system then it will hang for ever.
nadav12456 13. Sep 2014	hi dude, your obsfucation techniques are realy cool, but ain't machine-independent, e.g: it depneds on my ntdll.dll version... so which OS version have u used in your tests? app is crashing all time, when trying access to ntdll.dll+0x1000, which isn't mapped...
barun 14. Sep 2014	This won't run on a AMD processor. Hint: _KUSER_SHARED_DATA, sysenter, syscall
ShihabSoft 17. Sep 2014	the pasword is not working.Wasting time
ShihabSoft 17. Sep 2014	oops sorry.Not noted
barun 18. Sep 2014	Keygenning finished! Name: S0urceC0de Serial: TVqQAFBFAAByjsPV503hQwAA To the author: However note that this is NOT the password of src.zip. I have found out that for the name "S0urceC0de" (or for any name) there are 65,536 possible serials all of which are valid. However only one of them is the correct password for src.zip. Extra Info: This keygenme will only work on Intel processor and only on non ASLR aware systems like Win XP.
0x00ach Author 07. Oct 2014	@nadav12456 : I used a Win XP SP3 x86 version, I should parse the ntdll PE header to find the .text section :]
0x00ach Author 13. Oct 2014	You're all right : it only works on win XP x86 Intel machines... If I got some free time, I'll update it with a AMD and ALSR aware code. (well, it's also part of the challenge... ... ... okay, sorry, my mistake :']). I'll check the serial issue asap !
MacIn 19. Nov 2014	What version of ntdll.dll file you used? On my system (XPSP3) ntdll doesn't have anything reasonable at ndlll+1000+120F, which is used as initial EIP for worker thread. Or is it intentional? I'd like to find the solution very much, it is very interesting crackme indeed, but it seems impossible to complete it if program won't run. Don't want to leave it half-way done.
MacIn 19. Nov 2014	Also, trick with pow doesn't work on XP SP3. In SP2 there's a NOP before it, in SP3 - RETN.
MacIn 20. Nov 2014	Ok, I was wrong about pow, didn't notice off by one offset for this procedure. Also bogus command at 120f doesn't matter because of TF. So it works. Wonderful crackme, very interesting obfuscation technique. But unfortunately I came to same results as barun described: keygened same key for S0urceC0de, and it doesn't match .zip password.
MASOUD 07. Apr 2015	@0x00ach: it seems you don't want to share source code with anyone cause its for long time ago and no news yet.
barun 07. Apr 2015	@Masoud The password of the zip is actually a simple modification of the serial. I have already completed keygenning this long ago, will try upload the solution soon.
MASOUD 12. Apr 2015	@barun: Thanks for your reply. How did you find the correct password? did you brute-force it? btw, Waiting for your solution.

0xf001's oxfoo1me

Download oxfoo1m3.tgz, 1 kb

hack the password!

features: a anti-libbfd, anti-disassembling, anti-debugging, and a bit of obfuscation ;)

have a lot of fun ... ;}

0xf001

Difficulty: 5 - Professional problem to solve
Platform: Unix/linux etc.
Language: Assembler

Published: 20. Apr, 2007
Downloads: 525

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by stefanie, published 26. apr, 2007; download (4 kb), password: crackmes.de or browse.

stefanie has rated this crackme as awesome.

Discussion and comments

yo-mismo 10. Apr 2013	too hard for me, readed solution... Thank you! i solved it with help

Solution by NeO'X'QuiCk, published 02. dec, 2000; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

halsten 05. Dec 2007	You say assembler, but PEiD says the opposite (DevC++). Maybe the tool is wrong or I misunderstood something you wrote, eh?
w00b 05. Dec 2007	absolutely horrible string routines.. hint @ 401F56 :) i'm not familiar with the mingw library though :x
abcd Author 06. Dec 2007	my bad :(....ya it is C++....was in a hurry when i uploaded this.....
w00b 09. Dec 2007	you compiled this with devc++, are you purposely printing characters to the screen 1 by 1 or is that just apart of how devcpp handles things?
abcd Author 09. Dec 2007	@w00b....does it matter neway?? I'm surprised nobody has cracked it still...it was supposed to be an easy one...from a noob...:-)
halsten 09. Dec 2007	abcd: That doesn't mean that no one was unable to crack it. Mostly, everyone was bored with it or not interested.
abcd Author 21. Dec 2007	290 downloads and no solutions...... i implore you people....pleaseeeee submit solutions.....
abcd Author 17. Jan 2008	sorry emery....wrong solution...calls for a bit of registry....
emery 13. Feb 2008	Ah should have read the instructions a bit more carefully ;) Hopefully if I find some time I'll solve it the way as intended. Cheers
john134 19. Mar 2008	Nice, I solved it :) This was my 2nd crackme I ever tried ^^
abcd Author 22. Mar 2008	Awesome work by john134....Kudos!!! (at last.....)

abcd's abcd's battleroyale

Download abcd__s_battle_royale.zip, 22 kb (password: crackmes.de)
Browse contents of abcd__s_battle_royale.zip

The challenge is to exploit vulnerability in the program and display a dialog box. Details in the readme file. This is a tough one for sure!!!

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: .NET

Published: 26. Mar, 2008
Downloads: 497

Rating

Votes: 4
Crackme is good.

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Solutions

Solution by Ox87k, published 04. apr, 2008; download (1793 kb), password: crackmes.de or browse.

Ox87k has rated this crackme as awesome.

Solution by DigitalAcid, published 04. apr, 2008; download (139 kb), password: crackmes.de or browse.

DigitalAcid has rated this crackme as awesome.

Solution by antofik, published 04. apr, 2008; download (26 kb), password: crackmes.de or browse.

antofik has rated this crackme as nothing special.

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Discussion and comments

DigitalAcid 27. Mar 2008	Hmm, your "solution" doesn't work here, because adresses are different. I think we got to exploit the license file (buffer overflow or code injection or something ?).
cosmos 28. Mar 2008	Hmm i need to work more...
DigitalAcid 28. Mar 2008	I managed to inject a messagebox using the license file, but i still get an error after clicking the OK button. I don't know enough to fix it =). Other than that, it works :P.
abcd Author 29. Mar 2008	@DigitalAcid Please submit your solution....you may be right after all... :)
DigitalAcid 29. Mar 2008	Uploaded my tutorial. If my solution is correct, I really liked this crackme :).
Sinok 29. Mar 2008	And if it isn't? :P
DigitalAcid 29. Mar 2008	Then i'm disappointed :P.
TeruS 30. Mar 2008	Own3d=) I'll try to post only license.lic file as a solution :) Would you mind?
ksnrcp 31. Mar 2008	i think i got it : ) serveral jump above msgbox address can jump to check license ,hehehe
Ox87k 31. Mar 2008	very interesting, solved it! I have a valid license file in order to exploit it as you want but i have a problem. I need esp but it change from pc to pc and so i can't memorize it. The only way i know is to create a loader that runs the crackme, after you press Test it grabs the value of esp and with it create a valid license file. @abcd: Can it be a valid solution?
TeruS 31. Mar 2008	Ox87k, look at the IAT, and use it for yur sploit being work on other PC's. All you need is there(if i've unrerstood you properly). Good luck! :)
Ox87k 31. Mar 2008	TeruS, your keyfile doesn't work on my pc infact it crashes when, after retn, you call MessageBoxA (I don't understand why you can exploit it with a retn over messagebox without any parameters!). You have to inject your code in the memory with the license file and not just call the messagebox (moreover without any parameter)
DigitalAcid 31. Mar 2008	Woah, Ox87k that looks great. Mine is crashing all the time after clicking the OK button. I don't think my solution will be right now =). Allthough I can't download TeruS' file, I also exploited a RET to redirect it to my own code. It should only work on my own pc, due to different adressess stuff.
Ox87k 31. Mar 2008	@DigitalAcid: Exactly! ;) But... Why your license crashing after clicking the Ok button?
DigitalAcid 31. Mar 2008	It's because of the RET. I tried adding a jump to make it go back to some original code, but nothing seems to work. @Ox87k: did you use/modify the about box 8-) ?
Ox87k 31. Mar 2008	@DigitalAcid: Read the readme and see the iat (about your error)...! :P I didn't use the about box and i didn't modify anything in the exe, just make all with the license file :)
DigitalAcid 31. Mar 2008	Oh, I didn't see we had to add "Hacked!" as text :s. What is the connection of the IAT and my error O.o ?
Ox87k 31. Mar 2008	Are you sure to have readed the readme.txt? :D Just think about this part: "...the OK button to exit the program"
abcd Author 01. Apr 2008	Just to make some things clear, the exit messagebox must appear like this:- http://www.mediafire.com/imageview.php?quickkey=mhxxid53b4g&thumb=4 And to all those people who have solved it, please submit your tutorials. @Ox87k,your video preview was looking great.
Ox87k 01. Apr 2008	i submit my solution yesterday night ;)
TeruS 01. Apr 2008	Mmm... What i've done? i saw that name was loaded into stack without checking size. so we overwrite the return address of the function to jmp dword ptr [MessageBoxA] and while alling this in the top of stack there must be an address of ExitProcess and after it goparameters of these functions...
DigitalAcid 02. Apr 2008	@: Ox87k, thx for pointing that out :). It works without error now. Weee, finally got a working version now :P. I had problems with my string that got overwritten. After lots of frustration i now learned why it happened =). Only had to add 3 bytes :O.
andrewl.us Moderator 03. Apr 2008	How are you guys viewing submissions before any solutions are approved?
TiGa 04. Apr 2008	Nice to see new people making videos.
DigitalAcid 04. Apr 2008	I asked my nephew to test the crackme on his pc with my (same) license and he said it worked, so please somebody try my file too :). It might have been coincidence.
abcd Author 04. Apr 2008	@ DigitalAcid your solution did not work on my comp :( .... but i think you got the solution later so you can update it.....
TeruS 04. Apr 2008	if i understand correctly, then there can't be universal solution...
TeruS 04. Apr 2008	from all submitted solutions only one by DigitalAcid worked by me...
Ox87k 04. Apr 2008	@DigitalAcid: Your keyfile doesn't work for me too but i don't think it's a problem. I agree with TeruS, i think it's impossible to find a valid universal keyfile. All depend from ESP's value. Maybe in some machine it works good because they can have the same esp of DigitalAcid's solution required but in many other machine isn't it. You can see this difference in my solution, look the video-solution, i tried to show you this crackme over two different machine with the same os.
TeruS 05. Apr 2008	What about me - on VM my keyfile works almost good :) But instead of a good text in a box i recieve some unrecognizeble characters :)
DigitalAcid 06. Apr 2008	@Terus: I had the same problem but without using VM. What i did was subtract a value from esp, as you can see in my tutorial. My string simply got overwritten.
Ox87k 06. Apr 2008	@DigitalAcid: If you don't wan't that your string is overwritten try to copy esp in another register and then subtract it as i did

abcd's abcd's rack_your_brains

Download abcd__s_rack_your_brains.zip, 28 kb (password: crackmes.de)
Browse contents of abcd__s_rack_your_brains.zip

Just get the correct username/password combination....

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: .NET

Published: 03. Apr, 2008
Downloads: 344

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Solutions

Solution by aneasystone, published 10. apr, 2008; download (33 kb), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 04. Apr 2008	Is there any modification needed (patching) to find the right serial ? Or is it a trick or bug ? Ps: no matter what i put in, it does something with my input, then it's doing something (wich is always the same) and not using my input after that.
abcd Author 04. Apr 2008	ok here goes a hint...stress on the word "exception" :P...now you should be able to get it...
CybeRCrasH 05. Apr 2008	e.g. the DivideByZeroException :P

abcd's Li'l crackme

Download crackme2.zip, 128 kb (password: crackmes.de)
Browse contents of crackme2.zip

Simple command prompt crackme

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 28. Nov, 2007
Downloads: 582

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

DigitalAcid 28. Nov 2007	Patching it is easy, are we allowed to do that ? =)
abcd Author 28. Nov 2007	No patching allowed :)
Devoney 02. Dec 2007	What do you mean by assembler language. It looks like this one is not coded with a C compiler or an asm compiler.... In which language is it really created and which compiler is used then?
xylitol 02. Dec 2007	crackMe crash on my computer
Devoney 03. Dec 2007	At one point I am in a loop. It checks the following lines for a byte 2C hex. 0022FD40 \|7C90EE00 ntdll.7C90EE00 0022FD44 \|7C96E0F8 ntdll.7C96E0F8 It looks like there are ntdll function stored at these memory adresses. What is the point of that to be checking that for 2C in hex? When one of those bytes is not 2C hex the next line is skipped: 00401695 . C745 E0 010000>MOV DWORD PTR SS:[EBP-20],1 and when this line is skipped the following line jumps over the goodboy message, exiting the program. 004016DB . 837D E0 00 CMP DWORD PTR SS:[EBP-20],0 004016DF 0F85 C0030000 JNZ crackme2.00401AA5 I can only make one thing out of this, that is that a ntdll function in the version of my dll files needs to contain a byte 2chex at its function calling address. Is this supposed to be like that? what has this to do with the registry value and cracking the application? I did not patch anything. I have looked in my ntdll file and there are no functions at the specified addresses... Could you give me a hint on this one? Thanks, Devoney
abcd Author 04. Dec 2007	@xylitol run it from command prompt,it should run fine... @Devoney you are nearly there...just a little bit more...
Devoney 04. Dec 2007	ok, from the memory stack address 0022FD40 to 0022FD47 the bytes are only filled when I debug the program using OllyDbg. When I output the data with a messagebox outside the debugger the bytes are empty. Is this a debug trick? and when these bytes are empty line 401695 is skipped, so the jump to 401AA5, skipping the goodboy message, is taken. Do I miss a part here? I definitely need a hint ;)
myitweb 24. Dec 2007	One question: what's crackmes means?
abcd Author 25. Dec 2007	@myitweb...just a name to indiacte that it's gotta be reversed.... @Devoney...any luck yet??

abex's abex1

Download haque_abex1.zip, 3 kb (password: crackmes.de)
Browse contents of haque_abex1.zip

cd-protection

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 04. Nov, 2001
Downloads: 8220

Rating

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Solutions

Solution by thomas.idpz.net, published 13. aug, 2004; download (8 kb), password: crackmes.de or browse.

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Solution by Squajbob, published 16. feb, 2004; download (3 kb), password: crackmes.de or browse.

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Solution by ShadowMaster, published 15. sep, 2003; download (1 kb), password: crackmes.de or browse.

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Solution by barcode_, published 22. mar, 2003; download (2 kb), password: crackmes.de or browse.

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Solution by Cipher, published 27. jul, 2002; download (1 kb), password: crackmes.de or browse.

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Solution by haque, published 04. nov, 2001; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

h9430130 12. Mar 2007	this problem is so easy~!! how to upload my fixed file??
zairon Moderator 12. Mar 2007	Submission is closed because there are too many solutions for this crackme, we don't need another one. Please, work on unsolved crackmes :)
SubmiN\|KinG 12. Mar 2007	zairon: i agree, this one was too simple... hehe :P
optiplex 19. Jul 2007	nice , very very nice , i also figured out you dont have to change to .. wel i dont know if im allowed to say :P but anyway, there is also another way :)
crackpot1978 15. Apr 2008	Solved, too. Very easy ;o)
Wofo 02. Oct 2008	Nice for newbies like me, my first resolved crackme :D
ArekBulski 22. Sep 2010	I like this one. Code is short, so it's not overwhelming me. Will definitely look at other crackmes from abex. =)
phylixal 09. Mar 2013	solved. My first crack.

abex's abex2

Download l2cabxc2.zip, 6 kb (password: crackmes.de)
Browse contents of l2cabxc2.zip

Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 5550

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Solutions

Solution by thomas.idpz.net, published 13. aug, 2004; download (8 kb), password: crackmes.de or browse.

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Solution by AttilhaZ, published 16. may, 2004; download (20 kb), password: crackmes.de or browse.

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Solution by Tsongkie, published 28. oct, 2003; download (64 kb), password: crackmes.de or browse.

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Solution by Cipher, published 23. dec, 2002; download (3 kb), password: crackmes.de or browse.

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Solution by Exhuman, published 19. sep, 2002; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

abex's abex4

Download l2cabxc4.zip, 5 kb (password: crackmes.de)
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Serial / VB ?

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 18. Sep, 2002
Downloads: 4191

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Solutions

Solution by thomas.idpz.net, published 13. aug, 2004; download (8 kb), password: crackmes.de or browse.

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Solution by Cipher, published 22. dec, 2002; download (2 kb), password: crackmes.de or browse.

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Solution by Scooby D0o, published 30. sep, 2002; download (4 kb), password: crackmes.de or browse.

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Solution by Exhuman, published 26. sep, 2002; download (22 kb), password: crackmes.de or browse.

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Discussion and comments

abex's abex5

Download haque_abex5.zip, 45 kb (password: crackmes.de)
Browse contents of haque_abex5.zip

serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 04. Nov, 2001
Downloads: 10488

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Solutions

Solution by thomas.idpz.net, published 13. aug, 2004; download (8 kb), password: crackmes.de or browse.

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Solution by Tsongkie, published 26. oct, 2003; download (3 kb), password: crackmes.de or browse.

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Solution by Cipher, published 27. jul, 2002; download (26 kb), password: crackmes.de or browse.

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Solution by haque, published 04. nov, 2001; download (45 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Hybr!d 04. Dec 2005	This is really good for a begginer like me. Thanx for the crackme!!
Xodarap 02. Jan 2006	Nice and easy. I like it :)
crackpot1978 15. Apr 2008	Solved, too - patched & keygen. Great tut ;o)
ArekBulski 23. Sep 2010	I like it, too. I got lost around those string-concat functions because I forgot that 1st parameter is a 2nd push. Another lesson learned the hard way. x)
phylixal 09. Mar 2013	easy enough for baby.
CrackMyAss 11. Mar 2013	just combine several strings to the same serial "L2C-57816784-ABEX"?? and the "GetVolumeInformation" seems useless??

abex's abex 3

Download l2cabxc3.zip, 2 kb (password: crackmes.de)
Browse contents of l2cabxc3.zip

Keyfile

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 4411

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Solutions

Solution by thomas.idpz.net, published 13. aug, 2004; download (8 kb), password: crackmes.de or browse.

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Solution by Cipher, published 22. dec, 2002; download (2 kb), password: crackmes.de or browse.

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Solution by Exhuman, published 19. sep, 2002; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

ArekBulski 23. Sep 2010	Simple code but very instructing, I like it. It totally reminded me that numbers in asm are in hex-system, so "cmp eax,12" is ...really... not twelve. =)
r-Evolution 27. Sep 2010	@ArekBulski cmp eax, 12 = cmp eax, 9 --> on decimal mode.You should know debuggers show numbers on hexadecimal mode.@Abex just one tip next time you write a keyfile if you don't like to make a multiple keyfile at least make it check for a standart key obsfucate the code pack it make a debug trick.And not a key whatever the cracker likes.I got bored on doing that.It's sooo obvious it took my 5 secs
r-Evolution 27. Sep 2010	i mean cmp eax, 12 = 18 idk where the fuck my brain was when i wrote this

ABugger's ABugger's fisrt crackme

Download ABuggerKeygenMe.zip, 6 kb (password: crackmes.de)
Browse contents of ABuggerKeygenMe.zip

This is my first crackme, it's developed in c# and obfuscated by my own obfuscator.
the only goal is make keygen.

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 01. Jul, 2013
Downloads: 270

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by iSSoGoo, published 18. jul, 2013; download (45 kb), password: crackmes.de or browse.

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Discussion and comments

ABugger Author 01. Jul 2013	No one are trying this crackme?
seVeb 02. Jul 2013	Downloaded it but I don't have any clue how to deal with obfuscated code :(
Jacker31 02. Jul 2013	Currently trying ... but it might take me some times....
neo85 02. Jul 2013	@seVeb: read the whole obfuscated code, try renaming the variable/object names and you will understand the code. The usual keygens generate password from username, but with this one I think generating password from username is much harder then generating username from password.
Fatih54102 12. Jul 2013	de4dot can deobfuscate a bit. i did not try making keygen.
Tiemooowh 29. Apr 2014	I think it was a quiet nice .NET application to reverse engineer. A few pitfalls make it challenging.

ABugger's MathCrackMe

Download MathCrackMe.zip, 4 kb (password: crackmes.de)
Browse contents of MathCrackMe.zip

It's just a little math crackme.

goal: find the valid combination without patching.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 15. Aug, 2013
Downloads: 265

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Solutions

Solution by Gunther, published 03. sep, 2013; download (2 kb), password: crackmes.de or browse.

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Solution by stlcoder, published 16. aug, 2013; download (82 kb), password: crackmes.de or browse.

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Discussion and comments

haymizrachi 04. Dec 2015	The combination is 1 15 6, good crackme.

ABugger's Second crackme

Download ABuggerCrackMe2.zip, 33 kb (password: crackmes.de)
Browse contents of ABuggerCrackMe2.zip

This is my second crackme and it's very easy.
goal:make this crackme in trial mode without patching.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 10. Jul, 2013
Downloads: 922

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Solutions

Solution by Gunther, published 18. jul, 2013; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

Gunther 11. Jul 2013	Very simple indeed but would be good for people who are trying crackme(s) for the very first time.

abzet's EasyCrackme

Download crakmeeasy.zip, 2 kb (password: crackmes.de)
Browse contents of crakmeeasy.zip

Find the hardcoded password. good luck ;)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 05. Nov, 2004
Downloads: 1727

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Solutions

Solution by D4M4G3_C453, published 05. nov, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by Elrick, published 05. nov, 2004; download (1 kb), password: crackmes.de or browse.

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acafeel's aCaFeeL's CrackMe V3

Download CrackMeV3.Fixed.zip, 102 kb (password: crackmes.de)
Browse contents of CrackMeV3.Fixed.zip

You have to find the correct code for your name.

G'luk

aCaFeeL

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 06. Oct, 2006
Downloads: 235

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Discussion and comments

BaKaE 06. Oct 2006	what was wrong ?? why must it reuploaded ??
zairon Moderator 06. Oct 2006	Little bug.
BaKaE 06. Oct 2006	ok! downloaded both ;-) is it right that the difficulty-level was changed (4 -> 3)??
zairon Moderator 07. Oct 2006	Yes

acid_burn's This First VB Crackme

Download acidburn1.zip, 91 kb (password: crackmes.de)
Browse contents of acidburn1.zip

NaG / nAME-sERIAL / anti Smart check

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 18. Jul, 2002
Downloads: 3192

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Solutions

Solution by EsKiMo, published 15. jan, 2006; download (524 kb), password: crackmes.de or browse.

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EsKiMo 07. Jan 2006	I busted a fossil :)

acid bytes's cff crackme #2

Download cffo_2.zip, 129 kb (password: crackmes.de)
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serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. May, 2000
Downloads: 8681

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Solutions

Solution by bRaiN_faKKer, published 08. oct, 2002; download (917 b), password: crackmes.de or browse.

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Solution by Cipher, published 27. jul, 2002; download (2 kb), password: crackmes.de or browse.

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Solution by calculici, published 09. may, 2000; download (1 kb), password: crackmes.de or browse.

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Solution by frogger, published 09. may, 2000; download (893 b), password: crackmes.de or browse.

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Solution by code_inside, published 09. may, 2000; download (1006 b), password: crackmes.de or browse.

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acid bytes's cff crackme #3

Download cffo_3.zip, 126 kb (password: crackmes.de)
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name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 13. May, 2000
Downloads: 6043

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Solutions

Solution by nEo_TheOne, published 26. feb, 2004; download (637 b), password: crackmes.de or browse.

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Solution by Cipher, published 27. jul, 2002; download (2 kb), password: crackmes.de or browse.

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Solution by calculici, published 13. may, 2000; download (1 kb), password: crackmes.de or browse.

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Solution by code_inside, published 13. may, 2000; download (3 kb), password: crackmes.de or browse.

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acid bytes's cff crackme #4

Download cffo_4.zip, 175 kb (password: crackmes.de)
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name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. Jul, 2000
Downloads: 5114

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by c_07, published 09. jul, 2006; download (566 kb), password: crackmes.de or browse.

c_07 has rated this crackme as boring crap.

Solution by nEo_TheOne, published 24. feb, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by Crudd, published 13. dec, 2002; download (10 kb), password: crackmes.de or browse.

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Solution by kgb, published 09. jul, 2000; download (1 kb), password: crackmes.de or browse.

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acid cool 178's crackme #1

Download ac178_cm1.zip, 4 kb (password: crackmes.de)
Browse contents of ac178_cm1.zip

nag

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Sep, 2000
Downloads: 4451

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Solutions

Solution by boylizard, published 16. sep, 2003; download (1 kb), password: crackmes.de or browse.

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Solution by code_inside, published 01. sep, 2000; download (3 kb), password: crackmes.de or browse.

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Solution by CuTedEvil, published 01. sep, 2000; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

crackpot1978 16. Apr 2008	Solved - very very easy ;O)
daweedman 18. Jan 2011	even a caveman can do it XD

acid cool 178's Crackme 1a for josephCo´s ExDec

Download ac_exdec_01_a.zip, 3 kb (password: crackmes.de)
Browse contents of ac_exdec_01_a.zip

Nag

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Jul, 2002
Downloads: 2902

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Solutions

Solution by Cipher, published 26. jul, 2002; download (4 kb), password: crackmes.de or browse.

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acid cool 178's Crackme 1 for josephCo´s ExDec

Download ac_exdec_01.zip, 2 kb (password: crackmes.de)
Browse contents of ac_exdec_01.zip

Nag

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Jul, 2002
Downloads: 3955

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Solutions

Solution by Cipher, published 26. jul, 2002; download (3 kb), password: crackmes.de or browse.

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Solution by CuTedEvil, published 18. jul, 2002; download (4 kb), password: crackmes.de or browse.

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acid cool 178's Crackme 2a for josephCo´s ExDec

Download ac_exdex_02_a.zip, 3 kb (password: crackmes.de)
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Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Jul, 2002
Downloads: 3672

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Solutions

Solution by nEo_TheOne, published 27. feb, 2004; download (539 b), password: crackmes.de or browse.

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Solution by Cipher, published 26. jul, 2002; download (677 b), password: crackmes.de or browse.

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Solution by CuTedEvil, published 18. jul, 2002; download (809 b), password: crackmes.de or browse.

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acid cool 178's Crackme 2b for josephCo´s ExDec

Download ac_exdec_02_b.zip, 3 kb (password: crackmes.de)
Browse contents of ac_exdec_02_b.zip

Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Jul, 2002
Downloads: 3221

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Solutions

Solution by vxboy, published 13. apr, 2006; download (28 kb), password: crackmes.de or browse.

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Solution by sennin, published 24. aug, 2005; download (939 b), password: crackmes.de or browse.

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Solution by Cipher, published 26. jul, 2002; download (948 b), password: crackmes.de or browse.

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acid cool 178's Crackme Number 2 of 178

Download ac_crackme_2.78.zip, 87 kb (password: crackmes.de)
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Serial Protection - Command Prompt

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Jul, 2002
Downloads: 2962

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Solutions

Solution by Cipher, published 05. aug, 2002; download (650 b), password: crackmes.de or browse.

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acid cool 178's Crackme Number 3 of 178

Download ac_crackme_3.78.zip, 4 kb (password: crackmes.de)
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Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Jul, 2002
Downloads: 3148

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Solutions

Send a message to Acid_Crack »

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Solutions

Solution by Kabbalah, published 22. dec, 2004; download (6 kb), password: crackmes.de or browse.

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Solution by Haykuro, published 06. dec, 2004; download (505 b), password: crackmes.de or browse.

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Acid_Crack's Matrix_Acid_Crack

Download matrix.zip, 31 kb (password: crackmes.de)
Browse contents of matrix.zip

Try to crack it....

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. Sep, 2003
Downloads: 1983

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Solutions

Solution by Oorja-HalT, published 11. oct, 2003; download (2 kb), password: crackmes.de or browse.

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adamziaja's crackme1

Download crackme1.tar.gz, 15 kb

try to solve :)

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 14. May, 2014
Downloads: 860

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Solutions

Solution by LeoC, published 09. sep, 2014; download (604 b), password: crackmes.de or browse.

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Solution by baderj, published 01. jul, 2014; download (4 kb), password: crackmes.de or browse.

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Adjiang's KeyGenMe2

Download KeyGenMe2.zip, 14 kb (password: crackmes.de)
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KeyGenMe2 by Adjiang Include License.dat
Hi all cracker,i just make my new keygenme!
Rules:
1.Find a valid serial.
2.No Patching and Brute Force is allowed.
3.Enjoy:)
Keygen it and send your solution at slzeagle@hotmail.com

Best Regards
Adjiang

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 06. Mar, 2007
Downloads: 420

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Adjiang's KeyGenMe3

Download KeyGenMe3.zip, 18 kb (password: crackmes.de)
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KeyGenMe3 by Adjiang
Rules:
1.Find a valid serial.
2.No Patching and Brute Force is allowed.
3.Enjoy:)
Keygen it and send your solution at slzeagle@hotmail.com

Best Regards
Adjiang

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: (Visual) Basic

Published: 20. Mar, 2007
Downloads: 562

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by xylitol, published 21. oct, 2007; download (161 kb), password: crackmes.de or browse.

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Discussion and comments

br0ken 21. Oct 2007	Nice solution ;) I learned from yours.
br0ken 21. Oct 2007	To the mods. My solution is similar to xylitol's. Only difference is , I used Olly. Should I upload?
xylitol 21. Oct 2007	ok thx br0ken yes upload it :)
Adjiang Author 03. Nov 2007	Sorry,reply late!Mods is oke,br0ken!Easy,mate!Just keygen it.
Adjiang Author 03. Nov 2007	Yeah,i just upload new one!xylitol,you're smart only no keygen yet!!!!!!!!!

Adjiang's Keygenme4

Download Keygenme4.zip, 36 kb (password: crackmes.de)
Browse contents of Keygenme4.zip

Keygenme4 by Adjiang
Rules:
1.Defeated fake activation key
2.Find random valid key it only use number
3.Keygen it and send your solution at slzeagle@hotmail.com

Any bugs,suggestions or comments:
Best regards
Adjiang
Contact at messenger:slzeagle@hotmail.com

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: (Visual) Basic

Published: 31. Mar, 2007
Downloads: 573

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Adjiang's keyGenMe#5

Download KeyGenMe#5.zip, 30 kb (password: crackmes.de)
Browse contents of KeyGenMe#5.zip

KeyGenMe#5 by Adjiang
Rules:
1.Find a valid serial.
2.No Patching and Brute Force is allowed.
3.Enjoy:)
Activated all feature with keygen the only solution and send your solution at slzeagle@hotmail.com

Best Regards
Adjiang

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: (Visual) Basic

Published: 04. Nov, 2007
Downloads: 534

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Discussion and comments

MR.HAANDI 04. Nov 2007	@author: after 5 (not really high rated) VB crackmes, why don't you write what is special about this one, or why is it sth. other than your previous one, or why you've choosen VB as the language for it.
ChupaChu 07. Nov 2007	Im not much into VB, but it seems there is some crypto (maybe DES or similar) that creates a hash using name, id , and name of file (or project "KeyGenMe#5") whats being used as a key im not sure..
z01b 08. Nov 2007	i don't like crackmes on VB :(
z01b 08. Nov 2007	P.S. If i use as Name " ' ", the program gets overflowed
z01b 08. Nov 2007	i'm sorry, keycode

Adjiang's KeyGenMe#MD5+TEAN +BLOWFISH+CRC32 Boom

Download KeyGenMe#MD5+TEAN_+BLOWFISH+CRC32_Boom.zip, 100 kb (password: crackmes.de)
Browse contents of KeyGenMe#MD5+TEAN_+BLOWFISH+CRC32_Boom.zip

KeyGenMe#MD5+TEAN +BLOWFISH+CRC32 Boom
1.Packed With UPX(Overlay)
2.Anti Patching
3.MD5,TEA,Blowfish Hash Algorithm
4.Anti Brute Force Attack
5.Solved it!

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 09. Feb, 2006
Downloads: 955

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Solutions

Solution by Ank83, published 16. feb, 2006; download (122 kb), password: crackmes.de or browse.

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Discussion and comments

saitob 14. Aug 2007	I can't run the selfkeygen :S
Shism 16. Aug 2007	yup faulty solution......
Shism 21. Apr 2008	the self-keygen works now

adrianbn's lincrackme1

Download lincrackme2.tgz, 2 kb

This is a linux crackme (32 and 64 bit). The goal is to obtain the correct key (there's just one valid key).

The crackme implements simple anti-debugging/anti-dissasembling tricks you'll have to bypass to get the key. Thus, the purpose is to learn this tricks and how to bypass them to achieve your goal.

This crackme is part of a series of crackmes I'll be publishing with different tricks, so people can learn more about this techniques in Linux.

Patching is allowed as last resource only. The key generation method is not complicated, because its not the goal of the crackme.

Have fun!

My own solution (and maybe some of yours) will be published here: http://securityetalii.es

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 11. Oct, 2010
Downloads: 529

Rating

Votes: 7
Crackme is boring.

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Solutions

Solution by danieloop, published 21. oct, 2010; download (1 kb), password: crackmes.de or browse.

danieloop has rated this crackme as nothing special.

Solution by miguel, published 16. oct, 2010; download (1 kb), password: crackmes.de or browse.

miguel has rated this crackme as boring crap.

Solution by mensa13, published 16. oct, 2010; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

tamaroth Moderator 11. Oct 2010	I'll wait for next ones, this one didn't even require launching it (simple strcmp and key generation that can be calculated on a paper, just use IDA), drop a few more, more complicated crackmes/keygenmes for lin ;-)
adrianbn Author 12. Oct 2010	Fair enough tamaroth ;) I'll be publishing more crackmes, increasing difficulty step by step, but I promise that in two or three more, you won't be able to use dead code analysys so easily ;) Anyway, I recommend you that you try to find the antidebugging tricks, so next crackmes will be easier :) Thanks for trying it and giving feedback!
tamaroth Moderator 13. Oct 2010	I gave it a go with debugging under gdb, was quite interesting doing it for the first time, i considered writing some words about setting up your gdb and walking with it, but little bird told me that there's a tut in a queue already, so i stopped ;p

adrianbn's lincrackme3

Download lincrackme3.tgz, 5 kb

This is the second of the lincrackme's series. The package contains a 32 bit version and a 64 bit one. The 32 bit version should work fine in a 64 bit system anyway, but just in case...

As usual, the goal is to locate and understand the antidebugging techniques, and learn how to disable them. Once that's done, you have to understand the key checking method and get some valid keys (best if you make a keygen for it!!).

You can patch the binary to bypass the antidebugging techniques (however thats not mandatory), but you shouldn't patch to get the right message. Find the correct key algorithm. Brute-forcing the keys is not allowed either.

My own solution, (and maybe some of yours, if you want) will be published here: http://securityetalii.es with the solutions to the rest of the lincrackmes series (lincrackme2 so far).

PS: Give me all the feedback you can, please, about the difficulty level (is it right?) and everything else. You can contact in the comments or by mail at adrianbn[_AT_]gmail [_dOt_]com. Thanks!

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 01. Nov, 2010
Downloads: 529

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by hasherezade, published 23. nov, 2010; download (580 kb), password: crackmes.de or browse.

hasherezade has rated this crackme as awesome.

Solution by miguel, published 21. dec, 2010; download (5 kb), password: crackmes.de or browse.

miguel has rated this crackme as nothing special.

Solution by jjjjj, published 21. dec, 2010; download (2 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

tamaroth Moderator 15. Nov 2010	Quite fun. Used ida + remote debugging to get to the code, quite fun. Even though you said no bruteforcing is allowed, i used simple brute force to generate completely random serials. i hope that's enough ;-) Here are few sample serials: 3912-8939-1011-6139 0436-4302-0400-1033 1725-3837-3107-3220 I'm quite bad at writing tutorials, but maybe i'll drop one once i get some willingness into me ;p
adrianbn Author 17. Nov 2010	Hi tamaroth, Im glad you enjoyed the crackme. Did you actually got the key from the code or made a bf program who generates keys and tests them against the crackme? The second one is like cheating! :P The algo is quite open, in the meaning that there are lots of valid keys, so a bf attempt will likely succeed. Put some willingness and be the first to submit a solution ;)
tamaroth Moderator 17. Nov 2010	I'll drop you my keygenerator (it's written in C, all by myself), therefore it's a keygen but it uses some form of brute force (generates random numbers and then check then against the checks that are made inside crackme). See pm with the link to the keygen :)
adrianbn Author 17. Nov 2010	Tamaroth, that's exactly the kind of solution I was looking for. I first understood that you just generated random numbers and feed the crackme with them to see if they fit. That was obviously not allowed. However your keygen demonstrates that you've bypassed all the protections, understood the code and code somthing similar in C to find the keys. Very nice job! :)
hasherezade 17. Nov 2010	i solved it too... very pleasant crackme, thank You!
hasherezade 17. Nov 2010	some other sample keys: 5567-5545-5500-5600 4555-9998-7766-1000 ^^ I will submit my solution as soon as i will get some time to describe it nicely.
adrianbn Author 18. Nov 2010	Hi hasherezade, Good you find the crackme pleasant :) Go for it and post a solution!
miguel 23. Nov 2010	The key algo is funny. The antidebugging protections are well known by reversers. My solution is waiting the moderators review since nov, 12th they may be really busy. ;-)
adrianbn Author 26. Nov 2010	Finally hasherezade's solution went through. Good job dude! It's very good, both technically and written/explained. I promise I'll publish next crackme (harder ;) soon, Im quite busy at the moment, but december should be a good month to program a little. Hope there are more solutions on the way (thanks miguel). I love reading how each person solves it in different ways :)
acez 06. Nov 2012	very good crackme, i will post my solution soon 4148-2898-8124-1114
tvk6843 08. Dec 2014	Just for fun :-) The keygen should starts from the sums of the numbers the key is: 0049-0005-0004-1310 the key is: 0049-0005-0004-1400 the key is: 0049-0005-0004-2003 the key is: 0049-0005-0004-2012 the key is: 0049-0005-0004-2021 the key is: 0049-0005-0004-2030 the key is: 0049-0005-0004-2102 the key is: 0049-0005-0004-2111 the key is: 0049-0005-0004-2120 the key is: 0049-0005-0004-2201 the key is: 0049-0005-0004-2210 the key is: 0049-0005-0004-2300 the key is: 0049-0005-0004-3002 the key is: 0049-0005-0004-3011 the key is: 0049-0005-0004-3020 the key is: 0049-0005-0004-3101 the key is: 0049-0005-0004-3110 the key is: 0049-0005-0004-3200 the key is: 0049-0005-0004-4001 the key is: 0049-0005-0004-4010 the key is: 0049-0005-0004-4100 the key is: 0049-0005-0004-5000
blankwall 24. Apr, 20:41	http://paste.ubuntu.com/16035640/

Aenox's CrackMe4rd

Download CrackMe4rd.zip, 16 kb (password: crackmes.de)
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Nag and button activation timer. Shouldn't be too hard (or easy!)."

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 08. Jun, 2005
Downloads: 914

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Solutions

Solution by red477, published 20. jun, 2005; download (23 kb), password: crackmes.de or browse.

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Discussion and comments

Aenox Author 08. Jun 2005	This was fun to try and crack myself. I didn't follow any anti-cracking guides but still tried some protection. Please post your observations or even if you only manage to correctly remove the first nag.
pxor 08. Jun 2005	it was too easy to remove nag just breaking it on messageboxa and patch 1 byte :/ these same with timer validation proc of activation code looks nasty ;p (its good :D) name -> registration code is too easy but its good that u put that in another thread :o there was also some fake calls :D keep trying :P
Aenox Author 09. Jun 2005	Only patching 1 byte to remove the nag will stop the program functioning in other ways...
Oorja-HalT 22. Jun 2005	I think the solution for this crackme is incomplete without mentioning why a breakpoint is set on 4012F0.
red477 22. Jun 2005	Sorry for that,I'd ever thought i did not have to explain everything very very clearly.And the most important,I am a very newbie,so plz forgive me for my mistakes. I set a breakpoint there just that the ollydbg told me that it is the ThreadFunction there: 00401593 . 68 F0124000 push CrackMe4.004012F0 ; \|ThreadFunction = CrackMe4.004012F0<-the keygen funtion!? I think it must be useful.so...you can say that I cracked it just not by the little brain but by the little luck. :) Again I feel sorry for any defects that are in my solution. ==================== sorry for my english...:(
Oorja-HalT 22. Jun 2005	You need'nt be that appologetic. BTW did you notice the sleep call just after the create thread (of equal priority : pointer to thread function at 4012F0). After that Sleep is called at parameter passed for sleep is 0. And if you look at the explanation for winapi sleep you would find "A value of zero causes the thread to relinquish the remainder of its time slice to any other thread of equal priority that is ready to run. If there are no other threads of equal priority ready to run, the function returns immediately, and the thread continues execution." So what sleep does is to direct the control flow to 4012F0 which have the algo to check user input" It was a clever way to conceal and execute the serial verification
donjoe145 18. Aug 2005	I cracked in like 4-5 min. it was real fun in response to Aenox for the nag i just nop'd 4016AC-4016B0 and 401745-401749, i found those calls with ida's XREF and patched with olly, to Aenox do those patches stop the programming in functioning in others ways?

aeorophagia's Secret

Download secret.zip, 213 kb (password: crackmes.de)
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KeygenMe

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 24. May, 2004
Downloads: 1352

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Solutions

Solution by shvanz0r, published 12. jul, 2004; download (3 kb), password: crackmes.de or browse.

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Solution by ZeroZero, published 25. may, 2004; download (7 kb), password: crackmes.de or browse.

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Solution by Plasmator, published 25. may, 2004; download (30 kb), password: crackmes.de or browse.

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Solution by +Pumqara, published 25. may, 2004; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

Aesculapius's +HCU Strainer

Download aescu_mi.zip, 3 kb (password: crackmes.de)
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Strainer. Name/Serial

Difficulty: 9 - You can't solve this yourself :)
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 4053

Rating

Votes: 8
Crackme is nothing special.

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Solutions

Solution by Canterwood, published 09. jan, 2004; download (74 kb), password: crackmes.de or browse.

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Solution by havok, published 25. oct, 2003; download (12 kb), password: crackmes.de or browse.

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Solution by kRio, published 29. jun, 2005; download (18 kb), password: crackmes.de or browse.

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Discussion and comments

Agent's [pSyChoO_cRaCkmE]

Download psychoo.zip, 2 kb (password: crackmes.de)
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if you can crack it you're real psychoo crack

Difficulty: 7 - Very hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 13. Sep, 2003
Downloads: 2050

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Solutions

Solution by boylizard, published 19. sep, 2003; download (4 kb), password: crackmes.de or browse.

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Solution by diablo2oo2, published 16. sep, 2003; download (3 kb), password: crackmes.de or browse.

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aharli's crackme

Download crackme.zip, 7 kb (password: crackmes.de)
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Please Crack this file

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 21. May, 2008
Downloads: 581

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by xylitol, published 23. jun, 2008; download (1537 kb), password: crackmes.de or browse.

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Solution by costy, published 23. jun, 2008; download (79 kb), password: crackmes.de or browse.

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Send a message to Ahmet_SS0 »

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Discussion and comments

MACH4 21. May 2008	Too easy by far!!!
andrewl.us Moderator 22. May 2008	MACH4: Maybe it's time you try something harder than level 1, 2
Jim~ 22. May 2008	The scrambled/obfuscated code doesn't do anything to make the crackme harder, since the user/pass are stored as plain text in plain sight.
MACH4 22. May 2008	yea, I getting bored now! looking at those old unsolved dos ones!

Ahmet_SS0's Ahmet_SS_Crackme#2

Download Ahmet_SS_Crackme#2.zip, 10 kb (password: crackmes.de)
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NO patch
No bruteforce
Please make a keygen

if u can make a video , how did u do that , i will give a special thank you. Cause of everyone
will learn how can do it...

Good luck !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 19. Feb, 2009
Downloads: 458

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Solutions

Solution by kstangl, published 23. feb, 2009; download (27 kb), password: crackmes.de or browse.

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Solution by freesoul, published 20. feb, 2009; download (18 kb), password: crackmes.de or browse.

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Send a message to AK87 »

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Discussion and comments

freesoul 20. Feb 2009	solution sent... xD
EKo-rus 20. Feb 2009	helo! I badly know English and i don't make a keygen, but: Lable1 - EKo-rus Lable2 - 618F82E0-54C6D738
freesoul 20. Feb 2009	fishing serial it's extremely easy :D
EKo-rus 20. Feb 2009	0040110C \|> 8B45 FC /MOV EAX,DWORD PTR SS:[EBP-4] 0040110F \|. 83C0 01 \|ADD EAX,1 00401112 \|. 8945 FC \|MOV DWORD PTR SS:[EBP-4],EAX 00401115 \|> 8B4D 08 MOV ECX,DWORD PTR SS:[EBP+8] 00401118 \|. 034D FC \|ADD ECX,DWORD PTR SS:[EBP-4] 0040111B \|. 0FBE11 \|MOVSX EDX,BYTE PTR DS:[ECX] 0040111E \|. 85D2 \|TEST EDX,EDX 00401120 \|. 74 02 \|JE SHORT Ahmet_SS.00401124 00401122 \|.^EB E8 \JMP SHORT Ahmet_SS.0040110C - This code reads the typed key 004011A3 \|> 8B45 FC /MOV EAX,DWORD PTR SS:[EBP-4] 004011A6 \|. 83C0 01 \|ADD EAX,1 004011A9 \|. 8945 FC \|MOV DWORD PTR SS:[EBP-4],EAX 004011AC \|> 8B4D 08 MOV ECX,DWORD PTR SS:[EBP+8] 004011AF \|. 034D FC \|ADD ECX,DWORD PTR SS:[EBP-4] 004011B2 \|. 0FBE11 \|MOVSX EDX,BYTE PTR DS:[ECX] 004011B5 \|. 85D2 \|TEST EDX,EDX 004011B7 \|. 74 02 \|JE SHORT Ahmet_SS.004011BB 004011B9 \|.^EB E8 \JMP SHORT Ahmet_SS.004011A3 - This code generates the correct key YES???
freesoul 20. Feb 2009	no xD, that code just calculates length

Solutions

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Discussion and comments

hound 25. Jun 2007	004010D9 \|> /8B4D FC /MOV ECX,[LOCAL.1] 004010DC \|. \|83C1 01 \|ADD ECX,1 004010DF \|. \|894D FC \|MOV [LOCAL.1],ECX 004010E2 \|> \|8B55 FC MOV EDX,[LOCAL.1] 004010E5 \|. \|3B55 0C \|CMP EDX,[ARG.2] 004010E8 \|. \|7D 4F \|JGE SHORT keygenme.00401139 004010EA \|. \|837D FC 1E \|CMP [LOCAL.1],1E 004010EE \|. \|7D 35 \|JGE SHORT keygenme.00401125 004010F0 \|. \|8B45 08 \|MOV EAX,[ARG.1] 004010F3 \|. \|0345 FC \|ADD EAX,[LOCAL.1] 004010F6 \|. \|0FBE08 \|MOVSX ECX,BYTE PTR DS:[EAX] 004010F9 \|. \|8B55 08 \|MOV EDX,[ARG.1] 004010FC \|. \|0355 FC \|ADD EDX,[LOCAL.1] 004010FF \|. \|0FBE42 03 \|MOVSX EAX,BYTE PTR DS:[EDX+3] 00401103 \|. \|03C8 \|ADD ECX,EAX ; adds +0 and + 3 00401105 \|. \|8B55 08 \|MOV EDX,[ARG.1] 00401108 \|. \|0355 FC \|ADD EDX,[LOCAL.1] 0040110B \|. \|0FBE42 01 \|MOVSX EAX,BYTE PTR DS:[EDX+1] 0040110F \|. \|8B55 08 \|MOV EDX,[ARG.1] 00401112 \|. \|0355 FC \|ADD EDX,[LOCAL.1] 00401115 \|. \|0FBE52 02 \|MOVSX EDX,BYTE PTR DS:[EDX+2] 00401119 \|. \|2BC2 \|SUB EAX,EDX ; sub +2 from + 1 0040111B \|. \|3BC8 \|CMP ECX,EAX 0040111D \|. \|74 04 \|JE SHORT keygenme.00401123 0040111F \|. \|32C0 \|XOR AL,AL 00401121 \|. \|EB 18 \|JMP SHORT keygenme.0040113B 00401123 \|> \|EB 12 \|JMP SHORT keygenme.00401137 00401125 \|> \|8B45 08 \|MOV EAX,[ARG.1] 00401128 \|. \|0345 FC \|ADD EAX,[LOCAL.1] 0040112B \|. \|0FBE08 \|MOVSX ECX,BYTE PTR DS:[EAX] 0040112E \|. \|83F9 6F \|CMP ECX,6F ; 'o' 00401131 \|. \|74 04 \|JE SHORT keygenme.00401137 00401133 \|. \|32C0 \|XOR AL,AL 00401135 \|. \|EB 04 \|JMP SHORT keygenme.0040113B 00401137 \|>^\EB A0 \JMP SHORT keygenme.004010D9 Uh, I think there must be a mistake in this, as there is no way of a difference in characters to equal their sum, with ASCII characters.... As the last two characters are 'o', then you should be able to work backwards, if you randomly generate a character before the 'o's. E.g. Xkoo. You can then work out X using the sums and differences, but the sums end up about $F0, and this is MASSIVE difference, between any ascii characters. Please correct me, if Im wrong though Cheers -hound
TiGa 25. Jun 2007	There is an anti-debug trick that trips even outside a debugger and sends a "divide by 0" error. If the last 2 chars are 'o', the 3rd to last should be 00. X = 3rd to last char Y = 00 string-ender X+Y = 'o'-'o' X = 'o'-'o'-Y X = 00 Using hound's example of Xkoo, k would have to be 00. Unless I missed something, it doesn't look like it can be solved.
hound 25. Jun 2007	Yeah, I know all the anti debug etc, but it cant be solved because the sum-difference thing etc... The sums are the other way around the Tiga. The 1st char in the set of four is added to the 4th char, and this must equal the difference between the 2nd and 3rd (2nd - 3rd).
TiGa 25. Jun 2007	I don't think you're understanding my example. The sums are the other way around? Let's say serial finishes with koo. Verification is: char[i] + char[i+3] = char[i+1] - char[i+2] To find char[i]: char[i] = char[i+1] - char[i+2] - char[i+3] Let's find what k has to be: char[i] = 'o' - 'o' - 00 What I was trying to say is: The last time the sum-difference is checked, the 4th char is the string-ender 00. At least, we're both agreeing that it cannot be solved.
Crosys 25. Jun 2007	Well, i guess it can be solved, using chars over the standard ASCII. After some calcs i found that the 4 chars "Ã¡Ã‘Ã£Ãƒ", can be used the serial. Will correspond in the calcs.. Ã¡ 0xFFFFFFE1 Ã‘ 0xFFFFFFD1 Ã£ 0xFFFFFFE3 Ãƒ 0xFFFFFFC3 So for example, "Ã£9Ã¡u7913451345791345134579134511" will bypass first round, writing a algorithm to solve next-by-next char through the serial should be possible, im gonna look at it more tonight, just took a quick look now.
TiGa 25. Jun 2007	The problem I found is in the last round when ecx = 29. char[ecx+3] = 00 string ender When ecx = 30 or ecx = 31, char must be 'o'.
hound 25. Jun 2007	Yeah TiGa, sorry about that. You did the same thing as myself. I didn't even think about the null character being used however :S.
hound 25. Jun 2007	Crosys, only alpha numeric characters can be used, and there is also a restriction from the 16 letter word aswell...
AK87 Author 26. Jun 2007	First of all, nice analyses, I am impressed, secondly, there seemed to be a problem with the algorithm, sorry about that, here is the source, hope it will help somehow.. http://www.kucuk87.demon.nl/c/algorithm.cpp http://www.kucuk87.demon.nl/c/dialog.cpp http://www.kucuk87.demon.nl/c/main.cpp Problem is here (thanks to TiGa for pointing): for(i = 0;i < len;i++) { if(i < 30) { if((str[i] + str[i+3]) != (str[i+1] - str[i+2])) return 0; } else { if(str[i] != 'o') return 0; } } Since the serial should be 32 characters long, and when i = 29, i+3 (which should be a 0x00 byte) checks for a different character, other than that, it has too few serial combinations.

akcom's Crack Me v1

Download CrackMe1.zip, 2 kb (password: crackmes.de)
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System ID to System Key crackme. Simply write a keygen that works, no patching.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 14. Nov, 2004
Downloads: 825

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Discussion and comments

warrantyVoider 09. Jul 2005	Hi akcom, I have the feeling that thereÂ´s a problem with your crackme. If IÂ´m not mistaken You can only generate a correct serial if the first and third value and the second and fourth value of the system info string are complements (~) of each other. At least on my system thatÂ´s just not the case.
Ox87k 11. Jul 2005	hi guys, i tried this crackme but i cannot find a valid serial for my system-ID. So.. my conclusion is that there is a bug!
DeepBlue 18. Jul 2005	Then just patch this bitch, so that it accepts all serials ;D
Ox87k 18. Jul 2005	Yeah DeepBlue but akcom write "no patching" :\|
haggar 18. Jul 2005	This crackme was discussed two times under Crackmes forum and both times everybody agreed that there is bug in it and that it cannot be solved. I don't know why crackme is still here.

albertus's Keygenme.v.1.by.albertus

Download Keygenme.v.1.by.albertus.zip, 141 kb (password: crackmes.de)
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There are no anti-debbuging tricks.
Patching is not allowed.
Please write tutorial and keygen.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 19. Feb, 2014
Downloads: 520

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by cr00k3dc0d3r, published 26. mar, 2014; download (12 kb), password: crackmes.de or browse.

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Solution by basscode, published 26. mar, 2014; download (182 kb), password: crackmes.de or browse.

basscode has rated this crackme as boring crap.

Send a message to alcohol1231 »

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Discussion and comments

RaptorFactor 21. Feb 2014	Not sure if was intended or not, but the debug information is included in the binary...
basscode 22. Feb 2014	Easy keygen : User : YdWt4vT@FHH Pass : 000 User : Yik$a%xJXhGq Password : 0000 Username has to be 11 in length. Submitted my keygen. Thanks.
cr00k3dc0d3r 19. Mar 2014	Hi Albertus, Thank you for taking the time to create this crackme. I solved it and have submitted my solution.

alcohol1231's KV-Soft Crackme v0.1

Download kv-soft_crackme.zip, 20 kb (password: crackmes.de)
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It's a crackme.

You guys have to find out the password, or patch it, your choice, submit a sollution ;)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 06. Dec, 2010
Downloads: 782

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by Mayhem, published 06. dec, 2010; download (21 kb), password: crackmes.de or browse.

Mayhem has rated this crackme as boring crap.

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Discussion and comments

Mayhem 06. Dec 2010	Solved. Writing tutorial atm.
alcohol1231 Author 06. Dec 2010	Well, boring crap or not, good solution..
Mayhem 06. Dec 2010	Thanks, please excuse the "boring crap" rating, I was aiming for the "kinda boring" link but missed. :/
alcohol1231 Author 07. Dec 2010	No offence taken... ;)
zaabz 08. Dec 2010	That was a good first-timer crackmes, in my opinion. Bit easy, but still made me think.
alcohol1231 Author 08. Dec 2010	Good to hear ;)
gr00ve 13. Dec 2010	don´t really know, how I did this, but I did it. Just scrolling through the program found BAT code, and further is very simple. Pass: 4309i5gm309mi5g09i353m04gm0im54m5i93093****

Alienz's #CrackMe#

Download #CrackMe#.zip, 27 kb (password: crackmes.de)
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This is my first Crackme
You have to get the second password
I hope it will be hard to crack this :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 19. Dec, 2006
Downloads: 215

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Solutions

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Send a message to along3x »

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Discussion and comments

Alienz Author 01. Feb 2007	Hmm... is it too hard for you, or is it uncrackable? Because i dont know how to crack this without bruteforce which can take few years so I submitted it here and it is still uncracked...

along3x's zebra

Download zebrone.zip, 2 kb (password: crackmes.de)
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here' s a crackme based on solving a mat...

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jul, 2002
Downloads: 2846

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Solutions

Solution by deurus, published 13. nov, 2014; download (1671 kb), password: crackmes.de or browse.

deurus has rated this crackme as quite nice.

Solution by cronos, published 11. jul, 2002; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

deurus 12. Oct 2014	Solución completa: http://garikoitz.info/blog/2014/10/solucion-al-crackme-zebra-1-1-de-along3x/
deurus 04. Feb, 20:55	Updated: http://deurus.info/2014/10/solucion-al-crackme-zebra-1-1-de-along3x/

along3x's zebra

Download zebrone.zip, 2 kb (password: crackmes.de)
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name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 23. Apr, 2000
Downloads: 3026

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Solutions

Solution by cronos, published 23. apr, 2000; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

deurus 04. Feb, 20:57	http://deurus.info/2014/10/solucion-al-crackme-zebra-1-1-de-along3x/

als pom's crackme2

Download crackme_2.zip, 27 kb (password: crackmes.de)
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This is a simple crackme written in Visual C++ 6.0.
You have to make a keygen of it.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 24. Nov, 2009
Downloads: 1252

Rating

Votes: 3
Crackme is quite bad.

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Solutions

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Discussion and comments

Skandal87 25. Nov 2009	My first one, liked it ;) Spent most time on keygen, didnt code for a lot of time...decided to write it in delphi, next time im gonna write it in java, and then in c++, just to learn more ^^ Solution submitted.
qHF; 27. Nov 2009	Ummm... BLODYALBO that is not right. Yes, the key may work on your computer. But if you even glanced at the checking routine you would have found it gets the user name of the current person logged in. The key CANNOT be serial fished. You have to code a keygen. Perhaps it's not as "easy" as you thought? As far as the actual crackme goes, I think I am almost done. I have half of the key, I just need to figure out the rest. At first I thought it was pretty easy, but it's a bit harder than I thought. It's a nice routine, fun to figure out. Thanks for the nice crackme, als pom.
Skandal87 28. Nov 2009	Yeah qHF; you are right.. damn so my solution is wrong at the moment ;) But it seems to get computername, not the username. ..workin on it ;)
Skandal87 28. Nov 2009	Hmm no i was wrong. Its the Username. Nice number you have there as base alspom, remembers me of the good old days :P
lordram 29. Nov 2009	I'm quite sure you can make it work as a KeyGen by modifying the 00401393 to "PUSH ECX". At least it seems to work...
sffs 04. Dec 2009	I want to keygen it,but it only worked on my computer. How to get the '%lu' 's num in "RS-%ld-%lu"? On my computer,the ' %lu' 's mu is 1243984 The keygen is not full correct. ========================= procedure TForm1.Button1Click(Sender: TObject); Var User:pchar; x:Cardinal; Name,Username:String; i,m,n,sn1,sn,sn2:Integer; begin x:=255; GetMem(User,255); GetUserName(User,x); Username:=User; Name:=name1.text; m:=Length(UserName); n:=Length(Name); if n<5 then exit; sn1:=0; for i:=1 to m do begin sn1:=sn1+ord(UserName[i])+$186A0; end; sn:=sn1; i:=0; for i:=1 to n do begin sn:=sn+ord(Name[i])+$186A0; end; regnum.text:='RS-'+inttostr(sn+$7A69)+'-1243984'; end; end. ========================= Who can write a real solution,wait for your solutions.
qHF; 05. Dec 2009	I am having the same problem as sffs.... I have wrote the keygen for %ld but I cannot find where %lu is generated... can anyone throw some hints our way?
_pusher_ 05. Dec 2009	Its a bug when he formats the values.. so second value is randomized. this is what i think could be closest: var i, RegCode,BufferSize: dword; Buff : array[0..100] of char; StrName: string; pUser:pchar; begin BufferSize:=0; GetUserName(nil, BufferSize); pUser := StrAlloc(BufferSize); GetUserName(pUser, BufferSize); RegCode:=0; for i:=1 to Length(pUser) do inc(RegCode,dword(ord(pUser[i-1])+$186A0 )); StrName:=Edit1.Text; if (Length(StrName)<5) then exit; for i:=1 to Length(StrName) do inc(RegCode,dword(ord(StrName[i])+$186A0 )); inc(RegCode,$7A69); wvsprintf(buff, 'RS-%d-%u',@LongInt(RegCode)); << bug here Edit2.Text:=buff; StrDispose(pUser); end; should maybe stop the submissions now :)
als pom Author 11. Dec 2009	I have made a solution with keygen but it was refused i dont know why
_pusher_ 12. Dec 2009	als pom: do notice the "bug here" and learn from it. your submission to your own crackme, is not valid, the keygen generates same error... and thats why it would never work.
als pom Author 10. Jan 2010	for the moderator pusher the string wsprintf(buff,RS-%ld-%lu,@LongInt(RegCode));
pasharp 25. Sep 2010	I traced the stack change ,found that ,the "%lu" value are edi; dlgFunc: // dlg callback proc text:00401150 push ebp .text:00401151 mov ebp, esp .text:00401153 sub esp, 14Ch .text:00401159 push ebx .text:0040115A push esi .text:0040115B push edi //"%lu" =this edi but that the edi are assigned by Windows;
jE! 28. Sep 2010	then just grab that EDI-FROM-WINDOWS in your KGen
KAiN.iDC 04. Oct 2010	How is the serial generated ? We can see that the serial is generated in 3 parts. The first and the third part of the serial are constants : Part 1 = “RS-“ Part 3 = “-1243984” How to Calculate the second part ? The second part of the serial is separated in two Subparts for a total length of 7 characters. The first SubPart is 4 Characters length and the second SubPart is 3 characters Length. Let’s calculate the 1st Subpart : We start from the constant integer 431 and we add 100 for each char. Let’s calculate the 2nd part : We start from the constant integer 656 and we add the ASCii value of each char to 656. But over 5 chars, we have a problem the second part will be over 3 chars length. So we take the last 3 numbers and add the first number to the Subpart1. Example for ABCDEF Calculation : 1st subpart: = 431 + (Length(ABCDEF) 100) = 431 + (6100) = 1031. 2nd subpart: = 656 + (Ord(A)+ Ord(B)+ Ord(C)+ Ord(D)+ Ord(E)+ Ord(F)). = 656 + (65+66+67+68+69+70) = 656 + 405 = 1061. The Length of 1061 is over 3 chars, so we keep the right part “061” and add the left part (“1”) to the first subpart. SERIAL SECOND PART will be : 1031 +1 = “1032” and “061”. And the final SECOND PART SERIAL will be “1032061”. The final serial will be “RS-“+“1032061”+ “-1243984” “RS-1032061-1243984”.
KAiN.iDC 04. Oct 2010	I forgot the user name !!! Sigh...
johnnycannuk 08. Nov 2010	Stepping through it now... looks like it takes your logged in username and uses it to determine something. My guess it generates part 3 since on my box it is NOT 1243984 - the last 3 digits are different.
johnnycannuk 09. Nov 2010	Ok, it looks like its generating a kind of Hash...I think I have it figured out, just need to write a python app to test the theory. Very clever.
johnnycannuk 09. Nov 2010	pasharp, It actually appears to be esi not edi on my box. edi is off by 3C (60) from the correct number.
johnnycannuk 09. Nov 2010	Hmm, not esi per se but at 0012F8D4 on the stack, which is the address esi contains. Its always there right after the dialog func...
johnnycannuk 09. Nov 2010	Ok, looks like als pom is gone - his account is suspended and locked. Anyone else have any luck determining the %lu - I know where to find it in my debugger, I can serial fish anything that is on my machine, but creating a keygen that works across machines? Not exactly easy. Anyone get this yet?
HungrySNAKE 10. Nov 2010	guys, it's crack me right. IT MEANS YOU HAVE TO CRACK IT NOT TO FIND THE SERIAL OF IT '-.-
johnnycannuk 11. Nov 2010	Oh dear, HungrySNAKE appears not to have been reading the comments (no, apparently tried to crack this himself) Have a look up at moderator _pusher_ 's comment above. This crackme is broken such that it cannot be keygened. It appears to rely on the fact that wsprinfA is not a safe function...it is grabbing the %lu off the stack and its value seems to be not just unique to each platform, but unique to each program. It looks like he is calling wsprintfA with 2 format string place holders and only supplyong one value - meaning the second one is picking up that last value off the the stack (mine it is the value just above the return address) - the EBP. Meaning you can't access it from OUTSIDE the application and thus, cannot properly keygen it. Of course if I am wrong and you DO have a keygen for this, feel free to share it and prove me wrong. I'd be happy to learn from it. Otherwise, seriously, drop the snarky elite H4x0r crap...
B@zz! 19. Jun 2013	char* GenerateKey(char* Username) { int first_part = 0; int second_part = 0; char key[MAX_PATH]; char pcname[MAX_PATH]; GetUserName(pcname,MAX_PATH); for(int i=0;i<strlen(Username);i++) { first_part += Username[i] + 10000; } for(int i=0;i<strlen(pcname);i++) { first_part += pcname[i] + 1000; } first_part += 31337; printf(key,"RS-%ld-%lu",first_part,second_part); return key } basic algo how i get the second one i dont know but it's static..
botanyaki 07. Apr 2014	Hint: crack without prejudice.
d4rK_r3v3rs3R 21. Dec 2014	I did a working keygen but I guess, reading those comments it will only works for me. But try it if you want (in the description is the file written in Python): http://youtu.be/a0AynC9ub6s

Am0k's Am0k CrackMe 1

Download Am0kCM_1.zip, 25 kb (password: crackmes.de)
Browse contents of Am0kCM_1.zip

Just keygen it. Because i am new to cracking, i cant set the difficulty right so i m sry lol, but i think itll be hard ^^

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 27. Sep, 2004
Downloads: 1176

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Solutions

Solution by Plasmator, published 28. sep, 2004; download (34 kb), password: crackmes.de or browse.

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Am0k's Am0k CrackMe 2

Download Am0kCM_2.zip, 9 kb (password: crackmes.de)
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Just patch it so it will show the right messagebox :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 27. Sep, 2004
Downloads: 2309

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Solutions

Solution by zombie8, published 13. oct, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by spenser21, published 01. oct, 2004; download (10 kb), password: crackmes.de or browse.

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Solution by terazen, published 28. sep, 2004; download (10 kb), password: crackmes.de or browse.

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Solution by LuCiFeR, published 28. sep, 2004; download (926 b), password: crackmes.de or browse.

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Solution by malfunction, published 28. sep, 2004; download (959 b), password: crackmes.de or browse.

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Discussion and comments

SimpleData 21. Jan 2009	Thanks for the CrackMe. It was easy. :)
vasto 14. Sep 2010	oi! easy one, good start for newbies like me, thx ;)
r-Evolution 15. Sep 2010	Even you edit the registers in cpu even you crack it dirty it is really easy!!!!God one if it is your first
streetlight 18. Dec 2013	Thanks, was a lot of fun.:D

Am0k's amkTwo

Download amkTwo.zip, 16 kb (password: crackmes.de)
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//================================================================================================
// Project : amkTwo
// Version : 1.0
// Coder : amk
// Website : http://users.skynet.be/amk/ (Under Construction)
//================================================================================================

Objectives : - Make a valid KeyFile for your name
- Make a KeyFile Generator

Just one thing : No Patching ;D

Note : Sources are included in a passworded zip file. The password is the Key for "amkTwo" (without the quotes)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 10. Nov, 2005
Downloads: 749

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Solutions

Solution by bbvv, published 13. nov, 2005; download (22 kb), password: crackmes.de or browse.

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Discussion and comments

tommy 10. Nov 2005	finding the file that your program needs was very easy. Now, i just have to get the write code in that key file...
Ox87k 11. Nov 2005	yeah! Name: Ox87k Serial: 0SJJ00376633U611UU3D2233Q211QQ3D very g00d j0b Am0k... i try to write a keygen =)
LethalMind 12. Nov 2005	This was very fun for me cause im a total noob. My first level 2 crackme. Sorry, cant make a keygen.... Must learn to program in asm first :D but anyways, heres is my serial: Name: LethalMind S/N: B55E84695G337748S6P7O55FF4EAC9F6 P.s. Even total noobs with no asm programming skills can have fun!!!!!!!!!!! Nice work btw!
Am0k Author 13. Nov 2005	i ll make an easier one next time ;)

Am0k's Teh Nag

Download tehnag.zip, 11 kb (password: crackmes.de)
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The program is manualy packed, and protected with yoda's protector (http://yodap.cjb.net/)

Goal is to patch it like a bad boy.

Gl and hf ^^

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 20. Jan, 2005
Downloads: 989

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Solutions

Solution by pnluck, published 24. jan, 2005; download (2 kb), password: crackmes.de or browse.

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Am0k's xCrackMe

Download xCrackMe.zip, 1 kb (password: crackmes.de)
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Make a KeyFile Generator for this crackme.
No patching allowed.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 12. Mar, 2006
Downloads: 724

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Solutions

Solution by znycuk, published 20. mar, 2006; download (13 kb), password: crackmes.de or browse.

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Solution by klks, published 20. mar, 2006; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

l0calh0st 12. Mar 2006	Good work Am0k...but i don't have much knowledge about keyfileme's...i tried your's only thing i got was a keyname with"xCrackMe.key" with 164 bytes of data is required..but the data ..i m unable to find..maybe i should wait for someone to submit solution and try to follow it
Am0k Author 14. Mar 2006	yea, i tried to make a harder one this time :D The last KeyFileMe i've done was somehow easy, but it was bugged lol ^^ Anyway good luck with this :-)
znycuk 18. Mar 2006	Wow, got it... That was a really cool crackme... Very good work Am0k , thanx. Too late to write a solution, and my keyfilegen still not finished, but works ;) .

Am0k's xCrackMe 1.1

Download xCrackMe_1.1.zip, 2 kb (password: crackmes.de)
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Generate a KeyFile, and make a KeyFileGenerator :)
This one is harder then my other xCrackMe.

Good luck, and most important: have fun ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 17. May, 2006
Downloads: 537

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Solutions

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Discussion and comments

l0calh0st 22. Jul 2006	Is this thing solvable???.....The fread functions doesn't read the whole data from the keyfile...It skips the data when it read 1A from the file :?
EvOlUtIoN 23. Jul 2006	It is very strange because the fread doesn't work correctly...size to read is correct and is B0 bytes that is the right size of our string, but after fread call the stream read stops before..really don't know why!
Ox87k 15. Aug 2006	yep, same error for me... Am0k, could u fix this crackme? =)

Am0r's CrackMe VB

Download CrackMeVB.zip, 7 kb (password: crackmes.de)
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This is Visual Basic crack me
You should make keygen
witch generate key by username

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 18. Jul, 2005
Downloads: 235

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Solutions

Solution by MACH4, published 03. sep, 2013; download (336 kb), password: crackmes.de or browse.

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Amenesia's Basis#1 (Weger)

Download Basis#1.zip, 32 kb (password: crackmes.de)
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With Basis# Keygenmes (at least 2 others will come soon) i would exemplify some nice weakness...
The main goal is to understand and be able to explain how the attack works. That's why Basis# are open-source and the "name" of the weakness is given...

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: C/C++

Published: 27. Jan, 2005
Downloads: 2044

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by bLaCk-eye, published 16. mar, 2005; download (54 kb), password: crackmes.de or browse.

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Solution by chendler, published 17. feb, 2005; download (96 kb), password: crackmes.de or browse.

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Amenesia's Basis#2 RSA - Wiener

Download Basis#2.zip, 39 kb (password: crackmes.de)
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With Basis# Keygenmes (at least 2 others will come soon) i would exemplify some nice weakness. The main goal is to understand and be able to explain how the attack works. That's why Basis# KgMes are open-source and the "name" of the weakness is given...

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: C/C++

Published: 27. Jan, 2005
Downloads: 2183

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Send a message to Amnon »

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

ewerton 17. Jan 2007	i can not run =/ (sorry for me stupid english :x)
zairon Moderator 17. Jan 2007	Hint: look at the nfo file.
ewerton 18. Jan 2007	hehe =] okay okay. go to job @_@'

analyst's keygenning4newbies Crackme 1

Download k4n.zip, 30 kb (password: crackmes.de)
Browse contents of k4n.zip

Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 24. Sep, 2002
Downloads: 4212

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Bonez92, published 01. jul, 2008; download (16 kb), password: crackmes.de or browse.

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Solutions

Solution by yar0n7, published 25. sep, 2002; download (56 kb), password: crackmes.de or browse.

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Anarchy2k3's CrackMe #1 - Easy Timers - By Anarchy2k3

Download CrackMe_#1_-_Easy_Timers_-_Anarchy2k3.zip, 266 kb (password: crackmes.de)
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This crackme is coded with Delphi 2009.

The verification routine use one or two timers ;-)

With a good debugger or little lucky it's very simple !

Have a good day !

Anarchy2k3 - July 2009

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 13. Jul, 2009
Downloads: 825

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Solutions

Solution by deurus, published 07. aug, 2009; download (375 kb), password: crackmes.de or browse.

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Solution by Vallani, published 01. aug, 2009; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

wolfhack 13. Jul 2009	I used ResHack to solve this
intruder 15. Jul 2009	lol, reshack. I patched it so it works with user:"Thom Collins" and pass "5694-5378". Can't figure out the rest >_>
DigitalAcid 16. Jul 2009	Did you use a DeDe Protection ? Because it doesn't disassemble in DeDe =(. I have looked at it with Olly and think I know what's going on, but cba to solve it.

Anasazi's Density

Download Density.zip, 7 kb (password: crackmes.de)
Browse contents of Density.zip

- Density, Lake'99

KeygenME/PatchME

Rules:

1. No rules, either patch it or keygen it.

Info:
- It's been a year since I released a crackme,
Density, released on my 19th birthday.

- Have fun.

] Anasazi / Lake'99
] WarpZone.se/update ( Give review if you want to. )

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 29. Apr, 2008
Downloads: 499

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Solutions

Solution by costy, published 02. may, 2008; download (110 kb), password: crackmes.de or browse.

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Discussion and comments

costy 30. Apr 2008	Happy Birtday Anasazy. I tried to find a valid serial but It's difficult so I patched it. Now I send the solution. Could you publish the source??
Anasazi Author 30. Apr 2008	Thank you, didn't thought it was going to get cracked that fast but I guess my next crackme must be alot harder lawl. Anyway, source will be available on my forum.
HMX0101 30. Apr 2008	@costy: its not so hard, just take a look to scanf and strcmp Apis ;) @Anazasi: H-Bday, enjoy your day ;)
costy 01. May 2008	I hope that your next crackme wont be too difficult. :-) I didn't understand the strcmp function so I changed the jump after strcmp. It always compares "%d" with "640".
Anasazi Author 02. May 2008	Are you at the right cmp? Didn't anyone have a problem with the anti olly-/ida system? :/ The serial output after the algorithm-/inline assembly is in unicode tho.
costy 02. May 2008	Anasazi... I was at the right cmp. Infact I wrote a solution and It was approved. The anti-debug sistem isn't a problem but I can't understand the cmp. So I patched it. I hope you will publish the source. Why isn't your forum in your profile?
Anasazi Author 02. May 2008	Ah, I see. Sorry lol. nice shit, source will be published in 5 sec.
HMX0101 03. May 2008	Anasazi, do you test my keygen?.. it works? =S
costy 03. May 2008	I can not find the source in your forum. So I can't improve my skills. Really BAD.
Anasazi Author 03. May 2008	lol, costy, it's released under WarpZone - Releases. You gotta become a member before you can see it, and don't forget to comment. @HMX, Ima check once I get back to my computer.

Anasazi's EAX-56

Download EAX-56.zip, 7 kb (password: crackmes.de)
Browse contents of EAX-56.zip

Time for another one, this one has been well coded and I hope
you enjoys it. It has a very special algorithm ;)

- No patching.

- No selfkeygenning.

- Solution = Tutorial + Keygen.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 19. Dec, 2006
Downloads: 439

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Solutions

Solution by DaBookshah, published 21. dec, 2006; download (36 kb), password: crackmes.de or browse.

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Discussion and comments

DaBookshah 21. Dec 2006	This is too easy for level 3. Also, divide by zero errors are a problem
DaBookshah 21. Dec 2006	Also, i should think the divide by zero errors would get more likely the longer the name-length. But I have done a keygen.
Anasazi Author 21. Dec 2006	Pretty nice, you gotta agree that the switch statement thing was a good idea? Hehe... Working on a new one.
DaBookshah 23. Dec 2006	You need to check for errors next time, and I thought the switch statement was weak, go with something more mathematical next time. Or maybe write one in asm.

Anasazi's Extremely Hard KeygenME

Download KeyGenME.zip, 5 kb (password: crackmes.de)
Browse contents of KeyGenME.zip

Extremely Hard Raw Coded KeygenME.

Rulez;
- No patching just make a valid keygen and a tutorial ;)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 04. Nov, 2006
Downloads: 859

Rating

Votes: 7
Crackme is quite bad.

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Solutions

Solution by costy, published 10. jul, 2008; download (151 kb), password: crackmes.de or browse.

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Discussion and comments

red477 04. Nov 2006	Is there something I missed? Just an api call to get some value and then a little algebra? Activated!
HMX0101 05. Nov 2006	This crackme must be level 1... because its damn easy...
Anasazi Author 06. Nov 2006	Sorry mates, I screwed on this one ;)
SaXoN 06. Nov 2006	Ah level 1, something for me :D
BaKaE 07. Nov 2006	I got an error code '6' whats wrong ?
Anasazi Author 07. Nov 2006	When you get the error?
BaKaE 08. Nov 2006	after typed a number length is equal (just numbers) and hit the check button same thing in smartcheck >> same error
Ank83 13. Nov 2006	This is a bad crackme. It;s not working for me. Overflow. Try declaring with long, not integer. Best Regards Ank83
ProTreeBrain 14. Nov 2006	I rather dont try to crack this. I got 3 error codes. Try repair this crackme and upload. It'll be better.
ProTreeBrain 14. Nov 2006	And again. I got another error. Please if you can upload the source code. I am notvery interest in Visual Basic, but I try repair it. Thanks.
Anasazi Author 17. Nov 2006	This one requires a C: drive. I'm making new better newbie crackmes.
Ebba 17. Nov 2006	lol.. hope you sucess on making great ones~ good luck ~
costy 09. Jul 2008	The Overflow error is only on some computers. I understand why and I have written a solution with a keygen and an explaination about the error. The crackme can't run on all computer.

Anasazi's Hawkeye

Download Hawkeye.zip, 820 kb (password: crackmes.de)
Browse contents of Hawkeye.zip

Hawkeye 2007
==========

Level: 3/10

Rulez:
- No selfgenerating
- No patching

Others:
Ok, this time I've put alot of effort on the system, hope you'll enjoy it.

Have phun.
// Anasazi

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 02. May, 2007
Downloads: 1364

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by Crosys, published 08. may, 2007; download (118 kb), password: crackmes.de or browse.

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Solution by profdracula, published 06. may, 2007; download (47 kb), password: crackmes.de or browse.

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Discussion and comments

Scortile 05. May 2007	Nice crackme. Too bad finding the correct serial is sooooo easy, and making a keygen for this one would basically mean copy a part of the code and display serial instead of bad boy message.
Anasazi Author 05. May 2007	Thx, yeah, but that would be selfgenning which isn't allowed ;)
HMX0101 05. May 2007	Fun part is knowing which variables you need to put in keygen, because algo is simple ;P Anyway, i'm waiting for a more harder and interesting challenge from you :)
Anasazi Author 05. May 2007	A'right, but they're getting harder aren't they? :P I don't like implementing done algos like RSA/MD5/SHA or such, I wanna code Ã©m myself =) Next one will definately be alot harder.
profdracula 06. May 2007	There are total 14-variables to be put, mostly init-to-0 and a variable contains constant-value used in key. Anyway, keygen submitted 3-days ago, still waiting for being accepted.

Anasazi's SuperSerialMe

Download Super.Serialme-2007.zip, 130 kb (password: crackmes.de)
Browse contents of Super.Serialme-2007.zip

Super Serial Me 2007 - Anasazi
This is an advanced serialme created by Ananas.
- Rulez;

- No rulez, just crack it :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 15. Aug, 2007
Downloads: 1263

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Solutions

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Discussion and comments

ZeroCoder 08. Feb 2008	sux serial: 1024 and crackme starts to press many keys ps: cmp [dec2hex(serial)],400h

Anasazi's Uncrackable

Download Uncrackable.zip, 3 kb (password: crackmes.de)
Browse contents of Uncrackable.zip

This one is written in pure VB6, crack this and you're really good ^^

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: (Visual) Basic

Published: 23. Oct, 2006
Downloads: 4458

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by fjlj, published 31. oct, 2006; download (3 kb), password: crackmes.de or browse.

fjlj has rated this crackme as boring crap.

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Discussion and comments

acroneshadow 16. Feb 2010	Yay that was fun! great work!

Anasazi's Verbatim

Download Verbatim.zip, 494 kb (password: crackmes.de)
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VERBATIM
-==========-

:: nFO

Rank.: 3/10
Lang.: C++
Coder: Anasazi

- Well coded KeygenME
- Took me some sweet time to
code it since I really put some
hard effort on coding it.
- It uses a really neat trick which I hope you won't notice

- Right Click To Minimize

:: Rules

- No patching
- Solution = Tutorial + Fully working KeyGen

:: End

Hope you'll enjoy it!
Please comment it, especially the GUI

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 02. Mar, 2007
Downloads: 616

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Solutions

Solution by Zirux, published 10. apr, 2007; download (488 kb), password: crackmes.de or browse.

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Solution by boonz, published 07. mar, 2007; download (35 kb), password: crackmes.de or browse.

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Discussion and comments

Crosys 02. Mar 2007	Level 3? Damn easy one...
Anasazi Author 03. Mar 2007	Then where's your solution? I hardly belive it's 'that' easy, and it's a 3/10 or a 2/9.
Crosys 03. Mar 2007	You better check ARTeam forum -> ;)
Anasazi Author 03. Mar 2007	Noes! You found it, hoped ya would'nt notice the trick I used, nice work =) Really like you keygens cuz of the music you put in Ã©m. <.<

andimonk's keygenme 1

Download amkgme1.zip, 130 kb (password: crackmes.de)
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name/serial (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 13. Sep, 2001
Downloads: 2696

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Solutions

Solution by figugegl, published 13. sep, 2001; download (14 kb), password: crackmes.de or browse.

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andrewl.us's Capriccio

Download capriccio.zip, 61 kb (password: crackmes.de)
Browse contents of capriccio.zip

=-----------------------------=

I present "CapRiCcio" keygenme.

Some example user/serial pairs:

crackmes.de - 7B58752389D0333E
numernia - 0B1080D35AC5C4D5
cyclops - 814D355DA7A1B5D1
abcdef - A906EDBA84A6D5AE

=-----------------------------=

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 03. Aug, 2009
Downloads: 627

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Vallani, published 07. aug, 2009; download (210 kb), password: crackmes.de or browse.

Vallani has rated this crackme as quite nice.

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Discussion and comments

papanyquiL 04. Aug 2009	Solved. I'll send in tut tomorrow. username - abcdef / password - A906EDBA84A6D5AE ;D
artif 04. Aug 2009	CapRiCcio 64 to reverse!
Vallani 05. Aug 2009	Impressive papanyquiL.^^ I've done the keygen but now I'm too tired to write the solution, so I think, because the author andrewl also post some, to post addational user/serial combos: andrewl: 879FD586E7E403A2 papanyquiL: 2EB59FC14E5374C4 Vallani: 67E851E7178F8419 And maybe a general hint for those, who want to solve it but don't know how: You've to go forward from the start, following the smooth path until you come to the precipice and you've also to go backward from the end and here, where only who searchs wil find the way, you go until you come to the other end of the precipice. Then you'll be able to build the bridge. That's sound like a riddle, doesn't it? :) Greetings Vallani
andrewl.us Moderator 05. Aug 2009	WOW Vallani WOW WOW! I couldn't keygen my own crackme this fast!! Sending PM!
obnoxious 05. Aug 2009	Lets get building that bridge ;) But theres a saying it requires considerable skill to build a bridge ******* ***** 8888/ ************ 8888 ************** 8888 \8888 8888 8888 8888 8888 8888 8888 8888 8888
obnoxious 05. Aug 2009	Damn my bridge diagram got screwed. ;)
simonzack Moderator 06. Aug 2009	lol crc did you get the inspiration from that last crc crackme? forgot what it was i only tried it today, cause i thought GF meant Galois field ... didn't dare try the crackme
andrewl.us Moderator 06. Aug 2009	Yes I was going to reveal it: It is sequel to push-the-pusher crackme by upb (made with his permission). I liked his idea so much it was worth extending: + 64-bit divider instead of 32-bit + serial modifies data never on endpoints Yes simonzack you are right about GF. A CRC just calculates which residue class (mod the CRC polynomial) that some input data is a member of! Anyways, it's solved now, with fast methods I didn't foresee!! No need to "bump" the thread any more. Something more difficult will come soon......
The So;X 08. Aug 2009	Once again u did it.... keep on :)

andrewl.us's Crackme #1

Download crackme1.zip, 1 kb (password: crackmes.de)
Browse contents of crackme1.zip

An easy crackme for fun. Just find the serial that displays "WINNER" message. Invalid serials will display "NOPE" message.

Compiled with visual studio - no superfluous libraries, no optimization.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 22. Feb, 2008
Downloads: 1331

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by Encrypto, published 24. feb, 2008; download (2264 kb), password: crackmes.de or browse.

Encrypto has rated this crackme as boring crap.

Solution by Iñaki Viggers, published 24. feb, 2008; download (2 kb), password: crackmes.de or browse.

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Solution by DigitalAcid, published 24. feb, 2008; download (3 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

0xdie 22. Feb 2008	Well, man. I've had a problem with your crackme. When i click [X] to close, it's not exit =.=". Did you forgot calling ExitProcess API in your program?
andrewl.us Moderator 22. Feb 2008	Hey oxdie, sorry that it won't close. I should have tested it on more machines. It works on my XP 32-bit machine. Anybody else having problems?
0xdie 22. Feb 2008	Sorry, with my bad English i couldn't say more .But I mean that when i click [X], the dialog is closed but the process still there. You can check with Task Manager or Process Explorer or something else...
DigitalAcid 22. Feb 2008	No problems here, got xp sp 2.
0xdie 23. Feb 2008	Yeah, i've tested in virtual machine with xp sp2 and it 's normal :D. But why i've problems in real machine? Of course, i use xp sp2 (32-bit) :(. Sorry about this :(.
noukeys 23. Feb 2008	I've not problems. It's tooeasy. Solved in 30 sec.
cli3nt 23. Feb 2008	Work fine in win xp sp2, ia32. It's really easy one and that's for sure since I haven't crack anything for almost 1,5 year and this was easy for n00b like me :)
KpocoboK 24. Feb 2008	Sorry im kinda new if i nop some code its a bad solution?
KpocoboK 24. Feb 2008	p.s: crackme works fine on my vista 32 (no procces problem as 0xdie has)
cli3nt 24. Feb 2008	KpocoboK: It depends but generally Tutte le strade portano a Roma ;)
ishikawa 24. Feb 2008	Works fine, winxp with sp2. Very easy.
The So;X 24. Feb 2008	Nice Move U Got
Encrypto 24. Feb 2008	ive given my video tut in. :)
andrewl.us Moderator 24. Feb 2008	Nice work you guys :) I especially liked the video tutorial Encrypto :) Yes it was easy, but that was the point, hope you enjoyed!
Sinok 29. Feb 2008	Very nice crackme :) Maybe I'll post a solution.. Good job andrewl.
Sinok 29. Feb 2008	Posted my solution, hope moderators will accept it :)
Sinok 04. Mar 2008	I got rejected :o
MulleDK13 09. Jun 2008	Mine doesn't shut either.. The dialog disappears, but crackme1.exe keeps running in the task manager. System: Windows Vista Home Premium 32 Bit
Toxide 17. Sep 2008	An easy one, but nevertheless a fun one. I was actually looking for an algo, for making a keygen :') Should've read the description better hehe. Vista Home Premium 32bit, no running process after closing the CrackMe!
evaboy 18. Apr 2014	Serial:8272369 Good crackme.
aldeid 05. Dec 2015	My solution posted here: https://www.aldeid.com/wiki/Solution-andrewl-us-Crackme-1
andrewl.us Moderator 10. Dec 2015	aldeid: the goal of this site is to collect solutions HERE, please submit for archival reasons

andrewl.us's Crackme #2

Download crackme2.zip, 1 kb (password: crackmes.de)
Browse contents of crackme2.zip

Another simple one for fun - find the the only valid serial.

Compiled small with no extra library and no optimization.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 22. Feb, 2008
Downloads: 1254

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by hound, published 24. feb, 2008; download (2 kb), password: crackmes.de or browse.

hound has rated this crackme as boring crap.

Solution by DigitalAcid, published 24. feb, 2008; download (2 kb), password: crackmes.de or browse.

DigitalAcid has not rated this crackme yet.

Solution by noukeys, published 24. feb, 2008; download (1 kb), password: crackmes.de or browse.

noukeys has rated this crackme as boring.

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Discussion and comments

noukeys 23. Feb 2008	To easy, i solved in 1 minute.
-Lord Virus- 23. Feb 2008	Wow. You must be master.! man...:))
synak 24. Feb 2008	Interesting valid serial. Not my thing but that's OK. :) Thanks for the quick & easy crackme.
KpocoboK 25. Feb 2008	Why i cant vote? Anyway i like it. Hope to see more hard next.
MulleDK13 02. Mar 2008	Are there any cracking tutorials for stuff like this... I programme a lot, but don't have much knowledge on cracking or reverse engineering.
DigitalAcid 03. Mar 2008	Don't want to spam or anything, but lena151 has a nice 40 part tutorial on tuts4you.
Gamer 04. Mar 2008	I tried to crack this crackme with those tutorials, but I got stuck on how to get further at some points, I don't know what to do to get at the next page displayed. If anyone could make a video or a more detailed solution, I'd be very thankful.
DigitalAcid 04. Mar 2008	Practice makes perfect. Maybe try some other ones first.
Muns 28. Mar 2008	Yeh, you get the hang of how things work after seeing it a few times. Don't let it dishearten you :). thanks for crackme, done in under 5 mins.

andrewl.us's Russian Dolls

Download rdolls.zip, 107 kb (password: crackmes.de)
Browse contents of rdolls.zip

"Russian Dolls" CrackME

You will quickly find good boy and bad boy message.

The decision is based on one call. No decoys.

The call is to the "Russian Dolls" verification function.
(Russian dolls are those dolls where there's like one inside
another, and one inside that, and so on...)

You'll quickly see the similarity of how this verification
function executes and the dolls that the crackme name refers
to.

Write a keygen and a tutorial. I can think of a few ways to make this protection much nastier, let me know your ideas after you solve it.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 28. May, 2008
Downloads: 961

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by red477, published 13. mar, 2008; download (6 kb), password: crackmes.de or browse.

red477 has rated this crackme as quite nice.

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Discussion and comments

DigitalAcid 01. Mar 2008	Oh man, this crackme seemed to be hard (longest decryption routine i have ever seen O.o), but i easily found a serial trough trial and error. I don't know if it was your intention to be solved like that. Could have made a bruteforce loop, but i bet that would have taken longer ;). Will write a quick tutorial.
andrewl.us Moderator 02. Mar 2008	DigitalAcid: dang, if a key can be found by trial and error then I made some bad assumptions and didn't test enough... would you mind messaging me your key and letting me check it out?
Sinok 02. Mar 2008	OMG the decryption routine is so long, and in the end it crashed o.0 I'll look into it later o.0
Sinok 02. Mar 2008	And btw, I guess this is a loop for(int i=0;i<100;i++) CheckIfPasswordIsRight(); Yeah, that WOULD be nasty.
aMiGo 03. Mar 2008	I've found the smallest dolly. Hehe.. 2Sinok: a bit more complicated: int correctTable[] = {0,0,0,0,0,0,0,0}; for (int i = 0; i <= 0x600; ++i) { if (rand()%2) { int k = rand() % 8; if (isCorrect(serial[k], k)) { correctTable[k] = 1; } } else { if (false) { ..... } } } if (correctTable == {1,1,1,1,1,1,1,1}) MessageBox(goodguy); else MessageBox(badguy);
Sinok 04. Mar 2008	Yeah sorry I had something else in mind ;x
DigitalAcid 14. Mar 2008	No offense, but red477's keygen only uses 2 valid serials to make a combination wich results in a valid serial. However, there is at least 1 more valid serial , for example: daaCaebb Ps: the russian dolls are called matrousjka or matroushka =).
Ox87k 14. Mar 2008	@DigitalAcid: For me your serial "daaCaebb" doesn't work. And for the name of russian dolls take a look here: http://commons.wikimedia.org/wiki/Matryoshka Russian: Матрёшка, Матрешка English: Matryoshka
Sinok 16. Mar 2008	I guess DigitalAcid is russian, I know russian too and it's Matrushka, english translation is no good here lol
DigitalAcid 16. Mar 2008	No, i'm not russian =). I just knew the word. There was a tv serie called matrousjka's here. (http://fotos.marktplaats.nl/kopen/d/52/2RLw/ynHpXLxaQErsaYzdg==.jpg) Anyway, can somebody try that key ? It works for me and i didn't patch or anything.
andrewl.us Moderator 16. Mar 2008	red477's solution is more than sufficient - and it generates all 256 possible intended keys. I was impressed by the use of IDA script (must learn it myself!) I couldn't get "daaCaebb" to work. If there are keys outside of the intended 256 size set, please let me know what they are as I want to see where I went wrong.
DigitalAcid 18. Mar 2008	Actually, i started from aaaaaaaa and then changed 1 digit at a time... So maybe there was still a non-zero value somewhere instead of a 0.
alpha-rhythm 25. Mar 2008	I checked all the possible combinations - I wrote a small C++ program to decrypt and track all the possible keys - and I didi not find ahything except for known 2 keys.
DigitalAcid 29. May 2008	Has this crackme been updated ? Because it shows in the recent submissions...
neo_40 29. May 2008	REALLY EASY DON'T KNOW WHY YOU GAVE IT LEVEL 3
obnoxious 30. May 2008	@neo_40 if it were that easy how about you post a tutorial n a keygen!!!!!!!!!!!!

andrewl.us's SDDecoder Junior

Download sddjr.zip, 51 kb (password: crackmes.de)
Browse contents of sddjr.zip

SDDecoder keygenme by gbe32241 is a truly amazing work, worth anybody's examination.

In this knock-off, the strengthening factors are removed, namely:

- the input and output transforms are separated from the core function
- the key size is reduced from 128 bits to 64 bits
- some other minor simplifications

Here is a list of example codes.

0B9406A6A5CF8D68
7C2E3DC7A9357094
04FEB466BEDCDB92
21E55E6A6B309F70
A8FAC8E4DF56C998
D597329D34D0ED3A
33D0A0EA1092124B
28AC66DD28697C52
1E380939AF1BF545
4FC1636FB7EEAFB0
93B2C52E2B77BD8F

Can you keygen the rest?

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 09. Sep, 2009
Downloads: 587

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Solutions

Solution by Numernia, published 25. nov, 2009; download (152 kb), password: crackmes.de or browse.

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Discussion and comments

z1hye 05. Oct 2009	F365E2149BEA87F1 This is a key for for signature 0x0DEAD Nice crackme :) Hf.

andrewl.us's SDDecoder Junior v2

Download SDD_JR_V2.zip, 162 kb (password: crackmes.de)
Browse contents of SDD_JR_V2.zip

In this sequel to SDDecoder Jr. I've tried to find a
median between no security and full security for the
sake of study.

Included is full source code for the license scheme
kit used to produce these challenges (see .\SDD64\*).

challenge1 has only an input transformation

valid (but blacklisted) keys:

F4ED8D55792448DF (id:3)
65D58950D8AFE39D (id:4)
A8DED2168D7FCE7F (id:5)
2445784633EDF482 (id:6)

challenge2.exe has only an output transformation

valid (but blacklisted) keys:

2BAB59703A1E1199 (id:2)
A780FC96612C92EE (id:5)
776959450C0B4538 (id:6)
0BF10745067805FA (id:7)

Special greets to fellow crackmes.de mods, especially Swedish boy!

MODERATOR NOTES (jan13_2010): level reduced 5->2 since attack details made public

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 08. Dec, 2009
Downloads: 519

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Solutions

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Discussion and comments

Dionosis
04. Jan 2010

Hi andrewl,

I'm just looking at your challenge and... It's an original one but it looks very interesting :)

However I think there is a little error in Challenge 1 files (maybe "public_key.h") beacuse when I compile it with VS9 I don't obtain the same decoded key than with the provided decoder.exe.
I tryed it twice.
Challenge 2 is working fine.

Maybe I'm doing something wrong and it's not a real problem for the process understanding, but it's impossible to make a valid keygen in this configuration.

However, I'm a newbie but I'll try to understand it.

andrewl.us
Moderator
05. Jan 2010

Numernia Moderator 13. Sep 2008	a great keygenme, thank you
simonzack Moderator 14. Sep 2008	does the characters have to be typable?
andrewl.us Moderator 14. Sep 2008	yes, only 7-bit ascii characters
cyclops Moderator 15. Sep 2008	Great code :) Nice piece of GFX and c00l code! Nice one Andrew!
andrewl.us Moderator 15. Sep 2008	Thanks dudes! Too bad Numernia had to solve it so fast :>
artif 28. Sep 2008	nice andrewl.us ;) keep up the good work
papanyquiL 27. May 2009	awesome code :P look forward to seeing more
ShadeS_07 18. Jun 2009	I have a problem, when I try to run the program it says: "UPSKiRT.exe has encountered a problem and needs to close. We are sorry for the inconvenience." How can I run the program peepz? Thanks... :)
daemon2 26. Dec 2009	Looking good, will try this one out when I get home. By the way, your site is down.

AndSoOn's AndSoOn_Crackme1

Download AndSoOn_Crackme1.zip, 5 kb (password: crackmes.de)
Browse contents of AndSoOn_Crackme1.zip

This crackme was written with Turbo PASCAL :) make a keygen and send a sol tu me

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: Unspecified/other

Published: 19. Aug, 2004
Downloads: 1020

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Solutions

Solution by Oorja-HalT, published 23. aug, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by kao, published 23. aug, 2004; download (19 kb), password: crackmes.de or browse.

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Discussion and comments

AndT's AndT's Crackme#3

Download crackme_#3.zip, 22 kb (password: crackmes.de)
Browse contents of crackme_#3.zip

The target is to get "GOOD BOY :)" on the screen...
no patching..

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 23. Oct, 2008
Downloads: 444

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Discussion and comments

AndT Author 26. Oct 2008	no solution here? :)
Zaphod 29. Oct 2008	I'm trying, but no luck so far :(
AndT Author 29. Oct 2008	but it is possible..
DigitalAcid 30. Oct 2008	I got it to say "HSVF$>F`(B-" on the screen after entering some username/password and patching a couple of jumps :). But I don't have much time to try to solve it. Shouldn't be too hard, I guess ;).
Zaphod 30. Oct 2008	DigitalAcid, it's probably harder than you think :) "HSVF$>F`(B-" ( or some other chars ) are what your serial is changed into. Then I assume something happens further on with these chars, but I cannot find out what.
DigitalAcid 31. Oct 2008	=> The target is to get "GOOD BOY :)" on the screen... Now, count the chars between quotes :P.

AndT's AndT's Crackme #1

Download crackme.zip, 298 kb (password: crackmes.de)
Browse contents of crackme.zip

my first tricky crackme

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 31. Jul, 2008
Downloads: 530

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Solutions

Solution by br0ken, published 03. aug, 2008; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

starlight 01. Aug 2008	If I make the process shows "It works!" .Is it means that I have cracked successful?
br0ken 01. Aug 2008	I have the same question as Starlight.
AndT Author 01. Aug 2008	Then is it cracked

_Andy_'s _Andy_ KeygenMe

Download CrackMe.zip, 281 kb (password: crackmes.de)
Browse contents of CrackMe.zip

A simple KeygenMe written in AutoIt3.
You must find a valid username and key.
Good luck.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 11. Sep, 2009
Downloads: 1345

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by deurus, published 14. sep, 2009; download (1194 kb), password: crackmes.de or browse.

deurus has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

deurus 12. Sep 2009	Example: deurus SURUED Good job Andy! i enjoy so much with this
The So;X 13. Sep 2009	its packed with UPX
deurus 13. Sep 2009	Yes, because Autoit compiler by default pack with upx
_Andy_ Author 14. Sep 2009	It would be nice to share with us your solution.
yaav 19. Sep 2009	Why when i unpack it and fix the imports i got MessageBox with message like Unable to open script file.
_pusher_ 19. Sep 2009	yaav: script is the overlay :) so just copy the overlay and put it at the end of your unpacked file.
yaav 19. Sep 2009	agh... sorry i am noob i dont understand what is the "overlay"
Zaphod 22. Sep 2009	pusher, when I use "myExeToAut" like deurus says I get the scriptfile, "CrackMe.au3". So far so good. But when I unpack the CrackMe (which is packed with UPX) and append CrackMe.au3 to this unpacked file, it still doesn't work. It still says "Unable to open script file". What am I doing wrong? And would it be possible to solve the crackme using only Olly and not myExeToAut?
deurus 26. Sep 2009	First unpack with upxripper or similar and then get the script
Zaphod 26. Sep 2009	But I have the script, it's "CrackMe.au3". I got it directly using "myExeToAut" which unpacks and saves the script. What I don't understand is pusher's comment: "so just copy the overlay and put it at the end of your unpacked file." I don't know what that is supposed to do :(
_pusher_ 03. Jan 2010	Sorry, i missed the comment. but my guess is that you are copying the overlay from the wrong place, or its unpacked differently :) but unpack it with upx -d and overlay would follow.

anemyx's RegMe

Download rEGme.zip, 205 kb (password: crackmes.de)
Browse contents of rEGme.zip

No patching!!! Find Valide key!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 07. Nov, 2009
Downloads: 319

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

crackerlnn 08. Nov 2009	key:H7E^D@SP i try
anemyx Author 08. Nov 2009	Gt! it will be so easy )!

Ank83's KeyGenMe

Download keygenme.zip, 5 kb (password: crackmes.de)
Browse contents of keygenme.zip

Hi !

This KeyGenMe is written in Turbo Pascal 7.0. It's packed with UPX.
The keygen will be trycky (i think) becase I implemented recursion.
The main thing is that I want to show how recursion can be nasty when
you are trying to reverse it.

Hope you will enjoy reverseing it !
Best Regard
Ank83

P.S. This CrackMe is dedicated to my wife Irena and my daughter Mila.

Difficulty: 3 - Getting harder
Platform: DOS
Language: Turbo Pascal

Published: 30. Jan, 2006
Downloads: 621

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Solutions

Solution by Kerberos, published 01. feb, 2006; download (51 kb), password: crackmes.de or browse.

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Ank83's KeyGenMe #2

Download keygenme2byank83.zip, 32 kb (password: crackmes.de)
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Hi !

This crackme is a product of 10 minutes writting.
It's only for newbies, becase it's damn to easy.
I promise to the advanced crackers that I will write another one !
It will be interesting for the newbies becase it is just simple math.

Rules:
1. no patching and no selfkeygen
2. write a keygen and a soluton

Best Regards and Have A Nice Cracking Day !
Ank83

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 26. Feb, 2006
Downloads: 1159

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Solutions

Solution by l0calh0st, published 03. mar, 2006; download (8 kb), password: crackmes.de or browse.

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Solution by NexusC, published 03. mar, 2006; download (145 kb), password: crackmes.de or browse.

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Solution by Ox87k, published 28. feb, 2006; download (40 kb), password: crackmes.de or browse.

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Solution by HMX0101, published 03. mar, 2006; download (23 kb), password: crackmes.de or browse.

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Solution by Napalm, published 03. mar, 2006; download (12 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

SaXoN 26. Feb 2006	Hey thanks pal... I'm a total noob myself, i've got all the basics and im going to see if i can understand a name/serial routine =) Nice with new stuff, keep it up ;) SAx
HMX0101 26. Feb 2006	Nice crackme, Ank83. Good Job!
Ox87k 26. Feb 2006	it's very easy! =) thank ank ;)
HMX0101 26. Feb 2006	I'm waiting the next crackme :D
l0calh0st 26. Feb 2006	Solved it ;) Thanks Ank83..Easy enough for newbies like me ;)
Kerberos 26. Feb 2006	Yep, nice one Ank83 ... I'm looking forward to your KeyGenMe#3
Ank83 Author 27. Feb 2006	Hi I'm glad you like it. I would like to say hello and thanks to all moderators and creators of crackme.de. This web page is simply perfection. The moderators and all the members are of lot of help here. I leard a lot of thinks wich I didn't know. And I gave some knolege to some newbies members. What i actually wanna say is THANKS to everyone that is here and are active. Regards Ank83
CuTedEvil 03. Mar 2006	more than enough solutions for this crackme. Submission is now closed =)
Krabby Krap 06. Oct 2007	This is definitely my favorite crackme, because it's my first =) I've solved others but thought I'd post this before I head on to more crackmes. Crakemes.ed rules!!!
fangrenxing 28. Apr, 04:47	실례 ID : 100 serial : 40211 알고리듬 ++ID; ID = 2; --ID; ID = ID; for ( i = 1; i < 20; ++i ) ID -= i; serial = ID 흥, 째보 코 빨아먹기로군.

Ank83's Pyramid

Download pyramid_by_ank83.zip, 13 kb (password: crackmes.de)
Browse contents of pyramid_by_ank83.zip

Hi !

Pyramid is all in one crack me ! In it you have unpacking, fishing
a serial, enableing buttons, checkbox combination, keyfile, NAG,
keygenerator, OllyDbg protection, patching e.t.c. It's full of trick
and traps, so beware ! The CrackMe will misslead you all the time
so dont belive anything u see ! I dont think that you will crack it
as fast as i wrote it !

Task: Find the serial in stage 1, checkbox combination in stage 2,
reconstruc the keyfile in stage 3, make keygen for stage 4 ! Do all
this without patching, and everything else you can patch !

Hope you will enjoy cracking the Pyramid !
Best Regard
Ank

P.S. This CrackMe is dedicated for my newly born dauther - Mila !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 23. Jan, 2006
Downloads: 1119

Rating

Votes: 3
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Solutions

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Discussion and comments

Ank83 Author 18. Dec 2005	Does anyone have a solution for this crackme ?
konstAnt 20. Dec 2005	That's a hang work man...???? Writing a solution for a crackme like this which has that many feature is a hanging up task.. :P
madlogik 20. Dec 2005	If anyone is patient enough, I would like to know how to enable buttons like the check button here... (step1 ) thanks - madlogik(AT)gmail.com -
madlogik 20. Dec 2005	... how to find the ENABLE/DISABLE CONTROL .. ? I crtl+b to find Check I dont know witch one to (modify byte) from 00 to 01 to enable the button.. I dont really get the logic to find the right one.. thanks
deroko 20. Dec 2005	open it VBdecompiler and locate manually what to enable in exe itself or use Window Enabler to enable buttons/forms...
Ank83 Author 20. Dec 2005	Hint: REMEMBER this: Open a vb application in some HEX editor, and find the sting that is caption for that button, checkbox e.t.c. Go to the end of the caption, and start counting ! The 24th byte will be for for enableing that button ! Ex.: 59 6F 75 20 64 69 64 20 69 74 3F 3F 3F 0 0 0 4 F 8 0 7 C 8 0 A 6 F 0 9 7 7 0 1 0 8 0 {0} Y o u d i d i t ? ? ? 1 2 3 4 5 6 7 8 9 101112131415161718192021222324 0 - disabled and 1 - enabled
Absolom1 21. Dec 2005	madlokik, for buttons once you have finded the label ("Check" in this case) you have to count eleven rows and edit the 00 you encountered there with a 01. This is only for Buttons... for Textbox, you have to change with FF, I think... but IÂ´m not sure now...
konstAnt 21. Dec 2005	Yah I've enabled the buton and enabled the button and perhaps found the first level password... But it doesn't show any other box???
Ank83 Author 21. Dec 2005	konstAnt here's some help ! Open the application in VBDecopmiler and from there make vpb pjocet and open it to see what is hidden(invisible) and what is the secret trick in level one !
Ank83 Author 21. Dec 2005	Does anyone passed stage one, yet ? Or do you need some help ?
konstAnt 22. Dec 2005	Ooops Z...Z... Was sleeping that time
deroko 22. Dec 2005	one q on s2... you check if 2nd button checked(1) if not __vbaEnd, and later you check for (0) unchacked, if checked __vbaEnd... i'm confused... 00406A44 if not 1 -> __vbaEnd and again: 00406E9C 66:83BD 38FFFFF>CMP WORD PTR [EBP-C8],0 00406EA4 0F94C3 SETE BL but this time for 0... if not 0(unchecked) ->> __vbaEnd
Ank83 Author 22. Dec 2005	That is the part where you have to patch ! The thing is that that is the part to confuse you ! The code is checking a checkbox from stage 2 not from stage 1. Just patch it ! This was put here to confuse you ! This message will be deleted after two days so we dont show this hint to future cracker ! Have a nice day !
Ank83 Author 22. Dec 2005	In other word that is a NAG ! A msgBox that will always popup becase the condition of poping up will always be true !
Ank83 Author 23. Dec 2005	Any progress, anyone ? I think that the webmaster's should upgrade the level of difficulty of my crackme ?! A least 3th ! :)
windayjiang 24. Dec 2005	QUOTE:Hint: REMEMBER this: Open a vb application in some HEX editor, and find the sting that is caption for that button, checkbox e.t.c. Go to the end of the caption, and start counting ! The 24th byte will be for for enableing that button ! Ex.: 59 6F 75 20 64 69 64 20 69 74 3F 3F 3F 0 0 0 4 F 8 0 7 C 8 0 A 6 F 0 9 7 7 0 1 0 8 0 {0} Y o u d i d i t ? ? ? 1 2 3 4 5 6 7 8 9 101112131415161718192021222324 0 - disabled and 1 - enabled I think it's not right like you said, I tested my app wrote with VB6.0: app1 button1 enable=true app2 button1 enable=false both same project, but save as two different app open them with WINHEX, it has 1300 places different and I try to use your way to enable the button, nothing done! why?
windayjiang 24. Dec 2005	Yah, I tested it will done like this: Check 1 2 3 4 5 6 7 8 9 A B C .......... position C changed 01 can work, is that right?
Ank83 Author 24. Dec 2005	Try patching the 24 bit (12th byte) in each of the application from 00 to 01 or from 01 to 00 ! You will see that if the button was enabled it becames disabled, or if the button was disabled than becames enabled ! Remember the 12th byte after the end of the caption of that button ! This is a case in all my written VB application, and all other that I try ! I dont know what should be the problem with yours ! I'm not 100 % sure that this is a case in all VB aplications, but I'm 100 % sure that this is the case is mine crackme ! :)
windayjiang 25. Dec 2005	YES,I have already enable the OBJECT in stage1, but how can I type the "A0"? It always be a space. And if I edited in the dump, I can go to the stage2, it will tell me that something forget in stage1. I am sure I have already checked the checkbox. Anything else?:)
deroko 25. Dec 2005	write dialog that will print 'A0'+serial+'A0' and c/p from dialog to crackme =)
Ank83 Author 25. Dec 2005	This will be the last hint for level one ! A0 is ALT+255 !
Ank83 Author 25. Dec 2005	in other words that is character that is similar to space !
konstAnt 26. Dec 2005	Nop that's not ... :X Space means (space) in dump but it is something different..
Ank83 Author 27. Dec 2005	Any one at level 3 or 4 ?
konstAnt 28. Dec 2005	I just passed level 1 :P
KLiZMA 28. Dec 2005	Used: PE Explorer, PEiD, VBReFormer 1 step [Unpacking] Put this crackme in PE Explorer and save it :) Whatta FuN? This tool unpacked crackme from UPX to generic VB app. New filesize 53,248 kb. 2 step [Enable-Disable] Put unpacked shit in VBReFormer and change PyramidS1 - VB.Form: Check1 - VB.CheckBox Visible False to True Command1 - VB.CommandButton Enabled False to True Text1 - VB.TextBox Enabled False to True Save app. with changed parameters. 3 step [You are THE BEST CRACKER IN THE WORLD] Run cracked app., press Check button and see ........ Nice work! message?????? Thatz all???? What trick, fun, hard???? He-he :))
Ank83 Author 28. Dec 2005	Dear KLiZMA what you've seen is the bad boy message ! The app has 4 stages ! But you're pretty close to passing stage one ! You enabled everything, you check the checkbox, all you need is the valid pass ! Hint: Do some reading in the dsscusion above, and i think you will find the valid pass, and the way to get it ! Have a nice cracking day !
Ank83 Author 28. Dec 2005	Keep going ! If some one needs hints, dont be shy and ask me !
windayjiang 29. Dec 2005	i still can't solve the A0 problem,shit!
BlackHawk 29. Dec 2005	i've unpacked , enabled all the thinks you can found in the 1st form but I still can't go trugh it... i can't use Olly because of the debugger protection, and i don't know how to disable it... ank83, i begin to hate you ^_^
Ank83 Author 29. Dec 2005	BlackHawk the OllyProtection is one of the most stupid protection that I can think of ! All you need to do in Olly is NOP the adress that is calling that protection ! NOP everything that is calling the procedure of OllyProtection ! It will work belive me ! Dont forget the hidden check box ! Have a nice day !
BlackHawk 29. Dec 2005	i've made visible the ceck box... now i'll wprk on the antidebugprotection... tnks
Ank83 Author 29. Dec 2005	windayjianq A0 is in HEX, in DEC that is 160 ! Find the character that is assingn to 160 ! I wrote a VB app to help you: Private Sub Form_Load() Dim a As String a = Chr(160) Text1.Text = a End Sub In the textbox you will get a character that is similar to space, but it's NOT ! So you can copy/paste it ! And at last here is the serial in stage one: ALT+255+"Ank Rulz"+ALT+255 ! Please tell me that you understand me !
HMX0101 29. Dec 2005	the anti-ollydbg trick, check if ollydbg.exe is running, you can change the name and bypass this protection
Ank83 Author 29. Dec 2005	That is one way ! And I think that that is the easyest way, Becase OllyProtection is a one procedure that is called from places all over the crackme, so if you alter that procedure, that string you solved the problem till the end of the crackme ! So open the crackme in Hex editor find the "OLLYDBG.EXE" string and change it to "OLLYDB1.EXE" ! HM0101 nice work !
Ank83 Author 29. Dec 2005	I think that the moderators should upgrade the difficulty level of this crackme, at least 3 ! :)
Ank83 Author 31. Dec 2005	Happy New Year ! I hope you will crack my crackme in the next year ! :)
Ank83 Author 03. Jan 2006	Waiting solution ! Does anyone work on this or you all gave up ? :P Come on people i will help as much as I can !
EsKiMo 22. Jan 2006	Just reached level 3! This is a very good crackme. It has lots tricks/code that need to be NOPed or patched to work in the right way. Good work Ank83 :)
Ank83 Author 22. Jan 2006	Thanks EsKiMo ! If you need some help don't hasitate to write me. Regards Ank83
HMX0101 24. Jan 2006	the 2nd stage its a little harder, i can't get the correct combination of checkboxes, some hints?
hadicol 25. Jan 2006	Check out the 7 vbaObjSet functions in a row. The function immediately after vbaObjSet actually checks if the box is selected. I had to check each box and see which function responded to see what order they were in. I am on stage 3, stuck on the key file... and for the success message, what button do you mean enabled? "Next Stage" is already enabled! Should I just guess where to patch it to?
hadicol 25. Jan 2006	ok figured out keyfile (I was over-thinking it) now just need a magic patch?
Ank83 Author 26. Jan 2006	To see in what order they are you can use VB6Decomiler. Generate a VB Project and you will see. I think that that is the easyer way. I uploaded a new version of this crackme to make the level 3 easyer. So now, when you press Next Stage you will get NAG message and exit. In the code I implemented a procedure that call's the next and final stage. All you have to do is call that function (adress). Sorry for the late respond. Regards Ank83
HMX0101 15. Mar 2006	I have the correct combination of checkboxes but i need the string that compare the serial in the clipboard. This is a easy one, thank you Ank83 for this crackme, the solution for this crackme is coming soon...
Ank83 Author 15. Mar 2006	I think that the srerial include some special ascii characters (like. ATL+255 e.t.c.). It goes something like "CrAcKINg iS Co0L !", this is not the string, but it is similar to that. I will post it tomorow, becase I'm not home I don't have the source here. Best Regards Ank83
Ank83 Author 15. Mar 2006	HMX0101 did you found the string ? In case you did not found it, here it is: "Â CrAcking is Ã¿c0olÂ !" Regards Ank83
l0calh0st 15. Mar 2006	It seems Ank has to submit solution for his Crackme :)
Ank83 Author 15. Mar 2006	It seems like that ! It was my first crackme, so I wanted to be solved. That is why I give so much help. :)

AnonimoSer's AnonimoSer CrackMe I

Download crackme1.zip, 178 kb (password: crackmes.de)
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My first crackme.

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. Aug, 2002
Downloads: 3156

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Solutions

Solution by Exhuman, published 12. aug, 2002; download (1 kb), password: crackmes.de or browse.

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AnonimoSer's AnonimoSer CrackMe II

Download crackme2.zip, 179 kb (password: crackmes.de)
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My second crackme, like the first, but ...

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. Aug, 2002
Downloads: 2908

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Solutions

Solution by DaKneeMan, published 21. oct, 2003; download (1 kb), password: crackmes.de or browse.

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Solutions

Solution by Roma, published 30. sep, 2003; download (14 kb), password: crackmes.de or browse.

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Discussion and comments

apuromafo 16. Jul 2007	can not see the solution but .. the oep is 00474988 > $ 55 PUSH EBP
Shism 16. Jul 2007	There's nothing in the solution ??/
Shism 16. Jul 2007	Also crackme doesn't startup in my computer
apuromafo 16. Jul 2007	mine doesn't startup but in oep can dump and see iat cleaned..maybe the comparations do crash... but this is the oep 00474988 can see an push 00474988...go to. 00474988 and dump.. you see the encripted delphi..
Shism 17. Jul 2007	Yes, I see it. Thank you

AnonimoSer's Nirvana Crackme I

Download nirvana_crackme1.zip, 39 kb (password: crackmes.de)
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OH KURT COBAIN NO TE HUBIERAS MUERTO

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. Jan, 2003
Downloads: 2114

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Solutions

Solution by scarabee, published 25. feb, 2003; download (23 kb), password: crackmes.de or browse.

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anorganix's CrackMe #6 :: anorganix

Download CrackMe.6.anx.zip, 144 kb (password: crackmes.de)
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Hi all!
I bring you my latest CrackMe (#6). The goal is to find a valid serial for your name and then write a keygen + tutorial.

Please send comments and bug-reports to anorganix[at]gmail[dot].com.

Trcks: anti-debugging / code obfuscation / string encoding / custom packing

Have phun!

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 16. May, 2006
Downloads: 636

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Discussion and comments

kao 17. May 2006	I liked unpacking it - quite easy, but still enjoyable. Serial check can be found easily, but I am too lazy to do keygen. :P Would be nice getting source of this CM. After a decent tutorial is published, of course..

anorganix's CrackMe #8 :: anorganix

Download CrackMe.8.anorganix.zip, 30 kb (password: crackmes.de)
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Features:
* packed with home-brewed packer
* import table protection
* simple OEP protection + function hash +CRC
* customized MD5 for serial generation routine

Instructions:
* do not patch the registration routine
* write tutorial + CodeGen to recieve Delphi sources

anorganix@gmail.com
09.10.2006

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 09. Oct, 2006
Downloads: 840

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by Encrypto, published 27. mar, 2008; download (1533 kb), password: crackmes.de or browse.

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Solution by HMX0101, published 15. oct, 2006; download (24 kb), password: crackmes.de or browse.

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Discussion and comments

The french beginner 09. Oct 2006	good idea to set OEP as SEH.
ghostz 09. Oct 2006	Thank you for your help -The french beginner ;) I unpaked it and see the serial for my name. Olly clearly displays it. thx anorganix for this Nice Crackme :) @+
HMX0101 10. Oct 2006	You can fish and keygen it, without unpack ;)
ghostz 10. Oct 2006	How? you can give me some things please :)
The french beginner 10. Oct 2006	you just have to run the target in olly, and set bp on GetWindowTextA for example
ghostz 10. Oct 2006	Ok ! this method without unpacking the crackme Works! Thx Beginner!
EvOlUtIoN 10. Oct 2006	I don't understand why you don't want to unpack it, it is very simple and you can make a codegen in an easier way!
Encrypto 27. Mar 2008	I absolutely like this one. good packing and quite easy to unpack :D. also half decent algo. thank heavens the author said it had md5 lol. ;). thanks yet again.
DigitalAcid 27. Mar 2008	Nice crackme and nice solutions. Learned a little bit more again. PS: You can find OEP in an easier way: Line 0041C004 and 0041C048 both have the same push (basically that's the OEP) and line 0041C04D has a RET. PUSH + RET = JUMP ;). I couldn't step into those calls. Also, PEiD told what the OEP should be ;).

anorganix's KEYGEN.ME.5

Download CrackMe.5.anorganix.zip, 222 kb (password: crackmes.de)
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Rules:
patching the registration-routine is *not* allowed
a valid solution has to contain unpacked file + codegen + tutorial

Features:
anti-debugger tricks
special packing trick (UPX is just at the surface)
nice serial-generation routine

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 01. Feb, 2006
Downloads: 843

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Solutions

Solution by kao, published 13. feb, 2006; download (282 kb), password: crackmes.de or browse.

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Discussion and comments

anorganix Author 05. Feb 2006	Need some hints? Here is the first: "ANX" / "anx"
anorganix Author 06. Feb 2006	P.S: the above hint is usefull after unpacking :D
HMX0101 06. Feb 2006	The crackme has a section named ".anx", if is changed show a error, maybe this is the loader section :) If this is correct, tell me more hints, hehehe :)
Kerberos 06. Feb 2006	HMX0101: Your're close, but it's not loader section ... it's section with encoded file which is loaded into memory. But after saving this file after decoding I'm still unable to repair it's PE header :-/ (I think it's packed with UPX)
HMX0101 07. Feb 2006	yeah this is packed with UPX :)
Kerberos 07. Feb 2006	Yeah, but that "second" file is IMHO packed with UPX too :)
anorganix Author 07. Feb 2006	You are almost right guys... It's packed with a "home-brewed" packer that uses the UCL compression library (same used in UPX)... This is the second hint... :)
HMX0101 07. Feb 2006	uhhhm, the crackme uses some calls to WriteProcessMemory and CreateProcess, interesting...
HMX0101 07. Feb 2006	The compression library used maybe is the Delphi version of UCL: http://www.zeitungsjunge.de/delphi/ucl/index.htm :D
HMX0101 07. Feb 2006	This is a trap, the crackme is packed two times: 1: Packed with UPX 2: Packed with a modified version of UCL anorganix: You are cool!
anorganix Author 07. Feb 2006	Thx man! If you need more hints, just ask... :D
kao 09. Feb 2006	Unpacking took 15 minutes. Serial algo search and rippping - 30 minutes. Got fooled by certain trick.. ;) Thumbs up for Anorganix!
Kerberos 09. Feb 2006	Kao : I hope you're going to write a solution :)
HMX0101 09. Feb 2006	kao: please write the solution :D
l0calh0st 09. Feb 2006	How to unpack the file
kao 10. Feb 2006	Sorry guys, I am damn lazy... ;) If nobody writes a solution until Monday, I will write a tutorial + publish keygen sources in 100% Delphi. Not a single ASM line in there.. :))
anorganix Author 13. Feb 2006	@kao: Your solution is VERY well explained... You are a talented reverser! Cheers!
HMX0101 13. Feb 2006	kao: you are a very talented cracker, but a lazy person XD Sorry for my bad english

anorganix's KeygenMe #4 :: anorganix

Download CrackMe4_anorganix.zip, 344 kb (password: crackmes.de)
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* patching not allowed

* coded in Delphi7
* packed with NsPack
* write a KEYGEN to recieve the full-source code

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 03. Dec, 2005
Downloads: 1009

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Solutions

Solution by merker, published 10. dec, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by deroko, published 10. dec, 2005; download (223 kb), password: crackmes.de or browse.

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Discussion and comments

anorganix Author 06. Dec 2005	Need some hints? C'mon it's not so hard... :)
Immortal_One 06. Dec 2005	Crashes on W98se (blue-screen-of-death)
anorganix Author 06. Dec 2005	Hmm... didn't test it with 9x!

anorganix's UnlockMe :: anorganix

Download UnlockMe.zip, 180 kb (password: crackmes.de)
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* create a KEYGEN or find a valid "Unlock Code"
* patching is not allowed

o4.12.2oo5

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 07. Dec, 2005
Downloads: 1134

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Solutions

Solution by HMX0101, published 18. jan, 2007; download (19 kb), password: crackmes.de or browse.

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Discussion and comments

jB_ 07. Dec 2005	Really easy stuff, but I found it interesting, I don't know why. Maybe because of the template.
jB_ 18. Dec 2005	HMX0101 : THere are a lot of valid serials. The condition to resect is not very restrictive :)
konstAnt 20. Dec 2005	Is anyone going to give the solution???
anorganix Author 10. Jan 2006	Need some hints?
anorganix Author 11. Jan 2006	Unpacked the file? How about debugger detection? :)
HMX0101 11. Jan 2006	i have dumped the crackme and rebuilded the import table and eliminated the debugger detection, but i can't sniff the serial
TQN 16. Mar 2006	Solved it, it is really a interest crackme.
Krtko666 19. Jul 2006	can anyone help me because i'm new in this and when i tried to open file in delphi 7 created in delphi it only showed my something that couldn't be read

AntiPro's Fascist KeyGenMe #1

Download Fascist_KeyGenMe_#1.zip, 201 kb (password: crackmes.de)
Browse contents of Fascist_KeyGenMe_#1.zip

Objective of Fascist KeyGenMe #1 is obviously to keygen it, but finding one serial number is also accepted. Just be sure to mention how you found it.

You're on your own from here. Good luck!

Difficulty: 5 - Professional problem to solve
Platform: Windows 2000/XP only
Language: C/C++

Published: 03. Jun, 2006
Downloads: 730

Rating

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Discussion and comments

AntiPro Author 14. Sep 2006	Nobody? Come on, guys! :)
badmojo 14. Sep 2006	Do you really expect us to bruteforce 20^16?...
badmojo 14. Sep 2006	Actually my last post was incorrect, I mean 0x14^0x24. However I have a challenge for you. Post one of the 512 valid keys and I will give you the remaining! Shouldnt be a problem, right, since they're all independent? ;) Cheers
crp- 15. Sep 2006	heh, nobody broken blowfish yet ? ;)
badmojo 16. Sep 2006	I'm closeeeeeee!
badmojo 17. Sep 2006	Wooowhooooooooooo got it!!! Will post solution if there is interest. :) See, you can break blowfish! Cheers
crp- 17. Sep 2006	of course theres interest :)
Ox87k 17. Sep 2006	well, badmojo if u can write a good solution for us :)
badmojo 18. Sep 2006	I'll find some time over the next couple of days to write something on this. :)

AntiPro's KeyGenMe Bassez32

Download KeyGenMe_Bassez32.zip, 23 kb (password: crackmes.de)
Browse contents of KeyGenMe_Bassez32.zip

A tiny symmetric encryption algorithm (32bit input, 32bit output, 32bit key).

Objective is not to crack it but to write a keygen that works with any input/output/key combination.

Good luck!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 04. Sep, 2008
Downloads: 575

Rating

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Solutions

Solution by JoKa, published 08. sep, 2008; download (13 kb), password: crackmes.de or browse.

JoKa has rated this crackme as quite nice.

Solution by andrewl.us, published 08. sep, 2008; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

[xorolc] 05. Sep 2008	who the hell cares. Aren't we here to learn something and advance some protection ideas? Not be like I found this or that which has nothing to do with helping others? I'm not trying to be a jerk about it, but these kinds of posts are so useless. Look at me I'm first.
lgtngstk 07. Sep 2008	I'm not exactly clear on what you want in the keygen. Something which generates output from a input/key combination, key from input/output, input from key/output, or all of the above?
lgtngstk 08. Sep 2008	Okay, so is what you enter in the window the input or key? Otherwise, there is no way to figure this out.

antofik's VVM keygenme: level 1

Download VVMachine.zip, 5 kb (password: crackmes.de)
Browse contents of VVMachine.zip

A keygenme with a very simple checking algo, but realized at embded virtual machine (embded into another VM).

For more information see readme.txt

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Assembler

Published: 08. Apr, 2008
Downloads: 507

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by Babo0n, published 13. apr, 2008; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

Babo0n 13. Apr 2008	Interesting Crack-me ! I've finished to studie all the VMs and I'm coding a keygen I think it could be more interesting with junk and a best utilisation of all the opcodes of your first VM (I hope my bad english will not hurt your eyes ;) )
Babo0n 13. Apr 2008	(PS : your TLS implementation is bad and crash the keygen-me on my second computer)
antofik Author 14. Apr 2008	Well, Babo0n, good work :-) As for TLS, yeah, it could be. Because I was a bit in hurry when added that callback, and probably have easily missed something. Well, ought to be more attentive next time:-). And what about junk - really I don't like to make a jumble from code. Firstly because the main idea was not to make you sit and spit upon the awful code :-) Understanding the VM is a routine, thus I don't want to do it more boring for you. Well, next level VMachines will be much more complicated and, hope, interesting.
hinte! 15. Aug 2009	nice and simple name: hinte^2oo9 serial: 4vxEB;85(0-'$!( sum(name) == sum(serial (+-^\|&+) Russia) && sum(name) == sum(serial) + 1 && sum_div(name) == sum_div(serial) probably there is no keygen that generates nice looking serials

antonone_'s antonone\'s crackme v0.666

Download crackme_v0666.zip, 32 kb (password: crackmes.de)
Browse contents of crackme_v0666.zip

Hi :]. This is my second crackme I decided
to release. It\'s free of cryptographic stuff
of any kind, just a few math tricks that
everybody should handle ;). Everything can
be reversed (i made a working keygen myself).

The goal is to make a working keygen.

There\'s no anti-disasm nor anti-debug stuff,
so patching won\'t be necessary.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 10. Sep, 2004
Downloads: 579

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Solutions

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blub 26. Dec 2012	very nice puzzle, thanks
[Wizzer] 27. Dec 2012	Solved, though brute forced with 4 constraints, takes about 40 seconds to get a key (single key is the only solution), but I think CuTedEvil's solution with randomization is pretty cool :)

ap0x's RLPack - New Year unpackme

Download Challange.zip, 39 kb (password: crackmes.de)
Browse contents of Challange.zip

RLPack - New Year challenge

This is the official RLPack unpackme. Unpacking is considered correct if the unpacked Unpack.exe can unpack crackme.fsg.exe. You can not add ap0x unpacking engine .dll files to unpackme to make it work. You can only use things located inside the challenge archive. Due to the fact that Unpack.exe uses psapi.dll challenge will work only on NT systems.
The first one to unpack the official unpackme will get RLPack Full Edition Personal license!

Contact email: ap0x.rce@gmail.com

Happy cracking ;)

Difficulty: 5 - Professional problem to solve
Platform: Windows 2000/XP only
Language: Assembler

Published: 31. Dec, 2006
Downloads: 752

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by haggar, published 03. jan, 2007; download (60 kb), password: crackmes.de or browse.

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Discussion and comments

Bswap 02. Jan 2007	Solved it. Look if apox's likes it.....
ap0x Author 02. Jan 2007	Just a note... You have to unpack file Unpack.exe, that file (unpacked one) must remain functional and able to unpack crackme.fsg.exe
ap0x Author 05. Jan 2007	Great work haggar

apuromafo's Apuro little check Serialme #1 vb.net 4.5

Download Tarea_3_framework3.5.zip, 13 kb (password: crackmes.de)
Browse contents of Tarea_3_framework3.5.zip

Rules: Found the correct Serial, and create a mini kg in the lenguage as you can

Coded in vb.net VS2012 Framework 4.5

Best Regards Apuromafo

hint:
good Boy=Serial Correct
Bad boy=Validacion Erronea= wrong validation

Best Regars Apuromafo

pd:my native language is spanish :D

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 04. Feb, 2013
Downloads: 468

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Solutions

Solution by jiml, published 11. dec, 2014; download (863 kb), password: crackmes.de or browse.

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Discussion and comments

anakha 04. Mar 2013	This is my first crackme i have ever tried, and i found the password in plain text using simple assembly explorer. Not sure if that was the way to crack it.
apuromafo Author 11. Mar 2013	if solve the algo, not must be difficult do a keygen in any languaje there you can do but only are registred for that time, about the serial correct, there exist only 1 online valid, and many offline Best Regards Apuromafo
Zananok 13. Mar 2013	Wow, pretty hard. Reversing it and encrypting it again and again.... sure doesn't help. Maybe i'm just a noob but I give it a 6/10 in difficulty, taking to account that i can see your whole encrypting process and I know .net really good.
Zananok 14. Mar 2013	Cracked.. but i didnt figure out the algorithm.. Actually i only tried for 40 minutes and decided to crack like i usually do.. Hint: Small exploit on the second message box ;) Hint2: this Hint has nothing to do with keygens. If you are planning to keygen it.. i don't have a good advice.
apuromafo Author 12. Jul 2013	the server online check was checked(posible to delete by te posible DOS in the online check (was someone try to D.O.S the web)..., not was like there exist a check online to the admin , there now not will exist solution of check online, until the dns checker will put again online, but if someone wana do a tutorial not have problem there exploit, crack too the file, best regards Apuromafo
stlcoder 06. Aug 2013	Gah! I was working through this and got to the part where it does the online check. I didn't realize the server was taken down :( Will it be coming back? I have a half finished tutorial!
apuromafo Author 08. Aug 2013	maybe can coming back in other server but first must check for not d.o.s. again. best regards Apuromafo
ralf1985 31. May, 08:42	1 - serial must not be empty 2 - serial must be 19 character 3 - serial must be seperated with ( - ) at positions 4,9,14 4 - positions ( 5, 10 ) must equals to F 5 - positions ( 0 , 18 ) must be numbers 6 - sum of position ( 0 , 18 ) must equals 10 valid serial : 1234-F789-F345-7899 Yeah that is quite easy but server isn't working anymore -_-

arashrj's Crack Me 1.2 (RJ)

Download CrackMe_1.2.zip, 153 kb (password: crackmes.de)
Browse contents of CrackMe_1.2.zip

Hi all,

no rules for this crackme, do what you want.
Goodluck and send me your solution to arashrj@gmail.com

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 04. Feb, 2007
Downloads: 1443

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Solutions

Solution by mucki, published 19. feb, 2007; download (117 kb), password: crackmes.de or browse.

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Solution by pwn, published 19. feb, 2007; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

mucki 08. Feb 2007	it's easy if you have the right tools :)

arashrj's Crack Me 1.5 (RJ)

Download CrackMe_1.5.zip, 108 kb (password: crackmes.de)
Browse contents of CrackMe_1.5.zip

Hi all,

no rules for this crackme, do what you want.
Goodluck and send me your solution to arashrj@gmail.com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 19. Feb, 2007
Downloads: 612

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Solutions

Solution by deurus, published 01. aug, 2010; download (288 kb), password: crackmes.de or browse.

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arashrj's Crack Me 1.6 (RJ)

Download CrackMe_1.6.zip, 85 kb (password: crackmes.de)
Browse contents of CrackMe_1.6.zip

Hi all,

no rules for this crackme, do what you want.
Goodluck and send me your solution to arashrj@gmail.com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 19. Feb, 2007
Downloads: 1383

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by r0ck, published 05. mar, 2007; download (23 kb), password: crackmes.de or browse.

r0ck has rated this crackme as nothing special.

Solution by Adjiang, published 02. mar, 2007; download (99 kb), password: crackmes.de or browse.

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Discussion and comments

saitob 24. Feb 2007	Wow, this looks like a tricky one! I'll see what I can do! ;)
mucki 25. Feb 2007	only md5 - that's all. very easy.
saitob 26. Feb 2007	Well, I can see that my name is turned to md5, but I cant find the serial for some reason. Maybe it's because it's 04.20am here (^.^)
mucki 26. Feb 2007	the serial is only a combination of some substrings of the md5 result

arashrj's KeyGen Me 1.2

Download KeygenMe_1.2.zip, 84 kb (password: crackmes.de)
Browse contents of KeygenMe_1.2.zip

Rules:
1-) Make a keygen that fully works.
2-) No patching the serial routine ofcourse.
3-) Write a solution/tutorial.

Have fun :-)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 05. Aug, 2007
Downloads: 612

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saitob 05. Aug 2007	There is a problem with your KeyGenMe... It will not close! After the animation is done, it just stands there and I must shut it down by bruteforce :S

arashrj's KeyGen Me 1.4

Download KeyGenMe_1.4.zip, 80 kb (password: crackmes.de)
Browse contents of KeyGenMe_1.4.zip

hi

Rules:
1-) Make a keygen that fully works.
2-) No patching the serial routine ofcourse.
3-) Write a solution/tutorial.

Have fun :-)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 12. Sep, 2007
Downloads: 548

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Solutions

Solution by ORacLE_nJ, published 17. jul, 2010; download (46 kb), password: crackmes.de or browse.

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ARCHANGEL's Against Driver

Download Against_Driver.zip, 4 kb (password: crackmes.de)
Browse contents of Against_Driver.zip

To crack this crackme your need to debug device driver's protection and break it without code modification and brute-force.
First,it seems it's quite hard do find crypted bites,but you need to see the SUB intruction to understand everything!
Valid pare:
AAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBB
But there not everything

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Assembler

Published: 14. Jan, 2008
Downloads: 411

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by rAsM, published 07. feb, 2008; download (70 kb), password: crackmes.de or browse.

rAsM has rated this crackme as nothing special.

Solution by _HellDashX_, published 22. jan, 2008; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

soychino 15. Jan 2008	good idea,but the algo only consist of some simple xor and add/minus operations.
soychino 15. Jan 2008	a little hint,xor 3:)
ARCHANGEL Author 19. Jan 2008	soychino, Yes, that's true, but the idea is to test device driver protection - not the algo, by the way, did you submit your solution?
soychino 20. Jan 2008	I used the IDA to analyze the sys file,and I found it tries to clear the debugging register,no other anti measures were found,so how if I use a Int3 breakpoint?BTW,thanks for ur valid username and password wiithout which it may take me more time to analyze it:)
rAsM 20. Jan 2008	I'll submit my solution on February, i have no time now. There is no "protection" if you clear the drx. The driver is easy to understand but for people witch never had debugged a driver the crackme will be harder.
_HellDashX_ 21. Jan 2008	Solution submit, :)
rAsM 22. Jan 2008	Hello _HellDashX_ the name can be shorter than 20 chars but serial must this size BBBBBBBBBBBBBBBBBBBB i've sent you my serial.
_HellDashX_ 23. Jan 2008	rAsm, yes, your serial work using 4 chars in the name, but only in the first check, :) If the crackme will check 2 or more times the serial/name you can get in the second pass nothing, and in the 3 pass you can get a exception and show the bad message. I send you the codes in the 2 pass and 3 pass using the name/serial that you send me.
rAsM 23. Jan 2008	Yes i know this bug,names shorter than 20 only work one time. ARCHANGEL forgot to reset the buffers. Anyway the 2 solutions are right.
Dspider0 08. Feb 2008	why does my OllyDBG always pause the program and i get an error everytime i run? error is always about the origin address

ARCHANGEL's HiddenCrackme1

Download HiddenCrackme1.zip, 143 kb (password: crackmes.de)
Browse contents of HiddenCrackme1.zip

Hi, here is the very simple protection with obfuscation. It's not uncrackable, you can do it easy. Still it can show you the ability to make your reversing much harder if you are not ready for the binary code deobfuscation.

Of course, only keygen is a valid solution.

I wish you luck.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 26. Oct, 2015
Downloads: 271

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Solutions

Solution by acruel, published 29. oct, 2015; download (2 kb), password: crackmes.de or browse.

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arintel's MineLock I

Download MedusaChallenge.zip, 26 kb (password: crackmes.de)
Browse contents of MedusaChallenge.zip

This is a $300 challenge. Below is brief information. For a full description, please visit http://minelock.blogspot.com

Description:
This is a small Pocket PC program which shows some medusas moving around the screen and eating each other. The original section of code that controls the movement of the medusas has been transformed by MineLock I technique. You will not find plain assembly instructions changing the positions of the medusas. Also, the transformed code will move the medusas correctly only when the Pocket PC is running at its maximum speed or it will freeze the medusas or quit the program otherwise.

Requirements:
The challenge is reconstruct the original code which changes the positions of the medusas and patch the program for it to run correctly with all speeds of the Pocket PC. You must not simply guess and rewrite the code. You must DEDUCE the original code from the executable file. That is, explain clearly how you get the original code by analyzing the executable file only and support your arguments by reference to the assembly code of the program. You can do it in anyway using any tools of your choice.

Usage:
There are an executable file and two license files. For the program to run correctly, rename the corresponding .lic file to MineLock.lic, put it in the root folder, and run the executable file. You can try running the program with a different speed of the Pocket PC or with a wrong license file to see the medusas freezed.

Difficulty: 9 - You can't solve this yourself :)
Platform: Unspecified/other
Language: C/C++

Published: 30. Mar, 2006
Downloads: 675

Rating

Votes: 5
Crackme is quite nice.

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Solution by hasherezade, published 11. nov, 2010; download (231 kb), password: crackmes.de or browse.

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Discussion and comments

Arkantos Author 29. Oct 2010	Anyone trying? Please write a solution
Arkantos Author 30. Oct 2010	Need any help over there? I'm ready to help. I'm waiting for a solution. Please answer me.
\|sas0\| 01. Nov 2010	solution is on the way, realy nice idea for crackme, it was fun reversing it
Tasin 02. Nov 2010	I've Keygened your Crackme in 5 minutes. but i can't submit a solution because i lost my internet connection and i'm writing from my mobile. So i can't submit it very soon... So i'll try to submit it later... Any way nice Crackme Arkantos..
Tasin 07. Nov 2010	Awesome Crackme. Written a tutorial and keygen in batch. Similiar to serial Crackme. But a little deferent. Thank to mr. Exodia for first solution. Submitting the solution quickly... Hope you like it. Awesome Crackme man...
Frighten426 08. Nov 2010	Good Crackme.... Really learnt from it....

Arkantos's Crackme5

Download Crackme5.zip, 102 kb (password: crackmes.de)
Browse contents of Crackme5.zip

This is my First Crackme Written in Visual Basic. You've To find serial and reg With Id for your name.
Mission:
Patch those nags
write A keygen.
no selfkeygen.
Write a nice solution

Easy Crackme...

It's Packed

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 23. Nov, 2010
Downloads: 388

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Solutions

Solution by deurus, published 06. dec, 2010; download (319 kb), password: crackmes.de or browse.

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Discussion and comments

deurus 24. Nov 2010	deurus 737572756564 210579ioO-avB-pM ua921N737572756564pnqVTm If i have any time, i will do the tuto
Arkantos Author 24. Nov 2010	It was so fast deurus! Waitin for you your tutorial....
woodoo34tr 26. Nov 2010	woodoo 6F6F646F6F77 210579ioO-avB-pM ua921N6F6F646F6F77pnqVTm

Arkantos's Crackme7

Download Crackme7.zip, 23 kb (password: crackmes.de)
Browse contents of Crackme7.zip

This is my Second Crackme Written in Visual Basic. You've To find serial and reg With Id for your name.
Mission:
Enable Check Button.
Patch those nags
write A keygen.
no selfkeygen.
Write a nice solution

Easy Crackme...

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 23. Nov, 2010
Downloads: 285

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Solutions

Solution by deurus, published 06. dec, 2010; download (163 kb), password: crackmes.de or browse.

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Discussion and comments

Arkantos Author 25. Nov 2010	Anyone trying? Is it too hard? I think not...
deurus 26. Nov 2010	Name: deurus Lastname: EUFUDTJR Organization: FUDUEFUE25I Serial: s15tauo737572756564zmN ID: 55554464 --------------------------------------------- Sorry but the manual will have to wait
tilosag 02. Dec 2010	Please give me some hint how to enable "Check it!". Seem's like it's being disabed during runtime and my ideas with bp EnableWindow does not work.
Arkantos Author 02. Dec 2010	You can try resource hacker(res hacker).... Load Crackme and then enable the check button...
deurus 02. Dec 2010	Reshacker can't enable the "labels"
Arkantos Author 03. Dec 2010	So what are the other ways to enable "labels"? I never tried so hard Vb crackmes.. Would you like to tell me deurus?
deurus 03. Dec 2010	Hi Arkantos! I send a solution to explain this, but in resume, with vb reformer we can enable buttons and change the interval of timer to zero. In this case the buttons are labels, and the way to enable they, is patching with olly.
Arkantos Author 04. Dec 2010	Thanks deurus, waiting for tuto!
Tasin 07. Dec 2010	Nice try Arkantos¿ Make you crackmes a little harder on future.

Arkantos's NameGenMe!

Download NameGenMe!.zip, 52 kb (password: crackmes.de)
Browse contents of NameGenMe!.zip

Try to crack it.It is my keygenme (number two)...Now i'll give you my pass and you have to find your name..
The serial is random... It's encrypted. So at first You've to Decrypt it!!
You have to find two name..
Works on XP.
Don't know about others.!!
Must have Vbscript Host.>.>
You can post for Help!!
It's not easy i think.
your mission:
1. Make a keygen.
2. Write a Cute solution.

Sorry for my bad English..

Packer: You have to Find..
Thanks to Everyone...
You can Punish me at r_u_s_h_e_d@myself.com
Bye Bye...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 23. Nov, 2010
Downloads: 284

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by deurus, published 12. dec, 2010; download (245 kb), password: crackmes.de or browse.

deurus has rated this crackme as nothing special.

Solution by draww, published 13. dec, 2010; download (23 kb), password: crackmes.de or browse.

draww has rated this crackme as boring crap.

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Discussion and comments

Arkantos Author 05. Dec 2010	Anyone trying? Is it soo boring?
Tasin 07. Dec 2010	No it's not! Hmmm i've done it 60%. So rest of it is confusing, it's kinda hard. It writes random number to a file, makes it a variable, then checks specific numbers and goes to another variable? I think i'll write a solution very soon.
draww 08. Dec 2010	there is nothing special.. only a batch file compiled with exescript. solved everything about it, but it's so boring man.. why don't you delete the leftovers (i mean vbs files & jkf file) you only hide them under system folders..
Arkantos Author 09. Dec 2010	So what kind of crackmes you like?
draww 09. Dec 2010	well, it has some nice features but i was answering your 1st question.. and i still think it's boring ;) keygening is really easy, we only have to modify your decrypted batch to show us the names. btw thanks for the effort mate.
Arkantos Author 10. Dec 2010	it's okay draww...... I'll try my best to write some interesting crackmes.....
deurus 10. Dec 2010	I suposed that the script is batch [faf.bat] but even invert the jump to view the crackme i dont view the batch file in nowhere. curious!
deurus 11. Dec 2010	Im near!!!! Serial1: 321358541-42486224-421724624-42827941 Name1: n4nt8aroi42 Serial2: 5210348-3514593-13215188-5342521 Name2: r04ck48-351oc8oc only for curious because the serials are random ;-)
draww 11. Dec 2010	well deurus, if you successfully deobfuscated the batch file, you'll have everything that you need :))
deurus 12. Dec 2010	@draww: I finally finished ;-)

Arkantos's Serial

Download First_Crackme.zip, 7 kb (password: crackmes.de)
Browse contents of First_Crackme.zip

Try to crack it.It is my First Crackme... You have to find out Five Serials....
The Name is "as you wish".. But the Serials Are the same. It's easy... You can try...
Sorry for my Bad English..

No Packer
Used MS Dos to write this thing
Thanks to Everyone...
You can Punish me at r_u_s_h_e_d@myself.com
Bye Bye...

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 16. Oct, 2010
Downloads: 789

Rating

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Solutions

Solution by Mr. eXoDia, published 19. oct, 2010; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

Mr. eXoDia 18. Oct 2010	With the name "cracker" your serials can be: 1. cracker57f8s+-e@s\/ 2. cracker57f8s+-e@s\/oneld-561-fch@rd 3. cracker123fa4v5bwh@rd 4. h@rde@s\/6n6o8t4h4i6n4gcracker57f8s+-e@s\/ 5. cracker57f8s+-e@s\/h@rde@s\/6n6o8t4h4i6n4gcracker57f8s+-e@s\/e@s\/h@rd I'm writing a solution + a keygen in batch for you right now! Mr. eXoDia // T.P.o.D.T 2010 http://tpodt.tk http://forum.tpodt.tk
Xspider 18. Oct 2010	well you can find the main batch file in: %temp%\CF.tmp
Mr. eXoDia 19. Oct 2010	ok In my soltution i just open the file in notepad :p And be4 I forget: I coded a keygen in batch :p dload it here (if you are intersted): http://www.mediafire.com/?c5nkw5h22pqito6
Arkantos Author 20. Oct 2010	Thanks Mr. eXoDia... I think more crackme will be great.
Tasin 07. Nov 2010	Awesome Crackme Arkantos. Better than Crackme3.. Wrote an keygen in batch...
Frighten426 08. Nov 2010	Awesome... I agree with Tasin... Better than Crackme3...
promix17 30. Dec 2010	Thank's for this CrackME))) It's the first I've solved!!!
Arkantos Author 30. Dec 2010	Crackmes are to be solved. I hope you enjoyed it :-) i'd be glad if you enjoyed it.

Arkantos's Serial2

Download Second_Crackme.zip, 7 kb (password: crackmes.de)
Browse contents of Second_Crackme.zip

Try to crack it.It is my Second Crackme...Now You have to find out Six Serials....
The Name is "as YOU Wish".. But the Serials Are based on your name.I think it's not so easy... You can try...
Sorry for my Bad English..

Packer: You have to Find..
Used MS Dos to write this thing
Thanks to Everyone...
You can Punish me at r_u_s_h_e_d@myself.com
Bye Bye...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 27. Oct, 2010
Downloads: 410

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Solutions

Solution by hasherezade, published 11. nov, 2010; download (222 kb), password: crackmes.de or browse.

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Solution by havaliza, published 11. nov, 2010; download (466 b), password: crackmes.de or browse.

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Discussion and comments

Xspider 27. Oct 2010	run -> %Temp% --> A6.tmp ;)
Arkantos Author 28. Oct 2010	Anyone trying? Are you trying to crack it. I don't see much comments.
Arkantos Author 28. Oct 2010	Anyone trying to solve it? I think it's easy. A little trick will solve it.
Mr. eXoDia 28. Oct 2010	Im trying this right now and I will try to write a nice solution
\|sas0\| 29. Oct 2010	nice idea with batch file, as soon as I write decent tutorial I will upload solution
Arkantos Author 30. Oct 2010	Need some help over there? I'm ready to help.
slackwarshik 30. Oct 2010	dr.web say that this crackme is suspicious))
Arkantos Author 31. Oct 2010	Need any tips? I'm ready to help you. Just ask.

arminb's DevilMayCrack #1

Download DMC1.zip, 67 kb (password: crackmes.de)
Browse contents of DMC1.zip

Try to crack this CrackMe. Patching is not allowed!
It's my first btw. Feedback would be nice :D

Have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 02. Dec, 2008
Downloads: 460

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Solutions

Solution by ORacLE_nJ, published 12. dec, 2009; download (22 kb), password: crackmes.de or browse.

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Discussion and comments

mjesun 03. Dec 2008	Is keyfishing / selfkeygenning allowed?
arminb Author 03. Dec 2008	If you write a nice tutorial, why not. Never have seen how to do this. But it would be also great if someone gets the algo and write a keygen.
arminb Author 04. Dec 2008	There are 6 solutions in queue since 3 days! I don't know if this is normal, but i can't wait to see some solutions. So everyone who has solved this, please load it somewhere up and send me a messagge. Thanks a lot. Forgive me if i did a mistake.
mjesun 05. Dec 2008	I already solved it, but I'm making a very very lovely keygen, using the "?" button of your crackme to show the valid serial for your keygen. I know that it's not the easiest solution from far, but with this method I will develop pieces of code to make a generical interface for __vbaStrCmp / __vbaVarTestEq crackmes. ;) be patient my friend
ORacLE_nJ 13. Dec 2009	Hi guys.. How is my soln?? I'm sorry i dont know to program a GUI.. :-)
ORacLE_nJ 13. Dec 2009	Hi guys.. How is my soln?? I'm a beginner in programming. I have studied only console based programs... I'm sorry i dont know to program a GUI.. :-)
dahiphop 31. Dec 2009	Name: DAHipHop Serial: F869-5341-168D-8E76 => Crackme easy for newbie
arminb Author 18. Jul 2010	thanks for the solution ORacLE_nJ! very nice

Artfulwave's AUZ_Cavora

Download AUZ_Cavora.zip, 1212 kb (password: crackmes.de)
Browse contents of AUZ_Cavora.zip

Hey guys Here is a new Keygenme
This keygen does not seem to be like the others
======================================
Protection future:
===============
Anti-Noobz
Anti-Serail Fishing
Long-Serial-Generator
Discover the other futures on your own
Of course i have coded the functions on my own.
======================================
Rules:
=====
NO PATCHING //Allowed in removing the protection functions
NO SERIAL FISHING (Anti-SerialFishing makes the serail wrong on other PCs)
Of course the only valid solution is a keygen
=======================================
Artfulwave@gmail.com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 26. Mar, 2013
Downloads: 172

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Discussion and comments

Artfulwave's CanYoUDoIt? Keygenguru

Download Keygenme_ZIP.zip, 1197 kb (password: crackmes.de)
Browse contents of Keygenme_ZIP.zip

Indeed this is my first keygen so i will be too glad to take your feedback and advises so keep commenting :).

Patching is allowed in case you are going to make a patcher.exe
Keygen is a perfect solution
A valid serial is accepted ( 4 IDs ,Passwords ).

if you could help the newbies by a tutorial this will be too great

Thanks for reading

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 08. Mar, 2013
Downloads: 372

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by Ice_cracked, published 08. apr, 2013; download (1515 kb), password: crackmes.de or browse.

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Solution by iSSoGoo, published 13. mar, 2013; download (54 kb), password: crackmes.de or browse.

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Discussion and comments

iSSoGoo 08. Mar 2013	Short question: What do you mean with "Patching is allowed" (Description) and "Patching is NOT allowed" (Keygen). Actually patching is pretty easy (maybe 1 or 2 bytes only) thus writing a patcher or a loader should work, you could even use a patcher-builder (dUP 2 etc.). Is that what you mean, because that would be too easy for a 2/10 ;)
Artfulwave Author 08. Mar 2013	As i wrote it`s my first keygen me so i wanted to see the solution of everyone but OK Patching is not allowed :).Give me your advice about how to change the description! xD
iSSoGoo 09. Mar 2013	Just write "Do a keygen, NO patching allowed" I think that will be totally ok ;) BTW: I submitted a solution a few hours ago, it takes some time, because the solutions are all checked by a moderator if I should send you the solution, just write me a PM ;)
Artfulwave Author 09. Mar 2013	I will write a PM to you :)
bearchik 11. Mar 2013	Solved. 14-8--7-Bearchik-Art
Artfulwave Author 12. Mar 2013	Would you make a keygen , Wouldn`t you ?
bearchik 13. Mar 2013	Solution and keygen was sent on moderation.
Artfulwave Author 13. Mar 2013	Nice :) Keep up the good work bro
ideku_nih 12. Apr 2013	I don't know.. i just found this 10-4--11-atit-Art
Artfulwave Author 15. Apr 2013	You meant "Cant make a keygen ?" Or ?

Artfulwave's Need a little brain ?

Download SwampAttackKeygenme.zip, 1246 kb (password: crackmes.de)
Browse contents of SwampAttackKeygenme.zip

A new keygen me the 3rd one :).Might be hard for newbies

your solution must be a keygen + src + tut

Patching is not allowed is unaccepted

Thanks for reading Enj0y Cr4cKiNg

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 20. Mar, 2013
Downloads: 321

Rating

Votes: 3
Crackme is boring.

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Solutions

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Discussion and comments

gregorbyatt@hotmail.com 25. Mar 2013	they are practice cracking programs im guessing ?
Artfulwave Author 25. Mar 2013	Yeps , that`s it. Reverser`s Ground!
yo-mismo 01. Apr 2013	Thank you, was easy :) i'm spanish, but i gonna try write a tutorial
loizos 02. Apr 2013	I love it's music :)
Artfulwave Author 03. Apr 2013	yo-mismo<-- Thanks :) Iam glad to hear that you have liked it I cant wait till i see your Tut + keygen ^_^
Artfulwave Author 03. Apr 2013	Loizos<--- Thanks :) I love this music too
ideku_nih 16. Apr 2013	I search for luck, and i can't find it. Are there any converter ASM to BAS?? damn i must learn from begin..
Artfulwave Author 21. Apr 2013	Tell me what are you looking for ? I might help :)
jmper 11. May 2013	try empty username and serial lol :D

Artfulwave's NeverGotOwned

Download NeverGotOwned.zip, 1036 kb (password: crackmes.de)
Browse contents of NeverGotOwned.zip

Feedback , Comment.

Here is the rules:

The only valid solution is a keygen

You might include :

Keygen + src : tutorials for beginners

Thanks _ Artfulwave

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 20. Mar, 2013
Downloads: 207

Rating

Votes: 4
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

redoC 13. May 2013	Does this have real solution? Serial requires UNICODE chars like 0xFFAF ?
mopy 13. May 2013	yes, redoC is right. This keygenme has no "normal-looking" serials for every username. It's impossible ..
zairon Moderator 13. May 2013	If you really think there's a flow inside the serial generation scheme you can write a tutorial explaining everything in details. We don't have any kind of problem accepting something like that :)
hPl0w 20. May 2013	is not for noobs, i am one (:. PD : Nice Crackme.
Artfulwave Author 29. May 2013	Sorry , was busy the last few days.. redoC : it got a solution mopy : Yeah , it has..If you want to know why PM me zairon: got a question about it PM me hPl0w: i thought it`s easy for noobs i was going to choose it`s difficulty as 1. .. there is like 11 function in this keygen for serial generating/validation.. Thanks..

Arthi's ArthisCrackme1.02Final

Download Arthis_Crackme_NX_1.02_Final.zip, 105 kb (password: crackmes.de)
Browse contents of Arthis_Crackme_NX_1.02_Final.zip

Find the valid Serial !

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: (Visual) Basic

Published: 23. Nov, 2004
Downloads: 1949

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by deroko, published 15. oct, 2005; download (43 kb), password: crackmes.de or browse.

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Discussion and comments

deroko 13. Oct 2005	I got key but it doesn't do anything, so I have to terminate app by typing wrong key... is this a bug or feature???
bigboss1988 13. Oct 2005	oh very hard :( i tried to found OEP 00411216 EB 01 JMP SHORT Arthis_C.00411219 Or 0041121C E8 01000000 CALL Arthis_C.00411222 i don't know where's OEP ? i ill stay to submit ur solution deroko :)
deroko 14. Oct 2005	yah that's it, if serial is incorect it prints error msg if serial is right nothing happens, form is created after getkey/inputkey check, and this is really huge huge serial =)
bigboss1988 15. Oct 2005	Wow deroko good job;) i have problem when i setup DriverStudio3.2 on winXP sp2 Soft-ice doesn't work ?!! cheers :)

Arthi's Arthis Keygenme A.0.3Final

Download ArthisKeygenmeA0.3Final.zip, 8 kb (password: crackmes.de)
Browse contents of ArthisKeygenmeA0.3Final.zip

Write a Keygen !

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: (Visual) Basic

Published: 12. Oct, 2005
Downloads: 1156

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by MACH4, published 21. feb, 2009; download (1328 kb), password: crackmes.de or browse.

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Solution by ultrasound, published 13. oct, 2005; download (16 kb), password: crackmes.de or browse.

ultrasound has rated this crackme as boring.

Discussion and comments

Arthi's Arthis Keygenme A0.2

Download ArthisKeygenmeA0.2.zip, 12 kb (password: crackmes.de)
Browse contents of ArthisKeygenmeA0.2.zip

Write a Keygen !

Difficulty: 7 - Very hard
Platform: Windows
Language: (Visual) Basic

Published: 09. Oct, 2005
Downloads: 866

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Solutions

Solution by deroko, published 12. oct, 2005; download (46 kb), password: crackmes.de or browse.

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Discussion and comments

IronBOSS 09. Oct 2005	Runt-time error '5': Invalid procedure call or argument Win XP Pro. Ppl please check your crackmes before submit.
deroko 09. Oct 2005	works fine on xp sp2...
HMX0101 10. Oct 2005	its working on winxp sp2, without any problems
Arthi Author 10. Oct 2005	@ IronBOSS : Please download the newest VB6-Runtimes ! Greetz Arthi
deroko 11. Oct 2005	maybe you should make better keycheck routine, this one was easy to self-keygen... and that is not something that should happen in 7/10 rated crackmes...

Arthi's CrackmeNX2Final.exe

Download CrackmeNX2Final.exe.zip, 11 kb (password: crackmes.de)
Browse contents of CrackmeNX2Final.exe.zip

Crack it or find the only one valid Serial !"

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 24. Jun, 2005
Downloads: 1279

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by El_PuPaZzArO, published 13. sep, 2006; download (56 kb), password: crackmes.de or browse.

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Solution by EsKiMo, published 27. jun, 2005; download (25 kb), password: crackmes.de or browse.

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Discussion and comments

ArturDents's Crackme #1

Download ad_cm1.zip, 1 kb (password: crackmes.de)
Browse contents of ad_cm1.zip

Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Jul, 2002
Downloads: 3220

Rating

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Solutions

Solution by bRaiN_faKKer, published 08. oct, 2002; download (827 b), password: crackmes.de or browse.

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Solution by CuTedEvil, published 22. jul, 2002; download (938 b), password: crackmes.de or browse.

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Discussion and comments

ArturDents's Crackme #2

Download ad_cm2.zip, 2 kb (password: crackmes.de)
Browse contents of ad_cm2.zip

Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Jul, 2002
Downloads: 3453

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Solutions

Solution by CuTedEvil, published 22. jul, 2002; download (3 kb), password: crackmes.de or browse.

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ArturDents's Crackme #3

Download ad_cm3.zip, 192 kb (password: crackmes.de)
Browse contents of ad_cm3.zip

Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Jul, 2002
Downloads: 3442

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Solutions

Solution by D4ph1, published 08. oct, 2005; download (33 kb), password: crackmes.de or browse.

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Solution by CuTedEvil, published 22. jul, 2002; download (6 kb), password: crackmes.de or browse.

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ArturDents's Crackme #4

Download ad_cm4.zip, 169 kb (password: crackmes.de)
Browse contents of ad_cm4.zip

Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Jul, 2002
Downloads: 3107

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Solutions

Solution by D4ph1, published 05. oct, 2005; download (79 kb), password: crackmes.de or browse.

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Solution by Lesco, published 25. jul, 2005; download (241 kb), password: crackmes.de or browse.

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Solution by cronos, published 06. sep, 2002; download (38 kb), password: crackmes.de or browse.

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ArturDents's Crackme #5

Download ad_cm5.zip, 131 kb (password: crackmes.de)
Browse contents of ad_cm5.zip

Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Jul, 2002
Downloads: 2868

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Solutions

Solution by ShadowKat, published 01. aug, 2002; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

ascii's kgm1

Download kgm1.tar.gz, 2 kb

Another KeyGenMe but for Linux.

Wrote in C and compiled with GCC.
This x86 Linux binary is 32-bit and need libc6.

Rules:
- No patching.
- Write a keygen.

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 05. Dec, 2007
Downloads: 3293

Rating

Votes: 7
Crackme is nothing special.

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Solutions

Solution by magnanimous, published 26. may, 2008; download (9 kb), password: crackmes.de or browse.

magnanimous has rated this crackme as quite nice.

Solution by whats, published 21. may, 2008; download (4 kb), password: crackmes.de or browse.

whats has rated this crackme as quite nice.

Solution by pof_es, published 19. dec, 2007; download (7 kb), password: crackmes.de or browse.

pof_es has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

bierik 25. Nov 2012	Very nice and very well suited for a newbie such as myself.
vendramini 06. Feb 2013	Good one, helped me out a lot. Specially the solutions. Thank you!
ShadowyViper 05. Sep 2013	Very interesting, first crackme for me, and now that i discover on my own how does it work i'm writing the keygen :D thanks for the fun
Noteworthy 05. Dec 2013	Cracking done ! Thanks for the keygen me.

astigmata's Bruteforceme#1_astigmata

Download bruteforceme#1_astigmata.zip, 30 kb (password: crackmes.de)
Browse contents of bruteforceme#1_astigmata.zip

Hi crackers,
this is my first crackme
I made it easy and with sources codes (54 lines, not packed)
sometimes bruteforce is required
that's why I want you try this one.
I want the good key and a working bruteforce

I hope you enjoy

astigmata

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 24. Feb, 2006
Downloads: 1292

Rating

Votes: 10
Crackme is boring.

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Solutions

Solution by andrewl.us, published 27. dec, 2008; download (340 kb), password: crackmes.de or browse.

andrewl.us has rated this crackme as awesome.

Download onetorulethemall.tar.gz, 401 b

Discussion and comments

Dahaka 25. Feb 2006	holy smoke! you should be running on some super computer to go over bruteforcing some pass phrase with 100000000 loop! by 1583242846 possibility!
NexusC 25. Feb 2006	hehe, would have been easier if we knew what range of chars to use ;) since " " - "~" is kinda heavy but can't be excluded if u wanna have 100% accuracy..
HMX0101 25. Feb 2006	i think that loops can be made for separately...
astigmata Author 25. Feb 2006	there are only numbers in the good key 1,2,3,4,5,6,7,8,9,0 for the size of the key, check the algo :)
HMX0101 25. Feb 2006	i need a number that parsed by the algorithm of the crackme has equal to 0D5446474h ?
NexusC 25. Feb 2006	ok, thx :P that will reduce the needed time alot :P
astigmata Author 25. Feb 2006	yes hmx0101, but you can't reverse it because you don't know value of ebx before the XOR that's why it's called brutforceme :D if you find without bruteforce, go buy a lottery ticket.
Rambo 25. Feb 2006	hmm.. if we can find the value of CL then we can make keygen ;) but i don't have time to math ;)
Rambo 25. Feb 2006	sorry. no keygen ,but brute algo
NexusC 25. Feb 2006	lol, this might take a few weeks depending on the starting number in the key xD
HMX0101 25. Feb 2006	that sounds easy :D
~raj 27. Feb 2006	Keycode is 8 digit no from 0000 0000 to 9999 9999. For each number it loops for 1 0000 0000 (5F5E100) times. for each iternation it takes around 70 seconds. So total time reqquired for brute force method will be: 1 0000 0000 * 1 0000 0000 * 70 = 700000000000000000 sec = 11666666666666666.67 min = 194444444444444.44 hr = 8101851851851.85 days = 22196854388.63 yrs !!!!! ;^*) What do you think ?
Rambo 27. Feb 2006	each iteration 70 sec ????
Kerberos 27. Feb 2006	~Raj: Whole serial check takes 5 seconds on my PDA so you really need new computer :) And if you're calculations are right for your computer, then you need to wait (100000000 * 70) seconds until your serial code is checked in this CME ...
NexusC 27. Feb 2006	hehe, to know the starting number in the key would shorten the brute by a load of weeks on my comp ;)
astigmata Author 27. Feb 2006	I say 3 years if you test every serial without found the correct one. but you are 6000 here, if someone makes a good bruteforce (like SETI@home lol), with many ranges, you ll be able to defeat this level1 crackme :D
~raj 28. Feb 2006	70 sec time taken was for checking 100 numbers in loop ;-( mistake there So total time will some down by factor of 100
NexusC 01. Mar 2006	no matter how good brute u code i think ppl will skip this one coz it's just too time consuming to dedicate the computer resources for a lvl1 crackme ;) so a shorter key would have been better imho :)
costy 03. Mar 2006	is it possible to do a bruteforcer changing to source code?
astigmata Author 04. Mar 2006	to do a bruteforce, you need to add a loop, that's all
ManSun 26. Mar 2006	Yes its very easy but... 1 cobmination / 1 second 8 digits password = 100000000 combinations = 100000000 sec = 1666666 min = 27777 hours = 1157 days = ~3,1 years :-D
Shism 27. Mar 2006	Instead of doing that use random brutefoce
phueghy 27. Mar 2006	But random BF does not increase the chance of finding the right key. And you have to make sure not to check some numbers twice. It would be easier if we knew the first one or to digits though :-)
Shism 29. Mar 2006	It does increase the chance of finding the right key...
phueghy 29. Mar 2006	Why? The Chance of finding the right key is 1:100000000, no matter if you are searching randomly or linear. It could just as well be 500000004 as it could be 81640724.
Shism 29. Mar 2006	Why becuase chance you find the right key increases. Let's say the key is 17 chars long So you go in a linear form testing each combination. That's the way you want to do it. So you go through every combination of chars from the 1 char long length to 17 char long length. RBF tests every combination of keys randomly. So if lets say the key is 17 chars long, with linear bruteforce it would take forever, however the chances that a random bruteforce finds the key is much higher than linear bruteforce. Lets say the key is ^KC.&>)D_?F)+"F(D ... So the chances of linear bf finding they key can be stated. An estimate can be made. However,on random bruteforce an estimate can't be made. There is no chance for random bruteforce. The chances of finding the right key are 100% for both. Bruteforcing the key gaurentes finding the right key. Bruteforcing will increase your chances.
Shism 29. Mar 2006	*Random bruteforcing will increase your chances of finding the right key
TDC[NL] 24. Apr 2006	hint: EBX must be 85AE3E6C in hex at 00401070 after the loop :) maybe some guy can now do it?
Ox87k 24. Apr 2006	ebx must be 85AE3E6C only if eax is 50EA5A18... or not?
BugHunter 24. Apr 2006	to be honest, you have a point there, i'm trying 2 figure it out but i'm sleepy and thinking is hard now ^^
BugHunter 24. Apr 2006	yes you are right 0x87k! sorry for my wrong post :-D still trying to find a way to reverse hehe
BugHunter 24. Apr 2006	i made some comments on my bruter source code, check it out: ;EAX must be 0xD5446474 at the end ;let's say EAX = 0x52212755 and EBX = 0x87654321 (xor EAX with 0xD5446474) ;then before the encryption algo you need to have valid numbers in ASCII ;hmmm, so lets initialize the registers and let's try to bruteforce a ;valid alpha numeric serial ;so EAX = random hex number, EBX = xor 0xD5446474 with the random EAX ;then do the loop ;now check if EBX is ALPHA NUMERIC maybe helps coding a bruter? i've coded one and it's now bruting :D
BugHunter 24. Apr 2006	tip: if you dont brute with a random value, then increase by one a value each loop, but begin with 0x0000FFFF because if you XOR a dword with something lower than 0x00010000 than the upper characters will NEVER be alpha numeric, you could even research/think more about it and code a good bruter
BugHunter 25. Apr 2006	any 1 tried yet?
SoN 25. Apr 2006	I wrote a working brute forcer but the moderator says that the algo can be modified to run quicker. I'm not quite sure how yet but I'm looking at it.
indomit 25. Apr 2006	TDC[NL], if ebx must be 85AE3E6C in hex at 00401070 after the loop, then when ecx=1000000-4, I cannot reverse this: MOV CL,AL RCR EAX,CL if after it code EAX=73AC9313 and EBX=22D0B21F, then all be fine in 3 full loops ;) But that is the question: EAX=? before this two operations? It can be reversed for CL=(from 00 to FF)
indomit 25. Apr 2006	sorry... Last sentence: It can't be reversed...
costy 07. Jul 2008	@moderators The possible keys are from 00000000 to 11111111. I made a keygen but I think that it will never find a solution becouse it takes a second to try a key. My bruteforcer is a self bruteforcer so i don't think it can be faster if i made another one. I tested it for a while. It makes its job but it's impossible to find a serial becouse it's slow. Can I send it as valid solution? I think that the algo can't be reversed.
sd333221 07. Jul 2008	I will submit my solution in two years when my bruteforcer is done. Please wait xD
sd333221 07. Jul 2008	My current bruteforcer takes 300ms per try :-( Way too much
TiGa 07. Jul 2008	To be accepted, your bruteforcer has to find the serial in a reasonable amount of time.
sd333221 08. Jul 2008	I just see that "00000001" is also accepted as an input, so there are more combinations
costy 08. Jul 2008	Sorry I committed an error while writing "The possible keys are from 00000000 to 11111111". Infact their range is from 00000000 to 99999999. @sd333221 what computer do you have? mine has got a 1000 Mhz processor. I take a second to trying a serial. I selfbruted it.
saitob 08. Jul 2008	Off Topic: Ohh costy, that's bad xD Why do you not upgrade your computer? I mean, the parts cost nothing now a days. You can get a compleatly new and super fast computer for some hundred dollars. On Topic: Crackme looks interesting, but i'll wait for a solution.
sd333221 08. Jul 2008	Got a Dual Core 3 ghz
sd333221 08. Jul 2008	costy how do you change the numbers? You have to change the strings. I don't understand why it is not possible to just reverse the algorithm like that: MOV EAX, 1; //LOOP CONTINUE: XCHG EBX,EDX SUB EBX,0x11223344 SUB EBX,EDX MOV CL,BL RCL EBX,CL DEC EAX; JNE CONTINUE; For me it works like for the first 2 steps, and then somehow the numbers are changing
costy 08. Jul 2008	@saitob I'm poor :-( @sd333221 about the computer I'm poor :-( about the selfgen... In order to change the number... At the program start the string must be"00000000" MOV DWORD PTR DS:[404000],30303030 MOV DWORD PTR DS:[404004],30303030 JMP faster.00401010 the start each time it generates a new serial MOV EAX,faster.00404000 mov the string in eax INC BYTE PTR DS:[EAX] inc the first byte CMP BYTE PTR DS:[EAX],3A byte must be in the range 30 - 39 (ascii 30 = number zero ascii 39 = number nine) JNZ tothestartandtryit MOV BYTE PTR DS:[EAX],30 if byte > hex39 ... byte = 30 (number zero in ascii) INC EAX JMP inc_the_next_byte the selfgen tries 00000000 10000000 20000000 30000000 40000000 50000000 60000000 70000000 80000000 90000000 01000000 11000000 ..... 19000000 02000000 .... Anyway I can send you the exe. If you want
HMX0101 08. Jul 2008	I'm bruting it over a Athlon 2ghz.. after 9hours it have made 1ABA5h checks... so some calcs with i've made: 9h-----1ABA5h 24h----x x=(241ABA5h)/9=6AE94h 1 day = 6AE94h 2 day = D5D28h 3 day = 140BBCh ... 5888 days = 99AF4C00h / aprox. 99999999h 1yr-----365days x-------5888days x=1yr*5888days/365days=16years so, i think i'll leave this one :D good luck, guys ;)
costy 08. Jul 2008	@moderators Could this crackme can considered impossible to solve? And if it's impossible could be deleted??
p1nasIAT 19. Aug 2008	@costy This is very possible to solve in a short time by brute-forcing. All you need to do is think out of the box, literally. I solved this one yesterday. I'll write a solution if I find the time, soon.
ARCHANGEL 20. Aug 2008	@p1nasIAT It would be interesting to see the result of your bruting... We'll wait.
andrewl.us Moderator 20. Aug 2008	@p1nasIAT I'm both skeptical and excited of your claim. Post or message me the DWORD :)
sd333221 28. Oct 2008	15 years and 36 days remaining until I got this one
Ox87k 28. Oct 2008	@sd333221: AHAHAHAHAHA, LOL! :)
main 30. Oct 2008	Thanks p1nasIAT for the "out of the box" thinking, I may be on to something. Just have to learn some stuff first! Tip: You really have to think different. Think of all the ways the components in your computer can do computing :)
main 30. Oct 2008	Too bad I don´t have the components needed to solve it :(
main 31. Oct 2008	If I don´t get the components I need, this will take at leat 1.5 year with my computer. Even if I use all of my computers this will take a bit over 180 days... Of course... We could split this crackme up in parts? There are 818 (round = 800) downloads.... I have working bruteforcer, so if half of us = 400 goes from 99999999 to 00000000 and the other half does do opposite, then we could solve this in 1 min. Like this: Computer 1 starts from 0000 0000 Computer 2 starts from 0000 0000 + amount_of_work_done_by_one_computer * current_num_of_computers ... Computer 401 starts from 9999 9999 Computer 402 starts from 9999 9999 - amount_of_work_done_by_one_computer * current_num_of_computers If amount_of_work_done_by_one_computer is the amount of work a computer can do :), then we could solve this very fast. There are 10^8 passwords to try. Each password takes (depending of implementation and computer), say 0.5 seconds to try (we can try 2 passwords / second). Then If we have 800 computers and this task is distributed equally, we can solve this with 100% accuracy in about 17 hours (maybe less because of my calculations). Is this a possible solution (besides the solution to have special components to solve it)?
main 31. Oct 2008	"we could solve this in 1 min", ok maybe a bit exaggerated, but I was a bit excited. :P
main 01. Nov 2008	Maybe we should write some all-round brute-forcing client that could be used for different tasks? Then we could solve quite many tasks that seem unsolvable. It´s all about computing power. You could have a system where there are code to be executed located in some database, or dll:s that where downloaded or whatever (I´m just thinking here) and put in a queue and then equally distributed over the clients as I was talking about above. A system where every other computer is allotted (is that the correct word?) a piece of work and if it is done processing, it request another piece and so on. It could be quite powerful. What do you think?
andrewl.us Moderator 01. Nov 2008	Nice idea! http://www.distributed.net/
user2k 01. Nov 2008	heh, seti-like project started because of bruteforce-me, nice idea :)
main 02. Nov 2008	Interesting link andrewl.us! @user2k yeah, it´s maybe a bit too much work just because of this one, but what the h-ll, once you´ve written a client (or use some already existing) it could be fun :) And also, there are quite some users registered here on crackmes.de, if we got people engaged in this stuff it would be great! We could solve alot of things together!
andrewl.us Moderator 17. Dec 2008	A Christmas gift for crackmes.de; the key should be found by December 25th at the latest. You can view the live status of the key searching at http://andrewl.us/astigmata (assuming a valid key actually exists, that they key really does consist only of decimal digits, and that nothing environmental like loss of power or computer bursting into flames occurs)
cyclops Moderator 21. Dec 2008	@Andrew: Damn! You(you're PC) is working hard on it :) Great initiative to solve a single crackme! Lotta respect 4 you :)
andrewl.us Moderator 24. Dec 2008	KEY: 76449502 Thanks cyclops :) Wanted to hold off reply until this thing actually worked. Was starting to have doubts :/
xylitol 27. Dec 2008	wow nice work andrewl.us !
aout 27. Dec 2008	Awesome solution, really made my day :D
simonzack Moderator 12. Jan 2009	that was totally awesome god what a fast pc too

aton's One to rule them all

my first crackme, have fun!

one is needed to rule them all.
tip: think about what the base pointer does.

rules: no patching

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 26. Jan, 2006
Downloads: 542

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Votes: 6
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Solutions

Solution by lagalopex, published 26. jan, 2008; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

aton Author 25. Jan 2006	by the way, the executable in the tar.gz is not suitable for developing an exploit (it is part of the crackme to find out why). i compiled it on my system without special care. use the sourcecode.
aton Author 25. Jan 2006	no patching means: no static patching, no dynamic patching, including: "high-jacking".. ld_preload, ptrace, kmod, etc. etc.
Qnix 27. Jan 2006	aton :p .......
crp- 27. Jan 2006	hehe funny qnix... you exploited the 1st version which actually had a "bug", which made it not exploitable at all ;)
Qnix 27. Jan 2006	heheheh i didn't exploit anything ... it all wrong :p
Qnix 04. Feb 2006	the solution still here !! moderators should remove my solution !!
zairon Moderator 05. Feb 2006	Ok.....
taviso 03. May 2006	Is this supposed to be a joke? there is no way that code is ever going to print "cracked". That off by one error is not exploitable with any compiler I have here, maybe with some obscure flag or specific version, but if that's the case you should provide an executable. Even if it did work, this isnt really a crackme, no original thinking is required, you can just copy and paste a stock exploit out of any of the numerous papers/books on the subject, anyone interested in the subject has surely already written their own examples which must be much more interesting than this.
taviso 03. May 2006	Some research suggests this might be exploitable with earlier gcc versions (<3.3 ?), but if this is what you tested with, you should have stated that or provided an executable, I dont have an ealier gcc here.
crp- 03. May 2006	according to a previous conversation with the crackme author, to figure out the specific compiler (version) needed to make this code exploitable is part of the challenge...
taviso 03. May 2006	Okay, fair enough i suppose :)
lagalopex 06. May 2007	no patching... but no compiler specified... what about coding our own compiler 8-) btw... who the h*ll has a 3.x compiler installed or which distribution still offers such an old compiler... to much hassle for a find-a-vulnerable-compiler-and-exploit-it "crackme" (it doesn't deserves to be called a crackME ;) )
lagalopex 05. Jan 2008	Question. Nowhere is mentioned, what the aim of this "crackme" is. Just executing it like: ./otrta 'Cracked!!! you are the lord of the base pointer ' Would output the perhaps expected string... ;) Is anybody thinking someone would solve this? Could aton perhaps post a solution? Including a vulnerable executable? (also he wasn here for a year...)

AttilhaZ's Crackme01

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Very simple crackme in VB.

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 18. Apr, 2004
Downloads: 2351

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Solutions

Solution by kewlkish, published 05. aug, 2004; download (7 kb), password: crackmes.de or browse.

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Solution by xyzero, published 20. apr, 2004; download (624 b), password: crackmes.de or browse.

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Solution by myllan, published 20. apr, 2004; download (796 b), password: crackmes.de or browse.

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Solution by ZeroZero, published 20. apr, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by LuCiFeR, published 20. apr, 2004; download (1 kb), password: crackmes.de or browse.

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LeeviON 30. Nov 2008	Very easy.. very easy.

AttilhaZ's Crackme02

Download crackme02.zip, 4 kb (password: crackmes.de)
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NAG Screen crackme in VB6

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 18. Apr, 2004
Downloads: 1774

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Solutions

Solution by xyzero, published 20. apr, 2004; download (822 b), password: crackmes.de or browse.

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Solution by myllan, published 20. apr, 2004; download (5 kb), password: crackmes.de or browse.

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Solution by ZeroZero, published 20. apr, 2004; download (14 kb), password: crackmes.de or browse.

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AttilhaZ's Crackme03

Download crackme03.zip, 4 kb (password: crackmes.de)
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A simple crackme in vb. Enable a button!!!

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 18. Apr, 2004
Downloads: 1808

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Solutions

Solution by xyzero, published 20. apr, 2004; download (926 b), password: crackmes.de or browse.

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Solution by ZeroZero, published 20. apr, 2004; download (14 kb), password: crackmes.de or browse.

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Solution by LuCiFeR, published 20. apr, 2004; download (4 kb), password: crackmes.de or browse.

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AttilhaZ's Crackme04

Download crackme04.zip, 3 kb (password: crackmes.de)
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Block the infinity NAG cicle!

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 22. Apr, 2004
Downloads: 1533

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Solutions

Solution by LuCiFeR, published 15. aug, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by xyzero, published 24. apr, 2004; download (9 kb), password: crackmes.de or browse.

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AttilhaZ's Crackme05

Download crackme05.zip, 4 kb (password: crackmes.de)
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Find the correct serial for it!

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 22. Apr, 2004
Downloads: 1910

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Solutions

Solution by LuCiFeR, published 25. apr, 2004; download (1020 b), password: crackmes.de or browse.

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Solution by hacnho, published 24. apr, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by xyzero, published 24. apr, 2004; download (681 b), password: crackmes.de or browse.

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AttilhaZ's Crackme06

Download crackme06.zip, 4 kb (password: crackmes.de)
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Change the caption of the DEMO VERSION label!

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 22. Apr, 2004
Downloads: 1995

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Solutions

Solution by juza, published 27. feb, 2012; download (6443 kb), password: crackmes.de or browse.

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Solutions

Solution by xyzero, published 25. apr, 2004; download (30 kb), password: crackmes.de or browse.

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AttilhaZ's Crackme10

Download crackme10.zip, 3 kb (password: crackmes.de)
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Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 29. Apr, 2004
Downloads: 1007

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Solutions

Solution by LuCiFeR, published 15. aug, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by myllan, published 02. may, 2004; download (831 b), password: crackmes.de or browse.

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AttilhaZ's Crackme11

Download crackme11.zip, 5 kb (password: crackmes.de)
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Solutions

Solution by kRio, published 26. jun, 2004; download (4 kb), password: crackmes.de or browse.

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AttilhaZ's Crackme16

Download crackme16.zip, 4 kb (password: crackmes.de)
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Cd-Check.

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. May, 2004
Downloads: 1362

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Solutions

Solution by ZeroZero, published 13. may, 2004; download (25 kb), password: crackmes.de or browse.

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Solution by myllan, published 13. may, 2004; download (5 kb), password: crackmes.de or browse.

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Solution by Plasmator, published 12. may, 2004; download (9 kb), password: crackmes.de or browse.

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AttilhaZ's Crackme17

Download crackme17.zip, 4 kb (password: crackmes.de)
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Another Cd-Check

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. May, 2004
Downloads: 1229

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Solution by Plasmator, published 12. may, 2004; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

Borgiman 13. Dec 2012	i tried to get this running many hours, but i didn't get it... so i read the tutorial of Plasmator and he has written, that in the call 40214E it compares the label of our drive to a given value. but the program won't run to it - i can't analyse why, cause i've no clue what some of the vb calls are doing, like vbaHresultCheckObj is it maybe something with my computer configuration?

Borgiman 27. May 2014	After several hours i finally managed to write a keygen - i'm a newbie reverser and personally i find vb a bit more complicated to understand. But i learned much of it.

AttilhaZ's Crackme21

Download crackme21.zip, 5 kb (password: crackmes.de)
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name/serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 12. May, 2004
Downloads: 848

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Solutions

Solution by xyzero, published 15. may, 2004; download (18 kb), password: crackmes.de or browse.

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Borgiman 28. May 2014	very similar to crackme20 with some string changes and serial-lookalike routine

AttilhaZ's Crackme22

Download crackme22.zip, 5 kb (password: crackmes.de)
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name/serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 12. May, 2004
Downloads: 862

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Solutions

Solution by xyzero, published 14. may, 2004; download (17 kb), password: crackmes.de or browse.

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Discussion and comments

Borgiman 29. May 2014	again, very similar to the other crackmes from you, with a different sort of formatting the serial :)

Solution by acruel, published 12. jul, 2016; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

acruel 03. Mar, 17:21	Kind of weird. Anyway, I got the output.
Extreme Coders 05. Mar, 09:38	Exploiting buffer overflow. any 10 letter username followed by [alt + numpad 3] any password
acruel 05. Mar, 11:49	@Extreme Coders Not exactly. .text:00402D19 mov ecx, [ebp+var_3C] .text:00402D1C cmp [ebp+var_40], ecx .text:00402D1F jz loc_402DFC
avatar Author 05. Mar, 19:50	@Extreme Coders: what is the [Alt + numpad 3] supposed to produce? I believe it's Ctrl-C (ASCII ETX) which will terminate the program. Your solution does not work for me.
Extreme Coders 05. Mar, 20:12	@avatar: alt + numpad 3 = ♥ Try this: username: 0123456789♥ pass: 123
avatar Author 06. Mar, 01:11	@Extreme Coders: nice
masihamasiha 04. Apr, 10:08	hi @avatar. I analyzed the code. the user must contain 11 character. the ASCII code for 11th char must be between 0 and 10 excluding 0 and 10 themselves. ---------------------------------------------------------------- here is the logic in code: MOVZX EAX,BYTE PTR DS:[User 11th char] TEST AL,AL JZ 00402DDD MOVZX EAX,BYTE PTR DS:[User 11th char] CMP AL,0A JA 00402DDD MOVZX EAX,BYTE PTR DS:[User 11th char] TEST AL,AL JZ SHORT 00402D19 none of the jumps mus not be taken. ------------------------------------------------------------- I tried the tab key as the 11th character whose ASCII code is 9 and it is working.
masihamasiha 04. Apr, 10:10	I forgot to mention that the password can be everything.

Axel.NET's parts

Download Parts.zip, 5 kb (password: crackmes.de)
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It is composed by 2 parts so that I choosed the name Parts it has been written using C# other info can be found inside the rules.txt and inside the .exe there is a button called "rules" it will explain all!
Good Luck Have Fun

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 20. Mar, 2011
Downloads: 608

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Solutions

Solution by JеRRy, published 14. apr, 2011; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

Cooty125 20. Mar 2011	Hi Why you have a random in static key() method? My solution works, but must clicked Check for more times -> For Sucess! Sorry for my english.
Cooty125 20. Mar 2011	DateTime now = DateTime.Now; int num = Convert.ToInt32(now.Second); int num2 = Convert.ToInt32(now.Minute); int num3 = (num + num2) / 2; if (num3 == 0) { return num3; } Random random = new Random(); return (random.Next(10, 40) + 40);
idid231 20. Mar 2011	Hey, i'm newbie in .Net and i don't think it's for newbie like me. As Cooty125 said, you used random function to make serial if (second + minute) / 2 != 0 ; so it's mean i should keygen this kgm "on time" ??? I think the rule should change from keygen or selfkeygen to only Patch is allow!
Cooty125 20. Mar 2011	@idid231 Yes! How he can use a random and time span in serial? :D
Axel.NET Author 20. Mar 2011	ahah guys i see you are in difficult ok I give you a tip I said you can patch 3 instructions: so answering to Cooty125: u posted my method to get the key ok --> obviously here you have to patch something....there is a if-else construct !!!!! think about it, I said in the Rules.txt you have to patch with a particular instruction....br.....!! If I say more I solve it by myself!!!
Cooty125 20. Mar 2011	OK I understand. I try make any else solution. Thanks and sorry for my retardation xD
idid231 21. Mar 2011	Well, seem i don't understand your mind :D Wait your solution about keygen :)
Axel.NET Author 25. Mar 2011	hey guys Soon I will post a new KeygenMe this time I've Used a packer/obfuscator coded by Me !! Good Luck have Fun -->Axel.Net
idid231 25. Mar 2011	packer/obfuscator? Well it's mean not for me, i don't know what is that =.= and how to unpack it :( Waiting solution for this crackme :)
Axel.NET Author 25. Mar 2011	hey I cannot upload a solution to my OWN crackme anyway look back at my tip I gave to Cooty125 I'm gonna give u a new Suggestion u will need Reflector obviously and Ildasm to solve my KeygenMe if u find other problems send me a private message I will give an help with something similiar to my keygenMe so U will have a sort of tutorial "a kind of guide" I mean
idid231 26. Mar 2011	About upload solution u should pm to mod in forum About your tut, i like it, but i think i should try again this kgm before have it, Thank you very much.
Axel.NET Author 26. Mar 2011	ahah no the tutorial wasnt about this keygenme in particular it was in a class of keygenme similiar to mine because these types of keygenme required a bit of MSIL the tutorial would pointing out MSIl in particular cya
rip06 27. Mar 2011	Hi guys, i got a (wrong)solution for the Parts crackme, i fixed the timer problem and found a way to see the serial but i didn't use the "br" function so the solution is not the right one.. But if you would like to know how pm me (maybe it will help you to make the right solution:)
Axel.NET Author 28. Mar 2011	that's right rip u are closely to the solution but the "br" come on man i'm sure u can defeat this using the br, I wish you the best
rip06 28. Mar 2011	i think a found a million solutions but not with a "br" is "br.true.s" okay ?
Nelix 28. Mar 2011	Why this strange rules? The rules with the br an the two parameters may work, but in reality this makes no sense.
Axel.NET Author 14. Apr 2011	well the solution has been accepted anyway my idea was replace parameters inside random funciton with a range of 0 and then make an assolute jump and the application wont crash it has been tested on my pc

a_k_47's PwnMe

Download pwnme.zip, 41 kb (password: crackmes.de)
Browse contents of pwnme.zip

Try generating a valid key for this crackme.
The executable file is also available for linux (is attached in the zip file also).

Have Fun!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 29. Jul, 2015
Downloads: 362

Rating

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Solutions

Solution by acruel, published 07. aug, 2015; download (83 kb), password: crackmes.de or browse.

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Solution by klefz, published 07. aug, 2015; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

acruel 04. Aug 2015	I've never played chess.
Delirium 05. Aug 2015	Would like to see a solution. 8 r n b q k b n r 7 p p p p p p p p 6 . . . . . . . . 5 . . . . . . . . 4 . . . . . . . . 3 . . . . . . . . 2 P P P P P P P P 1 R N B Q K B N R a b c d e f g h
freesoul 07. Aug 2015	I didn't go for understanding the IA inside the crackme, but I got the key playing chess. Solution is sent :)
o0xmuhe 16. Aug 2015	interesting cm~ But I 've never played chess...

b0ne's KeyMe#1

Download keyme_b0ne.zip, 294 kb (password: crackmes.de)
Browse contents of keyme_b0ne.zip

Hi Guys.

find the right key.
As there's not packer or any hard algo this could be something for beginners, but I think it's too hard for real n00bs.
but if you're noob:Feel free to try ;)

have fun with it, you need to guess a little bit but I think it's obvious after you gathered some information about the key.

let me know what you think

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: C/C++

Published: 09. May, 2007
Downloads: 549

Rating

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Solutions

Solution by Sunshine, published 22. may, 2007; download (14 kb), password: crackmes.de or browse.

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Solution by cmorbach, published 20. may, 2007; download (899 b), password: crackmes.de or browse.

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Discussion and comments

Ox87k 08. May 2007	i think there is a little bug in this point: 0040149B . 0110 ADD DWORD PTR DS:[EAX],EDX The variable in memory is zero only the first time you execute the appz. Maybe have you forgotten something like var=0; ? :)
b0ne Author 09. May 2007	well... you're right. but nobody's perfect. I uploaded the new version. enjoy ;)
Zaphod 17. May 2007	b0ne: I found a key that works, but from your ReadMe I get the impression that there is a 'better' key, a key that makes sense in some way. Is that so?
fjlj 17. May 2007	lol yes the keu make a lot of sense you need to look at the format of the key :) im gonna submit a solution now
Zaphod 18. May 2007	Okay, got it now! ( 4 = a )
yo-mismo 14. Apr 2011	Solved! Nice crackme

badRipper's NoChance KeyGenME

Download KeyGenME.zip, 222 kb (password: crackmes.de)
Browse contents of KeyGenME.zip

This Crackme is an Keygen. So you need to find out the way how the Keys are generated and write a tutorial. The complete Steps are listed in the zipfile.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 07. May, 2008
Downloads: 256

Rating

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Discussion and comments

TiGa 07. May 2008	The goal is to make a keygen for the keygenme that is already a keygen.
Ox87k 08. May 2008	Eheh he "stole" the idea i had in my mind for my next keygenme. Good job man, i'm working on it..
andrewl.us Moderator 08. May 2008	Self-keygen allowed? :)
badRipper Author 08. May 2008	What do you exactly mean with self-keygen?
Xspider 08. May 2008	i think self keygenning mean your keygen(ME) keygen himself, if i'm right!!
HMX0101 08. May 2008	Hey this one is easy :DD Btw, a question... why do you use Int64 if you never have values higher than 0xFFFFFFFF??? Just that ;)) Good challenge ;P
badRipper Author 09. May 2008	Again for all from info.txt: 1. Find my algo to generate the Keys (an info is in the application) 2. Look at the stored information in the registry and find out how to to do that entries 3. Write a tutorial how you did your job! 4. Write a new KeyGen with my algo to show that you have done your job! HMX0101: :D :D :D
badRipper Author 12. May 2008	Very hard stuff heh... ???

BadSector's CrackMe#1

Download crackme1.zip, 3 kb (password: crackmes.de)
Browse contents of crackme1.zip

The very first and very easy

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 19. Jan, 2003
Downloads: 3484

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Solutions

Solution by sk8r4life, published 22. jan, 2009; download (175 kb), password: crackmes.de or browse.

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Solution by _RiPTiDE_, published 16. feb, 2003; download (18 kb), password: crackmes.de or browse.

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Solution by *Sorcerer*, published 24. jan, 2003; download (7 kb), password: crackmes.de or browse.

*Sorcerer* has rated this crackme as nothing special.

Solution by Bytedevil, published 19. jan, 2003; download (728 b), password: crackmes.de or browse.

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Discussion and comments

BadSector's CrackMe #2

Download crackme2.zip, 3 kb (password: crackmes.de)
Browse contents of crackme2.zip

Enable button/find serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Jan, 2003
Downloads: 2897

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by _RiPTiDE_, published 16. feb, 2003; download (14 kb), password: crackmes.de or browse.

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Solution by bRaiN_faKKer, published 25. jan, 2003; download (5 kb), password: crackmes.de or browse.

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Solution by *Sorcerer*, published 25. jan, 2003; download (7 kb), password: crackmes.de or browse.

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Solution by _pusher_, published 25. jan, 2003; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

BadSector's CrackMe #3

Download crackme3.zip, 2 kb (password: crackmes.de)
Browse contents of crackme3.zip

Keygen this easy CrackMe

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 31. Jan, 2003
Downloads: 2856

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Apocalyps, published 10. feb, 2004; download (5 kb), password: crackmes.de or browse.

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Solution by _RiPTiDE_, published 16. feb, 2003; download (11 kb), password: crackmes.de or browse.

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Solution by *Sorcerer*, published 16. feb, 2003; download (11 kb), password: crackmes.de or browse.

*Sorcerer* has rated this crackme as nothing special.

Solution by bRaiN_faKKer, published 01. feb, 2003; download (6 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Borgiman 30. May 2014	nice crackme keys work only, if you start a fresh crackme instance if you try a key that's shorter than one you tried before, it won't be correct, because it doesn't clear the memory e.g. morpheuz YTBD-KLHE works morpheuz YTBD-KLHE works pablo NK?=-K doesn't work itfuckingworks RJOK_RAGABYJZG; works so, always start a fresh instance of a crackme, before you try it :)

BadSector's CrackMe #4

Download crackme4.zip, 3 kb (password: crackmes.de)
Browse contents of crackme4.zip

Find serial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 15. Feb, 2003
Downloads: 3070

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Solutions

Solution by cooller, published 18. feb, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by luucorp, published 23. feb, 2003; download (3 kb), password: crackmes.de or browse.

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Solution by _RiPTiDE_, published 20. feb, 2003; download (16 kb), password: crackmes.de or browse.

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Solution by elfz, published 18. feb, 2003; download (3 kb), password: crackmes.de or browse.

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Solution by Bswap, published 18. feb, 2003; download (883 b), password: crackmes.de or browse.

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Discussion and comments

BadSector's CrackMe #5

Download crackme5_bs.zip, 4 kb (password: crackmes.de)
Browse contents of crackme5_bs.zip

name/serial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Sep, 2003
Downloads: 2017

Rating

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Solutions

Solution by bRaiN_faKKer, published 11. sep, 2003; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

Borgiman 02. Jun 2014	for some reason i am unable to start the crackme. it gets loaded in memory and then exits. in ollydbg i see that it crashes at an int 68, but i don't know what this is. compatiblity mode changed nothing. any ideas?

StaTiX 21. Oct 2010	no this one is a challange for me. after 5 failed attempts i just changed the info msgbox to a jump to the correct serial messge :D thouth it freezes afterwords still searching for a way to crack it and im enjoing it.
adam master 01. Apr 2011	thanks for the crackme .. i will try to crack it.. and i think i will know jow.. since i downloaded alot of crack me in this website and i crack them successfully !!!
ideku_nih 06. Apr 2011	Look this two tiny modified case at address A55 and A74 change it from (75) to (74) make you feel good isnt it.

BadSector's KeyMe

Download bs.keyme.zip, 3 kb (password: crackmes.de)
Browse contents of bs.keyme.zip

nothing you can't handle

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 06. Aug, 2004
Downloads: 1479

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Solutions

Solution by bLaCk-eye, published 11. aug, 2004; download (18 kb), password: crackmes.de or browse.

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BadSector's Pick My Lock

Download crackme10.bs.zip, 3 kb (password: crackmes.de)
Browse contents of crackme10.bs.zip

This one is different than my previous crackmes. I tried to make it interesting but not too hard. This time you will deal with some
old and easy encryption methods. Not much of a challenge for crypto lovers but still coding a keygen could be a little tricky.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 27. Dec, 2004
Downloads: 1619

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Solutions

Solution by [Wizzer], published 11. jan, 2005; download (99 kb), password: crackmes.de or browse.

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Solution by jE!, published 11. jan, 2005; download (33 kb), password: crackmes.de or browse.

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Discussion and comments

BaKaE's CrackMe#1 by BaKaE

Download CrackMe1.zip, 255 kb (password: crackmes.de)
Browse contents of CrackMe1.zip

This CrackMe is my first one
so pleaze test it, send your solution and support me a little

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 11. Aug, 2006
Downloads: 946

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by jE!, published 02. oct, 2006; download (308 kb), password: crackmes.de or browse.

jE! has rated this crackme as quite nice.

Discussion and comments

Shism 12. Aug 2006	crashes for no reason
BaKaE Author 12. Aug 2006	if you got an error-page this is a part of this crack-me (read the readme.txt) you must patch only one byte to kill this error
BaKaE Author 12. Aug 2006	if you need a hint for this problem say it
Shism 12. Aug 2006	So the program is supposed to crash?
BaKaE Author 12. Aug 2006	yes i made it crashing and your task is to stop crashing (its not hard) sorry for my english
symbiont 12. Aug 2006	Why did your use MEW? I thought using pe-protectors is not allowed?
BaKaE Author 14. Aug 2006	sorry i did not knew that
BaKaE Author 18. Aug 2006	come on!! solve it! its not to hard
LAS3R 21. Aug 2006	sure thing was 1 byte, not to easy find doh, pure luck here!
BaKaE Author 25. Aug 2006	@ las3r did you find it?? good boy!!
BaKaE Author 31. Aug 2006	okay the solution for the error-page i renamed a section of this file. you need stud-pe, go to section, open the second one and patch the first byte ( 03 --> 02 ) now it worx. now sol it!!
jE! 31. Aug 2006	you mean byte at 40012C? this not works;
jE! 31. Aug 2006	ah, sorry, now prog unpacks in memory, nut crash happens in other place
BaKaE Author 01. Sep 2006	@ jE! work the prog??
jE! 01. Sep 2006	on W98 happend many crash.. finished unpk on XP; some explanations can you give? for example, must i remove comparision with 'nope'?
BaKaE Author 02. Sep 2006	i coded this prog in XP, if it not work on 9X, sorry. i cant explain how fix it for 9x. Crack it on XP back to Error-Page: open the prog with a hex-editor; go to offset 12C and patch the byte to 02 now it work
jE! 02. Sep 2006	hey, already did it; look above. so, must i remove final serial comparision with 'nope'? it looks like your programming fault.
BaKaE Author 04. Sep 2006	no!! don't nope serial comparision!! i testet the crackme and it hasn't programming fault here is a hint: it doesn't have only s/n protection!! (copy the part of the "programming fault" to a txt-file and sent it to bakae@web.de --> i check this)
jE! 04. Sep 2006	hey! don't warry, i will not nop your code:) Here is problem: @0046B588 happens final comparision os serial with string "nope"; but serial can't be string "nope". maybe you did somthing wrong?
jE! 04. Sep 2006	ha-ha! i viewed you CRACKme#3 understood your crackme#1.. all is ok:)
BaKaE Author 05. Sep 2006	hÃ¤? your are a little confuse now solv it complete and write a tut ps: how did you like my selfmade background-images ??
jE! 06. Sep 2006	yesterday written kg-s for both #1 & #3.. later will write tut.. i'm playng with setwindowtext in delhpi
BaKaE Author 02. Oct 2006	really nice work jE! but i didnt use INT2HEX (i didn't know this function) but yes, it was a little programming fault, sorry

BaKaE's CrackMe#3

Download CrackMe#3.by.BaKaE.zip, 285 kb (password: crackmes.de)
Browse contents of CrackMe#3.by.BaKaE.zip

thiz is my third CrackMe
It has a better protection, is not packed, and shouldn't crash

rulez:

1. don't use DeDe -->DONT
2. patching is allowed but not the algo or jumps

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 04. Sep, 2006
Downloads: 590

Rating

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Solutions

Solution by jE!, published 25. sep, 2006; download (65 kb), password: crackmes.de or browse.

jE! has rated this crackme as quite nice.

Discussion and comments

BaKaE Author 14. Sep 2006	no solution?? too hard, huh ?
BaKaE Author 25. Sep 2006	pleaze rate it jE! and thnx for cracking my #3
jE! 25. Sep 2006	rated as GOOD rated as GOOD rated as GOOD short comment not accepted???
BaKaE Author 26. Sep 2006	@jE! 1. your patch destroy the crackme (it doesn't work) 2. your keygen doesn't work with the original exe 3. your keyfile contents not that, what i expectat the right content is: This is a good KeyFile. Believe me. Test it if you Want!!!!!! How Did you like my CrackMe#3?? Please Mail me if got questions: bakae@web.de

BaKaE's CrackMe # 5

Download CrackMe#5.zip, 394 kb (password: crackmes.de)
Browse contents of CrackMe#5.zip

hello folks,

thiz iz my fifth CrackMe and my hardest one.
I hope you enjoy it :>

RuleZ:
1. patching NOT allowed (just patching with ressource-editors is allowed)
2. write a keygen
3. avoid to bruteforce
4. find the little EasterEgg (contains the name of another Cracker)

see ya

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 04. Nov, 2006
Downloads: 588

Rating

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Solutions

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Discussion and comments

BaKaE Author 13. Nov 2006	does someone need help??
ProTreeBrain 13. Nov 2006	I'll try solve it this week. I don't know if I do it. Look at my crackme. In my is allowed everything, but I like every break/code.
BaKaE Author 26. Jan 2007	no soutions? its to hard, or ?

BaKaE's CrackMe# by BaKaE

Download CrackMe#2.zip, 276 kb (password: crackmes.de)
Browse contents of CrackMe#2.zip

thiz is my second crackmes

i think it is a little bit harder than my first one

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 01. Sep, 2006
Downloads: 460

Rating

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Solutions

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Discussion and comments

BaKaE Author 14. Sep 2006	no one ?? pleaZE someone write a tutorial ?? im waiting
l0calh0st 14. Sep 2006	give some hints on enabling hidden controls
BaKaE Author 15. Sep 2006	use a ressource-editor i use always pe-explorer (good prog) you only set the enabled, and visible tag to "true"
l0calh0st 15. Sep 2006	Thanks it works...can it be done manually....Ok time to study more :)
ghostz 12. Oct 2006	Hi, BaKaE, I patched the crackme to display the following components: Edit1.visible := True; Edit2.visible := True; Edit1.ReadOnly := False; Edit2.ReadOnly := False; Button1.visible := True; I also follow the routine of Serial but I don't know if a Bad boy message or Good boy message displayed because the message close himself directly after my click with the crackme ! my serial = 20 characters. my question is : the good boy message closes himself if I entred the good serial ? or i must patch olso the message Winodow ? thx for your Help !
BaKaE Author 12. Oct 2006	hy sorry i cant test it yet coz i not at home but if your serial is correct it comes a good-boy message (title of this window) of not (bad-boy) it should close (or show nothing) this means your serial was NOT correct. if you want to wait until tommorow i can test it at home again and can you help again and may give some hints thx
ghostz 12. Oct 2006	Ok ;) I'm waiting ! Thanks
BaKaE Author 12. Oct 2006	but keep trying (don't sleep ;)) hints tommorow
BaKaE Author 13. Oct 2006	it tested it again it has nine times the close-order if something wrong this means you definitely typed the wrong serial hint: read the solutions for my #3 and #1 and than try again to crack this happy weekend
ghostz 13. Oct 2006	Ok ! Thank you for the hint ! ;)
BaKaE Author 26. Jan 2007	too hard to cracking ?? im ready to give some hints ;)

BaKaE's CracMe#4

Download CrackMe#4.zip, 333 kb (password: crackmes.de)
Browse contents of CrackMe#4.zip

Thiz is my fourth CrackMe, it should be harder, than my other CrackMes.

Rulez: 1. Have Fun
2. Don't patch any jump
3. Avoid to use DeDe
4. Avoid to give up

Thiz is all, now go on and Crack It

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 25. Sep, 2006
Downloads: 455

Rating

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Solutions

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Discussion and comments

geeko 26. Sep 2006	Hi too many rules. The fifth should be: 'Avoid to use a PC' :-) cheers
BaKaE Author 26. Sep 2006	two rulez are fun-rulez (avoid to give up and have fun) but you there right: "AVOID to use a PC, or something like that"
BaKaE Author 23. Nov 2006	hy, who changed my rulez, and why??
zairon Moderator 23. Nov 2006	BaKae, only mods can change the crackme rules. Maybe an error of one of us, don't know. I changed the box again. Tell me if it's ok.
BaKaE Author 23. Nov 2006	yes thanx zairon
BaKaE Author 26. Jan 2007	come on crackers pleaze crack thiz one, or did you need help ??

BaKaE's SerialMe #1

Download serialme.by.bakae.zip, 215 kb (password: crackmes.de)
Browse contents of serialme.by.bakae.zip

Thiz is my first Serialme

dont Patch (not needed)
just keygen it

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 25. Jan, 2007
Downloads: 1176

Rating

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Solutions

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Discussion and comments

BaKaE Author 22. Jan 2007	no solutions ?? too hard ??
Zaphod 22. Jan 2007	It's too early to say that it's too hard but it is certainly not "very easy", I think :) I'm working on it, though...
Zaphod 23. Jan 2007	I found a valid code ( serial fishing ), but it is not pretty ( some non-printable characters ) and I don't really know what's going on in this crackme. Still trying, though...
BaKaE Author 23. Jan 2007	ive got a keygen :D, coded with the crackme-source yes some nonprintable chars, to make it a little bit harder :)
Zaphod 23. Jan 2007	This is what I think I have found out: Serial is 20 chars, the first 16 generates the last four and these can be fished, but I still don't know how they are generated...
BaKaE Author 24. Jan 2007	correct!! the first 16 generate the 4 other one to make it harder to keygen it :) keep trying ps: i change it to level 2
Zaphod 24. Jan 2007	My valid code from yesterday is no longer valid! I discovered that the serial depends on the date, too. This crackme gets harder and harder - arrrrgh!
BaKaE Author 25. Jan 2007	hello i reuploaded the crackme to fix two things 1. no longer a "xxxx is not a valid Integer-Value" 2. after writing a char, the editbox wouldn't be cleared anymore @Zaphod the serial doesn't have 20 chars ;)
Zaphod 25. Jan 2007	Well, no - the serial itself isn't 20 chars, but the code I enter to the clipboard is :)
Kostya 30. Jan 2007	Solved.. :) Like it, but don't think that it is level 2 :)..Maybe 1.5 ?! :)
Kostya 01. Feb 2007	..I found ...easy way..( But doesn't work with digits :) cauze it has "Covert to hex entered digits" function ..
BaKaE Author 01. Feb 2007	you mean it work only with digits ;)
Kostya 01. Feb 2007	...No! ) I mean my solution :) works only with letters (not with digits), but now too lazy to rewrite it ....[ easy way, but works.. ;) ]
BaKaE Author 02. Feb 2007	but my keygen ignore all letters hope it will be approved, them im check this ;)

BaKaE's Sudoku by BaKaE

Download Sudoku.by.BaKaE.zip, 356 kb (password: crackmes.de)
Browse contents of Sudoku.by.BaKaE.zip

Thiz is a Sudoku-Game with an easy Registration-Part

it has three rulez
1. have fun while playing
2. have fun while cracking (you need ca. 10 min)
3. read at first the readme --> very important, cauz important infos about little bugs (sorry)

have fun !!!!

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 12. Sep, 2006
Downloads: 1240

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by geeko, published 15. sep, 2006; download (357 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 12. Sep 2006	nice one BaKaE, i vote it awesome!
red477 13. Sep 2006	Interesting crackme!
BaKaE Author 13. Sep 2006	this baby has a little bug (the game is unsolvable nice word) if the check-button is enabled and press the button it come always the "not solved"-message open it with olly and search the pleace there a number compared with 4F (dez:79) patch this to 51 (dez:81) --> the registration is bug-free !!
geeko 13. Sep 2006	why it reacts so slow on label.onclick?!?!
geeko 13. Sep 2006	it takes me 1 hour to fill the grid
BaKaE Author 13. Sep 2006	ive have a 2600+ Sempron and it needs 4-5sec to fill the grid and the label.onclick is not slow (maybe the check if all fields are filled check it on every label.onlcick) the prob is your pc is to slow and you need XP, sorry
geeko 13. Sep 2006	man, is too impossible slow. So: modify the call at 476712 to call 2 adresses lower. At that address overwrite with MOV eax,edx and it's done (i think, coz is slow to test). If this is right I'll write tuto
BaKaE Author 13. Sep 2006	the test check if label.caption<>' ' it means label.caption is filled with a number (this little check cant be slow) geeko what cpu did you have ??
geeko 13. Sep 2006	Intel 1500. So my CALL change is correct?
BaKaE Author 13. Sep 2006	maybe!! this call-change skip the test, but this test is only to avoid exception, cauz if press that button without all fields filled, it comes an exception (... is not an integer...)!! a tut for this call-change is not needed cauz its is only for slow pc's but you can write a tut for the registration-part (easy) --> and sorry for this problems <--
BaKaE Author 13. Sep 2006	ps: i have newer version of my sudoku :P my version has a "Solve it" button, that shows me the right entrys nice
geeko 14. Sep 2006	1. The call does not skip the test, as u will see in tut 2. I think I found why it is "slow". Your labels are autosize=true, so when are empty they are very thin and hard to click on it :-P (why u kill us?) 3. I changed 4f to 51 (at 4734a3), but it's the same 'not solved' message when it is correctly solved. Is it the wrong address or is it a bug in a bug?!?! 4. I've got no exceptions, never. Now can I write tut?
geeko 14. Sep 2006	The compare at 4734a3 is not always done with (esi) 51, sometimes with 41 or 49 or...what else? although the grid is correct. Is it a bug in your check routine!??
geeko 14. Sep 2006	please clarify that compare
geeko 14. Sep 2006	OK, man. 0x51=d81. the number of cells. It seems that u don't take into account that there are several solutions to sudoku and u check only the one solution u know. If u confirm this as a bug I'll write tut
BaKaE Author 14. Sep 2006	sometimes there are two or three solutions for the game,but you need the same solution that the game want!! -->try this fill the grid correctly and change one entry (the check test the first field, if right check the next, then the next,...) every right field a number increments, after finishing the test the counter must be 81 and you must be registered, so you must find the loop that check the counter with 4F (unpatched), i try your change at 47343a3 this evening, answer tommorow write a tut if you want, but upload it not today, upload it tommorow (maybe 15.09 or 16.09) after my answer the thing with the autosize is a standard attitude of borland and i didn't changed that, but thnx for that info
geeko 14. Sep 2006	I didn't understand: do u want me to crack your proggy or to find out the solution u expected? u don 't check the counter in a loop. u increment ESI for every correct number separately (it's a kinda unrolled loop), and chek it at the finish, right? and I found that compare right? What else should I do?
BaKaE Author 14. Sep 2006	1. i don't expect a solution, i mean the right grid-solution that the game want, thus the game said "solved" 2. you were right, the check is outside of the loop [ ?? = 51 ](i don't know which register has the counted number 3. the task of this crackme is only: enable the register-menu-item and enable it, then check out how it calculate the right number; if you had done this write a solution; if you want to write about other things in your solution (for example the patch 4F -> 51) do it 4. the last thing is (if you like): the right serial is a string of numbers and you must "convert" it to ASCII-signs, and it develops a sentence about my crackme ;-) (include it in your sol if you want) --> little question: what exactly did you mean with crack my proggy ??
BaKaE Author 15. Sep 2006	so i test you patch 1. the patch at 476712 is not necessarily, cauz the new msgBox only shows the "encrypted" sting, but you have the right encrypted string, you need to revrese the algo and decrypt the string to get the right serial number 2. the line is ca. cmp esi, 4f you must patch it to cmp esi, 51 than you're right (the line is easy to find)
geeko 15. Sep 2006	U gave too much hints, details. They wasn't necesary! I didn'n need nor use them. U didn't say we can't patch. I sent the tuto. Wait for moderators now. Pretty easy. Thanks I forgot something: 'This SudokuGame kjcks Ass' Moderators, don't delete this, coz part of the Bakae's request
BaKaE Author 15. Sep 2006	you mean ... kicks Ass not with j ;-) good work, and one question why: some easy puzzles to relax ?? why don't play Sudoku ?? :P btw, good work and test my other crackmes if you want
BaKaE Author 15. Sep 2006	oh one thing i forgot to hide the register-button, so it is a little easier, than planned
geeko 15. Sep 2006	is 'j' , not 'i'. U did a mistake. Coz your sudoku doesn't recognize all solutions, sorry.And labels are too thin. And it takes too much to generate the grid. :-) Other crackmes are too hard :) How would I register without button? Why don't u still work to my crackmes?. Noone solved them yet. If they are too hard I'll give you some hints.
BaKaE Author 15. Sep 2006	i dont make mistakes (little jokes), this sudoku was a weekend-project, so it was not enough time for another function that check if that grid right, or not and i was a little sleepy :), labels are thin, coz autosize (i believe) sorry, the reason why it takes too much to generate the grid: your pc is too slow (on my pc it needs 5 sec. or less) other crackmes are too hard ?? these are level 3 and you tried a level 5 (i mean magics one) "How would I register without button?" i mean to set the button not visible and you need to make it visible again i try your crackmes this weekend again, looking forward to solve some, bye
geeko 15. Sep 2006	5 secs. is a long time, on mine pc: the same time. I tried level 5 just to look at it from the distance and I got scared. Yes, but U had to tell me that there is a hidden button. Good luck. I will work on some other new crackmes
BaKaE Author 15. Sep 2006	what is your skill-level of cracking ?? mine is 1,5 - 2
geeko 17. Sep 2006	I don't know. That was my first aproved solution. and the second tried by myself at crackmes.de.
sd333221 03. Oct 2006	Sorry but the algo, you use to create a new Sudoku game is HORRIBLE! Brute Forcing...
BaKaE Author 04. Oct 2006	i know its horrible, but not horrible enough bruteforce it if ya want

balaiazataeara's BKeyGenMe 2007-1

Download BKeygenMe2007.1.zip, 141 kb (password: crackmes.de)
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This KeygenMe was coded in c++ and runs in a console environnement. Good luck on this one. The algorithm is pretty simple ;) Don't patch it, keygen it ;) Feel free to comment.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 04. Mar, 2007
Downloads: 598

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Solutions

Solution by cooller_ho, published 11. mar, 2007; download (95 kb), password: crackmes.de or browse.

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magdeburg 09. Jun 2006	Hi, I just had a look on this crackme and tried to solve it... However, I did not have a clue where to start and since I'm rather new to assembler and crackmes I read myllan's solution. The important tip is that you have to set a breakpoint at 004029CC and follow the CALL. You already see in EDX the right serials and it's quite easy... But I still don't know how you shall find this line in the code ... Are there any signs or something like that which point to 004029CC so that you start looking there ??? Or is it the result of patience and/or luck to find this call ?? thanks for any replies that might enlighten the problem a bit regards, magdeburg
crackpot1978 16. Apr 2008	Can't start the program - CC3250MT.DLL not found :O(
DigitalAcid 16. Apr 2008	Then download the dll, just google it and add it to the folder where the crackme is located.

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Discussion and comments

PrincessJade 05. Jul 2008	keygen made, but i've never written a yutorial before
costy 06. Jul 2008	I solved it. But what?? my friend PricessJade... So you are ready for your first tutorial. Congratulation. I don't write a solution I'm waiting for P.Jade's one. Anyway... About the crackme... You use a simple text comparision. That's bad becouse i can simply copy and paste the code in my Visual Studio and them write MessageBox(ExitProg("costy")) to have the right key for my name. But It's only the first one... so no problem.
obnoxious 06. Jul 2008	well if costy wants p.jade to write a tut so be it. p.jade looking 4ward to reading your tut :)
basfreak Author 06. Jul 2008	Ill be waiting :)
basfreak Author 06. Jul 2008	Haha, if you put nothing it works also, but i don't think that was your solution?
costy 06. Jul 2008	NO NO I solved correctly. Anyway you should write If text1.text ="" then Msgbox "Hey! Write a name" else ....
basfreak Author 07. Jul 2008	Maybe P.Jade don't even want to write a tut.
obnoxious 07. Jul 2008	p.jade go ahead and write a tut....... m waiting to read ur first tut. best of luck.........
costy 07. Jul 2008	I only suggested to her to write a tutorial. If she like... Anyway... It's clear that other people can write a solution.
sd333221 07. Jul 2008	It is really nothing special..... I still added a solution
Bispoo 07. Jul 2008	Keygenme solved, i made keygen, easy crackme as stated. nice job basfreak
basfreak Author 08. Jul 2008	Thanks, gonna make another one.
simonzack Moderator 16. Jul 2008	good job for 1st keygen basfreak :) solved

basfreak's RegisterProduct

Download RegisterProduct#Basfreak.zip, 11 kb (password: crackmes.de)
Browse contents of RegisterProduct#Basfreak.zip

You may only patch the disabled forms.
Make a keygen.

-Greetz

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 08. Jul, 2008
Downloads: 371

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by obnoxious, published 13. jul, 2008; download (228 kb), password: crackmes.de or browse.

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Discussion and comments

sd333221 08. Jul 2008	This is really not a 2, you only have to take the routine and put it into your project
simonzack Moderator 16. Jul 2008	omg, I spent more time entering the serial than solving it ~.~

basilik's crackme #1

Download bas_cm1.zip, 8 kb (password: crackmes.de)
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name/company/serial, anti-si/wdasm/sc

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Dec, 2000
Downloads: 2023

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Solutions

Solution by mccool, published 02. dec, 2000; download (199 kb), password: crackmes.de or browse.

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Discussion and comments

batman10's Crackme_1

Download crackme_1.zip, 3 kb (password: crackmes.de)
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My first crackme!

No patch, make a keygen!

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 10. Dec, 2015
Downloads: 819

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Solutions

Solution by rsumi, published 19. jan, 2016; download (6 kb), password: crackmes.de or browse.

rsumi has rated this crackme as quite nice.

Solution by arlkers, published 19. jan, 2016; download (587 b), password: crackmes.de or browse.

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Solution by Himsord, published 19. jan, 2016; download (948 b), password: crackmes.de or browse.

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Solution by acruel, published 19. jan, 2016; download (865 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

reflection 01. Apr, 20:15	What the hell. If I didn't miss something, I just tried "c" and "f" as totally random inputs - and it says "Good"

bbidhan's b@h0n

Download 2.zip, 214 kb (password: crackmes.de)
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Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 10. Dec, 2005
Downloads: 634

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Solutions

Solution by Ox87k, published 13. dec, 2005; download (119 kb), password: crackmes.de or browse.

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bbidhan's [Bid]haN666

Download Crack_me_2.zip, 31 kb (password: crackmes.de)
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This crack me is only for professionalz.

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: (Visual) Basic

Published: 22. Nov, 2005
Downloads: 715

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by modchip, published 24. nov, 2005; download (58 kb), password: crackmes.de or browse.

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Solution by konstAnt, published 23. nov, 2005; download (31 kb), password: crackmes.de or browse.

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Discussion and comments

bigboss1988 22. Nov 2005	lol, Nice CrackMe:) Dll files have a Tricks ;) try change name Dll file and run crackme and ill know The Baby :D
konstAnt 22. Nov 2005	Ha..ha.... That's an easy one solution'll be given fast...
bigboss1988 22. Nov 2005	heheh konstAnt :D
konstAnt 23. Nov 2005	He...he.... solution submitted.... a nice trick discussed in the tutorial...
tommy 23. Nov 2005	i thought it was very easy =)
modchip 24. Nov 2005	nice dll trick.. heheehe, submitted solution too. :)

bbidhan's cRå©k Më after a long long time; try to solve

Download cRå©k_Më.zip, 16 kb (password: crackmes.de)
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Crackme after a long time.

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 15. Jul, 2008
Downloads: 318

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

DigitalAcid 24. Jul 2008	I don't think that this one can be solved. It is comparing with a value wich cannot be reached without patching.
costy 28. Jul 2008	I think what wrote DigitalAcid is true
DigitalAcid 28. Jul 2008	We heard you the first time :P.
Xspider 28. Jul 2008	:lol: that's flood :p
costy 28. Jul 2008	Sorry. I didn't want to post twice.
obnoxious 29. Jul 2008	.......and the spam filter keeps on caling me n tells me that it does not like me ;)
mjesun 24. Nov 2008	Of course, the __vbaVarTstEq of 0040F6AC is comparing an integer (word, type 02h) against a double (64bits, type 8005h). After executing the function, the double number is aproximately 775, but it's not exact. There is a very small error that causes the ollydbg to show 775.00000000, but that's not true. Thus, as DigitalAcid says, it has not solution.
mjesun 24. Nov 2008	Hm, I forgot to explain that the integer of the comparasion is the addition of all the ASCII char codes of the password. You can check what I want to mean by compiling this code: Dim a As Double a = 774.99999999999 b = 770 + 5 If a = b Then MsgBox a Obviously there will be no MsgBox, but at olly the returned value is 775.

bbidhan's Keygenme#3#

Download 1.zip, 8 kb (password: crackmes.de)
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Write a keyGeneretor for me.

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 10. Dec, 2005
Downloads: 862

Rating

Votes: 8
Crackme is quite nice.

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Solutions

Solution by HMX0101, published 27. dec, 2005; download (164 kb), password: crackmes.de or browse.

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Solution by microplant[mp], published 26. dec, 2005; download (211 kb), password: crackmes.de or browse.

microplant[mp] has rated this crackme as quite nice.

Solution by EsKiMo, published 26. dec, 2005; download (14 kb), password: crackmes.de or browse.

EsKiMo has rated this crackme as awesome.

Send a message to bearchik »

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Discussion and comments

Tenshi 21. Dec 2005	this is crapp....how will u make an key gen if the key is time beased ???? first an "U" u take seconds for example "40" then u take last to chars of the date ( for example 19-12-2005 = "05") And then "Grand-Theft-Auto-Vice-Citybbidhan-ThE-Great" so u have U+Sec+Year+String = serial greets ps: i wil build an fischer if i could i would post it here....
Tenshi 21. Dec 2005	sorry the "U" is the first char of name + 1 exmpl. "T" -> "U", "3" -> "4"
konstAnt 22. Dec 2005	Wow I also found that I'll also write a solution
EsKiMo 22. Dec 2005	The crackme is quite interesting. Although the serial generation is easy to understand, creating the KeyGen is not so easy! Submitted a solution.
Tenshi 23. Dec 2005	the only thing u can do is to "froze" the time when the keygen is started.when the keygen is closed the "real" time has to to be set. the problem is that the keygen must run to work ;-)
konstAnt 23. Dec 2005	Yah that was my idea too but I didn't get favourable condition to write a tut due to college days
Tenshi 23. Dec 2005	there is an other idea from me, combine an loader and an key gen....load the crackme and than alway let him think that the seconds are "00" and then the keygen should work to..... its easyest way i think ;-) maybe i will write an solution....
EsKiMo 23. Dec 2005	Or... you could generate the serial based in the current time. Write a loader that read the username typed in the crackme, compute the serial and set it back in the keygen textbox! You have to do this procedure for every second. This way you don't change anything in your OS neither in the crackme. I think the author was excepting something like this. That's the solution I submitted.
Tenshi 24. Dec 2005	buts not that effektive like the first idea, its the fastest and best way in my mind, but u are right u could do..... greets
konstAnt 25. Dec 2005	Another easy way is tell the user to click the button only when the clock rings the correct time :P :lol
HMX0101 25. Dec 2005	other way, make a small app for click the button
microplant[mp] 26. Dec 2005	ok, the serial was pretty easy to find, but the keygen took me a while ^^ well, its finally ready and sent as solution :)
Tenshi 26. Dec 2005	nice solutions.....merry christmas ;-)
konstAnt 28. Dec 2005	Merry Christmas???? Happy New Year ... :P :lol
modchip 29. Dec 2005	offtopic: Happy new year to all of you!
mks2064 02. Sep 2009	really good one Bidhan

bearchik's Errors Keygenme

Download errors_keygenme.zip, 3 kb (password: crackmes.de)
Browse contents of errors_keygenme.zip

Hi. This is very small and easy program. It is using famous match algorithm for create key.
But I used small triks to make keygenme interesting.

Best regards, Bearchik.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 21. Nov, 2012
Downloads: 305

Rating

Votes: 3
Crackme is good.

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Solutions

Solution by rmolina, published 08. jan, 2013; download (199 kb), password: crackmes.de or browse.

rmolina has rated this crackme as awesome.

Solution by demoth, published 08. jan, 2013; download (7 kb), password: crackmes.de or browse.

demoth has rated this crackme as awesome.

Send a message to BeatriX »

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Discussion and comments

demoth 27. Nov 2012	It was an interesting keygenme. Thank you.
bearchik Author 28. Nov 2012	All for You. I hope You got fun. :)
idid231 04. Dec 2012	Nice shoot! :D Thank you.
bearchik Author 05. Dec 2012	Good work idid231. :) I want see solution. Moderators where are you? :)
idid231 05. Dec 2012	Not as you thought, i just patch it :D I need more time to solve your cm, hope i will have my final sol.
demoth 08. Dec 2012	I'm wait for submitting my solution since 27 nov...
demoth 08. Dec 2012	http://rghost.ru/42089030 It is my solution. Admins, delete it post, when confirm it on site.
bearchik Author 10. Dec 2012	2demoth Nice solution! :) Thanks.
rmolina 13. Dec 2012	Hi, I just solved this one in python :) and after testing I found at least one case where my keygen does not work. It is something related with both spaces and single quotes but I am not sure about the cause. As I saw another solution posted, I checked that one too. I failed too. In fact, it looks like demoth's solution fails for a few more cases than mine: demoth: Name: 'a ' Yours key: 72L4OO4L8963200143M1 [incorrect] mine: C:\Python27>python errors.py name: 'a ' 5L64NJ9M8M471K09017K [correct] demoth: Name: ' 'a Yours key: 6M8KO75123O74L3J8221 [incorrect] mine: C:\Python27>python errors.py name: ' 'a Traceback (most recent call last): File "errors.py", line 138, in <module> n = int( r[8 * i + 7 - j * 2], 16) IndexError: string index out of range lol :) The expected serial is: 1JK5NO38K7NMLO0ON151 I am going to trace the error and will report what I found. In the meantime, I am rejecting quotes in the name, hahaha. Really nice keygenme bearchik! Thanks a lot :) BTW, I still don't recognize the match algorithm.
rmolina 13. Dec 2012	It was a bug in my code :P It is working now :)
demoth 13. Dec 2012	Hmm... You're right. I'll find the bug in my keygen tomorrow...
demoth 13. Dec 2012	Lol.... scanf incorrectly read string with quotes... %) scanf("%55s", name); needs replace with gets((char *)name); I used scanf because it is safer.
demoth 13. Dec 2012	http://rghost.ru/42226980 - fixed version of my keygen.
rmolina 14. Dec 2012	thanks for let us know the cause of the bug, demoth. And BTW, your keygen still fails for non-ascii chars: Maybee that is not very important for english speakers, but it was needed for my name hehehe :) yours: Name: rubén Yours key: 6LN822M73LKOJ3KJK2MJ [incorrect] mine: Name: rubén 20K26N29O23213452L96 [correct] AFAIK it is related with the character encoding, if I run my script in console mode (python.exe) it gives me the same bad result you got there. If I run it from the windows IDE (pythonw.exe) the serial is correct.
bearchik Author 14. Dec 2012	Congratulation rmolina. I can give small hint about main algorithm. :) Algorithm published in 1995. In 2005 this algorithm was cracked but It continues to be used in many programs now. If You wish, I can publish my source code after approval all your solutions. :)
bearchik Author 09. Jan 2013	As I promised - source code. http://rghost.ru/42857119
cryostat13 05. Feb 2013	dead link may reupload
bearchik Author 06. Feb 2013	Only Source on PasteBin - http://pastebin.com/xpUkSbH4

BeatriX's BeaBA

Download BeaBA.zip, 21 kb (password: crackmes.de)
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Windows x64 crackme.
it is a little obfuscated. Some maths too...Not so difficult in fact but surely a bit funky :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 09. Apr, 2007
Downloads: 516

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Solutions

Solution by pnluck, published 03. aug, 2008; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

Shism 10. Apr 2007	i think the exe is corrupted..
BeatriX Author 10. Apr 2007	i think this exe works fine on my xp pro x64 ;)
EvOlUtIoN 10. Apr 2007	nope, it is not working on WXP sp2
TheColonial 10. Apr 2007	It's a 64-bit exe. BeatriX obviously failed to mention that in the summary.
BeatriX Author 10. Apr 2007	yes, i didn't think it could be a problem. Sorry for this lack of information. Maybe it could be interesting for moderators to create a new category "windows x64".
zairon Moderator 10. Apr 2007	Beatrix: it's already in our to-do list :) I added a note in the crackme description: "Windows x64 crackme.". Ok for now.
pnluck 21. Jul 2008	I resolved it!! I'm just writing the tute ;) "it is a little obfuscated" <-- was it an euphemism??
BeatriX Author 24. Aug 2008	thanks for your nice solution pnluck :) Obfuscation is not hard because you can recognize it with static patterns (as you explain in your tuto) but you are right, there is a lot of junk in this crackme :)

BeatriX's blackmamba

Download BLACKMAMBA.zip, 105 kb (password: crackmes.de)
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this crackme is a multi-multi-threaded binary and is a small example of a petri nets implementation. You have to find the right password.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 05. May, 2008
Downloads: 487

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by TaGaDaPaF!, published 31. may, 2008; download (9 kb), password: crackmes.de or browse.

TaGaDaPaF! has rated this crackme as quite nice.

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Discussion and comments

andrewl.us Moderator 01. Jun 2008	Very nice solution, TaGaDaPaF! Disassembly -> Regexes -> Boolean solver == very cool!!
Ox87k 01. Jun 2008	Yeah, great solution TaGaDaPaF! I'm learning something new for me.. Thanks you and thanks to BeatriX for this another exelent crackme.
BeatriX Author 02. Jun 2008	huhu, good job TaGaDaPaF. Your simplification is very nice. I am astonished with your solution because you find 8 solutions but a the beginning, I have implemented this petri net thinking there is only one solution ! The worse is that my solution isn't one of yours ! And now, I fear there are much more solutions. I just try to understand where is the error. I am going to write something to explain how I have coded this crackme and specially what is the petri net scheme.
cracker_bug 23. Sep 2013	I've been working on this for a while. I finally decided to cheat and glance at TaGaDaPaF's solution. I've been wading through the antidisasm for an hour, and he just calmly nukes it all with a find and replace. D'oh!

BeatriX's octopus

Download OCTOPUS.zip, 12 kb (password: crackmes.de)
Browse contents of OCTOPUS.zip

This crackme is coded in asm and compiled with masm32. It is protected against analysis with some easy junkcode. It is not the real difficulty here but it can be a good introduction to learn how to defeat obfuscation. The register scheme is quite funny I think :) There are no maths, no crypto, no anti-debug tricks.

2. What must I do ?
===================

a) You just have to find the right password !
b) Try to find why this crackme is called "octopus" ;)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 05. Jul, 2008
Downloads: 3137

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by jE!, published 09. jul, 2008; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

basfreak 06. Jul 2008	Im a noob but i found: ASCII "=::=::" And 3 msgboxes with wrong serial Also that you need a file I tried passing by the msgboxes but it didnt work
BeatriX Author 06. Jul 2008	ok :) try to understand how the crackme uses the file. MsgBoxes are not really useful I think.
basfreak 06. Jul 2008	I think the password must be inside. After getting the size of the file it checks if the size is above 500kb isnt it? CMP EAX,1F4 JA SHORT octopus.00401426 if so it jumps to 00401426 wich says: PUSH DWORD PTR DS:[40C25A] CALL <JMP.&kernel32.CloseHandle> close the file after closing the file it shows a msgbox and exit. Am i right?
basfreak 06. Jul 2008	Ah, i think i've got an idea. The file-size must be onder 500kb?
BeatriX Author 06. Jul 2008	basfreak, stop investigations in this forum :) use private messages if you need hints.
basfreak 06. Jul 2008	Ok you may remove my comments
jE! 07. Jul 2008	so unhappy i was on no other crackme :(
BeatriX Author 09. Jul 2008	waow :) incredible solution jE! ... all is done only by hand ! my god :) So, I have to conclude that it wasn't enough complex to discourage you ;) thank's for this solution. Did you find why this crackme is so called "octopus" ?
Ox87k 09. Jul 2008	@BeatriX: Read the last line on jE's solution :P @jE: Very good work! Thanks for the solution!
BeatriX Author 09. Jul 2008	"Read the last line on jE's solution :P" hihi, yes, off course, nice idea but...there is really an octopus somewhere in this crackme :)
simonzack Moderator 04. Aug 2008	sorry, I'm really a noob, but where does int3 return to? I know it's somehow used to intercept programs for debugging, but i don't know where it leads, and can't trace at all. I read jE's solution and don't know how all the different paths came by. Can somebody help me???
BeatriX Author 24. Aug 2008	int3 generates an exception catched by the SEH Handler installed by the program itself. You just have to put a BP on the entry of that handler and trace into it once the exception occured
simonzack Moderator 31. Aug 2008	thanks, i get it now, shoud've read je's tut a bit more :p
simonzack Moderator 25. Jan 2009	finally solved this by myself after trying it again after so long time my keyfile was 120 bytes! :) thanks for great crackme, one of my favourites

Beaving's Beavme

Download BeavmeUPDATE.zip, 5 kb (password: crackmes.de)
Browse contents of BeavmeUPDATE.zip

Crackme by Beaving (ICQ: 806899 MSN: beaving@freenet.de)

Some anti-patches

Rules:

- no bruteforcing

Mission:

- try to patch it and/or make a keygen

It's my first crack me and I use some lameish methods but see urself ;)

I'm coding for 3 months now.

Example:

Firstname: Beaving
SerialNr: 7230775

(info: serial is int)

MODERATOR NOTE: try for keygen

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 26. May, 2009
Downloads: 349

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by indivisible_int, published 12. jun, 2009; download (14 kb), password: crackmes.de or browse.

indivisible_int has rated this crackme as nothing special.

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Discussion and comments

The So;X 27. May 2009	I got an error "Application has failed to start because application cofig is incorrect"
Beaving Author 27. May 2009	Hey, it is working fine for me and 2 friends of me. If you tried to patched it and start the Crackme then it will probaly simply crash.
dotatoad 01. Jun 2009	thank you very much i started reverse engineering about 2 weeks ago.... BTW this was my first crackme and i managed to patch it is so unbelievable!!!!!! ok i managed to patch it but not make a keggen.... xD BUT I MANAGED TO PATCH IT (for me this is a big deal since it was my 1st crackme)
Zaphod 01. Jun 2009	I got the same error as So;X - it won't run on my computer.
Beaving Author 01. Jun 2009	If it doesn't run you may need this package: http://www.microsoft.com/download/BeavmeUPDATE.zips/details.aspx?FamilyID=9b2da534-3e03-4391-8a4d-074b9f2bc1bf&displaylang=en
Beaving Author 01. Jun 2009	It is working for me, few friends, the moderator here and dotatoad, though.
MCxCodex 03. Jun 2009	Yes, it works fine. For who don't have VS2008, Redistributable Package are needed.
indivisible_int 09. Jun 2009	I think it's easy to patch it... but why is it nesessary? I don't like such crackmes))

beBoss's beBoss - KeyGenMe #1

Download beBoss_-_KeyGenMe_#1.zip, 509 kb (password: crackmes.de)
Browse contents of beBoss_-_KeyGenMe_#1.zip

This is my first KeygenMe. It's very old project, but I never posted on the internet. So this is the moment :)

Description:
Not packed, no cryptos, no hashes, just a little math :)

Rules:
1. Keygenning is the ultimate goal
2. Self-Keygenning and Phishing are more than welcome
3. Tutorials and tips are welcome
4. No patching.

yeah I think is not for really noobs, but it is really easy !!!
I hope to see keygens, source codes (ofcourse if you are not stingy - "close-fisted") and tutorials.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 14. Jan, 2011
Downloads: 659

Rating

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Solutions

Solution by draww, published 15. jan, 2011; download (22 kb), password: crackmes.de or browse.

draww has rated this crackme as nothing special.

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Discussion and comments

beBoss Author 15. Jan 2011	draww, good job ! :)
draww 15. Jan 2011	thank you.. thanks for taking time and making this CM.. make next one harder ;)
beBoss Author 15. Jan 2011	I will. This is my first, and it's so old, I made it before two or three years.
draww 15. Jan 2011	yes i read it in the intro part ;) it may be old but still ok.. at least worth to try.
Insaene 17. Jan 2011	I have no clue how to keygen, Im new to cracking. What I did do was switch: MOV EAX, 4B5BC8 with MOV EAX, 4B5C1C
draww 18. Jan 2011	@Insaene: you can read tut and see sources ;)

Beezdul's Keygenme #1

Download Keygen.Me.#1.RABiD.zip, 192 kb (password: crackmes.de)
Browse contents of Keygen.Me.#1.RABiD.zip

This crackme / keygenme was made in .net; have fun cracking it! Rules : NO PATCHING!, no selfgen. You need to make a cool keygen with cool graphics and an epic chiptune. Cheers!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 08. Feb, 2012
Downloads: 1064

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Xartrick, published 10. feb, 2012; download (163 kb), password: crackmes.de or browse.

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Solution by Beezdul, published 10. feb, 2012; download (752 kb), password: crackmes.de or browse.

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Discussion and comments

repwn 08. Feb 2012	yay, I cracked it, now I just gotta add all the fancy graphics and stuff
Beezdul Author 09. Feb 2012	Finally approved after what? 5 months? Well, site's back up :)
Xartrick 09. Feb 2012	Solved. Sent a cool kg without chiptune or gfx and the solution of course :p
mausy131 18. Apr 2012	You can find the algorithm very easy with Reflector. I only need to know how to write a good Keygen...
M45T3R5_ 26. Jun 2012	Cracked, now need to find an epic chiptune...
br0seph 28. Mar 2013	Nice and simple :)
kranked 29. Oct 2014	Nice crackme... thank you
tygrvrli 26. Mar, 13:28	Solved. And C#.Net Keygen Code, private void button1_Click(object sender, EventArgs e) { string key = ""; string CharPart = RandomString(4); key += CharPart + "-"; string middle = (((int)key[0])+((int)(key[2]))10+3324).ToString(); key += middle + '-'; string last = (((int)key[1]) + ((int)(key[3])) 10 + 1000).ToString(); key += last; textBox1.Text = key; } public static string RandomString(int length) { const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; var random = new Random(); return new string(Enumerable.Repeat(chars, length) .Select(s => s[random.Next(s.Length)]).ToArray()); }

bengaly's crackme #1

Download bengaly_crkme.zip, 3 kb (password: crackmes.de)
Browse contents of bengaly_crkme.zip

name/serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 13. Sep, 2001
Downloads: 3915

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by tJw, published 11. jun, 2003; download (2 kb), password: crackmes.de or browse.

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Solution by zairon, published 13. sep, 2001; download (33 kb), password: crackmes.de or browse.

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Solution by j!m, published 13. sep, 2001; download (32 kb), password: crackmes.de or browse.

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Solution by yar0n7, published 13. sep, 2001; download (14 kb), password: crackmes.de or browse.

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Solution by tnhuan, published 13. sep, 2001; download (10 kb), password: crackmes.de or browse.

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Solution by nordic, published 13. sep, 2001; download (10 kb), password: crackmes.de or browse.

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Solution by load runner, published 13. sep, 2001; download (3 kb), password: crackmes.de or browse.

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Solution by mankind, published 13. sep, 2001; download (7 kb), password: crackmes.de or browse.

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Solution by philippe, published 13. sep, 2001; download (2 kb), password: crackmes.de or browse.

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Solution by delight, published 13. sep, 2001; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

crackpot1978 16. Apr 2008	The Program didn't start.
TiGa 16. Apr 2008	The Program didn't start for YOU, don't generalize it.
kostya_ 17. Dec 2009	The program started, but don't show window. However if run program in OllyDbg, Window will be showed.
phylixal 09. Mar 2013	no windows showed, and never exit. I have to kill it in tskman

bengaly's crackme #2

Download bengaly_km2.zip, 53 kb (password: crackmes.de)
Browse contents of bengaly_km2.zip

name/serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Oct, 2001
Downloads: 3104

Rating

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Solutions

Solution by Apocalyps, published 05. dec, 2003; download (59 kb), password: crackmes.de or browse.

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Solution by detten, published 11. oct, 2001; download (38 kb), password: crackmes.de or browse.

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Solution by prof.x, published 11. oct, 2001; download (2 kb), password: crackmes.de or browse.

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Solution by [xorolc], published 11. oct, 2001; download (26 kb), password: crackmes.de or browse.

[xorolc] has not rated this crackme yet.

Solution by xtrem1st, published 11. oct, 2001; download (6 kb), password: crackmes.de or browse.

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Solution by stealth fighter, published 11. oct, 2001; download (7 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

crackpot1978 16. Apr 2008	I can't download the Crackme. My AV says "Virus".
TiGa 16. Apr 2008	It's a false-positive. Reverse it and you'll see by yourself.

bengaly's crackme #3

Download bengaly_km3.zip, 41 kb (password: crackmes.de)
Browse contents of bengaly_km3.zip

name/serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 23. Nov, 2001
Downloads: 3189

Rating

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Solutions

Solution by detten, published 23. nov, 2001; download (3 kb), password: crackmes.de or browse.

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Solution by minos, published 23. nov, 2001; download (2 kb), password: crackmes.de or browse.

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Solution by nitrus, published 23. nov, 2001; download (23 kb), password: crackmes.de or browse.

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Solution by nordic, published 23. nov, 2001; download (12 kb), password: crackmes.de or browse.

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Solution by nud, published 23. nov, 2001; download (3 kb), password: crackmes.de or browse.

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Solution by sushi, published 23. nov, 2001; download (195 kb), password: crackmes.de or browse.

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Solution by jk!, published 23. nov, 2001; download (17 kb), password: crackmes.de or browse.

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Solution by yar0n7, published 23. nov, 2001; download (29 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

bengaly's gargamel

Download bengalygargamel.zip, 58 kb (password: crackmes.de)
Browse contents of bengalygargamel.zip

break the encryption, and decrypt a give...

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Feb, 2002
Downloads: 3191

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Solutions

Solution by death, published 18. feb, 2002; download (2 kb), password: crackmes.de or browse.

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Solution by phueghy, published 18. feb, 2002; download (75 kb), password: crackmes.de or browse.

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Discussion and comments

Benladan's ARTAN Protector UnpackMe

Download UnpackMe.zip, 1778 kb (password: crackmes.de)
Browse contents of UnpackMe.zip

This is Firest UnpackMe of Artan Protector, Artan is new persian win32 protector/obfuscator

Enabled Options :

1.Anti-Debugger Routines
2.Resource Protection
3.Anti-Dump Routines
4.Import Table Redirection
5.OEP Virtualization (Convert OEP to VM)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 01. Aug, 2013
Downloads: 301

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Benladan's First Iranian Obfuscator Crackme

Download Patch_Me.zip, 326 kb (password: crackmes.de)
Browse contents of Patch_Me.zip

Just try to patch it , no loader and no serial fish.
Thanks.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 16. Apr, 2009
Downloads: 2965

Rating

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Solutions

Solution by Gyver75, published 01. jan, 2010; download (2391 kb), password: crackmes.de or browse.

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Discussion and comments

luckysundog 30. Sep 2009	code execution in stack is not a good way... do you ever hear about DEP ?
Gyver75 18. Nov 2009	This Crackme is very nice! About DEP... well you can launch it in a Virtual Machine and disable the DEP from msconfig! Also a Keygen is required? ( the patch is quite simple, if you understand how to bypass the obfuscation!... only 2 bytes ;))
Benladan Author 19. Nov 2009	Yes , the goal is understanding Obfuscation System , patching is so simple ( with out Obfuscation Methods ). :)
Gyver75 01. Dec 2009	I found a bug in the code; some time, when i enter a correct Serial, the message " You win, i lose " is stretched! Problems with threads? link: http://img40.imagefra.me/img/img40/1/12/1/f_qit69hrm_4e18d2a.jpg
Benladan Author 02. Dec 2009	Thanks for bug report , it's because of some of far jumps.
andrewl.us Moderator 11. Dec 2009	congrats to Gyver75, very cool work here
Gyver75 11. Dec 2009	Thanks andrewl.us!
Benladan Author 15. Dec 2009	Thanks Gyver75 , very nice work.
Gyver75 23. Dec 2009	i update the tutorial ... http://anonym.to/?http://www.accessroot.com/arteam/site/download/Patch_Me.zip.php?view.314
andrewl.us Moderator 23. Dec 2009	Gyver75: please choose "Your submissions"->"Upload new version" so that crackmes.de can have a copy :)
Gyver75 23. Dec 2009	Done! i'm sorry because i uploaded more same solutions; i haven't read the info! sorry again
Benladan Author 23. Dec 2009	@Gyver75: Thank you so much, excellent job :)
Benladan Author 29. Dec 2009	Whats going on ?! Where is tut file ???????
Gyver75 29. Dec 2009	Hi Benladan, the new tut file is too big to post ( 7.2 M), i will try to reduce it!
Benladan Author 30. Dec 2009	Thank you Gyver75 ;)

Benladan's Hard Core Poly Protection

Download HPP.zip, 360 kb (password: crackmes.de)
Browse contents of HPP.zip

Poly Protection is Very nice Thech. against Reverse Eng.

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: Borland Delphi

Published: 15. May, 2009
Downloads: 808

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by exevf, published 10. feb, 2009; download (365 kb), password: crackmes.de or browse.

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lionaneesh
13. Apr 2015

Its too complex for me. Spent like 3 hours on it, trying to reverse. It's calculating some sort of a checksum and reading integers from argv[]. Super weird!

bat.serjo
14. Apr 2015

Bertel, I know it's first of april but this ain't easy bro! It even has a "fake" entry point. Let alone the fat - obfuscated switch-case inside 0x4009f0 using the function pointers in .rodata. And what's with the strrchr ! You obsessed with it? There are more than 3 different "hash" functions? What are you protecting? The code for the restroom of the kingdom!
Btw it's easily bypassable with a one byte patch (most of the time).

Keep up the good work bro! If that's easy in your book I don't wanna see the hard one :)

BieX's #2 KeygenMe or PatchMe

Download BieX#2.zip, 246 kb (password: crackmes.de)
Browse contents of BieX#2.zip

It's been 4 years since my last (failure) keygen here are crackmes.de,
I've spent some time to redo my mistakes and I can finally introduce my second KeygenMe/PatchMe.

If you cannot write a keygen, you could always puzzle your mind with a patch.
patching will in most cases be diffucult unless you understand the whole keygen process.

I hope to see some innovative solutions!

Have fun!

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: Borland Delphi

Published: 23. Dec, 2008
Downloads: 722

Rating

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Solutions

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Discussion and comments

BieX Author 25. May 2009	Anyone still interested in this crackme? I'm doing a new one in assembly and would like to have This cracked first. Remember that you can patch it and write a solution that way!
skynetuniverse 26. May 2009	I will try that!! I'll keep you posted!
BieX Author 02. Jun 2009	. NOTE: You have to disable Themes in Windows XP/Vista in order to see the text properly, this is only a visual bug.
costy 01. May 2010	My first solution to a level 6 crackme.
trueman411 12. Aug 2014	we should use the Point H method

BieX's bx KeygenMe#1

Download bxKeygenMe1.zip, 237 kb (password: crackmes.de)
Browse contents of bxKeygenMe1.zip

Keygen Me =D
..it can be somewhat frustrating if you havent made a memory-reprogramming [writeProcessMemory()] keygen before.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 05. Sep, 2005
Downloads: 1193

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by EsKiMo, published 26. dec, 2005; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

[BiGBOi] 08. Sep 2005	Okay, I haven't even started debugging it at all, but I put in for a username 'hi' and for a password 8 and I got a successful prompt (if +++y+e+s+h++ is correct). I put in some other longer strings and got the unsuccessful message in the password box. Did that solve the crack?
Salazan 08. Sep 2005	Just press key "Validate" twice :)
Salazan 08. Sep 2005	PS: or type any key with blank name field :))
.:hack3r2k:. 18. Sep 2005	hack3r2k/hack3r2k44150022 ; Keygen maybe later if i have time.
D4ph1 24. Oct 2005	The routine that the serial is being checked with the right one is wrong. Just enter a serial with the first n-1 strings same as the name and you've got the message. This is happening cause of the value that the counter takes in the loop. If there weren't this,and some more bugs, this crackme would be very good! ;)

bigbang's Citron

Download Citron.Keygenme-Bigbang.zip, 81 kb (password: crackmes.de)
Browse contents of Citron.Keygenme-Bigbang.zip

Citron is a crypto keygenme.
Have fun!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 19. Aug, 2005
Downloads: 690

Rating

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Solutions

Solution by Kerberos, published 10. feb, 2006; download (87 kb), password: crackmes.de or browse.

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Jim~ 29. May 2008	Interesting that you decided to close the application when it finds "Reflector" process running. Not like it prevents anyone from analyzing it in reflector lol
The So;X 29. May 2008	Thanks man for updating your crackme i was really fucked up by previous one
obnoxious 30. May 2008	@@@@Bikers80@@@@ he's in love with timers. timers timers n yet more timers......................
costy 03. Jun 2008	is selfgenning allowed?
DigitalAcid 03. Jun 2008	Don't you know by now that selfgenning is considered patching :P.
bikers80 Author 09. Jun 2008	Thank you all and a good job Costy, N not forget to vote
costy 09. Jun 2008	Yes bikers80. Did you like the way I removed the nag?? There was another way modifing timers. But I think that my solution works better. Anyway removing a nag in a net application is really simply. If you like contact my by email or msn (costyn1@hotmail.it). I really liked your crackme. It's really interesting.
Mazo 09. Sep 2008	Hi all I'm new here and at this topic =) can someone explain me what "nag" mean?
simonzack Moderator 11. Sep 2008	if you're a newbie u should look at some level1 solutions, then ask people in forums, not here

BILAL's 2nd CrackME Advanced

Download 2nd_Crackme_Advanced.zip, 77 kb (password: crackmes.de)
Browse contents of 2nd_Crackme_Advanced.zip

Well simple Online Activation but hard to get there .. good encryption try it out :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 26. May, 2009
Downloads: 204

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Solutions

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Discussion and comments

The So;X 27. May 2009	what u want to do with u r crack me patch or k-gen u dont written any thing dude
BILAL Author 28. May 2009	what it does it goto the website and check if the user exist if it does it opens ...
SpiderZ 28. May 2009	Hey The So;X, Try to bypass the server check n u can't keygen in server check lolzzz. patch him. just open ur eyes n see what he needed. lolzzz

Solution by noukeys, published 13. jul, 2008; download (182 kb), password: crackmes.de or browse.

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Discussion and comments

Bispoo Author 08. Jul 2008	I myself have removed the nag... don't bother with that. Thanks.
ReWrit 08. Jul 2008	just sloved it, upload a Solution in a sec
br0ken 08. Jul 2008	If serial is -ve then it says invalid even if that is what your proggie has generated. Is this a bug or some kind of a trick?
Bispoo Author 08. Jul 2008	serial -ve its not possible, something went wrong on your side... :) tell me for what name its generating that serial please.
xylitol 08. Jul 2008	i will make a keygen soon
Haykuro 08. Jul 2008	very well done crackme, i just submitted my solution + keygen.
Bispoo Author 08. Jul 2008	Thanks Haykuro!! :) im already improving on it and preparing my 2nd KeygenMe
br0ken 09. Jul 2008	Ahh, my bad. I hadn't patched the anti-debug properly :) Nice cme btw :)
Bispoo Author 10. Jul 2008	Haykuro, your solution to my crackme is wrong, it doesnt generate all valid serials... some names will give invalid serials on your keygen. :) try this one for example: user: Eras3r
Bispoo Author 10. Jul 2008	and i just checked the ReWrit solution and its wrong too... :) just test some names in the keygens provided by these 2 members in my original exe and they will fail sometimes. as before, i give the username: Eras3r as example. test it on my orig. exe with the serial generated by the solutions. it will fail
Haykuro 10. Jul 2008	i've made the fix and resubmitted :)
ximus 10. Jul 2008	an interesting keygenme, i just submitted keygen
hound 10. Jul 2008	Solved. Pretty alright. Like the use of signed numbers and little trick at the end to get around it.
Fukc 10. Apr 2009	Good crackme for beginners like myself. Wrote a keygen in asm but not going to submit it because here are better already with coments. Good work!
ben2938 30. Sep 2010	Author should have warned that these crackme#1 are packed with anti-debug and strings are encrypted too. Thus I think these are not so suitable for noobs. Also crackme#2 and crackme#3 are infected -Trojan Horse and Suspicious.Bredolab- as detected by Symantec. Anyway thanks for contribution.

Bispoo's Bispoo Crackme#2

Download KeygenMe2.zip, 12 kb (password: crackmes.de)
Browse contents of KeygenMe2.zip

Hi All,

Continuing my first Keygenme here is Version 2 already!!! it got a few new tricks
up the sleeve, and like before Everything is allowed, write a small txt how you've done it, if you bother, write a keygen , that's all. Hope u enjoy it!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 09. Jul, 2008
Downloads: 474

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by TiedInBronzeChains, published 15. aug, 2008; download (34 kb), password: crackmes.de or browse.

TiedInBronzeChains has rated this crackme as quite nice.

Solution by E1xis, published 30. jul, 2008; download (169 kb), password: crackmes.de or browse.

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Discussion and comments

xylitol 09. Jul 2008	about says: version 1.0
Bispoo Author 09. Jul 2008	Not Relevant, Focus on the matter :D
simonzack Moderator 09. Jul 2008	solved :) nice crackme, and also nice anti-debugging
Bispoo Author 09. Jul 2008	Congratz simonzack!! send me an message on how did u got it please. :)
simonzack Moderator 10. Jul 2008	message sent :)
Haykuro 10. Jul 2008	w00t.. solved and keygenned.. solution submitted! lots of fun Bispoo, keep it up =]
E1xis 30. Jul 2008	Nice stuff Bispoo.
Xspider 30. Jul 2008	yep and u did a solution thx mate
*DNison** 27. Jul 2009	ok i got a message from anti virus saying a trojan has been detected in this crackme

Bispoo's Keygenme #3

Download KeygenMe3.zip, 290 kb (password: crackmes.de)
Browse contents of KeygenMe3.zip

Hi All,

Here is my KeygenMe 3!!! Hope its improved from the last ones,

Copper Medal : Fish a serial for your name
Silver Medal : Understand the algo
Gold Medal: Code a Keygen

NO PATCHING allowed in the algo.

that's all. Hope u enjoy it!

/////////////////////////////////////////////////

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 08. Sep, 2008
Downloads: 992

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Solutions

Solution by simonzack, published 11. sep, 2008; download (34 kb), password: crackmes.de or browse.

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Solution by arpm, published 11. sep, 2008; download (32 kb), password: crackmes.de or browse.

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Discussion and comments

andrewl.us Moderator 09. Sep 2008	Oh no, I just recognized a chiptune. http://modarchive.org/module.php?46922 I think its time to reduce my internet use.
negcit.K 09. Sep 2008	For looking a while, feeling great. I'll try it
lgtngstk 09. Sep 2008	I like how it plays the module. Is there any chance of the parts of the source having to do with playing the module becoming available? Thank you
Xspider 09. Sep 2008	O_o lol i liked big Algo :D and the skin xD @lgtngstk: try ufmod!!
Bispoo Author 10. Sep 2008	Yeah u sure liked the skin didnt u xspider xD @lgtngstk Like xspider said, look for ufmod.
obnoxious 10. Sep 2008	oooooo another medal contest..... hummmm must try it then......
simonzack Moderator 10. Sep 2008	Yeah u sure liked the skin didnt u xspider xD ROFLMAO :D i'm close to solving it!
lgtngstk 10. Sep 2008	Thanks, that uFMOD looks good. BTW, these algos are cracking me up!
LAS3R 10. Sep 2008	This is not a bug just thing i noticed while i checked about window, i thought u closed the window with about button instead of clickin on about window, so every time you press the about window buttob you get another about window when one is already showing ;) just some useless thing i noticed :P
Bispoo Author 10. Sep 2008	@simonzack What medal are u aiming for? :D
Zaphod 10. Sep 2008	I got a copper medal - that's a beginning...
Bispoo Author 10. Sep 2008	Copper Medal for Joka, He was the first one Fishing a serial... Lets see if someone accomplishes the other ones :D
arpm 10. Sep 2008	did it!!! I got a gold medal submitting...
Bispoo Author 11. Sep 2008	nice, im waiting to see that :D
lgtngstk 11. Sep 2008	My Olly doesn't seem to like this crackme. :(
simonzack Moderator 11. Sep 2008	me too :) submitting solution
simonzack Moderator 11. Sep 2008	ahh damn proxy can't let me submit, i have to go home and do it
lgtngstk 11. Sep 2008	This is definitely harder that level 2. It's got some kind of weird protection scheme.
simonzack Moderator 11. Sep 2008	it's easy what'u talking about??? try some of the level3s, e.g. antiolly, that's what its like
Bispoo Author 11. Sep 2008	Simon, ur sulution is good and all, but didnt u run into the checksum security? that's why some members are having difficulties, u dont explain that in ur solution, :D didnt u stumble upon that?
simonzack Moderator 11. Sep 2008	do u mean the checksum against the two serials? It looked like a serial, i looked into the call, and there was a checksum, mustve been with the two serials, so i didn't really bother explaining it xD
lgtngstk 12. Sep 2008	Well, I would submit my solution for the checksum, but there are already 2 solutions and I still haven't figured out the algo. I'm just too slow and stupid I guess ^_^'
simonzack Moderator 12. Sep 2008	seriously, do some of the level1s first, they'd increase your skill a lot
dalixux 27. Nov 2008	my god ! so luckly! i also did it , however it's too later.

Bitpatcher's MY1ST-Keygenme

Download MY1ST.zip, 40 kb (password: crackmes.de)
Browse contents of MY1ST.zip

Try to understand how the serial is calculated and

- write a keygen

or

- explain the way it does

Greetings from
BITPATCHER

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 31. Jan, 2008
Downloads: 634

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by grooshenka, published 14. feb, 2008; download (270 kb), password: crackmes.de or browse.

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Discussion and comments

maokecheng 04. Feb 2008	hm....the serial must be >=15
Bitpatcher Author 05. Feb 2008	You mean the first part? No, serial >= 15 isn't right. :o)
Bitpatcher Author 05. Feb 2008	Should I give you a tip?
cosmos 06. Feb 2008	Yes Bitpatcher, I'm trying this for sometime.
Bitpatcher Author 06. Feb 2008	I don't want to tell too much, but right serial is like this: XXXXXXXXXXXXXXX-XXXXXXX-XXX Hm, more tipps? To understand the first part you might have a look at GetPixel. The second part is very simple, so you will understand on your own. And what could I tell about third part? Hey, it only has only three numbers... ;o) Greetings, BITPATCHER
Bitpatcher Author 08. Feb 2008	Come on... no idea? I could post a valid serial for my nick, but it would offer all secrets / tricks. Has anyone fished a serial or patched it?
grooshenka 08. Feb 2008	Hello, Bitpatcher. Dude, please, don't ruin it for us revealing all the secrets, give us a little more time %)
Bitpatcher Author 09. Feb 2008	There are not really secrets... :o) OK - no more tipps. Have fun!
Bitpatcher Author 14. Feb 2008	Congratulations, Grooshenka: Very good work!!!!
grooshenka 14. Feb 2008	And thank you, Bitpatcher, for a very nice crackme! It was fun to solve :)

blacksabbath's blacksabbath#2electricfuneral

Download bs2kgenme.zip, 188 kb (password: crackmes.de)
Browse contents of bs2kgenme.zip

Hi. Just a little keygenme - find the right serial/password,
and then go make a keygen. You can patch it for you own,
but it's a bad idea to send a patched file as a solution.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 04. Mar, 2011
Downloads: 313

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Discussion and comments

blacksabbath Author 20. Mar 2011	So, is there someone, who try to reverse this crackme? I think, this isn't a hard crackme, just with using timers in delphi...
Axel.NET 21. Mar 2011	ok pointing out I don't work on non .Net platform I can say u used a commercial packer FSG 2.0 anyway using ollydbg setting sfx u can find OEP --> 00456BC0 / then dump and fix iat using importRec 00456BDE CALL <JMP.&user32.MessageBoxA> / 00456BDE NOP so I patched this tedius nag soon when I have time I'll post you a valid serial
blacksabbath Author 21. Mar 2011	Thanks for taking the time to analysis. Really, I've forget that the FSG is commercial packer, I've wondered that compression level has been more than 50%.

blacksabbath's black sabbath #1 (fst crackme)

Download blacksabbath#1.zip, 21 kb (password: crackmes.de)
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Simple crackme, coded half in delphi, half in asm. I think, it can be cracked faster than i have code it :) For get register, you must make valid license file in crackme's directory. Thx!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 28. Nov, 2010
Downloads: 726

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Discussion and comments

EvOlUtIoN 29. Nov 2010	ehm...maybe i'm in wrong, but i think only one license file can be coded with one name and one content. No more. is it true?
deurus 29. Nov 2010	yeahhh it's true
EvOlUtIoN 30. Nov 2010	it's all hardcoded, both filename and content bytes...
Arkantos 30. Nov 2010	It's not working in xp service pack 3. Is there any problem in my Windows?
phel0 02. Dec 2010	@Arkantos: Same for windows 7 x64
blacksabbath Author 02. Dec 2010	EvOlUtIoN, "i think only one license file can be coded with one name and one content": Yes, the license file bytes are hardcoded. Name isn't hardcoded, but is specify to your hardware. In details, this must check filedatetime of windows directory and generate there the filename based on datetime. I haven't check this on win7, but on XP SP3 it still works. Please, write me the address where it's crushed. Now I see that coding asm in delphi7 isn't a good idea :)
Mayhem 07. Dec 2010	Good solution deurus except, like the author says, the name of the license file varies for example on my PC: "128709425-133660656.lic"
deurus 08. Dec 2010	Yeah! I send a message to andrew for delete it

bLaCk-eye's AiNAMOR

Download AiNAMOR.zip, 53 kb (password: crackmes.de)
Browse contents of AiNAMOR.zip

Another crypto/math crackme for all you interested guys!
Regards,
bLaCk"

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 01. Jun, 2005
Downloads: 1551

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Solutions

Solution by TaGaDaPaF!, published 03. jun, 2005; download (103 kb), password: crackmes.de or browse.

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Discussion and comments

bLaCk-eye Moderator 01. Jun 2005	Ok guys The race has been started: let's see who cracks first this shitty crackme I can give the source on request,although it won't help you too much. Ain't RSA funny ? :O Cheers bLaCk-eye
jB_ 02. Jun 2005	Got it :p Interesting crackme, congratulations.

bLaCk-eye's BUG cRYPTO cRACKME

Download BUG.cRYPTO.kEYGENME.zip, 96 kb (password: crackmes.de)
Browse contents of BUG.cRYPTO.kEYGENME.zip

Semi-hard crypto crackme by myself.
Enjoy and good luck :)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 09. Jul, 2005
Downloads: 1683

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Solutions

Solution by TaGaDaPaF!, published 27. jul, 2005; download (126 kb), password: crackmes.de or browse.

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bLaCk-eye's Crackme1

Download crackme1.zip, 5 kb (password: crackmes.de)
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Very easy with a softice check

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Aug, 2002
Downloads: 3586

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Solutions

Solution by Ben, published 29. sep, 2002; download (15 kb), password: crackmes.de or browse.

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Solution by cronos, published 06. sep, 2002; download (30 kb), password: crackmes.de or browse.

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bLaCk-eye's Crackme No.2

Download keyfile.zip, 34 kb (password: crackmes.de)
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My crackme number 3

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 16. Nov, 2002
Downloads: 3073

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Solutions

Solution by BGRC Forum, published 25. oct, 2004; download (44 kb), password: crackmes.de or browse.

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bLaCk-eye's Crackme v,0.1

Download crackme0.1_black_eye.zip, 6 kb (password: crackmes.de)
Browse contents of crackme0.1_black_eye.zip

Easy

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 24. Sep, 2002
Downloads: 3198

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Solutions

Solution by _pusher_, published 05. oct, 2002; download (4 kb), password: crackmes.de or browse.

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Solution by bRaiN_faKKer, published 03. oct, 2002; download (4 kb), password: crackmes.de or browse.

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bLaCk-eye's cRYPTO-kEYGENME2

Download crypto.keygenme2.black_eye.zip, 40 kb (password: crackmes.de)
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Easy crypto keygenme

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 07. Mar, 2004
Downloads: 3039

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Solutions

Solution by jB, published 17. aug, 2004; download (41 kb), password: crackmes.de or browse.

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bLaCk-eye's cRYPTO kEYGENME 1

Download cryptokeygenme_black_eye.zip, 13 kb (password: crackmes.de)
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A not so easy crypto keygenme

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 31. Dec, 2003
Downloads: 2556

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Solutions

Solution by bLaCk-eye, published 03. aug, 2004; download (28 kb), password: crackmes.de or browse.

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Solution by Amenesia, published 09. jul, 2004; download (58 kb), password: crackmes.de or browse.

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bLaCk-eye's Crypto KeygenMe 3

Download cryptokeygenme3f.bLaCk.eye.zip, 38 kb (password: crackmes.de)
Browse contents of cryptokeygenme3f.bLaCk.eye.zip

Fixed version of my Quick Math Crackme 2 a.k.a Crypto KeygenMe 3.
Sorry and thanks to bF! for showing me the eror

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 27. Sep, 2004
Downloads: 3198

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Solutions

Solution by bRaiN_faKKer, published 28. sep, 2004; download (92 kb), password: crackmes.de or browse.

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bLaCk-eye's iLLUSSiON

Download illussion.zip, 25 kb (password: crackmes.de)
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A short keygenme - patchme. Quite easy i think

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Aug, 2004
Downloads: 2187

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Kerberos, published 05. feb, 2006; download (81 kb), password: crackmes.de or browse.

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Discussion and comments

donjoe145
12. Jul 2005

is the serial supposed to make the box display your name
by following in algorithm because if you patch the "one" byte it displays an encypted name so what i am saying is there is a 1 specific key for your name, it's like reversed you type in your key and it gives you your name? but you need to make a key that makes your name? thats a pretty cool idea, im just about ready to solve ill right a tutorial if i get around 2 it

bLaCk-eye
Moderator
17. Jul 2005

bLaCk-eye's NiGHTMARE

Download nightmare.kgme.zip, 161 kb (password: crackmes.de)
Browse contents of nightmare.kgme.zip

Advanced crypto keygenme for crypto crackers.

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: C/C++

Published: 25. Oct, 2004
Downloads: 2918

Rating

Votes: 5
Crackme is boring.

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Solutions

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Solutions

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Discussion and comments

T.0.R.N.A.D.0. 27. Apr 2009	The crackme title is "Quick Math Crackme 2" ... but the zip is of "Crypto KeygenMe 3" !?!?
andrewl.us Moderator 27. Apr 2009	So? Besides, I think crackme is unsolvable for all names (bug computes 2*p + p + 1 instead of p^2 + p + 1).

bLaCk-eye's SiEGE Toolme

Download SiEGE.CRACKME.zip, 19 kb (password: crackmes.de)
Browse contents of SiEGE.CRACKME.zip

An ida plugin toolme, which you need to keygen :)
More information inside the package ;)

PS: Yes mate, NO CRYPTO INSIDE :)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 10. Jan, 2007
Downloads: 966

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by MR.HAANDI, published 22. sep, 2007; download (508 kb), password: crackmes.de or browse.

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Discussion and comments

bLaCk-eye Moderator 10. Jan 2007	happy new year and happy new challenge :D

Solution by DarkRaider, published 12. sep, 2005; download (70 kb), password: crackmes.de or browse.

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Send a message to Black Ice »

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Discussion and comments

Ox87k 10. Sep 2005	hy black! :D i try it ;)
bLaCk-eye Moderator 10. Sep 2005	Good luck!
deroko 10. Sep 2005	huh there is CP and WritePMem and also those exceptions at Virtual addresses and that tiny-miny seh that sets singlestep till div ebx is really kewl =)
bLaCk-eye Moderator 11. Sep 2005	Well doroko, you are a good crackme solver so i i'm expecting your solution in few days time :) Take care and i hope you all like this crackme
deroko 11. Sep 2005	yah dumped...ouch got OEP but I'll have to fix all those imports... and that NAG shouldn't be removed =) It will remove itself when we dump it =) heh I almost fall on this trick, cought messagebox but wait... there is more and more and more =)))
NoRG 11. Sep 2005	Heh, on exetools I see already unpacked :) Fast work!
bLaCk-eye Moderator 11. Sep 2005	YAh but i want a tutorial.That's why i put it here :) Deroko: keep on going mate!! Waiting for tutorial soon :) Good luck :D
deroko 11. Sep 2005	oki I'll write all I did to find OEP and imports =)
bigboss1988 11. Sep 2005	hi black i tried found OEP 00411D62 FFD0 CALL EAX true or... sorry man i'm noob in unpack i hope to increase unpack crack me :)
deroko 12. Sep 2005	ahh, there is still something missing... OEP is at VirtualAlloc (obfsucated jmps and then goes to 401DEC... I'm still wondering what did I do wrong =) imports are here, but still crashes =( ahh... =))
deroko 12. Sep 2005	ahhh resources... doh... =)
deroko 12. Sep 2005	done... submitting...
kao 12. Sep 2005	solved in less than 2 hours. relaxing exercise.. :)
bLaCk-eye Moderator 12. Sep 2005	Well guys thanks all for trying...hope it was fun and all! :)
bLaCk-eye Moderator 12. Sep 2005	Well guys i changed the rating to 4 as it seems 7 was a little too much, you all are great crackers... Cya in my next unpackme :evil: :) blaCk

Black Ice's Black Ice crackme #1

Download blackice_crackme_1.zip, 5 kb (password: crackmes.de)
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Dissabled button and a Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 14. Feb, 2003
Downloads: 1444

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Solutions

Solution by Melvill, published 16. feb, 2003; download (53 kb), password: crackmes.de or browse.

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blankwall's arm_crack1

Download Arm_crackme.zip, 4 kb (password: crackmes.de)
Browse contents of Arm_crackme.zip

Simple arm crackme to serve as a basic introduction to Arm.

No patching find the valid key.

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 09. Jun, 2014
Downloads: 516

Rating

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Solutions

Solution by mrmacete, published 16. oct, 2014; download (5 kb), password: crackmes.de or browse.

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Solution by LeoC, published 09. sep, 2014; download (403 b), password: crackmes.de or browse.

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Solution by agentzappo, published 14. jul, 2014; download (1 kb), password: crackmes.de or browse.

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Bl@ck's Make Keygen

Download m@ke_key9en.zip, 12 kb (password: crackmes.de)
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Simply make keygen!!!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 31. Jul, 2008
Downloads: 807

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by br0ken, published 03. aug, 2008; download (51 kb), password: crackmes.de or browse.

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Discussion and comments

pidreq 31. Jul 2008	little spoiler: vbastrcmp :P
TiGa 31. Jul 2008	Knowing the serial and making a keygen are 2 different things.
br0ken 31. Jul 2008	What does vbaI4Var do? Also, does anyone know where I can find a good explanation of VB APIs?
pidreq 31. Jul 2008	@TiGa You're absolutely right!
MACH4 31. Jul 2008	There is very little information around on the vba api calls, and no info on msdn. You can understand what most of them do though, once you see a pattern with them... vba14Var turns what ever has been pushed before it, to int 4 Bytes. Ie. vba(I)nt(4)vars
Bl@ck Author 31. Jul 2008	Just make a keygen.It is too hard.Find a serial is not a matter.I h@pe all genious give me solution.
br0ken 31. Jul 2008	I'm no genius, but I have uploaded a solution. Just wait a few days for it to be approved.
Bl@ck Author 31. Jul 2008	@br0ken ur all post give me marvelous knowledge..:)
xylitol 02. Aug 2008	i have full understand algo but i dont know how to code a keygen for that i'm stuck in the keygening part because a have a noob knowledge in programming ><
Bl@ck Author 04. Aug 2008	look the br0ken solution.
xylitol 04. Aug 2008	yep nice solution br0ken thx
Arttomov 06. Aug, 19:23	Arttomov- =xu{ook\|

BLOODY's NEURON CRACKMES

Download NEURON_CRACKMES.zip, 99 kb (password: crackmes.de)
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FIRST (I THINK) ON THE WORLD SECURITY BASED ON ARTIFICAL INTELLIGENCE. TASTE IT :-)

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: C/C++

Published: 09. Sep, 2004
Downloads: 1431

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Solutions

Solution by dr. animadei, published 18. jan, 2005; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

apuromafo 01. Dec 2015	i was desofuscated the code about jump and call, but how is called, today was founded a program with the same structure (start with int, jumpt, and int post)...how is called? BR, Apuromafo

Blood_Diamond's CrackMe-1 by Blood_Diamond

Download CrackMe-1.zip, 77 kb (password: crackmes.de)
Browse contents of CrackMe-1.zip

It's very esay cracme for beginners.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 09. Feb, 2016
Downloads: 2437

Rating

Votes: 6
Crackme is quite bad.

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Solutions

Solution by ViBeS, published 25. aug, 2016; download (774 b), password: crackmes.de or browse.

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Solution by Fereter, published 12. jul, 2016; download (80 kb), password: crackmes.de or browse.

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Solution by fary, published 11. feb, 2016; download (408 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

d3cart 09. Feb, 15:20	hardcoded DEC EAX, EAX :)
fary 09. Feb, 21:12	Very easy its a simple comparation.
jetcode 15. Feb, 17:51	thanck for me ;-)
binaryquark 16. Feb, 22:51	Yeah this one was easy, hard-coded in the rdata section. DEC EAX, EAX
specx 23. Feb, 08:56	it is in the bag
user234796234 23. Feb, 14:38	What OS are you using? Does not run on windows XP....
mollySlick 16. Mar, 23:21	I wanted to patch it to print out the key at "crack me please", but my fu is weak.
SuzukiTech 19. Mar, 02:02	figured it out. :D
mohanseenauth 18. May, 06:39	I'm really new at this, but I replaced a JE with a JMP and I cracked it. I guess there are different routes to cracking, all to achieve the same results.
tejush 18. May, 20:37	Everyone here uses olydbg ?
Haïky 17. Jun, 16:16	what does DEC ?? I only found that DEC takes only one parameters like DEC EAX to decrement this reg. Anyone to explain me ?
Haïky 17. Jun, 16:22	I guess this string doesn't do anything, just a fake random instruction to waste my time
tomkol 18. Jun, 06:03	DEC is decrement. It simply decrements register by 1. It's equal to x = x - 1.
habim84 20. Jun, 21:09	Guys, I have a problem with Ollydbg. I'm quite new at this and I tried to locate the "Crack me, please" string inside Ollydbg. However, Ollydbg doesn't seem to find such string which is strange.
habim84 20. Jun, 21:17	Never mind, I dump the hex and search the ASCII string from there and it worked.
kyronos 25. Jun, 20:08	Very easy but thanks
software07 09. Jul, 11:58	001B1A3C \|. 68 D8171D00 PUSH 0x1D17D8 ; ASCII "DEC EAX, EAX"
A.P.$lasH 27. Jul, 07:43	INFO.TXT ... 3. You can use only a disassembler.

blowfish's blowfish crackme1

Download crackme1_sa.zip, 9 kb (password: crackmes.de)
Browse contents of crackme1_sa.zip

blowfish crackme1

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. Oct, 2003
Downloads: 1965

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Solutions

Solution by Oorja-HalT, published 11. oct, 2003; download (2 kb), password: crackmes.de or browse.

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blowfish's blowfish crackme2

Download crack2_sa.zip, 4 kb (password: crackmes.de)
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blowfish crackme2

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. Oct, 2003
Downloads: 1688

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Solutions

Solution by ByteL0rd, published 11. oct, 2003; download (2 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 11. oct, 2003; download (1 kb), password: crackmes.de or browse.

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blueatirec's Puzzler KGM by Blue

Download Puzzler_KeygenMe_#fixed.zip, 31 kb (password: crackmes.de)
Browse contents of Puzzler_KeygenMe_#fixed.zip

This keygenme is a special one, if uses a very different approach to get the good or bad boys :)

A valid submission is:
Keygen + Source code + Tutorial

Not allowed:
Bruteforce, code ripping or patching

I guess if you do patching without understanding this puzzle you will surely get a crash.

Hope it will be fun for you guys :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 10. Jul, 2013
Downloads: 224

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by bike, published 05. aug, 2013; download (26 kb), password: crackmes.de or browse.

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Discussion and comments

adwi32 14. Jul 2013	i just started analyze it and i have to say, first checking is a fucking inception XD
adwi32 14. Jul 2013	really well done
adwi32 15. Jul 2013	this is so hard to understand due to used high optimization (or obsfucation)...
blueatirec Author 15. Jul 2013	Well, is that true? God! seems I created something good :P
blueatirec Author 15. Jul 2013	"korsader" won!!! He solved this, now waiting to see more people over here with tutos and keygen :)
tamaroth Moderator 18. Jul 2013	This is in fact quite simple, all you need is blackboxing ability and you can figure it out quite fast. There are some nice tricks here and there which I liked, but nothing over too complicated. Solid 3.
CrackMyAss 01. Sep 2013	Thanks！ I just solved it , it is interesting!

BlueOwl's Knapsack decodeme

Download knapsack_decodeme.zip, 28 kb (password: crackmes.de)
Browse contents of knapsack_decodeme.zip

In this crackme, you will need to step into the role as cryptanalist in trying to find the secret connection between the numbers in order to find a way to decode encoded numbers. Sourcecode to the encoder is included.

-- this seems to be the old version, so removed -- elfz

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 24. Aug, 2005
Downloads: 877

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BlueOwl's Knapsack decodeme

Download knapsack_decodeme.zip, 28 kb (password: crackmes.de)
Browse contents of knapsack_decodeme.zip

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 24. Aug, 2005
Downloads: 1440

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by bLaCk-eye, published 13. sep, 2005; download (116 kb), password: crackmes.de or browse.

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Discussion and comments

bLaCk-eye Moderator 28. Aug 2005	This is a valid crackme and working crackme :) bLaCk
bLaCk-eye Moderator 13. Sep 2005	And now is a valid and cracked crackme :). Waiting for more from you blueowl ;)
NoRG 13. Sep 2005	Great, bLaCk-eye! I tried to solve this crackme with different methods, even with genetic algo. Blueowl points me to LLL reduction. I tried apply it with Maple and Mathematica, but somewhere failed. NTL is great library, I will learn them.

BlueOwl's QSP Keygenme 3

Download QSP3.zip, 6 kb (password: crackmes.de)
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A logistical and practical keygenme. The algorithm is not hidden, but you'll need to devise a way to reverse the encoding tree (not by hand).

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 12. Jul, 2005
Downloads: 1123

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Solutions

Solution by DarkRaider, published 19. aug, 2005; download (30 kb), password: crackmes.de or browse.

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Solution by CodeRed, published 09. aug, 2005; download (20 kb), password: crackmes.de or browse.

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Discussion and comments

pxor 13. Jul 2005	I think it's F@k\|\\| hard ;-D
BlueOwl Author 19. Aug 2005	Thanks for the great solutions guys. :)

BlueOwl's Quantity Serial Protection L.2

Download QSPLevel2.zip, 5 kb (password: crackmes.de)
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User/serial protection keygenme. Has no anti-*, but is harder than you might think. ;)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Assembler

Published: 31. Mar, 2005
Downloads: 1665

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Solutions

Solution by joemok, published 15. apr, 2005; download (14 kb), password: crackmes.de or browse.

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Solution by Mattwood9, published 15. apr, 2005; download (12 kb), password: crackmes.de or browse.

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BlueOwl's UPXed

Download upxed.zip, 28 kb (password: crackmes.de)
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This crackme shows some techs for protecting UPX'ed files."

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 30. Apr, 2005
Downloads: 1802

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by _khAttAm_, published 03. aug, 2005; download (40 kb), password: crackmes.de or browse.

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Discussion and comments

Sinclaire 01. May 2005	Uhmm, good for you, you could have submitted a solution instead od typing it in here!, others would like to solve it too, but hey atleast i got it before you :P, and you should also consider understanding the purpose of the site, good for you if you got the password, but publishsing the password is not needed, you can only ASK ABOUT WHAT YOU DO NOT UNDERSTAND ONLY!
BlueOwl Author 01. May 2005	TQN, i deleted your post. Please don't give away the password.
Haykuro 01. May 2005	i tried everything to unpack it.. I used the PEiD generic unpacker. I attatched OllyDbg to it and found the entry point. but no matter what i try it keeps messing up. Can someone help me?
Sinclaire 01. May 2005	Haykuro: If you managed to get the OEP then mostly half the work is done, if it keeps messing up, then this is due to a protection used against dumping it, which works as follows, the code gets overwritten so that when you try to dump from memory you get the wrong data, but in my opinion you must be doing something wrong, try again this time make sure you have correct the EP of the dumped programed and reconstruct the IAT.
_HellDashX_ 01. May 2005	Haykuro: Hi, in my case i need use a script in Olly using the OllyScript plugin for UPX. Made a script with this code and use it: eob Break findop eip, #61# bphws $RESULT, "x" run Break: sto sto bphwc $RESULT ret Using this script Olly found the OEP in 1 or 2 seconds, only needs trace a few steps and you can found the password in ASCII. I hope this help, :)
elfz 03. May 2005	STRIVING FOR PERFECTION: Before submitting your solution, make sure that you have explained how and why the protections work, how to re-implement them, why is upx foolded; not just way of finding OEP and dumping it!!!
_HellDashX_ 03. May 2005	Hi, i explain it in my submited solution in a txt not in the comment, :)
_HellDashX_ 03. May 2005	And, when you have the zip file password you can read the author explain about the protections, if you see, but i explain it, ok? :)
_HellDashX_ 03. May 2005	But, yes, i forgot put the Anti-Dumping protecction explains in my submited solution, :) Sorry, hehehe...my mind lost sometimes...:)
fjlj 04. May 2005	it was a pretty good crackme but fairly simple lol all i did was step over fallow the esp in dump set a hardware on access dword break and clicked run sepped into the jump and then continued to step into untill it gave me the pass in my registers. also i made the program allert the password instead of "Example using UXP!" or whatever it said lol but overall i liked it
SoN 08. May 2005	This one took me about 2 days but I just got it. I'm glad I figured this one out because it was the first packed crackme I've tried. Thanks for writing it.
_pusher_ 08. May 2005	yeah man... its bad that you are not able to publish a tutorial for it.. i even had a Softice solution..
BlueOwl Author 09. May 2005	Thanks for the positive reactions. :)
Sinclaire 09. May 2005	And thanks for the c00l tr0ll that closed this crackme and destroyed all the fun, we should really thank him, cheers up.
Zero Moderator 11. May 2005	The "c00l tr0ll" is the automation in the website system ;)
elfz 12. May 2005	c00l tr0ll punished. he won't count rejected submissions before automatically closing the submissions ever again.
Immortal_One 14. May 2005	This one took me about 2 sec pretty good crackme
snak3 24. May 2005	been trying on this some time now, and finally with some reading i made it :) thx alot for a fun crackme
BlueOwl Author 03. Jul 2005	I hope it gets solved sometime. I think people could learn from its techniques. (about how to re-implement them)
_khAttAm_ 19. Jul 2005	I tried to write a solution and it is accepted, but when I read here, i think my solution is quite lame............. What do you ppl think??
Knight 20. Jul 2005	Before submitting your solution, make sure that you have explained how and why the protections work, how to re-implement them, why is upx foolded; not just way of finding OEP and dumping it!!! Here's what i think^^^. I think that most of us (not talking about complete newbies) can unpack it without bigger problems. But intreseting part is why upx can't unpack it. I unpacked it, but haven't looked at it's sources, so it would be nice to know that. Also if same technique could be used with other packers/protectors it might be realy useful to develope this.
Takayuki 04. Aug 2005	Well this one was a easy one i think. It took some minutes to understand it I liked this crackme :)

blue_devil's CrackMe v1.5 [SCT]

Download sct-cm15.zip, 45 kb (password: crackmes.de)
Browse contents of sct-cm15.zip

This is a simple keygenme. Write a keygen and a tutorial then send it to me as the crackme says ;)
+ it is packed ;)
and
kiss choluk chocuk 4 me ok ;)
blue_devil

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 26. Aug, 2004
Downloads: 997

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Solutions

Solution by xyzero, published 28. aug, 2004; download (11 kb), password: crackmes.de or browse.

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Blue_Orka's BKEYME

Download BkeyMe(Fixed).zip, 11 kb (password: crackmes.de)
Browse contents of BkeyMe(Fixed).zip

The serial generation and checking routine is encrypted.
It has some anti-olly tricks.bypass it and tell me what the trick is.
The serial generation routine makes use of the FPU.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Assembler

Published: 07. Jul, 2005
Downloads: 665

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by merker, published 08. jan, 2006; download (71 kb), password: crackmes.de or browse.

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Discussion and comments

Xacker 02. Aug 2005	hey Blue_Orka, im asking you the same question that ive sent to your email here coz im having problems logging to my email. anyway, my question again is, "because your program has two encrypted parts that are decrypted correctly with 'x' / 'x' while the name length should be 'x' or 'x' or 'x' .. (x is something not a char) do i have to write the keygen for the target without patching anything in it, means, can't i replace some bytes to make things easier to understand then write the keygen?"
Blue_Orka Author 03. Aug 2005	The only thing that can be patched is the anti-olly code. If you want some clues,please mail me giving details of how far you have reached with this crackme.I have just shown the source to forni.I'll tell u its real simple.
Xacker 14. Aug 2005	so.. do i have to wait another month for your reply? :)

blzbb's Crackme 1.0

Download crackme1_blzbb.zip, 9 kb (password: crackmes.de)
Browse contents of crackme1_blzbb.zip

This is my first crackme
Write in Visual Basic

Rule:
-no patch
-find correct name and serial

if you like make a keygen

BlZbB

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 02. Mar, 2007
Downloads: 468

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Solutions

Solution by MACH4, published 12. apr, 2008; download (10 kb), password: crackmes.de or browse.

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Solution by apuromafo, published 12. apr, 2008; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

qwertydid 06. May 2007	You can't make a CrackMe who generates serials based on random numbers, and ask for right serial or keygen... It's just not possible...
zairon Moderator 07. May 2007	qwertydid, in this case why don't you write a tutorial explaining in details the behaviour of the crackme? Why it's not possible to code a keygen? If it's really impossible to keygen the crackme we'll accept this kind of solution for sure.
Toster 07. May 2007	It randomizes by system clock.. if you surf VB files you could find out how is it generated...
apuromafo 12. Apr 2008	i was writen some

blzbb's Keygenme#1.BlZbB

Download Keygenme#1.BlZbB.zip, 1 kb (password: crackmes.de)
Browse contents of Keygenme#1.BlZbB.zip

this is a my first and very simple keygenme
i write in assembly language
so i hope newbie like myself to RE enjoy it ;)

the goal is writing a keygen
serial not unique, it's mean every
user have more than one correct serial

BlZbB

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 23. Jan, 2010
Downloads: 1362

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by Dionosis, published 01. feb, 2010; download (36 kb), password: crackmes.de or browse.

Dionosis has rated this crackme as quite nice.

Solution by DjH2oo7, published 26. jan, 2010; download (30 kb), password: crackmes.de or browse.

DjH2oo7 has rated this crackme as quite nice.

Solution by electrofant, published 26. jan, 2010; download (875 kb), password: crackmes.de or browse.

electrofant has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

fenoloji 24. Jan 2010	Name: fenoloji Serial: 12-D98E-C4DF
Dionosis 24. Jan 2010	Ok for me, I'll write a solution + keygen. Name: Dionosis Serial: :)-898E-34DF
electrofant 24. Jan 2010	Very nice for newbies like me ;) I have submitted solution and keygen
blzbb Author 24. Jan 2010	thanks to work on my keygenme i wait for your solution and keygen
DjH2oo7 25. Jan 2010	After three years I returned to reversing. This keygenme was a good start, thank you. I have sent my solution with keygen.
manivelox 25. Jan 2010	mnvlxxx 12-CB8E-74DF Nice!
Dionosis 25. Jan 2010	Ow, I just figured out a point with some special names. I correct my solution and send it again. :)
DigitalAcid 26. Jan 2010	DigitalAcid DA-FF8E-F5DF
blzbb Author 26. Jan 2010	@Dionosis, @DjH2oo7, @electrofant thanks for your solution. next time i try to make keygenme a little harder.
Dionosis 30. Jan 2010	Hi, I took time this evening to write the new solution I was talking about. It fixes the long names problem : Name: DionosisDionosisDionosisDionosisDionosisDionosisDionosisDionosisDionosisDionosis Serials : SR-AFEE-18DF or CO-41EE-78DF or FJ-C1EE-D8DF ... And it fixes the accentuated names problem : Name: NoëlCéBo Serial: XP-198E-74DF And of course it fixes also the long accentuated names problem. Just look at the new "Going further" section, and the new C source code.
blzbb Author 30. Jan 2010	well i guess no one have more than 80 char name. :)
corte 08. Feb 2010	Nice one! First keygen I've ever successfully created :). Name: corte Serial: 1--F18E-64DF
madmaurice 12. Jul 2010	@Dionosis How can 1 name have several serials? the serial is calculated from the ascii values of the username. sure there are several usernames that have the same serial, but afai can see every username has only one serial.
eltiren 22. Jul 2010	Nice for me. eltiren 00-0C8E-E4DF
ladyskill 25. Nov 2010	oh yeah! you can make many serial from one name: EX: abcdef serial 1: 12-9F8E-34DF serial 2:21-9F8E-34DF .....
pluxi 11. Jun 2012	Phew. I figured out the algorithm in C just now and about to make the keygen. I have to say that this was pretty confusing considering this is my 4th keygenme that I solved. The first algorithm you run across is rather convoluted and confusing and took me maybe 10 minutes to figure out what it was doing. And the way the functions are laid out was a little confusing as well, but the actual hashing algorithm isn't difficult to understand.

boatcjz's boatcjz 's crackme version 2.1

Download CRACK_MEv2.1_BY_美丽の破船.zip, 12 kb (password: crackmes.de)
Browse contents of CRACK_MEv2.1_BY_美丽の破船.zip

very easy!!

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 01. Jul, 2008
Downloads: 158

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Solutions

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Discussion and comments

ReWrit 01. Jul 2008	would be nice if u could translate it to english :)
costy 01. Jul 2008	To author: Please translate it
TiGa 01. Jul 2008	ASM is ASM. You should be able to figure it out whether the GoodBoy says "GoodBoy" or "skjbgsbghsgsbg123.7e/34tedgfd".
DigitalAcid 02. Jul 2008	"skjbgsbghsgsbg123.7e/34tedgfd" could be "Badboy" :P.
TiGa 02. Jul 2008	@DigitalAcid: If you can't see the difference between a BadBoy and a GoodBoy by yourself, there's a big problem somewhere. Who did you copy all your solutions from? :p
obnoxious 02. Jul 2008	oh oh this is getting interesting!!!!!!!!!!! ;)
costy 02. Jul 2008	"skjbgsbghsgsbg123.7e/34tedgfd" could be "you need to type a number" or "serial must have 7 characters"... or another hint. What do you think if i wrote a solution in Italian??
TiGa 02. Jul 2008	A solution is not the same thing as a crackme. ASM is ASM. If the length of the string is compared to a number, you can easily figure out that "skjbgsbghsgsbg123.7e/34tedgfd" means serial not long enough or too long. It's called a logical deduction. Reverse-engineers tend to use that "logic" thing a lot. What about crackmes with no strings at all? Crackmes in other languages have always been accepted but not solutions. If you absolutely need strings to know what is going on, well, switch to another easier crackme. You can complain or see this as a challenge, it depends on you. If you're willing to learn new things.
TiGa 02. Jul 2008	It doesn't really change anything but I increased the difficulty level to reflect the extra challenge of figuring out the Chinese strings. IMHO, the challenge of this crackme resides mostly in the crypto part, not figuring out the chinese strings.
costy 02. Jul 2008	Can I patch it? I don't know if i can becouse i have some difficulties to read the readme.txt
TiGa 02. Jul 2008	You're just trying to be stupid now. You know a keygen is required.
simonzack Moderator 04. Jul 2008	Since the author already provided a valid pair, should be clear patching's not allowed, to view the readme: open with chinese simplified font, go to google, translate to ...
br0ken 09. Jul 2008	Interesting... http://bbs.pediy.com/ -> Chinese ReadMe is in Thai language (http://www.appliedlanguage.com) Google doesn't have Thai in it's list :(
simonzack Moderator 09. Jul 2008	It is Chinese, I'm sure, try to translate it using google, it'll give the right stuff

Boba Fett's Crackme 2

Download bfcrackme20.zip, 12 kb (password: crackmes.de)
Browse contents of bfcrackme20.zip

Name / Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Oct, 2002
Downloads: 1966

Rating

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Solutions

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Boba Fett's Crackme 3

Download bfcrackme30.zip, 35 kb (password: crackmes.de)
Browse contents of bfcrackme30.zip

OCX

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Oct, 2002
Downloads: 1726

Rating

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(we have only 1).

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Solution by Bswap, published 22. jan, 2009; download (13 kb), password: crackmes.de or browse.

Bswap has rated this crackme as nothing special.

Solution by br0ken, published 22. jan, 2009; download (1329 kb), password: crackmes.de or browse.

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Solution by Sashx41, published 22. jan, 2009; download (6 kb), password: crackmes.de or browse.

Sashx41 has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

Sashx41 18. Jan 2009	Very nice job and a very nice trap, I didn't expect it ;) Solution is comming soon...
Ox87k 19. Jan 2009	Well, it's just a 1 byte patch crackme! =)
boon Author 19. Jan 2009	Are you sure? Did you actually try it? As sashx41 said ,doing it the obvious way you will discover my trap.
br0ken 19. Jan 2009	Nice. I've seen this kinda protection in some other cmes too.
br0ken 19. Jan 2009	Sent Video Solution:)
Ox87k 19. Jan 2009	Sorry, "just" -> "like"! I wrong to write!!!!
Ox87k 20. Jan 2009	Even if... i made a 1 byte patch and it works fine. Tested on 3 machine and it works good! Is it possibile? ;)
boon Author 20. Jan 2009	Well apparently it is , I guess you did in some unexpected place. shrugs
Ox87k 22. Jan 2009	Hum.. Why you guys modify in this way the crackme?! I mean for example br0ken (you because your solution is like mine), why you make something like: 0040109B 90 NOP 0040109C 16 PUSH SS (if you click check button many time it pushes SS everytime in the stack and it isn't that good if you haven't a pop) when you can simply do: 0040109B /EB 00 JMP SHORT fixed.0040109D ?? :)
br0ken 22. Jan 2009	@Ox87k Yes, I should have changed both bytes (0xEB and 0x16) to 0x90. But, by that time I realized this, I had already made the video, and didn't want to make another one. And to my surprise, crackme didn't crash. So, I guess the extra stuff on the stack is no harm. But what you're saying is correct. For a fool-proof way, you must change BOTH bytes to 0x90. @Everyone else, if you go through my solution, remember to change the second byte (i.e 0x16) to 0x90 as well. Thank you.

boonz's Keygenme #1 by boonz

Download KeygenMe_1_by_boonz.zip, 79 kb (password: crackmes.de)
Browse contents of KeygenMe_1_by_boonz.zip

Ok, so this is my first cm :)

-Info

1.) It's a Keygenme.
2.) It's not packed, just plain algo for beginners.

-Rules:

1.) No patching.
2.) Write a keygen.
3.) Submit your solution to
a) crackmes.de [or if not possible for whatever reason]
b) dozing.dude@gmail.com

Regards,

boonz

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 30. Jul, 2006
Downloads: 2001

Rating

Votes: 8
Crackme is nothing special.

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Solutions

Solution by Iuss, published 05. aug, 2006; download (57 kb), password: crackmes.de or browse.

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Solution by cobrasniper555, published 05. aug, 2006; download (96 kb), password: crackmes.de or browse.

cobrasniper555 has rated this crackme as awesome.

Solution by cyclops, published 05. aug, 2006; download (15 kb), password: crackmes.de or browse.

cyclops has rated this crackme as boring.

The submission of solutions is closed.

Discussion and comments

red477 01. Aug 2006	A simple keygen from me, but I wonder if this is what the author originally want to see: I mean if the author didnt do that on purpose, they are probably bugs. part 2 of the serial - useless instructions: 0040126E \|. 03C8 ADD ECX,EAX 00401270 \|. 2BD3 SUB EDX,EBX 00401272 \|. 33D0 XOR EDX,EAX part 3 - is this what the author want to move? 00401292 \|. B8 F8E04000 MOV EAX,keygenme.0040E0F8 http://rapidshare.de/files/27795396/kg_KgMe_boonz.rar.html
boonz Author 01. Aug 2006	hi, this is only some -i think it is called- junkcode. thx for your kg!
cobrasniper555 01. Aug 2006	Okay, I found a serial for my name and I am sure I have the right format for coding it in C++, and when I made my keygen, the serial outputed it close to the correct one, but not completely. Could someone maybe give me a hand on this? (If I'm asking for something illegal on this site like this, go ahead and erase it and notify me :D)
boonz Author 01. Aug 2006	if you could state your problem a little more detailled and tell us what part of your serial is incorrect, we might be able to help you.
cobrasniper555 01. Aug 2006	Well, it's rather complicated, but I'm using red477's ASM to correct my C++, because I see a couple parts where I f***ed up on, :P . But thanks for trying to help and thanks for the keygenme, it wouldn've been my first on my own! But then I got stuck, lol. Thanks!
cobrasniper555 01. Aug 2006	Okay, I got my keygen, now...I need a solution.txt if I'm correct(I've only written one keygenme which is still being uploaded and I've never written a solution, so please mind my mistakes :D)
boonz Author 01. Aug 2006	@everyone who solved my keygenme: give it a try a submit a tuto, i'm really excited to see some results & different ways to approach it!
cobrasniper555 01. Aug 2006	I have submitted a solution boonz, waiting to see if it can be put up, it includes a source for C++, a keygen and a tutorial which just took me quite a while to write! So glad, it's my first, lol. Hope everyone enjoys it, or a majority of you! :P
boonz Author 01. Aug 2006	hello folks, NaLe!T sent me a solution via email and it can be found at these locations: a) Badongo, external host http://www.badongo.com/file/1159653 b) on my homey Apache which is up, when machine is up http://boonz.no-ip.info/reversing/crackmes/KeygenMe%201/2oo6NaLe!T_Keygen.rar thx a lot, NaLe!T also a solution by cobrasniper555 is being reviewed by the mods now.
cybie 01. Aug 2006	ok boonz first i wanted to write a keygen and a tutorial but uin the second thought it was like: 'Hey, Boonz already wrote the Keygen!' so the tut would be very short and i decided not to submit a solution and just let u know that this is the way i made a keygen out of your keygenme (i know patching was not allowed but it was not neccessary to find a serial too): 1.) Patch 401321 to a JMP 2.) 00401310 \|. B8 F8DD4000 MOV EAX,KEYGEN.0040DDF8 <-- the complete serial is located at 40DDF8 so u just have to patch at 401338 from a PUSH 0040DC03 to a PUSH 0040DDF8 After these simple patches are made the serial is moved to the textbox instead of the goodboy message Now u just have to enter a name and click check to get a valid serial! Thats all :)
boonz Author 02. Aug 2006	hey cybie, your way may sound a bit lame, but it is 100% correct & effective and since I didn't explicitly forbid self-keygenning your solution is perfectly alright. It does lead to the desired result & in case somebody needed to get this cm done for whatever reason he'd be pretty clever to come up with this. Thanks a lot for this interesting point of view. Nice job, mate thumbsup
_tbU 02. Aug 2006	Hi, here is my Keygen-Algo for this KeygenMe. I'm to lazy to write a Keygen, sorry. The KeygenAlgo is divided in three Parts: 1) strPart1 = strlen * 19h - sum(ASC-Bytes_Editfield_1) (ASC-Bytes_Editfield_1 is the Sum of all Bytes in ASCII-Code in Editfield 1. For Example: If you Input 1234, or 2431, or !!!g, etc., you will get -102 / FFFFFF9Ah) 2) strPart2 = strPart1 * strPart1 * strPart1 3) strPart3 = 41720F48h (If no relocation :-) ) Now you can create the Key: strKey = "Bon-" + strPart1 + "-" + strPart2 + "-" + strPart3
boonz Author 02. Aug 2006	ho, your solution is fine, right but I'd nevertheless like to see a solution + a compiled keygen. Remember, not everyone can sum things up that easily, so the real newbies would probably be thankful for a full-scaled tut!
cobrasniper555 02. Aug 2006	I submitted one like 2 days ago, but it hasn't gotten up yet, the mods are a little slow or something....
zairon Moderator 02. Aug 2006	The crackme is very easy and in this case I prefer to wait some days before approving something. When I have some solutions I'll check them approving only few, the better ones. I can approve all the solutions but it doesn't have much sense to read 5 or 6 identical solutions.
cobrasniper555 02. Aug 2006	Oh, okay, I didn't think of it that way, well, okay, now I understand.
[:.NaLe!T.:] 03. Aug 2006	@Boonz: I've sent you fixed version of keygen. Now it should work in the Firefox too... Have you checked it? Poz
boonz Author 03. Aug 2006	Nah, NaLe!T, I ain' got nothin' yet. Perhaps it's still about to come yet?
jdxyw2004 04. Aug 2006	It is very simple.I have done it.This is my first try.
toshimi 04. Aug 2006	only for XP?. :(
boonz Author 05. Aug 2006	@toshimi I really don't know, I can't test it on other OS, my apologies! @Solvers Good job, everyone, quite interesting solutions :) @zairon nice selection ;)

boonz's Keygenme #2

Download KeyGenMe2.zip, 59 kb (password: crackmes.de)
Browse contents of KeyGenMe2.zip

Ho!

Here's the second one, a little more difficult I hope. OO C++ this time, so be prepared for some cross-referencing and (intented) obfuscation ;)

-Rules:
.You may only patch the "nag" and "<Name>"!
.No self-keygenning!

-Tasks:
.Remove the "nag"!
.Put your name to "<Name>"!
.Remove the Anti-Protection!
.Make a keygen!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: C/C++

Published: 11. Dec, 2006
Downloads: 663

Rating

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Solutions

Solution by Ank83, published 20. dec, 2006; download (392 kb), password: crackmes.de or browse.

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Discussion and comments

boonz Author 20. Dec 2006	excellent work, Ank83! a christmas-candy to whom is able to tell me what the trivial name of the recursive function is...
gibz 21. Dec 2006	Factorial? Though a floating-point version. You also use mathmatical nCr, though I'm not sure if it was intended as such :) Looks like Ank83 beat me, but I wrote a keygen for it as well. I'll write up a longer tut to explain more of the source program in detail, I'll upload it with a C/C++ keygen sometime tomorrow.
gibz 21. Dec 2006	Oh and one bit of silliness - you don't do a minimum-length check on the username, so names of 1-3 characters will have a (working) serial number of "0". Something to keep in mind for future apps :)
boonz Author 21. Dec 2006	yep, you're right gibz, factorial :)

boonz's KeyGenMe #3

Download KeyGenMe3_--_boonz.zip, 22 kb (password: crackmes.de)
Browse contents of KeyGenMe3_--_boonz.zip

Hi!

Here's the third one, some maths this time. Can you remember how to solve
higher grade equations? ;)

-Rules:
.No patching!
.No self-keygenning!
.If you suck at math you may bruteforce ;)

-Hints:
.You should not be afraid of small or big numbers!

-Tasks:
.Find all possible, "straight-forward" serials!
(.Make a keygen:)
.If you want to float downriver (big hint here!) use the little weakness to find
infinitely many serials!
.Have fun...

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 08. Mar, 2007
Downloads: 594

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by totouan, published 23. mar, 2007; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

cobrasniper555 15. Mar 2007	Hey Boonz! I'll give it a good shot! Haven't talked to you in a while anyhow!
boonz Author 23. Mar 2007	Outstanding solution, nice work!
totouan 24. Mar 2007	thanks boonz... btw nice to solve crackme related equation :)
KoЯn Rulz 20. Dec 2007	i'd write a solution but i hate to type so much just hack

BootLoader's Bobong CrackMe

Download Bobong_CrackMe.zip, 7 kb (password: crackmes.de)
Browse contents of Bobong_CrackMe.zip

- For me this is very easy, but i want admin decide for what difficulties for this. :)
- Just Make a Keygenerator For This. No Patching!
- Not Protected, but use some encrypting things. :)
- Try it! :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 01. Dec, 2005
Downloads: 1165

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by guest`, published 12. mar, 2006; download (1 kb), password: crackmes.de or browse.

guest` has rated this crackme as boring.

Solution by HMX0101, published 26. dec, 2005; download (158 kb), password: crackmes.de or browse.

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Solution by anorganix, published 07. dec, 2005; download (156 kb), password: crackmes.de or browse.

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Discussion and comments

Tenshi 01. Dec 2005	a keygen...i think its not an generated serial
Tenshi 01. Dec 2005	o.O....for me it was easy....but i said the serial is not generated.... just try this = FE86CEC1...tata DONE ;-)
Tenshi 01. Dec 2005	ahhh i have tested on my other pc....wrong..... mhhhh i will take an look deeper into it...
HMX0101 01. Dec 2005	on my computer, says "Wrong", i'm building a keygen for this crackme
BootLoader Author 02. Dec 2005	hehe. thanks for trying.
modchip 02. Dec 2005	Hmmmm... pinoy ka ba bootloader??? If you can understand this... then your answer is yes...
BootLoader Author 02. Dec 2005	modchip, Yes, pinoy ako, pinoy tayo! :)
modchip 02. Dec 2005	Ayus!!! 3 na ata tayong pinoy dito!!! pre, try mo naman yung two crackmes ko... :) i just downloaded yours.. pag may time na ko saka ko i-de-"debug"... :)
jB_ 06. Dec 2005	Easy stuff for real beginners, as you say :) You say there is encryption? Where? Reversing a string is not encryption!...
BootLoader Author 07. Dec 2005	jB Try explore inside and you will see it. :)
modchip 09. Dec 2005	Galit na si jB sayu... heheh...
HMX0101 25. Dec 2005	my serial have seventh chars, solution submitted

BootLoader's CrackMePls

Download CrackMePls.zip, 7 kb (password: crackmes.de)
Browse contents of CrackMePls.zip

- not protected but use simple anti-debugging thing and old school encryption.
- Just patch it to remove the nag and to accept the fake password.
- Find the real Password.

- Very easy right, :) hope you solve it. Enjoy cracking.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 26. Dec, 2005
Downloads: 1058

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by konstAnt, published 01. jan, 2006; download (21 kb), password: crackmes.de or browse.

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Solution by microplant[mp], published 01. jan, 2006; download (10 kb), password: crackmes.de or browse.

microplant[mp] has rated this crackme as quite nice.

Solution by EsKiMo, published 01. jan, 2006; download (8 kb), password: crackmes.de or browse.

EsKiMo has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

microplant[mp] 26. Dec 2005	Hmmm....curious. Patch 2 every serial = no problem Find real serial = no problem Patch nag = big problem Oo I cant just NOP out the call for rtcmsgbox - dunno why. If I do that, the program wonÂ´t start. Anyone already patched the nag ?
microplant[mp] 26. Dec 2005	OMG IÂ´m so dumb :D about two coffees later I found why it didnÂ´t work before - n1. solution in work !
modchip 27. Dec 2005	Whoe! BootLoader, humahagibis ka ah... :) Keep it up man.
spadeko 27. Dec 2005	I'm a NEWBIE, but when I load it into OllyDBG, What code does I then have to look at if I want to find the code? Does I have to look at ALL the code?
modchip 28. Dec 2005	You don't have to read all the code. Put a breakpoint where you think the check is is made... :)
spadeko 28. Dec 2005	modchip: Oki, I will follow some Tutorials..
modchip 28. Dec 2005	Nice... :) Have fun!
BootLoader Author 28. Dec 2005	happy new year to all!!! hope you solve it. :)
konstAnt 28. Dec 2005	Yah happy new Year to u too
wildcard 29. Dec 2005	pwede tagalog dito?
modchip 30. Dec 2005	Wow, dami palang noypi dito! Manigong Bagong Taon sa inyong lahat! (Happy New Year to all of you!)
BootLoader Author 30. Dec 2005	hehe. pwedeng pwede wildcard.

BootLoader's Now KeygenMe

Download Now_KeyGenMe.zip, 6 kb (password: crackmes.de)
Browse contents of Now_KeyGenMe.zip

-this one is my second crackme, a little bit harder than the first.
-written in my favorite langauge VB.
-Still Not Protected, but a liitle old school encryption :)
-No Patching! just find the password and make a gerator for the password. i little bit explaination how do you solve it. :)
-So... try it dude. :) have a nice day. enjoy!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 13. Jan, 2006
Downloads: 1208

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by EsKiMo, published 13. feb, 2006; download (32 kb), password: crackmes.de or browse.

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Discussion and comments

Tenshi 09. Dec 2005	Runtime Error '76': Path not found. i think there is somthing wrong or is this part of the keygenme ^^???
zairon Moderator 09. Dec 2005	I didn't notice the problem on xp sp1 and 2. Btw, is the problem related with particular serials (i.e. only chars) ?
Tenshi 09. Dec 2005	i dont even see ur form.... if i trace the keygenme he wants to open msvb32.dll may be u had compiled it in debug mode so u must have an installed vb to run them....i even cant find the dll in inet buts in an vb dll which the name shows
Game-Over 09. Dec 2005	I have the same problem on xp sp2. When I try to trace the error I found that it tries to open this file "C:\WINDOWS\Desktop\crackme\Project1.vbp". But if this is the case then how zairon was able to open it?
BootLoader Author 10. Dec 2005	sorry for you encountered problems. but i seem it works even you dont have a vb installed on your computer.
modchip 10. Dec 2005	Hey bootloader, i get runtime error 76... path not found... im running windows 2000 sp4... pero yung sa isang pc xp, ok naman... paki check naman pre... :)
BootLoader Author 10. Dec 2005	because crackme is looking for a system directory called "c:\windows", so if your system directory not equal to that directory it's cause for an erro path not found. and im sorry for that error. :)
modchip 10. Dec 2005	ok pre, salamats... dun nlang ko sa xp ko debug. anyway, you already have 2 crackmes.. hehehhe.
BootLoader Author 12. Dec 2005	i'm waiting for your solution. :p
l0calh0st 09. Feb 2006	Just got the password......Self keygen is allowed or not :)
l0calh0st 09. Feb 2006	Strange the serial is accepte once then it says wrong on again entering...
EsKiMo 10. Feb 2006	The serial changes everytime the crackme is loaded :)
HMX0101 11. Feb 2006	maybe its the randomize call
BootLoader Author 13. Feb 2006	Hehe, So.. all you have to do is make a keygen. :)
ScR1pT_ 10. Apr 2006	I was 600, who download this CrackMe =)
ScR1pT_ 10. Apr 2006	I launch this .exe-file and see error dialog window > +----------------------------+ \| PROJECT 1 \| \|-----------------------------\| \| Run-time Error '76' \| \| Path not found \| +----------------------------+ What is it? Is bug? Please tell me (send me message)
costy 15. Jul 2008	@ScR1pT_ I think it could work if you create a directory called "c:\windows"

BoR0's BoR0's riddle-me (crackme)

Download crackme5.zip, 3 kb (password: crackmes.de)
Browse contents of crackme5.zip

Contains few modified algos, requires a bit of luck and a bit intelligence, too! :) Check out readme.txt for more information. Good luck to all and open your eyes!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 29. Aug, 2005
Downloads: 847

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by ViruX, published 29. aug, 2005; download (16 kb), password: crackmes.de or browse.

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Solution by DarkRaider, published 29. aug, 2005; download (16 kb), password: crackmes.de or browse.

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Solution by thorpe, published 29. aug, 2005; download (3 kb), password: crackmes.de or browse.

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BoR0's crackme1

Download bor01.zip, 4 kb (password: crackmes.de)
Browse contents of bor01.zip

Try to unpack and patch this target

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Oct, 2003
Downloads: 1746

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Solutions

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Solutions

Solution by LuCiFeR, published 31. aug, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by bLaCk-eye, published 29. aug, 2004; download (10 kb), password: crackmes.de or browse.

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Solution by _pusher_, published 29. aug, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by CrackerSixx, published 29. aug, 2004; download (25 kb), password: crackmes.de or browse.

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Discussion and comments

borismilner's 4N006135

Download forn00bies.zip, 399 kb (password: crackmes.de)
Browse contents of forn00bies.zip

4 levels (different executable for each) for total beginners.
All 4 are at an introductory level - starting from trivial and going a little further.

It is intended to be simple and clear enough for a total beginner to feel comfortable with it.

Levels 0,1,2 have their debug symbols left in.
Level 3 has no debug symbols, just to get a feel of it.

Enjoy and please let me know what you think of it.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 26. Oct, 2015
Downloads: 1286

Rating

Votes: 3
Crackme is good.

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Solutions

Solution by aldeid, published 10. dec, 2015; download (331 kb), password: crackmes.de or browse.

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Solution by necessary, published 10. dec, 2015; download (775 b), password: crackmes.de or browse.

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Discussion and comments

seVeb 09. Nov 2015	I was able to complete it until level 2 so far, thanks for creating this interesting crackme series.
necessary 10. Nov 2015	could someone tell me the solution for level 3 pls? 0-2 is easy but i dont understand the algorithm of level 3
truthhk 14. Nov 2015	i show the key as follow 2415921913 2415921983 2415922015 2415922031 2415922039 ...... 2415922687
Banthar 17. Nov 2015	Level 3 took me quite some time, but i totally loved it. Never seen that kind of Flag usage before!
sidak 18. Nov 2015	Man it was too easy,level 0-2 were same and in level 3 we just needed to call its previous expression instead of pushing it. Nice code though,thanks,this was my first cracking try.
aldeid 24. Nov 2015	Detailed solution for level 3 posted here: https://www.aldeid.com/wiki/Solution-borismilner-4N006135-level3
Fr0Zn 30. Nov 2015	Python 3 Keygen - http://pastebin.com/7LWHVCfw
sadfud 19. Dec 2015	all patched here https://reversecodes.wordpress.com/2015/12/19/4n006135-crackme-ensamblador-4-niveles/
GyroJosh 16. Jan, 17:24	Loved it, thank you!
krystlgamer 30. Mar, 16:51	Cool crackmes but they're so easy to patch. Keep it up, though!
PretOriaN 08. May, 00:49	leVEL 1 , one posible pass is user=5 pass=53 without modifiquer code
ralf1985 27. May, 17:06	level 3 took me some time but solved peacefully :P 2684356369
luxdav 30. Aug, 14:43	Solution of Level 1 and 2: https://github.com/LuxXx/reverse-engineering/tree/master/borismilner
_spartax_ 16. Oct, 10:44	Level 2: http://pastebin.com/VNEVGave

borismilner's 4N006135 - Level 4

Download level-4.zip, 21 kb (password: crackmes.de)
Browse contents of level-4.zip

Following my previous submission of levels 0,1,2,3 here comes level number 4.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 26. Oct, 2015
Downloads: 369

Rating

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Solutions

Solution by aldeid, published 10. dec, 2015; download (156 kb), password: crackmes.de or browse.

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Solution by acruel, published 10. dec, 2015; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

briesanji 31. Oct 2015	I m a newbie.. And the first 4 .exe were very easy.. This seems to be easy but I need to figure out where the NOT A GOOD JOB string is because this time it is not clear.. I feel so stupid XD
briesanji 31. Oct 2015	Ok I did it.. ahahah I m so happy
truthhk 14. Nov 2015	hi borismilner,is this level-4,only need change the jno to jo?,the carckme some code is dynamic encryption,but the key algorithm,only at the begin of the code use the password we input ,check the password is not Mario ,other where never use the password ,only use the 409000 to calulate the key and at last add 1000000,check if overflow or not
acruel 15. Nov 2015	You dont need patching.
ranbe3 24. Nov 2015	i can't figure out if there is a manipulation on the password, it seems like not.. patching this is very , but im not sure this is the mission any tips ?
Unvarying 24. Nov 2015	Lol it checks to make sure your name isn't "Mario". Almost done, I just need to finish up the part that executes if your name isn't Mario. I saw some of it, and as I was stepping through, I noticed that the instructions were changing other instructions :o
batman10 26. Nov 2015	This may be a bug in the crackme? why the number to verify the password is taken from the stack, but not from our the entered password. It turns out that the value is always the same, and does not pass the test. sorry for bad english.
aldeid 30. Nov 2015	Detailed solution posted here: https://www.aldeid.com/wiki/Solution-borismilner-4N006135-level4. Thanks you @acruel for your help.
codemaa 15. Dec 2015	took me a few hours but I finally did it :)

borismilner's 4N006135 - Level 5

Download level-5.zip, 22 kb (password: crackmes.de)
Browse contents of level-5.zip

This one is a direct successor for my previous 2 submissions

http://crackmes.de/users/borismilner/4n006135/
and
http://crackmes.de/users/borismilner/4n006135_level_4/

Enjoy and please let me know what do you think of it :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 28. Oct, 2015
Downloads: 482

Rating

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Solutions

Solution by acruel, published 10. dec, 2015; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

acruel 31. Oct 2015	The instruction at 0x00408421 write to an unexpected location of the memory when the value of edx is negative. Is this a bug?
acruel 01. Nov 2015	Another serious bug. The strncpy at 0x004083C9 doesn't null terminate the copied string. You need some luck to success.
truthhk 15. Nov 2015	hi acruel ,i dont think this is a bug ,few days ago ,i upload the keygen code already
truthhk 16. Nov 2015	i write the keygen code by c already
truthhk 16. Nov 2015	why there is no display
sidak 18. Nov 2015	It was to easy,there are no bugs,u can just skip 2nd pass and get to good work.Just assemble the sorry part to get directly to good work,and u r done.If u need tutorial then u can msg me :D
RAR1991 04. Dec 2015	what we need is a keygen not a patch
truthhk 13. Dec 2015	i m sorry ,i only upload the keygencode ,my solution is injected ,i will write the sulotion later
sadfud 07. Jan, 20:17	spanish solution here https://reversecodes.wordpress.com/2015/12/19/4n006135-crackme-ensamblador-4-niveles/

born2c0de's keygenme1_b2c

Download keygenme1_b2c.zip, 23 kb (password: crackmes.de)
Browse contents of keygenme1_b2c.zip

Create a Keygen for this Program.
Patching Not Allowed.
The algorithm is really really simple but the hard part is to understand the code since it is in 16 bit ASM (and may be packed).

Difficulty: 4 - Needs special knowledge
Platform: DOS
Language: Unspecified/other

Published: 06. Jun, 2008
Downloads: 435

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Solutions

Solution by asterix, published 05. oct, 2009; download (166 kb), password: crackmes.de or browse.

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Discussion and comments

born2c0de Author 01. Jun 2008	The keygen algorithm requires at least 3 characters and not 2. I've made a mistake by checking for min. 2 characters and that's why you'll get an error for testing it with 2 characters. All the Best. [ b 2 c ]
born2c0de Author 06. Jun 2008	I've uploaded a new version that corrects the errors. You won't get any errors with this one. All the Best.

BoRoV's Funny KeyGenMe

Download funny_keygenme.zip, 2 kb (password: crackmes.de)
Browse contents of funny_keygenme.zip

It funny simple keygenme.

Make to demonstrate and teach the work of the processor.

Solution only keygen. One name have many serials.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 15. Jun, 2010
Downloads: 548

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by quangredlight, published 15. jun, 2010; download (17 kb), password: crackmes.de or browse.

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Solution by _ghandi_, published 18. jun, 2010; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

BoRoV Author 15. Jun 2010	@_ghandi_: u already make multi serial keygen, that property as required, change the solution :)
redoC 15. Jun 2010	man, that was hard work ;)
kilobyte.asm 15. Jun 2010	redoC really? :P
BoRoV Author 15. Jun 2010	@redoC: it is not as difficult as it seems. ;)
_ghandi_ 17. Jun 2010	I've reupped my solution which addresses the multi serial requirement. Once again, thanks BoRoV, it was fun :D
quangredlight 17. Jun 2010	@_ghandi_: I think there's a bug in your keygen. You perform the following steps: Step 1: name= a, and click Gen, check it with Funny KeyGenMe --> good Step 2: name= abc, and click Gen, check it with Funny KeyGenMe --> good Step 3: name= a, and click Gen, check it with Funny KeyGenMe --> wrong You should use ZeroMemoru Function
_ghandi_ 17. Jun 2010	@quangredlight: You were correct, i wasn't zeroing the naem buffer, it's corrected now and reuploaded. Something i normally do but overlooked this time, oops. Thanks for the heads up. HR, Ghandi
technologycrazy 18. Jun 2010	I got a question (what program do you use to make a keygen generates) i know how to crack something but not make a keygen maker.exe
Flatline 19. Jun 2010	To make a keygen you have to study how to program validates a serial then code a small program yourself that will produce valid serials based on the criteria found from examining the program. There is no quick fix unfortunately.
_ghandi_ 21. Jun 2010	'There is no quick fix unfortunately.' Dang... I was hoping there was one... :(
N1ghtm4r3 18. Mar 2011	Thanks for this funny challenge, my keygen: http://www.multiupload.com/F1ZTAMJE1R

boylizard's Crackme 1 - hardcode serial - VB .NET

Download boylizard.crackme.1.hardcoded.serial.vb.net.zip, 5 kb (password: crackmes.de)
Browse contents of boylizard.crackme.1.hardcoded.serial.vb.net.zip

Hardcoded vb .net serial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: (Visual) Basic

Published: 17. Sep, 2003
Downloads: 1609

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Solutions

Solution by jules, published 25. oct, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by fnuk, published 15. oct, 2003; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

boylizard's Protect Me

Download boylizards.protect_me.zip, 5 kb (password: crackmes.de)
Browse contents of boylizards.protect_me.zip

Something reverse :D

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Oct, 2003
Downloads: 1714

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Solutions

Solution by Plasmator, published 31. aug, 2004; download (19 kb), password: crackmes.de or browse.

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Discussion and comments

bpx_'s BustMe#3

Download bm3.zip, 19 kb (password: crackmes.de)
Browse contents of bm3.zip

Unpack it and find a valid registration.
No keygen is required.

Difficulty: 5 - Professional problem to solve
Platform: Windows 2000/XP only
Language: C/C++

Published: 28. Aug, 2006
Downloads: 581

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by deroko, published 30. aug, 2006; download (36 kb), password: crackmes.de or browse.

deroko has rated this crackme as quite nice.

Discussion and comments

deroko 28. Aug 2006	unpacked 'n' fixed... is it required to find serial?
Shism 28. Aug 2006	find a valid registration
TFB 29. Aug 2006	Haven't unpacked it yet, just took a quick look. Pretty cool how it uses exceptions. I'll check it out later, if I have time.
deroko 29. Aug 2006	got it unpacked and and got one good key =)
hardcoder 30. Aug 2006	@deroko, solution ?
bpx_ Author 30. Aug 2006	Heh, one kitten saved today ;) Have fun with those exams deroko =)

bpx_'s BustMe 1

Download bustme.zip, 26 kb (password: crackmes.de)
Browse contents of bustme.zip

Packed with Invius v1.0a.
Unpacking this should be a challenge.

Find a serial for your name.
A keygen would be nice, but is not required.

This crackme will only run on Win2k or newer.

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: C/C++

Published: 14. Jun, 2006
Downloads: 955

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Solutions

Solution by haggar, published 27. aug, 2006; download (12 kb), password: crackmes.de or browse.

haggar has rated this crackme as quite nice.

Solution by deroko, published 20. jun, 2006; download (29 kb), password: crackmes.de or browse.

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Discussion and comments

deroko 15. Jun 2006	nice unpackme =)
Ox87k 15. Jun 2006	do u solved it deroko?
deroko 15. Jun 2006	only unpacked it, no valid serial yet:P
haggar 15. Jun 2006	Yep, good one. To bad I don't have time, thse double process unpackmes are difficult for OllyDbg. What I sow, problem are only imports which first process gives trough SetThreadContext. Am I right?
Ox87k 15. Jun 2006	my olly seems to be freezed when i put a bp (memory and hw) :(
deroko 15. Jun 2006	haggar: yep you are right :)
haggar 16. Jun 2006	Ox87k , in mine crackme "keyme1" is used same trick :) Chack solution there, but that is only minor annoyance.

bpx_'s BustMe #2

Download bm2.zip, 36 kb (password: crackmes.de)
Browse contents of bm2.zip

Easy Custom pack.
Keygen/Unpack this badboy.

Runs on Windows 98+

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 26. Jul, 2006
Downloads: 546

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

crp- 26. Jul 2006	why is it level 6? keygen is very easy and unpacking isnt needed for analysis at all
EvOlUtIoN 26. Jul 2006	also unpacking is not very difficult, all imports are ok, the only thing i don't understand is what there is before 4012a6, olly tracing feature is not very good in this case so i still don't know the OEP
bpx_ Author 26. Jul 2006	My bad, maybe level 6 was a bit much then. Still, tutorial must include unpacking.
zairon Moderator 27. Jul 2006	My fault, I didn't change the level when I checked it, sorry... Now it's setted to 3 and it should be ok. Let me know.
TFB 27. Aug 2006	Nice unpackme. The only interesting part was when he wiped the PE Header, and I had to rebuild it by hand. Aside from that, nothing special. But still, I like it :) No time to write a tutorial :(
Shism 27. Aug 2006	You rebuilt the pe header by hand lol??? rofl

bpx_'s Bustme #4

Download bm4.zip, 13 kb (password: crackmes.de)
Browse contents of bm4.zip

Unpack it and find a serial.
To find a serial, you may have to think like a hacker =)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Assembler

Published: 04. Dec, 2006
Downloads: 631

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Solutions

Solution by deroko, published 06. jan, 2007; download (9 kb), password: crackmes.de or browse.

deroko has rated this crackme as quite nice.

Discussion and comments

hardcoder 04. Dec 2006	Nice to see you again, It is good to check CC on TLS callback, I successfully Separeted child from parent but obfucation of code in child gets me to the hell... I don't know what to do next, waiting for someone to write a good tutorial.... @ deroko , common you gonna do it :-)
bpx_ Author 04. Dec 2006	ahh, school has been keeping me busy =) Good luck with this one guys!
Savage 05. Dec 2006	strange, i have never seen something like this before... 8)
haggar 05. Dec 2006	How? Trick that he uses at the start is same as ExeCryptor use ;) It is very simple to remove TLS trick, also exception trick. Crackme doesn't have checksums so you can patch some stuf. Obfuscation is rather easy to remove.
kao 05. Dec 2006	Pretty nice collection of tricks. For newbie this will be quite a challenge, for an experienced guy - toy for a coffee break.. :)
red477 13. Dec 2006	Really a nice crackme. I managed to find a serial.(the hint "To find a serial, you may have to think like a hacker =)" is very useful!!) However, I have not been learning unpacking so can some one give some hints to remove the junkcodes? I mean something like this: pushfd xor eax,ecx xor eax,ecx popfd There are so many, so what should do for analysis' convenience? Do i have to patch them to nops?
deroko 05. Jan 2007	hehe nice, didn't know that this one is up :) not that hard imho :) will write solution.

bpx_'s FlashMe

Download FlashMe.zip, 13 kb (password: crackmes.de)
Browse contents of FlashMe.zip

An adobe flash based crackme.
Keygen it!

Difficulty: 4 - Needs special knowledge
Platform: Multiplatform
Language: Unspecified/other

Published: 28. Mar, 2007
Downloads: 582

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Solutions

Solution by cyclops, published 23. may, 2009; download (294 kb), password: crackmes.de or browse.

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Discussion and comments

macabre 29. Mar 2007	The readme suggest you may need version 9 but according to the file command I shows version 7 and it seems to work fine in linux (which is 7) Just an FYI. file result: FlashMe.swf: Macromedia Flash data (compressed), version 7
bpx_ Author 29. Mar 2007	Yeah, I compiled it in flash 7. I was simply recommending the latest version, but 7+ will be all good.
Jim~ 29. Mar 2007	So far, I've been able to phish a serial using Flash 8, but decompiling and interpreting it is a bitch. Looks like Amayeta SWF Encrypt-ed ActionScript. Yuck! :(
CESAR RENZO 24. May 2009	Great Solution Mr. Cyclops. Yeah. It's a very Interesting Crackme Specially For Me. =D. Now I'm Still Learning More About SWF Encryption. As a Curious Note I didn't Found This Source =D Until Now.(Flash Deobfuscator - Real Swf Reader) In fact. I Decompiled The CrackMe With Another Tool ^^; anyway Thanks 4 the Tutorial. I Would Be a Very Great Help 4 All SWF Reversers Like Me. Best Regards. Keep It On. I Will Mailin' you In this Days. ***~ Always Learning, Always Walking, Always Sharing ~***

br0ken's CrackMe#1

Download CrackMe1.zip, 5 kb (password: crackmes.de)
Browse contents of CrackMe1.zip

This is my first CM. So, be nice. Hehe ;)

To Do & Rules : Stage 1 - Find Pass - No Patching.

Stage 2 - Keygen - No Patching.

Stage 3 - Patch it.

Additional : Report any bug[s] you may come across.

You may find one or two ;)

Complier : Dev-C++

Difficulty : Level 1

See ReadMe for more details.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 12. Oct, 2007
Downloads: 2082

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by TiGa, published 22. oct, 2007; download (4500 kb), password: crackmes.de or browse.

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Solution by chaise, published 19. oct, 2007; download (145 kb), password: crackmes.de or browse.

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Solution by _raven, published 19. oct, 2007; download (7 kb), password: crackmes.de or browse.

_raven has rated this crackme as nothing special.

Solution by sd333221, published 19. oct, 2007; download (378 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

sd333221 12. Oct 2007	I am going to submit a solution
XzzX 12. Oct 2007	Nice and very easy crackme. You should include some anti-tampering check because stage 3 is really simple.
_raven 14. Oct 2007	Yeahhh... I've done it! Solution is on it's way!
br0ken Author 14. Oct 2007	Has anybody found the bug I talked about? It's real easy to find.
DigitalAcid 14. Oct 2007	Is a crashing Olly a bug ? =) Another Olly edition said the code section was empty...
br0ken Author 14. Oct 2007	There's no crash, within and outside Olly. I've tested it with the "standard" and the patched Olly on XP SP2. Which edition of Olly are you using? This isn't the bug I had in mind. Look harder ;)
sd333221 14. Oct 2007	I have also submited solution long ago, but it takes years :-)
br0ken Author 14. Oct 2007	It's an easy CM. Perhaps the mods are waiting, to give others a chance to try. Oh well, just wait a little longer. Finding the bug is an additional task. It's not necessary to do it. Anyway, here's a hint if you want to try, Once you've understood the serial generating routine, it's very easy to spot the bug. In fact, it was intentional ;)
br0ken Author 14. Oct 2007	@ XzzX, Thank you for your comments. I'll keep it in mind.
TiGa 14. Oct 2007	We're waiting a few days to leave a chance to more people to send in their solution since it is a very easy crackme. It has never been a speed contest and often, the first solution received is 2-3 lines long or lacks quality. Patch 00401073 to nop. Patch 0040404K to nop. Get Message Congratz. It doesn't explain anything, especially bad if the author says NO PATCHING in big capital letters.
DigitalAcid 16. Oct 2007	Normally i'm using SLV/ICU mod (the crashing Olly in this case) with plugins. I tried FOFF Olly and it works then. But, my pc is a mess and i'm on XP SP1.
chaise 17. Oct 2007	I think that i have found the bug There is a cycle of too in the loop which calculation the serial
noukeys 17. Oct 2007	I solved yet, there is no bug in the crackme. Tomorrow i'm going to write a tuto and send my solution. sorry for my english.
sd333221 19. Oct 2007	Nice, all three did almost the same :-)
br0ken Author 20. Oct 2007	Congratulations to those who solved and to those who tried ;) A full report has been published on my blog site.
sd333221 20. Oct 2007	I am stupid that I didn't understand what you wanted to say with "bug" :-)
sd333221 20. Oct 2007	Maybe you should have called it security issues, then I would have found it earlier :-D
TiGa 22. Oct 2007	I made a video solution and a "making of" video of the keygen. The forum has a new video website: http://video.reverse-engineering.net
br0ken Author 22. Oct 2007	Nice video, I enjoyed watching it ;)
mourya 29. Oct 2007	hi mates...iam very new to this world...iam a new born baby...is there any mama...or papa..for me here..to teach everything... i downloaded the file..its asking for enetering pass....when i entered 12345 its saying something went wrong...hope had fun and is exiting..whatz this? why is this happeniing..what is the password..
TiGa 30. Oct 2007	Reading the solutions or watching the video should help you.
Andrey_Kolokol 30. Oct 2007	How can I submit my solution?
TiGa 30. Oct 2007	The submission of solutions is closed for this crackme. Try solving another one instead.
Robocop131313 19. Jul 2009	Can somebody help me? I don't know where I can find the letters from the first password. I know it has to be PaSSw0rD because I read the solutions. But I can't find where they get the letters Q,b,...,E. Can you help me explain how they do that?
br0ken Author 21. Jul 2009	Robocop, I'm assuming you are using ollydbg for debugging. Set BP at 004013F6 -> F9 -> Enter any 8 digit password -> Enter -> when olly breaks, right click on that opcode -> Follow in dump -> Memory address. You will the string QbTTx1sE in the dump (ASCII).

br0ken's CrackMe 3

Download cm3v.zip, 6 kb (password: crackmes.de)
Browse contents of cm3v.zip

Levels
*****

Paper Medal = For Attempting
Bronze Medal = Phishing/Patch
Silver Medal = SelfGen
Gold Medal = Keygen + src + tut
-----------------
For a solution to be valid on crackmes.de, you must do it the GOLD way :)
-----------------

Have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 24. May, 2008
Downloads: 626

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Solutions

Solution by mjones, published 24. aug, 2009; download (12 kb), password: crackmes.de or browse.

mjones has rated this crackme as awesome.

Solution by obnoxious, published 20. aug, 2008; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

br0ken Author 04. Jul 2008	Anyone tried this? Random text here to bypass message filter.
DigitalAcid 04. Jul 2008	Yeah, I think I took a look at this some time ago, but I can't get a Gold Medal ;).
jE! 04. Jul 2008	00401440 movsx ax,cl ________imul eax,eax,67 looks as error, bcoz in HI-word of eax is esp-HIword; shold be just: >mov eax,ecx
br0ken Author 08. Jul 2008	Encrypto also pointed this out. I scanned through the source, didn't see anything fishy. I'm guessing it's the compiler. Here's the vc++ compiled exe, in case you're interested (i used dev c++ before) http://rapidshare.com/files/128189081/vccm3.rar
br0ken Author 10. Jul 2008	To the guy named Mark I didn't remove your comment. It was probably removed by a mod because you posted a name/serial combination. Yes, "br0" and "ken" are constants. They remain the same forever.
ximus 10. Jul 2008	i've made a keygen from crackme. now thinking about tutor...
danK 26. Jul 2008	Hi, I'm new to all of this but I did this crackme.. I'm really bad at math so I didn't really talk about what kind of math problems these were. I'm not sure how to send my .rar file that includes everything so I'll just send the link to br0ken. It was a fun crackme. :)
obnoxious 26. Jul 2008	@dank you can upload .zip archives
obnoxious 20. Aug 2008	its time broken gave me that gold medal. btw br0ken how long did the epic battle last ;)
br0ken Author 20. Aug 2008	Nice work Obnoxious!

br0ken's CrackMe 4

Download Cm4.zip, 6 kb (password: crackmes.de)
Browse contents of Cm4.zip

To do:
*****
Code a bruteforcer and find the pwd.

Rules:
*****
No patching :)

Please read readme for hints/info.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 24. May, 2008
Downloads: 992

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Solutions

Solution by mjones, published 26. jul, 2008; download (136 kb), password: crackmes.de or browse.

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Solution by n1trob3nzene, published 02. jul, 2008; download (67 kb), password: crackmes.de or browse.

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Solution by Haykuro, published 29. may, 2008; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

br0ken Author 25. May 2008	Gloom, well, I may be wrong. But I thought it would be easier if a bruter did the job. Afterall, it's a lvl 1 cme. It's supposed to be very simple :) Anyway, I had to remove your comment, (you posted pwd, sorry!) Also, please excuse my lack of professionalism, what I do in real life is totally different from what I do here. :)
neo_40 25. May 2008	just open ollydbg and set a new origin that's how i do it the easy way...... sorry about breaking the rules!!!!!!!!!!
Haykuro 25. May 2008	br0ken: i posted a solution, without a bruteforcer. I think this is really a 2 sided crackme. You CAN code a bruteforcer for it, or you can just reverse the algo (and reversing is always fun :) You'r not 100% wrong when asking for a bruteforcer, but no point in limiting to 1 solution. neo_40: It may be good to learn by patching first, then later on advancing into breaking down the code before you. But running around shouting at everyone how easy it is to patch is rather frowned upon. Just giving you some advice ;) keep on cracking!
Laurance_1111 26. May 2008	What is a bruteforcer?
DigitalAcid 26. May 2008	A bruteforcer is a program that tries all possible combinations in the hope of finding 1 or more valid serials/keys/whatever.
Laurance_1111 27. May 2008	THX. So, a keygen is a bruteforcer?
br0ken Author 27. May 2008	Keygen (short for key generator) is a small program that generates valid serial(s) for a piece of software. http://en.wikipedia.org/wiki/Keygen Bruter (short for brute-forcer) tries all possible combinations until one or more valid serial is found. This could take a few milliseconds, a few seconds, or even years depending on the algorithm used.
gmaster1440 08. Jul 2008	Hey guys, this is actually the very first crackme, or anything on the matter of reverse engineering, i have successfully accomplished, kind of. I wasn't able to create a keygen or bruteforcer; rather, i have cracked it so no matter what you type (besides the actual key of course :P) it will accept it.
Exorcist1 11. Mar 2015	Thanks for good crackme)! There are at least two ways to solve it. 1) Write a brueforcer 2) Just XORED each byte of 4D11628EBE1D constant with the given bytes)

br0ken's Serial/Keygen Me

Download cm2.zip, 5 kb (password: crackmes.de)
Browse contents of cm2.zip

Serial/Keygen Me 2

Level - 2/10

To do

1. Find a valid password.

2. Make a password generator - ***OPTIONAL***.

Rules

1. No rules, do anything you want, as long as the password works on the unmodified exe.

It's got some basic math involved, shouldn't be much of a trouble.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 26. Mar, 2008
Downloads: 658

Rating

Votes: 7
Crackme is quite nice.

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Solutions

Solution by kofiv, published 17. may, 2008; download (56 kb), password: crackmes.de or browse.

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Discussion and comments

XzzX 27. Mar 2008	Solved. The very last part is quite interesting.
br0ken Author 28. Mar 2008	I'm glad you guys liked my cme. I'm gussing this is the only lvl 2 cme (so far) with the shortest algo! hehe :D Ox87k, I had to delete your comment, i'm sorry :) Please don't post valid serials here, it kinda ruins the fun. I hope you understand ;)
br0ken Author 29. Mar 2008	Dude, no posting valid serial even if its related to your name :P Comment deleted, sorry! :)
ksnrcp 31. Mar 2008	huhu very good man ,i will learn it more in last serial algo made me very headache : ) cause im newbie next time i must win it ,hehehe
ejube 04. Apr 2008	bloody quadratic equations :)
aout 07. Apr 2008	Finding a valid serial and understanding the algo - done, turning the algo into a keygen - FAIL. Might work on that and will post a solution then maybe.
br0ken Author 19. May 2008	Nice tutorial. Everything is explained. I couldn't ask for more :) Well done Kofiv!
costy 19. May 2008	what does "SAR EDX,2" do??
Zaphod 19. May 2008	SAR = Shift Arithmetic Right SAR EDX,2 divides edx with 4. Like SHR, but the carry flag receives the last bit shifted out. Download "opcodes.hlp" ( shouldn't be too hard to find ).
kofiv 19. May 2008	Thanks. I really enjoyed working on this one.
costy 19. May 2008	thank you Zaphod

br0ken's Sleepy Keygenme

Download cme5.zip, 23 kb (password: crackmes.de)
Browse contents of cme5.zip

Sleepy Keygen me

To do
*****

Keygen + src + tut.
This has been tested on xpsp3, and should work on other OSes too. (but not tested)

Rules
*****

1. Rate cme after solving.
2. No patching.

Have fun!

br0ken
16/02/2009
dd/mm/yyyy

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 17. Feb, 2009
Downloads: 490

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by ForFun, published 03. mar, 2009; download (38 kb), password: crackmes.de or browse.

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Discussion and comments

E1xis 15. Feb 2009	Nice stuff br0ken!
br0ken Author 17. Feb 2009	Updated version.
br0ken Author 20. Feb 2009	This might be slightly harder than 2. Maybe 2.5 ? So, its changed to 3 now. Have fun :P
obnoxious 25. Mar 2009	really cool one!!!!!
mjones 25. Aug 2009	I have a question about resolving names. In ForFun's solution, his listing shows a call to fopen at RVA 4013DA; however Olly shows CALL keygenme.00402692 for me. Now, I did gather that this was a call to fopen seeing the previous 2 items pushed onto the stack. I'm just wondering if you got Olly to say it was fopen, or if you just asserted that. Apologies for such a noob question but I googled around for a bit and came back with nothing. Perhaps I just lack the proper terminology.
andrewl.us Moderator 25. Aug 2009	mjones: do you know about IDA? http://www.hex-rays.com/idapro/idadownfreeware.htm
mjones 25. Aug 2009	Hmm, IDA does find the function name properly. So my questions are: 1) Why doesn't Olly? 2) How do I make Olly find the correct function name? 3) How does one build/compile(/or link?) a program to result in this behavior? I suspect questions 1 & 3 are closely related. Again, apologies for the noob questions, this is a hobby for me that I very much enjoy and would like to improve.

br0ken's What is my password?

Download cme6.zip, 14 kb (password: crackmes.de)
Browse contents of cme6.zip

To do
****

Find password.

Rules
****

There are no rules!
You may do anything you want to find the password.
Instructions to verify the pass is inside the cme.

Greets
******

Cyclops, TheCodeCracker, CiTRON, Obnoxious, CB,
Techno and to all those I forgot to mention!

Have fun!
br0ken

04/07/2009
dd/mm/yyyy
11:10 PM

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 04. Jul, 2009
Downloads: 646

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by KernelJ, published 06. jul, 2009; download (5 kb), password: crackmes.de or browse.

KernelJ has rated this crackme as nothing special.

Solution by the hoax, published 06. jul, 2009; download (4 kb), password: crackmes.de or browse.

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Solution by obnoxious, published 06. jul, 2009; download (4 kb), password: crackmes.de or browse.

obnoxious has rated this crackme as quite nice.

Solution by indivisible_int, published 06. jul, 2009; download (2 kb), password: crackmes.de or browse.

indivisible_int has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

obnoxious 05. Jul 2009	Aaah something i was waiting for.......a br0ken crackme. how are you my friend?
andrewl.us Moderator 05. Jul 2009	hehe, going for another gold metal, obnoxious?
obnoxious 05. Jul 2009	working on it :)
br0ken Author 06. Jul 2009	@indivisible_int "....something like ".aspack"" I have no idea about .aspack. I haven't used any packer/protector. The exe you find here is straight out of the release folder. (MS VC++ 6.0) "...Run the program... oh, an access violation!" I didn't get any access violation (xpsp3). I tested it both on naked olly and patched olly. @Obnoxious "...fixed my keyboard..." I'm glad fixed your keyboard. "...I bet this question must have come in br0kens exam" Nah, if I was in grade 4/5, then maybe. But now, i'm a few years too old :(
obnoxious 06. Jul 2009	seriously i fixed my keyboard :)
indivisible_int 06. Jul 2009	yeah,really, PEiD says it is not packed... maybe it was problem with one of my plugins or something else...

brainbusy's ubc #1

Download brainbusy_cm1.zip, 228 kb (password: crackmes.de)
Browse contents of brainbusy_cm1.zip

name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Oct, 2001
Downloads: 2623

Rating

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Solutions

Solution by detten, published 11. oct, 2001; download (38 kb), password: crackmes.de or browse.

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Solution by stealth fighter, published 11. oct, 2001; download (7 kb), password: crackmes.de or browse.

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Solution by figugegl, published 11. oct, 2001; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

bRaiN_faKKer's CrackMe1f

Download crackme1bf_fixed.zip, 5 kb (password: crackmes.de)
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Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Oct, 2002
Downloads: 1687

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Solutions

Solution by luucorp, published 31. dec, 2002; download (1 kb), password: crackmes.de or browse.

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Send a message to Bratalarm »

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redoC 23. Jun 2010	program freeze, is it intended?
_ghandi_ 23. Jun 2010	I've seen variations on this idea in commercial applications and i'll agree that without a starting point, its like searching for a needle in a haystack.
brangelito Author 23. Jun 2010	Yes, program freeze is intended.
brangelito Author 23. Jun 2010	Ghandi: Well, it's impossible without a starting point. You have a 1 in 2^128 chance to find the correct serial, if you just pick a random one. :)
_ghandi_ 23. Jun 2010	Yep, quite a large keyspace to be searching...
_ghandi_ 24. Jun 2010	But 'impossible' is such a big word, i'd be more inclined to use the word 'improbable' because there is still the possibility that it could be discovered/bruteforced without any hints, as small as it is that chance makes it possible.
brangelito Author 25. Jun 2010	Nobody solved this one yet? :)
hound 28. Jun 2010	All done then. I will write up a solution some time today.
brangelito Author 28. Jun 2010	Great! I'm looking forward to your solution!

Bratalarm's Just a little Crackme

Download crackme.zip, 2 kb (password: crackmes.de)
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Just a little Crackme and some math.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 01. Mar, 2005
Downloads: 3306

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by sraboy, published 23. sep, 2015; download (28 kb), password: crackmes.de or browse.

sraboy has rated this crackme as quite nice.

Solution by wodahS ehT, published 27. may, 2005; download (183 kb), password: crackmes.de or browse.

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Solution by Kreet, published 11. mar, 2005; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

adlers 07. Jun 2012	The purpose is to create a keygen probably(but why does this call crackme ?)...otherwise this is too easy.
sraboy 13. Aug 2015	It's a simple-ish keygenme, especially with the hint from the developer but it was fun to recreate in C.
crackme101 15. Feb, 03:36	Damn this is a tough crackme. Math is my weakest subject. Bratalarm, you kick ass. I've been up against this damn thing the whole day. I will beat it eventually...
crackme101 16. Feb, 04:11	Whoever he or she is, they knew what they were doing.

bringola's Bring_Crackme

Download Bringola_crackme1.zip, 414 kb (password: crackmes.de)
Browse contents of Bringola_crackme1.zip

Fishing Serial only

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 23. Dec, 2008
Downloads: 464

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by draww, published 26. jun, 2012; download (13 kb), password: crackmes.de or browse.

draww has rated this crackme as nothing special.

Solution by Coderess, published 24. may, 2010; download (15 kb), password: crackmes.de or browse.

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Discussion and comments

BoRoV 24. May 2010	Good work, br0 ;)
Coderess 24. May 2010	Thanx brother ;D Sorry for bad formatting in solution
TGm 11. Jun 2012	I am the author of this crackme, and seeing the solution, it is not correct
draww 18. Jun 2012	i've submitted my solution (16. jun)

BRK12345's Breaker's Crackme # 3

Download Breaker__s_Crackme_#_3.zip, 5 kb (password: crackmes.de)
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Breaker's Crackme # 3
RULEZ:
No patcing
just make a keyGen to solve it
The make a tut with a valid keyGen!!

Thanks to->Breaker
Coder->Breaker
Have fun cracking!!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 22. Mar, 2008
Downloads: 838

Rating

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Solutions

Solution by kbpower, published 02. oct, 2008; download (5 kb), password: crackmes.de or browse.

kbpower has rated this crackme as boring.

Solution by br0ken, published 29. mar, 2008; download (40 kb), password: crackmes.de or browse.

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Solution by MACH4, published 29. mar, 2008; download (16 kb), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 22. Mar 2008	The crackme doesn't close good (it stays active in the process list). Anyway, nice and easy crackme ;).
BRK12345 Author 22. Mar 2008	I didnt noticed that it stays in the process list!But anyway at least it works ;)!If you solved it then write and a solution(if you want of course)!
m3th3lesh 23. Mar 2008	hello brk.. in the first attempt i got success in activating all the buttons,textboxes, and crackme command button. i m a newbie so i dont know how 2 make a keygen....i hope u will give a hint ..
Xspider 23. Mar 2008	Nice one and simple!!
br0ken 25. Mar 2008	Arrgh, tracing a VB proggie was pain in the ass :P
Ox87k 25. Mar 2008	Tracing? Hum.. Try to fish a serial, take a pen and paper and use your brain! It's not hard to understand how to generate the serial without tracing anything! ;)
br0ken 25. Mar 2008	I have already submitted a solution :)
br0ken 25. Mar 2008	And ya, please think twice before you insult someone.
Ox87k 25. Mar 2008	insult? Ahahahah... no comment
br0ken 25. Mar 2008	Ox87k, check your PM.
br0ken 25. Mar 2008	Okay, things are back to normal :)
m3th3lesh 25. Mar 2008	ox87k, u r really a expert then submit the solution..... instead of giving knowledge here... ThanX 2 br0ken....
cosmos 25. Mar 2008	Tracing VB is better than Delphi crap
Ox87k 25. Mar 2008	m3th3lesh, are you kidding me? If you want to see some of mine solutions just go to my profile. I have no other to said. For me this discussion is closed.
Ox87k 25. Mar 2008	And here is my keygen for peoples who try to attack me: http://www.mediafire.com/?jyejyg4zmmn I've no time to write a solution. Sorry
BRK12345 Author 26. Mar 2008	Nice 0x87k(for the keyGen) and br0ken(I hope to see soon your solution)!Hope to see more solutions coming!! P.S. Stop fighting against each other for silly things!
Ox87k 30. Mar 2008	Well done guys, very good solutions. Mods: Can you accept another LITTLE solution? If you tell me yes then i'm going to write a little solution about how to enable the buttons and the textbox with only Olly! :-)
synak 30. Mar 2008	@0x87k - I'd be interested in knowing how to enable via Olly :-)
DigitalAcid 30. Mar 2008	I also enabled them with Olly. But you can only save 1 changed thing at a time.
cosmos 30. Mar 2008	I also like to see through olly.
TiGa 30. Mar 2008	@Ox87k Sure, as long as it brings something new over the others, send it in.
Ox87k 30. Mar 2008	@DigitalAcid: Why 1 item at time? You can make more change and save them all at the same time! ;) @all & Tiga: 0k, i'm going to run my block-notes!
DigitalAcid 30. Mar 2008	I'm changing it in the dump, and it only saves 1 thing to file. So, i got to do it 5 times and save 5 times =). Tried doing them all 5 at once and it only saved 1...
Ox87k 30. Mar 2008	@DigitalAcid: You have to: - modify your pieces of code - right click on diasm (wherever you want) -> Copy to executable -> All modifications -> Press the "Copy All" button - in the new window -> right click (wherever you want) -> Save File (select a new file or overwrite the original) Now you should have all modifications saved in your new file!
syhs89 21. Apr 2008	in ollay which is cmd.enabled = false ?? i got vbreformer but it dun works out well... = = is it full version or free version?

BRK12345's Breaker's Crackme #4

Download Breaker__s_Crackme_#4.zip, 9 kb (password: crackmes.de)
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Breaker's Crackme #4
This is my 4th Crackme and I made it a bit more difficult!
RULES
THe rules are the same
no patching with the exception of nags and enables
make keyGen
write tut
Easy things
Good luck and Happy Cracking :D

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 17. Apr, 2008
Downloads: 368

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by MACH4, published 23. apr, 2008; download (786 kb), password: crackmes.de or browse.

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Discussion and comments

MACH4 18. Apr 2008	Hi Breaker, Thanks for a very nice .NET CrackMe! Video solution in queue! I enjoyed cracking this one! MACH4
BRK12345 Author 18. Apr 2008	Thank you for your good words MACH4! I'm waiting for your solution!!
basfreak 06. Jul 2008	It was kinda weird with al that names but i did it.

BRK12345's Crackme/KeyGenme1-Breaker

Download CrackmeKeyGenme1.zip, 9 kb (password: crackmes.de)
Browse contents of CrackmeKeyGenme1.zip

RULEZ:
NO patching!
Just make a KeyGen from the algorithm!Come'on its too easy!
Write a tutorial including the KeyGen!

Thanks to -> Breaker
Coder -> Breaker

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 17. Mar, 2008
Downloads: 794

Rating

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Solutions

Solution by r00ster, published 03. apr, 2008; download (31 kb), password: crackmes.de or browse.

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Solution by br0ken, published 21. mar, 2008; download (76 kb), password: crackmes.de or browse.

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Solution by MACH4, published 21. mar, 2008; download (36 kb), password: crackmes.de or browse.

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Discussion and comments

BRK12345 Author 19. Mar 2008	anybody who made a keyGen?
MACH4 19. Mar 2008	Just to easy, but thanks, nice to see more net crackmes! MACH4
BRK12345 Author 20. Mar 2008	hehe i know it is easy it is my 2nd one ^^!
BRK12345 Author 20. Mar 2008	!new crackme submitted ^^!(this time i didnt used .NET so it's a bit more difficult!)!

BRK12345's CRACKME(KeyGen)-BREAKER

Download Crackme(KeyGenme)-Breaker.zip, 7 kb (password: crackmes.de)
Browse contents of Crackme(KeyGenme)-Breaker.zip

The Rules are very simple:
No Patching
Just make keyGen and write a tutorial!
It is my first crackme so it is very simple!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 17. Mar, 2008
Downloads: 670

Rating

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Solutions

Solution by r00ster, published 08. apr, 2008; download (31 kb), password: crackmes.de or browse.

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Solution by br0ken, published 21. mar, 2008; download (80 kb), password: crackmes.de or browse.

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Solution by Zuma555, published 21. mar, 2008; download (9 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

BRK12345 Author 19. Mar 2008	anybody who solved it?
Ox87k 19. Mar 2008	BRK12345, c'mon, both crackme are level 1 and there are 7 solutions in queue so wait! Solved them take 20 seconds! XD
DigitalAcid 19. Mar 2008	Weird, because crackmes get approved so quickly, but solutions aren't.
MACH4 19. Mar 2008	Yea, thought this one would be a progression from the last one but was still entry level !
BRK12345 Author 20. Mar 2008	sry guys,i didnt see the solutions in queue!I 'm going to make now a non .NET caz .NET are too easy solved with .NET Reflector ^^
BRK12345 Author 20. Mar 2008	new crackme submitted ^^!(this time i didnt used .NET so it's a bit more difficult!)
jvwarrior 10. Apr 2008	BRK you made the crack find the length of the username right? But how would you find that length and how would you multiply it?

brockcooper1's RandomHero .NET Crackme #1

Download DOT_Net_Crackme_1.zip, 5 kb (password: crackmes.de)
Browse contents of DOT_Net_Crackme_1.zip

This is my first crackme for Crackmes.de, hope you have fun :) There is no packing :)
NOTE: you can also keygen this if you like :D

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 10. Jan, 2009
Downloads: 416

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by Mayhem, published 03. feb, 2011; download (320 kb), password: crackmes.de or browse.

Mayhem has rated this crackme as nothing special.

Solution by The So;X, published 30. jan, 2009; download (1742 kb), password: crackmes.de or browse.

The So;X has rated this crackme as quite nice.

Discussion and comments

SubmiN\|KinG 10. Jan 2009	This is not worth a score of 3 in difficulty guys, this is a very simple rip-n-copy crackme. Difficulty by my short 30sec into it, 1....
WinFan 11. Jan 2009	I agree, this can be done very easily, i also think difficulty should be 1 ...
brockcooper1 Author 12. Jan 2009	If its so easy then please submit a solution.... :)
Wasted_Bytes 14. Jan 2009	not so difficult to keygen..solution is on the way :)
The So;X 02. Feb 2009	Nice one go on dude
bLaZeD 19. Jan 2011	Done http://img339.imageshack.us/img339/1867/91845823.png
Mayhem 24. Jan 2011	I also submitted a solution, thanks for the crackme.
ideku_nih 10. Feb 2011	Done too http://img593.imageshack.us/img593/7527/wek.png

Bswap's Assassination

Download assassination.zip, 40 kb (password: crackmes.de)
Browse contents of assassination.zip

Just KeygenMe

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 31. Dec, 2003
Downloads: 1682

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Solutions

Solution by kao, published 01. jan, 2004; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

Bswap's A Small crackme!

Download small.zip, 2 kb (password: crackmes.de)
Browse contents of small.zip

;) Try it :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 06. Nov, 2003
Downloads: 2041

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Solutions

Solutions

Solutions

Solution by arpm, published 07. sep, 2008; download (949 b), password: crackmes.de or browse.

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Discussion and comments

dakrone 30. Jun 2008	I'm failing to understand how you could ever generate a usable key without patching the program. Looking at the assembly: CALL LittleMa.004019E9 MOV DWORD PTR DS:[40334B],EDI MOV EAX,DWORD PTR DS:[40334B] MOV EBX,DWORD PTR DS:[403330] MOV DWORD PTR DS:[4032E6],EAX XOR EAX,EAX MOV DWORD PTR DS:[4032EA],EBX PUSHAD ; push all registers PUSH 0DEAD POP EAX PUSH 0BEEF POP EBX PUSH 0AAAAAAF POP ECX BSWAP ECX BSWAP ECX POPAD ; pop all registers OR AL,1 ; if eax == 1, then we can register correctly OR EAX,EAX ; set zero flag if eax is 0 JNZ LittleMa.004015F0 The important instruction: XOR EAX,EAX (skipped, nothing happens to EAX) PUSHAD (skipped) POPAD OR AL,1 OR EAX,EAX JNZ LittleMa.004015F0 ; jmp to registering the program Since the XOR sets EAX to 0, and all registers are then pushed and popped, EAX returns to 0 after the POPAD. Therefore it will always be 1 after the ORing it with 1 and the zero flag will never be set. Is this on the right track? I'm failing to see how it's possible to get EAX to be zero so the flag is set.
Bswap Author 30. Jun 2008	Yep, right...... This way the registerflag (eax) will never been set. It's a level 1 so how hard could it be..........;)
HMX0101 30. Jun 2008	@dakrone: i'll give you a hint..."timer"... ;) i hope i don't spoil too much :D
~misunderstood~ 29. Jul 2008	I don´t understand how this works... I found the important call, I see where in dump the value compared to my input is stored, but how is it generated, and where? I recognized some places where timers are set, but on what do they depend? Could someone please PM me or write a solution for this? Thx

Bswap's Lopke

Download lopkecrme.zip, 6 kb (password: crackmes.de)
Browse contents of lopkecrme.zip

Looking for a serial number. (keygen = tremendous)

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Dec, 2003
Downloads: 1769

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Solutions

Solution by Bswap, published 04. dec, 2003; download (3 kb), password: crackmes.de or browse.

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Solution by kao, published 01. dec, 2003; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

Bswap's Morgana 1.49

Download Morgana.zip, 32 kb (password: crackmes.de)
Browse contents of Morgana.zip

Morgana 1.49

Goal : Make a key generator.

Extra info: At the beginning you will get some info at the end you have to find your own way.
There are lot of possibilities, believe me.

This was just for private fun and training.
In fact this is good to unsolved this one.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 05. Feb, 2009
Downloads: 545

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Solutions

Solution by E1xis, published 15. feb, 2009; download (139 kb), password: crackmes.de or browse.

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Discussion and comments

E1xis 08. Feb 2009	Nice stuff, perfect for beginners.
Bswap Author 09. Feb 2009	Your totally right, just some practice… ;0)
main 12. Feb 2009	Yup, really nice for beginners. Thanks! :)
Bswap Author 12. Feb 2009	good! Please write a tutor, so other people can understand it.
tony 04. Jun 2009	it is very easy，but the routine is very good for GUI

Bswap's Puzzle Crackme

Download puzzlecrack.zip, 29 kb (password: crackmes.de)
Browse contents of puzzlecrack.zip

A color puzzle (crackme)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 31. Aug, 2003
Downloads: 1995

Rating

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Solutions

Solution by Bswap, published 23. sep, 2003; download (414 b), password: crackmes.de or browse.

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Solution by harlequin, published 12. sep, 2003; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

Bswap's Ribbere 1.4

Download Ribbere_1.4.zip, 80 kb (password: crackmes.de)
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Ribbere 1.4, (difficulty 2)

The Program is 100% written in ASM ,Not packed or really protected in any way.

Goal : Try to make a key generator.

(it is not that difficult, when you understand it…… you will love it).

This was just for private fun and training.
In fact this is a really easy key to unsolved.

And the usual disclaimer:
Whatever happens when you running this program, I
am not responsible for anything.

If you have any comment or questions leave a comment on

www.crackmes.de

Bye and good luck - Bswap - Holland

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 21. Jun, 2008
Downloads: 560

Rating

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Solutions

Solution by obnoxious, published 02. jul, 2008; download (17 kb), password: crackmes.de or browse.

obnoxious has not rated this crackme yet.

Discussion and comments

simonzack Moderator 21. Jun 2008	indeed, really easy, could've guessed the key at first :)
obnoxious 22. Jun 2008	making a keygen would be too difficult taking into account all the possible combinations. So i will wait and see who comes up with the keygen taking into account all possible combinations;)
obnoxious 22. Jun 2008	I know that is a valid serial but have you taken into account the other possibilities.
obnoxious 24. Jun 2008	he he keygen ready. i write silly comments :)
hackereha 09. Aug 2008	i think there's some kind of bug in this crackme:/ it compares the entered serial if it is 15 and when i entered a 15 serial for example 012345678912345 it says registered lol:P or its just me?
obnoxious 09. Aug 2008	there is no bug.you should read my tut
hackereha 10. Aug 2008	ohh now i see obnoxious thx for the tut:)
Bswap Author 11. Aug 2008	012345678912345 -- Yes how simple it can be he... (BTW it is no bug ;)
sn0wworld 13. Aug 2008	Nice crackme, I liked it. Made keygen, once reversed keygen very easy to code but does not consider all possibilities for the serial.

Bswap's Ribbere 1.42

Download Ribbere1_42.zip, 71 kb (password: crackmes.de)
Browse contents of Ribbere1_42.zip

Ribbere 1.42, (difficulty 2 - 3)

The Program is 100% written in ASM ,
it’s packed but not that hard to oversee it.

Goal : Make a key generator.

(it is not that difficult,
when you understand it I hope you like it).

This was just for private fun and training.
In fact this is good to unsolved this one.

Bye and good luck - Bswap - Holland

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 23. Jun, 2008
Downloads: 514

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by obnoxious, published 02. jul, 2008; download (16 kb), password: crackmes.de or browse.

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Solution by r2nwcnydc, published 02. jul, 2008; download (6 kb), password: crackmes.de or browse.

r2nwcnydc has rated this crackme as quite nice.

Discussion and comments

obnoxious 23. Jun 2008	Same problem as the first a lot of possibilities have to be taken into account i cant make a keygen still :(
HMX0101 23. Jun 2008	what do you mean, obnoxious? it can be easily keygenned! :P
obnoxious 23. Jun 2008	is that i thought i had to look at a lot of possibilities maybe thats so i m not sure did you try the first 1 by bswap
obnoxious 23. Jun 2008	thanks HMX0101 i just figured out how to make the keygen..................
pratappv 23. Jun 2008	HMX0101, Can u pls post the solution?
HMX0101 23. Jun 2008	Lol, this crackme is intended for newbies.. and i don't think i classify for this category :PP sorry... btw, its a simple crackme, just take a look carefully to the algo! and try to write a kg!... i think obnoxious is going to write a sol ;)
ultrasnord 24. Jun 2008	submit solution please..
obnoxious 01. Jul 2008	solved. does anybody need a tutorial on it. if yes will post the tut.
ultrasnord 01. Jul 2008	yes for sure....
5y5e1 01. Jul 2008	ha.. good... i did it
5y5e1 01. Jul 2008	it s really easy, when i understood it =)
hackereha 07. Aug 2008	i think there's some kind of bug in this crackme:/ it compares the entered serial if it is 15 and when i entered a 15 serial for example 012345678912345 it says registered lol:P or its just me?:S
hackereha 07. Aug 2008	ahh my bad... u have fixed that issue i think mine was 1.4 version:)

Bswap's Super Funky 0.82

Download superfunky082.zip, 17 kb (password: crackmes.de)
Browse contents of superfunky082.zip

Something original.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 28. Feb, 2003
Downloads: 2145

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Solutions

Solution by harlequin, published 21. mar, 2003; download (2 kb), password: crackmes.de or browse.

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Solution by ShadowKat, published 06. mar, 2003; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

btcentral_test's Application Security v1.0

Download Secure_Activation.zip, 173 kb (password: crackmes.de)
Browse contents of Secure_Activation.zip

Hi All,

This isn't your usual crackme - We have developed a secure activation method for use on our commercial programs,

Basicly what we would like you to do is to try and crack this program, both the activation and the trial limitations.

You can do this in anyway you want - keygening, cracking, patching etc.

We just want to see how easy it is for you to crack.

Thanks & Happy Cracking
BTCentral Software Development.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: (Visual) Basic

Published: 22. Aug, 2005
Downloads: 850

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by DaXXoR 101, published 23. aug, 2005; download (176 kb), password: crackmes.de or browse.

DaXXoR 101 has rated this crackme as quite nice.

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Discussion and comments

btcentral_test Author 22. Aug 2005	Please submit any solutions, we did not know what difficulty level to put this as so we put it at 5, anyway it should be enough of a challenge for most people! â€“ It has a few special checks built in, and the activation just to make it a little harder Note: no CRC etc. checks are used Enjoy!
DaXXoR 101 22. Aug 2005	Solved it, submitted solution. I wish more software developers would do this :)
btcentral_test Author 23. Aug 2005	Thanks for submitting a solution DaXXoR_101! Excellent crackme! Anyone else that can provide alternative methods of cracking, please feel free to submit solutions! And we hope you all look forward to v1.1! Also be sure to checkout the Trial part of the program, we left a hidden feature there on purpose - that would greatly help anyone else willing to try to crack this - another idea: change the activation URL - of course all these ideas will be defeated in v1.1 which will be available soon! Enjoy! BTCentral Software Development.
btcentral_test Author 23. Aug 2005	Ok - we've just submitted v1.1 - this version contains way more protection features and is going to be quite a bit harder to crack - the activation method has changed slightly - and the trial stuff has been re-done!

btcentral_test's Application Security v1.1

Download Secure_Activation_v1.1.zip, 143 kb (password: crackmes.de)
Browse contents of Secure_Activation_v1.1.zip

Hi All!

This is version 1.1 of our crack/patch/keygen me!

New Features in this version:
* Packed using UPX
* Activation Method Changed
* Trial Method Changed
* Many tweaks to make more secure
* Hardware ID - to make it even more interesting for you :P
* Many new checks

This version should hopefully be quite a bit harder than the last version!

Description of what we want you to do (taken from v1.0):

This isn't your usual crackme - We have developed a secure activation method for use on our commercial programs,

Basicly what we would like you to do is to try and crack this program, both the activation and the trial limitations.

You can do this in anyway you want - keygening, cracking, patching etc.

We just want to see how easy it is for you to crack.

Thanks & Happy Cracking
BTCentral Software Development.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: (Visual) Basic

Published: 24. Aug, 2005
Downloads: 904

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by DaXXoR 101, published 26. aug, 2005; download (271 kb), password: crackmes.de or browse.

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Discussion and comments

btcentral_test Author 24. Aug 2005	Hi All! Here's our new crack/patch/keygen me! It's had quite a bit of work done on it, and I hope you enjoy trying to bypass the new protection features on this version! BTCentral Software Development. - BTCentral_Test
DaXXoR 101 24. Aug 2005	Solved it again :) submitting solution.
btcentral_test Author 24. Aug 2005	Ok then... obviously wasn't much harder Well, there's always the next version!

btcentral_test's BTCentral Crackme 3 - EXE Protection Crackme

Download Crackme.zip, 60 kb (password: crackmes.de)
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BTCentral Crackme 3

I have written a protection method for EXEs, this protection method contains multiple checks throughout and no error messages. If the file does not load your crack simpily does not work.

Aims:

1) Remove EXE's Protection.
2) Change text displayed on the EXE form.

Have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 15. Jun, 2006
Downloads: 755

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by HMX0101, published 20. jun, 2006; download (31 kb), password: crackmes.de or browse.

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Solution by EsKiMo, published 20. jun, 2006; download (30 kb), password: crackmes.de or browse.

EsKiMo has rated this crackme as nothing special.

Solution by TRAVAKUR, published 20. jun, 2006; download (7 kb), password: crackmes.de or browse.

TRAVAKUR has rated this crackme as boring crap.

Solution by Ank83, published 20. jun, 2006; download (103 kb), password: crackmes.de or browse.

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Discussion and comments

merker 18. Jun 2006	Hello btcentral_test, if you patch only one byte in EXERes.dll, the file will be loaded as child-process. Do you accept this as part of the solution ? regards, merker
HMX0101 18. Jun 2006	It can be done changing a jump :D
btcentral_test Author 21. Jun 2006	Any solutions are welcome, thanks everyone for your submissions.

BUBlic's Backtracking #1

Download Backtracking_#1_KeygenMe_by_BUBlic.zip, 32 kb (password: crackmes.de)
Browse contents of Backtracking_#1_KeygenMe_by_BUBlic.zip

Here comes the first keygenme from my new keygenme series, I think this one is nice, if you have to kill a hour.

"Backtracking is a type of algorithm that is a refinement of brute force search. In backtracking, multiple solutions can be eliminated without being explicitly examined, by using specific properties of the problem." (Wikipedia)

Attention: the whole check procedure is about ~40 asm lines, so this one is not for those of you, who want to learn asm, but for those who like clean algorithms and thinking about simple but still interesting problems. So write a keygen ;)

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 17. Jun, 2007
Downloads: 660

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by hound, published 22. jun, 2007; download (18 kb), password: crackmes.de or browse.

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Discussion and comments

TiGa 19. Jun 2007	Is there more than one possible serial?
BUBlic Author 19. Jun 2007	There are about 10^6 unique serials to solve that problem ;) Of course it's simple to find a few serials on a piece of paper, but you really solved it, when your keygen got them all.
TiGa 20. Jun 2007	So the keygen needs to find 10^6 answers every time it is run? or just a random valid one each time? I'm not talking about bruteforcing the whole thing but testing only the plausible ones.
BUBlic Author 20. Jun 2007	The keygen should not generate all the serials each time, but just throw out some random ones. The keygen algo should be able to generate as many serials as possible above 256 should be ok as well ;)
hound 21. Jun 2007	I think this one is easier than the Xor_2_Zero. Nearly got a keygen made..... Fun crackme though!
Crosys 23. Jun 2007	Solved it!, really fun crackme, thanks BUBlic
BUBlic Author 25. Jun 2007	I think I can tell the problem behind it now: it is the 16-queens problem ;) or n-queens

BUBlic's ElGamal keygenme #1

Download ElGamal_keygenme_1_by_BUBlic.zip, 132 kb (password: crackmes.de)
Browse contents of ElGamal_keygenme_1_by_BUBlic.zip

Do you find RSA boring while you still can't get ECC?
Here is a very basic emplementation of the discrete logarithm problem in ElGamal.
Have fun.

Disallowed:
-patching
-bruteforcing in the keygen
-crc32 reversing

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 10. Apr, 2006
Downloads: 846

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by HMX0101, published 21. oct, 2008; download (30 kb), password: crackmes.de or browse.

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Discussion and comments

m@rio_crk 12. Apr 2006	uff at least! ;) You made me confused there for a lil' bit, (you cannot make serial for every name in this crackme) Anyway.. you made really nice work with this kgnme. Cheers :)
pdrill 17. Apr 2006	Elgamal??, CRC cant be greater that p-1. (is this a bug?). Only first time will the change base function work when it's init with 6. (is this also a bug?)
jB_ 18. Apr 2006	Strange implementation of ElGamal encryption. ElGamal security relies on discrete logarithm problem. In your implementation you don't have to compute it. It is a pity... I guess the "Change base" function is really bugged, I don't see why this could be coded on purpose. pDrill : CRC "can't" or "can" be greater than p-1? It is shifted, so it is 24 bit max, this is ok.
BUBlic Author 18. Apr 2006	Hi guys, I'm sorry for that one. It was my very first attempt to code a keygenme base on the DLP, but as I've seen now it doesn't. Maybe its still good to learn a bit about modular arithmetics (especially d=ab^c mod p). Indeed the last days I learnd a lot, and a better one promised will follow.
pdrill 19. Apr 2006	Hi, I hop I dont spoil any thing by posting this but the only thing you have to do is to compute "serial = crc * 91C7C9 mod E476A3" and convert to your input type. (91C7C9 = 638297^-1 mod E476A3). If CRC gets greater than p-1 you cant make a key for that name. And for some names the CRC will get greater. Like "Name: Stanley". (You should always reduce it mod p to avoid this.)
jB_ 19. Apr 2006	Oups pDriLl you're right with the CRC. And your solution is ok. BUBlic I wait for the next one. Take your time =)

BUBlic's MyVM #1

Download MyVM_#1_KeygenMe_by_BUBlic.zip, 35 kb (password: crackmes.de)
Browse contents of MyVM_#1_KeygenMe_by_BUBlic.zip

The name says it all - it's a VM.
The algo is quite simple, but you have to understand the VM.
I put valid userdata in the about if you find a bug.

Difficulty: 7 - Very hard
Platform: Windows
Language: C/C++

Published: 26. Jul, 2007
Downloads: 755

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by waganono, published 09. aug, 2007; download (73 kb), password: crackmes.de or browse.

waganono has rated this crackme as quite nice.

Solution by KernelJ, published 07. aug, 2007; download (59 kb), password: crackmes.de or browse.

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Discussion and comments

opcode0x90 26. Jul 2007	The serial procedure is not in VM, kinda defeats the purpose of VM.
BUBlic Author 26. Jul 2007	The serial procedure IS in the VM. Of course it's not difficult to patch it, but this is not your task.
KernelJ 27. Jul 2007	I found a line where you overflow one of your blocks of allocated memory by a whole DWORD! A 0xABABABAB dies every time it eats your serial lol. I'm not entirely sure what effect... if any... that has on, well... anything... though... Let's just call it a mistake...
KernelJ 27. Jul 2007	Another comment - does this crackme ever release ANY of the memory it receives. Definitely not all of it anyway... I wonder if it's possible to check your serial enough times to stop the thing working
BUBlic Author 28. Jul 2007	Sorry for those little mistakes (due to the nature of allocating memory the effects aren't noticeable on my system, but could be fatal on an other). If any/none name/serial combination (see about) works then just patch: 004015C7 \|. 68 00080000 PUSH 800 to: 004015C7 \|. 68 00080000 PUSH 7FC Thx KernelJ, those four bytes which could be overwritten are the most important ones.
KernelJ 28. Jul 2007	The effects weren't noticable to me either, but I knew I could make it noticable. So jammed the enter key held down on the serial checking button and the following error box (therefore filling up my RAM bit by bit) for about 50 mins roughly and then when I came back to the computer I stopped it, and when I clicked back on OllyDbg it took a few seconds to activate because it had to load everything again that was cached in virtual memory! Also I found that even though usually memory was coming from 0x08000000 or 0x0A000000 ranges now it was coming from 0x15000000. And checking memory dumps between this and 0x0A000000 the whole lot was filled with the same rubbish. So definitely memory leakage there... That patch is not critical, but recommended. I don't see any reason why it would break any of the serial checking so don't worry about it.
waganono 07. Aug 2007	I just keygen this one, great work BUBlic! I'll send you my disassembler & keygen as soon as possible.
Ox87k 07. Aug 2007	@waganono: Another solution will be good (i think) for all of us. KernelJ did a great job with his solution but another one is good!
saitob 07. Aug 2007	Quote from 'About': "Maybe there are still skilled reversers, who are able to keygen this one and will do so, but I don't think there will be a solution. /Quote This is a great example wichg shows that thing's don't allways end up as expected! Great work BUBlic and KernelJ.
BUBlic Author 07. Aug 2007	Indeed, the "and will do so" is actually the part of the sentence with the most weight (since before submitting I let some reversers, who are actually really skilled take a look at that; some said they could but the actually have to little free time atm.). And the same way, I suppose, it is at my Security Pow -2 keygenme, to write which I had to study all the algorithm description papers first (since it's a unusual algo), so I to break it ppl, actually, have to do same. Howev, you've exceeded all of my expectations, great job, really!
waganono 07. Aug 2007	@BUBlic I'll just send you my work to your @. I'm writing a short tutorial now. The VM is well coded and provides good functionalities, i really appreciate your work.
KernelJ 07. Aug 2007	[quote]some said they could but the actually have to little free time atm[/quote] lol so what you're really saying is that I had too much time on my hands. Maybe true... I did like the way your VM worked mostly. I think my main criticism at this point was how you handled the LEA value scaling (or didn't handle). The way the actual bytecode itself was coded seemed very odd to me. Extremely inefficient compared to what was possible. Whether this was just an attempt to make it harder to reverse I'm not entirely sure... Anyway, I have gained some valuable experience from completing this keygenme. So thankyou! And also thanks all for your comments on my solution.
waganono 08. Aug 2007	@BUBlic I just have sent my solution to mods. @KernelJ I have read your tutorial and i see we don't have the same way to solve it, so I complete your explanations. You made good work, really. You seems to be a "still skilled reverser" :)
KernelJ 10. Aug 2007	Well I may as well read yours... Hmm, what on Earth is a 'kind of' MD5??
waganono 11. Aug 2007	Just cause of 4 classic cstes (+pad) : 67452301, EFCDAB89,98BADCFE,10325476. Do you have noticed them? Or maybe it is a well kwnow algorithm, hash? Do you know?

BUBlic's Security Pow -1

Download Security.Pow.-1.KeygenMe.by.BUBlic.zip, 26 kb (password: crackmes.de)
Browse contents of Security.Pow.-1.KeygenMe.by.BUBlic.zip

Welcome to my first Security^-1 keygenme, its a small part of my current work experimenting with ... *you'll see what*.
For more info read the rules.
So good luck solving it ;)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 02. Feb, 2007
Downloads: 713

Rating

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Solutions

Solution by andrewl.us, published 30. jan, 2009; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

BUBlic Author 01. Feb 2007	Thats new for me here at crackmes.de - level 4 keygenme with ~downloads still neither a comment nor a solution or an advice. Is this keygenme so bad?
Ox87k 01. Feb 2007	maybe it's a little bit hard XD but surely not bad!
Leztar 02. Feb 2007	hi nice crackme but with a little bug after the cheating check. so try the follow exemble Leztar 11100111101011100010010111100011 after cheating message the crackme goes registered. Leztar 11133111131311133313313111133311
BUBlic Author 02. Feb 2007	Ahhh, damn very very sorry about that one - thats was late at night and I forgot to create a real cheating check, so indeed the two of the serials you found out are "cheats". I'll going to upload a better version as soon as possible!
BUBlic Author 02. Feb 2007	Updated, ty for helping me to improve it
dreak 03. Feb 2007	In the about box you say "one name: lots of serials!" does that mean there is only one correct user name which has lots of serials, or, each user name has lots of correct serials? (just curious if I'm doing the right thing)
BUBlic Author 03. Feb 2007	No, no that means that for every single name there are many serials (so if you had luck and found a strategy to generate only one serial per name its not finished yet).

BUBlic's Security Pow -2

Download Security.Pow.-2.KeygenMe.by.BUBlic.zip, 28 kb (password: crackmes.de)
Browse contents of Security.Pow.-2.KeygenMe.by.BUBlic.zip

Finally it's done: welcome again to the next level (indeed there are some level in between) keygenme - Security^-2 keygenme. I wish everyone good luck with generating serials for that one, now it's gonna be harder than ever in any of my keygenmes.

For more info (or some hints) read the readme. I think if you are experienced enough, you'll have lota fun with this one;)

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: C/C++

Published: 13. Feb, 2007
Downloads: 702

Rating

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Solutions

Solution by divinomas, published 15. oct, 2008; download (14 kb), password: crackmes.de or browse.

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Discussion and comments

BUBlic Author 07. Mar 2007	Heres the same silence like at the #1, so facing that fact I suppose either I did a good job implementing the protection or nobody likes the protection itself or my implementation.....
divinomas 01. Oct 2008	Yep,this is a NTRU crackme.Never saw in other crackmes or commercial softwares.Good job,BUBlic :)

BUBlic's Thales keygenme #1

Download Thales.keygenme.#1.by.BUBlic.zip, 123 kb (password: crackmes.de)
Browse contents of Thales.keygenme.#1.by.BUBlic.zip

It's my first keygenme and i tried to use a clear algo.
Find a correct serial or even write a keygen for this one.
For more info read the rules inside.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 12. Feb, 2006
Downloads: 827

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Kerberos, published 13. feb, 2006; download (157 kb), password: crackmes.de or browse.

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Discussion and comments

l0calh0st 12. Feb 2006	Serial is 23h long..including "-" Thanks Bublic...i m learning :)
Kerberos 12. Feb 2006	Yes and serial check is based on math (FPU instruction) :)
jB_ 13. Feb 2006	Nice crackme for those who want to start with FPU =) The algo is well thought, congrats.
BUBlic Author 13. Feb 2006	When you like it very much, then vote ;)
BUBlic Author 13. Feb 2006	Kerberos wrote a very nice math solution for my keygenme. But indeed it is based on a geometrical problem then you don't need any big equations to solve but just to ask your friend thales ;) Maybe someone discovers that problem and describes the geometrical way.
Kerberos 13. Feb 2006	BUBlic: My equations used keygen aren't big.... I've writted keygen for your second KeyGenMe and there are really big equations :)) ... but I'll try to use your hints and find easier way. Thx for this KeyGenMes ... they're really nice.

BUBlic's Thales keygenme #2

Download Thales.keygenme.#2.by.BUBlic.zip, 135 kb (password: crackmes.de)
Browse contents of Thales.keygenme.#2.by.BUBlic.zip

Welcome to my second keygenme - a half dimension bigger than the first one.
For more info read the rules.
If you cant solve this try my first - maybe then you understand it.

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: C/C++

Published: 13. Feb, 2006
Downloads: 900

Rating

Waiting for at least 3 votes
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Solutions

Solution by Kerberos, published 16. feb, 2006; download (156 kb), password: crackmes.de or browse.

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BUBlic's Xor 2 Zero

Download Xor_2_Zero_KeygenMe_by_BUBlic.zip, 34 kb (password: crackmes.de)
Browse contents of Xor_2_Zero_KeygenMe_by_BUBlic.zip

I think this one is gonna entertain everyone, who likes keygenning and clean algorithms. No packer/protector, so you understand the routine in a few minutes.

The difficult task is writing a keygen, which:
-doesn't bruteforce
-only uses XOR and AND in his main part (except hash)
-fast/memory efficient (if the problem would be larger)

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 15. Jun, 2007
Downloads: 626

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by andrewl.us, published 15. jan, 2009; download (39 kb), password: crackmes.de or browse.

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Discussion and comments

hound 16. Jun 2007	hmm, just got to figure out how to go backwards..... pretty fun though, nice and simple algo, just got to work it out :).
BUBlic Author 05. Jul 2007	maybe it's more difficult for you than I thought. I give you two "hints". 1. if two bits are equal the XOR of them is always ZERO. 2. the serial is shifted so one bit doesn't change.
hound 17. Jan 2009	Fantastic solution! I was just starting to have a look at this keygen again :)

buga0205's Code Linux

Download CodeLinux.zip, 686 kb (password: crackmes.de)
Browse contents of CodeLinux.zip

You need to get Code if u want to join Code Linux!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 12. Jul, 2016
Downloads: 123

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Solutions

Solution by acruel, published 12. jul, 2016; download (846 b), password: crackmes.de or browse.

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Discussion and comments

blackroserion 23. Aug, 21:33	i enjoyed it :)

BuKoBG's KeyFileMe #1

Download keyfileme.zip, 704 b (password: crackmes.de)
Browse contents of keyfileme.zip

No patching.Craft a *special* keyfile that shows good boy message.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 07. Feb, 2011
Downloads: 355

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by draww, published 11. feb, 2011; download (2 kb), password: crackmes.de or browse.

draww has rated this crackme as boring.

Solution by sphaaz, published 11. feb, 2011; download (3 kb), password: crackmes.de or browse.

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Solution by -Alex-, published 11. feb, 2011; download (2 kb), password: crackmes.de or browse.

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Solution by promix17, published 11. feb, 2011; download (2 kb), password: crackmes.de or browse.

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Solution by Klaria, published 11. feb, 2011; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

Andersen 08. Feb 2011	Did this crackme has solution? The code is simple, but GetTickCount returns differ values everytime, and this value compared with first DWORD bytes of keyfile. Oo Anywhere, my Ollydebugger crashed in 40106D. So, I thougth-no way
Andersen 08. Feb 2011	Hmm... Seems, retn instruction do not knows address where return. Is it trick? Where is my IDA Pro+SoftIce? (=
Andersen 08. Feb 2011	so, may be something I am do not know? Please, write the solution, anyone
Zephy 08. Feb 2011	nice pure code, ...but solution is not so nice :-)))
promix17 08. Feb 2011	Hm... I think, that solution is the buffer overflov... Wait a minute...
maverick` 08. Feb 2011	you are right...
promix17 08. Feb 2011	I solved it wait a tutorial!
Andersen 09. Feb 2011	Roger, here need overflow, but how? I thougth, first dword of keyfile is not so important, it's not matched with GetTickCount()'s return. But another part of the keyfile filled the stack.
Xspider 09. Feb 2011	i'm wondering where is that special key :p
Xspider 09. Feb 2011	ok i give up it's a BoF!!!!!!!!!
sphaaz 09. Feb 2011	actually it simple i wrote a tut w8ing for approval :) just push the values for messgebox onto the stack and jump to call MessageBoxA :)

BuKoBG's KeyGenMe #1

Download KeyGenMe.zip, 2 kb (password: crackmes.de)
Browse contents of KeyGenMe.zip

Hi people, I hope you have fun with this one :). PM me if something.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 14. May, 2010
Downloads: 361

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by Envy, published 25. may, 2010; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

Falo 14. May 2010	easy KeygenMe, but there is a problem, after the serial checking is this here: 0040121B B8 00000000 MOV EAX,0 00401220 C3 RETN 0040114E C3 RETN 00401345 83F8 01 CMP EAX,1 00401348 75 16 JNZ SHORT KeyGenMe.00401360 0040134A 6A 00 PUSH 0 0040134C 68 84304000 PUSH KeyGenMe.00403084 ; ASCII "Correct" 00401351 68 8C304000 PUSH KeyGenMe.0040308C ; ASCII "Correct serial, good job !" this cannot work, MOV EAX, 0 and then CMP EAX, 1 ? the goal EAX = 1 cannot be reached through a correct serial or do i miss something ? if not this KeygenMe is not possible without patching
BuKoBG Author 14. May 2010	Falo, you are missing something :)
andrewl.us Moderator 15. May 2010	looks like a good one; no more posted clues, please
tomkol 15. May 2010	Quite nice one. There's no problem meeting given requirements. All you need is to look a bit closer what crackme is doing. And everything is reversible.
tomkol 15. May 2010	It was nice and simple keygenme. Short solution submitted.
CronuX 15. May 2010	I too solution submitted, and and I had fun doing keygen, was excellent you very much thank My keygen is coded in VB.NET CronuX
rutio 16. May 2010	Was it solved without bruteforcing the serial until the CRC matches? I can only reverse CRC by using non-ASCII characters.
tomkol 16. May 2010	Yes. You don't need to bruteforce crc. You can reverse it. Serial will be non-ASCII but who cares if it works.
rutio 19. May 2010	What if a '\0' character comes up?
BoRoV 25. May 2010	@Envy: good solution, but I have one question, your function <hash>, you really do not know what that CRC ?
Envy 28. May 2010	At the time of the writing I did not, but after reading these comments and a little research, it's quite obvious :P
fireblast 01. Jun 2010	Nice little keygenme. Searching for the magic number get to the needed algorithm :) . Only way I found to get a serial is to bruteforce it (1000 first numbers here but should be enough). For the one interested, here is my keygen : http://pastebin.com/EPhU5wDX

BuKoBG's KeyGenMe #2

Download crackme2.zip, 33 kb (password: crackmes.de)
Browse contents of crackme2.zip

Well guys, that's my 2nd crackme, enjoy it.

There are some anti debugging code inside this crackme
No patching, write a keygen and submit it at crackmes.de

Have fun :)

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 19. May, 2010
Downloads: 355

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by BoRoV, published 23. may, 2010; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

BoRoV 23. May 2010	I submit my solution )
Xspider 23. May 2010	nice one BoRoV :) didn't know you are coding in cpp too :p what a Coincidence i entered 'xspiderr' as a name and the serial was '15030' if we remove the last zero it will look like my birthday 15/03/1990 xD

BuLLeT's Crackme 1.75

Download tol_b175.zip, 62 kb (password: crackmes.de)
Browse contents of tol_b175.zip

Name / Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Oct, 2002
Downloads: 1827

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Solutions

Solution by zhackerteam, published 09. nov, 2002; download (379 b), password: crackmes.de or browse.

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Solution by Scooby D0o, published 11. oct, 2002; download (652 b), password: crackmes.de or browse.

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BuLLeT's Crackme 2.75

Download tol_b275.zip, 7 kb (password: crackmes.de)
Browse contents of tol_b275.zip

Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Oct, 2002
Downloads: 1578

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Solutions

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Solutions

Solution by eraser, published 13. aug, 2009; download (17 kb), password: crackmes.de or browse.

eraser has rated this crackme as quite nice.

Discussion and comments

bundy Author 27. Apr 2007	Hmm, almost two months after posting and no response yet. Maybe my protector (or chosen tricks) is too difficult ?! (which would be really a surprise ;) ) To help you a little further I give you OEP RVA: 0000310B. As I said ... no anti-attach .. so give it a try.
Kostya 18. Sep 2007	It`s not so hard to unpack this about 5 minutes... But it is really hard to keygen it.. Hm.. The algo is really huge... Have no ideas :/
Kostya 19. Sep 2007	Here is the tutorial on how to unpack it: http://blognow.com.au/kostya/73592/Unpacking_the_bundy039s_keygenme_2.html There are 3 filez: pdf, unacpked & plugin for Olly..
bundy Author 21. Sep 2007	I never wrote it would be easy ;) Here's another hint: Don't concentrate on the first calculations. Have a look at the serial format verification and the conditions which needs to be fulfilled to have a correct serial. There's a mathematical relation between these numbers.
bundy Author 24. Feb 2009	The previous note (deleted) contained an outdated link to my protector. Here's a new upload (still the same file): http://rapidshare.com/files/202050185/buc04.zip In case you have any comments/suggestions/bug reports regarding my protector send me a PM or post a topic in forum. Anything similar found here will be removed from this page, as it doesn't have anything to do with the keygenme itself.
eraser 21. Jul 2009	Hi bundy, your keygenme is not a trivial math problem. But this keygenme is finally solved. As a proof here is the 7z content: [kgme2kg_src] [kgme2_src] We have also a tutorial (in SK language). If you want it we can submit it here or send it to you privately. Let us know. Thx. Btw. you can find the right key in the memory, is it a bug or was it an intention? eraser & goober
andrewl.us Moderator 21. Jul 2009	eraser: is there no chance for translation? we would love to have the solution posted! :)
bundy Author 28. Jul 2009	Hi eraser, finally someone! It would be great if you could submit it here too. I'm quite sure the rest of the people will be glad to see the description. About the right key in the memory - there was no other way to validate the correct serial (the correct serial was the optimal solution to the ... problem calculated by means of ...). I leave it blank for now ;)
Numernia Moderator 30. Jul 2009	This keygenme is very interesting, I have tried solving it for some time but with no success. Would be interesting to see your solution eraser & goober. Thank you
simonzack Moderator 01. Aug 2009	yeah, me too however I found a bug(?) in this: negative numbers are allowed, e.g. -4294967295- however this would generate infinite pass I have not figured out what the second proc does does this involve any maths in abstract algebra, etc.? I just like to know, cause if it does, I have not enough maths knowledge to solve it :p
bundy Author 01. Aug 2009	I've had a look on the parsing serial method once again (after all these years ;) and it might be that there could be problem with parsing of negative values. However, as I see it, it shouldn't affect anything. And you shouldn't be able to exploit that to get a valid serial. But you're welcome to proof me wrong ;) Nope, there is no abstract algebra present. Just addition and multiplication (and division and subtraction in the helper method). Modulo was used just to truncate the variables to not overflow in the later multiplications.
eraser 13. Aug 2009	The solution was uploaded... enjoy.
andrewl.us Moderator 13. Aug 2009	approved, solution is somewhat meager, will let bundy decide if it is satisfactory
bundy Author 13. Aug 2009	First of all thanks to eraser & goober for a solution. Everyone could have a look inside the archive with the provided key to see what exactly was going on. The main problem presented with this keygenme was to solve transportation problem. There are 4 customers (with theirs demands on goods) and 5 supply depots (providing them). Between each of them there is a path and the transportation cost on that path per one item. The problem is in minimizing costs and/or maximizing profit. The first number of the serial was the optimal solution, following with number of goods moved from depots to customers. In general any transportation problem has multiple solutions, but only few of the are optimal. To have unique serial I had to calculate the optimal solution. In general such transportation are calculated with some optimization algorithms such as simplex (remember the hint from description - "simple?" tricks :) ). The obvious problem for me was how to decoy the calculation of the simplex. If I would use just a simple simplex - the solution would be provided really quickly as the validation would directly calculate the results. My approach was to create a dual problem to the original problem and calculate the optimum with dual simplex. The calculation was used just to get the optimum value (the first part of the serial). The generation of the problem guaranteed that there would always be a solution and it would be integers only. I assumed that people would don't really care about the huge calculations and just concentrate on the serial validation. There were just 10 equations to solve ;) According to solvers the right key can be found in memory. Well, it was just side effect :(. If you would just have looked on the outcome of the dual simplex, you wouldn't see them. Unfortunately, they are probably part of the immediate matrices used in calculation (if I only could have made that as a black box :) ). If you would have the results of the dual simplex, you could still calculate complementary variables to get the optimal solution of the original problem. There are more optimization problems besides transportation problem and I might have look on them again to write another interesting (I hope) keygenme as this one has been defeated.
br0ken 14. Aug 2009	wow, transportation problem in a kgme! what next? travelling salesman? assignment problem? nice :D

BunnX's colors crackme

Download bunnxcolors.zip, 174 kb (password: crackmes.de)
Browse contents of bunnxcolors.zip

colors crackme
==========

I bet, you have never solve a crackme like this. Ok, it's not hard but some kind of unique I belive.

Rules:
- Understand the key algo.
- After this, crack the program, without make any changes at the exe. (Yes, it's possible)
- Write some sentences about you have done and put in some keys, too. You don't need to make a Keygen for this shitty algorithm.

I think, if you be attentively, then you can do it easily.

Have fun.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 03. Jun, 2013
Downloads: 300

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Solutions

Solution by redoC, published 20. oct, 2016; download (46 kb), password: crackmes.de or browse.

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Discussion and comments

BunnX's getacces Crackme (Password)

Download getaccess.zip, 16 kb (password: crackmes.de)
Browse contents of getaccess.zip

getaccess crackme
============

# Try to get the right password.
# Patching is allowed for the cracking process but not the solution!
# Write a tutorial how you have done.

The accepted solution is the real password.
(Try to imaginate, that you want to use this password for other purposes, too.)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 07. Apr, 2013
Downloads: 165

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Bargest, published 12. nov, 2013; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

iSSoGoo 07. Apr 2013	I actually don't know what you mean with "Password is correct with a probability of 256", because the "XOR ECX,00000012" in 00401567 tests if the resulting checksum is equal to 12h. I wrote a simple program which bruteforces every combination and there are a lot more than 256! Probably a few billion! Here are some: 6?zbui\|hC8^j 5<zbui\|hC8^j 4=zbui\|hC8^j 3:zbui\|hC8^j 2;zbui\|hC8^j 18zbui\|hC8^j 09zbui\|hC8^j /&zbui\|hC8^j .'zbui\|hC8^j -$zbui\|hC8^j ,%zbui\|hC8^j +"zbui\|hC8^j *#zbui\|hC8^j ) zbui\|hC8^j (!zbui\|hC8^j '.zbui\|hC8^j The code which is calculated from the password is probably a CALL or JMP, but I don't have a clue so far why you would need 12 bytes ;)
BunnX Author 07. Apr 2013	Hm, I won't disclose to much. Yes, the xor Check is only one Byte long, so every 256th password "could" be correct. This is only a check, cause the wrong password can crash the program and not the check whether it is the right password. You will see if you patch this. If you enter the right, you will get automatically the success message. If it's wrong and the xor is disabled, i'm really sure.. the programm will crash. Ah, this was to much. :/ Greetings :D
BunnX Author 07. Apr 2013	"The code which is calculated from the password is probably a CALL or JMP, but I don't have a clue so far why you would need 12 bytes ;)" ^^Have Read this to late, why I'm explaining... ;)

BunnX's Good game

Download callenge.zip, 17 kb (password: crackmes.de)
Browse contents of callenge.zip

Make a no CD Crack.
Try to run the Exe without the cdrom_drive folder.
It should appear "Good Game".
Patching is allowed (or the only way).

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 26. Mar, 2013
Downloads: 392

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by Joeri, published 26. may, 2013; download (1 kb), password: crackmes.de or browse.

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Solution by stejkenzie, published 05. may, 2013; download (18 kb), password: crackmes.de or browse.

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Solution by iSSoGoo, published 08. apr, 2013; download (22 kb), password: crackmes.de or browse.

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Discussion and comments

iSSoGoo 26. Mar 2013	Ok, cracking done. Is there any use for the "gamedata.pk" and "setup_dummy.exe" files that I haven't figured out yet?
BunnX Author 26. Mar 2013	Good :) I am curious about the solution. No, this files are only for better imagination, that the folder should be a CD.
hPl0w 06. Apr 2013	I think I did well PATH, but hangs forever.
jhon 07. Apr 2013	Cracking ok. regards ;D
BunnX Author 09. Apr 2013	@iSSoGoo Thank you for the great tutorial! @hPl0w Hm, i don't know.. But, to integrate the file would be more clean.
Joeri 15. May 2013	This was my first "crackme" assignment. It was a lot of fun to do and I hope my solution could be useful to other people out there. Thank you BunnX for the great puzzle. Cheers, Joeri

BunnX's Hexeditor Keygenme

Download hexeditorCrackme.zip, 49 kb (password: crackmes.de)
Browse contents of hexeditorCrackme.zip

Target:
Try to get valid serial/name combinations and write a keygen.
========================================

May you can crack it?! I really believe you can't until you haven't a right serial and there is only one way, one hard way (i think/hope).
If not, clarify me :)
But anyways, to not stir up any mess: Keygen -> solved!

The really special thing on this crackme is, its a fully functionable program. I thought it would be more "dramatical" and maybe useful, too.
If you crack, you can get!

For explanation, it's a hexeditor. The 'standart'-version can't save edited files. But when you enter a valid serial, it can.

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: C/C++

Published: 07. Apr, 2013
Downloads: 212

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Solutions

Solution by _hog, published 24. sep, 2013; download (31 kb), password: crackmes.de or browse.

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Discussion and comments

BunnX
Author
09. Apr 2013

I got an idea, i belive that this crackme can be really bothering to you. I don't know how hard it is.. but I know the scenario is quite unrealistic, cause without a serial or "fullversion" it's really "challenging".. With a fullversion, it can be cracked until 20 minutes.
So I think it's not a great protection but really unfair to you.

So my idea is, i can upload a registered fullversion of the hexeditor, so you can get it easier.

But it's only an idea, let me know what you wan't! ;)

BunnX
Author
26. May 2013

Hey, the "upload idea" is obsolete! Someone got it without this stuff. Ok, cheers.

BunnX's Online terminal Patchme

Download onlineTerminalPatchme.zip, 31 kb (password: crackmes.de)
Browse contents of onlineTerminalPatchme.zip

Hello,

Alert:
This crackme needs a internet connection and will download programcode from the net.
You can't see this code in the compiled EXE, so it's your chooise to trust me or not.
I assure you that it's no virus.

Your task:
Try to imaginate that you are an employee of a company, you start your program that you got from your employer.
At first, you will need an account. For this write a message to me (http://crackmes.de/users/bunnx/) and
I will send you your login data.
Or for thoose who are to serios for playing childish games use noname:nopassword and don't get in the online employees list :(

Now you should be able to receive your messages in the program, read them to get your target.

I will write here what to do, too:
- Patch the whole program to a offline version.
- Includes that the messaging /employees list functionality is pachted out, too.
- The patch should avoid every contact with the webserver.
- The patched program should contain the menu and all dummy functions. (You will see what that is meaning.)

All this stuff is explained in the crackme, too.

bunnX :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 15. Aug, 2013
Downloads: 116

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Discussion and comments

BunnX's wizzard Crackme

Download wizzardCrackme.zip, 125 kb (password: crackmes.de)
Browse contents of wizzardCrackme.zip

wizzard Crackme
===========

This crackme is protected by a keyfile.
Have you found one valid, you will see a little demo scene. I tried to make it a little 'retro'.

So do it. After you reproduce the checking algorithm, write the counterpart as a nice keygen.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 11. Jun, 2013
Downloads: 316

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by iSSoGoo, published 18. jun, 2013; download (58 kb), password: crackmes.de or browse.

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Solution by neo85, published 18. jun, 2013; download (162 kb), password: crackmes.de or browse.

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Send a message to buzz'm frog scusi! »

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Discussion and comments

korsader 13. Jun 2013	The crackme has a unique solution, or there may be many? I found only one correct value
BunnX Author 13. Jun 2013	Do you mean one correct key? No, there are many. I wrote a keygen :)
BunnX Author 13. Jun 2013	You can send me a pm, I want to know what value you have found.
neo85 14. Jun 2013	Nice demo scene, I'm writing the solution for this crackme :)
BunnX Author 14. Jun 2013	@neo85 Thank you :) Because I got some pm's, I will clarify something for all who are trying it/ will try it.. There a more serials than one. This single hash value, is the one from a empty string. I only forget to check the length of the second serial section. The right solution have to create a keyfile with a random string or of a inputted name. So it can produce many keys. I'm sorry about that ambiguity.
B@zz! 16. Jun 2013	I've found the key pattern. I think my first part is correct but the second is wrong... 75EF0226-ªªªªªªªªªªªªªªªª I think i need some time for the second part.. and myeb it's something like: c_data_f => first part c_data_s => second part void encrypt_first_part(char* c_data_f, char* c_data_s) { BYTE* b_data_f = (BYTE)c_data_f; BYTE b_data_s = (BYTE*)c_data_s; int i = 0; int len = strlen(c_data); bool b_check = false; while(i <= len) { b_data_f[i] ^= c_data_s[i]; if(b_data_f[i]) b_check = true; i++; } } Maybe i'm totally wrong then i'm sorry.
zaawrt 16. Jun 2013	i've done the key file, take a look
BunnX Author 16. Jun 2013	@B@zz! more wrong, sry. @zaawrt I don't know how to grasp your comment. There is not 'the' key file. You should make a gen that's able to produce many different key files. The solution with this 8 Byte Hex string isn't the expected. Maybe I misinterpreted this, you can send me a pm and I will check it.
BunnX Author 16. Jun 2013	Btw, I know it's working this way and so it can be cracked easily. It was my failure that it's not checking the second string for the length. But the challenge is still a keygen for random keys. :\
BunnX Author 19. Jun 2013	Thanks to neo85 and iSSoGoo for the nice solutions. It's everytime fun to see how people crack my "mind stuff" and good for improving my own skills.

buzz'm frog scusi!'s buzzem crackme

Download buzzemfrog_crk.zip, 288 kb (password: crackmes.de)
Browse contents of buzzemfrog_crk.zip

4 crackmes (2 in c++ and 2 in vb), all n...

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 18. Apr, 2001
Downloads: 2660

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Solutions

Send a message to BytePtr »

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Solutions

Solution by bLaCk-eye, published 11. jun, 2004; download (21 kb), password: crackmes.de or browse.

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Solution by kao, published 05. dec, 2003; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

BytePtr's KeyGen-Me #1

Download byteptr_kgme1.zip, 58 kb (password: crackmes.de)
Browse contents of byteptr_kgme1.zip

KeyGen-Me #1

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Aug, 2003
Downloads: 2204

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Solutions

Solution by Plasmator, published 28. apr, 2004; download (64 kb), password: crackmes.de or browse.

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Solution by CuTedEvil, published 01. sep, 2003; download (9 kb), password: crackmes.de or browse.

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Solution by m@rio_crk, published 31. aug, 2003; download (6 kb), password: crackmes.de or browse.

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Send a message to c00lw0lf »

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Discussion and comments

etiennekraemer 25. Apr 2009	Can someone send the source code of keygen because I see perfectly the routine but I don't understand. Thanx

c00lw0lf's c00lw0lf's KeygenMe1

Download keygenme.zip, 29 kb (password: crackmes.de)
Browse contents of keygenme.zip

very simple one, RSA used

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 03. Mar, 2004
Downloads: 1565

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Solutions

Solution by Encrypto, published 22. mar, 2008; download (54 kb), password: crackmes.de or browse.

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Solution by bigbang, published 27. mar, 2004; download (88 kb), password: crackmes.de or browse.

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Solution by BadSector, published 04. mar, 2004; download (27 kb), password: crackmes.de or browse.

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Discussion and comments

c0nfig Author 17. Jun 2009	Good Luck with this one... Winners will be awarded with medals. ========================= You also may try my crackme : http://crackmes.de/users/c0nfig/hshell_secret_of_the_matrix/
cobrasniper555 18. Jun 2009	Medals? Explain.
c0nfig Author 18. Jun 2009	;) Image of Medal (.jpg...etc) for your name... sorry for my english, don't know how to say: (Russian: "Именная медаль")
c0nfig Author 18. Jun 2009	http://s53.radikal.ru/i141/0906/6a/670197dd2901.jpg Something like this... Gold medal :)
andrewl.us Moderator 18. Jun 2009	"Example. Demo metal (not cracked yet). Example. Demo metal (not cracked yet). Example. Demo metal (not cracked yet). Example. Demo metal (not cracked yet)." hahah
c0nfig Author 18. Jun 2009	andrewl.us, don't laught :) Nice medal)) (own work)

c0nfig's hShell : Secret of the Matrix

Download hShell.zip, 56 kb (password: crackmes.de)
Browse contents of hShell.zip

================
Special type of crackme.
You don't need to disasm it ;) But if you want it allow.
Target : Find superuser password & login.
================
Hint: Secret number 0066
================
Password hardcoded is app, but md5 crypted.
Only hash-image can help you.
Patching allowed.
==================
-C0n[F1]G.inf /bin | Russia-
==================

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 08. Jun, 2009
Downloads: 410

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Rain [Cls], published 23. feb, 2012; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

c0nfig Author 09. Jun 2009	:) Good Luck, might you like it
c0nfig Author 13. Jun 2009	Note: Your misson not to find "admin password", find "root password" plz.
DigitalAcid 15. Jun 2009	Ok, so I thought I found the root password, but you said it was the Remote root password. The only thing i see and can think of now is that you want us to bruteforce the unbruteforcable =).
c0nfig Author 16. Jun 2009	Bruteforce allowed... But Time of brute ~~10years. Pass Hardcoded In MD5 in App... Only brainZ can help you, if u want hints contact me on icq/4799729 ================= u found "Password to ENABLE root account" But didn't find "Root Password"
DigitalAcid 16. Jun 2009	Only the first 3 bytes (24 bits) of the hash are shown, even if we patch it, we don't get the rest of the hash...
c0nfig Author 17. Jun 2009	ohh... 67ee4dc266454499eed845bb38bfea5 dfd34512018c7b389574f0f04e88a43e 44b1965bbd142179c03de02586e158bd 000020013373r001500m21n000g00822 2b56db3d2e95992af18fc5b401b411b 96310655285b6418a13deffe3d0678cf c893a03fd09d31c7fec6a94563f27847 cc68cd0025082fc28e57404000500000 001337001500d1aa00do001625b59ec e86405a1434670c2776013e55983edbc a900661a570011ne000000b6b5134050 90066f1r57w0rd0cd03e506507fcc734 90066fe570070eee0404702c5f880b9 60006657ar766000000000244e644411 352e9cada4572f34d6a4bb0fb5d65ea0 762072e1a08da6851d22cf40add00_sZ In this hashes stored root password.... Just open you eyes. Hint: Place where you should start is marked as Next 5 chars = 57ar7 ... 5-S 7-T = Start Now work :) I said enought.
c0nfig Author 17. Jun 2009	p.s. I have already say: "You don't need to disasm it ;)" This it logic crackme.
DigitalAcid 17. Jun 2009	Ah, now you probably gave a biiiiig hint =). I'll take another look at it.
c0nfig Author 17. Jun 2009	>> New crackme : http://crackmes.de/users/c0nfig/brainhack/
c0nfig Author 19. Jun 2009	up^^ DigitalAcid , i wait for your solution ;)
DigitalAcid 20. Jun 2009	Well, i kinda gave up =).
c0nfig Author 20. Jun 2009	Don't give up please)

cad's crackme #1

Download cad_crackme1.zip, 1 kb (password: crackmes.de)
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serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 16. Apr, 2002
Downloads: 2363

Rating

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Solutions

Solution by bRaiN_faKKer, published 08. oct, 2002; download (1 kb), password: crackmes.de or browse.

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Solution by Cipher, published 28. jul, 2002; download (2 kb), password: crackmes.de or browse.

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Solution by code_inside, published 28. jul, 2002; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

camed's Reverse Me!

Download Reverse_Me!.zip, 87 kb (password: crackmes.de)
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7-part series of my own very first crack me - designed for beginners.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 09. Feb, 2016
Downloads: 1359

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by ph34zcr4ck, published 12. jul, 2016; download (6 kb), password: crackmes.de or browse.

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Solution by SoN, published 12. jul, 2016; download (6 kb), password: crackmes.de or browse.

SoN has rated this crackme as quite nice.

Solution by aldeid, published 29. feb, 2016; download (480 kb), password: crackmes.de or browse.

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Discussion and comments

SoN 29. Jan, 18:57	#4 is returning a 404 so I am thinking it is broken. Just wanted to know for sure.
camed Author 30. Jan, 13:35	@Son thanks for info, so hosting expired. Will be fixed :)
SoN 30. Jan, 13:47	Glad to hear it. I didn't want to submit an incomplete solution.
SoN 10. Feb, 19:09	I see you changed it to SSL. That made it harder.
camed Author 14. Feb, 11:59	a bit, but not much
aldeid 14. Feb, 13:12	Solution submitted. Nice challenges! @Camed: Thank you!
camed Author 14. Feb, 13:54	Thank you, I hope you enjoyed them @aldeid :)
camed Author 02. Mar, 16:46	@aldeid, You are awesome! All's good, as it should be.
givses 30. Apr, 17:10	At crackme no 3. If (Me.getMD5(Me.textBox1.Text) = "22DB96BB26EEAF15E68B828A1361C132") Then MessageBox.Show("Correct password!", "Great job!") Else MessageBox.Show("Incorrect password.", "Sorry") End If What should we do? Bruteforce the MD5 or guess?
rentf 08. May, 12:43	Crackme no 1. #include <windows.h> #include <stdio.h> int main(int argc, char* argv[]){ if(argc!=2){ printf("Usage: [program] [password]"); return 0; } if (!strcmp(argv[1], "f4h9b")) MessageBoxA(NULL, "Correct! You passed first challenge!", "Congratulations!", MB_OK); else MessageBoxA(NULL, "Incorrect password \| Enter Correct Password!", "Wrong Password", MB_OK); }
camed Author 08. May, 18:37	@givses you ought to bruteforce this (it will take up to 10-20seconds) @rentf what's wrong with that?
akhilchalla14@gmail.com 03. Jun, 19:55	It says all the programs are not a valid win32 application i am having errors i am opening these programs in windows xp is it working for everyone?
[...............] 23. Jun, 17:46	Hello I am a total begginer to this stuff. I downloaded the files but they are asking for a password and I don't know what password they want...
Flashini 11. Jul, 10:17	Oh it wasn't meant to be decompiled, modified and compiled again xD?
_spartax_ 14. Oct, 06:48	CrackMe #3 : if md5(textBox1.Text).hashdigest() == '22DB96BB26EEAF15E68B828A1361C132': print 'Correct' else: print 'Incorrect'

caos1986's NesLevel1

Download NesLevel1.zip, 971 b (password: crackmes.de)
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This crackme consist of a NES rom where you need to input a 4 digits number, the correct number gives you the flag.

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Assembler

Published: 26. Jul, 2015
Downloads: 97

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by Coderess, published 12. aug, 2015; download (153 kb), password: crackmes.de or browse.

Coderess has rated this crackme as quite nice.

Solution by acruel, published 29. jul, 2015; download (932 b), password: crackmes.de or browse.

acruel has rated this crackme as quite nice.

Solution by deurus, published 29. jul, 2015; download (5 kb), password: crackmes.de or browse.

deurus has rated this crackme as quite nice.

Solution by klefz, published 29. jul, 2015; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

deurus 28. Jul 2015	Are you Nessie? Very nice Caos1986.
acruel 28. Jul 2015	My first NES reversing. It was really Nessie!
Coderess 29. Jul 2015	I'm too solve this old-school crackme. NES/Dendi it's miracle :)
Don Toro 08. Nov 2015	I loved this one, Nessie

CarlosD's ManagedCD

Download MANAGEDCD.zip, 393 kb (password: crackmes.de)
Browse contents of MANAGEDCD.zip

Simple crackme with some protections.. so easy

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 03. Jul, 2013
Downloads: 200

Rating

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Solutions

Solution by iSSoGoo, published 16. jul, 2013; download (56 kb), password: crackmes.de or browse.

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Discussion and comments

iSSoGoo 04. Jul 2013	I believe you forgot to clear the buffer. When I enter a username with less than seven chars I can't calculate a serial, because there is some garbage left. At least it seams as if seven is the 'magic threshold'. For example: iSSoGoo 43050150 works for me test 12607168 does not work, although I'm sure my algo is corect.
CarlosD Author 04. Jul 2013	u r right ... test 12607168, and others usernames does not work by thread concurrency errors in the VCL.. but that's the serial... congratulations, now keygen it

cauchy_htb's KeygenMe #1

Download cauchy_keygenme1.zip, 9 kb (password: crackmes.de)
Browse contents of cauchy_keygenme1.zip

A little crypto + need to patch ONE byte, should be no problem, but definetly not for newbies ;]

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 27. Jan, 2005
Downloads: 591

Rating

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Discussion and comments

Bauer Bimpf
09. Aug 2005

This keygenme is faulty and should be removed or fixed by the author. At 401353, ESI is pointing at the user name. There will be garbage after that string on all executions after the first execution, because the buffer is not zero_init'ed. That garbage affects calculation for all names that do not end on a dword boundary, ie. (namelength MOD 4 != 0).
Guys, get your keygenmes right! Such errors can piss people off, good that I noticed it early on!

cauchy_htb's KeygenMe #2

Download cauchy_keygenme2.zip, 64 kb (password: crackmes.de)
Browse contents of cauchy_keygenme2.zip

Welcome in my second keygenme, this time without crytpo thing but with one cute math equation. need a brain and math knowledge. if you don\'t like math, don\'t even down it ;]

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 27. Jan, 2005
Downloads: 784

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to Celtic »

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Discussion and comments

Knight 12. Jul 2005	Did somebody managed to find this ones serial checking routine? If yes, then how?
m@rio_crk 12. Jul 2005	ask jB! ;) he solved this one
jB_ 12. Jul 2005	You can check my solution here: http://jardinezchezjb.free.fr/Keygens/cauchy-keygenme2.zip Some explanations are given in code.c Mail me if you can't understant something (janbaptiste@hotmail.com)
Knight 13. Jul 2005	Know i know what's wrong. If you compare crackme downloaded from this site and the one included with keygen you would see that they are not the same. Acctually the one on this site is missing whole key checking function (it is but it's empty).

Celtic's Exploitme 1#

Download exploitme.zip, 106 kb (password: crackmes.de)
Browse contents of exploitme.zip

Hello Freaks.
I have post my old Exploitme I hope you like it!

Your Missions are: To code a Exploit to jmp to the Secret Place of the Goodboy Msg :)

Have fun, Celtic

Ps:Sorry for my bad English :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 18. Sep, 2008
Downloads: 621

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Ramirez, published 21. sep, 2008; download (238 kb), password: crackmes.de or browse.

Ramirez has rated this crackme as nothing special.

Solution by rex922, published 21. sep, 2008; download (2049 kb), password: crackmes.de or browse.

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Discussion and comments

yomshleeshee 24. Sep 2008	Any recommended reads/explainations on the VirtualProtect used here?
T[9]Uvatha 24. Sep 2008	The VirtualProtect function changes the access protection on a region of committed pages in the virtual address space of the calling process. This function differs from VirtualProtectEx, which changes the access protection of any process. BOOL VirtualProtect( LPVOID lpAddress, // address of region of committed pages DWORD dwSize, // size of the region DWORD flNewProtect, // desired access protection PDWORD lpflOldProtect // address of variable to get old protection ); It's basically to enable "writing" to some place... that should leave you on the good way to solve this. (Hint Hint lpAddress Hint Hint)
yomshleeshee 24. Sep 2008	Is it read only by default? Or did he change that somewhere?
simonzack Moderator 25. Sep 2008	@yomshleeshee: check the section in lordpe
glery 26. Sep 2008	How to get the secret place, for example 0x4011c0?
Ramirez 26. Sep 2008	Look at rules - no rules .. do it as you can .-)

Celtic's Keygenme 7

Download KGMe7.zip, 73 kb (password: crackmes.de)
Browse contents of KGMe7.zip

Hi Freak's. This is one of my KeygenMe i hope it makes fun :)
It is 100% codet in asm.

Sorry for my bad english!!!

Greetz Celtic

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 01. Aug, 2008
Downloads: 1184

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by ARCHANGEL, published 13. aug, 2008; download (17 kb), password: crackmes.de or browse.

ARCHANGEL has rated this crackme as quite nice.

Solution by LAS3R, published 05. aug, 2008; download (13 kb), password: crackmes.de or browse.

LAS3R has rated this crackme as quite nice.

Solution by br0ken, published 09. aug, 2008; download (100 kb), password: crackmes.de or browse.

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Solution by obnoxious, published 09. aug, 2008; download (9 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

yewnix 30. Jul 2008	Application is crashing once you understand the Name needs be be => 5.. Crashes on 3rd loop. Maybe its just me shrugs
xylitol 01. Aug 2008	my Winzip 11.1 says: archive is damaged
ReDucTor 01. Aug 2008	its rar not zip..i cbf downloading an unrar program for this.
Celtic Author 01. Aug 2008	@ All this is the fixed version of my Programm. I Hope You like it :) Greetz Celtic
Mazrock 02. Aug 2008	Nice keygen me for newbies. Routine not hard to see and understand
br0ken 02. Aug 2008	SMC + Nice algo + FPU = awesome :)
LAS3R 04. Aug 2008	Intresting one, but it's keygened, just add a tutorial and i submit solution. :)

cerberus's keygen

Download Cerberus.zip, 10 kb (password: crackmes.de)
Browse contents of Cerberus.zip

This is my first keygen.
It's written in visual c++.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 08. Oct, 2010
Downloads: 1911

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by hasherezade, published 05. nov, 2010; download (591 kb), password: crackmes.de or browse.

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Discussion and comments

souravipc53 15. Oct 2010	nope at offset 1320 & its done. the algorithm is also there.
voila 17. Oct 2010	Hey there , i want to confirm one thing ... do you intentionally play with 4rth character of username ?? If yes then its fine ... otherwise there is variable overflow in crackme ..
cerberus Author 17. Oct 2010	Voila, I intentionally make the name with more than 4 characters
voila 17. Oct 2010	Cerberus: no not that ... i know u take username more than 4 chars i.e ... see this asm code of ur crack .. I use Ida Pro lea ecx, [esp+174h+username] push 32h ; cchMax push ecx ; lpString push 3E8h ; nIDDlgItem push edx ; hDlg call ds:GetDlgItemTextA Above code will take the username and put on the stack .. say username is .. aaabaaaa at address "esp + 174 + username " then after some more code, we have code xor edx, 890428h ; add esi, edx ; cmp ecx, 9 movsx edx, [esp+174h+var_159] ----> value of var_159 is not set anywhere (explicitly by programmer ) in the programm , still you can find string at address "esp + 174 + var_159" is "baaaa" ... it is the string from 4rth char of input username ...... I hope you understand what i meant to say .. well i m newbie here , and if i m wrong , correct me ..:) ... take care
hasherezade 28. Oct 2010	is self-keygenning accepted?
C0nqu3ror 19. Feb 2011	I patch 2 bytes = Any words fit and removed check on the number of characters in a name
Cooty125 11. Mar 2011	i can't make a keygen i don't know how offset? Cooty LNT-45272749--1825960472
XLHXLH 28. Apr 2014	Could you give me the source code for reference?
evaboy 12. May 2014	This a real, nice Keygen for beginners. More of this man.

ceycey's ceycey

Download ceycey.zip, 103 kb (password: crackmes.de)
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cpu games

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. May, 2001
Downloads: 2366

Rating

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ceycey's crackme

Download ceycey.zip, 167 kb (password: crackmes.de)
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serial, anti-si

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jun, 2000
Downloads: 2887

Rating

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Solutions

Solution by givses, published 09. sep, 2014; download (1 kb), password: crackmes.de or browse.

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Solution by bRaiN_faKKer, published 08. oct, 2002; download (1 kb), password: crackmes.de or browse.

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Solution by nitrus, published 11. jun, 2000; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

CHAAK's Keygenme #1

Download CKGM1a.zip, 45 kb (password: crackmes.de)
Browse contents of CKGM1a.zip

Find a valid serial and code a keygen.

Patching is not allowed.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 24. Jan, 2011
Downloads: 634

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by waganono, published 03. feb, 2011; download (175 kb), password: crackmes.de or browse.

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Discussion and comments

promix17 25. Jan 2011	Look like spagetti...
CHAAK Author 25. Jan 2011	Hello promix17, I tried to make it as easy as possible. The code might be a bit long but it's very easy to follow (once you identified the 5 functions and what they do). Would you prefer an optimized version ?
promix17 25. Jan 2011	I can't determinate what sub_401588 do... This is a key to solve this CrackME
HackMutant 26. Jan 2011	i might give it a try...
mm10121991 29. Jan 2011	example of valid Serial CKGM1AB-ABADABAD-ABADABAD-ABADABAD-ABADABAD
mm10121991 29. Jan 2011	I found 624 keys I will Try to write a tut.
lapak10 30. Jan 2011	Can You please tell me from where i can learn or i can get the tutorials to learn creating keygen and cracking code...i am new to this field and want to learn......
mm10121991 30. Jan 2011	search for lena151 tuts or ricardo narvaja tuts
CHAAK Author 30. Jan 2011	Congrat mm10121991! Did you like it?
lapak10 31. Jan 2011	@mm10121991 : Search where??? in this site??....or in google??? ........if you have the links for there tuts...please post it....it will be so kind of you......... :) Please......actually i tried on google....but getting only one or two tricks......and that also the basic ones.....
Wasted_Bytes 31. Jan 2011	Nice keygenme Chaak. Good job
Zephy 31. Jan 2011	lapak10: Type in google "ReVeRsInG by Lena151" and you find 40 video tutorials. Ricardo Narvaja wrote 58 tuts. Google it. Sorry about this OT. Thanks CHAAK for this crackme, I break a sweat on it :-)
lapak10 01. Feb 2011	@ Zephy : Thanks A LOT!!!!!!!......... :)
waganono 03. Feb 2011	A funny and thoughtful keygenme, great job chaak :)
CHAAK Author 03. Feb 2011	great waganono :) i think the upcoming "remix" will be crazy, I hope you'll enjoy it :)
lapak10 05. Feb 2011	Nice Work waganono!!! :D!!!!
Zephy 05. Feb 2011	Nice tut waganono, thnx! ....it was crazy crme :-)

chaise's crackmechaise1

Download crackmechaise1.zip, 7 kb (password: crackmes.de)
Browse contents of crackmechaise1.zip

This is my first keygen. I have problems to determine the degree of difficulty of this. This is written in c++ with CodeBlocks and DEV-c++.

Rules =

Find the rules for name
Find the serial
Make a keygenerator
Write a tutorial

Enjoy

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 04. Oct, 2007
Downloads: 748

Rating

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Solutions

Solution by alex_ls, published 05. oct, 2007; download (56 kb), password: crackmes.de or browse.

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Discussion and comments

Zaphod 30. Sep 2007	I made a keygen that worked fine - until the next day! So there is more work...
TiGa 30. Sep 2007	To everybody that ever got a self-keygen rejected for any crackme: Zaphod just explained why making a keygen is always better than a self-keygen. WARNING: It is more work but you could also learn stuff at the same time. ;)
Zaphod 30. Sep 2007	TiGa, you are absolutely right about learning things, but in this case a selfkeygen would work all the time. My keygen was in fact a 'regular' one, but it stopped working the next day because I discovered too late that the serial depends on the date.
ryan_cute142 01. Oct 2007	newbie thank for information ryan
alex_ls 01. Oct 2007	@chaise:Nice crackme! By the way, I wonder you don't like january? :(
chaise Author 01. Oct 2007	the serial depends of the date but how ?
alex_ls 02. Oct 2007	@chaise:I mean your crackme doesn't work in January (maybe I've missed something but I doubt it!) In February you don't use fpu floating operations! Well? I've assumed that you like better February than January:)) b.t.w. the solution has been submitted already
chaise Author 02. Oct 2007	alex Is Ok i have make a mistake for the first month of the year. I have forgotten a test
zairon Moderator 04. Oct 2007	New version uploaded.
chaise Author 04. Oct 2007	This version takes account of the remark of alex is.

chaise's crackmechaise2

Download crakme-chaise2.zip, 129 kb (password: crackmes.de)
Browse contents of crakme-chaise2.zip

This is my second keygen. I think that The difficulty is a little higher than for the first
This is written in c++ with CodeBlocks and DEV-c++.

Rules =

Find the rules for name
Find the serial
Make a keygenerator
Write a tutorial

Enjoy

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: C/C++

Published: 09. Oct, 2007
Downloads: 624

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Solutions

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Discussion and comments

alex_ls 09. Oct 2007	Good work and Yea, this crackme is more complicated than first one but the serial generation is straight forward and depend just on the c... n... , so the level difficulty is very appropriate to 2.

Cheese Cracker's Cheese-Crackme

Download Cheese-Crackme.zip, 546 b (password: crackmes.de)
Browse contents of Cheese-Crackme.zip

Hey, guys.

Please check out my first crackme, which is written for both Windows and DOS.
It might me a little bit hard, so I chose a simple Password.
Please send how you cracked it, too, because of the simple Password :D

Sorry for my bad English (I'm from Germany^^)

Cheese Cracker

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: Assembler

Published: 04. Nov, 2010
Downloads: 402

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by vachiin, published 23. nov, 2010; download (2 kb), password: crackmes.de or browse.

vachiin has rated this crackme as nothing special.

Solution by hasherezade, published 12. nov, 2010; download (265 kb), password: crackmes.de or browse.

hasherezade has rated this crackme as quite nice.

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Discussion and comments

Cheese Cracker Author 04. Nov 2010	I fear I forgot to say, that you should get it while you don't patch it, thank you :D
hasherezade 04. Nov 2010	Thank you for this crackme, it was very cute, I solved it ^^
Arkantos 05. Nov 2010	I solved it too... Now writing a solution
vachiin 20. Nov 2010	I solved, nice idea in this crackme
Cheese Cracker Author 27. Nov 2010	Thank you for your nice comments ;D
liu1960 25. Mar 2012	I solved, Tank you for your crackme
phaxe 21. Nov, 14:44	I solved it ! Interesting crackme

chevron's PatchMe nag removal

Download knackmig.zip, 7 kb (password: crackmes.de)
Browse contents of knackmig.zip

This minimal program will prompt the user to enter a string which is then hashed. However, a nag (in the form of a message box) is displayed before the result is shown.

Can you remove this nag while keeping the program functional?

Either patch these changes to the file, or describe what changes you make.

NOTE: make sure you get the hash print-out after running the program. It is tested for Windows 7 but should work on other Windows versions as well. If you get the result printed, it works.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 7 Only
Language: C/C++

Published: 09. Feb, 2016
Downloads: 121

Rating

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Solutions

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Discussion and comments

acruel 27. Feb, 14:23	looks like a kind of virtual machine :)

ChOoKi's kgm8

Download kgm8.zip, 411 kb (password: crackmes.de)
Browse contents of kgm8.zip

Hi all,

My first challenge here, not quite sure about the difficulty level so i gave it a '2' letting you decide for yourself. With a handful of variables, it should be relatively easy to solve yet it might not be the best choice for a complete beginner, therefore the preferred solution is keygen.

Have fun and best of luck all.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 11. Feb, 2011
Downloads: 394

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by KKR_WE_RULE, published 04. mar, 2011; download (1225 kb), password: crackmes.de or browse.

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Discussion and comments

ChOoKi Author 11. Feb 2011	Update: During the time needed for this kgm to be approved at this forum, 3 members at a friendly forum have already presented me their working solutions, therefore i would expect their discretion here by not posting their solutions denying others their fair chance.

acruel 07. Sep, 09:38	Found the secret code without knowing the password. Will post a solution later ;)
RobertoTuS 09. Sep, 03:43	<a href=http://apcalis.club>apcalis</a>
fdjkf 15. Sep, 09:03	I traced the execute file to the key point of printing the secret code, but didn't find any algorithm about how the encrypted codes is encrypted. Did we need us to brute-force it?
acruel 15. Sep, 13:07	I think brute-force is a viable option, but not necessary.
fdjkf 18. Sep, 01:45	what I meaned is that, there are some encrypted codes which may include the secret code, and if we input the correct password, the programe will produce the key to decrypt the encrypted code. But, I didn't see the algorithm that how the decrypting key is produced; So, I imagined that the decrypted code may begin with push ebp (0x55) mov esp,ebp (0x89,0xe5) ,and compared with the first three byte of encrypted codes I guess the first three bytes of the key is 0xXXXXXX , so what I needed to brute-forced was the last byte (0x00-0xff). It means that key may be 0x00XXXXXX-0xffXXXXXX, but unluckily after trying 256 times, the tries all failed, and the result is it occured 9 times that the crackme went into a endless-loop, and 247 times printing "incorrect password". The result told me that the right decryted codes will not begin with push ebp move ebp,esp. This is just my thought about this programe, and I wait other one to give their right method to crack this, and I am interested with this crackme, Thank you.
acruel 18. Sep, 13:57	You're almost there. I chose almost the same approach as you, but using a fixed string instead of the function prologue (push ebp, etc.).
fdjkf 20. Sep, 01:42	Thank you. I have some new thoughts about that. But I am so busy these days, I will try it later.
fdjkf 26. Sep, 01:02	unluckily, I failed again. Sorry for your help, I will try again later.
daryl 26. Sep, 01:29	I've successfully reverse engineered the staple binary and wrote a brute forcer that correctly re-produced some "obfuscated data" inside the staple program. Using the recovered data I was able to unpack the zip file. My solution zipfile contains my brute forcer and the staple disassembly with my comments. As with Acruel, I produced the secret code before knowing the password. Even though the password is in the zip file, the value produced by my brute forcer would likely allow me to write another program that reproduces the password.
fdjkf 30. Oct, 13:58	Thank acruel. This programe indeedly doesn't give any hints about which value the key used to decrypt the encrypted data should be. I used another 4-bytes string(0x0804xxxx) to recover the key, but failed.
acruel 30. Oct, 22:55	@fdjkf endianness is crucial
daryl 08. Nov, 02:14	My solution was rejected by andrew.us. Apparently he can't or is unwilling to grok a 60 line C file solution, 20 lines of which are comments explaining how the executable works as a solution. He rejection states "need better solution/explanation". Regardless, here's my working solution if anyone's interested. I bother to paste it because I spent a significant amount of time working on it and it may be helpful to someone. I realize a lot of solutions posted by newcomers are probably garbage, but if the moderators can't be bothered to do more than reject in four words a perfectly correct and functional solution I spent many hours working on, then I won't be bothered to spend any more of my time here. Farewell. -Daryl #include <stdio.h> #include <string.h> /* * Solution by Daryl * * This guy brute forces the xor'ed code section in the 'staple' binary * and searches for the string "ecret ". When that string is found it * outputs the xor argument (edx in instruction 'xor eax, edx' at file * offset 0x647). It also writes out to the specified file the opcodes * (and other data) from the xor'ed portion, all 0x88 bytes worth. * * Also in my solution tarball can be found the disassembly with my * comments that I used in producing this solution. * * This program takes a couple minutes to run and will eventually * produce the correct argument: 0xcdc40493. The disassembly output * file contains, well, the disassembled section of code that is * originally obsfuscated. That section contains, of course, the * password for the zip. / int main(int argc, char argv[]) { char orig[0x88]; char tmp[0x88]; unsigned int x, y; int idx; FILE fd; if(argc != 3) { printf("Usage: bruter <staple binary> <disassembly output file>\n"); return 1; } fd = fopen(argv[1], "r"); if(fseek(fd, 0x54a, SEEK_SET) != 0) { printf("blew up\n"); return 2; } fread(orig, 1, 0x88, fd); fclose(fd); for(x = 1; x != 0; ++x) { for(idx = 0; idx < 0x88; idx += 4) { y = ((unsigned int )(orig + idx)); y ^= x; ((unsigned int *)(tmp + idx)) = y; } for(idx = 0; idx < 0x83; ++idx) { if(tmp[idx] == 'e') { if(memcmp(tmp + idx, "ecret ", 6) == 0) { printf("Func32() output: 0x%x\n", x); fd = fopen(argv[2], "w"); fwrite(tmp, 1, 0x88, fd); fclose(fd); return 0; } } } } printf("Couldn't find correct value\n"); return 0; }

ChupaChu's 1st FishMe by ChupaChu

Download 1st_FishMe_by_ChupaChu.zip.zip, 4 kb (password: crackmes.de)
Browse contents of 1st_FishMe_by_ChupaChu.zip.zip

Ok, here it is - easy VB6 coding, easy upx packed..

only one RULE: - no cracking/patching, just *fish* for it

This is my first fishme so dont be dissapointed if it's too easy, its good to practice, right :?)

*there are many solutions possible for this one* so keygening it could be a challange also :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 22. Jun, 2007
Downloads: 520

Rating

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Solutions

Solution by Cyber_Punk_III, published 01. jul, 2007; download (90 kb), password: crackmes.de or browse.

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Discussion and comments

ChupaChu Author 01. Jul 2007	Well done Cyber Punk III !!! Just a funny question - did you try FishME-PlZ as a serial? It was in front of your eyes all the time :) Good work! ChupaChu

ChupaChu's ChupaChu Challange #4

Download 4th_ChupaChu_Challange.zip, 4 kb (password: crackmes.de)
Browse contents of 4th_ChupaChu_Challange.zip

Here it is, 4th edition of newbie licensing system :)

Coded in VB6. Packed with UPX.

Please make keygen.

If you serialfish a working serial, please post here your windows username and computer name also, so i can verify your solution!
(this is also a free hint of how license is calculated;)

Good Luck!

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 27. Jun, 2007
Downloads: 425

Rating

Waiting for at least 3 votes
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Solutions

Solution by MACH4, published 14. oct, 2008; download (58 kb), password: crackmes.de or browse.

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Discussion and comments

MulleDK13 30. Nov 2008	Packed with UPX? Not as far as I can see <.<

ChupaChu's ChupaChu Challange #5

Download Challange#5.zip, 5 kb (password: crackmes.de)
Browse contents of Challange#5.zip

Your TASK: Keygen it.

Rulez:

No Cracking or code or resource editing allowed!

Post your solution on forum!

Good luck, and have a nice day!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 27. Jun, 2007
Downloads: 344

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Solutions

Solution by MACH4, published 16. oct, 2008; download (46 kb), password: crackmes.de or browse.

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ChupaChu's FishME by ChupaChu #2

Download 2nd_FishMe_by_ChupaChu.zip, 5 kb (password: crackmes.de)
Browse contents of 2nd_FishMe_by_ChupaChu.zip

Again easy VB6 coding, easy upx packed
(use -d option to unpack)..

Also there is only one RULE: - no cracking/patching,
just *fish* for it AND post here any feedback!

This is my second fishme so dont be dissapointed if it's too easy, its good to practice, right :?)

*there are many solutions possible* so keygening it will be very good thing to do. It is not hard!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 22. Jun, 2007
Downloads: 429

Rating

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ChupaChu's SOLVE me then keygenMe, Easy

Download ChupaChu-solve_me.zip, 15 kb (password: crackmes.de)
Browse contents of ChupaChu-solve_me.zip

TASK:
Fish a valid serial, so you can get a GOOD BOY message.
Then Code a standalone keygen!

PLEASE RESPECT THESE RULES:
1.do not post fished serial so everyone can see it!
2.no patching,
3.no bruteforcing,
4.no riping;

anything else is alowed!

Have fun, and enjoy it!

BR; ChupaChu!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 02. Apr, 2008
Downloads: 574

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by ORacLE_nJ, published 08. jul, 2010; download (49 kb), password: crackmes.de or browse.

ORacLE_nJ has rated this crackme as quite nice.

Solution by Coderess, published 25. may, 2010; download (14 kb), password: crackmes.de or browse.

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ChupaChu's Where is the FISH?

Download ChupaChu__s_FISH_quest.zip, 15 kb (password: crackmes.de)
Browse contents of ChupaChu__s_FISH_quest.zip

Your quest if to fish a valid serial.

RULE #1 is NOT to leak out serial to public, so others can try it as well.

RULE #2 - Anything else is alowed.

Have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 26. Mar, 2008
Downloads: 412

Rating

Votes: 3
Crackme is nothing special.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to cipix »

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Discussion and comments

ChupaChu Author 29. Mar 2008	First one whom PM'me with serial was: Zaphod! - Well done. Hopefuly it was fun :)
DigitalAcid 29. Mar 2008	Part 1, 2 and 3 i was able to pass, but then i'm a bit stuck. I should probably enter a different serial instead of trying my current serial =).

cipix's english text

Download kasa.zip, 248 b (password: crackmes.de)
Browse contents of kasa.zip

Encrypted english text

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 22. Sep, 2003
Downloads: 1108

Rating

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Solutions

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Discussion and comments

HMX0101 08. May 2006	It look easy, but is a little bit harder...
indomit 08. May 2006	Any idea? What is the algo? It doesn't resist statistic analyze...
Ox87k 08. May 2006	if there is more than an operation, i think it's impossible!

citylights's citylights crackme #1

Download crackme.zip, 270 kb (password: crackmes.de)
Browse contents of crackme.zip

Crackme #1 by citylights

You need a secret code to escape from the vice city.
Find the correct numbers to calculate the code.

have fun

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 23. Aug, 2013
Downloads: 297

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Solutions

Solution by rmolina, published 03. sep, 2013; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

Artfulwave 28. Aug 2013	The .exe is calling a function which called _calc on CrackThisApp.dll this function takes 9 arguments (FirstBoxValue,SecondsBoxValue, etc) after some calculations it calls another function within the same DLL it takes 9 arguments then it compares 2 values it jumps if conditions met else it a function which takes 9 arguments ( the function which has just been called and and compare again jump if conditions met otherwise call the function again.. Personally i prefer doing the same as you done GetProcAddress(hCrackApp, "_calc"); and then call that function.That`s not allowed right ?
citylights Author 31. Aug 2013	if my understanding of your words is correct, it will fail the calculation process. But I don't really care if you try.
rmolina 01. Sep 2013	Are we expected to use bruteforce on it? I believe I understand the validation, and I wrote a simple keygen which generates a restricted subset of solutions. For all those generated solutions I got a "Congratulations! The answer is %s", but the last part is just garbage, not a readable string.
rmolina 01. Sep 2013	I asked before about bruteforce because I thought that you were expecting just one valid solution which might be used in order to decrypt some message. It seems like you just wanted to print the solution in the missing part of the string, so I am confused. I will send you a PM with some of my generated solutions in order to check if they are valid. Thanks.
citylights Author 01. Sep 2013	sorry, it seems that I left out some stuff in the validation process, the acceptable solution will display an english word. And I will also take bruteforcing solutions as acceptable as long as you can find the correct combination among them.
rmolina 01. Sep 2013	Then, it would probably be better to update the file.
rmolina 01. Sep 2013	It took less than a second to bruteforce it :) "Congratulations! The answer is: Disbelief"
rmolina 02. Sep 2013	Well, it was not complete bruteforcing...

cli3nt's mycrk

Download mycrk.tar.gz, 5 kb

Language C
Linux x86/ELF

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 01. Apr, 2006
Downloads: 1570

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by _pNg, published 22. jul, 2006; download (54 kb), password: crackmes.de or browse.

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Solution by justinf, published 10. apr, 2006; download (1006 b), password: crackmes.de or browse.

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Solution by Qnix, published 04. apr, 2006; download (2 kb), password: crackmes.de or browse.

Qnix has rated this crackme as boring.

Solution by lord, published 04. apr, 2006; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Qnix 01. Apr 2006	Done . [easy]
cli3nt Author 02. Apr 2006	good it should be easy (:
crackmesdotde 06. Feb 2009	First crackme I tried. Thanks :-)
H2CO3 07. Jun 2012	Easy, done. :-)
heraton 23. Dec 2012	This is a good one to take a first shot on crackmes. I like it. My cracked version now expects 42 for cd-key. You've got to know, where your towel is ;-)

cnbragon's A funny Challenge Crypto Keygenme

Download FunnyKeyGenMe.zip, 48 kb (password: crackmes.de)
Browse contents of FunnyKeyGenMe.zip

this is a funny crypto keygenme which need some special knowledge. Only KeyGen is the best solution, not submit your patch or sth. else.So open your eyes and make a kg for it.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 11. Apr, 2006
Downloads: 588

Rating

Votes: 7
Crackme is quite nice.

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Solutions

Solution by thehyper, published 08. jul, 2006; download (286 kb), password: crackmes.de or browse.

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Discussion and comments

astigmata 11. Apr 2006	I think you need this http://www.secretashell.com/cryptocrk/tutorials/miracl.calls.zip
m@rio_crk 12. Apr 2006	..or this: http://www.cryptosig.prv.pl/ btw. nice kgnme ;)
jB_ 12. Apr 2006	I expected something harder from you. Nice one, and really easy if you open your eyes =)
cnbragon Author 12. Apr 2006	yep, in this kgm i neglected sth. so it's become easy enough now .and waiting for some time, the next will satifying:-)
bLaCk-eye Moderator 20. Apr 2006	NOTE: some of the comments removed on the request of the person that posted them. bLaCk
HMX0101 22. Jun 2006	nice keygenme, this is a good crackme for newbies like me!, thanks! my keygen: http://rapidshare.de/files/23833891/keygen.rar.html maybe i write a solution for this crackme!
Ox87k 23. Jun 2006	yeah hmx0101, i solve it recently too! (but i don't know if i'll have some time to write a tut. = However, good crypto's challenge for noob like me :D
thehyper 26. Jun 2006	name=serial^65537 mod N.how do you factor N? It is so big. Am I missing something :(
thehyper 30. Jun 2006	found it. lol. indeed a funny challenge!

cnwinndy@163.com's vb-keygen me!

Download vb-keygenme.zip, 28 kb (password: crackmes.de)
Browse contents of vb-keygenme.zip

A little trick to self-check, string-protecting

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 19. Jan, 2006
Downloads: 267

Rating

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Solutions

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Send a message to cobrasniper555 »

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Discussion and comments

KrasivayaSvo 20. Jan 2006	I don't correctly unpacking it. After unpackining programm show me MessageBox with text "Run-time error '7': Out of memory". It's my problem or it must be?
KrasivayaSvo 20. Jan 2006	Tested at Windows Server 2003 Enterprise, Windows XP SP2 Professional and at Virtual Machine created by VirtualPc with Windows XP Proffesional w/o SP1,SP2
code_inside 20. Jan 2006	I haven't really looked into this CrackMe (I don't like VB too much :) ), but the program is packed with UPX so you can probably use UPX itself to unpack it (So you can be sure that it's not your unpacking problem :) ). Also note what it says above "A little trick to self-check", so the CrackMe probably performs some kind of CRC check to see if it's unpacked (And then it let's the CrackMe maybe crash...) Hope this helps a little bit... :)
cnwinndy@163.com Author 22. Jan 2006	Run-time error \'7\': Out of memory Just a little trick to ensure that it is not unpacked.

cobrasniper555's Crackme #2

Download Test.zip, 11 kb (password: crackmes.de)
Browse contents of Test.zip

A not so useful crackme/keygenme for any use in the field, or from what I've heard of, but it may be very interesting to solve! I suggest you try it, but please, note that this keygenme might set off alarms on protection software!

Thanks and I'll see you all soon with solutions and keygens!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 24. Aug, 2006
Downloads: 937

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Solutions

Solution by Nuno_1, published 30. aug, 2006; download (53 kb), password: crackmes.de or browse.

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Discussion and comments

l0calh0st 23. Aug 2006	Only create a registry key and the program itself displays the correct code...I hope it is intentional again as your previous one which i thought was buggy :D
boonz 23. Aug 2006	careful h0st, don't spoil the fun :D
l0calh0st 23. Aug 2006	lol....i could have spoiled by telling the Registry Key :D
HMX0101 23. Aug 2006	Damn, it put the correct into the editbox XD I think your crackmes have several bugs ;)
geeko 24. Aug 2006	I already sent the solution with a bit of how his key is generated (simple and interesting algorithm). What about thinking of that guys? in cobra's next crackme, u wont see the key :-)
geeko 24. Aug 2006	just as i said. he is not fair. he modified the EXE meanwhile!
zairon Moderator 24. Aug 2006	Yes, he modified the crackme just because it was bugged; I can't see nothing strange in it. Please, work on the new one. Sorry for the inconvenience.
l0calh0st 24. Aug 2006	Can i submit the old crackme as my keygen..lol
geeko 25. Aug 2006	as i mentioned in the solution, you can easily use his own encryption routine without worrying about what it does! g'luck. Why my solution still awaits?
zairon Moderator 25. Aug 2006	>Why my solution still awaits? Simple, because I haven't check it yet. I know when it's the right time to check solutions, please be patient and wait like all the others.
geeko 26. Aug 2006	zairon, please show somewhere on the site how much mean time it takes for a solution to be accepted or rejected and for an uploaded 'creckme' to be accepted or rejected. 1 day? 1 week? 1 month? 1 year? (or maybe let the author decides) I sure wait, but it's nice to know about how much. thank you!
zairon Moderator 26. Aug 2006	Geeko: this space is used for talking about the crackme, the others are not interested in our external comments. I'll surely explain everything via pm... read my message.
cobrasniper555 Author 27. Aug 2006	I'm sorry guys, my crackme I sent first was my beta version and when you put in the name, it gives you the serial just as a check to see if everything is working. An I realized I submitted the wrong one, but now, enjoy and I see absolutely no bugs.

cobrasniper555's Keygenme #1

Download Keygenme.zip, 15 kb (password: crackmes.de)
Browse contents of Keygenme.zip

My first crackme! Hope you have fun! Try not to ruin it pros! :P

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 06. Aug, 2006
Downloads: 1305

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by BaKaE, published 18. sep, 2006; download (1 kb), password: crackmes.de or browse.

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Solution by boonz, published 08. aug, 2006; download (96 kb), password: crackmes.de or browse.

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Send a message to codeinject »

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Discussion and comments

cobrasniper555 Author 07. Aug 2006	I did mean for this crackme to be the easiest of all, lol. So I put it up. I mean for this crackme to be for first-time beginners. Please don't tell the answer...sorry for erasing your posts HMX0101 and boonz.
boonz 07. Aug 2006	hehe, i join in, HMX0101 ;)
boonz 08. Aug 2006	you got it, l0calh0st, you screwed up =P
HMX0101 08. Aug 2006	Haha, sorry again :) boonz, congratz for your solution :P
boonz 08. Aug 2006	Yes, sure, save the roses :D
UsernameDenied 24. Feb 2007	Great for beginners^^
jamesinuk 27. Jan 2008	I found a small problem in your keygen me... when you enter nothing and press "activate" it says "You did it!"
Valliko 16. May 2009	I'd like to thank you for releasing the source code aswell, very useful for me (im a beginner in WinAPI) :)

codeinject's codeinject CrackMe

Download CI-CrackMe#1.zip, 4 kb (password: crackmes.de)
Browse contents of CI-CrackMe#1.zip

Works on Windows Vista+

Small CrackMe with some Anti-Debugger techniques.
Write a small keygen it's not that hard. But you'll need to really understand your debugger (I think).
Write a nice tutorial and please let me know how long it took you.
So I can include this within my thesis as a field report :)

From the README:
This is my very first CrackMe.
I doubt it's hard. It's been developed as a part of my Thesis.
All the normal rules apply, no patching etc.
Write a Keygen and a tutorial on how you've beaten me.

It's been developed with HxD, MSVC++ 2k10, ImmunityDBG a lot of manual crafting work.
When it's cracked I'll release the original source code for those interested.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows Vista Only
Language: C/C++

Published: 21. Nov, 2012
Downloads: 143

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Discussion and comments

kao 22. Nov 2012	Correct me if I'm wrong, but due to the way you are generating s/n, this crackme cannot be keygenned on newer PCs (CPUID eax==0xA returns performance counters..)

Coderess's DriverCrackme#1

Download DriverCrackme#1.zip, 14 kb (password: crackmes.de)
Browse contents of DriverCrackme#1.zip

DriverCrackme#1
=============================
Use VM (VmWare)
Tested only on Windows XP sp2, sp3

Tasks
1. Find License key, General Key for your nickname
2. Write keygen
3. Write solution

Thanx to: Roman, Unity, daFix

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 13. Apr, 2010
Downloads: 465

Rating

Votes: 6
Crackme is quite nice.

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Solutions

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Discussion and comments

virw_ 15. Jan 2011	spent the night but nothing much found all depends on the driver, can you give me tips?
draww 18. Jan 2011	tips? use IDA, remote debug engine, windbg, VM (VmWare), google for debugging drivers, etc..
Coderess Author 18. Jan 2011	Use Syser for driver debuging or static analyze (it's more harder then dynamic but too...)
tamaroth Moderator 21. Jan 2011	Hey, I used windbg + vmware using kdvmware method (http://zezula.net/en/fstools/kdvmware.html really awesome tool, helps debugging by quite a lot!) This was basically my first hand experience with kernel debugging as such, and i must say that i liked it (but i must bash developers of windbg, had it used better ui the debugging would've been much more pleasant). The algorithms implemented were rather simple, just a shame that you didn't implement something in a manner of those bit xors for the general key (it's statically created and then simply compared with what you typed, that kinda killed the fun). You also could've keep that idea of bitsums for third and fourth part for the rest of the serial, just switch it a bit more/less and add some twist to it. I'm saying this because it's no fun to go through all this trouble of getting into a driver and then just find simple string compares there. All in all, it's a good crackme that will teach you a lot assuming you haven't had any contact with real ring0 debugging, otherwise it's nothing special (algorithmically-wise). Here's the data: tamaroth GP0G1-ROLR5-NPGBE-W8Q5G-AGMB3 5B0E02C96C765BEF0C31E1B6FEB678C7
Coderess Author 22. Jan 2011	If you solve this fully i'm going to do next version with my driver cryptor :)
tamaroth Moderator 15. Apr 2011	Ok, so finally after few months I've finally decided to make a tut for that one seeing nobody else is doing that. I've noticed that there is a small bug in crackme that may cause keygen generate invalid codes on different machines (especially on those with ASLR on for entire system) However in most cases this should work without a problem. Solution should be up soon, once i finish writing it :P
Coderess Author 19. Apr 2011	Great news tamaroth :)
Coderess Author 14. Jan 2015	Where is your solution bro? I'm retired from code-reversing but i still waiting your solution. Btw i have lost source code of this lame project and not remember what's going on in it. I want to learn that in inside. I received mail with requests help to solve this crackme so this crackme seemed interesting. With best regards, once, the best reverser in my city :)
tamaroth Moderator 14. Jan 2015	Holy moly, I completely forgot about it! I think I have somewhere around 60% of the solution done, let me dig it up from somewhere and see what can be done :)
Coderess Author 03. May 2015	Ekaranyi babai, where is your solution sailor?
tamaroth Moderator 05. May 2015	I think it's lost somewhere :) I think at this point I'd have to re-do it from scratch because it's been years. Atm I'm working on something else and unfortunately cannot promise I will do it anytime soon. But feel free to pm me from time to time to remind me to do it :)
Coderess Author 06. May, 14:07	@tamaroth A year has passed... and I yet not satisfied! @ALL: Crackme algo is simple, but if you can to write a keygen, It will make me version number 2 with true code. Try to solve this one.

Coderess's JCrackme#1

Download JCrackme#1.zip, 6 kb (password: crackmes.de)
Browse contents of JCrackme#1.zip

21:47 04.08.2015
====================================================
1. Try to create keyfile
2. Write the solution
3. Create keygen

OS: Windows 8.1 x64
====================================================
PS:
After 5 years inactivity I created Java Crackme #1
Thanks to Roman Zl for your support and understanding

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Java

Published: 13. Sep, 2015
Downloads: 167

Rating

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Solutions

Solution by draww, published 14. sep, 2015; download (441 kb), password: crackmes.de or browse.

draww has rated this crackme as quite nice.

Solution by klefz, published 14. sep, 2015; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

draww 13. Sep 2015	welcome back ;) solved and tutored...
Coderess Author 14. Sep 2015	Hi draww! Thank you for the attention. I'll wait your tutorial.
Coderess Author 17. Sep 2015	Thanks for tutorials to draww and klefz, very good solutions! I used a litle-bit maths, it's linear equation with one unknown
dittirik 22. Nov 2015	Tutorial; https://www.youtube.com/watch?v=VKeQV0ee9hM
Coderess Author 01. Feb, 09:22	@dittirik: Good video, very impressive!

code_inside's 5th CrackMe

Download codecrk5.zip, 2 kb (password: crackmes.de)
Browse contents of codecrk5.zip

Name/Organization/Serial combination

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 23. Jul, 2005
Downloads: 2403

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Solutions

Solution by NoRG, published 05. aug, 2005; download (21 kb), password: crackmes.de or browse.

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Discussion and comments

Lesco 22. Jul 2005	Win XP SP2 says:"Not a valid Win32-Application"
code_inside Author 22. Jul 2005	Yeah I know... Almost all my CrackMe's only ran on Win98SE... ;) But I believe there's an option for submitting a fixed version isn't it?
zairon Moderator 22. Jul 2005	Yes, from 'Your submission' page you can upload a new version of the crackme.
code_inside Author 23. Jul 2005	Thanks zairon. I'll try to fix the CrackMe :)

code_inside's ese

Download codeinsideese.zip, 2 kb (password: crackmes.de)
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try to decrypt the file 'encrypted.txt'

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Feb, 2002
Downloads: 2885

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Discussion and comments

aluigi
24. Apr 2007

the only idea I have had for solving this crackme is brute forcing because doesn't exist a plain text version of the file so we have zero knowledge of what we should obtain, we know only that it must contain a mail address (so probably a text file with a @ in it).
Anyway the algorithm is enough slow to brute force and we don't have informations about how is the password (alfabetic, alfanumeric, any char??? how much it's long?) and so at the moment I have thought to a brute forcer which works over a dynamic length of the file which makes it faster and then checks if all the chars in it are printable (isprintf())... but takes too much time too.
Other ideas?
Is really possible to solve this crackme without other data?

code_inside's keygenme

Download ci_keygenme.zip, 2 kb (password: crackmes.de)
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name/serial, code

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Dec, 2000
Downloads: 2574

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Solutions

Solution by *Sorcerer*, published 10. aug, 2002; download (35 kb), password: crackmes.de or browse.

*Sorcerer* has rated this crackme as awesome.

Solution by nh, published 02. dec, 2000; download (3 kb), password: crackmes.de or browse.

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code_inside's passme

Download ci_passme.zip, 1 kb (password: crackmes.de)
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serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Dec, 2000
Downloads: 2764

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Solutions

Solution by harlequin, published 02. dec, 2000; download (7 kb), password: crackmes.de or browse.

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Solution by rtz, published 02. dec, 2000; download (2 kb), password: crackmes.de or browse.

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Solution by scoob, published 02. dec, 2000; download (2 kb), password: crackmes.de or browse.

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Solution by nh, published 02. dec, 2000; download (4 kb), password: crackmes.de or browse.

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code_inside's remove

Download codecrk18.zip, 1 kb (password: crackmes.de)
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patch-me

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. May, 2001
Downloads: 2504

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Solutions

Solution by cw_, published 02. may, 2001; download (6 kb), password: crackmes.de or browse.

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Solution by nh, published 02. may, 2001; download (4 kb), password: crackmes.de or browse.

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code_inside's serializer

Download ci_serializer.zip, 2 kb (password: crackmes.de)
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name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Dec, 2000
Downloads: 2426

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Solutions

Solution by harlequin, published 02. dec, 2000; download (7 kb), password: crackmes.de or browse.

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code_inside's Snake

Download Snake.zip, 2 kb (password: crackmes.de)
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A simple CrackMe but a little bit more difficult to keygen.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 11. Aug, 2004
Downloads: 3114

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by kao, published 22. aug, 2004; download (12 kb), password: crackmes.de or browse.

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Solution by HelL_master, published 19. aug, 2004; download (56 kb), password: crackmes.de or browse.

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Solution by Plasmator, published 17. aug, 2004; download (18 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Dr.Korbin 30. Aug 2006	Yeah, this is very nice crackme! I enjoyed solving it!
Herz3h 24. Oct 2015	I used dijkstra algorithm to get the keygen down, i guess an overkill but at least it works :D Nice crackme, enjoyed it :)

code_inside's solutions

Download ci_solutions.zip, 2 kb (password: crackmes.de)
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matrix, anti-si

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Dec, 2000
Downloads: 2427

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Solutions

Solution by splinter, published 02. dec, 2000; download (1 kb), password: crackmes.de or browse.

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Solution by harlequin, published 02. dec, 2000; download (7 kb), password: crackmes.de or browse.

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code_inside's TrapMe

Download ci_trapme.zip, 3 kb (password: crackmes.de)
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A rather simple Name/Serial protection...

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 28. Jul, 2002
Downloads: 2227

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Discussion and comments

mjesun 25. Oct 2008	Not a valid Win32 file.
DigitalAcid 26. Oct 2008	Platform: Unspecified/other Language: Unspecified/other So yeah, probably not Win32 =).
zairon Moderator 27. Oct 2008	Did you try looking at the file header? You'll understand what kind of file is it...
mjesun 27. Oct 2008	Yes.. first two bytes, MZ. Lord PE says that PE is valid, and subsystem word has a value of 2, that means, Windows GUI. It's checksum is also correct, so it seems that it has not anything strange... Ok, maybe a DOS-EXE file with some fake Win32 code.. no chance forcing 16 bit code with debug.exe tool... Any idea?

code_inside's trythisone

Download ci_trythisone.zip, 2 kb (password: crackmes.de)
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serial

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Dec, 2000
Downloads: 2235

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Solutions

Solution by figugegl, published 02. dec, 2000; download (19 kb), password: crackmes.de or browse.

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codz30's Codz #1

Download Codz_#1.zip, 7 kb (password: crackmes.de)
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Easy Enough (Some parts may through you off)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 15. Sep, 2006
Downloads: 816

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Solutions

Solution by BaKaE, published 19. sep, 2006; download (8 kb), password: crackmes.de or browse.

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Solution by ackf0o, published 19. sep, 2006; download (976 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

bLaCk-bytE 16. Sep 2006	it has bug ? why not run on XP ?!
zairon Moderator 16. Sep 2006	Runs fine here (xp sp1/sp2)
HMX0101 17. Sep 2006	Here works fine (xp sp2), black byte you have .net framework installed?
BaKaE 18. Sep 2006	nice crackme,but i havent a disassembler for .NET - Proggys but I found a bug, if the EditBox is empty and click the button it comes an exception, codz30 try to avoid this !! ps: again, nice idea to work with .NET
BaKaE 19. Sep 2006	solved it but 1/10 is too high :-), it is really easy if you ask i give you a hint how to get the right serial (or read my sol)
l0calh0st 19. Sep 2006	Actually BaKaE you can do it without paying a penny.....Enter "Reflector" in google and the first link is what you want....
kaiZer-by 22. Sep 2006	oh no! This crackme not run under my XP SP2.

coffeebean's cbeans kgm 1

Download cbean__s_kgm_#1.zip, 58 kb (password: crackmes.de)
Browse contents of cbean__s_kgm_#1.zip

It's easy, however, it needs a little preliminary work. ;)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 27. Dec, 2009
Downloads: 2165

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by draww, published 09. jan, 2010; download (9 kb), password: crackmes.de or browse.

draww has rated this crackme as boring.

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Discussion and comments

BLODYALBO 30. Dec 2009	name:orhan serial:f4355-76ad-4a1a-bbe3-f72
MaxOn 30. Dec 2009	This crackme don't match his Difficulty. First, i set breakpoint at offset 403C74(its address on my computer). On this address is function wsprintf. Its generated true serial number.Function at offset 00403CB5 receives the written serial number. The next function,lstrlenA , compare size of true serial number and size of written serial number. And if strings are equal , programm call lstrcmpA, for compare two string. Its patched code: 00403CA6 . PUSH 7F ; 00403CA8 PUSH cbean's_.004050DC 00403CAD PUSH 3EA 00403CB2 PUSH DWORD PTR SS:[EBP+8] 00403CB5 CALL <JMP.&user32.GetDlgItemTextA> 00403CBA PUSH cbean's_.004050DC 00403CBF CALL <JMP.&kernel32.lstrlenA> 00403CC4 MOV DWORD PTR DS:[40515C],EAX 00403CC9 PUSH cbean's_.00405160 00403CCE CALL <JMP.&kernel32.lstrlenA> 00403CD3 CMP EAX,DWORD PTR DS:[40515C] 00403CD9 NOP 00403CDA NOP 00403CDB NOP 00403CDC NOP 00403CDD NOP 00403CDE NOP 00403CDF PUSH cbean's_.004050DC 00403CE4 PUSH cbean's_.00405160 00403CE9 CALL <JMP.&kernel32.lstrcmpA> 00403CEE NOP 00403CEF NOP 00403CF0 NOP 00403CF1 NOP 00403CF2 MOV DWORD PTR DS:[40500B],0AFF85 00403CFC PUSH 1 00403CFE PUSH 0 00403D00 PUSH 0 00403D02 PUSH DWORD PTR SS:[EBP+8] 00403D05 CALL <JMP.&user32.RedrawWindow> 00403D0A JMP cbean's_.00403DBF 00403D0F CMP DWORD PTR SS:[EBP+10],3EC 00403D16 JNZ cbean's_.00403DBF TRUE SERIAL NUMBER IS: e91fb-4d81-4202-ac7f-a20
kilobyte.asm 31. Dec 2009	posting name/serial combo doesn't mean anything this crackme can be fished in under a minute with one breakpoint. That isn't the point, keygen it and write a tutorial and explain to us the scheme.
dahiphop 31. Dec 2009	Name: DAHipHop Serial: e5f76-6a5c-bed1-f5ba-58e => Very easy => Difficulty: 1
coffeebean Author 31. Dec 2009	To everyone posting user/serial combination: FACEPALM. Come on, that is NOT the point of this keygenme, study what's actually happening and show some enthusiasm for the code. Real crackers aim to write keygens, you learn most that way.
draww 31. Dec 2009	hello coffeebean.. really nice crack me.. i've solved it.. i'm writing a keygen and the solution text right now ;) will be back soon. 2Eh XOR 7Bh = 55h.... nice trick.
draww 31. Dec 2009	i just submit my solution.. thanks for the crack me ;)
draww 31. Dec 2009	link to my solution, happy new year! http://www.mediafire.com/?mmjtgdtnmjy
coffeebean Author 01. Jan 2010	good work draww! Brilliant tut. Happy new year everyone!
kilobyte.asm 01. Jan 2010	was going to write tut but i'll wait for draww's to be submitted
draww 01. Jan 2010	thank you coffeebean, happy new year too.. keep up the good work (;
Akusei 08. Jan 2010	I disagree with a few of the comments here. The difficulty is appropriately marked as 3. If you were required to simply provide a name/key combination with no explanation, the difficulty would easily be a 1. This is not the case however, you are required to create a keygen and provide an explanation of the key generation process. There are about 4 to 5 unique things about this crackme that put it at a "Getting Harder" difficulty, that is, if you actually take the time to understand what is being done and what is being used. Good job, I enjoyed this one... maybe I'll actually spend the time to write a tutorial/keygen for it. I know it's been said previously but if you have a solution, please post it as a solution and not a comment. Also, try not to give away too much about the crackme in the comments... you don't want to spoil it for everyone.
r-Evolution 30. Sep 2010	name: SearcH_AnD_DeStroY serial: 4050c-25bb-ab42-578d-f56 sorry but i have no time for a solution
draww 27. Nov 2010	this is interesting.. in some long names the serial algo is broken and the final serial is shortened as follows: name: heyyaaaaaaaaaaaaaa serial: 80084-7 and it works :)

CoilBuilt's The Big Picture

Download TheBigPicture.zip, 12 kb (password: crackmes.de)
Browse contents of TheBigPicture.zip

To solve this one you will need to see things for what
they really are. Key Generator is only accepted solution.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 05. Dec, 2009
Downloads: 377

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Solutions

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Discussion and comments

HMX0101 05. Dec 2009	Long routine, just to make two simple operations? That's absolutely insane :/
HMX0101 05. Dec 2009	Also, this crackme its overrated.. it should be 1 :)
CoilBuilt Author 05. Dec 2009	Agreed maybe a mod will lower it some? And yes, that is the big picture, however creation of the polymorphic algorithm is more the focus and interesting part than the fact it's two simple operations- that misses the point completely. I can write operations till your eyes bleed but it wont make it any more fun to reverse.
HMX0101 06. Dec 2009	I would like to see that, because if you think I solved it stepping all that lines of code, then you're pretty wrong :)) Polymorphic algo isn't that great too, you could improve it and make use of jumps, cmps, flags, etc.. this one is too basic (mov, add, sub, xor, imul).. but I know you probably will improve it in the future :D Cheers!

cominox's C-Crackme ( me+er )

Download C-Crackme.zip, 15 kb (password: crackmes.de)
Browse contents of C-Crackme.zip

this Crack me is an easy one, really but still it test the basic knowlege of cracking a C program.
good luck cracking ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: C/C++

Published: 22. Jun, 2013
Downloads: 138

Rating

Votes: 7
Crackme is quite bad.

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Solutions

Solution by seVeb, published 28. jun, 2013; download (149 kb), password: crackmes.de or browse.

seVeb has rated this crackme as boring.

Solution by iSSoGoo, published 28. jun, 2013; download (2 kb), password: crackmes.de or browse.

iSSoGoo has rated this crackme as boring crap.

Solution by B@zz!, published 28. jun, 2013; download (2 kb), password: crackmes.de or browse.

B@zz! has rated this crackme as nothing special.

Solution by neo85, published 28. jun, 2013; download (536 kb), password: crackmes.de or browse.

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Send a message to complxor »

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Discussion and comments

B@zz! 22. Jun 2013	Writing the solution took longer than crack this haha but it's still a good CrackMe for beginners!
seVeb 23. Jun 2013	yup i agree with B@zz!, thanks for making it :)
Pride 26. Jun 2013	This is a little too easy. Maybe set difficulty to 1. I'm a really noob at cracking but this was too easy.
deurus 27. Jun 2013	Ok but is overrated, also a noob can crack it.
_f13 03. Jul 2013	It's a pre-cracked crack :D
hackerpro536 16. Sep, 08:03	Cracked: cominoxer

complxor's KeygenmeWoo!

Download keygenme.zip, 155 kb (password: crackmes.de)
Browse contents of keygenme.zip

Create keygen or serial for you
send to jorge63@gmail.com or on crackmes.de
no patching

bye
complxor

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 17. Nov, 2004
Downloads: 1076

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Solutions

Solution by scarabee, published 21. nov, 2004; download (3 kb), password: crackmes.de or browse.

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Solution by Neitsa, published 21. nov, 2004; download (63 kb), password: crackmes.de or browse.

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Solution by zombie8, published 21. nov, 2004; download (1 kb), password: crackmes.de or browse.

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conflux's Keygenme Conflux1

Download conflux1.1.zip, 247 kb (password: crackmes.de)
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Rules:
Don't patch/crack.
Make a Keygen.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 08. Jul, 2015
Downloads: 1226

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Solutions

Solution by eyeeye8338, published 29. jul, 2015; download (762 kb), password: crackmes.de or browse.

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Discussion and comments

Kaltwa55er 29. Jun 2015	I am new and believe I passed this one. I don't think you need to really make a Keygen for it.
saneki 30. Jun 2015	Am I wrong, or is there only one correct key? If so, there's not much point in making a keygen.
Kaltwa55er 01. Jul 2015	Yea we are only putting in a serial key to complete it. If it was going to be some calculated serial key we need to give it another set of data such as username or an API call to perform an algorithm on. I didn't see any of these.
conflux Author 07. Jul 2015	hi Kaltwa55er, you are right, its unnessecary to make a key"gen", a program that gives you a working key is enough, but i dont know how they are called ;) And since this working key does change, i think its ok to call it keygen.
conflux Author 07. Jul 2015	oh, i see what you mean Kaltwa, i forgot to include a function while i wrote it, i try to reupload the better version :)
eyeeye8338 15. Jul 2015	is ok to attach an executable wich displays the correct key and starts the conflux1.1.exe file?
Shindanaide 15. Jul 2015	Can't understand why the last letter always changes
Unvarying 15. Jul 2015	This is really complicated.. You marked this as easy?
Unvarying 15. Jul 2015	I found the pass, but it terminates the program either way. The only way I was able to display the good message was by changing the offset of [ebp-71] to 0x01 at 0x00401488
conflux Author 16. Jul 2015	@Unvarying: i tested my program, if you know what you do, the "good job" message appears and stays until pressing 2 times enter(2 times getchar for convenience) @eyeeye8338: well, if it doesnt change the program itself, i guess its ok :) @Shindanaide: if something always changes, what could it be?
Shindanaide 16. Jul 2015	@conflux i don't now, i'm still learning :) I thought it was a random thing but i cant find the logic :(
conflux Author 16. Jul 2015	@Shindanaide: you can't find the logic, BECAUSE it's random ;)
Shindanaide 16. Jul 2015	So I jump the random part and put a constant char ? :)
conflux Author 16. Jul 2015	think please how a computer generates random numbers, or instead, think of what functions of the OS a program has to call if it uses a random number. Now, what would you do if you know one of the above?
Matteo 19. Jul 2015	there is much logic in random funcion :) srand(time(NULL)) is far from being random, in fact i have used it in my crackme given the seed you can know every number that rand will return.
Unvarying 19. Jul 2015	Either this is NOT for newbies, or I suck at reversing more than I thought... you sure this is for noobs?
Apocatarsis 27. Oct 2015	Newbie question here, The program checks if the serial is correct at 0x00401488, if so, it prints the "Good job" message and waits for two getchars (enter presses) before terminating. Otherwise it jumps to 0x4014a2. My question is, what is happening from this point to the end? Why is there so much code if the program has already determined that the serial is incorrect?

ConJan's Jump Around

Download Jump_Around.zip, 1307 kb (password: crackmes.de)
Browse contents of Jump_Around.zip

Hi all,

in front of you is a piece of... ehm... another crackme.

It contains easy and hardcore algorithm. So you can choose one.
Code is obfuscated with JMPs.

Solution = Serial Number, KeyGen

Download link
http://ironscrew.wz.cz/Jump.Around.zip

Additional info in .nfo

Have fun with it.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 06. Dec, 2009
Downloads: 761

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by andrewl.us, published 28. may, 2010; download (14 kb), password: crackmes.de or browse.

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Discussion and comments

ConJan Author 23. Dec 2009	No solution? Not even easy algo? What is the problem? Give me a gift for Christmas and solve it :)
Hack_ThE_PaRaDiSe 19. May 2010	Hi, ConJan I saw your post in my challenge regarding yours. I took a look at your obfuscation, it is very effective. I managed to solve the first part. If you want I can post a working serial for it.
Hack_ThE_PaRaDiSe 19. May 2010	Maybe I will take a look also at the hardcore later. :D
BoRoV 19. May 2010	I'm solved all part ))
ConJan Author 20. May 2010	You are good, both. But I don't see any solution :) and I don't mean SN (belive you), but something to help with tracing or some deobfuscator will be nice. How tough was it? What if I obfuscate more code, will it be much harder? What should be added to make tracing harder? If is anyone interested in this obfuscation and want to improve it and make (of course) a crackme let me know (give some info on how to), because I will not continue in this project.
BoRoV 20. May 2010	@ConJan: at first me need write deobfuscator, then I can make full solution
BoRoV 28. May 2010	very nice solution, thanx andrewl.us :)
andrewl.us Moderator 28. May 2010	@BoRoV: thanks! @ConJan: in response to your message "If is anyone interested in this obfuscation and want to improve it and make (of course) a crackme let me know (give some info on how to), because I will not continue in this project." ... yes, we'd like to see a new crackme with improved obfuscator!
ConJan Author 29. May 2010	@andrewl.us: nice work, really. so many work. I'm glad you wasted several hours on hardcore algo :)

connr's Connr's Crackme

Download Crackme.zip, 636 b (password: crackmes.de)
Browse contents of Crackme.zip

It is very simple but sort of challenging. Not written to be especially hard...

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: Assembler

Published: 09. Aug, 2008
Downloads: 791

Rating

Votes: 6
Crackme is quite bad.

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Solutions

Solution by wibf, published 18. sep, 2009; download (3 kb), password: crackmes.de or browse.

wibf has not rated this crackme yet.

Solution by xylitol, published 19. aug, 2008; download (32 kb), password: crackmes.de or browse.

xylitol has rated this crackme as boring.

The submission of solutions is closed.

Discussion and comments

ReDucTor 10. Aug 2008	Oh god, this one is too easy. upx -d crackme.exe Open in disassembler, and you cant do it, theres something wrong.
Ox87k 10. Aug 2008	ReDucTor, this is level1! Maybe for newbies it isn't too easy.. ;-)
br0ken 10. Aug 2008	@Everyone How do you find out if a DOS proggie is packed or not? And how to tell which packer is used?
Ox87k 10. Aug 2008	br0ken, a little trick would be open with an hex-editor and see the name of the sections :P
br0ken 10. Aug 2008	Okay. Thanks :)
DigitalAcid 11. Aug 2008	Cool, my very first DOS Program solved :P.
simonzack Moderator 12. Aug 2008	I don't have a clue It takes 5 minutes to load (~.~), and I can't debug it???
br0ken 12. Aug 2008	Olly can't handle 16 bit exes. IDA is probably the only one I know. But IDA is like an alien software to me (it's just too complex when compared to Olly) But still, you can solve this cme using IDA. Takes less than 30 secs once you disassemble it. You need to unpack first. (although, some can do it without unpacking)
simonzack Moderator 13. Aug 2008	@mod: Why did my post get deleted? I posted a wrong serial, and it doesn't work when I enter it, so I was asking for some help @br0ken: thanks, I tried wdsm32, found the pass but doesn't work for some reason :O
Ox87k 13. Aug 2008	@simonzack: maybe you found a wrong password.. :P
simonzack Moderator 14. Aug 2008	omg ;.; I forgot that the pass was reversed when printed fail
hackereha 16. Aug 2008	yup easy one thx anyway:)
东方介 29. Sep 2008	Oh god, this one is too hard. how to unpack a DOS program?
东方介 29. Sep 2008	Good!I cracked it without unpack,hehe,thx very much!
paihdeaiti 29. May 2012	Whoah, I could crack it without unpacking! At the same I learned a new way to produce myself a headache. :D
paihdeaiti 29. May 2012	At first I thought it was just badly obfuscated and for some stupid reason designated as a beginner challenge, but perhaps I'm perhaps not just that high level oriented, so I just ran it instruction by instruction in MSDOS Debug. Watching the unpacking sequence made me feel like my head was about to explode :P and as it finally lay in the segment the actual code was being run in I got the what-to-do idea instantly. Though I could only manipulate the memory contents.. perhaps I was lucky to find the opcodes from the Crackme.exe hexdump :)

Cooglefish's DontPatchMe

Download DontPatchMe.zip, 4 kb (password: crackmes.de)
Browse contents of DontPatchMe.zip

Hi folks!

This is my first keygenme. I called it 'DontPatchMe' so the rulez should be clear: write a keygen or explain the calculation. If you understand the way it goes, you could also bruteforce a serial. But mostly I would like to know, if the calculation is reversable, so please try this first.

If you fail: no matter.
If you solve it: you are MY reversing-god.

I wish you a lot of fun!
Cooglefish

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 08. Mar, 2008
Downloads: 238

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by the analyzer, published 02. apr, 2008; download (155 kb), password: crackmes.de or browse.

the analyzer has rated this crackme as quite nice.

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Discussion and comments

the analyzer 29. Mar 2008	Hi fisher man :) i have uploaded a simple tutorial. i hope u enjoy it!!!
Cooglefish Author 02. Apr 2008	Great work, Analyzer!!!! By the way: the algo is based on the so called 'galton's board'.
the analyzer 03. Apr 2008	Thank's bro U have done the hard work by coding this fish :)

Core's CORE´s Ofiicial Crackme by eGIS!

Download core.zip, 59 kb (password: crackmes.de)
Browse contents of core.zip

Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 2880

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by Amenesia, published 06. aug, 2003; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

dragonuv 27. Oct 2009	I dont think the crackme and the solution match, in ollydbg it brings me to address 0424xxx whereas in amnesia's solution it shows 00401xxx

CoSH's Crackme 1

Download cosh1.zip, 5 kb (password: crackmes.de)
Browse contents of cosh1.zip

CD-Check

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 2322

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by barcode_, published 14. mar, 2003; download (2 kb), password: crackmes.de or browse.

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by obnoxious, published 16. jun, 2008; download (131 kb), password: crackmes.de or browse.

obnoxious has not rated this crackme yet.

Solution by Jim~, published 16. jun, 2008; download (21 kb), password: crackmes.de or browse.

Jim~ has rated this crackme as quite nice.

Discussion and comments

Jim~ 11. Jun 2008	Writing up a solution right now. Definitely not level 3 :)
costy Author 11. Jun 2008	so fast?? Probably the easyest crackme I have ever written. I made it because i wanna see how it's possible to enable a button in a net application. Anyway Jim~ some times ago You cracked another crackme of mine "Bitmap creator". So you have a good skill.
PrincessJade 11. Jun 2008	done :) was a nice 5 seconds of fun or 0000000005 seconds
obnoxious 12. Jun 2008	Princessjade you cdnt be any less specific;). Nice 1 costy it finally made me study try n catch exceptions
costy Author 12. Jun 2008	Yes... There is the possibility to generate an exeption if the user doesn't type a number. It could be a good idea to write a solution explaining what an exception is and ho it works or how to reconize it with reflector or another tool.
simonzack Moderator 12. Jun 2008	nice :) spaces work as well there other chars?
costy Author 12. Jun 2008	yes... zeros, spaces. have you tried someting like 5.00000000 (look at the dot)
obnoxious 13. Jun 2008	costy just uploaded a tut with the things that you wanted. ;)
obnoxious 13. Jun 2008	he he costy what about my skills ;)
costy Author 13. Jun 2008	@obnoxious good skills.
Alexak92 06. Jul 2008	Hey guys im a neww bee what software should i use?
costy Author 06. Jul 2008	Hello Alexak92 I suggest you to start with http://www.crackmes.de/users/w02057/ultimate_kit_for_newbies_all_tools_included/ all tools included

costy's Anti-Reflector Crackme By Costy

Download anti-reflector_crackme_by_costy.zip, 9 kb (password: crackmes.de)
Browse contents of anti-reflector_crackme_by_costy.zip

Sorry for my English.

You have to find a valid serial without patching.

The check routine is easy but NET Reflector can't load the routine correctly. You need to use another tool.

The difficulty is 4 becouse people usually use Reflector becouse it's user friendly... but now it's impossible to use it.

If Reflector works on your pc please specify witch version works.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 16. Jun, 2008
Downloads: 419

Rating

Votes: 4
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by MACH4, published 21. jun, 2008; download (701 kb), password: crackmes.de or browse.

MACH4 has rated this crackme as quite nice.

Solution by BeatriX, published 21. jun, 2008; download (172 kb), password: crackmes.de or browse.

BeatriX has rated this crackme as nothing special.

Discussion and comments

BeatriX 16. Jun 2008	Reflector 5.1.2.0 works nearly perfectly on this target...maybe you forgot something ? in 2 minutes, the crackme is solved
Ox87k 16. Jun 2008	However the trick works fine with Reflector 5.1.1.0..
Ox87k 16. Jun 2008	Sorry for my double-post but BeatriX... i upgrade my reflector to v5.1.2.0 and the trick works still fine. Maybe you have some plugin? I mean only IL diasm works (btw this one also with 5.1.1.0)
Ox87k 16. Jun 2008	LOL, solved! XD
costy Author 16. Jun 2008	Sorry guys. I have "Lutz Roeder's .NET Reflector 5.1.2.0". Infact I wrote the protection and tested it on Reflector 5.1.2.0. When I click on the Button1_Click routine inside Reflector I have an error. This is what Reflector says : Bug Report for .NET Reflector 5.1.2.0 [Please describe what might have caused this error.] Translation failure in 'Anti_reflector.Form1.Button1_Click(Object, EventArgs) : Void' in 'Anti-reflector, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. System.InvalidOperationException InnerException: Expression stack is empty at offset 00B5. System.InvalidOperationException in ឺ.ᜀ() in ឺ.᜘() in ឺ.ᜊ(Int32 A_0) in ឺ.ᜋ(Int32 A_0) in ឺ.ᜂ(Int32 A_0, Int32 A_1) in ឺ.ᜀ(IMethodDeclaration A_0, IMethodBody A_1) in ឤ.ᜀ(IMethodDeclaration A_0) in ឥ.ᜁ(IMethodDeclaration A_0) in ᝎ.ᜀ(Boolean A_0, Boolean A_1, Boolean A_2) .NET Reflector 5.1.2.0 .NET Framework 2.0.50727.1433 Microsoft Windows NT 5.1.2600 Service Pack 2 Culture: it-IT (it-IT) [AddInManager] "C:\Documents and Settings\costy123abc\Desktop\tools\NET Reflector\addins\AutoDiagramer.dll" "C:\Documents and Settings\costy123abc\Desktop\tools\NET Reflector\addins\Reflector.FileDisassembler.dll" "C:\Documents and Settings\costy123abc\Desktop\tools\NET Reflector\addins\Reflexil.dll" [AssemblyCache] "%SystemRoot%\Microsoft.net" "%ProgramFiles%\Reference Assemblies" "%ProgramFiles%\Microsoft.net" "%ProgramFiles%\Microsoft Silverlight" [AssemblyManager] "%SystemRoot%\Microsoft.net\Framework\v2.0.50727\mscorlib.dll" "%SystemRoot%\Microsoft.net\Framework\v2.0.50727\System.dll" "%SystemRoot%\Microsoft.net\Framework\v2.0.50727\System.Xml.dll" "%SystemRoot%\Microsoft.net\Framework\v2.0.50727\System.Data.dll" "%SystemRoot%\Microsoft.net\Framework\v2.0.50727\System.Web.dll" "%SystemRoot%\Microsoft.net\Framework\v2.0.50727\System.Drawing.dll" "%SystemRoot%\Microsoft.net\Framework\v2.0.50727\System.Windows.Forms.dll" "%ProgramFiles%\Reference Assemblies\Microsoft\Framework\v3.5\System.Core.dll" "%ProgramFiles%\Reference Assemblies\Microsoft\Framework\v3.0\System.ServiceModel.dll" "C:\Documents and Settings\costy123abc\Desktop\SpaghettiMe.exe" "%ProgramFiles%\Reference Assemblies\Microsoft\Framework\v3.0\System.Workflow.ComponentModel.dll" "%ProgramFiles%\Reference Assemblies\Microsoft\Framework\v3.0\System.Workflow.Runtime.dll" "%ProgramFiles%\Reference Assemblies\Microsoft\Framework\v3.0\System.Workflow.Activities.dll" "%ProgramFiles%\Reference Assemblies\Microsoft\Framework\v3.0\WindowsBase.dll" "%ProgramFiles%\Reference Assemblies\Microsoft\Framework\v3.0\PresentationCore.dll" "%ProgramFiles%\Reference Assemblies\Microsoft\Framework\v3.0\PresentationFramework.dll" "%SystemRoot%\Microsoft.net\Framework\v2.0.50727\Microsoft.VisualBasic.dll" "C:\Documents and Settings\costy123abc\Desktop\Copia di NewKeygenME.exe" "C:\Documents and Settings\costy123abc\Desktop\Crackme.exe" "C:\Documents and Settings\costy123abc\Desktop\Anti-reflector_by_Costy.exe" [LanguageManager] ActiveLanguage="Visual Basic" [WebProxy] Type="None" [WindowManager] X="157" Y="190" Width="391" Height="735" Pane="766" Maximized="true" The program asks me to send these informations to its author. I tried on another computer with the same version of reflector. Do you have another version of reflector? Do you have any plugin?? Explain better how do you make reflector works.
BeatriX 16. Jun 2008	ok ok ! Yes, I have solved this crackme by reading and interpreting the Intermediate Language given by Reflector because I have the same bug than you but... in the readme, I read "You need to use another tool". So, I understood that it was a complete anti-reflector trick (even for the IL option). I think Ox87k didn't use another tool to solve it. Anyway, it is a good trick costy !
Ox87k 16. Jun 2008	Yeah BeatriX, i thought this trick works because my reflector was on C# interpreter and i wrote my first post because i didn't try to change it! After the upgrade on v5.1.2.0 i changed it and finally i understand your first post because i did the same.. just understand few IL istructions and voilà.. ;) I didn't use any other tool! :P
BeatriX 16. Jun 2008	new game : modify 1 byte in Anti-Reflector to eliminate the naughty trick ! :)
costy Author 16. Jun 2008	WOW BeatriX you have understood how the trick works. Fill free to explain how to remove the trick... I thought that reflector can't show the code at all... It can't show the code in Visual Basic, C#, Delphi, MC++, Chrome... but it shows the code in IL. Anyway understand the code is much difficult. The code in IL is easy to understand but my trick is still good... infact i wrote an easy algo. A difficult routine would be much difficult to understand in IL. Anyway I focused my attention to the protection... I know that the algo is easy :-)
MACH4 16. Jun 2008	Yes nice one costy. very easy to break the protection using reflector and ildasm but nice to see the .NET crackmes getting interesting! @BeatriX Yes just one act to view the code! MACH4
PrincessJade 17. Jun 2008	can i get recognition since my crackme (which was rejected) inspired this one? lol
simonzack Moderator 17. Jun 2008	Both challenges done! @BeatriX you encouraged me to look at why it was not user-friendly
costy Author 17. Jun 2008	I have to say that this crackme was inspired by another crackme made by PrincessJade... her crackme was interesting... I patched her executable and noticed that sometimes reflector fails to load the code in Visual Basic format or c# format after the code is modified with reflexil... I decided to make this crackme focusing my attention to this reflector bug. The problem is that is still possible to see the source in IL format :-( but It's more difficult.
BeatriX 17. Jun 2008	PrincessJade, good job and costy, thanks for investigation and sharing. In fact, this idea is not new in the binary protection. I just play in the same manner with other opcodes and.... even IL display mode is in a bad mood : you can read nearly nothing with any display mode. That's really funny ! :)
costy Author 17. Jun 2008	Excuse me BeatriX can I know what have you exactly done?? I appended 2 extra command with reflexil at the end of the routine. This 2 extra commands where never executed but they give problems for reflector. How can you disable the IL display mode??
BeatriX 17. Jun 2008	héhé :) Listen costy, maybe you can try to code another crackme and insert these good jokes ;) I tell you in private what it is exactly.
MACH4 17. Jun 2008	costy, Your giving too much away! MACH4
costy Author 22. Jun 2008	2 good solutions. You have understood the trick. BaetriX why is the crackme nothing special??
MACH4 22. Jun 2008	well I thought it was interesting, else I wouldn't have bothered with a solution! lol Don't think it was level three though, maybe 2! All depends how much your interested in the unpacking-deobfuscating side of things!
BeatriX 22. Jun 2008	huhu :) I have rated your crackme as "just ok" because we can solve it in 2 minutes. The trick is funny but not really strong (IL disasm works) and the verification routine is not terrible :) Rated "just ok" is translated as "nothing special"... I don't think there is nothing special, I never said such a thing ! MACH4 is right : if we write a solution, that means we found some interest in the analysis. @MACH4 : nice solution :)
costy Author 22. Jun 2008	ok ... I understood. I will try to imporve the next one with your suggestions BeatriX
MACH4 23. Jun 2008	@BeatriX Thanks mate! I thought yours was better than mine! Clear and a much smaller file size, nice to see an alternative way also! @costy Don't get upset, there was nothing wrong with your crackme, I've seen hundreds worse! at least you come up with interesting ones with fresh ideas. If it wasn't for you guys, I'd be sitting here bored having to get on with RL. lol
DigitalAcid 23. Jun 2008	If you're bored of RL, you've got some issues :P.
MACH4 23. Jun 2008	haha! Too many interests and too many hobbies! Nice to sit down at the computer after work and see the latest postings here!

costy's Balls by COSTY

Download balls.zip, 4 kb (password: crackmes.de)
Browse contents of balls.zip

You have to put the balls in the right boxes.
That's all.

You can not patch the exe.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 03. Jul, 2008
Downloads: 625

Rating

Votes: 6
Crackme is boring.

Rate this crackme:

Solutions

Solution by sd333221, published 07. jul, 2008; download (91 kb), password: crackmes.de or browse.

sd333221 has not rated this crackme yet.

Solution by Zaphod, published 07. jul, 2008; download (192 kb), password: crackmes.de or browse.

Zaphod has not rated this crackme yet.

Solution by Xspider, published 07. jul, 2008; download (34 kb), password: crackmes.de or browse.

Xspider has rated this crackme as awesome.

Discussion and comments

costy Author 04. Jul 2008	Have you tried it? What do you think about?
DigitalAcid 04. Jul 2008	Well, you could have chosen a less perverted name :).
costy Author 04. Jul 2008	Sorry if i hurted you. :-)
Zaphod 04. Jul 2008	It is very easy to solve by trial and error. THINKING a solution might be quite another thing...
costy Author 04. Jul 2008	Excuse me... If you wanna solve by trial and error, it's still needed a bit of analizing. The possibilities are 10! = 1098765432*1 = 3628800. I don't think you can solve this only by trial and error. If you founded the solution you analized the code a bit. So post a solution. :-D
Zaphod 04. Jul 2008	Of course, costy, you are right, what I meant to say was "...by trial and error with the help of Olly". What I did isn't worth writing a solution about. Instead I'm trying to find out what the function "__vbaFpR4" does, but I cannot find an explanation anywhere. And I know VERY little about Visual Basic...
costy Author 04. Jul 2008	@Zaphod Any solution is acceptable :-D
DigitalAcid 04. Jul 2008	@Zaphod: It's probably something with floating point...
Zaphod 05. Jul 2008	OK, I'll write a short solution, consisting of 5 seconds of analysis and 5 minutes of trial and error, then we'll see if "any solution is acceptable" :)
Zaphod 05. Jul 2008	@DigitalAcid: You are probably right about the floating point, but it is strange that I cannot find an explanation about a Visual Basic-function...
Zaphod 05. Jul 2008	Solution submitted:)
MACH4 05. Jul 2008	@Zaphod, Nothing surprises me with the msvbvm60.dll You have to disassemble it to understand what the functions are doing! r4 refers to real4 and fp is short for the fpu stack
costy Author 05. Jul 2008	msvbvm60 is the reason why people hate vb crackmes. I think that Microsoft has no reason to document this library.
costy Author 06. Jul 2008	So guys it isn't so difficult Why nobody write a solution??
TiGa 06. Jul 2008	costy, please stop harassing the members. They will write a solution if and when they want to.
costy Author 06. Jul 2008	Sorry Tiga... and sorry members. Next time i will be patient.
sd333221 07. Jul 2008	Solution added :-)
costy Author 07. Jul 2008	@Xspider I'm happy you liked it. I hope to do some more difficult crackmes. <Just a bit more difficult :-)> Anyway I don't understand how you understood that the shape1(1) must be placed in the shape2(1) shape1(2) must be placed in the shape2(2) shape1(3) must be placed in the shape2(3) ... shape1(10) must be placed in the shape2(10). You only explained how you understood witch index has the red shape, the blue one... Could you explain better??
Xspider 07. Jul 2008	will when you put them all together you will see that the last own [orange shape] is the 1st and 1st [Red] is the last!! sorry 4 my bad english!
sd333221 07. Jul 2008	Me and Zaphod took the identical way :-( Didn't have to write a solution if I knew it
GENNADY22 25. Jul 2008	Very good crackme :)

costy's COSTY's Second Crackme - Crack this Bitmap Creator

Download COSTY__s_SECOND_CRACKME.zip, 7 kb (password: crackmes.de)
Browse contents of COSTY__s_SECOND_CRACKME.zip

Costy's Second Crackme
Crack this bitmap creator.

EXCUSE ME FOR MY ENGLISH.

Written in Visual Basic 6

This crackme is offered without any warranty.
Use it at your own risk.

This program writes bitmap on the hard disk.
Pay attention to overwrite existing files.

The crackme is a simple bitmap creator.
You can draw with your mouse the picture area but when
you save the file it will show a watermark.

Modify the program as it will save images without any
watermark.

Then you can write a tutorial and post it on crackmes.de

I hope you also try my first crackme.
My first crackme is more funny.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 30. Apr, 2008
Downloads: 472

Rating

Votes: 3
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by Jim~, published 17. may, 2008; download (15 kb), password: crackmes.de or browse.

Jim~ has rated this crackme as nothing special.

Solution by DigitalAcid, published 17. may, 2008; download (53 kb), password: crackmes.de or browse.

DigitalAcid has not rated this crackme yet.

Discussion and comments

DigitalAcid 11. May 2008	Hmm, is this one even possible to solve ? 8-) I can patch the "Demo" picture, but that's like aesthetic patching...
costy Author 12. May 2008	In the crackme there isn't any registration routine. So you have to patch. What do you mean with a <patch the "Demo" picture>?? Anyway you can patch it as you like.
DigitalAcid 12. May 2008	Well, i had patched it so the picture was white, so you still couldn't draw anything at that area. Really, i have no idea how to solve this in another way, because everything is done through the MSVBVM or another dll. Now i patched it in another way so you can draw anything in that area. I have uploaded a solution.
costy Author 12. May 2008	I hope you had not reduced Demo picture size... But If can not find other way I can accept this solution. Have you tried to set a breakpoint on picture data??
DigitalAcid 12. May 2008	Yeah, reducing the picture size is what i did =). I put a BP at the start of first picture byte and some other things, but i really can't find where to make it skip writing the demo picture inside the crackme itself... Patching outside of the crackme (MSVBVM or whatever) didn't really work either.
costy Author 12. May 2008	Hello Digital Acid... 1) Why not make a little of code ingection. Write a dll that saves picture to files then make the program call this dll. It's possibile. Call GetActiveWindow to find the crackme form Call EnumWindows and GetClassName to find the handle of the picture box Save picture to file using a bit of grafic function. 2) Demo picture is painted in the left bottom corner... Make the program paints this picture outside the picturebox area. It's really difficult. Probably I have to change difficulty
DigitalAcid 12. May 2008	Well, i can't really program stuff like that. About point 2, it's in the top left corner (the picture is also hidden inside the crackme) and i thought about that idea, but can't find it or don't know how to do that =).
MACH4 13. May 2008	well I'm useless at VB6 so will look forward to any tutorials on it...
costy Author 13. May 2008	Yes, it is in the left top corner. My English is bad and i wrote "left bottom corner". My mistake. Picture isn't hidden. You can see it with vbreformer. It's inside a picture box : picture2. This picture box is invisible. propriety visible = false.
costy Author 17. May 2008	good! Jim~ and DigitalAcid founded an identical solution. WOW
DigitalAcid 17. May 2008	Lol, we didn't cheat :P. I don't know him at all lol. I would like to see another solution though...
Jim~ 17. May 2008	Haha. Nice. Yeah, I gave up modifying the executable after a few tries. Maybe I need to spend some more time taking a harder look at it...
DigitalAcid 17. May 2008	That's what i tried at first, but finally i had to use this approach too =).
costy Author 18. May 2008	I'm waiting someone who solve my crackme paching the code.

costy's EnableME

Download enableme.zip, 3 kb (password: crackmes.de)
Browse contents of enableme.zip

Try to enable it.
But if you enable it the program does't want to start.
Any solution is valid.
You must patch it.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 08. Jul, 2008
Downloads: 905

Rating

Votes: 4
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by Xspider, published 11. jul, 2008; download (417 kb), password: crackmes.de or browse.

Xspider has not rated this crackme yet.

Solution by simonzack, published 10. jul, 2008; download (7 kb), password: crackmes.de or browse.

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Solution by br0ken, published 10. jul, 2008; download (1093 kb), password: crackmes.de or browse.

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Solution by xylitol, published 10. jul, 2008; download (1453 kb), password: crackmes.de or browse.

xylitol has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

Bispoo 09. Jul 2008	Solved, will write and post solution soon... As always, VB crackmes are really easy :)
MACH4 09. Jul 2008	Won't upload a solution for this (to easy) but, can you explain what you meant by; 'But if you enable it the program does't want to start.'?
Bispoo 09. Jul 2008	Thats easy MAch4, if u analyse the code on a certain procedure theres a check, and if it fails the program crash... thats what he meant. :)
MACH4 09. Jul 2008	Well all i did was enable the button and it ran ok!
br0ken 09. Jul 2008	Maybe author should have used JMP instead of CMP -> JNZ?
costy Author 09. Jul 2008	@Everybody I modified the program with Vb Reformer 3.9 Free in order to enable the button. The modified version crashes on my pc. Ok I wanna be onest. I made a simple program with VB with a disabled button. Then I enabled the button with Vb Reformer 3.9 Free Edition. I compared the two different exe. One byte is different. So I add a test: If the byte is modified it should crash. I think MACH4 used a different version of Vb Reformer and something doesn't work. @Bispoo You founded the check. So can you write a little solution about it. Have you used Vb Reformer?? What version?? @br0ken Could you explain better?? I manualy added some code in asm to the crackme. This extra code performs the check. I think there is no error in my code.
xylitol 09. Jul 2008	juste change '0' by a '1' in hexa code and the buton is ok...
MACH4 09. Jul 2008	@costy No error in your code! Saving a binary with some tools seem to alter some code and the check fails, That's all I can think of for now! It could be related to using inline asm in vb programs, I'm not sure!
Bispoo 09. Jul 2008	@costy , i sent you a message on how i've done it :) i didnt use vb reformer
costy Author 09. Jul 2008	@Bispoo I don't understand why your solution wasn't approved. @Moderators Could you explain why Bispoo's solution wasn't approved?? I think it's ok. It enabled the button and than removed the check. ???????
br0ken 09. Jul 2008	Yes, i realised this now. MACH4 is right. Using JMP will not start the cme at all. Silly me :P Maybe cme modified with vbreformer higher than v3.9 will have value 0 instead of 0xFF (in my case). That's probably why the check fails if you use versions above 3.9.
Bispoo 09. Jul 2008	@costy My solution wasnt approved because i dont explain that good what i do, you might understand it but other people don't, i have to explain 'why' i do it , and not how i do it :)
TiGa 10. Jul 2008	costy is complaining, again, what a surprise. The person who gets his solution rejected is explained the reasons why. It's not necessary to explain those reasons publicly every time.
simonzack Moderator 10. Jul 2008	solution sent, waiting for approval
AloneInTheDark 10. Jul 2008	Sorry for question , but i modified the program with Vb Reformer 3.9 Free in order to enable the button, but the modified version crashes on my pc. Where I can find other version of Reformer ? Tnk
costy Author 10. Jul 2008	@AloneInTheDark It's not necessary to downlaod a new version of Vb Reformer. Just find the check and patch it.
obnoxious 10. Jul 2008	i cant seem to use vbreformer. each time i open an exe in vbreformer i get an error msg "pas unexecutable vb4-5-6"
AloneInTheDark 10. Jul 2008	Hi costy, with ollydbg ? It is good for Visual Basic? tnk
MACH4 10. Jul 2008	Hey costy,Why don't you change the rules! Increase the difficulty by one and change the solution to explain why solution don't work! ;-) Anyway, I think I found whats happening, VbReformer is mis-reading the in-line asm so the check doesn't get performed on that byte. it also creates several other changes in the new file it compiles. Hex programs are more clinical and only changes the bytes without recompiling.
DigitalAcid 10. Jul 2008	I'm using VB Decompiler Lite 0.4 and it works. It does what it says, decompiling :). Weird, when I remove the check, it gives an exception after showing a "nag" that wasn't there before O.o.
AloneInTheDark 10. Jul 2008	@DigitalAcid Tnk for suggestion :)
AloneInTheDark 10. Jul 2008	@DigitalAcid I have try VB Decompiler Lite 0.4 but where I can change property of Commond1.Enabled .... ? tnk
MACH4 10. Jul 2008	Well, I made two identical dialogs, one with the button enabled and one without, then in winhex did a binary compare and there are many differences between them! @costy how did you only find one byte difference?
xylitol 10. Jul 2008	@M4XH4 you just need HexDecCharEditor (or another hexa editor) VB Decompiler Pro HDB Converter (or calc.exe) in VB Decompiler, Enabled = 0 'false look the height you have for example '1337' convert it to hexa you have: '539' reverse it you have 39 05, search in the editor hexa the bouton name 'enable me and click me' search your '39 05' and normaly you see after '00' just remplace by '01' save as.. ho yeah the bouton work 8) vb reformer is only for win speed, like the 'old' method
MACH4 10. Jul 2008	@xylitol, tnks for the explanation, yes i know! What I was trying to get at is that a modified file saved with different tools produce quite different binaries! So the injected asm test ends up pointing to some irrelevant byte. Still don't know why! damned vb6...
costy Author 10. Jul 2008	@ obnoxious Are you sure you are opening a vb application? it'strange that vb reformer says "pas unexecutable vb4-5-6". Anyway my crackme is a 99% Visual Basic pplication + 1% asm manually added in the compiled file. My Vb Reformer open it correctly. @ AloneInTheDark Yes. OllyDbg is ok. There are some kind of debugger like SamrtCheck for Visual Basic Application but It is not so usefull with this crackme becouse the check is added manually in asm in the compiled exe. @MACH4 I don't want to change the rules becouse some peole surely have already posted a solution. I hope that sometimes explain the check in the solution to help less experienced crackers. @DigitalAcid The NAG?? Ah! I understood!! I added the check in asm in the crackme. I needed some space to put the check so when I compiled the crackme in the form1_load there is MsgBox(something). So the compiled unmodified exe will display the message box. I removed the message box to put the check in asm. Now with your modification it seems that the Message Box is still alive. :-) @ MACH4 I made a version the version with the disabled button. Then I modified this version with Vb Reformer 3.9 Free. Only a byte change. I think if you use another tool there can be a lot of differences.
Xspider 10. Jul 2008	i was late :'(
spawnermax 12. Jul 2008	hi,my first vb solved...nice ;)

costy's EnableMe 2 - The Revenge :-/

Download enable_me_2.zip, 5 kb (password: crackmes.de)
Browse contents of enable_me_2.zip

My last Crackme "EnableMe" was easyly solved. :-(
Now... This is my revenge.

Rules : nothing.

Enable that button.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 11. Jul, 2008
Downloads: 461

Rating

Votes: 4
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by Bispoo, published 15. jul, 2008; download (316 kb), password: crackmes.de or browse.

Bispoo has rated this crackme as nothing special.

Discussion and comments

xylitol 11. Jul 2008	i'm surprised by the buton
costy Author 11. Jul 2008	@xylitol What do you mean with "i'm surprised by the buton" Problem with anti-debugging?
DigitalAcid 11. Jul 2008	I get an exception in Olly, more than 1, I think =). Probably because it's somehow dividing by zero. Else, I get runtime errors, etc. O.o.
costy Author 11. Jul 2008	@DigitalAcid It works correctly if you dont run a debugger :-)))
MACH4 11. Jul 2008	Ha! Nice one costy! interesting method, if I'm right then 'Needs special knowledge' certainly applies to this one. Trying to completely RE it, need to do some reading!
costy Author 11. Jul 2008	@MACH4 I'm very very sad. :-( So can you reverse it? I hoped this crackme was more difficult then my last one!
MACH4 11. Jul 2008	@costy, Don't be sad! I haven't RE it completely yet, almost there! and it IS more of a challenge than the last one. Ok I won't give any hints! Don't want to spoil it for others!
costy Author 11. Jul 2008	OK I dont want to help you becouse you resolved my last one in a second. Have you ever seen the anti-dbg I used??
MACH4 11. Jul 2008	Yes, nice:-) Added text here for the post to be accepted
costy Author 11. Jul 2008	It's strange you have already seen it... It's really rare. Does the crackme work inside the debugger now??
MACH4 11. Jul 2008	Well, yes it works in the debugger, although I have a small item (PTR) to find and correct...
costy Author 11. Jul 2008	PTR???? What is it?
Bispoo 11. Jul 2008	Solved, button enabled, :) nice crackme, a little harder this time too, took an additional 5 minutes :p
Xspider 11. Jul 2008	i think i will try it :D
costy Author 11. Jul 2008	@Bispoo Only 5 minutes?? Are you sure??
Bispoo 11. Jul 2008	Sent u a PM costy.
costy Author 15. Jul 2008	@Bispoo Nice Solution. Anyway It's better to explay the outputdebugstring trick. outputdebugstring let the programmer to display a string in the debugger. it's prototype is void OutputDebugString (char string1);. If you declare it as int int OutputDebugString (char string1); it will return 1 if there isn't a debugger. A value different then 1 if the debugger is present. Nice anti-debugger. Anyway I hope that somebody will invent a plugin for olly that remove this problem. Bye
obnoxious 15. Jul 2008	@bispoo gr8 tut man!!!!!!!!!!
apuromafo 19. Jul 2008	nice tut 00401CDC -> ctrl+r is other form to find without find with ret :) the other way and all very good nice solution, is similar only the difference is this direction :) now must wait some day to solve the RDG crackme..thats have a lot of dll funtion..

costy's Find the valid number.

Download costy_crackme_n3.zip, 27 kb (password: crackmes.de)
Browse contents of costy_crackme_n3.zip

You have to find a valid number.
No patching.
Bruteforcing allowed.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 14. May, 2008
Downloads: 2010

Rating

Waiting for at least 3 votes
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Solutions

Solution by MACH4, published 21. may, 2008; download (1147 kb), password: crackmes.de or browse.

MACH4 has not rated this crackme yet.

Solution by br0ken, published 21. may, 2008; download (7 kb), password: crackmes.de or browse.

br0ken has not rated this crackme yet.

Solution by Grubci0, published 21. may, 2008; download (3 kb), password: crackmes.de or browse.

Grubci0 has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

DigitalAcid 14. May 2008	Nice and easy :).
costy Author 15. May 2008	Good! DigitalAcid it seems you are solving all my crackmes. But I am still waiting for the solution to COSTY's Second Crackme - Crack this Bitmap Creator :-)
DigitalAcid 15. May 2008	Hehe, your crackmes aren't that hard yet :P. I won't write a tutorial for this one, because i'll probably need to include a keygen =) (i made it partially selfgen). The solution of your Bitmap Crackme is still in queue, but i don't know if it will be a valid solution.
costy Author 16. May 2008	A keygen isn't needed. There is no possibility to find a valid number without bruteforcing. <REALLY IMPOSSIBLE> If you want more information i'm am on msn costyn1@hotmail.it. I don't want to explain the crackme here... :-)
DigitalAcid 16. May 2008	Well, the bruteforcer would be the keygen :D. If only i could show the correct number in the crackme. Now it only shows the goodboy message after calculating the right number. I didn't patch, i made an inline bruteforcer ;). Maybe this week-end i'll write a tutorial then.
costy Author 16. May 2008	If you modified the exe file to do a self bruteforce... it is not patching but PROGRAMMING. So it is a good solution. To show the number inside the crackme you can call SetDlgItemInt. It is strange I help people to crack my program. :- ))
DigitalAcid 16. May 2008	I tried the SetDlgItem, but the value is in hex. Also, i need to find the right handle first because there are several GetDlgItems ;).
Grubci0 16. May 2008	Nice crackme. :) algo for serial is simple. I made solution and something like keygen day ago. Now waitin for moderator.
xylitol 16. May 2008	There is no possibility to find a valid number without bruteforcing Impossible Is Nothing
Rezert 16. May 2008	lmao. this is hard. i dunno why it's 1...or maybe im just an idiot? it's probably the latter. i just started OllyDbg the other day. lol. anyways, i can patch most things easily but can't do the whole find the number thing
Grubci0 17. May 2008	keep it going ;) algo is just a few lines. i can say there is many good numbers. still waiting :p
obnoxious 17. May 2008	Eh! Do we really need to bruteforce this baby. It was pretty simple a number of valid numbers between 10000000-99999999 can be found!
DigitalAcid 17. May 2008	@obnoxious: not every number is valid :).
obnoxious 17. May 2008	@ DigitalAcid I never meant all numbers are valid. I meant a specific few or better still a specific kind. ;)
Grubci0 17. May 2008	Bad luck, i haue send damaged archive with my solution (mod cant open it). i will haue access to my pc at monday and then will send again, to author too.
costy Author 17. May 2008	There are a lot of valid number. I don't understand DigitalAcid's problem. You have to use SetDlgItemInt passing the same handle used with GetDlgItemInt. What are you saying about SetDlgItem?? You should use SetDlgItemINT **INT** Bye....
costy Author 17. May 2008	just a little help 10000019 is valid
DigitalAcid 17. May 2008	Yeah, that's the first number my bruteforcer found :P.
costy Author 18. May 2008	REVERT. Difficulty is 1 for me, but you could have a problem with this becouse it's a math joke.
Grubci0 18. May 2008	MODULO joke i can say... ;) ok im at comp, will send new solution ;)
costy Author 18. May 2008	I don't know what modulo means in English. I tried to find it in the dictionary. There isn't.
DigitalAcid 19. May 2008	I think he means "modulus" a.k.a. "mod".
Grubci0 19. May 2008	no i mean modulo dividing ;)
DigitalAcid 19. May 2008	Same thing =). Some random text here because short message don't work O.o.
costy Author 19. May 2008	Yes same thing. DigitalAcid invented a trick to write short messages adding "Some random text here because short message don't work O.o.". He cracked crackmes.de site. :-)
Grubci0 19. May 2008	:))) congratulations
obnoxious 19. May 2008	Eh! No solutions for this 1 as yet.
DigitalAcid 19. May 2008	Don't worry, i'm sure there are some solutions waiting ;).
costy Author 19. May 2008	There are a lot of people waiting. DigitalAcid did you send a solution??
MACH4 19. May 2008	Just done one, will upload later MACH4
costy Author 20. May 2008	Good Job MACH4 Some random text here because short message don t work O.o
DigitalAcid 20. May 2008	Yes, i uploaded a solution. Included a bruteforcer.
MACH4 20. May 2008	brute force for a single valid number or a small range of test numbers works ok. Trying to get all valid numbers in the range of 10000000 to 99999999 would take appx 8.9E14 loops or in real terms something like 137 years. Thats why I don't like brute force crackmes but this one is much easier because of the many valid numbers!
MACH4 20. May 2008	Also interesting is the amount of cpu usage, mine is 64 bit but in xp is firing only on one cylinder. so a full 50% usage...
costy Author 20. May 2008	I think that this will be the crackme with the greatest number of solution. Nice record :-))))
obnoxious 20. May 2008	mach4 if u think the range from 1000000-99999999 is huge just think i made my bruteforcer to find all nos frm 1-99999999
costy Author 20. May 2008	What are you doing Obnoxious??? Valid numbers must be greater then 10.000.000
obnoxious 20. May 2008	yeh i know man it was just for fun. i can specify an input range that the bruteforcer can start with. so i can use a starting number between 1-9999999 as i like.
costy Author 20. May 2008	Yes... I suggest you to start from 10.000.001 :-D
obnoxious 20. May 2008	ah! guess u forgot i told u what logic ur crackme was applying in p.m. so really i dont have to brute force it to find valid serials i just made a brute forcer as every 1 else was doin it ;-)
costy Author 20. May 2008	I don t forgot. :-D I'm joking. I suggest doing a competition. Who will program the fastest bruteforcer??
DigitalAcid 20. May 2008	I think we all will have the same speed of bruteforcer. After all, it's only increasing our input and looping through the algo over and over and over and over, and over. Ps: i want to see those crackmes in queue =P. I'm bored atm.
costy Author 20. May 2008	I don't think so there are some math algoritmics to find THAT type of number...
obnoxious 21. May 2008	oH! costy ther are a number of algos that can find that kind of numbers n they are pretty fast. they can generate upto 1billion within a minute. check this site out i will send u the link in p.m
obnoxious 21. May 2008	did any1 verify the serials generated by the brute forcer. in my case 1 or 2 invalid serials pop out continually. :( cant figure out why.maybe its the same for all!!!!!!!
DigitalAcid 21. May 2008	Yeah, i encountered 2 invalid serials when i bruteforced some with Olly. It's allways the same invalid one. I noticed it must be something with the stack. Unfortunately i didn't save them.
costy Author 21. May 2008	So... is the problem inside my crackme?? Or is it inside the bruteforcer. If the numebers are invalid you can post it on crackmes.de without problems.
costy Author 21. May 2008	Anyway I'm going to publish the source when the first solution will be accepted.
MACH4 21. May 2008	can you post a couple of invalid numbers you found! I will check them here...
obnoxious 21. May 2008	here r the invalid serials. sorry the r in hex i cd make my bruteforcer to show hex values instead of decimal. 9896cd 9896d7 9896d9 after these there were valid serials but i guess invalid numbers will pop up continually.:=0
MACH4 21. May 2008	Thanks for the numbers, no they are all invalid here. Must be something wrong with your bruteforcer 9896cd = 10000077 = invalid 9896d7 = 10000087 = invalid 9896d9 = 10000079 = invalid There are 2 valid numbers in the lowest 100 & 6 valid numbers in the 100 to 200 range maybe you need to zero some registers after each loop...
DigitalAcid 21. May 2008	Weird, the first 2 are invalid for me, but the last one is valid for me. And yes, don't forget to zero the CCCCCC01 ;).
MACH4 21. May 2008	sorry, yes that third number is one of the two valid ones in that range! I wasn't concentrating! lol
obnoxious 21. May 2008	yes sorry found the problem with my prog. will fix it now n re upload my tut. thanks!!!!!!!!
costy Author 21. May 2008	I don't know why the compiler used CCCCCC01. It's only a flag so it can be rapresented by one byte.
obnoxious 21. May 2008	my brute forcer is working properly.No probs now only valid serials are generated.;)
MACH4 21. May 2008	I think the compiler does that, computer can only use DWORD's so say if you used "push ax" (in the 32bit world) the compiler would push a DWORD to keep the stack balanced, Stack and heap are just memory so no doubt applies to your reserved BYTE as well, so you end up with the full register content...
DigitalAcid 21. May 2008	Well, it was CCCCCC00, but you only moved 1 byte (a 1) in there, so it became CCCCCC01. If we don't reset it ourself, our bruteforcer will never find a valid number ;) (Except if the first one is valid of course). Lol, i bet there are like 7 solutions for this one :O. Mod will have a hard time choosing wich ones to accept (pun intended :P).
MACH4 21. May 2008	Don't forget that the following "AND" removes the C's before the test.. Anyway, I'm looking at So;x dos Crackme now, haven't done that stuff for years...
obnoxious 21. May 2008	no no it was not that i had forgotten to code some lines that set E&f. so instead of getting 9896cf i kept getting 9896cd
costy Author 21. May 2008	Firts solutions arrived. They are really fine. I hope to read many others solution. I'm happy becouse a lot of people liked this crackme.
TiGa 21. May 2008	If all the solutions were approved as soon as they came in, the first one would accuse the others of cheating if their solution was slightly similar to his. It also allows people to revise and improve their solutions.
DigitalAcid 21. May 2008	Hmm, mine got rejected, but the bruteforcer works fine. It only shows the valid serial after the goodboy, after clicking the OK button...
obnoxious 21. May 2008	alas! my soln got rejected to made some stupid mistakes. but m undaunted n have uploaded anew version with all fixes as asked by tiga ;). m hoping n waiting
TiGa 21. May 2008	Self-bruteforcers are not allowed. It is considered as patching. For any crackme, we don't put much value in solutions that include patching, especially if other solutions were submitted that don't include patching. This place is about learning new things, not repeating the same fishing or patching recipe to every level 1 crackme as soon as it comes in. We don't have to approve every solution that comes in. We pick only the better ones, it is about quality, not quantity or speed.
costy Author 21. May 2008	Please send invalid solution to costyn1@hotmail.it. I'm curious.
costy Author 21. May 2008	MATH 4 analized my crackme in PEiD and wrote in his video solution: "[DEBUG] means there will be a load of debug calls in there, which is probably left to cause confusion for us!". I don't want to cause confusion for anybody, I don't know what [DEBUG] means.
MACH4 21. May 2008	Hi costy, I only brought attention to it because I thought it was diliberately there to create some diversion from the important loop! I don't use visual C but suspect it is debug version (to help with debugging) until when its published, then the exe gets cleaned...
costy Author 21. May 2008	Yes I verified MACH4. It's true. Anyway the source is this one... // crackmetre2.cpp : Defines the entry point for the application. // #include "stdafx.h" #include "resource.h" // Global Variables: HINSTANCE hInst; // current instance LRESULT CALLBACK About(HWND, UINT, WPARAM, LPARAM); int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, 0, (DLGPROC)About); ExitProcess(0); } // Mesage handler for about box. LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam) { switch (message) { case WM_INITDIALOG: SendMessage (GetDlgItem(hDlg, IDC_EDIT1),EM_LIMITTEXT, 8,0); return TRUE; break; case WM_COMMAND: if (LOWORD(wParam) == IDCHECK) { int number; int number2; int resto; bool divisibile = false; number = GetDlgItemInt(hDlg, IDC_EDIT1, 0, 0); if (number > 10000000) { ShowWindow(GetDlgItem(hDlg, IDC_EDIT1),0); ShowWindow(GetDlgItem(hDlg, IDCHECK),0); ShowWindow(GetDlgItem(hDlg, IDC_WAIT),1); UpdateWindow(hDlg); for (number2 = number-1; number2 > 1; number2--){ resto = number %number2; if (resto == 0) divisibile = true; } ShowWindow(GetDlgItem(hDlg, IDC_EDIT1),1); ShowWindow(GetDlgItem(hDlg, IDCHECK),1); ShowWindow(GetDlgItem(hDlg, IDC_WAIT),0); if (divisibile == false) MessageBox (hDlg, "You win. Now write a tutorial :-)", "Champion!!", 0); else MessageBox (hDlg, "Invalid number!", "Error",0); } else MessageBox(hDlg, "Number should be greater then 10000000 ;-)", "Little Hint", 0); } break; case WM_CLOSE: ExitProcess(0); } return FALSE; }
costy Author 21. May 2008	some words are in italian resto = remainder divisibile = divisible about is the main (only) window I forgot to rename it.
souravipc53 14. Nov 2008	The Fact is that it is a prime nos. finding crackme. if you have any type of prime nos. findin software you can easily find out hundreds of prim nos. valid between 10000000 &99999999.

costy's FIRST COSTY's Crackme

Download crackmecosty1.zip, 14 kb (password: crackmes.de)
Browse contents of crackmecosty1.zip

Excuse me for my English.
I hope that you will enjoy this crackme.
It's written in Visual Basic and it could let you improve your skill with VB programs.
Also it isn't the standard name / serial crackme.
Have a look!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 20. Apr, 2008
Downloads: 540

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by DrPepUr, published 25. apr, 2008; download (67 kb), password: crackmes.de or browse.

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Discussion and comments

xylitol 25. Apr 2008	thank DrPepUr, I learned from your solution
costy Author 25. Apr 2008	Good job DrPepUr. I tought that someone would simply change the jump at 407919. Sorry for my English.
DrPepUr 26. Apr 2008	I got bored...figured it could apply to other things in VB
Zaphod 15. May 2008	costy, you say that the bird should arrive at the red line. I can patch so this happens, but the bird jumps back to the beginning over and over. Is it supposed to stay by the red line? I won't look at DrPepUr's solution yet...
costy Author 16. May 2008	Zaphod... do as you like. :-) It could be funny to stop the bird at the red line... In the DrPepUr solution the bird jumps back to the beginning over and over. I think that it's not so difficult to stop the bird if you want i will have a look. Contact me on msn costyn1@hotmail.it.
Zaphod 16. May 2008	No, it would not be hard to stop the bird at the red line, but it would take a little ( very little ) bit of programming. To let the bird reach the red line and jump back I just changed one byte, and I think I'll consider that a solution :)
costy Author 16. May 2008	Yes Zaphod It's exactly what DrPepUr did in his solution.

costy's FOUR ACES

Download poker.zip, 9 kb (password: crackmes.de)
Browse contents of poker.zip

Poker Crackme: you have to patch in order to get four (4) ACES. Each card can appear only ones. For example the program can't show two kings of heart.
Patching the program in order to show the message "POKER OF ACES!!" isn't a valid solution if you don't have four (4) ACES for real.

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 19. May, 2010
Downloads: 263

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by synak, published 25. may, 2010; download (1215 kb), password: crackmes.de or browse.

synak has not rated this crackme yet.

Discussion and comments

Xspider 20. May 2010	ouh looks like a nice one :D
obnoxious 20. May 2010	nice as usual :)
costy Author 20. May 2010	I think my crackmes have always something special ;)
Xspider 20. May 2010	yep they actually do :)
synak 23. May 2010	this was fun, thanks! i've got the successful msg after getting myself four different 1's (aces), but the criteria to ensure the cards only appear once (including the CPU's hand) is something I'll leave to someone else..:)
costy Author 24. May 2010	Continue practice synak!! Why don't you try to give to the CPU and to the player always the same cards? ;)
Xspider 25. May 2010	hhhh you made it show more than 7 aces :p nice solution synak ;)
costy Author 25. May 2010	I just finished to read the solution you posted privately and now it's published. It's a good solution. I hope you explain it better to me. ;)
synak 27. May 2010	I got a little lazy and didn't explain how I knew EBP-18 was the current card count (1-10). Here is the additional detail: Shortly after the Rand() function is called, I noticed this: 0040BB0F MOVSX ESI,WORD PTR SS:[EBP-18] 0040BB13 CMP ESI,0B 0040BB16 JB SHORT 0040BB1E Ths is checking to see how many times the random card generation function has been called, compares it to 0Bh (11decimal), and jumps (continues generating cards) if we're still under 11. There are 10 cards in total being generated, so it was safe for me to assume that EBP-18 at this point in the code will contain the current amount of cards that have been generated so far. Knowing that, I used EBP-18 instead of writing code to do my own counting within the code cave.

costy's Image(?) and Serial

Download crack.zip, 6 kb (password: crackmes.de)
Browse contents of crack.zip

KeyGen Me - Image and Serial

by COSTY

The user must load an image.
The serial is generated from the image content.

The purpose is to create a keygen.

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 03. Mar, 2010
Downloads: 349

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by MACH4, published 03. mar, 2014; download (381 kb), password: crackmes.de or browse.

MACH4 has not rated this crackme yet.

Discussion and comments

T.0.R.N.A.D.0. 04. Mar 2010	Your crack-me accepts a "BLANK SERIAL" for some cases (when the whole image is composed of a single color) ! Fishing a serial was too easy .. trying to make a keygen now :)
costy Author 04. Mar 2010	Yes! fishing a serial is really really easy but the task is to keygen it. Some image have a "BLANK SERIAL": it's normal! It's not bugged!!!
obnoxious 05. Mar 2010	Hola costy buddy u are online?
T.0.R.N.A.D.0. 05. Mar 2010	I think that's a bug .. When you compare the entered serial (which is a string) with a floating point, vb will stop at the first non-numeric char in the serial. The blank serials are accepted because of this : when vb gets a blank string "" the equivalent numeric expression is "0.0". So, even if you enter "costy" or "T0RNAD0" "000xyz", they would be accepted !! In general, any serial starting with a non-numeric char (or "0" followed by non-numeric chars ) will be accepted ! (isn't that a bug) ?? Where as keys like "123" or "1T0RNAD0" etc will be rejected. Try this .. make an image out of a single color and enter the above serials.
costy Author 07. Mar 2010	@obnoxious: I'm back. ;) in Italy we say: chi non muore si rivede! About no see! @T.0.R.N.A.D.O That's not a bug! Some image have 0 as serial. When you type a serial VB try to convert it as a number. The conversion is made with val val(text1) If you enter "tornado" as serial the crackme executes serialtyped = val(tornado) tornado is not a number so VB put seraltyped = 0. Some image for example images with only one pixel have 0 as right serial. So "tornato" could be a valid serial. "House", "car", "computer" can be ok too. These words are converted to 0. "1T0RNADO" is converted to 1. "123star" is converted to 123. "&h11&" is converted to 17. VB thinks you typed an hexdecimal. An empty string is converted to 0. Infact you wrote 'your crack-me accepts a "BLANK SERIAL" for some cases'. There is no bug.
T.0.R.N.A.D.0. 08. Mar 2010	Yeah, i know what happens with val(), so i thought it's a bug (I thought you forgot 2 put a check after val()) .. Sorry ! :)
costy Author 08. Mar 2010	@T.0.R.N.A.D.0. I'm courious... have you got any idea about how the crackme works?
Xspider 08. Mar 2010	hi nice to see you are back costy :D
T.0.R.N.A.D.0. 09. Mar 2010	Yeah .. it reads the bitmap pixels and works with them. It then reads 2 bits from each RBG byte (except the last byte) and does something like : Serial += bit1 - bit2. I can manually crack the serial by reading the bits of a bitmap file ... but i find some problem in coding it .. the bit sequence doesn't appear as expected. :(
costy Author 09. Mar 2010	.. the bit sequence doesn't appear as expected. :(?? What do you mean?
T.0.R.N.A.D.0. 10. Mar 2010	I mean abt my keygen .. I get some problem reading the bits ... they don't appear the same as in the program dump.
Trevil 20. Mar 2010	Yeah, cracking it wasnt that bad, but my asm is, keep getting a message about my bmp files not containing any resource section.. (?) Nice work on the crackme tho, was different :))
Trevil 20. Mar 2010	@T.0.R.N.A.D.0. You keep getting 24bit sequneces?
costy Author 20. Mar 2010	The difficulty of this crackmes isn't to understand the code, the difficult part is to write a keygen.
T.0.R.N.A.D.0. 21. Mar 2010	@Trevil : Are you talking abt the image ? I read the image and get 4bits per pixel of the image : RGB + 1 reserved. Then I tried to do : Serial = SumOf(Bbits) - SumOf(Gbits). I am going wrong there ... @ Trevil : If you have solved it, plz post a solution. I am going to trace through the crackme again .. Nice crackme :)
costy Author 21. Mar 2010	@T.0.R.N.A.D.0. What. Obviously you meant bytes (not bits). But my crackme uses only 3 bytes per pixel. Contact me privately if you don't understand.
T.0.R.N.A.D.0. 22. Mar 2010	Yeah sorry abt that, it's bytes (not bits). I know your Crackme uses 3 bpp, but the image may not always use 3 bpp. I was trying with a 24-bit bmp that I made with MSPaint. When I try to read the image, I can see 4 bpp (in Hex Viewers), but your crackme uses 3 bpp !
costy Author 22. Mar 2010	@T.0.R.N.A.D.0. Yes T.0.R.N.A.D.0 "the image may not always use 3 bpp" but my crackmes uses 3 bytes. This is a difficulty of my crackme. It's strange that an image with 24 bit = 3 bytes has 4bpp. Anyway the bytes in a bitmap file are stored in a strange way. My crackme as you can see don't read the bytes directly from the file. It loads the bitmap and then with an API function ;) gets the bytes . In the bmp file the byte haven't a clear order. What language are you using to write the keygen?
T.0.R.N.A.D.0. 22. Mar 2010	Actually 24bit is 3bpp but probably the extra padding bytes were stored when I read the file. (I am using VB and I use GetBitmapBits).
costy Author 22. Mar 2010	@T.0.R.N.A.D.0. So you use GetBitmapBits Picture1.Picture, number_of_bit_to_read, the_array(0). The crackmes use the same. It must work!!!!! Send me the source of keygen, I'm curious.

costy's INTERNET SECRECTS

Download INTERNET_SECRETS.ZIP, 4 kb (password: crackmes.de)
Browse contents of INTERNET_SECRETS.ZIP

Find the valid serial is easy.
Keygen is difficult.
Selfgen not allowed.

RULES:
Create a keygen.
Explain how the valid serial is generated.
You can't use ReadProcess memory or any trick like this.

HINT:
The crackme gets some data from internet.
It doesn't send any information about you.
The serial changes when the informations on the internet change.

SUGGESTIONS:
Stop your firewall to block the crackme.

DISCLAIMER:
I'm not responsable for any damage the crackme can do.

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 29. Jul, 2008
Downloads: 402

Rating

Votes: 7
Crackme is boring.

Rate this crackme:

Solutions

Solution by Whivel, published 17. aug, 2008; download (10 kb), password: crackmes.de or browse.

Whivel has rated this crackme as nothing special.

Discussion and comments

Xspider 29. Jul 2008	another nice crackme :D
costy Author 29. Jul 2008	I just wanna to remember that the serial is easy to get. Just a breakpoint on the right API. But a keygen is a little bit more difficult.
obnoxious 30. Jul 2008	so it may screw my pc!!!!!!!!!!!
costy Author 30. Jul 2008	@obnoxious I don't think it's possible.
prasid 30. Jul 2008	Excellent........Excellent.......U r a GURU
obnoxious 30. Jul 2008	I'm not responsable for any damage the crackme can do. what does that suppose to mean :)
prasid 30. Jul 2008	It has no any harmful content,,,,)
DigitalAcid 30. Jul 2008	SUGGESTIONS: Stop your firewall to block the crackme. DISCLAIMER: I'm not responsable for any damage the crackme can do. That's a bit of a contradiction, lol.
Ox87k 30. Jul 2008	C'mon it's secure!
costy Author 30. Jul 2008	The crackme gets some data from internet. It's clear that if there is a firewall that stops the crackme it doesn't work. About the disclaimer. A lot of commercial applications have a disclaimer. This doesn't mean your computer will explode. But if it happens I'm not responsable for any damage the crackme can do.
MACH4 30. Jul 2008	Yes, simple enough code to realise there is nothing damaging there!
costy Author 30. Jul 2008	No access to any file on yoor hard drive. No access to registry. No problems!
obnoxious 31. Jul 2008	eh! i was just pulling costy's leg.......
costy Author 01. Aug 2008	What do you want to do with my legs??
DigitalAcid 01. Aug 2008	Lol, it's a saying ;). I think it means something like he wanted to tease you.
Bl@ck 03. Aug 2008	Warning !! do not tease to costy........
costy Author 03. Aug 2008	@Bl@ck Be quite friend. ;)
Bl@ck 03. Aug 2008	Just kiding...:)
simonzack Moderator 04. Aug 2008	my pc says: "Component 'misinet.ocx' or one of its dependencies not correctly registered: a file is missing or invalid" with a big red error box. is this intentional???
Bl@ck 04. Aug 2008	Firstly says msinet.ocx not misinet.ocx. Download MSINET.OCX (search on google) and put it in your system (win95/98/me) or system32 (winXP/2000/nt) folder. Then go to Run,type regsvr32 msinet.ocx May be worked:)
costy Author 05. Aug 2008	Yes. Just download them.
chodon 16. Aug 2008	Really too hard....
costy Author 17. Aug 2008	good job Whivel. but why you wrote "nothing special"?
Whivel 18. Aug 2008	it was my first vote.... I wrong, i believe it was higher than "nothing special"...
chodon 21. Aug 2008	Thanks Whivel!!!!

costy's Mega Difficult JADE Crackme By COSTY

Download mega_difficult_jade_crackme_by_COSTY.zip, 4 kb (password: crackmes.de)
Browse contents of mega_difficult_jade_crackme_by_COSTY.zip

You have to find the valid serial.
You can't modify the exe and you can't modify "cripted.data".

Put the exe and "critped.data" in the same directory.

I think that this crackme is difficult for two reasons:
1) It's made with Visaul Basic 6 so it's assembly is difficult to understand.
2) The routine that checks the serial is particularly strange. I was ispired by another crackme.

After someone sends the solution i will say which crackme inspired me.

I dedicate this crackme to p.jade

Good luck and find the solution :-)

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 25. Jun, 2008
Downloads: 390

Rating

Votes: 3
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by movzx, published 02. jul, 2008; download (3 kb), password: crackmes.de or browse.

movzx has rated this crackme as quite nice.

Discussion and comments

costy Author 26. Jun 2008	Strange... Probably I made an error while selecting the difficulty... It's higher then 4 (i think)... Or moderators changed it after evaluation the program... I don't know...
costy Author 26. Jun 2008	What do you think about it? :)
MACH4 26. Jun 2008	Excuse me for asking but who is P.Jade? Is it a clue?
costy Author 26. Jun 2008	Hello MACH4 P.Jade is a great friend. I dedicated my crackme to her and it's a clue ;-)
PrincessJade 26. Jun 2008	that would be me :)
MACH4 27. Jun 2008	Ok thanks for the clarification! think I know whats going on but I'm not very good at reversing vb.6 to find how the check is done.
DigitalAcid 27. Jun 2008	I think I somehow know what costy (or the crackme) tries to do, but cannot find any valid stuff atm. The serial checking looks so weird =).
costy Author 27. Jun 2008	Hello MACH4 and DigitalAcid... send me a private message and tell me what are you doing
MACH4 28. Jun 2008	Ok I know how this CrackMe works! Just a few unknown details atm My vb6 debugging capabilities are not very good though, but I will try to make a keygen...
costy Author 29. Jun 2008	keygen?? Only a serial is valid... And it doesn't change if you have a different computer... SORRY ABOUT ENGLISH
Xspider 29. Jun 2008	is that mean a hardcoded serial ????????!!!!
costy Author 29. Jun 2008	hardcoded?? The serial is stored in the data file in a really particular way.
costy Author 29. Jun 2008	Little Help: remplace the ones in the data file with zeros. Then save it. Now open the exe and click Check without inserting a serial. The program will display the Good Boy message. Now you should understood someting...
MACH4 29. Jun 2008	If I'm right then the serial is (almost) a fixed one but no, not hard coded in the sense you mean -) The check is the fascinating feature!!! But then again, I could be wrong of course!
costy Author 30. Jun 2008	I think the only solution is making a program that "traslate" the information in the data file.
movzx 01. Jul 2008	wew... tricky.. but solved.. wait for my tut.. :D
costy Author 01. Jul 2008	OK So the solution is ready. I was ispired by "Imagine" crackme
obnoxious 02. Jul 2008	nice trick costy n a really gr8 tut by movzx ;)
movzx 02. Jul 2008	hurray.. approved! "After someone sends the solution i will say which crackme inspired me." so.. which one?
movzx 02. Jul 2008	errrr... i mean.. where can i download the "imagine" crackme?
costy Author 02. Jul 2008	image crackme is here http://bigspider.altervista.org/Crackmes/imagine.zip but it works only on win 9x Anyway... Good gob... i'm studying your solution.
MACH4 02. Jul 2008	Nice one movzx, I had two problems. Had dumped the data file and in notepad and squashed the lines like you did, but my eye's couldn't see the p jade message! The other thing I was stuck on was the GetPixel was visited twice. once x = 1 and the second visit y = 1, but the oposite inputs was always out of bounds so returning false or FFFFFFFFh on every time. Anyway, my vb6 debugging knowledge is quite poor! You don't mention anywhere in your solution, where your inputted number is checked in the algo, only the check between file content and get pixel? Am I missing something?
movzx 02. Jul 2008	costy : thx :D MACH4 : if the GetPixel returns 0xFFFFFFFFh, means it the pixel is outside of the current clipping region. This because you overlap the main window of this crackme while you debugging and this crackme is paused by breakpoint. so the current pixel queried is not the TextBox' pixel, but probably your OllyDbg's current pixel at current point. "where your inputted number is checked in the algo, only the check between file content and get pixel?" the check between file content and get pixel is the check for inputted number. you see.. the algo scans for black and white pixel inside the TextBox. the font color is black, and the background (the TextBox color) is white.
MACH4 02. Jul 2008	@movzx, Thanks for the explanation! I realise this now but I'm still surprised that GetPixel(hdc,1,1) actually gets the center pixel of each char in the textbox! ( whichI imagine is what is happening so that center of 0 is white and center of 1 is black) I'll have to work this one out with asm...
movzx 02. Jul 2008	@MACH4, the GetPixel is inside the inner loop, and the x and y of GetPixel is from the loop index.
MACH4 02. Jul 2008	@movzx, It would be ideal if this forum allowed uploading diagrams. My brain is saying that this loop won't work, but obviously it is! lol. Once I've sorted this out with an explanation, I'll pm you and costy with what I've found!
costy Author 03. Jul 2008	MACH4 I sended the source to you... examine it.
MACH4 03. Jul 2008	Hi costy, Yes the penny has finally dropped, I fully understand every detail now! after playing with it all last night. I had never seen such a method used before so my brain was telling me this is not right, when all the time it was! Thanks for being patient with me and many tnks for the source. Also tnks to movzx, who hit the nail right on the head! I've used his type of double loop before for scanning images, I had never even thought about the same principle being used to scan text in a textbox! Really excellent Crackme and very innovative! MACH4
costy Author 03. Jul 2008	It's not a new crackme. It's inspired by http://bigspider.altervista.org/Crackmes/imagine.zip. But mine is a bit different. imagine crackme works only on 9x that's the problem.
Xspider 03. Jul 2008	yep it was a c0ol own good job mate ;)
costy Author 04. Jul 2008	I liked a lot that crackme. So I decided to make another crackme very similar.

costy's S-n-a-i-ck the worm game

Download s-n-a-i-ck_the_worm_game.zip, 11 kb (password: crackmes.de)
Browse contents of s-n-a-i-ck_the_worm_game.zip

This crackme is about the old game you surely know.
The crackme starts when the user runs "the_loader.exe".
"the_loader.exe" and "s-n-a-i-ck.exe" comunitate in order to make the software work correctly.
You have to modify "s-n-a-i-ck.exe".
The crackme is solved when "the_loader.exe" is no more necessary.
You can patch, code inject, add a dll...
Good luck.
I hope you like the crackme.

Ps. Congratulation to synak who solved FOUR ACES, my last crackme about POKER.

Ps2. The files must stay in the same directory.

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 31. May, 2010
Downloads: 366

Rating

Waiting for at least 3 votes
(we have only 1).

Rate this crackme:

Solutions

Solution by PeterPunk, published 02. jun, 2010; download (25 kb), password: crackmes.de or browse.

PeterPunk has not rated this crackme yet.

Discussion and comments

PeterPunk 31. May 2010	Nibbler rules!!!! Solution submitted.
costy Author 01. Jun 2010	The solution is not good. It should be better to delete it. Try this if the snaick is going down and you click arrow up in the original crackme the snaick refuses to go up and continue to go down. In the PeterPunk's solution if the snake is going down and you click arrow up the game ends with a game over. The same consideration is valid if the snake is going to the left and the user clicks the right arrow. In the original version the snake refuses to change direction and continues to go to the left, in the PeterPunk's solution the game end becouse the user lost. This is the real difficulty of this crackme. I wish a better solution will be uploaded and this one, that is incorrect should be deleted. I don't know if I were clear becouse I'm not English, so I get some difficulties to explain, but the NEW version doesn't work exactly like the original one. To moderators: please test what I wrote.
andrewl.us Moderator 01. Jun 2010	PeterPunk: please consider your solution on hold... please upload new version over it (click "your submissions" -> "upload new version") when you've addressed costy's concerns
PeterPunk 01. Jun 2010	Sorry costy, I had not noticed that detail. I've uploaded a new version. And I hope everything is already fixed. Greetings.
costy Author 02. Jun 2010	Your solution is perfect now!!!!!!!!!!!!!!!!!
PeterPunk 02. Jun 2010	Thanks costy. Your crackmes are always interesting and very original. Greetings.
r-Evolution 27. Oct 2010	Well i like this one more than the poker one........Its great and i am working on it now...(I think you are a great programmer with great ideas to make for crackmes)it just happens to hate gambling :P

costy's VideoGame Crackme By COSTY

Download videogame_crackme.zip, 451 kb (password: crackmes.de)
Browse contents of videogame_crackme.zip

You have to hack a game.
Read the rules file. It's a pdf.

I dedicate this crackme to P.Jade for her birtday.
Happy Birtday P.Jade.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 19. Jul, 2008
Downloads: 1037

Rating

Votes: 5
Crackme is nothing special.

Rate this crackme:

Send a message to cr4ckd0r »

View profile of cr4ckd0r »

Solutions

Solution by anewbies, published 31. jul, 2008; download (1063 kb), password: crackmes.de or browse.

anewbies has rated this crackme as nothing special.

Solution by obnoxious, published 25. jul, 2008; download (223 kb), password: crackmes.de or browse.

obnoxious has rated this crackme as quite nice.

Solution by Bispoo, published 25. jul, 2008; download (1068 kb), password: crackmes.de or browse.

Bispoo has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

MACH4 19. Jul 2008	Hi costy, You can write them faster than I can download them! lol happy birthday P.Jade
Xspider 19. Jul 2008	that's a nice game :p btw happy bday P.Jade :D
xylitol 19. Jul 2008	damn that really suxx I am in vacancy i cannot crack that i have no tools T_T trainerMe are great :]
obnoxious 19. Jul 2008	will checj it out later on. in any case happy birthday p.jade
PrincessJade 20. Jul 2008	gosh, all this attention is great lol my bday is not till monday the 21st
obnoxious 20. Jul 2008	@costy what if i made a 1000,000 points playing the game ;)
Bispoo 20. Jul 2008	Nice Crackme costy, made a nice Trainer for him :) @Moderators To submit my Solution + Trainer, must i include the source for the trainer too? or can i just explain it how i adquired the addresses where to change.
TiGa 20. Jul 2008	You need to include the source of the trainer too.
costy Author 20. Jul 2008	Oh no.... Bispoo already solved it.... :-( The source for the trainer??? What is a trainer?
costy Author 20. Jul 2008	@obnoxious If you were here and you made 1000.000 points I give you a beer...
Bispoo 20. Jul 2008	Ok, ill have to tidy up the source then, and gonna make it well commented, right now its a mess :p thats why i asked.
obnoxious 20. Jul 2008	costy right now i m playing your game with infinite lives guess sooner you will have to send me that bottle of beer ;)
xylitol 20. Jul 2008	costy: http://en.wikipedia.org/wiki/Trainer_%28games%29#Trainers
obnoxious 20. Jul 2008	yipee i will get my beer my score was 4040000404
costy Author 20. Jul 2008	@xylitol Thank you for the definition. @obnoxious Congratulations. alcohol can be dangerous drink moderately.
costy Author 20. Jul 2008	I'm planning to make another crackme game. Please tell me the subject of the game. Any suggestion is allowed.
PrincessJade 20. Jul 2008	how bout some kind of hacker sim game like in that movie wargames?
costy Author 20. Jul 2008	@PrincessJade Could you explain better? @other people Explain your idea
obnoxious 20. Jul 2008	@costy i m not into drinking. you could get me some spaghetti ;)
obnoxious 20. Jul 2008	costy have sent you an email check it out.....
PrincessJade 20. Jul 2008	i dunno if they have that movie there
starlight 21. Jul 2008	I tried to modify the code, but it showed "Errore nell'apertura del file"....
costy Author 21. Jul 2008	@starlight It means "Error while opening the file". CRC or something like that I think.
Bispoo 21. Jul 2008	no... it means you cannot change the exe name. it must reamain VideoGame Setup.exe
costy Author 21. Jul 2008	Oh yes... probably you changed the name!
Haykuro 21. Jul 2008	fun, but simple, trainme.. make some more! (solution submitted)
costy Author 21. Jul 2008	@Haykuro "make some more!" I asked for suggestions ;-) @ all cracker Please vote.
MulleDK13 21. Jul 2008	Don't make installers!
costy Author 21. Jul 2008	@MulleDK13 Why not??
Xspider 21. Jul 2008	yep i agree with that :p
costy Author 21. Jul 2008	I can't be sure all required files are in your pc without an installer!
Xspider 21. Jul 2008	but you add them to to archive WinRAR ?!?!
obnoxious 22. Jul 2008	where was an archive? it had a setup a .dat file and a .bin file????
costy Author 22. Jul 2008	OK. I understand what do you mean. Next time I put all files in the archive. ;-)
Xspider 22. Jul 2008	@obnoxious i meant that he add all files in one archive!! @costy ok :D thx :p
costy Author 22. Jul 2008	Sorry I can't make other games.
LCfer 23. Jul 2008	Can I use cheat engine or similar cheating tool to get addresses? Faster than using olly or IDA :p
LCfer 23. Jul 2008	Is that 'legal way'? :)
costy Author 23. Jul 2008	You can do anything!
LCfer 24. Jul 2008	Nice! and nice game too! :D
costy Author 24. Jul 2008	WoW. 251 downloads. I think that the users of crackmes.de like this game. :-) :D
Xspider 24. Jul 2008	:lol: i think so :p
DigitalAcid 24. Jul 2008	Or maybe they simply want to crack that game =).
costy Author 24. Jul 2008	@DigitalAcid I think "VideoGame" in the crackme name attracts a lot of people. Anyway RATE the crackme guys!!!!!
costy Author 25. Jul 2008	2 good solutions. Congratulations!!
xylitol 25. Jul 2008	obnoxious, cheat engine rulez
obnoxious 25. Jul 2008	so costy how do you like my new solution???? ;)
Bispoo 25. Jul 2008	@obnoxious "but after reading costys email where he tells me that bispoos soln was better i felt a bit sad " Your work is your work, you achieved your goal, by a different path, its no better or worse, there are various paths to achieve your goal. its good 2 have more than 1 different solution, helps people see all the different approaches.
obnoxious 25. Jul 2008	@bispoo i hope the pm clears everything up. gr8 tut @bispoo
obnoxious 25. Jul 2008	for all those who have downloaded my tut plz remove the .renamed extension from videogame_setup.exe.renamed and r!sc process patcher.exe.renamed to use them
costy Author 25. Jul 2008	I liked a bit more bispoo solution becouse he explained cheat engine but I like obnoxious solution too.
simonzack Moderator 03. Aug 2008	i tried the same approach, but never found where the points were stored @tsearch: nice tool, never knew it was there :)
costy Author 03. Aug 2008	@simonzack Try Game Wizard if tsearch doesn't run correctly. http://gw32.dlh.net/main.php?show=download&lang=eng PS. tsearch works better.
obnoxious 04. Aug 2008	@simonzack you can also try out game cheat engine
simonzack Moderator 04. Aug 2008	@costy: no, no, i meant i tried searching the values in the dump and couldn't find them :p @obnoxious: thanks, I'll try that :)

cr4ckd0r's crackme1 by cr4ckd0r

Download crackme.zip, 22 kb (password: crackmes.de)
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rules: solve my crackme
write ackeygen and tutorial

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 22. Apr, 2015
Downloads: 603

Rating

Votes: 3
Crackme is boring crap.

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Solutions

Solution by vbad, published 19. may, 2015; download (1022 b), password: crackmes.de or browse.

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Discussion and comments

Cubinator 13. May 2015	Why writing a keygen? This crackme only checks, if the name is "cr4ckd0r" and the serial is "Crack me if you can!!!" without ignoreCase and it's done.
vbad 15. May 2015	yes, i noted that in my solution, just hardcoded checks written in .NET. But a crackme none the less.
givses 14. Jul 2015	Nothing to solve... Private Sub Button1_Click_1(ByVal sender As Object, ByVal e As EventArgs) If (Me.TextBox1.Text = "cr4ckd0r") Then If (Me.TextBox2.Text = "Crack me if you can!!!") Then Interaction.MsgBox("Solved! Now write a keygen and tutorial!", MsgBoxStyle.Information, "good boy...") End If Else Interaction.MsgBox("Wrong! Try Again!", MsgBoxStyle.Information, "bad boy...") End If End Sub

cr4sh3r's Wicked crackme #1

Download crackme1.zip, 1 kb (password: crackmes.de)
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Simple messageboxes crackme. Lil' brain inclu

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 03. Mar, 2004
Downloads: 988

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Solutions

Solution by Bytedevil, published 08. mar, 2004; download (582 b), password: crackmes.de or browse.

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Crack4Me's Try2CrackMe

Download Try2Crack.zip, 53 kb (password: crackmes.de)
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Try to crack it but keep in mind that its will keep restarting your computer :) Good Luck

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 01. Oct, 2004
Downloads: 1127

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Solutions

Send a message to CrackerSixx »

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Solutions

Solution by Oorja-HalT, published 24. aug, 2004; download (9 kb), password: crackmes.de or browse.

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Solution by TaGaDaPaF!, published 24. aug, 2004; download (47 kb), password: crackmes.de or browse.

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CrackerSixx's CSDXCrackme

Download CSDXCrackme.zip, 168 kb (password: crackmes.de)
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Another c# crackme. This time a fullscreen directx9 interface, obfuscation, anti-ildasm, and packed exe to make things tougher :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 11. Sep, 2004
Downloads: 1070

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CrackerSixx's NetCrypto

Download C6-NetCrypto.zip, 13 kb (password: crackmes.de)
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NetCrypto v1.0 Crackme by Crackersixx
-------------------------------------

(You will need the .net framework v1.1+ installed to run this crackme)

Objectives: (no patching or loaders)

* Find a valid serial...

Allowed:
* Anything as long as your serial works on an unmodified version of the crackme.

If you have completed this crackme, Send your zipped solution
to cracker_sixx@comcast.net and post on crackmes.de.

Greets to all on www.crackmes.de...

-C6 (cracker_sixx@comcast.net)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Unspecified/other

Published: 03. Apr, 2005
Downloads: 1094

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by ViruX, published 11. dec, 2006; download (28 kb), password: crackmes.de or browse.

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Solution by pnluck, published 30. jan, 2006; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

benny2c 01. Nov 2006	is there any way to get the key except bruteforce? :D

CrackR's KrakkRSR

Download KrakkRSR.zip, 4 kb (password: crackmes.de)
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This is made in C#, and I can't crack it, so try it!
I made this myself.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 20. Jan, 2016
Downloads: 498

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Solutions

Solution by 7ssX, published 25. aug, 2016; download (577 b), password: crackmes.de or browse.

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Solution by apuromafo, published 09. feb, 2016; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

r0xw3l 21. Jan, 12:31	public Form1() { this.krakkey = "2968723465784783"; this.components = null; this.InitializeComponent(); } 2 minutes ))
Mizre 21. Jan, 18:29	Very much so, 2 minutes
Den-Dzen-Pen 24. Jan, 17:29	2968723465784783
w4rum 03. May, 07:32	2968723465784783 Awesome, I'm a beginner and these are very good challenges :) Thanks, everytime I crack one of these, I feel satisfyed :D
Danbanan 08. May, 12:07	There should really be some spoiler tags wrapped around the comments section. ;-)
hanna21 21. Jun, 23:42	am new to this crack me i cannot search for the string so how do i set break point?
kyronos 26. Jun, 03:49	easy but thanks
Debüt 27. Aug, 19:05	Perfect for the first Crackme.
Ultimate DeV 28. Aug, 12:56	Public Sub New() Me.krakkey = "2968723465784783" Me.components = Nothing Me.InitializeComponent End Sub Good one
bhups 30. Aug, 16:05	What did you use to decompile the file? I've been out of this game for a LONG time.

CrackR's Krakk v.10 SHA-1 edition (KEYGENME)

Download KRAKK_v.10_SHA-1_edition.zip, 5 kb (password: crackmes.de)
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DO NOT PATCH.
THIS IS A KEYGENME.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 20. Jan, 2016
Downloads: 159

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by apuromafo, published 09. feb, 2016; download (79 kb), password: crackmes.de or browse.

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Solution by Mayhem, published 09. feb, 2016; download (3 kb), password: crackmes.de or browse.

Mayhem has rated this crackme as boring.

Solution by Tnavarro, published 09. feb, 2016; download (6 kb), password: crackmes.de or browse.

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Solution by acruel, published 09. feb, 2016; download (1 kb), password: crackmes.de or browse.

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Solution by SoN, published 09. feb, 2016; download (37 kb), password: crackmes.de or browse.

SoN has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

Mayhem 25. Jan, 16:54	Solution in queue.
aldeid 10. Feb, 16:09	Very easy. I would rather rate it 1 - very easy, for newbies

[CrackZ]Yoda's Crackme3

Download crackme3_.zip, 4 kb (password: crackmes.de)
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Serial - Name

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. May, 2004
Downloads: 913

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Solutions

Solution by nEo_TheOne, published 03. may, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by myllan, published 03. may, 2004; download (692 b), password: crackmes.de or browse.

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[CrackZ]Yoda's Crackme #1

Download crackme1.zip, 5 kb (password: crackmes.de)
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My First Crackme (VB)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: (Visual) Basic

Published: 03. Jan, 2004
Downloads: 1231

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Solutions

Solution by 7of9, published 04. jan, 2004; download (21 kb), password: crackmes.de or browse.

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[CrackZ]Yoda's Crackme #2 VB

Download crackme2.zip, 41 kb (password: crackmes.de)
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Name/Serial in VB

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: (Visual) Basic

Published: 10. Feb, 2004
Downloads: 1517

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Solutions

Solution by +Pumqara, published 14. feb, 2004; download (89 kb), password: crackmes.de or browse.

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Solution by kao, published 13. feb, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by LuCiFeR, published 13. feb, 2004; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

crack-break's crack-break's crackme#1

Download crackme#1.zip, 3 kb (password: crackmes.de)
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veryyy veryyy easy... nothin special....

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 13. Jan, 2008
Downloads: 1125

Rating

Votes: 8
Crackme is quite bad.

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Solutions

Solution by br0ken, published 17. jan, 2008; download (2 kb), password: crackmes.de or browse.

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Solution by mik26vn, published 17. jan, 2008; download (2 kb), password: crackmes.de or browse.

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Solution by Computer_Angel, published 17. jan, 2008; download (9 kb), password: crackmes.de or browse.

Computer_Angel has rated this crackme as boring crap.

Solution by cosmos, published 17. jan, 2008; download (2 kb), password: crackmes.de or browse.

cosmos has rated this crackme as boring.

The submission of solutions is closed.

Discussion and comments

Computer_Angel 14. Jan 2008	Easy, Just for warm up ^.^
crack-break Author 14. Jan 2008	i know...thats y i said its toooooo easy above....and ya... as this is my first coded project...its mandatory that the srackme will be easy :)
fromTurkey 15. Jan 2008	hi iam new of this can some one help me t crack this code thanks for all ;)
crack-break Author 15. Jan 2008	obviously... pal if no one gives then i l give u ....
halsten 15. Jan 2008	Unfortunately, I submitted a solution to this crackme, but TiGA rejected it cause the code I pasted was not commented enough. @fromTurkey: Look at "sub_4010C7" this is where the serial resides. You will see it's hard-coded. (Direct Compare). Hope that helps you. Regards, halsten
fromTurkey 15. Jan 2008	halsten ı couldnt find the sub_4010C7 . where is it. help please. +rep :) meanwhile you should not give the serial emtapcrack. that is not well behaved.
halsten 15. Jan 2008	@fromTurkey: I assumed you were using IDA. Anyways, you should look at address "004010C7". It starts with something like this in IDA ... .text:004010C7 push ebp .text:004010C8 mov ebp, esp .text:004010CA mov edi, offset String .text:004010CF push edi .text:004010D0 call lstrlenA .text:004010D5 mov edx, eax .text:004010D7 xor eax, eax .text:004010D9 xor ecx, ecx .text:004010DB mov ecx, 0 [...] I hope you get that. Good luck. Regards, halsten
fromTurkey 15. Jan 2008	thanks man :D ı solved it. much love...;)
halsten 15. Jan 2008	@fromTurkey: You are welcome.
TiGa 16. Jan 2008	@halsten: Solutions for easy crackmes must contain more details than others. It's mostly people who don't know how to solve the crackme that will read a solution. Uncommented code is what they get anyway in Olly or IDA.
crack-break Author 16. Jan 2008	if anyone can... then also submit a video tut and thanks halsten and from turkry for spending there valuable time on this... and thanks to tiga tooo
halsten 16. Jan 2008	@TiGa: Yes, I understand you. No problem. :)
halsten 16. Jan 2008	@crack-break: No worries, it was fun cracking this one. :P
crack-break Author 17. Jan 2008	chek the new one out
halsten 17. Jan 2008	@fromTurkey: This is not a warez website, please consider reading the rules before posting again.
fromTurkey 17. Jan 2008	ok halsten. my bad :(
br0ken 17. Jan 2008	Nice and easy. Thank you :)
VaZoNeZ 13. Feb 2008	JNE -> JE Its very easy!
E1xis 14. Mar 2008	I found it great as a noob, it was great to catch up for the tougher ones.
r00ster 29. Mar 2008	Simple but funny anyway
toma6868 29. Mar 2008	@crack-break : nice crackme for newbies ;-) thanks...
izlesa 09. Dec 2008	hehe, killing app, if serial doesnt match is very fun )) sry for bad english ...

crack-break's crack-break's crackme#2(unpacked)

Download crack-breaks_CRACKME_#2_(unpacked).zip, 3 kb (password: crackmes.de)
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hmmmm... easy... very... easy...
gold solution .... working keygen with a tut

regards
crack-break
Team CiB

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 17. Jan, 2008
Downloads: 516

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by mik26vn, published 18. jan, 2008; download (9 kb), password: crackmes.de or browse.

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Solution by cosmos, published 18. jan, 2008; download (8 kb), password: crackmes.de or browse.

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Solution by profdracula, published 18. jan, 2008; download (7 kb), password: crackmes.de or browse.

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Solution by Computer_Angel, published 18. jan, 2008; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

halsten 17. Jan 2008	Again, easy. Level 2 is too much for this one in my own opinion.
halsten 17. Jan 2008	Too easy and still defeated. crack-break, write a more harder one again. :P
br0ken 18. Jan 2008	Small and easy algo :P
Computer_Angel 18. Jan 2008	For relax at the weekend. Nice !!!
crack-break Author 18. Jan 2008	yep budy i havent learnt the trick of encryption ... the day i learn.... i will post difficult ones
crack-break Author 18. Jan 2008	there i did something wrong while coding..... hope next time without flaws
profdracula 18. Jan 2008	Good for newbees. Code and logic is jaggy at some places. I am uploading solution, but main motive of solution is to show and learn from pitfalls of coding. P.S. Hi crack-break! Hey dost, thoda mehnat ki jarurat hai :)
cosmos 18. Jan 2008	Is it really possible to keygen this crackme. It uses memory locations in serial calculation. I've coded one now but i'm not sure how it will work in other machines with different memory locations.
fromTurkey 18. Jan 2008	hi everybody i want to ask you some questions how can we write a keygen. ı crack some codes here ( for newbees :) ) but ı dont know how to realize and determine keygens. i know the meanıng of the keygen that is creating serials but how does it works...:) thanks for all..
DigitalAcid 18. Jan 2008	Does a Selfgen count too ? :) @ fromTurkey: A keygen is a program that uses the same algorithm as the crackme. This can be done by "ripping" the code from the crackme or by writing your own program with that same algorithm. Obviously, if you choose for the last option, you need to understand the algorithm completely.
DigitalAcid 18. Jan 2008	Oops, the selfgen was for another crackme, sorry =).
crack-break Author 18. Jan 2008	@ profdracula... kya batu dost maine khabhi programming nai sikha... mai MSc biotechnology kar raha hooo... mai khud se MASM seekh raha hooo
fromTurkey 18. Jan 2008	thanks for your answer digitalacid.
Computer_Angel 18. Jan 2008	DigitalAcid@: if you ripping the code there is a chance that you don't need to know the algorithm if the keygen, just copy and paste. I think selfgen just like sniffing.
mik26vn 18. Jan 2008	hello all, i will be very thankful if someone can give me a hint about ESI ? This crackme is very nice also ;)
DigitalAcid 19. Jan 2008	@Computer_Angel: Yeah, i know, but no need to reinvent the wheel imo =). As long as you understand and/or explain how the algorithm works. I don't think it can be selfgenned anyway because the API i wanted to use isn't there... PS: was there or will there be a packed version ? Because it says "unpacked".
crack-break Author 19. Jan 2008	well buddy... see... ESI is one of the 8 regis that are used by the proceessor that will be used for calculation thats required at that moment or very soon.... other data thats used very later are stored on stack..... another thing about ripping is that sometime the coder code things by usinfg pointers like [ebp+2c]... i doubt if ripping will help here..... moreover sometimes use of register use is so much confused by goood coders.... its really hard to rip.... its better to understand the algo and use your own registers...

crack-break's crack-break keygenme#3

Download CRACK-BREAK_KEYGENME#3.zip, 3 kb (password: crackmes.de)
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well surely not for newbies... hmmmmmm well u must make a valid keygenme without ripping the algo....

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 10. Mar, 2008
Downloads: 439

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by br0ken, published 13. mar, 2008; download (36 kb), password: crackmes.de or browse.

br0ken has rated this crackme as awesome.

Solution by cosmos, published 13. mar, 2008; download (90 kb), password: crackmes.de or browse.

cosmos has rated this crackme as nothing special.

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Discussion and comments

br0ken 12. Mar 2008	I enjoyed this CM. Thanks a lot! I will write a tut as soon as possible :)

craig@neo's miniVMCrackme1

Download miniVMCrackme1.zip, 3 kb (password: crackmes.de)
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miniVM Crackme v1
=================

Author: Craig Smith
Diffuculty: 2 with VM source
Rules: No Patching
Goal: Find a valid password, write a solution detailing the techniques used to analyze the VM.

Description: This is an example virtual machine crackme used to demonstrate how VMs work. It's a companion crackme to a talk I'm giving at Recon 08 (http://recon.cx/) At the con I will be releasing the code to the Virtual CPU so the difficulty is set assuming you have read the slides and have the VM commented source code handy. You can try with out it but the difficulty is slightly higher. ;)

The algorithm is simple which is why the goal is more focused on documenting ways to analyze VMs. NOTE: even though the VM is called miniVM it's actually rather large :P

Download: After the Con, check out http://labs.neohapsis.com/ for source

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 09. Jun, 2008
Downloads: 973

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by andrewl.us, published 11. jun, 2008; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

xylitol 09. Jun 2008	nice strange protection
born2c0de 10. Jun 2008	I think I've figured out the basic idea (about how a global variable is looked up, added to the offset to the "Bad Boy" to get the value of the Good Boy procedure) The problem is with the code that manipulates the global variable....That's way too many jumps. I'll need to devote an entire day for this. I hope your protection is more than just these jumps. Otherwise, it's an interesting crackme. Thanks
andrewl.us Moderator 10. Jun 2008	I can't get a passport in time to make it to RECON :( Craig, if you're a 29A fan, feel free to spider my Z0mbie mirror: http://andrewl.us/library/site_z0mbie/
TiGa 11. Jun 2008	If all goes well, the presentation videos from ReCon 2008 "should be" posted on their site the following Monday. The videos from 2005 and 2006 are already available.

|CraniX|'s CraniX'sCrackMe#6

Download crackme6.zip, 23 kb (password: crackmes.de)
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1 code find it!

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 22. Aug, 2002
Downloads: 1985

Rating

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Solutions

Solution by DiKeN, published 23. aug, 2002; download (210 b), password: crackmes.de or browse.

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|CraniX|'s CraniX's CrackMe#1

Download cranixscrackme.zip, 9 kb (password: crackmes.de)
Browse contents of cranixscrackme.zip

Impossible to crack, i dare you to try!

Difficulty: 9 - You can't solve this yourself :)
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Jul, 2002
Downloads: 3120

Rating

Votes: 7
Crackme is quite bad.

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Discussion and comments

MR.HAANDI 22. Jan 2009	I have a feeling, that this "crackme" is not legal. It looks like the "author" copied the code from some real-life target. First, the abstract algorithm is a simple substitution/transposition symmetric cipher and is easily reversable (max level 4 and definitely not 9), if one understands it. But the implementation looks like the author uses the registers as high level language variables and did not write the algorithm itself (in that case the compiler would have produced a different output). Additionally the check whether the serial is valid is really weird, I think, no reverser who is smart enough to write this nice bijective map would check the serial in that way. (Wondering why noone has complained since 2003 ?) If you take a closer look at the rules you will notice some points proving my thought as well. For the mods: this is level 4, but if the author cannot prove that he wrote this algo and understands it, this, actually, should be deleted.
Zero Moderator 22. Jan 2009	This is one of the crackmes which have been migrated from the old website. IMO it is not sure that the author of this crackme will answer this question after 6 years :/ I set the level to 4 until somebody assures that it is really harder... can anybody proof the comments by MR.HAANDI ?
HMX0101 22. Jan 2009	MR.HAANDI is right, this one isn't so hard and can be solved easily, and this one looks like a keygen for an real app... btw, if your guys don't notice it, all crackmes of cranix except this one were coded in VB ;)

|CraniX|'s CraniX's CrackMe #14

Download cc14.zip, 5 kb (password: crackmes.de)
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Make a keygen, then explain why the serial is never the same.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 27. Oct, 2010
Downloads: 252

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Solutions

Solution by Zephy, published 11. feb, 2011; download (32 kb), password: crackmes.de or browse.

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Discussion and comments

Zephy 06. Feb 2011	ufff, 24hour without sleep and tut+keygen was writen and send :-) ...thanks for fun :-)))
idid231 06. Feb 2011	My god, never have any serial from crackme, i don't like that, wait your public solution and your comment
Zephy 06. Feb 2011	I hope then will be approved :-)
idid231 07. Feb 2011	it's gen key from our's serial -> never have correct serial, boring, what about you, Zephy?
Zephy 07. Feb 2011	idid231: serial key is changed every second, that's little problem... :-)
idid231 08. Feb 2011	I don't like this kind, i want to have exactly serial :) Wait solution.

Solution by br0ken, published 30. jan, 2009; download (1043 kb), password: crackmes.de or browse.

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Discussion and comments

Sashx41 22. Jan 2009	I don't know all that commands with floats, but I think you should use integer. But anyway is solved it, its a 5 digit password.
shellwolf 22. Jan 2009	A big app without algo.
simonzack Moderator 23. Jan 2009	blame the compiler :)
psywolf 25. Jan 2009	Kaspersky says: Trojan.Win32.Shutdowner.cmh
shellwolf 26. Jan 2009	Never beleive Kaspersky.
MulleDK13 27. Jan 2009	I'm rendering my video tutorial now.
MulleDK13 27. Jan 2009	The submission page screwed up.. I'll try again tomorrow.
elmiguel 04. Feb 2009	Pretty Cool, Just getting into RE. I like it so far, still alittle confusing.
Creepy Author 30. May 2009	Im happy to see youve cracket it congratulations
papanyquiL 30. May 2009	Most C++ programs will show as a virus when a n00b author uses 'system("PAUSE")' :P
manorhacker 19. Jul 2010	look:: http://www.virustotal.com/analisis/63dd0be138b6aa69f897d7d3e91150b8b33278ec56ecd352b13aa8913fd97233-1257451367

Creepy's Creepys crackme#3

Download creepys_crackme#3.zip, 153 kb (password: crackmes.de)
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Easy crackme

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: C/C++

Published: 22. Jan, 2009
Downloads: 598

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Solutions

Solution by Flatline, published 17. jan, 2010; download (156 kb), password: crackmes.de or browse.

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Solution by br0ken, published 30. jan, 2009; download (1154 kb), password: crackmes.de or browse.

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Discussion and comments

shellwolf 22. Jan 2009	003F3BBC 34 34 34 34 61 66 67 35 36 61 66 67 35 36 62 78 4444afg56afg56bx 003F3BCC 64 62 78 64 dbxd [code]cmp a,b jz sucess fail[/code] is not a crackme.
Flatline 17. Jan 2010	Good beginner level crackme. Out of the cracks I found, there is a nice mixture of very simply obvious and a bit more of a challenge.
maxall 15. Jun, 19:23	This is where site rules and important announcements about the site are made. Please read carefully before you join. Also you can leave us feedback or ask site questions here.

Discussion and comments

Cre@k's CrackMe#7

Download c_crackme_7.zip, 14 kb (password: crackmes.de)
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Serial + Name

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 28. Oct, 2002
Downloads: 1831

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Solutions

Solution by xyzero, published 31. jan, 2004; download (11 kb), password: crackmes.de or browse.

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Cre@k's CrackMe#8

Download c_crackme_8.zip, 109 kb (password: crackmes.de)
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Nagscreen + Keyfile

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 28. Oct, 2002
Downloads: 1855

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Solution by Lightning, published 08. oct, 2002; download (915 b), password: crackmes.de or browse.

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Discussion and comments

Crick Author 26. Jul 2005	I'm really disappointed that this crackme don't fill your expectations, lightning. The crackme says no MANUAL patching. I think this is another way to have a software protection. Obsolete now, of course!! Your solution isn't valid. eSn-mIn said you what you wasn't able to see. Cheers. Crick
Lightning 08. Aug 2005	As I pointed out in the file, you have to have 9x or a dos install to run the crackme in. Under Win2K, it is not possible to do this.
Crick Author 18. Sep 2005	You're wrong. It's possible to run it under Win2k-Pro in Console-mode. But, if it wasn't possible to run it under Win2k, do this invalidate the crackme? It was written in July-2001 under Win98-SE

crk's crackme 2

Download crk_crackme2.zip, 845 b (password: crackmes.de)
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serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Feb, 2002
Downloads: 1914

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Solutions

Solution by minos, published 18. feb, 2002; download (2 kb), password: crackmes.de or browse.

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CromaxX's EasyCalc Crack-me

Download EasyCalc_crack-me_by_CromaxX.zip, 6 kb (password: crackmes.de)
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Very easy :)... The calcul might be the key ;) (Packed crack-me)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 11. Oct, 2004
Downloads: 2004

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Solutions

Solution by 9Bar, published 20. oct, 2004; download (6 kb), password: crackmes.de or browse.

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Solution by jack, published 17. oct, 2004; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

lonestar 13. Aug 2014	Password: 34275591
fangrenxing 27. Apr, 10:13	시방 놀리나? 이딴거 크랙미라구...

CromaxX's KeygenMe #2

Download KeygenMe_#2_by_CromaxX.zip, 65 kb (password: crackmes.de)
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A simple KeygenMe for newbies, with mathematic calculs !! :) (Packed)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 19. Aug, 2005
Downloads: 1228

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Votes: 5
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Solutions

Solution by missing in bytes, published 23. aug, 2005; download (3 kb), password: crackmes.de or browse.

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Solution by haggar, published 20. aug, 2005; download (84 kb), password: crackmes.de or browse.

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Solution by Ox87k, published 20. aug, 2005; download (30 kb), password: crackmes.de or browse.

Ox87k has rated this crackme as nothing special.

Solution by deroko, published 21. aug, 2005; download (30 kb), password: crackmes.de or browse.

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Discussion and comments

haggar 19. Aug 2005	To easy. Maybe something for biger noobs than me ;)
Immortal_One 19. Aug 2005	A few bugs found: 1. enter 9 chars on serial crash 2. enter name+serial without code good job message other than that to easy :D
CromaxX Author 19. Aug 2005	Sorry ! I'm repairing this bugs ! I'll upload a new version when it will be done !
deroko 19. Aug 2005	argh... I've already submitted solution =)
CromaxX Author 19. Aug 2005	Erf... sorry... maybe i'm not obligated to send a new version because the bugs are not very important ! Your aim is to create a keygenme, don't forget ! What do you think ? Upload a new version or give up ?
deroko 19. Aug 2005	I don't know I've created and submitted keygen + small solution, so it's all up to you... If you ask me, it is not a big problem, point was to make keygen =)
Ox87k 19. Aug 2005	i solve it :) submit my solution?
CromaxX Author 19. Aug 2005	okay... so submit your solutions & keygens, i won't upload my release ! Sorry for the bugs one more time ! =)
Ox87k 19. Aug 2005	ok, i submit my keygen, source file and txt with solution ;) thanks for this crackme :)
haggar 19. Aug 2005	What the hell, I submited my solution too.
Immortal_One 22. Aug 2005	CromaxX da bugs are not that important to upload a new version
microplant[mp] 22. Dec 2005	ok, this one is a little older, but since i just started with that stuff, i have a question. i havent read the complete solutions so far, just one part of the code generation. and from what i read, i made my code calculation correct. BUT, my code does not match the one generated. for example: if i have username "!" then i would have the following calculation: (0x21 + 0x3B9ACA00) * (0x21 * 0x01) = (0x3B9ACA21) * (0x21) = 0xAEF40E41 = 2935230017 but the generated code is 640262721. what am i missing ? just gimme the last part of the code puzzle pls, as in the solutions as far as i understand you guys have the same calculation as me. thx in advance.
Ox87k 23. Dec 2005	ur code it's right but after this routine there is: 0040139A 837D E4 00 CMP DWORD PTR SS:[EBP-1C],0 <-+ if result<=0x7FFFFFFF <--------+ 0040139E 79 0B JNS SHORT KeygenMe.004013AB <-+ jump down \| 004013A0 8D45 E4 LEA EAX,DWORD PTR SS:[EBP-1C] <- else \| 004013A3 8100 00CA9A3B ADD DWORD PTR DS:[EAX],3B9ACA00 <- add result, 0x3B9ACA00 \| 004013A9 ^EB EF JMP SHORT KeygenMe.0040139A <- and jump up +--------+ so after code=(0x21 + 0x3B9ACA00) * (0x21 * 0x01); u must to add while(code>0x7FFFFFFF) { code+=0x3B9ACA00; } ;)
microplant[mp] 23. Dec 2005	yes, I read that, but when I enter "E-404" as username, then the jump after 0040139A is taken, and nothin is added. Also, the result of IMUL EAX,EDX is the one showing in the code window of the crackme. But if i calculate that manually, I have a different result. Thats the part what I dont understand. The other question is, how do you know the value 0x7FFFFFFF ? CMP DWORD PTR SS:[EBP-1C],0 <= I cant see anything related to that value here. Maybe my questions are stupid, but since I never coded in ASM I have some trouble with translating the code for my understanding. But thank you for your help so far :)
microplant[mp] 23. Dec 2005	hmm...very curious...I just started coding my KeyGen and my KeyGen is calculating the correct Code :P Maybe I calculated wrong, or the Windows Calc isnÂ´t the best helper :)
code_inside 24. Dec 2005	microplant[mp], That 0x7FFFFFFF thing is because of the Conditional Jump after it, JNS :)
Ox87k 24. Dec 2005	yes i used 0x7FFFFFFF because under the cmp istruction there is a jns :)
microplant[mp] 24. Dec 2005	Ah, thx for the hint. I already finished my KeyGen, but I interpreted that 0040139A 837D E4 00 CMP DWORD PTR SS:[EBP-1C],0 as a check if the code (or serial) is a negative value, and if yes, add 0x3B9ACA00 until its possitive value. I tried my KeyGen with several names, and it always work. So I guess, my idea is correct too :D

CromaxX's KeygenMe #3

Download KeygenMe_#3_by_CromaxX.zip, 22 kb (password: crackmes.de)
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This keygenme use several functions of windows, but it's not very difficult :) Good luck and have fun !! (Packed crackme)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 31. Aug, 2005
Downloads: 1036

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by _HellDashX_, published 02. sep, 2005; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

_HellDashX_ 31. Aug 2005	Solution submited, :)

CromaxX's KeygenMe #4

Download KeygenMe_#4_by_CromaxX_(32bits_compiled).zip, 12 kb (password: crackmes.de)
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Find the serial... that's all =) !! This KeygenMe isn't packed. Patching is forbidden !! Good luck =) !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: C/C++

Published: 21. Feb, 2006
Downloads: 1608

Rating

Votes: 9
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Solutions

Solution by Taliesin, published 21. apr, 2006; download (8 kb), password: crackmes.de or browse.

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Solution by cyclops, published 09. may, 2006; download (19 kb), password: crackmes.de or browse.

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Discussion and comments

astigmata 23. Jan 2006	this one is really nice
CromaxX Author 07. Feb 2006	So keygen it please =) !! (and don't forget rating it !)
ultrasound 12. Feb 2006	I have a made an oraculum approach keygen for this, but for some reason it only gets valid serials when i run from within the MSVC++ environment, if I compile and run then the serial is shorter and wrong.. I cant see any code in the crackme that could be making a difference by where I run the keygen from.. CromaxX any hints? have you got some sort of oraculum protection that I have missed?
ultrasound 12. Feb 2006	hmm, on second check it doesnt work in debug mode specifically, it just works from time to time, i am still trying to figure out what changes when it does work..
ultrasound 12. Feb 2006	CromaxX, when I click 'Verify' for one of my serials it says 'Not Really', but if I press return on the verify button instead of clicking then it says 'Good job' For example, username: hello serial: E86784756t796;6;34q33925:59:o4534372c3942336742z4333;4:62:Z Press 'verify' and you will see 'not really' then press enter and see what happens..
CromaxX Author 20. Feb 2006	Woh what the f*** ??? I tried your example on several Windows XP versions (32 & 64 bits) and I didn't see "What happens"... Very strange =/ ! I compiled my source code with gcc(32bits) on Windows XP 64 bits Edition, maybe if I recompile it on the 32bits win version, your bugs won't appear ? But gcc is a 32bits compiler, so it's very strange... I'll submit my new version soon ! PS : Sorry for the response time, but I wasn't at home for holidays !
Zaphod 20. Feb 2006	CromaxX: I experienced a strange behaviour of your crackme similar to Ultrasound's - I tried with name: qwerty, serial: E99696;45t3;58:952q43966:485o4693526:5c3:95:63:26z3:57326566Z The first time the program said good job, baby - the next time ( and the following ) it said not really ( ?? ) One other thing: When I run the crackme by itself, I can move the window around, quit the program or minimize it like any other program - but when I run it in Olly, I can do none of these things. The window sits permanently in the middle of the screen. I this intended or is it a strange behaviour by my computer ?
ultrasound 20. Feb 2006	Ok Cromaxx Ill wait for the new version and then recheck my keygen :)
CromaxX Author 20. Feb 2006	Zaphod : It seems to be the same as ultrasound, but it not appear for me : it always shows "Not really...", for the two examples you gave me, very strange... But I can tell you that the two serial corresponding to the two name aren't good (if you want a little help, you can send me a message). For the window which is always in the middle of the screen, it's a normal thing, so don't worry =) As I said before, I'll recompile it on windows 32bits, and submit it. Jut for my information, what are your OS ?
ultrasound 20. Feb 2006	Im on WinXP (SP2), ill PM you, maybe I can send my keygen for you to test before I submit it here..
Zaphod 21. Feb 2006	WinXP Home (SP1). About the window in the middle of the screen - how come it's only when I run it with Olly? I don't see any Olly-checking in the program...
Ox87k 21. Feb 2006	yeah now working for me =)
CromaxX Author 21. Feb 2006	Ok cool =) I'll wait for the verdict of the others ^^
Zaphod 21. Feb 2006	ok, that helped - it's a normal window now :)
Rambo 23. Feb 2006	Rambo E86784687t79725966q33926935;o452432;c39422;8:78z53459;526Z I don't understand why I use Olly the work's fine , but if I open normal "KeygenMe #4" then doesn't work. ????
CromaxX Author 23. Feb 2006	Have you got the new version compiled in 32bits ?
Rambo 23. Feb 2006	Yes I have the new version.
CromaxX Author 23. Feb 2006	Very strage... It seem that the others haven't got any problem since the release of the new version. Do you execute it on windows XP or 2k?
Rambo 24. Feb 2006	windows XP SP2. Hmm maybe I will install SP3 (polish service pack ;) ).
Rike 26. Feb 2006	Name: Rike S/N: E7386;;84t5;478286q98::5932o5947792c39787;4438z3:57326566Z Same here, different results with the 'Enter' key, probably a different hash function. I think I'll stick to the good-ol' 'Verify' button.
CromaxX Author 27. Feb 2006	woh that's a very strange bug !! It never appears in the precedents crackmes ! I'll search for the source of this bug. Sorry...
l0calh0st 01. Mar 2006	Self keygen http://d.turboupload.com/d/397100/Keygen_d4_by_CromaMax2.rar.html
CromaxX Author 05. Mar 2006	Rike : I don't see any bug on several computers, so I can't resolve it for the moment, I'm sorry :/ l0calh0st : Are you sure your little keygen is working oO ??
acidflash 05. Mar 2006	l0calh0st: keygen not working here.. nothing in serial textbox after generate
ultrasound 05. Mar 2006	Id be interested to know when u resolve bug cromaxx, I can send u my oraculum if that helps in seeing some bad serials being generated.. :)
l0calh0st 05. Mar 2006	It was fine...Anway here is much much better than previous one ;) http://rapidshare.de/files/14747629/keygen_original.rar.html Keygen algo is so long
HMX0101 05. Mar 2006	l0calh0st: the selfkeygen not works.
acidflash 05. Mar 2006	l0calh0st: your new one doesn't work here either, just inserts a garbage char in serial textbox when I click generate. I have one working here (all my machines), maybe others can test? http://rapidshare.de/files/14781760/INTERNAL_KeygenMe__4_by_CromaxX.rar.html
acidflash 05. Mar 2006	Note: make sure you click generate button!
acidflash 05. Mar 2006	if that doesn't work set focus to name textbox and hit return.. it seems to make a difference :)
HMX0101 05. Mar 2006	I have modified the selfkeygen of acidflash, here the things changed: - The namebox is now centered - The serialbox is now readonly - The messages are eliminated - The about button is out - The appearance is differently For generate your serial, press once time enter copy and paste in the keygen and press twice times enter.
HMX0101 05. Mar 2006	oh i have forgot the link: http://rapidshare.de/files/14789777/Selfkeygen.rar.html
l0calh0st 05. Mar 2006	NOP your self kegen doesn't work on my machine :( Also mine is generating fine serials on m machine...it seems we are still missing something...If selfKeygen is troubling so much then what about KEygen :D
l0calh0st 05. Mar 2006	Ok here is difference my self kegen l0calh0st E33843453;t63;6526q338;23823o32;7;2:37c3:48937958z325:;638Z your's E33843453;t5697:54q39;6;2999o3:3;:6775c3:6427822:z3:57326566Z The first one is working fine on my pc
HMX0101 05. Mar 2006	press enter until generate the same serial that you :D the keygen generate various serial each time the button is pressed
acidflash 05. Mar 2006	it seems to generate different serials depending on if you click the generate button OR just hit enter while focus is in a textbox (2 different serials).. I just tested the 'hit enter with serial textbox in focus' and got a good serial (no click of generate button)
acidflash 05. Mar 2006	(testing with my orig version just so we are keeping track)
HMX0101 06. Mar 2006	i have tested to disable the button and press enter to generate and this not work, this is because you hit enter always in the generate button
l0calh0st 06. Mar 2006	no the serial is not correct...have you checked mine...http://rapidshare.de/files/14747629/keygen_original.rar.html and remember to CLICK generate rather pressing Enter and it is working on my pc Your kegen's serial by clicking the button E33843453;t5697:54q39;6;2999o3:3;:6775c3:6427822:z3:57326566Z by pressing enter E33843453;t532494q3:8:967;5o3:9524847c3:57946:::z3:57326566Z None of them work for me Correct serial working on my pc E33843453;t63;6526q338;23823o32;7;2:37c3:48937958z325:;638Z
l0calh0st 06. Mar 2006	and you have to click the crackme button not hit enter
acidflash 06. Mar 2006	l0calh0st: I get the same results with yours (latest). if I click button 1 get garbage in txtbox and if I hit return I get different garbage (no sign of a serial though).... We must be missing something, I'll peep mine again after work :)
acidflash 06. Mar 2006	I just posted one I verified works as long as you click button OR hit enter (just do the same for both orig and internal). The original does do 2 different serials depending if you click vs hit return. The internal at the following url generates for both. again please make sure you click button on both OR hit return on both.. http://rapidshare.de/files/14816086/internal3.rar.html
acidflash 06. Mar 2006	This was funny btw (in case anyone missed it, note the format string for serial): ASCII "C%dr%do%dm%da%dx%dX" CromaX 8-)
CromaxX Author 06. Mar 2006	Good work guy !! I don't know where you take bugs from, but some of your keygens works fine (on my pc oO) : Internal Keygen by acidflash : OK Selfkeygen modified by HMX0101 : OK If you want some help, only for verify, you can ask me on PM the keygen I made for (and also look if it works in your pc too !)
l0calh0st 06. Mar 2006	The new one works ok by clicking.....also mine works fine with clicking.just check it out and verify..i m getting mad..m kegen works fine on my pc http://rapidshare.de/files/14747629/keygen_original.rar.html ANYBODY PLZ CONFIRM IT remeber to clik both in self keygen and original crackme
CromaxX Author 06. Mar 2006	It doesn't works for me : Name : CromaxX Serial : P â€ Strange...
l0calh0st 06. Mar 2006	You have to click as i said not to press enter This is the one for you E;25:9632t:5::82:q4763268;6o45954969:c3:73::3782z3:57326566Z
HMX0101 06. Mar 2006	maybe the crackme, has a anti-selfkeygenning trick :D
Ox87k 06. Mar 2006	not hmx0101... my self-keygen work perfectly.. i test it in 3 pc. I don't send my solution because i haven't time for write a g00d tutorial but self-keygenning is possible. ;)
acidflash 06. Mar 2006	localh0st: yours gives me the same problems, garbage in the textbox (clicking or hitting return just gives different garbage).. So the click vs hit enter applies to yours also, just it puts garbage in.
l0calh0st 06. Mar 2006	hmm that's really strange...so the conclusion if it is so difficult to self keygen that who will made Keygen
HMX0101 06. Mar 2006	the best option for this crackme is a keygen :D
HMX0101 07. Mar 2006	my keygen is working, the solution coming soon...
ultrasound 11. Mar 2006	I have found with some tests that the keygen seems to base the serial on the opcodes of itself, as when I run a patched version of the program (to match the patches in oraculum) then my serials would be correct but when I do the same breakpoints in olly with the original version it gets a different serial, Cromaxx, before I go too far into this am I on the right track or is it coincidence?
HMX0101 11. Mar 2006	CromaxX, any serial that generate by the crackme is good but only work with OllyDbg putting a breakpoint in the strcmp, maybe the routine has a random number that generate different serial each time
CromaxX Author 11. Mar 2006	ultrasound : I think it's a coincidence. I hadn't make some protection like that oO ! HMX0101 : No, there aren't any random number.
Taliesin 03. Apr 2006	I've noticed the program acts differently depending on whether you enter name or serial first. I wrote self gen keygen, submitted to moderators. But only seems to work if you enter name first on both or serial first on both...doesn't work if you enter name first on one and serial first on the other.
l0calh0st 23. Apr 2006	Taliesin your keygen doesn't work on my pc :(
playar 25. Apr 2006	very very stranger... debug & release compile my code get diffrent result
playar 25. Apr 2006	here is my keygen ( include sourcecode) but sorry, no tutorial http://www.panzhishi.com/crackmes.de/06-04/Keygenme4.zip
Taliesin 26. Apr 2006	After discussing with l0calh0st, it seems the part I thought was constant (shl cl with cl = 6F when clicking ) isn't. Even that seems to be changing. I guess the only real way to get it working is self genning key.
Shism 26. Apr 2006	your keygen me didnt work playar

CromaxX's Nagged Crack-me

Download Nagged_crack-me_by_CromaxX.zip, 7 kb (password: crackmes.de)
Browse contents of Nagged_crack-me_by_CromaxX.zip

Very easy ! Replace nag by another nag : The good nag :) (packed crack-me)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 13. Nov, 2004
Downloads: 1823

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Solutions

Solution by Ic3D4ne, published 24. jun, 2005; download (530 b), password: crackmes.de or browse.

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Solution by Autolycus, published 23. nov, 2004; download (3 kb), password: crackmes.de or browse.

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Solution by Bytedevil, published 14. nov, 2004; download (475 b), password: crackmes.de or browse.

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Solution by haggar, published 14. nov, 2004; download (9 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Ganoes Paran 24. May 2009	I am a 'newb' on reversing and when i first tried this i just couldn't do it lol, was way to difficult. but i retried it after looking on other crackme's and i did it. was quite fun, i liked it =)
hironez 26. Aug 2009	Good I learned something. How to look for the solution in the right way. I am getting better. I already know some assembly so this one was easy but I leaned something also! =)

redoC 18. Jul, 15:45	pass: r........s
mrmacete 26. Jul, 13:27	i think more like r.......t
mrmacete 29. Jul, 18:31	oh, no you were right, finally got r2 to emulate this: https://asciinema.org/a/88nezce35db4uo28qvlk4y5vc (WARNING: spoiler inside)

Crosys's Brokes Lands Keygenme

Download Broken.Lands.2006.v1.zip, 57 kb (password: crackmes.de)
Browse contents of Broken.Lands.2006.v1.zip

Have phun =)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 20. Dec, 2006
Downloads: 699

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by r0ck, published 05. mar, 2007; download (45 kb), password: crackmes.de or browse.

r0ck has rated this crackme as quite nice.

Solution by HMX0101, published 28. dec, 2006; download (63 kb), password: crackmes.de or browse.

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Discussion and comments

DaBookshah 20. Dec 2006	No restrictions on what you can do?
DaBookshah 20. Dec 2006	Oops, so there are more details in readme.txt
Guetta 20. Dec 2006	Good work is design my friend, i'll look this right now ;)

Crosys's Keygenme 2007

Download Crosys-Keygenme-2007-BUGFIXED.zip, 41 kb (password: crackmes.de)
Browse contents of Crosys-Keygenme-2007-BUGFIXED.zip

KEYGEN IS ONLY SOLUTION!

have fun, any problems?

//Crosys 2007

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 27. May, 2007
Downloads: 916

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by waganono, published 15. jun, 2007; download (170 kb), password: crackmes.de or browse.

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Discussion and comments

Crosys Author 27. May 2007	So anyone tried it?
Guetta 27. May 2007	Yes, I'm actually working on it =) Dunno if I'll find solution but this one is interesting, thx bro !
HMX0101 27. May 2007	Mate, good work! But it have a bug... if you see ElGamal isn't necessary to get a valid serial for second part because last comparation is after second '-' and if this piece of serial is right return 1 and give Success!
Crosys Author 27. May 2007	yeah, really sorry about it, its fixed
waganono 29. May 2007	Very nice job! It's a pleasure to solve it. I have sent my solution to your @.
HMX0101 29. May 2007	waganono: are you going to write a tutorial?... it would be nice for all starter with elgamal :/ I've solved first serial, but second serial can't understand that thingy :(
waganono 30. May 2007	Yes i'll write one, just wait a bit less than 1 week, i have a lot of work. The elgamal scheme (generally) is not so easy to understand like RSA, i think.
boonz 30. May 2007	@HMX0101: If you need a tool for solving the DLP see hxxp://www.alpertron.com.ar/DILOG.HTM . It's very fast but don't forget to add 1 to your (p-1) so it's p!
HMX0101 30. May 2007	@boonz: that's only i can do with elgamal :P @waganono: thanx i will be waiting for it :)

Crosys's Keygenme 2008 v1.0

Download Keygenme2008-1_a.zip, 151 kb (password: crackmes.de)
Browse contents of Keygenme2008-1_a.zip

Keygen only solution.
This time its not long =).

Have fun everyone

/Crosys

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 11. Jul, 2008
Downloads: 517

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by fusss, published 14. jul, 2008; download (61 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 11. Jul 2008	Wooooowww.... nice to see you write sometime again! I guess this one is very harder :) Will take a look... thanks mate ;)
Crosys Author 11. Jul 2008	Hey mate, dont expect too much , its not very hard.. :) Have a nice time..
zart 11. Jul 2008	That one was mucho fun mate :) Nice to see another good keygenme... I try to write up a tutorial and keygen for it later one ;)
Crosys Author 11. Jul 2008	Thank you zart, you finished it?
zart 11. Jul 2008	Did a quick analyses of it - and understand most of it -- was able to get a valid key. Though this took me my whole extended lunch break! Hhahah - much fun... It was a nice break from trying to do that damned SDDecoder -- If I have a chance sometime soon I'll write up a tutorial and finish it fully with a keygen :)
Crosys Author 11. Jul 2008	1st serial is designed for beginners and 2nd serial no. is more harder..
zart 11. Jul 2008	Agreed! Experience will help people for the second serial a lot!
andrewl.us Moderator 11. Jul 2008	Being a damn number theorist helps for the second serial..
lord_Phoenix 11. Jul 2008	Got it. Wanna something more. ps. If you want - i can write a small solution
andrewl.us Moderator 11. Jul 2008	Constants: c0: 0x100A8731C4A45A47A0906B10 c1: 0xA8E276C5FDF00FA415C2283C c2: 0x8DA9A1C93977236D (prime) c3: 0xC4921F47591E845FB382B3C7 (prime) Serial syntax: "<dw0>-<dw1>-<dw2>" Let inv = 1/dw2 (mod c2) Let hash = Big(first 8 bytes of (MD5(dw0))) I think this is serial acceptance requirement: dw1 == [[c0^(hashinv(mod c2)) c1^(dw1*inv(mod c2))] (mod c3)] (mod c2) Is this correct? I don't have near the math skill to do this. Is it a particular cryptosystem we can study? Zart, I don't believe a word you say. Post your serial?
Ox87k 15. Jul 2008	My god, beautiful keygenme Crosys! Unfortunatelly i miss that one, i was away from home and now it seems to be too late :) @fusss: Great solution man ;)
the hoax 30. Apr 2009	Solved. I liked the first part best, since the DSA implementation was pretty straight forward.

crp-'s 888

Download 888.tgz, 984 b

make it print 'OK', no patching please :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 18. Oct, 2005
Downloads: 847

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by jvoisin, published 03. sep, 2013; download (5 kb), password: crackmes.de or browse.

jvoisin has rated this crackme as awesome.

Solution by taviso, published 06. jan, 2006; download (7 kb), password: crackmes.de or browse.

taviso has rated this crackme as quite nice.

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Discussion and comments

c_07 22. Jul 2007	Wow, even following along with taviso's well-explained solution, I am finding it hard to keep up! ;) As a first intro to linux RCE, I am enjoying this crackme!
c_07 27. Jul 2007	Thanks crp-... taught me a lot... esp. following the program flow ;D

crp-'s bf

Download bf.tar.gz, 3 kb

obviously the goal is to make a keyfile generator,
so no patches please.

get bonus points for a generic keyfile :)

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 24. Sep, 2006
Downloads: 964

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Solutions

Solution by macabre, published 02. oct, 2006; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

macabre 25. Sep 2006	Well, I got the username/number combo keygenerator now to figure out that keyfile... :)
macabre 25. Sep 2006	Ok got a keyfile generator. While mine is working fine it seems like there may have been an easier way. Might play with it a bit but if I don't see anything soon you'll just get the solution I have already :P Harder than I thought for a lvl 1 heheh

aton 20. Jan 2006	are you very sure this crackme does not contain malicious code? i see home directories being deleted at some guys box... might be a wrong positive though
crp- Author 20. Jan 2006	as i have not put such code in the crackme, and md5sums of the download on this site and my local copy still match, i'm _very_ sure that whatever deleted the home directories on some guys box, has nothing to do with this crackme...
crp- Author 20. Jan 2006	..and before everybody gets scared i'm happy to forward the sources for the crackme+packer to any moderator willing to give me an "malicious-code-free"-certificate ;)
aton 21. Jan 2006	now you get me :P i'd love to take a look at the source code. i think i can learn a lot from it. would you be willing to fork me a copy?
taviso 31. Jan 2006	He said "moderator"...no offense meant to aton, but I'd prefer the source code wasnt made available to just anyone...at least until a solution has been published, crp-'s crackme's are really great, I've completed 888 and been working on (and enjoying examining) collide for a few days, as soon as I've completed it I hope to try this one.
taviso 31. Jan 2006	incidentally, i've made a cursory examination of the code and see absolutely no evidence of anything malicious.

crp-'s trace-q

Download trace-q.tgz, 36 kb

no patches please, for more info:

look at the code :)

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 01. Jul, 2006
Downloads: 517

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Solutions

Solution by taviso, published 13. apr, 2010; download (92 kb), password: crackmes.de or browse.

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Discussion and comments

crp- Author 29. Sep 2006	hmm, so all linux reversers can be fooled by a few 0xCCs ? ;)
macabre 18. Oct 2006	I decided I had a little time to start looking at this. I'm not very deep into it yet...extracted the second app :P but it's a VERY interesting crackme. I'm sure this will be a fun one!!
macabre 25. Oct 2006	I know a lot about different pieces of this crackme but I still have not been able to solve it :( Too bad patches are not allowed :P I get confused when the child process read the memory of the parent process. So far, pausing the app when it's executing and attaching to it with a debugger that can modify the registers after the ptrace call seems to be where I am at now but have not been able to figure out what exactly it's looking for.... sigh. Good crackme crp-!!! :)
crp- Author 26. Apr 2007	you have given up macabre? its growing old :)

Crudd's crackhead

Download crackhead.zip, 2 kb (password: crackmes.de)
Browse contents of crackhead.zip

serial (diff. on each drive)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 24. Jun, 2000
Downloads: 2370

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Solutions

Send a message to CRY971C »

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Solutions

Solution by xylitol, published 29. jul, 2008; download (19 kb), password: crackmes.de or browse.

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Solution by obnoxious, published 29. jul, 2008; download (7 kb), password: crackmes.de or browse.

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Send a message to cryptcat »

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Discussion and comments

CRY971C Author 22. Jul 2008	My next release will be harder. It will be a while though because I haven't taken data structures yet. Again, after you get past the protection you should be home free.
costy 22. Jul 2008	How can i load it?? I feel confused.
Xspider 22. Jul 2008	hehe double click on Crackme.jar at least if you don't have JRE (Java Runtime Environment ) else download it from here: http://java.sun.com/javase/download/GenMe.zips/index_jdk5.jsp if my info was right :p
Bispoo 22. Jul 2008	ermm... you shouldn't be posting keygens here Ox87k....
Ox87k 22. Jul 2008	You shouldn't download it :)
costy 22. Jul 2008	Excuse me Ox87k could you make a solution explaining what have you done? I can't understand the crackme. I saw other crackme written in java but the solution are difficult to undertand becouse i know approximactly nothing about Java. Thank you.
CRY971C Author 23. Jul 2008	@0x Great job man, keep the solutions(keygens) out of the comments though so more people can learn. TIP FOR EVERYONE: The algoritm is as basic as it gets. Concentrate on getting through the obfuscation then the algorithm will be a sinch. Dont give up costy, java is a doll once you get to know her ;-)
~misunderstood~ 23. Jul 2008	solved. @CRY971C I know this doll well, for I have to deal with her within my studies...and I´d be happier if I hadn´t to. She owns long big teeth, yellow eyes and a devil´s smile...and she never heard about .exe-files. For personal painful reasons, I won´t write a solution :D ... I hope Ox87k will.
CRY971C Author 23. Jul 2008	@misunderstood You must be CompSci/SoftEng too eh? I guess it just goes to personnel opinion but I love java because if a system can run the JRE it can run java apps. This mean linux, osx(?) even mobile devices. It just seems harder to do cross platform compatibility with the windows API.
~misunderstood~ 24. Jul 2008	@CRY971C Yes, I am :). A lot of my fellow students love that language, and of course it has its adavantages. Your point with the cross platform compatibility is a good example. Anyway, as you said, it´s also a matter of personal taste and feeling...I just don´t like the feeling of coding in Java, for it´s a very strict/formal language (and not particularly suitable for the fast solution of problems, I think). Call me crazy, but it seems while coding, I just "don´t get through to her" :D. It´s like staying at the surface, while coding in C or even asm goes beneath it. Just my own experiences :)
~misunderstood~ 29. Jul 2008	@obnoxious: nice and well-written/understandable solution! :)
LFalch 04. Apr 2013	I may have found a glitch... there is a name that allows you to write whatever serial you'd like.
LFalch 04. Apr 2013	EDIT: The serial has to be the same as the name
LFalch 04. Apr 2013	There is a serial that allows whatever name
LFalch 04. Apr 2013	As long as it's 4 chars
LFalch 04. Apr 2013	I may have a glitch... I found a name where whatever you type as serial you've still completed it

cryptcat's CrackmeD

Download CrackmeD.zip, 136 kb (password: crackmes.de)
Browse contents of CrackmeD.zip

CrackmeD : Cryptcat
-------------------------
Language: D
Packers & Protection: None
2 - Needs a little brain (or luck).
-------------------------

Display the good boy message.
Write a keygen for the program.
Submit a tutorial to crackmes.de

~CryptCat~

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 05. Jun, 2007
Downloads: 611

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Discussion and comments

cryptcat Author 27. May 2007	How goes the reversing?
Zaphod 31. May 2007	Well, I have fished the serial for my name, but I don't know how it is generated...
Sturgeon 03. Jun 2007	[b]Zaphod[/b] How did you made it?
Zaphod 03. Jun 2007	Sturgeon: What puzzled me at first was how the program reads the entered name and serial. Once I found out about that and thereby found out where to break it was easy to fish the serial. I don't think I spoil anything by saying that the proggy uses WM_GETTEXT... cryptcat: I think there is a problem with the namelength. The name cannot be longer than 7 chars unless there is a separate algo for longer names ( which I can't find ). Is this intentional?
cryptcat Author 04. Jun 2007	I have a mistake in my code. I messed up how the name length is checked. I'll update the program.
hound 09. Jun 2007	Hmm, im really having trouble with this. There is soooo much random stuff in the crackme, and it won't break on anything. Any suggestions?
Zaphod 09. Jun 2007	cryptcat: I have made a keygen, but it only works if the name is four chars long. Is this intentional? hound: Try setting a conditional breakpoint on CallWindowProc, condition MSG == WM_GETTEXT
hound 09. Jun 2007	Sweet as, thanks for the help. Ive written a keygen too, its easy once I had the breakpoint ;). Thanks. The namelength is restricted to four characters only though.... 00403A88 . FF91 A0000000 CALL DWORD PTR DS:[ECX+A0] ;Converts name from unicode to ascii 00403A8E . 894424 10 MOV DWORD PTR SS:[ESP+10],EAX ;Store namelength 00403A92 . 895424 14 MOV DWORD PTR SS:[ESP+14],EDX 00403A96 . 837C24 10 04 CMP DWORD PTR SS:[ESP+10],4 00403A9B . 0F85 5F010000 JNZ CrackmeD.00403C00 ;If namelength != 4, jump (bad) Anyway, reasonably fun crackme. I suppose the hard thing about it is just all the random stuff, and finding where to break in the code (which I had help with....)

cryptcat's DKeygenMe

Download DKeygenMe.zip, 172 kb (password: crackmes.de)
Browse contents of DKeygenMe.zip

DKeygenMe
~~~~~~~~~
Objective:
:Create a keygen.
:No patching
Contents:
:No packers
:No protectors
:Multi-threaded
Language:
:D
Difficulty:
:4 - Needs special knowledge

~~~~~~~~~~~~
cryptcat
~~~~~~~~~~~~

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Unspecified/other

Published: 04. Jun, 2007
Downloads: 228

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cryptcat's KeygenmeL

Download KeygenmeL.zip, 564 kb (password: crackmes.de)
Browse contents of KeygenmeL.zip

KeygenmeL : Cryptcat
-------------------------
Language: ?
Packers & Protection: None
2 - Needs a little brain (or luck).
-------------------------

Display the congratulation message.
Write a keygen for the program.
Submit a tutorial to crackmes.de

~Cryptcat~

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 19. Jun, 2007
Downloads: 601

Rating

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Discussion and comments

hound 21. Jun 2007	uh, just wonder. Why are these crackme's so big?? 1.5mb is huge.
cryptcat Author 21. Jun 2007	They are all programmed with RTTI and garbage collected languages.
jseitz 22. Jun 2007	Rather new to this, is it required that you write a keygen? If so in what language?
zairon Moderator 22. Jun 2007	From the crackme rules: "Write a keygen for the program." You can use your preferred language, you decide. Please, submit source code too :)
cryptcat Author 27. Jun 2007	Has anyone reversed it?
Zaphod 29. Jun 2007	I can find where in memory the crackme stores the name and serial I write, but I just can't find where and how it uses this information! I have of course tried all kinds of breakpoints on name and serial, but that doesn't get me anywhere. Arrgh! Is the program written in LISP? ( There is this string: $L$I$S$P in several places ). I know absolutely nothing about LISP other than it is a programming language of some kind. If it is LISP, does one need a special tool to crack it?
cryptcat Author 29. Jun 2007	You are correct. It is written in Lisp.
cryptcat Author 04. Jul 2007	Everything in lisp is store as a list.

csfs's Crackmes4Begginers - Keygenme1

Download keygenme1.zip, 206 kb (password: crackmes.de)
Browse contents of keygenme1.zip

Find A Serial For Your Name

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 17. Jun, 2003
Downloads: 1983

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Solutions

Solution by g0dmoney, published 23. dec, 2003; download (15 kb), password: crackmes.de or browse.

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Solution by scarabee, published 27. jun, 2003; download (5 kb), password: crackmes.de or browse.

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Cthulhu's Cthulhu's Keygen-Me #1

Download Keygenme.zip, 243 kb (password: crackmes.de)
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Cthulhu's Keygen-me #1

This is my first Keygen me. Specially written to this great RCE site.
I Hope you have fun with it. GOOD LUCK!

Rules:
No rules ;-) Just create a valid keyfile and write a tutorial explaining how you did it.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 18. Feb, 2005
Downloads: 1118

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Discussion and comments

Tyren 28. Jan 2006	Dude, this is tough. Anyone else trying to solve this?
Ox87k 29. Jan 2006	700 downloads and no solutions? :\| Maybe the real difficulty is more than 2!
D4ph1 29. Jan 2006	I cant run this...:/
Ox87k 29. Jan 2006	Cthulhu, can u make a new 32 bit version of this crackme? :) (thanks!)
zairon Moderator 30. Jan 2006	I'm able to run the crackme. D4ph1 and 0x87k, can you give us more details about your problem(s)?
Cthulhu Author 30. Jan 2006	It would be nice that the author of the crackme receive some e-mail when someone post a comment on it. Some answers: 0x87k: It is a 32 bit prog. But I agree with you I would change it to level 4 but I haven't seen a way to do it. Tyren: You're doing a great job I think you are about to solve it. D4ph1: It runs well, what kind of problem are you having?
zairon Moderator 30. Jan 2006	>I would change it to level 4 but I haven't seen a way to do it. You can't change it, only mods can.
Cthulhu Author 31. Jan 2006	Hi Zairon! Could you change it for me, please?
D4ph1 31. Jan 2006	When I run it, nothing happens and when I loaded in Olly it says "Bad or unknow format of 32 bit executable"
Ox87k 31. Jan 2006	"Bad or unknow format of 32 bit executable" is the my same error!
HMX0101 31. Jan 2006	this is because NumOfRva <> 10, you can change this using a pe editor
Kerberos 31. Jan 2006	D4ph1: I'm sorry, but you're wrong. After loading into OllyDbg and running it by F9 CME is immediately killed by a little AntiDebug trick :)
D4ph1 01. Feb 2006	I run the crackme in win2k and it runs fine Kerberos : Maybe its antidebug trick but the crackme doesnt even run in XP as I said!It does nothing...
zairon Moderator 01. Feb 2006	D4ph1, I'm able to run it on xp-sp1 and sp2.

CuTedEvil's CuTedEvil-Crkme2

Download cutedevilcrckme2.zip, 2 kb (password: crackmes.de)
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Simple user/serial..?

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 18. Jul, 2002
Downloads: 2571

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Solutions

Solution by Lightning, published 22. jul, 2002; download (21 kb), password: crackmes.de or browse.

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Discussion and comments

neo_40 25. May 2008	they were pretty easy can some one please tell me how to make one of these please :)
Xspider 25. May 2008	@neo_40 are you asking how to do a crackme ?!

CuTedEvil's CuTedEvil First CrackMe

Download cutedevil_crackme_1.zip, 2 kb (password: crackmes.de)
Browse contents of cutedevil_crackme_1.zip

First Crackme. Simple username/serial crackme. nothing special.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 16. Jul, 2002
Downloads: 3590

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Solutions

Solution by HackeRMaN, published 09. dec, 2002; download (9 kb), password: crackmes.de or browse.

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Solution by bRaiN_faKKer, published 07. dec, 2002; download (6 kb), password: crackmes.de or browse.

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Send a message to cyberbob »

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Discussion and comments

XellenT 29. May 2007	the link for this tool is deas :( can u post me another one? thx
XellenT 29. May 2007	sorry i mean the link in the solution of Hackerman for the tool is dead
red477 29. May 2007	do you mean ollydbg??? see __ ollydbg.de ___
XellenT 29. May 2007	yes, but with this pluging'?
XellenT 29. May 2007	ok i got it, sry :)

costy 17. Jul 2008	Could someone tell me how to configure SmartCheck? I understood that this crackme try to close it's window. I patched it. Smartcheck now runs correctly but it gives my only few information. Thank you.
costy 17. Jul 2008	Another info. It's written in Pcode. I tried with VBdecompiler. It seems to have a lot of problem with this exe. Could someone give me an help?

cyberbob's The PowerPuff Girls

Download ppgcrackme.zip, 76 kb (password: crackmes.de)
Browse contents of ppgcrackme.zip

Long and a little bit time-consuming crackme

Difficulty: 7 - Very hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 16. May, 2004
Downloads: 808

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Solutions

Solution by MR.HAANDI, published 26. aug, 2007; download (606 kb), password: crackmes.de or browse.

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Send a message to CyberPro13 »

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Discussion and comments

cyberbob Author 28. Aug 2007	Good job and congratulation!
mm10121991 09. Nov 2010	Hey MR.HAANDI I expected using Index Calculus In you solution !

CyberPro13's CyberPro13 PatchMe 0x1

Download CyberPro13_PatchMe_0x1.zip, 13 kb (password: crackmes.de)
Browse contents of CyberPro13_PatchMe_0x1.zip

Simple crackme. Some old tricks, some stupid bugs. just PATCH it!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 03. May, 2007
Downloads: 1567

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Solutions

Solution by br0ken, published 21. aug, 2007; download (29 kb), password: crackmes.de or browse.

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Discussion and comments

br0ken 23. Jun 2007	I managed to patch the program to show the real good boy message when check! is pressed irrespective of the serial entered. I was just wondering if that is a solution? (haven't submitted it yet)
born2c0de 20. Aug 2007	I guess so. Since the author wants it to be patched, I guess a patch would be the correct solution.
br0ken 20. Aug 2007	Wow, that was a very late reply! Anyway, thanks! I've submitted my solution [ 2 days ago, just after sharpe's ]
Rapido 22. Feb 2009	i am newby br0ken you say: Patch MOV EDX,EAX to JMP 00401914 and your code.... i found this part but how can i patch this??
br0ken 22. Feb 2009	In order to patch, Double click on the MOV EDX,EAX A small box will appear. Type JMP 00401914 and press assemble (make sure the fill with NOP is ticked) Now right click --> Copy to executable --> All modifications. Click Copy all. Now a "file" window will appear. Now again right click and save file.
Rapido 23. Feb 2009	i have ollydbg 2.00 beta1 i do this but show this error: no room for this command keep size is ticked fill rest with nops is ticked what can i do?
br0ken 23. Feb 2009	Try using Olly 1.10

Download Angler.zip, 356 kb (password: crackmes.de)
Browse contents of Angler.zip

Angler By Cyclops
---------------------

Err....emm...What to say?
Another keygenme from me.
Nothing great, but i found it interesting, so here it is!

To Do :- Make a keygen+tut

Rules :- NO PATCHING, NO DIRECT BRUTE OF SERIALS(Hint?)

I like to see some explanation, rather than..."I donno what it is doing, i just ripped the code and bruted..lol"

Hint :- Some names may not have serials!

Greets to a lot of friends, you know it!

Regards,
Cyclops
http://cyclops.ueuo.com
http://crackmes.de

-Mera Bharat Mahan!

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 10. Mar, 2009
Downloads: 667

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by freesoul, published 11. mar, 2009; download (23 kb), password: crackmes.de or browse.

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Solution by andrewl.us, published 11. mar, 2009; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

freesoul 11. Mar 2009	I think I got it :O
freesoul 11. Mar 2009	found user: 1234567 serial: 7-49-3-13-50023625-72B885E9-4CEA1647-4D0B7065 but is normal that I can't found serials for a *LOT* of usernames?
freesoul 11. Mar 2009	FreeSoul 3-7-53-43-74B20BCF-630EC0BF-34551821-1B8E4FFB =)
andrewl.us Moderator 11. Mar 2009	Every name has a serial, keygen is only solution. Keep going freesoul! :)
freesoul 11. Mar 2009	True, even more than 1 :)... Done my keygen, my error was checking if number < number2 with signed/unsigned errors xD!!, now just need to do a tuto :D

cyclops's CALYPSO

Download Calypso.zip, 63 kb (password: crackmes.de)
Browse contents of Calypso.zip

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

...:: CALYPSO ::...

By

Cyclops

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

..::: Rating........... [ 3 ] :::..

..::: Compiler......... [ VC++ ] :::..

..::: Coder............ [ CYC ] :::..

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

+---+
|Aim|
+---+-----------------------------------------------------------------+
| |
| 1. Make a KeyGen. |
| 2. Write a tutorial about how u cracked. |
| 3. Write about the protection schemes. |
| |
+-----------------------------------------------------------------+

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

+----+
|Rulz|
+----+----------------------------------------------------------------+
| |
| No Patching,No Loderz,No Self KeyGens....... |
| |
+----------------------------------------------------------------+

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+-----------+
|Protections|
+-----------+---------------------------------------------------------+
| |
| 1. There are AntiDebugging tricks. |
| 2. There are some algo to calculate the serial. |
| 3. There are some functions to be Reversed. |
| |
+---------------------------------------------------------+

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

Good luck and have fun with this crackme..........

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+-------+
|Greetz |
+-------+-------------------------------------------------------------+
| |
| m@rio_crk,Taliesin,All my frienz at AIT and All |
| the memberz at crackmes.de !!! |
| |
+-------------------------------------------------------------+

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 15. Jun, 2006
Downloads: 833

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by josh, published 23. feb, 2012; download (42 kb), password: crackmes.de or browse.

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Discussion and comments

unicorn 19. Jun 2006	Hmm........ Long code forest ................. Any one tried it??/
Daemon 20. Jun 2006	Serial algorithms is not very interesting to me. I looked only on antidebug tricks. There are isDebugerPresent and FindWindow for OllyDbg. Dont keep this names in opened text form. Every disasm instrument show it.
c_07 21. Jun 2006	Interesting... Olly crashes (like literally a "Do you want to send an error report?" crash) every time. It seems to be doing this when it tries to call CreateDialogIndirectParam(). Does anyone have a reason why?
thehyper 23. Jun 2006	c_07,ollydbg crashes because of OutputDebugStringA trick. put a breakpoint on this function and look at the stack. you can also patch your ollydbg. it has been described in the forum.
c_07 24. Jun 2006	Many thanks, thehyper! I had no knowledge of this trick.
unicorn 29. Jun 2006	Ya found another One.RDTSC trick It checks for single stepping...... Serial is like this xxxxx-xxxx. It calculates 2 hashes from name.
josh 16. Feb 2012	Solved. Keygen and other stuff are in preparation. Here are some keys: Name: 123456 Key: RivgGmyR5l1fZ/jaM1gYzoqvP5czCjqfWn7VoryFIPsPD22Zq9NbXhIrZYclDn84o1C9Vjy1S1wDGLYjRKMxMjM0-741FC2C5 Name: Hello Calypso! Key: OHSj+vg2r7WknhJEVxpLr5xokdSaZM41A9PeUMnLEUI3syw3wRbu4QLYtdmvQx6PgueBvEZd64HC+EOKpDEy-49D93CC9

cyclops's CHAKRAVYUHA

Download CHAKRAVYUHA.zip, 133 kb (password: crackmes.de)
Browse contents of CHAKRAVYUHA.zip

Hi!

KeyGen this Beast!

Difficulty: U decide :p

Regards,
Cyclo

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 21. Apr, 2007
Downloads: 941

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by Zaphod, published 13. may, 2007; download (47 kb), password: crackmes.de or browse.

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Discussion and comments

Guetta 21. Apr 2007	Beautiful design & interesting code. Analysing the encryption is a real work, thx for this one Cyclop ! I'll try to solve it =)
sKiller 21. Apr 2007	Yes, i'll try to keygen it. :)
HMX0101 21. Apr 2007	Interesting, nice gfx and nice sfx (i like it a lot :)... btw, make a encryption routine wouldn't be easy ;P
Crosys 21. Apr 2007	yeah, cool one cyclops
cyclops Moderator 22. Apr 2007	Thnx Bros! Waitin for some quick solutions :D
mucki 23. Apr 2007	you are right - we have to solve it. i only enjoyed the nice layout / music yet ;)
cleverstones 24. Apr 2007	I will try it ,mybe
jB_ 25. Apr 2007	Nice crackme, as usual. It is pity that the ** is that short.
cyclops Moderator 28. Apr 2007	Yep, the ** is small, scaled down for the small encoding algo....
Zaphod 29. Apr 2007	Arrrgh! I get lost in all the switches, but I suppose that's the challenge. By the way, what is this ** you are talking about?
unicorn 29. Apr 2007	Nice sfx nd gfx...too many switch cases...may be itz a VM......
cyclops Moderator 03. May 2007	jB_ solved it! Grt work jB...
Zaphod 09. May 2007	Got it! Finally! I made a keygen, but this has been one tough job!

cyclops's CLR SerialMe 0x01

Download CLRSerialMe0x01.zip, 5 kb (password: crackmes.de)
Browse contents of CLRSerialMe0x01.zip

CLR SerialMe 0x01 By Cyclops
http://cyclops.ueuo.com

I was bored on a friday night, and coded this one in a snap.
It is a serial me, ie; u have to find a correct serial/serials :)

Rules: NO Patching, NO brute forcing.

It is fairly simple, and can be rated some 2 or 3.

Thanx to ARA for the idea, though he was scratching his head for almost 20 mins.

Regards,
-Cyclops
-Mera Bharath Mahan

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: .NET

Published: 26. Nov, 2008
Downloads: 545

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Solutions

Solution by Numernia, published 20. feb, 2009; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

shellwolf 27. Nov 2008	ERR:0xc0000135.
shellwolf 27. Nov 2008	ERR:0xc0000135 under winxp pro sp2
cyclops Moderator 27. Nov 2008	you must see what u are running :P It is .NET crackme, u need .NET runtime 2.0 :)
totalhack 29. Nov 2008	I know I am a noob but this thing crashes in Olly. My .NET is all in order.
totalhack 29. Nov 2008	Wait reading the Olly help file says it can't debug .NET apps. Is this my problem?
MulleDK13 29. Nov 2008	Try the .NET debugger: .NET Reflector (And plugin Reflexil) I don't do .NET programs, it's boring when it's real code instead of assembly -.-
totalhack 30. Nov 2008	Yeah I found .NET Reflector already. Definitely a lot easier to find out how it works, but I still can't solve it. I suck.
cyclops Moderator 30. Nov 2008	Not every one likes .NET. But, who cares!
indomit 02. Dec 2008	Good work cyclops! I like this one!
HMX0101 20. Feb 2009	Wow... I know you could do it ;) You're the best hehehe, congratz mate :) And cyclops, nice small piece of code :D Keep the good work, mates :)

cyclops's CLR SerialMe 0x02

Download CLR_SerialMe_0x02.zip, 5 kb (password: crackmes.de)
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CLR SerialMe 0x02 By Cyclops
http://cyclops.ueuo.com
http://crackmes.de

Again a small puzzle.
Your task is to find a correct serial. As the code is in C# .NET, the source can be obtained by Reflector.

The only obfuscation here is my coding style and the Visual Studio Compiler :D

Rules: NO Patching, NO brute forcing.

You may exploit some flaws in checking function if you can find any!

Regards,
-Cyclops
-Mera Bharath Mahan

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: .NET

Published: 23. Feb, 2009
Downloads: 480

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by gemigis, published 05. mar, 2009; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

Filler 25. Feb 2009	Nice one. Without patching is it not an easy Task! =D
Numernia Moderator 25. Feb 2009	Very nice one cyclops =) got this one sorted out aswell
simonzack Moderator 27. Feb 2009	took me a while to get it :p cause deducted a lot of combination until there were only few, then hand-tried the combination is this one related to any mathematical theory? (i.e. easier way to do this?) thanks
cyclops Moderator 27. Feb 2009	Not theory, but a puzzle(I don't know if it is well known). Won't be taking much time(Indomit is already there :)
simonzack Moderator 28. Feb 2009	what i mean is i have solved it also :) just wanted to know if there's an underlying theory
cyclops Moderator 28. Feb 2009	A tut will be nice :)

cyclops's crackme2

Download crackme2.zip, 10 kb (password: crackmes.de)
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simple keygen

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: C/C++

Published: 02. Jan, 2005
Downloads: 1668

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Solutions

Solution by kRio, published 03. mar, 2005; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

falcon_1 26. Dec 2015	Immunity Debugger could not open the exe file
deibiz_xxl 02. Jan, 12:03	falcon, it is for DOS...

cyclops's cyclops

Download cyclops.zip, 4 kb (password: crackmes.de)
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serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Apr, 2004
Downloads: 3748

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Solutions

Solution by thundershot, published 24. jun, 2004; download (943 b), password: crackmes.de or browse.

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Solution by code_inside, published 27. apr, 2004; download (829 b), password: crackmes.de or browse.

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Solution by Plasmator, published 27. apr, 2004; download (10 kb), password: crackmes.de or browse.

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Solution by xyzero, published 27. apr, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by nEo_TheOne, published 27. apr, 2004; download (511 b), password: crackmes.de or browse.

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Discussion and comments

cyclops's cyclops crackme3.0

Download crackme3.0.zip, 821 kb (password: crackmes.de)
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Third crackme

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 25. Jan, 2006
Downloads: 994

Rating

Votes: 5
Crackme is nothing special.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

Shism 29. Sep 2005	i can run this one
cyclops Moderator 27. Jan 2006	The crackme worked on every system i tested. U have to just unzip the files into a folder & run the exe No need to download any dlls .I have included all the nessessary dlls.I tested on sysems which have no VC++ It worked nicely.

cyclops's cyclops crackme 4.0

Download crack#4.zip, 6 kb (password: crackmes.de)
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crackme 4.0

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 01. Feb, 2006
Downloads: 993

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Solutions

Solution by Kerberos, published 03. feb, 2006; download (45 kb), password: crackmes.de or browse.

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Discussion and comments

bLaCk-eye Moderator 03. Feb 2006	haqqar: works for me, i have xp.
HMX0101 03. Feb 2006	on my two machines, it works perfectly (Windows XP SP2 and Windows ME)
wisp 19. Jan 2007	Kerberos has a little error in his solution. He treated lines 004019A2 AND EAX,800000FF 004019A7 JNS SHORT 004019B0 004019A9 DEC EAX 004019AA OR EAX,FFFFFF00 004019AF INC EAX 004019B0 ... as eax = abs(eax) & 0xFF But this isn't right in case of negative value in eax. In fact these five lines mean simple eax = eax mod 256. If eax has negative value the remainder after division will be <=0. The negative values apear because chars are treated as signed chars here. And this seems to be an Cyclops's mistake (or not ;-) ) Anyway if name you use to register has only chars with codes below 128 (english letters, numbers) yout won't feel the difference.

cyclops's cyclops crackme 5.0

Download crackme5.zip, 41 kb (password: crackmes.de)
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crackme 5.0

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 30. Sep, 2005
Downloads: 1325

Rating

Votes: 6
Crackme is quite bad.

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Solutions

Solution by ultrasound, published 02. oct, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by NoRG, published 02. oct, 2005; download (735 b), password: crackmes.de or browse.

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Discussion and comments

Ank83 11. Dec 2005	CrAcKiNg Is CoOl indeed
*DNison** 15. Jul 2009	can w32dasm be used instead of IDA to dissasemble this file

cyclops's Dongle Me

Download Dongle_Me_-_Cyc.zip, 105 kb (password: crackmes.de)
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Dongle Me By Cyclops
-------------------------

Acceptable solution:
1. A hardware(you can send it via snail mail..lol). Schematic, firmware, information and some pics/video will do.
2. A custom dongle emulator program.
A separate keygen is much appreciated ;)

Level: It is fairly easy. Both dongle and crypto.

Tested on: XP SP3, Vista x86, Vista x64

Greetings to my friends, especially the ones over #crackmesde on dalnet.
Thanks to Sam for a quick GFX, J&J for HW support.

http://crackmes.de
http://cyclops.ueuo.com

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 27. Apr, 2010
Downloads: 615

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Discussion and comments

Xspider 27. Apr 2010	nice one from ya cyclops :D i guess this is the 1st crackme which uses dongle in crackmes.de !!?
EvOlUtIoN 28. Apr 2010	Interesting one, what a keygen means exactly in this case?
cyclops Moderator 28. Apr 2010	There are some calculations which makes the dongle verified. You have to reverse that part for the keygen(keygen is 2nd part, for first part you have to make a dongle).
Coderess 28. Apr 2010	I think that good idea
Numernia Moderator 28. Apr 2010	very good one!
Hack_ThE_PaRaDiSe 28. Apr 2010	I would like to see a solution of this one, since I have no dongle experience. Im more interested in the coding part regarding the emulator.
qpt^J 04. May 2010	well, i have analized crypto part of this crackme i found that crackme uses ECNR and i have a few questions as r=G*rnd+m (mod q) and v must equal to message in ECNR, how to sign r for user name if v^EA3AB084510=m (mod q) where m = Crc (user name), or i am doing something wrong.. and how much time needs for solving ECDLP ?
xylitol 05. May 2010	Like HTP, waiting for a solution This one seem great :)
cyclops Moderator 06. May 2010	@qpt^J: 40% of queries I cant understand..sorry! ECNR -> Correct r=G*rnd+m (mod q) -> Correct how much time needs for solving ECDLP ? Pretty long time, until and unless you find an easier way (plz, dont patch!). PM me if you need further help with ECNR:)
_ghandi_ 06. May 2010	I thought i'd see what was involved in writing a virtual device driver, but now that i see this has an ECDLP factor, i'm not going to try because i don't know the first thing about solving ECDLP. Congrats on writing a nice crackme though Cyclops!
divinomas 21. May 2010	Interesting crackme, cyclops. It seems lots of PS3 could help solve this ECNR. ;)
cyclops Moderator 21. May 2010	Yes, divinomas! around 200 iirc ;)
Hack_ThE_PaRaDiSe 24. Feb 2011	I havent seen any solution so far, so I decided to take a look at it. I noticed that it starts by enumerating the devices, and each time it manages to get a valid handle calls the HidD_GetAttributes function where there is a call to the DeviceIoControl win API: 73561ABA 52 PUSH EDX 73561ABB 51 PUSH ECX 73561ABC 51 PUSH ECX 73561ABD 68 A8010B00 PUSH 0B01A8 73561AC2 50 PUSH EAX 73561AC3 FF15 24105673 CALL DWORD PTR DS:[<&KERNEL32.DeviceI>; kernel32.DeviceIoControl I took a look at the control codes in the MSDN but i did not find anyone matching B01A8, and unless I missed something think I tried them all to see the corresponding constant. Any tips?
KKR_WE_RULE 24. Feb 2011	Seen the ECNR part aswell, but I have only one PS3 ;p Cyclops, Numernia, qpt^J : can ya send some 199 more ps3(s) to my address ;p (kinda 199 div 3) ;p
cyclops Moderator 02. Mar 2011	@HTP: HidD_GetAttributes is a standard API. Instead of going into its details, try to understand why/for what it is used. That will be a much better approach :) @KKR: people who have 200+ PS3s already done it, ask em :P
josh 06. Mar 2012	Maybe there is a solution for crypto-dummies and non-gamers! The crc is the weak link (together with the sloppy report length checking...)

cyclops's Jade

Download Jade.zip, 6 kb (password: crackmes.de)
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This is some thing different from others....
No crypto....But some thing else....

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: C/C++

Published: 26. Jul, 2006
Downloads: 759

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by redoC, published 16. jul, 2010; download (40 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 26. Jul 2006	What we should do for register?
X-Treem 26. Jul 2006	uhm it's waiting for something via Socket. Port 8241 :) seems to be looking for some text like ---...:: [CYc] ::...--- but then boh...
cyclops Moderator 29. Jul 2006	Yeah...ur in rigth way X-Treem....
KXSQ 30. Jul 2006	NICE CRACKME,BEHAVE AS LIKE A FTP LOGIN SESSION, THANKS CYCLOPS,I FINISHED THE KEYGEN
unicorn 19. Aug 2006	Nice one. Threads working cool.

cyclops's KeyGenMe-iNF1

Download KGenMe-iNF1.zip, 4 kb (password: crackmes.de)
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Small Krypto KeyGenMe.

Create a KeyGen.
Dont patch, brute-Force.....

Good Luck!!!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 18. Sep, 2006
Downloads: 796

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Solutions

Solution by crp-, published 24. sep, 2006; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 18. Sep 2006	Very easy, nice job cyclops... Maybe i write a tut+keygen this week :)
geeko 20. Sep 2006	must the geygen accept any string in the 'name' box? or just those which have some property?
geeko 20. Sep 2006	or can I generate pairs of name/key?
cyclops Moderator 20. Sep 2006	Itz a keygenme...SO it has to accept any string in name. Whatz the property?
m@rio_crk 20. Sep 2006	nice try HMX0101 :) - "Dont patch, brute-Force....."
HMX0101 20. Sep 2006	Hehe, i didn't find another way to solve it :P I'm not very good with the maths :)
jB_ 21. Sep 2006	HMX0101: check modular arithmetic algorithms on google. A very well known algorithm may help you.
geeko 21. Sep 2006	I riched the step as HMX did, but didn't upload coz it's brute force. Why not brute force dirrectly the serial into the edit box?
geeko 21. Sep 2006	cyclops, are u satisfied?
geeko 21. Sep 2006	the problem is resolving this equation: (a*x+1)/b=z find out a pair of (z,y) integers. Knowing thet a and b are integers too. I couldnt do without brutforce, could you?
geeko 21. Sep 2006	I think it can't be done
cyclops Moderator 21. Sep 2006	Hmm... I was out of station for some time.So... @HMX0101: Sorry ur solution violates "Patch/Brute Force". Plz follow what jB has said. @MOD: Plz DELETE the DOLUTION By HMX0101.I think i have given the details abt the keyge. @geeko: Itz not impossible.try harder. @jB & mario: I know u guyz have already solved it...dont you??
jB_ 21. Sep 2006	cyclops: of course. It was not really challenging, but ok. One of the routines every beginner has to learn :) I will send you the keygen tomorrow if you're interested.
HMX0101 21. Sep 2006	Sorry, i going to study this method to solve it and submit it later...
crp- 21. Sep 2006	the crackme has a small bug. for roughly 1/0x1234th of all possible names, no valid serial exists.
cyclops Moderator 24. Sep 2006	THANKS FOR TRYING THIS CRACKME....
HMX0101 24. Sep 2006	I can't found an algorithm to solve this :(

cyclops's NTS-Crackme1

Download NTS-Crackme1.zip, 2 kb (password: crackmes.de)
Browse contents of NTS-Crackme1.zip

Hi All,

This is the first crackme of my crackme series NTS(Neiwbie Cracking Series)

Hope u enjoi the crackmes......

Regards,

Cyclo

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: Assembler

Published: 23. Dec, 2006
Downloads: 1541

Rating

Votes: 8
Crackme is boring crap.

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Solutions

Solution by Sepehr, published 27. jun, 2008; download (4 kb), password: crackmes.de or browse.

Sepehr has rated this crackme as boring crap.

Solution by migol, published 15. apr, 2007; download (2 kb), password: crackmes.de or browse.

migol has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

AK87 28. Dec 2006	prolly the easiest crackme ever :) good job though..
macabre 28. Dec 2006	I don't know if it's the easiest.... have you seen NTS-crackme2? :P hehehehe It's a good series for newbies tho... should provide a link with all ten in a tarball to distribute or something....
cyclops Moderator 28. Dec 2006	may be this will help h++p://cyclops.ueuo.com/crackmes/nts/NTS.rar contains all 10 crackmes. Hope u like it!!!
Icey 09. Feb 2007	If it's so easy then why hasn't anybody submitted a solution yet? :P
Zaphod 09. Feb 2007	It is too easy - probably nobody would need help with this one :)
imsangha 22. Mar 2007	I'm a newbie and I solved it! I'm soo excited!
MarvCrack 24. Mar 2007	nobody left a solution coz ppl have to code their own loader or patcher.
mucki 24. Mar 2007	if you want you could have my loader and patcher, but i think there is no need for a solution.
migol 14. Apr 2007	easy one, i'll try to crate a solution for it
Drakenza 03. Jun 2007	heh, just cracked it. Good crackme, nice for all the newbies who have no confidence and need a quick easy one to teach them the basics. Submitted a tut, but hopefully no one needs it :)
br0ken 06. Jun 2007	I changed JNZ to JE. Is that a solution?
nEwDaLs1 13. Jan 2009	Ok so I managed to get the registred Message without doing all that crazy stuff everyone else did. i went to Address 0040100D and Changed 75 13 to 74 13 and ran it. Worked.
hinko 07. Sep 2010	nice1 for refreshing intel instruction set .)
Dr.AnTi_HaCkEr 02. Mar 2012	<h1>its easy<h1>

cyclops's NTS-Crackme10

Download NTS-Crackme10.zip, 22 kb (password: crackmes.de)
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NTS(Newbie Cracking Series)-Crackme10

Regards,
Cyclo

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: C/C++

Published: 23. Dec, 2006
Downloads: 1036

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by TheColonial, published 08. mar, 2007; download (247 kb), password: crackmes.de or browse.

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Discussion and comments

Ank83 24. Dec 2006	WOW. What a nice way to write a book about cracking. All the work will be done by others :))) 10 point for creativity. Best Regards Ank83
cyclops Moderator 24. Dec 2006	Thanx Ank, hope u enjoi the crackmes.... Happy X-Mas to all..... Regards, Cyclo
hardcoder 24. Dec 2006	You cannot miss judge this crack me, this is not that easy that you mentioned in the readme.. Really very good crackme I'd rate this 2. I enjoyed playing with it... RDTSC,and initial exception trick is interesting... KeyGen is toooo simple........ Keep it up man, regards
DaBookshah 25. Dec 2006	Even though the section beginning with 004010D9 . 64:A1 30000000 MOV EAX,DWORD PTR FS:[30] 004010DF . 8B40 0C MOV EAX,DWORD PTR DS:[EAX+C] stands out pretty obviously, and I bypassed it, I don't understand it :(. Can someone enlighted me?
Bswap 25. Dec 2006	Good Crackme I like it ! ;)
Zaphod 05. Jan 2007	Cyclops, I have found the correct serial for my name ( and also written a keygen ), but I had to activate the HideDebugger-plugin to do it. Without the HideDebugger I can't. I think that's because I don't know what these MFC42-functions do. Do you know where to find a list of the functions and some documentation? The only thing I know about MFC is that it means Microsoft Foundation Classes, but that doesn't help much...
l0calh0st 08. Jan 2007	No Zaphod....Theseare WinAPI calls that are preenting you from debugging..... Hint : Check in string references.....and there is exceptions trick too and another one which you have to find :P
Zaphod 08. Jan 2007	I don't know how the OutputDebugString-trick works, but I can bypass it by changing two bytes. But there is still the IsDebuggerPresent-thing that gives me problems. It it not enough to nop it out. Hmmm...
cyclops Moderator 08. Jan 2007	U can by pass it by changing the je/jne to jmp or change the return value of the call..
cyclops Moderator 08. Jan 2007	OutputDebugString exploits the format string of the ollydbg.some thing like this printf(str);.if u give str as format strings like %s it wil fetch args frm stack nd try to get strings from arbitrary locations. This creates the exception
Zaphod 08. Jan 2007	Cyclops, I did try changing je to jne, but the program still exits. There must be one more trick connected to this? What I don't understand about the OutputDebugString is that the ApiHelp says that the string is output to the debugger and displayed. Displayed where? I changed %s%s%s... to A,0 and it works. But I don't know where the A would be displayed.
Zaphod 08. Jan 2007	Okay, now I found it! It has to do with the FS:[18] stuff - what that means, however, I don't know :(
TheColonial 02. Mar 2007	Hi all. I've submitted a solution, hopefully it'll get through moderation soon. I only used IDA to solve it, and had no issues getting round the debugger check. It would have been harder had it actually constantly run on a separate thread, but thankfully once on startup made it very easy! For more info, read the solution :) I would apprecicate any feedback.
ARCHANGEL 03. Mar 2007	TheColonial, you are really cool reverser if you could do that, well done:)
Ox87k 03. Mar 2007	ARCHANGEL: where is the problem!? anti-debug part? For a keygen, just attach to the process :P
TheColonial 05. Mar 2007	ARCHANGEL: Solution is now available. 0x87k: Isn't the purpose of this entire website to learn and share your solutions? Just "attaching" to the process is hardly going to help others learn. Thanks guys.
Ox87k 05. Mar 2007	TheColonial: surely about this site but my comment wasn't a critic but just a little hint for a quick method to keygenning it. This crackme is level2 and then if someone try it, that suppose (maybe) that he isn't a very very very newbie, right? So, i told you another method to solve it. Nothing more.. Please sorry if my post has given a wrong impression.
TheColonial 05. Mar 2007	0x87k: No need to apologise :) I didn't mean to be rude either. I was just making a point. You're right, your comment does give newbies a hint. Cheers :)
TheColonial 08. Mar 2007	Hi All. Zairon has informed me that my keygen crashes when he runs it. The reason is that the MS VC++ libraries that come with Visual studio 2005 SP1 need to be installed. You can download these redistributables from here: http://www.microsoft.com/download/NTS-Crackme10.zips/details.aspx?familyid=32BC1BEE-A3F9-4C13-9C99-220B62A191EE&displaylang=en I am sorry, but I don't want to include those in the zip file. Cheers T.C.

cyclops's NTS-Crackme2

Download NTS-Crackme2.zip, 2 kb (password: crackmes.de)
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NTS(Neiwbie Cracking Series)-Crackme2

Regards,
Cyclo

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: Assembler

Published: 23. Dec, 2006
Downloads: 1409

Rating

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Solutions

Solution by sharpe, published 26. jan, 2007; download (34 kb), password: crackmes.de or browse.

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Solution by Ank83, published 01. jan, 2007; download (38 kb), password: crackmes.de or browse.

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Solution by boof, published 01. jan, 2007; download (591 b), password: crackmes.de or browse.

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Solution by boonz, published 01. jan, 2007; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Drakenza 03. Jun 2007	Wow, that was easy. Cracked in a matter of seconds. I think this was easier than NTS1. I won't upload a tut because there's so many, unless someone really wants me to :D Nice crackme, cyclops.
Texas42 25. Jul 2007	very easy too nice indeed
hinko 07. Sep 2010	nice tutorial, thanx cyclops
Dr.AnTi_HaCkEr 02. Mar 2012	thnx its very easy bro ;)
tekwizz123 21. Jan 2013	Very easy challenge but nice for people like me who haven't done serial fishing before.

cyclops's NTS-Crackme3

Download NTS-Crackme3.zip, 7 kb (password: crackmes.de)
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NTS(Newbie Cracking Series)-Crackme3

Regards,
Cyclo

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: C/C++

Published: 23. Dec, 2006
Downloads: 1373

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by Rayden, published 03. jan, 2007; download (131 kb), password: crackmes.de or browse.

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Solution by mucki, published 03. jan, 2007; download (72 kb), password: crackmes.de or browse.

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Solution by Ank83, published 03. jan, 2007; download (107 kb), password: crackmes.de or browse.

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Solution by boof, published 03. jan, 2007; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Markus 29. Dec 2006	Thanks, this being the first crackme I've tried I thought it was great (Not too hard/easy for a first).
Rayden 02. Jan 2007	Nice crackme, Cyclops. Thanks :)
ouchast 05. Jan 2007	"BYTE PTR SS:[ESP+9],2D" Ok, so I've understood that 2D is hex for '-'. But how do you know where to place it? SS = Stack Segment? PTR = Pointer to Right? And what does ESP+9 mean? As you can see, I'm realy new to this, hope Im not getting flamed for these questions :)
Rayden 06. Jan 2007	at ESP+04 the first char of your serial is located. considering you entered an 8-char serial, the last char is located at ESP+0B.
SaXoN 10. Jan 2007	I simply dont understand it, at "BYTE PTR SS:[ESP+9],2D" im writing "-" 8 times (to bypass the first jnz) but it still freaking jumps at the second jnz, it shouldnt?!
Ebba 03. Feb 2007	i like this crack me.. ^^
imsangha 22. Mar 2007	I loved this crackme! Thanks! :D
migol 14. Apr 2007	nice one, still need to think about it (2 a.m. is a bit late) ouchast: notice, that in Windows on protected mode there are no segments, i.e. DS=ES=FS=GS=SS
Drakenza 03. Jun 2007	Wow, big jump from NTS1 and 2. Solved it, but it took longer... :D
NanoyMaster 11. Jun 2007	is it cheating if I jusn nooped out all the jumps so it always passes? sorry for the noobish question XD
br0ken 13. Aug 2007	Nice one. Being a newbie, i needed calc.exe and an ASCII table to solve this one!
hinko 07. Sep 2010	another brain teaser .. like it!!!!
sir_edmar 08. Sep 2010	solved it. thats some crazy serial :D took me about halb an hour... but it was a big step from nts1 and nts2 to this one. but good. keep it up. thanks for this crackme!

cyclops's NTS-Crackme4

Download NTS-Crackme4.zip, 8 kb (password: crackmes.de)
Browse contents of NTS-Crackme4.zip

NTS(Newbie Cracking Series)-Crackme4

Regards,
Cyclo

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: C/C++

Published: 23. Dec, 2006
Downloads: 1262

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by sir_edmar, published 14. sep, 2010; download (51 kb), password: crackmes.de or browse.

sir_edmar has rated this crackme as awesome.

Solution by 357*, published 02. mar, 2007; download (11 kb), password: crackmes.de or browse.

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Solution by hound, published 23. feb, 2007; download (4 kb), password: crackmes.de or browse.

hound has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

macabre 29. Dec 2006	How long is the key to bruteforce? I've gone above 5 chars alphanumeric and still no hits. I'd rather not run the brute forcer for very long just to write a tutorial...
cyclops Moderator 29. Dec 2006	Lol...the serial reads only 5 chars with \0. So a max of 4 chars...
macabre 29. Dec 2006	wow that's strange...maybe I should add symbols...either that or I copied the wrong serial down!!... :0 hehehe
macabre 29. Dec 2006	Ah crap... I wrote the serial down wrong... sigh :P ... turns out, when you write the serial down right it takes only a few seconds... I'm going back to sleep. lol
mucki 13. Feb 2007	could anyone please submit a tutorial? i guess i checked each character i could find on my keybord but serial is still wrong :(
hound 13. Feb 2007	Ill post mine up tonight
macabre 13. Feb 2007	I have a keygen with source but it's only been tested on linux. I should have written a tutorial at the time I cracked it but I didn't write down any notes :(
mucki 23. Feb 2007	I thought serial contains 4 chars, it's clear that I didn't got a result!
kilobyte.asm 13. Jun 2009	nice...the challenge here is coding the bruter. Decided to code it in asm, newbie here so don't look too much at my hackish coding habits. code: http://pastebin.com/f14fc369 screenshot: http://tinyurl.com/nts-crackme4 thanks cyclops for a wonderful crackme, 4 down 6 to go :P

cyclops's NTS-Crackme5

Download NTS-Crackme5.zip, 21 kb (password: crackmes.de)
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NTS(Newbie Cracking Series)-Crackme5

Regards,
Cyclo

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: C/C++

Published: 23. Dec, 2006
Downloads: 1734

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by sir_edmar, published 14. sep, 2010; download (55 kb), password: crackmes.de or browse.

sir_edmar has rated this crackme as quite nice.

Solution by boof, published 08. jan, 2007; download (1122 kb), password: crackmes.de or browse.

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Discussion and comments

macabre 28. Dec 2006	Perhaps I'm missing something but the first check on the serial seems flawed. Ex: Say I use: name: macabre serial: 3F572C90-E7E1EAD0-AF248278-A07E801C because the strcmp section used (00401390) checks "3F572C90-E7E1EAD0" against a string generated with %08X-%08X 2 bytes at a time... issue is the generated string is not even (because of the '-') so the last byte check is a NULL \0...and we can't possible end our serial here because we have another section to check. As far as I can tell even if I generate the 'proper' serial it won't pass the strcmp like function.
macabre 28. Dec 2006	I believe this could be fixed by testing for null before doing the CMP. I think TEST CL,CL should come before the CMP DL,BL
cyclops Moderator 29. Dec 2006	I have got the same query from my frndz also. All i tell is, " Look CARE FULLY at sscanf()".....
macabre 29. Dec 2006	lol... crap... got schooled by sscanf() Ok, now I got it working :P Thx!!
snakies 17. Jan 2007	thanks for the heads up. i was scratching my head for the same reason. got it working now though thanks. now to create a keygen. thanks for my first crack ever!
kilobyte.asm 16. Jun 2009	thank God for online linux man pages
sir_edmar 09. Sep 2010	finally! i got my keygen working! this one fucked my brain very hard! i really need to learn asm better :)

cyclops's NTS-Crackme6

Download NTS-Crackme6.zip, 8 kb (password: crackmes.de)
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NTS(Newbie Cracking Series)-Crackme6

Regards,
Cyclo

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: C/C++

Published: 23. Dec, 2006
Downloads: 815

Rating

Votes: 3
Crackme is good.

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Solutions

Solution by hound, published 18. jan, 2007; download (36 kb), password: crackmes.de or browse.

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Discussion and comments

boof 08. Jan 2007	i need some help with this crack me..so if anyone wanna try to help me please PM me..thank you guys
hound 09. Jan 2007	I'l write up all my working once Ive finished. Im kind of stuck on some little bits but I think I should get it knocked out at some stage soon :<. Anyway Im loving all these crackmes so far! Thanks very much cyclops!
hound 09. Jan 2007	Hmm ok Ive re-written the algo that generates the 1st bytes from the 2nd bytes, but Cyclops I can't get this to work due to the movsx instruction when the program checks! Is this intentional? 0040145C MOV EAX,EBX 0040145E CDQ 0040145F IDIV ESI 00401461 MOVSX ECX,BYTE PTR DS:[EDX+EBP] 00401465 XOR EDX,EDX 00401467 MOV DL,BYTE PTR SS:[ESP+EBX+10] 0040146B CMP EDX,ECX 0040146D JNZ SHORT Crackme6.00401475 0040146F INC EBX 00401470 CMP EBX,1E 00401473 JL SHORT Crackme6.0040145C The problem is that, any byte generated from the algo that is greater than 7x, the movsx causes this above comparison to fail :<. If it was MOVSZ, the comparison would be fine. I originally overcame this by finding an input that generated only bytes less than 7x. However, as the input string is limited to only 1E bytes long, but the generated bytes is less (for every 4 input, 3 output bytes), the comparison actually runs PAST the calculated bytes (Cmp EBX, 1E). Please get back to me on this. Cheers.
hound 09. Jan 2007	Sorry for the triple post! !Anyway I think the problem is the MOVSX instruction, and the final statement (CMP EBX, 1E). As the movsx 'corrupts' input, and the bottom statement actually checks past the information loaded from Key.cyc.
cyclops Moderator 09. Jan 2007	Itz a little tricky. Experianced crackers can figure out the algo easily(from the 4 bytes to 3 byte ). Gud luck!
hound 09. Jan 2007	Ive figured out the algo, and re-written in C and it matches up fine. The problem is that the comparing function reads further past the algo it generates......
hound 09. Jan 2007	Oh hang I think Ive figured it out now.....Didn' realise that the gets function read 1F bytes. Thought it read 1E......
boof 09. Jan 2007	baaaaaaaaah ! i cant figure it out i need help
hound 09. Jan 2007	Yay! I finally finished..... man that was a mission. Ill post up my solution later today with all my working.
boof 10. Jan 2007	i must be missing something cuz i cant figure it out :(
Zaphod 13. Jan 2007	Got it! Finally! And I think it's more than a little tricky. I have a working keyfile, but I don't think I can make a keyfile-generator...
hound 14. Jan 2007	I wrote up all my working, and the source to my keyfilegen is in my solution. Just have to wait till it is posted.
Zaphod 14. Jan 2007	As far as I can see there must be an infinite number of correct keyfiles, so how can you make a generator that eventually lists them all?
cyclops Moderator 14. Jan 2007	Think like a keygen... For each name therz a key.
Zaphod 14. Jan 2007	But in CrackMe6 you don't enter a name. So the valid keyfiles are valid for all names - and there are LOTS of valid keyfiles...
hound 14. Jan 2007	You know how the algo makes a hash from the 2nd part of the keyfile? Just make a random string generating function to make the 2nd part of the keyfile, then copy the algo to make the first part. You then have to check it wraps around correctly. You then have the keyfile.
Zaphod 14. Jan 2007	Yes, that's how I made the keyfile I have - and I could make a lot of keyfiles that way. Random keyfiles among the infinite number there are. But I have probably just misunderstood what cyclops meant when he asked for a keyfilegen...:)
hound 14. Jan 2007	Its just a generator that generates a random keyfile for each user.
cyclops Moderator 15. Jan 2007	So u guyz are generating the second part first? Try this way, read a string frm user-first part of keyfile.......then generate second part of keyfile. For that u hav to reverse the algo.itz not a hash, itz a famous encoding.(4 byte to 3 byte..)
hound 15. Jan 2007	Hmm, thought of doing that but sounded like too much work ;). Also, wouldn't reversing the algo be going from 3 byte to 4 byte? Anyway, Im interesting in seeing other approaches and getting feedback once the solutions come up :D.
boof 15. Jan 2007	is the encoding base64?
cyclops Moderator 15. Jan 2007	Yeah....Base64....Well done.
HMX0101 15. Jan 2007	Easy... i didn't see it read two values from keyfile... that was my fault :) Anyway, nice one :)
boof 17. Jan 2007	hehe i'm so retarted :) finally got it figured out hehehe
kilobyte.asm 29. Jun 2009	hmm...i have the same problem as hound initially had, the comparison runs past the calculated bytes. Now reading his solution to that part, i still don't get it, i understand that it wraps round but...i guess i'm going to have to step through it more or ask some one for some direction.
kilobyte.asm 05. Jul 2009	right got it! hash has to be 1E length, so how do we get that? I'll leave you to figure that out ;P

cyclops's NTS-Crackme7

Download NTS-Crackme7.zip, 22 kb (password: crackmes.de)
Browse contents of NTS-Crackme7.zip

NTS(Newbie Cracking Series)-Crackme7

Regards,
Cyclo

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: C/C++

Published: 23. Dec, 2006
Downloads: 1617

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Solutions

Solution by wast, published 18. jan, 2007; download (120 kb), password: crackmes.de or browse.

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Discussion and comments

hound 10. Jan 2007	Wow that was really easy. Still I didn't rip any code in the keygen ;). Ill post my solution up later.
wast 17. Jan 2007	Yea. but was still fun ;p first keygen on 3-4 years or something huhu
Yogz 16. Feb 2007	I understand how the second part of the serial is achieved. What about the first part of the serial. When you enter sub_401260 there is a call to sub_401220 which creates the crc table. Then there is sub_4011F0 that creates the last 8 chars of the serial. But where does the first part of the serial get created since sub_4014D0 is the first time the name key gets read from the registry and then it is a call the sub_401260??????
Yogz 16. Feb 2007	To tired I should of seen the second call to sub_4011D0 that gets passed the second time, how sly checking the first part after the second part has been checked

cyclops's NTS-Crackme8

Download NTS-Crackme8.zip, 28 kb (password: crackmes.de)
Browse contents of NTS-Crackme8.zip

NTS(Newbie Cracking Series)-Crackme8

Regards,
Cyclo

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: C/C++

Published: 23. Dec, 2006
Downloads: 746

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Solutions

Solution by dreak, published 21. jan, 2007; download (38 kb), password: crackmes.de or browse.

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cyclops's NTS-Crackme9

Download NTS-Crackme9.zip, 23 kb (password: crackmes.de)
Browse contents of NTS-Crackme9.zip

NTS(Newbie Cracking Series)-Crackme9

Regards,
Cyclo

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: C/C++

Published: 23. Dec, 2006
Downloads: 807

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Solutions

Solution by hound, published 31. jan, 2007; download (15 kb), password: crackmes.de or browse.

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Solution by profdracula, published 04. jan, 2007; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

Zaphod 17. Jan 2007	profdracula states in his solution that a string is MD5'ed here: 00401E08 PUSH EDX ;--push string 00401E09 PUSH EAX ;--push length 00401E0A CALL Crackme9.00401CB0 ;--Get MD5 If you look at the crackme with PeID's plugin Krypto analyzer KANAL it says: MD5 :: 000013CE :: 004013CE I can't see that this address has anything to do with the call at 401E0A or any of it's subcalls. Given the address 4013CE, how can you figure out that the call to MD5 is at 401E0A?
wast 17. Jan 2007	by stepping throw code? have to some some work yourself.
Zaphod 17. Jan 2007	Oh yes, but what is the connection between these two adresses? It seems that the MD5-signature is placed far from the actual code, and that is what mystifies me. I simply like to understand things...

cyclops's OZiRiS

Download OZiRiS.zip, 86 kb (password: crackmes.de)
Browse contents of OZiRiS.zip

Crackme : OZiRiS
coder : Cyclops / REAL
level : 2
Prot : Custom Crypto
Solution: A working KeyGen + src + a nice tut!!!

Hi all.....

I am coding a crackme after some intervel.
This comprises a custom made crypto algo.
Itz not that grt but works fine.
Hope u enjoi it!!!

Gr33tz fly out to

str,xFactor,l0calh0st,K3V,mario,jB_,0x87k,HMX0101,x15or,lord_Phoenix,starzboy,THiN^SouRCE and all that i forgot....

(OZiRiS - Part of Project PolyPhemous)

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 27. Dec, 2006
Downloads: 846

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by WoCCC, published 18. jan, 2007; download (496 kb), password: crackmes.de or browse.

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Discussion and comments

cyclops Moderator 02. Jan 2007	May be some hint will help. "Itz a home made block cipher by me" Belated Happy new yr to all!!!(xamz on!!!)
kaiZer-by 02. Jan 2007	Cyclops, you are a good guy! In the readme-file you wrote 'level : 2', but here 3rd level-getHard! ;)
cyclops Moderator 02. Jan 2007	Hehe....may b itz little harder than i thought!!! Some krypto knowledge is prefferd!
jB_ 05. Jan 2007	I enjoyed it. Not hard, but it forces you to analyze the code... contrary to a lot of recent crypto keygenmes which contain only common algos and bring nothing new. Thanks cyclops :)
cyclops Moderator 06. Jan 2007	jB, man u are good. Sorry for the late reply, but i was in the middle of exmaz. jB_ solved it!!!
cyclops Moderator 23. Jan 2007	Good tut WoCCC.i never thought some one will brute force base64 routine...Though good job.

cyclops's SCORPiON

Download SCORPiON.zip, 105 kb (password: crackmes.de)
Browse contents of SCORPiON.zip

SCORPiON
--------

Hi,

this is my newest keygenme, the algo is in my head for almost a year, and now i got some time to implement and test it. And here it is!

Protection: Crypto/Math
Difficulty: U decide :P
GFX: (un)fortunatly be ME!

Rulz
----
. No Patching
. No direct serial brute-forcing

Solution == keygen + src + tut :)

Hint
----
. One name, many serials
. Some thing is changed to override KANAL

Greetz: To a lot of people :D

Regards,
Cyclo
www.cyclops.ueuo.com
-Mera Bharat Mahan

Difficulty: 5 - Professional problem to solve
Platform: Windows 2000/XP only
Language: C/C++

Published: 14. Oct, 2007
Downloads: 895

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Solutions

Solution by Numernia, published 26. sep, 2008; download (98 kb), password: crackmes.de or browse.

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Discussion and comments

sd333221 14. Oct 2007	I love UT-Font, i used it several time too.
cyclops Moderator 16. Oct 2007	Some of my frndz told me that cryptosig cant get the miracl functions used here, so i made the sig file for currently latest miracl version. Get it here http://cyclops.ueuo.com/tools.html Regards
HMX0101 16. Oct 2007	Mate, you're giving much help :) Recognizing miracl funcs are easy, if you know common funcs :)
cyclops Moderator 17. Oct 2007	Yep! Edit to the previous post: "Only for beginners of Miracl :P"
Ox87k 11. Jan 2008	Still unsolved?
andrewl.us Moderator 28. Sep 2008	"Zheng SignEncryption, Modified ICE-blockcipher, CRC32, SHA1" ... jeez, nice job :)
Numernia Moderator 28. Sep 2008	thank you andrewl =)

cyclops's Spear

Download spear.zip, 52 kb (password: crackmes.de)
Browse contents of spear.zip

A simple crackme.If u understand the algo itz a 2 min task

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 08. May, 2006
Downloads: 1319

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by sherwinjaye, published 23. apr, 2007; download (492 kb), password: crackmes.de or browse.

sherwinjaye has rated this crackme as quite nice.

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Discussion and comments

unicorn 11. May 2006	Nice checking function.Very eficcient i think.
indomit 15. May 2006	I still work on it.... but it... long %)
sub7 15. May 2006	Doesn't seem to break at a breakpoint. No confirmation of an invalid serial either...
Zaphod 21. May 2006	sub7: Try setting a breakpoint at 401610 - that is before IsDebuggerPresent...
GEEK 22. May 2006	401610 is the start of the routine
Zaphod 22. May 2006	GEEK: Yes, but it is not the entrypoint, and sub7 has probably tried setting breakpoints AFTER the debugger-check.
unicorn 02. Jun 2006	The crackme is interesting . i thinks its doing some calculation over the given serials and checking whether the output is CyClOpS. It seems very wierd.Algo is complex, But as cyclops said the reverse algo can be writen in 2 minutes.I think the difficulty should be 2. The serials are in this format xx=xx=xx=xx=xx=xx=xx Here xx is a hex value and = is a seperator as it was not used in any calculations.(may be like this xx-xx-......)
m@rio_crk 02. Jun 2006	It think this is quite easy, the values are constant in every 'loop' and you can make many different serials, for example: 00-00-00-00-00-00-00 00-00-00-00-00-00-00 00-00-00-00-00-00-00 00-00-00-00-00-00-00 43-79-43-6C-4F-70-53 ('CyClOpS') and I guess this 'mysterious' call (sub_4012B0) is for solving modular inversion ;) if the parametres were depending on the serial (not const) maybe this would be much more interesting crackme, anyway nice job cyclops!
cyclops Moderator 09. Jun 2006	Thanx mario.Ur always Good. The solution u given is correct but its a straight away. Make a keygen and submit a solution. The routine 412B0 is used for finding the modular inverse.
sherwinjaye 16. Apr 2007	Notice 00401A14 RDTSC, an anti-debug... :>

cyclops's Trinity

Download Trinity.zip, 55 kb (password: crackmes.de)
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Trinity

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 03. Mar, 2006
Downloads: 848

Rating

Votes: 4
Crackme is nothing special.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Download easy_math_keygenme.tgz, 175 kb

Discussion and comments

redoC 08. Feb 2013	I think crackme is full of bugs. SHA256 gives strange results. Even if I rearrange init constants I can't get same digest value. Converting to hex string uses sprintf("%X") instead of sprintf("%02X")... maybe intented? Base64 encoding/decoding also works very weird. I can solve this only by selfkeying.

cyrex's Easy Math Keygenme

crackme is packed , symbol table is missing , no anti debug
- make a keygen (mhh)
- find a valid name/serial pair (easy)
- No Patching.

have fun

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 19. Jan, 2006
Downloads: 671

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Solutions

Solution by stefanie, published 08. dec, 2006; download (40 kb), password: crackmes.de or browse.

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Solution by Kerberos, published 22. jan, 2006; download (41 kb), password: crackmes.de or browse.

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Discussion and comments

cyrex's Linux CrackMe

Download crackme_01.tgz, 5 kb

Find the correct password to get the good boy message :) it would be great for an solution how you solve this , and with what i solve this
with the standard GNU Debugger (gdb)

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 04. Mar, 2005
Downloads: 2415

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by mido_666, published 02. aug, 2005; download (876 b), password: crackmes.de or browse.

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Solution by _pNg, published 23. may, 2005; download (81 kb), password: crackmes.de or browse.

_pNg has rated this crackme as quite nice.

Solution by Oorja-HalT, published 07. mar, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by tiocsti, published 07. mar, 2005; download (2 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Silkut 03. Apr 2007	very simple, solution waiting for us.
lilith2k3 22. Feb 2009	oh my goodness. it is my first crackme and i solved it in less than 30s
civz 22. Feb 2012	my first crackme and a very easy one. definitely good for starters.
mztriz 31. Jul 2012	Very simple. Awesome.
vendramini 06. Feb 2013	No GDB needed on this one. Although it's nice to practice some reversing :) thanks!
reasdfasdf 22. Sep 2015	Using IDA almost feels like cheating for this one.
KingMak 02. Mar, 01:21	fun with gdb :) simple enough. Thanks

cyrex's Linux Crackme 02

Download crackme_02.tgz, 2 kb

It uses some protections may you can disable it
it has 2 stages one password and the other?
find out yourself :)

Good Luck

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 04. Mar, 2005
Downloads: 1611

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Oorja-HalT, published 07. mar, 2005; download (2 kb), password: crackmes.de or browse.

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Solution by tiocsti, published 07. mar, 2005; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

cyriel's cm01

Download cm01.zip, 6 kb (password: crackmes.de)
Browse contents of cm01.zip

My first cm... A bit original(I hope so). Na packers/protectors, 1 easy anti-debug protection.
rules:
-find password -> "Well done :)"
-no patching

Hope you enjoy :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 27. Oct, 2008
Downloads: 268

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Solutions

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Send a message to cytom!c »

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Discussion and comments

rdk3020
28. Oct 2008

Hi cyriel, I find interesting your keyfindme.
But I believe your program has an design mistake at the very end:

00BE13BA . 6A 00 PUSH 0 ; /pBytesWritten = NULL
00BE13BC . 6A 04 PUSH 4 ; |BytesToWrite = 4
00BE13BE . 8D4424 14 LEA EAX,DWORD PTR SS:[ESP+14] ; |
00BE13C2 . 50 PUSH EAX ; |Buffer
00BE13C3 . 68 D4134000 PUSH 4013D4 ; |Address = 4013D4
00BE13C8 . 51 PUSH ECX ; |hProcess => FFFFFFFF
00BE13C9 . 885424 23 MOV BYTE PTR SS:[ESP+23],DL ; |
00BE13CD . FF15 1830BE00 CALL DWORD PTR DS:[<&KERNEL32.WriteProcessMemory>] ; \WriteProcessMemory
00BE13D3 > 68 00007E00 PUSH 7E0000
00BE13D8 . FFD5 CALL EBP

When @ 00BE13C3 you PUSH 4013D4 (The destination address) to WriteProcessMemory. You are pushing a CONSTANT ADDRESS (an address valid only at a particular run time) not an OFFSET.

And that CONSTANT is supposed to modify PUSH 7E0000 @ 00BE13D3. To correctly push the address of the "Well done :)" string for the CALL EBP (printf) @ 00BE13D8.

But hey I am a newb so please tell me if my statements are not correct.

cytom!c's crackme #1

Download ctm_cm1.zip, 109 kb (password: crackmes.de)
Browse contents of ctm_cm1.zip

name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 20. May, 2000
Downloads: 2922

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Solutions

Solution by *Sorcerer*, published 30. jul, 2002; download (50 kb), password: crackmes.de or browse.

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Solutions

Solution by cronos, published 24. apr, 2000; download (22 kb), password: crackmes.de or browse.

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Discussion and comments

D0min4ted's KeygenMe by D0min4ted

Download crackme.zip, 6 kb (password: crackmes.de)
Browse contents of crackme.zip

my first keygenme
rules:
no bruteforce
no patch
no reflector
no selfkeygen

have fun
-D0min4ted

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 16. May, 2010
Downloads: 775

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by deurus, published 03. jul, 2010; download (121 kb), password: crackmes.de or browse.

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Send a message to D1m0n »

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Discussion and comments

deurus 30. Jun 2010	There is a exception with some chars in the algoritm. The chars which have a letter in ascii code (in hex) invoke a exception. example: o (6F), m (6D)
jvwarrior 03. Aug 2010	lol this seems noob and I know its an old crackme but how do you crack a .NET i without reflector? Olly?
fedor2612 13. May 2015	+jvwarrior Dotpeek=)

D1m0n's D1m0n's CrackMe1

Download D1m0n__s_CrackMe1.zip, 11 kb (password: crackmes.de)
Browse contents of D1m0n__s_CrackMe1.zip

If you can please make video.
No packer!!!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 05. Aug, 2008
Downloads: 231

Rating

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Discussion and comments

br0ken 06. Aug 2008	I get this error on running your cme. This application has failed to start because vcl100.bpl was not found. Re-installing the application may fix this problem.
xylitol 06. Aug 2008	same error for me
D1m0n Author 06. Aug 2008	Download this file http://ifolder.ru/7607726 to C:\Windows\System32
D1m0n Author 06. Aug 2008	or http://depositfiles.com/files/7030835
D1m0n Author 06. Aug 2008	If to you it is necessary - rtl100.bpl http://depositfiles.com/files/7031002
D1m0n Author 06. Aug 2008	CC3280MT.DLL http://depositfiles.com/files/7039958
br0ken 06. Aug 2008	It also asked me for borlndmm.dll Anyway, i've put in all the files necessary for it to run in here. http://rapidshare.com/files/135357218/StuffRequired.rar Put all the files inside the archive in the same directory as the cme and it will run fine.
huds0n_s 07. Aug 2008	Hi, New to all this here :) Great site! What result are we looking for? When I ran the program, i just typed (almost) random numbers into the box and then I could click the button. It then says "Your Registered"? Is that a mistake?
br0ken 07. Aug 2008	Yep, it happened to me too :P Nah, not a mistake. You got lucky ;)
D1m0n Author 06. Sep 2008	http://www.dll.ru/dll/56.html

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d3ux's Keygenme1

Download Keygenme#1.zip, 3 kb (password: crackmes.de)
Browse contents of Keygenme#1.zip

Code a keygen for it, don\'t copy my code in crackme into your keygen.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 05. Oct, 2004
Downloads: 1291

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Solutions

Solution by Plasmator, published 06. oct, 2004; download (10 kb), password: crackmes.de or browse.

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Solution by kao, published 06. oct, 2004; download (21 kb), password: crackmes.de or browse.

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d3ux's MSNCrackme

Download MSNCrackme.zip, 287 kb (password: crackmes.de)
Browse contents of MSNCrackme.zip

There will be a valid serial waiting for you guys to find out :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 11. May, 2009
Downloads: 860

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D4ph1's D4ph1-Crackme#1

Download D4ph1_-_Crackme#1.zip, 3 kb (password: crackmes.de)
Browse contents of D4ph1_-_Crackme#1.zip

- Type : Name/Serial and some easy crypto stuff
- Difficulty : 1/10 [For newbies]
- Rules : Patching or Touching any byte of the program is not allowed and will be punished by The Law! :p
- Target : Make a keygenerator and find the secret message hiding inside the crackme.
- Not packed or protected by any program.

Tip : You have to "travel" inside the crackme... ;)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 23. Nov, 2005
Downloads: 1350

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by konstAnt, published 28. nov, 2005; download (8 kb), password: crackmes.de or browse.

konstAnt has rated this crackme as boring crap.

Solution by Tenshi, published 28. nov, 2005; download (22 kb), password: crackmes.de or browse.

Tenshi has rated this crackme as quite nice.

Discussion and comments

Scortile 23. Nov 2005	nice crackme :) Though that secret message was kinda stupid.. from the beginning I was wondering what it would be, and when I saw it, I was like "oh.. is this it?" :p Anyway, continue this way :) like these special kind of crackmes; even though the protection was real standard.
D4ph1 Author 23. Nov 2005	Yeah it's for really newbies... The next one will be harder i promise...and less stupid :)
Tenshi 24. Nov 2005	IAM A NEWBIE i have the serial for my name but i dont reach the "you have passed all test..." MOV EBX,47 /MOVSX EDI,BYTE PTR DS:[EDX+4033CC] ; is R = 52 \|MOVSX ESI,BYTE PTR DS:[EDX+40333B]; is 0 \|ADD EBX,ESI ;47 + 0 = 47 \|CMP EDI,EBX 52 == 47 ? \|JNZ SHORT D4ph1_-_.004011EB ; JMPS \|INC EDX \|CMP EDX,5 \JBE SHORT D4ph1_-_.004011A9 dont understand that please help :-/
D4ph1 Author 24. Nov 2005	"Tip : You have to "travel" inside the crackme... ;)" -> I think the data section can help you ;)
Tenshi 24. Nov 2005	LoL nice message or better who knows the answer ? good crackme to learn ^^ Thx
BootLoader 25. Nov 2005	i get some encrypted words inside. :) 3Eowkx7~}\|sp}srnoox*oa
Ox87k 25. Nov 2005	yeah! Very go0d riddle/crackme :D i solve it in 5 min with a little bruteforce... :P
D4ph1 Author 25. Nov 2005	Well...Thanks for trying this...Im waiting for solutions....:) Ox87k 5 min is too much :P PS : Im coding next one
Tenshi 25. Nov 2005	solution is coming....i also have written an fischer for your crackme if u want it tell me ^^
Ox87k 25. Nov 2005	D4ph1 ;) i think that the moderators don't accept more than 2/3 solution for this crackme because it's so easy but tomorrow i try to send my solution... however, thanks for this crackme, i'm waiting for the next ;)
D4ph1 Author 28. Nov 2005	@Tenshi send me your fisher if you can please...Im curious ;)

D4ph1's D4ph1-Crackme#2

Download D4ph1_-_Crackme#2.zip, 3 kb (password: crackmes.de)
Browse contents of D4ph1_-_Crackme#2.zip

- Author : D4ph1

- File : D4ph1 - Crackme#2.exe

- Programming Language : Assembler

- Compiler : MASM32

- OS : Windows

- Type : Name/Serial

- Difficulty : 1/10 [For Newbies]

- Protection : Not packed or protected by any program

- Target : Make a keygenerator.

- Rules : Patching is not allowed. You must understand the main idea of the algorithm, DON'T JUST RIP THE CODE!

- Tip : The Serial is generated using a key which produced by a mathematic quiz that some friends forced me to solve :)

- Greets : Mitsos for learning me the quiz, crackmes.de and everyone out there I know or know me!

-ENJOY-

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 09. Dec, 2005
Downloads: 1118

Rating

Votes: 7
Crackme is boring.

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Solutions

Solution by Seco_1, published 06. jan, 2006; download (6 kb), password: crackmes.de or browse.

Seco_1 has rated this crackme as quite nice.

Solution by Tenshi, published 22. dec, 2005; download (26 kb), password: crackmes.de or browse.

Tenshi has rated this crackme as quite nice.

Discussion and comments

D4ph1 Author 10. Dec 2005	Anyone tried this?
Tenshi 12. Dec 2005	iam going to do it ;-)
Tenshi 13. Dec 2005	i have my key ^^, going to analyse ur routine.....
Tenshi 13. Dec 2005	ok its an big routine....iam on the keygen..... nice crackem ^^ good for noobs like me ;-)
D4ph1 Author 13. Dec 2005	I hope you really find out whats going on in the routine ;) Anyone else?
D4ph1 Author 16. Dec 2005	I received the second message saying that the key is produced by adding a 01h between each hex value...This is not correct... Come on its not that hard!;)
jB_ 16. Dec 2005	"Tip : The Serial is generated using a key which produced by a mathematic quiz that some friends forced me to solve :)" Looks like this: http://dheera.net/sci/sequence.php ? :) Your routine is well thought, for beginners as you said. The keygen is really worth to be coded for all beginners. Congrats.
D4ph1 Author 17. Dec 2005	Yeah thats the quiz! I didn't know this site! Thought I don't know if you should have posted the solution...;)
jB_ 18. Dec 2005	I put a keygen on my website two days ago, maybe it can interest one of you. ( http://jardinezchezjb.free.fr )
D4ph1 Author 18. Dec 2005	HMX0101 I don't know how your comment removed...:/ I didn't remove it
zairon Moderator 18. Dec 2005	I removed the comment. Directly from our faq: "You can also use the 'Discussion and comments' section available for every crackme; please, don't post comments like "I have solved the crackme" or "Solved! Serial is xxx"
San_SS! 29. Jan 2006	hey D4ph1! good crackme for begginers like me, eventhough the routine was a little longer than what i expected this was my first crackme...can ya tell me if i can improve some stuff San_SS!

D4ph1's Epicurus

Download D4ph1_-_Epicurus.zip, 21 kb (password: crackmes.de)
Browse contents of D4ph1_-_Epicurus.zip

- Author : D4ph1
- Archive : D4ph1 - Epicurus.exe , Readme.txt
- Compiler : MASM32
- OS : Windows [Tested on XP SP1 & SP2 but should work on others fine]
- Type : Name/Serial/etc ;)
- Difficulty : 3/10 (If im not right correct me)
- Protection : None
- Targets : 1. Make a Keygenerator
2. Find the hidden apopthegm
3. Write a tutorial
- Rules : Patching and selfkeygens are not considered as solutions for any of the targets! Only keygens are accepted. This program uses simple geometry and math stuff. So try to understand the idea of how the serial is generated and explain in your tut this idea.
- Tip : An idea for a keygenerator is this : In your keygenerator the user must enter not only his "Name"... Or do whatever you like using your fantasy ;)
- Contact : fistiks16@hotmail.com

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 12. Oct, 2006
Downloads: 521

Rating

Votes: 3
Crackme is boring.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

geeko 13. Oct 2006	whats 'apopthegm' ?!?!
D4ph1 Author 13. Oct 2006	Something that someone told once upon a time... It can be translated as "phrase" also... :)
Kostya 13. Oct 2006	"Nothing isn`t created by nothing.Epicurus,341-270 BCE" it's an apopthegm?! Or what!?
Kostya 13. Oct 2006	R-r-r... Just now thinkin' how to write a keygen :) maybe to set a hook..
D4ph1 Author 15. Oct 2006	@Kostya : Yes thats the hidden apopthegm! If you understand how this is decrypted you can make the keygen in some minutes...It might looks more complicated not only because its in asm but maybe because of my programming skills too :)
konstAnt 15. Oct 2006	Plz view the discussion http://community.reverse-engineering.net/viewtopic.php?p=37825#37825 I need some help...
Kostya 15. Oct 2006	Should the right apopthegm be displayed with "You'r the best message", or we can enter serials that will display only GoodBoy msg, but not right apopthegm!
D4ph1 Author 15. Oct 2006	A bug has just found but shouldnt be much of problem... I will fix that. A perfect solution would be to make a valid serial and decrypting the apopthegm as long as all possible serials that decrypt the apopthegm can be found. Find just valid serials would also be a solution...Depends on your egoism :)
Gauri 15. Oct 2006	Is the jump the bug????????? as discussed in the forum..
Gauri 15. Oct 2006	Is the jnz the bug????????? as discussed in the forum..
Kostya 15. Oct 2006	No! It's not a bug! it's just a check as i said! it checks if u clicked the icon!
Gauri 15. Oct 2006	Ok I found my answer...
D4ph1 Author 18. Oct 2006	You gave up? Is this my first crackme i wont have a solution? Anyone close to a keygen? Come on :(
Kostya 18. Oct 2006	Maybe i'll write a keygen... But i have no free time...
DaBookshah 25. Oct 2006	I'll probably put one together. On an unrelated note - The password depends on where you click on the picture(I think)? WTF?!?
D4ph1 Author 25. Oct 2006	DaBookshah : Yes one part of the Serial depends on where you click the icon and more specific, it depends on the coordinates... Some calculations with the coordinates makes the "geometry" stuff... Another part depends on the Name... Hope I help :)

D4ph1's Self Destructed

Download D4ph1_-_Crackme#3.zip, 4 kb (password: crackmes.de)
Browse contents of D4ph1_-_Crackme#3.zip

- Author : D4ph1
- File : Crackme#3 - Self Destructed.exe
- Programming Language : Assembler
- Compiler : MASM32
- OS : Windows
- Type : Name/Serial
- Difficulty : 1/10
- Protection : Very very simple but if you dont bypass it...check what happens!:)
- Target : Make a Keygenerator. Selfkeygens are also accepted but the keygen has the priority
- Rules : No rules, but becarefull if you patch anything!
- Blahblah : The Serial is different on each machine
- Greets : Rascob,Linden,ultrasound,Giavanna,everyone in crackmes.de and everyone who FIGHTS!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 01. Feb, 2006
Downloads: 1737

Rating

Votes: 9
Crackme is nothing special.

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Solutions

Solution by l0calh0st, published 11. feb, 2006; download (180 kb), password: crackmes.de or browse.

l0calh0st has rated this crackme as quite nice.

Solution by paranoid, published 11. feb, 2006; download (5 kb), password: crackmes.de or browse.

paranoid has not rated this crackme yet.

Solution by Kerberos, published 02. feb, 2006; download (59 kb), password: crackmes.de or browse.

Kerberos has rated this crackme as boring.

Solution by Ank83, published 02. feb, 2006; download (5 kb), password: crackmes.de or browse.

Ank83 has rated this crackme as quite nice.

Send a message to d4rK_r3v3rs3R »

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Discussion and comments

D4ph1 Author 02. Feb 2006	Anyone tough with a keygenerator?
Ox87k 02. Feb 2006	hmm.. i'm trying to make a kEYGEN but i don't understand how to the first dword of own id is generated.. I can try in only 1 pc so :( The first 4 bytes is unknow for me, the 5 and 6 byte is the result of GetVersion, part less significative and the other is the result of GetComputerName. An help plz?? :) TnX!
D4ph1 Author 02. Feb 2006	Ox87k : Icant really understand that dword you say:/ Except if you mean the Kernel32 address =)
Ox87k 03. Feb 2006	hum... murble! maybe i understand! =) however i'm waiting another solution+keygen source! great j0b D4ph1!
Ank83 04. Feb 2006	Your keygen is not right on my machine also.
paranoid 04. Feb 2006	I need to figure out how to recode stuff, self keygenning and putting the keygen into a messagebox is a bit dirty... but oh well! Thanks for this one.
D4ph1 Author 05. Feb 2006	Thanks for your good words...Too shame the submission is closed! I'd like to see a keygenerator :(
paranoid 05. Feb 2006	I made a self keygen :P I dunno, I should read up more on ASM... maybe next time! ;)
Ox87k 05. Feb 2006	d4ph1, since the submission of solutions is closed, can u upload in some space (like rapidshare or another) the source of this crackme or at least first part? Thanks... I would want to try to understand as you have made!
zairon Moderator 05. Feb 2006	ok, submission is now open.
D4ph1 Author 06. Feb 2006	Thanks moderators! paranoid : You can send me your self-keygen if you want by mail :) Ox87k : As soon as a working keygen approved or the submission is closed i will upload the source.Because I know where you get confused, I can give you a hint : See what the crackme does when its loaded before calling the DialogBox procedure. Hope I help! :)
Ox87k 06. Feb 2006	it seems that work on the call to isdebuggerpresent... decrypt name and get, i think, the its address... but I continue to not understand!!! L0L!
D4ph1 Author 07. Feb 2006	Ox87k : Ok maybe I have to tell more...lol! Analyse the very first call that the crackme does...before decrypting the isdebuggerpresent. Then some checks are made uppon this dword value that the call returns (and i as I told you its the address of Kernel32) and finally this value is changing to something similar. Wow I can keep no secrets!:)
l0calh0st 09. Feb 2006	Have the hidedebuggger plugin for olly....so it was eas to get the serial and make a self kegen...thanks to ank83 and Ox87k ;)..and to D4ph1 for making this keygen :)
D4ph1 Author 09. Feb 2006	l0calh0st I hope you havent sent a self-keygen...There are already two.I know its very easy to self-keygen it thats why im asking for a keygenerator plz! Thanks! :)
Ox87k 09. Feb 2006	d4ph1 i have make a keygen in asm but rip the code so is not g00d to send.. i don't really understand how to make the first part in c/c++ - u made a g00d j0b, damned!!
l0calh0st 09. Feb 2006	oops i just sent it......sorry it's my very first crackme....so i was excited...Actually i just registered yesterday...so hoping to gain some knowledge here Thanks;)
D4ph1 Author 09. Feb 2006	Ox87k send it if it works...I dont care if you rip the code as long as it works...Send it and i'll give you the source!=)
Ox87k 09. Feb 2006	i need another little help!! in this line 00401461 \|. 8B9F 07124000 \|MOV EBX,DWORD PTR DS:[EDI+401207] the crackme load in ebx some values... but... is this a "table" with some value or ....(boh!).... ????
D4ph1 Author 10. Feb 2006	At 401207 there are some anti-debug opcodes (bytes) of the crackme. esi = Size of the ComputerName, so the max number of bytes you will take from the crackme from 401207 is MAX_COMPUTERNAME_LENGTHdword=324=128.
Ox87k 11. Feb 2006	my keygen not work.. =( the first part is ok but the second... damned!!!
acidflash 13. Feb 2006	I hope to keygen this baby :) Internal w/ good serial injected into textbox is really cheating but best I can do for now :)
acidflash 17. Feb 2006	D4ph1: Re: crackme#3 Â« Back to messages Sent: 16. Feb, 16:41 It works just fine!Congratulations!!!! Only the Name tha should be at least 5 chars not 6...but thats ok!!! Congrats again!!!!;) hehe fixed that, email me if anyone wants solution. This place seems to hate
D4ph1 Author 17. Feb 2006	Anyone who's interested in, here is the link to download the source of my crackme : http://rapidshare.de/files/13468636/D4ph1_-_Crackme_3_Source_.rar.html
zairon Moderator 17. Feb 2006	acidflash, we don't hate anyone but if you submit this tutorial: ---------------------------------------------- nuke debugger check: 00401287 EB 2C JMP SHORT injected.004012B5 hook: 004014BE > E8 FD000000 CALL Internal.004015C0 004014C3 . EB 21 JMP SHORT Internal.004014E6 cave: 004015C0 /$ 68 70334000 PUSH Internal.00403370 ; /lParam = 403370 004015C5 \|. 6A 00 PUSH 0 ; \|wParam = 0 004015C7 \|. 6A 0C PUSH 0C ; \|Message = WM_SETTEXT 004015C9 \|. 68 EB030000 PUSH 3EB ; \|ControlID = 3EB (1003.) 004015CE \|. FF75 08 PUSH DWORD PTR SS:[EBP+8] ; \|hWnd 004015D1 \|. E8 82FFFFFF CALL <JMP.&user32.SendDlgItemMessageA> ; \SendDlgItemMessageA 004015D6 \. C3 RETN ---------------------------------------------- we must have to reject the solution, don't you think?
acidflash 17. Feb 2006	hehe yea :) I would have rejected that also... I hadn't actually looked at the format the others use to submit solutions (my bad).. Writing up a tutorial for the keygen now, will submit asap. Thanks for re-opening :)
DJ1hAD0 22. Jun 2013	This crackme not works on my PC (W7SP1)
arlkers 19. Apr 2014	Thanks,everyone!

d4rK_r3v3rs3R's TheMSG

Download TheMSG.zip, 5 kb (password: crackmes.de)
Browse contents of TheMSG.zip

Objectives:
1. Enable the Verify button (Patching Allowed)
2. Get the secret message and virify if it's correct (Patching not Allowed)

Difficulty: 1 - Very easy, for newbies
Platform: Multiplatform
Language: Unspecified/other

Published: 12. Jan, 2015
Downloads: 235

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by draww, published 25. jan, 2015; download (6 kb), password: crackmes.de or browse.

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Solution by Delirium, published 25. jan, 2015; download (607 b), password: crackmes.de or browse.

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Solution by Himsord, published 25. jan, 2015; download (989 b), password: crackmes.de or browse.

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Discussion and comments

draww 19. Jan 2015	my answer to your secret message: you too bro :)

Daemon's Daemon's crackme 1

Download DCrackme_1.zip, 17 kb (password: crackmes.de)
Browse contents of DCrackme_1.zip

RULES:
Yor Aim is to brute or find right serial.
Making of keygen not neccesary, but it will be a plus
algorithm is very simple, it takes about 15 min from you
If you can solve this puzzle, you will see a final crypted string
Each mistake will call exit to OS without any message
I'll Hope, you dont waste you time, and learn something new \n");
and interesting about selfmodidication technique
Final string consist from 1 word. You can try to decrypt it, but is it possibe, who knows

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 20. Jun, 2006
Downloads: 497

Rating

Votes: 3
Crackme is quite nice.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to Damo2k »

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Discussion and comments

Daemon Author 22. Jun 2006	Come on people, you dont need write a keygenme. Brute crack or 1 right serial is allowed...
Daemon Author 30. Jun 2006	Hmmm, there are no solutions :( If this crackme remain unsolved, it will be a good reason to use this technique in important products.

Solution by DJ1hAD0, published 19. jan, 2016; download (138 kb), password: crackmes.de or browse.

DJ1hAD0 has rated this crackme as awesome.

Solution by batman10, published 19. jan, 2016; download (1 kb), password: crackmes.de or browse.

batman10 has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

DJ1hAD0 13. Dec 2015	It was funny:D Thank you:)
Yield 14. Dec 2015	very nice exercice, cant upload a solution, wonder why...
Dr. Cat 16. Dec 2015	Just put a BP on: 00401455 \|. E8 766B0000 \|CALL <JMP.&msvcrt.strcmp> ; \|\strcmp Enter a fake password, olly will break and you will see a string comparison in the memorystack. It will compare fake pass to the correct pass.
sadfud 18. Dec 2015	solution in spanish here https://reversecodes.wordpress.com/2015/12/18/a-crackme-c-facil/
GyroJosh 22. Dec 2015	Thank you for this, enjoyable.
LangTuu 25. Dec 2015	Nice, I'm a beginer so, when I enter wrong pass and then this address say 00401443 \|. 8D8424 8300000>\|LEA EAX,DWORD PTR SS:[ESP+83] ; \|\| Stack address=0061FF23, (ASCII "BombaDG ") EAX=0061FEBF, (ASCII "123456789 ") I try BombaDG :) LOL It's so funny,
Mizre 10. Jan, 12:18	It's quite simple indeed. replace JE SHORT 0040147E to JMP SHORT 0040147F at this address 0040145C /74 20 JE SHORT a.0040147E
Nummer 15. Jan, 20:28	THANK! VERY EASY
b3nc0 18. Jan, 13:23	replace: 0040145C\| JZ SHORT 0040147E by 0040145C\| JMP SHORT 0040147E
crackme101 30. Jan, 05:55	Very newbie friendly indeed. I agree with the others. Just do a BPX on strcmp. Bamn, you got your password now!
AwesomeKid 15. Feb, 17:07	Replace the JE to a JNZ and it will accept anything. Pretty nice.
gemrite 18. Feb, 17:26	Thank you ! Keep the simple ones coming !!!
kyronos 26. Jun, 04:10	Thanks, password is BombaDG

Damo2k's Damo's crackme #1 for linux

Download crkme1-linux32.gz, 5 kb

CrackME 1.0 - Damo for linux
Coded in C.

Executables for Win32, Linux, Solaris are using the same code.

The idea is to find a valid serial.
Run from command line and pass in a serial as an argument.

No Patching!!!
Executable is not packed or encrypted.

This is my first crackme, so go easy on me!

p.s. a keygen would be nice :-)

damohere@gmail.com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 14. Jan, 2008
Downloads: 660

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Yoha, published 14. feb, 2013; download (7 kb), password: crackmes.de or browse.

Yoha has not rated this crackme yet.

Solution by cert, published 22. mar, 2009; download (1 kb), password: crackmes.de or browse.

cert has not rated this crackme yet.

Solution by pof_es, published 16. jan, 2008; download (10 kb), password: crackmes.de or browse.

pof_es has rated this crackme as quite nice.

Solution by bundy, published 16. jan, 2008; download (8 kb), password: crackmes.de or browse.

bundy has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

pof_es 12. Jan 2008	this is x86-64, can you post a 32bit version?
Damo2k Author 13. Jan 2008	oh sorry, i'll up it as soon as i get a chance to compile it on a 32bit machine.
Damo2k Author 14. Jan 2008	32bit version here now.
lagalopex 14. Jan 2008	gcc -m32 will work most often ;)
Damo2k Author 14. Jan 2008	thx. I wasn't aware of that.
pof_es 15. Jan 2008	Finally solved it, you got me all night awake :)
zbychu 20. Jul 2015	My first crackme, nice :-)

Damo2k's Damo's crackme #1 for Solaris

Download crkme1-solaris.tar.gz, 3 kb

CrackME 1.0 - Damo for Solaris
Coded in C.

Executables for Win32, Linux, Solaris are using the same code.

The idea is to find a valid serial.
Run from command line and pass in a serial as an argument.

No Patching!!!
Executable is not packed or encrypted.

This is my first crackme, so go easy on me!

p.s. a keygen would be nice :-)

damohere@gmail.com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 12. Jan, 2008
Downloads: 267

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

costy 04. Jul 2008	Executables for Win32?? How can i run this under Windows?
Ox87k 04. Jul 2008	This version is for Solaris, look Damo2k's profile to see the other versions (linux and win32). Here: http://www.crackmes.de/users/damo2k

Damo2k's Damo's crackme #1 for Win32

Download crkme1-win32.zip, 12 kb (password: crackmes.de)
Browse contents of crkme1-win32.zip

CrackME 1.0 - Damo for Win32
Coded in C.

Executables for Win32, Linux, Solaris are using the same code.

The idea is to find a valid serial.
Run from command line and pass in a serial as an argument.

No Patching!!!
Executable is not packed or encrypted.

This is my first crackme, so go easy on me!

p.s. a keygen would be nice :-)

damohere@gmail.com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 12. Jan, 2008
Downloads: 588

Rating

Votes: 5
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by malfunction, published 16. jan, 2008; download (95 kb), password: crackmes.de or browse.

malfunction has not rated this crackme yet.

Solution by Computer_Angel, published 16. jan, 2008; download (10 kb), password: crackmes.de or browse.

Computer_Angel has not rated this crackme yet.

Solution by ARCHANGEL, published 16. jan, 2008; download (2 kb), password: crackmes.de or browse.

ARCHANGEL has rated this crackme as nothing special.

Solution by profdracula, published 16. jan, 2008; download (18 kb), password: crackmes.de or browse.

profdracula has rated this crackme as nothing special.

Send a message to daniel-rj »

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Discussion and comments

profdracula 12. Jan 2008	Good crackme for newbees (Though its stated to be like a serial-fishme but it is fully keygennable). Solution submitted.
ARCHANGEL 12. Jan 2008	Not bad, but Difficulty-2 is to much for this crackme
Computer_Angel 13. Jan 2008	nice keygenme, Solution submitted
fromTurkey 16. Jan 2008	nice code i examined the code and will crack it after my operation system exam tomorrow..... :)
Muns 27. Mar 2008	Thanks, easy one to give my confidence a boost :), but yeh as ARCHANGEL said this should be Difficulty-1.
TheTyphoon 22. Sep 2012	Solved, thanks ! Serial: ?P.H??BBBB Pretty easy tough!

daniel-rj's crackme1

Download daniel_rj.zip, 115 kb (password: crackmes.de)
Browse contents of daniel_rj.zip

disabled functions

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 23. Apr, 2000
Downloads: 2708

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by bRaiN_faKKer, published 06. oct, 2002; download (1 kb), password: crackmes.de or browse.

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Solution by eternal bliss, published 23. apr, 2000; download (3 kb), password: crackmes.de or browse.

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Solution by dark wolf, published 23. apr, 2000; download (1 kb), password: crackmes.de or browse.

dark wolf has not rated this crackme yet.

Solution by muad'dib, published 23. apr, 2000; download (3 kb), password: crackmes.de or browse.

muad'dib has not rated this crackme yet.

Solution by code_inside, published 23. apr, 2000; download (3 kb), password: crackmes.de or browse.

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Send a message to dapope »

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Discussion and comments

dapope's java crackme #1

Download dapope_java1.zip, 17 kb (password: crackmes.de)
Browse contents of dapope_java1.zip

name/serial (java)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 06. Jun, 2000
Downloads: 1927

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by mist, published 06. jun, 2000; download (1 kb), password: crackmes.de or browse.

mist has not rated this crackme yet.

Solution by EOD, published 06. jun, 2000; download (95 kb), password: crackmes.de or browse.

EOD has not rated this crackme yet.

Solution by the_dux, published 06. jun, 2000; download (5 kb), password: crackmes.de or browse.

the_dux has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

dapope's java crackme #2

Download dapope_java2.zip, 79 kb (password: crackmes.de)
Browse contents of dapope_java2.zip

nag (java)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 25. Oct, 2000
Downloads: 1856

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by ^heiko, published 25. oct, 2000; download (2 kb), password: crackmes.de or browse.

^heiko has not rated this crackme yet.

Solution by latigo, published 25. oct, 2000; download (90 kb), password: crackmes.de or browse.

latigo has not rated this crackme yet.

Solution by the_dux, published 25. oct, 2000; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

DarioX's CrackMe1.5

Download CrackMe1.5.zip, 11 kb (password: crackmes.de)
Browse contents of CrackMe1.5.zip

Easy CrackMe for newbies. No encryption and structured easily for a fast comprehension of the used algos.
Rules:
For big newbies - Patching allowed (a joke).
For small newbies - Find a valid serial and write a Keygen.
Please rate it yourself.
Have fun ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 02. Dec, 2007
Downloads: 580

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by synak, published 11. dec, 2007; download (7 kb), password: crackmes.de or browse.

synak has rated this crackme as quite nice.

Send a message to Darius949 »

View profile of Darius949 »

Discussion and comments

Williamz 05. Dec 2007	I can bypass it, to say "Be happy..." But I have yet to be able to find a valid serial, gay :/.
DarioX Author 05. Dec 2007	You have patched it, but the real challange is to find a valid serial. Try harder you can do it ;)
baudstupid 05. Dec 2007	@Williamz... How did you patch it? I mean what disassembler (or other tool) did you use? I'm having issues with certain tools since I downgraded from XP to Vista 8-)
DarioX Author 08. Dec 2007	Still no solution? :( Maybe it's too hard for lvl 2...
codek 08. Dec 2007	I found my valid serial, but i don't know write Keygen ;(
synak 09. Dec 2007	found valid serial....and understand initial hash of name, but unable to follow the selection of chars from hardcoded hash
DarioX Author 12. Dec 2007	Well done synak ;) PS: The references to "MD5" aren't a "mistake", I wanted to make it easier. - cit. "fast comprehension of the used algos"
KoЯn Rulz 18. Dec 2007	it was easy to patch but i am still trying to find a good code
KoЯn Rulz 18. Dec 2007	ps. i am not a noobie i have cracked visual basic programs using patching REAL PROGRAMS.

Darius949's crackme1

Download crackme1.tgz, 7 kb

Just run it in the terminal ./crackme1
will ask for a user name and serial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 25. Jan, 2016
Downloads: 236

Rating

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Solutions

Solution by rsumi, published 09. feb, 2016; download (603 b), password: crackmes.de or browse.

rsumi has rated this crackme as nothing special.

Solution by acruel, published 09. feb, 2016; download (984 b), password: crackmes.de or browse.

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Discussion and comments

rsumi 26. Jan, 18:26	How can I unpack it? tar zxvf ~/Downloads/crackme1.tgz gzip: stdin: not in gzip format tar: Child returned status 1
S!x0r 26. Jan, 21:23	Hi rsumi, remove the extensions ".tgz" or run it by ./crackme1.tgz. It's the elf file, not an archive!
acruel 26. Jan, 23:33	Level 2? Anyway, I submitted a solution. :)
apuromafo 27. Jan, 18:46	Detected compiler/packer: gcc (i686-linux-gcc) (4.5) french string to correct places: return puts("Vous avez craque le no de serie"); br, Apuromafo

darkelf's Darkelf KeygenMe #2

Download Darkelf_KeygenMe2.zip, 133 kb (password: crackmes.de)
Browse contents of Darkelf_KeygenMe2.zip

Hey folks,

this is my second KeygenMe

Do yourself a favor and make notes of every step you take while analyzing this baby. You'll be lost in notime if you don't.

There is only one rule:

No patching! It's a KeygenMe after all ;-)

If you were able to solve it, please write a tutorial for others to benefit from your success.

This KeygenMe is written in PureBasic.
Don't let the word "Basic" fool you - you won't be faced with a crappy runtime. Actually, I stopped (not completely) coding in C/C++ after more than 15 years in favour of PureBasic. The language is just awesome.

[modnote]
this only works on 32 bit versions of windows, see comments
[/modnote]

Have fun
yours Darkelf

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 06. Sep, 2012
Downloads: 593

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to Darkmaster2 »

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Discussion and comments

mausy131 06. Aug 2012	Couldn't read value.. Exiting now! Some kind of nag??
darkelf Author 06. Aug 2012	@mausy131 If you are actually facing this message, you must either have absolutely no rights on your computer or you are using a weird version of Windows. Weird means in this case damn old or too new (because I didn't have Win8 to check if the KeygenMe is running there without fault).
sasue11 06. Aug 2012	lol I have Windows 7.And I have UAC disabled.Couldn't read value.What should I do?
darkelf Author 07. Aug 2012	@sasue11 Well, actually this should be impossible! Even if I spoil something now: the KeygenMe reads out some registry value. If you don't have this value, your Windows doesn't have a serial number.
ceycey 07. Aug 2012	I have the same problem as mausy131 and I know I have a valid windows serial number but you may know that windows 7 encrypts the serial number and you are trying to pull it with RegQueryValueExA API directly. I have not gone through to see whether you use the decryption algo or that's your goal to use the encrytped data but I think that may be the problem. I am not sure
darkelf Author 07. Aug 2012	@ceycey No, there must be some other reason. I tested it really excessively. The problem is not an encrypted serial but the lack of this certain registry value. This KeygenMe is also availabe over there at Woodmann's and was announced at Exetools. It was slightly over 180 times downloaded and the was no complaint at all. Please have a look if you have this regvalue: "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId" Thank you.
Pride 07. Aug 2012	@darkelf I receive this "Coudln't read value" error too. I have Win7 64 Bit. I've checked the registry path, but there is no "DigitalProductId" under "CurrentVersion"; However, there is a "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DefaultProductKey" and it has some keys named "DigitalProductId", "DigitalProductId64" and "ProductId". The first two are of type REG_BINARY and the latter one is of type REG_SZ I hope this information helps somehow.
darkelf Author 07. Aug 2012	@Pride Now, that's some useful information. If the two others with this message are also use a 64bit Windows, we'll have a winner ;-) I myself use Win7 32bit and there it is the key I mentioned above. Unfortunately I have no 64bit Win7 but if the two others are also using 64bit, I will make a fixed version of the KeygenMe which takes the different key under the 64bit OS into account. Thank you very much.
Saduz 08. Aug 2012	I use Windows Xp Service Pack 3 and there is no nag.
Pride 08. Aug 2012	@darkelf Maybe you should read the path to the reg key from a .ini file so everyone can change the path to that reg key, because it seems that everyone has this value stored somewhere else :S
darkelf Author 08. Aug 2012	@Pride No, it's not! It is just different in the 32bit and the 64bit version. I will install a 64bit version of Win7 today and adjust the KeygenMe. My fault was that I didn't take into account that someone really uses a 64bit OS for reversing.
JMBrito 09. Aug 2012	About the read value problem, use this to bypass the message: 0040243E EB 1E JMP SHORT KeygenMe.0040245E
darkelf Author 10. Aug 2012	@JMBrito your patch may circumvent the message but you won't be able to do a working keygen then. I've asked the moderators to enhance the KeygenMe description and add a "32bit only" guideline. Sorry for this.
darkelf Author 01. Sep 2012	Well, maybe I should have chosen a somewhat higher level. Level "2" was a bit dewy-eyed, I guess. You know, if you code a KeygenMe, it will look a lot easier than it is in fact. Maybe it's more a level "4".
tamaroth Moderator 04. Sep 2012	The main problem for people, I believe, is that you wrote it in pascal, the language many of us consider extinct. So it might take some time before anyone reaches any conclusions on how this works (you know, we have to familiarise ourselfs with pascal once again)
tamaroth Moderator 04. Sep 2012	edit: I'm sorry, not pascal but basic :)
tamaroth Moderator 04. Sep 2012	name: tamaroth mail: tamaroth[at]tamaroth[dot]eu (fake, obviously, you must replace [at] with @ and [dot] with .) serial: ADC76CFDC6598A6A10BDEDCEDADE9095184D7138D6B87 in order for this to work, you must create a new user called 'tester' or simply change your name because serial is dependant on os username. Authors intention was for serial to be dependant on C: drive's volume serial number, but due to the bug in code, it's completely irrelevant. I'll write a keygen soon.
darkelf Author 05. Sep 2012	Well done tamaroth. The bug is really a pity. Right now I'm digging to find the reason for it. I'd consider the language not a problem. As I wrote, it's PureBasic NOT Basic which is a whole different thing. PB has no crappy runtime like Basic has and it produces nice, clean and tiny Assemblercode. Actually, the Assembler used is FASM. If I hadn't played with the first bytes myself, PEiD identifies the .exe as FASM. Again, well done. I'm looking forward to your keygen although I fear that the bug took away a lot of the difficulties.
tamaroth Moderator 05. Sep 2012	The bug's you use 'C:' as a root while it should be 'C:\'. From MSDN: If this parameter is NULL, the root of the current directory is used. A trailing backslash is required. For example, you specify \\MyServer\MyShare as "\\MyServer\MyShare\", or the C drive as "C:\". The bugitself simplifies things somewhat, I have just have two values that are static rather than computed from hdd's serial. I tell you what, I'll code the keygen like you would've used correct value for GetVolumeInformationA and in meantime you can fix it :)
darkelf Author 06. Sep 2012	@tamaroth the bug should be fixed now. Please give it a try.
tamaroth Moderator 11. Sep 2012	Now it makes it more interesting, I need to trace the regkey generation (damn fpu ...) and the formentioned keys. At the moment I don't really have time to write a fully working keygen, but maybe soon.

Darkmaster2's KeygenME#1

Download keygenme.zip, 4 kb (password: crackmes.de)
Browse contents of keygenme.zip

My first KeygenME.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 16. Aug, 2003
Downloads: 796

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Solutions

Solution by stanleywhite, published 15. oct, 2003; download (93 kb), password: crackmes.de or browse.

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Discussion and comments

_DarKPhoeniX_'s ADA CrackMe #1 (ELF)

Download ADAcrkme.tar.gz, 12 kb

This crackme has been coded in ADA language.
For this reason, you have to put 2 libs in /usr/lib to run it :
http://darknet.dark.sk/~darkphoenix/libgnat-3.4.so.1
http://darknet.dark.sk/~darkphoenix/libgnarl-3.4.so.1

I wish someone could defeat it, 'cause nobody did it at this time :o]
GL!

Difficulty: 5 - Professional problem to solve
Platform: Unix/linux etc.
Language: Unspecified/other

Published: 01. Jul, 2005
Downloads: 396

Rating

Votes: 3
Crackme is quite bad.

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Discussion and comments

Oorja-HalT 01. Jul 2005	nebody manage to run this . I have segmentation fault in my Fedora Core3. yes i have downloaded both the libs. But dont think it ha sanything to do with the fault. Beside unpacking UPX generates header checksum error
_DarKPhoeniX_ Author 01. Jul 2005	This crackme has been coded under Fedora Core3. I've tested it under Gentoo and Debian without any problems (on IA-32 systems of course) For your corrupted header after unpacking, it is normal! :) The ELF just has what it need to run, some ELF structure has been modified (that's why gdb or objdump reject it). That's very weird it doesn't work on FC3 :\| Check dependencies with ldd :/
_DarKPhoeniX_ Author 01. Jul 2005	It works fine too under slackware and under knoppix. It has no reason to fault ! I think the problem is coming from the httpd : some people told that they needed to download it twice cause the download were corrupted. I'm going to check that
devilsclaw 29. Sep 2005	my current linux im running is a modded version of Linux From Scratch 6.1 and BLFS 6.1 to run this crack me you need to get a compiler with ada installed.. http://www.linuxfromscratch.org/blfs/view/stable/general/gcc.html this explains how to do that.. then you need to make some links to the libs like this cd /usr/lib ln -s /usr/lib/gcc/i686-pc-linux-gnu/3.4.3/adalib/libgnarl-3.4.so libgnarl-3.4.so.1 ln -s /usr/lib/gcc/i686-pc-linux-gnu/3.4.3/adalib/libgnat-3.4.so libgnat-3.4.so.1 depending on where you install your gcc... you might want to install it in to a diff location depending on your current compiler on your system the have another tutorial on how to install gcc in a diff location.. anyway this got the crackme running on my system GL and enjoy
0xf001 28. Oct 2005	hey man pls fix your download page or include the libs in the tgz! i want to try your crackmeeeeeeeeee!!! :)
_DarKPhoeniX_ Author 09. Nov 2005	Yes sorry, I just realized that my HTTP Links have died... Here are the new links : http://www.frenchreversing.info/misc/libgnarl-3.4.so.1 http://www.frenchreversing.info/misc/libgnat-3.4.so.1 You might also get some useful packages depending on your distribution system here : http://rpmfind.net/linux/rpm2html/search.php?query=libgnat&submit=Search+... This crackme have been compiled with libgnat version 3.4, it may work with higher versions but not with older. I cannot include the libs inside the tarball cause of their size ! HF

_DarKPhoeniX_'s ADA CrackMe #1 (PE)

Download AdacrkmeWIN.zip, 85 kb (password: crackmes.de)
Browse contents of AdacrkmeWIN.zip

Hi!
This is a win32 crackme coded in pure ADA language.
I've already posted this crackme, but it was for the GNU platform.
Given nobody defeated it, I compiled it under win32. This will surely much easier :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 29. Jul, 2005
Downloads: 524

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Discussion and comments

indivisible_int 03. Jun 2007	what are the rules for your crackme?
redoC 08. Sep 2010	probably bugged... calling exit() right before "Thanks For Registering"
Raham2755 09. Sep 2010	Ha ha its pretty easy if the user enter right data your app will exit. why? because of it: 00403646 E8 9DDFFFFF CALL hello.004015E8 this call goes on MSVCRT.Exit Ok Buddy? needed patch: NOP 2 BYte: 403644 NOP 5 Byte : 4015F7
redoC 09. Sep 2010	wow man, thanks
redoC 14. Sep 2010	As initialization value of hash algorithm uses value of stack pointer which can be different on different machines. Code is buggy and quite messy. Calling of exit() right before good boy message is only tip of the iceberg. It probably can't be solved.

darkusurp's darkusurp login ver 1.00

Download MARTIN_LOGIN.zip, 1855 kb (password: crackmes.de)
Browse contents of MARTIN_LOGIN.zip

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 10. May, 2008
Downloads: 732

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Solutions

Solution by costy, published 01. jul, 2008; download (3897 kb), password: crackmes.de or browse.

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Discussion and comments

MACH4 11. May 2008	An unhandled exception occurred on my box at start up! also, what a big file this is for a Log-in form! MACH4
MACH4 11. May 2008	After running your crackme, the system has crashed! Visual studio not workng either, having to re-install! MACH4
Sinok 12. May 2008	Seems like there's a hidden message in your comments ;P
costy 14. May 2008	An unhandled exception occurred on my box at start up! > I have the same problem
MACH4 14. May 2008	I found the crashing was due to another cause but the exception occurrence is when loading the Crackme...
TiGa 15. May 2008	I see an error message from the .NET Framewowk about a missing path but it's not a fatal error that prevents the crackme from being solved.
costy 01. Jul 2008	The language is not Visual Bacic. It's a .Net application.
costy 01. Jul 2008	I founded the right user name and password... The crackme shows the main form... is this the secret area??
costy 01. Jul 2008	ok... the moderator changed the language... Language: .NET (not VB)
simonzack Moderator 02. Jul 2008	hmmm, just a pass+string1+username+string2 could be more like difficulty: 1 i found the secret area more interesting than the crackme :p

Dark-Graveyard's Dark-Graveyard CrackMe V 7.0

Download CrackMe_V7.zip, 16 kb (password: crackmes.de)
Browse contents of CrackMe_V7.zip

Dark Graveyard Crackme V 7.0

Main goal: Make a patched file that can be run from any debugger without using plugins
2nd goal: Find a valid serial
3rd goal: Make a keygen

A valid solution must contain at least frist two goals.

Platform: Windows
Language: Visual Basic
Difficulty: 2/10 Easy Windows crackme

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 18. Oct, 2007
Downloads: 651

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Solutions

Solution by x4uth, published 06. nov, 2007; download (33 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 19. Oct 2007	OK, i solved it. It took lot of time to brak all tricks, i preferred to make a patch to avoid all starting protections. As soon i can i'll write a solution.
Dark-Graveyard Author 19. Oct 2007	Very Good Evo ;)
ulaterck 23. Oct 2007	Hi I also I have solved , CrackSLatinoS, if you want i submit my solutionof the patch-keygen, serial valid and the unique problem is that the tutorial is in Spanish but it does have several images to understand: P
Dark-Graveyard Author 23. Oct 2007	Hi ulaterck, i'm very happy that you try my crackme..... Unfortunately, i'm italian and i don't understand spanish... if you can, try to write the same tute but in english language ... Bye Bye
zairon Moderator 24. Oct 2007	Yes, English is our international language.

Dark_Nexis's AuthForm by Shan0x228

Download AuthFORM.zip, 227 kb (password: crackmes.de)
Browse contents of AuthFORM.zip

A slightly challenging, native coded, crack me that has some simple defense.
Visual Studio 2013,
C#,
Packed.
==Thanks==

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 25. Aug, 2016
Downloads: 479

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Discussion and comments

li0nsar3c00l 23. Nov, 22:56	unpack or dump enigma virtual box. then its just a single branch

Dark_Prince's My first crackme in Java

Download Crackme01_Java.zip, 7 kb (password: crackmes.de)
Browse contents of Crackme01_Java.zip

Hi, this is my first crackme!
just find the Correct key and write a solution for it.
as it is written in java so JRE must be installed in your machine.

Difficulty: 1 - Very easy, for newbies
Platform: Multiplatform
Language: Java

Published: 04. Oct, 2012
Downloads: 469

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Solutions

Solution by bittujoju, published 19. may, 2015; download (211 kb), password: crackmes.de or browse.

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Solution by deurus, published 07. oct, 2012; download (27 kb), password: crackmes.de or browse.

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Solution by _pusher_, published 07. oct, 2012; download (37 kb), password: crackmes.de or browse.

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Discussion and comments

_pusher_ 04. Oct 2012	Just keygenned my first java app but it would feel wrong to post it since iam a moderator once again. Iam very new to java and i thank you for this :) Name: _pusher_ Country: Sweden Serial: 819032 Name: _pusher_ Country: India Serial: 808524
whizz 05. Oct 2012	_pusher_: I'm happy that you solved it, but why do you have to post it in comments ? Why don't you submit a solution and rather post that 'I've submitted a solution.' ?
_pusher_ 05. Oct 2012	I wrote a solution and a keygen for android with included source but i cant accept the solution myself that would feel wrong.
tomkol 05. Oct 2012	There are other mods. They can accept it.
deurus 07. Oct 2012	deurus other 819920
Dark_Prince Author 07. Oct 2012	Yeah, right deurus:), and thanks for your solution _pusher_.
_pusher_ 07. Oct 2012	Yep thanks deurus for source :)
pkowner646 23. Nov 2012	Patching it , was so easy :d thanks for the challange though too tired to make a serial :D
LFalch 02. Apr 2013	Cracked it! I know other people have already cracked it but that doesn't mean it's not fun. Name: LFalch Country: Other Key: 703296
Otaka 05. Dec 2013	Pretty easy name :Otaka coutry:Other Key :642320
jusgif 21. May 2015	Nice and easy, even made a small keygen for it :) I enjoyed it Name: yay Country: Other Key: 483960 Name: jusgif Country: Other Key: 805712 Name: José Country: Mexico Key: 680097

dark-puzzle's Dark-Puzzle KeygenMe #1

Download Dark-Puzzle_KeygenMe_#1.zip, 1 kb (password: crackmes.de)
Browse contents of Dark-Puzzle_KeygenMe_#1.zip

This is a KeygenMe right ? so making some patches won't get you anywhere =) .
Your mission is to make a valid Keygen that will generate a random serial, coding the keygen may get a little harder.

It was very fun to code the keygenme =) . 3nj0y

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 30. Jul, 2013
Downloads: 220

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Solutions

Solution by tinqnpro, published 24. sep, 2013; download (82 kb), password: crackmes.de or browse.

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Discussion and comments

Noteworthy 02. Aug 2013	Cracking done, thanks for coding it.
c0R3 05. Aug 2013	very easy :D thanks for it

DataBus's DataBus' Keygenme1

Download keygenme.zip, 1 kb (password: crackmes.de)
Browse contents of keygenme.zip

Write a keygen for this keygenme in any language of your choosing.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 17. Apr, 2013
Downloads: 915

Rating

Votes: 7
Crackme is boring.

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Solutions

Solution by jhon, published 22. apr, 2013; download (311 kb), password: crackmes.de or browse.

jhon has rated this crackme as nothing special.

Solution by Office Jesus, published 22. apr, 2013; download (135 kb), password: crackmes.de or browse.

Office Jesus has rated this crackme as quite nice.

Solution by iSSoGoo, published 22. apr, 2013; download (57 kb), password: crackmes.de or browse.

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Discussion and comments

DataBus's DNA Keygenme 1 by DataBus

Download DNA_Keygenme_by_DataBus.zip, 35 kb (password: crackmes.de)
Browse contents of DNA_Keygenme_by_DataBus.zip

Write a keygen for the program. No cracking or brute forcing allowed. There are multiple serial solutions per username.

Your keygen should output the most elegant solution.

Most importantly, have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 02. Jan, 2014
Downloads: 735

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by rookie, published 26. mar, 2014; download (13 kb), password: crackmes.de or browse.

rookie has rated this crackme as quite nice.

Send a message to DaXXoR 101 »

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Discussion and comments

evaboy 16. Jan 2014	Olly says Bad or unknown format of 32-bit .exe. Please recode and recompile, or is there any trick behind?
tinqnpro 18. Jan 2014	@evaboy: It's a simple trick. Using StrongOD to fix this or just set a breakpoint at EP.
DataBus Author 18. Jan 2014	@evaboy: It's because NumOfRvaAndSizes is set to a value that it should not be. A simple anti-debugging trick that can be fixed by either changing the value or using some kind of plugin for ollydbg. Looking forward to seeing someone solve this :)
evaboy 18. Jan 2014	Ok. It's perfect on win xp. Then l used it on win 8 pro x64 bit.
khalid12a 05. Feb 2014	i dont understand, how way?
DataBus Author 05. Feb 2014	I am not sure what your question is khalid12a? The keygen is based off of a simplistic approach on the transcription and translation of Deoxyribonucleic Acid in eukaryotes- it features post-transcriptional modifications (i.e. capping and tailing, intron removal; alternative splicing) however, not all of said features are implemented as it would not be appropriate for a level 1 keygenme if they were. A magic value is generated from the username and then a simple math algorithm must be solved based on said magic value for the serial
murom 07. Feb 2014	It was not easy. 1. Length username 8 symbols 2. Length serial 12 symbols 3. The serial should be used only letters: A, T, C, G 4. Start serial: TAC 5. End serial: ACT or ATC or ATT 6. Username code = sum all symbols-fmod(sum all symbols/11), wherein symbols=ASCII code 7. Serial code = sum all symbols, except first 3 and last 3 symbols serial, wherein A=00, T=00, C=10, G=11 8. Username code = Serial code Example. Username:CCCCCCCC Serial:TACATAACAATT
DataBus Author 07. Feb 2014	You are correct murom. It is a simple approach that behaves theoretically just like DNA transcription and translation. I hope you enjoyed it and learned something from it. I thought it was appropriate for a level 1 keygen me because it uses very basic math and is really nothing math intensive. Additionally, it doesn't use libraries for hashing that will add tons of code to the executable.
Jayvic 15. Feb 2014	@DataBus I get a different answer with @murom. Suppose the length of username = lu. lu >= 8 && lu % 4 == 0. Suppose the length of serial = ls. ls >= 12 && ls % 3 == 0. Before calculate the "Serial code", "DNA Keygenme 1 by DataBus" will delete the last x symbols from the serial. I don't know how to calculate x. I only know that x = 0, 3 or 6. Then "DNA Keygenme 1 by DataBus" will delete all the letters after the "End serial(ACT or ATC or ATT)". And I find that the example @murom gives is wrong. But Username:CCCCCCCC,Serial:TACATAACAATTAAAAAA is right.
DataBus Author 16. Feb 2014	@Jayvic: I didn't actually test his solution, but what he was saying seemed right. The keygen technically behaves like DNA transcription and translation in DNA translation only the codons between the start codon and the stop codon are used to produce the protein. Therefore, in my keygen, only the values between the start codon and the stop codon are used. 0, 3, or 6 nucleotides can be removed from the end of the chain due to degradation once it leaves the nucleus Hopefully this answers your question; but if it doesn't feel free to reply and I will answer it as soon as I see it
DataBus Author 16. Feb 2014	Also, if you are interested in the source code of this keygen (to compare it to your analysis) I'll happily upload it to pastebin and PM it to you. Just let me know.
Jayvic 17. Feb 2014	@DataBus: Got it. Thank you very much for your answer.
albertus 19. Feb 2014	here is my keygen in python and tutorial, which were rejected http://pastebin.com/j5M4WwKW http://pastebin.com/tGDuHmWD
cr00k3dc0d3r 28. Mar 2014	Hi DataBus, Just wanted to say this is a very creative and unique crack me! Nice Work!
bill xiao 04. Apr 2014	AAAAAAAA TACACTACTACT It's a interesting crackme!
Nephron 16. Apr 2014	ABABABAB TACATTTAGCTAGCT Was quite fun!
DataBus Author 19. May 2014	I'm happy that you guys all enjoyed my keygen. I would just like to say that it was inspired by some basic biochemistry (specifically DNA) The keygen is based off of a simplistic approach on the transcription and translation of Deoxyribonucleic Acid in eukaryotes- it features post-transcriptional modifications (i.e. capping and tailing, intron removal; alternative splicing) however, not all of said features are implemented as it would not be appropriate for a level 1 keygenme if they were.

Discussion and comments

ap0x 16. Jun 2005	Anyone tried this? It keeps checking empty address with entered serial! And if i make it check two the same values, it still shows bad boy message and exists!
kao 16. Jun 2005	It's not what it seems to be. Did you check timers and threads? ;) Have fun!
DaXXoR 101 Author 16. Jun 2005	Notice i never said how the valid serial was inputted. :) I solved this one myself before I submitted it, I know it can be done.

DaXXoR 101's DaXXoR's First

Download DaXXoR.zip, 88 kb (password: crackmes.de)
Browse contents of DaXXoR.zip

Just find the hardcoded serial. Written in Pascal.
First crackme & 1st day with pascal so don't be too hard.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 14. Nov, 2004
Downloads: 1964

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by BoR0, published 16. nov, 2004; download (89 kb), password: crackmes.de or browse.

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Solution by LuCiFeR, published 14. nov, 2004; download (691 b), password: crackmes.de or browse.

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Solution by Bytedevil, published 14. nov, 2004; download (1012 b), password: crackmes.de or browse.

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Solution by haggar, published 14. nov, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by scarabee, published 14. nov, 2004; download (859 b), password: crackmes.de or browse.

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Solution by gadhabi, published 14. nov, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by fabsys, published 15. nov, 2004; download (88 kb), password: crackmes.de or browse.

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Discussion and comments

DaXXoR 101's DaXXoR KeyFile

Download Dax_Cm.zip, 259 kb (password: crackmes.de)
Browse contents of Dax_Cm.zip

I think its quite hard, I don't really know the difficulty. Only tested with WinXP.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 14. Feb, 2005
Downloads: 1348

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Solutions

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Discussion and comments

DigitalAcid 26. May 2008	Bruteforcing a 84 characters long string... yeah, quite hard. Lol.
jinkx 25. Aug 2014	any ideas else than BF?

DaXXoR 101's DaXXoR Multi-Crackme

Download DaXXoR#4.zip, 290 kb (password: crackmes.de)
Browse contents of DaXXoR#4.zip

Unpack, Disable the nag, Find a valid serial. Should be fairly easy.
Cheers,
DaXXoR

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 19. Nov, 2004
Downloads: 1642

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by Oorja-HalT, published 20. nov, 2004; download (7 kb), password: crackmes.de or browse.

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Solution by scarabee, published 20. nov, 2004; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

jinkx
16. Aug 2014

hi everyone,

just a little question to the FLD instruction to understand the mathematic operation.
As it says in the solution, the value from my 2nd inputbox isnt there. Where can i find it?

What i have: 2nd editbox string value: "6544"

1st the Command. ok push something in ST(0)

00401C97 . DD45 B4 FLD QWORD PTR SS:[EBP-4C] ;//value in 2nd edit box is loaded in FPU\\

//Does this address [EBP-4C] means the Value is 0xh"00000000 40C60780" ? //=> i think here i do not understand whats going on!?

This is on my Stack:

EBP-50 > 40C60780 €Æ@
EBP-4C > 00000000 ....
EBP-48 > 40B99000 .¹@
EBP-44 > 00000000 ....

What is my FPU register looks like before command:

EAX 00184000
ECX 0018F2A0
EDX 0018F27C
EBX 004D4DB4
ESP 0018F248
EBP 0018F2B0
ESI 0049E390 unpacked.0049E390
EDI 0018F434
EIP 00401CAE unpacked.00401CAE

ST0 empty g
ST1 empty g
ST2 empty g
ST3 empty g
ST4 empty g
ST5 empty g
ST6 empty g
ST7 empty g
3 2 1 0 E S P U O Z D I
FST 4000 Cond 1 0 0 0 Err 0 0 0 0 0 0 0 0 (EQ)
FCW 1372 Prec NEAR,64 Mask 1 1 0 0 1 0

and after command:

EAX 0018F2A0
ECX 0018F2A0
EDX 0018F27C
EBX 004D4DB4
ESP 0018F248
EBP 0018F2B0
ESI 0049E390 unpacked.0049E390
EDI 0018F434
EIP 00401C9A unpacked.00401C9A
C 0 ES 002B 32bit 0(FFFFFFFF)
P 1 CS 0023 32bit 0(FFFFFFFF)
A 0 SS 002B 32bit 0(FFFFFFFF)
Z 1 DS 002B 32bit 0(FFFFFFFF)
S 0 FS 0053 32bit 7EFDD000(FFF)
T 0 GS 002B 32bit 0(FFFFFFFF)
D 0
O 0 LastErr ERROR_SUCCESS (00000000)
EFL 00000246 (NO,NB,E,BE,NS,PE,GE,LE)
ST0 valid g
ST1 empty g
ST2 empty g
ST3 empty g
ST4 empty g
ST5 empty g
ST6 empty g
ST7 empty g
3 2 1 0 E S P U O Z D I
FST 7800 Cond 1 0 0 0 Err 0 0 0 0 0 0 0 0 (EQ)
FCW 1372 Prec NEAR,64 Mask 1 1 0 0 1 0

thanks for comment this
regards

DaXXoR 101's DaXXoR - Decryptme

Download DaXXoR_.ZiP, 247 kb (password: crackmes.de)
Browse contents of DaXXoR_.ZiP

Defeat the debugger detection, Disable the nag, and decrypt the message.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 09. Jan, 2005
Downloads: 1657

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by ViRUs2qp1 - EV, published 18. jan, 2005; download (10 kb), password: crackmes.de or browse.

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Solution by _HellDashX_, published 18. jan, 2005; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

FlyFire 18. Nov 2010	Thanks DaXXoR101 for his decryptme. Thanks for HellDashX's solution.It really helps me a lot

DaXXoR 101's DaXXoR - KeygenMe

Download DaXXoR#9.ZiP, 292 kb (password: crackmes.de)
Browse contents of DaXXoR#9.ZiP

It's really pretty easy if you think about it. unpack & make a Keygen. No patching.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 26. Nov, 2004
Downloads: 1608

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by REA-CrAcKeRtEaM, published 01. jan, 2005; download (63 kb), password: crackmes.de or browse.

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Discussion and comments

DaXXoR 101's DaXXoR - KeygenMe#2

Download DaXXoR#11.zip, 240 kb (password: crackmes.de)
Browse contents of DaXXoR#11.zip

Make a Keygen for this crackme, lil\' bit tricky!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 07. Dec, 2004
Downloads: 1504

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by scarabee, published 11. dec, 2004; download (5 kb), password: crackmes.de or browse.

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Solution by REA-CrAcKeRtEaM, published 11. dec, 2004; download (62 kb), password: crackmes.de or browse.

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Discussion and comments

DaXXoR 101's DaXXoR - PatchMe

Download DaXXoR#10.ZiP, 249 kb (password: crackmes.de)
Browse contents of DaXXoR#10.ZiP

Simple c++ patchme. Just enable (or disable) everything this crackme tells you to.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 26. Nov, 2004
Downloads: 2105

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by _HellDashX_, published 12. jan, 2005; download (5 kb), password: crackmes.de or browse.

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DaXXoR 101's DaXXoR - Registry Crackme

Download DaXXoR#8.ZiP, 288 kb (password: crackmes.de)
Browse contents of DaXXoR#8.ZiP

Relatively easy crackme. Watch your registry closely. Find the valid Serial/Registry key. No patching.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 24. Nov, 2004
Downloads: 1503

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by Scortile, published 26. nov, 2004; download (990 b), password: crackmes.de or browse.

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Solution by scarabee, published 26. nov, 2004; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

r-Evolution 29. Sep 2010	I loved the crackme it is unique.I will upload my solution after i finish it :P

DaXXoR 101's DaXXoR - serial&CD-Check

Download DaXXoR#6.zip, 257 kb (password: crackmes.de)
Browse contents of DaXXoR#6.zip

Simple but colorful crackme, Unpack, Patch a cd-check, find a valid serial (you need to patch the cd-check first).

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 23. Nov, 2004
Downloads: 1688

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by ViruX, published 24. nov, 2004; download (8 kb), password: crackmes.de or browse.

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Solution by fabsys, published 24. nov, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by _HellDashX_, published 24. nov, 2004; download (14 kb), password: crackmes.de or browse.

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Solution by scarabee, published 24. nov, 2004; download (7 kb), password: crackmes.de or browse.

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DaXXoR 101's DaXXoR - Time Trial

Download DaXXoR#7.zip, 293 kb (password: crackmes.de)
Browse contents of DaXXoR#7.zip

unpack, patch the nag, disable the time limit - Time left MUST be above zero. Theme might look a little wierd on WinXP

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 24. Nov, 2004
Downloads: 2000

Rating

Votes: 4
Crackme is boring crap.

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Solutions

Solution by Scortile, published 26. nov, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by scarabee, published 26. nov, 2004; download (4 kb), password: crackmes.de or browse.

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DaXXoR 101's D_KeygenMe

Download Keygenme.zip, 45 kb (password: crackmes.de)
Browse contents of Keygenme.zip

This crackme was written in D :: http://www.digitalmars.com/d/

Keygen it.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 18. Mar, 2005
Downloads: 2046

Rating

Votes: 3
Crackme is boring crap.

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Solutions

Solution by aldeid, published 10. dec, 2015; download (118 kb), password: crackmes.de or browse.

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Solution by morecode, published 02. nov, 2012; download (184 kb), password: crackmes.de or browse.

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Solution by Kreet, published 19. mar, 2005; download (65 kb), password: crackmes.de or browse.

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Solution by TiGa, published 19. mar, 2005; download (35 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

dom1n00 01. Apr 2008	yepp, easy to fish serial in 2 sec :)
Sinok 02. Apr 2008	Easy, tho it was the first program I have ever seen written in D :O Good job o.o
aldeid 05. Dec 2015	My solution posted here: https://www.aldeid.com/wiki/Solution-DaXXoR-101-D-KeygenMe
hanna21 22. Jun, 01:33	i found the string and went to address how ever i cannot find jne or je etc above or no arrows just dots so its little tricky how do i work out from there. i found my break point but how do i get started here.

DaXXoR 101's FLTK KeygenMe

Download daxxor_FLTK.zip, 203 kb (password: crackmes.de)
Browse contents of daxxor_FLTK.zip

KeygenMe written in FLTK, only tested on WinXP.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 02. Feb, 2005
Downloads: 1816

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by Orphankill, published 19. aug, 2005; download (158 kb), password: crackmes.de or browse.

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Solution by Boombuler, published 08. aug, 2005; download (206 kb), password: crackmes.de or browse.

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Solution by ap0x, published 05. feb, 2005; download (5 kb), password: crackmes.de or browse.

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Solution by _HellDashX_, published 05. feb, 2005; download (95 kb), password: crackmes.de or browse.

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Discussion and comments

DaXXoR 101's FreakDropper Series #1

Download FreakDropper_v0.9a.zip, 2 kb (password: crackmes.de)
Browse contents of FreakDropper_v0.9a.zip

Packed with my own monster :: FreakDropper v0.9a

Note: almost all crackers will get a validation error running this exe, that is because it checks for installations of cracking tools as well as if they are running.

Difficulty: 7 - Very hard
Platform: Windows
Language: Assembler

Published: 20. Aug, 2005
Downloads: 990

Rating

Votes: 8
Crackme is boring.

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Solutions

Solution by _HellDashX_, published 22. aug, 2005; download (13 kb), password: crackmes.de or browse.

_HellDashX_ has rated this crackme as quite nice.

Solution by deroko, published 22. aug, 2005; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

deroko 20. Aug 2005	very very nice =) So objetive is only to dump it?
deroko 20. Aug 2005	yah, got it, submitted solution + dumped file =)
Knight 20. Aug 2005	Deroko, what unpacked exe should do? I unpacked it but it seems it does nothing useful.
deroko 20. Aug 2005	it just prints message(dialog): This exe is protected with: FreakDropper Version 0.9a...
_HellDashX_ 20. Aug 2005	I unpacked it but the crackme have a little problem, the user32 imports dont works, :( Because it, the crackme dont show any dialog as deroko said, i try it without debbuging and dont show anything too, :( Perhaps is a bug? I use Windows XP SP2
deroko 20. Aug 2005	I have winxp sp2, and it works fine =) have no idea what is causing problems =(
_HellDashX_ 20. Aug 2005	Weird, sometimes works, sometimes dont work...well, i will submit my solution, :)
code_inside 20. Aug 2005	At offset 00401002 it tries to call (I think) GetModuleHandleA, but the offset to this API is hardcoded in the .exe, and so are some other API's... :)
TQN 21. Aug 2005	I patched two string: "software\uCF2000" and "software\UInC", and on my machine, XP SP1, it does not show anythings. Seem it open explorer.exe process, read 5 bytes at 0x4A80B6. Sorry if I wrong !
Knight 22. Aug 2005	I think there's a bug in protector. That program doesn't run on my machine. Somekind problems with imports. I see that deroko's dump have DialogBoxIndirectParamA, when for me it points to nowhere (not really, somewhere near CreateIconFromResource). And it's probably not dumping problem since even original file doesn't runs properly (at first i thought that it maybe detects some of my tools, but after cleaning registry nothing have changed). I'm using WinXP sp2 with newest updates.
deroko 22. Aug 2005	well it has fixed imports from user32, actually hardcoded addresses so it might cause a problem =( I have sp2 too, but no latest updates =)
_HellDashX_ 22. Aug 2005	Yes, in my first dump, it dont work, but i need fix the user32 imports by hand, :( Now, works perfect. I am using Windows XP SP2 with the las t updates too
Knight 22. Aug 2005	Deroko, the problem is not in your dump, it works fine. Problem is in packer itself, since i can't run protected file (nor dump done by myself). When i run it, simply nothing happens (at very begining i thought that it might be because it detects some tools in my system, and now i know it's because mess with IT). I just want to say that DaXXor 101 should fix his packer/protector compatibility issues in future versions. BTW DaXXor will u share your packer with public?
deroko 22. Aug 2005	yap I know, all user32 apis are hardcoded in packer =) When I said fixed I meant hardcoded =) Well english isn't my native language =)
DaXXoR 101 Author 22. Aug 2005	Good Solutions :) Sorry about the hardcoded API bug. I have fixed it for the next version. As for sharing the protector with the public, it is not a normal protector. It is actually a set of tools that will crypt and split the sections of an exe and put them in an .asm file with decryption and protection code. So really it is a way of protecting an exe manually. I will probably write a tutorial on how to do that, but not share the programs themselves. In the next crackme I will include the source code for the previous packed exe.

DaXXoR 101's KeygenMe #3

Download Keygenme_Daxxor.zip, 9 kb (password: crackmes.de)
Browse contents of Keygenme_Daxxor.zip

Keygen it & disable the nag. Not quite as easy as it sounds.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 11. Apr, 2005
Downloads: 8250

Rating

Votes: 7
Crackme is boring.

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Solutions

Solution by l0calh0st, published 31. mar, 2006; download (17 kb), password: crackmes.de or browse.

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Solution by Vohligh, published 16. apr, 2005; download (2 kb), password: crackmes.de or browse.

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Solution by K-Res, published 16. apr, 2005; download (47 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

code_inside 30. Apr 2005	A little comment on the solutions. Instead of NOP'ing those whole procedures you can just patch the first instruction "6A10 - push 10" to a "EB11 - jmp 0040104F" at offset 00402083 :)
_RoS_128 21. Jun 2008	That was cool -- I learned a lot. Thanks DaXXoR!
ayeyen 17. Sep 2008	That memory trick was super clever.
lanzaa 10. Aug 2009	Easy, cool little memory trick.
shan75 07. Jan 2010	MOV DWORD PTR DS:[403C64],JMP.&user32.GetWindowTextA> SUB DWORD PTR DS:[403C64],9 PUSH 1FF CMP EBX,1 JNZ SHORT crackme.00401241 PUSH crackme.00403054 PUSH DWORD PTR DS:[40304C] JMP SHORT crackme.0040124C PUSH crackme.00403654 PUSH DWORD PTR DS:[403050] CMP EBX,1 JE SHORT crackme.00401258 confusing about this piece of code please help me..
SimpleData 03. Feb 2010	That WriteProcessMemory trick was nice.
mem0rex 08. Oct 2010	http://www.virustotal.com/file-scan/report.html?id=efc41119337f4a366c506d566a47d593396ed562ee487994e95f566347a2723f-1284647894
AkaBkn 19. Oct 2010	yhea: this was my first try in reverse engineering. cool! learned a lot and managed to write a keygen. but the submission is closed... :(
AkaBkn 19. Oct 2010	ahh. forgot that -> AkaBkn:@N-CLKY]-QZU
jxzhxch 09. Dec 2010	Easy,trick was nice.
wibf 16. Mar 2011	nudge screen was tricky nice job man
yo-mismo 23. Mar 2011	simple but nice crackme
newcracker88 27. Sep 2012	please help me this is my first crackme
w1ck3dg0ph3r 17. Oct 2012	A little addition to the comment on the solutions =) Its not enough to patch EB11 @ 00402083, cause it would not pass the checksum test later. So my solution is: 00402083 <- EB 11 ; Let the memory trick patch for us 00401636 <- 40 ; Fix checksum after patching
kalkunipraed 09. Apr 2013	This was the first keygenMe-CrackMe I have ever solve - it was fun and I learned a lot. Thanks!
lykaner 17. Sep 2013	I've a question on patching the nag: My 1st solution were the following patches (similar to l0calh0st IIRC): 0040103C EB 11 JMP SHORTcrackme.0040104F 004014DC 6A 00 PUSH 0 0040163A EB 07 JMP SHORT crackme.00401643 But if I overwrite 00401037 until 0040104E with NOPs instead of the first to patches and correct 0040163A as I've written, the program crashes if I click on "Check". Could somebody explain what I've overseen, please?
lykaner 18. Sep 2013	Never mind, I've found my failure: In the procedure stating at 00401477 you can see that the process id is copied to 00403C80. The procedure starting at 004015B3 checks if the program was patched. At 004015C2 it calls the address located at 00403C80. But if 00401477 is never called 00403C80 consists of zeros. Therefore you have to overwrite the call of 004015B3 at 00401449 with NOPs.
cracker_bug 14. Jun 2014	good crackme ! Made a python script to keygen it : http://pastebin.com/CCjxW3VK
aldeid 06. Dec 2015	My detailed solution here: https://www.aldeid.com/wiki/Solution-DaXXoR-101-KeygenMe-3
Twelfthnight 16. Feb, 17:47	I finally solved this crackme as a college student! This is my first attempt on reverse-engineering, feelsgoodman.

DaXXoR 101's KeygenMe #4

Download KeygenMe#4.zip, 7 kb (password: crackmes.de)
Browse contents of KeygenMe#4.zip

Write a program that can generate valid keys.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Assembler

Published: 21. Jul, 2005
Downloads: 1065

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by _HellDashX_, published 25. aug, 2005; download (24 kb), password: crackmes.de or browse.

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Solution by bRaiN_faKKer, published 23. aug, 2005; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

GR33d 02. Aug 2005	hi ok ... im a half noob just got some keygen mes a bit harder and this is one... if i stay on level 1-2 keygenmes ill never get n better on reversing, so i tryed this one .... ok the protection(packed) is gone so now.... the algo.. ok i already figured it out.. but i just couldnt find a way to reverse it!! it has some un-reversible checksum on the serial inserted.... im a bit confused... about this one, cus i cant reverse it ! daxxor can u help me out ?
DaXXoR 101 Author 02. Aug 2005	hey Gr33d, ok let me give you a hint, this is how you'd keygen the last serial box. checksum = CMP BH,1E rite? say ebx is 00001E00 at the end, that means all you have to do is perform all the steps it did to get the final result backwards. That also means the other parts of ebx can be any number. thats how we get different keys. Heres a valid key: 91B512A707-021222682H-1FF46L5220-2067120286 good luck!
GR33d 02. Aug 2005	great ! thats a big help :) but, i did try to reverse the 4 algos(ithink there are 4) whitout n sucess, it is still missing something... ill keep trying thx 4 the help :D

DaXXoR 101's TrainerMe 1.0

Download TrainerMe.zip, 250 kb (password: crackmes.de)
Browse contents of TrainerMe.zip

Only tested on XP. Make a trainer that gives you unlimited ammo & health. Use memory-patching only!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 30. Jan, 2005
Downloads: 1650

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by TiGa, published 02. feb, 2005; download (39 kb), password: crackmes.de or browse.

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Solution by _HellDashX_, published 02. feb, 2005; download (6 kb), password: crackmes.de or browse.

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DaXXoR 101's Vault Crackme

Download Dax.zip, 304 kb (password: crackmes.de)
Browse contents of Dax.zip

100 seconds to Activate and find the unlock key

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 16. Jan, 2005
Downloads: 2079

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by _HellDashX_, published 24. jan, 2005; download (4 kb), password: crackmes.de or browse.

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Dcoder's KeygenME #1

Download keygenme1.zip, 76 kb (password: crackmes.de)
Browse contents of keygenme1.zip

This one is out for the crypto lovers out there, I hope it doesn't disapoint you :)

Remember, only keygen is acceptable solution.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 03. Jan, 2006
Downloads: 629

Rating

Waiting for at least 3 votes
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Solutions

Solution by simonzack, published 25. aug, 2010; download (72 kb), password: crackmes.de or browse.

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Discussion and comments

jB_ 02. Jan 2006	I have just finished to analyse your routine. Now I start to reverse it, and it seems that will give a headache :p

Dcoder's KeygenME #2

Download keygenme2.zip, 77 kb (password: crackmes.de)
Browse contents of keygenme2.zip

In this crackme, your mission will be to produce a working key generator that will make the crackme go "Good!".

Only keygen is a valid solution!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 23. Oct, 2010
Downloads: 459

Rating

Waiting for at least 3 votes
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Solutions

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Discussion and comments

redoC 30. Sep 2012	Final function 00412850 is 60 kB long!

Dcoder's KeygenME #3

Download kgme3.zip, 6 kb (password: crackmes.de)
Browse contents of kgme3.zip

==== KeygenME #3 ====

Hello again. I haven't put anything out in a while, so I decided to make
this little thing. Unlike #2, I tried to make this one as succinct as
possible, so you won't have much to reverse.

The goal is to produce a key generator for arbitrary names, and a write-up.

Have fun,
Dcoder

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 06. Nov, 2012
Downloads: 383

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Solutions

Solution by pk__, published 03. jan, 2013; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

hPlow 07. Nov 2012	I tried, but I failed. something I did "nops" in a conditional jump. But it did not work. I look forward on tutorial!
haggar 08. Nov 2012	If you want to patch it so it shows "Good job!", then you need to NOP two jumps. Open OllyDbg, right click on CPU window, select "Search for ->", select "All referenced text strings" and there you will see 9 ASCII strings. Double click on "Good job!". Below you see "Try again" and above you have two conditional jumps that throw you at that message. So , what are you gonna do? Now you think a little :) It is very easy and straightforward. But keygening... hmm that algo at first glance looks interesting. I would like to give it a try, but I'm so short with time for these things. By
seskissinger2 16. Nov 2012	00C915DC \|. 75 0F JNZ SHORT kgme3.00C915ED 00C915E4 \|. 75 07 JNZ SHORT kgme3.00C915ED Are the two jmp "Haggar" talking about.
a_tek7 27. Nov 2012	Hashes for name and serial are produced almost identical.I mean for serial a special part of code is executed which is not executed for name. So, I have to Brute Force it or I'm wrong?
tamaroth Moderator 03. Dec 2012	Brute force (or rather some form of it) is necessary. name: tamaroth key: 45A88256CC2C4DA7FB073F986DA6F89C However it takes far too long in its current state, so I need to find a way to generate it faster.
pk__ 29. Dec 2012	One way to solve this problem is described here: www.cs.berkeley.edu/~daw/papers/genbday-long.ps % time ./keygen pk c75699f4c79c038da8e83d6172bef93a d59a129cc62b0db2be79bf1482687a84 b922ea4aef7ed1fbe73e4ebe38f8146b f1b728f382e886b280f8177372e3e202 41fd2b233c7807f373a36867b6fcf0e5 32f83a5f4903c7d890f2d1fc42eb752f 7a9a20358b5840cc728b3aba74a44614 ./keygen pk 3.72s user 0.79s system 99% cpu 4.531 total
jenkinspro 30. Dec 2012	ohhh the algo is too long i havnt the patience for that:(

DCrack's Crackme v1.0 by DCrack/FOFF

Download Crackme_1.0_by_DCrack-FOFF.zip, 228 kb (password: crackmes.de)
Browse contents of Crackme_1.0_by_DCrack-FOFF.zip

This is my first crackme :)
No packing, no anti-olly tricks, no obfuscation, no junk code... as straightforward as it gets.
All I need is a valid serial.
I think I left a small window open so this can be crackable.
Feel free to write any comments or suggestions.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 18. Feb, 2008
Downloads: 845

Rating

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Solutions

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Discussion and comments

DigitalAcid 18. Feb 2008	Is bruteforce needed or can it be solved by using lots of grey matter ? Ps: finding character 1, 5 and 10 was easy, 12 more to go =).
Ox87k 18. Feb 2008	I don't think bruteforce is needed, just a brain! I found a serial that don't show me the error msgbox but... congratz message? Where is it? >I think I left a small window open so this can be crackable. It means that if you try a good serial, no congratz message appears to us?
DCrack Author 18. Feb 2008	When a valid key is used, the crackme should display the good boy message. You got it right DigitalAcid :)
Till.ch 18. Feb 2008	@Ox87k I think he more meant with this, that the 3 easy chars can give us a little 'startpoint' on reversing the encrypted function. Like the PUSHAD and RETN on the end it decrypts. I have atm. spare time for this, but indeed interesting crackme :)
Ox87k 18. Feb 2008	@Till.ch: I know this! :)
DCrack Author 18. Feb 2008	Hey Till.ch that's exactly what it is :) No traditional cracking here, just making sense of the decrypted code or bruteforcing. You can see how this can easily be uncrackable may adding perhaps a better encryption, stronger key and no comparison at all (letting the SEH take care of everything); perhaps the last one isn't even necessary. Good work mate. If anyone wants the valid key just write me. I think I'll publish a tute on how this one was coded and how does it work.
DCrack Author 18. Feb 2008	Ps: I don't think bruteforcing is viable (please correct me if I'm wrong). The key has a length of 15, we know 3 already, so that leaves us with 12 characters. Let's say we're not gonna take the whole ASCII codes, but up to 126 decimal (wich are the ones most commonly used, besides I know all the characters are in this range :)). So we have 12 spaces to brute-force that can be filled with, let's say 94 characters (starting at 32). Isn't this 94^12? which equals: 475920314814253376475136 possible combinations. You do the time math :)
apuromafo 19. Feb 2008	good crackme but ~i wait the solution jiji
Absolom1 20. Feb 2008	cracked!!!by ClS\|AbsshA in Crackslatinos, i dont know if that guy has an account here...
DCrack Author 21. Feb 2008	Congrats to whoever did it! Let´s wait for the solution :)
AbsshA 21. Feb 2008	Yes :) i'll send it to moderators. I hope don't mind if the languaje is spanish..
DCrack Author 21. Feb 2008	I saw the solution, this crackme was destroyed by AbsshA :) Thanks for the tutorial bro and congrats! Now I´ll go and make something a little harder :)

tony 14. Nov 2009	very good <:

DeepBlue's Dreadnought

Download Dreadnought.zip, 217 kb (password: crackmes.de)
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============ Dreadnought ================

This Crackme is just some Test of AntiDebug-
Tricks and Code-Obfuscation. There is nothing really
special to expect. Might be a bit full of Junkcode...

Have fun anyways,

DeepBlue aka +++ATH0

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 30. Jul, 2006
Downloads: 716

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by red477, published 27. aug, 2006; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

unicorn 19. Aug 2006	I have runned under olly.may b i can find the file.
DeepBlue Author 28. Aug 2006	Good Job. red477 :)
hcjsj 31. Aug 2006	hi Mr.DeepBlue,Can you send to me your source code? the best code is vc. thank you ! jsjcsf@gmail.com

DeepBlue's Just One Crackme

Download justonecm.zip, 19 kb (password: crackmes.de)
Browse contents of justonecm.zip

- If you type in the right serial a MessageBox comes up and says :" richtig".
(Its german and means: correct)

- Why it is possible that the serial differs on other pcs ?
- Write a keygen ;)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 12. Oct, 2005
Downloads: 722

Rating

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Solutions

Solution by NoRG, published 19. oct, 2005; download (11 kb), password: crackmes.de or browse.

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Send a message to Defc0n1 »

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Discussion and comments

jB_ 16. Oct 2005	Nice :) Rather easy, but interesting (especially because it is packed, that makes the keygen a bit harder to code).
DeepBlue Author 19. Oct 2005	Congrats u both ;)

Defc0n1's Crackme Delphi 1.0 by Defc0n1

Download Crackme_Delphi_1.0_by_Defc0n1.zip, 406 kb (password: crackmes.de)
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Crackme Delphi 1.0 by Defc0n1.exe

Is a very very simple Crackme. I have done it and you neednt an amazing knowledge to solve it. I did it with OllyDbg, you would had it with no more than 5 clicks ;)

I wish you to enjoy.

Mail me at defc0n1@el-hacker.org

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 15. Jun, 2009
Downloads: 1464

Rating

Votes: 7
Crackme is quite bad.

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Solutions

Solution by TripleTordo, published 29. jun, 2009; download (995 b), password: crackmes.de or browse.

TripleTordo has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

c0nfig 15. Jun 2009	:D Password: burninhell
DigitalAcid 15. Jun 2009	Don't post solutions...
c0nfig 15. Jun 2009	)))))) Dig.Acid this crackme level 0!) For Kids ( +3 )
Anton Troskie 30. Jun 2009	Um.... Solution Please....
*DNison** 17. Jul 2009	OPEN WITH OLLYDBG SEARCH FOR: ALL REFERENCED TEXT STRINGS LOOK AT STRINGS: "burninhell" STANDS OUT ENTER "burninhell" into crackme AND YOUR FINISHED NO W32DASM REQUIRED
HellMan1908 25. Jul 2009	hmm i have no found that string ref in win32dasm.. and in olly i have no that menu "all referenced text strings", only search for binary string what i'm doing wrong?

Defc0n1's Crackme Delphi 2.0 by Defc0n1

Download Crackme_Delphi_2.0_by_Defc0n1.zip, 795 kb (password: crackmes.de)
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Crackme Delphi 2.0 by Defc0n1.exe

Is more complex than the 1º version. It have a couple of mathematical operations, and i have add an username too. The username is so simple to see, but the password is more complex.

When you will have the solution, you will see the real files in the CIA computers =P (its a joke, obviuously)

I wish you to enjoy.

Mail me at defc0n1@el-hacker.org

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 15. Jun, 2009
Downloads: 810

Rating

Votes: 5
Crackme is boring crap.

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Solutions

Solution by The So;X, published 03. jul, 2009; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

c0nfig 15. Jun 2009	User: Kevin Password: kevin800 Defc0n1, very bad.
papanyquiL 15. Jun 2009	LOL! Wow............
Anton Troskie 30. Jun 2009	How did you get that password? What breakpoints did u set?
The So;X 30. Jun 2009	@ Anton Troskie set bp @ 0048C984 /. 55 PUSH EBP
The So;X 30. Jun 2009	I dont think this crackme is bad.... its for noob though.. Tx man for uploading this crackme.. btw like "Bush" pics ...thank god he dont know how to crack :)
CesNew 14. Jul 2009	You can see the Name: "Kevin" as unicode and the comparison between your serial and the real one at 0048C9F6, so Breakpoint and you'ññ see in EAX your serial and in ECX the real serial: kevin800 :D
*DNison** 14. Jul 2009	hint Kevin is the only username the crackme will allow the rest is down to your cracking skills

Defsanguje's CrackMe #0 - SerialMe

Download crackme.zip, 33 kb (password: crackmes.de)
Browse contents of crackme.zip

Simply: the goal is to find the hardcoded serial from the executable.

MODERATOR COMMENT: it is possible to edit this file to run in XP also

Difficulty: 3 - Getting harder
Platform: Windows Vista Only
Language: Assembler

Published: 06. May, 2009
Downloads: 611

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Solutions

Solution by cyclops, published 14. may, 2009; download (26 kb), password: crackmes.de or browse.

cyclops has rated this crackme as nothing special.

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Discussion and comments

d(O_o)b 10. May 2009	I dont have Vista, but I think I found the 8 char long serial here: http://img156.imageshack.us/img156/2247/ccm0.jpg DO NOT click the link, if you still want to find the serial by your own ;-)

deibiz_xxl's Learn The First Few Tricks #1

Download LTFFT_1.zip, 6 kb (password: crackmes.de)
Browse contents of LTFFT_1.zip

Thi crackme is intended for people who really starts to crack. If you are an experienced cracker you won't find it interesting at all. I write that because I think that even the beginner-rated crackmes on crackmes.de are too much difficult for someone that is starting. See instructions.txt for more info.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 29. Jun, 2005
Downloads: 2117

Rating

Votes: 7
Crackme is quite nice.

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Solutions

Solution by ReflectiaX, published 01. jul, 2005; download (2 kb), password: crackmes.de or browse.

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Solution by SoN, published 01. jul, 2005; download (6 kb), password: crackmes.de or browse.

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Solution by ap0x, published 01. jul, 2005; download (12 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

JrM- 02. Jul 2005	This is a good program to learn. One word of advice: Try to figure it out on your own for a long time before viewing solutions! The solution guides are great.
Cancel 02. Jul 2005	Don't just find the password either. Find out why that's the password.
deibiz_xxl Author 03. Jul 2005	I agree with Cancel. Finding how the password is generated is another way to learn.
PAPA-- 18. Jul 2005	ty, deibiz_xxl im learning and what a great start for me to feel like im doing something :)
Headbumpa 20. Jul 2005	I'm still new to this all, and kinda need some practice! Go deibiz!
vegito254 03. Aug 2005	nice work deibiz. cool program. but not that hard. am looking for more of you programs ;o)
Reverser 03. Sep 2005	Good job dude, I can't w8 for the next one from you! ^^ keep the good work coder bro :D
HuliGun 11. Jul 2006	I think its pretty CrackMe for newbies
0x4a414154 26. Nov 2014	Thanks deibiz_xxl, I just started reversing crackmes today and it was a good program, I had some experiance with Olly so figured out the password in Olly but patched the file in IDA, later I also tried how to do it in IDA. :)

del86's D31-KeyMe#1 by D31ph3r

Download D31-KeyMe#1.zip, 4 kb (password: crackmes.de)
Browse contents of D31-KeyMe#1.zip

My first simple Crackme for all :-)

1) Make keygen or patch, but the patch should not change more than 10 bytes.
2) No bruteforcing ;)
Crackmes not pack.
Thanks...

D31ph3r

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 04. Dec, 2006
Downloads: 507

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by crack, published 11. dec, 2006; download (14 kb), password: crackmes.de or browse.

crack has rated this crackme as quite nice.

Solution by ty123, published 11. dec, 2006; download (9 kb), password: crackmes.de or browse.

ty123 has rated this crackme as quite nice.

Send a message to del86 »

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Discussion and comments

HMX0101 04. Dec 2006	Hmmm... SMC + Easy serial routine = FUN! Congratulations, this is a nice one ;)
ty123 05. Dec 2006	I would rated as 2 due to SMC + anti-debugging introduced. Nice work!
Mazrock 05. Dec 2006	how disable anti debug ?
HMX0101 05. Dec 2006	It don't have anti-debug... only anti-bruteforcing :P
del86 Author 05. Dec 2006	HMX0101, The elementary check on debugging is present. Look better. Plug-ins for olly well consult =)
Mazrock 05. Dec 2006	when i debug with olly, i don't see any sdr and rdgpacker tells me that checkdebug is present !!!
HMX0101 05. Dec 2006	Maybe i'm confused because after smc some code mantains obfuscated... but anyway i did it and is very easy :P
Ox87k 05. Dec 2006	Sorry but why level2?! @.@'
BaKaE 06. Dec 2006	yes level2 is the right choice newbies, didnt know how to work with thiz self-made-packed crackme but it is a nice one :)
del86 Author 07. Dec 2006	Ox87k, you keygen not correct. Run this crackme without debuger, and enter your serial. It is incorrect =) Excuse for a delay.
Ox87k 08. Dec 2006	woooooooooooooooops! my mistake! i re-sended u a pm with my right kgn+fixed :P
del86 Author 08. Dec 2006	Ox87k, All OK. Thanks. ;-)
del86 Author 12. Dec 2006	crack, ty123, nice solutions, regards.
boof 06. Feb 2007	YEY! i did it :D i love this crackme its great keep up the good work del86/D31ph3r :P

del86's D31-KeyMe #2

Download D31-KM#2.zip, 7 kb (password: crackmes.de)
Browse contents of D31-KM#2.zip

Hi All
Crackme not for newbies
>>> Language: Assembler
>>> Compiler: MASM32
>>> Packer/Protector: No (mini SMC + AntiDebug + Other tricks)
>>> Crypto: Some
>>> Difficulty: 3-4/10 (IMHO)

>>> Rules:
>>> 1) Make a work keygen (it's real), patch is bad, but allow :)
>>> 2) Write Solution and send to http://www.crackmes.de

Thanks

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 23. Jan, 2007
Downloads: 421

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by lithium, published 17. may, 2007; download (35 kb), password: crackmes.de or browse.

lithium has rated this crackme as quite nice.

Send a message to dEmOn999 »

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Discussion and comments

Ox87k 23. Jan 2007	Well, i've some problem with base64. I don't understand why in ur crackme the base64 of 1234567 is "MTIzNG==" while in my keygen it is "MTIzND==". However i rip ur base64 routine and it not works yet, always "MTIzND==". Maybe a little bug? Maybe i'm wrong? Really don't know.. :\|
Crosys 23. Jan 2007	ox, its because the crackme take the name as 4 chars in the base64.. look at the arguments.. crackme looks very easy btw, gonna keygen whole thing later on..
Ox87k 23. Jan 2007	i know that Crosys :) I think the problem is something else..
Guetta 23. Jan 2007	Yep, founded it, it's coz of the four chars of our name are stucked to "i4" string, and the base64 ecnryption of the CME use this "i4" in the encryption, so the last byte before "=" is changed. Little bug. I'm gonna keygen it using the bug.
del86 Author 24. Jan 2007	Yes Crackme is easy, but not for beginners Ox87k good keygen, fast work -) Ox87k: "Maybe a little bug?" - Maybe, maybe ;-) Hm.. I mark this keygenme as "level 3 difficulty"
Guetta 24. Jan 2007	Okay, keygen done, but's it's not a level 4 or 3, I thinks it's a level 2.
Crosys 26. Jan 2007	Agree with Guetta, very ease
red477 27. Jan 2007	@Ox87k : got it. when calculating base64 of the first 4 char of name, the chars immediately after the 4 chars must be exactly the same as in the crackme.
Guetta 27. Jan 2007	red477, I've already said it in my message, the chars immediately after the 4 chars of our name are "i4".
red477 28. Jan 2007	@Guetta: thanks:) got it.

dEmOn999's Crack/Keygen Me!! bY dEmOn999

Download CrackMe_--_by_dEmoN999.zip, 163 kb (password: crackmes.de)
Browse contents of CrackMe_--_by_dEmoN999.zip

Okay..this is my first crack me^^

for newbies^^

written in vb.net2005^^

you can create a keygen if you want..^^

good Luck!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 30. Jul, 2007
Downloads: 1477

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by nAtaS, published 21. aug, 2007; download (213 kb), password: crackmes.de or browse.

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Solution by +YGT, published 05. aug, 2007; download (49 kb), password: crackmes.de or browse.

+YGT has not rated this crackme yet.

Solution by halsten, published 31. jul, 2007; download (52 kb), password: crackmes.de or browse.

halsten has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

dEmOn999 Author 31. Jul 2007	reflector makes vb.net crackme's very easy..^^ i should have used vb6..^^
halsten 31. Jul 2007	Not really, you can make it more harder using vb.net as well , but this is not the issue. Good luck in making a more harder one next time.
halsten 31. Jul 2007	I can also disassemble it using IDA and read the ILASM listing. One can find many solutions to a problem if he thinks well. ;)
saitob 31. Jul 2007	Halsten, how exactley can you make .NET crackmes hard to solve?
MR.HAANDI 31. Jul 2007	just look at the "Xor 2 Zero" keygenme, I think if this would be coded in .net it would be as hard to solve as it is.
dEmOn999 Author 01. Aug 2007	i used vb.net^^ but how can i protect it from reflectors?^^ o.O
saitob 01. Aug 2007	I think you must program some sort of a packer. But I'm not sure...
saitob 02. Aug 2007	Take a look at my Crackme#2 for (maybe) a little treat:)
arobincaron 05. Sep 2007	Used ildasm. It was very easy to get keygen written. You would do well to read Reversing (http://www.amazon.com/Reversing-Secrets-Engineering-Eldad-Eilam/dp/0764574817)
galb 18. Nov 2007	nice one for noobs. Done =)
RedStar 22. Apr 2012	Thanks for this :-D first crackme i keygenned.

demoth's VBCrackMe by Demoth

Download vbcrackme_by_demoth.zip, 6 kb (password: crackmes.de)
Browse contents of vbcrackme_by_demoth.zip

Hello!
This is crackme written in Visual Basic 6.0
This one is not so simple, because it uses the features of VB6, make it difficult to reverse it.

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 22. Jun, 2013
Downloads: 188

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Solutions

Solution by SinaDiR, published 19. may, 2015; download (12 kb), password: crackmes.de or browse.

SinaDiR has rated this crackme as quite nice.

Send a message to Deniskore »

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Discussion and comments

SinaDiR 14. May 2015	Give me a hint about the first part, after getting first char of name asc(firstchar)+1 I can't handle the exception, how should I handle MSVBVM60.__vbaLateIdCallLd ?! did u reverse it ?!
SinaDiR 14. May 2015	Aha, find that !
Sok Info 21. May 2015	Thank you bro......

Deniskore's VM Keygenme

Download keygenme.zip, 1289 kb (password: crackmes.de)
Browse contents of keygenme.zip

Virtual machine keygenme ;)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 20. Oct, 2016
Downloads: 352

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to DerangedMind »

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Discussion and comments

Extreme Coders 22. Oct, 19:13	ExtremeCoders KEY--198759321381065237
RengarSenpai 22. Oct, 20:18	Squaal KEY-4067910837787699 Quite easy to fish the right key out of it, adding string obfuscation on the correct serial and virtualization on the verification loop would make it difficult, you can simply patch one jump and it'll accept every serial.
Taliesin 22. Oct, 22:03	It's even easier than that. In Olly, right click, choose search for Name (label) in current module, set break on all reference to GetDlgItemTextW. Run till 2nd break, then Step over till Key is in EAX.
zairon Moderator 23. Oct, 13:13	3 phished serials, too easy... how about writing a keygen?
Deniskore Author 26. Oct, 19:42	Guys this is keygenme , NOT CRACKME.
EvOlUtIoN 27. Oct, 15:13	Hello, i propose this self-keygen: https://www.sendspace.com/file/rp9gyf
wixmatpro@gmail.com 08. Nov, 06:51	KEY--66140724192590849

DerangedMind's CrackMe #1

Download CrackMe1.zip, 139 kb (password: crackmes.de)
Browse contents of CrackMe1.zip

Made with Dev-C++.

This is my first CrackMe but I didn't label as for beginners because I am a beginner and I have the hardest time cracking it.

Just keygen it (EXTREMELY HARD in my taste) or patch it (still very hard again in my opinion) or serial phish. Just do whatever it takes to get the goodboy message.

Please tell me if I should change the difficulty to higher or lower.
I am new to the cracking game.

This CrackMe has been encrypted in my very own home-made encrypting and decrypting algorithms.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 10. Jan, 2009
Downloads: 428

Rating

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Solutions

Solution by Peroxaide, published 17. jan, 2009; download (280 kb), password: crackmes.de or browse.

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Send a message to deroko »

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Discussion and comments

Zaphod 11. Jan 2009	"Correct password!!!! Please write a tutorial and submit it." It was easy to patch the crackme. I'm not sure about keygenning because the password is non-typable.
foo. 11. Jan 2009	python -c "print '\n'" \| wine CrackMe1.exe _ _ _ _ _ _ _ _ _ _ _ _ / \ / \ / \ / \ / \ / \ / \ / \ / \ / \ / \ / \ ( D \| e \| r \| a \| n \| g \| e \| d \| M \| i \| n \| d ) \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ CrackMe By: DerangedMind Please enter your name:Please enter your password: Correct Password!!!! Please write a tutorial and submit it.
DerangedMind Author 11. Jan 2009	Can you please write a tutorial on how you figured out the password and also how you patched. Because I wrote it and can't figure it out. I'm amazed :)
LeeviON 12. Jan 2009	Could you please gimme the de/encrypting algorythm? Cuz i need these.. :D
Peroxaide 12. Jan 2009	Solution Submitted.. hope it goes through :D
LeeviON 14. Jan 2009	Is the serial hardcoded?

Discussion and comments

born2c0de 29. Oct 2005	Smart coding there. Disassemblers think the Strings are pieces of Code. Nicely masked with MessageBox Functions. Also includes a INT 3 Debug Interrupt instruction. Neat. I got through the main code...i jus hate the math...
deroko Author 29. Oct 2005	that small part of "math" is there so I could sumbit it as crackme. I was more interested in way of tracing code and breaking it down instead of serial calculation which is not hard =)
deroko Author 29. Oct 2005	@bigboss : If you have solved it(which I doubt) please submit solution and don't give hints that I gave at one serbian forum prior to writing this crackme...
bigboss1988 29. Oct 2005	Am sorry deroko :( but i asked only
code_inside 29. Oct 2005	Ok i've cracked it :) The stuff you use in the beginning is almost the same as my TrapMe CrackMe :) (Which sadly only runs on W98SE...) I'll PM the name+serial.
deroko Author 29. Oct 2005	good job mate, algo for "the stuff" you can find on my hp and it works quite good under win2k/xp =)
bigboss1988 30. Oct 2005	Hi deroko i see 2 trick now ;) patch allow for tricks ?
deroko Author 30. Oct 2005	sure you may patch whatever you want to get good key, but don't make jmp to good message as I've expalined in readme.1st.txt =)
bigboss1988 30. Oct 2005	ok deroko i made it ;) i still searching key :)
bigboss1988 31. Oct 2005	Any hint :D i can't get pass
deroko Author 31. Oct 2005	did you find keycheck routine?
bigboss1988 31. Oct 2005	yes, 004010E6 . BF F1204000 MOV EDI,brainbur.004020F1 ; ASCII "bigboss1988" 004010EB . F3:AB REP STOS DWORD PTR ES:[EDI] 004010ED . B9 19000000 MOV ECX,19 004010F2 . BF 55214000 MOV EDI,brainbur.00402155 ; ASCII "1111111111111" 004010F7 . F3:AB REP STOS DWORD PTR ES:[EDI] 004010F9 . 6A 1E PUSH 1E ; /Count = 1E (30.) 004010FB . 68 F1204000 PUSH brainbur.004020F1 ; \|Buffer = brainbur.004020F1 00401100 . 6A 00 PUSH 0 ; \|ControlID = 0 00401102 . FF75 08 PUSH DWORD PTR SS:[EBP+8] ; \|hWnd 00401105 . E8 F4080000 CALL <JMP.&USER32.GetDlgItemTextA> ; \GetDlgItemTextA 0040110A . 85C0 TEST EAX,EAX 0040110C . 0F84 97010000 JE brainbur.004012A9 00401112 . 83F8 05 CMP EAX,5 00401115 . 0F82 8E010000 JB brainbur.004012A9 0040111B . A3 EE214000 MOV DWORD PTR DS:[4021EE],EAX 00401120 . 6A 1E PUSH 1E ; /Count = 1E (30.) 00401122 . 68 55214000 PUSH brainbur.00402155 ; \|Buffer = brainbur.00402155 00401127 . 6A 01 PUSH 1 ; \|ControlID = 1 00401129 . FF75 08 PUSH DWORD PTR SS:[EBP+8] ; \|hWnd 0040112C . E8 CD080000 CALL <JMP.&USER32.GetDlgItemTextA> ; \GetDlgItemTextA 00401131 . 85C0 TEST EAX,EAX 00401133 . 0F84 70010000 JE brainbur.004012A9 ----------------------------->
bigboss1988 31. Oct 2005	00401152 21CA AND EDX,ECX 00401154 BE DF9F204D MOV ESI,4D209FDF 00401159 BE DF9F3216 MOV ESI,16329FDF 0040115E 98 CWDE 0040115F 3216 XOR DL,BYTE PTR DS:[ESI] -------------->process terminated?? that's all
code_inside 31. Oct 2005	bigboss1988, That's not the key checking routine, you're stuck at the second protection (TrapFlag Decryption), pay attention to the SEH that has been set up ;)
bigboss1988 01. Nov 2005	code_inside :( i can't slove it submit ur solution i wanna know something nwe ;)
MaxM 04. Nov 2005	Damn! I reopened the cm in IDA and found the tl.cbk -I TOTALLY forgot to check its presence w/LordPE - I took it very bad when Olly exited at start anyway lol By the way, since I don't want to deal with the uncrypting stuff, is there any way to crack without debugging? Eventually reversing some very curious routine around...
MaxM 04. Nov 2005	sigh! I'll patch and start debuggin to track the ref i miss. (ps: change the t-stuff in txxx in my prev post, to make it more obscure, or just remove it -at will)
deroko Author 04. Nov 2005	that's okay no need to delete post =) happy cracking =)
MaxM 04. Nov 2005	@bigboss: check the prior crackme of deroko, the #2 (august one). It uses the same tecnique of this one, just simplified (btw, you can find a ref to it in the paper on SEH i posted on community, search for the Jr IBM in it)
lord_Phoenix 07. Nov 2005	i solved it =) soon i'll submit a solution..
bigboss1988 11. Nov 2005	thx MaxM lord_Phoenix solved it ;) very nice crackme deroko
lord_Phoenix 11. Nov 2005	very very nice crkme ;)
deroko Author 12. Nov 2005	=) tnx guys I hope that evrybody have learnt what is the purpose of tls callback here and how it works =)
lord_Phoenix 12. Nov 2005	yep tls here is the main thing in protection =)
deroko Author 12. Nov 2005	yap a little knwoledge about debugging is required =) how does olly stop at ep? also you could just erase tls from de in oh =) cheers
lord_Phoenix 12. Nov 2005	most curious thing is ur nanomitez
deroko Author 05. Dec 2005	I've decided to post full src(inc/engines) here it is : hxxp://deroko.headcoders.net/brainbuster/

deroko's deroko's crackme 1

Download crackme.zip, 27 kb (password: crackmes.de)
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objective here is to find key for source files in RAR archive.
progy is not dumpable, it uses simple-metaengine and weird jmp/jcc trough SEH, it is executed on stack.
If you get key please send it to me.

Best regards...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Assembler

Published: 03. Aug, 2005
Downloads: 923

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Solutions

Solution by NoRG, published 04. aug, 2005; download (572 b), password: crackmes.de or browse.

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deroko's deroko's crackme 2

Download crackme.zip, 52 kb (password: crackmes.de)
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find correct key for RAR files, key check routine is protected...
It is not very hard crackme, I hope you will find interesting the way I've protected key-check routine...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Assembler

Published: 04. Aug, 2005
Downloads: 1276

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by warrantyVoider, published 07. aug, 2005; download (83 kb), password: crackmes.de or browse.

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Discussion and comments

warrantyVoider 06. Aug 2005	Great crackme, your SEH-Handler is evil. Also I love the way you hide certain two chars youÂ´re scanning for.
deroko Author 06. Aug 2005	I'm glad you like it =)

deroko's deroko's dump-me

Download dcrackme3.zip, 50 kb (password: crackmes.de)
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I wrote protector today so here is dump-me exe file "protected with it"...

Objective is to dump-file and fix-imports...
Do what ever you want to make it work...
protector is fully written in Asm, but protected app is simple "Hello world" in C...

Progy is tested on XP and win2k, but is should work on other windowses as well...

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Assembler

Published: 15. Aug, 2005
Downloads: 1036

Rating

Votes: 12
Crackme is nothing special.

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Solutions

Solution by ingsoc, published 20. aug, 2005; download (31 kb), password: crackmes.de or browse.

ingsoc has rated this crackme as quite nice.

Solution by jE!, published 20. aug, 2005; download (75 kb), password: crackmes.de or browse.

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Discussion and comments

mr.schyte 15. Aug 2005	A little PE editing never hurts :)
deroko Author 15. Aug 2005	well probably you'll have to fix code section b/c I've used dizzy (hxxp://deroko.headcoders.net/dizzy.zip) to foobar some procedures =)
LuCiFeR 18. Aug 2005	iek, ether it was too easy or i forgot something -.-
deroko Author 18. Aug 2005	if you fixed code section than everything is ok + rebuild import so file will work w/o it's own loader.
ingsoc 18. Aug 2005	Don't be so harsh when judging this crackme. It's pretty fun to do, and can be used as a beginner's intro to commercial protectors. Unpack-mes are often easier than keygen-me type of crackmes are usually require a lot more time to program. Cheers to deroko, my solution tut is almost complete. This crackme was fun and didn't try to bore me with tons of repetitive stuff or unsolvable serial algo. /ingsoc
jE! 18. Aug 2005	i played with it, is funny; as about easy.. but always you can do harder & interestingER.. for example dont use Imprec or other, but try manually restore original Imports, ok!? i will try to write solve...
deroko Author 18. Aug 2005	tnx guys for kind words =) I really appriciate that...
jE! 19. Aug 2005	i submitted my Xsolve, with bunch of bug-reports :))
deroko Author 19. Aug 2005	kewl, I'm looking forward to it... anyway I have improved protector so it doesn't dump, you know what I mean =) and import patching is now even kewler, and everything is managed trough debugger + one anti-debug thread... I'm planing also to put 2 poly engines something like 2 layers of simple encryption =) instead of current one, also some SEHs are removed from this poly =) But anyway I won't subbmit it here b/c it will be really rally HARD crackme and I didn't solve any of HARD ones =)
deroko Author 20. Aug 2005	yap those error with CloseHandle are removed yesterday when I reviewed my source and that tiny SEH is just random generated in poly engine, sometimes there is eax, or any other reg except ebp and esp... great solutions =)

deroko's fishme or keygenme

Download crackme_driver.zip, 22 kb (password: crackmes.de)
Browse contents of crackme_driver.zip

Hello again, this time objective is not so hard, write keygen or just find correct username/serial for your name.

Crackme uses ring0.sys to check password, crackme.exe (user interface) is protected with my "updated" protector, if you are really bored you will reverse this protector and that is pointless b/c all of dirty work is in driver...

Difficulty is 2-3/10 if you have SoftICE, syser or maybe IDA (for static disassembling and analyzing)
8/10 if you don;t have any of these tools

Have fun =)

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Assembler

Published: 08. Sep, 2005
Downloads: 1161

Rating

Votes: 5
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Solutions

Solution by thehyper, published 13. jul, 2006; download (32 kb), password: crackmes.de or browse.

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Discussion and comments

Shism 14. Oct 2005	Doesn't run on my computer
bigboss1988 14. Oct 2005	it's work on SP2 i think it's very very rock :D i ill try to crack it ;)
deroko Author 14. Oct 2005	jB solved it and wrote keygen =) so it is working and it is possible to crack it =)
Shism 14. Oct 2005	ok.. but it doesn't run on my computer.
code_inside 14. Oct 2005	Shism, you're running Win2K isn't it? ;) If an EXE doesn't have an Import Table, it will NOT run on Win2K :)
HMX0101 14. Oct 2005	working on XP SP2
Shism 14. Oct 2005	running win xp sp1
deroko Author 14. Oct 2005	heh, I wrote that protector on winxp sp1 so I don't know what is a problem, did you try to debug it or it won't start at all?
Shism 14. Oct 2005	won't start at all :(
Shism 14. Oct 2005	I think I know what might be the problem...but I'm not sure how to get rid of the protection driver installed on my computer
deroko Author 14. Oct 2005	wait, how driver could be installed if program doesn't work on your machine, I really don't understand... if you somehow terminated process(task mngr for example) and driver is still there just run progy again it will try to Open existing service and it will delete it at the end of crackme, and driver will be unloaded...
Shism 14. Oct 2005	no I have a protection driver on my system... not the program's driver. Main Protty v.01a (test phase) - Process Environment Block protection (currently 2 modules protection used) - Structured Exception Handling protection - Import section killing (currently main application only) - Export section protection (currently 2 modules protection used) - RtlEnterCrticialSection protecting (currently disabled) I have no idea how to uninstall it sigh
deroko Author 14. Oct 2005	heh, easiest way is to use wARK and unload drvier from there, or create small scm manager that will kill it, or delete key from registry and restart machine so it won't start at boot any more =))
Shism 22. Oct 2005	weird damnit I cant load your program... something must be wrong with my computer lol
bigboss1988 24. Oct 2005	when i made bpx loadlibraryA in soft-ice and run crack me to know where's ring0 load ? and where's is je or jne to patch the driver ? show me blue screen said "system protction '!!! and restart!!! i think it's need command for ring0 or sysdebug programme
deroko Author 24. Oct 2005	use :driver ring0 command to see local dispatchers for driver and then you may set bpx on right one =) that's the easiest way to get good key, or use IDA as jB explained in his solution =)
jB_ 24. Oct 2005	Here is my solution (Sep. 11th 2005): http://jardinezchezjb.free.fr/Keygens/deroko-drivercrackme.zip I am sorry, I didn't write a tutorial, that is why i didn't submit it here. I disassembled the driver and removed the garbage code. The cleaned asm listing is in the zip file. Then the serial generation is easy to understand, there is really no difficulty.
bigboss1988 24. Oct 2005	Hi, deroko, i wanna know how do u know this protection had stolen byte? jB, i think ur keyGen have problem !!! userName: bigboss1988 pass: 3521903379-2565468543-2565468543 when i click check (wrong paaword)?!!
deroko Author 24. Oct 2005	what protection? crackme.exe from this crackme? jB's keygen is working b/c it is exact same proc used in driver =)
jB_ 24. Oct 2005	You're right, bigboss1988 I wrote (for the wsprintf parameters) push serial3 push serial3 push serial1 instead of: push serial3 push serial2 push serial1 Not very hard to correct it :) Source updated on my site, thanks.
bigboss1988 25. Oct 2005	hi, deroko, http://crackmes.de/users/arthi/arthiscrackme1.02final/ i saw ur solution very nice u really good in reverse Eng ;) how do u know this crack me have stolen byte? thx man:) jB, ur solution and KeyGen very nice ;) submit ur solution;)
deroko Author 25. Oct 2005	well just compare start of normal VB app and arthis-crackme and that's all =)
bigboss1988 26. Oct 2005	if what the app in C/C++? i saw protection like acprotect and svkp used stolen byte how can i discovering it ? sry man for many question ;)

deroko's pemem

Download crackme.zip, 18 kb (password: crackmes.de)
Browse contents of crackme.zip

keygen, selfekeygen or code loader to get good key.
don't patch good jmpy =)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Assembler

Published: 30. Dec, 2005
Downloads: 1127

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by HMX0101, published 17. jan, 2006; download (49 kb), password: crackmes.de or browse.

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Solution by Zaphod, published 14. jan, 2006; download (200 kb), password: crackmes.de or browse.

Zaphod has rated this crackme as quite nice.

Solution by lord_Phoenix, published 10. jan, 2006; download (36 kb), password: crackmes.de or browse.

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Discussion and comments

konstAnt 02. Jan 2006	Yah I have unpacked the first and then it uses write process memory..... and makes another exe file... I don't know how to dump that need help...
Zaphod 02. Jan 2006	I have found the serial for my name, but I don't think I can write a keygen. You don't need to dump anything - load the crackme in Olly and press F9, click "Name in all modules" and set a breakpoint on GetDlgItemTextA, press "check" in the crackme, click "Execute till return" and F8, F9 a couple of times and you are back in the crackme's new thread. By the way, type a serial with 27 characters, that will make it easier to see what is happening.
deroko Author 02. Jan 2006	@konstAnt: nope there is no writeprocessmemory used here. crackme name is self-explanatory (pe-mem-execution) =) @Zaphod: keygen can be done without a problem because I've intentionaly stored all data needed by keygen into same section that can be dumped without a problem and analyzed in ida (produce asm file), other solution would be to code loader and hook important places in exe to get good key, remeber loader is also one solution and probably the easiest one =)
HMX0101 02. Jan 2006	i'm trying to make a loader for this crackme, but its a little bit harder.
deroko Author 02. Jan 2006	if you need any hints with loader, let me know, loader can be done in, hmmm, maybe 10-15mins when you locate hook places =)
Zaphod 03. Jan 2006	deroko: Unfortunately I don't have ida and I don't know how to "code loader", so I guess I'm stuck :(
Tenshi 03. Jan 2006	the source of the pemem would be intresting i think....never seen an crackme like that....good work i try myself on it ;-)
DeepBlue 03. Jan 2006	It only checks the Serial by doing many operations. It doesnt first generate the correct key and checks it against the key typed in. :( So i have to reverse this shit. I have one question: The Crackme has this loop in it: MOV ECX,20 CLC JB SHORT XXXXXXX SHR EAX,1 LOOPD SHORT XXXXXXXX The JB , jumps to badboy. So we have to survive this loop. But i dont know. Am i right when i say EAX has to be ZERO, to survive this loop?
jB_ 03. Jan 2006	You're right, DeepBlue. Don't be afraid, this routine is really not hard to reverse =)
lord_Phoenix 03. Jan 2006	very nice crackme and very very nice idea as always ;] now i'm in reversing it.. deroko :: u can make extracting "original crackme" as target too =)
DeepBlue 03. Jan 2006	I know now, why loader is better. Does anyone know a good tutorial to write a loader ? I need to read out a specific address in the proccess' area. How do i do it?
deroko Author 03. Jan 2006	Shub-Nigurrath wrote a bunch of them, also there is yates tutorial on coding loaders =) Reading from target process is performed using ReadProcessMemory.
konstAnt 04. Jan 2006	This is the 1st code section of the crackme: 0040D4C5 > E8 00000000 CALL crackme.0040D4CA 0040D4CA 5D POP EBP 0040D4CB 81ED 60164000 SUB EBP,crackme.00401660 0040D4D1 FFB5 FC164000 PUSH DWORD PTR SS:[EBP+4016FC] 0040D4D7 FFB5 F8164000 PUSH DWORD PTR SS:[EBP+4016F8] 0040D4DD E8 8C000000 CALL crackme.0040D56E 0040D4E2 8BB5 EC164000 MOV ESI,DWORD PTR SS:[EBP+4016EC] 0040D4E8 837E 10 00 CMP DWORD PTR DS:[ESI+10],0 0040D4EC 74 62 JE SHORT crackme.0040D550 0040D4EE 8B5E 0C MOV EBX,DWORD PTR DS:[ESI+C] 0040D4F1 039D F0164000 ADD EBX,DWORD PTR SS:[EBP+4016F0] 0040D4F7 53 PUSH EBX 0040D4F8 FF95 D5174000 CALL DWORD PTR SS:[EBP+4017D5] 0040D4FE 8985 00174000 MOV DWORD PTR SS:[EBP+401700],EAX 0040D504 8B7E 10 MOV EDI,DWORD PTR DS:[ESI+10] 0040D507 03BD F0164000 ADD EDI,DWORD PTR SS:[EBP+4016F0] 0040D50D 56 PUSH ESI 0040D50E 8B36 MOV ESI,DWORD PTR DS:[ESI] 0040D510 85F6 TEST ESI,ESI 0040D512 75 04 JNZ SHORT crackme.0040D518 0040D514 8BF7 MOV ESI,EDI 0040D516 EB 06 JMP SHORT crackme.0040D51E 0040D518 03B5 F0164000 ADD ESI,DWORD PTR SS:[EBP+4016F0] 0040D51E AD LODS DWORD PTR DS:[ESI] 0040D51F 85C0 TEST EAX,EAX 0040D521 74 27 JE SHORT crackme.0040D54A 0040D523 A9 00000080 TEST EAX,80000000 0040D528 75 0B JNZ SHORT crackme.0040D535 0040D52A 0385 F0164000 ADD EAX,DWORD PTR SS:[EBP+4016F0] 0040D530 83C0 02 ADD EAX,2 0040D533 EB 05 JMP SHORT crackme.0040D53A 0040D535 25 FFFF0000 AND EAX,0FFFF 0040D53A 50 PUSH EAX 0040D53B FFB5 00174000 PUSH DWORD PTR SS:[EBP+401700] 0040D541 FF95 D9174000 CALL DWORD PTR SS:[EBP+4017D9] 0040D547 AB STOS DWORD PTR ES:[EDI] 0040D548 ^ EB D4 JMP SHORT crackme.0040D51E 0040D54A 5E POP ESI 0040D54B 83C6 14 ADD ESI,14 0040D54E ^ EB 98 JMP SHORT crackme.0040D4E8 0040D550 FFA5 F4164000 JMP DWORD PTR SS:[EBP+4016F4] <---Here is where it jumps to the next part I unpacked and got following result. A new program that ran successfully.. And the code was like this 00401000 > $ BE 6A124000 MOV ESI,unpacked.0040126A 00401005 . 6A 04 PUSH 4 ; /Protect = PAGE_READWRITE 00401007 . 68 00100000 PUSH 1000 ; \|AllocationType = MEM_COMMIT 0040100C . 68 00400000 PUSH 4000 ; \|Size = 4000 (16384.) 00401011 . 6A 00 PUSH 0 ; \|Address = NULL 00401013 . E8 64420000 CALL <JMP.&KERNEL32.VirtualAlloc> ; \VirtualAlloc 00401018 . A3 08604000 MOV DWORD PTR DS:[406008],EAX 0040101D . 8BF8 MOV EDI,EAX 0040101F . B9 00100000 MOV ECX,1000 00401024 . BB DEC0ADDE MOV EBX,DEADC0DE 00401029 . F8 CLC 0040102A . 1BD2 SBB EDX,EDX 0040102C > AD LODS DWORD PTR DS:[ESI] 0040102D . 33C3 XOR EAX,EBX 0040102F . AB STOS DWORD PTR ES:[EDI] 00401030 . 8956 FC MOV DWORD PTR DS:[ESI-4],EDX 00401033 . 81C3 EFBEADDE ADD EBX,DEADBEEF 00401039 . C1C3 07 ROL EBX,7 0040103C .^ E2 EE LOOPD SHORT unpacked.0040102C 0040103E . 8B1D 08604000 MOV EBX,DWORD PTR DS:[406008] 00401044 . 035B 3C ADD EBX,DWORD PTR DS:[EBX+3C] 00401047 . 33C0 XOR EAX,EAX 00401049 . 6A 40 PUSH 40 ; /Protect = PAGE_EXECUTE_READWRITE 0040104B . 68 00100000 PUSH 1000 ; \|AllocationType = MEM_COMMIT 00401050 . FF73 50 PUSH DWORD PTR DS:[EBX+50] ; \|Size 00401053 . 50 PUSH EAX ; \|Address => NULL 00401054 . E8 23420000 CALL <JMP.&KERNEL32.VirtualAlloc> ; \VirtualAlloc 00401059 . A3 0C604000 MOV DWORD PTR DS:[40600C],EAX 0040105E . FF73 50 PUSH DWORD PTR DS:[EBX+50] 00401061 . 8F05 18604000 POP DWORD PTR DS:[406018] 00401067 . 8B4B 54 MOV ECX,DWORD PTR DS:[EBX+54] 0040106A . FC CLD 0040106B . 8B35 08604000 MOV ESI,DWORD PTR DS:[406008] 00401071 . 8B3D 0C604000 MOV EDI,DWORD PTR DS:[40600C] 00401077 . F3:A4 REP MOVS BYTE PTR ES:[EDI],BYTE PTR DS:[ESI] 00401079 . 8B1D 0C604000 MOV EBX,DWORD PTR DS:[40600C] 0040107F . 035B 3C ADD EBX,DWORD PTR DS:[EBX+3C] 00401082 . FF73 28 PUSH DWORD PTR DS:[EBX+28] 00401085 . 8F05 1C604000 POP DWORD PTR DS:[40601C] 0040108B . 0FB74B 06 MOVZX ECX,WORD PTR DS:[EBX+6] 0040108F . 8D83 F8000000 LEA EAX,DWORD PTR DS:[EBX+F8] 00401095 > 8B70 14 MOV ESI,DWORD PTR DS:[EAX+14] 00401098 . 0335 08604000 ADD ESI,DWORD PTR DS:[406008] 0040109E . 8B78 0C MOV EDI,DWORD PTR DS:[EAX+C] 004010A1 . 033D 0C604000 ADD EDI,DWORD PTR DS:[40600C] 004010A7 . 51 PUSH ECX 004010A8 . 8B48 10 MOV ECX,DWORD PTR DS:[EAX+10] 004010AB . F3:A4 REP MOVS BYTE PTR ES:[EDI],BYTE PTR DS:[ESI] 004010AD . 59 POP ECX 004010AE . 83C0 28 ADD EAX,28 004010B1 .^ E2 E2 LOOPD SHORT unpacked.00401095 004010B3 . 68 00400000 PUSH 4000 ; /FreeType = MEM_DECOMMIT 004010B8 . 68 00400000 PUSH 4000 ; \|Size = 4000 (16384.) 004010BD . FF35 08604000 PUSH DWORD PTR DS:[406008] ; \|Address = 003F0000 004010C3 . E8 BA410000 CALL <JMP.&KERNEL32.VirtualFree> ; \VirtualFree 004010C8 . 8BB3 80000000 MOV ESI,DWORD PTR DS:[EBX+80] 004010CE . 85F6 TEST ESI,ESI 004010D0 . 74 6C JE SHORT unpacked.0040113E 004010D2 . 0335 0C604000 ADD ESI,DWORD PTR DS:[40600C] 004010D8 > 837E 0C 00 CMP DWORD PTR DS:[ESI+C],0 004010DC . 74 60 JE SHORT unpacked.0040113E 004010DE . 8B56 0C MOV EDX,DWORD PTR DS:[ESI+C] 004010E1 . 0315 0C604000 ADD EDX,DWORD PTR DS:[40600C] 004010E7 . 52 PUSH EDX ; /FileName 004010E8 . E8 89410000 CALL <JMP.&KERNEL32.LoadLibraryA> ; \LoadLibraryA 004010ED . A3 10604000 MOV DWORD PTR DS:[406010],EAX 004010F2 . 8B7E 10 MOV EDI,DWORD PTR DS:[ESI+10] 004010F5 . 033D 0C604000 ADD EDI,DWORD PTR DS:[40600C] 004010FB . 56 PUSH ESI 004010FC . 833E 00 CMP DWORD PTR DS:[ESI],0 004010FF . 74 0A JE SHORT unpacked.0040110B 00401101 . 8B36 MOV ESI,DWORD PTR DS:[ESI] 00401103 . 0335 0C604000 ADD ESI,DWORD PTR DS:[40600C] 00401109 . EB 02 JMP SHORT unpacked.0040110D 0040110B > 8BF7 MOV ESI,EDI 0040110D > AD LODS DWORD PTR DS:[ESI] 0040110E . 85C0 TEST EAX,EAX 00401110 . 74 26 JE SHORT unpacked.00401138 00401112 . A9 00000080 TEST EAX,80000000 00401117 . 75 0B JNZ SHORT unpacked.00401124 00401119 . 0305 0C604000 ADD EAX,DWORD PTR DS:[40600C] 0040111F . 83C0 02 ADD EAX,2 00401122 . EB 05 JMP SHORT unpacked.00401129 00401124 > 25 FFFF0000 AND EAX,0FFFF 00401129 > 50 PUSH EAX ; /ProcNameOrOrdinal 0040112A . FF35 10604000 PUSH DWORD PTR DS:[406010] ; \|hModule = NULL 00401130 . E8 3B410000 CALL <JMP.&KERNEL32.GetProcAddress> ; \GetProcAddress 00401135 . AB STOS DWORD PTR ES:[EDI] 00401136 .^ EB D5 JMP SHORT unpacked.0040110D 00401138 > 5E POP ESI 00401139 . 83C6 14 ADD ESI,14 0040113C .^ EB 9A JMP SHORT unpacked.004010D8 0040113E > 8BB3 A0000000 MOV ESI,DWORD PTR DS:[EBX+A0] 00401144 . 85F6 TEST ESI,ESI 00401146 . 74 4F JE SHORT unpacked.00401197 00401148 . 0335 0C604000 ADD ESI,DWORD PTR DS:[40600C] 0040114E . A1 0C604000 MOV EAX,DWORD PTR DS:[40600C] 00401153 . 2B43 34 SUB EAX,DWORD PTR DS:[EBX+34] 00401156 . 8BF8 MOV EDI,EAX 00401158 . FF35 0C604000 PUSH DWORD PTR DS:[40600C] 0040115E . 8F43 34 POP DWORD PTR DS:[EBX+34] 00401161 > 833E 00 CMP DWORD PTR DS:[ESI],0 00401164 . 74 31 JE SHORT unpacked.00401197 00401166 . 8B4E 04 MOV ECX,DWORD PTR DS:[ESI+4] 00401169 . 83E9 08 SUB ECX,8 0040116C . D1E9 SHR ECX,1 0040116E . 8B16 MOV EDX,DWORD PTR DS:[ESI] 00401170 . 0315 0C604000 ADD EDX,DWORD PTR DS:[40600C] 00401176 > 0FB7444E 06 MOVZX EAX,WORD PTR DS:[ESI+ECX*2+6] 0040117B . 8BD8 MOV EBX,EAX 0040117D . 81E3 00F00000 AND EBX,0F000 00401183 . 85DB TEST EBX,EBX 00401185 . 74 09 JE SHORT unpacked.00401190 00401187 . 25 FF0F0000 AND EAX,0FFF 0040118C . 03C2 ADD EAX,EDX 0040118E . 0138 ADD DWORD PTR DS:[EAX],EDI 00401190 >^ E2 E4 LOOPD SHORT unpacked.00401176 00401192 . 0376 04 ADD ESI,DWORD PTR DS:[ESI+4] 00401195 .^ EB CA JMP SHORT unpacked.00401161 00401197 > 6A 00 PUSH 0 ; /pModule = NULL 00401199 . E8 CC400000 CALL <JMP.&KERNEL32.GetModuleHandleA> ; \GetModuleHandleA 0040119E . 8BD8 MOV EBX,EAX 004011A0 . 8B1D 0C604000 MOV EBX,DWORD PTR DS:[40600C] 004011A6 . 64:67:A1 3000 MOV EAX,DWORD PTR FS:[30] 004011AB . 8958 08 MOV DWORD PTR DS:[EAX+8],EBX 004011AE . 64:67:8B26 04>MOV ESP,DWORD PTR FS:[4] 004011B4 . E8 0B000000 CALL unpacked.004011C4 ; PUSH ASCII "ExitThread" 004011B9 . 45 78 69 74 5>ASCII "ExitThread",0 004011C4 > E8 09000000 CALL unpacked.004011D2 ; PUSH ASCII "kernel32" 004011C9 . 6B 65 72 6E 6>ASCII "kernel32",0 004011D2 > E8 93400000 CALL <JMP.&KERNEL32.GetModuleHandleA> ; \|\GetModuleHandleA 004011D7 . 50 PUSH EAX ; \|hModule 004011D8 . E8 93400000 CALL <JMP.&KERNEL32.GetProcAddress> ; \GetProcAddress 004011DD . 50 PUSH EAX 004011DE . E8 0C000000 CALL unpacked.004011EF ; PUSH ASCII "ExitProcess" 004011E3 . 45 78 69 74 5>ASCII "ExitProcess",0 004011EF > E8 09000000 CALL unpacked.004011FD ; PUSH ASCII "kernel32" 004011F4 . 6B 65 72 6E 6>ASCII "kernel32",0 004011FD > E8 68400000 CALL <JMP.&KERNEL32.GetModuleHandleA> ; \|\GetModuleHandleA 00401202 . 50 PUSH EAX ; \|hModule 00401203 . E8 68400000 CALL <JMP.&KERNEL32.GetProcAddress> ; \GetProcAddress 00401208 . 8BF0 MOV ESI,EAX 0040120A . A3 24604000 MOV DWORD PTR DS:[406024],EAX 0040120F . E8 04000000 CALL unpacked.00401218 00401214 . 0000 ADD BYTE PTR DS:[EAX],AL 00401216 . 0000 ADD BYTE PTR DS:[EAX],AL 00401218 $ 6A 40 PUSH 40 ; \|NewProtect = PAGE_EXECUTE_READWRITE 0040121A . 68 00100000 PUSH 1000 ; \|Size = 1000 (4096.) 0040121F . 56 PUSH ESI ; \|Address 00401220 . E8 63400000 CALL <JMP.&KERNEL32.VirtualProtect> ; \VirtualProtect 00401225 . BF 31604000 MOV EDI,unpacked.00406031 0040122A . B9 06000000 MOV ECX,6 0040122F . F3:A4 REP MOVS BYTE PTR ES:[EDI],BYTE PTR DS:[ESI] 00401231 . 8B3D 24604000 MOV EDI,DWORD PTR DS:[406024] 00401237 . B0 68 MOV AL,68 00401239 . AA STOS BYTE PTR ES:[EDI] 0040123A . B8 50124000 MOV EAX,unpacked.00401250 0040123F . AB STOS DWORD PTR ES:[EDI] 00401240 . B0 C3 MOV AL,0C3 00401242 . AA STOS BYTE PTR ES:[EDI] 00401243 . A1 1C604000 MOV EAX,DWORD PTR DS:[40601C] 00401248 . 0305 0C604000 ADD EAX,DWORD PTR DS:[40600C] 0040124E . FFE0 JMP EAX <-It is where the program is moving to the real part of the crackme. But EAX value is 9F1000 00401250 . BE 31604000 MOV ESI,unpacked.00406031 00401255 . 8B3D 24604000 MOV EDI,DWORD PTR DS:[406024] 0040125B . B9 06000000 MOV ECX,6 00401260 . FC CLD 00401261 . F3:A4 REP MOVS BYTE PTR ES:[EDI],BYTE PTR DS:[ESI] 00401263 . 6A 00 PUSH 0 ; /ExitCode = 0 00401265 . E8 24400000 CALL <JMP.&KERNEL32.ExitProcess> ; \ExitProcess So it jumps to 009F100 So the code goes: 009F1000 6A 00 PUSH 0 009F1002 E8 66210000 CALL 009F316D ; JMP to kernel32.GetModuleHandleA 009F1007 6A 00 PUSH 0 009F1009 68 22109F00 PUSH 9F1022 009F100E 6A 00 PUSH 0 009F1010 68 E7030000 PUSH 3E7 009F1015 50 PUSH EAX 009F1016 E8 5E210000 CALL 009F3179 ; JMP to USER32.DialogBoxParamA 009F101B 6A 00 PUSH 0 009F101D E8 51210000 CALL 009F3173 ; JMP to kernel32.ExitProcess And many more And the serial calculation section is: 009F114C FF75 08 PUSH DWORD PTR SS:[EBP+8] 009F114F E8 2B200000 CALL 009F317F ; JMP to USER32.GetDlgItemTextA 009F1154 83F8 04 CMP EAX,4 009F1157 0F86 11010000 JBE 009F126E 009F115D A3 EE409F00 MOV DWORD PTR DS:[9F40EE],EAX 009F1162 6A 64 PUSH 64 009F1164 68 8A409F00 PUSH 9F408A 009F1169 6A 01 PUSH 1 009F116B FF75 08 PUSH DWORD PTR SS:[EBP+8] 009F116E E8 0C200000 CALL 009F317F ; JMP to USER32.GetDlgItemTextA 009F1173 85C0 TEST EAX,EAX 009F1175 0F84 F3000000 JE 009F126E 009F117B FF35 EE409F00 PUSH DWORD PTR DS:[9F40EE] 009F1181 68 26409F00 PUSH 9F4026 009F1186 E8 EE000000 CALL 009F1279 009F118B 8BF0 MOV ESI,EAX 009F118D BF 06409F00 MOV EDI,9F4006 009F1192 B9 10000000 MOV ECX,10 009F1197 F3:A4 REP MOVS BYTE PTR ES:[EDI],BYTE PTR DS:[ESI] 009F1199 83C4 08 ADD ESP,8 009F119C 33C0 XOR EAX,EAX 009F119E B9 8A409F00 MOV ECX,9F408A 009F11A3 8841 08 MOV BYTE PTR DS:[ECX+8],AL 009F11A6 8861 11 MOV BYTE PTR DS:[ECX+11],AH 009F11A9 8841 1A MOV BYTE PTR DS:[ECX+1A],AL 009F11AC 51 PUSH ECX 009F11AD E8 720F0000 CALL 009F2124 009F11B2 A3 F2409F00 MOV DWORD PTR DS:[9F40F2],EAX 009F11B7 BE 93409F00 MOV ESI,9F4093 009F11BC 56 PUSH ESI 009F11BD E8 620F0000 CALL 009F2124 009F11C2 C1C0 07 ROL EAX,7 009F11C5 A3 F6409F00 MOV DWORD PTR DS:[9F40F6],EAX 009F11CA BE 9C409F00 MOV ESI,9F409C 009F11CF 56 PUSH ESI 009F11D0 E8 4F0F0000 CALL 009F2124 009F11D5 C1C8 09 ROR EAX,9 009F11D8 A3 FA409F00 MOV DWORD PTR DS:[9F40FA],EAX 009F11DD F8 CLC 009F11DE 1BC9 SBB ECX,ECX 009F11E0 BE 06409F00 MOV ESI,9F4006 009F11E5 BF 6D219F00 MOV EDI,9F216D 009F11EA 0FB606 MOVZX EAX,BYTE PTR DS:[ESI] 009F11ED 8B1C38 MOV EBX,DWORD PTR DS:[EAX+EDI] 009F11F0 0FB646 03 MOVZX EAX,BYTE PTR DS:[ESI+3] 009F11F4 8B1438 MOV EDX,DWORD PTR DS:[EAX+EDI] 009F11F7 33DA XOR EBX,EDX 009F11F9 A1 F2409F00 MOV EAX,DWORD PTR DS:[9F40F2] 009F11FE 33C3 XOR EAX,EBX 009F1200 03C8 ADD ECX,EAX 009F1202 0FB646 04 MOVZX EAX,BYTE PTR DS:[ESI+4] 009F1206 8B1C38 MOV EBX,DWORD PTR DS:[EAX+EDI] 009F1209 0FB646 08 MOVZX EAX,BYTE PTR DS:[ESI+8] 009F120D 8B1438 MOV EDX,DWORD PTR DS:[EAX+EDI] 009F1210 33DA XOR EBX,EDX 009F1212 A1 F6409F00 MOV EAX,DWORD PTR DS:[9F40F6] 009F1217 33C3 XOR EAX,EBX 009F1219 03C8 ADD ECX,EAX 009F121B 0FB646 09 MOVZX EAX,BYTE PTR DS:[ESI+9] 009F121F 8B1C38 MOV EBX,DWORD PTR DS:[EAX+EDI] 009F1222 0FB646 0A MOVZX EAX,BYTE PTR DS:[ESI+A] 009F1226 8B1438 MOV EDX,DWORD PTR DS:[EAX+EDI] 009F1229 33DA XOR EBX,EDX 009F122B A1 FA409F00 MOV EAX,DWORD PTR DS:[9F40FA] 009F1230 33C3 XOR EAX,EBX 009F1232 03C8 ADD ECX,EAX 009F1234 8BC1 MOV EAX,ECX 009F1236 B9 20000000 MOV ECX,20 009F123B F8 CLC 009F123C 72 30 JB SHORT 009F126E 009F123E D1E8 SHR EAX,1 009F1240 ^ E2 FA LOOPD SHORT 009F123C 009F1242 6A 40 PUSH 40 009F1244 E8 07000000 CALL 009F1250 Ok there are three problems with this: 1) I can't unpack now... 2) I don't see any useful calculations 3) I can't find even a valid serial for my name. Will u give an example of username and serial....?????
deroko Author 04. Jan 2006	well look better because there is serial calculation =)
lord_Phoenix 04. Jan 2006	konstAnt :: if u want - i can give u an "extracted version" of crackme..
zairon Moderator 04. Jan 2006	To konstant: Which is the sense of your post? Lots of lines with only a single comment. Next time don't post all that code!
ap0x 04. Jan 2006	You have to spot ROL/ROR instuctions when fishing serial. Look at XOR EAX,EBX and you will see it ;) e.g. user: reversingLabs serial: F5AF77AC-FB284C85-86C382A3
ap0x 11. Jan 2006	since lord_Phoenix did not submit a keygen i give you my loader... http://rapidshare.de/files/10649233/deroko.ph5.solved.rar.html ... But do this yourself it is a very nice exercise.
deroko Author 11. Jan 2006	great job ap0x, that's what I was looking for :D :D
Zaphod 11. Jan 2006	HA! I DID IT!! I wrote earlier that I didn't think I could write a keygen for this crackme, but I was wrong...
lord_Phoenix 11. Jan 2006	congratz =) loader is a very elegant solution..
deroko Author 12. Jan 2006	@Zaphod: c'mon submit it, it would be nice to see working keygen =)
Zaphod 12. Jan 2006	deroko: Can I submit a keygen without a tutorial? OK, I'll try and see if it gets accepted.
DeepBlue 12. Jan 2006	From the FAQ: "We deny all solutions without a detailed tutorial!" Upload it somewhere else.
deroko Author 13. Jan 2006	@Zaphod: if you ask me that's ok =) Write something, how did you get key, what is serial algo etc... I know that it was too much c/p from IDA and lord_Finix didn't write keygen, nor self-keygen nor loader so I'm waiting for your solution =)
HMX0101 13. Jan 2006	my keygen is ready and working, tomorrow: write the solution, maybe can upload the saturday or sunday :)
Zaphod 13. Jan 2006	deroko: I submitted my keygen, but it was rejected. Well, I guess such are the rules. Now I'm not sure I have the energy to write a tutorial, but I'll think about it.
ap0x 13. Jan 2006	Elegant or not it works... You did not published your keygen, nor loader, nor any other thing that can generate serials for this crackme. You solution should have been rejected on site, but i think that there maybe some people that can not fish a serial. Btw. you failed to mantione md5+blowfish... So i don`t see how you could have coded a keygen by missing vital parts of the crackme. But please, bring some light to the subject, post your keygen. Prove us wrong...
deroko Author 15. Jan 2006	@Zaphod: good =) finaly complete solution with keygen =) anyway that procedure that takes forever is md5 you could rip it from IDA because it is offset indipendent, but anyway congratz on converting all this stuff to C =)
Zaphod 15. Jan 2006	deroko: I don't know what md5 is - and by the way, I don't know either what blowfish is ( ap0x mentions this above ). There is a lot to learn...
deroko Author 16. Jan 2006	just some crypto stuff used to make a little bit harder crackme, but as I've mentioned all data needed to create keygen is offset-indipendent and can be ripped from IDA without knowing what is really going on =) cheers =)

deroko's unpackme

Download unpackme.zip, 33 kb (password: crackmes.de)
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pls read readme.txt,
skiled unpackers should consider this as exercise
wanna be unpacker -> good target to practice unpacking and to see what logic is used in some protectors.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: C/C++

Published: 06. Sep, 2006
Downloads: 2235

Rating

Votes: 10
Crackme is good.

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Solutions

Solution by haggar, published 20. sep, 2006; download (31 kb), password: crackmes.de or browse.

haggar has rated this crackme as quite nice.

Solution by kao, published 19. sep, 2006; download (29 kb), password: crackmes.de or browse.

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Discussion and comments

red477 07. Sep 2006	deroko presents, must be nice. I am looking into it and feeling it really great for newbie unpakers like me.
kao 07. Sep 2006	Excellent unpackme. :) Solved in 1 1/2 hours, but I took the hard way. Skilled unpacker probably can do it in less than 1 hour. Deroko, how much details you want in tutorial? Is analysis of loader necessary? Description of junk code?
deroko Author 07. Sep 2006	@kao, write what you did to unpack it =) No need for detailed analyze of loader part, actually my intension was to show some tricks that are used by some comercial protectors with small code and without too many obsfucation. Regards
red477 09. Sep 2006	ha, at last I get a working unpackme too, but it is tooo ugly, coz I patched so much - I patched a little imagined oep into it and luckily it works. Since I dont know how to deal with the destroyed oep and imports properly. Waiting for a good tutorial.
EvOlUtIoN 09. Sep 2006	yes, i'm waiting too...this for me is too difficult
warrantyVoider 09. Sep 2006	Nice one, deroko, this one is full of surprises!
jB_ 09. Sep 2006	Yup it is a really good one. Thanks deroko.
deroko Author 10. Sep 2006	tnx guys, warranty I'm waiting for your next unpackme :)
bpx_ 10. Sep 2006	Nice one deroko, Hope to see more like it soon =)
Maverick 10. Sep 2006	I set a bp on 00401000 (oep) and dumped the file and the memory address (00140000 + 0C000 (size) ). Now I have add a section to the end of the file and added the dumped section (00140000). I redirected the code to make the program take access to my 00140000, not the original 00140000! I runs!!! But how can I rebuild the imports correctly, without using my patched 00140000 (imports) section?
deroko Author 11. Sep 2006	401000 isn't oep...
Maverick 14. Sep 2006	Really? My app runs perfectly and shows your dialog! It makes a redirected call to DialogBoxParamA. I have emulated the redirection (maybe imperfect), but it runs, because I have redirected the addresses 00140000 and 00170000 to my own piece of dumped code and now your app is able to find the required opcodes that are sometimes in 00140000. I find that section everytime with a size of C000 bytes!
deroko Author 14. Sep 2006	yep that's because I'm nice guy :) otherwise imagine that this was delphi app, w/o stolen oep it wouldn't run at all, actually most bcc aps won't run without startup code, but since this is unpackme I avoid usage of borlan libraries, only win32 apis.
Maverick 18. Sep 2006	I got it running, by patching the decryptor and pasting the decrypted section over the encrypted one (00401000)... I don't want to release this file as a solution, because I just patched the file and its import section is not decrypted...
The french beginner 18. Sep 2006	I got it! here is my fixed dump, with IAT reconstruction http://www.mytempdir.com/936275 but I still have a problem. I patch a 'ret' at 4066B4 to avoid a stack problem. and protexted go thru that call perfectly... Where is my mistake? Thx!
Maverick 18. Sep 2006	You can download my unpacked sample for the next 7 days there: http://download/unpackme.zip.yousendit.com/CA6B59792D66538D
deroko Author 19. Sep 2006	Oki let me make this clear to avoid "smart" solutions at main () w/o reconstructed oep. This is Borland compiled app so you have to reconstruct oep because in real life dump at main() won't work. It is easy to reconstruct oep, it is small loader, so it can be analyzed w/o a problem!. So tu sum, none of both dumps isn't reconstructed application. Maybe it will help, downlaod bcc32 it is free, compile one simple hello world and look how oep looks like, then you will know what you are looking for.
haggar 19. Sep 2006	It seams that I'm too late :) My first idea was to reconstruct it with some Borland app, but I see that it has more stolen code. It reminds me a lot to ASPR SKE stolen code. I'll take closer look.
haggar 19. Sep 2006	I solved it but I don't have time for solution now. It is not hard. Stolen code is in this format. - junk - stolen opcode - junk - call to import or to main code Junk can be removed by patching junk_generator, calls can be solved by little changing and then we can just attach whole block to main dump. I have wrote script for olly that can unprotect (stolen + imports) this file. I will try to write solution next week. This is nice unpackme.
deroko Author 19. Sep 2006	nice solution kao yep haggar that is the easiest way to fix it :)
Zaphod 20. Sep 2006	kao writes in his solution that we should run the exe and then dump it. Thereafter we can check the dump with PeId. But PeId just says "Not a valid PE file". Well, I guess I'm more of a complete newbie than I thought, but if someone, perhaps you, deroko?, could clarify things a bit, I would be grateful. Or tell me where I can find some good tutorials on stolen bytes and such things. I have searched with Google but found nothing really useful.
kao 21. Sep 2006	Zaphod, I must apologise for my mistake. RDG packer detector detects "Borland C++ 1999" in freely dumped exe. PeId detects "Borland C++ 1999" when: a) load protexed.exe in PeId b) use generic OEP finder plugin to find OEP c) run and dump EXE d) set proper EP in EXE header. I mis-described necessary steps. Sorry again..
Zaphod 22. Sep 2006	kao, thank you for your answer - well, I haven't been able to find a "Generic OEP Finder"- plugin for PeId, but I have a "Generic Unpacker"- plugin. This plugin says that the OEP is 4080B2. On the other hand, you say in your tutorial that OEP is 401084, so I first tried ( after running and dumping protexted.exe ) to set entrypoint in exe header to 1084. PeId said "Not a valid PE file". Then I set entrypoint to 80B2. Now PeId said "Nothing found*". Then I tried again with 1084 - and this time PeId said "Borland C++ DLL Method 2". You can probably understand that I'm rather confused after this, but again - thanks for trying to explain things to me.
EvOlUtIoN 22. Sep 2006	zaphod, u can also use RDG packer detector instead of PeID, using this tool you avoid any problem and see immediatly that compiler is Borland C++ 1999
Zaphod 22. Sep 2006	EvOlUtIoN, I can't find "RDG packer detector" either. Lots of references to this program, but nowhere to download it. There is a link in ExeTools Forum, but you have to be a member to download from this - then I tried to register as a member, but it was not possible to register anymore. Unless this is just temporary. Well, I'll keep looking, but if you or anyone else know where to find "RDG packer detector" or the "Generic OEP Finder"-plugin for PeId, please let me know :)
l0calh0st 22. Sep 2006	Zaphod look here http://www.rdgsoft.8k.com/
Zaphod 22. Sep 2006	Thank you very much, l0calh0st, that helped, I have RDG Packer Detector now. And it shows the correct results, Borland C++ 1999 and OEP = 401084. Now I just need to understand these "stolen bytes". This might take some time...:)
ricnar456 23. Sep 2006	Is posible determine the stolen bytes, and the oep without use RDG, or any detector, and without know with language are using, only tracing and looking, is obvious OEP is 401084, and the stolen bytes can be reconstructed only tracing and looking when are writed, quit the junk and copy in the correct location, is a tedious work, but for me is more practical than look for start of particular languajes, this can change in other victims, but the method of looking,slow tracing with calm, writing the results, quit the junk, never fail, in any languaje of programation. Is my opinion, maybe is more quick the languaje method. Ricardo Narvaja Ricardo

deroko's x64 unpackme

Download unpackme.zip, 22 kb (password: crackmes.de)
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Simple packer for x64 writen today. Your task is to unpack it :) I've tested it on xp x64 and Vista x64 :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 23. Jun, 2008
Downloads: 522

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Solutions

Solution by TiGa, published 27. jun, 2008; download (1875 kb), password: crackmes.de or browse.

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Discussion and comments

TiGa 23. Jun 2008	I'll be making a video solution for this one myself. ;) I'd really love to see other solutions though.
Bswap 23. Jun 2008	My system is turning on 32 bit :( So it will never start.
deroko Author 24. Jun 2008	@TiGa : I knew you will be the first :P @Bswap : mine too, but I use vmware to run x64 vista and x64 xp. needs hardware virtualization enabled though :(
ultrasnord 24. Jun 2008	@deroko.. how to setting the vmware... i'm noob.. lol..
deroko Author 24. Jun 2008	enable hardware virtualization in BIOS, run vmware, select x64 os (vista or xp) and install it into vmware.
deroko Author 27. Jun 2008	nice one TiGa :)
cobrasniper555 15. Jun 2009	I bought a new computer that runs vista x64 and transfered over all of my tools..including Olly. I can run the program, but I can't open it in Olly (olly runs in x32 only, I suppose?). So what programs do you guys use to adapt?

DeToX's CrackMe.NET

Download Crackme.zip, 30 kb (password: crackmes.de)
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Simple little crackme i made

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 07. Apr, 2011
Downloads: 461

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Solutions

Solution by Nelix, published 28. apr, 2011; download (45 kb), password: crackmes.de or browse.

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Discussion and comments

DOLEM 07. Apr 2011	Nice Header hacks.... :)
DeToX Author 07. Apr 2011	np... ugh try cracking without decompile :)
kao 08. Apr 2011	Wow, you've learned how to use {SmartAssembly}. Great job! How about reading a FAQ: "The only packers/protectors allowed are those that you wrote yourself. This website is not meant to be a place where commercial protectors are disabled for you by other reverse code engineers."?
DOLEM 08. Apr 2011	:) We opened at the first the CM in Fhred, because usually there is some usefull informations in HEX code :) Header was compared with other similiars CMs...
DeToX Author 08. Apr 2011	Only thing smart assembly did was merge the DLL i wrote for Anti-Tampering + encode the strings
Brianpetry 09. Apr 2011	Hey! I dont understand how reverse engineering works, lol I really want to learn I have Ollydbg but am still trying to figure out how to use it
Borgiman 09. Apr 2011	@Brainpetry: I recommend reading some solutions of level 1 crackmes. There is also a very good tutorial made by lena151, take a look at it. http://tuts4you.com/download/Crackme.zip.php?list.17
Brianpetry 09. Apr 2011	thank you @Borgiman It looks very helpful =)
Brianpetry 09. Apr 2011	ok well the main download on the page contains a virus any other safe site? lol
Brianpetry 09. Apr 2011	It was a trojan:win32/trafog!rts
DeToX Author 10. Apr 2011	no one can crack this?
Nelix 11. Apr 2011	Hmm, I always get the message: Your Application has been modified to be cracked or backdoored, it will now exit to protect you!3 but this is the original Assembly, i modified nothing. I think the hash-data one the dopbox are wrong ;)
Nelix 11. Apr 2011	OK, now I've solved it: Login: Detox Password: imtoocool Screenshot xD http://img820.imageshack.us/i/crackmecool.png/ Tut is coming soon...
DeToX Author 23. Apr 2011	no tut? lol i wanna see wat u did so i can patch it and move on lol
TheUnknownProgrammer 14. Sep 2012	I know it's a quite old crackme, but it was an easy one =D Gif: http://www.freeimagehosting.net/ffjwh

detten's crackme11

Download detten_crk11.zip, 36 kb (password: crackmes.de)
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half crackme, half reversme, story based

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 04. Nov, 2001
Downloads: 2539

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Solutions

Solution by zairon, published 04. nov, 2001; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

deurus Author 29. Oct 2010	anyone trying this crackme?
\|CraniX\| 31. Oct 2010	I think somebody is doing some corporate research.
deurus Author 31. Oct 2010	Why do you say?
deurus Author 31. Oct 2010	I just recently discovered world of programming in android and it sounded interesting to work on it. If you want to try ok else ok again
Chorola 16. Sep 2012	1、The serial should be a number,otherwise what you've typed yet would be clear. 2、If the serial is right,will show you 'Crackme01! << by deurus >> - Good boy!',otherwise 'Crackme01! << by deurus >> - Bad boy!'. 3、The serial is ralated to '123456',but what the exactly relation they are,I'm not quite sure.I'll verify it later!
c0otlass 07. Apr 2014	it's done... in some way it was fun
Crackiron 26. Apr 2014	My first Android crackme solved, eskerrik asko!
deurus Author 30. Jul 2014	Solution by J.R. Lambea: http://www.spageek.net/ingenieria-inversa-en-aplicaciones-android/
Luca91 29. Oct 2014	Patched in a couple of minutes, but it was fun anyway, thank you :)
deurus Author 30. Oct 2014	Come con guys. Make a keygen!
d4rK_r3v3rs3R 01. Nov 2014	You mean a keygen like this? http://www.filedropper.com/crackme01keygen
deurus Author 02. Nov 2014	Thanks d4rK_r3v3rs3R!
evaboy 27. Jul 2015	I see where to patch it, but l don't know how to compile it. Any idea will be appreciated.
deurus Author 27. Jul 2015	https://www.mgp25.com/androidCrackme01/

deurus's Android Crackme02

Download Android_Crackme02_by_deurus.zip, 1108 kb (password: crackmes.de)
Browse contents of Android_Crackme02_by_deurus.zip

Rules for the Crackme02 (Android) by deurus
=============================
- Valid solutions are:
- Make keygen + tuto and send to crackmes.de

========================
Tested on HTC Magic with Android 2.2 \
=====================================
[26/10/2010] [Made in the Basque country] [crackmes.de]
=====================================

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Oct, 2010
Downloads: 899

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Solutions

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Discussion and comments

deurus Author 04. Nov 2010	there are some problems disasembling Android Crackme01 and Crackme02. I am reprogramming the projects, sorry.
Chorola 16. Sep 2012	1、The serial should be a number,otherwise what you've typed yet would be clear. 2、If the serial is right,will show you 'Crackme01! << by deurus >> - Good boy!',otherwise 'Crackme01! << by deurus >> - Bad boy!'. 3、The serial is ralated to '123456',but what the exactly relation they are,I'm not quite sure.I'll verify it later!
deurus Author 29. Jul 2014	Solution by mgp25 here: https://mgp25.com/blog/androidCrackme02/

deurus's Android Crackme03

Download Android_Crackmes03_by_deurus.zip, 18 kb (password: crackmes.de)
Browse contents of Android_Crackmes03_by_deurus.zip

Rules for the Crackme03 (Android) by deurus
=============================
- Valid solutions are:
- Make keygen + tuto and send to crackmes.de

Things to consider:
- Because this crackme need some info of phone, not run in emulator.
- Tested on HTC Magic with Android 2.2 but should be run in another android version.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 05. Nov, 2010
Downloads: 3971

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Solutions

Solution by diff, published 23. nov, 2010; download (5 kb), password: crackmes.de or browse.

diff has rated this crackme as quite nice.

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Discussion and comments

deurus Author 06. Nov 2010	this project is made in eclipse and can disamble-asemble easily. I awaiting your response.
Numernia Moderator 07. Nov 2010	Very interesting stuff, thanks!
deurus Author 24. Nov 2010	Good Job diff!! see you in another android crackme ;-)
diff 29. Nov 2010	You definitely will :)
Erix 06. Mar 2012	hi i know it is kind of late (after 2 years!) but the http://www.megaupload.com/?d=DLFNDECR file is not available anymore!
deurus Author 21. Mar 2012	ART(Android Reverse Tools) for newbies and some manuals for begin: http://ul.to/or3kme6t
myomyinthtike 28. Jul 2012	http://www.cyberdevilz.net/f511/how-crack-android-application-game-4866.html
fairy88 18. Aug 2012	oh good and wonderful
raul.jr111 20. Dec 2012	nice. this is nice

deurus's Android Crackme04

Download Android_Crackme#4.zip, 1518 kb (password: crackmes.de)
Browse contents of Android_Crackme#4.zip

- Valid solutions are:
1) Make keygen + cool tuto and send to crackmes.de
2) Patch the splash screen (RESIST!) and Make keygen + cool tuto and send to crackmes.de

About this crackme:
- Size [1,07MB]
- Difficulty: 3/10
- Run in emulator: Yes
- Created with: Eclipse
- Tested on Nexus4 and emulator without any problem.
- Min SDK = 8 or with Android 2.2.

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Jun, 2013
Downloads: 596

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Solutions

Solution by 500 Internal Server Error, published 12. jul, 2013; download (20 kb), password: crackmes.de or browse.

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Discussion and comments

deurus Author 28. Jun 2013	Nobody are trying this crackme???
500 Internal Server Error 30. Jun 2013	I'll try it. Hold on.
500 Internal Server Error 01. Jul 2013	I made the absolute dumbest keygen: I ended up using a patched version of the existing crackme activity to create the key. I'll make a better attempt later, but for now I've submitted my stupid version.
deurus Author 09. Jul 2013	Nothing is stupid.... And less than a victory
deurus Author 31. Aug 2014	Solución de mgp25 en Castellano: https://mgp25.com/androidCrackme04/

deurus's Crackme#01

Download Crackme#01.zip, 193 kb (password: crackmes.de)
Browse contents of Crackme#01.zip

Welcome to the Crackme#01 by deurus
==========================

- Protection: custom and easy algorithm (+,-,*,/,xor,and,mod)
- Is so easy, NO patching alowed.
- Valid solutions are:
- Valid license file + tuto
- Keygen + tuto
(Make what you want and send to crackmes.de)

Example:
Name: deurus Pass: 2108-4219-6300-8368-10449-12520-6

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 01. Aug, 2010
Downloads: 1504

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Solutions

Solution by sir_edmar, published 08. sep, 2010; download (243 kb), password: crackmes.de or browse.

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Solution by Klaria, published 11. aug, 2010; download (307 kb), password: crackmes.de or browse.

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Discussion and comments

TQN 03. Aug 2010	Hi Giotin, your keygen will not work because the year, month, day will change. Deurus used Now and DecodeDate function to get year, month, day value
cyclops Moderator 03. Aug 2010	Please dont post keygen sources in comment section.
deurus Author 04. Aug 2010	Trick: Because the date functions the license key only found for one day
Klaria 05. Aug 2010	Hi, I made a keygen that generates a license.txt (for one day)
Jeon 08. Aug 2010	I have cracked it only with OllyDbg. You have to type in your name and anything as a licence. Now you are in. If you want to get in one more time, you have to delete the licence.txt before you use my exe. This was my first Crackme :-)
Jeon 08. Aug 2010	Oh sorry. You don't have to delete licence.txt
deurus Author 08. Aug 2010	Hi Jeon!! patch not valid
sir_edmar 02. Sep 2010	done. uploaded my solution. sittin on that till 4am this morning ;)
sir_edmar 02. Sep 2010	how can i update my solution? it says its being rejected.
Red_Tulip 02. Oct 2010	Very easy, thanks!

deurus's Crackme#02

Download Crackme#02.zip, 743 kb (password: crackmes.de)
Browse contents of Crackme#02.zip

- Protection: custom crypt+binder and custom algorithm
(because of binder, the antivirus gives false positive, don`t worry)

- The rules are that there are no rules, like in the real LiFe.
- You can patch or make a keygen or...

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Unspecified/other

Published: 22. Jul, 2010
Downloads: 786

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by EvOlUtIoN, published 01. aug, 2010; download (738 kb), password: crackmes.de or browse.

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Solution by mjesun, published 01. aug, 2010; download (2 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

TQN 25. Jul 2010	SHA, MD5 use Crypto API, and a self-write hash function. The real serial which crackme generate will contains some unprintable characters.
deurus Author 25. Jul 2010	Hi TQN!! See this: http://www.garikoitz.info/crack/crackme02_example.jpg http://www.garikoitz.info/crack/Crackme02_keygen.zip (keygen at the moment without sorce, only for check) Keygen is posible but you can make tuto for unpack, patch...
EvOlUtIoN 27. Jul 2010	Yes, true but a crackme should have solution only with letter and numbers, not with maybe unprintable chars, this is out of rules.
deurus Author 27. Jul 2010	It's simple, if you want to solve it, there are alternatives Patch + tuto loader + tuto anything + tuto
EvOlUtIoN 28. Jul 2010	I can do all of three possibilities, what you prefer?
EvOlUtIoN 28. Jul 2010	I done all including keygen, just writing a complete solution.
EvOlUtIoN 28. Jul 2010	Solution submitted...it includes tut, keygen, keygen sources, patched file and unmodified unwrapped file.
deurus Author 28. Jul 2010	Good job EvOlUtIoN!! that's the spirit
deurus Author 29. Jul 2010	Hi EvOlUtIoN!! is really level 4 or you rate diferent?
EvOlUtIoN 29. Jul 2010	I written it in my solution....in my opinion it is a level between 2 and 3. Wrapping is really easy since you can do it without handle P-Code. So the real working main file can be taken in less than 2 minutes. Patch is one of the easiest possible. Keygen needs something but nothing special, the harder part is your personal hash, but with 4 or 5 lines of code it can be solved as well. There is also a bug, if your hash contains a 00, maybe the string of password can result truncated before all characters of name are processed.
Coderess 01. Aug 2010	I'm too solve this, but submission closed.
EvOlUtIoN 01. Aug 2010	I remember that in ordet to run my keygen, .NET Framework 2 (or 3.5 i don't remember) is needed.

deurus's Crackme#03

Download Crackme#03.zip, 274 kb (password: crackmes.de)
Browse contents of Crackme#03.zip

Welcome to the Crackme#03 by deurus
==========================

- Protection: Custom algorithm (so easy, for try with olly)
- Rules: No patch, Make a keygen and send to crackmes.de

Some examples:
Name: deurus Pass: 031924756C
Name: crackmes.de Pass: 2157242344

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 01. Aug, 2010
Downloads: 721

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Solutions

Solution by onepatop, published 16. aug, 2010; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

TQN 03. Aug 2010	A bug in crackme: ESI not initialize.
deurus Author 03. Aug 2010	I text in xp sp3 without any problem.
deurus Author 04. Aug 2010	Somebody have any problem?
slackwarshik 05. Aug 2010	lol, i run it, and with "Name" and "" it write "Good job! Now Make a keygen". If i write some password it don't write "Good job!...".
slackwarshik 05. Aug 2010	i am sorry, this happend one time.
GioTiN 05. Aug 2010	deurus , TQN say right ! ESI have not a value in all places and also not initialize :( plz correct your keygen me ;) Thank you GioTiN
wa7shaimbot 11. Aug 2010	Hey Nice KeyGen AnyOne Can Teach Me little add me asad_gunbound@hotmail.com i need little guide
legendoflegacy 14. Aug 2010	wa7shaimbot u frm Pakistan???

deurus's Crackme#04

Download Crackme#04.zip, 304 kb (password: crackmes.de)
Browse contents of Crackme#04.zip

- Protection: Custom algorithm
- Rules: No patch, Make a keygen and send to crackmes.de

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 19. Nov, 2010
Downloads: 1001

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Solutions

Solution by redoC, published 14. jan, 2011; download (58 kb), password: crackmes.de or browse.

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Discussion and comments

Arkantos 20. Nov 2010	Is There any Check button or something Else.. I don't understand!
deurus Author 20. Nov 2010	arkantos R^RWUc`g 274791092523961096 deurus UQ\h\b 36663070015101
deurus Author 20. Nov 2010	The check don't need anything else, only your data ;-)
Arkantos 21. Nov 2010	now I've found some Code!! Example: name: tamaroth first: eMTWY^e\ second : 41796364927211098 name : tasin first : eMZ_U second : 44604609927211152
deurus Author 23. Nov 2010	Hei Arkantos! waiting a tuto
deurus Author 08. Dec 2010	nobody send a tuto?????????? ;-)
TripleTordo 28. Dec 2010	trankas, barrankas, ojetemoreno, ... lol i´m sure that you watch "Muchachada nui" tv show... lol :P
Narwhal 11. Aug 2014	narwhal _MYmOP] 414002418108153111

deurus's Humanoid ASM KeyGenMe

Download Humanoid.ASM.KeyGenMe.zip, 36 kb (password: crackmes.de)
Browse contents of Humanoid.ASM.KeyGenMe.zip

- Protection: Custom algorithm
- Rules: No patch, Make a keygen and send to crackmes.de

- Some Examples:
crackmes.de
v42dkRF5-1902919167
---------------------------
humanoid
gqhjk6jf-1384029928
---------------------------
deurus
2np4p5-1037938222

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 28. Nov, 2010
Downloads: 1367

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Solutions

Solution by tinmarino, published 19. may, 2015; download (4 kb), password: crackmes.de or browse.

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Solution by draww, published 02. dec, 2010; download (29 kb), password: crackmes.de or browse.

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Discussion and comments

deurus Author 25. Nov 2010	Let's go noobs!! is for your fun ;-)
draww 28. Nov 2010	thanks deurus, solved it. name: draww serial: 242n3-864959441 will make a tut & keygen soon.
elitexp 28. Nov 2010	someone, please post how to make easy keygens... I am learning patching, bt nvr learnt keygenning....... N' self keygenning, I can't figure it out....
draww 28. Nov 2010	@elitexp just follow solved keygenme's on crackmes.de.. you'll find tons of it for sure!
draww 29. Nov 2010	posted two keygens -one is written in VB6 (a bit buggy), the other is in ASM- and a tutorial ;)
TheCake 11. Dec 2010	Thanks for this Keygenme. It was the first Keygen what i've done solo
revme 12. May 2012	I solved it by making a Self-Keygen. Submitted my solution. Hopefully this is acceptable because I spent a long time writing the solution.txt. :)
Rnd0M 09. Jun 2012	thanks bro. it was good. Rnd0M tY2Ah-864889809 maybe ı will make a keygen later
makaka 16. Jun 2012	NAME: alex SERIAL: 2EFF-692003188
Benni1000 19. Oct 2012	Name: Benni1000 Serial: TnkYjHoAo-1556583749
tinmarino 07. May 2015	Nice, I wrote my first keygen cause this crackme is easy to follow but instructive.
tinmarino 07. May 2015	Sorry How do I vote ?
tomkol 08. May 2015	When logged on right side of description is rating. There you can click and rate crackme.
fary 03. Feb, 19:32	Nombre: fary Serial: ajty-691986804

deurus's KeyFileMe#01

Download KeyFileMe#01.zip, 246 kb (password: crackmes.de)
Browse contents of KeyFileMe#01.zip

Welcome to the KeyFileMe#01 by deurus
==========================

- Protection: Custom algorithm
- NO patching alowed.
- Make keygen + tuto and send to crackmes.de

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 22. Jul, 2010
Downloads: 491

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by eshu, published 06. aug, 2010; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

deurus Author 24. Jul 2010	The algo need Bruteforce, a valid solution is serial + tuto enjoy!
deurus Author 24. Jul 2010	Valid serial: 32653457357365686556 ;-)
deurus Author 29. Jul 2010	is anybody there?
slackwarshik 29. Jul 2010	i am here)) what mean "need bruteforce"? how can i bruteforce "key.txt"?
deurus Author 29. Jul 2010	You need to reverse the algo and then bruteforce it for get valid serials. One trick: - The program read the key of key.txt - Do something with key and write hash in the text box
eshu 02. Aug 2010	Another valid serial: 29477782276664055906 (since the other one does not work anymore ;-) Will be making a tutorial and submit soon.
deurus Author 02. Aug 2010	Good Job eshu!!! waiting your solution

deurus's keygenMe#02

Download keygenMe#02.zip, 15 kb (password: crackmes.de)
Browse contents of keygenMe#02.zip

Welcome to the keygenMe#02 by deurus
==========================

- Protection: custom and easy algorithm
- Is so easy, NO patching alowed.
- Make keygen + tuto and send to crackmes.de

Examples:
Check 1 -> Name: deurus Pass: 26664664
Check 2 -> Name: deurus Pass: A-something-B-xxxxxx-C-xxxxxx

Enjoy

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 22. Jul, 2010
Downloads: 1135

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Solutions

Solution by GioTiN, published 26. jul, 2010; download (323 kb), password: crackmes.de or browse.

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Solution by Klaria, published 26. jul, 2010; download (322 kb), password: crackmes.de or browse.

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Discussion and comments

GioTiN 23. Jul 2010	here is source in C : gen(HWND hWnd) { char szname[1024]="",szserial[1024]="",final[1024]=""; long int s1=0,s2=0,s3=0,s4=0; int j=0; char lpname=""; lpname = new char[32]; DWORD len=32; if (GetDlgItemText(hWnd,IDNAME,szname,256)<4) { MessageBox(hWnd,"Name Length Must > 3","hey!",MB_ICONINFORMATION); return 0; } else { for (int i=0;i<(lstrlen(szname)+1);i++) { s1=szname[i]+0x1CB1; _asm{ SHL s1,9} s2+=(s1+(szname[i]-0x40)); } wsprintf(szserial,"%i",s2); SetDlgItemText(hWnd,IDSERIAL,szserial); for (int k=0;k<(lstrlen(szname)+1);k++) { s3+=(szname[1]0x144)+(szname[4]5); } GetUserName(lpname,&len); for (int l=0;l<(lstrlen(lpname)+1);l++) { s4+=((lpname[l]7)+0xF7C5); } wsprintf(final,"A-%s-B-%u-C-%u",lpname,s4,s3); SetDlgItemText(hWnd,IDACTIVE,final); } return 0; } bye
deurus Author 23. Jul 2010	Good Job!! GioTiN Note: a found a bug in my crackme, in check#02 if computer username is greater than 11 chars will always bad boy because to check only take 30 digits Example: A-Administrador-B-897533-C-449085 (33 digits) sorry, I'm clumsy with c++
GioTiN 24. Jul 2010	no problem man! its good keygenme ;) i like it :D dont worry bro :) Bye GioTiN
GioTiN 24. Jul 2010	deurus , I made a tutorial for your nice keygenME#02 and i sent it to crackmes.de moderators to reviewe it ! bye , GioTiN
deurus Author 29. Jul 2010	Good job for all!!! Hi Klaria!! i'm spanish too ;-)
vic4key 22. Aug 2010	Solution by me: http://www.mediafire.com/?4kydqp5tn988p7p
boss756 14. Apr 2012	nice and easy too

deurus's ResolveMe TWO

Download ResolveMe_TWO_-_by_deurus.zip, 56 kb (password: crackmes.de)
Browse contents of ResolveMe_TWO_-_by_deurus.zip

Crackme: ResolveMe TWO
coder: deurus
Languaje: Visual J++
Tested in: Windows XP sp2

This crackme requires the microsoft java virtual machine installed
URL: https://www.alibre.com/alibrelibraries/ftp/JavaVM/9xNT4/msjavx86.exe

RULES
- Make a tuto and a keygen and send to crackmes.de
- No patch
- No self-keygening

enjoy

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 11. Sep, 2009
Downloads: 437

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Solutions

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Discussion and comments

deurus Author 21. Feb, 10:39	Required files updated: http://deurus.info/archivos/mycrackmes/msjavx86.zip
Extreme Coders 21. Feb, 17:04	Resource Editor + Java Decompiler. BTW, there is a bug in your algorithm. You intended to calculate the sum of all chars in the name, but instead calculated the product of the first character and string length. int j = 0; for (int n = 0; n < m; n++) k += str1.charAt(j); should be for (int n = 0; n < m; n++) k += str1.charAt(n);
deurus Author 23. Feb, 17:22	It is a bug or intentional? Please, make a keygen for the community.
deurus Author 23. Feb, 17:43	Example: deurus 61037-othervalue-54255
Extreme Coders 23. Feb, 18:54	Okay. Here you go. https://gist.github.com/extremecoders-re/a8d90cea12a7e6ff4d12

deurus's Utopia keygenme 01

Download Utopia_keygenme_01.zip, 7 kb (password: crackmes.de)
Browse contents of Utopia_keygenme_01.zip

Make a keygen!!

You have 2 levels to resolve; 1/10 and 2/10

enjoy!!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 03. Aug, 2009
Downloads: 395

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Solutions

Solution by MACH4, published 23. aug, 2009; download (47 kb), password: crackmes.de or browse.

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Discussion and comments

Vallani 06. Aug 2009	Hello deurus, I tried your keygenme few days ago but I failed with the second part, because I don't know the meanings of these p-code instructions and don't find a reference or something like this. Can you maybe provide such reference or give a hint where I could get it? Greetings Vallani
deurus Author 07. Aug 2009	Hi vallani!! Here you have a debugger for vb p-code: http://www.woodmann.com/collaborative/tools/images/Bin_Whiskey_Kon_Tequilla_VB_P-Code_Debugger_2007-12-28_8.57_WKTDBG13e.zip A little about p-code: http://www.brainbell.com/tutors/Visual_Basic/A_Little_About_P_Code.htm P-code opcode database: http://vb-decompiler.com/pcode/opcodes.php?t=1 I hope you worth
d(O_o)b 16. Aug 2009	Easy. Took me less than five minutes to register it: http://img26.imageshack.us/img26/4492/ukd.jpg I'll leave the keygen writing to someone else ;-)
deurus Author 22. Aug 2009	Hi Mach4!! good job with the keygen but in the second stage, if i change the username the serial don't update, you can put a tipically generate button or implement the textbox.change() function. But Good job!
MACH4 22. Aug 2009	Hi deurus, I used the existing UserName for simplicity, but no prob, Just uploaded an extra version using yor prefered method! MACH4
MACH4 22. Aug 2009	so you get two now for the price of one AH SAID YOU GET TWO NOW FOR THE PRICE OF ONE!!!! Ignore me (English joke!) MACH4
deurus Author 23. Aug 2009	Thank's for the new keygen and now I GET TWO FOR THE PRICE OF ONE!!!! Great

deurus's Utopia ResolveMe 02

Download Utopia_ResolveMe_02.zip, 255 kb (password: crackmes.de)
Browse contents of Utopia_ResolveMe_02.zip

- The CrackMe have 2 levels to resolve. (03/10) and (04/10)

- It's a different crackme, NO name, NO serial, only sliders and checkbox

- Use any tools what you want

- No patching please!!

- You must discover the correct combination; only one serial works.

enjoy

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 16. Aug, 2009
Downloads: 515

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Solutions

Solution by MACH4, published 21. aug, 2009; download (2 kb), password: crackmes.de or browse.

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Solution by bytos, published 21. aug, 2009; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

deurus Author 17. Aug 2009	No post here the solution!! Make a tutorial and Submit your solution » to crackmes.de
Xspider 19. Aug 2009	dude it's p-code
deurus Author 21. Aug 2009	Hi!! Here you have a debugger for vb p-code: http://www.woodmann.com/collaborative/tools/images/Bin_Whiskey_Kon_Tequilla_VB_P-Code_Debugger_2007-12-28_8.57_WKTDBG13e.zip A little about p-code: http://www.brainbell.com/tutors/Visual_Basic/A_Little_About_P_Code.htm P-code opcode database: http://vb-decompiler.com/pcode/opcodes.php?t=1 enjoy!
obnoxious 21. Aug 2009	@mach4 gud to see you around :)
MACH4 21. Aug 2009	Hi obnoxious, Good to see you too! Need to keep my hand in occasionally! Too many other interests! MACH4

devast8a's Something I wrote for a friend

Download Crackme.zip, 34 kb (password: crackmes.de)
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I wrote this one night for a friend, He was testing out his cracking skills, He was unable to crack it. I recently found this site and decided I would post here. Anyway on to the crackme.

Quite a simple program, Once run it asks for a password should you enter the correct one a message is displayed "Congrats you have got the password"

-- Rules --
None, Use whatever to get the password

I'm happy to release source once cracked
I have no cracking knowledge what so ever so the rating was a guess on my part and is most likely incorrect.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 23. Dec, 2008
Downloads: 968

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by alicemcline, published 27. dec, 2008; download (1347 kb), password: crackmes.de or browse.

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Solution by ghandi2006, published 27. dec, 2008; download (872 b), password: crackmes.de or browse.

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Solution by _HellDashX_, published 27. dec, 2008; download (1010 b), password: crackmes.de or browse.

_HellDashX_ has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

_HellDashX_ 23. Dec 2008	You only need 5s to resolve it, :) Very easy
synak 23. Dec 2008	well, then what WILL result in the karate training?!@ :)
LeeviON 24. Dec 2008	_HellDashX: Why didn't you post a solution if it was so easy? PS: I have been making a "real" keygenme, that generates the key by using a simple algorythm, so you should make a program that generates the serial using the same algo. Oops, i exposed already too much..
_HellDashX_ 25. Dec 2008	LeeviON: Because if i put the key here...what is the point to the solutions and this site?
Otzku 28. Dec 2008	Yay. First non-patched crackme that I did and it took less than 20 seconds!
GordonBM 29. Dec 2008	Yeah, it's easy and I'm still waiting or my solution to be accepted...
raisdead 31. Dec 2008	yearg... I did it.... if 1 was the easiest then this has a difficulty of 1.000001
Sashx41 15. Jan 2009	Yep, really very easy :)
MulleDK13 27. Jan 2009	I'll write a video tut xD (write, lol)
MulleDK13 27. Jan 2009	nvm... submission closed <.<
unon 06. Aug 2015	Stack SS:[010EFA20]=003018F8 (Crackme.003018F8) ECX=010EFA7C, (ASCII "xxx xxx xxx xxx training xxx") :D

DevAstatoR's What do I want?

Download MyCrackIt.zip, 1 kb (password: crackmes.de)
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very easy crackit that i warot for bright-shadows.net. it was rejected maybecuz its too easy.
it you get the 2 passes right it will outout some vitomin/minearal. jummy :D.
just think of what the crackit wants to do.
It's very small... all garbage removed... :D I hope...

As its my very first crackit any comments are welcome....

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 17. Sep, 2004
Downloads: 2831

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by aldeid, published 10. dec, 2015; download (129 kb), password: crackmes.de or browse.

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Solution by Plasmator, published 20. sep, 2004; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

Anakin 21. Apr 2013	Why nobody has commented yet?! The crackme was fun! ;) Thank you DevAstatoR!
jenkinspro 25. Jul 2013	WOW man!! its awesome!! i didnt know that i should make it :"WM_GETTEXT" so i break the brain for 3-4 hours didnt know what to do!!!finally i gave up and saw the solution!! its so cool!!! to ** my mind with "WM_GETTEXT" and after this "hash string" very cool!!! i realy like it!!!:))))
whitehat.panda 05. Feb 2015	Nice crackme bro! It' so funny, enjoy cracking :)
aldeid 05. Dec 2015	My solution posted here: https://www.aldeid.com/wiki/Solution-DevAstatoR-What-do-I-want
Thathater 20. Apr, 21:18	Awesome crackme for beginners, enjoyed.

devilz's KeyGen-me N°1 by devilz

Download keygen_me1.zip, 4 kb (password: crackmes.de)
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Little keygen-me

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Mar, 2003
Downloads: 2084

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by _RiPTiDE_, published 23. mar, 2003; download (4 kb), password: crackmes.de or browse.

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Solution by scarabee, published 20. mar, 2003; download (4 kb), password: crackmes.de or browse.

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Solution by harlequin, published 20. mar, 2003; download (571 b), password: crackmes.de or browse.

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Discussion and comments

devilz's Keygen-me N°2 by devilz

Download keygen_me2.zip, 7 kb (password: crackmes.de)
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Another keygen-me

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 03. Apr, 2003
Downloads: 2156

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by m@rio_crk, published 20. apr, 2003; download (5 kb), password: crackmes.de or browse.

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Solution by _RiPTiDE_, published 12. apr, 2003; download (27 kb), password: crackmes.de or browse.

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Solution by mangotrout, published 06. apr, 2003; download (9 kb), password: crackmes.de or browse.

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Solution by harlequin, published 05. apr, 2003; download (826 b), password: crackmes.de or browse.

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Solution by devilz, published 05. apr, 2003; download (5 kb), password: crackmes.de or browse.

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Solution by ceep, published 04. apr, 2003; download (5 kb), password: crackmes.de or browse.

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Solution by human_thought, published 04. apr, 2003; download (6 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

XxLXDxX 29. Oct 2010	very good for starters :)
r-Evolution 31. Oct 2010	C' est un keygen-me tres facile!!!C'est tres amusant.Merci beaucoup!!! :P Thanks btw you made me remember my french!!!!

devilz's Learn Keygening

Download conc3.zip, 26 kb (password: crackmes.de)
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Learn Keygening

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 04. Aug, 2003
Downloads: 1944

Rating

Waiting for at least 3 votes
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Solutions

Solution by CuTedEvil, published 06. aug, 2003; download (27 kb), password: crackmes.de or browse.

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Discussion and comments

Devoney's CrackMe 2.0; Find the secret text

Download CrackMe2.zip, 1 kb (password: crackmes.de)
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Hi All,
This is a CrackMe which requires a password to reveal/show/get the secret text. The password you fill in undergoes an algo, the outcome of the algo determines if the program will give you the right secret text.
If you think you have found the right secret text, fil it in the following site to check if you are right: http://members.lycos.nl/wietsite/fp.php Fill in you secret as fp.php?x=secret_text The php script will say to you if you have the correct text or not....

NO RULES FOR THIS CRACKME, do what you want.

Goodluck and send me your solution to x2barchain2x@hotmail.com.
Grtz Devoney

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 03. Feb, 2007
Downloads: 829

Rating

Votes: 7
Crackme is nothing special.

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Solutions

Solution by Sunshine, published 10. feb, 2007; download (6 kb), password: crackmes.de or browse.

Sunshine has rated this crackme as quite nice.

Solution by Zaphod, published 10. feb, 2007; download (2 kb), password: crackmes.de or browse.

Zaphod has rated this crackme as quite nice.

Solution by Kostya, published 10. feb, 2007; download (54 kb), password: crackmes.de or browse.

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Discussion and comments

profdracula 03. Feb 2007	Its simple if u know how a call to MessageBoxA works :)
Kostya 03. Feb 2007	Solved.. Goood! :) I like it.. :) Easy one :) but cool 8)
Devoney Author 03. Feb 2007	HI you crackers who have finished this CrackMe. If you do have notes about how you managed to crack it I really like to see them. Please mail them to me at x2barchain2x@hotmail.com Grtz Devoney, and thanks for trying and liking my CrackMe ;)
mindless 03. Feb 2007	solved! I had real fun with this crackme, you are a ??Crack?? ;-)! If i have time i will post a tutorial, anyway I am sending you my notes asap. Daniel
Devoney Author 04. Feb 2007	Thanks for mailing!
Zaphod 07. Feb 2007	Devoney, I found out what to type and it works with the crackme, but on the lycos website it says that my secret word is wrong. Vhy??
Zaphod 07. Feb 2007	Ooops - I just discovered that I should type the secret word instead of secret_text, not after. I don't feel sleepy, but I guess I must be...:) Everything is okay, I got the thumbs-up from the website.
Devoney Author 10. Feb 2007	Nice comment ;) It costed me a lot of time to calculate all the bytes needed to be written. But I was quiete tired at that moment, that did play a role to I think.... I want to make a CrackMe kinda like this one with a lot of code depending on the user input... But it costs a lot of time, maybe I could make a simple app to do all the calculating for me :P
profdracula 11. Feb 2007	Hi Devoney, if you want to make another crackme based on same logic, then here are some ideas; 1. Code complete app (with wanted code as well) 2. Extract these bytes using Table Extractor 1.34 by Thigo 3. Fill these bytes with NOP/junk in app. 4. Use some algo e.g. MD5 etc.(an algo that's reversible) to get required user-input. 5. If you want code-to-be-devrived to be big, you can use MD5-per-byte etc(there can be millions of ideas). 6. BUT: if your algo required-bytes are big-in-quantity, then you'll have to provide user MORE AND CLEAR hints as well.
fuex 15. Feb 2007	:) Thanks for this crackme. It was the first one I ever tried and I managed to solve it. What a nice feeling!
Devoney Author 02. Nov 2007	Is this one to simple for you? Try my 3th crackme called "CrackMe 3.0" by Devoney, it is based on the same principle. thanks for appreciating this one!

Devoney's CrackMe 3.0

Download crack3.zip, 7 kb (password: crackmes.de)
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Intro: 
The FBI has intercepted a program which contains important information. The program needs a code to give the information free, but the FBI and CIA are clueless and has asked you, as a professional cracker, to get the information from the program.
 
The Story of the FBI: 
A Russian maffia group who call them selfs Brevihock are planning an attack on the american ambasy in Berlin (Germany). Atleast that is what the cought suspect says. He says it has something to do with a recently researched technology in a Russian laboratory about radio-active radiation. This is all the suspect swears to know. He does not know when the attack is going to take place. The Russian goverment is clueless too because all of the research institutes have to report their foundings to the goverment. Nothing of this has been reported and the Russian police is drowning in the loads of paperwork to go through, seeing if they can find any of this back in the research documents taken from the laboratories.
 
The FBI can not get their hands on the documents because Russia wont cooperate. The FBI has managed to crack the email of the suspect though. This resulted in some information about corrupted professors ont he payroll in Russia and the role of the suspect in this case. The suspect needed to provide some goods to the laboratory so they can finish the weapon.
 
In one of the emails there was an applications (windows based) which should contain the exact location of the laboratie. The applications needs somekind of code. How hard the FBI tries, the suspect claims to have forgotten the code.... We know that is not the truth but mor he wont spit.
 
Assignment: 
Crack the application and find the exact location!
 

** Tested on Windows Xp and Vista ** 
Mail me if you have problems, want tips! 
Also mail me if have managed to get the location. 
If you have found the location and looked it up, you will know if it is right or not.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 17. Nov, 2007
Downloads: 894

Rating

Votes: 4
Crackme is good.

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Solutions

Solution by _ninar1_, published 02. dec, 2007; download (1318 kb), password: crackmes.de or browse.

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Discussion and comments

z01b 04. Nov 2007	\Windows\ApiPort
Devoney Author 04. Nov 2007	What do you mean by windows apiport? I did not use other peoples software. If that is what you mean.
z01b 05. Nov 2007	is the location:)
DigitalAcid 05. Nov 2007	I seem to be stuck in an infinite loop :(.
DigitalAcid 05. Nov 2007	Interesting crackme, but i'm not good enough yet to solve it (I see the start and the finish but not the route in between, or at least not the right one). Can't wait to see a solution for this.
Devoney Author 06. Nov 2007	Reply to DigitalAcid: Can not wait for a solution for it either. There really is no infinite loop that I know of... You could have created it by yourself, a little piece of the program is self modifying. Reply to z01b: No the location is not ")" without quotes. (Only one universal location format would be logical... <- thats a hint)
DigitalAcid 06. Nov 2007	Yes, i created the loop, but that's because i wanted to skip the "No security code found" message. It happens because it keeps checking if AL == CC and it does... It seems we have to put some opcodes in the crackme (wich are also used in the algo =) ), but i have no idea wich ones. Then it'll do some encrypting on a text wich should then be the solution or so :\|.
Devoney Author 06. Nov 2007	You are dealing with the program in the wrong way... You have found one of the secutiy checkpoints.... Now you have to deal with it ;) and I am not going to spoil the idea of the loop you just mentioned. Goodluck P.s. There are no rules to crack this one. Patch all you want and even bruteforce the app if you want... (which is possible.. but watch out for the nasty debug/patch trick ;) )
Devoney Author 11. Nov 2007	Still no one came up with a solution? Guess this one is quiete hard then. Though the algorythm isnt that long...
red477 13. Nov 2007	Devoney, hello, the story is good, but the crackme is not, I think. You leave tooo much unknown code and data for us to GUESS. I said GUESS because I don't think there is a way out in the crackme by deduction. As it to bruteforce(it is just another way to guess) and patch, I can not find an aesthetic way for it either:(
red477 13. Nov 2007	Devoney, sorry for my complaints. In fact I am just asking for more clues;) Maybe I should do this in private. I am still working on it, anyway.
Devoney Author 13. Nov 2007	Here are some clues: 1. I have used 2 ways to execute functions, just to confuse the cracker. 2. The bytes created on runtime, and written near the Entry Point are based on a very small algo which uses your security code. Check out the second way the program executes functions, that should help. 3. The way you have to put in the security code is quiete easy. once you have found out how, you must known that OllyDbg has a little issue with the returned data of the function that reads the security code.(maybe other debuggers to, but that I dont know). It was quiete a struggle for me to code it, by accident it has become an anti-debugging option, but it was not the purpose. You can check this problem out quiete easy. Tip: Once you have the correct password and execute the program in the debugger, it still will raise an exception error, or a "Don't send" error in Windows. 4. Patching is not always an option since the "location message" is based on bytes in the program. You really must know what to patch... (see hint 3). Is this better ;) ? Hopefully, If you need more then just post a little comment. If you want to discuss things which you already found out, then PM me!
Devoney Author 13. Nov 2007	Oh yeah, just to spare you stubborn guys a hard time. There is one "bug"/ design problem". DONT RENAME THE PROGRAMM. (If you check out why then this is an additional hint for hint 3 in the previous message) Another hint: the story is about an EXACT location.. It would be logical if this location was in a universal format so everybody could look it up easily... ;) This one is supposed to be hard, but I did not know how hard it is for experienced reversers to finish this one. I have spend approx. 40-50 hours on creating the idea, programming and testing the app.
Zaphod 13. Nov 2007	I just don't get it! At some point I come to this line: mov dl, byte ptr ss:[ecx+eax] At this moment ecx = 0, eax = 401067 Then I would expect dl to get the value of byte ptr[ecx+eax], that is, byte ptr[401067] after execution of the command. A few lines above I can see that the content of 401067 is 90h ( nop ) Never the less dl = CC when that line is executed. How is that possible? what IS it with that ss before [ecx+eax]? If this is part of the nasty debug/patch trick, it really is nasty :)
merker 14. Nov 2007	Nothing readable matches with "SUB EBX, 3EB63F3B". Or is it a very, very, very wrong way to solve it ?
Devoney Author 14. Nov 2007	To merker: This is not the way to deal with it.... You could try though. But it is about an exact location... Not like there is any readable understandable message you could guess. If you have created readables matches a 0 could also be a 12,3,4, or 5 or a B could easily be a C or D. To Zaphod: You should first discover what CC is about. And Why is 401067 90h (NOP), probably because you patched the code. Patching is tricky with this crackme though... The location is based on bytes in the program. So if you patch a wrong byte which is needed for the location then you still have no solution. Goodluck to you all, any problems then let me hear it.
Zaphod 14. Nov 2007	Devoney, I know what CC is about - and I haven't patched anything, at least not in the version I'm working with right now. So I feel rather mystifyed...
__imp__ 14. Nov 2007	@Zaphod: Obviously, you placed some breakpoints and that's why you see CC where it shouldn't be. Anyway, this procedure does nothing except for antidebug.
Zaphod 14. Nov 2007	@__imp__: Nope - no breakpoints at all! But I'll explain exactly another thing that mystifies me. In the hope that someone can explain what is wrong. Just to be absolutely sure I downloaded a new and fresh version of crack3, loaded it in Olly and started stepping F8. When I arrived at "0040102D JGE SHORT crack3.00401047" I changed the sign flag from 1 to 0 to make sure the jump was taken. Pressed F8 to jump, changed the sign flag back to 1 just to be absolutely safe - and went on stepping F8. When I got to "00401062 CALL crack3.0040121C" I tried executing this call in two different ways: 1. F8 to step over the call. This resulted in an exception. 2. F7 to step into the call. Then ctrl-F7 to animate through most of the loop ( 155h bytes ). Stopped with F12 when the loop was almost done and finished manually. This way the call was executed without exceptions. I just don't understand how this can be! Help :)
__imp__ 14. Nov 2007	Yes, it happens exactly as you described (and in IDA too). It looks like some area after 401005 is overwritten, but this can't happen. I have no explanation :( Any ideas?
DigitalAcid 14. Nov 2007	Why can it not happen ? When the loop hits the return, it goes back where it got called from (after the call) wich leads to some algo to modify the code... 99.9% of the time the self-modifying code will be wrong, because the input is wrong (aka the security code).
_ninar1_ 14. Nov 2007	99.9% of the time the self-modifying code will be wrong. and 0.001 % it works :D i got that right self-modified code when i have time tomorrow i will do the last view on it :D
Zaphod 14. Nov 2007	I think I MAY have found an explanation. It seems that Olly sets a one-shot breakpoint at the line after a call. And removes it immediately after the call have finished. Just some internal Olly-mechanism, as far as I can see. Normally this doesn't matter, but the call to 40121C checks for breakpoints!
jE! 16. Nov 2007	helllo, froinde! i discovered that code snippet, wich is written at 401005h.. wait little, if i discover other things.. or cooperate than..
Devoney Author 16. Nov 2007	Nice that you have found what needs to written. Do you understand where it is based on?
jE! 16. Nov 2007	no, not uderstood.. but i nothing get on string for msgbox.. can't get clean inglich string..:(
DigitalAcid 17. Nov 2007	Yeah, the self modifying code at 401005 is based on ESI, wich is the sum of every character in the security code... Btw, if we are allowed to patch, we can jump to the goodboy, but then again, we didn't find the security code =).
Devoney Author 17. Nov 2007	You may do what you want. Your virtual mission is to obtain the correct/exact location where the goods should be delivered. You can jump to the goodboy message but you skip alot of code where the message depends on.
jE! 17. Nov 2007	can be "Krasnoiarsk" location?
Devoney Author 17. Nov 2007	Can you send the FBI or CIA to krasnoiarsk?
jE! 17. Nov 2007	before i need to write TUT_paper for them! oh, monei-monei! so, IS location correct & CAN i start writting tut!?
Devoney Author 17. Nov 2007	Is that the text you get? No it is not right. The FBI has fired you. It costed alot of money, time and manpower to initiate the operation. All for nothing. More importantly, it has gain publicity and it is now known worldwide what the FBi was doing there. All the terrorists have probably fled by now....
Devoney Author 17. Nov 2007	Bloody Hell I discovered a bug... My apologies... This should be changed: 004012EE . 81EB FDF57807 SUB EBX,778F5FD to 004012EE . 81EB FFF67807 SUB EBX,778F6FF Consequences: No major consequences. What you were trying to reverse will not be changed. Only 2 characters in the final message were changed by this... (Could be a hint) I Will post a new executable. Sorry for the inconvienence. Again, if you would have already cracked to the final message then you would know you did right... I designed it the way it was supposed to be... but I did not used the right calculation.. I am ashamed
TiGa 17. Nov 2007	Crackme updated with the new version.
jE! 18. Nov 2007	by invisible inteNational crackme rules, STRINGs (msgbox captions, command lines) must be ANSI bytes.. (ODh,OAh can be for msgbox strings..). i think, you break this rule. Is it TRUE? for example, use of that corrected dword: mov [403020], ebx sub ebx, 0778F6FFh mov [40301C], ebx 1 from 8 char will NOT be ANSI, yeEE?? about 'sub ebx, 3EB63F3Bh' already warned.
Devoney Author 18. Nov 2007	yeah could be. Just needed to complete te text, it contains not only alphabetic characters... Did not know of that rule. Sorry if I broke that rule... www.asciitable.com provided me with the data ;)
jE! 18. Nov 2007	ok, look here.. at least are those command-line first 8 chars ANSI? or what..
merker 18. Nov 2007	I assume the crackme is unsolvable because the message may contain chars in its full range from 00h to FFh. This means that every solution could be the one and only solution because a test of 'readability' will always fail.
_ninar1_ 19. Nov 2007	chars in its full range from 00h to FFh. yep thats true i just wrote a bruter for the range of 00h to 7Ah but no good message so seams not makeable
Devoney Author 19. Nov 2007	The security code is nine characters long and eight characters contain numbers from 0 to 9 and characters from a to z. One character of the security code needs to be 2d in hex. So your bruter is not coded right otherwise it would have worked. There is 1000ms of Sleep in the program. What did you do with it when you bruteforced the program? Did you patch the code concerning the Sleep function?
_ninar1_ 19. Nov 2007	its not about the security code if the message of the MessageBox has chars-wide between 00h to FFh its not solvable
Devoney Author 19. Nov 2007	Is www.asciitable.com not a good reference for choosing chars? Are there wide-chars in that table? Now what? Crackme useless? Too bad. With the right code it is solved ;) and writing a working bruteforcer can solve it
jE! 19. Nov 2007	bruteforcer must know final product.. sorri (to me?;)
_ninar1_ 20. Nov 2007	yep bruteforcer must know the final char range @devoney ASCII and ANSI charcode u can find here http://www.torsten-horn.de/techdocs/ascii.htm its likely www.asciitable.com if the final produkt only has chars from 00h till 7F it can be bruted
Devoney Author 20. Nov 2007	Why is that? If you try al possible codes for the security code then you must get a good answer. It is only harder to determine by programming if the message makes sense.
DigitalAcid 20. Nov 2007	So, it's better to bruteforce ESI (wich is the sum of all chars in the security code) untill we get something "useful" ?
__imp__ 20. Nov 2007	@DigitalAcid: you can find this sum easily without any bruteforce. But it won't help you find the location :(
_ninar1_ 21. Nov 2007	input Argument is 9 chars long uses 0-9 , a-z , and ONLY one "-" A-Z? also included or only small ones i wrote a bruteforcer that test for all possible combination from 30-7A + one 2D when i will run that bruter i will get all possible security codes in that range and that will be much also with the limitation of one 2D will push my 2x2.400 cores some days to get only all possible security code i will send u that code to let u see what i mean
Devoney Author 21. Nov 2007	Some of you have forgotten some hints. You all have quite some braincapacity or otherwise you would not be doing this. A universal location marker is a gps location. Which contains certain chars. Anyone can look tip up
jE! 21. Nov 2007	under universal location should be meant Deg/Min/Sec; not a GPS, wich not contains simbols but DOT.
Devoney Author 21. Nov 2007	how can I point to a location using time? Deg is degrees? well that is used in a GPS thats why there is a degrees sign in it. but why it is a problem to work with values higher then 7F (or so). Is it any difference if you work your way to 65hex or to BAhex?
_ninar1_ 21. Nov 2007	Is it any difference if you work your way to 65hex or to BAhex? yep more bigger bruter, Much more useless CPU-time betwen there exist more then one GP -format
merker 21. Nov 2007	@Devoney : I think I've solved it via 'bruteforce with wildcards' because of 'unreadable' chars in the final message. Now I want to sent the CIA to a building what looks like the letter 'H'. Is it ok ?
Devoney Author 22. Nov 2007	Yes typically an H ! You did it. Hopefully you understand why i picked this location! That building is a science lab!
Zaphod 22. Nov 2007	merker: Are you writing a tutorial? I hope so... Devoney: I know very little about GPS. Is the format a longitude and a latitude?
Devoney Author 22. Nov 2007	yes in that format. I have mentioned that anyone can easyily look it up! ;) (so pick a format that is widely used, Google earth or so ;) )
merker 22. Nov 2007	A real science lab ? Ugh. Maybe we should ask the MI5 if Mr. Bond is avaiable for a 'little task'. :) I will wait a little bit with my tutorial, because mostly fun is over if a solution is avaiable. To know what to search (format !) is the key to solve the crackme properly.
_ninar1_ 23. Nov 2007	k also finished that crackme :D a freaking presions "." i missed in the beginning :( that the yellow thing east of that H some northeast a very shocking place :(
Devoney Author 23. Nov 2007	Once finished, what do you think of this crackme? Is it nice or does it suck?
_ninar1_ 23. Nov 2007	was a really cute one , the hard thing was finding the right format the rest was test and compare in my eyes i send you that solution, but also waiting here to submit (Reason merker posted 3 posts above)
jE! 09. Dec 2007	is there russia at: 51¦16'36.33" N 30¦12'39.49" O ??

Devoney's HideWindow

Download CrackMe_#4.zip, 162 kb (password: crackmes.de)
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CrackMe #4 - By Devoney

Name: HideWindow
Difficulty: 2 (on a scale of 1 to 10)
Executable: MainApp.exe
Goal: Unlock the menu item "Hide Window" by filling in the right password
Security: Password protected

Additional Information:
I have made this crackme because I am trying to get the hang of C/C++.
It is compiled by a standard BloodShed Dev-C++ installation.
I have rated this crackme as 2 (scale 1:10) because it easy but it uses one trick concerned the reading of the password - thats a hint ;) -
If you dont know about GetDlgItemInt then this is still doable for you ;) If you do know about it, then you will find the trick quiete easily.

About Patching:
I dont care if you patch -Try http://www.crackmes.de/users/devoney/crackme_3.0/ if you like to patch ;) -
But if you patch you will not learn how this one is solved properly by yourself ;) and you will not discover the trick by yourself.

Your Reward:
The last time I posted a crackme the reward where chills down your spine if you looked up the location in the message at the end.
This time your reward is the possibility to use a functional application.

Goodluck, have fun and mail me with questions/solutions/greetings etc.
Devoney (klerkdemike@hotmail.com)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 01. Jan, 2009
Downloads: 379

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by shellwolf, published 05. jan, 2009; download (1 kb), password: crackmes.de or browse.

shellwolf has rated this crackme as nothing special.

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Discussion and comments

Predator 04. Jan 2009	I think you have do a mistake /40160B/ MOV DWORD PTR SS:[EBP-4], EAX /40160E/ CMP DWORD PTR DS:[406144], 34EA090 /401618/ JNZ SHORT MainApp.00401651 /40161A/ CMP DWORD PTR SS:[EBP-4], 15B8 /401621/ JNZ SHORT MainApp.00401651 first you put in [EBP-4] the serial that must be dec of 34EA090 next at offset 40161A you read [EBP-4] and must be 15B8 but the serial is always 34EA090 Predator
shellwolf 05. Jan 2009	it is a trick .....not a mistake
simonzack Moderator 13. Jan 2009	Just why... couldn't you say it weren't simply a fake algo :( i spend time looking everywhere for the real algo until i looked at the answer to realize it wasn't fake after all...
Devoney Author 13. Jan 2009	Hopefully that makes this one original, yet simple.
g4hsean 14. Jan 2009	if you want to patch then, change MOV DWORD PTR SS:[ESP+8],1 to MOV DWORD PTR SS:[ESP+8],0 004014E6 \|. E8 15190000 CALL <JMP.&USER32.GetMenu> 004014EB \|. 83EC 04 SUB ESP,4 004014EE C74424 08 0000>MOV DWORD PTR SS:[ESP+8],0 004014F6 \|. C74424 04 6D00>MOV DWORD PTR SS:[ESP+4],6D 004014FE \|. 890424 MOV DWORD PTR SS:[ESP],EAX 00401501 \|. E8 0A190000 CALL <JMP.&USER32.EnableMenuItem> else if you like fishing, then the solution made is the solution i got too. Theres also a third way to patch the prog too, but ill leave that up to an unskilled reverser.

Dexter's Dexter's simple crackme #1

Download dexter_1.zip, 26 kb (password: crackmes.de)
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Dexters Simple crackme #1

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 25. Apr, 2004
Downloads: 920

Rating

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Solutions

Solution by nEo_TheOne, published 26. apr, 2004; download (856 b), password: crackmes.de or browse.

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diabel's diabel cm 2oo6 N0T4N00BS

Download diabel2oo6_n0t4n00bs.zip, 18 kb (password: crackmes.de)
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This is my 2nd crackme written especially for polish reverser "deus" who cracked my 1st crackme and who told that im a lamer, so i wanted to do something better and this time my friend deus failed. Try it yourself :)

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 08. Jan, 2007
Downloads: 178

Rating

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Solutions

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diablo's Orion Crackme 1

Download orion_crackme1.zip, 260 kb (password: crackmes.de)
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Serial

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 18. Sep, 2002
Downloads: 6320

Rating

Votes: 12
Crackme is boring.

Rate this crackme:

Solutions

Solution by Reverser, published 19. aug, 2005; download (275 b), password: crackmes.de or browse.

Reverser has rated this crackme as nothing special.

Solution by _pusher_, published 19. sep, 2002; download (371 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

DrPepUr 14. Feb 2008	Nice Prize..... lol
manatails007 05. Jun 2008	PRIZE, lolololololololol
lavendala 16. Jun 2008	Please never make another one
tecywiz121 06. Jul 2008	First crackme, and I did it :)
stoffern 11. Sep 2008	what you see is what you get... and that does not go for the picture:) hehe
hackereha 11. Sep 2008	nice prize lol thx for this nice cme:P
SimpleData 31. Oct 2008	Nice prize. Thanks. :)
rami 18. Mar 2009	I've got iz! yeah! ^^
T.0.R.N.A.D.0. 19. Mar 2009	LOL !!!! hahahaha !!! @author Please rate this crackme ONLY for 18+. Nice prize ! Cracking this was *vErYeAsY*
Easle 22. Jun 2009	Ewh.. the prize is lowres.. damn it :D
Zakne 23. Jun 2009	hahahaha i liked only one thing in this crackme the pize )))))))))))))
microelite7711 24. Jun 2009	The first CrackMe I've completed, Yay!!!
anay 22. Jul 2009	^The firt crack me that i completed yeahh but.. i don't like too much the prize (i'm a woman) :P put an option for me hehe
HellMan1908 24. Jul 2009	anay LOL hahaha :D ps: nice crackme, but tooo easy ^_^
*DNison** 27. Jul 2009	i wonder if anyone was actually silly enough to need more than 1 attempt at this crackme
p2004a 27. Dec 2009	My first crack me 4h. I must learn more
wodka 02. Feb 2010	nice crackme and nice prize :D
Thanar 19. Mar 2010	solved! ^^ so easy
BlueMelon 24. Mar 2010	lol cracked ;) pretty easy, lol at prize.
Mathe 27. Jun 2010	Very Very Very easy *vErYeAsY* And that porn photo ? kkk
vasto 14. Sep 2010	well nice chick :D
newbie_olly 22. Dec 2012	nice gift, cracked
bolzano_1989 04. Jan 2013	Could someone recover the source code of this Borland C++ crackme instead of just cracking it :) ?
NukeCrack 07. Jan 2013	Patched by NukeCrack Time : 5min And thx for the price
NukeCrack 07. Jan 2013	priZe sorry :-(
chuck 10. Jan 2013	solved = nice prize, will have to try more :-)
gh0st1 11. Jan 2013	fucking hell ya first crackme ever
cactusrap 14. Jan 2013	Please anyone tell me how I can find a string "wrong code", I want to do this to find solution but I don't know where I must looking for. Please help me i'm alone here
lonestar 05. Aug 2014	You naughty dog :)
fangrenxing 27. Apr, 07:55	개자식이로군! 선물이 뭐나 해서 보았더니...
admin123456 26. May, 06:26	shit,I feel my stomach is over
jpapt3c 16. Nov, 23:25	nice prize lmao
kuqadk3 17. Nov, 03:49	good prize bro =]]]

diablo's Orion Crackme 2

Download orion_crackme2.zip, 294 kb (password: crackmes.de)
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Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 2581

Rating

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Solutions

Solution by Reverser, published 05. sep, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by Scooby D0o, published 25. sep, 2002; download (4 kb), password: crackmes.de or browse.

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diablo's Orion Crackme 3

Download orion_crackme3.zip, 234 kb (password: crackmes.de)
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I dunno...

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 2424

Rating

Waiting for at least 3 votes
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Solutions

Solution by EOD, published 06. jan, 2003; download (4 kb), password: crackmes.de or browse.

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diablo's Orion Crackme 4

Download orion_crackme4.zip, 267 kb (password: crackmes.de)
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Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 2440

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by yudi, published 30. sep, 2008; download (354 kb), password: crackmes.de or browse.

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Solution by Exhuman, published 26. sep, 2002; download (2 kb), password: crackmes.de or browse.

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diablo2oo2's diablo2oo2's Crackme 01

Download d2k2_crackme_01.zip, 3 kb (password: crackmes.de)
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Its my first Crackme written in masm32.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 12. Sep, 2003
Downloads: 1884

Rating

Waiting for at least 3 votes
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Solutions

Solution by shvanz0r, published 05. jul, 2004; download (3 kb), password: crackmes.de or browse.

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Solutions

Solution by Oorja-HalT, published 18. sep, 2003; download (22 kb), password: crackmes.de or browse.

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Solution by elfz, published 17. sep, 2003; download (21 kb), password: crackmes.de or browse.

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Solution by BadSector, published 17. sep, 2003; download (5 kb), password: crackmes.de or browse.

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Solution by BytePtr, published 17. sep, 2003; download (47 kb), password: crackmes.de or browse.

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diablo2oo2's diablo2oo2's Crackme #08

Download _d2k2_crkme08.zip, 8 kb (password: crackmes.de)
Browse contents of _d2k2_crkme08.zip

Its not very hard. just use your brain and analyse the code.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Assembler

Published: 08. Mar, 2005
Downloads: 1461

Rating

Waiting for at least 3 votes
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Solutions

Solution by morecode, published 26. oct, 2015; download (315 kb), password: crackmes.de or browse.

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Solution by BadSector, published 14. mar, 2005; download (44 kb), password: crackmes.de or browse.

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Discussion and comments

andrewl.us Moderator 26. Oct 2015	check out morecode's well polished solution

diablo2oo2's diablo2oo2's Crackme #09

Download _d2k2_crkme09.zip, 2 kb (password: crackmes.de)
Browse contents of _d2k2_crkme09.zip

diablo2oo2's Crackme #09
------------------------

name: d2k2.crkme.09.exe
size: 6 kb
code: masm32
date: 02.12.2008

About:
After long time i decided to make
a new keygenme...

Rules:
1) No patching
2) Find serial for your name
3) Make a Keygen =)

Solutions go also here:
e-mail : diablo2oo2@gmx.net
Homepage: http://diablo2oo2.cjb.net

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 09. Dec, 2008
Downloads: 580

Rating

Votes: 3
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by Zaphod, published 23. dec, 2008; download (65 kb), password: crackmes.de or browse.

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Solution by PeterPunk, published 23. dec, 2008; download (17 kb), password: crackmes.de or browse.

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Solution by Kalippan, published 23. dec, 2008; download (57 kb), password: crackmes.de or browse.

Kalippan has rated this crackme as quite nice.

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Discussion and comments

shellwolf 19. Dec 2008	name:shellwolf serial:oNc06RBKx

diablo2oo2's diablo2oo2's Crackme #10

Download _d2k2_crkme10.zip, 5 kb (password: crackmes.de)
Browse contents of _d2k2_crkme10.zip

diablo2oo2's Crackme #10
-----------------------------------------+

name: d2k2.crkme.10.exe
size: 19 kb
code: masm32
date: 21.04.2009

-----------------------------------------+

About:
A new keygenme for advanced keygenners.
Try to make a real keygen! Don't give up!

-----------------------------------------+

Rules:
1) No patching
2) Find serial for your name
3) Make a Keygen =)

-----------------------------------------+

Solutions go here:
e-mail : diablo2oo2[at]gmx[dot]net
Homepage: http://diablo2oo2.cjb.net

i will upload only solutions with
included sourcecode. A tutorial is
optional.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 22. Apr, 2009
Downloads: 466

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by scarebyte, published 29. apr, 2009; download (63 kb), password: crackmes.de or browse.

scarebyte has rated this crackme as quite nice.

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Discussion and comments

divinomas 23. Apr 2009	yet another md5 bruteforce crackme
MR.HAANDI 23. Apr 2009	sudokus are not solved by bruteforce
divinomas 23. Apr 2009	I didn't know what's sudoku. But I thought the first serial transformation algorithm might be so-called "sudoku", which preforms lots of substitute and I neglected it in my initial coarse analysis. The final portion use md5 hash to match hardcoded value and I thought it would get much time to break. :)
simonzack Moderator 23. Apr 2009	sudokus? why is this lvl6?
MR.HAANDI 29. Apr 2009	Since only the diagonal is "different" in each instance, you do not need to solve the sudoku problem every time, but just map/rename the values 0, ..., F, in the sudoku accordingly;)

diablo2oo2's diablo2oo2's Crackme #7 - "Cracking Fun"

Download _d2k2_crkme07.zip, 3 kb (password: crackmes.de)
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diablo2oo2's Crackme #07
------------------------

name: d2k2.crkme.07.exe
size: 7 kb
code: masm32
date: 06.12.2004

About:
Find out how to make a keygen. You must use your
brain to solve it. When you send a nice solution
with keygen source, i will put it on my page.

Rulez:
1) No patching
2) Find serial for your name
3) Make a Keygen =)

e-mail : diablo2oo2@gmx.net
Homepage: http://diablo2oo2.cjb.net

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 07. Dec, 2004
Downloads: 1442

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by Lesco, published 30. jan, 2006; download (28 kb), password: crackmes.de or browse.

Lesco has rated this crackme as quite nice.

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Discussion and comments

.:hack3r2k:. 18. Sep 2005	Use any 4 length name with serial 00000000000000000000000000000000 . Is 0 sec problem. Br;)

digitalbyte's lincrkme_01

Download lincrkme_01.zip, 4 kb (password: crackmes.de)
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this is lincrkme_01 for DVL (working on Linux in generally):
Well maybe the serial-algo will be simple but you have to take care not to get fooled!;) So don't waste time: open up gdb, break main and find your way through the code.

OS : Linux
Language : C
Compiler : gcc

target : make a solution and write a keygen

greets
digitalbyte

Difficulty: 2 - Needs a little brain (or luck)
Platform: DVL - Damn Vulnerable Linux
Language: C/C++

Published: 12. Mar, 2007
Downloads: 398

Rating

Votes: 3
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by macabre, published 21. mar, 2007; download (4 kb), password: crackmes.de or browse.

macabre has rated this crackme as boring crap.

Discussion and comments

stefanie 21. Mar 2007	hey! i noticed that you are using mammon's gdbinit. i wonder if you are interested in a color coded version? http://gnurbs.blogsome.com/2006/12/22/colorizing-mamons-gdbinit/ cheers
macabre 22. Mar 2007	lol, thanks stefanie!! Leet colors are always nice :P heheheh Cheers!

dila's Fishing with DiLA v0.1

Download fwdv1.zip, 4 kb (password: crackmes.de)
Browse contents of fwdv1.zip

These small challenges are designed to test your debugging and assembly skills.

I've decided not to overwhelm you with instructions, as most crackmes do
but rather keep the code to a minimum, focusing on one or two really specific tricks.

The crackmes range in difficulty from a single comparison with an immediate constant
to some slightly more elaborate execution control - however all of the crackmes
follow on from each other, all the window code is exactly the same.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 14. Mar, 2006
Downloads: 1113

Rating

Votes: 5
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by znycuk, published 17. mar, 2006; download (1 kb), password: crackmes.de or browse.

znycuk has rated this crackme as nothing special.

Solution by Willi000, published 17. mar, 2006; download (484 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

moofy 14. Mar 2006	Easy but nice :)
dila Author 14. Mar 2006	thanks :) perhaps this one is just too easy, but you will become familiar with the window code so you'll know where to look in the other versions.
kittmaster 04. Apr 2006	The serial is hardcoded, no keygen required...........

dila's Fishing with DiLA v0.2

Download fwdv2.zip, 4 kb (password: crackmes.de)
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Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 14. Mar, 2006
Downloads: 915

Rating

Waiting for at least 3 votes
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Solutions

Solution by Willi000, published 17. mar, 2006; download (509 b), password: crackmes.de or browse.

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Solution by vasquez, published 17. mar, 2006; download (998 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

l0calh0st 15. Mar 2006	Don't post the serial here.....:)
Shism 15. Mar 2006	like magus said
Ank83 15. Mar 2006	Balthasar_magus read the FAQ ! I had the same problem like you ! :)))
kittmaster 04. Apr 2006	Serial is hardcoded and subtracted.........
abrakadabra 29. Mar 2014	too difficult ... xD

dila's Fishing with DiLA v0.3

Download fwdv3.zip, 4 kb (password: crackmes.de)
Browse contents of fwdv3.zip

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 14. Mar, 2006
Downloads: 1136

Rating

Votes: 3
Crackme is boring crap.

Rate this crackme:

Solutions

Solution by AttilhaZ, published 17. mar, 2006; download (2 kb), password: crackmes.de or browse.

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Solution by HMX0101, published 17. mar, 2006; download (1021 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

kittmaster 04. Apr 2006	Look at the comparison just before bad boy message in the ebx register...........;)
Darkness 13. May 2006	I see the correct line to look at but how do you know what ebx is equal to?
Wasted_Bytes 20. May 2006	If you look above the compare you can see with what compares ebx

dila's Fishing with DiLA v0.4

Download fwdv4.zip, 4 kb (password: crackmes.de)
Browse contents of fwdv4.zip

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 14. Mar, 2006
Downloads: 1195

Rating

Votes: 3
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by HMX0101, published 17. mar, 2006; download (1 kb), password: crackmes.de or browse.

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Solution by l0calh0st, published 17. mar, 2006; download (3 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

kittmaster 04. Apr 2006	Another good one...........
Fumle 16. Apr 2006	I was getting angry at this one, until I saw the solution and figured out that it can't be solved i W32Dasm, it doesn't see the code as Olly does.. :)

dila's Fishing with DiLA v0.5

Download fwdv5.zip, 4 kb (password: crackmes.de)
Browse contents of fwdv5.zip

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 14. Mar, 2006
Downloads: 1518

Rating

Votes: 8
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by Ank83, published 17. mar, 2006; download (8 kb), password: crackmes.de or browse.

Ank83 has not rated this crackme yet.

Solution by l0calh0st, published 17. mar, 2006; download (2 kb), password: crackmes.de or browse.

l0calh0st has rated this crackme as quite nice.

Send a message to dip22e »

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Discussion and comments

Scortile 14. Mar 2006	hmm.. wondering what the solution for this one will be if 4291814517 is incorrect..
Scortile 14. Mar 2006	stupid me.. got it :)
l0calh0st 14. Mar 2006	Good one..Keep it up :)
Scortile 14. Mar 2006	where's DiLA v0.6? from here on it's getting fun :)
TWiST 14. Mar 2006	What's the meaning of this crackme? I've found a working serial, and I patched the program so it'll accept any serial. Is that what you need or do you want a Keygen?
TWiST 14. Mar 2006	Thanks for this nice crackme btw ;)
Ox87k 14. Mar 2006	keygen?!?! there is only 1 serial for crackme, and all crackme are very idiots! :P btw, thanks for ur work dila... =)
HMX0101 14. Mar 2006	i need to make a bruteforcer for this... dila, good crackmes but very easy :)
Nerds 15. Mar 2006	Very Good Dila, Tx a lot.
F4te 15. Mar 2006	Nice, lots of twists and turns ;)
znycuk 15. Mar 2006	this one is nice :) Others in the serie "Fishing with DiLA" are really really easy, even for newbies like me. Thanks for your work DiLA.
Ank83 15. Mar 2006	Balthasar_magus read the FAQ !
m31t3d_bra1n 17. Mar 2006	lol. am i missing the point? in v3,v4,v5 i just changed the JE to JNE to get to the message. now just clicking 'register' is good enough without having to type anything in the box. does that count as a pass ?
znycuk 17. Mar 2006	m31t3d bra1n: I think this crackme is too easy to allow patching... Even if it is not explicitly said by the author.
FBI 19. Mar 2006	I need help with Serials and this, but patching this was no problem :)
Ank83 20. Mar 2006	FBI what kind of help do u asking for ?
Mike 07. Apr 2006	I found another solution :) when ax<>bx twice,but in the end it =00000001
IronButterfly 02. Nov 2006	1,2,3 and 4 were ok. This is not clear. where to find a calculator for ROL and pls give a step by step solution. Thanks. I must stop here.
deibiz_xxl 27. Dec 2007	wtf! the second twist is breaking my head...
deibiz_xxl 28. Dec 2007	well done, clear but confusing code... XD

dip22e's CrackMe #1 by dip22e

Download crcme.zip, 2 kb (password: crackmes.de)
Browse contents of crcme.zip

** CrackMe #1 by dip32e

Find a forgotten password...
It's so easy...

Coded in assembler.
Happy cracking :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 30. Jan, 2009
Downloads: 1785

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by main, published 05. feb, 2009; download (2 kb), password: crackmes.de or browse.

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Solution by macduff, published 05. feb, 2009; download (2 kb), password: crackmes.de or browse.

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Solution by sghctoma, published 05. feb, 2009; download (13 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

macduff 01. Feb 2009	Great one; I hadn't seen that method for checking for debugger before.
main 02. Feb 2009	How many correct passwords must the keygen produce? Is like 4 passwords enough?
dip22e Author 02. Feb 2009	@main: Yes. However, the best solution is random s/n generation algorithm (all correct passwords).
main 04. Feb 2009	Nice that it uses TIB->PEB. I like that. Solution on the way.
Nick_Meister 17. Feb 2009	oooh yay this is my first crackme ever, lol and i solved it without using a runtime debugger, i just read the dissassembly , i must say pretty nice, and i even found the point where you check for the debugger :D
Kainat 22. Jun 2009	perl -e "for($i=9;$i--;){print $i?chr(97+($i-(97%$i))+(int(rand(int(25/$i)))*$i)):"\n";}"
ShadowRayzz 30. Jul 2009	Very interesting anti-debugging method, first time i see something like that :D
deibiz_xxl 30. Aug 2009	@Kainat... if that is a routine for serial generation... it is forbidden to post it here.
deibiz_xxl 30. Aug 2009	lol... I have python keygen... if someone wants to see it, message me.
s0cial_integir 08. Apr 2011	I am still learning tha BASICS of cracking, it surely takes a smart person. I tried cracking this myself and i couldnt work it right, i tried all 3 solutions and nothing in tha solutions match what i have or see in my debugger/disassembler. I use olly, there are no intermodular calls, or any coding that suggests anything they show on solutions. I try hiew but then i cant run debugger with it that i know of. its one dead end road after another.. help if anybodys interested...
Chug 12. Apr 2011	s0cial integir, I feel your pain. I'm a newbie myself it wasn't so long ago I was where you are now. It not so much smartness thats needed but knowledge. Anyone who thinks there is an easy path to it is mistaken. Have you started with Lena151's tutorials yet? They're the way to go believe me. Where are you stuck exactly? There are 9 intermodular calls I noticed. This program uses a trick to confuse an unmodified Olly - find a fixed edition or study some tuts. I used an find API call search, GetDialogItemTextA and set a BP on that but you could just step the code - the serial algorithm is right beneath it. Heres a hint - find out what CDQ and DIV do. Good luck!
edza 15. Nov 2014	Hi! Very cool crackme for a complete beginner like me. First ever keygen I wrote, second solved crackme ever. Thanks guys for making these beginner level too. To you it might be too "booring", but it was fun for me to learn. Link is pastebin for C# keygen. http://pastebin.com/v4XpgZG2 (Sorry about the variable names, i made this while I couldn't sleep and didn't think about showing it to others. I think the algorithm is self-explanatory to an extent) :)

DisasmDisease's KeyWizard 1

Download KeyWizard_1_Ready.zip, 28 kb (password: crackmes.de)
Browse contents of KeyWizard_1_Ready.zip

Have fun with this little KeygenMe.

Rules:
- No patching
- Make keygen
- No use of Reflector

Prizes:
- Gold medal: Keygen
- Silver medal: Single name and serial

Have fun!
DisasmDisease

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 15. Jun, 2009
Downloads: 329

Rating

Votes: 6
Crackme is quite bad.

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Solutions

Solution by MCxCodex, published 24. jun, 2009; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

DisasmDisease Author 27. Jun 2009	Solution by MCxCodex gets gold medal! Perfect!
MCxCodex 30. Jun 2009	@DisasmDisease Thanks :) I'm busy with other crackmes, but if I have time I will start to work on your KeyWizard 2
MrGneissGuy 01. Aug 2009	This is a level 1. The name is modified then compared to the serial provided. There's hardly any thinking involved.
DisasmDisease Author 27. Dec 2009	why didnt you solve it then?^^

DisasmDisease's KeyWizard 2

Download KeyWizard_2.zip, 28 kb (password: crackmes.de)
Browse contents of KeyWizard_2.zip

Shouldnt be that easy this time.

Rules:
- No patching
- Make keygen
- No use of Reflector
- Write tutorial how you did it

Prizes:
- Gold medal: Keygen
- Silver medal: Single name and serial

Have fun!
DisasmDisease

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 16. Jun, 2009
Downloads: 380

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by deurus, published 17. jul, 2010; download (37 kb), password: crackmes.de or browse.

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Discussion and comments

The So;X 01. Jul 2009	This is not vb crackme ....This is .net crackme
saitob 01. Jul 2009	Solved. Very easy...
DisasmDisease Author 11. Jul 2009	@saitob if you did it, then upload solution & tutorial. i could also say i cracked MR.HAANDI's Short Sign ^^ but i didnt :)
MrGneissGuy 01. Aug 2009	This is in no way a level 2.

DiS[IP]'s creakme_001

Download Serialme.zip, 2 kb (password: crackmes.de)
Browse contents of Serialme.zip

This is my first CrackMe. Is very simple, so you should crack it fast.

Coded in Assambler
File is off course not packed:)
Difficulty: 0/10:)

Send solution to www.crackmes.de, but only if you are newbie!!! Professionals don't send this is unhuman;)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 04. Sep, 2005
Downloads: 1610

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by coffeemike, published 06. sep, 2005; download (4 kb), password: crackmes.de or browse.

coffeemike has rated this crackme as quite nice.

Solution by D4ph1, published 06. sep, 2005; download (37 kb), password: crackmes.de or browse.

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Solution by Ox87k, published 06. sep, 2005; download (49 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 04. Sep 2005	i found a bug... i think.. if i put name: zZz999 serial: zaZbzc9d9e9f the creakme don't get this serial but " aZbzc9d9e9f" without the first char.... is this a bug??
Ox87k 04. Sep 2005	mmm sorry the creakme get this serial " aZbc9d9e9" so i think u declare a buffer for serial long only 10 byte... :\|
code_inside 04. Sep 2005	The CrackMe first gets the serial in a buffer of size 256, then it gets the name also in a buffer with size 256, but the name buffer is 6 bytes before the serial buffer and so the name will override the serial (If it's longer then 5 characters (Including terminating NULL)). DiS[IP] should recode the CrackMe :)
BieX 04. Sep 2005	well, yeah.. in other words the name is an array of 0 to 4 ---> ADDRESS:004010fe Validate() { InputName[4] = ''; Serial = ''; RealSerial = ''; i = 0; do { if(InputName[i] == "Z") { InputName[i] = InputName[i] - 1; } if(InputName[i] == "z") { InputName[i] = InputName[i] - 1; } if(InputName[i] == "9") { InputName[i] = InputName[i] - 1; } // the bug: RealSerial[i] = (I 2 + 0x40301a); -- inputname is has a max char array of 4 RealSerial[i] = InputName[i] + 1; RealSerial[i+1] = InputName[i+1]+ 0x61 + I; if(Serial[i]+Serial[i+1] != RealSerial[i]+RealSerial[i+1]) { goto @BadKey; } I++; } while(I != length(RealSerial)); if(Serial == RealSerial) { return MessageBoxA(00403000, "Register complite!!!", ".:: DiS[IP] Programer ::.", 0); } @BadKey: return MessageBoxA(00403000, "Name or Password is BAD!!", ".:: DiS[IP] Programer ::.", 0); }
Ox87k 04. Sep 2005	yeah... btw i sumbitted my keygen when i write my first comment here. I know this "bug". I don't include the max char limit on name. (so i hope my solution is correct!)
tHOBAS 04. Sep 2005	the only bug that i finde is that just accepte 5 characters whith max y 3 charracter with minimum Sorry my english is very bad
setty 06. Sep 2005	name: setty pass : tafbucudze i craked it in 1.5 min. then if put nop on 40113d it will acept any pass
coffeemike 06. Sep 2005	Nice crackme for beginners. Solution (really a walkthrough) submitted.
BieX 06. Sep 2005	its very easy to see how the code is generated by looking at a Name/Serial.. eg. name: 0000 serial: 1a1b1c1d
D4ph1 06. Sep 2005	The program can accept as much characters as we want but more than 3! Well i submit my solution with the key generator who accept until 30 chars...hope its right
neverdas 20. Sep 2005	neverdas 05.09.20
deibiz_xxl 20. Sep 2005	D4ph1, have you tested your keygen?? I also think that there is a bug, because I have written a crackme that works for every string with a maximum length of 5.
deibiz_xxl 20. Sep 2005	I have had an idea. Maybe DiS[IP] have coded it thinking that if the name is more than 5 chars long, you have to take some chars out at the beginning of the pass. For example, if your name is 7 chars long, you have to code your serial in the normal way, but then you have to take out 7-2 chars out at the beggining of the string. Somebody understand me? Maybe this is correct?
deibiz_xxl 20. Sep 2005	I have commited an error, I want to say 7-5, not 7-2, you know?
deibiz_xxl 20. Sep 2005	I have tried to code something, but I can't make it work.
csin 24. Sep 2005	KeyGen: http://www.csin.host.sk/DiS[IP]'s creakme_001 KeyGen.exe
D4ph1 24. Sep 2005	deibiz_xxl as CodeInside and Ox87k said before, the name can't be longer than 5 letters. My key generator takes more than 5 letters in the name and of course it doesn't generate a valid serial. For 3 to 5 letters though it works just fine. The bug in my program is that i've forgotten a '=' and soon i will update it. csin's keygenerator works good!

DizzY_D's CrackMe #1 by DizzY_D

Download crackme.zip, 3 kb (password: crackmes.de)
Browse contents of crackme.zip

Here is my CrackMe #1.

You have to possibilitys to solve it:
GOLD = Find the correct password
SILVER = Patch it

After you have done this a tutorial would be very nice. :)

Have fun & good luck,
DizzY_D

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 15. Jun, 2010
Downloads: 555

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by BoRoV, published 21. jun, 2010; download (17 kb), password: crackmes.de or browse.

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Discussion and comments

BoRoV 16. Jun 2010	Nice crackme, simple vm :) I make correct password, but I see message with "Nice! But I think you only patched me! :P" But I did not patch.
DizzY_D Author 16. Jun 2010	Yes this is the correct good boy message. So you cracked it. :) Now write a solution.
quangredlight 21. Jun 2010	@BoRoV: I have read your solution, but I don't understand what VM is. Can you tell me, please ? I'm a newbie.
Saduff 21. Jun 2010	VM = Virtual Machine. The code is virtualized and run in a VM.
costy 26. Jun 2010	I'm interested in writing a virtual machine. Any help?
Coderess 26. Jun 2010	I too interested, I read this article http://virustech.org/f/viewtopic.php?id=27 use google to translate it :)

~dJ~'s crack2

Download crack2.zip, 6 kb (password: crackmes.de)
Browse contents of crack2.zip

little harder than the previous

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. May, 2004
Downloads: 716

Rating

Waiting for at least 3 votes
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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

~dJ~'s Crackme1

Download crckme1.zip, 6 kb (password: crackmes.de)
Browse contents of crckme1.zip

for noobs

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 20. May, 2004
Downloads: 1038

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Solutions

Solution by nickdigital, published 22. oct, 2004; download (7 kb), password: crackmes.de or browse.

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Solution by lixiaoquan, published 20. oct, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by ZeroZero, published 22. may, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by Pumqara, published 21. may, 2004; download (491 b), password: crackmes.de or browse.

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~dJ~'s Forcrck

Download 4crck.zip, 6 kb (password: crackmes.de)
Browse contents of 4crck.zip

Enable the button.. get password

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 20. May, 2004
Downloads: 1185

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Solutions

Solution by Plasmator, published 26. aug, 2004; download (16 kb), password: crackmes.de or browse.

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DJ1hAD0's DJ1hAD0's newbie decryptme1

Download DJ1hAD0_s_hewbie_decryptme_1.zip, 9 kb (password: crackmes.de)
Browse contents of DJ1hAD0_s_hewbie_decryptme_1.zip

It's a very easy small decryptme for absolute newbies, like me:)

Just find the magic word for decrypt hidden message.

Everything is allowed;)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 25. Aug, 2016
Downloads: 543

Rating

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Solutions

Solution by Astrocyt, published 20. oct, 2016; download (50 kb), password: crackmes.de or browse.

Astrocyt has rated this crackme as nothing special.

Solution by pixelpirat, published 20. oct, 2016; download (1 kb), password: crackmes.de or browse.

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Solution by beaver, published 20. oct, 2016; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

sn4pf1sh 29. Aug, 15:36	Can anyone give me a hint?
beaver 30. Aug, 12:31	sn4pf1sh, 4013A9 fgets call
luxdav 30. Aug, 14:40	Was fun! Thank you! "Congratulations! You won, Dude! Please, send your solution."
sn4pf1sh 30. Aug, 20:22	I don't know what to do with the hashed string ""W{zsfu`axu`}{zg54M{a4c{z84Papq54Dxqugq84gqzp4m{af4g{xa`}{z:4OP^%\|UP$I"" @beaver: Thx, but this didn't help, maybe i'm missing something?
luxdav 31. Aug, 00:01	spoiler alert: The first thing you can do is decrypting the string without the magic word. The first part of the code checks if your magic word is correct, the second part decrypts the string (second part starts at 401401). If you solved the decryption, think about how the password has to look like, you want to enter the second part.
beaver 31. Aug, 06:14	sn4pf1sh, just XOR(wierd_string, 0x14). 14 is the result of the subtraction.
sn4pf1sh 31. Aug, 22:11	Can anyone please post a solution? This CrackMe is quite interesting and would help me for understanding the (ASM) decrypting logic. Thank you anyway @beaver ;)
luxdav 01. Sep, 00:22	I actually found my own password "luxdav__\|"
luxdav 01. Sep, 01:10	This is my uncommented solution: https://github.com/LuxXx/reverse-engineering/tree/master/DJ1hAD0 But really, try it yourself again, looking up my solution will ruin your fun.
sn4pf1sh 01. Sep, 13:17	Ok, thank you guys, especially @luxdav and @beaver. This helped me a lot. Now I'm able to understand control flow of the logic. I wrote the decrypting logic for myself in ANSI C and debugged this in x64dbg. Now I understand a lot more. Sorry for my bad english! :)
luxdav 06. Sep, 18:18	I had some time and wrote a tool that generates some passwords: https://github.com/LuxXx/reverse-engineering/tree/master/DJ1hAD0/solution/password/bruteforce It wasn't necessary but I wanted to do it.
herbie 28. Sep, 19:29	My own password: herbie{c}
rentf 06. Oct, 19:23	My password is: rentf{Zc} #include <stdio.h> int main() { char in[10]; int a = 0; fgets(in, 10, stdin); for (int i=1; i<=9; i++) a += in[i]; if (a != 866) printf("%i>866", a); else printf("Bingo!"); }
rickolous 28. Nov, 02:44	I wrote a very thorough walkthrough for this problem. Here is a link to my github.io page [https://rickolous.github.io/2016/11/27/very-easy-1-windows/]

DjH2oo7's DjH's CMe no#1 (VCL)

Download cm1.zip, 288 kb (password: crackmes.de)
Browse contents of cm1.zip

My first, but not very easy CMe...
Here are the LeVeLs:

1. Remove AntiDebuging (superextramegahypraantidebug =))
2. Serial Fishing
3. Remove NAG
4. Keygen
5. Mailing

Your task, is go to at least
level 3 (so level 5 is
commonplace =)). Write me,
how you rating this CMe plz =)
Hmm...I rate it 2/10...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 08. Sep, 2007
Downloads: 628

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Solutions

Solution by zart, published 15. sep, 2007; download (116 kb), password: crackmes.de or browse.

zart has rated this crackme as quite nice.

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Discussion and comments

zart 10. Sep 2007	What language is this: "registrovano uspisni..." I've traced through everything and I understand how the serial number is checked. However after floating past all the "bad boys" I get a msgbox with this in it. It looks like czech... though I do not know what "uspisni" means.
zart 10. Sep 2007	Looking a little deeper and at the instructions... Is this the NAG?
zart 10. Sep 2007	Finished, let me just finishing typing up my solution and send it off.. I'm assuming that message box was the nag - even though I'm not sure what it says.
DjH2oo7 Author 10. Sep 2007	Sorry, it was Czech CMe and then I Englished it :-), Sorry, some czech strings I forget to translate :( but up here you solution plese :)
zart 10. Sep 2007	That is the nag screen we are sopost to remove though, correct?
zart 10. Sep 2007	there is an error in this keygen. the serial check in the form performs 8 checks, while the form load performs 9 checks. the problem is the checks conflict with each other, example; username: zart serial: 4D33S6-39a That one works from inside the program, let it run and save it - then restart it. This will not work since it is now checking the 8th character to '4', which will make it not work. Now if you change the information to: username: zart serial: 4D33S6-49a This one WILL work on load up and show the proper registered screen. However this serial conflicts with checks performed to verify serial in the normal part of the program. I doubt this is how the keygen me is sopost to work. Sad because I have a working keygen for it now (both 'in form' serials and 'out of form' serials);\
TiGa 11. Sep 2007	You can write a solution AND explain the bug in more details. Sometimes, looking for the cause of a bug can be interesting.
red477 11. Sep 2007	@zart, I think it is on purpose.Djh2oo7 maybe want it that way. On fake check and one hidden real check. And the form_load check is the real check, I think.
red477 11. Sep 2007	@zart, I think it is on purpose. Djh2oo7 maybe wants it that way. One fake check and one hidden real check. And the form_load check is the real check, I think. sorry for my previous bad spelling:(
DjH2oo7 Author 11. Sep 2007	Sh*t, with many bugs like these I don't bargain :( No, on form_load...I found the bug on ButtonPress, but I forgot to repair it on FormCreate...sorry :(, I expect, the next CMes will be without the bugs :), so Send please some solutions, how you get at least the right s/n on ButtonPress... BTW: "Registrovan uspisi" is "Registrováno úspěšně", translated "Registered sucessfully" :), next CMes will be with API Only (no VCL, Delphi 7)... So sorry for too many bugs :(, but I thanx very well that you reversing it :) Sorry for my poor english, I'm Czech ... you can see it on non-translated string =) And...the nag is the first window after app start... With the girl ;)
DjH2oo7 Author 11. Sep 2007	So once again: The messageBox after Sucess regisrer ISN'T the nag!!! The NAG IS THE WINDOW WITH THE GIRL!!! =)
zart 11. Sep 2007	@DjH2oo7 Ok I finished writing up everything for the "ButtonPress" and almost done with the form create. I'll work on the "NAG" screen - since I just assumed the message box was a nag.

DjH2oo7's Keygen#1 by DjH

Download keygenme.zip, 18 kb (password: crackmes.de)
Browse contents of keygenme.zip

DjH's KeygenMe#1
----------------
The one and only solution is a keygen!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 03. Mar, 2010
Downloads: 699

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by _ghandi_, published 09. mar, 2010; download (7 kb), password: crackmes.de or browse.

_ghandi_ has rated this crackme as nothing special.

Solution by solv3nt, published 09. mar, 2010; download (92 kb), password: crackmes.de or browse.

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Solution by Carax, published 09. mar, 2010; download (114 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Carax 06. Mar 2010	Pass: E@@@-445X-XBXX-AAAA-XXXB I will try do a keygen thanks DjH
sacad 06. Mar 2010	key:UHF9-T37D-1QRT-SHIT-G6JQ and sorry for the bad word :D ... celkem zabavny CME ale na keygen sem pekne linej :) jsem rad ze tu nejsem sam Cech :)
Coderess 06. Mar 2010	]^C4-678X-XSXX-XFL9-XXXS where X - Random S - Same Soglasen s tem shto zabavny :)
DjH2oo7 Author 06. Mar 2010	sacad: <czech>nemam te nahodou i na ICQ? Jako nick *sacad* ?:-D, jestli ne, tak se ozvi: 319960895 nebo jabber djh@jabber.cz, rad pokecam. Kontaktu na reverzery tu mam malo :-)</czech> Thanks a lot for solving. I thought that this KGme is harder x)
solv3nt 08. Mar 2010	I have created a keygen using rand to generate and check not sure if it counts because of brute force?
DjH2oo7 Author 08. Mar 2010	Yes, that solution is possible too. So please send it! :>
solv3nt 08. Mar 2010	E06I-08A0-B449-1S0U-B914 I have submitted my keygen and solution, not sure how long it takes to show up. Thanks DjH :)
trustt 11. Mar 2010	My first level 2 crackme Educating :P Thank you

DjH2oo7's Try this!

Download CrackMe2.zip, 109 kb (password: crackmes.de)
Browse contents of CrackMe2.zip

You have to register this CrackMe or buy it for $1000000000. Valid solution is the key or keygen. Patching isn't allowed.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 12. Mar, 2010
Downloads: 2388

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by freesoul, published 17. mar, 2010; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

Xspider 12. Mar 2010	$1000000000 that's too much :p
DjH2oo7 Author 14. Mar 2010	Nothing yet? :X
redcoke 15. Mar 2010	this ones really fun, blows my mind but i like it
Trevil 18. Mar 2010	I have keygenned it, was fun! :-)
Dooms_day 08. May 2010	2 second trial haha! i freaking love it! all crackmes should be this design
Sevada11 01. Jul 2010	is there anyone that can help me out with this. i am a beginer and i need help. thank you
bmwlim 07. Jul 2010	2 second trial !!!! what.....
DjH2oo7 Author 09. Jul 2010	I please everyone - please, register it, I haven't any money :-(
brangelito 09. Jul 2010	Give me paypal account and I'll pay. ;)
madmaurice 11. Jul 2010	i dont get it. and i even dont get how freesoul found the timer functions. o.o
voila 14. Oct 2010	madmaurice: well using IDA Pro , you can search for function "settimer" in "function window" of IDA PRO :)
mem0rex 20. Jan 2011	I patched the 2 second thing but I have no Idea what to do next :(

DJUK@'s Crackme by DJUKA & ZEGGY

Download Crackme_by_DJUKA_&_ZEGGY.zip, 9 kb (password: crackmes.de)
Browse contents of Crackme_by_DJUKA_&_ZEGGY.zip

One very easy crackme.

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: C/C++

Published: 03. May, 2006
Downloads: 797

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Solutions

Solution by mucki, published 06. oct, 2006; download (26 kb), password: crackmes.de or browse.

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Discussion and comments

DLAP's Crackme#1

Download my_crackmes.zip, 947 b (password: crackmes.de)
Browse contents of my_crackmes.zip

Patch it, so that there will be a correct
message."

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: Assembler

Published: 11. Jun, 2005
Downloads: 583

Rating

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(we have only 1).

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Solutions

Solution by Stardust, published 24. jun, 2005; download (1 kb), password: crackmes.de or browse.

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Send a message to DMichael »

View profile of DMichael »

Discussion and comments

ZeroCoder 15. Jun 2005	ohhh... 1-level.. 100% for newbies
DLAP Author 18. Jun 2005	There is one mistake. When i'll uprade it, it will be really had.

DMichael's second keygenme

Download FixedSecondKeyGenMe.zip, 82 kb (password: crackmes.de)
Browse contents of FixedSecondKeyGenMe.zip

Rules:
1.keygen or valid user and serial

btw:
1.i set the buffers small so if you try to enter more chars than it can get the keygenme will be crashed(find out how max you can enter)
2.there no bad message(so if you enter bad serial it will close it self)
3.for who slove the first one there no big changes but if you take in sloving this too big respect from me
4.thanks to dreamer that help me find the bug that caused crash on some pc's

have fun

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 27. Jun, 2013
Downloads: 975

Rating

Votes: 8
Crackme is boring.

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Solutions

Solution by adwi32, published 08. jul, 2013; download (2 kb), password: crackmes.de or browse.

adwi32 has rated this crackme as nothing special.

Solution by Mr. eXoDia, published 08. jul, 2013; download (6 kb), password: crackmes.de or browse.

Mr. eXoDia has rated this crackme as nothing special.

Send a message to dnnuke »

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Discussion and comments

seVeb 29. Jun 2013	wow thats a hard one.. don't think a level 1 is appropriate :/
korsader 29. Jun 2013	Why in the name can not use letters f and g? With these characters, it is impossible to get the key (:
adwi32 08. Jul 2013	this is actually pretty easy so i dont understand you seVeb, you shouldnt give up so easy ;) !
moamer_2005 08. Jul 2013	oh bRoo xD nice
adwi32 08. Jul 2013	there is a small mistake in mr exodia solution, i wrote about that i my solution - its about lenght of serial.
SeanW 14. Dec 2013	Nice. That was fun. Thx

dnnuke's crackme 1.1

Download dn_cm1.1.zip, 201 kb (password: crackmes.de)
Browse contents of dn_cm1.1.zip

serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Dec, 2000
Downloads: 2391

Rating

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Solutions

Solution by [xorolc], published 02. dec, 2000; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

docs1s's d0cs1s v1

Download d0cs1s.zip, 27 kb (password: crackmes.de)
Browse contents of d0cs1s.zip

d0cs1s v1 is a keygenme that utilizes a md5 hash generator, rc4 and a custom algorithm using a dual sliding key system.

hints and tips

* no anti debug tricks
* md5 hash generator will create a key watch is different on every computer.

* all strings are encrypted with each other string interlaced.

* good boy message is encrypted with md5 hash.

* serial is created from user inputed name + md5 + rc4(not in this order)

don't patch. tutorial is only solution.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 16. Jul, 2010
Downloads: 159

Rating

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(we have only 1).

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to DOLEM »

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Discussion and comments

docs1s Author 16. Jul 2010	any comments would be greatly appreciated! a big hint I left out is that the serial is not the length of a md5 hash its much shorter. this is my first keygenme so please let me know if there is anything I could do differently. compiled with visual studio 2005 + msvcrt_winxp.obj.
Sh4DoVV 30. Jul 2010	Hi Friend Easy CrackMe Put BreakPoint On : 00401F21 CMP DWORD PTR SS:[ESP+14],EDI Run And Enter Name And Fake Serial For Correct Serial Write Down Value In EDI Register And Change Hex Value To Decimal With Calculator Of Your Windows And Enjoy
freesoul 18. Aug 2010	Hmm... I think you got bugs on your crackme. Serial isn't created by name, md5 and rc4 The serial is created by the last letter of the name, a stack offset and a multiply operation, lol 00401EE5 \|. 8D7C3C 6C \|LEA EDI,DWORD PTR SS:[ESP+EDI+6C] valour = ESP (SS) -> Stack offset + EDI (last character of name) + 0x6EC Then multiplied by 0x20618 00401F1B \|. 69FF 18060200 IMUL EDI,EDI,20618 and compared to the integer we entered 00401F21 \|. 397C24 14 CMP DWORD PTR SS:[ESP+14],EDI Repair your crackme pls :D

DOLEM's DOLEM CrackMe #01

Download DOLEM_#01.zip, 7 kb (password: crackmes.de)
Browse contents of DOLEM_#01.zip

Hi, crackers!
We are the Team DOLEM, from Italy (sorry for bad English...)!
We put all of us in this CrackMe, so we want to know if it's good or bad...

Rules:
Create keygen

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 30. Jan, 2011
Downloads: 400

Rating

Waiting for at least 3 votes
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Solutions

Solution by Zephy, published 04. mar, 2011; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

promix17 31. Jan 2011	Is selfkeygen a soluution?
DoDhLo 31. Jan 2011	Nice gui , Take me 10 min to find editboxes :)
Zephy 18. Feb 2011	Uff, this keygen algo in cme was nightmares any days for me, but solved, nice work guys, thanks :-)))
DOLEM Author 24. Feb 2011	:) We worked to create a valid keygen uh.. I feel these comments are good :)
DOLEM Author 04. Mar 2011	Nice work Zephy, your solution is detailed action by action! We like your greetings to us. Keygen works good...
Zephy 04. Mar 2011	Thanks :-) ...a lot of time i don't see inwardness of chardec function. That was the main problem :-)

DOLEM's Strange KeygenMe

Download pkgen.zip, 616 kb (password: crackmes.de)
Browse contents of pkgen.zip

This keygenme requires all the brain.
But it's simple, if you look up well the code.

NOTE: This keygenMe runs on command prompt.

Rules:

1) Write a valid keygen
2) (optional) Tell us which programming language we used to write the CrackMe.

(Sorry for bad English)
DOLEM

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 04. Mar, 2011
Downloads: 356

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Solutions

Solution by Zephy, published 23. mar, 2011; download (16 kb), password: crackmes.de or browse.

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Discussion and comments

Zephy 05. Mar 2011	ufff, after 8 hours i have a valid serial number for my nick :-)
DOLEM Author 05. Mar 2011	We're proud of that time :)
Zephy 05. Mar 2011	Most of the time i try decrypt mmcache...
DOLEM Author 05. Mar 2011	MMCache algorithm is only one of our best... But we'll try to make it harder...
Zephy 06. Mar 2011	...send tut+kg ;-)
DOLEM Author 06. Mar 2011	Ok, we'll check it :)
DOLEM Author 24. Mar 2011	Fantastic soltion, Zephy :)
Zephy 25. Mar 2011	2 DOLEM: Thanks, I sweat with this crme :-)))
DOLEM Author 26. Mar 2011	Thanks a lot :)

DOLEM's Strange KeygenMe #02

Download pkgen2.zip, 617 kb (password: crackmes.de)
Browse contents of pkgen2.zip

Hi!
This second version, isn't so easy as the first.
There are some changes.
Format of serial number is different and algorithm is harder :)

Rules:
1) Create valid keygen
2) Do not patch
3) Use brain :)

DOLEM

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 07. Apr, 2011
Downloads: 323

Rating

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(we have only 1).

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to DoomsDay »

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Discussion and comments

Zephy 10. Apr 2011	Hi squirrel, valid serial number i have 5 min. after download cme :-) ...now keygen, this is harder :-/ :-)))
DOLEM Author 10. Apr 2011	Your message was sent to squirrel and he says: - That's what I've expected xD
DOLEM Author 23. Apr 2011	Hey! Is there anybody that can solve this?? :)
Zephy 29. Apr 2011	Hi DOLEM, when i have after exams i see at this.
DOLEM Author 30. Apr 2011	No problem ;) We're waiting for solutions made by anyone :)
darkoman 01. May 2011	looks like php script encoded and compiled by bambalam compiler. Was trying to find decoder or sth like that. Hard one for me.
DOLEM Author 08. Mar 2012	@darkoman there is no decrypter on the net; you can ever try :)

The submission of solutions is closed.

Discussion and comments

ap0x 21. Jul 2005	Very nice crackme ... If you are a beginner, this is a "must solve yourself" ... Nice job DolphVS
DolphVS Author 21. Jul 2005	Thank you very much for this nice compliment.
DeepBlue 23. Jul 2005	@apox. The Id has to be greater than 6. The ID doesnt have to have more than 6 chars ;). Try 7. It works
ap0x 23. Jul 2005	I will quote myself "As you can see ID is compared with 6, and this means that serial must be longer than 6 chars." ... It can be long 6 or more chars acording to JNB komand.
ap0x 23. Jul 2005	and another quote "So this means that correct serial for ID 444444 will be 691110432... " ... Six chars for ID!
DeepBlue 23. Jul 2005	Sorry, I missunderstood that, because u used an ID which is 6 chars long. I tested the Crackme with the ID : 12 and it worked.
ap0x 23. Jul 2005	That is ok ... English is not my native language, so i miss used longer for greater :)
HaBiB 08. Aug 2005	wasn't a challenge for me but it is great for newbies well done dolphvs
DolphVS Author 12. Aug 2005	^^Thank you. It was made for newbies.
konstAnt 15. Aug 2005	Well I'll also try it. Seeing so much comments I am excited.
aae58 05. May 2012	hi, how can i find for example access denied in olly?

DoomsDay's ReverseMe - Find the password v1

Download ReverseMe_v1.zip, 2 kb (password: crackmes.de)
Browse contents of ReverseMe_v1.zip

Should be OK, takes time (bruteforcing is not suggested ;D).
The reversed algorithms combined would reveal the password.

~ Make sure to check the ReadMe for solution requirements ~

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 24. Mar, 2009
Downloads: 526

Rating

Votes: 4
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by andrewl.us, published 03. apr, 2009; download (5 kb), password: crackmes.de or browse.

andrewl.us has rated this crackme as awesome.

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Discussion and comments

kao 24. Mar 2009	Really nice code! :)
andrewl.us Moderator 24. Mar 2009	indeed, one of the few console crackmes I've seen without a runtime
simonzack Moderator 25. Mar 2009	jesus christ... just HOW can that small loop be a plus function??????? O.O
DoomsDay Author 25. Mar 2009	I'm glad you like it :) @simonzack: Better start reversing - you'll have to explain that x)
simonzack Moderator 25. Mar 2009	i did finish this one cause it interested me greatly--used some logic functions like another crackme :) i had no idea it was arithmetic and i just didn't notice the carry with 'and' maybe i'll finish tut once my main computer is fixed
Coderess 25. Mar 2009	Remarkable code!
andrewl.us Moderator 26. Mar 2009	(comment removed) shellwolf: please do not post solutions to crackmes in the comments

DoomsDay's ReverseMe - Find the password v2

Download ReverseMe_v2.zip, 2 kb (password: crackmes.de)
Browse contents of ReverseMe_v2.zip

Should be OK, will take a while to analyze.

The length of the password is 16 characters.

~ Make sure to check the ReadMe for solution requirements ~

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 18. Apr, 2009
Downloads: 435

Rating

Waiting for at least 3 votes
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Solutions

Solution by simonzack, published 21. apr, 2009; download (5 kb), password: crackmes.de or browse.

simonzack has rated this crackme as nothing special.

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Discussion and comments

geeko 16. Apr 2009	"Press any key to continue" ?!?! only works with ENTER
indomit 16. Apr 2009	Can't fully understand this logic, but found the key! :)
kao 16. Apr 2009	Due to some coding errors, there are 74449344 valid passwords. And it can be easily bruteforced. :( That's a shame because otherwise it could have been a damn nice crackme...
DoomsDay Author 16. Apr 2009	I've uploaded a fixed version. Unless I missed something out, there should be no more exploits.
simonzack Moderator 17. Apr 2009	I think it still can be easily bruteforced, but anyway I'll analyze the whole thing
simonzack Moderator 17. Apr 2009	took 10 minutes of guessing to find it out x.x now need to analyze it
kao 17. Apr 2009	@simonzack: when you write a tutorial, please tell us how you managed to guess the key in 10 minutes, I'm very curious.. ;)
DoomsDay Author 17. Apr 2009	I will attempt to fix the fault caused by my algebra and misuse of my macros (A final version will be uploaded shortly). I'm deeply sorry for the inconvenience =\; I guess my calculations were wrong.
cyclops Moderator 18. Apr 2009	Crackme updated : 18 APRIL 2009
r-Evolution 31. Aug 2010	patching the program was easy but reversing it was the hard part

DoomsDay's ReverseMe v3 - KeygenMe

Download ReverseMe_v3.zip, 4 kb (password: crackmes.de)
Browse contents of ReverseMe_v3.zip

I guess its time to get you guys *some* work :)
Details inside.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 25. Apr, 2009
Downloads: 520

Rating

Votes: 4
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

DoomsDay Author 26. Apr 2009	Does anyone have any leads?
Zerith 27. Apr 2009	If you enter nothing for the user id you get the win message :)
DoomsDay Author 27. Apr 2009	Apparently, but for the wrong reasons x) I forgot to force EAX to a different value in case the lengths do not match.
Zerith 28. Apr 2009	ARGH! you convert the user to binary, and then comes a decryption or whatever routine for the key which is awfully gigantic and i can't be bothered checking it.
DoomsDay Author 30. Apr 2009	Just out of curiosity... Is there anyone that is still working on this one?
kao 30. Apr 2009	It's not much different from your previous crackmes, so the "entertainment factor" is quite low... ;) I'll play with it when I have some free time but most probably will not write a full solution.
DoomsDay Author 30. Apr 2009	Fair enough; I think you'd like the division =)
cobrasniper555 16. Jun 2009	Okay...I'll say it now. DoomsDay, you've made a scary crackme. Haha. I looked at the algo and almost went running for the hills. But I soon just decided to copy mnemonics straight out of the disassembly, change addresses and inputs, and throw it into my own keygen template. It creates valid serials now... Frightening crackme from a quick glance but it was a little easy to solve. Keep it up though, I almost gave up after one second! =D
DoomsDay Author 25. Jun 2009	I'm glad to see you made it through :)

doomsweek's d00msweek's CrackMe 1

Download d00m1.zip, 3 kb (password: crackmes.de)
Browse contents of d00m1.zip

Visual Basic CrackMe

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 14. Nov, 2003
Downloads: 1594

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Send a message to DouBle_Zer0 »

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Solutions

Solution by draww, published 14. jan, 2011; download (3 kb), password: crackmes.de or browse.

draww has rated this crackme as nothing special.

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Discussion and comments

Vallani 14. Jan 2011	Hi DouBle_Zer0 Your TLS Callback method seems to be uncomplete at the beginning. I would say the message "Debugger Found" can't be displayed as it is now.

D!PSW!TCH's Crackme #1

Download Crackme_Number_one_V1.1.zip, 209 kb (password: crackmes.de)
Browse contents of Crackme_Number_one_V1.1.zip

Written in Borland Delphi 7
write a Keygen
don't use the crackme as a keygen
at least find a Valid Name/Serial Combination

Have fun

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 18. Apr, 2009
Downloads: 569

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by yudi, published 28. jun, 2009; download (1127 kb), password: crackmes.de or browse.

yudi has not rated this crackme yet.

Send a message to dr.c0der »

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Discussion and comments

ChupaChu 11. Apr 2009	Simple loop and coding, nice to beginers. Keep up the good work!
D!PSW!TCH Author 21. Apr 2009	Since it's so easy and boring, why isn't any1 writing a tut for the newbies? Or post a keygen? I think this would help the beginners to understand simple things first.
deskyet 02. Jul 2009	thanks, made a keygen.. but i am just to lazy and to un-experienced to make a good tutorial.
Horatio 04. Jul 2009	For the beginner - not boring at all. Thank you.

dr.c0der's CrackMe Level #1

Download CrackMe_-__Level_1.zip, 11 kb (password: crackmes.de)
Browse contents of CrackMe_-__Level_1.zip

Very is to Crack :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 10. Feb, 2009
Downloads: 1490

Rating

Votes: 8
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by T.0.R.N.A.D.0., published 06. mar, 2009; download (2 kb), password: crackmes.de or browse.

T.0.R.N.A.D.0. has rated this crackme as boring crap.

Solution by Labba, published 18. feb, 2009; download (1004 b), password: crackmes.de or browse.

Labba has not rated this crackme yet.

Solution by Aurane, published 18. feb, 2009; download (746 b), password: crackmes.de or browse.

Aurane has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

Kurapica 19. Feb 2009	indomit : you seem serious about keygens !! so why not try my CrackME ?
mazuki 02. Mar 2009	this one is far more fun if you don't use reflector and keygen it, after all it is a CRACKme
T.0.R.N.A.D.0. 06. Mar 2009	It was tooooooo easy !!
DOLEM 27. Mar 2011	Tooooooooooooooooooooooooooo easy to crack...

dr.dmoon's dmoon's keygenme 2

Download keygen_2_by_dmoon.zip, 284 kb (password: crackmes.de)
Browse contents of keygen_2_by_dmoon.zip

ABOUT:
Hi all. It's my second keygenme, i think it's hard for newbies
Easy to fishing, but hard to keygened it, i think :)
I hope it likes you, and you enjoyed to solve it.

RULES:
1. Make keygen if you can, if it very hard for you, make brute :)
2. NO PATHING

Good luck and have fun.
Russia 2009.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 26. Sep, 2009
Downloads: 595

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by Numernia, published 03. oct, 2009; download (79 kb), password: crackmes.de or browse.

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Discussion and comments

dr.dmoon Author 29. Sep 2009	Any problems ? :)
D-Jester 02. Oct 2009	Next time, no music please.
Numernia Moderator 03. Oct 2009	This keygenme is interesting, and D-Jester, just patch away the music while reversing.
dr.dmoon Author 03. Oct 2009	thx Numernia, good solution, i know, you did it for small several hours
jvwarrior 13. Oct 2009	NO PATHING? LAWLZ
Kmoinuddin 16. Oct 2009	hay if any body is there i want to know for which software i need to write a key generator
DigitalAcid 17. Oct 2009	Lol ? (some more crap wich you shouldn't read, but you're reading it anyway (because short comments aren't allowed, booooooooo)). (I hope this comment was long enough, eventough it was only to say "lol").

dr.dmoon's KeygenMe#1_by_dmoon

Download Keygenme#1_by_dmoon.zip, 92 kb (password: crackmes.de)
Browse contents of Keygenme#1_by_dmoon.zip

Hi that is my first crackme i hope you enjoy....

MODERATOR NOTE: can't identify packer, if it is commercial, please send PM
MODERATOR NOTE: author claims no packer :) more interesting then, and possibly more difficult :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 09. Jul, 2009
Downloads: 669

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by tamaroth, published 14. jul, 2009; download (65 kb), password: crackmes.de or browse.

tamaroth has not rated this crackme yet.

Solution by Holy, published 14. jul, 2009; download (24 kb), password: crackmes.de or browse.

Holy has not rated this crackme yet.

Send a message to Dr.XJ »

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Discussion and comments

wantondamage 09. Jul 2009	ASPack 1.02b or 1.08.03 * i think thats what its packed with
dr.dmoon Author 09. Jul 2009	dont believe to analyzers, good luck
The So;X 09. Jul 2009	ASPack 1.02b or 1.08.03 , Scanned with CFF explorer...
the hoax 09. Jul 2009	Doesn't matter(except for the rules). The crypter/packer is easily bypassed by hand, and the serial routine is very simple
Holy 09. Jul 2009	Medium difficult :P Solution + Keygen + Keygen source code uploaded.
dr.dmoon Author 09. Jul 2009	thx i hope you enjoy :)
Unregistered ! 13. Jul 2009	Hello, i found some bugs :D - Fish the serial with your name (easy to fishing serial) - Try with keygen me we got message "WOW, you did it Congratz, you good Cracker :)" - Try again with your name & serial, you got "Serial not correct. Try harder." :( Its a small bug, cause you forgot to reset the variable
tamaroth Moderator 14. Jul 2009	There's a bug with conversion from digest: 1A 31 07 10 A4 14 FB 27 F4 7E 52 C8 B9 CE D9 DF this sample digest is converted to: 1007311A27FB14A4C8527EF4DFD9CEB9 while it should be converted to: 107311A27FB14A4C8527EF4DFD9CEB9 sample name: "enter name ..." without quotes. except that, bug with not cleaning variables every try and therefore you can check for correct password only once after launch
dr.dmoon Author 14. Jul 2009	i'am sorry, for this bug.. that is my first kgnme
tamaroth Moderator 14. Jul 2009	Yeah, don't worry. this info will help you make better ones in future :) submitting my solution as well

Dr.XJ's Dr.XJ Keygen This #1

Download Dr.XJ_Keygen_Me_#1.zip, 39 kb (password: crackmes.de)
Browse contents of Dr.XJ_Keygen_Me_#1.zip

Hi
This Is My First Keygen Me
I Don't Know How Difficulte it is but i'm sure it's Hard
Can You Keygen this?
So Try >;)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Unspecified/other

Published: 16. Feb, 2006
Downloads: 739

Rating

Votes: 3
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by l0calh0st, published 28. feb, 2006; download (9 kb), password: crackmes.de or browse.

l0calh0st has rated this crackme as quite nice.

Solution by Ank83, published 24. feb, 2006; download (103 kb), password: crackmes.de or browse.

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Send a message to dr. animadei »

View profile of dr. animadei »

Discussion and comments

Scortile 16. Feb 2006	Language is VB. You might want to add that to your description. If I knew that in advance, I wouldn't have downloaded it. Hate VB, probably like so many others out there :) -Scortile
Dr.XJ Author 26. Feb 2006	OK! There Is A Solution It's OK Keygen Works Fine, But ... This is not what i want i want a keygenerator with all code not codes that turn my keygen this into a self keygen but it's nice Thanks anybody can keygen this With a thing All You Coded?
l0calh0st 27. Feb 2006	Solved the keygen ;) Here it is..will write tut later http://rapidshare.de/files/14229087/Keygen.rar.html Thanks for this keyme :)

dr. animadei's act-1

Download act_1.zip, 391 b (password: crackmes.de)
Browse contents of act_1.zip

serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Sep, 2000
Downloads: 3003

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by EOD, published 17. jul, 2004; download (70 kb), password: crackmes.de or browse.

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Solution by RElf, published 14. jul, 2004; download (17 kb), password: crackmes.de or browse.

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Send a message to Drakenza »

View profile of Drakenza »

Drakenza Author 12. Aug 2008	TiGa changed the difficulty from level 3 to 5, because I realized that the algorithm was too hard for lvl 3 and it probably wouldn't get any solutions. Enjoy! I hope it is not too easy ;)
simonzack Moderator 26. Jan 2009	Is this crackme possible for every name? or I think there must be a fake algo What I've currently found is 3 compares against the serial, then another algo with compare against name in modified sha-1 form. However these 2 conditions might not always satisfy each other Have I done something wrong? People who have solved this please help me a bit
simonzack Moderator 13. May 2009	ahh that was strange I always thought every username had a pass thanks for tut

Drakenza's Crackme 1 -- Senfina

Download Senfina.zip, 7 kb (password: crackmes.de)
Browse contents of Senfina.zip

CRACKME NAME: Senfina
DIFFICULTY: 6/10: Only pros should attempt
CODED BY: Drakenza
-------------------------------------------

===== EXPLANATION =====
This is my first crackme submission, so forgive me of a few things:
I'm not sure how good the people are at cracking. This crackme is very very hard to me, but may be extremely easy for others, or even harder for some. Thus it is difficult to rate the difficulty. I call it Hard, for professionals only, but this may be inaccurate, so leave feedback and let me know what you think on this.
As for the name, it's Esperanto for Without End, because the algorithm is very very long, as you will soon find!

===== RULES =====
Ok, this crackme is written in Microsoft C#, so it's very very easy to decompile, and crackmes.de rules forbid me from using packers. So, that in mind, these are the rules:
1. No decompiling the crackme in any way other than disassembly, etc. You are not permitted to extract source code from this crackme or browse its resources, etc. Only debugging.
2. No patching, jump patching, etc.
3. Bruteforcing is allowed, but only if it's really necessary and you can prove you had no other option.

===== OBJECTIVE =====
Reverse the crackme and figure the algorithm, then write a valid and working keygen. Then write a tutorial and upload it here!

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: .NET

Published: 12. Jun, 2007
Downloads: 548

Rating

Votes: 5
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

sd333221 12. Jun 2007	Cracking a .NET application without a .NET decompiler is not only no fun and not realistic (everyone would decompile a .NET application) but also very very hard because it runs on a virtual machine. I don't think you will recieve a solution =)
Drakenza Author 12. Jun 2007	Not true, there are debuggers that can handle .NET, without necessarily decompiling it. I'm not going to give away too much, but consider this: OllyDbg will certainly not work, so those of you who use it or something similar will have to get out of your comfort zone. Also, technically it's not against the rules to "decompile" it if you're not seeing the actual .NET source (what is debugging but decompiling to ASM?) :) And if it's really not possible, write a solution explaining why, and it'll probably get approved. Keep trying, people. If no-one can do it for the next couple of weeks, I might upload a vb6 version (though that will be extremely easy :P)
EvOlUtIoN 12. Jun 2007	we only can use PEBrowse as debugger, it is the only doable solution
Drakenza Author 13. Jun 2007	I looked over PEBrowse and it reverses .NET programs to assembly, not .NET, therefore it is not against the rules :) That wasn't what I was thinking of at all, EvOlUtIoN, good find! I think that should help you greatly!
kidmuncher 14. Jun 2007	I have reversed your crackme with .NET Reflector . Ok it's forbiden... But now, i realy think that your crackme is impossible to solve ! The second test called 'Leetcheck' seems incompatible with the Serial Key ...
costy 15. Jul 2008	@moderators This is a NET application. Not Visual Basic ;-D
MACH4 15. Jul 2008	Just seen this one! Dunno obout anyone else but crackers being crackers, first thing was to decompile it! suppose I'm disqualified already! lol.
sYnfo 15. Jul 2008	And what about IDA by the way? It handles .NET MSIL too... I know it's more like a disassembler, than debugger, but... :)
dittirik 27. Nov 2015	Username : 10000000000 Serial : DIAVORTO-8076F-79465-7D992-5469P-DV-YCW www.TurkishCode.com

Drakenza's Virulent

Download Virulent.zip, 441 kb (password: crackmes.de)
Browse contents of Virulent.zip

Virulent - by Drakenza

What makes this crackme interesting is the fact that it "mutates." It breaks off a thread that randomly switches between a number of algorithms. Because of this, a traditional keygen won't work.

What you have to do is analyze the crackme and its libraries, and write a loader/trainer that modifies the crackme in memory and disables the mutation mechanism in some way. Then write a keygen for the current algorithm scheme. Not too difficult ;)

-------------------------

RULES:

Patching is allowed with the following restrictions:
- No patches that modify any algorithm(s).
- No patches that modify the validation routine(s). This means, no patches to make it accept all serials, etc.
- No jump patching, unless it's absolutely necessary for your keygen.
- Absolutely NO self-keygens. It will seem very tempting, but DON'T.

Any patching must be related to the mutation scheme, nothing else!

Any patches that you require must be done through a loader/trainer (you can't patch the executable or DLLs directly).

ABSOLUTELY NO BRUTEFORCING.

-------------------------

One last note: You may NOT link the DLLs in your keygen. You must reverse the algorithms yourself!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 17. Aug, 2008
Downloads: 617

Rating

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Solutions

Solution by cyclops, published 27. aug, 2008; download (486 kb), password: crackmes.de or browse.

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Discussion and comments

ARCHANGEL 20. Aug 2008	Actually, I didn't understand what the author wanted to say: you can't patch the executable or DLLs directly Can I patch it using WriteProcessMemory or ZwWriteProcessMemory?
zairon Moderator 20. Aug 2008	He was referring to a physical patch, runtime patch is ok.

draww's DA KeygenMe #1

Download DAKeygenMe1.zip, 6 kb (password: crackmes.de)
Browse contents of DAKeygenMe1.zip

Rules:

1) No patching.
2) Only valid solution is a KEYGEN and TUTORIAL.
3) You can use any tool you want (Reflector, ILDasm, etc.).

Hint: Do not post ID+KEY combinations on comments as they'll not work on other machines ;(

I hope you like it ;)

Best regards,
DrAww AliEn

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 22. Apr, 2015
Downloads: 170

Rating

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Solutions

Solution by Cubinator, published 17. may, 2015; download (750 kb), password: crackmes.de or browse.

Cubinator has rated this crackme as quite nice.

Solution by Matteo, published 17. may, 2015; download (88 kb), password: crackmes.de or browse.

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Discussion and comments

draww Author 05. May 2015	Anyone tried this? Finding ID is very simple. And the key check algo is reversible. Good luck!
Matteo 05. May 2015	downloaded today, solved :) i will send id+key in private message although you can decompile with any .net decompiler it wasn't easy
draww Author 09. May 2015	well done Matteo. hope you enjoyed solving it ;)
Cubinator 15. May 2015	Solved :) Nice one. Just uploaded my solution and waiting for approvement.
draww Author 17. May 2015	another well done to you Cubinator. waiting for your tuts ;)
metacube 20. Jul, 02:46	This is the nice one. I have broken my head, because for a long time i could not make it work, but thought that i did right. Then i surprisingly realised, that syskey() function gives different results during debugging. Namely, for my PC Environment.OSVersion property returns different result while debugging. It seems strange for me, is it ok?
draww Author 22. Jul, 13:15	metacube I can't know your debugging environment but it may change things on the fly. there are no anti-debug tricks though..

draww's DA KeygenMe #2

Download DAKeygenMe2.zip, 5 kb (password: crackmes.de)
Browse contents of DAKeygenMe2.zip

Make it say "Registered"

Rules:

1) No patching.
2) Only valid solution is a KEYGEN and TUTORIAL.
3) You can use any tool you want (Reflector, ILDasm, etc.).

Notes: Do not post serials or solutions on the comments!

I hope you like it ;)

Best regards,
DrAww AliEn

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 12. Jul, 2016
Downloads: 244

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Solutions

Solution by redoC, published 25. aug, 2016; download (110 kb), password: crackmes.de or browse.

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Discussion and comments

Rune_pe 15. Jul, 16:26	Hey ! Is anyone check if this chalange is solveable ? I mean how can you make keygen, while the program uses sha512 encryption ? I saw that it use only eighth of the key, but it still 16^16 option that need to bruteforce.
draww Author 18. Jul, 01:19	Hi there. Yes you have to bruteforce some part. But it won't be a big problem. It's ulong in type but I set it to a relatively low number. Otherwise it would be impossible (or take years) to solve ;)
draww Author 25. Jul, 06:57	to anyone willing to bruteforce, the range is between 0-0xFFFFFFFFFF
dsrabot 03. Aug, 08:06	It solveable but first part you need to bruteforce number which some parts of sha512 = const. > But it won't be a big problem It's a real problem because bruteforce software can't brute by hash mask. I wrote my own bruteforce but it is so slow, I brute ~4FFFFFFF combinations and spent more than 12hrs >the range is between 0-0xFFFFFFFFFF Are you kidding ?
dsrabot 03. Aug, 08:09	Oh, sorry, I bruted 0x16CDF8ED2 (6121557714) combinations but still not found (
draww Author 04. Aug, 07:14	@dsrabot I'm not kidding, it'd be even worse LOL.. but let's make it easier.. start from 0xE000... and brute backwards ;) @redoC well done mate!
draww Author 04. Aug, 11:21	The value of ulong.MaxValue is 18,446,744,073,709,551,615; in hex 0xFFFFFFFFFFFFFFFF so 0-0xFFFFFFFFFF range is quite reasonable ;)
draww Author 04. Aug, 20:17	@dsrabot normally it can be a neat protection with some tweaks and traps :D did u read the bruteforced number in hex?
dsrabot 05. Aug, 06:22	@draww of course I read it ) I mean the optimal range is 0xFFFFFFFFF (2^36) or Dword (2^32) for brute on CPU on home machine.
luxdav 06. Sep, 20:29	I'm not that good like redoC and I don't have any computing power available but I was able to program an theoretical approach and my own keygen. I looked the magic value up in his solution. Thank you. https://github.com/LuxXx/reverse-engineering/tree/master/draww

DrDealer's BruteForce This !!

Download BruteForceThis.zip, 940 b (password: crackmes.de)
Browse contents of BruteForceThis.zip

We can do this the easy way or the hard way. How we proceed from here is up to you.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 01. Sep, 2005
Downloads: 472

Rating

Votes: 7
Crackme is nothing special.

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Solutions

Solution by morecode, published 08. apr, 2013; download (272 kb), password: crackmes.de or browse.

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Discussion and comments

lord__virus 01. Sep 2005	patch?????, Zzzzz...
DrDealer Author 01. Sep 2005	No Patching ... Here's a hint , the password does not contain :- Lowercase Letters ONLY --> a to z Uppercase Letters ONLY --> A to Z Numbers ONLY --> 0 to 9
deroko 02. Sep 2005	I like description =) "easy or hard way" =)
dimensionx777 03. Sep 2005	HI I HAVE SEEN THIS PAGE FIRST TIME AND I DOWNLOADED THE FILE BUT WHEN RUN IT ONLY APPEAR A FORM SAYING INCORRECT PASSWORD!; WHERE U PUT THE PASSWORD THEN I HAVE ONLY CHANGE THE JUMP I DONT KNOW IF THIS FINE TELL ME PLEASE
Arilou 03. Sep 2005	Koli8Fp$ This is not a short comment now ...
Arilou 03. Sep 2005	dont forget to put " before and after the password like BruteForceThis.exe "Koli8Fp$"
BieX 05. Sep 2005	Here is a full keygen..Call void BruteForce(argument) multiple times with different inputs. However, you would need to change a few things here and there to make it compatible with C++ ( I dont have VC++ here so I couldnt put the final touch into it ) void BruteForce(long Parameter1); { CP = 64bitEncryption(Parameter1, long(73h+76h+85h+94h+0ADh+0EFh+0DFh+0CBh+0DAh+75h+84h+23h+91h+0CDh+0FBh)); i = 0; C = 4; do { if (C==0) {C=4} // cl switches between 0 and 4 else if (C==4) {C=0} ecx = (i & 1) << 2; A = i >> 1; if (signed && carry) { A += 1 } if (!signed) { param = (A + Parameter1) >> C & 15; i += 1; CP[i] = param + 97; } } while(i < 15); bFail = false; I = 0; for(char = "pinemfjelaciebhk"; 1; char++) { if(char == null) { break; } if(char != CP[I]) { bFail = true; } CP += 1; I++; } if (!bfail) MessageBoxA(0, "Working Password: "+Parameter1, "BieXs Keygen", null); } long 64bitEncryption(pointer encInput, pointer memArea) { smallint bits; smallint hexVal; smallint hex2; long mem; long out2; long out; mem = memArea; out2 = (encInput + 4); out = encInput; hex2 = 0; hexVal = 0x9E3779B9; bits = 64; bits = bits + (-1); while (bits > 0) { hex2 = hex2 + hexVal; out = out + ((((out2 << 4) + mem) ^ (hex2 + out2)) ^ ((out2 >> 5) + (mem + 4))); out2 = out2 + ((((out << 4) + (mem + 8)) ^ (hex2 + out)) ^ ((out >> 5) + (mem + 12))); bits--; } encInput = out; out = encInput; (out + 4) = out2; return (out); }
Arilou 05. Sep 2005	Or you can choose the easy way and reverse the algo :D and solve it without killing you CPU
BieX 05. Sep 2005	yup yup, but that is not bruteforceing :P

DrPepUr's DrPepUr #1

Download DrPepUr_#1.zip, 6 kb (password: crackmes.de)
Browse contents of DrPepUr_#1.zip

Nothing Special

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 29. Dec, 2007
Downloads: 928

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Solutions

Solution by deurus, published 29. jul, 2010; download (18 kb), password: crackmes.de or browse.

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Discussion and comments

ReverendDave 06. Jan 2008	So I have not been able to create a keygen for this (asm is easier for me than VB for some reason), but I have been able to generate a valid key file. Would this be enough to consider it "solved" or do I need to create a keygen?
DrPepUr Author 08. Jan 2008	Yeah Man....What ever Floats Ur Boat send me a copy if you dont mind
TiGa 29. Feb 2008	Video solution by DrPepUr in the crackmes.de section of the RCE Video Portal: http://video.reverse-engineering.net/index.php?cat=16
costy 17. Jul 2008	The link isn't valid now.
Xspider 17. Jul 2008	will the whole site doesn't work :(
zairon Moderator 17. Jul 2008	[Just wait few days and you'll get all the videos again]
DigitalAcid 18. Jul 2008	Wait a second here... He made it and he breaks it, hmmm ?
Xspider 18. Jul 2008	ho's that made 'n breaks it?! He sended to who! :p
Xspider 18. Jul 2008	i mean "He" sent to who ?!

DrPepUr's DrPepUr #3 [KeyGenMe]

Download DrPepU_#3_KeyGenMe.zip, 5 kb (password: crackmes.de)
Browse contents of DrPepU_#3_KeyGenMe.zip

DrPepUr#3 KeyGenMe

Rules
1. No Patching
2. No Self-Keygens (Refer to rule #1)
3. No Fishing - Valid Name & Serial Not Valid Solution
4. Write A Tutorial If You Feel Like It

Valid Solution

1. Working Keygen
By: Dustyh1981 / DrPepUr

DrPepUr@Yahoo.com

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 10. Mar, 2008
Downloads: 801

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by kilobyte.asm, published 27. dec, 2009; download (15 kb), password: crackmes.de or browse.

kilobyte.asm has rated this crackme as quite nice.

Solution by ORacLE_nJ, published 27. dec, 2009; download (45 kb), password: crackmes.de or browse.

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Discussion and comments

kcynice 14. Mar 2008	I can re-write its algrithm,but the program cheat my ollyDbg.I hope some one would like to improve it,and mail me if him(or she) like.Thanks.
DrPepUr Author 14. Mar 2008	I do not understand what you are trying to say.
kcynice 14. Mar 2008	oh,i am sorry.I had uploaded my solution and left that comment. But I do not know why the solution has not shown by now.And I also sent a mail to you. That,my keygen only fits your program running under ollyDbg.
kcynice 14. Mar 2008	in fact,the program didn't clear the right serial string in the memory,so,i changed the original file to make in display the right serial string other then wrong message when i typed a wrong serial string but had a right format. to write a keygen,i re-wrote its algrithm.but found that the serial strings are different between running alone and running in ollyDbg. So I do not know to to resolve it.
DrPepUr Author 14. Mar 2008	I think the admins look over the solutions before they put them up, however if your keygen does not work outside of ollydbg, you need to go back in and find out why. This is not a bug in the program it is intentional.....if you still can't figure it out drop me another email and I will give you a hint.
kcynice 14. Mar 2008	my keygen work well now.but i could not update my uploaded solution now. someones needed will be welcom to mail me to gain a solution: kcynic@163.com I also is a newbie,this is my first practice. thnx DrPepUr
TiGa 15. Mar 2008	Yes, we check every keygen with a list of names outside the debugger. It would be a bad idea for people to learn from faulty solutions. Also if the keygen is not compiled, the solution is rejected automatically.
kcynice 16. Mar 2008	OK.I will update a new one with executable file again.
ORacLE_nJ 19. Dec 2009	Can you please give a hint... I found a serial for my name, but it doesnt work outside the debugger.. I saw your post & decided to ask you for a hint.. This is the key i found to be working in the debugger.. Name: Administrator S/N: B753B5-9267AD9EB161818F9 I keygenned it too.. But it doesnt work outside the debugger... And one more question, PUSH 004040D8 ; /String = "Thank You For Taking The Time To CrackMe ! ; - )" CALL <JMP.&kernel32.OutputDebugString>; \OutputDebugStringA What is the role of these lines in the keygenme?? Pls help me.. I'm a newbie..
kilobyte.asm 20. Dec 2009	google OutputDebugStringA to find out what it does, search for API references in code to find out where it is called then check the return values and see what it is stored as and then follow that value through out the program. hope that helps a little.
ORacLE_nJ 21. Dec 2009	Thanx kilobyte.asm.. :-) This is what i found from Win32Api Reference _________> The OutputDebugString function sends a string to the debugger for the current application. Return Values This function does not return a value. Remarks If the application has no debugger, the system debugger displays the string. If the application has no debugger and the system debugger is not active, OutputDebugString does nothing. <________ But in this keygenme i didnt understand how it affects the serial generation.... Hope i'm being clear..
kilobyte.asm 21. Dec 2009	step through the subroutine at 401000, after execution of OutputDebugString, something is definately returned in eax, then stored in 40445C, find references to this address constant in olly and follow the value about. Anyways outputdebugstring should return a 1 in eax in normal conditions(when not being ran under a debugger) according to the PDF I have on anti-debugging techniques.
ORacLE_nJ 23. Dec 2009	Thank you kilobyte.asm.. I have successfully keygened it... I'll definitely post my solution soon.. :-)
kilobyte.asm 23. Dec 2009	no problem, i'll post mine too when it's done.

DrPepUr's DrPepUr #4

Download DrPepUr_#4_KeyGenMe.zip, 6 kb (password: crackmes.de)
Browse contents of DrPepUr_#4_KeyGenMe.zip

Rules
1. No Patching
2. No Self-Keygens (Refer to rule #1)
3. Write A Tutorial If You Feel Like It

Good Luck

DrPepUR

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 16. Mar, 2008
Downloads: 760

Rating

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Solutions

Solution by ORacLE_nJ, published 25. apr, 2010; download (77 kb), password: crackmes.de or browse.

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Discussion and comments

kcynice 24. Mar 2008	I tried for a whole day,but I am failed to get the first 4 characters of the serial string. At 00401AF2: call 00401910. It seems like xor encryption. I had enumerate all the possible characters from '0' to 'z'(of course for every character),its strange that i failed too. There are a sequence of call for 00401910,the complexity upgrades! Any advice? Thanks.
DrPepUr Author 24. Mar 2008	The first 4 bytes are used to make a CRC32 checksum, the easiest way to find them out is by coding a CRC32 brute forcer.
kcynice 24. Mar 2008	I don't know how to write the reverse function and get the original 4 bytes,but i have got it by enumeration,its "DRP-". Your program is very good to practise. I have done all the work. the same issue is my keygen is only can work in debugger. I guess the magic exists at [0040320F],perhaps you use a newer anti-debug tech than last one(#3). I am missed myself this time.btw,i don't to how to code a CRC32 brute forcer.
kcynice 24. Mar 2008	i enumerated all the printable characters no longer than only at '0' to 'z' range.So fortunately!
kcynice 25. Mar 2008	the last issue is its anti-debug stratage,i have not resolved it by now. .......

DrPepUr's DrPepUr #5

Download DrPepUr5.zip, 14 kb (password: crackmes.de)
Browse contents of DrPepUr5.zip

There are no rules all solutions ar valid as long as it runs registered and all options are unlocked. Patch, Keygen, Loader, Bruteforce just whatever you gotta do.

Good Luck,

Dustyh1981

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 04. Apr, 2008
Downloads: 799

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by DigitalAcid, published 09. jun, 2008; download (130 kb), password: crackmes.de or browse.

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Solution by costy, published 27. apr, 2008; download (225 kb), password: crackmes.de or browse.

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Discussion and comments

yaleond 07. Apr 2008	if serial.length == 1 success! if serial.length == 2 the app cant open!
DrPepUr Author 07. Apr 2008	That is a bug in the program, It says registered but no options are unlocked, still shows unregistered in the about box.
yudi 18. Apr 2008	i get the right result, but there is a bug ! first run eax=0 then second run eax=0A registered !!! three checks : 1.bp 00401316 don`t patched at first run !!! 2.bp 004011FB 3.bp 0040128E after second run patched the pro and enabled all function! after saving the pro will not run at all !!! * bug*
DigitalAcid 18. Apr 2008	Well, if you patched and saved to file, it will be patched at first run =). Maybe a loader would work.
DrPepUr Author 19. Apr 2008	If you patch it correctly it will run.......Hint....There is an CRC check
costy 26. Apr 2008	I submitted a solution I hope it will be accepted. The crackme copy itself in the TEMP directory and the executes its copy with ShellExecuteA. The copy does the crc check so just remove the call to ShellExecuteA.
DrPepUr Author 28. Apr 2008	@costy: I looked over your solution, there are much easier ways to do it. But you missed a few things, na valid license type is shown,"[Registered]" was not one of them. The check-boxes have been enabled but not checked. Instead of using a resource editor to enable them, you should have found where and how, and why they were enabled. If this were a "real" app making cosmetic changes would be simply that....You would have the look, but functions maybe even hidden functions would not be enabled. As for your question about making changes directly from olly all you have to do it hit the spacebar where you want to assemble, make your changes right click and copy to executable. It is much easier than a hex editor.
costy 13. May 2008	OK I had a look. I understood that this routine enables and check the checkboxes. I have to execute this one to check the boxes. And I made some changes to it becouse it doesn't work correctly for same reason. I could check all checkboxes with resource editor but you are right this is a better way. 004045B1 /$ 55 PUSH EBP 004045B2 \|. 8BEC MOV EBP,ESP 004045B4 \|. 837D 0C 01 CMP DWORD PTR SS:[EBP+C],1 004045B8 \|. 73 02 JNB SHORT DrPepUr5.004045BC 004045BA \|. EB 41 JMP SHORT DrPepUr5.004045FD 004045BC \|> C745 10 BC0200>MOV DWORD PTR SS:[EBP+10],2BC 004045C3 \|. BF 00000000 MOV EDI,0 004045C8 \|> FF75 10 /PUSH DWORD PTR SS:[EBP+10] ; /ControlID 004045CB \|. FF75 08 \|PUSH DWORD PTR SS:[EBP+8] ; \|hWnd 004045CE \|. E8 7D010000 \|CALL <JMP.&user32.GetDlgItem> ; \GetDlgItem 004045D3 \|. A3 C0734000 \|MOV DWORD PTR DS:[4073C0],EAX 004045D8 \|. 6A 00 \|PUSH 0 ; /lParam = 0 004045DA \|. 6A 01 \|PUSH 1 ; \|wParam = 1 004045DC \|. 68 F1000000 \|PUSH 0F1 ; \|Message = BM_SETCHECK 004045E1 \|. 50 \|PUSH EAX ; \|hWnd 004045E2 \|. E8 8D010000 \|CALL <JMP.&user32.SendMessageA> ; \SendMessageA 004045E7 \|. A1 C0734000 \|MOV EAX,DWORD PTR DS:[4073C0] 004045EC \|. 6A 01 \|PUSH 1 ; /Enable = TRUE 004045EE \|. 50 \|PUSH EAX ; \|hWnd => NULL 004045EF \|. E8 50010000 \|CALL <JMP.&user32.EnableWindow> ; \EnableWindow 004045F4 \|. FF45 10 \|INC DWORD PTR SS:[EBP+10] 004045F7 \|. 47 \|INC EDI 004045F8 \|. 3B7D 0C \|CMP EDI,DWORD PTR SS:[EBP+C] 004045FB \|.^75 CB \JNZ SHORT DrPepUr5.004045C8 004045FD \|> C9 LEAVE 004045FE \. C2 0C00 RETN 0C
DigitalAcid 19. May 2008	I looked at this crackme again, and i think there are several License Types. I only found 1 so far. I patched it with Olly and got a Newbie License and only 2 checkboxes that were enabled :). I will try some more, but this is a hard one without patching, imo.
DigitalAcid 03. Jun 2008	I found a valid key for the Newbie License :P. I tried reversing the algorithm, but it's not so easy, at least not for me. Quite nice algorithm ;). It's a shame this one isn't keygenned yet. If I could, I would do it =).
DigitalAcid 10. Jun 2008	Updated my solution. It includes a short overview on how to reverse the algorithm and has valid keys for all License Types.

DrPepUr's DrPepUr #6

Download DrPepUr_6.zip, 5 kb (password: crackmes.de)
Browse contents of DrPepUr_6.zip

I worked on a target with this algo when a little after I started reversing. It gave me a hard time fishing a serial so I just patched it and went about my way. I have this thing of going back to old targets and finding new solutions. Anyway recently keygenning has peaked my interests so I brought out PROGRAMX to see if I could keygen it. I couldnt belive how simple it was. It was right there smacking me in the face, anyway thought it would be a good exercise.. So I ripped the algo and modified a couple things and I leave you with this. No Anti, no other b/s just straight code.

Enjoy,

DrPepUR

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 27. Apr, 2008
Downloads: 776

Rating

Votes: 4
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Solutions

Solution by Jesi, published 21. may, 2008; download (63 kb), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 20. May 2008	Come on, this one is easy to fish. Somebody should be able to keygen this baby ;).
Jesi 21. May 2008	I keygen it, but my solution to this crackme is being reviewed by moderators since last saturday.

DrPepUr's [KeyGenMe] DrPepUr #2

Download DrPepUr_#2.zip, 4 kb (password: crackmes.de)
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:..
I am just a beginner in ASM and just wrote this to help me learn a little more about it
Happy Cracking

Dustyh1981 / DrPepUr

~Rules :..

No Patching
Write A Keygen
Write Tutorial

DrPepUr@Yahoo.com

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 15. Feb, 2008
Downloads: 929

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Solutions

Solution by 0xdie, published 22. feb, 2008; download (24 kb), password: crackmes.de or browse.

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Discussion and comments

cosmos 23. Feb 2008	How can i find out the string from the hash ?, Is there any tool ?
DrPepUr Author 23. Feb 2008	You have to bruteforce it, u can code up a little program in ASM
cosmos 23. Feb 2008	Thanks DrPepUr, i was looking for other ways than bruteforcing. I've tried some tools such as MDcrack but no way. Seems i need to create a crc32 bruteforcer.
revergger 25. Aug, 23:20	i'm sorry , its been more that 7 years since the last solution was sent, but.. how did you realize about the crc32 algorithm ? i mean , how did you know that it was a crc32 and wasnt another simple rutine written by the autor?

DrSpliff's drscm1

Download drscm1.tar.gz, 3 kb

This crackme uses the basic principals and building blocks of software protection on Unix systems with a little bit of crypto thrown in to piss you off.

Difficulty: 4 - Needs special knowledge
Platform: Unix/linux etc.
Language: C/C++

Published: 16. Jan, 2005
Downloads: 999

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Solutions

Solution by mindless, published 23. oct, 2007; download (6 kb), password: crackmes.de or browse.

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Solution by Cippo, published 05. aug, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by tiocsti, published 22. feb, 2005; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

mindless 22. Oct 2007	I found this crackme today and submitted a solution. It's another way to solve it digging into the crypto stuff. Though this work is no needed as other solutions show I found it useful for a tutorial :-) Anyway I liked it :-) Cheers

DrSpliff's drscm3

Download crack.tar.gz, 12 kb

A simple application loader example aiming to provide a situation where static analysis is not possible.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 27. Jul, 2007
Downloads: 435

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Solutions

Solution by Yoha, published 14. feb, 2013; download (37 kb), password: crackmes.de or browse.

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Solution by rookie, published 30. dec, 2007; download (45 kb), password: crackmes.de or browse.

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Send a message to dr_dermatolog »

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Discussion and comments

DrSpliff Author 31. Aug 2007	Nobody has even submitted a solution yet? The aim is to analyse the encoded file after finding a valid user id. Core things you need to use: * Brute forcing (or a lucky guess) * Dynamic analysis while it's running. Bonus points for dumping the assembly of the license checking routine. Extra bonus points for writing a c.enc file generator.
rookie 30. Dec 2007	Nice one :) Not too hard, but hard enough for someone starting off reversing, like me.

dr_dermatolog's Beton&Bitum v 0.3

Download dbetonbitum5.zip, 168 kb (password: crackmes.de)
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crackme

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 06. Jul, 2003
Downloads: 1242

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Solutions

Solution by Scortile, published 06. jul, 2003; download (1 kb), password: crackmes.de or browse.

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dr_dermatolog's Beton&Bitum v 0.3 (with protection)

Download beton_bitum.zip, 169 kb (password: crackmes.de)
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crackme

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 08. Jul, 2003
Downloads: 1259

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Duelist's Crackme 1

Download due_cm1.zip, 3 kb (password: crackmes.de)
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Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 2413

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Solutions

Solution by karna, published 15. aug, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by Duncs, published 11. apr, 2004; download (5 kb), password: crackmes.de or browse.

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Solution by _pusher_, published 19. sep, 2002; download (490 b), password: crackmes.de or browse.

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Discussion and comments

Duelist's Crackme 2

Download due_cm2.zip, 4 kb (password: crackmes.de)
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Time-Trial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 2489

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Solutions

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Solutions

Solution by tomkol, published 28. apr, 2013; download (7 kb), password: crackmes.de or browse.

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Solution by luucorp, published 15. dec, 2002; download (7 kb), password: crackmes.de or browse.

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Solution by bRaiN_faKKer, published 14. dec, 2002; download (6 kb), password: crackmes.de or browse.

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XzzX 23. Apr 2008	Isn't one RDTSC enough?
Dynasty Author 27. Apr 2008	that was borrowed from someone else :P
HMX0101 28. Apr 2008	This is a level 4??? I think this one is overrated.. probably a level 1 or 2... the junk code/obfuscation isn't good enough after you know how to deal with it ;) and the anti's aren't so good (IsDebuggerPresent & EnumProcess)... its perfect for newbies ;P.. I've just solved it because of supposed level ;PP
Dynasty Author 28. Apr 2008	hmmm... I did make a note saying that i wasnt sure about the difficulty level ! that's pretty much what the ppl who tested it told me to put it up as... so i did
HMX0101 28. Apr 2008	no problem mate ;).... now, just waiting for your next one in this series :)
XzzX 28. Apr 2008	Yes serial algo is trivial and the jumps/RDTSC are just annoying. ;-) @HMX0101: How did you solve the jumps? Did you use some kind of script or did you just step it?
HMX0101 28. Apr 2008	Just put bp where do you think is a good place (intuition, maybe? ;))... stepping it one-by-one sucks.. ;P
andrewl.us Moderator 28. Apr 2008	Dynasty, I thought that the obfuscation was pretty good! But the parts that the obfuscation leads to can be seen in plain text, so they can be breakpointed without stepping through the obfuscation. If you instead decrypted the serial algorithm stuff right before executing it, we would have no choice but step through the junk to reach it. And producing the proper key file is non-trivial at first inspection. HMX0101, you can't give us more than "bp where you think is a good place" ?
HMX0101 29. Apr 2008	I've just set bp where as you says its plain text (this is a good place ;)... its simple intuition... another way can be, determinate the junk code/obfuscation pattern and write a tool/script which do the hard work for you ;)
Dynasty Author 29. Apr 2008	@andrewl.us : Thanks bro, the obfuscation is supposed to be a pain the ass. however, I'm pretty new to the whole coding thing, so I'm still having a hard time making things harder for reversers of your experience... I guess I'll do better next time! But I have to say, the good part is I learned a lot coding this thing ;)
Dynasty Author 29. Apr 2008	@andrewl.us : Awesome tut man, grazze mille and thanks also for taking the time for it ;)
andrewl.us Moderator 29. Apr 2008	:) So is it possible to produce a satisfactory file after all 12 iterations of the loop starting at 00403BF5? I think flooding >1024 bytes and making it exit early is the easy path. Perhaps someone will submit an alternative solution.
XzzX 29. Apr 2008	My approach was very similar to yours. I don't know if there is a way to do it without skipping the iterations.
HMX0101 30. Apr 2008	I've used a different approach (i never reach the 1024bytes)... but it works after you click two times?? a bug?? :S

dynsym's Crack_Me_01

Download crackme1.zip, 5 kb (password: crackmes.de)
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Level 1
Language C
Linux x86/ELF

This is an easy linux crackme. It will only print 'Solved' when certain conditions are met. Enjoy.

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 01. Apr, 2005
Downloads: 1878

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by webbi, published 11. feb, 2011; download (2 kb), password: crackmes.de or browse.

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Solution by _pNg, published 22. jul, 2006; download (45 kb), password: crackmes.de or browse.

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Solution by cli3nt, published 24. mar, 2006; download (1 kb), password: crackmes.de or browse.

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Solution by tiocsti, published 07. apr, 2005; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

Silkut 31. Mar 2007	easy crackme, but cool for rce linux beginners
webbi 15. Jan 2011	I just submitted a patch. I though that it could be useful for others to see how to patch a simple file with C.
lionaneesh 02. Feb 2011	Simple crack.. very simple..... Hint : check edi (first few lines of code) & check esi

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D-Hack's dhack.Crackme15.0

Download dhvbcm15.0.zip, 5 kb (password: crackmes.de)
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Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Aug, 2002
Downloads: 2424

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Solutions

Solution by CuTedEvil, published 25. aug, 2002; download (2 kb), password: crackmes.de or browse.

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D-Hack's dhack.Crackme16.0

Download dhvbcm16.0.zip, 4 kb (password: crackmes.de)
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CD-Check

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Aug, 2002
Downloads: 2919

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Solutions

Solution by CuTedEvil, published 25. aug, 2002; download (5 kb), password: crackmes.de or browse.

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Solution by |CraniX|, published 19. aug, 2002; download (2 kb), password: crackmes.de or browse.

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D-Hack's dhack.Crackme17.2

Download dhvbcm17.2.zip, 6 kb (password: crackmes.de)
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Scroller

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Aug, 2002
Downloads: 1965

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Solution by red477, published 29. nov, 2007; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

easternDragon Author 29. Nov 2007	OK, so I was wrong. You do not need to know any math at all. However, there is a more elegant solution than red477's. ;)

Eastern Dragon's Eastern Dragon's Keygen Me #1

Download eastern_dragon_-_keygenme_1.zip, 48 kb (password: crackmes.de)
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This keygenme will probably be too easy for someone with crypto-keygenning experience. It might be a good entry point if you are beginning to learn the art of crypto-keygenning.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 06. Sep, 2005
Downloads: 721

Rating

Votes: 3
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Solutions

Solution by m@rio_crk, published 15. sep, 2005; download (75 kb), password: crackmes.de or browse.

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Eastern Dragon's Keygen Me #2

Download keygenme2.zip, 31 kb (password: crackmes.de)
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Special knowledge is needed for this one. Without it you are lost.

I have provided you with hints that might help when you're stuck.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 12. Dec, 2005
Downloads: 4735

Rating

Votes: 7
Crackme is quite nice.

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Solutions

Solution by gome, published 17. dec, 2005; download (86 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 13. Dec 2005	for the serial calculation, look at offset 00401064 ;)
Eastern Dragon Author 13. Dec 2005	I have to disappoint you, there is no serial calculation in this keygenme. Only a serial check. It is not possible to sniff a key or make a keygenerator by ripping code.
HMX0101 13. Dec 2005	excuse me, for the inconvenient :)
kao 15. Dec 2005	nice crackme! :)
jB_ 18. Dec 2005	Very nice crackme, Eastern Dragon. I never saw such stuff in a crackme. I'll code a keygen very soon.
jB_ 18. Dec 2005	Keygen ready, the code was not really time consuming :) The algorithm is fully reversed, contrary to the solution posted by gome (nice solution though). Only on my webpage ( http://jardinezchezjb.free.fr ), as I was too lazy to write a tutorial as usual :( I promise I'll do it soon, this keygenme is worth a few pages!
Eastern Dragon Author 19. Dec 2005	@gome your solution works, but it is not beautiful. the keygenme was designed to be solvable without brute force, albeit probably not without reading Hint 3 (see About dialog). anyway, thanks for the time you took to reverse this thing and write the bruter and the tutorial. @jB thanks for your kind words. i really look up to you as a keygenner, you are one of the true masters of this art. your page with your crypto-keygens is an invaluable resource. greatly looking forward to your tutorial.

ecokey's Xeprotect

Download Crack_me.zip, 573 kb (password: crackmes.de)
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Hello all

This is a new challenge to all crackers in the world.

Its a new packer , similar to AsProtect but i hope much better and hard to crack.
Uses a new encryption system.

So if somebody gives a try here is an application for you.
The application its a simple serial tester. Its ask for a serial and if its ok gives an ok message.
Normally the application will be cracked in 2 seconds.

But its protected with the new packer.

try to find the serial, or modify the exe to accept any serial entered.

Its work only in Windows XP right now.

So , can anybody crack this ?
I am thinking about a reward for the one who manage to crack this app.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 06. Oct, 2009
Downloads: 597

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Solutions

Solution by idid231, published 09. jan, 2013; download (529 kb), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 06. Oct 2009	All this "protection" for a hardcoded serial :P ? Reconstructing an unpacked file will be hard (if not impossible) or take lots of time though.
D-Jester 06. Oct 2009	Awwww, that sucks I'm running Win7.
_pusher_ 06. Oct 2009	DigitalAcid: its not impossible.. you can easily get an original exefile :) you can even do it without executing it, if you know enough of it.
pxor 08. Oct 2009	too bad serial was hardcoded could be fun ;)
Gyula84 12. Oct 2009	D-Jester use XP-mode :)
adlers 08. Jun 2012	Serial is hardcoded...;-) Not so easy, not so hard...but, after solving it everything seems to be so easy..:-) Here comes a little hint: Dump

__ed's ErnoCube 2009

Download ErnoCube.zip, 84 kb (password: crackmes.de)
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This keygenme deals with Permutations, coded in C/ASM.
I coded this one on a sunday afternoon, just after found my
old Rubik's Cube 5*5*5 hidden under my bed... and I had an idea !
I also wrote a keygen for this keygenme without any brute forcing (due to the complexity).
Then do not use brute force to write your own one too.
If you find a correct key I owe you a beer

You can submit solution to crackmes.de.
You can contact me on #uct @ Epiknet.
You can try to send me a travler pidgin over the sea, but it's not sure.

There is no packing protection, or any anti-debugger...
if a debugger is detected, the XM (Music) is not launched.

__ed.

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: C/C++

Published: 29. Oct, 2008
Downloads: 485

Rating

Votes: 3
Crackme is good.

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Solutions

Solution by __ed, published 20. jun, 2009; download (170 kb), password: crackmes.de or browse.

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Solution by .ZwXxx, published 19. may, 2009; download (66 kb), password: crackmes.de or browse.

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Discussion and comments

doggbielord 29. Oct 2008	Patching is allowed Or Not ?
__ed Author 29. Oct 2008	@doggbielord: No. this is a keygenme.
MR.HAANDI 30. Oct 2008	Hehe, I actually had the same idea some months ago, but was too lazy to look up Rubik's Cube formulae.
__ed Author 30. Oct 2008	It was funny :)
andrewl.us Moderator 30. Oct 2008	:( 6 ptrs -> 0x3D pointers -> 0x3D pointers -> too much code! ratsoul had a rubik's cube keygenme in Oct 2007: http://crackmes.de/users/ratsoul/crkme_1/ __imp__'s solution is very good, maybe he will see this one too
__ed Author 30. Oct 2008	@andrewl.us: Indeed, I didn't saw this one... it seems to be the same concept, except the complexity... 0x3D * 0x3D * 0x3D or 0x3 * 0x3 * 0x3 is the same solving method, so this is not a problem cause you can reduce the environnement. Anyway, my algorithm is not reproducing the rubik's cube physics, but it's close.
jE! 12. Nov 2008	why so ugly strings inside?? >Thanks to: >Mattwood9 (Mattwood9 I love blowjob)

__ed's SuchAName

Download SuchAName.zip, 13 kb (password: crackmes.de)
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This is my first keygenme, then I'm not able to give you a relative level, and then not able to give it a name too. All that I can say is this keygenme is a custom algorithm a bit modified by myself (:p) and it's using SHA1 tables. Good luck.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 28. Apr, 2008
Downloads: 422

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Solutions

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Discussion and comments

__ed Author 01. Jan 2008	Hi, Happy New Year. @soychino : Do not use private messages for a few helpful hints. All crackers will have the same clues :) Note: the key is unique. The entry must be the value of my encrypted algorithm ID for the drive C:\. Two very different algorithms are used, one encrypts, and the second is the display algorithm, however, using a small dummy.
IamTCM 16. Jan 2008	hmmmm, this looks like a brute-force solution...
Computer_Angel 16. Jan 2008	Nearly find the goal. I'll post solution soon
Computer_Angel 18. Jan 2008	Recover the display algorithm but I stuck n the encrypt algorithm ID, right now can't convert the encrypt back to normal.
TiGa 28. Apr 2008	Crackme updated with a new version.
lithium 07. Jun 2008	Is this perhaps impossible for some volume serials? For example, the first letter of my C: serial is '6' = 0x36 ascii. Reversing the display algorithm, the hashed serial byte 0 has to be 0xFF or 0xEE (since 0xFF+0x37=0x36 and 0xEE+0x48=0x36). The byte of the hash is always selected at last by an index in table starting at 0x405440. However, this table has no byte FF, so it's not possible to get ascii '6' to match with serial volume. Hopefully this makes sense, maybe I'm wrong...
thewhip369 08. Jun 2008	lithium: first, sorry for my english. Second, about the crackme: If the first letter / number of the series is the'6 'which is ascii 0x36, note that in the right direction 0x40147E makes a comparison if'6' is greater than'9 ', as it is not, does not jump, then: 0x30 +0 X06 = 0x36. I hope you understand.
__ed Author 03. Oct 2008	lithium: all value are possible. this is a bijective algorithm. In case I'm wrong, write a proof of concept, but it was designed to be bejective.
user2k 05. Oct 2008	ed: 1' what's the display algorithm ? 2' seems that keygenme generates lots of bad serials (with values 0-31) [not convertable to range 0-ffffffff] - from mine test so far tested 476485214 ,valid 2381554 (orl iam doing something wrong) 3' what about serials with 0 at start , sprintf("%X" dont include it and strcmp at end will try "1024" and "00001024" and always != btw. nice algorithm, but tables, from tables, from tables...
__ed Author 30. Oct 2008	@user2k: The display algorithm was removed during the last update. Indeed, the strcmp was coded a bit too fast, but I never saw any VolumeInformationA() returning a value < 0x10000000 :P (Ok, that's not cool), but anyway, the aim of this keygenme is not to get the good boy, you can patch it to view it, but to understand the algorithm, and the backtracking solving algorithm.
user2k 01. Nov 2008	ed: in wine serial number of virtual drive c:\ is always 0 :) and yes, serial number can start with 0, (first byte in first word of serial -> [month+sec] of format operation lowest serial number in this year was : 1 jan 2008 - 00h:00m:00s:00ms -> 0101-07d8 :)
mjesun 02. Nov 2008	ed: I don't have any C drive in my computer, so the function crashes returning in EAX 0 (which is not checked), so the value of [pVolumeSerialNumber] is undefinded.
__ed Author 03. Nov 2008	Mea Culpa ! Indeed, it was a bad idea to use this way to highlight my algorithm... but the real aim of this crackme is to understand the algorithm, and try to reverse it, not to find a way to thwart my crackme :P
user2k 06. Nov 2008	your alhorithm looks like another "only bruteforce solution", lots of that crackmes last days (Ok, that's not cool).
__ed Author 08. Nov 2008	No. I have a keygen, and it's not a bruteforce algorithm, but a backtracking tree algorithm ;)
user2k 10. Nov 2008	if u got keygen for this, sry for last post, ill try to solve it :)
__ed Author 12. May 2015	Still no keygen? :P

eddie van camper's digitalinsight

Download di_w32acm2.zip, 3 kb (password: crackmes.de)
Browse contents of di_w32acm2.zip

find the protection...

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 05. Jul, 2001
Downloads: 2643

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Solutions

Solution by roy, published 05. jul, 2001; download (4 kb), password: crackmes.de or browse.

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Solution by death, published 05. jul, 2001; download (2 kb), password: crackmes.de or browse.

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Solution by Lightning, published 05. jul, 2001; download (12 kb), password: crackmes.de or browse.

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Solution by the_dux, published 05. jul, 2001; download (2 kb), password: crackmes.de or browse.

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eholzbach's basic logic

Download logic.tgz, 784 b

Learn the logic. Solve the simple puzzle without patching your way to the correct text output.

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: Assembler

Published: 27. May, 2015
Downloads: 662

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Solutions

Solution by Kaltwa55er, published 14. jul, 2015; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

Kaltwa55er 27. Jun 2015	This one is good if you don't know anything about Linux system calls and/or terminal attributes. I had fun with it.
eholzbach Author 01. Aug 2015	Great job on the solution, Kaltwa55er

Eldad Eilam's Defender.exe

Download Defender.zip, 12 kb (password: crackmes.de)
Browse contents of Defender.zip

This CrackMe is very very Special :)) . It has some very hard protections that will make your cracking sessions very enjoyable

Difficulty: 5 - Professional problem to solve
Platform: Windows 2000/XP only
Language: C/C++

Published: 19. Aug, 2005
Downloads: 2062

Rating

Votes: 10
Crackme is nothing special.

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Solutions

Solution by zairon, published 07. sep, 2005; download (36 kb), password: crackmes.de or browse.

zairon has rated this crackme as quite nice.

Discussion and comments

code_inside 19. Aug 2005	Nice CrackMe :) But at some point it uses the name and serial stuff to decrypt a piece of code and then runs this code. Do you need to guess (Bruteforce...) to what instructions it needs to be decrypted? Because I don't see another way around :)
Arilou 19. Aug 2005	There is no need to bruteforce you just need to this here is an example key if you dont feel like thinking full name = Arilou serial = 3F12C03E1C9905E6 Very nice crackme Eldad :-) keep them coming!
TQN 20. Aug 2005	Hi Arilou ! I test with your supply key, and defender say: "Sorry... Bad key, try again."
Arilou 20. Aug 2005	Ahh yes TQN you are correct im really sorry forgot to provide my C Driver Volume Serial Number. 0xc40100b (just change your to this or change the global 406020 after the call to ZwQueryVolumeInformationFile) the call address is at 00401B6C (and if that does not help you the keys to the encrypted buffers are: 0xB14AC01A ; first buffer 0x8ED105C2 ; second buffer ) i think this is enough information ... nothing much left now 3 lines of code to keygen it (but try finding the keys to the encrypted buffer your self *WITHOUT bruteforce...
code_inside 20. Aug 2005	Very nice Arilou :) I've also encountered that the CrackMe shows nothing except the string "Defender Version 1.0 ...", I think this is a little bug (But I haven't checked what's causing it). But I still don't see how it can be done without a little bruteforcing? Well, i'll just wait for a solution to show up ;)
Arilou 20. Aug 2005	:) thank you code_inside Eldad is there a way to contact you ? email or something ?
lord_Phoenix 21. Aug 2005	Great crackme ;) if someone liked it than try my second crackme - that's harder maybe and use this protection theme.. it's not ad =)
code_inside 08. Sep 2005	Nice solution zairon, Now I understand it :)
deroko 09. Sep 2005	yap really nice solution =)
Oorja-HalT 09. Sep 2005	You have proved once again you are just like your avataar a mamoth cracker
zairon Moderator 09. Sep 2005	Thank you my friends, too kind as usual. After submitting the solution I discovered that there is a full description of the crackme inside Eldad Eilam's book 'Reversing - Secrets of Reverse Engineering'. I'm reading it but I haven't noticed it until few days ago... it seems to be a good book. I suggest to read the solution made by the author :)
bLaCk-eye Moderator 09. Sep 2005	I see everybody is kind with YOU when you are a moderator here, except me :) (i get kicked in me balls). Anyway very sweet solution by zairon ;) Take care and waiting for next crackme from out celebrity :)
deroko 13. Sep 2005	I've got that book and Eldad wrote about 50 pages on reversing this crackme =) very interesting, but here is one my old macro if anybody finds this tehnique of writing crackmes or programs interesting: @sysenter macro syscall, parameters local __@@1, __@@2 push eax jmp __@@2 __@@1: mov eax, syscall mov edx, esp dw 340Fh ;sysenter 0F34h __@@2: call __@@1 add esp, (parameters*4) + 4 ; + 1 for dummy EIP endm

elfz's elf'Z crackme 1 - naughty

Download elf_cm1.zip, 54 kb (password: crackmes.de)
Browse contents of elf_cm1.zip

Some interesting methods experienced in real-life

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 28. May, 2003
Downloads: 3506

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Solutions

Solution by morecode, published 27. nov, 2012; download (204 kb), password: crackmes.de or browse.

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Solution by Plasmator, published 06. jul, 2004; download (65 kb), password: crackmes.de or browse.

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Solution by human_thought, published 30. may, 2003; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

elfz's elf'z crackme 3: ancient crypt

Download elfz_crackme_3.zip, 51 kb (password: crackmes.de)
Browse contents of elfz_crackme_3.zip

...and now for something completely different...

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 16. Apr, 2004
Downloads: 2908

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by Plasmator, published 19. may, 2004; download (71 kb), password: crackmes.de or browse.

Plasmator has not rated this crackme yet.

Discussion and comments

promix17 01. May 2011	Can we found the required movement of the mouse not by bruteforcing crypt.zip? Only from is_solved proc and the const 58291327h: the only way to get it is 1787005111 (or 11h52f97b7h).

elfz's elfZ crackme 2 - naughty again

Download elf_cm2.zip, 52 kb (password: crackmes.de)
Browse contents of elf_cm2.zip

(masm) find the word

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 30. Sep, 2003
Downloads: 3155

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by sghctoma, published 22. jan, 2009; download (405 kb), password: crackmes.de or browse.

sghctoma has rated this crackme as awesome.

Solution by Plasmator, published 06. jul, 2004; download (70 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 16. oct, 2003; download (2 kb), password: crackmes.de or browse.

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Solution by fnuk, published 14. oct, 2003; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

elfz's elf'z crackme 4

Download elfz_crackme_4.zip, 17 kb (password: crackmes.de)
Browse contents of elfz_crackme_4.zip

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: Assembler

Published: 04. Feb, 2005
Downloads: 2365

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Roma, published 24. feb, 2005; download (5 kb), password: crackmes.de or browse.

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Send a message to elijunior01 »

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Discussion and comments

MaxM 25. Sep 2005	You'd tell what is the surprise within... I gave up bc I was running MAD tracing it in Olly... 50% rebuilt, not that difficult once you get the tip ;)
Conical 13. Jun 2006	You don't have to brute force the name of the file (as Roma did it in his/her solution). Just look carefully at what is happening to the single bits of a filename during the hashing procedure. It is easier than it may seem at first sight.

elijunior01's VVSC

Download VVSC.tar.gz, 3 kb

Very very simple crackme.

Just find or bypass the password.

Enjoy! =)

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 22. Apr, 2015
Downloads: 328

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Solutions

Solution by s_u_n_r_i_x, published 23. sep, 2015; download (881 b), password: crackmes.de or browse.

s_u_n_r_i_x has not rated this crackme yet.

Solution by bat.serjo, published 03. may, 2015; download (14 kb), password: crackmes.de or browse.

bat.serjo has rated this crackme as nothing special.

Solution by jockcranley, published 03. may, 2015; download (608 b), password: crackmes.de or browse.

jockcranley has rated this crackme as nothing special.

Send a message to elitexp »

View profile of elitexp »

Discussion and comments

__;;_ 23. Apr 2015	Reasonably fun, pretty simple though. Thanks elijunior
s_u_n_r_i_x 31. Aug 2015	Awesome one for beginners ty :)
reasdfasdf 21. Sep 2015	Nice beginner program. Thanks!
specx 24. Feb, 16:22	I think this one is too easy :)

elitexp's EliteXp CrackMe 1.0

Download Crack.zip, 6 kb (password: crackmes.de)
Browse contents of Crack.zip

This is my first CrackMe ie. EliteXp® CrackMe v1.0

This crackMe uses a function to generate a serial of double data type.
The serial calculation is very loopy and includes sum, product, xor as well.

e.g.
elitexp
361056171124446

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 06. Dec, 2010
Downloads: 325

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by deurus, published 12. dec, 2010; download (130 kb), password: crackmes.de or browse.

deurus has rated this crackme as nothing special.

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Discussion and comments

deurus 09. Dec 2010	Hi elitexp!! Perhaps is overrated but good job anyway.
elitexp Author 10. Dec 2010	Its in VB and, I even can't keygen it without seeeeeeing the code.........
deurus 10. Dec 2010	my tuto help you/us
elitexp Author 18. Dec 2010	Sorry!! deurus.... I didn't see it earlier... bt. Its fantastic and I might need help in patching toooooo........ I am a newbie..... n' only patch easy one...... plz provide me ur email ID: I shall be in touch wit u 2 learn.........
instruder 19. Dec 2010	e，its in vb........

elmasmalo1's C1-SA Lock System

Download C1-SA_Lock_System_-_CrackMe_-_0x90.zip, 373 kb (password: crackmes.de)
Browse contents of C1-SA_Lock_System_-_CrackMe_-_0x90.zip

Simply find out what's going on with your username! thats it :D

Ultimately, you can patch/jmp/nop whatever it takes to get the GoodBoy. Just make sure whatever method you find out, include it in the solution.

-------------------------------------
Anti-Debugging: Debugger Detected
Anti-Reversing: Partial Obfuscation & Authentication is limited

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 29. Jul, 2015
Downloads: 780

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to emadicius »

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Discussion and comments

Unvarying 03. Aug 2015	Not opening. Says something about a .dll.
acruel 04. Aug 2015	You need Xojo framework to open the crackme.
elmasmalo1 Author 06. Aug 2015	Yes, I found out you guys would have problems while opening this, I sent the updated ZIP however I'm still waiting for a mod to approve it.
acruel 08. Aug 2015	You are awesome!
Pr0bit 13. Oct 2015	hi can anyone assist, I got same error - missing dll
adlers 10. Nov 2015	This is a funny one...never seen a message "Failed to locate Framework DLL". Maybe, is it an intent? :-)

emadicius's ClipperCrackme

Download ClipperCrackme.zip, 638 kb (password: crackmes.de)
Browse contents of ClipperCrackme.zip

ClipperCrackme

Objetivos:

1) Desempakar (Unpack)
2) Hallar el serial correcto (hardcoded) (Find the correct serial)

emadicius@gmail.com

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 25. Oct, 2006
Downloads: 596

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to Encrypto »

View profile of Encrypto »

Discussion and comments

haggar 26. Oct 2006	Why is trying to connect on internet?
emadicius Author 26. Oct 2006	Is part of the protection. No virus/No malware :-p
DaBookshah 02. Nov 2006	unpacking was easy, but i don't have any idea about the internet thingy:(
emadicius Author 03. Nov 2006	hey, nobody? common, i dont think its hard... i want a tutorial! the crackme is packed with a new very beta protector im working for now... [mslrh] is in sleep state
DaBookshah 07. Nov 2006	The packer was ridiculously easy(just a find and replace for those rdtsc commands). But I gave up when i got to the internet bit, sorry. maybe I'll come back to it eventually.
DaBookshah 07. Nov 2006	Actually, was this the one with the rdtsc code? I can't remember, all the crackmes blur together after a while :S
emadicius Author 07. Nov 2006	yes, the packer code has rdtsc commands... i hope you beat the internet bit...
haggar 09. Nov 2006	>unpacking was easy, but i don't have any idea about the internet thingy:( Yeah, me too.
emadicius Author 10. Nov 2006	i dont think the internet activation trick is difficult, try hard!

Encrypto's Aurora

Download Aurora.keygenme.10.zip, 289 kb (password: crackmes.de)
Browse contents of Aurora.keygenme.10.zip

This is my new math keygenme. Uses some math and crypto :).

Some rules:
1) Keygen only
2) No patching, bruteforcing, serialfishing etc...
3) Enjoy!

Greetz to HVC, Mynes, Grindstone, and all my friends ;)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 09. Sep, 2009
Downloads: 728

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by Numernia, published 14. sep, 2009; download (45 kb), password: crackmes.de or browse.

Numernia has rated this crackme as quite nice.

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Discussion and comments

reichoman3 14. Sep 2009	i didnt do a keygen BUT i made it to show up "activation successful" :P i didnt pach!,bruteforce or serialfish.
andrewl.us Moderator 14. Sep 2009	cool how?
Encrypto Author 14. Sep 2009	Nice solution Numernia ! :D. And reichoman3: Did you do that just by redirecting code-flow in the crackme itself ?.
Xspider 15. Sep 2009	maybe it's just memory patching, thank's Numernia for your solution :)
The So;X 15. Sep 2009	hey man really nice crackme... and nice solun by Numernia... (ya professional's r back in business )

Encrypto's ECrypt7.2008.Keygenme7.FOFF

Download ECrypt7.2008.-FOFF.zip, 376 kb (password: crackmes.de)
Browse contents of ECrypt7.2008.-FOFF.zip

This is my new version .. ive been developing this for a while.

I hope this one is harder than the older versions.

;)

Thanks to Mynes for gfX. and to SerialKiller for all the good help .

Thanks to FOFF..

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 28. Dec, 2007
Downloads: 653

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Solutions

Solution by crackerlnn, published 18. jan, 2008; download (65 kb), password: crackmes.de or browse.

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Discussion and comments

boonz 30. Dec 2007	I've got it all straight except for one point: The initialization of the modified *Bit-** (correct if you feel I'm spoiling too mich) - in addition to the four chaining constants it initializes two more values. If I understand correctly, these are the bits/counts which are usually 0. If I modify them in my keygen my hashes vary and I don't get a single hash for a given string. Hints? =)
Encrypto Author 30. Dec 2007	well .. there are three stages to it ... Stage one .. simple stuff .. Stage two .. a crypto hash "based" on the MD5 hash .. Stage three .. well .. .;) [ a bit too much huh ]
HMX0101 30. Dec 2007	boonz, you're wrong... it isn't count... if you take a look deeper you'll see it have two more init dword and round functions have 6 args, which differs from standard algo (i recommend if you don't want to get crazy, rip algo, btw i've not ripped it, but analyzing it took me like 3 hours ;)
Ox87k 09. Jan 2008	Did someone make a working keygen NOT in delphi?

Encrypto's Encryptos Easy KeyGen Me 4.0

Download KeyGenMe.4.0.By.Encrypto.zip, 199 kb (password: crackmes.de)
Browse contents of KeyGenMe.4.0.By.Encrypto.zip

Well this is a pretty easy keygenme.

:)

have a good time.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 25. Oct, 2007
Downloads: 1194

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by sd333221, published 27. oct, 2007; download (312 kb), password: crackmes.de or browse.

sd333221 has rated this crackme as quite nice.

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Discussion and comments

sd333221 26. Oct 2007	Yes it is quite nice, I wrote a solution + keygen and submitted it.
Encrypto Author 28. Oct 2007	well done sd333221 :)
Encrypto Author 29. Oct 2007	anyone else tried this one ?
br0ken 31. Oct 2007	Since when did crypto crackmes become "Very easy, for newbies"? No wonder newbies have a hard time solving level 1s.
DigitalAcid 31. Oct 2007	I phished the serial for my name. I love phising =P.
br0ken 31. Oct 2007	I made a self-keygen. But all i'm trying to say is, this is definitely not a level 1.
unicorn 31. Oct 2007	nothing to do much. straight MD5, use IDA with good plugin, code as the same :)
Encrypto Author 03. Nov 2007	really ? is it not level 1 ? hmm.. oh well its changed to 2 then lol... thanks for trying..
TiGa 03. Nov 2007	Why level 2 instead of 1? If this was the first crackme someone ever tried to solve, he'd be clueless about MD5.
Encrypto Author 03. Nov 2007	oh ok ... im sorry for being stupid thanks for reporting.
SIDEBOTTOM 18. Nov 2007	When attempting to open the ZIP I get the following message: The Compressed (zipped) Folder 'KeyGenMe.4.0.By.Encrypto.zip' is invalid. (Using Vista Home Premium's Standard Unzip feature)
DigitalAcid 18. Nov 2007	Apparently that happens when a rar file (abc.rar) gets renamed to zip (abc.zip)...
Encrypto Author 20. Nov 2007	odd.. it works for other people who use vista

Encrypto's KeYgen.Me.v.6.0.By.Encrypto

Download KeyGen.Me.v.6.0.by.Encrypto.zip, 306 kb (password: crackmes.de)
Browse contents of KeyGen.Me.v.6.0.by.Encrypto.zip

this is my keygenme v.6.0....

hope you like this

please rate this crackme.

enjoy

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 15. Dec, 2007
Downloads: 869

Rating

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Solutions

Solution by boonz, published 19. dec, 2007; download (385 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 16. Dec 2007	I think this one is overrated... its a level 2 ;P .... Too easy, after you figure unused code :) if you know, what i mean ;)
cyclops Moderator 16. Dec 2007	yep, just 2 hash algos, b64 can use in serial checking algo to make it a little harder to fish :P. already sent keygen to author :)
Encrypto Author 16. Dec 2007	i did rate it a 3.. anyway Cyclops b64 is not only used to make it a little harder to fish ;) its also used in the generation of it .. Anyway Cyclops im sure it was easy for you. dont know what is wrong with your solution but it doesnt run on my PC.
cyclops Moderator 16. Dec 2007	I mean, if b64 used in serial checking, it wil b nice! and i havnt seen b64 in serial generation or in serial checking...just 2 procs to add "a constant value" to all chars and a xor "the name length" to all chars. Only use of b64 is to decode the good_boy and bad_boy messages. and my keygen works good :)
Encrypto Author 16. Dec 2007	hmm .. yes indeed... it seems theres a bug in my keygenme. ah well .. it will remain like that. no idea why the keygen doesnt work for me
complxor 17. Dec 2007	Is reversing an option?
Encrypto Author 19. Dec 2007	No. not for the crackme at any rate. Its quite simple to be honest. Anyway i would like to mention that Chupachu,Cyclops and HMX0101 have solved this.
Encrypto Author 20. Dec 2007	Well done boonz. like the keygen.
boonz 20. Dec 2007	10q - btw: cyclops & hmx, what's up, are u 2 lazy 2 write a solution nowadays? :)
starzboy 21. Dec 2007	yea , overrated. Kinda easy , too much crap algo :)
cyclops Moderator 21. Dec 2007	@boonz: Just busy to get packed.am gonna start working(real life :P)
Coderess 14. Mar 2009	He-he, I found the write key, now study generation code, shall then write keygen

Encrypto's Keygenme.8.DCrypt

Download Keygenme.8.DCrypt.by.FOFF.zip, 284 kb (password: crackmes.de)
Browse contents of Keygenme.8.DCrypt.by.FOFF.zip

This is my new crypto Crackme. This time i thought instead of modifying existing crackmes why not create a own crypto ?

well to be honest its not the best but it was an attempt ;)

i hope you like it.

i would like to say thanks to SerialKiller and Mynes.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 09. Feb, 2008
Downloads: 692

Rating

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Solutions

Solution by freesoul, published 11. mar, 2009; download (82 kb), password: crackmes.de or browse.

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Discussion and comments

Encrypto Author 10. Feb 2008	What do you think ?
yaaara 10. Feb 2008	I easily found name/ serial combination. Can I turn crackme's exe file into keygen?
Encrypto Author 10. Feb 2008	that is against the rules remember ;) serialphising is too easy to be honest with you lol
vsealv 11. Feb 2008	Nice tutorial. Thank you. I was able to get Good Cracker msg :-)
Encrypto Author 11. Feb 2008	erm .. tutorial ? what tutorial ?
Knight 14. Feb 2008	"serialphising is too easy to be honest with you" That is the sign of trivial serial check, so it is protection that is easy, not it's cracking method.
Encrypto Author 14. Feb 2008	ehem if you didnt notice.. its a keygenme.
Encrypto Author 14. Feb 2008	And HMX0101 has solved it the proper way :D. damn hes good
freesoul 20. Feb 2009	hello encrypto, I only took a look over the keygenme before analyzing it... so it's a self made algo? isn't a modified of existing one? because it looks so long... :O
andrewl.us Moderator 04. Mar 2009	encrypto did you modify this routine or is delphi crazy? or maybe someone can answer why I'm crazy :) __fastcall Sysstem::__linkproc__ _llushr(void) 0040508C: cmp cl,20h 0040508F: jl loc_004050A2 ; should be JB!!! 00405091: cmp cl,40h 00405094: jl loc_0040509B ; should be JB!!! 00405096: xor edx,edx ; shamt > 64 00405098: xor eax,eax ; so return 0 0040509A: ret 0040509B: mov eax,edx ; 64 > shamt > 32 0040509D: xor edx,edx ; so return shift dword 0040509F: shr eax,cl 004050A1: ret 004050A2: shrd eax,edx,cl ; shamt < 32 004050A5: shr edx,cl ; so do normal shift on 004050A7: ret ; each dword imagine shifting by 0xAD this should shift by 45 bits (0xAD & 0x3F) (as c compiler does with _aullshr()) eg: 0x0000000060099006 -> 0x0000000000000000 instead this delphi routine considers 0xAD as -53, so it jumps down to where it thinks shamt < 32 then shrd considers low 5 bits of 0xAD as 13 eg: 0x0000000060099006 -> 0x000000000003004C
simonzack Moderator 05. Mar 2009	Are you sure it's not 0x3004C80300000? i think this should be the right result, since a<<-b=a>>b
simonzack Moderator 05. Mar 2009	oops sorry my mistake i misunderstood you i'll check the routine again
freesoul 09. Mar 2009	Sent a solution :) I've just ripped it... but at least it's a solution! :D
simonzack Moderator 10. Mar 2009	ripped it? I'm sure it got rejected sorry :p look at what the author said more closely
freesoul 10. Mar 2009	I think it won't, the author authorized me... :D

Encrypto's Keygenme.9.dEPENDENCE

Download Keygenme.9.dEPENDENCE.zip, 344 kb (password: crackmes.de)
Browse contents of Keygenme.9.dEPENDENCE.zip

another crypto keygenme :).

dedicated to : SerialKiller a good mentor and friend

Thanks to :

Mynes for skinning this pile of junk

HMX0101 for testing and reporting bugs

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 14. Apr, 2008
Downloads: 799

Rating

Votes: 4
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by cyclops, published 16. oct, 2008; download (631 kb), password: crackmes.de or browse.

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Send a message to eslimasec »

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Discussion and comments

Encrypto Author 14. Apr 2008	Please remember no patching ;). Thanks and enjoy :)
Xspider 14. Apr 2008	Nice shot Encrypto :)
Encrypto Author 15. Apr 2008	48 downloads and no comments :(. feel free to ask for advice or tips ill be happy to offer my help
apuromafo 16. Apr 2008	well nice 0047BF40 > $ 55 PUSH EBP delphi nice
apuromafo 16. Apr 2008	Make a keygen and post a solution --------------------------- Aceptar --------------------------- ouch, well nice crackme, is difficult the keygen..for me..hash code not are good.
Encrypto Author 16. Apr 2008	nice :). ill presume that you either patched the check or did it in runtime. (:. Thanks for trying the crackme hehe.
Encrypto Author 20. Apr 2008	okay time to release the protection : Elgamal-64 bits + custom hash + modified md5. simple really :)
Encrypto Author 20. Oct 2008	Nice one Cyclops :) Thanks a million for trying it mate. and well done on the keygen. Cheers
onegoodmen 21. Oct 2008	New Person come in

Coderess 07. Jul 2009	This crackme does not work on my computer, Windows XP, sp2
escrotao Author 08. Jul 2009	strange.. i compiled using Visual C++ in Windows XP. What is the error?
stranac 08. Jul 2009	Just reports an error. You know, the usual bad configuration stuff
Coderess 08. Jul 2009	http://s57.radikal.ru/i155/0907/2e/9e478ad0d008.jpg
br0ken 08. Jul 2009	Maybe installing this will help. http://www.microsoft.com/download/escrotao-n1.zips/details.aspx?FamilyID=9b2da534-3e03-4391-8a4d-074b9f2bc1bf&displaylang=en
KernelJ 08. Jul 2009	Runs fine for me but I have the Visual C++ runtime installed. (Only 2005 version though showing on add/remove programs)
Coderess 08. Jul 2009	Thanks to br0ken, this problem was solved
Coderess 08. Jul 2009	Coderess 18014-28350-28944-52085
Holy 08. Jul 2009	Very easy ^^ Explanation + keygen + source code of keygen uploaded.
KernelJ 08. Jul 2009	Unfortunately the first character of your name has no effect on the resulting serial.
KernelJ 08. Jul 2009	Hmm I made my keygen in Dev-C++ and it still worked. Disassembling my keygen shows that msvcrt is used. I'm presuming since the random number generator is in the standard library and still works the same, it must be a standardized thing that never changes. Well i learnt something from this ridiculously easy keygenme. Should be difficulty 1 I think.
Holy 08. Jul 2009	Yeah, I coded the keygen in MASM32 and thought to use the MVSCR90.dll, but as you say msvcrt is used. And it have the necessary functions like "srand, malloc, free and rand". Is incredible to see that APIs for random number generator like rand in this crackme are generating always the same numbers ^^
escrotao Author 11. Jul 2009	the rand generate always the same numbers in the same order for the same seed
escrotao Author 13. Jul 2009	thanks for your submissions its nice to see some feedback!
*DNison** 16. Jul 2009	when trying to open with ollydbg it just says failed to open crackme
josevalviana 18. Jul 2009	tried to do the same in Java... random and stuff... it gives me other serial number but the seed is the same... :/
escrotao Author 18. Sep 2014	josevalviana: The rand function can be implemented in different ways... you should go for the same language/lib that i used. Or you could copy its values.

eslimasec's ncn

Download ncn.zip, 4 kb (password: crackmes.de)
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Crack me developed by a firend of mine (CT) that was supposed to be used in a crackme contest at a spanish security con called NoConName.

The program encrypts the text provided, therefore you have to decrypt the following text "0J3N2rElwSr1KrOPiJW0Th6ZjxQ06poPnwCfybk3ZtARCXWEId8YuBiyMr9JkCZl"

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 16. Jun, 2009
Downloads: 452

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Solutions

Solution by Yoha, published 14. feb, 2013; download (6 kb), password: crackmes.de or browse.

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Solution by San_SS!, published 03. aug, 2009; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

The So;X 30. Jun 2009	is it password from shadow file.
eslimasec Author 04. Jul 2009	then use john the ripper ;) ...no it's not take from shadow file
The So;X 04. Jul 2009	ok.. then i have to look for different method... Nice crackme though :)

eSn-mIn's Jandepora

Download crackme4.zip, 1 kb (password: crackmes.de)
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An open source crackme for Linux

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: Unspecified/other

Published: 29. Jan, 2004
Downloads: 2648

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Votes: 3
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Solutions

Solution by taviso, published 04. jan, 2006; download (6 kb), password: crackmes.de or browse.

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Solution by kRio, published 13. feb, 2004; download (8 kb), password: crackmes.de or browse.

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eSn-mIn's Larys Kaniwary Zeus Fixed

Download larys3.zip, 3 kb (password: crackmes.de)
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Name/Serial Needs MMX

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Jun, 2003
Downloads: 1370

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esteve's ARM kgme1

Download arm_kgme1.tar.gz, 3 kb

This is a Linux/ARM keygenme, the rules are simple:

- Write a keygen for it.

So no patching is allowed. As the platform is not very usual it can be tested on an emulated system.

It has been tested successfully on maemo scratchbox.

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 27. Oct, 2008
Downloads: 288

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Solutions

Solution by mrmacete, published 12. aug, 2015; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

esteve Author 17. Nov 2008	Tip #1: The protection consists of a small VM.
WarRock 21. Nov 2008	arm that should run also under ppc ..pda bla
acez 04. Sep 2013	20594503, 5632345c, 5194f880, 48ff886f, 5753a058, 70bed4c0 4f98fb88, 9eaef141, 53f7b1d1, 1a8baf32, 10a03f8d, 42ce2942 dc5357a2, 1482fb0b, 5c353671, 17f5d537, 0188895e, 051e2fd0 6e2f5557, c71e6c9c, 56b108e8, 5dbdb368, 010e9fc9, 5e6e83f6

eternal bliss's crackme v5

Download eb_crkme5.zip, 2 kb (password: crackmes.de)
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find the key...

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Aug, 2001
Downloads: 2255

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Discussion and comments

MACH4 15. Aug 2010	Give me one good reason why this should not be patched! 8+ byte message encryption loop, 8+ byte key encryption loop, encryption juggling! Bad coding (intentional?) hInst is overwritten etc,etc Message needs to be a sentence! author just processed his message sentence and key of choice then hard-coded the result, bruteforcer? no way!;D Don't waste your time! Should be removed (lol) MACH4

Euclides's The easyest hard problem ;)

Download keyme.zip, 28 kb (password: crackmes.de)
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There is no tick everything is loud and clear BUT ! it's still hard ;)

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Assembler

Published: 19. Aug, 2005
Downloads: 542

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Solutions

Solution by NoRG, published 29. aug, 2005; download (39 kb), password: crackmes.de or browse.

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Evil2006's Evil 1.1 Unpackme

Download UnpackMe.zip, 82 kb (password: crackmes.de)
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Unpackme

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 02. Apr, 2008
Downloads: 3196

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Solutions

Solution by TiGa, published 09. apr, 2008; download (788 kb), password: crackmes.de or browse.

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Solution by DigitalAcid, published 09. apr, 2008; download (70 kb), password: crackmes.de or browse.

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Solution by br0ken, published 09. apr, 2008; download (982 kb), password: crackmes.de or browse.

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Discussion and comments

Evil2006 Author 02. Apr 2008	1. Unpack it ... 2. Write tutorial about...
DigitalAcid 03. Apr 2008	Uploaded a tutorial yesterday already ;). Allthough a video tutorial would be better for the unpacking.
br0ken 03. Apr 2008	@DigitalAcid, I've uploaded a video tut :)
DigitalAcid 03. Apr 2008	@br0ken: Can you tell me wich program you're using ? I tried CamStudio, but it's not that good.
br0ken 03. Apr 2008	@DigitalAcid, check you pm :)
Evil2006 Author 03. Apr 2008	where video ?!
TiGa 04. Apr 2008	This really should not have been called an unpackme. It takes less than 30 seconds to unpack.
DigitalAcid 04. Apr 2008	It's great practice for noobs to learn some better manually unpacking ;). I know it's hard at first. When i first read "manually unpacking" i was like "wtf" O.o, those crackers own, but it's actually easy when you get the hang of it.
apuromafo 14. Apr 2008	this is a molebox, is easy, other form is enter in the second call, press enter and press enter again, the call eax is the jmp to oep but are nice in all i too can inline edit, but is a other solution for a concurso 3 /2008 from cracklatinos if like that some day you see this solution in that team..see ya..
apuromafo 14. Apr 2008	this is a comercial packer maybe..i was thinked that the packer not must be comerciales?..well if like thats unpackme, maybe armadillo not are an exeption.. see ya..
apuromafo 15. Apr 2008	Can I pack/protect my Crackme with a commercial protector? No. This website is not meant to be a place where commercial protectors are disabled for you by other reverse code engineers. the packeds with a molebox not is a comercial? www.molebox.com/
DigitalAcid 15. Apr 2008	Just my 2 cents: Sometimes those scanners aren't always right... But who am i =) ?
apuromafo 16. Apr 2008	im have the molebox, is the same!.. but this not have import fake..well im not use scaners im haveexperience in packers as this..
DigitalAcid 16. Apr 2008	Well, if somebody made a pushad - popad packer, it will probably look like upx or so 8-).
TiGa 16. Apr 2008	@apuromafo: If you want a crackme taken out, PM a moderator with your reasons instead. Maybe this is Molebox, maybe this isn't Molebox. I don't really care at that point, let it go. It takes 30 seconds to unpack anyway. If it was a "trick" by the author, he could have grabbed any tutorial about UPX without waiting 7 days to see some solutions approved. It is not like it was a crackme from another challenge site where people earn points.
TiGa 18. Apr 2008	@apuromafo: If you want a crackme taken out, PM a moderator with your reasons instead. Don't post a page-long rant every 15 minutes, I'm not reading anymore. This is your last warning.
bendThis 22. Nov 2008	Nice learning here. Another code. But strange is that PEiD does not show any packer. It says Microsoft Visual C++. But if its an UnpackMe than surely it is packed. So i tried. But when i press F8 @00426713 i dont jump @00401130 but insted in the middle of ntdll @7C91E460. So i dumped the file right at the call. Why land i in the middle of ntdll ?
MulleDK13 24. Nov 2008	Isn't "pack" supposed to make it smaller? If I unpack it, and clean it, it's almost 50kB smaller.
MulleDK13 25. Nov 2008	nvm my last comment... I were comparing the cleaned dump with the uncleaned dump -.-
jE! 26. Nov 2008	guys! tuts are very low level of unpacking! 1. breack here 2. dump 3. run imprec at least descibe packer code-works; then there is original-IAT.. why using imprec at all??
agenttex 29. Dec 2009	AVG is reporting this download as containing a trojan. Is there a proper way to report this to a moderator?
agenttex 29. Dec 2009	I apologize for announcing a false positive. I suppose AVG is making a sweeping generalization about custom packers.

evilcry's Evilcry' s CM3

Download cm3.zip, 2 kb (password: crackmes.de)
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Find the correct Serial/BpxCheck/Anti-Disasm trick

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 08. Nov, 2002
Downloads: 1750

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Solutions

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Solutions

Solution by EvOlUtIoN, published 19. feb, 2014; download (31 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 23. Jan 2014	Good to see this crackme here...solution uploaded :P
andrewl.us Moderator 25. Jan 2014	come on EvOlUtioN...you know you need tutorial - resubmit please
adwi32 26. Jan 2014	hey tell me please how scanf("%llu",..) is supposed to work ? if i enter 64 bit digit it doesnt work it fill only first part of digit. I dont know if this is my system depented or not. For example if i enter 17793993638370666473 which is F6F0F6EFFEA4E7E9 = = F6F0F6EF FEA4E7E9 only FEA4E7E9 is wrote to the buffer, and 2nd part stays 00000000.
adwi32 26. Jan 2014	first part of a number*
evil-d Author 27. Jan 2014	Hey guys... the %llu directive that i used in making this crackme is dependent of mingw... You can patch the executable for using %I64u (%llu stand for long long unsigned int - 64bits unsigned integer) instead of %llu if you don't have mingw on your pc... Sorry for the bug...
EvOlUtIoN 27. Jan 2014	There is tutorial in my solution...may i wrong to put it inside?
EvOlUtIoN 29. Jan 2014	Ok, my fault. I submitted the complete one.
evil-d Author 08. Feb 2014	uploaded new version with some bugs correction.
EvOlUtIoN 10. Feb 2014	My solution is still queued...
adwi32 16. Feb 2014	lol so long, i am waiting for it... might aswell do it on my own gonna be faster :P
Crackerino 26. Feb 2014	It looks interesting, tomorrow I will try it :P
adwi32 27. Feb 2014	EvOlUtIoN very good solution
evil-d Author 01. Mar 2014	EvO... nice work (come detto già altrove) :) :)
hamdimec 18. Mar 2014	is it possible to solve it without brute force ? cuz i used ida i think there is function make some xor with 'evil-d1c' am i on the good way ?
EvOlUtIoN 19. Mar 2014	I dunno if it will be possible, but for sure bruteforce this is very fast, so imho it is useless to do something else.
bill xiao 23. Apr 2014	I have analysed several days,and I have some problem with sub_401669.I will apreciate it if you send me your source code.my email is 1211318695@qq.com.Thank you.

EvOlUtIoN's CrackMe #3

Download crackme_#3_By_EvOlUtIoN.zip, 4 kb (password: crackmes.de)
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--------------------------
CrackMe #3 By EvOlUtIoN
--------------------------

This is my third crackme written in assembly language.
It is not so difficult for me...i hope you'll enjoy it!

Targets:
1. Unwrap file and make it working on all machines.
2. Patch executable to show another message instead "Uncracked!"

This is tested on Win XP sp2, not working on win2k. After your work it should work correctly also on other s.o.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 22. Oct, 2007
Downloads: 642

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Solutions

Solution by sd333221, published 28. oct, 2007; download (92 kb), password: crackmes.de or browse.

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Discussion and comments

sd333221 23. Oct 2007	I already dumped the first layer and the fake-layer (Msg-box Application)... Maybe i got soon time to take a deeper look
sd333221 23. Oct 2007	I see.... Hidden calls to WriteProcessMemory.... Very tricky... I replaced the missing parts (FF FF FF FF in program) but my dump doesn't want to run :-(
sd333221 23. Oct 2007	Got the working dump now :-) Was a missing instruction to patch! I am writing a solution. Nice unpackme
EvOlUtIoN Author 23. Oct 2007	Great! I'm waiting for your solution...
sd333221 23. Oct 2007	I didn't mention it in my solution I just submitted. But there is a very advanced Anti-Debug technique you used in this one: You use a dummy-Process to debug the main Process to avoid attaching of a debugger. That is indeed very clever! :-)
EvOlUtIoN Author 23. Oct 2007	Nah it is not very advanced! There are tons of crackme that debugs child process! Did you noticed in your solution how to make it working on all s.o.?
sd333221 23. Oct 2007	Yes, it's quite short but I noticed the patch-table you used.
El_PuPaZzArO 28. Oct 2007	The solution of sd333221 is NOT working.. (XP sp2)
sd333221 28. Oct 2007	I use xp-sp2 and it works for me :-/ Try to follow tutorial.
Ox87k 28. Oct 2007	It doesn't work for me too, XP Sp2! Try my dumped here: http://www.mediafire.com/?bdnnimwoq1w
TiGa 28. Oct 2007	I tested them in a VM under XP-SP2 and they run without problems. They don't work in my real OS.
EvOlUtIoN Author 29. Oct 2007	Yes, it is not working... It is because of i inserted simple antidump based on direct API calls...value of api addresses are sent by debugger so sd333221 didn't do correct patches... Here is the reason i told it should work on all pc's...and solution published will work only on pc's with same API addresses of s.o. which dumped it. Solution not rellay complete.
sd333221 29. Oct 2007	Ok I am sorry, maybe someone will do it in his solution.
saytos 31. Jan 2008	I am change message without unwrap file ;-) And solution work on xp sp2 ;)
hardcoder 01. Feb 2008	This is amazing, I don't know why the auther rated it only 2 if I were the author I would definitely have rated it above 2. As far as my understanding, Process A creates process B, process B creates C and starts debuging it. All the logics are built inside B , antidump, obfuscations, (IAT entry -2) :)) Evolution you know what I am talking about Evolution , This is a very wonderful gift from reverser like me. hope to solve it by tonight.
hardcoder 01. Feb 2008	Typo * for reversers like us .
Ox87k 01. Feb 2008	hardcoder, to be honest i find 2 as right level. I solved it sometime ago but i remember it took me less than 10 minuts!
EvOlUtIoN Author 04. Apr 2008	0x87k, i'm not totally agree... It may be placed as level 3, i just took level2 but it can be raised up. I think 10 minutes is not possible, maybe you are talking about previous ones, i think most skilled presns can d it in about 25 minutes.

EvOlUtIoN's Crackme v0.1

Download crackme_v0.1.zip, 494 kb (password: crackmes.de)
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Try to register it! Should not be so difficult...

The only rule is that patches are not allowed in any way.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 02. Mar, 2007
Downloads: 587

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Discussion and comments

gr00ve 13. Dec 2010	not working on win7. missing richtx32.och

EvOlUtIoN's EnableME#1

Download EnableME#1_EvOlUtIoN.zip, 4 kb (password: crackmes.de)
Browse contents of EnableME#1_EvOlUtIoN.zip

Find the correct way to enable the button, patch it and write a tut.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 29. Aug, 2006
Downloads: 855

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by El_PuPaZzArO, published 07. sep, 2006; download (10 kb), password: crackmes.de or browse.

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Solution by BaKaE, published 03. sep, 2006; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN Author 01. Sep 2006	Nobody try to solve this?
BaKaE 01. Sep 2006	i solved this!! if you want i write a tut !!
EvOlUtIoN Author 01. Sep 2006	if you want send a solution, otherwise there is no problem, just write the correct patches to enable button
EvOlUtIoN Author 03. Sep 2006	Very good job Bakae, i knew it was simple but i don't thought to use vbreformer! congratz
BaKaE 04. Sep 2006	thnx now code a new crackme pleaZe!
BaKaE 07. Sep 2006	@ PuPaZzArO why did ya know that the Enable/disable function is saved after the height property explain pleaze
El_PuPaZzArO 07. Sep 2006	Because of usual in the programs in visual basic the function enable/disable fora button is found after the height of the same button. I have already resolved time ago an other crackme in this way. To try in order to believe:)

EvOlUtIoN's sun_crackme

Download crackme_sun.zip, 14 kb (password: crackmes.de)
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This is my second crackme.
I think is simple, but maybe not...

The goal is:
- Find the correct way to enable the check button
- Write a keygen for it, or simply find a correct serial for your name

Rules:
- Patching is allowed only to enable button

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 28. Sep, 2006
Downloads: 557

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Discussion and comments

sd333221 28. Sep 2006	I already enabled the button, but it seems like there is no comparision with the right serial :D Some crap algo i don't like because of visual basic... Let's see
EvOlUtIoN Author 28. Sep 2006	Yes, there isn't a direct comparison with the correct serial, but it is equally simple.
zhengjuyu 04. Oct 2006	I'm a newbie, I have no idea for patching vb button( i only can enable it at runtime ), could you give me some hints, thanks!
EvOlUtIoN Author 04. Oct 2006	i suggest you to look on other controls in order to enable the button, not only to the button, but other things...
mucki 05. Oct 2006	I used VB-Reformer to enable the button. I set the Check button enabled and the time of the timer to 9999. Then I patched the file at offset 9EC00 to E97BEAFFFF90 (a jump to the real algo, maybe I'm wrong), but now I don't want to go on because the algo is so long...
froidiÃ±o 22. Feb 2007	Hello EvOlUtIoN Maybe be wrong, but after analyzing it often, I believe that no solution exists. Can you confirm it?
Predator 23. Jun 2007	Enable the button is very very easy, the difficulty is in the keygen it. because vb make a lot of confusion in the code.
Predator 23. Jun 2007	mucki, why not set timer to 0? ;-)
soychino 24. Dec 2007	sum(username)&h56 xor BC614E=sum(serial)&h56 xor cf33ee is this correct? but i dont think there is a solution for the equation
narf 24. Dec 2007	soychine, a bit of elementary math yields: sum(serial) = ((sum(username)*0x56) xor 0xbc614e xor 0xcf33ee)) / 0x56 how's that for a solution? ;) just wiggle the serial a little until it fits.
soychino 26. Dec 2007	sum(serial) = ((sum(username)*0x56) xor 0xbc614e xor 0xcf33ee)) / 0x56 still i don't think there is logically a solution to the equation,can someone help me out?Thx!
deurus 16. Dec 2010	With Vb Reformer enable the button and put the timer to 0. Ok but we have anything to do because there is an even "mousedown" that disable the button. To activate the button first we need to locate the code, there are any ways but the fastest is get the offset with "SmartCheck". SmartCheck says that the mousedown offset is 49EC00. Analyzing the code we view this: Original: ;Push 0 in the pile; 0 = 00 = FALSE 0049EC99 6A FF PUSH 0 0049EC9B . 56 PUSH ESI 0049EC9C . 8B0E MOV ECX,DWORD PTR DS:[ESI] ;[...+8C] refers to the button 0049EC9E . FF91 8C000000 CALL DWORD PTR DS:[ECX+8C] Button cheat: ;Making this change we hoax the button; -1 = FF = TRUE 0049EC99 6A FF PUSH -1 0049EC9B . 56 PUSH ESI 0049EC9C . 8B0E MOV ECX,DWORD PTR DS:[ESI] 0049EC9E . FF91 8C000000 CALL DWORD PTR DS:[ECX+8C] Then only need keygen it.
deurus 22. Mar 2012	Evolution please help us with the algo
deurus 22. Mar 2012	Evolutio please put an example of name/serial

excrek's crackme #1

Download excme1.zip, 204 kb (password: crackmes.de)
Browse contents of excme1.zip

serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 16. Apr, 2002
Downloads: 2781

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Solutions

Solution by Ben, published 20. nov, 2002; download (3 kb), password: crackmes.de or browse.

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external's Kaine #5

Download Kaine_5.zip, 409 kb (password: crackmes.de)
Browse contents of Kaine_5.zip

Kaine #5. I heard it's hard :)

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: C/C++

Published: 30. Jan, 2011
Downloads: 180

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Discussion and comments

mm10121991 30. Jan 2011	very Hard from Kaine and beatrix^fret solved it
apuromafo 31. Jan 2011	is difficult, but is solved, is necesary upload a english version(Eng) from beatrix (francre) or trying google and dowload that..
apuromafo 20. Feb 2011	sol webpage: Kaine#5 - solution du crackme - 12 juillet 2005 Je vous propose ici un article détaillé qui explique le fonctionnement du crackme de Kaine, le Kaine#5. Au menu : layers, crc, redirections d'imports, tricks (inédits !) anti-debuggers ring3, tricks anti-SI, drivers de protection, machine virtuelle avec pcode obfusqué etc... vous l'aurez compris, il s'agit d'un crackme phénoménal ! beatrix2004.free.fr/K5.pdf 6.23mb http://beatrix2004.free.fr/K5.rar 399kb english traduction Beatrix2004 : Kaine # 5 - solution crackme - July 12, 2005 I offer here a detailed article that explains how the crackme Kaine, Kaine on # 5. The menu layers, crc, redirects imports, tricks (unreleased!) Anti-debuggers ring3, tricks anti-SI protection systems, virtual machine with obfuscated pcode etc. ... you'll understand that this is a phenomenal crackme! //greetings Apuromafo
tamaroth Moderator 21. Feb 2011	Yes, we know it has been solved. This doesn't help great number of us, because the tutorial is in french. As sad as it may be for you, most of us don't speak french. We'd prefer tutorials in english where most of the users can read and understand them.

external's The Three Headed Seamonster

Download seamonster.zip, 7 kb (password: crackmes.de)
Browse contents of seamonster.zip

Worth 400 gold in the HACK.LU 2010 CTF.

Difficulty: 6 - Hard, for very professionals only
Platform: Windows 7 Only
Language: Assembler

Published: 30. Jan, 2011
Downloads: 166

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

nocr
03. Feb 2011

So just as you were thinking of what to do with the free evening
because those easy-measy 400Peasy would be yours in a second...

Ring3 - The Three Headed Sea Monster, the only creature in the seven
seas that even Captain Redbeard is afraid of
appears just in front of your mighty pirate-boat

=>
^^ | Ww
______________ ..
( ____ ) (--)
) ( oo ) ) ++) / | _(++)
^^ ) 8 |==| 8 ) == _\ ( | /|{--}
/ ::. \ / | WW\ \ | | / / |
(__..._.._._____.) \ \ | / /
|| . ) |) / )
|| I | | / |
\\ * --- | ---- // | / /
~ ~ \\ ---- | --- // / /
~~~ ~~~ ~ \ --- | -.-/ ~~ | )
~~^^~ ~^^^~/~^^~ ~~~~~~ : ~~~~~
~~~~~~ ~\~~^^^^^~~

Ring3 T.T.H.S.M.> 3*GrrrgRrrrr, any last words before I eat yo ship?
Ring3 T.T.H.S.M.> Mrrrmmmmmpffff!
Ring3 T.T.H.S.M.> Tasty :)Ring3 T.T.H.S.M.> Nooooo, that is not fair! I AM scaaaary!
Why is nobody afraid of Ring3 these days? Just take your 400P leave me alone :'(

xylitol
18. Feb 2011

sol:
http://esec-lab.sogeti.com/dotclear/index.php?post/2010/11/21/Hack.lu-CTF-challenge-12-write-up

Ezéqui3l's Eval N°4

Download Eval_4.zip, 116 kb (password: crackmes.de)
Browse contents of Eval_4.zip

Hello everybody,

This is my new Keygenme

rules:
fund a valid name and serial
Tools :
Everything you want

Greetings:

Dynasty
Virtualabs
Kaze
Baboon
Squallsurf

and others.

Have fun

Ezéqui3l
www.deezdynasty.xdir.org

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 22. Jan, 2008
Downloads: 501

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by Computer_Angel, published 27. jan, 2008; download (12 kb), password: crackmes.de or browse.

Computer_Angel has rated this crackme as quite nice.

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Discussion and comments

Computer_Angel 28. Jan 2008	Nice calculation. But there's a bug for username=5chars

f0dder's crackme #1

Download f0d_crackme1.zip, 42 kb (password: crackmes.de)
Browse contents of f0d_crackme1.zip

name/serial

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Jul, 2000
Downloads: 2663

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Solutions

Solution by the+q, published 02. jul, 2000; download (1 kb), password: crackmes.de or browse.

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f0dder's crackme #2

Download f0d_crackme2.zip, 82 kb (password: crackmes.de)
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name/keyfile

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Jul, 2000
Downloads: 2433

Rating

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Solutions

Solution by cronos, published 02. jul, 2000; download (50 kb), password: crackmes.de or browse.

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Solutions

Solution by REA-CrAcKeRtEaM, published 06. dec, 2004; download (62 kb), password: crackmes.de or browse.

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Solution by zombie8, published 20. nov, 2004; download (75 kb), password: crackmes.de or browse.

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Solution by gadhabi, published 17. nov, 2004; download (35 kb), password: crackmes.de or browse.

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Solution by ManWithNoName, published 16. nov, 2004; download (2 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

PiCkLeD 03. Jan 2006	Any newbies wanting to learn, I recommend REA-CrAcKeRtEaM tutorial (the rest were not that great), it is the most accurate and points out good learning value info.
balexis 11. May 2010	Would've been cool if all usernames could be mapped to a valid serial.
h3x_ 07. Feb 2011	I would love to say awesome work to REA-CrAcKeRtEaM. You did a fine (or is it excellent) job on this keygenme.
cdx_net 09. Mar 2012	find the register call,and modify the return value. crack it.
VectorEQ 16. Jan 2013	didnt keygen it but cracked it, enjoyed it none the less :)
paimei 09. Apr 2014	Chr -> Nice trick
botanyaki 09. Apr 2014	thank you. this crackme ggave me the confidence for reverse engineer.
edza 27. Nov, 08:47	I made a video solution for this crackme. https://www.youtube.com/watch?v=lXxO6piXfpw It contains a fully commented IDA Pro database file. The video quality is not perfect, but it delivers all the info you need to crack this. Including some explanations about unknown Pascal procedures you will encounter.

falcon's crackme #7

Download falcon_crk7.zip, 254 kb (password: crackmes.de)
Browse contents of falcon_crk7.zip

serial

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Jun, 2000
Downloads: 2012

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Solutions

Solution by tscube, published 01. jun, 2000; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

Falcon1's Falcon1Crackme1

Download Falcon1Crackme1.zip, 4 kb (password: crackmes.de)
Browse contents of Falcon1Crackme1.zip

All you have to do is find out which one of the 84 buttons is the right one that invokes the serial checking routine... And (of course) write a valid keygenerator or find the correct serial for your name... Have fun!!!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 24. Aug, 2005
Downloads: 1783

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by Ox87k, published 27. aug, 2005; download (48 kb), password: crackmes.de or browse.

Ox87k has not rated this crackme yet.

Solution by NoRG, published 27. aug, 2005; download (18 kb), password: crackmes.de or browse.

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Solution by _HellDashX_, published 27. aug, 2005; download (10 kb), password: crackmes.de or browse.

_HellDashX_ has rated this crackme as quite nice.

Solution by deroko, published 27. aug, 2005; download (33 kb), password: crackmes.de or browse.

deroko has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

deroko 24. Aug 2005	I tought that dll has much more to do but... this was interesting crackme =)
T[9]Uvatha 24. Aug 2005	As deroko said, real interesting crackme, was fun to play with the 84 buttons :) lol
deroko 25. Aug 2005	don't tell me that you have pressed each one of them =)))
Ox87k 27. Aug 2005	i submit my solution
deroko 27. Aug 2005	well I guess you are not the only one =) 15 solutions in queue and I submitted mine 30mins after I've downloaded this crackme =)
Ox87k 27. Aug 2005	ehehe it's so easy so more people, i think, solve it! It's for newbie but is very funny :) yeah, i've been more to write the tutorial that to reverse the crackme! (sorry for english!)
deroko 27. Aug 2005	yah, I loved that dll checking, so solved it in both ways =)
Ox87k 28. Aug 2005	bah.. but the dll isn't important... it's not necessary for a worked keygen.
Synsia 28. Jul 2010	thanks, i enjoyed it. :)

Falcon1's Falcon1Crackme2

Download Falcon1Crackme2.zip, 328 kb (password: crackmes.de)
Browse contents of Falcon1Crackme2.zip

This is a keygenme with some(or many) nags...
Register the app with a username and its corresponding serial so that the nags are removed (or remove them on your own!!!) : )

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 25. Aug, 2005
Downloads: 1042

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by deroko, published 27. aug, 2005; download (373 kb), password: crackmes.de or browse.

deroko has rated this crackme as boring.

Solution by EsKiMo, published 27. aug, 2005; download (330 kb), password: crackmes.de or browse.

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Discussion and comments

TQN 25. Aug 2005	Hi Falcon1 ! "Haha, I tricked you!!!\r\nRegistering the program won't remove any nags!!!\r\nRemove them on your own!!!". So we should remove the nag by patching, not by keygenning, or we shoud submit the keygen and the patch ?
Falcon1 Author 25. Aug 2005	Hi the nags should be removed by patching Have fun!!!
deroko 25. Aug 2005	have fun =) where is fun removing all of them, but I'll write patch latter to skip Nag messages...
deroko 26. Aug 2005	blah, patched all nags in 10 lines of asm code =)) just to write keygen =)
deroko 26. Aug 2005	huh finaly keygened it... removed nags... and keygening wasn't fun at all..... so many cases 1 or 2 byte "hash"...
deroko 26. Aug 2005	solution submitted + keygen + unanged dump + keygensrc + patch_src...
TQN 26. Aug 2005	Hi deroko ! You are realy fast and good. But, how can you patch the crackme with 10 lines of asm code ??? I think you patched the Delphi VCL function Dialogs::MessageDlg. As I know, the nag will be called at 6 positions: - TForm2.Image2Click: Wrong and Good passwod - TForm2.FormShow - TForm1.FormCreate - TForm1.Load1Click - TForm1.FormClose - TForm1.Save1Click Regards,
T[9]Uvatha 26. Aug 2005	wow... those nags are such a pain in the as*.. just opened the crackme and saw those awful nags lol... well... cracking time I guess :P
deroko 26. Aug 2005	well I wrote simple checking app in 10 lines and just patched procedure responsible for showing Windowses (Nags), but NAGs are not big problem, bigger problem is keygening, it is not hard but is really anonying... it took me about 1h to rip 2nd procedure responsible for keygen =) you will see =)
Falcon1 Author 26. Aug 2005	The crackme was meant to be annoying :) Sorry guys, but that's how this crackme is :)
deroko 26. Aug 2005	TQN, I really don't know name of that procedure in Delphi style =( All those stuff are just asm instruction for me and nothing more, I've just used DeDe to find where click to image leads and from there everything is done from Olly and by analyzing calls...
TQN 26. Aug 2005	Hi Falcon1 ! I have sent two solution (crackme1 and crackme2) to your mail in your homepage. Did you receive them yet ?
Oorja-HalT 27. Aug 2005	Hi Deroko I'd certainly be intrested to learn how you could possible patch the nags besides ofcourse noping each and every nags because the same is message dialog is used for the reg result message. BTW the algo aint that complicated or annoying as it seems to be
deroko 27. Aug 2005	Hi Oorja, yes, it is always same proc but never same message =) If you want, I can send you patch to pm =)

Falcon1's Falcon1Crackme3

Download Falcon1Crackme3.zip, 179 kb (password: crackmes.de)
Browse contents of Falcon1Crackme3.zip

Hi,
this is the 3rd one...

not difficult at all...

just a few anti-debugging tricks...

and a keyfile...

Have Fun!!!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 17. Jan, 2006
Downloads: 1010

Rating

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Solutions

Solution by Ox87k, published 19. jan, 2006; download (50 kb), password: crackmes.de or browse.

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Solution by KrasivayaSvo, published 19. jan, 2006; download (32 kb), password: crackmes.de or browse.

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Solution by Kerberos, published 19. jan, 2006; download (41 kb), password: crackmes.de or browse.

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Send a message to fatalerr0r »

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Discussion and comments

Kerberos 17. Jan 2006	Nice crackme with simple encryption/decryption rutine.
D4ph1 17. Jan 2006	Nice one but i think the difficulty should be 1 :)
D4ph1 17. Jan 2006	Also I think there is a bug. When the keyfile doesn't contain anything the counter keeps increasing until program crashes! ;)
Falcon1 Author 17. Jan 2006	Thanks.. Difficulty 1?I uploaded with the difficulty set to 3, the mods set it to 2... Anyway I don't believe that it is suitable for total newbies(that's why I selected 3)...u may be right though.... About the bug:u are right...
Ox87k 18. Jan 2006	yeah, nice crackme... but i'm too late... :( i finished to write my keygen only now... so time to write a tute and u have also my solution (if mod approve it!)

acruel 17. Feb, 00:08	you'll need Visual C++ redistributable package 9.0.21022.8
flaghunter 19. Apr, 07:44	it does not run on window xp

fatalerr0r's BuckYs CrackMe 1.0

Download BuckYsCrackMe1.0.zip, 18 kb (password: crackmes.de)
Browse contents of BuckYsCrackMe1.0.zip

BuckYs Crack Me #01

Goals:
Enable Button
Find the password
Patch the prog : )
Write Tutorial

This is my first crack me so tell me what you think.

Have fun

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 22. Feb, 2006
Downloads: 549

Rating

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Solutions

Solution by Dahaka, published 24. feb, 2006; download (3 kb), password: crackmes.de or browse.

Dahaka has rated this crackme as nothing special.

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Discussion and comments

Dahaka 24. Feb 2006	Just never use IF again.

Fatih54102's Math Keygenme

Download Simple_Keygenme.zip, 4 kb (password: crackmes.de)
Browse contents of Simple_Keygenme.zip

You must know math to solve this keygenme.
Written in VB.
Not Obfuscated or MD5 hashed.
---

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 10. Mar, 2012
Downloads: 912

Rating

Votes: 5
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by Kostya, published 21. apr, 2012; download (4 kb), password: crackmes.de or browse.

Kostya has rated this crackme as boring crap.

Discussion and comments

mausy131 20. Apr 2012	Hi, I entered 999999999999999 just to try something and see if there was a bad message but it said gratz!
Kostya 21. Apr 2012	Btw, u can enter 7777 or 77777 or 77777777 or (534)999 and it will also work. It's boring a bit. It has a lot of keys with any length. There is no bug but it is the key to understand what it is.

Solution by norpius, published 22. apr, 2005; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

stejkenzie 05. May 2013	I am sorry, but what exactly am I supposed to achieve? I've got working keygen, when I enter the code it locks the "Register" function - but the "Go!" function still compains about not being registered user. It is supposed to print something else, I believe?
stejkenzie 05. May 2013	Sorry for the question - I found it already ;)
whitehat.panda 09. Feb 2015	Thanks for your CrackMe, i like it!!! So funny (y)

Fatmike's Fatmike's crackme #3

Download Patrick.zip, 236 kb (password: crackmes.de)
Browse contents of Patrick.zip

Have fun with my third crackme! Everything is allowed, but the main goal is to detach the exe from the protection dll. See more information in the 'About' box.
Tested on WinXP SP2

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 24. May, 2006
Downloads: 925

Rating

Votes: 9
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by X-Treem, published 22. jul, 2006; download (191 kb), password: crackmes.de or browse.

X-Treem has rated this crackme as quite nice.

Send a message to fcktrl »

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Discussion and comments

thehyper 25. May 2006	Nice crackme. But it is too easy to detach dll when you are using softice :)
Fatmike Author 25. May 2006	Thanks! Yes i know. I should have called it antiolly.dll :)
SUB Z3R0 28. May 2006	Was Nice ! http://subzero.shabgard.org/FatMike3Cracked.zip
kao 29. May 2006	I want to do it without SoftICE, so I have to think a bit.. Really nice! :))
ricnar456 04. Jun 2006	very good crackme http://www.ricnar456.dyndns.org/Upload/Patrick.rar user:hola pass:hola unpacked and cleaned the dll in OLLYDBG. Very Good Work
ricnar456 04. Jun 2006	in FTP ftp://www.ricnar456.dyndns.org/Upload/Patrick.rar user:hola pass:hola unpacked and cleaned the dll in OLLYDBG. Very Good Work Ricardo Narvaja
Fatmike Author 04. Jun 2006	Good job! Are you going to write a tut?
ricnar456 05. Jun 2006	yes iÂ´m writing now Ricardo Narvaja
ricnar456 08. Jun 2006	is submitted 7/6 i think in any moment will be accepted and displayed. Ricardo Narvaja
ricnar456 08. Jun 2006	http://rapidshare.de/files/22550289/SOLUTION_TO_FATMIKE.rar.html this is the solution while is accepted can be readed from this link. Ricardo Narvaja
Fatmike Author 08. Jun 2006	thanks ricardo for your great tut. im going to ask someone to translate the long spanish tut.and of course...im going to fix the simple method first ;) greets fatmike
ricnar456 08. Jun 2006	thanks for your great crackme, i spend a great time trying and learning with it, is a good piece of protection antiolly. Ricardo Narvaja
hardcoder 17. Jun 2006	@Ricardo Who gave it to you???? me / arjuns lol
ricnar456 18. Jun 2006	hehe thanks arjuns, you give me the crackme, and iÂ´m writing the second part, for crackslatinos, my solution was rejected here. (spanish is not accepted) Ricardo Narvaja
ricnar456 24. Jun 2006	well i complete the second part of the tutorial in spanish and running in OLLYDBG from the start till the OEP of the second process and correctly decrypted, repared, clean the dll, and defeat completely the protection all in OLLYDBG from start to end. Ricardo
Fatmike Author 24. Jun 2006	Thanks ricardo. Can you upload part1 and part2 (and small english tut maybe) on rapidshare ? Fatmike
Fatmike Author 24. Jun 2006	@Ricardo: On which site do you publish your tuts?
ricnar456 24. Jun 2006	http://rapidshare.de/files/23934701/47-INTRODUCCION_AL_CRACKING_CON_OLLYDBG_PARTE_47.rar.html I have a question for you, i solve completely the crackme and find the CreateFileA problem and solve, the question is, the CreateFileA trick with the error of sharing is a bug of OLLY? was deliberate produced, or was accidental, i have not find info of this problem of OLLYDBG with CreateFileA and sharing. (or was produced for the filemapping?) I think is a OLLYDBG bug, the bad response in this api and the error of sharing, can you tell me for personal information? Thanks Ricardo Narvaja Ricardo
ricnar456 24. Jun 2006	http://rapidshare.de/files/22321746/INTRODUCCION_AL_CRACKING_CON_OLLYDBG_PARTE_46.rar.html part 46 ricardo
Fatmike Author 25. Jun 2006	hi ricardo, thanks for uploading your tut! About the CreateFileA thing: No, i did not know about the problem of CreateFile with FILE_SHARE_READ. Again, on which webpage do you publish your tutorials? I could not find on crcklatins... greets fatmike
ricnar456 25. Jun 2006	well you find a very antiolly nasty trick hehe, was very hard for find this problem. i have a http in my machine for all tutorial of craklatinos http://www.ricnar456.dyndns.org/ http://ricnar.no-ip.org/ user:hola pass:hola ftp://www.ricnar456.dyndns.org/ ftp://ricnar.no-ip.org/ user:hola pass:hola for the parts of the introduction to cracking from zero in OLLYDBG, this is the link http://ricnar.no-ip.org/CRACKING/INTRODUCCION%20AL%20CRACING%20CON%20OLLYDBG%20DESDE%20CERO/ there are a folder with any machine translated tuts of this parts. and the turtorials of crackslatinos team http://ricnar.no-ip.org/CRACKING/NUEVO%20CURSO/TEORIAS/TEORIAS%20NUMERADAS/ with the same user y pass:hola be patient with the http and ftp, is in my machine and i rebbit, and use, and in moments is down. Thanks for all ricardo narvaja
ricnar456 30. Jun 2006	http://storage.ricardonarvaja.com.ar/web/ this is my new page the ftp and http of my machine are out. iÂ´m uploading all to this and building a page Ricardo Narvaja
Fatmike Author 07. Jul 2006	lol ricardo, nice pic on your homepage http://www.ricardonarvaja.com.ar/ricnar.jpg patrick looks dead, but he's not...he will come back...;)
ricnar456 07. Jul 2006	is not mine a cracklatinos member send to the list, and is very cool for this reason i put in the page is a good work. Good new patrick return was a good work, nice crackme i learn a lot from this crackme. ricnar456
Fatmike Author 26. Jul 2006	Hi X-Treem, thanks for your solution! I have seen a similar solution before, i will have to work on that :)
X-Treem 26. Jul 2006	you are welcome :) great crackme i had to swear a lot befor thinking o that and... lol i was quite drunk when i made it :) that's why so messy. ricnar one is great, but removing write flag from data section and using olly as JIT debugger is not working for me. Buh thx to you for you crackme

fcktrl's fk1_crackme

Download fk1_crackme.zip, 389 kb (password: crackmes.de)
Browse contents of fk1_crackme.zip

Allowed keygen, patches, any other or all together.

Protection: License file.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 04. Feb, 2013
Downloads: 397

Rating

Votes: 4
Crackme is boring.

Rate this crackme:

Solutions

Solution by iSSoGoo, published 12. mar, 2013; download (56 kb), password: crackmes.de or browse.

iSSoGoo has rated this crackme as quite nice.

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Discussion and comments

iSSoGoo 07. Mar 2013	Keygen is ready, will write a tutorial on friday ;)
iSSoGoo 07. Mar 2013	Keyfile: http://pastebin.com/eM0DLU1W
fcktrl Author 08. Mar 2013	iSSoGoo, you cool! :)
thanhbebi17 19. Dec 2013	@iSSoGoo Keygen by C/C++ please

Fego's Eazy Peazy CrackME

Download SerialMe.zip, 2 kb (password: crackmes.de)
Browse contents of SerialMe.zip

Your Goal is to find the correct serial for the CrackME.
Honestly i dont know how hard it can be so try it out your self and let me know.
Written in pure Assembly using MASM.

For anything (really anything) contact me at

federicogorla at hotmail dot com

I'll see ya!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 23. Apr, 2011
Downloads: 488

Rating

Votes: 3
Crackme is boring.

Rate this crackme:

Solutions

Solution by promix17, published 31. may, 2012; download (7 kb), password: crackmes.de or browse.

promix17 has rated this crackme as nothing special.

Send a message to Feltzkrone »

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Discussion and comments

Coccinell 25. Apr 2011	I have coded a brute force for each parts. Serial for example : RuW^M1q\
idid231 25. Apr 2011	Yes, i think only use brute to solve this crackme!
Fego Author 25. Apr 2011	Yes brute force is the only way! ;) Upload your solution so i can see what you did! Btw: there are more than one valid serial
Coccinell 25. Apr 2011	yes, they are many serials :) just rip the asm algorithm, it's simple :)
Fego Author 26. Apr 2011	i know i coded myself lol! just wanted to see your code :)
da$mu 26. Apr 2011	And how to find the serial without brute force? I think there has to be another way, too (the serial has to be created anywhere/ anyhow?)
Fego Author 29. Apr 2011	no only bruteforce :)
ykJIoHucT_xD 31. Mar 2012	nice crackme=) 1X=a:m9U 1X=a;7<d 1X=a;A<2 1X=aM1q\
promix17 29. May 2012	I've made tutorial, comming soon. GdhpfetQ R53tgoxx xxFePbnK l7oLfoto
ranyeva 06. Jun 2012	Radical option :D 00401150 JE 0040120F NOP
temp001 28. Aug 2012	This was nice. thank you

Feltzkrone's plock

Download feltzkrone_plock.zip, 8 kb (password: crackmes.de)
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try to decrypt included "message.txt"

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 08. Oct, 2002
Downloads: 741

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fenoloji's fenoloji checkboxme

Download fenoloji_crackme.zip, 18 kb (password: crackmes.de)
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Write a bruteforcer.
Please send me your screenshot to my email at
"fenoloji@hotmail.com"

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 28. Oct, 2009
Downloads: 422

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Solutions

Solution by redoC, published 18. may, 2010; download (60 kb), password: crackmes.de or browse.

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Discussion and comments

konglong 29. Oct 2009	clue 404010->404017 need to be value 1.
fenoloji Author 31. Oct 2009	I receive first solution from pxor. Congrats Pxor. Congrats.
fenoloji Author 31. Oct 2009	I receive second solution from HMX0101. Congrats HMX0101. Now, you might publish solution add bruteforcer.
redoC 16. May 2010	I posted solution but no response from moderators.
fenoloji Author 22. Jun 2010	I have seen solution now. Good job redoc. Congrats. You are very successful.

fenoloji's Keygenme

Download keygenme7.zip, 6 kb (password: crackmes.de)
Browse contents of keygenme7.zip

Find the correct serial.
No Patch.

Happy keygening.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 31. Jan, 2010
Downloads: 458

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Solutions

Solution by blzbb, published 05. feb, 2010; download (126 kb), password: crackmes.de or browse.

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Discussion and comments

obnoxious 01. Feb 2010	Why is it that people really hate following rules?
blzbb 01. Feb 2010	if your intent is about putting serial here, sorry for this i didn't know this is against the rule. so i also submit a solution.
alex_ls 01. Feb 2010	blzbb, can't help waiting for your solution, 'cause i have no idea how to solve it in an usual way just brutforce 7 digital key with MD5 algo.
s0l_ir0n 02. Feb 2010	this is not keygenme! it's stupid MD5bruteforceMe =\\
fireblast 04. Feb 2010	Seriously ... what is the point of having a hash to be bruteforced? ... Patching is the way here for me (no point of wasting CPU cycles to pass a simple hashing + strcmp).
fenoloji Author 05. Feb 2010	Thanks blzbb for good solution.
SimpleData 06. Feb 2010	Fenoloji kullanıcı adından tahmin etmiştim, string'ler emin olmamı sağladı. Türksün sanırım. :) ------------- It is his native language. Sorry for any inconviniences. :)

Fereter's CrackMe by Fereter #1.

Download crackmebyfereter.zip, 1 kb (password: crackmes.de)
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An easy crackme for Windows. It implements a simple protection against debugging and against binary patching.

The goal of this exercise is to patch this executable file in order to any password was accepted.

This crackme is the first I made, so please be tolerant of my skills.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 10. Dec, 2015
Downloads: 519

Rating

Votes: 5
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Solutions

Solution by Mike_Cheb, published 09. feb, 2016; download (13 kb), password: crackmes.de or browse.

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Solution by deibiz_xxl, published 09. feb, 2016; download (3 kb), password: crackmes.de or browse.

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Solution by klefz, published 09. feb, 2016; download (3 kb), password: crackmes.de or browse.

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Solution by FedeWar, published 09. feb, 2016; download (662 b), password: crackmes.de or browse.

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Solution by ivvei, published 09. feb, 2016; download (120 kb), password: crackmes.de or browse.

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Solution by haboustak, published 09. feb, 2016; download (1 kb), password: crackmes.de or browse.

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Solution by _HellDashX_, published 09. feb, 2016; download (6 kb), password: crackmes.de or browse.

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Solution by acruel, published 09. feb, 2016; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

batman10 22. Dec 2015	My solution http://antzor10.blogspot.ru/2015/12/crackme-by-fereter-1.html to crackmes.de upload later
Minuscule 24. Dec 2015	it was fun thanks :) (PS: there's a typo with the correct number text)
hutk66 30. Dec 2015	easy & very fun thanks
deibiz_xxl 02. Jan, 11:53	It showed me an antidebug trick that I did not know...
deibiz_xxl 02. Jan, 11:54	BTW, this crackme needs at least a Pentium processor to work.
Shephard 04. Jan, 08:23	Great and well-made crackme. Thanks
Astropilot 29. Nov, 17:59	Pretty easy just one byte to change :) But quite nice :)

Fereter's CrackMe by Fereter #2

Download CrackMeByFereter#2.zip, 2 kb (password: crackmes.de)
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The CrackMe has a protection from static analysis (crypted strings, complex logics of execution, some hidden API calls), anti-debug, a light protection against patching.
The goal is either to patch CrackMe so it accepted any data or to create a KeyGen.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 25. Aug, 2016
Downloads: 594

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Solutions

Solution by Taliesin, published 20. oct, 2016; download (55 kb), password: crackmes.de or browse.

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Solution by acruel, published 20. oct, 2016; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

beaver 31. Aug, 06:22	I avoid anti-debug protection. and find place there serial has calculate. But cant find where username processed. First SendMessage call doesn't returns anything.
beaver 01. Sep, 06:42	ha-ha, its a nice trick with IsDebuggerPresent
donnie 04. Sep, 08:58	After NOPing the entire byte-check, you can easily apply CC bps and also bp on SendMessage. Then also NOP all the jnz and je in the windproc after the cmp command (you'll know after studying it a bit). Now it always shows Registered, no matter what you enter for name and serial. Loved the programming. Very clever :)
SV Reverser 12. Sep, 12:44	0040245A \| cmp eax,0 \| 0040245D \| jne crackmebyfereter#2_.svz.4024F8 \|
Taliesin 17. Oct, 06:13	Submitted solution and keygen. Hopefully they'll be approved without issue.

Fergo's F3rGO Challenge 1

Download f3rgo_chl1.zip, 16 kb (password: crackmes.de)
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My first crackme, coded in VB6. Its specially for newbies and involves a lot of basic tasks.

TASKS:
-Anti-Anti-Debug
-Enable Register Buttons
-Fish for serial or patch
-Remove the nag

Hope you like it ;D

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 18. Nov, 2006
Downloads: 924

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Solutions

Solution by Rufo, published 23. nov, 2006; download (19 kb), password: crackmes.de or browse.

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Solution by Ank83, published 23. nov, 2006; download (220 kb), password: crackmes.de or browse.

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Solution by movzx, published 23. nov, 2006; download (19 kb), password: crackmes.de or browse.

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Discussion and comments

fatzbitz 18. Nov 2006	Enable Register Buttons --> it is enabled !!!
zairon Moderator 18. Nov 2006	Fixed
Fergo Author 18. Nov 2006	Thanks fatbitz for telling me this, and thanks to zairon for re-aproving the crackme so quickly. Hope this was the last error.
mucki 20. Nov 2006	-Fish for serial or patch -> no keygen? patch = selfkeygen or goodboy jump? hm... i need 5 min to solve the tasks (without keygen / only phishing) i don't know if i understood something wrong
Mazrock 20. Nov 2006	Fixed too, i'll send you my submission. i don't think i'll write a keygen...
Rufo 20. Nov 2006	I've managed to remove the anti-debug and nag without problem. However, when I patch $6CD5 from 00 to 01 to enable the button, it seems to work but clicking the button does nothing. Same problem when enabled using vbreformer. Any ideas?
Fergo Author 20. Nov 2006	Yes, but thats ok Rufo. I didn't used msgbox or something like that to make the crackme a little more difficult ( but it still very easy ). Thanks to all of you ;D
HMX0101 20. Nov 2006	Search with HexWorkshop, this string "Register" and change the 12th byte to 01...
ProTreeBrain 21. Nov 2006	Seems to be a nice crackme, I try it today. For Fergo: TRy make something in Assembler. If you try, you will see what I mean. After the 5 or 6 lines of code (algorithm to serial generate) you will totally confused, if you wont make a comments. Assembler is totally hard for physical-memory in my head.
ProTreeBrain 21. Nov 2006	I need probably at least 20 TB(Tera-bytes) of memory.
BaKaE 21. Nov 2006	20 tera-byte om my good, thiz little vb-crackme needs so much?? i did a failure, proTreeBrain
Rufo 21. Nov 2006	My submission sent. Note that if the name you enter is 4 characters or fewer, the register button appears to be broken (silently fails). Caused some confusion on my part...
Fergo Author 21. Nov 2006	Thanks! Yes, there's a check for the lenght of the name. I've stared prgramming in asm a month ago, but i'm not ready to make a crackme on it :D
ProTreeBrain 22. Nov 2006	For BaKaE: I do not need 20 TB to this crackme, I only explain the ASM programming to Fergo, because he saz that is a beginner.
movzx 22. Nov 2006	ProTreeBrain : "I need probably at least 20 TB(Tera-bytes) of memory." you mean, it's your physical memory in your head right?? not in your PC.. :D
snorkelsnot 22. Nov 2006	Well that was all pretty easy, except for enabling the button, for which i had to cheat using the comments here. Where can I find more info on enabling buttons?
nmr666 22. Nov 2006	For HMX0101, how did you figure 01 out? it is the only bit that has got me
Fergo Author 22. Nov 2006	The state of the button comes right after the button size and after a byte "08". The button size is easy to discover, but its a lot easier to search for the 08 byte after the "Register" string.
musically ut 23. Nov 2006	Um.. A silly question, I guess, but does anti-debug mean that it can detect Olly, or does itextend to mean that it cannot be disassembled easily? I tried doing it with one and it failed. I wanted to know whether there is something wrong with the disassembler or is the program really "ANTI-debug"...
Rufo 23. Nov 2006	I disassembled it with both Olly and IDA without problem; I think 'anti-debug' referred to the fact it detects that Olly is running.
SpiderZ 31. Oct 2009	very old crackme but good.

idid231 28. Feb 2012	FPU? Can i have some working number? I tested but no success.
HMX0101 02. Mar 2012	I think only have 1 sol. Its a 'simple' equation, VB make it look worse, yeah.. but still isn't that hard :p
Samuirai 07. Mar 2012	I have a lot of solutions but had to bruteforce them, because of the floating point accuracy with different languages.
darkelf 17. Mar 2012	Why was my comment deleted? I didn't spoil the solution but I've only written the output, the crackme gives when I successfully solved it. What's wrong with that?
Kostya 06. Apr 2012	I like it! Tastes good :))
fireshark Author 25. Apr 2012	glad u like it! :D
v4r14bl3 28. Apr 2012	The solution is 2714.
v4r14bl3 28. Apr 2012	At least, thats what I got in my case :)
v4r14bl3 28. Apr 2012	Input1 > 123 Input2 > 1234 Answer > 2714
Kostya 28. Apr 2012	I can say u only one thing, u have a strange FPU ;)

FireWorx's Crackme 10

Download fire_cm10.zip, 197 kb (password: crackmes.de)
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Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 1942

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Solutions

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Solutions

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Solutions

Solution by kRio, published 25. jun, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by Plasmator, published 24. jun, 2004; download (7 kb), password: crackmes.de or browse.

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fisser's Crackme by fisser

Download Crackme.zip, 10 kb (password: crackmes.de)
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Fish the serial thats all.

Rules:
Just fish dont patch.

leave a comment :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 05. Oct, 2008
Downloads: 843

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by JoKa, published 16. oct, 2008; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

rex922 06. Oct 2008	this does not even run on my machine
fisser Author 06. Oct 2008	@rex922 It will run, you need something try and find out what you need.
JoKa 08. Oct 2008	Fisser: if I press Check again after Good I get Bad. It's normal?
fisser Author 08. Oct 2008	@JoKa Well i made it a one time only try (Restarting the program will allow you to try again) Sorry that i dind not put that in the Description
Juniahh 12. Oct 2008	it doesn't run on my computer either
JoKa 14. Oct 2008	Juniahh,rex922: it runs but exits immediately unless you did something
JoKa 14. Oct 2008	Hint: crackme tries to open some file, if not found crackme exits.
fisser Author 17. Oct 2008	@JoKa Thanks for the great tutorial.
bolrak 25. Oct 2008	Joka- i tried to folow your solution but i didn't understand where did you find the tracs of uinicode "1". i can see in the stack only the "lable12", there is no hint for uinicode "1".
T.0.R.N.A.D.0. 18. Mar 2009	@ Author The crackme searches for "F:\Crackme-28362.dat". If a system has F: unavailable, then one won't be able to crack it EVER ! ( lolz ) Better use ".\Crackme-28362.dat" :) Anyway good crackme for Newbz
power_zhy 08. Aug 2012	@T.0.R.N.A.D.0. It seems not only "F:\Crackme-28362.dat" works. I use a virtual machine to learn crack and use Z:\ as the share folder with host OS, this crackme just try to find "Z:\Crackme-28362.dat"instead.

fisser's KeygenMe by fisser

Download KeygenMe_By_Fisser.zip, 5 kb (password: crackmes.de)
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Find serial for your name.
Make a keygen.
Write a tutorial.
No patching.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 11. Apr, 2008
Downloads: 686

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by kbpower, published 06. oct, 2008; download (3 kb), password: crackmes.de or browse.

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Solution by MACH4, published 14. apr, 2008; download (1052 kb), password: crackmes.de or browse.

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Discussion and comments

MACH4 11. Apr 2008	Hi Fisser, This one was a nice change from the norm! Will submit a solution... MACH4
dom1n00 12. Apr 2008	yeppp, easy to fish serial for my name in 15 sec :)
MACH4 12. Apr 2008	Yes but the keygen took a bit longer! MACH4
fisser Author 12. Apr 2008	oke no idea what to type XD but i am happy you people like it
MACH4 12. Apr 2008	My tute in queue! Although I would like to see any other approach... MACH4
synak 12. Apr 2008	using smartcheck makes keygenning this very simple..:)
apuromafo 12. Apr 2008	mm, i can fish the serial too and the tool used work as keygen.., Make a keygen. this can not do..if like other way for fish vb i upload this if not like, i not upload this..
jvwarrior 12. Apr 2008	How can I reverse this? Reflector only works for .NET so what do I use?
Xspider 13. Apr 2008	it was very very very simple :p
synak 13. Apr 2008	@jvwarrior - numega smartcheck / ollydbg
apuromafo 14. Apr 2008	nice work march4, xD
SlayerOtf 14. Apr 2008	There is a bug on your code, if i dont enter any name and any code, so i can get GOOD message as i am registered. (:
fisser Author 14. Apr 2008	@SlayerOtf: yea i did not see the bug thanks for saying @MACH4: your tutorial is very good, thanks for the great tutorial!
MACH4 14. Apr 2008	Hi Guys, Thanks for the comments! I'm used to asm but Trying to learn VB and VB.NET so when I get time, will hopefully keygen more of the easier Crackmes! MACH4
apuromafo 14. Apr 2008	@SlayerOtf: say that clear the name, and clear the pass press enter and see yes maybe is a bug xD --------------------------- KEYGENME --------------------------- Good --------------------------- Aceptar --------------------------- name:"" //there clear all and see pass:"" //there clear all and see enter understand?
Xspider 14. Apr 2008	MACH4 are you really wan't learn VB :p is too bad
MACH4 14. Apr 2008	Ha! No not really, but C#.NET and VB.NET is getting more widespread now, so need to understand it more! MACH4
Arttomov 06. Aug, 19:06	Arttomov NDYTYNYNKEKVKEYK

fjlj's FJLJ_Crackme#1

Download Crackme#1_FJLJ_attempt2.zip, 6 kb (password: crackmes.de)
Browse contents of Crackme#1_FJLJ_attempt2.zip

ok so this is my first real crackme and i hope it isnt too easy.
i tried to throw in a few "tricks" :) mainly just so that the
noobs that first look at text strings will get very discouraged
quickly. i hope that when this is solved the tutorial will be a
great learning utility for all noobs :). i will be writing a tut
after a number of people have solved it. dont forget to read
the rules included in the zip :)

FJLJ

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: Assembler

Published: 06. Jun, 2007
Downloads: 618

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Solutions

Solution by TiGa, published 15. jun, 2007; download (35 kb), password: crackmes.de or browse.

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Discussion and comments

fjlj Author 15. Jun 2007	nice job! i enjoyed reading your tutorial and i thought i ranked it 3 but ya.. sorry about that one guys ;) i am working on another one currently, i hope to see you trying it out also ;)
TiGa 15. Jun 2007	Thanks Keep submitting crackmes and I'll keep solving them!
Haykuro 27. Jul 2007	nice keygenme i learned a bit from it :) im gonna try and tackle some of your others if you make more :)
fjlj Author 27. Jul 2007	awesome. i try to put in a few things that people might not have seen. and yea i am working on one, but its kinda slow going because i am in the process of moving and junk ;)

fjlj's FJLJ Crackme #2

Download FJLJ_CrackMe#2.zip, 127 kb (password: crackmes.de)
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an empty c++ program full of nops... then i wrote a crackme into it with olly :) its a little out of the box i think :) and i hope you all have fun with it :)

looking for a keygen first. i would also like to see a self keygen. but to patching :)

have fun!

FJLJ

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 16. Nov, 2009
Downloads: 641

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Solutions

Solution by nizammoidu, published 24. nov, 2009; download (7 kb), password: crackmes.de or browse.

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Solution by IamTCM, published 24. nov, 2009; download (65 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

fjlj Author 16. Nov 2009	my personal opinion im sure this should be a 3.. but let me know what you think :)
IamTCM 18. Nov 2009	submission submitted
fjlj Author 25. Nov 2009	grats everyone :) what did you think of the crackme :) i liked your solutions and i hope it was a fun experience for you :)
r-Evolution 04. Sep 2010	nice crackme well done franklinjlj i lkinda like your youtube videos as well :)

fjlj's fjlj_crackme_3

Download New_crackme3.zip, 127 kb (password: crackmes.de)
Browse contents of New_crackme3.zip

A different way to generate a key. Solution is a keygen that will work on multiple computers, not just your own. no patching, and a self keygen would be too easy :). it isnt that hard but it is unique.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 06. Dec, 2010
Downloads: 351

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by draww, published 19. dec, 2010; download (8 kb), password: crackmes.de or browse.

draww has rated this crackme as boring.

Discussion and comments

draww 07. Dec 2010	i found my serial as: name: draww serial: 1692BD5E will write keygen & tut AND yes, it's not that hard but it's unique :D
fjlj Author 07. Dec 2010	:) yea the phishing is very easy, no packing or obfuscation. just a new idea.
blackspark 07. Dec 2010	nice crackme..I submitted the solution :D
NicoPyright 07. Dec 2010	NicoPyright 1847B907
Mayhem 07. Dec 2010	Mayhem 1656BDFD Writing keygen. Nice crackme :D
KcDaRookie 11. Dec 2010	name: KcDaRookie serial: 17B7 (+ xxxx) The serial has a main part and a additinal part.. the main part are the first four chars (being 17B7 for me) which are acutally checked, the xxxx part is not needed but can be up to four random chars..
KcDaRookie 11. Dec 2010	Humm.. strangely this only works with my nick.. wont work on on the other serials posted here...
fjlj Author 12. Dec 2010	and the last 4 are most definitely checked :) lol
draww 15. Dec 2010	no one submitted a tut yet? what happened to blackspark's or Mayhem's tuts?
fjlj Author 16. Dec 2010	they must still be in the queue :)

fjlj's fjlj keygenme 4

Download fjljCrackMe4.zip, 4 kb (password: crackmes.de)
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this is a somewhat difficult keygenme.. it has many twists and turns and a lot of fun along the way :) i think you will all really enjoy it and learn a lot from it...

looking for a keygen only. no self keygenning and no patching :)

enjoy.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 14. Feb, 2013
Downloads: 182

Rating

Votes: 3
Crackme is boring.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

promix17 17. Feb 2013	Can't understand cmp wiht nulls: 0x04014AE REPE CMPS BYTE PTR ES:[EDI],BYTE PTR DS:[ESI]
promix17 17. Feb 2013	Ok, it works in debugger, but without key doesn't work...
fjlj Author 19. Feb 2013	not sure what exactly you are saying. you cant not enter a key lol.. the program wont let you.
promix17 19. Feb 2013	I mean that under debugger I enter a key and it works. But when I enter a key without debugger it doesn't work. Why I can't enter a key?
loizos 01. Mar 2013	hello fjlj since nobody help me with my problem i just wanted to ask you.I am beginner on cracking programs.I want to learn how to crack a program without using reverse engineering.Can you send me any tutorials or just telling me what to use or what to do. -Loizos
fjlj Author 05. Mar 2013	well you cant exactly snap your fingers and have a program be "cracked" the term cracked is used by script kiddies and people who can not reverse engineer... the process of "cracking" a program is properly referred to as "reverse enginnering" so by saying you wasnt to "crack" a program without reverse engineering makes less sense than saying "i want to tie my shoes but without putting knots in the laces." if you havent figured it out by now i dont take too kindly to people that take reverse engineering for granted.
fjlj Author 29. Jun 2013	their is quite a lot of anti debug techniques :)

[Flasher]'s Delphi CrackME

Download crackme_1.zip, 169 kb (password: crackmes.de)
Browse contents of crackme_1.zip

Find the correct Serial!

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Borland Delphi

Published: 30. Dec, 2002
Downloads: 1988

Rating

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Solutions

Solution by _pusher_, published 30. dec, 2002; download (967 b), password: crackmes.de or browse.

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Discussion and comments

spyzzer 07. Jul, 01:36	66511818-630035424

Flatline's Flatline's CrackMe #1

Download Flatline-CrackMe-1.zip, 395 kb (password: crackmes.de)
Browse contents of Flatline-CrackMe-1.zip

A simple CrackMe that should only require a little thought.

Rules

* Both Cracks & Keygens will be accepted (Preferablly one of each)
* No serial fishing
* For a crack solution an explanation of how the algorithm works and why patches were made is required

Enjoy

flatline ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 30. Jan, 2011
Downloads: 577

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by xylitol, published 04. mar, 2011; download (1396 kb), password: crackmes.de or browse.

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Solution by promix17, published 03. feb, 2011; download (406 kb), password: crackmes.de or browse.

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Discussion and comments

promix17 31. Jan 2011	Is selfkeygen allowed?
promix17 31. Jan 2011	Try to send tutorial but file can't be downloaded. Why?
DoDhLo 31. Jan 2011	promix you can't crack without selfkeygen ? Everywhere i go i see "Is selfKeygen allowed ?"
promix17 31. Jan 2011	I teach this way of cracking.
Flatline Author 02. Feb 2011	promix17 Any method is allowed on this one. The only thing you can't do is serial fish. However the ideal crack solution will be two small patches that patch the returns, this is because this is the lesson this crackme is trying to teach, e.g. looking for double checks. ;) idid231 Well done :)
Cooty125 12. Mar 2011	Nice... Cooty 5E449369030B7638EA04B844768940927B567E8A

flipflop's dailycracking by flipflop

Download dailycracking.zip, 5 kb (password: crackmes.de)
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Find out the password and the algorithm and write a little description how you solved it.

No Patching!

Have fun

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 28. Jun, 2009
Downloads: 887

Rating

Votes: 6
Crackme is quite bad.

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Solutions

Solution by br0ken, published 04. jul, 2009; download (21 kb), password: crackmes.de or browse.

br0ken has rated this crackme as quite nice.

Solution by TripleTordo, published 04. jul, 2009; download (46 kb), password: crackmes.de or browse.

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Discussion and comments

KcDaRookie 28. Jun 2009	Have the pw.. maybe I'll write a solution for it later... Was easy, nothing special...
SpiderZ 30. Jun 2009	Very Easy, Pass: Crack01 how to solve: just put the break point on 401379 n type any pass example:123456789 n enter, now u will break on this, now look at registers window ECX ;).
The So;X 01. Jul 2009	@SpiderZ ... Check u r solution again... coz i have ended with different slolun... crackme is not based on single string as pass... it is based on algo
Smack 22. Jul 2009	My Process: Searched for references to strncopy. Saw one, stepped through with Olly Until I saw what looked like a Password in the EBX Register (Crack21). Tried it, it worked. Looked for other interesting calls. Saw "time", and slaped myself in the head. DailyCracking by flipflop. It's the 21st today. Changed date to verify.
$haki 20. Feb 2011	I think password always is Crack(x) where x is a number of a day.

folko's Folko #11

Download folko11.zip, 19 kb (password: crackmes.de)
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An unusual name/serial challenge...

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Feb, 2003
Downloads: 1170

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Solutions

Solution by figugegl, published 22. feb, 2003; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

fornix's Fornix's Crackme 2 (bug fixed)

Download fnxcm2.zip, 7 kb (password: crackmes.de)
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Hard coded serial. Some good tricks. Fixed a small bug.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 27. Dec, 2004
Downloads: 1177

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Solutions

Solution by jack_theripper, published 01. jan, 2005; download (11 kb), password: crackmes.de or browse.

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Solution by therapy, published 01. jan, 2005; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

qwerok 10. Mar 2015	Very good Crackme! Thank you.

fornix's Fornix's First Crackme

Download fornixcrackme1.zip, 43 kb (password: crackmes.de)
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This crackme is machine dependant. I demand a keygen for this

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 03. Sep, 2004
Downloads: 1610

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Solutions

Solution by Solidsounds, published 06. sep, 2004; download (43 kb), password: crackmes.de or browse.

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Solution by Plasmator, published 06. sep, 2004; download (88 kb), password: crackmes.de or browse.

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Solution by xyzero, published 06. sep, 2004; download (22 kb), password: crackmes.de or browse.

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Solution by shvanz0r, published 06. sep, 2004; download (4 kb), password: crackmes.de or browse.

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fortu's KeyGenMe #1

Download KeyGenMe.zip, 215 kb (password: crackmes.de)
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This is a very very hard KeyGenMe.

Try your luck.

Rules are as usual: Don't Patch, write a KeyGen, write a tutorial.

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: Borland Delphi

Published: 06. Mar, 2008
Downloads: 878

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by MR.HAANDI, published 22. mar, 2008; download (650 kb), password: crackmes.de or browse.

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Discussion and comments

MR.HAANDI 07. Mar 2008	maaaan, I hoped for a really good math keygenme, but this one is basic, level 8 is really overrated since it's moving around ~5 compared to others. Suggestion to the author: it would be REALLY more fun if you internally switch the first and the second part of the serial, but I'm relatively sure that you would not know then how to display any message wanted =) However, even if the parts are switched there is a solution, as a prrof: just try "8JWQC6X7QID3ZN464OIMQNZIRXR9VO" in the very first field (in the code/window hack) and "000000000000000000000000000001" as the regular second part of the serial.
fortu Author 07. Mar 2008	Well atleast you are right.. it wasn't that good to use constants intern. But are you sure you've discovered the right solution? I think i can tell the solution: "There is no spoon" So if you haven't found it out yet, go on :]
MR.HAANDI 07. Mar 2008	I mean in its current state it's easy to display any message with 19 characters (see pn for a valid serial). What I'm saying is - to get the right serial one can choose a random first part and has to generate a second part, but it would be much more difficult if the second part would be shorter and the first part would be long as in my suggestion. My serial in the comment "8JWQC6X7QID3ZN464OIMQNZIRXR9VO-000000-000000-000000-000000-000001" is, of course not a valid serial, but if check it, it demonstrates what I'm suggesting.
kcynice 07. Mar 2008	hi,fortu. i want to know if the program support non-english words? I am afraid not! I can't recognise the different message after i typed a sequence of characters and pressed the button! i am not sure is there anybody else having the same problem. ^_^
Ox87k 22. Mar 2008	Awesome solution MR.HAANDI! You are a very skilled reverser, good job! ;)

fr0gsek's fr0g KGM#1

Download KGM#1.zip, 1004 b (password: crackmes.de)
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Algorithm is really easy to understand, understand it and create a keygen ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 25. Aug, 2016
Downloads: 440

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Solutions

Solution by Mithreindeir, published 20. oct, 2016; download (1 kb), password: crackmes.de or browse.

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Solution by icarus, published 20. oct, 2016; download (7 kb), password: crackmes.de or browse.

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Solution by Kaltwa55er, published 20. oct, 2016; download (3 kb), password: crackmes.de or browse.

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Solution by S!x0r, published 20. oct, 2016; download (2 kb), password: crackmes.de or browse.

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Solution by acruel, published 20. oct, 2016; download (709 b), password: crackmes.de or browse.

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Solution by rsumi, published 20. oct, 2016; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

daryl 10. Sep, 20:29	How long does it normally take for a submission to be reviewed by the moderators?
S!x0r 13. Sep, 21:01	This can take a while. Between 2 - 5 weeks. That depends, when a moderator comes online. Sorry for my poor english.
tomkol 14. Sep, 15:48	Optimistic assumption. Previous solutions was accepted in february. Last in august. So I would say 2 - 5 months.
daryl 14. Sep, 22:25	Ah. Thanks. Well I've posted a keygen for this one, hopefully they'll accept it soon.
S!x0r 15. Sep, 08:06	@tomkol My crackmes / solutions were always shared between 2-5 weeks. I can only talk from me. @daryl I have also added a solution.
andrewl.us Moderator 20. Oct, 20:11	https://www.youtube.com/watch?v=4xGAwI10VNM
Fulk33 27. Oct, 15:43	First crackme I ever solved. Feels great :)
x0darap 29. Oct, 21:59	Sadly didn't work for me, because /var/tmp/thegame.serial doesnt exist on my machine. Cool and easy crackme otherwise.
fr0gsek Author 22. Nov, 21:23	Fulk33 : happy to see you had fun :) x0darap : if you don't have the file .. just create it :)
dig404 02. Dec, 07:07	year, this took 1 hour

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Solutions

Solution by onepatop, published 31. aug, 2010; download (567 kb), password: crackmes.de or browse.

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apuromafo 01. Sep 2010	nice solution, greetings :) is a miracle ! xD

freesoul's freesoul's crackme 1

Download Crackme1.zip, 7 kb (password: crackmes.de)
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enable the button and get a correct serial.. and if u want make a keygen ^^

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 21. Jul, 2006
Downloads: 1073

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Solutions

Solution by mucki, published 28. dec, 2006; download (141 kb), password: crackmes.de or browse.

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freesoul Author 09. Sep 2010	Only a girl solved this?? :O ;D joking
Numernia Moderator 15. Sep 2010	=)

freesoul's SerialMe #2

Download FScrackme2.zip, 172 kb (password: crackmes.de)
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Hello! this is my second crackme (keygenme)... it hasn't any protection.. it's only for get a correct serial and if u want make a generator... if u see any bug, please, tell me it at jfkener@hotmail.com, thanks!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 10. Sep, 2006
Downloads: 1788

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Solutions

Solution by hound, published 21. jan, 2007; download (28 kb), password: crackmes.de or browse.

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Solution by gibz, published 19. dec, 2006; download (196 kb), password: crackmes.de or browse.

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Solution by El_PuPaZzArO, published 15. sep, 2006; download (177 kb), password: crackmes.de or browse.

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Discussion and comments

geeko 11. Sep 2006	cannot run in debugger. why? u said no protection
BaKaE 11. Sep 2006	@ geeko it is 10:44 and you crack not in school or at work??
freesoul Author 18. Sep 2006	:S dont know why it doesnt run in a debugger... it really hasnt any protection :S, i can send to the admin the source code if u want...
IronButterfly 02. Nov 2006	I couldn't run it under olly
banshee412 02. Nov 2006	It will run under olly but it is giving lots of memory access violations. You can run it fine if you go to options->exceptions and tell it to ignore memory violations.
gibz 17. Dec 2006	New solution sent, mainly just expands on the old one quite a bit, explaining it and clearing up some bad info. And I included a keygen with source, just for fun :)

frogger's crackme #2

Download f_vbcrackme.zip, 8 kb (password: crackmes.de)
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name/serial/unlock code (vb)

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: (Visual) Basic

Published: 04. Jun, 2000
Downloads: 1554

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Solutions

Solution by ubique.daemon, published 04. jun, 2000; download (8 kb), password: crackmes.de or browse.

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fromTurkey's CodebyTR

Download fromTurkey.zip, 7 kb (password: crackmes.de)
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fromTurkey
Target:

1) No patching! (Newbees)
2) Find the serial! (Bravo)
3) Create a keygen! (Master of crackmes)

NOT: That will be not a constant serial in this program!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 21. Jan, 2008
Downloads: 404

Rating

Votes: 5
Crackme is boring crap.

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Solutions

Solution by The Arctic Imp, published 26. jan, 2008; download (18 kb), password: crackmes.de or browse.

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Discussion and comments

The Arctic Imp 21. Jan 2008	Hmmm.... Intersting... random? _text:00401328 call time ... _text:00401330 call srand ... _text:0040135E call rand ... ... _text:00401410 cmp al, [edx] ; compare serials in loop and how it can be sloved? Or there is some secret? ;)
synak 21. Jan 2008	I don't think there is any secret ... I turned this into a self-keygen .. No way to really validate the codes though, because of the random values/time.
br0ken 21. Jan 2008	Umm, i'm no expert, but from what I understand, this proggie is using system time to calculate a serial and comparing the entered values with genned values. So basically, even if you make a self keygen., the serial isn't gonna be valid the next second. Am I missing something?
synak 21. Jan 2008	you're not missing anything .. it was just a learning experience on self-keygenning for myself.. there is no real solution here, as the valid code for a specific point in time will no longer be valid for future runs..... but at the specific run time, it is the correct serial :)
The Arctic Imp 21. Jan 2008	Loader can be a solution? If yes then its very easy to make... hmmm... LOADER-KEYGEN =) Algo is simply: Load crackme, read Key from memory and print it :p. Another solutions?
The Arctic Imp 21. Jan 2008	or another name of this - Serial Fisher =)
Computer_Angel 22. Jan 2008	char const_hash[35]="a1b2c3d4e5f6g7h8i9j0klmnoprstuvyxz"; time_t mtime=time(0); srand(mtime); int i = 0; while ( i <= 19 ) real_serial[i++] = const_hash[rand() % 34]; The only way is self keygen ^.^
soychino 22. Jan 2008	what a boring crackme,do author know how to write the always valid keygen?
TiGa 22. Jan 2008	It seems that a loader-keygen is the way to solve it. It would have been better if the random number was displayed when opening the crackme.
The Arctic Imp 22. Jan 2008	@do author know how to write the always valid keygen? while (true) puts("+1"); =)))))))
The Arctic Imp 22. Jan 2008	@It would have been better if the random number was displayed when opening the crackme. Done =)
fromTurkey Author 23. Jan 2008	first of all thanks for all your comments and your interests. this would be my fisrt experience. ı write this code in c. there would be a random serial always changeable..:) please send me a solutıon when everone can solve it. ı say that ı will a keygen when it is possible. again thanks for all have a good day...:)
IMPosTOR 25. Jan 2008	its easy to dump pws,i write one can i share the exe link? how can i solve it? i must release the source?
SasukeHa 26. Jan 2008	Lol The Arctic Imp you should be intelegent enough to know that local vars doesn't let you use ReadProcessMemory that's why it'll only work on your computer.
SasukeHa 26. Jan 2008	The Arctic Imp has rated this crackme as boring crap.?!? dude check your solution before you insult this crack i'll post my solution as soon as i find good enough packer
The Arctic Imp 27. Jan 2008	what the fu... i'm test it at my machine and VMWare, the serial was correct... hmm I'm a newbie! don't kick me please =) @dude check your solution before you insult this crack Sorry for my lame solution, i will correct it =) But I'm realy think that this crackme is so stupid =/... for example: make a keygen for this: ------------- randomize; serial := IntToStr(random(10000)); if serial <> entered_serial then ShowMessage('BAD BOY!!!'); ------------- It's not boring crap???
fromTurkey Author 29. Jan 2008	Hi everone. Firstly thanks for everbody who will sends his solution and for all other comments for this crackme. But i would say to "The Arctic Imp" that is if you solve this code it will not be boring anymore.... if you can do this, just DO OR say nothing bad... you say that ; @i'm a newbie! don't kick me please and then you say that this code is borıng and how can you write comments if you are a newbee... thats a contradiction... Please do your thing. Just do...! Much love for the rest of the crackmes members for spending your valuable times for this code. Good Bye.
SasukeHa 01. Feb 2008	@It's not boring crap??? no it's not boring crap even tho it's a simple algo it's not the hard part this crackme is testing how you deal with local and random not with the algo itself, i think just complicated formula won't be interesting as this one i'm posting my solution btw.. SasukeHa
The Arctic Imp 01. Feb 2008	I congratulate you, Mr. the clever man. =)

FrostByte's CrackMe 1

Download frostbyte_crkme1.zip, 4 kb (password: crackmes.de)
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My first VB 6 CrackMe

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 11. Jun, 2004
Downloads: 758

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Solutions

Solution by shvanz0r, published 27. jun, 2004; download (24 kb), password: crackmes.de or browse.

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Solution by xyzero, published 11. jun, 2004; download (16 kb), password: crackmes.de or browse.

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FrostyKid's FrostyKid's Math Crackme #1

Download frosty_mathcrkme1.zip, 123 kb (password: crackmes.de)
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Do whatever you want, just don't patch it. Serial number is the only accepted solution.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 09. Sep, 2004
Downloads: 1336

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Solutions

Solution by Plasmator, published 10. sep, 2004; download (4 kb), password: crackmes.de or browse.

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FrostyKid's FrostyKid's Math Crackme #2

Download frosty_mathcrkme2.zip, 129 kb (password: crackmes.de)
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This crackme is a bit more interesting than my previous one. Again the rules are the same: Find the valid serial number. Do whatever you want, just don't patch it! :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 11. Sep, 2004
Downloads: 1141

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Solutions

Solution by cronos, published 18. apr, 2001; download (10 kb), password: crackmes.de or browse.

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Solution by bl00dbath, published 18. apr, 2001; download (8 kb), password: crackmes.de or browse.

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Solution by nh, published 18. apr, 2001; download (4 kb), password: crackmes.de or browse.

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Solution by smoke, published 18. apr, 2001; download (5 kb), password: crackmes.de or browse.

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Solution by sphinx, published 18. apr, 2001; download (8 kb), password: crackmes.de or browse.

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Solutions

Solution by acid cool 178, published 09. jul, 2000; download (2 kb), password: crackmes.de or browse.

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Solution by frogger, published 09. jul, 2000; download (915 b), password: crackmes.de or browse.

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Solution by dahlia, published 09. jul, 2000; download (2 kb), password: crackmes.de or browse.

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fuzzy cat's crackme #2

Download fcat_cm2.zip, 360 kb (password: crackmes.de)
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matrix, time limit

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. Jul, 2000
Downloads: 2501

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Solutions

Solution by tscube, published 09. jul, 2000; download (17 kb), password: crackmes.de or browse.

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fuzzy cat's crackme #3

Download fcat_cm3.zip, 7 kb (password: crackmes.de)
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name/company/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Sep, 2000
Downloads: 1606

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Solutions

Solution by luucorp, published 16. dec, 2002; download (1 kb), password: crackmes.de or browse.

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Solution by rage9, published 01. sep, 2000; download (12 kb), password: crackmes.de or browse.

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Solution by stealth fighter, published 01. sep, 2000; download (1 kb), password: crackmes.de or browse.

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g0dmoney_'s nibbler

Download nibbler.zip, 27 kb (password: crackmes.de)
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This is a .net crackme, but coded in C++, not C# so hopefully you'll find the tricks interesting. Instructions are simple, unlock this with a key for your name. A keygen is preferred.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 09. Mar, 2011
Downloads: 369

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Discussion and comments

DoDhLo 10. Mar 2011	This crack->me dont work under my xp ? But work fine on vista and 7 .
DoDhLo 10. Mar 2011	There is a trick , I stuck .
g0dmoney_ Author 10. Mar 2011	i tested it under xp sp3, did you make sure you have the vcpp redistributable package installed? the nfo links it if you need it.
DoDhLo 11. Mar 2011	Yeah i downloaded it before testing .
g0dmoney_ Author 13. Mar 2011	not sure, i tested it here, and had a friend test as well. Does it give you any errors?

gabrus666's gabrus666 crackme1

Download gabrus666_crackme1.zip, 2 kb (password: crackmes.de)
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gabrus666 crackme1

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 05. Aug, 2003
Downloads: 1953

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Solutions

Solution by Hybr!d, published 01. jan, 2006; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

sphaaz 06. Mar 2011	well keygen should be easy, found way for generating keys for first and last ones :) still into second and third searching :) interesting one :)
idid231 06. Mar 2011	i don't like you goodboy, it's only show "Press 5 to exit" !!! Why you use loop to show goodboy?
gallows Author 06. Mar 2011	Hmm. Thanks! I''try to harder i think the second crackme will harder
DimitarSerg 02. Jun 2012	Virus.Win32.Sality.bh Wtf ?
codeinject 18. Oct 2012	Same issue here, using Check Point: Endpoint Engine (kaspersky engine). Looks harmless though, the AV-industry should really stop with signature checking. And just implement strong heuristic engines.

gandalf's gc crackme 10

Download gncrk10.zip, 126 kb (password: crackmes.de)
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name/serial/unlock code

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Apr, 2000
Downloads: 1977

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Solution by cronos, published 27. apr, 2000; download (22 kb), password: crackmes.de or browse.

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gandalf's gc crackme 11

Download gncrk11.zip, 154 kb (password: crackmes.de)
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serial (slidebars)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 23. Apr, 2000
Downloads: 2155

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Solutions

Solution by roy, published 27. apr, 2000; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

stars2000 18. Feb 2015	My sophos does not let me download this with detection mal/behav-413
zairon Moderator 24. Feb 2015	The file is clean

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Discussion and comments

KernelJ 23. Jun 2009	I think this crackme is broken...
Ganoes Paran Author 23. Jun 2009	nope it isn't broken, i made a keygen for it...
KernelJ 23. Jun 2009	so did I. But it's still broken if it's meant to be difficulty 3.
papanyquiL 24. Jun 2009	Lol what do you mean? :o
Ganoes Paran Author 26. Jun 2009	yea it's bugged dunno what happened but it totally got screwed up in a way lol, going to refix it whenever i have time
SpiderZ 30. Jun 2009	lolzz what type of crackme register with: Name n Password: ssssssssss
SpiderZ 30. Jun 2009	register with any 10 char length, lolz
KcDaRookie 02. Jul 2009	SpiderZ, thus is only possible due the reason, how the serial has to be.. if u my or kernelj's tut u will see that entering "sss" as name and "ss" as pw will do the trick.. (just figured out, that the program crashes, if pw is only 1 char long... ^^)

Ganoes Paran's Ganoes Crackme - The Key

Download Ganoes_Crackme_-_The_Key.zip, 156 kb (password: crackmes.de)
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Here's Another crackme i made which is harder then the previous one. Here are the rules:

No bruteforcing, no self-keygenning.

More information in the readme

Note: password might be special characters, depending on what you typed in

Note #2: crackme is 500kb about because of dev-cpp compiler, tends to make things quite huge

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 09. Jun, 2009
Downloads: 556

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Solutions

Solution by MCxCodex, published 07. jul, 2009; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

n1lk 08. Jun 2009	It was luck for me... but I'm still trying to get it !
Ganoes Paran Author 09. Jun 2009	^.^ glad you're liking it. reuploading now...
tony 09. Jun 2009	^.^,It's very easy.the algorithm is not complex.
Pride 09. Jun 2009	i dont know how to get the keys for my keygen :S , can sombody teach me pls ??
Ganoes Paran Author 09. Jun 2009	NP Pride, check out your Messages control, sent you a message on how to contact myself easily for further explanation
riton 10. Jul 2009	It's not so hard. Still, it's quite interesting for beginners like me.

Ganoes Paran's Ganoes - First Crackme

Download Ganoes_-_First_Crackme.zip, 184 kb (password: crackmes.de)
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Hiya! Ganoes here. and this is my first crackme.

Rules are simple. username can be anything: numeric, alphabetical, special, doesn't matter

Password is numbers only.

No brute forcing
No Self-Keygenning
No Patching.

Completion Levels:

Gold: Same as Silver but you need to make a keygen

Silver: Same as Bronze but also figure out the algorithm used to make password

Bronze: Get the password for your username

Shouldn't be too hard, hope you enjoy!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 05. Jun, 2009
Downloads: 527

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Solutions

Solution by fireblast, published 12. jun, 2009; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

freesoul 05. Jun 2009	solved but a little bug found, when you add the sums you do one addition out of memory I think you do something like for(i=0;i<strlen(name);i++) hashes[i+1] += hashes[i]; you have to do something like for(i=0;i<(strlen(name)-1);i++) hashes[i+1] += hashes[i];
Ganoes Paran Author 05. Jun 2009	yea, was a tad buggy i think, i dunno, was my first crackme afterall :P this was, more or less,a little test run to see if i can make a stable crackme. over the past few days i made another one, significantly harder then this. you ight be interested in trying it out =)
fireblast 08. Jun 2009	Good little crackme :) . freesoul, from the assembly, it looks more like : for (i = 1; i < strlen(name); i++) serial[i] += serial[i-1]; Anyway, you ought to put some more bound checking. Anyway, theere seem to be a buffer overflow which only affects the password (if you input a huge username, you overwrite the password memory and bypass the password entry). I might be wrong but it is how I see it ;) .
Ganoes Paran Author 08. Jun 2009	Yes this is true. I only used a standard array to hold 256 members, you break and it'll go past. but then again, i wasn't expecting someone to have a name that big :P

Ganoes Paran's Ganoes Paran's Crackme/KeyGenMe 1

Download Ganoes_Paran_s_KeyGenMe_1.zip, 1087 kb (password: crackmes.de)
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It's been a long time since I wrote a crackme, and I hope this won't be a bad one to start off with :D

There's basically two conditions to solve this.

1.) Find a correct password to your Username (shouldn't be too difficult)
2.) Make/Figure out the KeyGen algo for this (Hence why i'm placing this as a difficulty level 3).

The three other dll's in the directory are for the program to run, as it relies on the Qt framework. They have nothing to do with the KeyGen algorithm at all.

Enjoy :D

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 03. Jan, 2013
Downloads: 343

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Discussion and comments

mausy131 10. Jan 2013	You are using strcmp so serialfishing with Olly was easy. 00000-00000 always works for any name. Now when I run it outside olly the serial doesn't work anymore, is this a bug or did you do this on purpose?
Ganoes Paran Author 11. Jan 2013	possibly a bug. There should only be one serial per user though :S So if possible, try to find the actual serial ^^. I wrote this up in about an hour, but the algo should be pretty sound. the chances of "00000-00000" being a correct serial for a specified user should be extraordinarily small.
givses 14. Jan 2013	User: giv Pass: 10760-65005
rk_sys 31. Jan 2013	username: sanayaima password: O2818-856N1
rk_sys 31. Jan 2013	ooops, my mistake rk 87766-54433
JMBrito 01. Aug 2014	00401CBB NOPs
JMBrito 01. Aug 2014	AceStryker 83107-0YB98

Ganoes Paran's PatchMe2 - Revamped

Download PatchMe2_-_Revamped.zip, 10 kb (password: crackmes.de)
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This is my second Patchme and it's been revamped with little tricks and stuff and i deemed it worthy for crackmes.de submition.

I always like to patch things, i mean, who doesn't? it's fun lol. but almost all the PatchMe's out there, they are realyl easy, just like nop the message box or change the last condition jmp to jmp always or nop. so i decided to do this, to make a little bit of a challenege...

please READ the readme.nfo i added there. best viewed with an nfo reader btw =)

the .nfo has all the extra information on how to submit the patchme as well as "completion levels"

Gold place goes to the fewest amount of bytes, silver to the next lowest, then bronze, etc. read the .nfo, it has everything there.

I hope you have as much fun as i had making it!

gl guys =)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 13. Jun, 2009
Downloads: 782

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by DisasmDisease, published 15. jun, 2009; download (6 kb), password: crackmes.de or browse.

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Solution by yudi, published 15. jun, 2009; download (265 kb), password: crackmes.de or browse.

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Solution by c0nfig, published 15. jun, 2009; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

c0nfig 13. Jun 2009	Done. Just NOPed 5 CALLs 20 bytes changed. Uploading patched file as solution...
c0nfig 13. Jun 2009	Uploaded with small tutor :)
DigitalAcid 13. Jun 2009	I like Patchme's too :P.
DigitalAcid 13. Jun 2009	Hmm, it's a dos crackme =(.
c0nfig 13. Jun 2009	DigitalAcid, it is not dos crackme :) Console application less size then GUI app. :D
cyclops Moderator 13. Jun 2009	Actually it was 2bytes. I counted the wrong red ones in olly :P
Ganoes Paran Author 13. Jun 2009	oh god, i think i'll have to make another patchme here now lol
obnoxious 13. Jun 2009	just 2 bytes??? a short jmp? i got a 5 byte call :'(
Ganoes Paran Author 13. Jun 2009	READ THIS!!: two additional rules are added: 1.) After you patch it and when you run it, the CMD window musct not be shown! 2.) Program must exit normall and not CRASH on exit lol.
DigitalAcid 13. Jun 2009	Can't open it with olly, doesn't seem to be a 32-bit program... Can't even run it without debugger. Maybe it's because of Norton, aarg i hate norton :\|.
obnoxious 13. Jun 2009	Make that a 5 byte jump :) and not a call :P
Ganoes Paran Author 14. Jun 2009	lol, this patchme has quite a popularity. glad you all like it and are participating =))) well i'ma spend some time later and make a patchme that is tougher then this, but well, i'm trying my best =))
DisasmDisease 14. Jun 2009	hmm if i look at my patched file and at the original one i can see: Patched: 12,0 KB (12.288 Bytes) Original: 12,0 KB (12.288 Bytes) if it is as you wanted, than yuhuuuu! :) :) :)
c0nfig 14. Jun 2009	DisasmDisease you lol :DD
Ganoes Paran Author 14. Jun 2009	lol, no that's not what i meant DisasmDisease lol you probably changed some Bytes in the program, but you didn't add / remove bytes, so the total amount of bytes in the program after patching looks the same via proteperties. but how many bytes you changed in the patchme is what i'm asking =) obnoxiuos did a 5 byte patch/change on a jump, so he changed 5 bytes, but the patched program size is 12.288 bytes. =)
DisasmDisease 27. Dec 2009	k xD yes iman00b :D

Garyu73's algo-iseng.exe (crackme)

Download algo-iseng.zip, 10 kb (password: crackmes.de)
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Algo iseng ..
Crack with ollydbg ..

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 04. Mar, 2011
Downloads: 208

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Gauri's [A]bu's back again

Download [A]bu.zip, 7 kb (password: crackmes.de)
Browse contents of [A]bu.zip

It runs well in Windows...

I Tried in "Windows XP" & "Windows VISTA"

I have made my crackme of more small or big but is very hard to solve...

You will get more fun...

This crackme is written in VB script and not packed by any tool...

The password that you see or find may not be the password...

It have only one password which I have kept...

You know NO PATCHING...

Think again...

Have fun...

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 18. Oct, 2006
Downloads: 536

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Solutions

Solution by *Sorcerer*, published 01. jan, 2007; download (85 kb), password: crackmes.de or browse.

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Discussion and comments

konstAnt 19. Oct 2006	This is a headache. Will anybody solve it fast???
jB_ 19. Oct 2006	Not really a headache. Once you have found the first char it is almost finished. konstAnt: look at the differences between all the comparisons. It may help you.
konstAnt 22. Oct 2006	Thanks man..........

Gauri's [A]bu crackme 2

Download Crack_me2.zip, 5 kb (password: crackmes.de)
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This program is made from visual Basic 6.0 (VB6.0) ;

No Any Portection nor packed with any tool ;

You cannot do the following ;

1. No patching in any place ;

The following Things You have to do ;

1. Find The Serial of your name ;
2. After finding write how you did it ;
3. Write a keygen for me ;

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 27. Oct, 2005
Downloads: 1118

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Discussion and comments

TELOPHASE 31. Oct 2005	I am having problem running the crackme! It does not let me enter anything in the textbox, neither can i move the window around, nor can i click the check it button. In short it freezes!
deroko 31. Oct 2005	alt + 0151 on numeric keyboard and it will work =)
TELOPHASE 31. Oct 2005	Form Enabled event.. hehhe :p
tommy 07. Nov 2005	I am just guessing, but is there a secound text box? Olly -> Text strings referenced in Crack_me:.text, item 101 Address=0040238F Disassembly=MOV DWORD PTR SS:[EBP-E0],Crack_me.00401D7C Text string=UNICODE "Type the serial in the second textbox."
ultrasound 07. Dec 2005	I got a valid serial, just not got time to find out why its changing yet.. it seems the second time around the serial is shorter than the first.. First serial is like this: BU0FA-1FA second one is like this: BU00-10 ill probably go back and check out the algos later.. has anyone else had a look at them yet?
costy 16. Feb 2006	deroko 's tips (alt + 0151) on numeric keyboard to enable window doesn't work on my win 98 I tried it on Xp and It works correctly

Gauri's [A]bu Crackme 3

Download Crack_me3.zip, 5 kb (password: crackmes.de)
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Well also figure it out....

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 01. Oct, 2005
Downloads: 939

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by NoRG, published 02. oct, 2005; download (6 kb), password: crackmes.de or browse.

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ultrasound 28. Nov 2005	Hi, ive found the code to unlock and ive found a serial which doesnt show any errors (not wrong and not lazy) but it doesnt show 'correct' either.. Is the crackme complete when you can click 'register' without any 'wrong/lazy' message boxes, or should it say correct?
konstAnt 29. Nov 2005	Perhaps it isn't coz I have solved it..... And I'm forward to write a tut
ultrasound 29. Nov 2005	there is probably a serial which takes u all the way to 'correct' i just got lazy to follow all those tstEq and tstNe at the end of the prog.. When i realised the serial i came to first said no message box then i took it no further.. Ill have a look at your tut and see if I was heading the right way :)
Oorja-HalT 01. Dec 2005	wish the authors would be more specific as to what is expected for a proper result. This crackmes is looking for a serial(?) which would enable the register button and after that as you entere a code its looking for a finite number of chars and would display a wrong message for wwrong code however for a specific string ( which i belileve is the right code) nothing happens. Is this is what expected
Oorja-HalT 01. Dec 2005	oh shist guess i would have read the post Ok that was duplication and my appoligies
l0calh0st 01. Jun 2006	Now the difficulty level looks better :))

Gauri's [A]bu Crackme 8

Download Crack_me_8.zip, 32 kb (password: crackmes.de)
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Time:

5:20 PM 11/24/05

1. To unlock the button and text box you must have to type the correct serial to unlock... :lol:

2. no any patching... :lol:

3. you can't enable the button by patching... :lol:

4. the special thing of this crackme is "You can find it your self because it have many features"... :lol:

5. Find the correct serial... :lol:

6. After that write how you did it... :lol:

7. the crackmes.dll is nessessary for the program... :lol:

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 28. Nov, 2005
Downloads: 852

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by konstAnt, published 07. dec, 2005; download (2 kb), password: crackmes.de or browse.

konstAnt has rated this crackme as awesome.

Solution by ByteCaper, published 02. dec, 2005; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

ByteCaper 28. Nov 2005	Nice one ;-) There was a crackme, recently, that used the same technique so it's easy if you know what to look for....

Gauri's [A]bu Crackme v1

Download Crack_mes.zip, 4 kb (password: crackmes.de)
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Hey boys an easy one find my passw0rd.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 23. Aug, 2005
Downloads: 1043

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by calculici, published 25. aug, 2005; download (46 kb), password: crackmes.de or browse.

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Solution by Scortile, published 25. aug, 2005; download (949 b), password: crackmes.de or browse.

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Solution by shteou, published 25. aug, 2005; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

Gauri's Crack me Now

Download Crack_me_Now.zip, 6 kb (password: crackmes.de)
Browse contents of Crack_me_Now.zip

Tip for u
=====================
Without opening u cannot do anything so take this...

The programme may not run because there is a trick...
=====================
Make a keygen for my programme...
=====================
-Happy Cracking
-Do od Die

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 13. May, 2007
Downloads: 422

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Discussion and comments

redoC 21. Apr 2010	Nice crackme, I post keygen shortly.
gavin_soung Author 22. Apr 2010	redoC, welcome your replay!!!!
DDragon.Jimmy 24. Apr 2010	"Only need a little time" it's a joke, isn't? ufff.. I will not write a keygen, maybe next week, when my brain recovers. I enjoy, thank's gavin soung.
gavin_soung Author 25. Apr 2010	Aha, if only a right key and serial, that's easy! If a keygen, maybe need some time. But algorithm is clear.
DDragon.Jimmy 29. Apr 2010	That's true, congratulations redoC, and thank's gavin_soung, the next Maze.. I'll try again ... :)

gbe32241's SDDecoder

Download sddecoder_v1.1.zip, 327 kb (password: crackmes.de)
Browse contents of sddecoder_v1.1.zip

This is an updated version of my original SDDecoder challenge which will hopefully clarify some misunderstandings.

Nothing has changed from the previous challenge under a mathematical point of view.

I just added a few tasks for you and a couple of functions to the code in order to perform some extra checks.

====================================
Very simple to understand, but hopefully very hard to carry out ! Here's a decoder to check for valid codes related to product activation.

Task #1: Describe the math behind functions f_evaluate and verify_parity and what is the lsvec used for.

Task #2: find a valid serial other than these I provide (added 4 new)

ID License string
-------------------------------------
0: J2PCD-7N9CY-UT3KY-6YCYO-YDN93
1: 74G7C-TIKSB-UO3L9-HUOFB-R44X7
2: Q3HU7-HBJTG-2QCXZ-JYRNM-RDNMG
3: MRNUF-933SM-VMNWD-JM7SA-B2UDJ
4: Q6EVW-K3GV7-IZZC3-G4974-DKB2B
5: RISUU-S6EY7-TPVTE-GXGOI-6YH7Q
6: R4VUK-LOAQB-RE93N-VTCVL-XGW6P
7: SPYZA-VIPVX-3T3GF-F32TM-IQJY7
8: SEJUK-Z7SBS-GBDUS-MHEZS-Y7DLC
9: NVLS2-AU6A6-ZDGP6-FEBBO-J2CNQ

Task #3: Create a keygen.

Task #4: Describe the core problem you have faced in solving this challenge (or you are facing and prevents you from solving).

A tutorial on how you did is well appreciated.

see readme.txt for further notes

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: C/C++

Published: 01. Jul, 2008
Downloads: 768

Rating

Votes: 7
Crackme is nothing special.

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Solutions

Solution by andrewl.us, published 13. jan, 2010; download (638 kb), password: crackmes.de or browse.

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Discussion and comments

zart 26. Jun 2008	Why do I just get the feeling that this wasn't coded by you?
gbe32241 Author 26. Jun 2008	Just ask me some questions and see if my replies satisfy you.
zart 26. Jun 2008	i've submitted a solution, personally i still don't think you wrote this, the level is far too high for the requirements you've set... just providing another serial is tedious. providing a (bruteforce) keygen would also be tedious since it only requires you to call the functions you have already provided for us.
MR.HAANDI 26. Jun 2008	I'm on my way making a clean keygen for this one and I first had the same impression (some ripped routines) but one single sentence in a PM from the author destroyed that illusion ;) One more thing: this kind of keygenme is exactly what I love to solve!
andrewl.us Moderator 26. Jun 2008	I'm looking forward to a non-bruteforce solution, don't leave out any details, MR.HAANDI! :)
gbe32241 Author 27. Jun 2008	If you were to produce some collisions pursuing the non-linearity of the f_evaluate function, please consider that it would be easy to counter by just black-listing my own codes after that function.
andrewl.us Moderator 01. Jul 2008	Nice solution, Zart. I like your observation of the look-alike characters maybe indicating that this wasn't a typical crackme. I would still like to see a key generator that faces the math directly. Can we all gather in a circle and chant "MR.HAANDI" to summon him for a solution?
gbe32241 Author 01. Jul 2008	Zart's solution in a real world scenario simply doesn't work, because if I were to black-list codes I would do by comparing the list against the code signatures (the output of the f_evaluate function) and not the input strings. He also probably does not realize that just because portions of my code actually do come from real world protections, doesn't mean that I'm not the author. Still I have to blame myself for my poorly written requests.
MR.HAANDI 01. Jul 2008	Why did a mod permit this solution? If zart wants a level 1 keygenme, then he should specify his serach. This is one of the best math keygenmes I had in a year (still on it) and of course, the task looks kind of weird (well, first submission). However, the submitted solution is like a joke which belongs into comments.
gbe32241 Author 01. Jul 2008	No problem, I'm now updating the challenge leaving the math problem intact and getting rid of these shortcuts at the same time.
saitob 01. Jul 2008	I agree with MR.HAANDI. I know it says only to find one valid serial, beside the ones included. But, if you look at the logic of the program, it's really not a diffirent serial. I mean, the modified serials in the solution is equal to the included ones for the program. I think a valid solution with 1 valid serial would be a completely different serial, maybe if you bruteforce your way to one?... Anyway, i'll be waiting for MR.HAANDI's solution. As always, sorry for bad English, hope i'm understood.
TiGa 01. Jul 2008	Crackme updated after the first solution has been approved.
saitob 01. Jul 2008	Very nice with the update. Just a question: If the source code was not included, what difficulty would this crackme be then?
gbe32241 Author 02. Jul 2008	Not much higher. It may take sometime to reverse, but unless I use a VM to perform the operations, in less than about 4-5 hours a good reverser would quickly rebuild the higher level structures and roughly reach the point where you're all starting with the source code.
zart 02. Jul 2008	I was not intending to be insulting in anyway. I merely was following the directions of the crackme as it had been stated. I'm sorry if I wrongfully thought the crackme was not written by the author who had posted it, I explained why I thought so also. I also stated WHY I felt it was improperly labeled and why a brute-forcer would also be easy enough to do. Don't hate me for following rules that have been set. The updated crackme changes exactly what I was griping about. Again - No offense was ment.
cyclops Moderator 15. Jan 2010	Exceptional solution Andrew!!! Hats off!
gbe32241 Author 16. Jan 2010	Just in case somebody wishes details on DRegZ or on how SDDecoder was built: http://www.webalice.it/giuliano.bertoletti/lca.html
simonzack Moderator 16. Jan 2010	really impressive maths there andrew
andrewl.us Moderator 16. Jan 2010	thanks dudes, the LaTeX stuff makes it look fancier than it really is...too bad it's so much work...TXT next time :)

ged's Special Delivery

Download sd_.zip, 14 kb (password: crackmes.de)
Browse contents of sd_.zip

pretty strange crackme... :-)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 04. Sep, 2002
Downloads: 2640

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Solutions

Solution by bLaCk-eye, published 22. jul, 2004; download (68 kb), password: crackmes.de or browse.

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Solution by Amenesia, published 09. oct, 2003; download (37 kb), password: crackmes.de or browse.

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Discussion and comments

ged/tkm's TKM Trial Crackme v2

Download tkm_trial.zip, 24 kb (password: crackmes.de)
Browse contents of tkm_trial.zip

Trial crackme from TKM! :-)

Difficulty: 7 - Very hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Nov, 2003
Downloads: 2098

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Solutions

Solution by bLaCk-eye, published 27. feb, 2004; download (68 kb), password: crackmes.de or browse.

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Discussion and comments

geeko's Average baby

Download baby3.zip, 203 kb (password: crackmes.de)
Browse contents of baby3.zip

This proggy is the brother of 'Lil baby'

It is derived from other of my crackmes.
U have to patch it! to do what it says and display the 'saved' message.
Can u?

g'luck

geeko

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 12. Sep, 2006
Downloads: 609

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Solutions

Solution by costy, published 07. jul, 2008; download (462 kb), password: crackmes.de or browse.

costy has rated this crackme as awesome.

Discussion and comments

ricnar456 20. Sep 2006	a question?, only is needed show the saved message or the crackme need save anything? the crackme is in the weekly contest of crackslatinos and the members ask me, and i ask to you. Ricardo Narvaja
geeko Author 21. Sep 2006	U have to enable the button (some more challange is to enable the button without patching !!!) show the saved message and of course it saves a file containing the text in that box BTW: contest? what contest?!?
ricnar456 21. Sep 2006	in crackslatinos we make a weekly contest only for practice, your crackme is in this weekly contest, and if any member solve, make a tut. There are spanish tuts, not accepted here, this was contest number 102, pne per week, 4 crackmes per week, hehe, a lot of practice. Ricardo
geeko Author 21. Sep 2006	I can't access it coz I don't know spanish. Are there other of my crackmes there. How do I know if someone cracks them? How do I know how they work on them? Does my cracke is rated somehow? i'D LIKE TO KNOW IF IT IS STRONG OR WEAK, bad or good
ricnar456 21. Sep 2006	well, who are we for tell if are good or not, can be hard for us but easy for others, all is relative. We have a lot of starters and old members, than practice with the crackmes, i canÂ´t talk for them, i donÂ´t view the crackme, only the members tell me, they enable the button but donÂ´t see save nothing, but this in the first view, maybe, the save is a little hide, i suppose. Ricardo
geeko Author 21. Sep 2006	Well, I think this is tougher then I expected. hint: there are 16 bytes to patch (more places, not just the button). want more hints?
geeko Author 21. Sep 2006	remember: button enabled click button save file show msg remember?
ricnar456 22. Sep 2006	perfect thanks Ricardo
geeko Author 25. Sep 2006	I thought last night and I think this is level 10/10 coz I myself can't patch it without the original EXE or the source files. Want some more hints?
geeko Author 12. Oct 2006	patch at 434d9c,454627,454664,4547a0

geeko's Ballie

Download input.zip, 190 kb (password: crackmes.de)
Browse contents of input.zip

U have to find out the way to make the circle move around.
There is no packer, nor antidebugging. (as usual from Geeko)
No patches!
Delphi only

g'luck

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 06. Sep, 2006
Downloads: 468

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

BaKaE 18. Sep 2006	too hard for me, sorry. Pleaze give some hints
geeko Author 19. Sep 2006	circle is moving but with a step of 0
BaKaE 19. Sep 2006	nice thnx for that info
BaKaE 19. Sep 2006	i got a little question ?? i does the mousemove function want ?? i analize the move "into" the crackme-window with the mouse, why?? it is needfull??
geeko Author 19. Sep 2006	The move is essential and needed. Go on...
geeko Author 25. Sep 2006	Did u find what the move wants? gave up?
BaKaE 25. Sep 2006	sorry, not really time for this, next weekend next try
BoR0 25. Sep 2006	I dont understand what you mean by "make the ball move". But here's a little hack that will make the ball animate: At address 0x44E2AC patch the code to PUSH ECX (0x51) Did you want the ball rotating or something else?
geeko Author 25. Sep 2006	No no. Just bouncing to the 4 walls. But remember: no patches!
HMX0101 25. Sep 2006	geeko, you have a TTimer in the form to control the ball movement?
badmojo 25. Sep 2006	Not a problem! Fun crackme, although I cant imagine how this could be used in the "real world". ;) But its a nice reversing exercise, of course! Hint: Think in a grid-like way! ;) As usual, will write solution if/when possible...
geeko Author 26. Sep 2006	HMX, yes Badmojo, Why cant be used in real world? Did u solve it? write tut
geeko Author 12. Oct 2006	u have to press a key, move the mouse the right way, then press another key.
geeko Author 28. Nov 2006	there are not enough hints to this?

geeko's Distil

Download distil.zip, 218 kb (password: crackmes.de)
Browse contents of distil.zip

This proggy has a simple goal:

To find the right switch combination to turn the circle red.
And then to find another combination to turn it back to gray.

Don't patch for a couple of weeks.

g'luck
have fun
bye bye
ciao
see ya

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 26. Sep, 2006
Downloads: 525

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Solutions

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Discussion and comments

badmojo 26. Sep 2006	Seems to have a small bug, when you click a switch it cannot find file "on.bmp". If this is intentional let me know...
geeko Author 26. Sep 2006	oops, sorry i forgot something, I will upload again, thanx SORRY
zairon Moderator 26. Sep 2006	No, my fault. I thought the solver should add the bitmap...
sd333221 26. Sep 2006	Is brute-forcing allowed? I think i will try brute force it... 2^12 combinations is only about 4000 .... I will put in a colour check and let it run ;) Just want to know if it's allowed
BoR0 26. Sep 2006	Normally, we can see that the author is drawing an Ellipse. Therefore set a breakpoint on GDI32.Ellipse, once we land there, press ALT+F9 (olly) to go to user-code, and before the Ellipse call we see a call that sets the color, here is where you should analyze. ...code... 0041F71F \|. E8 6C050000 CALL distil.0041FC90 ...code... call elipse ...code...
geeko Author 27. Sep 2006	@sd I think you cant brute force, but give it a try, i'm curious. Brute force is not a solution. @Boro LOL. I'll give u a hint: I dont use 'ellipse', but it is a Tshape. 'Ellipse' is called only by the system on 'repaint' event.
BaKaE 27. Sep 2006	@ geeko did you reuploaded this crackme??
geeko Author 27. Sep 2006	Bakae yes, now it contains the bitmaps.
BoR0 27. Sep 2006	geeko, and what do you think TShape is? Delphi is just another API-wrapper programming language.
geeko Author 28. Sep 2006	@Boro, I meant Delphi calls 'ellipse' NOT the author. Thanx for your recommendations, but I think it's useless. @sd, after each combination u have to wait a little amount of time to see what happens. go on
sd333221 28. Sep 2006	I bruteforced it! I got the combinations :-) But i am not allowed to post an video on how to bruteforce it! -.- I will see if i can solve it on my own :D
geeko Author 29. Sep 2006	If your brute force is accepted by the moderators as solution, I promise I'll make another version with much more switches!
sd333221 29. Sep 2006	It's not a solution ;-) I just did this for learning
zairon Moderator 29. Sep 2006	@sd333221, you can post a video (I did the same thing with my last solution) but you have to explain what you did. Few phrases are not a solution. Do you really think a newbies learn something from the video? Sorry but I don't think... @geeko, we can accept a bruteforcer because when you release the crackme you only specify "no patch". We can't always ask the author for what we can/can't accept... If you have something else to ask me, feel free to contact me via pm. Please, leave this area for the crackme only.
geeko Author 12. Oct 2006	the checking routine runs under am emulated processor. U have to reverse another kind of ASM
stars2000 28. Dec 2006	Nice one geeko. different from others. I would like to see how you bruteforce very much, if you care to send a real video sd.
geeko Author 29. Dec 2006	star, ask sd333221
BaKaE 29. Dec 2006	i believe hes is banned, coz hes never online :(
zairon Moderator 29. Dec 2006	He's not banned...

geeko's Donald Duck

Download test.zip, 208 kb (password: crackmes.de)
Browse contents of test.zip

Long time no see. Time trials.

In this crackme you have to enable full fuctionality for another 30 days after expiration (from first run), or (harder): full functionality till 2099 WITHOUT patching the proggy or turning back the system clock.

g'luck!

questions?

Geeko

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 07. Oct, 2006
Downloads: 696

Rating

Votes: 5
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

geeko Author 12. Oct 2006	time trials are to hard for you?
BaKaE 12. Oct 2006	its funny you said click the cicle to get more time, but nothung happens ??
geeko Author 12. Oct 2006	Click the circle to score!! U cannot score?!?!?
BaKaE 12. Oct 2006	at first : the score is sometimes really small ( hard to click ^^ ) nothing happens at the counter (only time decrements)
BaKaE 12. Oct 2006	"at first : the score is sometimes really small ( hard to click ^^ )" sorry ^^ i mean the circle is sometimes really small
geeko Author 13. Oct 2006	can u score when the circle is big? did u try something for the crack? like turning back the date? if so, u wont be able to score any more. Remember: is a time trial.
BaKaE 13. Oct 2006	now only unzip and then open the prog and try to click the circle but i changed my time and date to crack another crackme, maybe this was the problem
geeko Author 16. Oct 2006	oops, if u changed the time after the first run of 'Donald duck', u are out of the trial period and cannot score anymore. want some hints? If u give up with this crackme, just let me know, and I'll tell u how to delete the traces of the proggy out of your computer.
BaKaE 16. Oct 2006	no i didn't gave up >> no time to crack this sorry !!

geeko's El cripto

Download crackme2.zip, 199 kb (password: crackmes.de)
Browse contents of crackme2.zip

Enter the response key to see the 'good guy' message.
create a key gen
write a tutorial

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 28. Aug, 2006
Downloads: 1021

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Solutions

Solution by HMX0101, published 04. oct, 2006; download (22 kb), password: crackmes.de or browse.

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Discussion and comments

l0calh0st 29. Aug 2006	Should have used text box instead of label to make it user friendly for using keygen:)
AlexeyG 29. Aug 2006	anyone who managed to get to the place where we read the text from the textbox, could you give me a tip on this here or in PM?
l0calh0st 29. Aug 2006	Ok i created a keygen http://l0calh0st.byethost16.com/files/crackmes/keygen_geeko_kgme.rar
AlexeyG 29. Aug 2006	Here is my keygen + Delphi source: http://alexeyg.denduvel.nl/solutions/solution_geeko_el_cripto.zip
geeko Author 30. Aug 2006	good job. thanks guys. but what about a tut? Alexey, edx:=edx and $FF; does change something! coz EDX is a 32 bits register (not 8), remember?
AlexeyG 30. Aug 2006	But from edx and ecx we only use dl and dl, as I belive(may be wrong). This is why I left this comment.
HMX0101 30. Aug 2006	My keygen source (delphi): program Project2; {$APPTYPE CONSOLE} uses SysUtils; var s: string; i, i1, a, b, c: integer; begin Write('Enter crypted string: '); readln(s); if length(s) >= 1 then begin i1:= 2; for i:= 1 to length(s)-1 do begin if not odd(i1) then begin c:= ord(s[i1-1]) and $F0; a:= (ord(s[i1-1]) and $F) + (ord(s[i1]) and $F0); s[i1-1]:= chr(ord(a)); b:= (ord(s[i1]) and $F) + c; s[i1]:= chr(ord(byte((b)))); end else begin c:= ord(s[i1-1]) and $F; a:= (ord(s[i1-1]) and $F0) + (ord(s[i1]) and $F); s[i1-1]:= chr(ord(a)); b:= (ord(s[i1]) and $F0) + c; s[i1]:= chr(ord(byte(b))); end; inc(i1); end; Writeln('Serial : ', s); Writeln(#10#13, 'Enjoy it!'); end; Readln; end. Great crackme, geeko :)
geeko Author 31. Aug 2006	who dares to write the tut on how did u find it?
geeko Author 07. Sep 2006	Hey! Who is not so lazy, to write tuto?

geeko's Epipulus

Download epipulus.zip, 211 kb (password: crackmes.de)
Browse contents of epipulus.zip

Find the correct combination to see the good boy message.
Make a geygen.
You may bruteforce.
Don't patch

g'luck

Geeko

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 17. Oct, 2006
Downloads: 647

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Solutions

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Discussion and comments

geeko Author 25. Oct 2006	I think my crackmes are too hard
geeko Author 27. Dec 2006	still working on it, or I can remove it?
Shism 27. Dec 2006	Look...if this a brutefoce crackme... then it either is impossible with current technology or will take a while to brutefoce.... so don't remove it, just leave it here
geeko Author 29. Dec 2006	it is not a bruteforce crackme

geeko's evolution1

Download evol.zip, 201 kb (password: crackmes.de)
Browse contents of evol.zip

This is the first one from a series dedicated for those begginer programers who start to write their first protection schemes. I'd try to make Evolution series harder and harder to crack from version to version. Is some king of my evolution in protection shemes.
So I will start with a very dumb protection scheme, as at that time I knew nothing about cracking. I think today there are very many new programmers who use this stupid technique. But is good to have a starting point to begin with.
So don't blame me. Think of your first line of code when you first tryied to put a pass in yoour app.
I want very newbies to have something to start off.

In this crackme you have to do anything you want to play the little game.
There is nothing special. Remember, is it just for learning basics cracking and newer version will have better and better protection, based on your solutions.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 19. Mar, 2009
Downloads: 838

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by boon, published 23. mar, 2009; download (421 kb), password: crackmes.de or browse.

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Solution by reenox, published 23. mar, 2009; download (453 b), password: crackmes.de or browse.

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Solution by T.0.R.N.A.D.0., published 23. mar, 2009; download (1 kb), password: crackmes.de or browse.

T.0.R.N.A.D.0. has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

windowbase 20. Mar 2009	I could find the password in the way of stepping through the whole ASM codes. The comment section of ollybdg showed me the password. But I'm not sure why I had step into some calls. I'm sure that I'm just a newbie. ^^
geeko Author 20. Mar 2009	If you are sure you can always play the game then you can write a tutorial on how did you find the password.
indomit 20. Mar 2009	DeDe shows password just as it is in FormCreate method :)
T.0.R.N.A.D.0. 20. Mar 2009	In Olly, you can just check 'All referenced strings' ;)
geeko Author 20. Mar 2009	ok, write tuto, so we can proceed to the next generation: evolution2
windowbase 20. Mar 2009	I could find the password also with ollydbg's referenced strings search.^^
T.0.R.N.A.D.0. 20. Mar 2009	@ Author Submitted the tutorial.
reenox 20. Mar 2009	well this was a work of 30 min. I hope this series will get harder with evolution2 ;)
reenox 20. Mar 2009	i mean seconds *
zero5 25. Mar 2009	197 is my personal highscore ^^ what's urs?
Peregrinus 10. Apr 2009	thanks, im also new to this.. i would imagine I would not see this happen often in the wild.. if so thats pretty bad
paththeir 27. Jun 2013	Thank you! It was a good chance to test DeDe, to get known with it. Of course, you could use anything what can read memory

geeko's Evolution 2

Download evol2.zip, 201 kb (password: crackmes.de)
Browse contents of evol2.zip

what we have learned from Evolution 1:

As we saw in 'Evolution1' crackme's solutions, storing the password hardencoded in exe, especialy near the pass checking routine, is very bad, as a guy said: 'just 30 seconds crack'.
So let's work just a little bit on this bad practice: evolution 2;

In this crackme you have to do anything you want to play the little game.

thanx to boon,reenox,tornado and all

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 28. Mar, 2009
Downloads: 935

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Solutions

Solution by T.0.R.N.A.D.0., published 30. mar, 2009; download (2 kb), password: crackmes.de or browse.

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Solution by obnoxious, published 30. mar, 2009; download (607 kb), password: crackmes.de or browse.

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Discussion and comments

obnoxious 29. Mar 2009	nice trick eh eh eh :)
boon 29. Mar 2009	T.0.R.N.A.D.0 you kind of spoiled it for the people who haven't done it yet. Solution coming up soon , it's going to be quite a lot like the first one tho.
Zaphod 29. Mar 2009	Yeah, too often we see solutions revealed here in the discussion forums :(
T.0.R.N.A.D.0. 30. Mar 2009	Sorry, author can just delete the comment. This won't happen again.
geeko Author 30. Mar 2009	I removed that comment
geeko Author 30. Mar 2009	every evolution should be about the same with the previous one, with a little modifications, just for the new crackers to keep track on how the protection is modified to compensate the for the solution you give.
Qrchack 02. Aug 2014	My solution is to replace JE (jump if equal) with JMP (jump anyway)

geeko's evolution 3

Download evol3.zip, 201 kb (password: crackmes.de)
Browse contents of evol3.zip

what we have learned from Evolution 2:

Keeping hard encoded password (clear text) in the exe is again a bad idea, even it has a tricky name, or is put far from checking routine.
So let's work just a little bit on this bad practice: evolution 3;

In this crackme you have to do anything you want to play the little game.

thanx to obnoxious,tornado and all

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 04. Apr, 2009
Downloads: 477

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by T.0.R.N.A.D.0., published 18. apr, 2009; download (202 kb), password: crackmes.de or browse.

T.0.R.N.A.D.0. has rated this crackme as boring crap.

Solution by indomit, published 10. apr, 2009; download (403 kb), password: crackmes.de or browse.

indomit has rated this crackme as boring.

Discussion and comments

geeko Author 08. Apr 2009	evolution cannot evolve if there are no solution to grow from.
T.0.R.N.A.D.0. 08. Apr 2009	LOL ! :D I'll try it after 12th (I've 2 appear 4 IIT-JEE) Best o' luck.
T.0.R.N.A.D.0. 08. Apr 2009	"In this crackme you have to do anything you want to play the little game." So, can we patch ??
geeko Author 08. Apr 2009	:) ANYTHING. coz when you want to use a software without paying for it, you won't ask the author if you can patch. LOL It would be nice to explain in tuto, why you came to the solution of patching, and not the more elegant pass finding. ok
geeko Author 10. Apr 2009	evolution stoped at age of 3?
indomit 10. Apr 2009	No, of course :) As it still uses easy algorithms to check password, and as we can patch it, it is still very easy :) P.S. I uploaded my solution.
T.0.R.N.A.D.0. 17. Apr 2009	So, it's already solved ! Anyway, my solution (uploaded) is different and VERY VERY short !

geeko's Evolution 4

Download evol4.zip, 202 kb (password: crackmes.de)
Browse contents of evol4.zip

what we have learned from Evolution 3:

USing the main form's initialization events only for password checking can be easily be cracked by skipping them.
Here comes Evolution 4

In this crackme you have to do anything you want to play the little game.

thanx to indomit and all

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 16. Apr, 2009
Downloads: 384

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Solutions

Solution by T.0.R.N.A.D.0., published 21. apr, 2009; download (205 kb), password: crackmes.de or browse.

T.0.R.N.A.D.0. has rated this crackme as nothing special.

Discussion and comments

T.0.R.N.A.D.0. 17. Apr 2009	Hi geeko, I've submitted the solution.
geeko Author 21. Apr 2009	I wait happy easter how did you find it?
T.0.R.N.A.D.0. 21. Apr 2009	@ geeko Well, it was still VERY easy. :) Al long as patching is allowed, we rarely need to use our brain. ;) I wonder when will the mods approve my solution. It's been 4 days ! 3/4 solutions in queue are mine :)
geeko Author 22. Apr 2009	I will try to make it harder remember, it's for newbies to learn step by step solution is aproved
geeko Author 28. Apr 2009	Evolution 5 submitted. espacially for tornado

geeko's Evolution 5

Download evol5.zip, 203 kb (password: crackmes.de)
Browse contents of evol5.zip

what we have learned from Evolution 4:

what was bad:
Using a resource editor (reshacker) we can easily bypass/delete main initialization procedures. Also we can change many properties of the objects inside de app. Using Dede we can analyze the procedurees and see where the application terminates and other delphi functions in clear text.
What was good:
Some patches influenced the normal flow of the program, so Tornado had to patch in many places.
So, lets work arround these facts: Evolution 5.

In this crackme you have to do anything you want to play the little game.

thanx to tornado and all

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 29. Apr, 2009
Downloads: 525

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by skalk, published 11. may, 2009; download (216 kb), password: crackmes.de or browse.

skalk has rated this crackme as nothing special.

Discussion and comments

T.0.R.N.A.D.0. 29. Apr 2009	Hitting cancel causes "Access Violation @ 00000000" !!
geeko Author 30. Apr 2009	Is a little bug, I know, but I left it as is as part of protection. I was just lazy and used standard Delphi input box
geeko Author 05. May 2009	is someone working on it. or evolution has reached full maturity?
skalk 06. May 2009	we are working ... i think this should be evol6 :) now u did some traps ...
skalk 06. May 2009	ok . i finally did it by finding part of key and some patch. game is running ...
geeko Author 07. May 2009	if you didnt bruteforce it, and the game is running normaly, write detailed tut, so we can evolve. why should be evol6?
geeko Author 07. May 2009	it would be nice if you write which were the best parts of protection
skalk 07. May 2009	ok. solution posted. best protection ? hmm maybe those floating-point calculations - they made a exceptions for bad password and we dont know if they are needed or not
geeko Author 08. May 2009	yes, they are needed who said is the best protection?
Zaphod 13. May 2009	geeko, I can make the game run with a 2-byte patch and an almost correct password, but that isn't quite good enough. I assume there IS a password that will make the game run without any patches. Am I right about that?
geeko Author 19. May 2009	Go , write tutorial. many tuts are always welcome, so to make a better protection stuidying them. Yes, there are many possible passwords. find one of them and youu will not need to patch. it would be the best crack.

geeko's Lil' Baby

Download baby.zip, 190 kb (password: crackmes.de)
Browse contents of baby.zip

patch me.
This little baby sounds simple, but I think is hard to patch.
It is derived from other of my crackmes.
Find a way to patch it! to do what it says.
Can u?
The proggy is in Delphi only and uses less than 10 instructions.

g'luck

geeko

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 08. Sep, 2006
Downloads: 684

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Solutions

Solution by zhengjuyu, published 17. sep, 2006; download (193 kb), password: crackmes.de or browse.

zhengjuyu has rated this crackme as quite nice.

Solution by EvOlUtIoN, published 11. sep, 2006; download (192 kb), password: crackmes.de or browse.

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Discussion and comments

BaKaE 08. Sep 2006	kick ass! you upload a crackme every day, huh!!
EvOlUtIoN 08. Sep 2006	I solved it! i think it was easier than others! Now i'm writing a solution
SasaMaker 08. Sep 2006	Yea, i havn't cracked in a while, i will try, and defet this with the power of elton john!
BaKaE 09. Sep 2006	i understand this crackme now, but im too busy to solve it complet, sorry the fact is this button is not really a button (only a painted button (line on line with the right color)) this is the reason why the button cant be see on a ressource-editor ;-) --> nice work
EvOlUtIoN 10. Sep 2006	yes, this is not a real button, but as you can see soon in my solution this is not important, because there is an event that can solve our problems ;-)
geeko Author 11. Sep 2006	bakae, sometimes more carckmes per day. Good evolution, but don't forget that u have to make the button active and act like a button (look and feel) and close the app. please write a tuto
BaKaE 12. Sep 2006	nice work evo (easy to understand your sol) thnx
geeko Author 12. Sep 2006	Very good evo, but I am a little bit dissapointed coz I didn't make myself clear enough. The button doesn't look like a button. As u know, the button click is taken when u release the mouse button. So I expected to see the button active, image button down, then up(exit prog). U patched the exit procedure, not the button. Anyway, very nice, Evo, Thanks
geeko Author 12. Sep 2006	I expected to make the button active, then make it terminate prog
zhengjuyu 16. Sep 2006	I have patched the proggy in two place. One is in FormPaint procedure, change the base address of the color array. Another is in FormMouseUp, use "Call ExitProcess" instead of "Call MessageBeep".
geeko Author 17. Sep 2006	write tut and upload patched proggy
EvOlUtIoN 17. Sep 2006	very goosd solution zhengjuyu a lot better than mine!
geeko Author 18. Sep 2006	Very nice, but here is a little bit of more challange: (coz u didn't see a very little, tiny, very well known instruction) So: Enable the EXIT button without patching!!!!! (patching for terminate is ok) Or u want me to write another crackme for this?
zhengjuyu 18. Sep 2006	i am a beginner, and i don't known what the "well known instruction" is.Enable it without patching? i need some hint.
geeko Author 18. Sep 2006	test eax,eax sounds familiar?
zhengjuyu 18. Sep 2006	oh, i see. thnx.
geeko Author 21. Sep 2006	u may create a helping application

geeko's Nagger

Download nagger.zip, 267 kb (password: crackmes.de)
Browse contents of nagger.zip

This is the brother of Naggy. Nag screens come again.
Do what you want to play the little gamie without the nag screen.
Written in Turbo pascal and Delphi.
No antidebug or alike

g'luck

Geeko

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 06. Dec, 2006
Downloads: 667

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

Zaphod 13. Dec 2006	geeko, I have patched the hidden exe, "G1xn", so that I can play the game without the nag screen, but I don't know how you extract G1xn from the jpg. How about a hint...?
geeko Author 16. Dec 2006	How many kinds of patches did u apply? Does g1xn work as a standalone executable without nag? hint: U can add data at the end of a JPG without affecting the display of the picture.
Zaphod 17. Dec 2006	I patched out one of the "WinExec"s so that WordPad is not started. That was the easy part. Then I redirected the program at one point to my own very small piece of code which made the program ignore the WM_EXIT message that otherwise stops it. But where this exit message comes from I can't figure out...this is why I can't write a tutorial, I simply don't understand the crackme well enough.
Zaphod 17. Dec 2006	Yes, G1xn works as a standalone without the nag...
geeko Author 18. Dec 2006	if u trapped WM_EXIT. can u still exit the app in the normal way? if not, then your solution is not good. U should do more patches
Zaphod 18. Dec 2006	Yes, I can exit the normal way. The code I inserted makes the program ignore the first WM_EXIT, but not the following.
Zaphod 18. Dec 2006	By the way, my best score in the game is 157 :)
DeepBlue 18. Dec 2006	http://img128.imageshack.us/img128/8955/unbenanntbc3.png 219. Hmm. But i guess a screenshot does not proof anything on a reversers playground g
Zaphod 19. Dec 2006	No, it doesn't, but I believe you :)
geeko Author 19. Dec 2006	so write tutorial, send the patched program
Zaphod 20. Dec 2006	geeko, what I can write about this crackme is simply not good enough for a tutorial, but I'll send a private message to show you what I patched. I hope someone writes a proper solution...
LucuBRB 23. Dec 2006	http://i124.photobucket.com/albums/p32/lucubrb/thumb/naggers.png It's fun 4 play. Owh... my mouse... >.<
DeepBlue 24. Dec 2006	Are you serious? :O No cheating?

geeko's Naggy Mastermind

Download naggy.zip, 316 kb (password: crackmes.de)
Browse contents of naggy.zip

Very long time no see
Something special for your birthday.

NAG screens. (whazzup? Name/serials is all you can do?)
Here you have to do anything you like to play the little game without the naggy screen!

g'luck
Geeko

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 21. Oct, 2006
Downloads: 1404

Rating

Votes: 4
Crackme is boring crap.

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Solutions

Solution by sharpe, published 21. jan, 2007; download (351 kb), password: crackmes.de or browse.

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Solution by EsKiMo, published 04. jan, 2007; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

SaXoN 21. Oct 2006	Hmm dunno if im doing something wrong but it seems the program doesnt shut down properly... If you check in the processes you see its running after shutting it down. It also causes an error if you run the original exe again! :\
DeepBlue 22. Oct 2006	Well, i just nopped the Call to the Messagebox and it works now without nag. I dont see the Challenge here?
SaXoN 22. Oct 2006	Hehe ye it should be a level 1 imo :)
geeko Author 23. Oct 2006	@saxon If the pc is too slow, the proggy may not terminate completely. Is tested on 1,5 Ghz Pentium. What process remains in the list? The error is normal. End the process manually and run again. @deepblue, where did you patch?!?! I'm not sure you saved your patch and run again. Did I miss something?
SaXoN 23. Oct 2006	I wouldnt exactly call my Athlon 3200+ "slow". When opening the main executable, it unpacks a second file and opens it, the error consists of the first main-file "hanging" after the second executable is running and even after closing the second executable it still runs. Ths could be caused by my antivirus which gives me a warning concerning a hidden install (the second file) but im not sure and im not at home right now so im not able to test it :)
DeepBlue 23. Oct 2006	Sorry. I accidentally posted some kind of solution. Did u read my post geeko? Otherwise i write you a pm.
Electron_Cloud 24. Oct 2006	Prog keeps crashing on me when I try and fix it. Got rid of the Nag screen though.
geeko Author 24. Oct 2006	@saxon. The main prog is supposed to remain in memory until the second finishes. I'll disclose something: the main prog loops like this: repeat sleep(300); until findwindow(nil,pchar(n))=0; ...... exit; Where n is the caption of the second exe ('Naggy'). I dodn't see any problem here, sorry.. @deepblue. I didn't read your post, write pm. @electron, it crashes if u do a wrong or incomplete patch or if pause the normal running (eg debugging)(coz there are some timings inside). Not intended btw.
geeko Author 24. Oct 2006	OOOps, I missed something. Should I upload again? or I will ask some more conditions: Don not change the name of the files! and you will have more fun cracking this.Or I'll upload again and it will be no more 'quite bad' ok? thnks

geeko's nagoya

Download nago.zip, 3 kb (password: crackmes.de)
Browse contents of nago.zip

Get rid of the nag screen.
Thats all.
It uses a little trap example.

g'luck

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 22. Nov, 2006
Downloads: 1312

Rating

Votes: 5
Crackme is boring.

Rate this crackme:

Solutions

Solution by crack, published 27. nov, 2006; download (4 kb), password: crackmes.de or browse.

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Solution by Sunshine, published 27. nov, 2006; download (30 kb), password: crackmes.de or browse.

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Solution by boonz, published 27. nov, 2006; download (6 kb), password: crackmes.de or browse.

boonz has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

red477 22. Nov 2006	i dont know what do you mean by "It uses a little trap example". I dont see any trap.
modchip 23. Nov 2006	geeko is on fire! He makes crackmes so fast! :)
geeko Author 23. Nov 2006	@red, I meant it is a nice example for very newbies. U may not call it trap anyway...
Zaphod 23. Nov 2006	he, he! There IS a trap after all...
HMX0101 24. Nov 2006	The only trap, i see is the swapped editboxes ;)
Zaphod 24. Nov 2006	hmx0101, you are right, but I was tricked for a while...
geeko Author 24. Nov 2006	Hehehe. go go When you get rid of the nag, write tuto!
Ank83 24. Nov 2006	hm.... Am I missing something or this is not a keygen ? Just one code, no matter what you enter as a name ? Regards Ank83
Ank83 24. Nov 2006	the right solution will probably be the ediboxes to be on the right place after we nop the dialogbox. am I right or ?
geeko Author 24. Nov 2006	The nag is important and the tuto also on how did u find it and how does it pop up. keygen is optional (the little 'trap') I told is for very newbies
cyberkiller 24. Nov 2006	i get rid of that nag, but is it necessary to register that. i changed the code that whatever name and code you enter, it will display the success message..
roxypietro 24. Nov 2006	I have found the solution. There wasn't need to change the code, the solution is very simple. In the code there is a little trap that it confuses all, but it's possible resolve it! I'm Italian and I don't know if my english is good!!
geeko Author 26. Nov 2006	I think Roxy found the trap I mentioned. Write tuto. Your english is good enough.
oxygen240 27. Nov 2006	Good crackme. I'm noob and I've succeeded to crack it (nag & serial). For me, it's a good training, but I don't see any trap... I have just reversed "Name" and "Serial" when I did analysis of the code. Sorry for my english, I'm French :)
geeko Author 27. Nov 2006	oxygen it's nice to write tuto for newbies
geeko Author 28. Nov 2006	only Sunshine's solution approved by me. He found the trap I mentioned. nice
crack 28. Nov 2006	humans will is its heaven
Zaphod 29. Nov 2006	We can rate the crackmes. If we could rate the tutorials, too, then sunshine's tutorial would get a really high rating. It is VERY nice!
Ixje 19. Jan 2007	I liked it. And for Sunshine, awesome tutorial. Clean and well written.

geeko's new age

Download crackme.zip, 245 kb (password: crackmes.de)
Browse contents of crackme.zip

coded in Delphi + ASM. But doesn't matter, the idea works in every language.
I never saw this protection scheme anywhere. did you?
U just have to find the correct number to go on or to skip it.
There is more than one trap.
Proggy may crash if you enter invalid code.
Good cracking luck!
see u soon

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 07. Sep, 2006
Downloads: 821

Rating

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Solutions

Solution by BoR0, published 26. sep, 2006; download (4 kb), password: crackmes.de or browse.

BoR0 has rated this crackme as boring crap.

Discussion and comments

AlexeyG 30. Aug 2006	Well I got some results... not so good results, but still.. Here is a code that'll show the good boy message: 0713247. I think it's one of the possible variants (I didn't look into this). The code seems to work, but I do have a small 'bug' there... if you hit the check more then once then you'll get an error. I think this is another catch. Haven't looked yet, but guess the number should be greater. Please confirm that this is not a bug.
AlexeyG 30. Aug 2006	Ok, some results I can say: this is not the only key, that will start the good boy message procedure. However this is the only numeric key to do this ;) And I want to belive that program crash is not my fault. Oh and I liked one trick in the crackme a lot, good work, geeko.
geeko Author 30. Aug 2006	0713247 is a bad code. did u brute force it or? u can call it a lil' bug (maybe u want me to write an updated crackme, so 0713247 won't work anymore?), but I said that the prog may crash with invalid code! u did it good, alexey, u are pretty close. Find the code & write tut. Thank u
AlexeyG 30. Aug 2006	No, didn't bruteforce. I just found the good boy message and made a code that would make the crackme jump there. Hm, oki I will look into this tom. Thank you for the answer!
geeko Author 31. Aug 2006	ok,i confirm is a little bug with second press, even with the right code (it was intended to be pressed once). It was by mistake that your code works, but is very close to the 'good boy' real routine entry. Any way I accept your solution if u write the tuto on how did u find it
geeko Author 31. Aug 2006	is not a bug, is a catch. there is other numeric key
geeko Author 07. Sep 2006	Hey. Did you give up?
geeko Author 19. Sep 2006	hint try again. The code is an encrypted memory address.
BoR0 21. Sep 2006	I understand the algorithm, but the hard part is to find the code offset where the Goodboy is stored. :)
geeko Author 21. Sep 2006	hint look in 'changemouseup'
BoR0 21. Sep 2006	Here's a code that will generate an EBFE (infinite loop) 2253246 :)
BoR0 21. Sep 2006	Hmm, I thought I found the goodboy offset, but I did not. 00466110 is NOT the offset we need.
geeko Author 22. Sep 2006	Where is that infinite loop? why 466110 is not good?
BoR0 22. Sep 2006	The offset 466110 is a good offset. But your algorithm is such that it has no possibility of spitting a number that will generate a jump to 466110.
BoR0 22. Sep 2006	Is 466110 the offset we were looking for? Did you plan that offset to be the final offset? If so, this crackme has no solution.
geeko Author 25. Sep 2006	Are u sure? Think a bit more. OK. it took too much time! there is a sollution. 466110 is the right address. Tomorrow I'll publish the corect code.
BoR0 25. Sep 2006	I have bruteforced every value from 0 to 4294967295. Your algorithm has no possibility of returning a 0x466110.
geeko Author 25. Sep 2006	Hahaha. You are cool man! Tomorrow u'll see your brute force has an itzy bitzy tiny little bug which avoids the correct number. :) see ya.
HMX0101 25. Sep 2006	This one is very easy... @BoR0: try to reverse 00466110, using the geeko algo :)
BoR0 25. Sep 2006	I apologise. A mistake found in my bruteforcer. Why was my post deleted btw? Admin message me please
BoR0 25. Sep 2006	BTW I have found the correct code :)
geeko Author 26. Sep 2006	Tell the correct code. Bruteforce is not a solution!
BoR0 26. Sep 2006	geeko, I have already posted the correct code but the admins have deleted that message. I will post it to your PM.
BoR0 26. Sep 2006	I have found a way to solve it without bruteforcing too, but I am afraid I already posted my solution yesterday. Why didn't you say that bruteforcing was not allowed in the readme.txt file?
zairon Moderator 26. Sep 2006	From our FAQ: "...don't post comments like "I have solved the crackme" or "Solved! Serial is xxx" or "Solution is posted"..."
BoR0 26. Sep 2006	OK zairon. I havent been around this webpage for a while. ;)
geeko Author 26. Sep 2006	I forgot to say not to bruteforce. sorry

geeko's Picasso

Download ownapi.zip, 207 kb (password: crackmes.de)
Browse contents of ownapi.zip

The proggy explains itself
U have to find out the correct code to activate SAVE button
and let EXIT button to do what it is supposed to do.
There is no antidebugging trick nor packer used
don't patch, find the code.
Written in Delphi September 2006

good luck

Geeko

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 04. Sep, 2006
Downloads: 637

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Solutions

Solution by Zaphod, published 07. nov, 2006; download (100 kb), password: crackmes.de or browse.

Zaphod has rated this crackme as quite nice.

Discussion and comments

geeko Author 04. Sep 2006	tip: window is white
geeko Author 05. Sep 2006	write a tutorial
BaKaE 05. Sep 2006	i got a question 1. did you really use "TButton" if yes: how did you hide the button-ressource my ressource-editor don't show the TButton-ressource only TImage
geeko Author 05. Sep 2006	There is no tbutton resource as known from Delphi
l0calh0st 05. Sep 2006	i think it uses the form.keydown events......Not sure though...found the way to patch but didn't got where it actually reads the entered serial
EvOlUtIoN 05. Sep 2006	very good crackme!
geeko Author 06. Sep 2006	127.0.0.1, u are close, but I didn't use keydown. How and where did u find the patch? I'd like to know. Well, it could be said that I never read the serial entered :-) , but... I check it somehow. how? Does the patch resolves both SAVE (good boy message) and EXIT? how?
l0calh0st 06. Sep 2006	Yes the patch resolves it 0045087C 34 01 xor al,1 to 0045087C 34 00 xor al,0
geeko Author 06. Sep 2006	127.0.0.1, Congratulations. U found a very good spot (can u write a tut on how did u find it, please?), but u need to find the code as I said. Sorry. Let's say it's a key to some treasure :) Do u still work on it, or need some tips?
BaKaE 18. Sep 2006	is the numer "16777215" important, coz it arives while debugging
geeko Author 19. Sep 2006	want some hints?
BaKaE 19. Sep 2006	yes, so what does this number mean?
geeko Author 19. Sep 2006	it is important, coz it;s part of the test. Put it in hex. see something?
geeko Author 25. Sep 2006	d16777215=hFFFFFF=white color! (remember the first comment?)
overhead 26. Sep 2006	hi, it must have to do something with the embedded TImages... "hot spot code" loops through pixels (getpixel). unfortunatelly i cant see, how user input is related to this... patching would be easy :o) but... need some further investigation on this one!
overhead 26. Sep 2006	[cite] Well, it could be said that I never read the serial entered :-) [/cite] hmm... some idea pops up in my lil tired brain... maybe "serial" is checked by its "graphical" representation through pixel... crazy if so :o)
overhead 26. Sep 2006	YEAH......... I GOT IT! :)
overhead 26. Sep 2006	part of serial = 43Uuak/ me makes a lil dance :o) nice ONE geeko!!! i now have to write a tut... but not tonite... keep searching guys... even the color blinds ;o)
geeko Author 26. Sep 2006	Is very good what u did spot. waiting tut thanx
geeko Author 12. Oct 2006	the code is encrypted in an Timage.
Zaphod 26. Oct 2006	Geeko, I'm ripping my hair out over this one! I asssume overhead is right when he says that the serial is checked by it's graphical representation, but when GetPixel breaks with x,y-values within the area of the serial, it returns 0xFFFFFFFF meaning these values are outside the clipping region. And I don't see any cliprgn-functions in the crackme. Arrrgh! By the way, I tried localhost's patch ( xor al,1 -> xor al,0 ). I made no difference on my computer :(
Zaphod 26. Oct 2006	I made no difference on my computer :( should have been It made no difference on my computer :(
geeko Author 27. Oct 2006	zaphod, maybe the clipping region is not visible while u debug it. I dont know... The XOR patch is correct. I think the simplest way is to find the key image and try to decript it using some graphics filters or using the encryption algo within the code.
Zaphod 03. Nov 2006	geeko, I finally found the password ( encrypted in TImage5 ), but I still don't know how you "read" the typed serial. I hope someone will post a solution.
geeko Author 06. Nov 2006	Zaphod, post the solution. Reading the text is not required in this crackme, but you can look at Onkeypress event!
Zaphod 07. Nov 2006	Geeko, I did try to set breakpoints at WM_Keydown and WM_Keyup, but that didn't get me anywhere. But okay, I'll write a short tutorial on how to extract the key from the bitmap, then we'll see if the moderators accept it :)
geeko Author 07. Nov 2006	I don't know exactly how Delphi wraps WM_keyup and WM_keydown messages, but I tell you I surely used form.onkeypress event. Using dede will tell you exaclty where to BP. g'luck
Zaphod 07. Nov 2006	Hey, that's a really smart program, Dede! I just downloaded it, and it should prove very helpful! By the way, I submitted my solution to the program...
geeko Author 08. Nov 2006	Dede is good, but........... Try it on some of my latest crackmes! surprize! ha?

geeko's pukky

Download pukky.zip, 200 kb (password: crackmes.de)
Browse contents of pukky.zip

Find the correct way to play the little game.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 19. Mar, 2009
Downloads: 458

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Solutions

Solution by indomit, published 23. mar, 2009; download (492 kb), password: crackmes.de or browse.

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Solution by T.0.R.N.A.D.0., published 23. mar, 2009; download (201 kb), password: crackmes.de or browse.

T.0.R.N.A.D.0. has rated this crackme as boring crap.

Discussion and comments

T.0.R.N.A.D.0. 20. Mar 2009	Is PATCHING allowed ???
T.0.R.N.A.D.0. 20. Mar 2009	If yes, then I've solved it. :))
indomit 20. Mar 2009	It's very easy to... just start the app with correct params ;)
T.0.R.N.A.D.0. 20. Mar 2009	I agree. Yes, I too got it. (*.exe) ;)
T.0.R.N.A.D.0. 20. Mar 2009	Did NE1 score 200 in the game (without cracking) ? I could score 197 at max. HaHa..
geeko Author 23. Mar 2009	patching is not the correcy way indomit, u may write tuto

geeko's Rainbow

Download rainbow.zip, 195 kb (password: crackmes.de)
Browse contents of rainbow.zip

U have to find one right click combination to color the sqares in such a way to enable the button.
There is no packer, antidebug nor any other trick.
Patch is not allowed.

g'luck

Geeko 2006

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 20. Nov, 2006
Downloads: 986

Rating

Votes: 3
Crackme is good.

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Solutions

Solution by Zaphod, published 29. nov, 2006; download (561 kb), password: crackmes.de or browse.

Zaphod has rated this crackme as quite nice.

Discussion and comments

geeko Author 21. Nov 2006	Hint: look at the sky.
ProTreeBrain 21. Nov 2006	Tommorow try crack it, but I dont see it very good for my success. It is not very interesting protection for me, but I try it.
geeko Author 21. Nov 2006	Which protections do you like?
Zaphod 21. Nov 2006	I found what color the squares should be, so it would be easy to patch the crackme, but that isn't allowed - and it wouldn't be much fun. Now I'm trying to find out in which order the squares should be pressed...
geeko Author 21. Nov 2006	There could be more then 1 good color schemes. Give here an example. Also, there could be several solutions. I didn't test. And to be more chalenging, try to make the sqaures the same color!
geeko Author 21. Nov 2006	Do you think you can solve it if I'd give you the portion of the source code which deals with the clicks without running it ?! :-)) I think I cannot :)
Zaphod 21. Nov 2006	The one solution I have found is ten blue squares. First I arrived at that one by patching, later I was lucky enough to generate 10 blue squares by just playing around with the crackme. But of course I cannot repeat those lucky strokes now, so I'm trying to get an overview of what the different clicks do by looking at them with IDA's graphic view. As for the solving it without running it - I probably couldn't, but who knows :)
ProTreeBrain 22. Nov 2006	I like more usual protections type such keyfile, serial ...
geeko Author 22. Nov 2006	Right,I told you, probably there are more than one click combination. @Protree, I like unusual protection, coz' they are not so boring and not many people expects them. It's your chioce. There are some of my crackmes, than you'd maybe like. Give them a try
Zaphod 22. Nov 2006	geeko, isn't this: 004501EA . C705 383C4500>MOV DWORD PTR [453C38],0FF00 004501F4 . C705 383C4500>MOV DWORD PTR [453C38],0FFFF00 a small mistake? Shouldn't one of the [453C38]'s have been a [453C3C]?
geeko Author 22. Nov 2006	You are right, It's a mistake not so important. But You must leave it as it is for the program to work as expected. Perhaps it doesn't matter.
Zaphod 22. Nov 2006	I have a solution now - will write a little about it...
geeko Author 23. Nov 2006	how did you find it
Zaphod 23. Nov 2006	I'll submit a tutorial today or tomorrow...
movzx 24. Nov 2006	things left only for a tuts.. nice crackme.. reminds me on GridMaker.. :D btw.. your hint works.. thanks.. :D
geeko Author 24. Nov 2006	I told, there may be more solution.
geeko Author 30. Nov 2006	Zaphod. LOLOs very nice. Nicer than I expected. You found a much shorter code than the one I worked on: 348216952083686 thanks good job, Zapho
Zaphod 30. Nov 2006	Thanks, geeko, but you have to tell me - what does LOLOs mean ?
geeko Author 01. Dec 2006	plural of Laughing Out Loud Out
Zaphod 01. Dec 2006	okay, thanks - I only knew LOL...
geeko Author 03. Dec 2006	LOL. If you want more than LOL than you may LOLOLOLOLOLOLOL. :)

geeko's Sugeeku

Download suboku.zip, 227 kb (password: crackmes.de)
Browse contents of suboku.zip

Hi again
there is no antidibug nor packer
This is a combination of tricks. Dedicated to BaKaE :-)

objectives:

- Don't patch the executable! (for at least 2 weeks)
- Enable the 'register' button
- Register the app. Caption changes and 'check' button:
- Enable check button, so if the app is registered and the grid is full and correct, 'check' button click will enable and show 'nice guy' msg.

G' luck!

Geeko

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 19. Sep, 2006
Downloads: 623

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

BaKaE 20. Sep 2006	really nice geeko got three questions 1. can i patch to enable the buttons ? 2. did you use a better "right grid check" than I :) ? 3. what did think which sudoku was more downloaded after 8 days ? (mine was 199)
BaKaE 20. Sep 2006	one thing to add: i think the sudoku is too hard to solve there are not enough numbers given to fill the grid correctly
geeko Author 20. Sep 2006	1.I let u patch after several days of 'not patching' work, but is not accepted as a solution, for the moment. 2.Yes, it checks for all possible solutions. 3.Mine is younger. 4.Adjust the scrollbar for more or less numbers and press 'new'! g'luck PS: I don't know how u generated the grid, but mine is instantly
BaKaE 20. Sep 2006	@ 3. we look after 8 days (28.09.06) you have the choice explain me here how you fill the grid or send the source-code (generaten of grid only) to my mail @4. really nice idea, dude!!
geeko Author 20. Sep 2006	ok: algo is simple. It starts from a ready solved grid. Sudoku has the property: if u swap 2 columns, or 2 rows in the group of 3, the grid remains a correct one. So swap random some pairs of columns and rows and u have a new completed grid. Just show some of the numbers and u have a new problem. Still want the source?
BaKaE 20. Sep 2006	no !! mine: write a random-number into a cell and test there is the same number in row, in column or in "group". if yes take a new number. if all numbers tested and no one worx start at the beginning. this means i have every time a 100 % new grid.
geeko Author 20. Sep 2006	random swaping gets also a 100% new grid. Think about a digit in a 3x3 group, u can move it any where by swaping rows and cols. Endless possibilities.
geeko Author 25. Sep 2006	U may use an external program to do an on memory patch. At a last resort, patch is allowed to make the 'register' button active.
geeko Author 12. Oct 2006	change the color of 2 pixels. move the mouse in a specific way on the screen to register.
geeko Author 06. Dec 2006	now you may patch it

geeko's The beat

Download tempi.zip, 202 kb (password: crackmes.de)
Browse contents of tempi.zip

In this little simple proggy u have to find the way to register it.
Show the registered message.
No patch, s'il vous plait!
Written in pure Delphi, no direct API calls, no ASM.
Uses 19 lines of code (instructions). Not counting declarations and directives.
No packer, no antidebug.
Just some little traps.

g'luck

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 06. Sep, 2006
Downloads: 1044

Rating

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Solutions

Solution by Zaphod, published 25. oct, 2006; download (3 kb), password: crackmes.de or browse.

Zaphod has rated this crackme as quite nice.

Discussion and comments

BaKaE 07. Sep 2006	why did this crackme have so many not visible objects --> 4 Listboxs 1 Editbox 4 Buttons ???
geeko Author 08. Sep 2006	oops. surprize!
BaKaE 08. Sep 2006	are this hidden ressources important ??
geeko Author 11. Sep 2006	Well, you'd have to find out if they are important. Well, some of them are important, some not important. There are fewer important than unimportant
BaKaE 18. Sep 2006	are the editbox and the checkbutton important ??
geeko Author 18. Sep 2006	hmmmm.... no. Go on , want some hints?
BaKaE 18. Sep 2006	yeeeeeeeeeeeesssssssssssss give some hints
geeko Author 19. Sep 2006	hint 1: call me to register :-) hint 2: look for the scrolling text.
geeko Author 26. Sep 2006	want more hints?
overhead 28. Sep 2006	hehe.. i dont need any more hints! got the solution..again very nice, geeko! gee... i really need to write some tuts, eh? :)
geeko Author 04. Oct 2006	U really need to write tut!
geeko Author 12. Oct 2006	press and release a key at the right moment
Zaphod 20. Oct 2006	I found the solution at last! Hint 1 and 2 didn't help at all, but your final hint, which is more like a recipe, helped... A tricky one, Geeko!
geeko Author 20. Oct 2006	Nice. Can u write a tut now?
Zaphod 20. Oct 2006	Yes, I think I'll do that...

geeko's Tunnel

Download tunnel.zip, 224 kb (password: crackmes.de)
Browse contents of tunnel.zip

You have to find the correct code for your computer, make a key gen, To see the 'good boy' message.
It has a decryption routine and few other tricks.

Don't patch!

G'luk

Geeko

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 02. Oct, 2006
Downloads: 593

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Discussion and comments

geeko Author 12. Oct 2006	didnt you even try?
Sunshine 27. Dec 2006	Just had look at it: when I connect as a client to the crackme and send any value (doesn't matter which one), I get an error saying "x is not a valid integer value". In fact it's an exception, so I just want to know if this is a bug or a part of the crackme?
geeko Author 27. Dec 2006	I am in vacation. so please wait 2 days, so I can review the sources, and check the problem. thanks g'luck
geeko Author 29. Dec 2006	Is not a bug. is the result of the misuse of the crackme. You don't need to conect to it! You found a wrong way to send something to it. g'luck
geeko Author 29. Dec 2006	use the edit box to input serial!

gemigis's Gemigis #1

Download CrackME_gemigis_1.zip, 6 kb (password: crackmes.de)
Browse contents of CrackME_gemigis_1.zip

A simple app ... or is it? ;)

this is my first Crackme, bare with em...

Feel free to make a keygen, crack/patch or whatever you like. Just allow the prime num calculation to finish. let me know how you did it.

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 17. Mar, 2009
Downloads: 390

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Solutions

Solution by indomit, published 20. mar, 2009; download (1169 kb), password: crackmes.de or browse.

indomit has rated this crackme as quite nice.

Discussion and comments

Send a message to GENNADY22 »

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Discussion and comments

Genaytyk Author 19. Feb 2006	Hello, no challenger here? :p Requiem has made a great tutorial for my crackme, available here : http://reverseengineering.online.fr/spip/article.php3?id_article=57
Shism 20. Feb 2006	wish there was a transalation ...
Genaytyk Author 21. Feb 2006	Ah yes, I have forgotten not everybody understand french...
jE! 05. Jul 2008	solve is here http://defisfc.free.fr/affDefi.php?numDefi=75
simonzack Moderator 28. Sep 2008	whoa finally managed to convert the vm code to x86, took me 2 days :S
Genaytyk Author 07. Oct 2008	You converted it manually? Keep working :)
simonzack Moderator 08. Oct 2008	nah it's impossible :p it took long cause it's like my first try at converting the converted code got most of it right, just the really big encryption proc has some problems, i still need to figure out why

GENNADY22's ILUXA

Download ILUXA.zip, 12 kb (password: crackmes.de)
Browse contents of ILUXA.zip

Please find correct password
All answers send to:
iluxa.v@gmail.com
genady22@gmail.com

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 19. Jul, 2007
Downloads: 1090

Rating

Votes: 7
Crackme is quite bad.

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Solutions

Solution by Stardust, published 25. aug, 2010; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

UFO-Pu55y 20. Jul 2007	Hi, just one question: Erm.. hehe.. is it supposed to crash, when trying to execute following line: Dim properties As OleDocumentProperties = New OleDocumentPropertiesClass =>"A first chance exception of type 'System.Runtime.InteropServices.COMException'" Greets
zairon Moderator 21. Jul 2007	No crash here
KernelJ 21. Jul 2007	I got the same error. I don't think 'crash' was meant literally here. I only got a messagebox saying "ERROR" every time I tried to enter a password. For that reason, it is impossible to enter the correct password, whatever that is (I believe pross.hac file is somehow related :P)
UFO-Pu55y 21. Jul 2007	Yeah, sry.. I didn't mean crashing at all. The code line I posted ALWAYS raises an exception, which never let's an entered password being validated. This doesn't depend on the entered pass nor on the pross.hac file. So if the buggy Interop.DSOFile.dll (or its buggy use) is intended to be debugged/hacked (which I didn't try), it really shouldn't be called Level 1 CrackMe, should it ? o0 Sry, if I'm wrong.. just wondering Greets
ChupaChu 23. Jul 2007	Exactly UFO-Pu55y, value from file never gets compared with the one from textbox because of an exception. This is probably programing error, as it is rated Very easy..
-Lord Virus- 25. Jul 2007	Where is the author?¿?...
rydah 28. Aug 2007	Error on load, unable to open this crackme.
Wasted_Bytes 28. Aug 2007	Unable to open.Error on opening
zairon Moderator 28. Aug 2007	No problem on running the file here. Can you tell us more about your problems?
Shism 29. Aug 2007	works fine here... Just extract all the files into a folder and run the application
costy 04. Jul 2008	@zairon The problem is that the program never makes a comparation becouse there is an exeption while reading the file. The program doesn't crash becouse the crackme catchs the exeption. But it doesn't work.
costy 04. Jul 2008	i got the same problem as KernelJ, UFO-Pu55y, ChupaChu
costy 08. Jul 2008	@moderators. This application is a NET application. It's not a Visual Basic application
Tenshi 02. Apr 2010	this crackme has no password, it uses dsofile.dll for the password routine, it takes the customproperty "U" of the "pross.hac" file, which have no custom property "U"... ive done a solution but it was rejected!

genuine's gencryptme

Download gencryptme.zip, 96 kb (password: crackmes.de)
Browse contents of gencryptme.zip

This is my first public crackme, I was testing myself with some encryption algo, i added a little bit of challenge on top of the crypto, but nothing too difficult. played with compiler settings so good luck with bad disassembler :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 24. Sep, 2013
Downloads: 266

Rating

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Solutions

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Discussion and comments

idid231 24. Sep 2013	doesn't run on my XP - SP3, peid says Not a valid PE file, any trick or just my system?
genuine Author 24. Sep 2013	updated submission, now runs on XP SP3 +

gErM66's Beginners Luck

Download germ66_crackme_v1.zip, 3 kb (password: crackmes.de)
Browse contents of germ66_crackme_v1.zip

This is a CrackMe, not a solution.

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 19. Mar, 2004
Downloads: 951

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Solutions

Solution by gErM66, published 20. mar, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by Bytedevil, published 19. mar, 2004; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

geyslan's crackme.01.32

Download crackme.01.32.tar.gz, 2 kb

Just discover the password.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 13. May, 2013
Downloads: 437

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Solutions

Solution by x3ae12, published 16. mar, 2015; download (2 kb), password: crackmes.de or browse.

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Solution by mitsurugi, published 09. dec, 2013; download (4 kb), password: crackmes.de or browse.

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Solution by d0ping, published 18. jun, 2013; download (4 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

geyslan Author 22. May 2013	Hi, I'm waiting solutions. ;)

geyslan's crackme.02.32

Download crackme.02.32.tar.gz, 2 kb

A naughty one! This second version has more tricks to you play with.

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 13. May, 2013
Downloads: 311

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by tvk6843, published 27. dec, 2014; download (3 kb), password: crackmes.de or browse.

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Solution by mrmacete, published 30. sep, 2014; download (4 kb), password: crackmes.de or browse.

mrmacete has rated this crackme as nothing special.

Solution by d0ping, published 18. jun, 2013; download (6 kb), password: crackmes.de or browse.

d0ping has not rated this crackme yet.

Download crackme.03.32.tar.gz, 481 b

Discussion and comments

geyslan Author 22. May 2013	I'm waiting solutions. :D
xGeek 06. Oct 2013	nice one :D (XOR <3)
blankwall 03. Jul 2014	Bit easy for level 3...

geyslan's crackme.03.32

How can I tell you? :D

This is a tiny crackme written in assembly. It has no input, so you have to modify it to complete the mission.

Difficulty: 4 - Needs special knowledge
Platform: Unix/linux etc.
Language: Assembler

Published: 13. May, 2013
Downloads: 265

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Solutions

Solution by mrmacete, published 16. oct, 2014; download (7 kb), password: crackmes.de or browse.

mrmacete has rated this crackme as quite nice.

Solution by accipiter, published 09. sep, 2014; download (4 kb), password: crackmes.de or browse.

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Solution by d0ping, published 18. jun, 2013; download (4 kb), password: crackmes.de or browse.

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Send a message to ghiribizzo »

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Discussion and comments

geyslan Author 22. May 2013	Hi, I'm waiting solutions. :)
loizos 16. Jun 2013	I'll give it a shot :P
loizos 16. Jun 2013	Its 64 bit sorry i am learning 32bit atm.Plus Ollydbg loads only 32 bit
geyslan Author 21. Jun 2013	It's 32 bits. Use gdb instead.

ghiribizzo's caveman

Download caveman.zip, 2 kb (password: crackmes.de)
Browse contents of caveman.zip

caveman is actually a game !

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jul, 2002
Downloads: 1607

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to GordonBM »

View profile of GordonBM »

Discussion and comments

redoC 10. Jul 2012	holy brutus, this one stay uncracked for veeery long time
ReWolf 22. Jul 2012	Now it's cracked, keygen is ready, but I still need to write solution.
gim913 Author 25. Jul 2012	Congratulations Sir, impressive work. I really liked how you've found functions, and the approach with setting bpx on proper one. Also thanks for high rating :) ATM I'm thinking about level1 puzzle-like crackme, that should be accessible to more people, but should be fun to do.

Solution by Ruev, published 18. aug, 2010; download (23 kb), password: crackmes.de or browse.

Ruev has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

Stardust 17. Aug 2010	Solution uploaded... I will not post my serial here. It tells something about my hardware ;-)
saitob 18. Aug 2010	Solved. This is not difficulty 2, but rather 1...

GordonBM's Keygen Me #1 - GordonBM

Download Crackme_by_GBM.zip, 7 kb (password: crackmes.de)
Browse contents of Crackme_by_GBM.zip

My first crackme =)
Should be easy.

Rules:
No Patching
Find Valid Serial for your name
Make Keygen

Cheers,
GBM

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 17. Jan, 2009
Downloads: 768

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Solutions

Solution by Igor1201, published 25. apr, 2009; download (299 kb), password: crackmes.de or browse.

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Solution by boon, published 22. jan, 2009; download (77 kb), password: crackmes.de or browse.

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Discussion and comments

GordonBM Author 19. Jan 2009	Please write a solution and a tutorial instead of posting the answer here. Thanks.
indomit 12. Feb 2009	Good w&h tricks, but password depends on the length of name... Anyway I'm waitin somethin more difficult :)
Igor1201 22. Apr 2009	If you don't want to make passwords like 88465,5918367346 your crackme is wrong.. =P

GordonBM's Keygen Me #2 - GordonBM

Download KeygenMe2byGordonBM.zip, 9 kb (password: crackmes.de)
Browse contents of KeygenMe2byGordonBM.zip

I worked hard on this crackme, it's "easy", but not THAT easy.
You WILL need math skills and also common sense.

Good Luck!!

Rules:
-No Patching
-Make a keygen, you can also post a working key for your name.
But if you do that, you might aswell post a solution on how you got to it.

Also dont post the algorithm here. Post a solution.

Enjoy,
GBM

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 22. Jan, 2009
Downloads: 315

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by juza, published 30. jan, 2009; download (1194 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 22. Jan 2009	The first two serials you gave us as hint don't work for me.
GordonBM Author 22. Jan 2009	Actually they do. It's a trick. Enter the serial again and press Register multiple times and you will eventually get the good boy message. That's the trick ;)
yuri99 24. Jan 2009	PS: Difficulty 0 - too easy, no exe protection, can you read whole source code. Console.WriteLine(this.seriallll.Text) and can you see all serials in output window :D
simonzack Moderator 24. Jan 2009	don't even need to do that just copy, paste code from reflector
GordonBM Author 24. Jan 2009	Aw...shit....lol Ah well, congratulations. .NET crackme's are really easy apparently lol.

GordonBM's Reverse Keygenme

Download Reverse_Keygenme.zip, 5 kb (password: crackmes.de)
Browse contents of Reverse_Keygenme.zip

RULES:
-Reflector NOT allowed!
-Include your how-to readme!

You are given a keygen.

There are 2 modes.
The first one is the easiest as someone with a little computer knowledge should easily figure it out.

The second one is a little trickier. But the alghorithm is fairly easy if you can find it.

The purpose is that you make the opposite of this. So I put in the generated key from the original file and your program returns the string.

For example.
GordonBM gives (hardcore mode):
9247109931023928283286380308924708453882326686447837

Engineer it so that when I put in
9247109931023928283286380308924708453882326686447837, its gives me GordonBM

However, the key you get is different every time.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 25. Jun, 2014
Downloads: 890

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Solutions

Solution by baderj, published 14. jul, 2014; download (203 kb), password: crackmes.de or browse.

baderj has rated this crackme as awesome.

Send a message to GR33d »

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Discussion and comments

iSSoGoo 27. Jun 2014	Is this really fully reversible? Easy mode is easy, but hardcore mode is not unique, for example 'A' and 'S' both give 83.
sfguy1980 12. Sep 2014	Virus stuffed rar well funny! Avira got you!

GR33d's B2c_2k5_1

Download b2c_2k5_1.zip, 7 kb (password: crackmes.de)
Browse contents of b2c_2k5_1.zip

Hi :)
this is my first keygen me, it a easy one, maybe for newbies, a fun one.
just make a keygen and a tute for this keygen me.

c ya in next keygen me

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 22. Jul, 2005
Downloads: 799

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Solutions

Solution by Knight, published 23. jul, 2005; download (20 kb), password: crackmes.de or browse.

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Send a message to Greedy_Fly »

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Discussion and comments

Ox87k 22. Jul 2005	my god, i solve it... i make a keygen who work but... i don't understand the final CMP EDI, 0 :\| Ur keygenme don't use, in the check routine, the register EDI... so EDI will always remain not equal to 0 :\| Do i'm mistaking myself? (sorry for english!)
GR33d Author 23. Jul 2005	lol :) how did ya pass trought the last Call EBX ???? the cmp edi,0 is the last protection the thing is, u must have edi = 0 after the ebx call (srry for whos trying to solve it yet :P)
Ox87k 23. Jul 2005	In the 'call ebx' there are only 2 'cdq' but this instruction sets only the 'edx' register! Maybe you did a mistake!
GR33d Author 23. Jul 2005	Thats the deal, the 2 'cdq' insructions are there because they are made from the serial!! u gotta find a way to leave edi=0 INSIDE de call, ur serial is suposed to be a opcode that leaves esi = 0 and checksum = 285h!
Ox87k 24. Jul 2005	yeah! I do it, only now i understand ;) but... too late! Knight do it before me... :'( However, good crackme Gr33d ;)

Greedy_Fly's CrackMe v1.0

Download CrackMe.zip, 43 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Hi, All!

Test It...
Although I guess It can be boring!)))))

Solution: keymaker or keyfile & solution.txt

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 03. Sep, 2013
Downloads: 585

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Solutions

Solution by Destinaxe, published 09. dec, 2013; download (3 kb), password: crackmes.de or browse.

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Solution by negux, published 24. sep, 2013; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

xiayuanzhong 09. Sep 2013	Oh, my god... All the algorithm are in DlgProc... I have tried to change two jumps to make it NoCheck successfully...XD All right, I'll still try to wirte KeyfileMaker.
pxor 21. Sep 2013	I was just wondering. Am I really a good cracker? or should my skills be replaced with cm.dll :(
xiayuanzhong 24. Sep 2013	@pxor Tips: "cm.dll" is the key file, and it's a text file actually.
beaver 24. Nov, 18:40	I've cracked it with notepad and calculator, lol.

Greedy_Fly's CrackMe v1.1

Download CrackMe1.1.zip, 43 kb (password: crackmes.de)
Browse contents of CrackMe1.1.zip

Hi, All :))

Test It!

Rules: Valid Serial and solution.txt

Have fun)

Greedy Fly

//Don't post your solution(Serial) on the board!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 09. Oct, 2013
Downloads: 496

Rating

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Solutions

Solution by barun, published 28. nov, 2013; download (309 kb), password: crackmes.de or browse.

barun has rated this crackme as quite nice.

Solution by XpoZed, published 20. oct, 2013; download (48 kb), password: crackmes.de or browse.

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Discussion and comments

barun 31. Oct 2013	The crackme was not working properly on Win7 x86. Had to remove the following for it to work correctly. Otherwise it was always generating an unhandled exception 00401357 PUSH 0040136C 0040135C PUSH DWORD PTR FS:[EAX] 0040135F MOV DWORD PTR FS:[EAX],ESP 00401362 PUSH 9C42 00401367 CALL <JMP.&kernel32.CloseHandle>

Greedy_Fly's CrackMe v1.2

Download CrackMe.zip, 44 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Hello, cracker :))
Test It!
It shouldn't be hard!!!

Rules: Valid Serial and solution.txt

Greedy Fly

//Don't post your solution(Serial) on the board!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 19. Sep, 2014
Downloads: 742

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Solutions

Solution by bike, published 28. sep, 2014; download (2 kb), password: crackmes.de or browse.

bike has rated this crackme as quite nice.

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Discussion and comments

redoC 21. Sep 2014	I think there's bug at 0040270C TEST BYTE PTR [ESP+1], 1 anyway serial is z...5
redoC 28. Sep 2014	bike: it's a NEWDES algo and crackme contains also decoding routine
bike 01. Oct 2014	I didn't know, thanks for info :)
beaver 28. Nov, 10:43	redoC: this bug appears only when TeamViewer runnung, strange.

Greedy_Fly's CrackMe v1.4

Download CrackMe.zip, 37 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Hi, All...

Solution: Valid Serial and solution.txt

//Don't post your solution(Serial) on the board!

Have Fun!

Greedy_Fly

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 20. Jan, 2016
Downloads: 357

Rating

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Solutions

Solution by acruel, published 09. feb, 2016; download (2 kb), password: crackmes.de or browse.

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Solution by Tnavarro, published 09. feb, 2016; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

acruel 25. Jan, 15:31	Found serials. Will submit a solution later.
korsader 31. Jan, 01:13	Only brute force?
Greedy_Fly Author 31. Jan, 11:50	I guess it is not necessary...

Greedy_Fly's CrackMe v2.0

Download CrackMe.zip, 67 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Hi, All...

Test Your Skills... ))))

Solution: Valid Serial and solution.txt

//Don't post your solution(Serial) on the board!

Have Fun!

Greedy_Fly

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 22. Apr, 2015
Downloads: 601

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Solutions

Solution by baderj, published 23. apr, 2015; download (498 kb), password: crackmes.de or browse.

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Discussion and comments

Greedy_Fly's CrackMe v 1.3

Download CrackMe.zip, 31 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Hi, All!!!

I guess difficulty of this crackme - 3?

Solution: Valid Serial and solution.txt

//Don't post your solution(Serial) on the board!

Have Fun!

Greedy_Fly

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 01. Oct, 2014
Downloads: 641

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by Gyver75, published 14. oct, 2014; download (1197 kb), password: crackmes.de or browse.

Gyver75 has rated this crackme as nothing special.

Solution by dandries, published 13. oct, 2014; download (3 kb), password: crackmes.de or browse.

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Solution by baderj, published 13. oct, 2014; download (65 kb), password: crackmes.de or browse.

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Discussion and comments

IamLupo 07. Oct 2014	I got it :D It is a good practice ^_^ Thx! :D I will submit my solution later ! ^_^
Balthasar_magus 07. Oct 2014	i did it ;) not so easy, but can solved
Gyver75 08. Oct 2014	it's funny, in my opinion the difficult is try to understand how this crackme checks the key's length ...
5p4d3r 22. Oct 2014	I didn't reverse the keygen algorithm but patched to accept any input as valid. Should I still write a solution? It could be nice to illustrate the Windows Message event driven model of programming.
evaboy 22. Oct 2014	@sp4d3r: you can explain it in here or elsewhere given the link, for us to learn. Thanks man!
5p4d3r 22. Oct 2014	Sounds solid. I'll write it up and post it. It was a fun challenge. I am still wrapping my head around the Floating Point instruction sets for x86 processors but sometimes less is more. :)
kipkop 23. Oct 2014	PLS somebody decrypt me the activation codes, keygen,, full access (functions are key-depends) of "neoSys" software. http://www.softworks.ro/download/CrackMe.zip.html Contact me at kip.kop@freemail.hu I bought the activation code, but isn't work, and no answer for my contacts.
evaboy 23. Oct 2014	@kipkop: if you are the author of the app, l think it will be better for you to extract the protection routine, convert it to a keygenme or crackme and upload it as a challenge.

Greedy_Fly's KeygenMe v1.5 by Greedy_Fly

Download KeygenMe.zip, 43 kb (password: crackmes.de)
Browse contents of KeygenMe.zip

Hi, All...
It should be easy!!!
Solution: Only Keygen + (If possible, write a tutorial...)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 25. Feb, 2013
Downloads: 862

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by Xartrick, published 30. may, 2013; download (196 kb), password: crackmes.de or browse.

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Solution by iSSoGoo, published 30. may, 2013; download (71 kb), password: crackmes.de or browse.

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Discussion and comments

Greedy_Fly Author 23. May 2013	No solution??? It seems strange!
sjheiss 29. Jun 2013	This is not anywhere near a level 1 crackme... more 3 or 4.
beaver 20. Nov, 07:04	Good job, man. Keygen uses MD2 hash and modify result with `calc' function from dat file. Can i use this dat file in my keygen? ;)

Greedy_Fly's KeygenMe v1.6

Download KeygenMe.zip, 42 kb (password: crackmes.de)
Browse contents of KeygenMe.zip

Hi, All...
This is another keygenMe for beginners!!!
Solution: Only Keygen + (If possible, write a tutorial...)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 30. May, 2013
Downloads: 1554

Rating

Votes: 8
Crackme is nothing special.

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Solutions

Solution by IRCxB0T, published 01. dec, 2013; download (6 kb), password: crackmes.de or browse.

IRCxB0T has rated this crackme as nothing special.

Solution by BunnX, published 08. jun, 2013; download (123 kb), password: crackmes.de or browse.

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Solution by iSSoGoo, published 08. jun, 2013; download (15 kb), password: crackmes.de or browse.

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Discussion and comments

seVeb 08. Aug 2014	Thanks for making this crackme, I had a blast solving it :)
tiphergane 16. Sep, 10:04	solved, not clean but fonctional

Greedy_Fly's KeygenMe v1.7

Download KeygenMe.zip, 41 kb (password: crackmes.de)
Browse contents of KeygenMe.zip

Hi, All! ... Just another my old KeygenMe....
I guess it's easy!

Solution:
Only keygen + solution.txt )))

Have Fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 31. Jul, 2013
Downloads: 294

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by KMore, published 11. aug, 2013; download (30 kb), password: crackmes.de or browse.

KMore has rated this crackme as nothing special.

Solution by sisco_0, published 11. aug, 2013; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

CrackMyAss 01. Aug 2013	Too many functions..........
korsader 01. Aug 2013	A-ha-ha Well, you joker. Good keygenme.
givses 02. Aug 2013	User: 0123456789 Serial:521B95B5-D8B156F4-8CB9FB31-F954F676
iSSoGoo 02. Aug 2013	@givses: I doubt that this is a valid combination, the real calculation of the serial is much more complex than that ;)
zairon Moderator 03. Aug 2013	It's far from being a valid combination, I think you have to spend some more time over this crackme :)
CrackMyAss 03. Aug 2013	looks fun, I shall try~
korsader 04. Aug 2013	many names to which you can not get the key. for example 'crackmes'
iSSoGoo 04. Aug 2013	Of course there is a serial for that name, check your PMs ;)
korsader 04. Aug 2013	Thank you. In my keygen is a mistake.

Greedy_Fly's KeygenMe v1.8

Download KeygenMe.zip, 43 kb (password: crackmes.de)
Browse contents of KeygenMe.zip

Test It!!!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 06. May, 2013
Downloads: 387

Rating

Votes: 8
Crackme is nothing special.

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Solutions

Solution by BunnX, published 03. jun, 2013; download (125 kb), password: crackmes.de or browse.

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Solution by iSSoGoo, published 13. may, 2013; download (62 kb), password: crackmes.de or browse.

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Discussion and comments

hPl0w 11. May 2013	is very difficult for me...
deeplay111 22. May 2013	Thanks for the writer!
DimitarSerg 25. May 2013	iSSoGoo, in your solution you wrote: The resulting value is used as an offset for the DWORD array starting at 00403080 ...... It's standart crc32 table ;)
iSSoGoo 25. May 2013	Yes, I didn't knew that the time i wrote the tutorial, the other algo is Adler-32 :D
beaver 06. Dec, 18:49	two words: CRC32 with ADLER32, and half of job is done

Greedy_Fly's KeygenMe v1.9

Download KeygenMe.zip, 339 kb (password: crackmes.de)
Browse contents of KeygenMe.zip

Hi, All...
Test it! My first KeygenMe in Borland Delphi...
Solution: keygen + source code + solution.txt

Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 10. Aug, 2013
Downloads: 388

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by redoC, published 03. apr, 2014; download (634 kb), password: crackmes.de or browse.

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Discussion and comments

redoC 17. Mar 2014	_redoC_:6F334D4E7769475561673D3D Difficulty: 3-4
tomkol 05. Dec, 14:57	Quite nice keygenme. As for protection it can be reduced to simple xor and base64 encoding. Tutorial + keygen soon.

Greedy_Fly's Night In Odessa

Download KeygenMe.zip, 38 kb (password: crackmes.de)
Browse contents of KeygenMe.zip

Hi, All...

Test It!

Solution: only keygen + source code + solution.txt

Good Luck!)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 03. Sep, 2013
Downloads: 260

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Solutions

Solution by s3Rious, published 24. sep, 2013; download (21 kb), password: crackmes.de or browse.

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Solution by demoth, published 05. sep, 2013; download (29 kb), password: crackmes.de or browse.

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Discussion and comments

idid231 04. Sep 2013	Can i have a real combo for this keygenme? As i coded my kgm, hard to find a name which has a serial.
demoth 04. Sep 2013	idid231, for example: name: demoth serial: 29E7E9B5A
idid231 05. Sep 2013	Very well, your key is good, thank you demoth, i need to see why my keygen doesn't work.
idid231 06. Sep 2013	So quick! I still don't know where i'm wrong even read your solution. As i know Input serial is: yEx My name: Lovemagic gives 01461C3F => x = 1C3F i compute my serial: y = (x + 0x7E) div 4 (i changed div 4 to shr,2 too) y = y xor 0x2EC9 => y = 0x29E6 but in keygen: Lovemagic has 69E6 as serial i wonder where i'm wrong, look at demoth's src i see my code is same as his
demoth 06. Sep 2013	01461C3F => x = 1C3F, y = 0146 x1 = ror2(x + 0x7E) ^ 0x2EC9; y1 = (y ^ 0x4DE2) << 1;
idid231 06. Sep 2013	i see, it's in your source code, but as i said x1 = ror2(x + 0x7E) = (0x1C3F + 0x7E) div 4 = 72F 0x72F xor 0x2EC9 = 29E6. Your keygen gives me 69E6 instead, could you please help me find where i'm wrong.
demoth 06. Sep 2013	ror2 != div 4. div 4 equals shr 2. If you're coding in vb you need something like this for ror2: (val div 4) + (val mod 4) * (2 ^ 14)
idid231 07. Sep 2013	Great, Thank for your info!

GREENeggZandSAM's SamBo #1

Download SamBo.zIp, 277 kb (password: crackmes.de)
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Very Very Easy, My first crackme. Find the serial (hardcoded). - SamBo

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 02. Dec, 2004
Downloads: 2020

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Solutions

Solution by REA-CrAcKeRtEaM, published 06. dec, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by haggar, published 03. dec, 2004; download (850 b), password: crackmes.de or browse.

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Solution by scarabee, published 03. dec, 2004; download (882 b), password: crackmes.de or browse.

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Discussion and comments

hironez 27. Aug 2009	Can somebody explain the process of unpacking this in more depth? I don't understand how to do it. I have managed to crack every crackme prior to this one! So I don't know! :/ I have searched for help on google with no success! Please help if you can!

GROB_T's KeyGenMe №1 by GROB_T

Download KeyGenMe_by_GROB_T.zip, 10 kb (password: crackmes.de)
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It's my first KeyGenMe
If name and password correct, appears the message "Valid password" differently "Wrong password"

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 22. Oct, 2009
Downloads: 422

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Solutions

Solution by redoC, published 14. sep, 2010; download (30 kb), password: crackmes.de or browse.

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Discussion and comments

Zuma555 24. Oct 2009	Caught my sight... will be posting a solution soon when i got some time
apuromafo 02. Nov 2009	nice conditions, .valid key have, but keygen mm..more time..nice crackme greets.
redoC 02. Sep 2010	Contains a bug, cycle runs for 13 times(should be 12) and reads memory beyond SerialString buffer.
r-Evolution 04. Sep 2010	Do the serials contain any special characters i can't find what these bytes are 0D 0A nice one anyway
Coderess 05. Sep 2010	Find ascii.pdf full description of chars

Grzzlwmpf's CrackMe (Didn't think about a name)

Download CrackMe.zip, 33 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Yup, my first CrackMe. I don't know the scale of the difficulty, so I set it to two (hope I'm right, you cann tell me yourself, thx). Written in .NET. It could probably be that I messed up the definition of CrackMe and KeygenMe, so, it could be a KeygenMe. If yes, sorry guys :).

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 14. Dec, 2013
Downloads: 761

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Mr.reCoder, published 02. jan, 2014; download (1 kb), password: crackmes.de or browse.

Mr.reCoder has rated this crackme as boring.

Solution by stlcoder, published 02. jan, 2014; download (6 kb), password: crackmes.de or browse.

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Solution by draww, published 02. jan, 2014; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

draww 16. Dec 2013	solved & tut submitted yesterday. thanks for this CM
Unknown Coder 22. Dec 2013	cracked :D , Nice.You find my backdoor. Grzzlwmpf ; backdoor
LordCoder 23. Dec 2013	Solved but solution is not uploaded until :(
jchillerup 23. Dec 2013	My first .NET crackme! :-) Very easy but alas I wasn't able to develop a crack because I didn't know how to change the IL and recompile. Should be a simple matter though. Thanks!
Russriguez 04. Jan 2014	Since creator includes such a nice encryption class, its pretty easy to just copy that to find the answer. I'd have said difficulty should be set as 1, in which case its a nice gentle starter - I've seen others at level 1 that involve messing about with binary shifting and nested loops designed to confuse.
XpoZed 05. Jan 2014	I've published my solution on my website. I don't think that easy crackmes are boring, if you know how to spice them up in your solution.
zane_zhang 12. Feb 2014	Only need to do is to change a byte
MysteryDash 06. Jul 2014	It was easy, four things are done !
081114 11. Aug 2014	It's neither a Keygen- or CrackMe. Basically its an Open&CopyMe. Good luck to all newbies anyway.
Silverhawk 14. Sep 2014	Decent little starter crackme. Used: DIE to find out it was .net dotPeek to dump to source VS2010 to pull routines and code the keygen.

gSuzCrack's First Keygen/Crack-Me by gSuzFre@k

Download KeygenMe_by_gsuzfreak.zip, 14 kb (password: crackmes.de)
Browse contents of KeygenMe_by_gsuzfreak.zip

Simple KeygenMe by gSuzFre@k
----------------------------

Hey!
Feel free to crack and/or patch it if you want. I have added a little protection against this but since
I am a noob i don't know if it was worth the time i needed for coding it :D The keygen-algorithm itself
is just a simple XOR, so it shouldn't be very hard for the most of you. There is also a little bit
of junkcode

I accept any solutions. Just do want you want to display the Goodboy-Messages
However, I would be very glad if you let me know how you solved it and how easy or how hard it was for you

Best Regards,
gSuzFre@k

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 15. Apr, 2015
Downloads: 905

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Matteo, published 22. apr, 2015; download (250 kb), password: crackmes.de or browse.

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Discussion and comments

spawncpy 15. Mar 2015	The function that says to Try Harder Next time is at 0x00403A20 The function that says you cracked it, is at 0x00403B20 Use PlaceJMP to write to 0x00403A20 and make a custom function Your custom function is going to JMP to 0x00403B20 __declspec(naked) gotogood() { __asm JMP 00403B20 } PlaceJMP((BYTE*)0x00403A20, (DWORD)gotogood, 5);
Coderess 15. Apr 2015	I found key, but havent free time to write keygen and solution! Key sent to authors pm
Matteo 15. Apr 2015	I have done it too, i have spent much time on it because it had a bug (now fixed) that made it impossible to solve without patching. Keygen also done. Working for tutorial...
borismilner 22. Apr 2015	Sorry for the super-n00b question, but how do I approach such a problem when I see a whole bunch of sub_routines? I seem to get frustrated way before I get the right picture in my mind - please help me get on track :)
Matteo 22. Apr 2015	that happened to me too :) as i said in the solution, is full of complex code for simple operations. IDA might help as it can display graphs, comments help too, you can see passed arguments and returned value ignoring what happens inside if possible. example: user: abc call something user: abc (so the call is probably not important because it does nothing over user or pw) In a first moment i searched for the good/bad message and fished the serial, only after i started search how does it work. anyway you will need some time. if someone has more tips let us know!!!
acruel 11. Oct 2015	I've written just another keygen in Python, but it was not very easy for me. :) http://pastebin.com/b8SYReXP
specx 25. Feb, 17:31	Finally, I managed to write a keygen. This one was really hard for me :)

GTKSOR's 1337_ARM

Download 1337_ARM.zip, 251 kb (password: crackmes.de)
Browse contents of 1337_ARM.zip

this crackme is " 1337ARM.bin: ELF 32-bit LSB executable, ARM, EABI4 version 1 (SYSV), statically linked, for GNU/Linux 2.6.16, not stripped "
when you enter the correct password it will print out "1337" !

so the task is just figure out the secret password , nothing else is allowed !

Good luck !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Unspecified/other

Published: 23. Sep, 2015
Downloads: 167

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Solutions

Solution by acruel, published 26. oct, 2015; download (2 kb), password: crackmes.de or browse.

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Solution by mrmacete, published 26. oct, 2015; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

acruel 26. Sep 2015	The main returns 1337, but prints out nothing. Am I missing something?

GTKSOR's GTK_K3YG3NME

Download GTK_K3YG3NME.zip, 5 kb (password: crackmes.de)
Browse contents of GTK_K3YG3NME.zip

welcome to GTK KEYGEN ME .
note that no patching or self-keygenning or ... is allowed , just a working Keygen.

and have a good luck !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Unspecified/other

Published: 22. Jul, 2015
Downloads: 137

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Solutions

Solution by mrmacete, published 29. jul, 2015; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

mrmacete 30. Jul 2015	what tool did you use to insert the out-of-sync rdtsc's ?

Guetta's Christmas Keygenme

Download Christmas-KeygenMe.zip, 299 kb (password: crackmes.de)
Browse contents of Christmas-KeygenMe.zip

Merry christmas 2 all the crackmes.de community,
here is my little present =)

Goal: make a keygen and/or write a tute.

Stuff: U'll see by yourself :)

Guetta.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 03. Jan, 2007
Downloads: 1055

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by profdracula, published 08. jan, 2007; download (18 kb), password: crackmes.de or browse.

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Solution by HMX0101, published 04. jan, 2007; download (207 kb), password: crackmes.de or browse.

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Solution by Crosys, published 04. jan, 2007; download (118 kb), password: crackmes.de or browse.

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Discussion and comments

Guetta Author 03. Jan 2007	Well ... i'm late for christmas but ... try it =)
HMX0101 03. Jan 2007	Same as me... =( but this is a pretty and easy one :D Good job, Guetta!
Ox87k 03. Jan 2007	Well, going to write a solution Guetta ;) and... hi hmx0101 =)
profdracula 03. Jan 2007	Hmmm....interesting. Will write a solution tomorrow. Hi HMX0101 and 0x87k :)
HMX0101 03. Jan 2007	Hi guys... maybe i write a tutorial too :) but i have to fix the computer first =/
Guetta Author 03. Jan 2007	Thank you guys for keygenning my proggy : ) profdracula: I remember my second keygenme, it was yours ; )
l0calh0st 03. Jan 2007	Bit easier then your previous ones :) Happy new year everybody :)
Guetta Author 03. Jan 2007	Hehe, hope that you'll look at my next one, I'll try to make it really harder =)
profdracula 04. Jan 2007	Hi Guetta! Hope u enjoy my Cryptok KeygenMe {1} as well.
Guetta Author 04. Jan 2007	x15or : mistake in your solution : "Crackme: HMX0101's XMAS Crackme!" :( it's mine you know =)
Crosys 04. Jan 2007	ah god damnit, i used the same body for those tutorials, sorry mate
Ox87k 04. Jan 2007	lol, HMX0101 and x15or too fast for me :P well, i think it need no one solution.. Good job guys!
HMX0101 04. Jan 2007	Ox87k... is good to see another point of view about the crackme ;)
lord_Phoenix 06. Jan 2007	i wont write a tute :p crackme is nice, but too easy.. ma kg was publushed on Guetta's page.. ps. welcome Gueatta as REVENGE member! =)

Guetta's Fortress

Download Fortress.zip, 39 kb (password: crackmes.de)
Browse contents of Fortress.zip

Hello there =)

Here's a little challenge for you to play with, not that hard, some logic and programming skills needed.

Have fun,
Guetta

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 05. Jun, 2012
Downloads: 317

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Solutions

Solution by redoC, published 23. jul, 2012; download (393 kb), password: crackmes.de or browse.

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Solution by HMX0101, published 20. jun, 2012; download (173 kb), password: crackmes.de or browse.

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Discussion and comments

ranyeva 07. Jun 2012	Does it use Internet comprobation? I tried to found the comprobation jump, but I didn't find it Any tip or hint?
Guetta Author 07. Jun 2012	Hi ! Yes, to register you need an Internet connection :)
Guetta Author 07. Jun 2012	@ranyeva: Please, read your PM's and stop investigations here.
redoC 17. Jun 2012	"Invalid activation code" ...pls give me a tip, how to construct last group of numbers in activatin code? should we use bruteforcing?
Guetta Author 18. Jun 2012	Well done, you've done the first part :) Okay, so you want a hint, let's say that if the last part is not controlled by the program but directly sent to the server, we can suppose that the server is only gonna focus on this part of the activation code. And since you can't know what the server is doing, yes, you should code a bruteforce. But it can be a little challenging to bruteforce something when the returned value is dynamic ;)
Guetta Author 20. Jun 2012	Excellent analysis of all the concepts inside HMX0101, good job mate !
lovejoy226 21. Jun 2012	It's reaally hard, but I appreciate your submission. so I could see the solution. hmx0101. Thanks.
Guetta Author 28. Jul 2012	Nice work on this redoC, thanks for your solution.
redoC 17. Dec 2012	just little note: my keygen uses GetSystemTime()+2 for hour computing which sometimes not corresponds to the server time... so it should be altered additionally

Guetta's keygenme#3

Download REMkeygenme.zip, 346 kb (password: crackmes.de)
Browse contents of REMkeygenme.zip

Hello everybody,
another keygenme, but a special one, some crypto this time :)

This keygenme has been coded by skiller and me,
in order to make a stuff of quality.

I've coded crypto and design part, and skiller had coded the driver part.

The goal is to make a keygen.

Don't forget that "gsdrv.sys" must be in the same directory as the keygenme.

Good luck.
Guetta.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 11. Dec, 2006
Downloads: 757

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Solutions

Solution by Ox87k, published 13. dec, 2006; download (300 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 11. Dec 2006	mmm... no any doubts, really good work but i have a problem. After some tests i got this error: Can't register driver. So, how can i resolve it? Thanks!
Crosys 11. Dec 2006	Getting same message to.
Guetta Author 11. Dec 2006	Hmmm, it's strange cause i think that this bug was fixed, there was two reason possible, maybe you've forget to put "gsdrv.sys" in the same directory as the keygenme, and if it's not this error, check in your registry "gsdrv" keys, delete its, and restart computer. Really sorry about this bug. Regards, Guetta.
Ox87k 11. Dec 2006	i've alwyas the sys in keygenme's folder. Btw, i cannot delete some keys from registry. Maybe, i think, with a reboot, i solve this error. Thanks for the info, i'm going to try before it's possible..
Guetta Author 11. Dec 2006	Tell me about the results when you've rebooted, it makes me crazy coz i've tested the .exe on several computer and it always work immediatly or after the clean of the registry/reboot. Sorry, Guetta.
Crosys 12. Dec 2006	Ok, solved, gonna write tutorial soon.
Ox87k 12. Dec 2006	yeahhhhhh! I reboot and now it works perfectly. I solved it too! Good job, really!!!!
Guetta Author 12. Dec 2006	Well, I'm really hapy to see that it works :) Thx u 0x87k, and thx to x15or for his full working keygen.

Guetta's Keyme#5

Download keyme#5.zip, 203 kb (password: crackmes.de)
Browse contents of keyme#5.zip

Hello everybody :)

After my christmas keygenme, some people said me that the next one have to be harder, so here is my Keyme#5 ; )

Hope that you'll like it !

Solution == Keygen and little tut.

Regards,
Guetta.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 18. Jan, 2007
Downloads: 1561

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by Ox87k, published 31. jan, 2007; download (301 kb), password: crackmes.de or browse.

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Discussion and comments

YoseMite 21. Jan 2007	Waaw... Cool interface! Good job!
Guetta Author 24. Jan 2007	Thanks YoseMite ! I'm waiting for solutions =)
Crosys 26. Jan 2007	You have my keygen, you really want a tut :p?
Guetta Author 26. Jan 2007	Hehe, your keygen is good Crosys, anyway no solution here for the moment, so if you have some time... ; )
Ox87k 28. Jan 2007	the solution is coming... XD
Guetta Author 31. Jan 2007	Thanks 0x87k ! Verry good tute ! See you for the next one ; )

Guetta's NightMare KeygenMe

Download nightmare.zip, 413 kb (password: crackmes.de)
Browse contents of nightmare.zip

Hello people =)

A little keygenme to play with, not really hard, you can do it, for sure ; )

Have fun,
Guetta

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 07. Sep, 2007
Downloads: 821

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Solutions

Solution by TiGa, published 09. sep, 2007; download (43 kb), password: crackmes.de or browse.

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Solution by Crosys, published 08. sep, 2007; download (106 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 09. Sep 2007	Wow Crosys, too fast! Btw good solution! ;)
HMX0101 09. Sep 2007	Hehe, i've solved some hours ago... and i've planned to write a solution, but i see its not necessary anymore ;) Good job crosys, as 0x87k said good solution ;)
TiGa 09. Sep 2007	I'm going to continue writing my solution anyway. I'd like to be able to auto-validate my solutions instantly too ;)
red477 09. Sep 2007	Crosys,so fast. and solution is tidy and clean. nice:D
Guetta Author 09. Sep 2007	Really good work bro, i like keygen and tute. Anyway you'll find the next one harder, i promise ; )
Crosys 09. Sep 2007	thanks :)
Guetta Author 09. Sep 2007	And thx to TiGa for his good solution using his brain to reverse CRC instead of bruteforcing =)

Guetta's R-KeyGenMe

Download R-KeygenMe.zip, 25 kb (password: crackmes.de)
Browse contents of R-KeygenMe.zip

Hello everybody, a little keygenme in asm :

Stuff: anti-xxx, layers...
Protection: U will see by yourself ;-)

Solution : Keygen & little solution.

Good luck,
Guetta.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 07. Dec, 2006
Downloads: 786

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by crack, published 16. dec, 2006; download (14 kb), password: crackmes.de or browse.

crack has rated this crackme as quite nice.

Send a message to +gul »

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Discussion and comments

haggar 08. Dec 2006	Nice trick against Olly. Original.
Guetta Author 08. Dec 2006	Thx haggar ! It's really difficult to innovate in tricks :)
Savage 09. Dec 2006	i liked it too much :) nice idea
Ox87k 09. Dec 2006	yeah! Very good work with this trick anti-olly. Nice to see someone who try to use new tricks :)
hardcoder 09. Dec 2006	Yeah, nice to know it
Guetta Author 09. Dec 2006	Thank you guys, and thx to l0calh0st who send me a full working keygen :)

+gul's gulcrackme #1

Download gulcrkme1.zip, 27 kb (password: crackmes.de)
Browse contents of gulcrkme1.zip

A little exe that needs to be patched. Not really trivial, but far from being hard. ;) When you have cracked it, it will reveal its secret to you."

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 11. Jun, 2005
Downloads: 757

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Solutions

Solution by DLAP, published 13. jun, 2005; download (27 kb), password: crackmes.de or browse.

DLAP has rated this crackme as nothing special.

Solution by XPiS, published 13. jun, 2005; download (4 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

DLAP 11. Jun 2005	I aslo done it, but a did another way, and i wrote a solution.
haggar 11. Jun 2005	God damn, this column is for comments and tips! Don't post solutions here! I lost my interest now when I heard what's secret.
CuTedEvil 11. Jun 2005	XPiS ! DO NOT POST SOLUTIONS HERE! this is a discussion & comments column, not for solutions! if you have a solution submit it, else plz don't do this again!
XPiS 13. Jun 2005	Sorry people, that was really stupid from my side. Well, as for me the crackme is rather easy but interesting... DLAP, are you from Russia?
DLAP 13. Jun 2005	No, i'm from Latvia. Why are you asking? Why do you thought that i were from Russia?
XPiS 14. Jun 2005	I thought so because of the mail.ru e-mail...
modchip 15. Jun 2005	That was rather interesting... :)

gulhadore's patchme #1

Download gulhadore_patchme1.zip, 871 b (password: crackmes.de)
Browse contents of gulhadore_patchme1.zip

patchme

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Feb, 2002
Downloads: 2234

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Solutions

Solution by CuTedEvil, published 18. feb, 2002; download (1 kb), password: crackmes.de or browse.

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Send a message to hackereha »

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tamaroth Moderator 20. Oct 2010	For some reason crackme crashes every time i try to run it, tried to run it on w7, xp with .net 4.0 installed, crashes always. But anyway, keygen is done by static analysis: tamaroth ~fO<Kd0@800T1~dk should work :>
H2SO4 Author 20. Oct 2010	@tamaroth: Indeed! It works, Good job! Strange about the crashing program. Can you write a tutorial. I'm unable to crack it: the .NET Framework hides all my constants, strings, ...
TripleTordo 28. Dec 2010	crackme crashes every time for me too
ZaZa 15. Jun 2012	I also encountered an error: overflow of an arithmetic operation. This was associated with the following line: Dim num7 As Integer = (((num3 * num5) Mod & H6A) + num4). num5 is SByte, as num3 ... When multiplying, the type of temporary defines an intermediate variable as SByte, that can not get into the border ... Therefore, a mistake! To resolve this error, change the line to: Dim num7 As Integer = (((Cint (num3) * Cint (num5)) Mod & H6A) + num4)

hackereha's Crackme by hackereh@!

Download hackereha.zip, 33 kb (password: crackmes.de)
Browse contents of hackereha.zip

Hey every1 it's my first crackme and it's for newbies.It's some kind of hardcoded btw i'm a newbie in asm too if u find some errors in this pro please let me know it good luck:)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 09. Aug, 2008
Downloads: 1531

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by mjones, published 03. sep, 2009; download (8 kb), password: crackmes.de or browse.

mjones has rated this crackme as quite nice.

Solution by br0ken, published 13. aug, 2008; download (3 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

DjPaul 10. Aug 2008	Indeed a very easy crackme, but nice job hackereha for your first try! A question I have, is why you check for the shift keycode on ':' character? there is no need for that An idea of hardening the things a bit is to use the previous character as a xor'ed key to the next one. This way, the password can't be viewed in the source code.
hackereha Author 10. Aug 2008	Lol it was just for fun:P and i didn't wanna get harder things for newbies:) but what do you mean by " the password can't be viewed in the source code" i didn't get it. Is it shown in the source code:S??
DjPaul 11. Aug 2008	No no, but a xor would hide more than a simple not, that's what I meant ;)
Goth 14. Aug 2008	This was the first crackme I've solved by myself. Thank you very much for it, I'll post my solution. :)
Goth 14. Aug 2008	Mh, I've changed of mind, br0ken's solution is very detailed. Mine not so. XD
geal 01. Sep 2008	Thanks for this, that was my first crackme! You should ask for a keygen :P
Xspider 02. Sep 2008	he did another one wich he asks for a keygen :)
izlesa 07. Dec 2008	It was fun. I think it is necessary to me to make tables of logic operations and put it on my head ^_____^' sry for bad english ...
ringzro 04. Sep 2009	Pretty straightforward, but this one has more than a single possible solution. More than one character passes each of the checks; some of this chars are not typable(they are not on the keyboard), but...
conoyes 11. Sep 2009	good crackme. very easy, i've solved it too, and i'm a real newbie. thx
makaka 29. Feb 2012	Yeeeeah, it's cool crackme, i'm cracked it. Photo: http://s018.radikal.ru/i521/1202/ae/6a43a27db763.bmp
Icebeen 06. Nov 2012	I created a nice, big, in-depth tutorial and exploitation of this, and then I realized the solution submissions were closed. (T.Tt)
Icebeen 06. Nov 2012	*explaination. This was a pretty fun crackme, though!
sourcerer 11. Jul 2013	This site needs to make a comeback !
sourcerer 11. Jul 2013	Icebeen I want that tut haha

hackereha's Very easy keygenme from hackereh@!

Download My_KeygenMe.zip, 48 kb (password: crackmes.de)
Browse contents of My_KeygenMe.zip

Hi again:) again with u another mofo:P this time it's keygenme it is really simple and keygennable:P

Rules
1)No patching at all!
2)Since it's for newbies send a full solution and keygen!
3)Good luck maybe it will be ur first keygen:) (i hope so:))

regards hackereh@:)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 09. Aug, 2008
Downloads: 2058

Rating

Votes: 10
Crackme is boring.

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Solutions

Solution by [xorolc], published 13. aug, 2008; download (7 kb), password: crackmes.de or browse.

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Solution by br0ken, published 13. aug, 2008; download (18 kb), password: crackmes.de or browse.

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Solution by obnoxious, published 13. aug, 2008; download (7 kb), password: crackmes.de or browse.

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Solution by Xspider, published 13. aug, 2008; download (68 kb), password: crackmes.de or browse.

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Solution by pr2008, published 13. aug, 2008; download (141 kb), password: crackmes.de or browse.

pr2008 has rated this crackme as boring.

Solution by WarRock, published 13. aug, 2008; download (579 kb), password: crackmes.de or browse.

WarRock has rated this crackme as awesome.

The submission of solutions is closed.

Discussion and comments

WarRock 10. Aug 2008	Nice one mate good for ppl like me haha my keygen will come tomorrow just want fix a bug and write some over it ;)
WarRock 10. Aug 2008	@blender u can read or ? NO PATCHING! so my keygen and small tut is finished :)
WarRock 10. Aug 2008	hehe thats not so hard to keygen :)
blender 10. Aug 2008	I'm a newbie, so ....i can't creat the keygen now! but i'm specialised in patching! ALL PROG..not keygen them. How did you find the tutorial?
WarRock 10. Aug 2008	Im noobie in keygenning too hehe i wrote a tutorial snd submit my solution soon they will upp it here :)
anewbies 10. Aug 2008	is self keygenning allowed? is abit of patching ;)
WarRock 10. Aug 2008	Nope, No patching at all! and no Self-Keygenning.
blender 10. Aug 2008	So I'll make the program auto serial giving g_g, i know, ... o_O
blender 10. Aug 2008	PLS if you know how to make this kind of keygen, send us a video tutorial ! for all good members: THX
hackereha Author 10. Aug 2008	ahh i actually forgot it to write SELF-KEYGENING ISN'T ALLOWED!! basically if u cant patch it ,u cant self-keygen it too lol^^ and thx for ur interests:P And please submit ur solutions for very newbies:P and submit them on this site not rapidshare or sth else!
Xspider 10. Aug 2008	nice kgnme i will write a keygen :D wait for me :p btw nice music too :)
xylitol 10. Aug 2008	blender, anewbies go to read FAQ...
WarRock 10. Aug 2008	serialsniffer is that ok ? but this is not really hard one with some knowhow it can be done.
blender 11. Aug 2008	@ Xyilot, quel est le problème, je ne comprends pas ton post
WarRock 11. Aug 2008	@WarRock: nope only keygen is acceptable ;) i think that too, i must write better tut :S lol :D
Xspider 11. Aug 2008	hehe is not so hard atleast not for a newbie like me :p
xylitol 11. Aug 2008	blender: So I'll make the program auto serial giving g_g, i know, ... o_O ça c'est du selfgen si tu read la FAQ tu peut look that: "The author of a crackme asked for NO PATCHING in big capital letters, can I submit a patching solution anyway? No. Even turning the crackme into a self-keygen or a self-bruteforcer is considered as patching. The best solution is always making a keygen because it shows that you fully understand how the crackme works." et que dit monsieur hackereha "Rules 1)No patching at all!" donc voilà :]
obnoxious 12. Aug 2008	nebody needs keygening help on this????
WarRock 12. Aug 2008	maybe blender :D
blender 12. Aug 2008	WarRock > Sorry man, confused :$
obnoxious 12. Aug 2008	Well just wait.....it will be here soon :P
blender 12. Aug 2008	Why comments are moderated here? uh?
TiGa 12. Aug 2008	Because new members often start behaving like little children. This is not the place to start calling each other names. We even used to delete bragging comments too.
MulleDK13 12. Aug 2008	What does DEADC0DE mean?
br0ken 12. Aug 2008	DEADC0DE is a hexadecimal number normally represented as 0xDEADC0DE. It's decimal equivalent is 3735929054.
Xspider 12. Aug 2008	yeah :p @WarRock: [where is your keygen then ? hahah] it's not approved yet but hope so :D
MulleDK13 12. Aug 2008	Oh, ya... I didn't think as far as it was a HEX number.. Just that it was a string xD Thanks.
Xspider 12. Aug 2008	no it is hex cuz the author used just DEAC so they are chars of hex (ABCDEF) and we can't use others strings like GHIJKLM... u understand what i mean ;) :p
Xspider 12. Aug 2008	@WarRock: i know you was the 1st :) but this is not a problem cuz we are all the same here ;)
Xspider 13. Aug 2008	0_o are u always fixing your err0r or what :p
WarRock 13. Aug 2008	no, next day it was fixed always wait for uploade from mod :S he delet my link with keygen lol.
TiGa 13. Aug 2008	Who said it was a race? We always wait a few days before starting to approve solutions.
WarRock 13. Aug 2008	:) so is it yeah.
IMPosTOR 13. Aug 2008	lol race :D i make my keygen, not bad but easy.
Goth 14. Aug 2008	This was my first KeygenMe. Thanks for it! :)
IMPosTOR 14. Aug 2008	to moderators: br0ken keygen Enter your name (1 <= name length <= 24) = impostor_76171 . #@! Serial = 3062515279 its not correct ;(
br0ken 14. Aug 2008	It's because I used scanf which has some limitations. Try entering a-z and/or A-Z and/or 0-9 without spaces. It works fine. Or if you're so concerned replace scanf with gets(name) in the keygen.cpp :P
IMPosTOR 14. Aug 2008	@br0ken anyway tnx
Xspider 14. Aug 2008	w0w a lot of solutions :p
ARCHANGEL 16. Aug 2008	It's very easy, and, as to me, it's time to say it loud: Reh@:)
Toxide 17. Sep 2008	I like it! Solved and wrote a keygen. This was actually my very first keygenme (new to reversing!). I hope you continue to make some more hehe.
ayeyen 18. Sep 2008	My first keygen! Took some help from a solution, but I understand now. The hardest part was trying to remember how to do C code ;P
terrak 27. Sep 2008	well its easy to find a key for a usr but i have no idea about the algorithm. lol wow i should really learn more asm
Coderess 30. Sep 2008	Its very simple :)
icebot 01. Oct 2008	nice keygenme :D good for beginners
izlesa 05. Dec 2008	tnx, nice and simple.
Rapido 23. Feb 2009	Open cme in Olly, you’ll be here: 00401000 >/$ 6A 00 PUSH 0 ; /pModule = NULL ----------------------------------------------------- 1-when i open with olly dont show this section.why? 2-how can you find this: GetDlgItemTextA?
madmaurice 15. Jul 2010	really easy. needed 1 hour to solve because i always dont realize that the values in olly are hex not dec xD
Stati 19. Apr 2012	Great keygenme for beginners, it's really easy to solve.
mausy131 22. Apr 2012	Very easy to solve! Great Job i learned from it (:
paihdeaiti 29. May 2012	I disassembled and debugged the exe with OllyDbg which worked well. I could write a keygen that produced imho exactly the right key, and according to OllyDbg that really was the case. Yet for some reason the WinAPI lstrcmpA call somehow fails to notice that they're the same. The only possible difference is that OllyDbg shows a reference to another of them (the one submitted in the form) as String2 => "xxxxxx" and the one calculated by the program is shown as String1 = "xxxxxx". May that difference between an equality sign and an obvious arrow explain? Can't believe it'd be a fault in Wine either. Anyway, as I noticed that it the problem -might- not be in my keygen, I got kinda p***ed and resorted to patching a copy of the executable file. The original exe is still intact though, perhaps I might be able to work on it tomorrow :P
pluxi 10. Jun 2012	Super easy. Did it in < 10 minutes, (would've beaten it sooner but you have the window constantly on top and I'm OCD on where to place it when debugging it in olly hahaha) but I'm still going to write a keygen right now.
DJ1hAD0 11. Jan 2013	Easy, but Great Crackme :)
themindhacker 22. Jun 2014	Appreciate this :D
d4rK_r3v3rs3R 12. Oct 2014	http://www.filedropper.com/showdownload.php/kgen1byd4rkr3v3rs3r newbie reversing and first time making a keygen! it may not generate properly but at least work x) this was a good practice for me, thanks hackereh@!
d4rK_r3v3rs3R 12. Oct 2014	Whoops! sorry!! this is the link for the keygen: http://www.filedropper.com/kgenbyd4rkr3v3rs3r I noticed something wrong with the other one! T_T!!
d4rK_r3v3rs3R 18. Oct 2014	Hey I just learned a bit of Python, I must say that is a very good Languague to manipulate hex.. here is another keygen: http://www.filedropper.com/kgen7 this time it can key generate everything I put (i guess x) ) not like the other one ~ sorry for spamming!
luxdav 30. Aug, 23:47	my keygen in c++: https://github.com/LuxXx/reverse-engineering/tree/master/hackereh%40
spookyghost 01. Sep, 12:15	Hello! Not sure if you still browse this website but here's my solution. http://pastebin.com/0Shzz4zR It's my first keygen and I feel like I've learned a lot from making this. Thank you!
NanoyMaster 20. Sep, 14:13	YEY first keygen ever written: http://pastebin.com/70WTSCmW ( and in PHP!!! )

HACKERGY's VB .Net crackme

Download net_crackme_1.zip, 4 kb (password: crackmes.de)
Browse contents of net_crackme_1.zip

password

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 01. Nov, 2002
Downloads: 1471

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Solutions

Send a message to HackeRMaN »

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Solutions

Solution by Kreet, published 29. mar, 2005; download (100 kb), password: crackmes.de or browse.

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Discussion and comments

Bauer Bimpf 29. Jul 2005	this keygenme is faulty and should be deleted or replaced with kreet's fixed version. (see kreet's solution.)

jjjjj 05. Nov 2010	This is just an empty template
Frighten426 08. Nov 2010	Couldn't find anything....

hacker_berefin's crackme1

Download CrackMe.zip, 5 kb (password: crackmes.de)
Browse contents of CrackMe.zip

this code my first crackme and very Easy For crack

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 30. May, 2006
Downloads: 741

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Solutions

Solution by Ank83, published 05. jun, 2006; download (38 kb), password: crackmes.de or browse.

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Discussion and comments

Ank83 31. May 2006	Hi One question. How do we know when we have the valid key. The third form pop ups ? The form with the text "You can crack Me. Best Regards Ank83
HMX0101 31. May 2006	I hate the VB apps, but specially the P-Codeds...
Ank83 31. May 2006	Only WKTVBDE can be of use here. I can fish a serial, but making a keygen I another thing. Regards Ank83
HMX0101 31. May 2006	You can use P32Dasm, this is a disassembler for native and pcode apps...

hacker_berefin's CrackMe#2

Download CrackMe.zip, 9 kb (password: crackmes.de)
Browse contents of CrackMe.zip

You Must Create KeyFile

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 21. Jul, 2006
Downloads: 466

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to hackholmes »

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Discussion and comments

hackholmes's KeygenMe #3

Download KeygenMe_#3.zip, 150 kb (password: crackmes.de)
Browse contents of KeygenMe_#3.zip

Solution Levels:
===========
EXCELLENT: create a working keygen for serial number and activation code.

PERFECT: create a working keygen for serial number
and use self-keygenning for activation code.

GOOD: Give a working serial number and use self-keygenning for activation code.

Good luck and happy!
hackholmes

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 13. Sep, 2015
Downloads: 383

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Solutions

Solution by acruel, published 23. sep, 2015; download (2 kb), password: crackmes.de or browse.

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Send a message to Hack_ThE_PaRaDiSe »

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Discussion and comments

segra 17. Sep 2015	Took me way longer than expected, but it was my first keygen :)
segra 17. Sep 2015	in saying that, it was a fun challenge, Thanks
tetman 17. Sep 2015	Got the general serial code and made a activation code gen program. I tried to make a serial gen, but seems my equation is not working although randomly generated code seems correct. ((double)(func(tmp, 0) - 351689844.0) / 209.0)*749.0 + 354911237.0
segra 17. Sep 2015	There is 2 halves to the serial (7 chars each), both start from the same random value. both values are multiplied, and added to. the values are both divided by 26, 7 times, and remainder of each operation is put into the serial. the final position of the serial, is the sum of every odd position across the entire serial
tetman 17. Sep 2015	Yes, based on the comment the above equation give the last half number which is 26mal number. I don't know where I'm stuck.
segra 17. Sep 2015	i've posted the code as a solution, but until its reviewed, if you want to cheat :) https://github.com/segrax/KeygenMe3
tamaroth Moderator 25. Sep 2015	tetman: not sure if I remember correctly, but find out about conversion between base-10/base-16 and base-26, this should give you a helping hand.

Hack_ThE_PaRaDiSe's FollowMe By H_T_P

Download FollowMe_By_H_T_P.zip, 564 kb (password: crackmes.de)
Browse contents of FollowMe_By_H_T_P.zip

FollowMe By H_T_P 12d/05m/2010
..........................

Welcome to my new challenge. It is not supposed to be difficult, however there is a trick
that may slow you down.

Your task is to write a keygen. The algo is very simple so once you understand what it is
going on you will manage to do it.

Enjoy,

H_T_P

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 16. May, 2010
Downloads: 407

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by BoRoV, published 19. may, 2010; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

ARCHANGEL 16. May 2010	Actually, I tried to find regcode checking routine, but my searching wasn't successfull. Interesting...
Xspider 16. May 2010	it's very obfuscated!
Hack_ThE_PaRaDiSe Author 16. May 2010	@Xspider could be worse... :D
BoRoV 17. May 2010	not very deobfuscated less than an hour
Hack_ThE_PaRaDiSe Author 17. May 2010	Borov I had to delete your latest post. In this way you destroy other people's fun with this challenge. So either you submit a complete solution, or please give them a break. It is not right neither for your, nor for them. Thank you.
ConJan 19. May 2010	BoRoV, try deobfuscate my crackme Jump Around. It's here for half a year and no solution even no comment :( I admit this is a little advertisment to my crackme :)
BoRoV 19. May 2010	@ConJan: I quickly looked up, not hard )
BoRoV 19. May 2010	@Hack_ThE_PaRaDiSe: I'm submit my solution )
Coderess 20. May 2010	Congrats BoRoV pindatyii solution ;)
Hack_ThE_PaRaDiSe Author 20. May 2010	Congratulations also from me. Thank you very much for the time you dedicated, and for the nice solution that will help the rest of the members.

Hack_ThE_PaRaDiSe's KeyMe#1 By H_T_P

Download KeyMe#1_By_H_T_P.zip, 285 kb (password: crackmes.de)
Browse contents of KeyMe#1_By_H_T_P.zip

A "keygenme" challenge based on a custom algo of mine...

Good luck!!!

Hack_ThE_PaRaDiSe

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 10. Nov, 2008
Downloads: 561

Rating

Votes: 5
Crackme is boring crap.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

mjesun 10. Nov 2008	Why is imported ExitWindowsEx? Why you call ExitWindowsEx(EWX_FORCE, 0)?
Hack_ThE_PaRaDiSe Author 10. Nov 2008	This is not important actually, it should only log you off in case you use a pc with more than one accounts. However, you should never arrive there, except if you patch the exe in order to get the "success message" which ofcorse is not what this challenge is about. Only keygens are accepted as valid solutions. Normally the exe should close after arriving there but since I had added that later in my source, I forgot to recompile... In any case you have to make a keygen so this is nothing you should worry about. In my next challenge this will be fixed.
Hack_ThE_PaRaDiSe Author 10. Nov 2008	Well I had originally chose "3" as difficulty level. They decided to set it as level 2. However, it's the obvious you should be afraid of.... ,or not?!? We will se if they were right.
mjesun 11. Nov 2008	I really disliked the ExitWindowsEx.. anyway, I'm working on it.. :D No remorse! :·)
Hack_ThE_PaRaDiSe Author 11. Nov 2008	Sorry dude, I hope it did not log you off while u were doing something important. Anyway, go for it!!!
vimm 19. May 2009	User: LUKI Key: 11575-5322-12457-4033-13649-9616-9355-7542 Good challenge for noob like me. I founf it very entertaining. I will upload KeyGen tomorrow.
Hack_ThE_PaRaDiSe Author 30. Jun 2009	I havent logged in for some time now, so I still have to check your answer. I don't see any keygen yet...
r-Evolution 09. Sep 2010	Hahah!!Like everything from Hack_ThE_PaRaDiSe extraordinary, perfect.I love the antidbg trick!!BYE BYE LAMER....:o) :P

Hack_ThE_PaRaDiSe's p0wnbox Cracking Challenge #3

Download p0wnbox_Cracking_Challenge_#3.zip, 490 kb (password: crackmes.de)
Browse contents of p0wnbox_Cracking_Challenge_#3.zip

The task is to make a valid crack for this challenge, no serial, no keygen are accepted since I kept it as simple as possible regarding the serial calculation algo just for demostration purposes.

Please read the "Readme.txt" file included.

Good luck,

H_T_P

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 09. Sep, 2009
Downloads: 701

Rating

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(we have only 1).

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Solutions

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Discussion and comments

deurus 09. Sep 2009	Another delphi file??? :)= Good Job! H_T_P
Hack_ThE_PaRaDiSe Author 10. Sep 2009	delphi file?!?!
DigitalAcid 11. Sep 2009	Lol yes, there seems to be some delphi in one of the files ;). I think i see what you did after taking a quick look at it. It might be the same as my idea of an unpackme i'll never release =).
Hack_ThE_PaRaDiSe Author 13. Sep 2009	:O) It should not be very hard once you understand what is going on....
DigitalAcid 13. Sep 2009	Well, i got an almost working file, but i'm missing 1 last thing and can't seem to find anything usefull. I get the input box, but the goodboy/badboy is still missing ;).
Hack_ThE_PaRaDiSe Author 13. Sep 2009	Im sure you are on the right way... :o)

Hack_ThE_PaRaDiSe's p0wnbox Cracking Challenge #4

Download p0wnbox_Cracking_Challenge_#4.zip, 474 kb (password: crackmes.de)
Browse contents of p0wnbox_Cracking_Challenge_#4.zip

Hello, guyz this is my new challenge for you all.

Your task is to find a valid serial for the name: pownboxforum

Finding the correct serial should not be difficult.

However, there are some anti-reversing tricks that may give you some trouble, that is why I rated "3", since for a couple of them luck cannot help...

You should send a detailed report about the anti-reversing tricks you dealed with and the way you bypassed them.

Just a valid serial will not be accepted!!!

Learn..and help the other to learn!

Enjoy,

H_T_P

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 21. Mar, 2010
Downloads: 767

Rating

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(we have only 2).

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Solutions

Solution by OmegaLock, published 28. mar, 2010; download (659 kb), password: crackmes.de or browse.

OmegaLock has not rated this crackme yet.

Solution by VESA, published 28. mar, 2010; download (81 kb), password: crackmes.de or browse.

VESA has rated this crackme as boring.

Solution by _sid, published 28. mar, 2010; download (21 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

TQN 22. Mar 2010	Nice antidebug trick with OutputDebugString. All other tricks can bypass with anti-antidbg plugins.
_sid 23. Mar 2010	upsss, after reading the rules: 1100011111000100000001001 ;)
Anicona 24. Mar 2010	Why do ppl always post serials? Unless an anti-spoiler-system is implemented, stop doing this ... write a tutorial and submit it...
VESA 24. Mar 2010	Keygen: http://www.multiupload.com/EZQJNN868V Anti-Debug Patch Table: RAW Offset \| Old Byte \| New Byte -----------------+----------+---------- 00000E7C 55 C3
Hack_ThE_PaRaDiSe Author 25. Mar 2010	Dear Anicona you are right but unfortunately it seems that nobody reads the instructions/rules...
_sid 26. Mar 2010	Yes, perhaps it was not the best solution, to put the serial here (even though i don't agree with you) still, single serial is not the solution. I listed out neither the antidebug used in the cm nor the algorithm. Even the serial is coded binary, so you have to check it on your own. The problem is - why you read the comments BEFORE you actually solve the challenge ?
VESA 26. Mar 2010	I published a tutorial ;)
Hack_ThE_PaRaDiSe Author 29. Mar 2010	Many thanx to all the people that dedicated some time on this challenge. I know that some of you may think that it is over-rated in terms of difficulty, however I take as consideration always the beginners and believe me, a beginner would not have done anything of what you did in order to bypass the anti-reversing stuff. In any case I hope you enjoyed it. H_T_P
andrewl.us Moderator 29. Mar 2010	(OmegaLock's comments removed at his request)
OmegaLock 29. Mar 2010	many thanx andrewl.us :)

Solution by _pusher_, published 07. aug, 2004; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

hacnho's VCT Crackmes#5

Download VCT_Crackme5.zip, 299 kb (password: crackmes.de)
Browse contents of VCT_Crackme5.zip

The task is very easy!

1. Unpack this crackme, very easy...
2. Enable the button check.
3. Analyze the algo.
4. Make a keygen.
5. Send to me tut in html (will be public in our site)+keygen, src.

When you crack success this crackme, if you want join to our team! You are welcome.

Unpack+Analyze algo+make keygen= You are a very good unpacker and cracker and coder ;-).

Regards

hacnho (lenguyenkhang@gmail.com)
Viet Cracking Team 2k4 at http://tothesky.us

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 20. Oct, 2004
Downloads: 2074

Rating

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Solutions

Solution by bLaCk-eye, published 27. oct, 2004; download (15 kb), password: crackmes.de or browse.

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Send a message to hadi.delphi »

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Discussion and comments

hadi.delphi's First Iranian Virtual Machine

Download Last_EXE.zip, 2409 kb (password: crackmes.de)
Browse contents of Last_EXE.zip

i want crack this crack me or dump "This is my protected application"
Thanks

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 01. Apr, 2009
Downloads: 1678

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by exevf, published 05. feb, 2009; download (225 kb), password: crackmes.de or browse.

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Discussion and comments

T.0.R.N.A.D.0. 01. Apr 2009	CME published on 01. Apr,2009 Solution published on 05. Feb,2009 ?!?!?!?
zairon Moderator 01. Apr 2009	It was temporarily suspended.

hadi.delphi's HD VM 2.1

Download HD_VM_2.1.zip, 1256 kb (password: crackmes.de)
Browse contents of HD_VM_2.1.zip

hi to everybody
in this crackme , cracker must detach child App from father App
and repair all child app's opcode
thanks

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 17. Sep, 2009
Downloads: 713

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Solutions

Solution by simonzack, published 24. nov, 2009; download (647 kb), password: crackmes.de or browse.

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Discussion and comments

_pusher_ 17. Dec 2009	wow you didt even get a thank you simonzack, how rude :)

hadi.delphi's Turbo 3D Debuger Detection

Download T5DZ.zip, 499 kb (password: crackmes.de)
Browse contents of T5DZ.zip

hi to all
I want deface Debuger Detection in this crack me
I want my Application every time show " NO Debuger"
thanks

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 02. Nov, 2008
Downloads: 951

Rating

Votes: 4
Crackme is quite nice.

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Solutions

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hadi.delphi's Virtual Nano jumper

Download EXE.zip, 426 kb (password: crackmes.de)
Browse contents of EXE.zip

please detach debugee from debuger application
thanks

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 29. Nov, 2008
Downloads: 486

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by exevf, published 30. jan, 2009; download (505 kb), password: crackmes.de or browse.

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Solution by mjesun, published 02. dec, 2008; download (934 kb), password: crackmes.de or browse.

mjesun has rated this crackme as awesome.

Send a message to haggar »

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Discussion and comments

mjesun 30. Nov 2008	Very good crackme! Anyway, I think that its defficulty is harder than 3, don't you think? This DebugActiveProcess with ContinueDebugEvent... I don't know =)
Benladan 03. Dec 2008	Good job. It's Very nice Solution. --- ;)
mjesun 03. Dec 2008	thanks.. =) anyway, the way to patch the JMP's is veeeery poor :D, but, it runs...
hadi.delphi Author 04. Dec 2008	very good thank you mjesun
mjesun 05. Dec 2008	Oops, I read again my comment.. When I talk about "the way to patch the JMP's" I refer to what is doing MY program (the VB code), not what it do the hadi.delphi's crackme. In addition, I think that this could be a great way to make a crackme... I'm thinking on it ;)
Benladan 08. Dec 2008	Thank you very much ;)

haggar's clone

Download clone.zip, 2 kb (password: crackmes.de)
Browse contents of clone.zip

==================
clone keygenme by haggar
==================

This is simple but (I hope) not dumb keygenme for begginers. Algo is in asm, very clear (if you remove junk in second part) and easy to understand.

Find more info in readme.rtf inside.

Tested only on XP Pro SP1. Good luck.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 08. Feb, 2006
Downloads: 1624

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by SKiLLa, published 18. apr, 2006; download (231 kb), password: crackmes.de or browse.

SKiLLa has rated this crackme as quite nice.

Solution by cyclops, published 15. feb, 2006; download (3 kb), password: crackmes.de or browse.

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Solution by Ox87k, published 09. feb, 2006; download (62 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 08. Feb 2006	absolutely great work haggar but... the algo is very long!!! I try to make a keygen but in asm ;) g0od j0b!
haggar Author 08. Feb 2006	Well , I tought that it's level 2 crackme but moderators change it to 1. This is second version, first was packed (and rejected due to that) and I throved some obfuscation in it, but after uploading new version I removed obfuscation and packer.
Ox87k 08. Feb 2006	i'm waiting for the ur next crackme ;) thanks for this...
ManSun 08. Feb 2006	Ekhm... very simple, clear and bored crackmes. Cracked in 5 minutes
l0calh0st 09. Feb 2006	some hint plz :(
Ox87k 09. Feb 2006	hints where? =)
l0calh0st 09. Feb 2006	abt where serial is generated....
RooJ 10. Feb 2006	l0calh0st, my origional breakpoint was at 004011E7, the call to GetDlgItemTextA. Im a newbie to keygenning but ive suprisingly managed to follow this through without a problem... the only thing im unsure on is exactly how shl works. How come 'shl ebx, 04' only seems to shift once to the left, and not 4 times :\.
haggar Author 11. Feb 2006	Ox87k, nice solution ;)
Ox87k 11. Feb 2006	thank u!!! great crackme ;)
SKiLLa 18. Apr 2006	I wrote a tutorial for the packed version of the KeyGen, and I especially liked the obfuscation part; it looks hard but is pretty harmless; nice !

haggar's KeyMe1

Download KeyMe1.zip, 2 kb (password: crackmes.de)
Browse contents of KeyMe1.zip

Hi folks!

This lame crackme is for totally newbie's , but beware of very simple but very annoying anti-Olly trick(s).

Do not run this crackme if you are surfing the net, or you have important documents opened. Close all and then try to solve this crackme. I stole trick from one protector. I threw some junk code inside just that it is not so obvious.

Your primary task is to find valid serial. It's simple but it needs to be bruted. No, it's not crypto (far away from that) and serial consist only from numbers and .... you'll see.

So find serial and explain anti-stuff. Good luck :)

PS

Tested only on Windows XP SP1.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 09. Apr, 2006
Downloads: 803

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by l0calh0st, published 10. apr, 2006; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

l0calh0st 09. Apr 2006	Very nasty Trick of exiting windows :P Thanks :)
justinf 10. Apr 2006	sadly thats just too much thinking for me, to brute the key- although I see how, I just really don't want to think that much ;] a+bb+cc+dd+ee Is there an easier way than I was thinking? taking the last value, dividing by 0x30-0x39 for each of the values until one of them makes it back 5 and equals 0?
TQN 10. Apr 2006	FindWindow with "OLLYDBG" class name string, IsDebuggerPresent, rdtsc trick. My Windows and OllyDbg not exit.
haggar Author 10. Apr 2006	l0calh0st, nice work. And quick too ;) Keygen was nice bonus. See you!
Zaphod 10. Apr 2006	l0calh0st writes in his tutorial: "Just press Ctrl+Alt+Del and then Esc and now everything seems to be fine..." Well, yes - but why? How did haggar make the computer apparently freeze? And what is BlockInput? This function is not mentioned in my win32.hlp...
l0calh0st 10. Apr 2006	Sorry i didn't mentioned that........Well the BlockInput blocks the keyboard and Mouse input...Only Ctrl+Alt+Del can unblock it in Windows Xp
justinf 11. Apr 2006	just hit 'space' in olly and change the call eax to nop's and blockinput is no longer an issue. Additionally, just set eax to 0 after IsDebuggerPresent() and the FindWindow() stuff. I never got it go quick enough between rdtsc's to be < 100, best I got was like 1000, so I just patch the jump to hand control one byte forward.
haggar Author 11. Apr 2006	Zaphod Enter in Google BlockInput and first link will give you API explanation. That RDTSC trick was crapp :) Just waste of couple bytes but I tought than some newbie maybe newer sow that opcode before.
Ox87k 11. Apr 2006	i don't know the trick RDTSC... haggar, can u give me more info about this? Thanks!
haggar Author 11. Apr 2006	RDTSC , ReaD Time Stamp Counter, is some timer value based on cpu cycles. Use google and you'll find more info. Basicly, it gives to EAX:EDX some timer value, I store it to stack , then little later I take another value. I subtract them and compare result. If result is big, that mean lot of time passed betwen those checks. In another words, somebody is debuging my code ;) It is common thing in todays protectors (SDProtector, SVKP, ...).
Zaphod 11. Apr 2006	Thanks, haggar. I had never heard of BlockInput or RDTSC before. Nice to learn new tricks...
Ox87k 11. Apr 2006	yeah, very nice trick (rdtsc)... thanks for description haggar ;)

haggar's KeyMe2

Download KeyMe2.zip, 4 kb (password: crackmes.de)
Browse contents of KeyMe2.zip

Hi and welcome to new crackme!

1. Your primary objective is to create generic keygen. It should be very easy. And no junk code this time.
2. Secondary goal is to describe anti-stuff. It is also easy and nothing new, so that won't be problem too.
3. And for the end, write solution to help others who don't have such skills as you :)

Greetings goes to everybody on this great site. Special greetings goes to l0calh0st for solving (and writing nice solution) my first KeyMe1.

Regards, haggar ;)

PS
Sorry for shitty coding and possible bugs, I tried my best. If you have any suggestions , please give your comment.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 11. Apr, 2006
Downloads: 830

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by indomit, published 20. apr, 2006; download (169 kb), password: crackmes.de or browse.

indomit has rated this crackme as awesome.

Solution by Ox87k, published 18. apr, 2006; download (46 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 11. Apr 2006	very very g00d crackme! The checks are easy, i solve it.. if i find many time, i'll write a little tute, however another thanks!
HMX0101 11. Apr 2006	i can't understand the string format...
HMX0101 11. Apr 2006	OK, thank you it help me too much :)
l0calh0st 11. Apr 2006	Another nice crackme from haggar...i was buzy writing my own crackme......See ya.......:)
haggar Author 11. Apr 2006	I removed comment with serial. Please, don't give it like that because somebody else would maybe like to find solution by self. Yep, it easy. I wrote it more for my practice. Next crackme will have more serious algo, but that will wait for some time.
toshimi 12. Apr 2006	generic Keygen...!ohhh..:).
indomit 14. Apr 2006	Somebody!!! Change name <SCRiPT> to another... His name damages content of all pages on this server, And I cannon upload the solution of this crackme... And I cannot ansver to Disscussion... I take big trouble to do it...
fabsys 16. Apr 2006	nice keygenMe :) I try to write a small tutorial soon
indomit 17. Apr 2006	Oh! Thank you, whoever he may be %) I upload solution. It was my first crackme which I try to crack, and I do it! :) And I can to create the keygen! It was so great! :)

haggar's KeyMe no.4

Download keyme4.zip, 30 kb (password: crackmes.de)
Browse contents of keyme4.zip

~~~~~~~~~~~~~~~~~~~~~~
KeyMe no.4 by HAGGAR
~~~~~~~~~~~~~~~~~~~~~~

This keyme came up after reversing some games CD-key checks so you can take it as some practice. Your task is to create generic keygen. It is very easy, but hey, this kind of checks usualy are (from my experience).

Greets goes to all good people on crackmes.de, BIW reversing, ARTEAM, SnD and FHCF. Special gretings is for folks who solved my previous crackmes.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 28. Apr, 2006
Downloads: 1020

Rating

Waiting for at least 3 votes
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Solutions

Solution by AntiPro, published 24. may, 2006; download (56 kb), password: crackmes.de or browse.

AntiPro has rated this crackme as boring.

Send a message to haiklr »

View profile of haiklr »

Discussion and comments

outtie 28. Apr 2006	For anyone that has motivation to reverse all the algos. Address Disassembly Comment 00401476 cmp byte ptr [403754], 30 validate input 0-9 A-Z 004014F7 cmp al, byte ptr [ecx+4030FF] algo 1 00401571 lea eax, dword ptr [403714] algo 2 00401688 lea eax, dword ptr [403755] algo 3 00401765 xor ecx, ecx algo 4 0040185B lea eax, dword ptr [403755] algo 5 00401933 xor ecx, ecx algo 6 0040196B lea eax, dword ptr [403714] algo 7 00401A1A xor eax, eax verify algo output
[:.NaLe!T.:] 28. Apr 2006	Is it just me or does this algo realy looks like the one in EAGames (NFS:MW eg)? Similar to EA, generated key leaves third and fifth part of key without changing them. 172J-22L2-NALE-2NAL-NALE Thanx to it, every DEViANCE keygen generates key that ends with xDEV where 'x' is custom char!
AntiPro 20. May 2006	I've "reversed" this algo with ease. There seems to be a whole decoy part in it where it calculates a CRC32 (amongst other things) but simply doesn't use the resulting value.
Shism 28. May 2006	antipro.. Why do you have anti-debugging in your keygen lol?
AntiPro 29. May 2006	Ehm, I don't know what you're talking about to be honest. Unless you mean the fact that it's a console application. Just search for strings and you're at the generation code quick.
AntiPro 29. May 2006	00401220 is the generateRegistration() function.
Shism 29. May 2006	Well your keygen has isdebuggerpresent and setunhandled excpetion filter....
Shism 29. May 2006	Oh The routine never gets called

haiklr's Babylon Keygenme

Download babylon-kgme.zip, 2 kb (password: crackmes.de)
Browse contents of babylon-kgme.zip

Hi !

An easy french keygenme ! Even it's relatively simple, I hope that it spends a little piece of your time ! Obviously, the goal isn't to get a valid serial corresponding to your name, but to understand the algo and to code a keygen :]

Type : Keygenme
Level : Newbie
Language : C
Packed : No

Once you solved it should be great to write a little tutorial.

Good luck !

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 06. Jul, 2006
Downloads: 1489

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by El_PuPaZzArO, published 09. jul, 2006; download (6 kb), password: crackmes.de or browse.

El_PuPaZzArO has rated this crackme as nothing special.

Solution by indomit, published 19. apr, 2006; download (6 kb), password: crackmes.de or browse.

indomit has rated this crackme as boring.

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Discussion and comments

znycuk 06. Jul 2006	lol Keygenme published 06 Jul 2006 Solution: 19 Apr. 2006 You really rocks indomit ;)
red477 06. Jul 2006	But why should this happen?
indomit 09. Jul 2006	Hm... Cool %) It's old crackme, but probably it was rejected, and then published again... %)
predador 27. Jul 2006	Just one nop for solve this!
EvOlUtIoN 31. Jul 2006	No predator...goal is to dreate a keygen so you have to undertand algo not patching
Sinok 21. Mar 2008	OMG the serial is so long and weird, nice algo tho.
Noteworthy 09. Aug 2013	Keygenning done, thanks haiklr for writting it.

haiklr's Baby Crackme #1

Download Baby_Crackme_#1.zip, 92 kb (password: crackmes.de)
Browse contents of Baby_Crackme_#1.zip

Baby Crackme #1

A new little crackme ! Don't bruteforce, just use your brain, it's an easy one :]

Have fun !

haiklr

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 18. Apr, 2009
Downloads: 601

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by T.0.R.N.A.D.0., published 23. apr, 2009; download (5 kb), password: crackmes.de or browse.

T.0.R.N.A.D.0. has rated this crackme as quite nice.

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Discussion and comments

Ox87k 19. Apr 2009	Very nice and little one man! =)
T.0.R.N.A.D.0. 19. Apr 2009	Solved it ! ripemd ( KEY ) = f7f0498f9f7c8d7caeaf08cacf093579 ; ) Nice CrackMe indeed :)
indomit 20. Apr 2009	Confirm the key, found by T.0.R.N.A.D.0. md5(key) = dbc78b5ec2ac0dcc5f59a5e10c415c8a ;)
haiklr Author 21. Apr 2009	Thx indomit > ok, good key :] T.0.R.N.A.D.0. > is it the md5 hash ?
T.0.R.N.A.D.0. 21. Apr 2009	NO, the hash i gave is the RIPEMD128 hash. MD5 is dbc78b5ec2ac0dcc5f59a5e10c415c8a (same as indomit)
T.0.R.N.A.D.0. 22. Apr 2009	@ GioTin : y don't u post your sol here ??
Ox87k 22. Apr 2009	@GioTiN: WTF? Do you call this one "a solution"? Force a conditional jump to jmp? This one isn't the solution haiklr wants.
T.0.R.N.A.D.0. 22. Apr 2009	So, that's the reason, GioTin didn't post his solution here :P
cyclops Moderator 22. Apr 2009	@GioTiN: Please read the rules. Comment deleted!
Arborius 23. Apr 2009	I feel that this crackme was akin to picking the lock of a door off its hinges. Have you haiklr a crackme that is closer to what one might find in the wild?
Noteworthy 10. Aug 2013	Key found, thanks haiklr.

haiklr's Baby Crackme #2

Download Baby_Crackme_#2.zip, 65 kb (password: crackmes.de)
Browse contents of Baby_Crackme_#2.zip

Baby Crackme #2

After the Baby Crackme #1, let's go with the second !
Don't bruteforce, just use your brain, it's an easy one too :]

Have fun !

haiklr

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 18. Apr, 2009
Downloads: 433

Rating

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Solutions

Solution by T.0.R.N.A.D.0., published 24. apr, 2009; download (11 kb), password: crackmes.de or browse.

T.0.R.N.A.D.0. has rated this crackme as quite nice.

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Discussion and comments

T.0.R.N.A.D.0. 20. Apr 2009	Solved it ! Multiple solutions exist. I am making a keyfile maker. Will generate solution today. Nice one, as usual. :)
T.0.R.N.A.D.0. 20. Apr 2009	Uploaded solution. Printing 0x0A without 0x0D took some time.
indomit 21. Apr 2009	nice crackme, but I think it's easier than first :) It has only 4 checks :)
T.0.R.N.A.D.0. 21. Apr 2009	Yes, i also felt so !
dotatoad 01. Jun 2009	yay dats my second crackme solved thx for uploading dude!!!!

haiklr's Gloops Crackme

Download gloops-crkme.zip, 2 kb (password: crackmes.de)
Browse contents of gloops-crkme.zip

--] Gloops CRACKME [--

A little keyfileme ! It's relatively easy, but BRUTEFORCING is forbidden (maybe think about perfect numbers....)
Just use your brain, a pen and a paper, it's only logical :]

Enjoy :]

haiklr

http://haiklr.new.fr

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 13. Apr, 2009
Downloads: 374

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by indomit, published 18. apr, 2009; download (5 kb), password: crackmes.de or browse.

indomit has rated this crackme as nothing special.

Solution by T.0.R.N.A.D.0., published 18. apr, 2009; download (18 kb), password: crackmes.de or browse.

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Discussion and comments

T.0.R.N.A.D.0. 13. Apr 2009	Very nice CrackMe. :) Awesome !! Solution will be uploaded soon. Hint for those who are still trying :: It didn't occur to me that the key-file may contain NON-PRINTABLE chars as i was trying to make one with notepad. So, think about the NON-PRINTABLE too !! Thanx @author for this nice crackme ( @ only 4 Kb ) !!
T.0.R.N.A.D.0. 13. Apr 2009	Solution uploaded.
indomit 14. Apr 2009	found key-file. it's md5 is 6dce8a46540ecb5b0080e755704de4fa :)
obnoxious 14. Apr 2009	rule bending by indomit :D. what are the mod's gonna say:)
indomit 14. Apr 2009	Oops, I mean "its" md5 :) So, how you find the file if you know only hash of it? :)
T.0.R.N.A.D.0. 14. Apr 2009	@indomit It's NOT "the" file. There can be many good key-files ! ;) Probably, you mean, the smallest accepted key-file.
obnoxious 14. Apr 2009	thats why i said "rule bending" :) u have given away the solution and yet you have not given it out. Its a paradox :)
indomit 15. Apr 2009	Yes, I mean smallest, but why use a larger file, if crackme checks only first n bytes? ;)

haiklr's Hysteria Crackme

Download hysteria_CRKME.zip, 87 kb (password: crackmes.de)
Browse contents of hysteria_CRKME.zip

Hysteria Crackme

My last keygenme coded in asm.
Just use your brain, a pen and a paper ! No big equations... think about an original way to solve it !
BRUTEFORCING and PATCHING are always forbidden !
Writing a keygen/tutorial is the only solution allowed ;)

Have fun !

haiklr

http://haiklr.new.fr

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 31. Oct, 2007
Downloads: 1000

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by chaise, published 09. nov, 2007; download (387 kb), password: crackmes.de or browse.

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Solution by TiGa, published 06. nov, 2007; download (41 kb), password: crackmes.de or browse.

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Discussion and comments

_ninar1_ 01. Nov 2007	sh*t lost my original crackmes.de account data solution uploaded
ChupaChu 03. Nov 2007	this was a nice one.. hope to see more from you ;) BR, ChupaChu!
haiklr Author 03. Nov 2007	Thx :) ninar1 > Congratz
cyclops Moderator 05. Nov 2007	TiGa, thers a little error in ur keygen :) sFile.Format("%8X.", iHash2); In keygenme only %x is used, may have problems for names like ABCDEFG. Rest is perfect :)
TiGa 05. Nov 2007	Good catch, force of habit. ;) Solution updated and keyfile included for ABCDEFG as proof.
cyclops Moderator 05. Nov 2007	Habit , YEP! Most of us code like "%08X" for most of the time :)
Noteworthy 10. Aug 2013	Cracking done ! Thanks haiklr.

haiklr's M&M's Crackme

Download mms-crkme_en.zip, 103 kb (password: crackmes.de)
Browse contents of mms-crkme_en.zip

A little serialme, very easy, only logic ! You must use your brain and find the good serial : no bruteforcing (it will be too simple) and no patching.

-- Only for XP users : little bugs with 2000, sorry :/

Enjoy :]

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Assembler

Published: 27. Aug, 2006
Downloads: 862

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Solutions

Solution by cyclops, published 07. sep, 2006; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

AlexeyG 27. Aug 2006	Is it actually possible without bruteforce? There is a routine that makes a number from the entered serial. Then this number is compared to the one we need in a "masked" form. We can find out what number we need to get, but if I got it right, then it's impossible to reverse the routine wich makes the number from entered serial. Basicly I want to know if it's allowed to bruteforce that given part.
Ox87k 27. Aug 2006	i'm a little bit cofused! i find the right hex value to pass all checks but now i've to find the serial from this hex value.. i think isn't possibile without a bruteforce!
AlexeyG 27. Aug 2006	Well. May be I dun get something, but here is what I have: ------------------------- ebx=0; ecx=0; for i=1 to length(serial) { bl=serial[i]; ebx=ebx rol 8; ecx+=ebx; } ------------------------- that's the "encryption" routine in a madeup language. What we can get from the crackme is ECX. But to reverse the encryption and get the serial we also need ebx. So I guess it's bruteforce-only.
HMX0101 27. Aug 2006	I think the only solution for this is bruteforcing... Because for decrypt it the good value, you need ecx :(
The french beginner 27. Aug 2006	no it doesn't! you can find a valid serial with your brain you have to think more ;) (tips : a 4 char serial works perfectly)
Shism 28. Aug 2006	Is there more than 1 valid serial ?
Shism 28. Aug 2006	ya a 4 char serial, but you really do need ecx.....
Shism 28. Aug 2006	Here are the missing values, since he gave some of them.... even tho its just the masked values 38,X,44,X,46,X,X,46 We can't even solve for The x's because we don't know the original ECX
Shism 28. Aug 2006	either give us a bigger hint... or let use bruteforce it.... or get the crackme deleted..
AlexeyG 28. Aug 2006	Shism, the hex value are solvable. There are some logical equations for each of them, wich can be solved in a sec. Thinking now... Yes pass will be 4 chars and will consis of values, from the magic key. That's it I think. Am I right?
AlexeyG 28. Aug 2006	Nah, I'm wrong, but 1st char still must be 0x5F I think
haiklr Author 28. Aug 2006	Yes, I'm sure it's possible without bruteforcing (there is one 4 chars serial possible). AlexeyG > You're right for the first char :] Good luck
AlexeyG 28. Aug 2006	a = 5F a+b+c+d = D5 => d = 4 a+b+c = D1 => c = D1-80 = 51 a+b = 80 => b = 80-5F = 21 so pass is: 5F 21 51 04 ?
AlexeyG 28. Aug 2006	Edit: I made a mistake - replace D5 with F5 and you get 24 instead of 4. So pass is _!Q$. Just I thought I remembered it right, and I didnt, sorry
Shism 28. Aug 2006	How did you get a = 5F...., how did you get a+b+c+d = D5 ?.. how did you get all those values
Shism 28. Aug 2006	I mean how did you get F5
AlexeyG 28. Aug 2006	Well lets see... 1st of all you need to get the magic key, wich you almost had: 38,X1,44,X2,46,X3,X4,46 each X is a solution of smal logical equations, you can solve them easily (for each of them there are 16 possible values). Then when you get them it will give you an ASCII string, wich represents a hex value. This is where 5F,F5,D1,80 come from. And the equation system I posted before (with a,b,c,d variables) comes from the "encryption" routine - just check out what each byte is equal to. Do it step by step on a piece of paper. Pass length 4 is smallest and easiest to solve. Basicly that's it I think
Shism 28. Aug 2006	Ah so there is more than 1 solution
iLych 29. Aug 2006	ALL solutions _!Q$ !>!Q$ "=!Q$ #<!Q$ $;!Q$ %:!Q$ &9!Q$ '8!Q$ (7!Q$ )6!Q$ 5!Q$ +4!Q$ ,3!Q$ -2!Q$ .1!Q$ /0!Q$ 0/!Q$ 1.!Q$ 2-!Q$ 3,!Q$ 4+!Q$ 5!Q$ 6)!Q$ 7(!Q$ 8'!Q$ 9&!Q$ :%!Q$ ;$!Q$ <#!Q$ ="!Q$
iLych 29. Aug 2006	Remark: It was all PRINTABLE solutions. But programm will accept any solution which obey 3 terms: 1) last 3 symbols is '!' - 0x21, 'Q' - 0x51 and '$' - 0x24 2) sum of rest symbols is 0x5F 3) of cource, all symbols should be not equal to 0x00 PS: Sorry for my english :S
haiklr Author 07. Sep 2006	Thanks for your solution, cyclops :]
Noteworthy 09. Aug 2013	Cracked, thanks haiklr for this crackme.
evaboy 09. Aug 2013	@Noteworthy, please post your detailed solution tutorial.
arlkers 07. Aug 2014	/ / assuming the 4 digit, 1234 / / 4 logical circulation after: //00003100 //00313200 //31323300 //32333431, adding up to 2 non zero / / by 80D1F55F, thrust is: 5F (80-5F) (D1-80) (F5-D1)::"_!Q$" // Hypothesis 5 digit, 12345 / / 5 logical circulation after: //00003100 //00313200 //31323300 //32333431 //33343532, adding up to 2 non zero / / by 80D1F55F, thrust for: (5F-x) x (80-5F) (D1-80) (F5-D1) (x>=20): "??!Q$" / / to the characters from the keyboard input ASCII code for a minimum of 20h (space), // 5f/3=1f, non input character. max 5 bit ALL solutions _!Q$ ?!Q$ !>!Q$ "=!Q$ #<!Q$ $;!Q$ %:!Q$ &9!Q$ '8!Q$ (7!Q$ )6!Q$ 5!Q$ +4!Q$ ,3!Q$ -2!Q$ .1!Q$ /0!Q$ 0/!Q$ 1.!Q$ 2-!Q$ 3,!Q$ 4+!Q$ 5!Q$ 6)!Q$ 7(!Q$ 8'!Q$ 9&!Q$ :%!Q$ ;$!Q$ <#!Q$ ="!Q$

haiklr's Sad Princess Keygenme

Download Sad_Princess_Keygenme.zip, 481 kb (password: crackmes.de)
Browse contents of Sad_Princess_Keygenme.zip

â€ Sad Princess Keygenme â€

A keygenme coded in asm...
Just use your brain, a pen and a paper, it's only logical and maths :]
BRUTEFORCING and PATCHING are forbidden ! Writing a keygen/tutorial is the only solution allowed ;)

Enjoy :]

haiklr

klr63@hotmail.com
http://haiklr.new.fr

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 04. Jul, 2007
Downloads: 1235

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by KernelJ, published 25. jul, 2007; download (3 kb), password: crackmes.de or browse.

KernelJ has rated this crackme as boring.

Solution by TiGa, published 19. jul, 2007; download (69 kb), password: crackmes.de or browse.

TiGa has rated this crackme as awesome.

Solution by Crosys, published 19. jul, 2007; download (214 kb), password: crackmes.de or browse.

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Discussion and comments

Crosys 05. Jul 2007	Cool crackme, im halfway solving it i think.. thx
Crosys 06. Jul 2007	Solved it =), tnx
haiklr Author 08. Jul 2007	Thx ! I'm waiting for your solution :]
XzzX 15. Jul 2007	very nice crackme, ideed
ChupaChu 18. Jul 2007	Yes i agree only you must be a mathematics phd to solve this math stuff ;)
KernelJ 18. Jul 2007	On first inspection it appears to be a sequence of logic puzzles... I'm probably right but there is one very confusing thing about where this data comes from...
KernelJ 19. Jul 2007	IMO this keygen failed as a keygen on many levels. Firstly, there are 3 different valid passwords (somehow I managed to miss one of those). Secondly the first part of the serial is always the same if your registering name is long enough. Thirdly, the output goes where you type in the password. (WTF?) Without any kind of anti-debug or encryption, this keygenme is nothing but a maths test (and a fairly easy one at that if you know anything about maths). The only good thing about it was the music.
ChupaChu 23. Jul 2007	Well done TiGa !! It looks i failed on ArcTan part (1st part of the serial) - math is a nightmare for me too :) @haiklr: nice name fro this keygen me, hope to see new keygenme from you - but with less trigonometry :)
haiklr Author 29. Jul 2007	Congrats, thx for your solutions :] @ChupaChu : don't worry, my next crkme doesn't use only trigonometry (but there'll be maths sorry :)
moth 31. Jul 2007	@haiklr:nice crackme.I for ysolved it. i wait for your next crackme.:D
simonzack Moderator 12. Jun 2008	nice one, maths was so long, i solved the first pass, and found out another 2 passes! ... nice, but very long crackme
Noteworthy 09. Aug 2013	Nice trigonometric tricks, crackme was long to solve it, but it's done :)

haiklr's Saturday Night Crackme

Download saturday_night-crkme.zip, 1297 kb (password: crackmes.de)
Browse contents of saturday_night-crkme.zip

Saturday Night Crackme

An original crackme coded in asm.
Just use your brain and maybe the hint ! Just think about an original way to solve it !
BRUTEFORCING and PATCHING are always forbidden !
Finding the good password with your brain is the only solution allowed ;)

Have fun !

haiklr

http://haiklr.new.fr

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 13. Apr, 2009
Downloads: 518

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by T.0.R.N.A.D.0., published 17. apr, 2009; download (16 kb), password: crackmes.de or browse.

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Discussion and comments

T.0.R.N.A.D.0. 13. Apr 2009	Why is the readme NOT in English ??????
jessica 13. Apr 2009	wonder why it's too big 1.2 mb!!!!
T.0.R.N.A.D.0. 13. Apr 2009	'cuz it has an mp3 !
T.0.R.N.A.D.0. 14. Apr 2009	Nice crackme again ! Solved the secret number, but still struggling for the good-boy! I don't know what 2 do with MP3Stego, it always shows unexpected end !
T.0.R.N.A.D.0. 16. Apr 2009	Oh man ! Finally, I got it ! :) This was was really good. Will submit a tut by tomorrow.
T.0.R.N.A.D.0. 17. Apr 2009	Uploaded a hopefully COMPLETE solution.
Noteworthy 09. Aug 2013	Nice Math/Algo tricks, thanks haiklr.

haiklr's Scandal0us C0de

Download Scandal0us_C0de-haiklr.zip, 115 kb (password: crackmes.de)
Browse contents of Scandal0us_C0de-haiklr.zip

Scandal0us C0de

My last keygenme coded in asm.
Just use your brain, a pen and a paper, it's only logical and maths, as the last time ^^
BRUTEFORCING and PATCHING are always forbidden !
Writing a keygen/tutorial is the only solution allowed ;)

Have fun !

haiklr

klr63@hotmail.com
http://haiklr.new.fr

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 30. Jul, 2007
Downloads: 777

Rating

Votes: 4
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to hak3r »

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Discussion and comments

Crosys 01. Aug 2007	Nice one, solved it :D gj again haiklr
halsten 01. Aug 2007	A nice one indeed.
evilcry1 01. Aug 2007	Nice, truly nice, but i did not understand why it crashes on my Win 2k3. On XP works fine ;)
Ox87k 01. Aug 2007	nice one haiklr, good job! btw, reverse the fpu part isn't that easy for me..
Zaphod 01. Aug 2007	I can find a number ( 12135053 ) for the first editbox that makes it 7 times through the loop from 4025AD to 4025CC, but not the 8th time. Am I on a completely wrong track? Is this a fake algo or something?
Ox87k 01. Aug 2007	Zaphod, it's the real algo! The first number exists, try to do some test with a pen and a paper and... ;)
haiklr Author 01. Aug 2007	Thx :] @Ox87k : i don't why it crashs on Win 2k3, sorry :s @Zaphod : no it's a true algo... 12135053 is unavailable, your number must make it 8 times through the loop ;)
TiGa 02. Aug 2007	Does it crash on startup or when the button is clicked?
evilcry1 02. Aug 2007	It crashes when is launched
TiGa 02. Aug 2007	I've debugged the crash under Vista x64 and it happens at 004028FE call GetLocalTime The same code under XP SP2 is: 004028FE call GlobalAlloc The same thing must be happening under 2K3.
Zaphod 02. Aug 2007	Yeah!! : I solved the crackme! Oh no!! : I bruteforced! Awww...
Ox87k 03. Aug 2007	Zaphod, did you bruteforce the second part (the fpu's part) or the first? I don't understand how to solve the fpu.. some hint?
Zaphod 04. Aug 2007	0x87k: I am a little ashamed to say that I bruteforced both parts :( I don't see how you can logically deduct the number for the first textbox. As for the fpu-part: You take the sine for the numbers in box 2 and 3, multiply them and round the result off to an integer. This integer must be 0. That means that both sines must be very small. So I wrote a short routine that went through the numbers between 1 and 100000000 to find two numbers with very small sines. Perhaps this part can be solved by using some formula involving sin and cos, I don't know...
evilcry1 04. Aug 2007	@Zaphod: It's just a mathematical inversion, if you make a little change of abstraction level you will see that: Sum = aA^2 + ... + nN^2 n = Costant N = Your Value Next you have an IDIV, but you can consider it as a MOD operation.. Make the correct inversions and you will have the solution.. Can be used also a Math Modelling program as Mathematica to do that @0x87k: Still working on it, i'll send you some hint when finished ;) Have a nice Day
Zaphod 04. Aug 2007	evilcry 1: I'm afraid I don't quite understand what you mean. We are dealing with an 8-digit number, num = n1n2n3n4n5n6n7n8 which is divided with 2,3,4...9, so that: num MOD 2 = n1 num MOD 3 = n2 num MOD 4 = n3 ... num MOD 9 = n8 How do you inverse that and find num?
evilcry1 04. Aug 2007	There is a way to reverse this, you need some Number Theory concept ;) Regards
haiklr Author 05. Aug 2007	evilcry1 is alright, for the first part, think about arithmetic basics :) it's only logical and deduction, you don't need to calculate anything :] For the fpu part, think about this equation : sin(x) = 0 ... what can be x ? Good luck !
Ox87k 06. Aug 2007	@haiklr: I found only one couple of values after some test that it allow me to solve it. But i don't think there is only one..
haiklr Author 06. Aug 2007	@Ox87k : no there's several couples of values which are okay. However, one couple is sufficient :] If you found one, you solve the crackme ;)
Zaphod 08. Aug 2007	haiklr: Yes, if sin(x) = 0, x should be PI, 2PI, 3PI etc., so we shall find a whole number that is very close to a multiple of PI. But it seems to me that this involves some bruteforcing unless we have some formula that can help. Do we have such a formula?
haiklr Author 08. Aug 2007	@Zaphod : yes, you're okay... the aim of this crkme is to find an approximation of pi ;) Bruteforcing is forbidden, so you must to find an other way to solve this problem. However, many ways are used to approximate irrationnal numbers (exp, square root of 2...), and they don't need to bruteforce. Maybe search about continued fractions... it's a big hint ;) Good luck !
evilcry1 09. Aug 2007	continued fractions... it's a big hint ;) :D:D yeah truly big big big!
Zaphod 09. Aug 2007	He! I'm sure it's a big hint - if you know what continued fractions are. Hmm - I'll try Google...
Zaphod 10. Aug 2007	haiklr + evilcry 1: Thanks for directing my attention to continued fractions. There are some really good sites on this subject. Very interesting! Now I can find the numbers for box 2 and 3 using pen and paper. What part of Number Theory should I know something about to find the number for the first box?
Ox87k 10. Aug 2007	Zaphod, try to read here: http://en.wikipedia.org/wiki/Continued_fraction After that, just write in a paper the fpu calcs like a phormula and finally try to tie this with the reading... Sorry for my bad english.. :(
Zaphod 10. Aug 2007	0x87k: No, I think you misunderstand - I have finished the fpu-part. Now it's the modulo-part I'm thinking about.
haiklr Author 10. Aug 2007	@Zaphod : think about arithmetic basics, in particular about divisibilty. I think you must reduce step by step the different possibilities, according to the divisors. Sorry for my english :/
EFLAGS 12. Aug 2007	One of the answers: 11121217?589 80143857 16707065 589与ComputerNam的校验和有关。 sin(80143857) * 10000000 * 100000000 * sin(16707065)近似取整(frndint指令)结果为0。
EFLAGS 12. Aug 2007	Scan 3..200000000 to find x that sin(x)<=2.265e-8。
Noteworthy 09. Aug 2013	Cracking done ! Math rocks. Thanks haiklr.

hak3r's Keygen me by hak3r

Download keygen-me.zip, 304 kb (password: crackmes.de)
Browse contents of keygen-me.zip

Rules: Keygen
Level: 2/10
Created by: hak3r
Greetz: to all uNkn0wn.eu Members & tport team
Language: Delphi 10 lite
Packer: Nothing found

Good luck :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 29. Jun, 2007
Downloads: 1131

Rating

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Solutions

Solution by waganono, published 30. jun, 2007; download (380 kb), password: crackmes.de or browse.

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Solution by TiGa, published 30. jun, 2007; download (33 kb), password: crackmes.de or browse.

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Send a message to Haldir »

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Discussion and comments

waganono 29. Jun 2007	That's very easy, make it harder. But that is well coded! Thanks
hak3r Author 30. Jun 2007	thanks i will make it more harder :)

Haldir's Applied Mathematics Crackme 1

Download apmath1.zip, 19 kb (password: crackmes.de)
Browse contents of apmath1.zip

Modular Arithmetics Crackme

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Mar, 2003
Downloads: 759

Rating

No votes yet.
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Solutions

Solution by nucleon, published 02. jan, 2004; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

halsten's ChainREACTION

Download ChainREACTION.zip, 17 kb (password: crackmes.de)
Browse contents of ChainREACTION.zip

Write a keygen for the crackme, patching is not allowed of course. Before you write a keygen, you'll have to figure out a way to extract the crackme. Have fun.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 03. Mar, 2007
Downloads: 437

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Solutions

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Discussion and comments

halsten Author 03. Mar 2007	I apologize but, there's a bug in the main crackme, and I don't have much time to fix it now, sorry! P.S: The first 2 levels of the crackme are corect.
r0ck 03. Mar 2007	Interesting crackme halsten. What's the bug you're referring to? It crashes whenever I hit "Check"...?
halsten Author 03. Mar 2007	r0ck: That's the bug. And unfortunately I'm very busy these days. The bug is triggered due to a conflict with a part of the code and the protection scheme. Again, I apologize for the inconvenience.
r0ck 03. Mar 2007	No problem, at least I know it wasn't my unpacking that did it! =)
halsten Author 03. Mar 2007	r0ck: Sure it needed unpacking? ;)
r0ck 03. Mar 2007	I regretted that as soon as I clicked the submit button. ;) I should have said "extracting"...
halsten Author 03. Mar 2007	r0ck: No problem. :)
Ox87k 03. Mar 2007	a little hint to extract the crackme?? :) I tried to work with PE's bytes but seems to be the wrong way..
r0ck 03. Mar 2007	Ox87k: "This program cannot be run in DOS mode"
halsten Author 05. Mar 2007	Ox87k: Think about a small and old cipher. :)
Shism 07. Aug 2007	How do you extract this thing lol ? Do we have to decrypt the current text ?
saitob 07. Aug 2007	Yes, it's encrypted and you need to decrypt it. The only problem is to figure out what kind of encryption is used.

halsten's CrackME1

Download crackme_1.zip, 5 kb (password: crackmes.de)
Browse contents of crackme_1.zip

Nothing special, just an easy crackme for beginners, have fun. Just write a simple keygen for the crackme.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Assembler

Published: 29. Jan, 2007
Downloads: 1009

Rating

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Solutions

Solution by Drakenza, published 22. jun, 2007; download (135 kb), password: crackmes.de or browse.

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Solution by Kostya, published 31. jan, 2007; download (5 kb), password: crackmes.de or browse.

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Solution by saytos, published 08. feb, 2007; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

saytos 30. Jan 2007	I solved it! :) Today public my solution.
halsten Author 30. Jan 2007	Saytos: Great, thanks for giving time to solve the crackme, I hope you enjoyed it. :)
mucki 30. Jan 2007	nice one - i like short algos :)
Kostya 31. Jan 2007	Huh! Good algo! :)) I like RDTSC checks :)
halsten Author 31. Jan 2007	Yes, the algorithm is short and straight to the point. :)

halsten's CrackME2

Download crackme_2.zip, 4 kb (password: crackmes.de)
Browse contents of crackme_2.zip

Just like the previous CrackME1, now it's getting a little harder. Write a keygen for it.

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: Assembler

Published: 31. Jan, 2007
Downloads: 3973

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by marius_mtm, published 21. apr, 2007; download (2 kb), password: crackmes.de or browse.

marius_mtm has rated this crackme as quite nice.

Solution by BaKaE, published 19. feb, 2007; download (207 kb), password: crackmes.de or browse.

BaKaE has rated this crackme as quite nice.

Solution by Kostya, published 08. feb, 2007; download (4 kb), password: crackmes.de or browse.

Kostya has rated this crackme as quite nice.

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Discussion and comments

halsten Author 01. Feb 2007	There's something funny about this one. :]
hardcoder 01. Feb 2007	Mate, don't mind, 3 is tooooooooooo much high ranking for this cm, nothing special except code obfuscation. regards
Kostya 01. Feb 2007	..maybe because the last one was a bit easyer, so now it is getting harder!? :) but algo looks the same :), i mean about keygenning :P, btw solution sent.. :)
halsten Author 02. Feb 2007	It's meant to be for beginners, not everyone is as good as you might be, that's it.
BaKaE 02. Feb 2007	yes 3 is tooooo high, for everyone. btw this funny thing, is this the wrong crackme name ?? caus its still crackme1 ;)
halsten Author 02. Feb 2007	Yes, it's the wrong name, I forgot to change the old name from my template skeleton file.
Devoney 05. Feb 2007	Deffinitly not 3-Getting Harder. At most 2- Need a little brain of luck. The checkup after the second GetDlgItemText call is way to simple. A username and password of 4 chars is enough. And only 2 chars of the username are changed to be equal to the password. Besides the difficulty rating being not correct this crackme is good for beginners like me. Thanks for creating it. Lot of code though for assembler!
hound 08. Feb 2007	Im not familar at all with obfustication :(. A good tutorial would be great from someone who solved it (or any other tutorial/reading links).

halsten's CryptoME1

Download CryptoME1.zip, 70 kb (password: crackmes.de)
Browse contents of CryptoME1.zip

CrptoME is a crackme where you need to generate a signature file in order for the crackme to work, patching is not allowed. Have fun!

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 08. Feb, 2007
Downloads: 642

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Solutions

Solution by MR.HAANDI, published 05. aug, 2007; download (577 kb), password: crackmes.de or browse.

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Discussion and comments

halsten Author 16. Feb 2007	Is it boring or what?
halsten Author 07. Jul 2007	No solutions yet?
saitob 08. Jul 2007	I'll guess not :D
halsten Author 09. Jul 2007	hmm...why don't you give it a try saitob? ;)
saitob 01. Aug 2007	Ohh no.. I'm to much of a noob to take a level 4 challenge:)
halsten Author 01. Aug 2007	hmm...maybe am wrong about the difficulty? :þ
saitob 01. Aug 2007	I took a look at it -> Didn't understand a crap xD
halsten Author 01. Aug 2007	Okay, no worries my friend. :)
MR.HAANDI 01. Aug 2007	oh yes, some crypto inside I hope not modified I'd like to ask, is only one cookie possible or lots of them?
MR.HAANDI 01. Aug 2007	mhhh, the crypto doesn't really BLOW my mind, but the 20byte xoring is fun to think about
halsten Author 02. Aug 2007	Not only one cookie. :)
halsten Author 02. Aug 2007	MR.HAANDI: How about writing a tutorial and uploading your solution as well. This way everybody learns. Thanks!

halsten's SomethingToHide

Download SomethingToHide.zip, 10 kb (password: crackmes.de)
Browse contents of SomethingToHide.zip

This crackme is full of surprises, all I have to say is that you need a drink with it and a clear mind as well. So I hope you enjoy it.

What is required from you is to write a working keygen for it.

P.S: Name must be greater than 5 characters.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 14. Jan, 2008
Downloads: 464

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Solutions

Solution by antofik, published 29. mar, 2008; download (26 kb), password: crackmes.de or browse.

antofik has rated this crackme as nothing special.

Solution by Trundle, published 19. jan, 2008; download (1669 kb), password: crackmes.de or browse.

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Send a message to happytown »

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Discussion and comments

soychino 15. Jan 2008	nice crackme don't know how to unpack,but the algo is very easy;)
Computer_Angel 15. Jan 2008	i could not run it. nothing come out when running.
soychino 15. Jan 2008	it works well on my computer,Windows XP sp2
halsten Author 15. Jan 2008	@soychino: Sorry my friend, but you will need to dump it first.
halsten Author 15. Jan 2008	@Computer_Angel: What happens exactly?
Ox87k 15. Jan 2008	me too, it doesn't run on my os, WinXp Sp2. Nothing appears.
halsten Author 15. Jan 2008	Ox87k: I have WinXP SP2 and it runs smoothly in here.
fromTurkey 20. Jan 2008	hello guys. i have submııted a code today but i couldnt see my submit here. is that any wrong coming from me? the site says your upload has been submit but i couldnt see it? thanks for all...;)
halsten Author 20. Jan 2008	@fromTurkey: Your solution has to be approved by the moderators first.
saitob 20. Jan 2008	A very nice crackme Halsten. Keep the good work up!
halsten Author 20. Jan 2008	@saitob: Thank you. :)

Ox87k 12. Jan 2007	I don't understand why ur crakmes have always a little difficult when therefore they are absolutely more harder than 2! Btw, this one is my first happytown's crackme solved! I'm going to write a solution for this one. Surely the name's lenght check is a pain in the ass!!!!! Good job mate!
Ox87k 13. Jan 2007	sorry, i would mean serial's lenght and format check are pain in the ass! :P

happytown's CrackMe.HappyTown.VC.0035

Download CrackMe.HappyTown.VC.0035.zip, 111 kb (password: crackmes.de)
Browse contents of CrackMe.HappyTown.VC.0035.zip

This keygenme is not for newbiez. Because it needs math knoledge to solve it.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 04. Dec, 2006
Downloads: 823

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Solutions

Solution by HMX0101, published 26. jun, 2007; download (57 kb), password: crackmes.de or browse.

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Discussion and comments

bLaCk-eye Moderator 05. Dec 2006	Easy...to easy.I'll wait for your next one ;) Regards
Ox87k 05. Dec 2006	bLaCk-eye: hei mate, what's up?? Btw, try his CrackMe HappyTown 0034 :) This one is easy also for me, good job happytown!
HMX0101 05. Dec 2006	This one is very easy... specially for newbies ;)
bLaCk-eye Moderator 06. Dec 2006	Guys i'm waiting for your solutions then ;)

happytown's CrackMe.HappyTown.VC.0039

Download CrackMe.HappyTown.VC.0039.zip, 104 kb (password: crackmes.de)
Browse contents of CrackMe.HappyTown.VC.0039.zip

Some math knowledge is a must.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 12. Dec, 2006
Downloads: 894

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Solutions

Solution by Numernia, published 08. mar, 2010; download (82 kb), password: crackmes.de or browse.

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happytown's CrackMe_0010

Download CrackMe_0010.zip, 13 kb (password: crackmes.de)
Browse contents of CrackMe_0010.zip

This is my 10th crackme, enjoy!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 05. May, 2006
Downloads: 686

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by Dr.Korbin, published 02. sep, 2006; download (37 kb), password: crackmes.de or browse.

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Discussion and comments

znycuk 05. May 2006	Serial algo is rather long...
Zaphod 22. May 2006	I submitted my solution but it was rejected because my keygen is a selfkeygen :( I'll just have to wait for someone to come up with a better solution...
indomit 22. May 2006	Reversing of algo take very much time, and bruteforcing too. :/

happytown's CrackMe_0026

Download CrackMe_0026.zip, 40 kb (password: crackmes.de)
Browse contents of CrackMe_0026.zip

This is my 26th CrackMe(keygenme), some math knowledge is a must.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 27. Oct, 2006
Downloads: 733

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by andrewl.us, published 05. may, 2009; download (55 kb), password: crackmes.de or browse.

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Discussion and comments

geeko 27. Oct 2006	Is the SEH important for the algo? or is just the default from the C compiler? or is just a debugger trap?
bLaCk-eye Moderator 27. Oct 2006	Stop asking questions like that.Is your task to analyse and understand the protection ;). bLaCk
jB_ 27. Oct 2006	I was happy to see a crypto keygenme but... nothing new here.
happytown Author 31. Oct 2006	jB, I will submit a new one next time. I hope U will enjoy!
jB_ 31. Oct 2006	Ok HappyTown. Your keygenme is not bad at all, but brings nothing new (look at pDriLl's last keygenme...). I'm waiting your for next one!
Anasazi 01. Nov 2006	If you NOP the ASM code on VA 0040108C it's done ^_^. Gonna try figure out the algo
happytown Author 04. Nov 2006	Hi, Anasazi. U did well....^_^
shellwolf 06. May 2009	hoho.happytown's crackme.

happytown's Crackme ###1

Download CrackMe_###1.zip, 17 kb (password: crackmes.de)
Browse contents of CrackMe_###1.zip

This is my first Crackme.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 24. Jul, 2005
Downloads: 846

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Solutions

Solution by EsKiMo, published 01. aug, 2005; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

ap0x 27. Jul 2005	Easy one, but there is no clasic serial calculation algo beacause nothing needs to be calculated :)

harlequin's ClickPad

Download clickpad.zip, 5 kb (password: crackmes.de)
Browse contents of clickpad.zip

Simple XOR

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 29. Dec, 2002
Downloads: 1861

Rating

Votes: 3
Crackme is boring crap.

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Solutions

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harlequin's crackme #1

Download harl_cm1.zip, 27 kb (password: crackmes.de)
Browse contents of harl_cm1.zip

encrypted libraries - crypto knowledge a...

Difficulty: 9 - You can't solve this yourself :)
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Sep, 2000
Downloads: 2804

Rating

Votes: 6
Crackme is boring.

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Solutions

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Solutions

Solution by Bswap, published 01. jan, 2003; download (3 kb), password: crackmes.de or browse.

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Solution by harlequin, published 01. jan, 2003; download (39 kb), password: crackmes.de or browse.

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harlequin's Logic

Download logic.zip, 13 kb (password: crackmes.de)
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Its Logical

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Apr, 2003
Downloads: 1805

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Solutions

Solution by Kythen, published 22. may, 2003; download (3 kb), password: crackmes.de or browse.

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harlequin's Mazie

Download mazie.zip, 30 kb (password: crackmes.de)
Browse contents of mazie.zip

Are you good enough to rescue Mazie?

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 31. Mar, 2003
Downloads: 1758

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Solutions

Solution by OorjaHalT, published 16. apr, 2003; download (1 kb), password: crackmes.de or browse.

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Solution by ShadowKat, published 10. apr, 2003; download (2 kb), password: crackmes.de or browse.

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harlequin's SaveMe

Download saveme.zip, 13 kb (password: crackmes.de)
Browse contents of saveme.zip

A screen saver

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 23. Apr, 2003
Downloads: 1800

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thomas.idpz.net has rated this crackme as nothing special.

Solution by __imp__, published 29. oct, 2007; download (12 kb), password: crackmes.de or browse.

__imp__ has rated this crackme as nothing special.

Solution by xylitol, published 27. oct, 2007; download (216 kb), password: crackmes.de or browse.

xylitol has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

sd333221 25. Oct 2007	For me it doesn't even start. Windows Xp SP2.
mindless 25. Oct 2007	sd333221, in order to get the crackme running on XP you should activate the Windows 95 compatibility. At least, this worked for me :-)
br0ken 25. Oct 2007	It works for me without compatibility.
K3LVIN 25. Oct 2007	This is not working may be because of the problem of XP style without enabling CommonControls.
sd333221 25. Oct 2007	Yes, after Windows 95 compatibility it works
sd333221 27. Oct 2007	You made a mistake, the buffer for the computername is too small. Therefore my computername is not involved in the serial. I don't like that
haunte Author 27. Oct 2007	i fixed the bug and submitted a new version.i dunno when they'll update
TiGa 27. Oct 2007	Crackme updated with the new version
DiSTANTX 27. Oct 2007	nice one but quite easy ;)
TiGa 01. Nov 2007	The submission of solutions is closed for this crackme.
SIDEBOTTOM 15. Nov 2007	A straightforward CrackMe with a very clear and concise algorithm. Excellent for beginners!
d4rK_r3v3rs3R 04. Oct 2014	Name: d4rK_r3v3rs3R Key: 69397b3ez27b2677267b6626zbd

Download FCETrialCrackme.zip, 6 kb (password: crackmes.de)
Browse contents of FCETrialCrackme.zip

A rather hard but still on the easy side crackme. it isnt TO hard but knowledge might be necesary..
NAG Screen, Disabled button, Name/Serial

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 11. Oct, 2004
Downloads: 955

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Solutions

Solution by xyzero, published 13. oct, 2004; download (36 kb), password: crackmes.de or browse.

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Solution by ManWithNoName, published 13. oct, 2004; download (2 kb), password: crackmes.de or browse.

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Haykuro's KeygenMe By Haykuro

Download KeygenMe_By_Haykuro.zip, 4 kb (password: crackmes.de)
Browse contents of KeygenMe_By_Haykuro.zip

Rather tricky crack me.. 
 
Dont beleave everything you see!

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 23. Mar, 2005
Downloads: 781

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Solutions

Solution by Ank83, published 01. jun, 2006; download (30 kb), password: crackmes.de or browse.

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Haykuro's KeygenMe v1.00

Download KegenMe.zip, 50 kb (password: crackmes.de)
Browse contents of KegenMe.zip

only 2 rules:
no patching (this means no keygen injection eigther)
you MUST make a keygen for it to be acceptable.(solution must come with it)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Unspecified/other

Published: 26. Nov, 2004
Downloads: 962

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Solutions

Solution by calculici, published 12. dec, 2004; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

lgtngstk 13. Sep 2008	I thought commercial packers weren't allowed.
zairon Moderator 14. Sep 2008	The crackme is dated November 2004, if I recall correctly we inserted the rule about commercial packer later in 2005/6.
Zaphod 14. Sep 2008	What about the program, Caspr 1.012, that is mentioned in calculici's tut? A search for the program gives a lot of warnings about the prog being malware, spyware. Anyone know what is right or wrong about this?

Haykuro's OMG

Download omg.zip, 4 kb (password: crackmes.de)
Browse contents of omg.zip

A rather novice style noob crackme.
Protections:
- Easy anti-debug protection.
- Some hidden routines.

Rules:
- NO PATCHING!
- NO BRUTEFORCING!
- ONLY VALID SOLUTION = KEYGEN!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 05. Oct, 2008
Downloads: 429

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Solutions

Solution by str_2006, published 08. oct, 2008; download (5 kb), password: crackmes.de or browse.

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Solution by user2k, published 08. oct, 2008; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

str_2006 06. Oct 2008	nice one, i am look at it. keygen in progress.
Haykuro Author 09. Oct 2008	very good job user2k! :) you hit the nail on the head. str_2006, your keygen is also functional but you didn't fully understand what the 0x80001 was.. it was simply to see if the number is divisible by 2. (a.k.a. value % 2) great job guys :)

[HBK]'s indiana jones si vrajitorul din oz

Download indi.zip, 90 kb (password: crackmes.de)
Browse contents of indi.zip

indiana jones needs your help
he must find the wizard of oz

dificulty level: easy [if you have a little luck]
accepted solutions:
-find the password, all 'tablets' must be 'pushed'
-the sequence of pushed tablets
i.e. [4,1], [2,4] etc
-optional: ALL the possible sequences
-NO PATCHING ALLOWED

HBK

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 20. Mar, 2011
Downloads: 282

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Solutions

Solution by andrewl.us, published 07. apr, 2011; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

vptrlx 22. Mar 2011	it is done by pushing keys in random order until all of them are pushed :) RAARCAATMOADMADCAAAAB, for example
[HBK] Author 22. Mar 2011	nope :) try harder
vptrlx 25. Mar 2011	ok,ok you didn't say that you want the specific abracadabraaa. but it is still done by pressing them in random order :) "congratulations, bla-bla-bla"
Zephy 26. Mar 2011	waw, nice gui and music, i like it ;-)
DOLEM 27. Mar 2011	Nice music :) But we think solution is another one, cause we tried 4 funny method of vptrlx, but message still doesn't appear...
DOLEM 27. Mar 2011	. sorry for bad english .
vptrlx 30. Mar 2011	DOLEM, u need to do anything so that the text is abracadabraaa and all buttons are pushed. it can be done using random pressing ;)
xpoy 24. Apr 2011	really cool game :P it spend me massssss time to try one out by myself. but it's able to calc all out as I think, or at least able to brute force out. at first I just think there are a simple key: ABRACADABRAAA 0040158F . 68 00604000 PUSH indiana.00406000 ; \|String1 = "AAARBADACARBA" but the really key is A, B, R, must careful at who will exchange by them... 3,4 1,4 3,2 4,4 2,2 3,4 1,2 3,3 4,1 2,4 3,4 3,3 4,2 3,3 2,1 some helpful tips for next hand tester: you can log [ebp+10] in here, for log your sequence 00401356 > . 837D 10 65 CMP DWORD PTR SS:[EBP+10],65 and ths anrewl.us's great job, beatiful solve /:^] as great to HBK, cool job.

^heiko's powerlame

Download heiko_plame.zip, 906 b (password: crackmes.de)
Browse contents of heiko_plame.zip

serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Jun, 2000
Downloads: 1532

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Solutions

Solution by luucorp, published 18. dec, 2002; download (3 kb), password: crackmes.de or browse.

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Solution by EOD, published 27. jun, 2000; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

p1nasIAT 12. Aug 2008	For anyone interested this is a DOS crackme

heinz's Fedor Rumin Keygenme 1

Download fedor_rumin_kgnme.zip, 91 kb (password: crackmes.de)
Browse contents of fedor_rumin_kgnme.zip

Fedor Rumin Keygenme 1

:: the story ::

The old mechanist Fedor Ryumin has three own camera robots to patrol Zaibatsu territory.
Fedor integrated original authentication algorithm based on keys which depends on name of camera watcher.
Unfortunately, Fedor has lost all three keys for his own name. :'((
He has very brittle bones and cannot move for long distances or work with his hands... Of course, he cannot disassemble cameras to restore his keys... :-\\
You must help Fedor with his disobedient gadgets!!

:: description ::

You have three levels to solve. Clean C++ code without anti-debug tricks etc. Wanna know more? Lets solve it!

[c] 2008 #CCh team

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 18. Aug, 2008
Downloads: 580

Rating

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Solutions

Solution by .ZwXxx, published 07. may, 2009; download (448 kb), password: crackmes.de or browse.

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Discussion and comments

w00b 18. Aug 2008	either that's a lot of code or my IDA pro needs more signatures.. O_O
chodon 19. Aug 2008	just wait I'll solve it.....
heinz Author 19. Aug 2008	w00b: what version of IDA do you use? sometimes not signatures but C++ coding experience can help more. and you wrote to me about static linking... i used it for two reasons: 1) i like static linking 2) i don't like stupid messages like "this shit doesn't run on my computer" ;)
kao 19. Aug 2008	How about "this shit crashes on my computer"? ;) On certain keys crackme exits with "This application has requested the Runtime to terminate it in an unusual way." and on certain keys - just gets into eternal loop printing "key1: key1 is bad! ...." It's a bug or a feature?
heinz Author 19. Aug 2008	It's a fuckin bug! I was already asked about this... Unfortunately, i cannot understand why it causes - base64 function or not. Maybe in future i'll fix it and upload a new version. Now i'm going to finish my second keygenme. There will no C++ code, no cryptography and no bugs on key input (i hope ;) I don't think it will be easier but it will be absolutely different...
ARCHANGEL 20. Aug 2008	Maybe it's too hard to crack but for me it's hard to avoid sleeping. It's too boring, sorry heinz, but it's only my opinion
w00b 21. Aug 2008	dont static link and i bet you'll get more people willing to solve heinz. i use IDA 5.2.
heinz Author 21. Aug 2008	okay. when i'll fix input bug, i'll build this keygenme with dynamic linking and re-upload new version here. btw, one cracker already got two keys for two levels. and maybe he even didn't find it boring ;) it's not an argument for static linking, but maybe it's an argument against laziness ;) and i promise, i'll try to make my future crackmes more interesting ;)
simonzack Moderator 21. Aug 2008	also when you don't enter 1-3 when selecting robots it keeps on printing stuff
w00b 23. Aug 2008	heinz, you have excellent stories behind your crackmes.. that what made me download them in the first place. Personally I get overwhelmed easy when I see calls within calls within calls within calls.. that's a lot of work :)
user2k 11. Oct 2008	wOOb: i use ida too (idal). and found this keygenme best so far [3 days of solving] 3rd robot now.maked flirt sigs for mi...... downloaded reference manual. so far username encoded... heinz: 1' more keygenmes with static linking [linux wine likes that :)] 2' with this keygenme i learned a lots of stuff in c++ and learned that heinz likes loops. 3 'more "cast" could help sometimes, movsx could f... up the byte sometimes... 4' what keygenme u want to see, static linked with mir.... or what ?
Numernia Moderator 12. Oct 2008	Yes, this keygenme/crackme is nice, original and the (cryptosystem) for robot 3 is funny.
user2k 15. Oct 2008	almost done, only one problem, calculation base from given lucas(), no idea how :/ xgcd(modinv), and powmod are easy with given values, but lucas ?

heinz's Fedor Rumin Keygenme 2. Genetic Quest

Download fedor_rumin_kgnme2.zip, 4 kb (password: crackmes.de)
Browse contents of fedor_rumin_kgnme2.zip

:: the story ::
The old mechanist Fedor Ryumin has stolen some shapers' things... It looks like genetic formulas of some useful creatures.
Of course, it could be a terrible monsters, but Fedor is very interested with his find. But Fedor is not a shaper, so he cannot understand how to use it %-\
Your task is to make three different codes using this formulas and sell it to Fedor.
Good luck!

:: decription ::
To solve this crackme you must create a file with a three different genetic codes.
There are NO crypto and strong math things... But it's not so easy, i think.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 20. Aug, 2008
Downloads: 537

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Solutions

Solution by cyclops, published 31. aug, 2008; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

simonzack Moderator 24. Aug 2008	god, this is really really obfuscated :S
T[9]Uvatha 24. Sep 2008	Not that much, but I'll admit there's some really interesting ways of doing things... I call old-school ASM coder :)
T[9]Uvatha 24. Sep 2008	Sorry for double post... I see what you mean now lol
simonzack Moderator 01. Jul 2009	cyclops rly nice effort like what je did with the crackme 'octopus', but you didn't complain though it can be easily automated :p i didn't understand its working even when i graphed the whole function out, and you did amazing :)

_HellDashX_'s CrackMe #1 _HellDashX_

Download CrackMe1HellDashX.zip, 49 kb (password: crackmes.de)
Browse contents of CrackMe1HellDashX.zip

This is my first crackme. Only needs disable a nag and find a valid serial.
Have fun!

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 26. Nov, 2004
Downloads: 1184

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Solutions

Solution by bpx_, published 14. jun, 2006; download (85 kb), password: crackmes.de or browse.

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_HellDashX_'s Crack #2 _HellDashX_

Download Crackme_#2.zip, 8 kb (password: crackmes.de)
Browse contents of Crackme_#2.zip

Only needs disable ALL NAGS! Easy! For disable nags training

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 04. Jan, 2005
Downloads: 2039

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Solutions

Solution by deafsheep, published 15. feb, 2005; download (11 kb), password: crackmes.de or browse.

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Solution by jack_theripper, published 08. jan, 2005; download (6 kb), password: crackmes.de or browse.

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Solution by aSieR, published 08. jan, 2005; download (11 kb), password: crackmes.de or browse.

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Solution by [FiS], published 08. jan, 2005; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

Noteworthy 25. Apr 2011	MADE US SOMETHING GOOD, OR I SHOOT U. Anyway, thank you.

_HellDashX_'s Porfia Crackme

Download Crackme.zip, 41 kb (password: crackmes.de)
Browse contents of Crackme.zip

PSP CRACKME V.01

The main goal is make a keygen for it and explain ALL PROTECTIONS!
NOT IS A SOLUTION A KEYGEN ALONE! YOU NEED EXPLAIN ALL PROTECTIONS!

Rules:
* NO PATCHING! YOU CANT PATCH THE FILES IN THE DISK, BUT YOU CAN MAKE HOOKS ETC
* NO KEYFISHING!

Repeat -> THE MAIN GOAL IS MAKE A KEYGEN AND EXPLAIN ALL PROTECTIONS!

PS. Put crackme.prx in the ms root folder ! ONLY FOR 5.00 M33-3!!!

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 29. Nov, 2008
Downloads: 250

Rating

Votes: 4
Crackme is quite bad.

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Solutions

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Discussion and comments

evaboy 15. Aug 2015	Not running on win8 pro x64. More hints please.

HellspawN's HellspawN

Download crackme_2.0.zip, 158 kb (password: crackmes.de)
Browse contents of crackme_2.0.zip

Find a valid regcode and keygen it.

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Aug, 2004
Downloads: 1137

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Solutions

Solution by Plasmator, published 22. sep, 2004; download (3 kb), password: crackmes.de or browse.

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HellspawN's ~Hellsp@wN~

Download crackme_1.0.zip, 157 kb (password: crackmes.de)
Browse contents of crackme_1.0.zip

Find a valid s/n for your name

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 31. Jul, 2004
Downloads: 1276

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Solutions

Solution by Plasmator, published 20. aug, 2004; download (8 kb), password: crackmes.de or browse.

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Solution by bRaiN_faKKer, published 20. aug, 2004; download (25 kb), password: crackmes.de or browse.

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Hellsp@wn's CrackMe 3

Download CrackMe3.zip, 200 kb (password: crackmes.de)
Browse contents of CrackMe3.zip

--------------------------------
CrackMe 3 by Hellsp@wn
--------------------------------
name: CrackMe3.exe
packed: no
compiler: Delphi 7
target: find valid s/n or patch it.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 08. Dec, 2006
Downloads: 699

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by Gyver75, published 19. may, 2009; download (2625 kb), password: crackmes.de or browse.

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Discussion and comments

kaiZer-by 09. Dec 2006	see this topic at www.cracklab.ru =)
Hellsp@wn Author 10. Dec 2006	there no s.n. only discussion =)
Hellsp@wn Author 13. Jan 2007	it's very hard? =\
Gyver75 28. Mar 2009	Hi! I found on the net this funny crackme! I bypass almost antidebug tricks: inline hooking, Hardware breakpoints detection and int3 scan with other thread (Very Bad, if the prog is under debugging, modifies some locations used to calculate the serial making it unusable);but i have a question: if i put the correct serial, the dialog form answers with a "Reg Data Checking..."? Clearly, i understand the routine behing Reg Code [10:15]... (serial's form: ******-*-*)
Gyver75 12. Apr 2009	Hi! I stop in to decrypt routine to generate 'Registered...' message. Analysing the code in Olly, i expect that the initial address stays in the range of 0x004548XX offsets because this block ( long more or less 0x68 bytes...) is clearly encrypted.But all serials (i.e xxxxxxxx-0c01-xxx or xxxxxxxx-0C03-xxx),calculated by this supposition, don't generate the right code! I forgot anything ?
Gyver75 19. Apr 2009	Hi, after a deeper analysis i found the solution! I'have forgot to consider the only address initialized in the other thread! But now the message 'You real a good cracker! Respect! ' appears ... ;)
WarRock 19. May 2009	gyver sol fuck rocks one of the best sol ever :)
Gyver75 27. Feb 2011	As a_tek7 suggested me, there's a little bug in my keygen cause an error about format string parameter passed to wsprintf() function: %8X indeed %08X! Sorry for this mistake ...!

HentaiD's crackme_1

Download crackme_1.zip, 205 kb (password: crackmes.de)
Browse contents of crackme_1.zip

Change "not registered" Text"

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 31. Oct, 2003
Downloads: 1401

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Solutions

Solution by blackacid, published 01. nov, 2003; download (5 kb), password: crackmes.de or browse.

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HentaiD's crackme_2

Download crackme_2.zip, 159 kb (password: crackmes.de)
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name / serial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 03. Dec, 2003
Downloads: 1740

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Solutions

Solution by diablo2oo2, published 27. dec, 2003; download (25 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 05. dec, 2003; download (41 kb), password: crackmes.de or browse.

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Solution by KochFolie, published 04. dec, 2003; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

Guetta 19. Apr 2007	Where is the fun ? The shorter serial-check I've ever seen, and computed with name's lenght ! Too easy to ask a keygen guy...
zairon Moderator 20. Apr 2007	Guetta, if it's level_1 there must be a reason.......
HEXiC Author 20. Apr 2007	I agree with Zairon, this is A CRACKMES DATABASE easy ones and professional ones.
Guetta 20. Apr 2007	"if it's level_1 there must be a reason...." Yes, but is it interesting ? even if you're a newbie, it exist about thousands crackmes like this one... Why the level-one are always the same ? A keyfileme or memory keygenme will be interesting for begginers, name/serial is so easy... Btw, sorry for this comment, you're probably happy to add your creation to this "CRACKME DATABASE" =)
zairon Moderator 21. Apr 2007	Guetta, we are going off topic. Check you private messages, I'll answer all your questions via pm.
deibiz_xxl 27. Dec 2007	liberty basic suxxxx if i code a keygen, i'll do in another language...
deibiz_xxl 27. Dec 2007	It's not too easy... It's a good starting point in reversing some name/serial algorithms...
r00ster 29. Mar 2008	instead of chasing the algorithm, i've patched the code to jump directly at the good-guy message after checking user name length...i know that's a pretty lame way to do this kind of things, but too bad i'm not too good at tracing serials...
Trypsid 12. Nov 2009	Cool XD I'd never tried reverse engineering anything at all, so this was a good intro! Now have a working keygen ^.^
zStyle 03. Jan 2011	W32.Torjan.a845 has been detected?

HEXiC's Easy Keygen-me 1

Download cM12.zip, 188 kb (password: crackmes.de)
Browse contents of cM12.zip

1. NO PATCHING
2. Find Serial
3. Write Keygen
4. ;) Enjoy

Its easy so no problems.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 16. Jun, 2007
Downloads: 1957

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by _InSaNe_, published 04. jul, 2007; download (201 kb), password: crackmes.de or browse.

_InSaNe_ has rated this crackme as nothing special.

Solution by red477, published 17. jun, 2007; download (206 kb), password: crackmes.de or browse.

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Solution by boonz, published 17. jun, 2007; download (83 kb), password: crackmes.de or browse.

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Discussion and comments

nblue_elf 21. Jun 2007	thanks people, i learnt a lot from this one.
_InSaNe_ 30. Jun 2007	Alright i saw the two solutions and ( no offenses) but i think my solution is different, of course the underlying algorigthm is same, but the way of keygenning is different, and yes, the easiest. @boonz : dude name can be as short as three letters long,i just saw ur keyegn and thought i would submit mine, agn no offesnes :)
Flariut 18. Jan 2008	Cool for newbies, it helped me a lot...(its the first keygen i made in a short amount of time)

HEXiC's X.o. Crew 2007 keygenn-me

Download KEYGENME.zip, 10 kb (password: crackmes.de)
Browse contents of KEYGENME.zip

This crack-me in my opinion is a very hard one, why? find the awnser your self.

1) Code a keygen
2) Ur the best
3) NO PATCHING ALLAWED

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 26. Jul, 2007
Downloads: 533

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by KernelJ, published 27. jul, 2007; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

BUBlic 26. Jul 2007	VB.NET, NO name obfuscation, NO flow obfuscation, NO rule not to use reflector. Difficulty: 3 - Getting harder: overrated, replace comparetext with settext and you have the keygen.
halsten 27. Jul 2007	Over-rated difficulty. Using reflector, everything is clear to you.
KernelJ 27. Jul 2007	Haha, I had to actually make the effort and alter a few lines of code, so that I could compile a keygen in .NET 2003... Yeah, I would say Difficulty: 0.5. Without using reflector, I'm not so sure. Name obfuscation never bothered me in reflector though. In fact that's usually a pretty trivial protection that you can pretty much ignore. Unless you have any examples to the contrary? You missed out, NO string encryption btw :P
bLaCk-eye Moderator 29. Jul 2007	Ok based on your comments we think we should set the difficulty to 2, as it does somewhat need knowledge of C# to crack it and to understand it. Thanks for your feedback.

Hiaxi's for_baby

Download forBaby_crackme.zip, 1527 kb (password: crackmes.de)
Browse contents of forBaby_crackme.zip

It's too easy CrackMe
No compress
Just find password.Name isn't change password.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 07. Jul, 2008
Downloads: 1655

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Solutions

Solution by starlight, published 10. jul, 2008; download (852 b), password: crackmes.de or browse.

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Solution by br0ken, published 10. jul, 2008; download (2664 kb), password: crackmes.de or browse.

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Solution by costy, published 10. jul, 2008; download (98 kb), password: crackmes.de or browse.

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Discussion and comments

basfreak 08. Jul 2008	What do you mean here: Name isn't change password. ?
costy 08. Jul 2008	It means "Name doesn t change the password". The password is always the same.
sYnfo 08. Jul 2008	Maybe "Name does not depend on password."? Encrypted description... What a novelty... ;)
Xspider 08. Jul 2008	whoops i wanted to say : is that mean the password is not generated from the name? sorry :p plz delete the 1st own
br0ken 09. Jul 2008	Autorun.exe PECompact 2.x -> Jeremy Collake Mods?
costy 09. Jul 2008	It's not necessary to unpack it in order to find the valid serial.
TiGa 09. Jul 2008	It's not packed, my PEiD says C++ overlay. It wouldn't start by loading the MFC framework if it was really packed.
costy 09. Jul 2008	@TiGa I think it's packed in some way: when I load it in OllyDbg, when the debugger breaks to the EIP, i type in the command line bpx xxx. xxx is not a valid API function so Olly lets me see all the api in the import table. There aren't any api here. Then I press F9 the program runs and displays its window. I type in the command line bpx x and now I can see the apis. So it is unpacked in memory.
costy 09. Jul 2008	@TiGa I noticed that a lot of sections are created in run time
TiGa 09. Jul 2008	Try to be precise when you report something wrong, the initial file is not packed but another one is. Tell me by PM if you don't want to give hints to others.
br0ken 09. Jul 2008	I've included unpacked file in my solution so that newbies can analyze as if the the cme wasn't packed at all. I don't see a reason to reject this cme. It's just my opinion.
TiGa 09. Jul 2008	When a crackme goes through, it usually is not removed. @br0ken: Just try to show in your video how you got the first and second passwords.
starlight 10. Jul 2008	I have found the password, but is used in almost cheating methods. I do not have to End Analysis of a large number of dynamic processes in the distribution and write data.
jokhacker 16. Aug 2013	Download link is broken

Hiaxi's Hiaxi CrackMe

Download CrackMe.zip, 1533 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Interesting CrackMe:) Try find key:)

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 06. Jul, 2008
Downloads: 319

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Solutions

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Send a message to Himsord »

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Discussion and comments

Bispoo 07. Jul 2008	Solved nice crackme mate. ;)
DigitalAcid 07. Jul 2008	It says i'm registered when I don't type any name or serial. Is it a bug or not =) ?
Hiaxi Author 07. Jul 2008	:) No bug Try it Nama: barisborahiaxi pass: barisbora07 :)
basfreak 07. Jul 2008	You spelled guys wrong...
Hiaxi Author 07. Jul 2008	Find other keys? I give only one.
zugo 07. Jul 2008	not other serial :s Local Settings\Temp\ir_ext_temp_0\AutoPlay\Plugins name: r1.txt serial :r2.txt
Hiaxi Author 07. Jul 2008	27 script serial has been Find it.
zugo 07. Jul 2008	that made with crackme autoplay studio i will try finding the serial :D
DigitalAcid 08. Jul 2008	If it's not a bug, then here is a picture: http://rapidshare.com/files/128126206/hiaxi.jpg
Hiaxi Author 10. Jul 2008	@DigitalAcid Yes you cracked:)
DigitalAcid 24. Jul 2008	Notice that the button is missing. @ Hiaxi: So, you are saying there are 27 different valid names/serials ? Also, what's the point of the 2 password protected zip files ?

Himsord's Infinity Keygenme v1

Download InfinityCrackme.zip, 12 kb (password: crackmes.de)
Browse contents of InfinityCrackme.zip

Welcome to the Infinity Keygenme Version 1.
This is our first crackme, took us 3 days to code.
Good luck, fellow cracker!
Information in the readme.txt file.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 25. Jan, 2016
Downloads: 286

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Solutions

Solution by iSSoGoo, published 09. feb, 2016; download (386 kb), password: crackmes.de or browse.

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Solution by acruel, published 09. feb, 2016; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

r0bert 09. Feb, 14:11	hi Himsord, thanks for taking the time to make and share your crackme, I enjoyed dodging all the traps you layed out hah
Himsord Author 09. Feb, 15:40	@everyone Thanks for the great feedback, glad you guys enjoyed it :-)!
Huss1930 02. Aug, 22:14	Freaking enjoyed this crackme. :) thanks

hinte's crackme6

Download hintecrkme6.zip, 9 kb (password: crackmes.de)
Browse contents of hintecrkme6.zip

name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. Jul, 2001
Downloads: 1426

Rating

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Solutions

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HMX0101's Alive

Download alivekgme-hmx.zip, 162 kb (password: crackmes.de)
Browse contents of alivekgme-hmx.zip

Alive

Just another crypto keygenme and delphi shit.
Only valid solution is a keygen.

Luck,
HMX0101 // 10-04-2011

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 11. Apr, 2011
Downloads: 366

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Discussion and comments

Xspider 11. Apr 2011	dude it's alive x)
yo-mismo 11. Apr 2011	is selfkeygenning allowed?
Xspider 12. Apr 2011	read what's written by author :) "Only valid solution is a keygen"
Xspider 12. Apr 2011	i guess you can't do a selfkeygen anyway! can you?
Numernia Moderator 18. Apr 2011	so whos gonna solve it.... =) ^^
Xspider 18. Apr 2011	maybe you can do it x)
HMX0101 Author 18. Apr 2011	both can do it... its not that hard :) It was coded in like 30mins, so I don't put much effort in it hehe
kingdom 19. Apr 2011	00454cf8 JE 00454DF1 ==> JE 00454DD8 dont know keygen, only crack by change jmp, it works
freesoul 21. Apr 2011	Hi :) oh I'd try it but im soo busy :(
redoC 23. Sep 2012	solved here http://forum.tuts4you.com/topic/25687-keygenme-alive/

HMX0101's A big problem..

Download BigProblem.zip, 227 kb (password: crackmes.de)
Browse contents of BigProblem.zip

A big problem... by HMX0101

An user of a program bought a registration key for it,
for as many known, remove trial limitations.. and one of his
friends (a cracker) found his registration key and leaked it
to the public... but this cracker its stupid (or just a lamer),
how it will leak a key which just works in the machine of
the user who bought the app? well.. an 0wn3d for it, will be good ;)

Now, you as the real cracker might want to keygen this bitch :)
Maybe you can use the leaked key to understand it better the algo
and deal with the mysteries which are covered by this app :D

Tasks:
- Make a keygen.. it should be easy, with the leaked key
- Write a tut!

Don't do:
- Patching!
- Bruteforcing!

Enjoy it!
Greetz to everyone who knows me, and want to ;)

01/08/2008

Difficulty: 7 - Very hard
Platform: Windows
Language: Borland Delphi

Published: 03. Aug, 2008
Downloads: 779

Rating

Votes: 3
Crackme is quite nice.

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Solutions

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Discussion and comments

redoC 08. Oct 2012	virus detection ratio 28/44 .... ???
HMX0101 Author 08. Oct 2012	A lot of junk code in this one, I'm 100% sure that's cause of AV going crazy :P

HMX0101's Back to basics

Download btobkgme-hmx.zip, 12 kb (password: crackmes.de)
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Back to Basics

You don't like crypto? then you like basic math for sure :)
Only valid solution is a keygen.

HMX0101 // 16-04-2011

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 20. Apr, 2011
Downloads: 429

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by darkelf, published 08. feb, 2012; download (8 kb), password: crackmes.de or browse.

darkelf has rated this crackme as quite nice.

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Discussion and comments

Etzulnir 22. Apr 2011	Done. New here.
vlad648 22. Apr 2011	Etzulnir You solved it?
ideku_nih 23. Apr 2011	haw about if i have no idea to keygen :( and i use old trick HexEditor modified addr 33A1 from h74 to h75 is that crazy ? do you have any other app ?
vlad648 24. Apr 2011	I do not understand where is a calculation of serial :( P.S. My English is bad, I am Russian
darkelf 26. Apr 2011	Well, either I overlook something really important or it is not possible to keygen this crackme. I think there is no system of equations that meets the needs for such a serial. I mean how could there be number that fulfill something like: (0 * x + 9 * y + 1 * z) / a = 1 (with no remainder) && (3 * x + 5 * y + 5 * z) / a = 0 && (2 * x + 7 * y + 2 * z) / a = 0 (and that's only one third of the stuff) If a system exists and you call it really "basic maths" then..., yes then I'm a complete moron.
elicn 26. Apr 2011	@darkelf, could you please point to the equations in code?
darkelf 26. Apr 2011	Sure, as stated above, if I don't overlook important parts, the fun will start at 00013CCC. The algo first checks if your serial has a certain "style" and in case it has it moves on to the equations just a couple of lines below that. But I MUST have overlooked something, because if it didn't there is no keygen. @HMX0101 I see the crc32 and what you do afterwards with the hash. But you don't seem to use it. Is it just a trap?
darkelf 26. Apr 2011	edit: OK, now I see how you are using the hash - but the problem remains. For my username "Darkelf" the table will be filled with the following numbers: 0 3 2 9 5 7 1 5 2 1 which leads to the equations problem above. The equations above are for my username. If a take for instance, the second one, we see, that it will only be 0 (no remainder allowed) if x ,y and z are also 0 - but if they are all 0, the first equation cannot resolved to 1 - Never! HMX0101, please shed some light on this. P.S. imho it far away from being a "2". It's much more difficult. If I download a crackme that says it's a "2", I'll expect fun for an hour or two (at most). This is way beyond.
da$mu 26. Apr 2011	Very easy way: 13FA1: JE SHORT keygenme.0013FB8 => 13FA1: JNZ SHORT keygenme.0013FB8
darkelf 26. Apr 2011	read: "Only valid solution is a keygen." What's not understandable in this phrase?
m@rio_crk 27. Apr 2011	HMX0101 29.19.14.3.F.F.18.F.F.87.111 mario/crk 0.C.24.8.10.10.18.C.C.30.1AA So much fun :)
darkelf 27. Apr 2011	Umm, so it's official now. I'm a complete moron. I made mistakes. Not one but two of them. The first one I made was concentrating only on the number of dots, so I left out the last number and the second one was the use of only one serial, that never produced a negative number. So I wrongly thought there are only positive numbers, which leads me on the wrong track and ended in my equation problem. Well, will never make this mistakes again. So this crackme was VERY educational. Thank you.
HMX0101 Author 27. Apr 2011	@mario_crk: nice work ;) @darkelf: you're not moron, you just omitted some stuff, that's all ;p
darkelf 27. Apr 2011	@HMX0101: Thanks, you are really kind, but I was somewhat noisy, therefore I bow my head in humility. I forgot to add my serial in my last comment, so here it is: Darkelf 19.4.B.B.2.12.28.3.1B.2F.119
darkelf 01. May 2011	Hmm, may be a stupid question, but how do I rate a crackme? I don't see any button for that.
HMX0101 Author 01. May 2011	@darkelf: you can rate it in the box called 'Rating' located in the upper-right corner :) Btw, are you going to write a solution? :D
darkelf 01. May 2011	@HMX0101: No I can't rate it. There is nothing like a link or a button in the "Rating"-box. I wouldn't have asked this question else. Well, since I made a working keygen for your crackme, I maybe should write a solution also. It's only the lack of time that hinders me so far.
idid231 01. May 2011	I'm waiting for solution of this crackme :) About "rate button" You need upload at less one solution to see it :)
darkelf 02. May 2011	I just uploaded a solution. Rating is still not possible. That's somewhat ridiculous.
cyclops Moderator 02. May 2011	@darkelf: You will be able to vote when your solution is approved. At lease one approved solution/crackme is required for voting.
darkelf 08. Feb 2012	I'm sooo happy that crackmes.de is finally back. Hurray! Unfortunately, something with the voting system seems to be not working correct. I'm pretty sure I voted the crackme as "good", but under "Solutions" ther it says: "You have rated this crackme as quite nice." Maybe someone with power can check if two variables got mixed up. Again: welome back!!!

HMX0101's Beam

Download beamcrk.zip, 218 kb (password: crackmes.de)
Browse contents of beamcrk.zip

Beam by HMX0101

Just get a valid key pair, for your hardware id...
and make a nice keygen and tutorial...

The rules as always:

- Don't patch
- Make a keygen (!)
- Write a tut

Greetz: lord_phoenix, Ox87k, Ank83, l0calh0st, n00b, cyclops, starzboy,
crosys, Guetta, anorganix and crackmes.de, ARTeam, CracksLatinos members

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 02. Mar, 2008
Downloads: 761

Rating

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Solutions

Solution by Crosys, published 06. mar, 2008; download (426 kb), password: crackmes.de or browse.

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Discussion and comments

Crosys 06. Mar 2008	Another great keygenme, greetings HMX0101.
HMX0101 Author 06. Mar 2008	Many thx, crosys =), good job... you're the best ;) thx for solution! :)

HMX0101's Black Crackme

Download BlackCrackme.zip, 48 kb (password: crackmes.de)
Browse contents of BlackCrackme.zip

===================================
Very easy crackme, this is considerated for me,
as a second part of White Crackme ;)

- Unwrap it manually! or write a unwrapper for thisprotection :)
- Make a keygen
- Write a tutorial :D

Rules:

- Don't patch the serial comparation
or any jump to register it :)

Greets to:

Ox87k, Ank83, l0calh0st, Ricardo Narvaja,
and all members in CracksLatinos, crackmes.de and ARTeam forum.
===================================
Enjoy it!
23/09/2006

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 24. Sep, 2006
Downloads: 708

Rating

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Solutions

Solution by Crosys, published 21. aug, 2007; download (80 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 25. Sep 2006	Unwrap is very simple, but make a keygen needs knowledge that i don't have...
HMX0101 Author 25. Sep 2006	Unwrapping and keygenning is damn easy, if you need help with this, i can help you... but only if you don't understand ;)
kao 26. Sep 2006	Unwrapping is trivial. Correct serial can be sniffed once you understand from what parts it consists. Keygenning would involve ripping sh^tload of Delphi code - not a very interesting task for me.. Summary - nice crackme for newbies. :)
jB_ 26. Sep 2006	kao: keygening it is not hard, once you've figured out the algo. My keygen routine has only 27 lines of C code. No need to rip anything. HMX0101: why don't you code a decent wrapper? This one is even easier than the one you coded for your previous crackme. Nice crackme for beginners.
l0calh0st 26. Sep 2006	Just modified MD5..no need of ripping ;).......Finding the correct serial format was a bit tricky.....Anyway Good job HMX....Looking forward for the next one
HMX0101 Author 26. Sep 2006	@jB: Sorry, i promise for the next a good wrapper :) @kao: You can solve it, without rip nothing :P @l0calh0st: Yes, that's true :D

HMX0101's Bored

Download boredcrypter.zip, 231 kb (password: crackmes.de)
Browse contents of boredcrypter.zip

Bored // HMX0101
24/07/08

I've got "bored" and wrote this crap :)
Your task is to decrypt a message, just
analyzing and reversing (?) the encryption algo ;)

Pretty simple... :D

Rules:
- Don't brute (hey, who knows? :D)
- Write a tut :)
- You must be bored in order to solve it... this is a must! :P

Regards...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 25. Jul, 2008
Downloads: 673

Rating

Waiting for at least 3 votes
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Solutions

Solution by Numernia, published 04. aug, 2008; download (70 kb), password: crackmes.de or browse.

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Discussion and comments

~misunderstood~ 25. Jul 2008	hi, should I vote this as "boring crap" or as "kind boring" when I´m done ;)?
~misunderstood~ 28. Jul 2008	when i press the "encrypt"-button, nothing happens...is that part of the crackme or a bug?
HMX0101 Author 28. Jul 2008	Isn't a bug, is a default behaviour which i've implemented... after you discover how it works, its pretty simple :)
Ox87k 28. Jul 2008	Interesting crackme even if i think level 3 would be more appropriate. Good one HMX0101 ;)
HMX0101 Author 04. Aug 2008	Good job, numernia... nice tutorial :) Keep up the good work ;)
andrewl.us Moderator 05. Aug 2008	Numernia: - how did you first recognize the use of FGInt library? - how did you then identify the individual FGInt functions? - was there a need to watch the instances of the FGInt big numbers change value in memory as they were calculated? if so, how did you do it?
HMX0101 Author 05. Aug 2008	@andrewl.us: if you use IDA + FGInt sigs.. then you'll know how he recognize/identify it ;)
andrewl.us Moderator 05. Aug 2008	Yes I am tired of having to manually compare the disassembly in IDA with Pascal files. Where can I get FGInt sigs? I'd try to make them myself but Flair/Flirt doesn't take *.PAS.
xylitol 06. Aug 2008	nice solution numernia thx

HMX0101's Cockroach

Download cockroach.hmx.zip, 5 kb (password: crackmes.de)
Browse contents of cockroach.hmx.zip

First keygenme coded by me in C ;P
Its overbloated to be my first one haha :D

Only valid solution is: keygen!
Greetz to: Numernia, Encrypto, Till.ch, _pusher_, everlast, and everyone I forgot :)

Powered by: crypto ;p

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 12. Nov, 2009
Downloads: 563

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by Numernia, published 13. jan, 2010; download (63 kb), password: crackmes.de or browse.

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Discussion and comments

als pom 12. Nov 2009	for the name Alexander the serial is rk
fjlj 12. Nov 2009	this is a very odd keygenme... it sometimes crashes, sometimes just closes, othertimes does a pause and then closes... and then you could also possibly get the good message and a pause lol... pretty sure their is a buffer overflow going on somewhere.. i didnt dig into it too far but it is rather odd.
jspedros 12. Nov 2009	00401A8F -> Sometimes dividing by zero.
HMX0101 Author 12. Nov 2009	@als_pom: that's not a valid serial, since serial must be length > 3 :) @fjlj: I think it will crash if you don't input in the right way :) @jspedros: same for you, you must analyze the format of the serial... I don't check for everything, because i'll leave that to the imagination of the cracker (I guess some things aren't need to be checked, because there are obvious ;p). And don't blame me, its my first real coding in C ;d
Skandal87 27. Nov 2009	Hmm i think i solved this..but i dont know if i am right, pmed you HMX0101.
HMX0101 Author 27. Nov 2009	I didn't received any pm :/ If you solved it without patching and without bruting, nice.. then its fine :)

HMX0101's Crappy Fun

Download CrappyFun-hmx.zip, 180 kb (password: crackmes.de)
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Crappy Fun - by HMX0101

The name says it all :)... just a piece of crap to entertain you!
this crackme isn't intended for totally newbies, you must have
at least some knowledge ;)

There exists two tasks to do:

- Make a valid unpacked (it will not run until you find
why it don't! :))
- Find the correct serial (easy, huh?)

The rules as always:

- Don't patch
- Write a tut

Greetz: lord_phoenix, Ox87k, Ank83, l0calh0st, n00b, cyclops, starzboy,
crosys, Guetta, anorganix and crackmes.de, ARTeam, CracksLatinos members

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 28. Jun, 2008
Downloads: 738

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by TiedInBronzeChains, published 25. aug, 2008; download (198 kb), password: crackmes.de or browse.

TiedInBronzeChains has rated this crackme as awesome.

Solution by zairon, published 03. jul, 2008; download (5 kb), password: crackmes.de or browse.

zairon has rated this crackme as quite nice.

Solution by jE!, published 03. jul, 2008; download (4 kb), password: crackmes.de or browse.

jE! has rated this crackme as nothing special.

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Discussion and comments

DigitalAcid 28. Jun 2008	The patching only applies to the serial, right ? Ps: got a working unpacked file. Some nice little tricks there. I hate IAT destroying/repairing =).
HMX0101 Author 28. Jun 2008	@DigitalAcid: yep only applies to the serial :) Good job on unpacking ;P.. the harder is getting the serial, you'll probably get confused and leave it ;) If you need any hints, just ask me... :D
DigitalAcid 28. Jun 2008	Yeah, the serial algo is pretty long and confusing idd O.o. Trying to figure out what's happening...
BeatriX 28. Jun 2008	Avast! antivirus tells the file contains "Win32:Pakes-AJD [Trojan]".
HMX0101 Author 28. Jun 2008	Crappy AV :PP.. it doesnt contains any malicious code ;) it detect as a virus because its packed... forget about virus alert for this one :D and good luck for everyone which its trying it :)
Ox87k 28. Jun 2008	The crackme doesn't run on my machine, is it normal? I have XP SP3.
DigitalAcid 28. Jun 2008	@Ox87k: It doesn't run untill it is unpacked. I found 2 serials that bypass the first check (there are 6), but I only found them by trial and error. I'm still trying to figure out how a valid serial can be created =).
Ox87k 28. Jun 2008	@DigitalAcid: Thanks, i thought it isn't working because some error or something like that. ;)
Crosys 30. Jun 2008	nice one hmx :)
HMX0101 Author 30. Jun 2008	@Crosys: thanx mate.. :) long time without see you :D I forget to include in the readme... don't bruteforce it ;) there's a way to solve it without brute... :)
kao 30. Jun 2008	I solved it in the "proper" way but seems that bruteforce would be the easiest way. :) If no one writes tutorial this week, maybe I'll do that - this crackme deserves it. :D Thanks for really nice crackme!
HMX0101 Author 30. Jun 2008	Damn.. it was solved too fast :PP good job, kao ;) and thx for cracking this piece of crap :) hope you've enjoyed it! :)
DigitalAcid 01. Jul 2008	If you think you made a piece of crap, I don't want to see your normal Crackme's =P.
HMX0101 Author 01. Jul 2008	Hehe... all my crackmes are easy, just need the right knowledge ;)
HMX0101 Author 03. Jul 2008	Good job guys! :) This crackme was defeated so fast :P (damn, i need some more harder :D)... I really liked Zairon solution... ;) And jE, you can't just solve a simple 6x6 equation system? lol... its not necessary to brute... but well... Thanx for owning this crap :)
jE! 04. Jul 2008	No, can't bcoz don't know what is it! NO MORE MATH! NO MORE MATH! NO MORE MATH! :)
jE! 04. Jul 2008	BTW, say me: at least, that pussy protection is done by you!?
DigitalAcid 04. Jul 2008	Very nice solution, zairon. Nopping the jmp to get a working unpacked file is exactly what I did. It would have been too much work to fix it manually, so I searched a faster, easier way :).
andrewl.us Moderator 04. Jul 2008	Nice to see another WinDBG'er :)
lgtngstk 25. Aug 2008	I'm new at this and am finding this sorta difficult, but I just can't resist.
HMX0101 Author 26. Aug 2008	Well done, TiedInBronzeChains! Nice sol :)
TiedInBronzeChains 08. Sep 2008	Thanks for the nice words! I think that a good solution is a the best way to show that you completely solved the crackme :)

HMX0101's CryptoKeygenme #1

Download cryptokeygenme#1.zip, 37 kb (password: crackmes.de)
Browse contents of cryptokeygenme#1.zip

===========================
HMX0101's CryptoKeygenme #1
===========================

This is my new crackme with a crypto-algo not so hard and easy
antidebugging tricks, this time is not for newbies.

To beat this crackme, you need:

- Analyze the algo
- Make a keygen
- Write a tutorial

Rules:

- Patching is not allowed.

==========
Greets to:
==========

Linden, _khAttAm_, l0calh0st, Ox87k, Ank83, TWiST, dila, moofy, ScR1pT_,
KLiZMA, Kerberos, R.E.M, CracksLatinos, and all members in crackmes.de

===============
Regards,
HMX0101 / R.E.M
===============

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 18. Apr, 2006
Downloads: 684

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

Ox87k 13. Apr 2006	the serial is very very big!! but... I don't understand which crypto have u used... is only md5?
HMX0101 Author 13. Apr 2006	Yes, it uses MD5 but also uses another crypto + some maths...
m@rio_crk 16. Apr 2006	so what can I make to run it, or do you have to compile it again, so that people form non english os can run it normally, because patching isn't the way out :/
HMX0101 Author 16. Apr 2006	i going to resubmit the crackme...
pdrill 20. Apr 2006	Hi, Wonder if this is a bug but try name: Stanley and key 209x"F" , like FFFFFFFFF,,,,
indomit 21. Apr 2006	heh.. cool... name: indomit serilal: FFF...FFF (210 and more times "F") lol ;D

HMX0101's DecryptMe #1

Download Decryptme#1.zip, 12 kb (password: crackmes.de)
Browse contents of Decryptme#1.zip

======================
HMX0101's DecryptMe #1
======================

This is my new crackme with a
simple xor encrypted message.

To beat this crackme, you need:

- Analyze the algo
- Reverse the algo
- Decrypt the goodboy message.
- Write a tutorial

Rules:

- Patching is not allowed.

==========
Greets to:
==========

Linden, _khAttAm_, l0calh0st, Ox87k, Ank83, TWiST, dila, moofy, ScR1pT_,
KLiZMA, Kerberos, R.E.M, CracksLatinos, and all members in crackmes.de

===============
Regards,
HMX0101 / R.E.M
===============

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 20. Apr, 2006
Downloads: 1032

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by baderj, published 18. nov, 2014; download (97 kb), password: crackmes.de or browse.

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Discussion and comments

Jailani 13. May 2006	Is this patched
Jailani 13. May 2006	sorry i mean packed
HMX0101 Author 13. May 2006	only that you need to solve is reverse the algo and test many keys...
indomit 15. May 2006	Hm... I test many keys, but better mgs was: Well''Done''à¿ˆ''Congratulations'''''' for keys: 276798 452798 and others...
HMX0101 Author 15. May 2006	The correct key can decrypt the message correctly...
Zaphod 20. May 2006	55678, 455678, 24455678 and others generate "Well done!, Congratulations!!!" , but I can't say I have solved the crackme :(
HMX0101 Author 20. May 2006	@Zaphod: Exists more than a key to decrypt the message! If you can, write the solution :D
Zaphod 21. May 2006	I'm not sure I understand - do you mean that the message isn't just "Well done!, Congratulations!!!", there is more?
Ox87k 21. May 2006	is maybe "Well done!! Congratulations!!!"?
HMX0101 Author 21. May 2006	@Zaphod and Ox87k: The message is "Well done!!, Congratulations!!!", but you can decrypt it with different keys.
Jailani 23. May 2006	No HMX the msg is "Well done!, Congratulations!!!" not what u said becuz the length of the msg always generated is 30 u know what i mean. The programme defines the length of the string before putting it on to the memory if i am not wrong :D I am onto it...
indomit 24. May 2006	HMX0101, look at this plz: http://rapidshare.de/files/21244087/msgwindow.png.html I see that for all keys showed by Zaphod. It is bug? or what?
HMX0101 Author 25. May 2006	the program only works with english and spanish (my ssytem) character set.
AssemblyJammer69 15. Jul 2012	Easy one, here is a working key:126, the rest of the keys are increments of 128 using 126 as the starting number.

HMX0101's DOOM Keygenme

Download doomkeygenme.zip, 292 kb (password: crackmes.de)
Browse contents of doomkeygenme.zip

Rules are simple, make a keygen for this wicked keygenme :)
No patch, after you analyse it.. you may probably ask, if you miss something or I am crazy?.
I'm not crazy, you missed something, yea! :)

Greets fly out to: Numernia, Encrypto, Cyclops, pusher, everlast, Till.ch and all my other friends I forgot ;P

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 26. Aug, 2009
Downloads: 871

Rating

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Solutions

Solution by redoC, published 05. nov, 2012; download (585 kb), password: crackmes.de or browse.

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Discussion and comments

kao 25. Aug 2009	This is the earliest source for Win32.Induc virus I was able to locate. @HMX0101: any ideas where you got it? Or virus was a part of the challenge? ;)
cyclops Moderator 25. Aug 2009	Oops. Seems like it is Induc, the one which infects Delphi Compiler, and modifies the stub. Lets wait until HMX updates :)
HMX0101 Author 27. Aug 2009	Updated!.. I don't know how I got this virus.. but, now its fixed, enjoy it!.. And hope it could be solved now which is "virus-free" haha ;)
Zuma555 31. Aug 2009	I shall give this a try... i was kinda bored today :)
_pusher_ 05. Sep 2009	What was the date for the file ? :) HMX0101 Author of Induc... joking ;)
cyclops Moderator 07. Sep 2009	If I remember correctly, it was late JAN 2009. Induc was famous by early AUG, pretty old infection, indeed.
redoC 08. Oct 2012	new version uploaded? because ratio is still 21/43 on virustotal.com ... ???
HMX0101 Author 08. Oct 2012	IIRC I put some junk code which AV may detect keygenme as a virus.
redoC 30. Oct 2012	.....test...... can't post comment!
redoC 30. Oct 2012	I already pass Serial test but need help with Activation code. Maybe it's trivial but can't find it. Here is algo. Input numbers are ActNum1 and ActNum2: N = EB56660B454CD2AD3E08749550EA70E1DE3D445962F157184BA3C5EB1E986CE90068AA8AD691EA8182B87D79F4156FFC1E1114C88E4A370D5AED2C2009DE924F BigNum1 = E6654F628B1022EEBB36455E2B9A975E9ED67432749B8C9BE11378FDF75DEC26CE840E7F71182645BA156E50A84BE8057286CB56EFDD52BADC951AEF482A50DC BigNum2 = 7402150D082ADE34CDFF9BB2D053C731DCCC46A97207036510E7D2FA48348B747A2903D79AF39BF0E7D6E19A868B94D3EED03C0B5572711EC3B8D70730254A3C RSA1 = pow (BigNum1, ActNum2) mod N RSA2 = pow (BigNum2, ActNum1) mod N mul_val = (RSA1 * RSA2) mod N md5_val = MD5 (strcat(UserName,SerialNum)) final condition: md5_val + mul_val == ActNum1 SOME HINTS: - modulus N is a prime - this number is initialized but not used: C593BED83AEFB703F775EC8798FF398CF31FEDFF ... it can be used as one of the exponent - I also find this 'secret' string: "X=33008243F89B52F94BD1FBE5C18062CF71BCD6AB, Wow you found my priv. key.. now what's next? ;)"
Dcoder 01. Nov 2012	This is a custom signature scheme, as far as I can tell. Here's what's going on: p = N g = Bignum1 y = g^X = Bignum2 n = C593BED83AEFB703F775EC8798FF398CF31FEDFF = order of g The scheme verifies that g^a y^b + H(m) = b. This is equal to g^(a + bx) = b - H. To generate valid serials, you can: - Set b = H(m) + 1 - Set a = n - (bx mod n) Note how b - H(m) is now 1, and so is g^(n - bx + bx (mod n)) = g^n = 1.
redoC 01. Nov 2012	Dcoder your descriptin is too vague. Did you test your scheme and it works? - In line "Set a = n - (b*x mod n)" ...how to get x ? - Secret private key 33008243F89B52F94BD1FBE5C18062CF71BCD6AB is not used?
tomkol 01. Nov 2012	To get x you need to calculate modular inverse (x=b^-1 mod n). You can use for it extended euclidian algorithm.
redoC 02. Nov 2012	Yes, I got it! "And now we are all doomed!"
HMX0101 Author 05. Nov 2012	Hey redoC, nice sol! and Dcoder good explanation :)) Btw, this was the crypto used: http://en.wikipedia.org/wiki/Schnorr_signature Keep the good work! :)

HMX0101's HMX0101's Crackme #1

Download CRACKME1.zip, 152 kb (password: crackmes.de)
Browse contents of CRACKME1.zip

This is my first crackme, is very easy,
you don't run my crackme because this is
packed :)

HMX0101 -> hmx0101@hotmail.com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 26. Sep, 2005
Downloads: 1452

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by NoRG, published 29. sep, 2005; download (156 kb), password: crackmes.de or browse.

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Solution by deroko, published 29. sep, 2005; download (196 kb), password: crackmes.de or browse.

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Discussion and comments

elfz 27. Sep 2005	Crashes under XP SP2.
deroko 27. Sep 2005	but it works under win2k =) nm, submitted self-keygen, I don't have any compiler at win2k...
HMX0101 Author 27. Sep 2005	the crackme has created in Delphi 7 under XP SP2, crash because this is a trick, try to unpack first, :-)
giga 14. Oct 2005	This Crackme do not work under winXP SP2 or my windows need to restart :)

HMX0101's HMX0101's Crackme #2

Download hmx0101crackme#2.zip, 8 kb (password: crackmes.de)
Browse contents of hmx0101crackme#2.zip

This is my second crackme,
its a simple password protection

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 12. Oct, 2005
Downloads: 1165

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Solutions

Solution by D4ph1, published 15. oct, 2005; download (3 kb), password: crackmes.de or browse.

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Solution by bigboss1988, published 13. oct, 2005; download (9 kb), password: crackmes.de or browse.

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Solution by NoRG, published 15. oct, 2005; download (946 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

bigboss1988 13. Oct 2005	first solution :) i make a patch ?
HMX0101 Author 13. Oct 2005	try to view with a hexadecimal editor :)
D4ph1 13. Oct 2005	I upload the solution...no patching just Olly ;)
bigboss1988 13. Oct 2005	HMX0101 but... it's very easy to patching try to make OEP protection it's increase harder to crack ;)
Shism 13. Oct 2005	free pascal 0.99 ??
HMX0101 Author 13. Oct 2005	i have used freepascal 1.0.2
liunight111 14. Oct 2005	what's password? i think ican't get password by my keyboard!!
HMX0101 Author 15. Oct 2005	D4ph1 and NoRG your solutions are excellent

HMX0101's HMX0101's Crackme #3

Download hmx0101crackme#3.zip, 86 kb (password: crackmes.de)
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This is my third crackme,
its very easy (i think!).

The rules are:
- NO PATCHING !!!
- NO SELFKEYGENNING !!!

The goals are:
- Remove the nag !!!
- Make a keygen
- Write a tutorial

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 20. Oct, 2005
Downloads: 1674

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Solutions

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Discussion and comments

costy 16. Jul 2008	Could someone suggest a good debugger for 16 bit applications?
DigitalAcid 17. Jul 2008	IDA ? :P Or maybe try Turbo Debugger or so, but don't ask me how to work with them...
xylitol 17. Jul 2008	HMX0101: "its very easy (i think!)." Downloads: 1203
xylitol 17. Jul 2008	Solutions There are no solutions to this crackme yet. ahah
zairon Moderator 17. Jul 2008	This crackme is pretty easy. Valid debuggers are TurboDebugger and Dldr (it's inside Softice pack). However you can just use Ida; if you know how Delphi works (call parameters...) static analysis will give you some nice info about the protection routine. If you don't have a 16bit debugger you can try converting the protection routine from 16 to 32 bit (I haven't tried but it probably works). good luck...
costy 17. Jul 2008	Thanks for your suggestion DigitalAcid. And thank to zairon for his explaination :-) I will try. I never tried to debug a 16 bit application I hope it's not so difficult.
costy 17. Jul 2008	Nothing to do. I gave up.
HMX0101 Author 17. Jul 2008	@costy: you just need the right tools... a disassembler such as WinDasm or IDA and a Hex-editor ;) @xylitol: its easy indeed.. it got solved some weeks ago after publishing it ;) btw, since i lost my keygen sources.. i'll recover them by reversing my own crackme.. a total loooool for me :D
costy 17. Jul 2008	WinDsm alone can't help. I tried turbo debugger but it crash. I haven't softice and ida. And it should be really difficult. The crackme is 3 years old and it's still unsolved.
HMX0101 Author 17. Jul 2008	I'm working right now with WinDasm, IDA and Hex Workshop... and i've removed the nag and right now i'm analyzing the routine with IDA :)
costy 18. Jul 2008	the nag is easy to remove just nop some byte but turbo debugger doesn't work for me and i without a debugger is hard
DigitalAcid 18. Jul 2008	IDA is great, but I can't work with it. It is supposed to have some sort of debugger and graphic stuff and so on, but I can't find that or it doesn't work =).
TiGa 18. Jul 2008	The debugger isn't functional for 16-bit programs.

HMX0101's HMX0101's Crackme #4

Download hmx0101crackme#4.zip, 155 kb (password: crackmes.de)
Browse contents of hmx0101crackme#4.zip

This is my 4th Crackme,
the goals are:
-eliminate all protections
-make a keygen
-write a tutorial

the rules are:
-patch ONLY the protections

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 23. Nov, 2005
Downloads: 1125

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Solutions

Solution by Zaphod, published 16. dec, 2005; download (396 kb), password: crackmes.de or browse.

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HMX0101's HMX0101's Crackme #5

Download hmx0101crackme#5.zip, 48 kb (password: crackmes.de)
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My fifth crackme,
try to pass all the tests,
its very easy to get the goodboy message.

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 02. Dec, 2005
Downloads: 1515

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Solutions

Solution by ByteCaper, published 04. dec, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by anorganix, published 04. dec, 2005; download (98 kb), password: crackmes.de or browse.

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HMX0101 Author 09. Dec 2005	try my new challenge {:)>
deroko 09. Dec 2005	I've tried it and coded loader to get good keyfile instead of coding keyfilegen. anyway I think it is more like 2 instead of 3 =) regards
HMX0101 Author 12. Dec 2005	i need more solutions for this crackme :)

HMX0101's Junky #1

Download junky#1.zip, 11 kb (password: crackmes.de)
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==================
HMX0101's Junky #1
==================

This my new crackme with a
simple password protection
and packed with UPX.

To beat this crackme, you need:

- Unpack it!
- Find the correct passwords.
- Write a tutorial

Rules:

- Patching is not allowed!

==========
Greets to:
==========

ScR1pT_, Ank83, KLiZMA, Kerberos, R.E.M,
CracksLatinos, and all members in crackmes.de

===============
Regards,
HMX0101 / R.E.M
===============

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 09. Mar, 2006
Downloads: 1301

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by l0calh0st, published 14. mar, 2006; download (24 kb), password: crackmes.de or browse.

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Solution by Ank83, published 14. mar, 2006; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

Ank83 09. Mar 2006	Hi HMX0101. Try to decrypt this: Mi{Â(j}\|(vqkm(wvm(PU`8989()(Q/u({\|qtt(wzsqvo(wv(SmÂOmvUm(+9()(Vmml({wum(pmtx() :) Best Regards Ank83
HMX0101 Author 09. Mar 2006	It is very easy, to crack this :D only need a known about the encryption :)
Ank83 09. Mar 2006	Did you decrypt the message above ? Use you decryptor !
HMX0101 Author 09. Mar 2006	The message is: Easy but nice Thanks for the message!
l0calh0st 10. Mar 2006	hey HMX0101..That was great!;) thanks
sarkar112 11. Mar 2006	HMX, can you explain how you decrypted it? :)
HMX0101 Author 11. Mar 2006	This is more easy than the XOR encryption :)
l0calh0st 11. Mar 2006	Just subtract 8 from ascii of the password characters :)
m00k00 19. Mar 2006	Hey Ank83, is your real name Kiro? I guess you let your name in your Crypter/Decrypter for this keygenme ;) Anyways: Nice stuff HMX0101! Does someone have a special tutorial about cracking delphi appz? luv ya all :D
HMX0101 Author 19. Mar 2006	Thank you for all newbies that can try my crackmes! because this crackmes is specially for newbies :D
Ank83 19. Mar 2006	Hi m00k00. My real name is Vladimir. You have the crypter and decrypter in my solution so copy paste the crypted message and you will see what it says. Regards Ank83
m00k00 19. Mar 2006	Nevermind, just wanted to pin-point you at this: C:\Documents and Settings\Kiro Gligorov\Desktop\... ;) Anyways, keep up the great work all :thumbsup: :)

HMX0101's Keygenme #1

Download keygenme#1.zip, 14 kb (password: crackmes.de)
Browse contents of keygenme#1.zip

=====================
HMX0101's Keygenme #1
=====================

This is my new crackme, with an "easy"
serial calculation using my algorithm
"XConst" (this algo make up to 0x42FE chars),
with some junk code and packed with
UPX and scrambled with UPolyX v0.5

To beat this crackme, you need:

- Unpack it!
- Find the way to enable the "Check" button
- Find the way to enable the 2nd textbox
- Analyze the algorithm
- Make a keygen
- Write a tutorial

Rules:

- Patching is not allowed!

==========
Greets to:
==========

Ank83, KLiZMA, Kerberos, R.E.M, CracksLatinos,
and all members in crackmes.de

===============
Regards,
HMX0101 / R.E.M
===============

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 28. Feb, 2006
Downloads: 971

Rating

Votes: 6
Crackme is quite nice.

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Solutions

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Discussion and comments

l0calh0st 02. Mar 2006	Unpacked the file..but how to enable the button and txtbox:(
HMX0101 Author 02. Mar 2006	some methods can be used: 1. make a program to enable the button and the textbox 2. enable in memory others methods can be used too.
Ank83 05. Mar 2006	Hi I need some help for unpacking the file. Thanks Best Regards Ank83
HMX0101 Author 05. Mar 2006	See this: http://community.reverse-engineering.net/viewtopic.php?t=3781&sid=fa7eb7e4b6b4a56d425f3c9d5298c962 Maybe can help you XD
l0calh0st 05. Mar 2006	When you load te keygen..put breakpoint on RETN and then F8 and then CTRL-A to analyse..you are in upx code..use the generic method for upx b putting breakpoint at jump after popad
Ank83 05. Mar 2006	l0calh0st thanks man. i read the upoly 0.5 unpacking and always f*** me up. I thought my OS is bad, I was going to reinstall it. :) Thanks again. Regards Ank83
Ank83 05. Mar 2006	l0calh0st if you haven't find a way to enable the buttons here is a hint: when the app push 58 it is diable, and 50 is enable. Example: PUSH 58000000 -> disable, 50000000 -> enable. Find where the app create the buttons and above them there is the push.
l0calh0st 06. Mar 2006	i have found it thanks
Ank83 06. Mar 2006	1 hour till i found the right place where the seral is being created. Nice. :)
HMX0101 Author 06. Mar 2006	the junk code is cool XD this make it a little bit difficult :D
acidflash 07. Mar 2006	I have internal keygen working... :) Now to analyze more!
acidflash 07. Mar 2006	HMX0101: I know you want a keygen but here is a loader to make keygenme#1.exe into an internal keygen :) (check it out for fun).. Works on original packed executable. http://rapidshare.de/files/14908790/Loader_keygenme_1.rar.html
l0calh0st 07. Mar 2006	nice work acidflash..i don't have any knowledge of loaders..how to make them
HMX0101 Author 07. Mar 2006	acidflash, Thanks for the selfkeygen, this series of keygenmes (keygenme #1 and #2) are very easy in comparation with the next series (keygenme #3 and #4), this keygenmes are a good practice for newbies :D Thank you, to all newbies for try my keygenmes :)
Ank83 08. Mar 2006	I also posted a selfkeygen and a solution. But the moderators rejected it. Only keygen's are accepted. I'm writting a keygen. But I have some part's of the code that I don't uderstand. I will try to figure it out. Regards Ank83
l0calh0st 11. Mar 2006	Very difficult ...what's that sea of code generated... :( Self keygen was easy..but keygenning..it seems very difficult..give some hint
D3z+ 19. Apr 2006	HI there, to enable the button and the edit box i need to patch the code, but it seems that is forbidden by rules. There's a secret way to do it without patching? :) I saw your key gen, really interesting.
HMX0101 Author 19. Apr 2006	patching the button and the edit box is allowed, but the serial checking is not allowed!
TDC[NL] 24. Apr 2006	asdfasdfsdaf HMX-5FD893BF1C2C0B8E1B2BD55FF7B84ABF ;) now trying 2 keygen
TDC[NL] 24. Apr 2006	hmm i can let my keygen generate the bigass part that's used to generate part of serial but not the real part... that part of algo is so full of calls and stuff, hehe pretty good crackme mate
cobrasniper555 23. Aug 2006	Just wondering, from what you said HMX0101, how do you make a program that fixes another program in C++/C? By the way, this keygenme was awesome, took me like all night to do, lol. Thanks for the keygenme man!
HMX0101 Author 23. Aug 2006	I'm referred to a loader ;) Search in google about this, you can make keygen/loader to solve it :P

HMX0101's Keygenme #10

Download Keygenme#10.zip, 38 kb (password: crackmes.de)
Browse contents of Keygenme#10.zip

Another crypto-keygenme from me :p
This time is a little bit easy... if you know some things ;)

Solution = Tutorial + Keygen

Rules:

- Don't patch!!!

Greets to:
Ox87k, l0calh0st, Ank83, lord_phoenix, x15or, BugHunter,
and all people from crackmes.de, ARTEAM and iNFLUENCE forum...

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 22. Nov, 2006
Downloads: 871

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Solutions

Solution by Crosys, published 01. jul, 2007; download (140 kb), password: crackmes.de or browse.

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Discussion and comments

Crosys 22. Nov 2006	Crashes on my pc.
Ox87k 22. Nov 2006	It crashes for u 'coz maybe the serial's lenght is wrong....... :)
HMX0101 Author 22. Nov 2006	Yeah... Ox87k is right ;)
geeko 23. Nov 2006	must the key be exactly 17 chars or bigger?
HMX0101 Author 23. Nov 2006	Serial must be > 32 chars ;)
astigmata 26. Nov 2006	1991 2006 Is it your birth's year ? (1991) I think because there wasn't many computers in 91
Crosys 26. Nov 2006	Its keys for TEA....
HMX0101 Author 26. Nov 2006	@astigmata: LOL!, Its only the keys ;)

HMX0101's Keygenme 11 - Christmas

Download Keygenme11.zip, 79 kb (password: crackmes.de)
Browse contents of Keygenme11.zip

Special christmas crackme... very easy...
Try to make a keygen for this one and...
don't patch !!!!!!

NOTE: is this another crypto crackme?
yeah :P

Greets to:
Ox87k, l0calh0st, Ank83, cyclops, lord_phoenix, x15or, BugHunter,
and all people from crackmes.de, ARTEAM and iNFLUENCE forum...

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 03. Jan, 2007
Downloads: 792

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Solutions

Solution by Crosys, published 04. jan, 2007; download (334 kb), password: crackmes.de or browse.

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Discussion and comments

l0calh0st 03. Jan 2007	Yeap..it's easier :P
HMX0101 Author 03. Jan 2007	Yes... very easy... that's my intention because this is for newbie/intermediate people :)

HMX0101's Keygenme #2

Download keygenme#2.zip, 24 kb (password: crackmes.de)
Browse contents of keygenme#2.zip

=====================
HMX0101's Keygenme #2
=====================

This is my new crackme, it is packed
with FSG 2.0, this time two serials
to be fished for each name.

To beat this crackme, you need:

- Unpack it!
- Analyze the algorithm
- Find the 2 codes for each name
- Make a keygen
- Write a tutorial

Rules:

- Patching is not allowed!

==========
Greets to:
==========

Ank83, KLiZMA, Kerberos, R.E.M, CracksLatinos,
and all members in crackmes.de

===============
Regards,
HMX0101 / R.E.M
===============

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 28. Feb, 2006
Downloads: 833

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Solutions

Solution by Ank83, published 06. mar, 2006; download (53 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 28. Feb 2006	absolutely g00d work but the algo routine is amazing long :\|
HMX0101 Author 28. Feb 2006	Thank you, the routine not is long ;)
Ank83 03. Mar 2006	Hi. I just started working on this crackme. It's a nice one. You got two serials STD and PRO. I look at the standard code only. You start with STD- then take the name convert in ASC numbers, then some math, then add -HMX, and at the end remove "," from final serial. I can easy make a selfkeygen, but i will try keygen. The math is a litte bit long but it's not hard (for the STD). Nice work HMX0101. Best Regards Ank83
HMX0101 Author 03. Mar 2006	Thank you, for try this keygenme, the serial is very simple (addition, substraction, multiplication, etc), in conclusion very easy. and... you have tell much hints XD
HMX0101 Author 03. Mar 2006	The idea of the keygenme is known the basic of the FPU functions (addition, substraction, multiplication, etc), for this i need that can do the possible and make a keygen, if you can't, make a selfkeygen :D
l0calh0st 03. Mar 2006	i can't get olly to break :( Which api to use
HMX0101 Author 03. Mar 2006	some secrets can be analyzed correctly...
Ank83 04. Mar 2006	hmm... I almost missed it ! The serial is time changing. :) You can delete my post's. Regards Ank83
Ank83 04. Mar 2006	l0calh0st - forget about itermodular calls, referenced string e.t.c. do i manually. Find where the app starts creating it self and then follow.
HMX0101 Author 04. Mar 2006	that is a good idea to crack this XD
l0calh0st 05. Mar 2006	Ok found serial but kegen algo is very long
HMX0101 Author 06. Mar 2006	Ank83, thanks for the gfx and the greeting :D
Ank83 06. Mar 2006	Hi, HMX0101 How are u ? Are u always here ? Did you ever sleep ? :) I start writing a keygen and I thought i wrote it but then pop up the time changing procedure and I got pis**d so I wrote and selfkeygen. Best Regards Ank83

HMX0101's Keygenme #3

Download keygenme#3.zip, 150 kb (password: crackmes.de)
Browse contents of keygenme#3.zip

=====================
HMX0101's Keygenme #3
=====================

This is my new crackme with easy antidebugging
tricks and medium hashing routine specially
for intermediate crackers with a lame serial
checking.

To beat this crackme, you need:

- Analyze the algo
- Make a keygen
- Write a tutorial

Rules:

- Patching is not allowed.

==========
Greets to:
==========

TWiST, dila, moofy, ScR1pT_, Ank83, KLiZMA, Kerberos,
R.E.M, CracksLatinos, and all members in crackmes.de

===============
Regards,
HMX0101 / R.E.M
===============

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 05. Apr, 2006
Downloads: 756

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by DiKeN, published 07. apr, 2006; download (163 kb), password: crackmes.de or browse.

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Discussion and comments

l0calh0st 05. Apr 2006	Nice work HMX0101
HMX0101 Author 05. Apr 2006	Thank you, the crackme is VERY VERY EASY :)
l0calh0st 05. Apr 2006	Debugger check can be easily removed....Serial fishing is easy...but algo seems long for kegenning
TWiST 07. Apr 2006	Thanks nice work HMX0101 . I hope I'll learn some keygenning from it :-). Nice work!

HMX0101's Keygenme #4

Download keygenme#4.zip, 149 kb (password: crackmes.de)
Browse contents of keygenme#4.zip

=====================
HMX0101's Keygenme #4
=====================

This is my new crackme with easy antidebugging
tricks and easy hashing routine specially
for newbie crackers with my improved technique
to check the serials.

To beat this crackme, you need:

- Analyze the algo
- Make a keygen
- Write a tutorial

Rules:

- Patching is not allowed.

==========
Greets to:
==========

TWiST, dila, moofy, ScR1pT_, Ank83, KLiZMA, Kerberos,
R.E.M, CracksLatinos, and all members in crackmes.de

===============
Regards,
HMX0101 / R.E.M
===============

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 08. Apr, 2006
Downloads: 869

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Solutions

Solution by ultrasound, published 09. apr, 2006; download (168 kb), password: crackmes.de or browse.

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HMX0101's Keygenme #5

Download keygenme#5.zip, 30 kb (password: crackmes.de)
Browse contents of keygenme#5.zip

=====================
HMX0101's Keygenme #5
=====================

This is my new crackme, with a couples
of antidebugging tricks and crypto-modified
plus a special trick.

To beat this crackme, you need:

- Analyze the algo
- Remove the timer
- Make a keygen
- Write a tutorial

Rules:

- Patching the goodboy jump not allowed.

==========
Greets to:
==========

Shub-Nigurrath, Taliesin, monkey, TDC, Linden,
_khAttAm_, l0calh0st, Ox87k, Ank83, TWiST, dila,
moofy, ScR1pT_, KLiZMA, Kerberos, R.E.M,
CracksLatinos, and all members in crackmes.de

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 19. May, 2006
Downloads: 654

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Solutions

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Discussion and comments

HMX0101 Author 26. May 2006	Nothing can't crack this?, i think its very easy :D if somebody need hints, maybe i can help...
Ank83 26. May 2006	Hi HMX0101. How are u ? It was a while since a cracked something, and this one looks difficult to me, but I will try it. So my question is: Can this crackme load in Olly ? Best Regards Ank83
HMX0101 Author 26. May 2006	Yes, check the crackme using a PE Editor :D
Ank83 26. May 2006	I just don't see what to change ! Need some help ! Regards Ank83
l0calh0st 26. May 2006	Ank83 ...you only need to change the "no. of RVA and sizes"...Mostly it should be 10
Ank83 26. May 2006	yeap it working... thank l0calh0st it's nice to see you all, again.
bundy 06. Jun 2006	First some code fragment with my comments. I apologize if it gets wrong formated. 003D4FE6 mov esi,003D6100 ; some sort of crc table ...... 003D5011 \|shr ecx,14 ; get high 12 !!! bites 003D5014 \|mov ecx,[dword esi+ecx4] ; access AWAY!! of the crc table ...... 003D5033 \|shr edx,19 ; 7 bites ?!? 003D5036 \|mov edx,[dword esi+edx4] ; crc table not fully used :( 003D5039 \|shl ebx,15 ; this could be accepted ...... 003D5049 mov eax,80 003D504E /mov edx,ebx 003D5050 \|shr edx,18 ; corretly in my point of view - 8 bites left 003D5053 \|mov edx,[dword esi+edx*4] 003D5056 \|shl ebx,13 003D5059 \|xor edx,ebx 003D505B \|mov ecx,[local.1] ; remember 80h <= eax < 101h 003D505E \|movzx ecx,[byte ecx+eax-2] ; reference to company + eax - 2 - hmm, what's there???? 003D5063 \|xor edx,ecx ; some data on heap 003D5065 \|mov ebx,edx 003D5067 \|inc eax 003D5068 \|cmp eax,101 003D506D \jnz short 003D504E 003D506F mov ecx,[local.2] Well, the main problem the way I see it, is that there is access out of data section. Mostly there is access into .reloc section - if it would be into .code section I would see it as a sort of crc checking, which would be fine with me. The second thing is this access into the heap after company name - do we miss here some modulo? :) I honestly don't think anyone of these fragments is this mentioned "special trick". I would call them "bugs". If I oversaw something or I'm completly wrong give me some hint, on the other side, I would correct this wrong access "behaviour".
HMX0101 Author 06. Jun 2006	The algo used for check the CRC32, can make different hashes, but after a long time... maybe its a bug, but i don't think so. Try to make a keygen, and you see if that points are true...

HMX0101's Keygenme #6

Download keygenme#6.zip, 14 kb (password: crackmes.de)
Browse contents of keygenme#6.zip

=====================
HMX0101's Keygenme #6
=====================

After a long time without write a crackme,
i going to release this easy crackme :P,
with a shit algo, but with some antidebug
tricks :D, SPECIALLY FOR NEWBIES maybe for
the pro crackers this is boring XD

To beat this crackme, you need:

- Make a keygen
- Write a tutorial

Rules:

- Patching the goodboy jump not allowed.
- Selfkeygen, loaders or patches
are not allowed (because the algo is very easy)

==========
Greets to:
==========

btcentral_test, Shub-Nigurrath, Taliesin, monkey, TDC,
Linden, _khAttAm_, l0calh0st, Ox87k, Ank83, TWiST, dila,
moofy, ScR1pT_, KLiZMA, Kerberos, R.E.M, CracksLatinos,
and all members in crackmes.de

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 12. Jul, 2006
Downloads: 649

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Solutions

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Discussion and comments

l0calh0st 12. Jul 2006	Hi HMX Here is my try :P http://l0calh0st.byethost16.com/files/crackmes/Keygen_HMX0101_KeygenME%236.rar
HMX0101 Author 12. Jul 2006	Hi, l0calh0st Too much time without see you!, thanks for the keygen i hope that you like it :P
l0calh0st 12. Jul 2006	The tricks were cool :)....I m buzy these days but visit here ...Solve some problems when get some free time Regards

HMX0101's Keygenme #9

Download Keygenme#9.zip, 34 kb (password: crackmes.de)
Browse contents of Keygenme#9.zip

This time i've prepared a harder crackme...
Somebody without crypto-knowledge, plz don't loose your time ;)

Like other of my crackmes, the only allowed solution,
is a keygen :D

Rules:

- Don't patch!!!

Greets to:
Ox87k, l0calh0st, Ank83, lord_phoenix, BugHunter,
and all people from crackmes.de, ARTEAM and iNFLUENCE forum...

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 07. Nov, 2006
Downloads: 715

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Crosys, published 18. nov, 2006; download (98 kb), password: crackmes.de or browse.

Crosys has rated this crackme as quite nice.

Solution by lord_Phoenix, published 16. nov, 2006; download (56 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 Author 10. Nov 2006	This one is harder... or nobody want to crack it??? I hope this one can be solved...
lord_Phoenix 11. Nov 2006	solved it! gonna write a tute :) nice work, br0!
Crosys 16. Nov 2006	Damnit, you was faster, i solved it but tutorial not done, shall i finish it or maybe not needed now...?
zairon Moderator 16. Nov 2006	x15or, write the tutorial. We'll judge it.
BaKaE 16. Nov 2006	yes x15or write a tut. maybe you found an other way to crack thiz and newbies could learning more, about cracking with different ways. ps: sorry for my grammar
HMX0101 Author 16. Nov 2006	x15or, plz write a tut ;) Congratz, lord_Phoenix nice sol :)
Crosys 17. Nov 2006	Alright, uploaded
HMX0101 Author 18. Nov 2006	Good job, x15or ;)
ProTreeBrain 21. Nov 2006	Do you think, it is impossible to crack it without crypto experiences? For crypto is enough to patch one instruction.
Ox87k 21. Nov 2006	ProTreeBrain: this is a keygenme so it means that u must keygen it and not crack it.

HMX0101's Newbie Challenge #1

Download NC1.zip, 206 kb (password: crackmes.de)
Browse contents of NC1.zip

Newbie Challenge #1 by HMX0101

Again me :)
This time, i'll be making a small series of crackmes
for newcomers to this interesting world :)

This one is easy.. or at least that was my intention..
Sorry if its too hard :P

This series will give you some reversing skills! :)

Prerequisites:
- The cracker needs to know basics of ASM (this is a must!)
- Math knowledge (if you know +,-,* and /, then you've this one! :)
- A bit of Luck.. (well, this isn't hardly required.. but it will help you too :D)
- Be good with girls/boys... optional.. hehe :P

The rules!
- Find the password.. without using bruteforce!
- Don't patch
- DON'T BRUTEFORCE! (its just to make clear :D)

Enjoy!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 15. Aug, 2008
Downloads: 1510

Rating

Votes: 6
Crackme is good.

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Solutions

Solution by SK2K7, published 22. aug, 2008; download (3 kb), password: crackmes.de or browse.

SK2K7 has rated this crackme as awesome.

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Discussion and comments

hackereha 16. Aug 2008	lol it's hard a bit:P i cant find the last char of serial yet but i will:P
Drakenza 16. Aug 2008	It's quite hard :D I reversed the first check very easily, put it in equation form, solved for the 1st char of the S/N, and got it. However, when I input that character, it changes...? As far as I can tell it's related to the call to 453AC8, which I'm looking at and can't for the life of me understand. From pure observation it looks like 15 is added to the 1st char of the S/N, but only in some cases (for some reason a string like "7xx" doesn't get changed). I don't think it's a bug, more likely I'm missing something.
SK2K7 16. Aug 2008	Hehe, nice one HMX0101
hackereha 16. Aug 2008	@Drakenza yea i realized that too it just adds it to letters i think:)
Ramirez 16. Aug 2008	Hmm, i can pass all checks but checksum ...
MACH4 16. Aug 2008	It's not hard! Just been too many rediculously easy ones lately!
Drakenza 16. Aug 2008	@hackereha: yeah, it seems to add 15, but only in some cases :S (I figured out the 1st char and subtracted 15 from it, but when I put that in the serial it doesn't change). I've been stepping through that massive series of calls over and over but I have no idea what it's doing :D
br0ken 16. Aug 2008	Any hints regarding the checksum? I can't seem to get past it :(
w00b 17. Aug 2008	i'm guessing the checksum would have to do with the casing of the letters.. i could be wrong though
Zaphod 18. Aug 2008	It was easy to find the correct serial using some analysis and a little bit of trial and error. But that is not a solution, of course, since any trial and error can be considered bruteforcing. Which is strictly forbidden :) A complete analysis is going to take some time...
w00b 18. Aug 2008	The rules make it tough :) I coded an app to figure out the possibilities but I think that would be brute forcing so I can't submit a solution :)
HMX0101 Author 18. Aug 2008	Damn.. maybe for the next one, i should lower the level a bit :P One question for the people who tried it and still don't get it: Do you think patching or bruteforcing is always the good/only choice? The algo in the crackme is perfectly reverseable, just need to try harder and use the grey-matter in your brain :D I just made this one, because i was sick of see some level1 crackme which don't learn you some reversing skills which you need for harder ones :) Regards!
Drakenza 18. Aug 2008	@HMX0101: No, I think we've just had it too easy for too long ;). I prefer algorithms that are reversible rather than the ones you have to patch or bruteforce (you learn a lot more anyway).
SK2K7 18. Aug 2008	Yes, it is full reversible, it can be solved with pen paper and calculator.
hackereha 21. Aug 2008	so where's your solutions O.o?
SK2K7 21. Aug 2008	Sorry, i never send solutions, but here is a little hint for you: ((39AB xor 12) AND FF) xor FF = 46 => 'F' now depending on case if result is capital or not it chooses an array which is the same as the letters of alphabet letters of your keyboard. Now count from 'Q' till 'F' -start at 0- so it is 13 till 'F' Now take normal alphabet table 'A..Z' start at 1 count 13 and you get first letter of the serial => 'M' Regards
br0ken 21. Aug 2008	Umm, you're making it complicated. ((num XOR 0xFF) XOR 0x12) = 0xAB num = ((0xAB XOR 0x12) XOR 0xFF) = 4D = M
SK2K7 21. Aug 2008	mm, yeah sounds my is a complicated (i was never good at math) But, as long as at the end comes the same result out, who cares ;)
Drakenza 22. Aug 2008	Why do you have to start from A..Z and count 13 rather than start from 'F' and count 13? I guess I read the disassembly incorrectly...
br0ken 22. Aug 2008	num = ((0xAB XOR 0x12) XOR 0xFF) = 46 = F The calculation produces 0x46 = F instead of M (sorry about that!) Cme seems adds/subtracts a certain depending on the letter entered. (trace CALL NC1.00453AC8) A + 22 = W B + 03 = E C + 15 = R D + 8 = L .. M - 7 = F I bruted a little to find out which char produces F. (sorry!) From the above table it's M.
HMX0101 Author 22. Aug 2008	@hint: substitution cipher...:)
SK2K7 22. Aug 2008	HMX0101, pm'd you my Pen and Paper solution ;)
HMX0101 Author 22. Aug 2008	Nice sol, SK2k7 ;) You've submitted it?.. maybe can help some people around there =D
br0ken 22. Aug 2008	woot! Solved it. The pwd has a lot Mass. Hehe ;) Won't submit a soln because i used a little amount of bruting, which of course makes my soln invalid. I'm looking forward to see a soln with 0% bruting.
SK2K7 22. Aug 2008	Yeah, submitted i'll hope it will be accepted ;)
apuromafo 23. Aug 2008	nice work :) @SK2K7 and nice challenge @hmx0101

HMX0101's Newbie Challenge #2

Download NC2.zip, 203 kb (password: crackmes.de)
Browse contents of NC2.zip

Newbie Challenge #2 by HMX0101

The next one in the series!
This time you don't have to do serial fishing :D
You've to do something more interesting!... Keygenning! :)

This one looks more simple and easy than previous one :P
The algo is pretty straightforward, so.. :D

The rules!
- Make a nice keygen... I've one, you're jealous? :)
- Don't patch

Enjoy!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 20. Aug, 2008
Downloads: 715

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Solutions

Solution by user2k, published 05. oct, 2008; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

w00b 23. Aug 2008	I dont know how to get around the first check of 'HasUTF8BOM' .. I read about byte order marks but I still don't quite see what it's looking for
w00b 23. Aug 2008	Nevermind I got passed it :) that took some work!
Zaphod 26. Aug 2008	I found a key that works, but what exactly does a "keygen" mean in this case? There can be almost any number of correct keys, so what is a keygen? Is it a program that shows a lot of keys, or should it in principle show ALL the keys?
HMX0101 Author 26. Aug 2008	If you've found a key that means, which u know there's only 0xFFFFFFFF serials :)... a keygen in this case will show all the possible serials :)
w00b 26. Aug 2008	that's a lot of serials.. i must be missing something O_O that algo looks awfully big
Zaphod 27. Aug 2008	HMX0101: It seems to me there must be a lot more than 0xFFFFFFFF serials. Now I won't reveal too much here, but out of the required number of digits in a key some of them can be anything. And it's all those almost identical keys I'm talking about. Why code a keygen that shows all these keys? The relevant keys are those that depend on four of the digits. The reason I'm bringing this up is that anything we can learn something from is relevant, but if it is just work and more work of the same kind, it is less appealing. It would seem to me that a solution that explains the relevant things should be considered good, but the demand for keygens would often stop people from writing solutions. It's just too much work.
HMX0101 Author 27. Aug 2008	Yea.. i'm concient of that :P If u know how it works, its not hard! Maybe for the last challenge, i should lower the level muuuch... :o
user2k 05. Oct 2008	Nice keygenme. Just uploaded keygen (linux binary+source code[gcc]). Sorry for no solution, just small readme with remarks from work)

HMX0101's Secretme #1

Download secretme#1.zip, 15 kb (password: crackmes.de)
Browse contents of secretme#1.zip

=====================
HMX0101's Secretme #1
=====================

This is my new crackme with a
short algorithm and many tricks
to make your life burning in hell :D

To beat this crackme, you need:

- Unpack it!
- Find the tricks
- Make a keygen
- Write a tutorial

Rules:

- Patching is not allowed!

==========
Greets to:
==========

moofy, ScR1pT_, Ank83, KLiZMA, Kerberos, R.E.M,
CracksLatinos, and all members in crackmes.de

===============
Regards,
HMX0101 / R.E.M
===============

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 15. Mar, 2006
Downloads: 1210

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Solutions

Solution by l0calh0st, published 21. apr, 2006; download (23 kb), password: crackmes.de or browse.

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Discussion and comments

TQN 23. Mar 2006	A interestics crackme ! Is it acceptable to write the keygen with 3 data: secrectme process ID (changing), OllyDbg process ID (changing) and GetComputerName. So, to run the keygen, we need run OllyDbg, run secrectme, generate serial, and serial. Sorry for my bad English ! Regards,
HMX0101 Author 23. Mar 2006	Easy stuff... specially for newbies XD
Fast-call1 31. Mar 2006	Thank u HMX0101 for this nice Keygenme, good tricks to hide important information. ;-)
waganono 01. Apr 2006	Thanks for this challenge But there is 3 JNZ that i dont understand. If i reverse them, the serial is calculated otherwise not.
waganono 01. Apr 2006	It's ok now, it was a part of the tricks... Now i can write the keygen and tut. Thank you for this crackme, tricks are well implemented! Are tou interested ? sorry for bad english but i m french....
HMX0101 Author 21. Apr 2006	l0calh0st, thanks for the solution you are a good cracker :)
l0calh0st 21. Apr 2006	Thanks HMX0101 i have just started learning :)
waganono 26. Apr 2006	I have just finished a keygen for this one. My tutorial is not finished yet, but it will soon... My Keygen use original Secretme version (not patched), and don't need Olly (i emulate it). I hope you will appreciate it. Sorry for my bad english, i'm french
Zaphod 01. May 2006	l0calh0st: a nice and clear tutorial, but isn't nopping out those 6 lines a violation of the rules: No patching? hmx0101: When you type the correct serial there is a message box saying "Good job!, now make a keygen", but it seems that you already have to have made a keygen to obtain the correct serial?
l0calh0st 01. May 2006	Zaphod....patching the good jump or registration scheme is not allowed...you could patch the debuggerchecks....Although if you don't wanna patch then you have to find the Processid of olly and concatenate it with the keygenmes Processid........Maybe HM0101 could clear more abt patching
l0calh0st 01. May 2006	and without noping that jumps the registration code is not generated...and you should patch it to get a valid serial..this is just a little trick that HMX0101 said in the REadme
waganono 02. May 2006	I have sent my tut to moderators, i think i have missed nothing... I have tried the keygen on many computers and it worked great without any patching. Give me your comment please

HMX0101's Secretme #2

Download secretme#2.zip, 12 kb (password: crackmes.de)
Browse contents of secretme#2.zip

=====================
HMX0101's Secretme #2
=====================

This is my new crackme with a
easy algorithm but a little bit long :D

To beat this crackme, you need:

- Unpack it!
- Try to make it works in your computer
- Make a keygen/patch to insert your data
inside the crackme to register the crackme
- Write a tutorial

Rules:

- Patching the goodboy jump is not allowed.

==========
Greets to:
==========

TWiST, dila, moofy, ScR1pT_, Ank83, KLiZMA, Kerberos,
R.E.M, CracksLatinos, and all members in crackmes.de

===============
Regards,
HMX0101 / R.E.M
===============

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 20. Apr, 2006
Downloads: 1127

Rating

Votes: 5
Crackme is good.

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Solutions

Solution by br0ken, published 24. oct, 2007; download (39 kb), password: crackmes.de or browse.

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Discussion and comments

TQN 04. Apr 2006	Easier than Secretme #1, but still hard for newbie like me.
TQN 04. Apr 2006	This crackme will be solved when the computer name is: "HMX0101". Did you test your crackme all another computers when GetComputerNameA -> some functions in strenc.pas -> must be equal with "1075411813". I think the unique key is "HMX0101".
HMX0101 Author 04. Apr 2006	no the key is different for each computername :) example: if you computername is aabbcc the key is 1575118436 the idea is modify the strings in the crackme to show the goodboy message :D
indomit 14. Apr 2006	I solve it. But I only replace string "HMX1011" to name of my computer (of coz I change the length too ;)) in *.exe. I do not change the key, stored in the same place. I think it have another solution: There is a need to replace machine-depend key, and not change computer name. Is that so?
HMX0101 Author 14. Apr 2006	you need to change the computername and the key :)
indomit 15. Apr 2006	For what? %) I trace th prog, and I see that it satisfied by only one check %) it check computername and jump to congratulations %)
indomit 22. Apr 2006	Now another trouble: Are you sure that your prog can be patched for computer with name which length 1 or 2 chars? I mean if (length(ComputerName)<3). I change the name of my comp to "F", patch the prog, and after run, it show exception "divizion by zero". And the same with computer name such as "AC" or "FF". But if length(ComputerName)>2 and <16 it work normal...
BugHunter 24. Apr 2006	Hey HMX0101, is it okay if I put this one up at REM page too?
HMX0101 Author 24. Apr 2006	BugHunter: Sure, you can put in REM page :) indomit: no, it only works with computer name length > 3 :(
l0calh0st 24. Apr 2006	No one has submitted solution ...What do you want in solution...it must be patched(if you don't want to change computer name like me :))....then i can make a keygenerator for finding key for a username...
TDC[NL] 24. Apr 2006	Yeah, finding a key for a specific computername is relatively easy if u spend some time. But if you patch the exe someone who runs the target still has to change his own PC name to the one that's patched inside, so is patching that part allowed HMX0101?
HMX0101 Author 24. Apr 2006	the only that can be patched is the computer name and the key for the computer name inside the crackme :)
BugHunter 24. Apr 2006	So the end user who downloads a solution will have to change his own PC name to see the solution working?
HMX0101 Author 24. Apr 2006	No, you need to make a keygen for generate a serial for your computer name and a patch for change the name/serial inside the crackme...
BugHunter 25. Apr 2006	Yes, and you have to fool the GetComputerName API so after it's called the memory of the crackme will be changed to the right PC name?
DigitalAcid 15. Oct 2007	I patched 1 compare and it said it was registered for my computer name (that same compare also checks the key). I don't think it's a right solution, but it works :). I would call it a "selfpatch" since the crackme is already gathering all the info... => - Make a keygen/patch to insert your data inside the crackme to register the crackme
br0ken 15. Oct 2007	@Digital Acid, I did the exact same thing ;) Algo is HUGE!
br0ken 15. Oct 2007	It's also got custom code for finding computer name. GetComputerNameA doesn't show up in the search.
DigitalAcid 09. Nov 2007	My own patched file doesn't work anymore and I did exactly the same as you before I read your tutorial. Mine used to work though, but it seems it's crashing now because it's trying to divide by zero (ECX == 0). I don't know why... but apparently it thinks my computername is now "0" and i didn't change it at all O.o.
HMX0101 Author 09. Nov 2007	Crackme only works with comp-names bigger than three chars, read previous comments... ;)
DigitalAcid 09. Nov 2007	My computername is 8 characters long...
HMX0101 Author 09. Nov 2007	None algo is perfect, always have problems/bugs... i think a good idea would be make a keygen and check if name can be used to register crackme ;)
br0ken 10. Nov 2007	@DigitalAcid, I (again) tested my solution with computer name* = 7,8 and 14 characters. It worked on all three occasions. I tested my patched file too. It works irrespective of computername* length. Olly didn't raise any exceptions either ;) What seems to be the problem? * = All computernames are assumed > 3 chars.
br0ken 10. Nov 2007	It is quite possible, some computer names may not have a key. As HMX0101 said, maybe serial algo is flawed? Change your computer name and see if it works.
DigitalAcid 10. Nov 2007	But it used to work and now that i try it again, it doesn't work anymore. I don't know what it is, but it's probably my pc again. It's always possible that the algo is buggy of course, but I think that's not the case here. I tried it with another computername now and still the same problem. There are 2 divisons (IDIV ECX) and since ECX is 0, i get an exception. When I nop those 2, I get this: Registered to: 0 Thank you for registering

HMX0101's Small

Download nsmallcrk.zip, 30 kb (password: crackmes.de)
Browse contents of nsmallcrk.zip

Small crackme by HMX0101

After long time without releasing nothing... i've decided to bring you another easy crackme.. i hope you don't get loose with all that code ;D

Unpack and find the correct password in order to
decrypt good boy message... don't patch it, its easy ;)

PD: beware of exceptions :)

Greetz: lord_phoenix, Ox87k, Ank83, l0calh0st, n00b, cyclops, starzboy, crosys, Guetta, anorganix and crackmes.de, ARTeam, CracksLatinos members

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 04. Jan, 2008
Downloads: 644

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Solutions

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Discussion and comments

-Lord Virus- 07. Jan 2008	Can I crack it by using Brute Force?.
HMX0101 Author 07. Jan 2008	Hmm, i think its the only way to solve it ;P...
-Lord Virus- 07. Jan 2008	too much work but I will try it. Is there any exception here? I didn't see anything.
HMX0101 Author 07. Jan 2008	C'mon its not harder at all.. you just need to code your own bruteforce.. jB solved it already :)
Zaphod 13. Jul 2008	Finally!! I found the password! HMX0101: If the name of the crackme should reflect the amount of work it takes to solve it, it should not have been called "Small", but rather "Not so small" or "Absolutely not so small!!" :)

HMX0101's Spare Time

Download sparetimefix.zip, 5 kb (password: crackmes.de)
Browse contents of sparetimefix.zip

New keygenme, this time coded in C#..
Since I'm new to this language, this one is easy :)

As usual: Keygen, and no patching!
Greets fly out to: Numernia, Encrypto, Cyclops, pusher, everlast, Till.ch, HVC, Adv., and all my other friends I forgot ;P

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 18. Mar, 2009
Downloads: 575

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Solutions

Solution by Numernia, published 20. mar, 2009; download (37 kb), password: crackmes.de or browse.

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Solution by indomit, published 20. mar, 2009; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

indomit 17. Mar 2009	Nice crackme for the first time, HMX0101 :) Solution uploaded :)
HMX0101 Author 18. Mar 2009	Thanx to numernia for pointing me a bug :)... Now its fixed.
geeko 19. Mar 2009	why don't you say that we need MSCOREE.DLL? I don't have it so I cannot run it
geeko 19. Mar 2009	sorry , .NET you can delete comment
indomit 19. Mar 2009	2 HMX0101: Ok. Now I can't skip a loop. But can I use the value 32 for it? Then it is can be easily simplified and reversed. :) Or do I need to take all possible cases? :(
Numernia Moderator 19. Mar 2009	Hi indomit, I think that is the idea, atleast i did so in my solution. best regards

HMX0101's White Crackme

Download WhiteCrackme.zip, 57 kb (password: crackmes.de)
Browse contents of WhiteCrackme.zip

===================================
Easy crackme with some lame tricks,
to beat it you need:

- Unwrap it manually! or write a unwrapper for this lammer protection :)
- Make a keygen (the keygen must generate more than 1 valid serial for each name)
- Write a tutorial :D

Rules:

- Don't patch the serial comparation
or any jump to register it :)

Greets to:

Ox87k, Ank83, l0calh0st, Ricardo Narvaja,
and all members in CracksLatinos, crackmes.de and ARTeam forum.
===================================
Enjoy it!
12/09/2006

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 13. Sep, 2006
Downloads: 882

Rating

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Solutions

Solution by l0calh0st, published 21. sep, 2006; download (81 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 13. Sep 2006	ok, unwrapped! very very nice and also simple... Now i try to write a keygen!
red477 14. Sep 2006	Not bad. But a little bug, when you clear all the text in the serial editbox, it collapses.
jB_ 21. Sep 2006	A small unwrapper: http://jardinezchezjb.free.fr/crackmes.de/hmx-unwrapper.c
kaiZer-by 22. Sep 2006	BeautifuLL crackme!

HonestGamer's Crackme

Download hg-cme.zip, 3 kb (password: crackmes.de)
Browse contents of hg-cme.zip

Crackme is coded in C# (.NET) using Visual Studio 2010.

=========================

The User ID should be an integer that is less than 4 digits.

The User Code should be an integer as well...

=========================

This crackme is no big deal, so best of luck! :)

Regards,
HonestGamer

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 15. Feb, 2011
Downloads: 1240

Rating

Votes: 8
Crackme is quite bad.

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Solutions

Solution by xylitol, published 18. feb, 2011; download (87 kb), password: crackmes.de or browse.

xylitol has rated this crackme as boring crap.

Solution by Dooms_day, published 18. feb, 2011; download (11 kb), password: crackmes.de or browse.

Dooms_day has rated this crackme as boring.

Solution by TripleTordo, published 18. feb, 2011; download (5 kb), password: crackmes.de or browse.

TripleTordo has rated this crackme as nothing special.

Solution by Mayhem, published 18. feb, 2011; download (4 kb), password: crackmes.de or browse.

Mayhem has rated this crackme as boring crap.

Solution by gehstock, published 18. feb, 2011; download (178 kb), password: crackmes.de or browse.

gehstock has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

Mayhem 15. Feb 2011	Done, writing solution atm. ;)
Zephy 15. Feb 2011	gehstock: Why do you not submit your solution as tutorial? This is end for other solvers :-/
idid231 14. Apr 2011	Thank 4 your crackme :)
PakM4n 07. Oct 2012	Done. But too easy ._.
LFalch 05. Apr 2013	I finally completed it. It wasn't too hard after got into it. This is the first .NET I've completed and I think I need some harder ones
LordOfFlies 28. Aug 2015	Completed in two minutes, easy as hell. Best way is to reverse this and let the program to write pass for you.

human_thought's BruteCFcrackme

Download brutecfcrackme.zip, 2 kb (password: crackmes.de)
Browse contents of brutecfcrackme.zip

Small KeyFile Challenge

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 07. Oct, 2002
Downloads: 1410

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Solutions

Solution by Scooby D0o, published 11. oct, 2002; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

HuRrIcAnE's ha-ck

Download ha-ck.zip, 7 kb (password: crackmes.de)
Browse contents of ha-ck.zip

This challenge is not crackme or keygenme, it's findme ***just***.

Simple hah !?!

The language is combined between Linux bash (shell) along with the c language (compiled).

Down inside the code, has been commented with the (encrypted) password or the little secret message which is the really challenge.
After you reached the comment area you will know what my prize.

Easy on make; start digging with PID.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Unspecified/other

Published: 22. Dec, 2009
Downloads: 296

Rating

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Solutions

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Discussion and comments

HuRrIcAnE Author 27. May 2010	I wish someone could dig in harder .. Good & Bad news: Bad news that I lost SPECIAL encryptor on the last catastrophe kernel & Grub damage.. Good news, I'll take this challenge over my shoulder and dig as well . ;) cheese

huskyhusky's Crackme #1 by huskyhusky

Download crackme.gz, 1 kb

Just find the correct password, shouldn't be that hard :)

Difficulty: 4 - Needs special knowledge
Platform: Unix/linux etc.
Language: Assembler

Published: 12. Jul, 2016
Downloads: 167

Rating

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Solutions

Solution by acruel, published 20. oct, 2016; download (3 kb), password: crackmes.de or browse.

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Solution by g@t3k33q3r, published 20. oct, 2016; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

acruel 20. Sep, 05:20	This crackme is kind of a small vm. Will submit a solution later ;)
acruel 20. Sep, 16:32	$ ./crackme Please enter a password: 887777787877777777777777778888 Correct! =) $

Hyptonix's decryption mod

Download Crackme.zip, 119 kb (password: crackmes.de)
Browse contents of Crackme.zip

Has a decryption module.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 13. Aug, 2009
Downloads: 234

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Discussion and comments

Hyptonix Author 16. Aug 2009	guessing no one had luck with it? :P

Hyp_oy's First ever Javascript Crackme

Download crackme.zip, 751 b (password: crackmes.de)
Browse contents of crackme.zip

A javascript crackme. Feel free to modify the source.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Multiplatform
Language: Unspecified/other

Published: 02. Apr, 2007
Downloads: 545

Rating

Votes: 8
Crackme is boring.

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Solutions

Solution by wilq32, published 23. jun, 2009; download (682 b), password: crackmes.de or browse.

wilq32 has not rated this crackme yet.

Solution by Jim~, published 06. apr, 2007; download (991 b), password: crackmes.de or browse.

Jim~ has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

Jim~ 02. Apr 2007	A bit too easy for level 4, methinks. :p

IamLupo's CrackMe 3.0

Download CrackMe_3.zip, 37 kb (password: crackmes.de)
Browse contents of CrackMe_3.zip

Hey everyone,

Here again a new project i wrote. I had some new inspiration and converted it to a challange ;) This time you need to find a valid Serial key. Second is to write your own keygen.

Good luck!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 13. Nov, 2014
Downloads: 454

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Solutions

Solution by baderj, published 09. dec, 2014; download (579 kb), password: crackmes.de or browse.

baderj has rated this crackme as quite nice.

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Discussion and comments

IamLupo Author 27. Nov 2014	Working serial: Username: IamLupo Serial: A8G4-5rBX-hQEv-oi42
halsten 27. Nov 2014	I hardly think its a 3, aside from your common C++ over-bloating that most people don't like. Still okay for someone starter. Too many nested arrays. Why abuse C++ classes for this?
IamLupo Author 28. Nov 2014	@halsten: Quote: "I hardly think its a 3, aside from your common C++ over-bloating that most people don't like." I respect your opinion, but please don't talk for others. There is no one else commenting here,... and if they do quote there opinions. Quote: "Too many nested arrays. Why abuse C++ classes for this?" This challange just need those arrays. But what do you mean with abusing C++ classes? any explaining maybe? PS: I thinking you miss the hole point of the crackme challange. First figure out what the program does, and then tackle the problem. I have a feeling you have problems with the first stage.
halsten 28. Nov 2014	amLupo: You missed my comment, I didn't say it was bad, just not a difficulty of 3 at least. I didn't have to write anything in public so I don't ruin it for others and no I didn't miss the the idea behind it, No problem with me taking this private. :)
abc_de 05. Dec 2014	I want to know to how to program it, that's great! But I can't enable to do it!
oXYgen 11. Dec 2014	I think it's impossible to reverse x) Can you give me some help ?
IamLupo Author 12. Dec 2014	@oXYgen: maybe read the solution of baderj. Else look at my first comment. There you find a working serial. debug it and try to find the element you need to generate your own serial ;) If you understand the code and you got the element and you combine it you can make easily a keygen.

IamLupo's Crack Me

Download CrackMe.zip, 247 kb (password: crackmes.de)
Browse contents of CrackMe.zip

The mission is to uncover the password of the encrypted file. Because this challange was to focus on cracking the algoritme, I included the C++ code to get a better overview ;)

I published already my own cracker already. But hopefully you figure it out by your own. Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 03. Mar, 2014
Downloads: 823

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Discussion and comments

draww 11. Mar 2014	crypt.exe has lots of missing dependencies (like libgcc_s_dw2-1.dll , libstdc++-6.dll , etc.)
IamLupo Author 11. Mar 2014	@draww: yes, just run the compile.bat en walla ^_^ I forget to compile the project with parameter -static

IamLupo's Crack Me 2

Download Crack_Me_2.zip, 7 kb (password: crackmes.de)
Browse contents of Crack_Me_2.zip

This is a challange that needs to find a password. This can be solved very easy. Good luck! ^_^

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 13. Nov, 2014
Downloads: 1487

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Solutions

Solution by acruel, published 23. sep, 2015; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

basscode 04. Apr 2014	I don't even get the option to input the password.
IamLupo Author 04. Apr 2014	@basscode: thats right:P you need to understand whats happening :P Hint: With debugging you can inject your password :D Good luck!
new_man 09. Apr 2014	hahah i just change the JZ in 21D1 and got the "ya you should ...." but i know it's stupid but i tired so i dont go over all that FILE0 file (i maybe do that later)
new_man 09. Apr 2014	and another thing. i am not so familer with ntfs structure but when i start to look what your code do it's look like he go over every MFT in NTFS. now i try to locate which file he is looking for (i just BP on LODS of the path string and see when it's join to stop. belive or not i found out about files i never know they exsit)
IamLupo Author 09. Apr 2014	Nice you look at the NTFS code. But don't you think you focus on the wrong part?XD maybe focus on the algorithm to check the password?XD
oozyluce 12. Jun 2014	What is this crack looking for in C:\Windows\System32\config ? I'm still a noob and i find this crackme extremely challenging. It's been more than a day that i'm trying to solve it but i cant seem to grasp my hands on the utmost important part. I also notice that you call alot of Microsoft APIS to read files or set file pointers... Should the password be inserted in one of those files in order to "inject" the password in the program?
otto 06. Jul 2014	I'm a beginner and this is not easy at all. The program seems to read data from the registry but i'm not sure. Maybe the way to "inject" the password is to modify the registry but again not easy.
IamLupo Author 19. Jul 2014	There is no need to know where you must input the password ;) you just can inject the password in the memory with a debugger ;) Just find the assebly code where he checks the password and find the adress. Then you can inject your password ;)
puelo 10. Aug 2014	Crashes for me: Windows 7 x64. No debugger attached.
IamLupo Author 23. Aug 2014	@puelo: Maybe disable virusscanner?
KingMidas 27. Oct 2014	Hey Lupo, First off, thanks for the crackme! It's thaught me a lot so far. I've got the password, and as soon as I find out where that blasted [esi] is coming from i'll have the hFile as well. Get ready to have that beer with me! Slt, Midas
IamLupo Author 27. Oct 2014	@KingMidas: Nice you had fun ^_^ PS: Beer? Where!:D
KingMidas 27. Oct 2014	Hey Lupo, Since the GoodBoy's in French, I'm guessing somewhere near the French-Belgian border? ^^
RagingGrim 31. Mar 2015	Edited The First Part Of The Assembly In The Module CrackMe to JMP Crack_Me.00D8223C. Was fun! Although I have no idea how to find the password XC
R4v3N-THS 01. Apr 2015	I solved it but that file was a little suspicious. Requires admin privs and it closes out really fast. Just sayin...
horntooter 03. Apr 2015	A couple of things. This has a major virus-y vibe to it. Also, I would suggest definitely supply a way to input the password in the future. If you just inject it, then you might as well set eip=the finish. Done. Also, this is probably higher than a 1 skill-level because of all the virus-y stuff it's doing.
Herz3h 11. May 2015	Im stuck on the part of sam file...cant find ressource on this file :/

IamLupo's Humble Bundle Challange 2

Download Humble_Bundle_Challange_2.zip, 691 kb (password: crackmes.de)
Browse contents of Humble_Bundle_Challange_2.zip

Hey boys and girls,

In this challange there is a file "crackme.zip.enc" you have to crack this to win the challange.

There are multiple things you need to find/do. Use the internet and script your own function to decrypt the "crackme.zip.enc".

One important hint you need to crack this challange is that this challange originally started at 16 September 2014 - 07:20 AM.

Good Luck!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 06. Oct, 2014
Downloads: 364

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by mrmacete, published 14. nov, 2014; download (7 kb), password: crackmes.de or browse.

mrmacete has rated this crackme as quite nice.

Solution by baderj, published 13. nov, 2014; download (365 kb), password: crackmes.de or browse.

baderj has rated this crackme as awesome.

Send a message to Icematix »

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Discussion and comments

man of the war 08. Oct 2014	nice dude I Well Try
IamLupo Author 12. Oct 2014	@man of the war: Good luck ^_^
mrmacete 17. Oct 2014	hi, is your hint precise about the hour/minutes? isn't there a (intentional?) typo on minutes?
IamLupo Author 17. Oct 2014	@mrmacete hehe, nice question! Answer: I didn't say i encrypt the challange on "16 September 2014 - 07:20 AM". The challange itself was published on hackhound at "16 September 2014 - 07:20 AM". But i think you found a collision with the date? Am i right? If sow, you are on the right way ;)
mrmacete 18. Oct 2014	ehehe, too late ;) the gift's already taken :(
IamLupo Author 18. Oct 2014	@mrmacete Thats to bad,.. you know what, i will give you a new gift link if yousend the one you found ;)

Icematix's Icematix's first KeyGenMe :)

Download Icematix_KeyGenMe.zip, 100 kb (password: crackmes.de)
Browse contents of Icematix_KeyGenMe.zip

Hi.
This is the first crackme I ever made in my life, so I hope its not too bad. :)

Its a standard-KeyGenMe asking you for a serial to access the goodboy.

To achieve this I combined two simple encodings.

No solution is accepted without adding a working keygen ! :)

That means no patching etc.

Well, I can only wish you some fun ! :D

You can ask me for Source Code if you are interested, just send me a mail ( flo_x [att] mail [dot] ru ).

Greetings,
Icematix

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 13. Jun, 2009
Downloads: 415

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by Ganoes Paran, published 15. jun, 2009; download (132 kb), password: crackmes.de or browse.

Ganoes Paran has rated this crackme as awesome.

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Discussion and comments

Icematix Author 13. Jun 2009	Nobody looked at it yet? :>
Ganoes Paran 13. Jun 2009	i will, downloading atm to laptop (main comp is vista x64, olly 1.1 doesn't work on it :_:)
Ganoes Paran 14. Jun 2009	ugh, it's jumping around a bit lol. i think i got the algo but i dunno..
Icematix Author 14. Jun 2009	Still nothing, come on ^^
Ganoes Paran 14. Jun 2009	calm your horses lol first off, please put a cin.ignore(); cin.get(); or system("pause"); or seomthing please lol anyawys got a vlaid serial for me: user: ganoes pass: eo_hlwmxcmq\| this one was fun, i think i can code a valid keygen out of this, so i'm on it. thanks, i liked this crakme =)
Ganoes Paran 14. Jun 2009	ok finished up algo, making keygen now
Icematix Author 14. Jun 2009	don't understand me wrong, just wanted to see a bit feedback as already > 50 people downloaded the file and it got 3 votes. :>
Ganoes Paran 14. Jun 2009	yea i rated it awesome lol. made a keygen it works 100% it's a console keygen, gonna convert it to gui keygen. gonna PM you console keygen
Icematix Author 14. Jun 2009	Grats Ganoes Paran on the first working solution !
Ganoes Paran 14. Jun 2009	ok, i can't create gui, i suck =( will make a tut then attach keygen =)
Ganoes Paran 15. Jun 2009	alright, tutorial submitted along with keygen + sourcecode of keygen heavily commentated upon =)
Icematix Author 15. Jun 2009	Very nice. ;> Why should you make a GUI ? just bloats everything.
Ganoes Paran 15. Jun 2009	because GUI looks nice :P
sd333221 16. Jun 2009	Ganoes I never saw a worse code formatting than yours
Ganoes Paran 17. Jun 2009	i am deeply honored :P again, as i said there, i could make the code all short and nice and the like, shortening up commands but w.e. it was hastily done =)
blurner 21. Jul 2009	This is the first KeyGenMe I've solved :D.

ideku_nih's Code this

Download Code_B.zip, 5 kb (password: crackmes.de)
Browse contents of Code_B.zip

This program is set for Cracker Prof.

Your mission :
Get Code and Serial

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 16. Feb, 2011
Downloads: 428

Rating

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Solutions

Solution by deurus, published 28. mar, 2012; download (81 kb), password: crackmes.de or browse.

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Discussion and comments

ideku_nih Author 13. Mar 2011	hint Code : ATITZ___ Serial : C5540
Zephy 13. Mar 2011	To ideku_nih: Thx for the hint. I try solve this cme, but in my keygen algo i have anywhere a bug and i can't find it. For this code "ATITZ___", after second FOR cycle in cript function is compute value equal "3872"???
Kingstaa 14. Mar 2011	CODE: KINGSTAA SERIAL: 236500
Zephy 15. Mar 2011	Name: Zephy.. Serial: 3881C0 ...but my keygen don't work :-/
ideku_nih Author 06. Apr 2011	...how can you do that ? :o awesome...
deurus 27. Mar 2012	deurus1234 6441F0 keygen coming soon...

ideku_nih's then Crack me

Download Crack_.zip, 5 kb (password: crackmes.de)
Browse contents of Crack_.zip

get name and serial ...
go... :D

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 11. Feb, 2011
Downloads: 331

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Solutions

Solution by Zephy, published 15. feb, 2011; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

ideku_nih Author 13. Feb 2011	um.. ok folks, that two ID above is Real Cracker. who's next

idq000's CrackMe! Level2 FNEW

Download crackemelvl2_-_idq000.zip, 21 kb (password: crackmes.de)
Browse contents of crackemelvl2_-_idq000.zip

Again, any dumbass who sits at the computer for 10 seconds can figure this out.

Thanks tE!

lol

Good luck,
idq000

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 17. Sep, 2004
Downloads: 1134

Rating

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Solutions

Solution by EsKiMo, published 17. feb, 2006; download (25 kb), password: crackmes.de or browse.

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idq000's Crack Me! Level 1 by idq000

Download crackmelvl1-idq000.ZIP, 9 kb (password: crackmes.de)
Browse contents of crackmelvl1-idq000.ZIP

This should be a very simple crack me. It is to train new crackers to reverse Visual Basic Applications. The objective or goal of this program is to be able to enable both a textbox and a button. Once registered, follow the procedure in help to submit your solutions. Once accomplished, the first five newbies that is able to reverse the application will get a place in the next crack me.

Good luck and best of hope,
idq000

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 11. Aug, 2004
Downloads: 2657

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by SoN, published 05. may, 2006; download (8 kb), password: crackmes.de or browse.

SoN has rated this crackme as boring crap.

Solution by rapid_snail, published 05. oct, 2004; download (66 kb), password: crackmes.de or browse.

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Solution by CrackerSixx, published 23. aug, 2004; download (8 kb), password: crackmes.de or browse.

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Solution by xyzero, published 11. aug, 2004; download (9 kb), password: crackmes.de or browse.

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Solution by MaBi, published 11. aug, 2004; download (600 b), password: crackmes.de or browse.

MaBi has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

DeCoro 04. May 2006	?????????????????
jamiemac2005 14. Jun 2007	This is alright as a VERY BASIC introduction to vbReFormer etc. but you only check to see wether they are enabled when the program loads, this is very unrealistic!.. if you were to make it more realistic and add function to check when the user changes the text or clicks the button it would be better because you can do this at runtime with ShoWin which takes around 5 seconds.... Unrealistic Slicghtly boring!
DJ1hAD0 05. Mar 2013	Improve your knowledge, use hex-editor=)

idq000's First C++ Crackme

Download cnew-idq000.zip, 36 kb (password: crackmes.de)
Browse contents of cnew-idq000.zip

Well...what can I say...It's my first crackme written in C++.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 05. Aug, 2005
Downloads: 661

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Solutions

Solution by EsKiMo, published 26. aug, 2005; download (7 kb), password: crackmes.de or browse.

EsKiMo has rated this crackme as quite nice.

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idq000's SSL Advanced Registration

Download mreg-resubmitted.zip, 40 kb (password: crackmes.de)
Browse contents of mreg-resubmitted.zip

Welcome to my last crackme coded in Visual Basic. It is packed to save space (with FSG, of course) and took me a while to code this one so I hope you have fun! Also if anyone knows any good books or tutorials on C++ OR VC++, email me. Good Luck!""

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: (Visual) Basic

Published: 22. May, 2005
Downloads: 649

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idq000's SSL EncryPTO ADVanced Lvl I

Download SSL1_-_idq000.zip, 16 kb (password: crackmes.de)
Browse contents of SSL1_-_idq000.zip

SSL EncryPTO series is for advanced crackers (or not). This program is designed for advanced or advanced novice crackers who know how to unpack (oops...) this program. I do not expect a keygen, but it would be nice if you would make one, but all I require is what I tell you *after* you crack it! You may not be able to crack it (unless you're +ORC).

Good luck,
idq000

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 24. Aug, 2004
Downloads: 1230

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by EsKiMo, published 13. feb, 2006; download (26 kb), password: crackmes.de or browse.

EsKiMo has rated this crackme as quite nice.

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Discussion and comments

Ank83 03. Jan 2006	Hi ! I'm interested does the Unique ID somethime change, or it's fixed ! I test it on two computer in random days and it always comes the same !
Ank83 04. Jan 2006	Can anyone try this crackme ? I'm getting a headache !
warrantyVoider 04. Jan 2006	"The DEVELOPER reserves the right to prosecute any individual(s) who attempts or modifies, translates, decompile, disassemble, or create derivative works based on the software." Ok, this isnâ€™t even a proper sentence, but thatâ€™s not the point. A crackme with an EULA that prohibits cracking? What the hell were they thinking?
EsKiMo 11. Feb 2006	The ID is unique for each Computer Username. You can work in the keygen ... or find the other way :)
EsKiMo 11. Feb 2006	A closer look tells the KEY is unique for each Computer Username (not sure about the ID).

idq000's SSL eNcrYpTO Level 2

Download crackmelvladv2_-_idq000.zip, 25 kb (password: crackmes.de)
Browse contents of crackmelvladv2_-_idq000.zip

Any dumbass can do this. That is...if you're up for it...

lol

Good luck,
idq000

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 17. Sep, 2004
Downloads: 962

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Solution by chrome, published 19. aug, 2005; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

psych1c 12. Aug 2005	The EULA included says : ------------------------------- The DEVELOPER reserves the right to prosecute any individual(s) who attempts or modifies, translates, decompile, disassemble, or create derivative works based on the software. The user may not modify, seclude, decompile, disassemble, or create derivative works based on this software, code, or any files that had orignally existed in the original file and in its original published format. -------- Isn't this supposed to be a place for LEGAL reversing, I'm not gonna even attempt this, there are plenty of other crackmes which are legal to crack
Knight 12. Aug 2005	And this stupid EULA prevents u from cracking it? If everybody was like u there was no RE. Actually i've seen here more crackmes with EULAs included. Can't u simply crack it and not publish solution (as i did, but not for this reason)? Nobody will know that u disassembled or decompiled it and even cracked. And whats the difference when u do no damage to nobody, do not hurt somebody and i don't see nothing bad in cracking program which was created to be cracked. Just my thoughts.
_khAttAm_ 12. Aug 2005	What License for a crackme?? Come on :) Get some weed and start cracking................... Don't bother EULAS for crackmes........... And please, no EULAs saying no reversing, modifying, blah blah........... in crackmes.............
deroko 12. Aug 2005	EULA... rofl...
idq000 Author 13. Aug 2005	Hmm...woops...problem solved! FILE EULA.TXT from future versions deleted.

ikad's Employee

Download Employee.zip, 34 kb (password: crackmes.de)
Browse contents of Employee.zip

Crack it!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 12. Jul, 2016
Downloads: 625

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Solutions

Solution by gibleMac, published 25. aug, 2016; download (634 b), password: crackmes.de or browse.

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Solution by UltraM4N, published 25. aug, 2016; download (35 kb), password: crackmes.de or browse.

UltraM4N has rated this crackme as quite nice.

Send a message to Ilay »

View profile of Ilay »

Discussion and comments

zazoutaz 16. Jul, 09:41	EAX must != 0 at 1679.
asor 22. Jul, 22:54	004016D6: NOP 004016D7: NOP :)
sadfud 03. Aug, 18:00	too easy. thanks
arlkers 24. Aug, 09:05	Someone writes a generator, F1 (code) =f2 (pass)
IWannaBeTheBest 26. Aug, 23:58	Is it possible to solve this without using NOP's?
Kirdneh 27. Aug, 14:10	@IWannaBeTheBest 004016D6: JMP SHORT 004016D8 works as well. its like always jump to access granted
IWannaBeTheBest 27. Aug, 16:40	@Kirdneh Oh I see. Thanks.
10SecSleeper 10. Sep, 13:34	Searched for string references. Found what jmp to access granted. Reversed from JE to JNE.
vmlinuz11221 15. Sep, 21:45	0x40166e: NOP 0x40166f: NOP 0x401670: NOP 0x401671: NOP
dahek 11. Oct, 11:12	004016d6 je->jg
allocer 23. Nov, 22:27	Is it possible to solve it by find out how correct passcode is generated for given number?

Ilay's Calculator

Download crackme.zip, 181 kb (password: crackmes.de)
Browse contents of crackme.zip

This crackme has Check RN button for serial key check, after the input of right serial it will open all functionality and all buttons will not crach and give right result, this binary has no engine to store the fact that right serial was been enterred so you should enter serial every time when you run it.

[modnote]
credit to the author of calculator:
http://www.codeproject.com/KB/applications/caclulater.aspx

the crackme's author is not known
[/modenote]

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 28. Sep, 2010
Downloads: 540

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Solutions

Solution by redoC, published 10. oct, 2012; download (342 kb), password: crackmes.de or browse.

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Discussion and comments

jE! 28. Sep 2010	btw, it jumps to stack. just interesting side fact: msctf regularly does OpenProcess (fullaccess)> CTFMON.
simonzack Moderator 29. Sep 2010	@KKR_WE_RULE: make your comment shorter
KKR_WE_RULE 29. Sep 2010	oops.. Sry simon ..Forgive me plz . I just wanted guys to see kanal readings of this kgm :D
Ilay Author 29. Sep 2010	guys, please write here or to me personally what you found about that cme.
Ilay Author 30. Sep 2010	btw, just patching before messagebox is not enoght, just check work of all buttons after your pathcing...
tclover 06. Oct 2010	haha thats funny ) I have thought a little. I do not know, how it was "right" to crack it, but for was enough ReaHack and EmEditor )
Ilay Author 07. Oct 2010	tclover, do you really sure that all buttons works well and there are no craches? craches and invalid work of buttons present as protection
tclover 07. Oct 2010	yep man, everything works correctly. http://img828.imageshack.us/img828/6376/capture1t.jpg
Ilay Author 07. Oct 2010	tclover, try sin button
redoC 07. Oct 2012	so trivial but so hard... raise diff level to 4-5, solution soon

iLL_LeaT's Crypta-Lock-O-Matic

Download Crypta-Lock-O-Matic.zip, 6 kb (password: crackmes.de)
Browse contents of Crypta-Lock-O-Matic.zip

I'm new to this, so I'm sure this will be easy for most of you. However, I ran into a problem very similar to the one presented here and could not figure it out. I ended up having to patch it. When you solve it, an explanation of how you acquired a parent key would be very much appreciated.

Good Luck

Requires

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: .NET

Published: 19. Mar, 2009
Downloads: 384

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Solutions

Solution by cyclops, published 28. mar, 2009; download (17 kb), password: crackmes.de or browse.

cyclops has rated this crackme as nothing special.

Send a message to Immortal_One »

View profile of Immortal_One »

Discussion and comments

iLL_LeaT Author 28. Mar 2009	Damn, I almost had it solved. and I had the advantage of making the keygenme. Oh well, I'm looking forward to reading your solution. Thanks.
simonzack Moderator 28. Mar 2009	cool took a week to factor RSA good work! :D
cyclops Moderator 29. Mar 2009	Thanks simonzack! Factoring was done by andrewl :)

Immortal_One's CrackMe1

Download CrackMe.zip, 172 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Find Correct Password..

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 09. Jan, 2005
Downloads: 2603

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Solutions

Solution by _HellDashX_, published 14. jan, 2005; download (61 kb), password: crackmes.de or browse.

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Send a message to __imp__ »

View profile of __imp__ »

Discussion and comments

Noteworthy 25. Apr 2011	Cracking done ! next time, MADE US SOMETHING GOOD, OR I SHOOT U ;)

EvOlUtIoN 30. Oct 2007	Sorry...maybe i didn't understand what to do! I drawn a correct polygon and it is crashing on dx click...is it normal? What to do now?
__imp__ Author 30. Oct 2007	Now: 2. Describe a class of correct polygons. This means: describe, what polygons are accepted by the program (shape, number of vertices, etc. - whatever the sufficient conditions are). "...it is crashing on dx click..." On my computer it works OK, and I didn't use any machine-specific stuff here. Anyway, you should use only l and r button single clicks. Does anybody else have this problem with crashing?
TiGa 30. Oct 2007	No crash even on Vista x64.
zairon Moderator 30. Oct 2007	No crash on xp sp2. Evo, tell us more about the crash.
__imp__ Author 01. Nov 2007	Is anybody working on this? It needs only some basic knowledge in geometry, and some time to reverse (or to identify) the algorithm(s).
simpleuser 01. Nov 2007	I had a long & interested look already. I'll definitely try and solve it. It's too original to be ignored IMO.
Shism 01. Nov 2007	It accepts 31 lines max ?
Trundle 01. Nov 2007	@Shism: Jep. Check the WM_LBUTTONDOWN-Handler: .text:004011B1 cmp dwNumPoints, 1Fh .text:004011B8 jbe short loc_4011D0 loc_4011D0: ;Add point...
Trundle 01. Nov 2007	Ok, I solved it. This crackme is pretty nice, although it is definitely not 4. I consider it best to give this one a 2 or 3. Anyway, I will submit a tutorial as soon as possible (tomorrow?).

imp's KeygemMe #1

Download KeygenMe_1_by__imp__.zip, 4 kb (password: crackmes.de)
Browse contents of KeygenMe_1_by__imp__.zip

This is my very first crackme.

The algorithm is rather long and complicated and I think it will be difficult for newbies to solve it.

For the details read info.txt supplied with executable.

Good luck,

__imp__

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 08. Mar, 2006
Downloads: 785

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Solutions

Solution by Zaphod, published 24. mar, 2006; download (23 kb), password: crackmes.de or browse.

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Discussion and comments

__imp__ Author 16. Mar 2006	Has anybody solved this already?
Zaphod 16. Mar 2006	I think I'm close to finding the right serial for my name, but writing a keygen may prove too difficult. This is a tough one - is it really only level 2?
__imp__ Author 16. Mar 2006	Well, I guess it's harder than level 2. However, if You catch the meaning of the algo it won't be so difficult to make a keygen. A hint: there are some idle procedures at the end (just to lead astray).
Zaphod 16. Mar 2006	Now I know how to find the serial for a specific name, but I don't think I can write a regular keygen. BUT, a selfkeygen, on the other hand, shouldn't be too hard. That's what I'm working on now...
kittmaster 17. Mar 2006	You guys are really getting off your own hype..........I mean.......unpacking fsg is a pita all by itself and well above a level 2, now this crazy scheme. I enjoy working on them but two spend more than 2 hours on something like this.........no way.
l0calh0st 21. Mar 2006	SelfKEygen doesn't work
zairon Moderator 21. Mar 2006	I tried on Xp and I haven't problem. Which os are you running? Which sp?
code_inside 21. Mar 2006	I think l0calh0st meant that the selfkeygen does not output the correct serial in the editbox :) In fact, it doesn't output anything ;)
zairon Moderator 21. Mar 2006	Hm, strange I would say. I can clearly see the serial. Code_inside, which os? I don't have all the os at home and I can't check if something runs fine on each os...
code_inside 21. Mar 2006	zairon, I've checked the selfkeygen and it seems that Zaphod has used an immediate push of the window handle as part of SetDlgItemTextA (He used "push dword ptr [0012FBF0]", he should use "push dword ptr [ESP+1C]" :) So on some systems it may work, but not on all systems ;)
__imp__ Author 21. Mar 2006	The Selfkeygen doesn't work on my machine too (winxp sp1) :( Respect to Zaphod, the tutorial is quite OK! I hope that the algorithm will be eventually broken.
l0calh0st 21. Mar 2006	XP SP2---Like code_inside said...nothing is shown :(
l0calh0st 21. Mar 2006	and the serial is shown after changing to [ESP+1C].Thanks for the tip code_inside
__imp__ Author 21. Mar 2006	A remark: i think it's worth describing how to deactivate very simple antidebugging trick that i used in this crackme. I haven't found this in the solution. Maybe some real mode debuggers can do it automatically (i don't know) but nevertheless...
HMX0101 21. Mar 2006	__imp__, with the plugins you can bypass the debugger protection...
__imp__ Author 21. Mar 2006	Well, OK. I just find it useful to describe what to do without plugins :))
Zaphod 22. Mar 2006	I am glad that code_inside found out about the [ESP+1C]-thing, thanks for that. This must mean that the handle can be stored in another place than [0012FF0] on other computers? By the way, I forgot to mention in my tutorial that I tried to make the keygen contain NOT two buttons saying "Check!" and "About", but only one button saying "Generate serial", but I could'nt do that. I tried using ResHack, but that didn't work. Someone who knows how to do it?
Zaphod 22. Mar 2006	[0012FF0] should be [0012FBF0] :)
__imp__ Author 22. Mar 2006	Zaphod, if you want to change resources then i think you should better make your own resource file and replace inaccessible dialog with your own (using ResHack). In this case you must know IDs of dialog controls which are easy to find. P.S.: I tried this and it works fine.
Zaphod 23. Mar 2006	Thanks for the tip, __imp__, I am not quite sure how to do this, but I'll try to find out. After all, this is all about learning...
Ank83 23. Mar 2006	yeap ! That right - IT IS ALL ABOUT LEARNIG !

imp's Keygenme #2

Download keygenme2.zip, 6 kb (password: crackmes.de)
Browse contents of keygenme2.zip

This crackme is written in C#, therefore it's for those who familiar with .NET environment (.NET framework v1.0).
I didn't employ any 3rd party protectors or obfuscators.

Rules:
----------------------

It's up to you what tools and methods to use, everything is allowed.

To do:

1) Find the appropriate format for name and key.
2) Make a key generator.
3) Write a tutorial.

----------------------

Good luck,

__imp__ September 18, 2007

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 20. Sep, 2007
Downloads: 591

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

nhc1987 28. Sep 2007	Rules: ---------------------- It's up to you what tools and methods to use, everything is allowed. ~~~> Patch is ok ?
__imp__ Author 28. Sep 2007	In order to solve it you have to do the following: 1) Find the appropriate format for name and key. 2) Make a key generator. If you can do this by patching, then it's OK. P.S. Patching the condition code won't do, because it doesn't give a correct key.
nhc1987 28. Sep 2007	Yeah! I found 2 ways to solve this keygen me: 1. Brute force 2. Patch P/s: I patch at "return (num3 == n3)" to "return (num3 != n3)". Is it ok ?
zairon Moderator 28. Sep 2007	> 2) Make a key generator It's obvious, patch is not allowed...
nhc1987 28. Sep 2007	Sorry, If patching is not allowed, I will try another way.
rongchaua 28. Sep 2007	@imp : Can you make a keygen for this keygen me? As I analyse, we must solve an 16 variables-equation system to get the value of array buffer and this value must be integer. I don't think it is imposible to do that. Regards. rca.
rongchaua 28. Sep 2007	"I don't think it is imposible to do that" <-- Sorry, fasle. I want to say I don't think it is possible to do that.
__imp__ Author 28. Sep 2007	It IS possible. You can do this by row reduction of the equation system over a quotient ring. I know, maybe it sounds abstruse, but it wouldn't be very difficult.
MR.HAANDI 29. Sep 2007	@__imp__: did you think of linear dependencies?
__imp__ Author 01. Oct 2007	Of course, I thought about it. Linear dependencies are probable as well as inconsistency. It's well easy to fix it, but I intentionally didn't do that, just not to complicate the algorithm (maybe it was a mistake).
MR.HAANDI 01. Oct 2007	So in the particular case here not every name has a valid key :( since I made a keygen, which won't work for any name, this is kind of unaesthetic
__imp__ Author 01. Oct 2007	I think that finding a name that has no valid key is a good problem too. Anyway, if I would have checked that the solution exists and altered the input to fix it, I should have solved the system or calculated a det modulo p myself. In this case, one could just exploit my own code for solution, and I didn't want this. P.S. One possible, but still unaesthetic, solution is to switch letter case in a bad name or append '_' to it.

imp's KeygenMe #3

Download __imp__keygenme3.zip, 5 kb (password: crackmes.de)
Browse contents of __imp__keygenme3.zip

Hi!

I'm glad to welcome you to my third crackme. I'm sure that it's much more difficult, than the previous two. I put a great piece of protection to this, hence it may take a long while to understand what's going on. But be patient, the algorithm is not very difficult and the solution is easy, once you catch the key points.

Your job will be:

1. Make a keygen.
2. Find a hidden message.
3. Write a tutorial.

Rules:

This time patching is prohibited, but selfkeygen is *strongly* encouraged ;). Note that keygen must work with the *original* crackme!

The second task is optional, but it will be really cool if you have done it.

Have fun!

Regards,

__imp__

P.S. All the important crackme's functionality has been tested, but if you find a bug please report it to me at crackmes.de.

P.P.S. Be careful when using SoftIce...

Difficulty: 8 - *VERY VERY* hard
Platform: Windows 2000/XP only
Language: Assembler

Published: 17. Oct, 2007
Downloads: 712

Rating

Votes: 4
Crackme is awesome.

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Solutions

Solution by Trundle, published 17. dec, 2007; download (541 kb), password: crackmes.de or browse.

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Discussion and comments

MR.HAANDI 18. Oct 2007	nice work! a very good combination of a little anti debug, a little anti trace and a clever vm.
__imp__ Author 19. Oct 2007	@MR.HAANDI: Thanks! I'm looking forward to your solution...
jB_ 19. Oct 2007	Good crackme, as MR.HAANDI said. Great work, __imp__.
lilcw 19. Oct 2007	pretty nice one u managed to freeze my ida hehehe
__imp__ Author 22. Oct 2007	I'm glad to hear that my efforts haven't been futile :) Does anybody have a solution by now?
killbug2004 24. Oct 2007	http://bbs.pediy.com/showthread.php?t=53779 There is an article Is it a solution
__imp__ Author 24. Oct 2007	I don't know Japanese, sorry... Nevertheless, from what I've seen, this solution is incorrect. The goal ISN'T to display a 'good boy' message, but to make a key generator (or self key generator, which is preferred). As for hidden message, you have to find a message itself (not the words "the hidden message is:"). I haven't seen this in the solution. Maybe I get something wrong?
hawking_china 25. Oct 2007	Pediy is a Chinese forum , not japanese!!!
__imp__ Author 25. Oct 2007	I'm sorry. Anyway, I don't know Chinese too.
ulaterck 27. Oct 2007	Hello, I am now trying to see the routine generator which is a Little dificult because I never used MMX registers ;P In any event mint obfuscated the code but what we can eliminate nops jumps, good emulation IsDebuggerPresent and NtSetInformationThread:) good we can pass with this generic solutio to create the file custom.ev and write v EV. # (45 56 12 23) and write any type of serial xxxx-xxxx-xxxx-xxxx and press check, but now I find quiet routine as to the name and records MMX is the case but just to have a little more time to do the tutorial greetings and good crackme ;P
__imp__ Author 19. Nov 2007	It's been more than a month since I submitted it. That's why I give some remarks in order to help you solve it (for those who wants to do it). 1. Yes, this is a virtual machine with mostly non-elementary opcodes (in fact, routines). 2. The keygenme has ALL the necessary opcodes for self keygenning. You just need to solve a simple math problem and to modify the checking vm routine accordingly. 3. Placing 12h opcode IS NOT A SOLUTION. Only keygen is acceptable. 4. And final hint: the name processing doesn't matter for the solution, so don't waste your time on it. I hope that it will be solved soon :)
__imp__ Author 19. Nov 2007	As for the hidden message, you just need to demand from the prog to show it, and very earnestly :)
jE! 25. Nov 2007	heillou! i think, here is not enouf l0gic. you NOT want patch, ye? then if we allow file CUSTOM.EV, then it will (self but) PATCH! if allowed 'vm' self-PATCH, what should be then KeyGenned??? so, this question needs answer: 1. must Keygen work WITH-OUT file CUSTOM.EV? 2. seems 32 times we must send WM_CHAR for "hidden msg". and then 32 other bytes XOR this!? why must we kill ourselves by brutting "hidden msg"?? many month you will wait.. or brutting not need? some guess need? 3. about BUGS. many times i cryed, when crackmes NOT PRESERVES registers in WIN_MAIN or DLG_FUNC... ehhhh..
__imp__ Author 26. Nov 2007	Hello! 1. When I said 'patching is prohibited' I meant that modification of EXECUTABLE is inappropriate. IMO, if you add an external file that is supported by the crackme, it will not be patching. So, you may either add a PROPER file 'custom.ev' or write your own keygen. 2. The second task is optional. If you want, you can find this message without total bruteforce (see a hint in my previous post). The first word of the sequence that makes the msg appear is there ;) And the other words can be guessed. 3. "about BUGS. many times i cryed, when crackmes NOT PRESERVES registers in WIN_MAIN or DLG_FUNC..." Does it make any problems? I've not encountered any... I know, maybe, it's not a good style... but for what to add extra strings if they are not necessary in this case? Regards, __imp__
jE! 28. Nov 2007	I did KeyGEN, will thimk about HIDDENmsg.. now about that HIDDEN msg.. BUG is BAD, for example W9x.. that is nothing hard, just add in future to 'wnd_proc' USES EBX,ESI,EDI
jE! 28. Nov 2007	BTW, writing of 'custom.ev' NOT reqiured by your statement.
jE! 29. Nov 2007	but! 'custom.ev' DONE! wow!! now, i have little englich, so can't guess even well known phrase.. what to do with your HIddenmswg?? any msg injection with CRC spooff??
__imp__ Author 29. Nov 2007	@jE!: 1. "BUG is BAD, for example W9x.." Well, see above: _Platform: Windows 2000/XP only_. It'll not work under win9x at all! So, IN THIS CASE it was not necessary. 2. Yes, 'custom.ev' file is not required. 3. You may abandon the hidmsg and submit a solution. If you really want to do it, just find the 1st word and try to restore the others char-by-char (some guess is needed here). A hint: all the letters are lowercase, but there're some non-alpha chars in the both sequences. "any msg injection with CRC spooff??" If you want to replace the msg by your own, that won't do.
jE! 02. Dec 2007	i'm waiting, when you reveal Hiddenmsg, then i will write tut..:) 422 bytes is custo.. :)
__imp__ Author 03. Dec 2007	TOO MANY bytes. I have only 20 :)
jE! 03. Dec 2007	bigger is better!
__imp__ Author 11. Dec 2007	Well done, Trundle! Nevertheless, there is a more elegant solution (I mean self keygen), and I really want to see that 20-byte file custom.ev :) So, now that the cm has been solved I give some additional info: Let P(X) be a permutation of an n-element set X. P^[-1](X) is a reverse permutation, and P^k(X)==P(P...P(X)..) (k times). Then for any integer k there exists integer m>=0 such that (P^k)^[-1]==P^m. The proof of this statement is trivial, and this should be enough to make a self keygen. Good luck!
jE! 11. Dec 2007	blah, don't i said, i did self keygen? but you not reveal that "GREATEST" hiddenmsg.. eh, maybe i write solution.. maybe you loss me..
Trundle 11. Dec 2007	@jE!: I did reveal the hidden message in my solution. @__imp__: I thought a real keygen is the most elegant solution. Nevertheless, as you expected a selfkeygen using a custom 'custom.ev', I will submit an updated solution...
jE! 11. Dec 2007	i read your solution of course. all good except terribl C++:)
__imp__ Author 11. Dec 2007	@Trundle: IMO, the most elegant solution is the shortest in time and space :) @jE!: I really don't understand what the _"GREATEST"_ hiddenmsg is...
jE! 14. Dec 2007	i have time from write tut & did check for 20byte "custom.ev"; 20 byte "custom.ev" produces correct key for char "a"; while my big produces for all names; are sure? did you check your 20byte "custom.ev" for many cases of name?
__imp__ Author 14. Dec 2007	@jE!: Of course, I did. It's not a matter of number of bytes, but of a correct inverse function in terms of the internal opcodes. I think, I have the shortest one, and it definitely works for at least 5 different names. I can't see the reason why it might not work for the other names :) btw, 20 bytes is not a requirement. You may submit a solution with 100s of bytes. If it works then it's OK.

imp's KeygenMe #4

Download Keygenme4.zip, 6 kb (password: crackmes.de)
Browse contents of Keygenme4.zip

No protection placed, so you can decompile it.

Rules:
+) Keygen;
-) No patching;
-) No bruteforcing.

P.S. Note that a correct password is NOT unique for a name - it's not a bug:)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 18. May, 2010
Downloads: 528

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Solutions

Solution by Stardust, published 25. aug, 2010; download (36 kb), password: crackmes.de or browse.

Stardust has rated this crackme as awesome.

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Discussion and comments

Xspider 26. Apr 2010	i guess it uses MD5 isn't right?
__imp__ Author 26. Apr 2010	Right, it does:)
Xspider 27. Apr 2010	ugh the rest O_o i don't understand anything :p i'm not familiar with .net assemblies ^^
Falo 14. May 2010	If Math.Abs(clsCalc.func6(lArr2) / clsCalc.func6(lArr1) - dec3) < (0.0000000000000003D) Then MessageBox.Show("Congratz! Please write a tutorial.", "Correct!", MessageBoxButtons.OK, MessageBoxIcon.Exclamation) the Key is part of the calculation of the key, also some random numbers are part of the calculation, this is not really a Keygen Target... because of the Random Numbers, i was able to crash the app with Name = Name, Password = 000000000000000-0 -> Div / 0 error
__imp__ Author 17. May 2010	@Falo: Normally, the crash you encountered wouldn't have happened, though there might be another reason for crashing. I fixed it in the new version. The algo stayed intact. As to everything else, the target is easily keygennable despite random numbers (I have a working keygen).
__imp__ Author 30. May 2010	Does anyone have an idea?
Stardust 18. Aug 2010	I have an idea... It seems, that your random numbers are vectors of an triangle (you test also if the vectors are really not collinear). Then you calculate the area of the triangle and compare it with an area of an tetragon build out of vectors of this triangle (with factor of MD5Hash of Name and the serialnumber). Yes (for me) serial is just a floating point number. Maybe I have a look at some math books. Very nice crackme (till now)!
Stardust 19. Aug 2010	Finally I found the "equation": Name: "Stardust" Serial: "242944697829282-1" or Name: "__imp__" Serial: "199297538882454-1" I try to write a tutorial. It is a very good crackme with interesting mathematic.
__imp__ Author 22. Aug 2010	Nice job, Stardust! You are absolutely right about the underlying geometry. Looking forward to your tutorial!

imp's SimpleS

Download SimpleS.zip, 1 kb (password: crackmes.de)
Browse contents of SimpleS.zip

Some fresh idea (I hope so) and several minutes of coding.
This crackme is very easy.

To do:

Just get the congratulations :).

And no patching, of course!

As always, I hope you enjoy.

__imp__

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 09. Nov, 2007
Downloads: 1417

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Solutions

Solution by asiiik, published 11. nov, 2007; download (1 kb), password: crackmes.de or browse.

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Solution by IMPosTOR, published 11. nov, 2007; download (523 kb), password: crackmes.de or browse.

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Solution by simpleuser, published 11. nov, 2007; download (448 b), password: crackmes.de or browse.

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Discussion and comments

simpleuser 09. Nov 2007	done. waiting for your next crackme in the same category... what about drawing a polygon via network packets ? :)
__imp__ Author 09. Nov 2007	This principle can be extended for a usual keygenme. Maybe someday I'll make that, but now I don't feel like to do it. Currently, I'm thinking about something more usual (and different at the same time), but it's going to take a long while to implement.
IMPosTOR 09. Nov 2007	1) 0040104D 68 2F7A0000 PUSH 7A2F change to 0040104D 68 7A2F0000 PUSH 2F7A 2) 004010A9 833D 2E324000 >CMP DWORD PTR DS:[40322E],-1 change to 004010A9 833D 2E324000 >CMP DWORD PTR DS:[40322E],0 offset correct?
TiGa 09. Nov 2007	If the previous comment wasn't such a good example of not reading the FAQ/Rules, it would have been deleted. Like it says in the crackme's description: And no patching, of course! Like it says in the FAQ: Don't write solutions in the "Discussion and Comments" section, however short or wrong they may be.
IMPosTOR 09. Nov 2007	And no patching, of course! sorry i send my tut without patching
TiGa 10. Nov 2007	and a nice video solution it is! It will be approved with the others in a day or two.
__imp__ Author 13. Nov 2007	Well done :) Probably, in a week or two I'll submit something else winsock-based, although not this easy.
Devoney 04. Dec 2007	Funny crackme. gives an insight to people who want to use sockets themselfes. Thanks, Devoney
D_Zirt 14. Feb 2008	Wow, that was easier than I thought it would be. My first crackmes.de crack XD. Fun one :p
ayeyen 18. Sep 2008	Wow, this is really smart. Good work! :)

IMPosTOR's IMPosTOR's Crack Me 0.5

Download IMPosTOR__s_Crack_me_0.5.zip, 14 kb (password: crackmes.de)
Browse contents of IMPosTOR__s_Crack_me_0.5.zip

Just patch and send tut to me ;)

This crack me have nag message, Unregistered :))
you must patch it, then you see Registered Message ...

impostor_76171@yahoo.com

NOTE : do not change Unregistered string to Registered string lol

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 12. Sep, 2007
Downloads: 457

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Solutions

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Discussion and comments

IMPosTOR Author 03. Dec 2007	i have one signature becuse my crack me cracked by shabgard group so i tell you one signature color message not RED must GREEN !
IMPosTOR Author 09. Dec 2007	okey guys another signature (final ,u can patch it) : no one can't find register function? ya my crack me have register function lol and check after all messages ;) 00403FF0 /$ 55 PUSH EBP now try to patch this function and dont change any thing good luck

indomit's brutme1

Download brutme1.zip, 16 kb (password: crackmes.de)
Browse contents of brutme1.zip

Find the correct string for goodboy msg ;)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 09. May, 2006
Downloads: 1004

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Solutions

Solution by thehyper, published 01. jul, 2006; download (26 kb), password: crackmes.de or browse.

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Discussion and comments

didnie 24. Jun 2006	This is a real easy job in OllyDbg. I did it in less than a minute
Ox87k 24. Jun 2006	didnie, have u make a bruteforcing or what? :)
megadoctor 26. Jun 2006	Shit Im too much of a newbie to crack this bitch... damn...
Ox87k 26. Jun 2006	sincerly me too! I made a bruteforce for it... btw i haven't the valid serial at this moment :[
thehyper 27. Jun 2006	I found it! after 1.5 hours of brute. lol
l0calh0st 29. Jun 2006	I coded my first ever bruter and it's running madly on my p3 from 4 hours without anything good..lol......Must buy a faster pc :P
Kostya 30. Jun 2006	Hmm... I have the same problem P3, my CPU spped: 800MHz... :(
TQN 01. Jul 2006	After 3 hours of brute on my computer, P4 3GHz, HT. I found only and only one serial.
Kerberos 02. Jul 2006	I found serial after 5 minuts of bruteforcing, but I've used 28 computers (Athlon XP 2500+ @ 1800MHz) and bruteforcer written in C++ and using MPI :)
TQN 02. Jul 2006	Hi Kerberos ! I don't known about MPI. What is MPI. I am rewriting the bruteforce app by uses multithread (creates 10 thread).
Kerberos 02. Jul 2006	Hi TQN : MPI is Message Passing Interface (http://www-unix.mcs.anl.gov/mpi/). Using MPI you can simply program parallel applications based on message passing. If you want I can send you C++ sources of my BruteForcer using MPI. I wanted to write solutions, but there is already one solution so another one from me is pointless :) 10 threads is nice idea, but you've to have 10 processors to have 10 times faster bruteforcer (or you've to run it on cluster(i.e. MOSIX) with load-balancing).
TQN 02. Jul 2006	Thank you very much, Kerberos ! I will read it. Does it only use for Unix platform ? I have only one PC, so hard to test it. Best regards,
Kerberos 02. Jul 2006	To TQN: You can use it under Windows too (there are implementations for Windows http://www-unix.mcs.anl.gov/mpi/mpich2/index.htm#download), but I've never used it under Windows, because I've access only to Linux computers. If you really want to test MPI(or PVM -- alternative to MPI), you can install VMWare and try comunication between host and VMWare virtual computer.
TQN 07. Jul 2006	My multithread bruteforce here: http://rapidshare.de/files/25152867/bruteme1_keygen.asm.html
indomit Author 09. Jul 2006	Nice solution, thehyper! And thanks to all who trying and bruting it %)

indomit's Findme

Download findme.zip, 5 kb (password: crackmes.de)
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Findme by indomit.

I offer my new puzzle to you :)

Rules are very simple:
1) Find correct serial;
2) No patching, no bruteforcing;
3) Write a small tutorial;

If you find some bugs or exploits, please report me :)

Regards,
indomit.

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 26. Feb, 2009
Downloads: 440

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by Cat2, published 08. mar, 2009; download (3 kb), password: crackmes.de or browse.

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Solution by simonzack, published 27. feb, 2009; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

c0nr4id3r 26. Feb 2009	If the serial is based on a random number, which is build with the current time, it isn#t real possible to find a correct serial, is it?
cyclops Moderator 26. Feb 2009	There is always a way. You have to dig deeper that's all!
simonzack Moderator 27. Feb 2009	cool crackme man, initially i thought it was impossible, but some minutes of thinking made me produce a correct code I noticed the two can just continue on, and there doesn't have to be an end :) thanks
simonzack Moderator 27. Feb 2009	hei, anybody need a solution? :p
indomit Author 27. Feb 2009	Surely we need your solution, simonzack! :)
indomit Author 27. Feb 2009	Very good solution, simonzack! Thank you :)
Cat2 08. Mar 2009	Hehe, that was a very cool crackme. I love how the numbers play catchup with each other. I'll be writing a solution :)

indomit's indoKGM1

Download indoKGM1.zip, 24 kb (password: crackmes.de)
Browse contents of indoKGM1.zip

Hello All!

This my first crackme and it very easy. Just find the correct serial,
create keygen, and write a small tut. =)
But it have TWO ways to key it:

1: For newbie: Find serial for your name
which make a goodboy message :)
2: For profi : Try to find name & serial
which make a VERY goodboy message %)

It was perfect if you try to create keygen without brute force.

And of coz, patches disallowed.
It hasn't any anti-debugger stuff...

Good luck! ;)

PS: Tested only on Windows XP SP2.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 21. Apr, 2006
Downloads: 1236

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Kostya, published 06. jul, 2006; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

BugHunter 25. Apr 2006	Hm, what is that VERY goodboy msg? Is it encrypted?
indomit Author 25. Apr 2006	No, It's not encrypted. Open exe in Hex-Editor and look at addresses 7900h-79A0h ;) Just goodboy msg - at 7D40-7DA0 :) But I think the VERY goodboy msg isn't reachable... But if u can to prove it... ;o)
Lesco 25. Apr 2006	Is it intended, that the entered serial is a factor in the calculation of the right serial for the normal goodboy message?
indomit Author 25. Apr 2006	2Lesco: Yes, it's my little idea. ;)
indomit Author 27. Apr 2006	It's booring? :/
treebug 30. Apr 2006	I enjoyed it. This was my first crackme. I see how it gets values for and uses the [name], [serial], [serial+name]. Then compares [name]+[name/serial] to the original serial. And I see where the final decision is made. But I haven't written a keygen for this yet.
indomit Author 10. May 2006	Anyone can create keygen? =) Need some hints? =)
Kostya 28. Jun 2006	2indomit: I did it.. :0)
indomit Author 09. Jul 2006	2Kostya, nice work, but in ur solution u wrote: >>If we repeat it ("last part gen time") 4 times we will get our correct second part of serial. Why exactly 4 times? %) I do not understand :)
Kostya 23. Jul 2006	No need to deep inside the code algo, I made this without it. ;) << Yeah, no needs to try harder if it works..>> Am I right?! And also it has no crypt algos [we can load it in PEiD and start "Krypto ANALyzer" plugin to see all known crypto signatures]. I entered serial first , then tryed to do it second. (simple math induction method) And then i realized that if we made the same actions 4 time we will have the results. So if we make > 4 or 4 times keygenning we will have this results. E.g: if we enter serial 1234567890123456 and generate real serial (for my name) first time we will have FC33DFB9XXXXXXXX, after checking it, this serial we will be wrong because after keygening there is block of code which generates second part (starting @ 004087C5, ends @ 00408819), it is based on the serial we have entered. So in conclusion I want to say that it simply depends on the Name and the serial we have entered before. But after keygening n times it will have key like FC33DFB95B588047 that after keygening by this block of code it will gen second part: 5B588047, SO we will have righ serial "FC33DFB9"+"5B588047". :) and the serial FC33DFB95B588047 will be correct! :) Hm...And what about keygen it doesn't work?! :) Something wrong!? Do u need source of my keygen!? (written in MASM32)

indomit's Key4me

Download key4me.zip, 25 kb (password: crackmes.de)
Browse contents of key4me.zip

I present you a new puzzle crackme.
I think it will be interesting. :)

Rules:
1. No Patching.
2. Write Keygen.
3. Be sure that your keygen will work for all names (important!) :)

PS: Please report me if you find any bugs, flaws or exploits :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 03. Jun, 2009
Downloads: 443

Rating

Votes: 11
Crackme is quite nice.

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Solutions

Solution by _MMx_, published 16. aug, 2009; download (52 kb), password: crackmes.de or browse.

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Solution by Lurking Pimpernel, published 08. jun, 2009; download (16 kb), password: crackmes.de or browse.

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Discussion and comments

papanyquiL 04. Jun 2009	very good code. this will be a tough one to figure out
The So;X 04. Jun 2009	ya agreed ....:)
T.0.R.N.A.D.0. 05. Jun 2009	internal class sirtet {...} So, that's a hint :p
Filler 06. Jun 2009	nice one indomit! very good code, difficult to figure out what's there going on in it :D
obnoxious 06. Jun 2009	mayb i like tetris better :)
Lurking Pimpernel 07. Jun 2009	Wow. Today June 6th is the 25-year anniversary of the game Tetris.
andrewl.us Moderator 07. Jun 2009	Sounds like some people are... putting the pieces together.. :P
simonzack Moderator 07. Jun 2009	at least somebody knows how to google :)
papanyquiL 07. Jun 2009	5000 pointssssssssssssssss -- Winner! Well, not yet at least...
andrewl.us Moderator 08. Jun 2009	Lurking Pimpernel's keygen is worth seeing in action!
indomit Author 08. Jun 2009	Lurking Pimpernel, good work! :) Thank you for your solution. Thank you all who tried and rated it :)
DigitalAcid 09. Jun 2009	The keygen crashes after ~500 deleted lines. I know, it should stop at 500, but there is no serial, it just crashes =).
_MMx_ 10. Aug 2009	From what the exception says it looks like you need .NET framework 3.5 to display the result, but 2.0 is enough to start the keygen ;-)

indomit's Ten coins

Download tencoins.zip, 5 kb (password: crackmes.de)
Browse contents of tencoins.zip

This keyme based on the problem of the 10 coins,
where over 3 weighing you must identify spurious coin,
and know it lighter or heavier.

The main task of this keyme is to find the multipurpose key,
that be right for _any_ name.
(it is not only one, but you may find one :))

Finding the key, suitable for one or some names is very easy,
but one for any name it is not the case.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 16. Oct, 2008
Downloads: 474

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by cyclops, published 21. oct, 2008; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

indomit Author 20. Oct 2008	To help you check your key, here are a list of names: nine, five, bad, name, nice, fake, one, three, trick, qwerty, bar, four, two, indomit, example, dozen, try, viva, foo, fly If your key be right for all the names from the list, it will be right for any other name. Good luck! =)
cyclops Moderator 20. Oct 2008	Yep! i just missed the last one...gonna change it by nite! kewl crackme indomit!
indomit Author 21. Oct 2008	Perfect tutorial, cyclops! Thank you for solution! :)
cyclops Moderator 22. Oct 2008	Thanx Indomit! And congrats to Crackmes.de for the 15K limit!
T.0.R.N.A.D.0. 20. Mar 2009	This was a really nice one. Thanx indomit. And thanx cyclops for the beautiful tut.

indomit's The Cattle Crackme

Download cattle.zip, 21 kb (password: crackmes.de)
Browse contents of cattle.zip

>>> The Cattle Crackme <<<

Rules are simple (as always):
1. No Patching.
2. No Brute Forcing.

Write a keygen (for best, if there are more than one solution)
or single key-file (for good) and a little tutorial.

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 23. Apr, 2009
Downloads: 435

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Solutions

Solution by T.0.R.N.A.D.0., published 29. apr, 2009; download (17 kb), password: crackmes.de or browse.

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Discussion and comments

T.0.R.N.A.D.0. 25. Apr 2009	@ indomit : Lot's of tedious equation solving and a bit of number theory. Good one ! :) I found the key that satisfies all conditions but you program reports an OVERFLOW error !! Sent you a PM.
T.0.R.N.A.D.0. 25. Apr 2009	The key file should be written as BINARY not TEXT. That's where I was wrong. Corrected now and got the good-boy !! Will post solution soon.
T.0.R.N.A.D.0. 25. Apr 2009	Solution uploaded :-)
indomit Author 30. Apr 2009	@ T.0.R.N.A.D.0. Nice solution and keygen! :)
Flid 19. Feb 2010	not interesting. It's just a Gauss algoritm and nothing else

InsaneFIDO's InsaneFIDO's Farewell UnWrapMe

Download FarewellUnWrapMe.zip, 244 kb (password: crackmes.de)
Browse contents of FarewellUnWrapMe.zip

This is my final UnWrapMe. I hope it is better than my previous one.

Once again the idea is to reconstruct the executable without the wrapper or loader.

I have tested it on XPSP2 and XPSP3 and it will run on both. So if it does not run on your machine then perhaps it has found something it does not like. Certainly the unwrapped part should run without problems.

If you use a firewall that hooks everything in sight such as COMODO then you may have problems running the app due to excessive hooking of system dll API calls.

It will NOT notify you that it is sulking at your set up and that it will not run. If it runs on Vista or Windows 7 I will be very surprised. I have no interest in those OSs.

Insane.exe is the executable to run.

I think that in difficulty it is probably a 3 on the crackmes.de website, although you may think differently of course.

Comments, criticisms and compliments are all welcome. Complaints should be directed to the four winds.

One point to note - on AMD XP 3000+ it took approximately 8-10 seconds to start, on AMD X2 5200+ it took 2-3 seconds to start.

Windows may occasionally report that the program failed to initialize properly because of an 80000003 error when in fact it ran quite happily. Sometimes this may occur and no window appear. Why Windows would do this is beyond my comprehension.

I do know that certain weaker AV products will balk at the name Insane.exe due to there being several malwares having the same name. I cannot be held responsible for lame AV products.

Cheers and farewell
InsaneFIDO

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 23. Mar, 2011
Downloads: 195

Rating

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Discussion and comments

EvOlUtIoN 23. Mar 2011	here both insane and fido does not run...XP sp3
redoC 23. Mar 2011	XP SP3 runs fine, anyway it's insane!

InsaneFIDO's InsaneFIDO's mp3 player KeyGenMe

Download InsaneFIDOs_KeyGenMe.zip, 362 kb (password: crackmes.de)
Browse contents of InsaneFIDOs_KeyGenMe.zip

This is my first attempt at a KeyGenMe app and is a simulation of a "real" app. I wrote an mp3 player in assembler as an exercise and produced a feature limited "unregistered" version and a fuller featured "registered" version. Apart from a small amount of code from an MCI example I am solely responsible for the code and noone else is to blame. The idea is to produce a fully working KeyGen to "register" the app. You will know it is registered when you run it and the menu button actually produces a menu instead of displaying the Splash screen.

cheers
InsaneFIDO

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Assembler

Published: 12. Jan, 2008
Downloads: 212

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Discussion and comments

Computer_Angel 13. Jan 2008	Cannot run it completely, It show the splash screen, wait a second then show a player UI and auto close program quickly ~.~. Could you check it again
soychino 13. Jan 2008	u should run it from a shortcut.don't run the exe directly.

InsaneFIDO's InsaneFIDO's UnWrap3

Download UnWrap3.zip, 207 kb (password: crackmes.de)
Browse contents of UnWrap3.zip

This is my latest attempt at a CrackMe. Once again it is very unlikely to tax the ingenuity of the more experienced reversers. I have called it an UnWrapMe again although unlike my previous offering the 'wrapped' code is inside the wrapper as opposed to a seperate file. The purpose of this small exercise is to rebuild a close approximation to the original executable, with little or no trace left of the wrapper, thus is very similar to unpacking.

The PC I used had on it windows XP with SP3 and program also ran on XPSP2 under VMWare. It is highly unlikely that this will work on Vista.

I hope you find it interesting.

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Assembler

Published: 05. Jun, 2009
Downloads: 220

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Discussion and comments

DizzY_D 08. Jun 2009	Not running @ Vista x64 :(
DigitalAcid 08. Jun 2009	"The PC I used had on it windows XP with SP3 and program also ran on XPSP2 under VMWare. It is highly unlikely that this will work on Vista." "Platform: Windows 2000/XP only" So yeah, probably doesn't work on Vista =).
tony 09. Jun 2009	very intresting
tony 09. Jun 2009	o! the tlscallback is very interesting . the size of tls table is zero.
tony 09. Jun 2009	no! not running in windows xp sp3
InsaneFIDO Author 11. Jun 2009	I have been told by two people that on their PCs sometimes it runs and sometimes it does not (XPSP2 & XPSP3). Why this should be I do not know.
simonzack Moderator 15. Jun 2009	does not work on mine, however I'll try to find out problem I pm'ed u thanks again for nice unpackme
DisasmDisease 15. Jun 2009	My Antivir says its a trojan!!!
InsaneFIDO Author 15. Jun 2009	My other UnWrapME was listed as a trojan by AVs. I sent very scathing emails to AV companies after that. Perhaps they just do not like me.
EvOlUtIoN 26. Jun 2009	As you know, i solved it some time ago...but too lazy to write a tut, goto snd forum for unwrapped. Anyway i think that 4 as difficulty is too much, i done it in less than an hour.
simonzack Moderator 27. Jun 2009	heh, that's quite fast did you analyze the whole thing or just memory dump? cause IAT is kinda easy to fix and oep easy to find
EvOlUtIoN 27. Jun 2009	Not analyzed all, but antidebug was quite interesting, i only took the fastest way to obtain a working unpacked file.

InsaneFIDO's InsaneFIDO's UnWrapME

Download InsaneFIDO_UnWrapMe.zip, 10 kb (password: crackmes.de)
Browse contents of InsaneFIDO_UnWrapMe.zip

Using similar wrapper concept to the Reflexive Wrapper used on games but I hope it is a little more difficult to reverse than that. On Windows XP the unwrapped file should display with the XP theme. Coded on XPSP2, may not work with W2000 but I hope it does.

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 29. Nov, 2007
Downloads: 175

Rating

Votes: 3
Crackme is good.

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Solutions

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Discussion and comments

EvOlUtIoN 01. Dec 2007	What is objective of crackme? Just run executable without any other file? Or what?
InsaneFIDO Author 01. Dec 2007	The object is to recover the wrapped exe file so that it is standalone rather than executed by the Insane.exe file.
EvOlUtIoN 03. Dec 2007	Ok, i found a way to do it...but it is hard for me to load it on debugger, so i wrote loader to allow me dump it.
EvOlUtIoN 03. Dec 2007	Yeah! Got it! Really nice unwrapme InsaneFIDO... hxxp://www.sendspace.com/file/tt8rnx Here it is a link of my dumped one, i will write a solution as soos as possible. I think it has a very very good idea to load and debug a temporary file, and also to virtualize some EP code and relocate import table.
InsaneFIDO Author 03. Dec 2007	EvOlUtIoN I'm glad you liked it. Your dumped file is nicely reconstructed. cheers InsaneFIDO
REA 04. Dec 2007	InsaneFIDO, nice unwrapme, look like nanomites in arm. Will tell ya when i got something new.
REA 05. Dec 2007	Hehe, done, nice things. I'll write a tuts soon. http://sharebee.com/a07d7be0
InsaneFIDO Author 05. Dec 2007	Thanks REA. I look forward to seeing yours and EvOlUtIoN's solutions. cheers InsaneFIDO
hardcoder 14. Jan 2008	Does any one help me with this function 004018B9 /$ 8B15 844D4000 MOV EDX,DWORD PTR DS:[404D84] ; kernel32.7C803518 004018BF \|> 8B02 /MOV EAX,DWORD PTR DS:[EDX] 004018C1 \|. 0305 5C454000 \|ADD EAX,DWORD PTR DS:[40455C] ; kernel32.7C800000 004018C7 \|. 8A00 \|MOV AL,BYTE PTR DS:[EAX] 004018C9 \|. 38C3 \|CMP BL,AL 004018CB \|. 74 06 \|JE SHORT Insane.004018D3 004018CD \|. 83C2 04 \|ADD EDX,4 004018D0 \|. 46 \|INC ESI 004018D1 \|.^ EB EC \JMP SHORT Insane.004018BF 004018D3 \> C3 RETN It seems it is scanning Export table of Kernel32.dll and when all is found throws an access violation application just terminates here. please any hint will be appreciated
InsaneFIDO Author 14. Jan 2008	hardcoder I sent a reply to your private message but if it still does not help send me another message. cheers InsaneFIDO

Solution by taviso, published 04. jan, 2006; download (3 kb), password: crackmes.de or browse.

taviso has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

iNViSi8LE's iNViSi8LE Crack Me v2.0

Download iNViSi8LE-Crack-Me-v2.0.zip, 9 kb (password: crackmes.de)
Browse contents of iNViSi8LE-Crack-Me-v2.0.zip

Rules: Just bypass the login and get forms says "Cracked"
I have only used own protection tricks to protect it from various decompilers.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 01. Nov, 2012
Downloads: 379

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by SoN, published 06. nov, 2012; download (36 kb), password: crackmes.de or browse.

SoN has rated this crackme as quite nice.

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Discussion and comments

Iran's iran's keygenme

Download iranskg2.zip, 42 kb (password: crackmes.de)
Browse contents of iranskg2.zip

this is my 2nd keygen me !
keygen it - make small soul + send ur keygen + source to black.byte@linuxmail.org and give the source :D

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 09. Dec, 2005
Downloads: 1056

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Solutions

Solution by EsKiMo, published 10. jan, 2006; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

Rapido 23. Feb 2009	can anyone write a full tutorial with full detail? thanks

Iron's iCrackme 1

Download iCrackme_1.zip, 19 kb (password: crackmes.de)
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Well, tell the program to say "Le programme a peut-être était cracké :)" without renaming the crackme in 'msgbox.exe'. I am sorry, but it's in French.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 10. Apr, 2009
Downloads: 2521

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Solutions

Solution by Raytheon, published 13. apr, 2009; download (21 kb), password: crackmes.de or browse.

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Solution by T.0.R.N.A.D.0., published 13. apr, 2009; download (40 kb), password: crackmes.de or browse.

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Discussion and comments

T.0.R.N.A.D.0. 11. Apr 2009	"without renaming the crackme in 'msgbox.exe'. I am sorry, but it's in French." This is a hint :) Solution uploaded.
bloody!ce 25. May 2009	very basic . Because the submission of solutions is closed , here is mine : http://butl9r.de/icrack.htm
papanyquiL 26. Sep 2009	lol, so easy... just requires a single NOP...

Iron's iCrackme 2

Download iCrackme_2.zip, 21 kb (password: crackmes.de)
Browse contents of iCrackme_2.zip

Keygen it, even if the GUI looks bad !

~ Made in C / C++ with WinApi ~

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 13. Apr, 2009
Downloads: 425

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Paul.Flyte, published 18. apr, 2009; download (3 kb), password: crackmes.de or browse.

Paul.Flyte has rated this crackme as quite nice.

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Discussion and comments

twist2b 16. Apr 2009	Very easy, but fun. Thanks for the fun.
T.0.R.N.A.D.0. 16. Apr 2009	adler32( Serial( "T.0.R.N.A.D.0." ) ) = 8c012d04
Ganoes Paran 11. Jun 2009	user Ganoes pass DUrEr wierd pass lol
TheTyphoon 21. Sep 2012	Yep ! My first one got it ! Name: wwwwwwwww Serial: VNUVs Thanks on this one :)

iSSoGoo's .dll .disaster

Download dll_disaster_issogoo.zip, 25 kb (password: crackmes.de)
Browse contents of dll_disaster_issogoo.zip

Task:
In this Crackme I wanted to show you how you could use some 'leftovers' to exploit a program.
Your task is to find the right place to 'inject' your .dll file and let the program show the goodboy-message.

Rules:
The rules are simple: Don't change anything (neither the .exe nor the .dll that are included)!
No Patching, no loaders, no WriteProcessMemory etc.
I wrote my own solution and it's less than 20-30 lines of code (Assembler).

Notes:
This one is easy, so it's doable for beginners, too. It has a 2/10 rating, but I thinks somewhere between 1 and 2.

Tested under:
'Win7 SP1 x64' and 'WinXP SP3'

Contact:
issogoo(at)gmail.com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 09. Apr, 2013
Downloads: 170

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Solutions

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Discussion and comments

iSSoGoo Author 12. Apr 2013	Mhh, sounds interesting, but there are two problems: 1. It's against the rule "Don't change anything"! You are only allowed to change things on the "User-Side" (The Textbox and the button). 2. Even if you were allowed to change the value at that address to zero (or whatever you want) it won't work ;)
iSSoGoo Author 12. Apr 2013	2. ...at leat "MOV [00403282], 0" would not result in "00000000" ;)
zairon Moderator 12. Apr 2013	I accidentally removed the first message, sorry. The user suggested to solve the crackme using a "MOV [00403282], 0" patch
redoC 12. Apr 2013	I can confirm that dll leftovers are often treacherous :o))) inject_here.dll:DllMain() ... dwSerial = DWORD[0x403282] + 0x00CAFFEE; sprintf (szSerial, "%08X", dwSerial); SetDlgItemText (hDlg, 2001, szSerial);
iSSoGoo Author 12. Apr 2013	@redoC Well done ;) You even dodged my little Anti-Debugging protection, or used the right plugin ;)

iSSoGoo's KeygenMe #3

Download issogoo_keygenme_3_fixed.zip, 45 kb (password: crackmes.de)
Browse contents of issogoo_keygenme_3_fixed.zip

Intro:
------
After solving TDC's 'CrackME [#4]' I was a bit disappointed that it wasn't a KeygenMe, but only a PasswordMe.
So I used the main routine to make a KeygenMe.

Note:
-----
The code is pretty clear and easy to understand, but to write a proper keygen you must have some brains!
After all I know a bit bruteforcing is necessary, but you can easily generate multiple keys per second, so nothing too difficult.

Rules:
------
No patching, self-keygenning (is this even possible?) or anything else.
A valid solution includes a proper keygen and a little tutorial.

Medals:
-------

Bronce:
- ???

Silver
- Write a 'stupid' Keygen & Tutorial

Gold:
- Write a 'smart' Keygen & Tutorial

Platinum (if possible):
- Write a keygen that needs no bruteforcing

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 29. May, 2014
Downloads: 401

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by hit02, published 29. jul, 2015; download (69 kb), password: crackmes.de or browse.

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Solution by tr4ceflow, published 01. jul, 2014; download (124 kb), password: crackmes.de or browse.

tr4ceflow has rated this crackme as boring.

Solution by grayfox, published 01. jul, 2014; download (2 kb), password: crackmes.de or browse.

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Solution by Kirjava, published 09. jun, 2014; download (94 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

tr4ceflow 29. May 2014	ok, understanding the disassembly is done within 5 minutes. I am pretty sure that there isn't a no-bruteforcing-way.
iSSoGoo Author 29. May 2014	I think I made a little mistake with the buffersize, will upload a fixed version very soon!
r0bert 29. May 2014	No problems with the keygenme, i found a plethora of valid keys from bruteforcing...
givses 01. Jun 2014	The keygen is about bruteforcing. Not about calculus & stuff. There are 2 bytes to match.
redsees 03. Jun 2014	so what's a 'stupid' and a 'smart' keygen? how can I rate mine to be any of them?
r0bert 03. Jun 2014	redsees, i thought about that myself. I figured 'stupid' and 'smart' refer to the keygens level awareness on how the key is validated. I initially thought that a smart keygen meant no bruteforcing, until i saw the Platinum section... hmm... I concluded this..: stupid: Since the serial validation portion can be ripped from the assembly listing, a 'stupid' keygen could simply throw a serial at the validation routine and check whether it passed or not. This could be likened to black box testing: the keygen has no awareness of the logic involved in the validation process (it does not need to). smart: A smart keygen would involve understanding what is required to produce a valid key (white box), then rewrite the logic involved in the validation process (based upon the assembly). to rate your keygen: did you simply rip the asm byte for byte and throw random serials at it? -> silver did you understand the validation routine and rewrite it in your own code? -> gold did you write a keygen that doesnt bruteforce -> platinum or, i speak a bunch of garbage and the author had something else in mind ;)
iSSoGoo Author 03. Jun 2014	A 'silver' rated keygen for me would be if you simply bruteforce the whole serial. The probability for finding a valid serial in that case would be 1:65536. So yes, this is some kind of blackboxing. But as far as I know a valid serial can be found slightly faster. It's not that much faster and you still have to use bruteforcing, but it's faster ;)
tr4ceflow 04. Jun 2014	One can simplify the validation algorithm up to only 30 lines of beautiful easy c++ code. You only have to bruteforce the last 4 characters for a stupid keygen. At least to compute a valid serial without bruteforcing you have to solve a linear equation system having non-linear constraints. Well this is a bad keygenMe since there does not exists a serial beginning with "tr4cefl" ;-) But you can test something like: tr4cefqijL tr4ceftRzL tr4cefuUzL ... A samrt way is to leave the last 4 characters empty and compute them from the first 6 characters.
tr4ceflow 04. Jun 2014	In fact you only have to test 3844 to get a valid serial.

iSSoGoo's Triangle KeyGenMe

Download trianglekeygenme_issogoo.zip, 6 kb (password: crackmes.de)
Browse contents of trianglekeygenme_issogoo.zip

Rules:
1. Don't patch anything!
2. Don't make a serialfisher!
3. Don't make it self-keygenning!
4. Write a KeyGen
5. Write a nice tutorial

Achievements:

Bronze:
- Rip the code to make a KeyGen

Silver:
- Code your own program

Gold:
- Code your own program
- Find out why it's called 'Triangle KeyGenMe'

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 18. Jul, 2013
Downloads: 317

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by Mr. eXoDia, published 25. jul, 2013; download (124 kb), password: crackmes.de or browse.

Mr. eXoDia has rated this crackme as quite nice.

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Discussion and comments

iSSoGoo Author 25. Jul 2013	Very good solution Mr. eXoDia, I like it ;)
CrackMyAss 25. Jul 2013	why my comment was deleted? improper to simply give the name/serial? ?
iSSoGoo Author 25. Jul 2013	Yes ;) Your comment was probably deleted by a moderator since it will not be well-received if you post name/serial combinations in the comments.
zairon Moderator 25. Jul 2013	Sorry bu we have rules.. check out our FAQ page.

IXORI's Credo KeygenMe #1

Download KeygenMeCredo.zip, 7 kb (password: crackmes.de)
Browse contents of KeygenMeCredo.zip

This is my first keygenme.

I'm not quite sure about the difficulty but I think 2 will do.

[ Rules ]

1) No patching.
2) Serial fishing is allowed, however, the serial will not work on someone else's computer. Once you debugged the keygenme, you will understand me. <--- * HINT *
3) Selfkeygenning is not allowed.
3) A keygen is the only valid solution and if you have some extra time, write a tutorial.

[ Credits ]

1) Instinct949 - for testing this keygenme.

That should be it. I hope you guys will enjoy and please rate.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 30. Apr, 2014
Downloads: 318

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Solutions

Solution by Duraven, published 15. may, 2014; download (214 kb), password: crackmes.de or browse.

Duraven has rated this crackme as nothing special.

Discussion and comments

basscode 01. May 2014	Why didn't you compile it via /MT and 90 toolset.
Duraven 05. May 2014	Hello, thank you for creating a very nice and smooth crackme :) I'm about to write a small tut about the app, but could you please recompile it with ASLR disabled so I can make sure a user will have the same addresses as me? (check out http://msdn.microsoft.com/en-us/library/bb384887.aspx)

[_j_]'s cerebus

Download cerebus_keygenme.zip, 20 kb (password: crackmes.de)
Browse contents of cerebus_keygenme.zip

write your own keygen

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 27. Dec, 2005
Downloads: 748

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Solutions

Solution by Ank83, published 04. jan, 2006; download (16 kb), password: crackmes.de or browse.

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Discussion and comments

Ank83 28. Dec 2005	My first internal keygen was for this crackme ! :) But rules are rules ! This is a good crackme, i think i understeand how the serial is generated, but it's prety long algoritam, so i dont even think about starting to write a keygen !
DeepBlue 28. Dec 2005	Strip ASM Code and use it Inline?
[_j_] Author 28. Dec 2005	Wouldn't it be more satisfying not ripping the asm?
DeepBlue 28. Dec 2005	yeee, but quite a work :<
[_j_] Author 04. Jan 2006	Ank83: dude your solution is an internal keygen.....that was supposed to be not allowed...
Ank83 04. Jan 2006	To be honest I first I rip the procedure to get the magic string thay is used latter in the procedure of compliting the serial. 0040253C \|> 0FB6542B C8 /MOVZX EDX,BYTE PTR DS:[EBX+EBP-38] ; \| 00402541 \|. 43 \|INC EBX ; \| 00402542 \|. 88D0 \|MOV AL,DL ; \| 00402544 \|. C0F8 04 \|SAR AL,4 ; \| 00402547 \|. 83E2 0F \|AND EDX,0F ; \| 0040254A \|. 66:0FBEF0 \|MOVSX SI,AL ; \| 0040254E \|. 89F0 \|MOV EAX,ESI ; \| 00402550 \|. 04 61 \|ADD AL,61 ; \| 00402552 \|. 8881 D0634000 \|MOV BYTE PTR DS:[ECX+4063D0],AL ; \| 00402558 \|. 88D0 \|MOV AL,DL ; \| 0040255A \|. 04 61 \|ADD AL,61 ; \| 0040255C \|. 8881 D1634000 \|MOV BYTE PTR DS:[ECX+4063D1],AL ; \| 00402562 \|. 83C1 02 \|ADD ECX,2 ; \| 00402565 \|. 83FB 20 \|CMP EBX,20 ; \| 00402568 \|.^72 D2 \JB SHORT Internal.0040253C ; \| 0040256A \|. 66:8935 B26040>MOV WORD PTR DS:[4060B2],SI ; \| 00402571 \|. BB 40000000 MOV EBX,40 ; \| 00402576 \|. BF D0634000 MOV EDI,Internal.004063D0 ; \|ASCII "egdiagak]h`a^e]i\n`ndc[k`lac`a\pglbjak_f^iho]bcfdcfgfc_p\dbp[g]k" 0040257B \|. 891D B4604000 MOV DWORD PTR DS:[4060B4],EBX ; \| 00402581 \|. 31DB XOR EBX,EBX ; \| 00402583 \|. 66:8915 B06040>MOV WORD PTR DS:[4060B0],DX ; \| 0040258A \|. 897C24 04 MOV DWORD PTR SS:[ESP+4],EDI ; \| 0040258E \|. C70424 D062400>MOV DWORD PTR SS:[ESP],Internal.004062D0 ; \|ASCII "\a[capab[pggZj]i\n`ndc[k`lac`a\pglbjak_f^iho]bcfdcfgfc_p\dbp[g]k" 00402595 \|. E8 E6130000 CALL <JMP.&msvcrt.strcpy> ; \strcpy 0040259A \|> B9 D0624000 /MOV ECX,Internal.004062D0 ; ASCII "\a[capab[pggZj]i\n`ndc[k`lac`a\pglbjak_f^iho]bcfdcfgfc_p\dbp[g]k" But then i said to my self wtf and I rip the hole code. So belive me that is not an internal keygen but a ripped code ! To write a keygen for this crackme you got to work at least a month on this crackme ! I belive that source of crackme is more that 5 pages of code. A keygen will be 10 ! So I was bad I ripped the code, and if that's not ok let the moderator take down the solution. Sorry for not playing by the rulez Reards Ank83

[_j_]'s demeter keygenme

Download demeter.kgnme.j.zip, 43 kb (password: crackmes.de)
Browse contents of demeter.kgnme.j.zip

Step 1. write a keygen
Step 2. ???
Step 3. Profit!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 17. Mar, 2008
Downloads: 683

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Solutions

Solution by andrewl.us, published 20. apr, 2008; download (83 kb), password: crackmes.de or browse.

andrewl.us has rated this crackme as quite nice.

Discussion and comments

[_j_] Author 08. Apr 2008	any takers? It's RSA incase anyone is interested....
Zaphod 10. Apr 2008	I tried to solve the crackme but couldn't, so I decided to give it a rest and return to it later...

[_j_]'s Hades

Download hades_keygenme.zip, 19 kb (password: crackmes.de)
Browse contents of hades_keygenme.zip

Write your own keygen

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 10. Jan, 2006
Downloads: 746

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Discussion and comments

[_j_]'s JUNo

Download juno.kgnme.zip, 31 kb (password: crackmes.de)
Browse contents of juno.kgnme.zip

Create a keygen using every possible method at your disposal

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 03. Aug, 2006
Downloads: 707

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by andrewl.us, published 29. may, 2008; download (112 kb), password: crackmes.de or browse.

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Discussion and comments

[_j_]'s MARs

Download mars.kgnme.j.zip, 100 kb (password: crackmes.de)
Browse contents of mars.kgnme.j.zip

Create a working keygen :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 16. Mar, 2007
Downloads: 659

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Solutions

Solution by cyclops, published 23. nov, 2007; download (60 kb), password: crackmes.de or browse.

cyclops has rated this crackme as quite nice.

Discussion and comments

[_j_] Author 27. Mar 2007	m@rio_crk of mbe has spotted a bug: "I found that you only need to input "3" in second line and the first number in 3rd line of userkey.txt to make it registered." Disregard this bug, it's not a valid solution. Otherwise, any takers?
[_j_] Author 09. Sep 2007	Anyone ever gonna take a shot at this one?
HMX0101 10. Sep 2007	Mate, don't know if this a bug... You only check, if keyfile_line3 = (keyfile_line1 ^ const_ % SHA512(HDD-SN) [hash must be prime, so it will add 1 until it becomes a prime])... so keygenning only consist in ripping/imitate routine... That's which you want?
[_j_] Author 22. Oct 2007	Yeah, not sure that'll work, if you get it right though then by all means submit it
cyclops Moderator 29. Oct 2007	Is it solvable? It has runtime 512bit (prime-1) factorisation used for runtime solving(3^x%prime, x=255 bits). I know 2 other ways to solve (cheating, but no patching :P and other than mario's).
[_j_] Author 07. Dec 2007	Woh, didn't notice cyclops had posted a solution until now. Nice work buddy!

[_j_]'s Minerva

Download minerva.kgnme.j.zip, 32 kb (password: crackmes.de)
Browse contents of minerva.kgnme.j.zip

Just write a keygen :P

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Unspecified/other

Published: 07. Apr, 2006
Downloads: 515

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Solutions

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Discussion and comments

[_j_] Author 10. Oct 2015	https://github.com/jgericke/RCE/blob/master/2006.04.07.minerva/minerva.dpr ...in case anyones interested :)

[_j_]'s PALLAs

Download pallas.kgnme.j.zip, 34 kb (password: crackmes.de)
Browse contents of pallas.kgnme.j.zip

It was put together kind of quickly, keygen it anyway you want.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 20. Aug, 2006
Downloads: 660

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by cyclops, published 28. oct, 2007; download (70 kb), password: crackmes.de or browse.

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Discussion and comments

SaXoN 20. Aug 2006	Nice... Good to see crackmes on a sunday too, i dont see that so often :D
geeko 23. Aug 2006	just a patch at addr 4027e0 change 75 to 74 and any key is working (as your proggy sais) ! ?!?
zairon Moderator 23. Aug 2006	No geeko, you have to keygen it... :p
geeko 24. Aug 2006	I am too lazy to reverse an encription routine, since there is a simpler way to crack
[_j_] Author 24. Aug 2006	Reversing it should be pretty simple too :P Patch is not a valid solution, the protection is designed around keygeneration, not against modification.
cyclops Moderator 25. Aug 2006	Its doing some big num calc using Miracl..... I wil try if i got some time....
jB_ 29. Aug 2006	This idea has already been used by Amenesia for his great opensource keygenmes. It is a pity that you use it without bringing anything new, and that the RSA problem can be solved using bruteforce only (no need for a better attack).
[_j_] Author 01. Sep 2006	I didn't realise there were open source crackmes using the exact same scheme, like i said this was put together really quickly and I'll admit the idea isn't really a new one. Try my harder crackmes for what I'd like to consider my own original ideas :)
mindless 07. Nov 2007	I just solved it and I liked it... However I don't get why the author didn't use a standard algorithm for the hash function but modified the SHA1 one. Anyway I understood much better the low exponents problems in RSA, and the wiener attack. @jB: how could you break this crackme by bruteforcing? what would you exactly bruteforce? Thanks!

[_j_]'s stOoPiD

Download stoopid-keygenme-j.zip, 88 kb (password: crackmes.de)
Browse contents of stoopid-keygenme-j.zip

it's kinda stupid...keygen it :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 25. Aug, 2009
Downloads: 490

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Solutions

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Send a message to j00ru »

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Discussion and comments

-Lord Virus- 13. Sep 2009	no solutions yet?. Ok. let's get this party started. jojojo.
[_j_] Author 20. Sep 2009	So, any takers?
andrewl.us Moderator 22. Sep 2009	call @41843E appears to rijndael_decrypt() the decoded serial using the md5(computer_name) as the key... however, instead of returning just the plaintext, it takes the last byte of the plaintext and makes the returned string this long (taking with it whatever junk is left on the stack) example: serial "MTIzNDU2Nzg5MDEyMzQ1Ng==" decodes to string "1234567890123456" which is "\x31\x32...\x36"... exactly one block... when decrypted, I get back "\xb4\xaf...\xbd" (verified using other rijndael implementations)... however, the returned string is NOT one block long, it's 0xbd bytes long, and everything after the 16'th byte is random stack junk
[_j_] Author 23. Sep 2009	:P fully attributed to the nasty library being used to handle rijndael, and the wierd way it deals with delphi strings. The encoding is performed by default. Can send the keygen if necessary.

j00ru's CrackMe 1.0 ( 32bit hash ) by j00ru!

Download secure.zip, 5 kb (password: crackmes.de)
Browse contents of secure.zip

CrackMe wrote in clear C.
I used my new 3bit hash algo in it.
Patching is not allowed.
Finding the collision is not so hard, i think.
Have Fun & Good Luck

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 10. Dec, 2005
Downloads: 238

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[j0b]'s ucfcrk2

Download ucfcrk2.zip, 2 kb (password: crackmes.de)
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dongle crackme, with a beautiful solutio...

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jul, 2002
Downloads: 1060

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Solutions

Solution by ak kort, published 11. jul, 2002; download (44 kb), password: crackmes.de or browse.

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j0shByte's j0sh's_Crackme1

Download cme1.zip, 64 kb (password: crackmes.de)
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1. Disable stupid nag
2. Make keygen.

No packer,and no antidebug/antidisasm tricks present.
Dont let program flow confuse you.
Enjoy :)

j0shbyte@gmail.com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 24. Aug, 2007
Downloads: 694

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Votes: 3
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Solutions

Solution by XzzX, published 27. aug, 2007; download (313 kb), password: crackmes.de or browse.

XzzX has rated this crackme as quite nice.

Solution by alex_ls, published 26. aug, 2007; download (99 kb), password: crackmes.de or browse.

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Send a message to j2innet »

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Discussion and comments

br0ken 24. Aug 2007	Hi, does this have fake algo? [it's hard to figure out when you're a newbie] There's a cmp --> jnz which is ALWAYS taken even if the serial is correct.
j0shByte Author 24. Aug 2007	I don't want to put spoilers here so i can't tell you. but dont let that thing confuse you:)
alex_ls 24. Aug 2007	I like this crackme, its exactly corresponding to level difficulty and will be useful for beginners in reversing area like me. I've send solution and KeyGen. Nice work j0shByte
XzzX 24. Aug 2007	Nice crackme. Solution is on it's way. ;-)
j0shByte Author 27. Aug 2007	great job guys.I like your solutions.

j2innet's j2crackme01

Download j2crackme01.zip, 10 kb (password: crackmes.de)
Browse contents of j2crackme01.zip

Difficulty Level: 1 (very easy, no packer, no anti debug, )

Language: Any

Rules : * Every thing allowed, In order to make a working keygen
* Selfkeygen is not allowed
* KEYGEN IS REQUIRED
Prizes: Gold - video tutorial

Silver - text tutorial

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 06. May, 2009
Downloads: 1026

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by indivisible_int, published 05. jun, 2009; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

j2innet Author 21. Apr 2009	thanks for downloading :P
j2innet Author 22. Apr 2009	seems like everyone abandon this cm. should i give some hints? hope u guys dun rate it as boring
j2innet Author 24. Apr 2009	no one wants hint.
obnoxious 25. Apr 2009	ok tell me what the gudboy sd be a number or a string??
ccxxsunny 25. Apr 2009	i'm a newbabie... after watching for 1 hour. finally know the string length limit. continue...
j2innet Author 25. Apr 2009	the input = anything from ur keyboard the output = numeric
j2innet Author 25. Apr 2009	crackers from higher level are welcomed too. ^_^
obnoxious 26. Apr 2009	huh so thers no goodboy msg just a serial length check ?????
Peroxaide 27. Apr 2009	I don't think we understand what we're supposed to do -- By the looks of it, you input a userID, it outputs a PassID; You press the return key and the program exits. There's no distinctive place to input a serial. This is what's confusing us.
j2innet Author 29. Apr 2009	oh, i think u are right. i will recompile a new one with key generated and let user to key in.
j2innet Author 06. May 2009	hi obnoxious/peroxaide, this version require u to key in the right passid.
jz__ 07. May 2009	so, i need mfc80.dll and msvcp80.dll and more to run this exe... would u upload necessary dlls too?
j2innet Author 07. May 2009	here http://blogs.msdn.com/nikolad/archive/2006/04/11/Download-location-for-VCRedist.aspx or here http://www.microsoft.com/download/j2crackme01.zips/details.aspx?FamilyId=32BC1BEE-A3F9-4C13-9C99-220B62A191EE&displaylang=en
c0nfig 09. May 2009	Solved by KeyFishing. User: userddd Key: 4936161 Working on keygen now)
LAS3R 10. May 2009	one easy way to get good boy message, just tupe name under 4 char and serial 'invalid input' ;P
Sy1ux 10. May 2009	Also solved and working on a keygen. User: Seelachs Key: 13809262
j2innet Author 12. May 2009	someone found the mechanism of this crackme. his name is indivisible_int. he hasn't post any comment in this thread. my conversation with him-> "yah. you found it. the (password length)==(input length) the password is filled from series of state machines. each character password is filled by one state machine." most cases, the goodboy key is always one line of code. to find the goodboy key generator is the challenge.
j2innet Author 12. May 2009	thxs to c0nfig and Sy1ux. ganbatte(hardworking in jpn)!! hope it gives u satisfaction!!
skynetuniverse 01. Jun 2009	Can some one tell me what the KiFastSystemCallRet does?? Thanks
indivisible_int 01. Jun 2009	hm... I just guessed about multithreading)) But I'm newbie and don't know how to see what this threads do with the userid...
indivisible_int 02. Jun 2009	LAS3R: you want to say 'less or equal 5 char'?
j2innet Author 16. Jun 2009	welldone indivisible_int, u found the goodboy's DNA.
indivisible_int 05. Jul 2009	Thanks to all, it's my first solution))

j4cbo's confound

Download confound.tar.gz, 92 kb

This is a small but deeply twisted keygenme. It was written in a mix of two very unusual programming languages and compiled with my own custom compiler and runtime. Windows PE and Linux ELF binaries are included.

confound, confound.exe - easy mode.
confound2, confound2.exe - if you think you're pro.

Both versions implement exactly the same algorithm and are compiled from the same source code. Some extra optimization passes were used on the first version; see if you can do without.

A valid solution is a concise description of the criteria this binary uses to recognize strings. You should be able to fully describe the requisite conditions in less than twenty words.

Difficulty: 5 - Professional problem to solve
Platform: Multiplatform
Language: Unspecified/other

Published: 16. Jul, 2010
Downloads: 174

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ja187's VCrackme1

Download vcrackme1.zip, 2 kb (password: crackmes.de)
Browse contents of vcrackme1.zip

- DYNAMIC SMC
- SIMPLY DATA CRYPTO
- SIMPLY SERIAL CHECKING
- ANTI-DEBUGGING TRICK
- LITTLE CODE OBFUSCATION

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 09. Dec, 2005
Downloads: 609

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Yosh64, published 15. dec, 2005; download (2 kb), password: crackmes.de or browse.

Yosh64 has rated this crackme as quite nice.

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Discussion and comments

Yosh64 15. Dec 2005	wasn't a bad crackme, all the BIT tests were cool for a change, maybe would have been more fun with tougher code protection???
ja187 Author 07. Jan 2006	Maybe the next crackme will be tougher... At least I think so...;) Anyway thanks for attention.

jamesinuk's JamesCrackme V2

Download James__sCrackmeV2.zip, 255 kb (password: crackmes.de)
Browse contents of James__sCrackmeV2.zip

James's Crackme V2

Still very easy
New serial genoration codes and some other stuff....

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 31. Jan, 2008
Downloads: 1369

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Solutions

Solution by mjones, published 14. feb, 2008; download (399 kb), password: crackmes.de or browse.

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Solution by IMPosTOR, published 05. feb, 2008; download (1443 kb), password: crackmes.de or browse.

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Solution by cosmos, published 05. feb, 2008; download (77 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

fromTurkey 31. Jan 2008	hi jamesinuk! i have found the serial :) , but what will i do know...:) do i write a keygen for this or just get the password.. also i couldnt extract your keygen file....?? i couldnt understand it... Thanks for all...
TiGa 31. Jan 2008	Write a keygen with solution
jamesinuk Author 31. Jan 2008	Ill email the keygen to you :D And if you can write a keygen for it !
qwertydid 01. Feb 2008	I've sent you a keygen now jamesinuk, too tired to write a tutorial... Thanks for this great keygenme! ;)
IMPosTOR 02. Feb 2008	ops i make keygen try to make video tut ;)
Encrypto 03. Feb 2008	ive submitted solution + tut :) which is video
shade45 05. Feb 2008	Nice crackme I liked it. Not to much harder than your last one but still fun.
TiGa 06. Feb 2008	IMPosTOR and Encrypto's video solutions have been added to the video site in the crackmes.de section. http://video.reverse-engineering.net/index.php?cat=16
deskyet 06. Feb 2008	Thanks for the crackme. I seriously need some good tutorials. I did this in 90 mins, but its to long if I look what the algorithm is. James I PM you !
IMPosTOR 07. Feb 2008	@Tiga tnx @deskyet read my message

jamesinuk's James'sCrackMe

Download james__scrackme.zip, 233 kb (password: crackmes.de)
Browse contents of james__scrackme.zip

This is my first crackme well keygen me ive ever made so its proberly rubbish or really easy, but i would like you to have a go at cracking it and unlock the password protected keygen inside!The keygen dose not include the source code.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 20. Jan, 2008
Downloads: 1502

Rating

Votes: 9
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Solutions

Solution by shade45, published 21. jan, 2008; download (7 kb), password: crackmes.de or browse.

shade45 has rated this crackme as nothing special.

Solution by Computer_Angel, published 21. jan, 2008; download (9 kb), password: crackmes.de or browse.

Computer_Angel has rated this crackme as nothing special.

Solution by klefz, published 05. feb, 2008; download (194 kb), password: crackmes.de or browse.

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Solution by IMPosTOR, published 21. jan, 2008; download (531 kb), password: crackmes.de or browse.

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Solution by cosmos, published 21. jan, 2008; download (6 kb), password: crackmes.de or browse.

cosmos has rated this crackme as nothing special.

Solution by br0ken, published 21. jan, 2008; download (33 kb), password: crackmes.de or browse.

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Discussion and comments

br0ken 20. Jan 2008	Plain and simple. Thank you :)
halsten 20. Jan 2008	Simple and easy, I have to say. :)
IMPosTOR 20. Jan 2008	ya so easy ,make video tut with delphi source ...
shade45 20. Jan 2008	Thank You! Nice and easy :) I think I will write a solution now.
Computer_Angel 21. Jan 2008	Nice, just for relax at the weekend
jamesinuk Author 22. Jan 2008	Go for it mate!
jamesinuk Author 23. Jan 2008	Ive gon through all you soultions, and youve all done very well! Give ya selfs a pat on the back!
PinguGroup 24. Jan 2008	hi and Thank you i think its perfect for a noob like me :) i made it after about 2hours and i have a keygen too :-D
deskyet 07. Feb 2008	easy, thanks James.
s0uThp4rk 18. Feb 2008	quite easy, i'm just starting out, but it still only took me about 5 mins to get the serial.. Thanks though!
E1xis 16. Mar 2008	I'm a noob but it was great to practice how to understand what's going on in the code. Thx.

jamesinuk's James's Crackme V3

Download James__sCrackmeV3.zip, 139 kb (password: crackmes.de)
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James's Crackme V3

My third crackme
This was originally designed to be for a encryption program i made but i never got round to fully finishing it
so i decided to transform it into a crackme/keygenme.

Find the authorization number anyway possible

You can-.patch it
.self keygen it
.brutefource (if you have several days to spare!)
.find the auth number in olly

If you’re feeling smart make a keygen and a tutorial for it!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 28. May, 2008
Downloads: 495

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by DigitalAcid, published 03. jun, 2008; download (154 kb), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 28. May 2008	This was a nice and interesting crackme. Waiting for your next one ;).
jamesinuk Author 28. May 2008	#Important!# You need to make the canvas in MS paint as big as you can becuse it draws slightly below the standard canvas size. Also there is quite a sly trick to prevent you from getting the website password!
Thorwak 29. May 2008	Really fun and different crackme! So fun in fact I took the time to register to this site finally (Hi ppl!) I took easy way out and patched it. The hardest part was actually the bug :D Maybe you should resubmit the crackme with corrected delays? Might try to (self)keygen it too if my interest doesn't get diverted elsewhere :)

jamesinuk's James's Crackme v4

Download James__s_Crackme_v4.zip, 130 kb (password: crackmes.de)
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James’s Crackme v4

This is a test of observation. You must manipulate this crackme (without patching) until you get the success message.

Once you have managed to solve this crackme, write a tutorial.

You need an internet connection by the way…but since you downloaded this anyway…it’s all good.

Good luck, James

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 01. Dec, 2008
Downloads: 320

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Solutions

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Send a message to jammmie999 »

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Discussion and comments

mjesun 08. Dec 2008	From Netherlands huh?
jamesinuk Author 14. Dec 2008	Nope, its just the file that is hosted there on my friend's server.
aout 17. Dec 2008	Any hints on how to handle ugly names that appear in every ASM dump of C++ code like "__ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_RS3_" I know C++, but deciphering what this call actually does is beyond me right now ;)
jamesinuk Author 26. Dec 2008	Ok looks like people are struggling so ill give you some hints about how this crackme works... This program downloads and reads a file char by char This program does something with each value This program uses windows keyboard events Ok, that should be enough info for now.

jammmie999's Jammmie999's CrackMe

Download CrackMe2.zip, 20 kb (password: crackmes.de)
Browse contents of CrackMe2.zip

A Challenging Crack Me with added Run times restrictions.

Enjoy.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 15. Jan, 2010
Downloads: 507

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Solutions

Solution by Everdoh, published 22. jan, 2010; download (158 kb), password: crackmes.de or browse.

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janisito's Crackeli Crackme

Download Janisitos_Crackeli_Crackme_II.zip, 10 kb (password: crackmes.de)
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Janisito's Crackeli Crackme II

The goal with this crackme is to find a valid serial. No keygen wanted! (Only bonus)
However... you cannot patch the .exe, that is, serial needs to be working on an unmodified .exe.

Get to work cracker!

// Janisito

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 04. Nov, 2006
Downloads: 433

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Solutions

Solution by lithium, published 16. jun, 2007; download (35 kb), password: crackmes.de or browse.

lithium has rated this crackme as quite nice.

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Discussion and comments

red477 05. Nov 2006	Interesting, lost my way drilling it...will try harder. Just one thing, is it really composed with assembler language?
janisito Author 05. Nov 2006	It is written in Visual Studio (C++), but almost all code is inline assembly. Keep going, you'll beat it!
DaBookshah 07. Nov 2006	Is it just me or is this thing removing my memory breakpoints? Bad Crackme! Bad!
janisito Author 07. Nov 2006	: ) Hahaha... the frustration of a cracker. Why is it a bad crackme? It does not tamper with your breakpoints, you only need to put them in the right place.
DaBookshah 07. Nov 2006	I know. I'm just up to the bit with the self modifying code. Because it only does modifications, and not a direct overwrite, memory breakpoint corrupts the code.
janisito Author 08. Nov 2006	Is anybody close to breaking this one? I don't think this crackme is that hard.
DaBookshah 09. Nov 2006	I pretty much hit a dead end. There's a call [eax] instruction which throws an exception, where eax is based on the entered serial. Either: 1. This is actually meant to go somewhere. 2. This is meant to throw an exception. But the exception handling code is a dead end.
DaBookshah 09. Nov 2006	Actually, is it possible this is a bug? I mean, if you enter certain characters(without running in the debugger), it just freezes. Is this intentional?
janisito Author 09. Nov 2006	You should examine the exception handler a little more.
DaBookshah 10. Nov 2006	Thanks That helps
janisito Author 16. Nov 2006	Did anyone crack this one yet? I'd really like to see a tutorial on this one.
janisito Author 18. Jun 2007	Nice solution by Lithium! Well done!

jB_'s KeygenMe 3

Download jB-keygenme3.zip, 98 kb (password: crackmes.de)
Browse contents of jB-keygenme3.zip

KeygenMe 3

No patching, no crappy self-keygen of course.
This keygenme has not been designed for beginners or
intermediate crackers, nevertheless everybody is
invited to try it.
Of course there is a solution...

Once you have a valid keygen, send it to me with a small
tutorial: resrever@gmail.com . Same mail if you find a
bug or if you want to send comments.

Good luck, and happy reversing!
Source code will be published when a solution is found.

http://jardinezchezjb.free.fr

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 19. May, 2006
Downloads: 824

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by divinomas, published 30. may, 2006; download (42 kb), password: crackmes.de or browse.

divinomas has rated this crackme as quite nice.

Discussion and comments

divinomas 25. May 2006	Anthoer nice crackme by jB!Thank you :)

jE!'s Gr. crackme >>KongFuZi<<

Download Break_KongFuZi.zip, 6 kb (password: crackmes.de)
Browse contents of Break_KongFuZi.zip

woah!
this 2 day i force myself to burn-out this crackme.
Idea came quite time ago, but i refused to show it, bcoz of bUstard-brute-force.
thusly, yesterday i build VM-like code, which IMHO prevents brute-force.

yah.. & no cooperation there!
it is personal challenge.
if quite time will unresolved, then start discussion. OK?

MODERATOR NOTE: yes it's vague, but solutions must work on machines with DEP enabled - in other words there can be no execution in the memory that was loaded from the key file

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: Assembler

Published: 08. Jun, 2010
Downloads: 527

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Solutions

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Discussion and comments

BoRoV 08. Jun 2010	which should appear as a result of success?
jE! Author 08. Jun 2010	do you want source?! :D
BoRoV 08. Jun 2010	no :D I think decided. I get the message ">>YOU<< are >>PRIDE<< of RCE SCENE!!!" :P
jE! Author 08. Jun 2010	unusually GREAET: :p
jE! Author 08. Jun 2010	for prevent easy solutions, KEYfile IS NOT executable. cracme RESPECTS "DEP", so mast solve.
redoC 08. Jun 2010	KongFuZi said: Successfully registered! ... it's not level 8.
jE! Author 08. Jun 2010	eh?? are u sure, KongFuZi knew about Registration??
andrewl.us Moderator 09. Jun 2010	redoC's key file is able to jmp into first region where key file is stored and execute code without exception - this is apparently what jE! was trying to prevent with VirtualProtect(): 0:000> !vprot 841008 ... AllocationProtect: 00000001 PAGE_NOACCESS RegionSize: 00001000 State: 00001000 MEM_COMMIT Protect: 00000002 PAGE_READONLY ... why no exception? see VirtualProtect() on msdn: "PAGE_READONLY 0x02 Enables read-only access to the committed region of pages. An attempt to write to the committed region results in an access violation. *If Data Execution Prevention is enabled*, an attempt to execute code in the committed region results in an access violation." without having ever touched DEP settings on this machine, GetSystemDEPPolicy() returns OptIn - redoC's machine probably returns {OptIn, AlwaysOff} 0 crackme maybe can sense (via GetSystemDEPPolicy()) and adapt (SetProcessDEPPolicy()) to environment if its "Platform" setting is to remain general Windows - crackme needed more testing on varied machines
jE! Author 09. Jun 2010	yah, BoRoV was first to make executable solution... but guys, how you all can so fail to simply view file??
redoC 09. Jun 2010	Now it looks quite more difficult. I probably wait for BoRoV's solution.
BoRoV 09. Jun 2010	my solution dont like the author, he wants something else.
redoC 10. Jun 2010	... and what is exactly allowed? patching, dll injecting, some sort of bruteforcing, ...?
jE! Author 10. Jun 2010	>>what is exactly allowed? you should discover it yourself inside... but, shortly, KEYfile not intended for execution code
simonzack Moderator 10. Jun 2010	@jE: I'm not sure if this is what you wanted, I made a keyfile with around 90% of the bytes empty Is this what you exptected?
jE! Author 10. Jun 2010	probably no. send in PM
redoC 11. Jun 2010	Just to be sure, the main goal is changing the text of MsgBox? Give us some clues... otherwise it could not crack nobody for years.
jE! Author 11. Jun 2010	inside written all, what it want.
Coderess 11. Jun 2010	Mda, do something who knows what
redoC 23. Jun 2010	... and now nobody crack this for ages
jE! Author 24. Jun 2010	why, simonzack made interesting but alternate solution. dunno, why he not published.
CronuX 09. Jul 2010	I found this message but without knowing what it means, can be useful and waiting for some solution of this wonderful crackme, greetings "KongFuZi said: "The hardest thing of all is to find a black cat in a dark room, especially if there is not."..; Lets break this!..; THINK, how to burn non existent string for MsgBox:..; "You have found a Black Cat in a Dark Room, although the cat was not even there!"..; Don't fight with crackme, main challenge is for your fUntasy :)..; after that, you will solve VM-like puzzle with KEY-file. (which is designed against BruteForce)..; PS. this code respects DEP...[keysz 450]" sorry for my bad english
redoC 21. Sep 2010	nice work, alex_ls
alex_ls 22. Sep 2010	By the way this solution is not real just some kind of alternative! "The black cat cannot be delivered into a black chumber manually, because there's no any cat at all :)" Looking forward to see the real one!
redoC 26. Sep 2010	why solution from alex dissapeared? it was fine solution
alex_ls 27. Sep 2010	Sorry, redoC, I asked andrewl.us to remove it. Perhaps somebody will be able to create a key file with pure VM.
jE! Author 28. Sep 2010	removing was very bad move. didn't i suggested to publish it??
Bargest 30. Oct 2013	Now I think can show any short string (up to 20 characters) using pure VM. Is the goal to write "You have found a Black Cat in a Dark Room, although the cat was not even there!" or any other string?
Bargest 31. Oct 2013	I've modified the code. Now I can generate strings up to 50 characters long. But "You have found a Black Cat in a Dark Room, although the cat was not even there!" is still TOO long.:)

jE!'s jE!'s_PUZZLE06.zip

Download jE!__s_PUZZLE06.zip, 822 b (password: crackmes.de)
Browse contents of jE!__s_PUZZLE06.zip

TRY change only 1(one) byte!!!!!!!!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 24. Nov, 2007
Downloads: 514

Rating

Votes: 4
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Solutions

Solution by kaspar, published 10. dec, 2007; download (1 kb), password: crackmes.de or browse.

kaspar has rated this crackme as awesome.

Discussion and comments

jE! Author 24. Nov 2007	Forgot to mention: this is mind-challange about opcode transformation, NEVER mind BrutusForzing! suggested tool: HIEW.. other 1byte puzzles with solves are aviable on msg-boards.
cyclops Moderator 24. Nov 2007	NIce exit code jE!
halsten 25. Nov 2007	Simply interesting, nice to find something innovative after all. :)
w00b 25. Nov 2007	would changing 2 number values in eax count as only changing 1 byte?
jE! Author 26. Nov 2007	change (PATCH) only 1 byte in CODE of progii.
Zaphod 26. Nov 2007	A 2-byte patch is easy, but a 1-byte patch? - I'm still scratching my head !!
asiiik 26. Nov 2007	OMG.. it's only 2kb and it's ripping my head off.. still looking for the right byte to patch.. aaaaargh!! has anyone sent a solution for this yet? i must send one before anyone does.
IMPosTOR 26. Nov 2007	find how can change eax value :D
Abdul 27. Nov 2007	Dang! Did someone nail it?
DigitalAcid 28. Nov 2007	Damn, I also found a 2-byte patch, but got no idea for 1 byte atm and i tried some stuff already.
jE! Author 28. Nov 2007	u must understand method: METHAMORPHOSE of opcode!
DeepBlue 28. Nov 2007	I guess there is a reason you chose THAT Imagebase, right? :P
jE! Author 29. Nov 2007	;; heeeey! maybeeeeeee
DeepBlue 29. Nov 2007	Can you give a hint, what the byte is? Opcode, MODR/M, SIB, rel32, disp32....? Or maybe wait a little bit longer and give that as a hint.
jE! Author 29. Nov 2007	pfirst byte of instruction.
DigitalAcid 01. Dec 2007	Anyone found something yet ? I guess this is for the more advanced people. I mean, some opcodes can be replaced by simpler/shorter ones and i think that's what we will have to find out. I found lots of ways to change the string, but not through a 1 byte patch :(.
Zaphod 02. Dec 2007	DigitalAcid, I can't find it either - I'm still working on it, but I'll probably just have to wait for someone to strike gold...
jE! Author 02. Dec 2007	guys, i suggested in 1st post, look at my other 1byte puzzles, for better understanding; wait, i will post them now on cracmes-msgBoard
jE! Author 02. Dec 2007	posted: http://www.reverse-engineering.net/viewtopic.php?p=41228
DigitalAcid 03. Dec 2007	Thx for those puzzles.

jE!'s jE!'s PUZZLE 07

Download jE!__s_PUZZLE07.zip, 6 kb (password: crackmes.de)
Browse contents of jE!__s_PUZZLE07.zip

change only 1(one) byte in "puzzle07.exe" code for showing "Registered!" MessageBox;
puzzle written in RosAsm (v2.050a) assembler, it conteins source, can be viewed in RosAsm.

DON'T brute, it is for Brain training. use HIEW for experimenting with opcodes..

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 02. Dec, 2007
Downloads: 561

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Solutions

Solution by kaspar, published 10. dec, 2007; download (474 b), password: crackmes.de or browse.

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Discussion and comments

jE!'s jE!_CRC_DRx

Download jE!_CRC_DRx.zip, 4 kb (password: crackmes.de)
Browse contents of jE!_CRC_DRx.zip

U must buid KEY-file, which forces cr0ckme to show msgbox:

WOW!
CONGRATULATIONZ!

story, source is inside crackme, bcoz ROSASM is compiler!

Difficulty: 7 - Very hard
Platform: Windows
Language: Assembler

Published: 02. Sep, 2008
Downloads: 732

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by andrewl.us, published 02. dec, 2008; download (28 kb), password: crackmes.de or browse.

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Discussion and comments

andrewl.us Moderator 13. Nov 2008	Any hints on this one? I can't get this to pass: 004030C5 add ecx, esi <--- always 0x171B6, ZF=1 004030C7 mov esp, fs:[edx] 004030CA pop dword ptr fs:[edx] 004030CD jz short loc_4030DB <--- never taken (calls ExitProcess) Are the DRx registers used only for computation, or are we actually supposed to get a value in there so that an exception happens upon memory read? (you set DR7 to 0x155 at 4013171, is it to mislead?) Is ANY of this crap ever supposed to be executed: 00403000 jmp short near ptr 402FEDh 00403002 Exit1: 00403002 add esp, 0Ch 00403005 jmp eax 00403007 jmp near ptr 0EA2A19F5h 0040300C 0040300C Exit2: 0040300C mov [esp+14h], eax 00403010 add esp, 0Ch 00403013 retn Thinking the first write of DRx to memory can be used to control main thread's exception record. But this would leave 4 dwords from KEY file unprocessed... is this the right thinking?
JoKa 13. Nov 2008	andrewl.us: I suppose ecx+esi depends on KEY file. Try, for example, decrease byte at offset 00000013h by 1. I think ecx+esi would change.
andrewl.us Moderator 13. Nov 2008	Exception handler @00403281: ECX = sum of bytes (exit code from thread == 0x171B6) ECX = ECX - context.ESI context.ECX = ECX On the main thread side @4030C5: ECX = ECX + ESI (result 0x171B6) In other words, it does 0x171B6 - ESI + ESI ...which is always 0x171B6 and doesn't depend on any bytes from KEY.
JoKa 14. Nov 2008	Sorry. I was wrong. Sum depends on breakpoints set. Does not depends on KEY file. When no breakpoint are set, sum is equal to 0x17187 (I checked value two times in different ways). I suppose it is possible substitute return address in exception handler using first pass: 0040323A lea edi,dword [ebx+4] 0040323D mov ecx,3 00403242 rep movs dword [edi],dword [esi] second pass: 00403261 lea esi,dword [ebx+4] 00403264 mov ecx,3 00403269 rep movs dword [edi],dword [esi]
JoKa 14. Nov 2008	andrewl.us: Copy bytes from original file starting from offset [1000h] till EOF to text file. There are story and source code of crackme.
JoKa 14. Nov 2008	Exit2 is used after LoadLibrary to pass argument for GetProcAddress Exit1 is used after GetProcAddress to call MessageBox I can now pass to 4030db But I don't know how can I push 'user32' and 'MessageBoxA' in stack.
andrewl.us Moderator 14. Nov 2008	Yes, I think that is inserted by RosASM IDE, but jE!'s English alone can be considered a level 9 crypto crackme. Naming the dwords read from file into stack memory dword0...dword9 then the two writes we get are: &dword5 + dword4 = mix(sum, dword0..dword3) &dword9 + dword8 = mix(sum, dword5..dword7) Notice SEH handler link is at &dword0 - 8. U need fUntaziE+LogiQ, have U!? fun is fun, but what for U!? :) :)
andrewl.us Moderator 15. Nov 2008	to get MessageBoxA without "MessageBoxA" string: HANDLE h = LoadLibrary("user32"); PVOID p = GetProcAddress((HMODULE)h, (LPCSTR)477);
andrewl.us Moderator 15. Nov 2008	Can you get to 4030DB while still allowing second pass to execute? If I overwrite exception record on stack on second pass, there is not remaining another exception to invoke my new handler.
JoKa 17. Nov 2008	andrewl.us: I overwrite 3 dwords in Context structure (regEip=004030CA, regCs=0000001B, regFlag=00000246) on second pass to get to 4030CA. I did'nt found that first write uses calculation based on (dword0..dword3). It can be used to push 'user32'.
jE! Author 24. Nov 2008	guys! don't make things harder! you must NOT affect program execution in NO way. only KEYfile can do this! read inside SRC, first meditate about howto call MSGbox. imagine you jumped @4030DB OK!?!? so how then there call MSGbox?
JoKa 25. Nov 2008	first 9 dwords of KEYfile are used to write 2 x (3 dwords). We can use it to write 'user32' and 'MessageBoxA' to necessary places in stack. Last dword of KEYfile is used to set up calling MessageBoxA (it must be 340c2800 in file order or 00280c34 in reverse order). It is clear. Can we jump to 4030DB (or 4030CA) using KEYfile? Yes, we can use second of two writes for overwriting regEip context structure. But in this case we can't write both 'user32' and 'MessageBoxA' to stack. Is there another way to jump to 4030DB without patching exe-file and using one of two writes? I still think that we can't do this.
jE! Author 25. Nov 2008	how you can overwrite regEip? interesting, but i not coded such thing. show you variant of keyfile. go here for better upld http://www.woodmann.com/forum/showthread.php?t=12038
JoKa 25. Nov 2008	64 16 6d 00 01 00 00 00 1c 55 6e 72 01 00 00 00 28 00 00 00 f3 b9 78 00 a1 14 35 00 93 b4 59 00 c0 fd ff ff 34 0c 28 00 To run inside OllyDbg remove all breakpoints, then breakpoint GetCurrentThread, then run, after breakpoint plays, set breakpoint at 4030CA, after breakpoint plays you can step over to see how program works.
jE! Author 25. Nov 2008	ok, there is not MsgBox API..
andrewl.us Moderator 25. Nov 2008	Do you mean that there is not string "MessageBoxA" on the stack? Out of: 1) pass "jz 4030DB" 2) put "user32" 3) put "messageboxa" JoKa's key file demonstrates that we can only choose two out of the three.
andrewl.us Moderator 25. Nov 2008	(and his chose 1 and 2)
jE! Author 26. Nov 2008	BUT I SAID: (LAST REPEAT) >imagine you jumped @4030DB OK!?!? >& meditate about howto call MSGbox. fully discover it; then meditate on JZ ..that is magic of crackme 1)+2)+3)
JoKa 03. Dec 2008	andrewl.us: Good solution. Thanks for reference, but I don't think that I can add something new.
main 31. Mar 2010	Holy shit... This is some serious stuff. Really nice solution guys!

jE!'s jE!_crme02

Download jE!_crme02.ZIP, 4 kb (password: crackmes.de)
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crackme tape - assember;
level - trikie(you need to guess FEW things), not easy;

You must tape correct KEY in edit-box, then close window
& on exit it will show Registered message-box; (else not-registered);

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 16. Jan, 2005
Downloads: 1016

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Solutions

Solution by bilbo, published 04. feb, 2005; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

jhon's Matematica 1

Download matematica.zip, 834 kb (password: crackmes.de)
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Objetivos:
1. Encontrar la ecuación matemática que comprueba el serial.
2. Resolver la ecuación.
3. Resolver la cascara al ingresar el serial.
4. Listo!

Objectives:
1. Find the mathematical equation that checks the serial.
2. Solve the equation.
3. Skipping key entry system. (Resolve The System)
4. Ready!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 03. May, 2013
Downloads: 191

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by jmper, published 13. may, 2013; download (1 kb), password: crackmes.de or browse.

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Solution by iSSoGoo, published 13. may, 2013; download (59 kb), password: crackmes.de or browse.

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Discussion and comments

jhon Author 02. Jun 2013	nice jmper & iSSoGoo ! :D
CrackMyAss 04. Jun 2013	jhon,can you explain your requirement?? I dont understand this: Objectives: 1. Find the mathematical equation that checks the serial. 2. Solve the equation. 3. Skipping key entry system. (Resolve The System) 4. Ready! because I am not native english speaker

jhon's Pass Corta

Download Pass_Corta.zip, 4 kb (password: crackmes.de)
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Español:
Este es mi segundo crackme, en este no dare mucha informacion, solo les dire que las pass es estatica
Ingles:
This is my second crackme, in this dare not much information, just let me say that the pass is static

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 16. Jul, 2008
Downloads: 915

Rating

Votes: 10
Crackme is quite bad.

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Solutions

Solution by AloneInTheDark, published 19. jul, 2008; download (542 kb), password: crackmes.de or browse.

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Solution by apuromafo, published 22. jul, 2008; download (1655 kb), password: crackmes.de or browse.

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Solution by xylitol, published 19. jul, 2008; download (5 kb), password: crackmes.de or browse.

xylitol has rated this crackme as boring crap.

Solution by costy, published 19. jul, 2008; download (557 b), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 16. Jul 2008	This is like level 1, it's so easy (I would say 0, but that doesn't exist). Solved in a second ;).
costy 16. Jul 2008	Difficulty is -100 for me
xylitol 16. Jul 2008	too easy i agree
jhon Author 16. Jul 2008	Well, I was testing as a programmer, and not what is more difficult and easier which, as I am learning cracking, only create crackmes, not as Defifered and therefore not be required to Defifered ... Greetings ...
Xspider 16. Jul 2008	yep everyone start learning with VB :p
MulleDK13 17. Jul 2008	At least level 2. It all depends on how good you are. No first-time newbies would be able to solve this.
TiGa 17. Jul 2008	Just a thought for the more experienced members: You don't have to solve every level 1 crackme that comes in... Is there some challenge or pride in writing a solution for a crackme that you consider really too easy for you? Solutions still need to be as detailed as possible. There's a lot more to say than only "Put a BP here, F9, check register, solved".
~misunderstood~ 19. Jul 2008	yes, this was very easy, but I think one shouldn´t judge too hard, for it´s just a crackme for newbies. I´m sure that there are a lot of people out there who don´t have a clue (yet) on how to solve this...
DigitalAcid 19. Jul 2008	@TiGa: It was level 3 so I thought I would give it a try. Since it changed level and is so easy I'm not going to write a solution, somebody else should do it. Somebody who might learn something or teach others. I'm waiting for something challenging =).
TiGa 19. Jul 2008	The point of view of the writer makes a lot of difference. Experienced reversers can sum up the solution in 2-3 lines but newbies are still amazed by every successful minuscule step that they take and usually can describe easier crackmes in more details.
apuromafo 22. Jul 2008	@TiGa thx for approvate the update ;) maybe is big size , but contain info thats others not say :) (the anexo)
~misunderstood~ 24. Jul 2008	a thing I don´t quiet get : why do people write a solution for a crackme they rated as "boring crap" ?
Xspider 24. Jul 2008	i think they(my self included :p) rate all VB crackmes like that!
costy 28. Jul 2008	@Xspider This is not true. Some VB crackme are difficult. This is my opinion.
obnoxious 28. Jul 2008	Agreed costy VB crackmes could be a big pain at times :)
Kennylive 14. Oct 2008	REally very easy 1 seg to down 1 seg to crack.. Demasiado facil.. has otra mas dificil..
zangoole 20. Nov 2008	Thank you for this easy crack me. Guys , It's easy for you. I'm a total noob in cracking and I love crack mes like this...

jhon's RND

Download RND.zip, 6 kb (password: crackmes.de)
Browse contents of RND.zip

Este es mi primer crackme, si corresponde a otor nivel cambienlo pfaaa!!!(aunque le puse nivel 3 en el programa como informacion)
el exe al cargar tiene una contraceña establecida estremadamente larga y dividida en barias partes, tiene un timer que cada 10 segundos cambia la contraceña basandose en esto:

Num = Rnd + 4 * 6 / 8 - 100000
Text2 = Num

Gracaias por su atencion!!!

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 13. Jul, 2008
Downloads: 421

Rating

Votes: 6
Crackme is quite bad.

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Solutions

Solution by apuromafo, published 17. jul, 2008; download (552 kb), password: crackmes.de or browse.

apuromafo has rated this crackme as nothing special.

Solution by xylitol, published 17. jul, 2008; download (192 kb), password: crackmes.de or browse.

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Solution by costy, published 17. jul, 2008; download (11 kb), password: crackmes.de or browse.

costy has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

xylitol 14. Jul 2008	hardcoded serial
costy 14. Jul 2008	Not hardcoded... random serial ;-\|
xylitol 14. Jul 2008	@costy: just type letters mate, and look the serial
xylitol 14. Jul 2008	routine calculate letters too
costy 14. Jul 2008	The serial is this: Num = Rnd + 4 * 6 / 8 - 100000 The author explained it in the info. RandomNumber+ 4 * 6 / 8 - 100000
xylitol 14. Jul 2008	i know dude i know
Xspider 14. Jul 2008	why the infos not english :S
jhon Author 15. Jul 2008	no hablo ingles
Xspider 15. Jul 2008	so translate it :lol: there are a lot of translators!! that's what i get from BabelFish :p This he is my first crackme, if pfaaa corresponds at otor level cambienlo! (although I put level to him 3 in the program like information) exe when loading has one contraceña established estremadamente releases and divided in baryes parts, it must timer that every 10 seconds it changes contraceña being based on this: Num = Rnd + 4 * 6 / 8 - 100000 Text2 = Num Thanks for its attention!
Xspider 15. Jul 2008	whoops there are some words didn't translated :p
apuromafo 15. Jul 2008	translated by xperience This he is my first crackme,if correspond to other level change please!!!(although I put level to him 3 in the program like(as) information ) the executable to charge have an password established very long and divided in many portions (parts), have an timer tha'ts 10 seconds change the password being based on this: Num = Rnd + 4 * 6 / 8 - 100000 Text2 = Num Thanks for its attention! //traduced by apuromafo
apuromafo 15. Jul 2008	maybe can not traduce for some words writeds.. is for the grammar in spanish i can say the original or as must be understable,,english is dificult, but spanish is my native idiom /original word in bad write=original word thats must be=traduction in word english?.. otor=otro=other pfaaa!!!=porfavor=please contraceña =contraseña=password estremadamente=extemadamente=similar to word many or dificult barias =varias= many as "a lot"
apuromafo 15. Jul 2008	mm cheking is solved..i now to write the tut :) see ya
jhon Author 15. Jul 2008	This is my first crackme, if applicable to granting level canvienlo please (though I put him level 3 on the agenda as information) exe to the load have an established pass extremely long and divided into barias parties, has a timer that changes every 10 seconds pass based on this: Num = Rnd + 4 * 6 / 8 - 100000 Text2 = Num Thank you for your attention! ///Traductor Google///
apuromafo 15. Jul 2008	canvienlo=cambienlo=change
costy 15. Jul 2008	I don't understand why the author said Num = Rnd + 4 * 6 / 8 - 100000 Text2 = Num It's easy with this helps.
jhon Author 16. Jul 2008	perdon, borre tu comentario por accidente: thats is for señalate for the other value serial is in other way , is pointed to a random value example serial... now 10 sec serial changed by random value .. i defeat the random for not disturb, but in the same place is the cmp my tut is in doble language :) english and spanish and too contain an anexus
jhon Author 16. Jul 2008	gives me a lot of laughter, that gave them the source code in which basa security system and still can not see it ... It was to be solved this crackme ... jajajaajajajajajaajajaja !!!!!
jhon Author 16. Jul 2008	Great, are already 3 !!!!!!!!! Greetings ...
costy 17. Jul 2008	@jhon.. "i defeat the random for not disturb, but in the same place is the cmp" Do you mean you changed the crackme? Did you send a new version?
costy 17. Jul 2008	@apuromafo Thank you for explaining the GODUP plugin. Really usefull
jhon Author 17. Jul 2008	I say that 3 that are already resolved the crackme
obnoxious 18. Jul 2008	@apuromafo gr8 tut. costy your tut was also pretty cool!!!!!!
costy 18. Jul 2008	yeah. but the tut of apuromafo is simply the best.
apuromafo 18. Jul 2008	@all tuts are good :)
Xspider 18. Jul 2008	yep and they are all differents :D

Jim~'s BFCrackme

Download bfcrackme.zip, 1 kb (password: crackmes.de)
Browse contents of bfcrackme.zip

I was bored so I coded a little crackme in BrainFuck.

.COM file compiled with BFD.

Source code included, so it can be run on any platform (or even an online javascript brainfuck interpreter :P)

- No Patching or editing the source code
- No Bruteforcing

Have fun! :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Multiplatform
Language: Unspecified/other

Published: 17. Dec, 2006
Downloads: 527

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Solutions

Solution by mucki, published 21. dec, 2006; download (19 kb), password: crackmes.de or browse.

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Discussion and comments

Jim~'s Crackmeh

Download Crackmeh.zip, 202 kb (password: crackmes.de)
Browse contents of Crackmeh.zip

Crackmeh by JiM~

- No patching
- Find valid serial combo
- Make keygen

Have fun! :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 18. Mar, 2007
Downloads: 574

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

toshimi 29. Mar 2007	ummm... for example: The UserName has 2 o more serials? (combo)???
toshimi 29. Mar 2007	could you pls explain this? Jim..!.
Jim~ Author 29. Mar 2007	Each username should only have one valid serial. I didn't test for collisions, but I'm pretty sure multiple names could result in the same serial after a certain length of name.
Drakenza 04. Jun 2007	Hmm.... I fished 2 serials and found the comparison calls, etc, but still haven't reversed algo....

Jim~'s JiM~ DotNet Series #1

Download jim_dotnet_series_1.zip, 10 kb (password: crackmes.de)
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It's been a while. Here's a new keygenme from me ;)

I'm going to see if I can come up with a few more and make a series out of this.

Hope you like it.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 03. Feb, 2010
Downloads: 381

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by obnoxious, published 04. feb, 2010; download (12 kb), password: crackmes.de or browse.

obnoxious has rated this crackme as quite nice.

Discussion and comments

obnoxious 03. Feb 2010	:) nice to see your crackme :)
Xspider 04. Feb 2010	w0w faster than the 4 other solutions in queue :p
Jim~ Author 04. Feb 2010	Nicely done, obnoxious ;)
obnoxious 05. Feb 2010	@Jim~ Thank you. @Xspider I got connections :P BTW i forgot to mention none of Jim~'s code was hurt in the making of the keygen. :P

Jim~'s lolcrackme1

Download lolcrackme1.zip, 5 kb (password: crackmes.de)
Browse contents of lolcrackme1.zip

- Find the valid combination
- No patching

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 25. Nov, 2006
Downloads: 1242

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Solutions

Solution by pwn, published 31. jan, 2007; download (1 kb), password: crackmes.de or browse.

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Solution by Ank83, published 01. dec, 2006; download (65 kb), password: crackmes.de or browse.

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Discussion and comments

Jim~ Author 25. Nov 2006	You got me. Nice job, astigmata. :)
jB_ 25. Nov 2006	Avoid giving the solution in the comments, as people will read them while downloading the crackme. Even if it is very simple. Private messages are useful :)
astigmata 26. Nov 2006	send your solution jB lol
jB_ 26. Nov 2006	Ah somebody removed the previous posts, so my message has no sense now =) No, I won't send my solution as I didn't look at the crackme, and I don't have a PC where I am. Regarding the previous comments, lot of people can solve it with an approach probably better than mine for beginners.
zairon Moderator 26. Nov 2006	[OT mode on] jB_, I didn't remove your post because lately there are many comments like the one I deleted. I hope people read your message, especially the first part: "Avoid giving the solution in the comments". Sorry for this ot, go on with the discussion :) [OT mode off]
Devoney 06. Feb 2007	Nice CrackMe. By examing the values at address 40XXXX which got pushed in that important function to check if the input is correct I have found the correct password. A little bit confusing is that the al input is equal to the values at address 40XXXX. I did not need www.asciitable.com with this one ;)
vidyasagar 07. Dec, 05:01	Thank you, start my RE, its good, i feel motivated ;)

Jim~'s MMFCrackme

Download MMFCrackme.zip, 555 kb (password: crackmes.de)
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MMFCrackme by JiM~

Heres a crackme I created with Multimedia Fusion 2,
a powerful event-based rapid game development
application from a french company, Clickteam.

Any solution is acceptable. Feel free to patch, keygen, or
do whatever you please to make my crackme validate.

Good luck and have fun! :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 17. May, 2008
Downloads: 621

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Solutions

Solution by PeterPunk, published 22. jun, 2008; download (150 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 17. May 2008	Funny but easy (just if you've worked before with apps which uses runtimes as VB, RealBasic, etc..) :P
DigitalAcid 17. May 2008	Easy for you :P.
Till.ch 18. May 2008	Yea it's pretty funny, something special :> Interesting format, as HMX0101 already said the algo is quite easy. I had fun with this ;)
Jim~ Author 18. May 2008	Yeah. The algo was simple. Focus for this one was on the runtime. ;) Nice work on the keygen, HMX0101
ltkerr0r 18. May 2008	Can you post a tut on the runtime pls?
neo_40 18. May 2008	The music is awesome where did you get it?????????
Jim~ Author 18. May 2008	Thanks for the keygen, Till.ch ;P I am defeated. :) neo_40: the tune is summertime, by nula: http://chiptune.untergrund.net/chiple/?q=summertime
costy 18. May 2008	Really simple. File are in the TEMP directory :-)
cobrasniper555 20. May 2008	Is there a solution on the way? This is an interesting crackme Jim~!
ltkerr0r 21. May 2008	I'm hoping for a solution too. I use MMF and I'm interested in figuring out the runtime and seeing how I can alter gameplay. I think MMF dev (or just some option) doesnt put the temp exe in the temp directory, only the extensions.
DigitalAcid 21. May 2008	5 mfx files, 1 sft file, 1 dll and 1 exe file in temp dir =). I can't wait to see a solution for this one either.
Jim~ Author 21. May 2008	The mfx files are dll's.
costy 22. May 2008	The good serial is displayed clearly
Laurance_1111 23. May 2008	TEMP directory? I can't find it. I am a newbie
Laurance_1111 23. May 2008	Who can give me any hint? Thx
Jim~ Author 23. May 2008	In windows xp, try looking in \Documents and Settings\(username)\Local Settings\Temp\
HMX0101 23. May 2008	Just put a bp in GetWindowTextA and press CTRL-F9 till you return to Runtime dll and try to follow what's going on :)
Laurance_1111 26. May 2008	I find the Temp directory. And it is very funny, but difficulty for me. I need more work to catch up HMX0101, I tried the way you posted, but after several steps, the "memory can't be read" error will happen. Maybe, I don't when the process is at the Runtime dll. btw, English isn't my native language. So I am sorry if there're any misunderstanding. Thanks anyway
obnoxious 27. May 2008	no solutions for this 1 yet??????????????
costy 13. Jun 2008	@ltkerr0r I sended a solution... you could have a look when it will be published but the best way to alter gameplay is GameWizard. A little tool for universal game cheating.
costy 13. Jun 2008	@HMX0101 The breakpoint on GetWindowTextA doesn't work.
costy 16. Jun 2008	To Jim~ i founded a serial for my name. Is it a solution for your crackme or I have to write a keygen??
TiGa 16. Jun 2008	Fishing a serial is really not enough.
DigitalAcid 16. Jun 2008	"MMFCrackme by JiM~ Heres a crackme I created with Multimedia Fusion 2, a powerful event-based rapid game development application from a french company, Clickteam. Any solution is acceptable. Feel free to patch, keygen, or do whatever you please to make my crackme validate. Good luck and have fun! :)"
costy 16. Jun 2008	My solution was rejected. becouse i didn't write a keygen. If the author don't want a keygen but a keygen is necessary, a moderator should write a note in which he asks a keygen... I losed a lot of time writing my solution... This isn't correct. Next time could be better to explain what is required. It's a form of respect for someone who freely write a solution for this site.
Ox87k 16. Jun 2008	Well costy, that's strange because JiM~ wrote: " (...) Any solution is acceptable. Feel free to patch, keygen, or do whatever you please to make my crackme validate." @MODS: Why you reject a solution if the author wrote this? Keygen is not required in this case.
TiGa 16. Jun 2008	We don't like solutions that sound like "cake recipes": "Do this, bp here, do that" without explaining anything. The why is really as important as the how. The main idea behind crackmes.de is to learn new things about reverse-engineering. Only fishing or patching without explaining the algo doesn't teach much.
TiGa 16. Jun 2008	I'll accept a fishing solution for this crackme if the algo is explained. Serials don't fall fully-formed from the sky. But logically, if you know the algo, you're one step away from making a keygen. If the serial can be fished, it's only a matter of replicating the algo into a keygen.
Jim~ Author 17. Jun 2008	The algo isn't too complicated either. Especially if you take a look at some of the names of the .mfx files that are unpacked. ;)
TiGa 17. Jun 2008	costy: During all the time that you spent complaining, you could have improved your solution. Posting a link to a rejected solution is never a good idea. Either explain the algo or forget about this crackme. If you don't know what goes on in a crackme and find a serial only by dumb luck, don't write a solution about that. That's common sense!
costy 18. Jun 2008	ok TiGa. ;-) bye
PeterPunk 19. Jun 2008	I coded a keygen for this one. Now I'm working with the tutorial but I'm in troubles with the language (I only speak galician and spanish). Probably I'll send it tomorrow.

Jim~'s SpaghettiMe

Download spaghettime.zip, 61 kb (password: crackmes.de)
Browse contents of spaghettime.zip

After growing tired of the onslaught of simple
.NET targets on crackmes.de, I decided to give
a shot at making a keygenme that takes a little
more thinking by involving some recursion. You
won't be able to copypaste code to generate a
serial in this one ;)

Have fun! I look forward to your solutions :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 28. May, 2008
Downloads: 442

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Solutions

Solution by obnoxious, published 21. aug, 2008; download (8 kb), password: crackmes.de or browse.

obnoxious has rated this crackme as quite nice.

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Discussion and comments

InterGhost 01. Jun 2008	It's the most interesting CrackMe I've ever seen =)) Thanks!!
Jim~ Author 02. Jun 2008	Glad to hear you enjoy it. Any luck keygenning it? It's not too hard ;]
born2c0de 02. Jun 2008	It looks like a one-way hash function although I could be wrong. Are you sure this can be done without bruteforcing?
Jim~ Author 02. Jun 2008	Yep. I've already made a keygen myself. :)
born2c0de 02. Jun 2008	Cool. In that case, I'll keep trying.
Jim~ Author 05. Jun 2008	A few valid keys to help you along, maybe? User: JiM~ Key: QMbb8AYbMEVab4SZrsPY7QMYLUJXbIGWq8DV6 Key: FhtvwxhswBVpvRJmug9jtwxgtAldsQZargNXqwBU Key: h41iNwzgtYpfNAndsodcMQbar4RZLgPXrIFWKwDU :)
costy 05. Jun 2008	first key doesn't work on my pc!
Jim~ Author 05. Jun 2008	haha! you're right. I didn't copy the whole key. whoops! >.<
simonzack Moderator 06. Jun 2008	I don't get it at all. My keygen sometimes works, sometimes doesn't, but Overloaded() and getHash from name is definitely equal I got another key for JiM~: wv7+/v7+/v7+/v7+/v7+/v7+/v7+/v7+/v7+/v7+
simonzack Moderator 06. Jun 2008	Sorry, dont know how to edit the gethash I get for "JiM~" is 207 ((name->GetHashCode()/0x186a0)%0xff) but i think it should be 163
Jim~ Author 06. Jun 2008	My guess as to why your keygen won't always work has to do with not compensating fully for the modulo inside overloaded(int[]) Just a guess. PM me your algo for generating and I'll take a look at it. Or maybe some of your 'should-work, but don't work' keys?
AloneInTheDark 07. Jul 2008	Hi, I have send my solution. I have update Overloaded() function, my Overloaded() return "true" value. The password is any string of 40 characters.
Jim~ Author 09. Jul 2008	AloneInTheDark: Based on your comments, it sounds like you patched or rewrote the Boolean Overloaded() method. If so, that won't be accepted as a valid solution here. The only valid solution should be a key generator.
obnoxious 21. Aug 2008	Well Jim~ did you like it? :)
Jim~ Author 24. Aug 2008	Nice work, obnoxious. I enjoyed reading your solution. You broke down my recursion haha :)
raygeee 10. Jan 2009	Actually, to create a KeyGen it isn't really necessary to reverse the overloaded(string) and overloaded(int). overloaded(int[]) and overloaded() is enough. Just use the original methods to get the encrypted value of the name. One other thing I got into trouble was that I got a StackOverflowException when running in Debug mode. In Release mode the recursive calls run perfectly because of the optimization. However, I found that a really nice one!

JJHACKER's GestureMe 1.0

Download GesMe1.zip, 1639 kb (password: crackmes.de)
Browse contents of GesMe1.zip

Find a way to get in :D

Acceptable answers:
1- Create a program that automatically design gesture
2- Make a tut to show how program read and check the gesture

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 07. Jan, 2014
Downloads: 336

Rating

Votes: 3
Crackme is quite bad.

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Solutions

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Discussion and comments

givses 19. Jan 2014	Load in a resource ditor and the solution will be in front of your eyes. :)
redoC 05. May 2015	already solved here: https://forum.tuts4you.com/topic/34205-gestureme-10/

j!m's j!m key1

Download jm_key.zip, 25 kb (password: crackmes.de)
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name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Mar, 2002
Downloads: 1851

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Solutions

Solution by luucorp, published 18. dec, 2002; download (29 kb), password: crackmes.de or browse.

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Solution by scarl, published 30. mar, 2002; download (2 kb), password: crackmes.de or browse.

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Solution by figugegl, published 30. mar, 2002; download (33 kb), password: crackmes.de or browse.

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Solution by yar0n7, published 30. mar, 2002; download (3 kb), password: crackmes.de or browse.

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j!m's j!m key2

Download jm_kgm_2.zip, 26 kb (password: crackmes.de)
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name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Feb, 2002
Downloads: 1975

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Solutions

Solution by luucorp, published 18. dec, 2002; download (34 kb), password: crackmes.de or browse.

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Solution by yar0n7, published 18. feb, 2002; download (49 kb), password: crackmes.de or browse.

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Solution by figugegl, published 18. feb, 2002; download (39 kb), password: crackmes.de or browse.

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jockcranley's T0AD K3YG3N

Download T0ADK3YG3N.zip, 29 kb (password: crackmes.de)
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Key Generator.

Find the algorithm, write a keygen and post a solution :-)

Executables for:
- Mac
- Windows
- Linux

Written in C.

Good luck!

Difficulty: 1 - Very easy, for newbies
Platform: Multiplatform
Language: C/C++

Published: 03. May, 2015
Downloads: 553

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Solutions

Solution by aldeid, published 10. dec, 2015; download (107 kb), password: crackmes.de or browse.

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Solution by Kaltwa55er, published 22. jul, 2015; download (2 kb), password: crackmes.de or browse.

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Solution by vigilanz, published 19. may, 2015; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

downabc 03. May 2015	great one, but did you forgot to verify the 9 char of the password. your algorithm calculate a password contained 9 chars , but only verified the first 8 chars.
Kaltwa55er 15. Jun 2015	I think the algorithm just checks to see if there are 8 characters being used in the username and ignores anymore. Password should be 8 characters long also.
Parad0xD9 25. Jun 2015	Really fun! My first keygen. Thanks jockcranley.
acruel 01. Jul 2015	If you input only 8 chars, the 9th char will be \x0a. I think the program expect 9 chars input.
Kaltwa55er 03. Jul 2015	Guess it depends if your counting the carriage/Null terminator as the 9th characater
zbychu 22. Jul 2015	Nice :-) But IMO algorithm is buggy, anyway solved ;p
fdjkf 29. Aug 2015	very interesting fgets(s,size,stream) only accepts the first size-1 bytes,and ends the string you input with 0x00,so only 8 chars is ok. and the username is 7 bytes by using the printf() after fflush() after fgets(),very ood……
aldeid 05. Dec 2015	My solution posted here: https://www.aldeid.com/wiki/Solution-jockcranley-T0AD-K3YG3N
luxdav 31. Aug, 11:51	my solution: https://github.com/LuxXx/reverse-engineering/tree/master/toad
rni123 20. Nov, 21:11	Unfortunately, the MacOSX binaries do not work correctly (never stops on the password input, just exits immediately with access denied message) on my OSX-10.11, so I quickly ran Hopper-4 and generated the following pseudo-code, after renaming some cryptic variables: http://pastebin.com/BxbZjYFc. From a first quick glance, I suppose that the username has to have at least 9 chars and that the password is following the convention at loc_100000d68, which roughly translates to (algorithm for the keygen): int mult = var10 / 3; // var10 is unclear, probably due to r8d could be oldpass[1] for (int i = 0; i <= 8; i++) { int tmp = oldpass[i]; newpass[i] = ((mult ^ tmp) & 60) + 48; mult = 3 * ((mult ^ tmp) & 60); } Since I can't test it, writing a keygen is pointless at this point.
Mithreindeir 23. Nov, 02:13	Only the windows version works, fun keygen though.
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JoeMama's JM-CrackMe#1

Download jm_crackme1.zip, 82 kb (password: crackmes.de)
Browse contents of jm_crackme1.zip

Serial (Very easy)

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 14. Jan, 2004
Downloads: 1330

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Solutions

Solution by ManSun, published 16. jan, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by Kabbalah, published 15. jan, 2004; download (1 kb), password: crackmes.de or browse.

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JoeMama's JM-CrackMe#2

Download jm_crackme_2.zip, 25 kb (password: crackmes.de)
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Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 15. Jan, 2004
Downloads: 1283

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Solutions

Solution by xyzero, published 17. jan, 2004; download (15 kb), password: crackmes.de or browse.

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Solution by ManSun, published 17. jan, 2004; download (49 kb), password: crackmes.de or browse.

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john134's serialme #1

Download crackme_p.zip, 285 kb (password: crackmes.de)
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rULeS:
1) nO patChIng
2) fInD any SuitabLe Serial NumbEr
3*) Make A keygeN

gooD lucK.

* optioNal

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 22. Mar, 2008
Downloads: 695

Rating

Votes: 4
Crackme is quite nice.

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Solutions

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Discussion and comments

Zaphod 06. Apr 2008	I have found a serial that works, but I'm not really sure what goes on in this crackme...
john134 Author 09. Apr 2008	Yes, it's not hard to find working serial :) Algorithm is not so obvious. (comment can help)
AlexAltea 27. Feb 2012	lol! I have just noticed the following integer sequence in your crackme: http://oeis.org/A001223, differences between consecutive primes. nice surprise! ;-)
AlexAltea 28. Feb 2012	I have just solved it! It was awesome. I have generated a very simple serial: k00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000F I am too lazy to 'write' a tutorial, but I have uploaded a screencast tutorial to Youtube.

JoJo's CrackMe #1 by JoJo

Download CrackMe_#1_by_JoJo.zip, 5 kb (password: crackmes.de)
Browse contents of CrackMe_#1_by_JoJo.zip

find the solution
make a Serial Retriever
and submit a tutorial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 06. Dec, 2006
Downloads: 482

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Solutions

Solution by Ank83, published 12. dec, 2006; download (170 kb), password: crackmes.de or browse.

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JoJo's KeyGenMe #1 by JoJo

Download KeyGenMe.zip, 5 kb (password: crackmes.de)
Browse contents of KeyGenMe.zip

find the solution
make a keygen
and submit a tutorial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 07. Nov, 2006
Downloads: 579

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Solutions

Solution by Ank83, published 16. nov, 2006; download (197 kb), password: crackmes.de or browse.

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jokerfox's CryptoShock 1

Download JFCS.zip, 11 kb (password: crackmes.de)
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Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 23. Aug, 2013
Downloads: 236

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Discussion and comments

jokerfox Author 21. Oct 2013	No solutions yet? Wow probably I had to raise difficulty level indicator... ...would I?
tamaroth Moderator 25. Oct 2013	No, it is difficulty 2. The reason nobody has yet written any kg and/or solution is because you wrote this in VB and people dislike reversing that language. At least you've compiled it to native code and not p-code.
evaboy 25. Oct 2013	@tamaroth: You are right man!
jokerfox Author 27. Oct 2013	@tamaroth Hmm... I wanted first to write a vb6 one. Next time I'll do some tricks for that... Such as compiling with strange compilers... Thanks for comments
tamaroth Moderator 30. Oct 2013	In any case, here's my sample key: tamaroth ABCD-EFGH-IJKL-MNOP 51554A4452433146526B64494C556C4B533077745455355055413D3D

jokerfox's CryptoShock 2

Download CryptoShock_2.zip, 598 kb (password: crackmes.de)
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╔════════
╟ Name: jokerfox_CryptoShock2.exe
╟ Language: EN / US
╟ Type: Command line Keygenme
╟ Title: jokerfox's CryptoShock 2
╟ Additional Info: Find the programming language I used :)
╟ No Patch/Selfkeygen allowed!
╚════════

Good luck!

Difficulty: 3 - Getting harder
Platform: DOS
Language: Unspecified/other

Published: 02. Nov, 2013
Downloads: 179

Rating

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Download crackserial_linux.tar.gz, 3 kb

Discussion and comments

redoC 03. Nov 2013	Bim Bam Bom Not DOS, but Win32 console app
jokerfox Author 04. Nov 2013	I hate those mistypes! -.-"
leonardonhesi 08. Nov 2013	PHP, Turck MMCache.... interesting, I'm trying to find a solution. thanks

josamont's crack serial in linux

Choose an username and find the right serial

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 16. Nov, 2014
Downloads: 501

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Solutions

Solution by arlkers, published 09. feb, 2016; download (1 kb), password: crackmes.de or browse.

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Solution by tvk6843, published 24. nov, 2014; download (2 kb), password: crackmes.de or browse.

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Solution by mrmacete, published 24. nov, 2014; download (4 kb), password: crackmes.de or browse.

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josamont's j333

Download j333.tar.gz, 358 b

Find the password. It isn't too hide.

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: Assembler

Published: 02. Dec, 2014
Downloads: 226

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Solutions

Solution by sarret, published 06. jan, 2015; download (6 kb), password: crackmes.de or browse.

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Solution by madgen, published 06. jan, 2015; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

sarret 14. Dec 2014	Sorry, I'm a complete newbie to the cracking topic, I'm pretty familiar with programming, linux and stuff though, but have only just begun trying crackmes (I've read a couple of articles yesterday and got interested, so maybe it's my new hobby). Decided to start from here but immediately got lost. Obviously gdb doesn't help because the file is stripped, but either vim straightforward or after hexdumping gives '2793246581.velvet' near the end of the file. Could you please help me? Where do I start? How can I disassemble it, for example?
sarret 14. Dec 2014	Halfway through. 'objdump -D -m i386 -b binary' helped, also 'b * 0x0', then 'r', then 'delete breakpoints' and 'x /10i $pc' worked well :) sorry for spamming, I'll keep going
sarret 15. Dec 2014	Finally cracked it. Took me about 3 or 4 hours! Awfully long :) Gonna try j444 tomorrow if I have spare time. And maybe submit solution to this one. By the way, I thoroughly enjoyed this crackme, thank you, Josep. Wish there were more Assembler/Linux crackmes.
josamont Author 16. Dec 2014	The crackme is writen in FASM objdump disassembles all bytes, so you must know where the program starts. Evan's debugger, the linux version of Ollydbg is a very good program for cracking. I recomend it. There are false clues in the strings, so don't trust everything you read.
sarret 19. Dec 2014	> objdump disassembles all bytes [...] Well, that had me scratch my head and took me most of the time, to be honest. Because I simply couldn't find the entry point and therefore couldn't place breakpoint at the start. Through test and trial I figured it out though :) Thanks for the hints, I've tried readelf (hadn't known about it before) --- wonder how I managed without it! and I'll have a look at Evan's dbg. Yeah, about false clues, I've already understood it, and it's great, I mean, the harder the more interesting! Of course, first impulse was to try 6-letter word 'velvet' :)
tvk6843 24. Dec 2014	The most important code id: LOAD:080480AA mov ecx, 6 LOAD:080480AF mov esi, offset a246581 ; "246581" LOAD:080480B4 mov edi, offset aVelvet ; "velvet" LOAD:080480B9 repe cmpsb LOAD:080480BB jz short loc_80480D0 The code compares the 2 strings to know the correct password. Just need to know that the memory of aVelvet is replaced by the entered password. So the unmodified memory is a246581. This means the password is 246581 :-)
JamsBong 30. Dec 2014	Thanks for this Josamont. This was fun. I am going to try your next one.
acruel 14. Jul 2015	Done in 5 minutes. Keep up good work! Thanks!

josamont's j444

Download j444.tar.gz, 399 b

Too easy for experts. Less easy for newbies. Find the password

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: Assembler

Published: 02. Dec, 2014
Downloads: 316

Rating

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Solutions

Solution by JamsBong, published 06. jan, 2015; download (6 kb), password: crackmes.de or browse.

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Solution by 1995parham, published 06. jan, 2015; download (866 b), password: crackmes.de or browse.

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Solution by morgan_z, published 06. jan, 2015; download (533 b), password: crackmes.de or browse.

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Discussion and comments

5p4d3r 27. Jan 2015	I had never used IDA before and I chose this to try it with on a Windows system. Fun crackme!
acruel 15. Jul 2015	Done in 10 minutes with only static analysis. Keep up the good work! Thanks!

josamont's j555

Download j555.tar.gz, 450 b

Find the encrypted password.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 02. Dec, 2014
Downloads: 142

Rating

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Solutions

Solution by vigilanz, published 22. apr, 2015; download (1 kb), password: crackmes.de or browse.

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Solution by wiewi00r, published 16. mar, 2015; download (1 kb), password: crackmes.de or browse.

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Solution by tvk6843, published 31. dec, 2014; download (1 kb), password: crackmes.de or browse.

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josamont's j666

Download j666.tar.gz, 495 b

Find the pass

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: Assembler

Published: 02. Dec, 2014
Downloads: 173

Rating

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Solutions

Solution by baderj, published 17. dec, 2014; download (280 kb), password: crackmes.de or browse.

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Solution by morgan_z, published 17. dec, 2014; download (630 b), password: crackmes.de or browse.

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Solution by weiwen, published 17. dec, 2014; download (2 kb), password: crackmes.de or browse.

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Solution by tvk6843, published 17. dec, 2014; download (2 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

aldeid 06. Mar, 13:22	Submission closed. Posting mine in the comments: https://www.aldeid.com/wiki/Write-up-josamont-j666

josamont's j777X

Download j777X.tar.gz, 9 kb

A Qt program for Linux in C++ and Assembler.
Find the serial.

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 06. Jan, 2015
Downloads: 165

Rating

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Solutions

Solution by acruel, published 12. jul, 2016; download (963 b), password: crackmes.de or browse.

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josamont's j888X

Download j888X.tar.gz, 8 kb

GUI program writen in C++ and assembler.
You must decrypt the message.

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 08. Feb, 2015
Downloads: 204

Rating

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Solutions

Solution by mrmacete, published 19. feb, 2015; download (11 kb), password: crackmes.de or browse.

mrmacete has rated this crackme as quite nice.

Discussion and comments

diosio 10. Jan 2015	Note : This needs the QT libraries installed to work.
AntonDevil 10. Feb 2015	@diosio more over, QT5 x32

josh's Groups of Five

Download TheGroupsOfFive.zip, 6 kb (password: crackmes.de)
Browse contents of TheGroupsOfFive.zip

You have to find the 17-character key to solve the challenge.

The problem:
The .NET executable contains AES-encrypted text. It waits
for you to input the correct key to display the clear text.
You may use the provided text file as a help.

The rules:
- Finding the key
- Description of the solution
- No key-posting to the discussion board, no spoilers.

If the sugggested difficulty (Level 2) seems too high or too low
just drop a notice, it will be adapted accordingly.

Have fun!

-josh

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 11. May, 2013
Downloads: 263

Rating

Votes: 3
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

Marketplace 30. May 2014	I assume this is suppose to show up? http://gyazo.com/8eecd458277e3987d8d4ae5a0b3c7d2a
totofkofun 11. Jul 2014	I have this me too after input the varialbe but i'm not sure if is correct

josh's PatchMe

Download patchme.zip, 10 kb (password: crackmes.de)
Browse contents of patchme.zip

You have to patch this software to solve the challenge.

The problem:
The Win32 executable waits for an input into the textbox and a mouseclick in the "Output" Pushbutton. If the input is correct, it outputs a text. If the exe is patched correctly, the text output is "Hello World!".
The requested solution has only one bit changed in the patched version compared to the unpatched version.

Required for a valid solution: The file offset in the exe file to be patched, together with the old value and the new (patched) value. Both values must differ by one bit only.

If you have a little Windows programming experience, it should be not difficult to solve the problem.

Have fun!

-josh

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 20. Oct, 2010
Downloads: 1029

Rating

Votes: 5
Crackme is boring.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

EvOlUtIoN 20. Oct 2010	Easy, but fun in some way. Put in textbox "130" Then change 004010EA B8 C8000000 MOV EAX,0C8 with: 004010EA B8 C7000000 MOV EAX,0C7 One bit changed and solved Bye
redoC 20. Oct 2010	evolution: C8 -> C7 it's not one bit, solution is 130, offset 0x4011B5 change 100 to 101 level 1 crackme
EvOlUtIoN 22. Oct 2010	yes true...just one stupid mistake, anyway yes, level 1 definitely.
brilight 31. Mar 2012	This program needs VC redist to be run Does not run on XP by default
cracknoob 12. Nov 2013	uau congrat guys im a total noob and isnt so easy --'
absolute_stratos 12. May 2014	Really new to reversing, took me a while to figure out the "Hello World" part but I eventually figured it out. Really enjoyed it as a noob. Thanks for making it! : )
seskissinger2 30. Jan 2015	set the static or global variable from 100 to 101. To show the "Hello World". Jmp at CMP eax, 1388 to avoid quit the program if you are in Debugger

josh's Quadratic

Download FindKey.zip, 24 kb (password: crackmes.de)
Browse contents of FindKey.zip

You have to find the key to solve the challenge.

The problem:
The .NET executable contains AES-encrypted text. It waits
for you to input the correct key to display the clear text.
The key is somewhere hidden in the attached files.

The rules:
- Finding the complete final key,
- Description of the solution
- No key-posting to the discussion board

If the sugggested difficulty (Level 2) seems too high or too low
just drop a notice, it will be adapted accordingly.

Have fun!

-josh

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 11. Feb, 2012
Downloads: 560

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by Rain [Cls], published 18. feb, 2012; download (130 kb), password: crackmes.de or browse.

Rain [Cls] has rated this crackme as quite nice.

Discussion and comments

josh Author 18. Feb 2012	@Rain Nice work!! Thanks for solving! I did not know the link you are pointing into your solution. And btw, there is also another, pure algorithmic possibility to solve!
AlexAltea 09. Mar 2012	Hi Josh! Very nice crackme. The hardest part was to figuring out 'what' to do. I coded a small program to solve the crackme completely. I also wrote about your the program -using your crackme as sample- in my blog: [SPOILER!] http://functionmixer.blogspot.com/2012/03/visual-cryptography-bruteforcer.html
josh Author 12. Mar 2012	@Alex Thnx for your nice video! Enjoyed it much! Perhaps you may think abt a sln without brute-forcing. Podría ser interesante por tu website..

josh's SMS

Download Short_Message.zip, 90 kb (password: crackmes.de)
Browse contents of Short_Message.zip

You have to embed the message "Attack at early dawn!" into an image to solve the challenge.

The problem:
The attached SW (.NET exe GUI frontend and C++ DLL backend)
contains a detector for a message hidden in an image. In case
it finds a suitably embedded message, it displays that message (and the image, too).

The rules:
Write a SW to embed a message into an image in such way that the attached detector displays it.
A valid solution contains
- The embedder SW,
- An image modified by this SW, containing the "Attack at early dawn!" message.
The image must have suffered no or only little visible distortions due to the embedding.
- Description of the solution.

You may use the attached "Lena" image for embedding.

Difficulty: You decide in case the suggested level 3 is not appropriate.
Tested on Windows 7, XP

Have fun!

-josh

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 16. Apr, 2012
Downloads: 596

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by redoC, published 28. jul, 2012; download (422 kb), password: crackmes.de or browse.

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Discussion and comments

redoC 12. May 2012	do you have functional keygen for this?
josh Author 16. May 2012	Yes, of course I have a message coder.
jfmherokiller 03. Jun 2012	I just ruled out one possibility hiding the message at the end of the file in a null buffer.
jfmherokiller 03. Jun 2012	nvm i mistyped the message
jfmherokiller 03. Jun 2012	nope i was right that does not work
mylovestar1 12. Jun 2012	Please check the short_message_crack, Two key points in the .exe and .dll
iLovro 14. Jul 2012	1 off topic question: is that lena151?
iLovro 14. Jul 2012	After a little of googling I found out that was not lena151. :)
redoC 26. Jul 2012	solution coming soon
josh Author 30. Jul 2012	nice work, redoC. You may play around with your algo and get some roubstness with respect to moderately compressed jpegs too.

jps's Crackme #1

Download app.crackme1_nitroito.zip, 11 kb (password: crackmes.de)
Browse contents of app.crackme1_nitroito.zip

NAG Screen and Name/Serial, keygen prefered :)

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 25. Feb, 2004
Downloads: 855

Rating

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Solutions

Solution by xyzero, published 08. jul, 2004; download (14 kb), password: crackmes.de or browse.

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Discussion and comments

Jube's Crackme 1

Download cmjube1.zip, 2 kb (password: crackmes.de)
Browse contents of cmjube1.zip

Crackme 1

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 2346

Rating

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Solutions

Solution by HackeRMaN, published 25. jan, 2003; download (4 kb), password: crackmes.de or browse.

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Solution by _pusher_, published 01. sep, 2002; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

Jube's Crackme 2

Download cmjube2.zip, 3 kb (password: crackmes.de)
Browse contents of cmjube2.zip

Crackme 2

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 1929

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Solutions

Solutions

Solution by jjjjj, published 05. nov, 2010; download (14 kb), password: crackmes.de or browse.

jjjjj has rated this crackme as quite nice.

Discussion and comments

xrem 29. Nov 2008	On WinXP SP2 i had error: offset 0x00000030 can't be "read"
Arkantos 12. Nov 2010	Not working in Win XP SP2.. I don't know why. It encounters an error...

Jube's Crackme 7

Download cmjube7.zip, 5 kb (password: crackmes.de)
Browse contents of cmjube7.zip

Crackme 7

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 1694

Rating

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Jube's Crackme 8

Download cmjube8_1.zip, 7 kb (password: crackmes.de)
Browse contents of cmjube8_1.zip

Crackme 8

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 1615

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

costy 18. Jul 2008	it doesn't run on my pc. !!
apuromafo 18. Jul 2008	it doesn't run on my pc. too.. is xpsp2 Platform: Unspecified/other Language: Unspecified/other maybe is thats..

Jube's Crackme 9

Download cmjube9.zip, 5 kb (password: crackmes.de)
Browse contents of cmjube9.zip

Crackme 9

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 1643

Rating

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Solutions

Solution by blackacid, published 05. nov, 2003; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

jules's rBX Crackme 10

Download rbx-crckme10.zip, 7 kb (password: crackmes.de)
Browse contents of rbx-crckme10.zip

Write a keygen for it.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 17. Dec, 2005
Downloads: 903

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Solutions

Solution by ultrasound, published 30. dec, 2005; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 17. Dec 2005	yeah, the serial fishing and patching is very easy but the objective is another: Write a keygen for it. The routine is long and not very easy...
jules Author 17. Dec 2005	Yeah, the only acceptable solution is a keygen.
astigmata 31. Dec 2005	don't understand why your solution has been accepted it's autokeygen, like me, but for me, not accepted :P

jules's rBX crackme 6

Download rbx-crckme6.zip, 207 kb (password: crackmes.de)
Browse contents of rbx-crckme6.zip

Most will find this pretty easy actually."

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 22. May, 2005
Downloads: 1003

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Solutions

Solution by Orphankill, published 27. may, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by Vohligh, published 27. may, 2005; download (951 b), password: crackmes.de or browse.

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Discussion and comments

Orphankill 27. May 2005	When you solve this successfully is the main window supposed to appear and then dissapear very quickly, or just wait for you to click the 'X' in the corner?
Vohligh 27. May 2005	The main form is all that shud remain, then click the "X" to exit.

jules's rBX crackme 7

Download rbx-crckme7.zip, 208 kb (password: crackmes.de)
Browse contents of rbx-crckme7.zip

Keygens please"

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 11. Jun, 2005
Downloads: 1266

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Solutions

Solution by TaGaDaPaF!, published 13. jun, 2005; download (208 kb), password: crackmes.de or browse.

TaGaDaPaF! has not rated this crackme yet.

Discussion and comments

Oorja-HalT 11. Jun 2005	This crackmes invaribly insist on checking user serial with a string containing unprintable chars. perphs jules would please bother with me a valid key for name:oorja org:REA
pxor 11. Jun 2005	mpOt~:\JÂ´Å¼Ë™Ãâ€žÃÂ Â´Ä…Ã–Ã‡Ã‹?
pxor 11. Jun 2005	uhh hex values 6D70104F03747E3A065C4AB4BFFFC184DDA0B4B9D6C7CB3F yeaz unprintable
jules Author 11. Jun 2005	name: oorja company: rea serial: nsDItt<\JÂ´Â¿Ã¿Ãâ€žÃžÃ´ÂµÂ½ÃžÃ€Å¸j I hope this isn't giving too much away :) Have fun.

jules's rBX crackme 7.1

Download rbx-crckme7.1.zip, 158 kb (password: crackmes.de)
Browse contents of rbx-crckme7.1.zip

Write your own keygen

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 17. Jul, 2005
Downloads: 761

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

ap0x 17. Jul 2005	Non printable characters again? No printable serial for any entered name, not eaven rBX? IntToHex to hard to use?
jules Author 20. Jul 2005	It's not too bad actually, just think laterally, but you have to write your own keygen :)
tIce 16. Jan 2006	really very easy =)

jules's rBX crackme 8

Download rbxCrckme8.tgz, 5 kb

Just write a keygen.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 05. Sep, 2005
Downloads: 676

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Solutions

Solution by lagalopex, published 28. jan, 2008; download (13 kb), password: crackmes.de or browse.

lagalopex has rated this crackme as nothing special.

Discussion and comments

devilsclaw 29. Sep 2005	you compiled this crackme on FreeBSD I'm running my own version of Linux From Scratch 6.1. the info in the elf file won't even let me run it on my system with out editing some info. offset 0xF4 you will find /libexec/ld-elf.so.1 on my system i had to change it to /lib/ld-linux.so.2 then it seems to be runing old versions of some of the libs im runing that didnt have link pointed to them so i just patched in what i had here is the list libstdc++.so.4 changed to libstdc++.so.5 libm.so.3 changed to libm.so libc.so.5 changed to libc.so.6 sure i could of just made some symbolic links but at the time this was faster for me.
jules Author 17. Oct 2005	If you need a linux version, leave a message and I'll try get one to you
lagalopex 02. May 2007	If you still have the source... a linux build would be great 8-)
lagalopex 25. Jan 2008	Well, I now can fish the serials... They work in the plain executable without any debugger/LD_PRELOAD/whatever But selfkeygening is not allowed, rigth ;)

jules's rBX Crackme 9

Download rbx-crckme9.zip, 211 kb (password: crackmes.de)
Browse contents of rbx-crckme9.zip

Write a key-file generator.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 26. Sep, 2005
Downloads: 1352

Rating

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Solutions

Solution by NoRG, published 28. sep, 2005; download (30 kb), password: crackmes.de or browse.

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Discussion and comments

jules's Rebelx crackme one

Download rbx-crckme1.zip, 10 kb (password: crackmes.de)
Browse contents of rbx-crckme1.zip

Simple crackme written in vb.net, not packed. Read the info file included for details. Please, no patching. Serials won't be effective either.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 20. Oct, 2004
Downloads: 2401

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Solutions

Solution by Misanthropic, published 18. jan, 2005; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

DreamHazard 25. Mar 2010	I haven't attempted this yet, but I had to leave a comment, I love the variable names you've used in this crackme =D Punk is not dead!

jules's Rebelx crackme three

Download rbx-crckme3.zip, 156 kb (password: crackmes.de)
Browse contents of rbx-crckme3.zip

Crackme written in delphi. Keygens please.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 26. Oct, 2004
Downloads: 4431

Rating

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Solutions

Solution by KAiN.iDC, published 03. jun, 2010; download (433 kb), password: crackmes.de or browse.

KAiN.iDC has not rated this crackme yet.

Solution by REA-CrAcKeRtEaM, published 04. dec, 2004; download (61 kb), password: crackmes.de or browse.

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Solution by LAS3R, published 28. oct, 2004; download (7 kb), password: crackmes.de or browse.

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Solution by DappA, published 28. oct, 2004; download (98 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

derekpsv 27. Oct 2012	omg just delete everything and done...

indomit 08. May 2009	Solved. It's very easy 'cos all checks are clear and there is no traps :)
jz__ Author 08. May 2009	thank you for trying :) would you please upload your solution? my crackme looks lonely all by himself.. he needs his solution to stay with♡
indomit 08. May 2009	I think I will leave writing solution to someone less advanced cracker :)
jz__ Author 08. May 2009	that's very thoughtful of you :)
skalk 13. May 2009	I solved it too.
jz__ Author 13. May 2009	@skalk yup, you got the answer!
freesoul 13. May 2009	jz can I upload a buffer overflow solution? :) try as input 1304 characters + offset 0040147F + 150 characters xD
jz__ Author 14. May 2009	@freesoul omg really? XDXDXD i recognize this crackme has bof vuln in main func, yeah sure you can upload it. i'm curious. but still, it can't be an answer because the purpose itself wasn't just to set eip to "you got it!" . the question originally was to send an auth e-mail to "answer"@gmail.com (i just fixed the success message to fit in crackmes.de :) ) but bof can't guess the answer to send an auth e-mail, right? :) but great try, really, i'm curious. XD
jz__ Author 15. May 2009	solution uploaded by skalk. what a nice solution :)
izlesa 28. Jun 2009	nice trick with KUSER_SHARED_DATA ))) but strange that your put so early in code second save of TickCountLow? sry for bad english )

K3LVIN's CRACKME #2

Download CRACKME_#2.zip, 33 kb (password: crackmes.de)
Browse contents of CRACKME_#2.zip

Try to solve this little crackme. Your aim is to find the serial and hence making a keygen. Patching and self keygenning are considered as malpractice.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 31. Jul, 2006
Downloads: 673

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by BaKaE, published 11. oct, 2006; download (284 kb), password: crackmes.de or browse.

BaKaE has rated this crackme as awesome.

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Discussion and comments

cobrasniper555 01. Aug 2006	Okay, I'm sooooo close to getting this one, but my keygen is a little weird, it's so close to the real serial but I can't figure out what's wrong. :(
zairon Moderator 01. Aug 2006	Can you tell us which is exactly your problem? It's not easy to help someone when we have no informations...
l0calh0st 01. Aug 2006	The serial consists of unprintable characters and there is noway to enter in text box ???
cobrasniper555 01. Aug 2006	My bad, I posted for the wrong crackme, sorry for taking your time! :P Lol.
zairon Moderator 02. Aug 2006	To l0calh0st: try to copy & paste from an hexadecimal editor To cobrasniper555: no problem
BaKaE 27. Sep 2006	patching is not allowed, huh ?? i patched the debugger-check illegal??
evo_it 27. Sep 2006	patching as solution is illegal, you can patch to avoid this checks, but you've to make a keygen not a patch ;)
BaKaE 28. Sep 2006	i know evo_it im nearly there im trying to code a keygen today and the right serial doesn't have unprintable characters!!

K3LVIN's SERIALME #1

Download SERIALME_#1.zip, 32 kb (password: crackmes.de)
Browse contents of SERIALME_#1.zip

Simple keygenme. Try to findout the serial for your name.

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 19. Jul, 2006
Downloads: 1245

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by BaKaE, published 26. sep, 2006; download (374 kb), password: crackmes.de or browse.

BaKaE has rated this crackme as awesome.

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Discussion and comments

BoR0 20. Jul 2006	Crackme crashes.
BoR0 20. Jul 2006	Nevermind, fixed with a reboot. Sorry
cobrasniper555 20. Jul 2006	Haha, for something so damn easy, this is hard...for me....shut up! XD
wuchuanren 23. Jul 2006	let me have a see â€¦â€¦ om
El_PuPaZzArO 11. Sep 2006	Errore di run time 5 is because the program is no good?
BaKaE 18. Sep 2006	i solved it, but it is maybe 2/10, but this crackeme is awesome and i learnd a lot from it, thnx K3LVIN
K3LVIN Author 26. Sep 2006	Really nice job BaKaE. Special thanks to u for solving and keygenning this VB crackme. I thought everybody lost interest in this due to VB.
BaKaE 27. Sep 2006	im trying to crack your second one but it is a little bit harder (clipboard and date-check)
K3LVIN Author 27. Sep 2006	Good luck BaKaE. It also has a one minute check.

kahel's kahel's crackme

Download klcrackme.zip, 10 kb (password: crackmes.de)
Browse contents of klcrackme.zip

ID/Serial

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 12. Oct, 2002
Downloads: 1007

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to KAiN.iDC »

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Discussion and comments

KAiN.iDC's KAiN [iDC] - KeygenMe1

Download KAiNiDC_-_KeygenMe1.zip, 207 kb (password: crackmes.de)
Browse contents of KAiNiDC_-_KeygenMe1.zip

Hi, This is my first KeygenMe,
All you'll need will be (+,*,-,/, and Xor Operands).

The rules are:
- NO PATCHING please!!!
- NO SELF KEYGENNING !!!

The goals are:
- Remove KeygenMe Protections.
- Make a keygen
- Write a tutorial

Created by KAiN.iDC
please submit the solutions on crackmes.de

MODERATOR NOTE: crackme has annoying start window position (bottom, left) .... may be out of view - use alt+space, M, up, up, up, up, ... to get it into view

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 04. Jun, 2010
Downloads: 567

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by yudi, published 20. jul, 2010; download (190 kb), password: crackmes.de or browse.

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Solution by CronuX, published 17. jul, 2010; download (618 kb), password: crackmes.de or browse.

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Send a message to kaiZer-by »

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Discussion and comments

Intline9 11. Jun 2010	i solved it some time ago, but mods arent processing my tutorial and solution.
TransaeriS 13. Jun 2010	I am fairly new to reversing and found this KeygenMe fun to do. I would class this one as easy but being so new it took me a while to fully understand the code. Well worth trying if your new to keygenning.
hacker2010 15. Jun 2010	@Intline9 Your Keygen doesnot work for the name "jeet".
hacker2010 15. Jun 2010	@Intline9 I think something is mising in your keygen...
Intline9 17. Jun 2010	@hacker2010 Jup, appending zero's. I did this wrong by two keygens now. Sheesh should not forget that the next time. I fixed it and resubmitted.
hacker2010 17. Jul 2010	Thanks Intline9

kaiZer-by's CrackMe #3 by kaiZer

Download CrackMe_#3_by_kaiZer.zip, 214 kb (password: crackmes.de)
Browse contents of CrackMe_#3_by_kaiZer.zip

My third crackme. Not very easy, and not "very" hard!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 28. Sep, 2006
Downloads: 1203

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by BaKaE, published 02. oct, 2006; download (421 kb), password: crackmes.de or browse.

BaKaE has rated this crackme as boring.

Solution by geeko, published 02. oct, 2006; download (201 kb), password: crackmes.de or browse.

geeko has not rated this crackme yet.

Solution by evo_it, published 02. oct, 2006; download (9 kb), password: crackmes.de or browse.

evo_it has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

BaKaE 28. Sep 2006	"not very easy", but you set it on level 1, lol btw i test it today, may some results tommorow
geeko 28. Sep 2006	Can we patch to see the "very good message"? or what do we have to do?
BaKaE 28. Sep 2006	geeko patch is to easy, we are not in preschool, or
geeko 28. Sep 2006	he didnt say what we have to do
BaKaE 28. Sep 2006	find a key code a keygen,thats enough so i said what to do, now crack this bastard
ghostz 28. Sep 2006	Ok ! Owned Thanks ! I try to write Keygen ;) @+
Kostya 28. Sep 2006	.hmm..but) i don't think that we need to keygen it) it's simply convertion to hex :)
ghostz 28. Sep 2006	Kostya : i don't think that we need to keygen it) Ok !
kaiZer-by Author 28. Sep 2006	Hey you! I say this crackme is real easy!
ghostz 28. Sep 2006	Easy ;) Good for me : I'm Newbie ! Thx ! kaiZer-by.
zairon Moderator 28. Sep 2006	From the main page: ----------------------------------------------- Sep. 01-2006 Some notes about 'Discussions and comments' section The area was born for helping newbies, talking about problems related with crackmes and so on. Unfortunatly lately there's a different usage of the area, I'm referring to comments like this one: "I created the keygen, download at ...". Most of the time there's only the exe file and only few times I have seen source (not commented) code. Well, this attitude is completely against the spirit of the site; no one will learn something from an exe file. So, why don't you try to write a decent tutorial too? From now on I'll remove every comments of this type. I hope you will understand the decision. -----------------------------------------------
evo_it 28. Sep 2006	solved and written a tutorial ;) really easy but delphi code is really a jungle :P
kaiZer-by Author 28. Sep 2006	evo_it Ok, please download your tutorial to Crackmes.de.
evo_it 28. Sep 2006	already uploaded :) i hope it will be published.
geeko 29. Sep 2006	I wanted to upload this morning, but the site was dead?!!?!
BaKaE 29. Sep 2006	not dead!! elfz asked me for ideas to improve the site >> maybe the site was reuploaded to the server btw, written a solution upload it today >> easy to understand for newbies
geeko 29. Sep 2006	some 7 hours down. elfs asked me too, but i dont see any changes.
starzboy 02. Oct 2006	y isnt anyones tut published.... i am noob at keygen....self keygen was easy !
SaXoN 03. Oct 2006	Ah Nice crackme! It's one of the first program i've ever keygenned :) I'll up a tut maybe but keep em commin! ;) SAX
kaiZer-by Author 03. Oct 2006	Thank you for your solutions and keygens! Good work!
Sotanat 14. Nov 2006	Hehe nice calculation algo but kind of easy...:p Name:Tanatos Serial:668r9\5233815353-k329[43}54$61$6E$61$74$6F$73$ algo to keygen: const:668r9\5233815353-k329[43} then add each letter's ascii from the name you enter followed by an $ Cheers
Sotanat 14. Nov 2006	hmm...actually theres a calc algo for the 668r9\5233815353-k329[43} ~~~ ^ \| for that:p
BaKaE 14. Nov 2006	@ Sotanat you did a mistake just add the hex-value of your first char of your name not every char so your code is 668r9\5233815353-k329[43}54$ try it !! it should work
kaiZer-by Author 17. Nov 2006	Yes, it's my mistake with this: Serial:668r9\5233815353-k329[43}54$61$6E$61$74$6F$73$ algo to keygen: const:668r9\5233815353-k329[43} I wanted to make looong serial, but where I read the solutions I've understood my mistake! ;)

kaiZer-by's KeygenMe #2

Download KygenMe2.zip, 261 kb (password: crackmes.de)
Browse contents of KygenMe2.zip

This is my 2nd keygenme.. Try to keygen it! Read the readme file!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 12. Dec, 2006
Downloads: 1811

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by WoCCC, published 08. jan, 2007; download (309 kb), password: crackmes.de or browse.

WoCCC has rated this crackme as nothing special.

Solution by Ank83, published 16. dec, 2006; download (157 kb), password: crackmes.de or browse.

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Solution by BaKaE, published 16. dec, 2006; download (486 kb), password: crackmes.de or browse.

BaKaE has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

Ank83 13. Dec 2006	BaKaE you keygen is not working. Regards, Ank83
zairon Moderator 13. Dec 2006	Yes, it doesn't generate valid name/serial combinations. Solution removed. Sorry for the inconvenience.
BaKaE 13. Dec 2006	sorry, but can some one send a name and a serial pleaze ??
BaKaE 13. Dec 2006	oh dammit :( now i know, why it doesnt work im sooo sorry update tommorrow sorry again
Ank83 13. Dec 2006	i will send solution too... BaKaE let me gues your compter name - it's TEST. :) Regards, Ank83
Crosys 13. Dec 2006	this is a very easy one.
BaKaE 14. Dec 2006	yes Ank83 :) fixed it and upload it again sorry, but sh** happens
kaiZer-by Author 15. Dec 2006	is this keygenme nice for u?
Crosys 15. Dec 2006	You want tutorial to this one?
kaiZer-by Author 16. Dec 2006	Thank you for your solutions! Good work! Thanks to Ank83 and BaKaE and to all who tryed to make a keygen for this keygenme!
WoCCC 29. Dec 2006	Nice keygenme. I just uploaded my solution with full tutorial inside keygen. Works with only few delphi lines. BaKaE, if it will be approved you should take a look ;)
Gotterdamerung 11. Jan 2007	after having found all the key generation process is it good to patch it and make it a self-keygen?
ALKAMIST 28. Jul 2007	i can patch ok but learning how to keygen is hard! your kgen helped me alot though :) nice eye!

kaiZer-by's Keygenme #3

Download keygenme.zip, 260 kb (password: crackmes.de)
Browse contents of keygenme.zip

i think it's nice keygenme with beautiful things...
Nice crackme - nice reversing..

Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 25. Apr, 2007
Downloads: 1039

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by profdracula, published 27. apr, 2007; download (106 kb), password: crackmes.de or browse.

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Discussion and comments

softwareguy256 28. Apr 2007	I guess I am a n00b, but this crackme ain't easy. I've been debugging for hours and I can't find the password checking code. I saw the string in the .exe is that a false hint? I don't want to give any hints, but I think I would need to set a breakpoint when a register equals a particular value.
kaiZer-by Author 28. Apr 2007	this crackme is really easy, it's easy to find a password... and, of course, read the Prof. DrAcULA's solution.
Adjiang 28. Apr 2007	Nice solved,Prof!I though it is not use RSA only multiply calculation and CRC32 for the final part.

kaiZer-by's The New Year Crackme

Download NYcrackme.zip, 285 kb (password: crackmes.de)
Browse contents of NYcrackme.zip

I made this crackme specially for NY! Nice crackme as I think!

Notes: Do not patch it! Do not find a valid serial!

Good luck, cracker!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 31. Dec, 2006
Downloads: 1099

Rating

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Solutions

Solution by boonz, published 23. jan, 2007; download (37 kb), password: crackmes.de or browse.

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Send a message to Kamax »

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Discussion and comments

boonz 01. Jan 2007	is a self-keygen ok, too? algo is pretty long...
cektop. 06. Jan 2007	Hi, I don't know if this crackme has a neat trick or it's just a bad piece of coding. Anyway, I've written a keygen which works for me, but I noticed that serial generation depends on 2 registers which are not set so they have random content. So I'm pretty sure this keygen won't work on all computers. kaiZer, comments?
boonz 06. Jan 2007	haha, cektop, just my problem, luckily zairon noticed! i'm in contact to kaiZer, and it seems he did that unintentional!
kaiZer-by Author 06. Jan 2007	I don't know why the serial generated difference! No comments ;)
jB_ 06. Jan 2007	I noticed the same problem. Initialize all your variables and it will be ok, kaiZer-by.
boonz 06. Jan 2007	just out of curiosity: is it keygenable in the current state?
cektop. 07. Jan 2007	It's always keygennable you just need one starter variable (initial value of EBX register). kaiZer, if you don't tell me I'll just consider this a coding error. I'm not going to get into how value of EBX gets there if you're just trying to cover up buggy code.
boonz 07. Jan 2007	How can it possibly be keygenable if the initial value of ebx varies between different computers?

Kamax's Crackme2Code

Download kamax1.zip, 6 kb (password: crackmes.de)
Browse contents of kamax1.zip

This is a Crackme AND Keygenme

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Jun, 2004
Downloads: 1046

Rating

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Solutions

Send a message to kamikaze »

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Solutions

Solution by CoilBuilt, published 06. dec, 2009; download (19 kb), password: crackmes.de or browse.

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Discussion and comments

mjesun 08. Nov 2008	It's compressed?!
kyongil 09. Nov 2008	This may be packed.
DigitalAcid 10. Nov 2008	Unpacking it, is easy. Eventhough Norton deleted my ImpRec :(. But there is no button to validate our input O.o ?
EsKiMo 26. Sep 2009	It uses the OnChange() event on TextBox input. There is no need for a button :)

kao's Just Started

Download kao_juststarted.zip, 3 kb (password: crackmes.de)
Browse contents of kao_juststarted.zip

ASM - name/serial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Nov, 2003
Downloads: 1823

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Send a message to kch0pa »

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Solutions

Solution by TiGa, published 15. aug, 2007; download (95 kb), password: crackmes.de or browse.

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Solution by boonz, published 15. aug, 2007; download (95 kb), password: crackmes.de or browse.

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Discussion and comments

boonz 11. Aug 2007	Any hints on the port-number, please? =)
TiGa 11. Aug 2007	netstat.exe will be happy to answer the question
boonz 11. Aug 2007	bin runnin' olly's arse off to get gold. thanks for the tip! :-)
kch0pa Author 12. Aug 2007	coding a keygen should be pretty easy if you know basic crypto, emulating the server shoudn't be much of a trouble too, but for sure, harder than coding a keygen.
kch0pa Author 15. Aug 2007	Congratulations TiGa and boonz, how was it? :)
TiGa 15. Aug 2007	If the server did more complex operations, it would have been impossible to solve without disassembling it.
boonz 15. Aug 2007	I agree with TiGa. Personally I liked it: A quite refreshing change from the usual name/serial-keygenning. Keep 'em coming!
kch0pa Author 15. Aug 2007	Standby for #2 :)

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Discussion and comments

kcom's Nag Screen 1

Download crackme1.zip, 711 b (password: crackmes.de)
Browse contents of crackme1.zip

This is just my first crack me a simple nag screen

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. May, 2003
Downloads: 1594

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Solutions

Solution by TWiST, published 13. mar, 2006; download (7 kb), password: crackmes.de or browse.

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Solution by nefarious, published 22. may, 2003; download (1 kb), password: crackmes.de or browse.

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Solution by barcode_, published 05. may, 2003; download (2 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

dila 15. Mar 2006	You can do a single byte patch by replacing the hOwner argument of MessageBox with an invalid parent handle. The parent window doesn't exist, and so the MessageBox is never shown. The program doesn't check the error code of the api call, so the failure goes unnoticed.
l0calh0st 15. Mar 2006	that was the solution i sent..but mods rejected saying that submission is closed even though it was opened at that time...i think mods should close the submission as soon as they got enough solutions :/
zairon Moderator 15. Mar 2006	l0calh0st: the submission is still open but we don't need 3 or 4 almost identical solutions.
l0calh0st 15. Mar 2006	My solution was different from the posted....that;s why i decided to post..you know this trick is little but still comes handy
l0calh0st 15. Mar 2006	And why does it says now "The submission of solutions is closed." :)

keciciler's CrackMe By CouLomB

Download CrackMe_by_CouLomB.zip, 15 kb (password: crackmes.de)
Browse contents of CrackMe_by_CouLomB.zip

Ok i am new in here so i made this small crackme program...So its written in VB.Net and its asking u the correct serial which is according to ProductID and ur Name...
U just need work&Think on it its pretty easy but not much easy cause u cant open.Net applications in SmartCheck...etc

So Good Luck with it u can do it in anyway u want...After this try my RemoveMyTrial Program...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 11. Jul, 2008
Downloads: 438

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by obnoxious, published 15. jul, 2008; download (6 kb), password: crackmes.de or browse.

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Solution by costy, published 15. jul, 2008; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

keciciler Author 11. Jul 2008	I will upload the new version soon which is more harder cause everytime u run,program will give a unique ProductID....etc
Bispoo 11. Jul 2008	ok ok... Pm sent to u :) this is more like level 1 i think
keciciler Author 12. Jul 2008	Thnx for the pm ur name&serial was right... Exact this one was very easy anyway new version i think will be more hard with unique productID's and diffrent Serial Maker should be fine...
starlight 13. Jul 2008	But why on my computer, Application failed to initialize :(
simonzack Moderator 13. Jul 2008	@starlight: do you have .net framework? if you don't, download at microsoft
basfreak 13. Jul 2008	keciciler is your new version removemytrial or are you uploading a new one soon?
Neket110 06. Oct 2012	Took me 20 seconds to crack it

keciciler's RemoveMyTrial by CouLomB

Download CrackMe_by_CouLomB.zip, 13 kb (password: crackmes.de)
Browse contents of CrackMe_by_CouLomB.zip

This program is my second release on this site...So it's getting harder now.This one also written in Vb.Net and its unpacked and non-protected but u cant open it with SmartCheck...

Basicly this program has a trial protection in his own code...So Everytime you run my program trial times are going down...So i add 10 Times of Trial for u guys so u will have 10 chance to remove this trial or program will stop working...
Once you remove my trial after 10 times of run on the form1 click to button "Did you remove my Trial ? to check if u cracked...

So GoodLuck with it and you can do it in anyway u want....See u in next crackme guys

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 11. Jul, 2008
Downloads: 545

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Jim~, published 15. jul, 2008; download (2 kb), password: crackmes.de or browse.

Jim~ has rated this crackme as nothing special.

Solution by costy, published 15. jul, 2008; download (14 kb), password: crackmes.de or browse.

costy has rated this crackme as quite nice.

Send a message to Kemicza »

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Discussion and comments

Bispoo 11. Jul 2008	:) Pm sent to you keciciler , not gonna send solution for this. too easy.
keciciler Author 12. Jul 2008	Omg u r so fast bro or u shouldn't answer for this level :D Yeah ur patch is right...Actually there was 2 way to do it i will wait if some other guys will may answer also...
simonzack Moderator 12. Jul 2008	@ keciciler sent ur a PM lol bispoo, u seem fast at every crackme, ur an expert :D
Bispoo 12. Jul 2008	yeah, im an expert at lvl 1-2 crackmes only, lol theyre easy, im no expert men. :D
Jim~ 12. Jul 2008	This crackme is a bit buggy - or just plain strange. :S Anyway, I solved it without patching the executable. Solution submitted. :P
obnoxious 13. Jul 2008	uuu jim that sounds cool . btw i patched the crackme.
costy 15. Jul 2008	Jim~ solution is a lot better then mine.

Kemicza's A Crackme

Download acrackme.zip, 12 kb (password: crackmes.de)
Browse contents of acrackme.zip

A crackme ,, Enter the 3 Correct codes, good luck

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Apr, 2004
Downloads: 1755

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Solutions

Solution by xyzero, published 24. apr, 2004; download (10 kb), password: crackmes.de or browse.

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Solution by nEo_TheOne, published 24. apr, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 24. apr, 2004; download (2 kb), password: crackmes.de or browse.

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Kemicza's Crackme1

Download login.zip, 4 kb (password: crackmes.de)
Browse contents of login.zip

Noob Cracker :D

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. Mar, 2004
Downloads: 1276

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Solutions

Solution by Bytedevil, published 28. mar, 2004; download (496 b), password: crackmes.de or browse.

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Solution by nEo_TheOne, published 28. mar, 2004; download (552 b), password: crackmes.de or browse.

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Solution by xyzero, published 27. mar, 2004; download (476 b), password: crackmes.de or browse.

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Solution by |replay|, published 27. mar, 2004; download (1 kb), password: crackmes.de or browse.

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Kemicza's Crackme2

Download crackme2.zip, 6 kb (password: crackmes.de)
Browse contents of crackme2.zip

Crackme2

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. Mar, 2004
Downloads: 1229

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Solutions

Solution by Bytedevil, published 28. mar, 2004; download (878 b), password: crackmes.de or browse.

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Solution by nEo_TheOne, published 28. mar, 2004; download (617 b), password: crackmes.de or browse.

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Solution by xyzero, published 27. mar, 2004; download (1 kb), password: crackmes.de or browse.

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Kemicza's Crackme3

Download crackme3.zip, 6 kb (password: crackmes.de)
Browse contents of crackme3.zip

Crackme3 by Kemicza

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. Mar, 2004
Downloads: 1137

Rating

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Solutions

Solution by nEo_TheOne, published 28. mar, 2004; download (543 b), password: crackmes.de or browse.

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Solution by xyzero, published 27. mar, 2004; download (656 b), password: crackmes.de or browse.

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KernelHunter's KernelHunter's UnpackMe 1

Download KernelHunter__s_UnpackMe_1.zip, 43 kb (password: crackmes.de)
Browse contents of KernelHunter__s_UnpackMe_1.zip

This one is trivial KeygenMe, protected with my packer.
Anti-debug/Anti-Re tricks are used.

Your task is to:

1.Obtain clean dump of protected exe (get rid of protection layer)
2.Do keygen
3.Make Auto-Unpacker (if you feel good enough :)
4.Write good solution for others to learn.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 17. Sep, 2009
Downloads: 544

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Solutions

Solution by alex_ls, published 11. feb, 2010; download (74 kb), password: crackmes.de or browse.

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Send a message to kewlkish »

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Discussion and comments

Coderess 17. Sep 2009	In archive AV found Win32/Kryptik.BY
_pusher_ 17. Sep 2009	its a false detection :)
cyclops Moderator 17. Sep 2009	If every custom packed exe==virus?You have a crappy AV :P Nice crackme, but easily keygennable. The anti-attach was good ;)
kao 18. Sep 2009	Way too easy for level 4. While technically you could call it a packer (since it compresses data), it behaves more like a cryptor - compressed data contain original exe with all the headers and import table and relocations. It's a matter of one good breakpoint to extract that. ;)
KernelHunter Author 18. Sep 2009	Well, i wasnt sure about the difficulty level.Maybe i have little overestimated it. False-detection rate is very big 13/41 virustotal. (shame on u Avers :) )
DigitalAcid 18. Sep 2009	Well, that's because virii use more and more packers/crypters to avoid detection =).
D-Jester 27. Sep 2009	I can't even get this to run on Windows 7
KernelHunter Author 27. Sep 2009	I have tested it at xp sp3 and vista64. If the problem had occured under debug-environment, maybe it was one of anti-tricks doing its job.
luckysundog 30. Sep 2009	USER: luckysundog SERIAL: COMP-48009948-313
luckysundog 30. Sep 2009	1) crypted with some polymorphic cryptor. maybe, this cryptor is used with some malware :) 2) cryptor has no ability of stripping mainicon (and other necessary stuff) from resources. crypted file doesn't have icon, uncrypted does :) 3) it changes imagebase, supposing it somehow protects from unpacking :) 4) gently patches PEB, making our work too easy ;) 5) doesn't protect import table at all 6) keygenme has a very stupid serial check algo conclusion: author should make a more powerful unpackme for us. i wish he can ;) but this unpackme demonstrates only his laziness
KernelHunter Author 02. Oct 2009	Even when binary is crypted with polymorphic crypter,that doesn't mean its malware. Thx for your suggestions luckysundog.
luckysundog 02. Oct 2009	is it just packer? no. packer is better when it has size less. it doesn't need polymorphic. and it's useless for protection - it doesn't have even stupid anti-debug =) so i supposed this is malware cryptor ;)

kewlkish's kishores first crackme

Download Crackme01_by_k!shore.zip, 6 kb (password: crackmes.de)
Browse contents of Crackme01_by_k!shore.zip

no bla bla just find the right serial

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 17. Aug, 2004
Downloads: 3209

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by FrostByte, published 07. dec, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by idq000, published 20. aug, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by necronom, published 20. aug, 2004; download (554 b), password: crackmes.de or browse.

necronom has not rated this crackme yet.

Solution by aSieR, published 20. aug, 2004; download (1 kb), password: crackmes.de or browse.

aSieR has not rated this crackme yet.

Solution by thomas.idpz.net, published 20. aug, 2004; download (919 b), password: crackmes.de or browse.

thomas.idpz.net has not rated this crackme yet.

Solution by LuCiFeR, published 20. aug, 2004; download (678 b), password: crackmes.de or browse.

LuCiFeR has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

skapunky 18. Sep 2007	This crackme is very very easy. But i'm learning with this.
LeeviON 29. Nov 2008	Yeah. Second crackme that i have cracked all by myself :S (i registered today, so..)
Rapido 23. Feb 2009	idq000 this is very bad solution this is not a solution,only cracked! very bad tutorial.!
Rapido 23. Feb 2009	LuCiFeR search for all -> intermodular calls <<<in this vbStrCmp. is not exist! i found this in name label for current module! why?
LiaMircea 12. Jun 2015	00409EF8 50 PUSH EAX UNICODE Mircea" 00409EF9 68 609A4000 PUSH 00409A60 UNICODE "k!shore the keWL" 00409EFE FF15 3C104000 CALL NEAR DWORD PTR DS:[<&MSVBVM60.__vbaStrCmp>]

khanete's crackme #1

Download khanete_crackme1.zip, 6 kb (password: crackmes.de)
Browse contents of khanete_crackme1.zip

name / serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Apr, 2001
Downloads: 1807

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by luucorp, published 18. dec, 2002; download (11 kb), password: crackmes.de or browse.

luucorp has not rated this crackme yet.

Solution by nh, published 18. apr, 2001; download (4 kb), password: crackmes.de or browse.

nh has not rated this crackme yet.

Solution by sphinx, published 18. apr, 2001; download (5 kb), password: crackmes.de or browse.

sphinx has not rated this crackme yet.

Solution by the+q, published 18. apr, 2001; download (70 kb), password: crackmes.de or browse.

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Solution by detten, published 18. apr, 2001; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

_khAttAm_'s _khAttAm_'s KefileMe v2

Download _khAttAm_.kfmv2.zip, 95 kb (password: crackmes.de)
Browse contents of _khAttAm_.kfmv2.zip

hey ppl,
It's me again. This time I've come up with a Kefile-Gen-Me. As the name suggests, you will need to find a valid keyfile for your name and make a Keyfile generator. It may prove to be very difficult, but isn't impossible, trust me I have made it. If you are successful, you can even see the source of the whole crackme, which is included, but is password protected. The password is the Registration Code for my name "_khAttAm_" in the Keyfile.

Note that it runs properly in XP only. In other platforms, I haven't tested it and I think it does not say registered even if there is a valid keyfile..............

Warning:
Not for newbies, it may cause nervous breakdown :D

Difficulty: 7 - Very hard
Platform: Windows
Language: Unspecified/other

Published: 24. Jul, 2005
Downloads: 901

Rating

Votes: 6
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

ap0x 27. Jul 2005	I have just downloaded it and unpacked it... The thing i want to know is what is that code scrambler used on UPX. Do you mind telling us...
_khAttAm_ Author 27. Jul 2005	Ok ap0x........ It's UPolyX 0.4...............
_khAttAm_ Author 27. Jul 2005	And good luck ap0x.......... Hope you'll write a tut to my crackme.............. I really love to see tuts on my crackmes...............
deroko 05. Aug 2005	noooooo =) why VB why =) uhhhhh this progy goes from one dir to another =)
deroko 06. Aug 2005	huh I've patched kfm__1.tmp to create keyfile with my name, but I'm not sure if this is right solution? Now it prints registered to deroko... and this VB is really killing me...
deroko 06. Aug 2005	yap, but I've set BPs on CreateFileA and CreateFileW, also on CreateProcessW to see what is going on, but CreateFileA is called only for checking if keyout.tmp exists, which is generated by kfm__1.tmp... I don't see any keygen routine or anything like that so I guess that patching kfm__1.tmp with my name is solution =( _khAttAm_ ?
_khAttAm_ Author 06. Aug 2005	Come on konstAnt, Dont act smart............... Two weeks ago, I've already shown you how this crackme works and the valid keyfiles too................. And you've got the wrong one.......... Here is NO LOADER............ That was another one.............. Have you even tried this one?? hehe :D.....peace and derko........ Hope you've tried hard....... But I've stated clearly and will like to state, well if I haven't, that .......... "NO PATCHING" It isnt so silly as writing keyout.tmp and writing your name on that, come on........... And thats why it is level 7 (Very Hard) :) And keygen routine?? for a keyfile-gen-me............ Remind you, your target is to make a Keyfile-Generator for any name............... Let me give you a hint, the keyfile will have the name "jammin.key" and should reside in the same folder where the crackme is running from.................... If you wish to see some valid Keyfiles, you may ask........... And yet another hint, the original checking routine is in kfm__1.tmp.................., :D
deroko 06. Aug 2005	yap I've seen that jammin.key and made it, but couldn't finc routine that cheks for it =) maybe to deep harder =)
deroko 06. Aug 2005	ahh bunch of spelling mistakes... huh it is going to be a long night...
deroko 07. Aug 2005	004033BC FF2485 C4334000 JMP DWORD PTR DS:[EAX*4+4033C4] ahh just to see how this thing fits in, 9, 0a, 0d can't be used so some other address is used... 20 neither... huh =) Just to find working address... or we have decoy =) I'll find out very soon...
deroko 07. Aug 2005	huh I got lost with all this 22/2c/24/09/0a/0d/20 =) Also there are some checks for stringlen (30) and as I fugured there should be 24 13/14 times so this would be incremented: 004010F7 E8 74250000 CALL dumped3_.00403670 004010FC 83F8 24 CMP EAX,24 004010FF 74 05 JE SHORT dumped3_.00401106 to follow last je and increment some data... not sure yet... huh, very tough crackme...

_khAttAm_'s _khAttAm_'s Keyfile Me v1

Download kfm1.zip, 43 kb (password: crackmes.de)
Browse contents of kfm1.zip

Very Hard Keyfile-Me..........
Read the Readme for details.............

Difficulty: 7 - Very hard
Platform: DOS
Language: Unspecified/other

Published: 18. Jul, 2005
Downloads: 784

Rating

Votes: 6
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

_khAttAm_ Author 13. Sep 2005	Maybe, I'll stop writing crackmes for a while............. I'd like to see solutions to my crackmes...................... Please geeks, try me............
_khAttAm_ Author 13. Sep 2005	Out of my 18 crackmes, only 5 have solution......... Others are still uncracked............. Please try those..............
konstAnt 14. Sep 2005	Yah... none one bothers to try your crackmes.........
HMX0101 14. Sep 2005	the keyfile is exgf.key, that is right??? if you create this file the crackme write in this file babu, for what??? if the exgf.key no have nothing the crackme delete the file, for what???
trope 14. Sep 2005	try writing easier ones - when you write harder ones, your audience is limited. and out of the limited audience, you then even have a more limited group that will try and succeed. if you are wanting posted online recognition for your crackmes, you will need to appeal to the wider audience. Afterall, the vast majority of the users on this site are learning. just my 2 cents...
_khAttAm_ Author 14. Sep 2005	Thanks trope for the suggestion @HMX0101 If you haven't read the readme, it says: ">>Invalid keyfile may lead to damage to the keyfile." Now, if you create the file, the crackme writes "babu" which is the part of the protection algo......... and the file can also be deleted.... If the keyfile is original as intended, no such errors occur.......... If you want the keyfile, I can send it to you......... but better try to solve it yourself

_khAttAm_'s _khAttAm_'s Keyfile Me V3

Download Keyfile_Me_V3.zip, 30 kb (password: crackmes.de)
Browse contents of Keyfile_Me_V3.zip

Yeah........... You'll enjoy this one......

Read the Readme included...........

Difficulty: 6 - Hard, for very professionals only
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 27. Aug, 2005
Downloads: 702

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by MACH4, published 14. may, 2014; download (346 kb), password: crackmes.de or browse.

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Discussion and comments

Xacker 28. Aug 2005	hey budd, the AV says that it's infected with a VX.. any comments?
zairon Moderator 28. Aug 2005	No virus detected here.
_khAttAm_ Author 28. Aug 2005	No viruses.............says KAV with latest updates....
Xacker 28. Aug 2005	that's what I can tell from debugging.. no weired jmps or calls.. tnx
_khAttAm_ Author 18. Oct 2005	Ok..... anyone solving it?? No one solving my crackmes?? Please have a look at my crackmes.......... Write a brute forcer and find the key, it is that easy.............

_khAttAm_'s _khAttAm_'s Patch Me v2

Download pm2.zip, 112 kb (password: crackmes.de)
Browse contents of pm2.zip

Please Refer the Readme...

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 05. Dec, 2005
Downloads: 1390

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by HMX0101, published 09. apr, 2006; download (249 kb), password: crackmes.de or browse.

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Discussion and comments

Tenshi 08. Dec 2005	i have unpacked it but then there is an error....cant find script....... what language u've use'd ?
Ox87k 08. Dec 2005	Compiled By - AutoIt <- in readme file ;) yeah, also I have unpacked it but same error... i don't know if i'm wrong or the packer has been modified :?
Tenshi 09. Dec 2005	if i unpack it and scan it again then peID says that its compiled with VC++, i think its an modified packer..... and what the **** is AutoIt ??? never heard before.....
Tenshi 09. Dec 2005	ok lokk here hxxp://www.autoitscript.com/ there is an unpacker for autoitscripts....but the unpacker cant unpack it.....so if the unpacker for autoit cant unpack there must be something else
Tenshi 09. Dec 2005	ahhh u have to insert the password to unpack it by the unpacker.....mhhh may be we can fish the serial for unpacking it
Tenshi 09. Dec 2005	ok with the autoit unpacker it cant be unpacked because the user can say that he doesnt want to decompile it in future so _khAttAm_ say why the error appears....
_khAttAm_ Author 09. Dec 2005	haha............ Actually, the error is a CRC check error............ Not only after unpacking, but the error appears even if you change any byte of the program.........................................................
BootLoader 10. Dec 2005	it cant be patch. but it can be decompile to back in .au3 file. all we have to do is to find the password that _khAttAm_ put on it. :)
modchip 10. Dec 2005	hmmmm... what do you mean it cant be patched?
konstAnt 10. Dec 2005	What if the decompile option isn't ticked????
BootLoader 10. Dec 2005	if the program compiled in autoit it's automatically pack by UPX, like the author said, if you change anything on the program, it returns an error which is CRC check error.
DeepBlue 11. Dec 2005	Yes. So find a way to bypass the CRC-Check, find the script and patch it.
thE Cur!ouZ 18. Mar 2006	Well done...Unpacked..Fixed and patched...and it's realy a sexy crackme khAttAm.. someone want a tut for this crackme !!

_khAttAm_'s _khAttAm_'s unFSG me

Download unFSGme.zip, 21 kb (password: crackmes.de)
Browse contents of unFSGme.zip

_khAttAm_'s unUPX me
------------------------
This is a simple crackme. You need to patch it.
It says a joke for the first time and if you click
say another joke, then it gives a trial nag. Patch
it so that it says jokes as many times as we click
on the Tell me another Joke button.

But you will need to unpack it first.

Although, it says jokes, it is the most boring
crackme, you'll ever get.......... Try it....

Refer to readme included, for further details.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 19. Aug, 2005
Downloads: 1036

Rating

Votes: 7
Crackme is boring.

Rate this crackme:

Solutions

Solution by _HellDashX_, published 25. aug, 2005; download (36 kb), password: crackmes.de or browse.

_HellDashX_ has rated this crackme as quite nice.

Solution by deroko, published 23. aug, 2005; download (15 kb), password: crackmes.de or browse.

deroko has rated this crackme as quite nice.

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Discussion and comments

_khAttAm_ Author 20. Aug 2005	Greetz to deroko, hagger, Oorja and all.......... unFSGme is out.......... Hope you try this too........ Yeah the same WriteProcessMemory and sh!t......... But more phun.....
deroko 20. Aug 2005	yap nice one, I'll have to take a look later and code fast progy to repair FSG b/c I don't have time right now to do that, and manualy fixing is ... well really annoying =) Best regards =)
deroko 22. Aug 2005	argh whoo voted boring?!?!?! nm, found all inline pathes you've made =) huh this was kewl, just to fix all this suff now =) and I'll to try to crack your progy =)
deroko 22. Aug 2005	dumped sucessfully, now only have to crack it =) Maaan really awesome crackme, I don't know why but I like it very much =)
deroko 22. Aug 2005	yah, got it, solved whole crackme, gona submit solution tomorow b/c I'm really tired and Friday the 13th part 7 is on TV =)) Best regards...
_khAttAm_ Author 22. Aug 2005	Well............. Great deroko......... You Rock...
deroko 22. Aug 2005	ahh I submitted solution around 7:00, I couldn't sleep =( and it's still "pending" =)
konstAnt 23. Aug 2005	Wow the jokes were superv......................
_khAttAm_ Author 23. Aug 2005	Ok....... Well done deroko....... You shud wait for another crackme from me...... And BTW, there are a lot of unsolved crackmes from me, which you can solve while you are waiting.......... LOL....
deroko 23. Aug 2005	=)))) I'll try that keyfileme again =)

_khAttAm_'s _khAttAm_'s unNagMe v2

Download unNAGmeV2.zip, 9 kb (password: crackmes.de)
Browse contents of unNAGmeV2.zip

Hi ppl,
This is _khAttAm_ here...... I have come up with yet another crackme..... It is called unNag me v2. You need to remove the nag that comes up with the program loading. It is very easy, but not as easy as you might have thought. It will be a good exercise for a newbie....

Best of luck

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 05. Oct, 2005
Downloads: 812

Rating

Votes: 5
Crackme is good.

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Solutions

Solution by deroko, published 06. oct, 2005; download (14 kb), password: crackmes.de or browse.

deroko has rated this crackme as nothing special.

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Discussion and comments

konstAnt 05. Oct 2005	Well a nice one That's all for now now every thing is write...
_khAttAm_ Author 05. Oct 2005	What do you mean konstAnt?? have you solved it?? then solution please...................
deroko 05. Oct 2005	I did, I have subimited it 2 hours ago...
_khAttAm_ Author 05. Oct 2005	good deroko... Easy isn't it?? I think newbies will have some fun with it............. @newbies Try yourself....... You can crack it........... and if you give up (I know you won't), then only look at the solution by deroko........
syhs89 06. Oct 2005	i dun understand... is there any tutorials of softice and wat does softice does?
konstAnt 06. Oct 2005	I don't understand in this age still using softice... East or west olly is the best...
_khAttAm_ Author 06. Oct 2005	@syhs89 You gotta know about our old debugger.......... Anyways, there are better tools available now, but some while ago, that was the best debugger............. Deroko must have used softice because it is easy to dump apps using it........ by getting it in an infinite loop and then........... So you don't need to worry about dumpers........ if you can do it with softice............................ It can also be done with OllyDump or any general dumpers available...............
deroko 06. Oct 2005	well it is even easier to dump with olly =) 3 clicks only...
syhs89 11. Oct 2005	where can i find olly dump??
kishfellow 12. Oct 2005	Open in odbg, find the remove me string, and patch it.Its just kid's play.
_khAttAm_ Author 13. Oct 2005	@kingfish Please explain your way of doing it............ where should it be patched.............. yeah, if you escape the whole msgbox routine, it can be done, but it cannot be done by just patching the messagebox call.............. as deroko has mentioned, it should be patched in the inline patch................
giga 13. Oct 2005	I Think that Deroko is right =)) I kako bi on rekao s verom u boga :)

_khAttAm_'s _khAttAm_'s unNag Me v1

Download uNmV1.zip, 63 kb (password: crackmes.de)
Browse contents of uNmV1.zip

Hate nags??

So you'll hate this one......

Read the readme included for details.......

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 03. Aug, 2005
Downloads: 862

Rating

Votes: 5
Crackme is boring.

Rate this crackme:

Solutions

Solution by mr.schyte, published 04. aug, 2005; download (130 kb), password: crackmes.de or browse.

mr.schyte has rated this crackme as quite nice.

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Discussion and comments

_khAttAm_'s _khAttAm_'s unUPX me v1

Download un.UPX.Me.v1.zip, 7 kb (password: crackmes.de)
Browse contents of un.UPX.Me.v1.zip

_khAttAm_'s unUPX me v1
-----------------------

This is a simple crackme. You can patch it to accept
the correct password. But you will need to unpack the
target completely.

Target:
-------
1. Unpack completely.
2. Patch it to accept any password.

Protections:
------------
1. Packings (UPX)
2. Other Manual Protections (see for yourself)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 07. Aug, 2005
Downloads: 1273

Rating

Votes: 7
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by deroko, published 10. aug, 2005; download (18 kb), password: crackmes.de or browse.

deroko has rated this crackme as awesome.

Solution by haggar, published 10. aug, 2005; download (16 kb), password: crackmes.de or browse.

haggar has rated this crackme as nothing special.

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Discussion and comments

haggar 07. Aug 2005	This is not bad unpackme, but it's level 1-2/10 and not 4/10.
deroko 07. Aug 2005	ok cracked =) this one was really fun =)
deroko 07. Aug 2005	I added inline patch in $Tmp32.tmp after yours... I guess it's ok to do so =)
Oorja-HalT 08. Aug 2005	I think you are supposed to patch those byte while unpacking so that you have a working VB exe and then patch it so that it accepts any serial. Yeah it was fun.
deroko 08. Aug 2005	well if you patch it as VB why not make a inline patch... is is more fun =)
_khAttAm_ Author 08. Aug 2005	@haqqar Oh, really sorry.......... The first one got rejected, which was more difficult and then I uploaded this one which is level 2-3......... @derko Well done @Oorja Wats up??
_khAttAm_ Author 08. Aug 2005	Hope you all enjoy this and hope someone writes a good solution and helps the complete newbies learn...........
Oorja-HalT 08. Aug 2005	Well i tried sending you the unpacked/reversed/patched file but it bounced : attachment not acceptble(though it was zipped and raraed).
deroko 08. Aug 2005	I'll write a detail solution about this crackme (again) =)
haggar 08. Aug 2005	My solution is submited yesterday. I think it's not bad. I also send it to you via email.
haggar 08. Aug 2005	Hmm, mail failed for some reason.
deroko 08. Aug 2005	ok submitted new solution... covers unpacking/patching + making inline patch...
_khAttAm_ Author 09. Aug 2005	Oh........... inline patching is not allowed here I suppose....... coz the actual target is the unpacking.......... but fine.........
_khAttAm_ Author 09. Aug 2005	This Gmail.............. Ok send files to khattam_khattam[at the rate of]Yh00!.com

_khAttAm_'s _khAttAm_'s What is my Password

Download wimp.zip, 22 kb (password: crackmes.de)
Browse contents of wimp.zip

_khAttAm_'s What Is My Password accepts only one Serial and shows the message "Yeah, You did it Right...."................
For all other entries, it says, "Wrong Password.........."...
You need to find the correct password or Serial, whatever you'd like to call it.................
In my opinion, it is almost impossible to find the Password.................

Difficulty: 6 - Hard, for very professionals only
Platform: DOS
Language: Unspecified/other

Published: 31. May, 2005
Downloads: 1110

Rating

Votes: 3
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by ZeroCoder, published 22. jun, 2005; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

ZeroCoder 17. Jun 2005	he-he... this is 6-level maximum.. ;)) i find psw..... :))) ps i like DOS
CuTedEvil 18. Jun 2005	Hi ZeroCoder, Plz Start writing your tutorial :)
ZeroCoder 19. Jun 2005	ohhh... my english bad :(
ZeroCoder 19. Jun 2005	hmmm... peoples, may be we writeing tutorial? i can helped ;)))
_khAttAm_ Author 20. Jun 2005	Great ZeroCoder........... Hope you write the tut too............... And wait for _khAttAm_'s What is my Password 2............. coming soon............ That will be more difficult.............
ZeroCoder 21. Jun 2005	maybe, maybe ;)) ohh... wait version 2. :))
ZeroCoder 22. Jun 2005	thanks..........
_khAttAm_ Author 22. Jun 2005	Yo ZeroCoder........ Version 2 has been submitted........ Waiting for approval.. Hope you'll download it.......... and love it......... And do write how easy was the first one and how easy this one will be...................Please........... This helps me in writing better crackmes...........
ZeroCoder 23. Jun 2005	heh... ok.. i will be solving it... ;)
CuTedEvil 25. Jun 2005	Rating changed to:- 6

_khAttAm_'s _khAttAm_'s What is my Password 2

Download WIMP2.zip, 86 kb (password: crackmes.de)
Browse contents of WIMP2.zip

_khAttAm_'s What is my Password 2
---------------------------------

"_khAttAm_'s What is my password 2" is out.

Like version 1, it is very difficult to crack.

With much more programming (4 hrs, I think), I have made this crackme very-very difficult to crack.

This should be very-very difficult, if not impossible.

If you think you are good at finding passwords/serials, you should try this one.

And No Patching Please. A valid working password/serial is needed.

Best of Luck..........

PS: This crackme was written in QBASIC and thats all I'll say.....

Difficulty: 7 - Very hard
Platform: DOS
Language: Unspecified/other

Published: 24. Jun, 2005
Downloads: 809

Rating

Votes: 3
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

ZeroCoder 24. Jun 2005	hm.... it DOS??? no... packed by aspr and upx :\
ZeroCoder 24. Jun 2005	ohh... sorry, WIN with DOS... interesting... working ;)
ZeroCoder 24. Jun 2005	10 cigarettes, 5 coffee... and... the psw was found ;) hard, but again not very ;)
_khAttAm_ Author 24. Jun 2005	Really ZeroCoder?? How difficult was it?? And hope you are gonna write a tutorial again............... Love you.............
DeepBlue 24. Jun 2005	:O ZeroCoder, You're a 1337 Cracker....Respect!
ZeroCoder 25. Jun 2005	ohh... no tutorial... sorry... level 6-7 ;) deepblue: 1337?
DeepBlue 25. Jun 2005	1337 = elite, u know ?
CuTedEvil 25. Jun 2005	Rating changed to:- 7

_khAttAm_'s _khAttAm_'s What is my Password 4

Download WIMP4.zip, 29 kb (password: crackmes.de)
Browse contents of WIMP4.zip

_khAttAm_'s What is my Password (WIMP) v4
-----------------------------------------

Unlike my last 3 three crackmes (WIMP 1, 2 and 3), the protection here is quite weak. I'll rate it as VERY EASY (2-3) .........

This is for absolute newbies............

No patching, a valid password/serial is required.

Best of luck, :)

ENJ0Y!!

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: Unspecified/other

Published: 24. Jun, 2005
Downloads: 1098

Rating

Votes: 3
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

DigitalAcid 03. Jan 2008	Ok, it seemed it was packed 3 times with 3 different packers (according to my unpacker). Got it unpacked, got a 16 bit debugger, but don't know much about Dos cracking...

_khAttAm_'s _khAttAm_'s What is my Password 5

Download WIMP5.zip, 59 kb (password: crackmes.de)
Browse contents of WIMP5.zip

_khAttAm_'s what is my password v5
-----------------------------------
This is very easy DOS crackme............ It is too easy.........

Try it............

And solution will be funny...........

Q. How to use it??
>> In the command line, type WIMP5 followed by password you want to enter.....

WIMP5 mypassword

Good Luck!

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: Unspecified/other

Published: 26. Jun, 2005
Downloads: 1136

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by ap0x, published 26. jun, 2005; download (69 kb), password: crackmes.de or browse.

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Discussion and comments

_khAttAm_'s _khAttAm_'s What Is My Password v10

Download WIMP10.zip, 438 kb (password: crackmes.de)
Browse contents of WIMP10.zip

:_khAttAm_'s What Is My Password 10:
â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢

:Target:
â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢
Find a valid password.

:Note:
â€¢â€¢â€¢â€¢â€¢â€¢
You will need Liberty Basic runtimes which I uploaded to http://www.geocities.com/khattam_khattam/runtime.zip

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: Unspecified/other

Published: 21. Jul, 2005
Downloads: 845

Rating

Votes: 5
Crackme is boring.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

Oorja-HalT 22. Jul 2005	Some runtime dll files like VTHK31w is missing. Do check if all dll are included
_khAttAm_ Author 23. Jul 2005	Oh! Was that required too?? You did download the runtimes, didn't you?? Ok that file is available at http://www.geocities.com/khattam_khattam/vthk31w.zip Can you please notify me what other files are missing. It runs well in my system with the files I included........ Sorry for that

_khAttAm_'s _khAttAm_'s What Is My Password v11

Download WIMP11.zip, 68 kb (password: crackmes.de)
Browse contents of WIMP11.zip

_khAttAm_'s What Is My Password v11

Heha

Yet another crackme by me.

Read the readme included for details.

This one is made only in VB and some protections added.

ENJ0Y!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 31. Jul, 2005
Downloads: 796

Rating

Votes: 5
Crackme is nothing special.

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Solutions

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Discussion and comments

Oorja-HalT 31. Jul 2005	Gosh you can never get tired. Just think of it an executable archieve that have an executable thats packed with modified UPX and when you unpack that its plain C++ but hold there is still more to come because ultimately its a p-code VB thats incorpoated in the main C++ exe ,from another temp file in teh archieve ,as a process. Mi mind s reeling. Guess i woud never touch those wimps again even with a pole.
_khAttAm_ Author 01. Aug 2005	Oh I'm laughing hell........... Ok fine.......... How far along did you get with that?? Did you do the thing?? And solution please............
_khAttAm_ Author 09. Aug 2005	And if you cant see the original Right Code message in the dissembly of WIMP11 too, then please do have a look at here: http://www.geocities.com/khattam_khattam/wimp11rc.jpg
Oorja-HalT 09. Aug 2005	shit that was a slip Cant helpit with so many wimp flying around. But you could have said that in two line instead of wasting so much space
_khAttAm_ Author 09. Aug 2005	Its a part of the protection, actually............ but it is easy......
Oorja-HalT 09. Aug 2005	What i meant was the disassembly of the wimp11 that i intended to send you didnt seems to have a right message code. BTW i am still trying to figure out LitDate bit .How do you get that
_khAttAm_ Author 09. Aug 2005	Yeah..the dissembly may not show the right message code........... Thats a protection....................... Trace a little............. you'll find out............ I repeat, it is easy.,............
deroko 10. Aug 2005	heh you never get tired of WriteProcessMemory =)

_khAttAm_'s _khAttAm_'s What Is My Password v13

Download _khAttAm___s_What_Is_My_Password_v13.zip, 29 kb (password: crackmes.de)
Browse contents of _khAttAm___s_What_Is_My_Password_v13.zip

Hey Yo Ppl..........

This is a "What is my password" based on entirely different types of checks. You might not have seen checks like this, so shud be new for you. Hope you'll enjoy it............

No patching. You shud find a valid password.

Ok, if you find that *Very Hard*, you may also patch it for fun...

But the original solution shud contain a valid password....

Anyways, have fun.......................................

Difficulty: 7 - Very hard
Platform: Windows
Language: (Visual) Basic

Published: 27. Aug, 2005
Downloads: 941

Rating

Waiting for at least 3 votes
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Solutions

Solution by deroko, published 21. sep, 2005; download (33 kb), password: crackmes.de or browse.

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Discussion and comments

deroko 18. Sep 2005	patched, is it ok to submit solution like that? b/c I see patching as one option =)
deroko 19. Sep 2005	come on, I wanna post my 1 byte patch =))
konstAnt 20. Sep 2005	[quote] Hey Yo Ppl.......... This is a "What is my password" based on entirely different types of checks. You might not have seen checks like this, so shud be new for you. Hope you'll enjoy it............ No patching. You shud find a valid password. Ok, if you find that Very Hard, you may also patch it for fun... But the original solution shud contain a valid password.... Anyways, have fun....................................... [/quote] Here above it is clearly said that no patching. It is not best to speak from _khat_'s side. I hope he still doesn't mid it...
deroko 20. Sep 2005	nah don't wanna even bother analyzing this vb loops, this one byte works fine for me...
deroko 20. Sep 2005	@konstAnt: [quote] Ok, if you find that Very Hard, you may also patch it for fun... But the original solution shud contain a valid password.... [/quote] well it sais "you may patch", and solution "should" which is not same as "must" or "have to", so I'll submmit 1byte patch and it's up to moderators to decide =)
_khAttAm_ Author 20. Sep 2005	Thats smart deroko.......... Ok submit the solution.. let the mods decide... but you must know that you havent yet solved it completely.... The original solution shud contain a valid password............ Actually, if its a 1 byte patch, then the crackme wouldn't be rated 7, it would be 2-3.......... coz I've worked on the serial here.............. If you love patching, you should try the Kefile-Me v1, which shud be a bit difficult than this one, but again, the solution there should contain a valid keyfile, which is again a problem.............
deroko 21. Sep 2005	just give me one reason why anybody should follow all those loops instead of changing one byte!?! and you said that we may patch it for fun, so why not share fun with others? and it also seams that I'm the only one whom at least tried to solve it... and for the record it doesn't metter if it gets approved or not, b/c I've learnt something =) and you can always find solution at my hm, just follow link that I gave at hellraiser 6 discussion.
_khAttAm_ Author 21. Sep 2005	Ok great........ I appreciate it........ Try patching Keyfile Me V3 too... Best of luck with that............. It shud be a bit more difficult.........
_khAttAm_ Author 21. Sep 2005	But, quite odd I think......... There's a solution to a crackme called "_khAttAm_'s What Is my PASSWORD" and there is no password.....
deroko 22. Sep 2005	man, you got really abset. it is just crackme made for fun and to be solved just for fun, c'mon.
_khAttAm_ Author 22. Sep 2005	Ok.......... For all you noobs......... I'll give out the password so that you can try to figure out how the crackme and the checking actually works.... The valid password for the crackme is "Se*y 0oRjA", without the quotes..................................... Have fun, hehe
konstAnt 23. Sep 2005	Well _khAt_ u r so kind..........................lol:

_khAttAm_'s _khAttAm_'s What Is My Password v14 + Copy Me To HDD

Download WIMP14.zip, 128 kb (password: crackmes.de)
Browse contents of WIMP14.zip

Please Read The Readme for Details.......

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Unspecified/other

Published: 20. Nov, 2005
Downloads: 796

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Discussion and comments

konstAnt 20. Nov 2005	Well a newer and harder one
konstAnt 21. Nov 2005	What's this 152395KB crackme... Its very hard to copy the file inside
warrantyVoider 21. Nov 2005	I donÂ´t know, copying the file took me 5 minutes. PM me if you want a hint.
warrantyVoider 21. Nov 2005	Way better: ROT13: Whfg gnxr n urk rqvgbe naq pbcl sebz "ZM" gb gur raq bs gur vzcbegf. Vg qbrfaÂ´g unir gb or rknpg, rkgen fcnpr ng gur raq bs na .rkr vf vtaberq
_khAttAm_ Author 24. Nov 2005	What was so hard about it konstAnt??
modchip 25. Nov 2005	I think he meant it takes a long time to extract
modchip 25. Nov 2005	I think he meant it takes a long time to copy
_khAttAm_ Author 29. Nov 2005	Maybe, So hasnt anyone solved it??
HMX0101 29. Nov 2005	the rar file is modified, to simulate the file is more than 1gb, i have supposed to modify the rar file to change the fake size to real size?
_khAttAm_ Author 01. Dec 2005	Actually, the RAR is not Modified.......... The ISO is actually that big and compressed............... :) The ISO is modified.........
HMX0101 02. Dec 2005	i have to change is the iso file ?
deroko 02. Dec 2005	eh you can change easily file to old value =) Extract whole file on hdd and cut unecessery size (hint last section raw + rawsize)
warrantyVoider 03. Dec 2005	That sounds like a lot of hassle. The file is not fragmented in the ISO file. Just extract the 156MB ISO file, search for "MZ", cut the thing out in a hex editor and you are done.
Game-Over 09. Dec 2005	I couldnt open source.rar, it keeps saying that archive is in either unknown format or damaged. And there are many valid serials for the exe (01234567111111C, 01234567222222= etc) but which one is valid for the rar file?
Game-Over 10. Dec 2005	Ok I extracted source.rar manually from the iso. Brute-forcer can be the option to find real serial but its somewhat hard to write?
badmojo 26. Sep 2006	Bruteforcer isnt hard .. Just make sure you include all valid (>0x2D) printable characters ... There are only a few options which you can then test manually to open the rar. The modified .iso trick was the only interesting part in this crackme... 20-30min for the whole thing, this is hardly a level 5 crackme!

_khAttAm_'s _khAttAm_'s What Is My Password v15

Download WIMP15.zip, 85 kb (password: crackmes.de)
Browse contents of WIMP15.zip

Please Read The Readme Included For Details..........

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 02. Dec, 2005
Downloads: 988

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Solutions

Solution by Ox87k, published 04. dec, 2005; download (40 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 02. Dec 2005	the entrypoint has at the end, how do fix this? :)

_khAttAm_'s _khAttAm_'s What is my Password v6

Download WIMP6.zip, 102 kb (password: crackmes.de)
Browse contents of WIMP6.zip

_khAttAm_'s What is my Password v6
-----------------------------------

This is a difficult one like wimp2. Try it if you think you are good at finding serials/passwords.

You need to find a valid password, no patching please.......

Difficulty: 5 - Professional problem to solve
Platform: DOS
Language: Unspecified/other

Published: 01. Jul, 2005
Downloads: 856

Rating

Votes: 3
Crackme is quite bad.

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Solutions

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Discussion and comments

_khAttAm_ Author 08. Jul 2005	Hey ZeroCoder......... Haven't you tried this one??
ZeroCoder 11. Jul 2005	ok... i return from siberia, you wait many time for cracking it :)))
_khAttAm_ Author 14. Jul 2005	Oh, then good luck............. You have a lot of crackmes waiting.......... You are the only one who have cracked my crackmes...... Methinks ppl here don't like 16 bit........... I think, My future crackmes will be 32 bit......... Hope you'll like that........................
Oorja-HalT 15. Jul 2005	I have done 4 and 5.
modchip 15. Jul 2005	hey, we like 16-bit! i'm trying your crackmes but too hard for me... :( but im trying...
_khAttAm_ Author 18. Jul 2005	Hey Oorja-HalT, thanks for trying my crackmes. (You are a top solver, dude)............. But you have solved 4 and 5 only?? those were lamer stuff........... Please try others too.. And modchip, thanks for trying my crackmes. If you find them very difficult, you can ask for help before giving up. I can give you hints..................
_khAttAm_ Author 19. Jul 2005	And Oorja, I don't know if you have time, but could you write a solution?? I mean for v4................. v5 has a solution and you can see it is a lamer stuff........ hehe
Oorja-HalT 19. Jul 2005	Yes 4 and 5 were lamer stuff and yes i tried all others but didnt have much success.I am concentrating on keyfile now. Hope to do it sooner or later.
modchip 21. Jul 2005	Thanks for the support _khAttAm_, i'll try more. If i ever get stuck, i'll ask for some hints...:) Hey, why don't you try my crackme?
modchip 21. Jul 2005	Hey, you're in the top coders list now. Congratulations. :)
_khAttAm_ Author 23. Jul 2005	Thanks modchip............ I'll try your crackmes too......

_khAttAm_'s _khAttAm_'s What Is My Password v7

Download WIMP7.zip, 85 kb (password: crackmes.de)
Browse contents of WIMP7.zip

_khAttAm_'s What Is My Password v7
----------------------------------
This is a very difficult dos crackme by me. It is the sixth one that has been approved in crackmes.de (WIMP3 being rejected). I would rate it 7-8 out of 10. The crackers can rate it better (I'm poor at rating, :D hehe).

Target
------
1. Find a valid password for WIMP7.exe
2. Use the password found to Unzip "_khAttAm_'s WIMP v7.ZIP" and read the Congratz.txt inside the zip file for further info about contacting me.

Difficulty: 7 - Very hard
Platform: DOS
Language: Unspecified/other

Published: 12. Jul, 2005
Downloads: 798

Rating

Votes: 3
Crackme is quite bad.

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Solutions

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ingsoc 27. Jul 2005	Why is the target packed with aspack? Why bother?
_khAttAm_ Author 28. Jul 2005	Oh........... Just.........
ap0x 28. Jul 2005	Because when you code ... smaller is better :))))
_khAttAm_ Author 28. Jul 2005	Yo ap0x........ if you've solved 'em please write solutions........ I'd like to see 'em defeated.......
_khAttAm_ Author 31. Jul 2005	And yo Oorja...... How far along have you got with this one?? Hope you found the password....... Did you patch the name too?? If so, please do write a tut.................
_khAttAm_ Author 01. Aug 2005	@Oorja You are a top solver........... Do I have to tell you taht you shouldn't give it out in public?? You can ruin fun of others....... And no solution?? Fine......... But I certainly hope you write a tut for my crackmes.........
Oorja-HalT 01. Aug 2005	I dont think i made it that obivious but your post certainly did. And yes i am sorry bout wimp8 i didnt mean that to be happened because i was amid the process of unpacking arma And i believe arma or not it was a fine crackme
_khAttAm_ Author 01. Aug 2005	Qorja said: "I dont think i made it that obivious but your post certainly did.".............. Didn't quite get you............ And fine Arma removed............. So take it on......

kidmuncher's WinCrackMe

Download WinCrackMe.zip, 5 kb (password: crackmes.de)
Browse contents of WinCrackMe.zip

This a quite easy crackme written in mvs C++.

I dont know if it is a level 1 (very easy) or level 2.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 13. Aug, 2009
Downloads: 502

Rating

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Solutions

Solution by redoC, published 09. jun, 2010; download (42 kb), password: crackmes.de or browse.

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Send a message to Killswitch »

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Discussion and comments

hinte! 15. Aug 2009	H = hash(name) Serial = A + B + C + D if (A=B=C=D=H) then good_boy A,B,C,D in base36 - every base have different string
redoC 03. Jun 2010	redoC 1IMEY-2JNFZ-3KOA0-YLPB1 Nice and easy keygenme.
Krustx 28. Jun 2010	easy to crack, i am a noob, but i will try to understand the algorythmus for the keygen =)
ductri179 20. Dec 2013	ductri J63AG-K7YBH-L8ZCI-G90DJ My first cracking, it's so sweet :)

Killswitch's GNARMOCK Windows KeygenMe

Download wutwut.zip, 11 kb (password: crackmes.de)
Browse contents of wutwut.zip

KeygenMe C++

Find a valid serial!

No patching//Write a keygen and a tutorial and submit it please ;)

GLHF

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 19. Nov, 2009
Downloads: 1008

Rating

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Solutions

Solution by fenoloji, published 21. nov, 2009; download (9 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

synak 20. Nov 2009	system time based algo... no thanks :P
agustingianni 20. Nov 2009	and cpuid quirks
HonestGamer 16. Feb 2011	Well it wasn't very easy for me. So I really doubt the Difficulty for this is correct.

Kirjava's KGM1!

Download KGM1!.zip, 227 kb (password: crackmes.de)
Browse contents of KGM1!.zip

Hey! This is my first KeygenMe.

This KeygenMe requires a bit of roleplaying:
You were at a friends place a while ago... He had this awesome application, so you went ahead and copied it. Soon enough you noticed that it is locked down.

Goals:
Crack & Keygen

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 22. Apr, 2014
Downloads: 348

Rating

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Solutions

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Discussion and comments

botanyaki 24. Apr 2014	Is this keygenme accept patching?
Kirjava Author 24. Apr 2014	Patching / self-keygenning is allowed. The point is to get a keygen though, not just crack it.
basscode 27. Apr 2014	Very nice keygen. I liked it very much.
basscode 27. Apr 2014	Submitted my solution
kondos 27. Apr 2014	it gives me error when i open it with ollydbg :) :) im new to reverse engineering is it a king of protection or failing from me :D :D ?
bill xiao 05. May 2014	title:Awesome! content: Activation success!Time for a keyge! is this right?
Kirjava Author 05. May 2014	That indeed is the goodboy message.

Kirjava's KGM2

Download KGM2.zip, 2 kb (password: crackmes.de)
Browse contents of KGM2.zip

Difficulty:
1 - Easy

Goal:
Create a keygen! Self-keygenning/patching is allowed, but discouraged.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 14. May, 2014
Downloads: 830

Rating

Votes: 4
Crackme is boring.

Rate this crackme:

Solutions

Solution by mrmacete, published 16. oct, 2014; download (5 kb), password: crackmes.de or browse.

mrmacete has rated this crackme as quite nice.

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Discussion and comments

Borgiman 16. May 2014	I find this crackme very hard, but i'm also a newbie^^ Really looking forward to a solution, so i can learn from it
evaboy 18. May 2014	What is the good and/or bad message. This is good algo though.
absolute_stratos 18. May 2014	Written both a keygen and patched it! Really fun for a noob, bit tricky with having some ollydbg analyse issues but I learned a lot. Thanks for making this! ^^
unix-dude 19. May 2014	Did a self-keygening thing for this one. Wasn't too hard, a bit of anti-analysis tricks here and there. Good job :)
zaas 24. May 2014	Can you tell me how to write the tricks in visual studio?
r0bert 26. May 2014	tr4ceflow, i'll think you'll find that was an intentional curve-ball
Kirjava Author 27. May 2014	@zaas, The tricks were done like this: http://ideone.com/weVyka
tr4ceflow 27. May 2014	I wrote an tutorial which was not accepted. An update version was uploaded now by me. > i'll think you'll find that was an intentional curve-ball I do not understand you. ------------------------------------ my removed comment: There is a bug in the crackme. If the name like "tr4ceflow" has length 9. There is a part when the crackme used int val = 10; char character = Name[9-val]; here: 004011BA . 83C9 FF OR ECX,FFFFFFFF ; ecx = FFFFFFFF 004011BD . 2BC8 SUB ECX,EAX ; FFFFFFFF - 9 = FFFFFFF6 = -10 004011BF . A1 FC164000 MOV EAX,DWORD PTR [<NamePtr>] ; hinter '-' zeigen 004011C4 . 03C1 ADD EAX,ECX ; gehe 10 Zeichen davor 004011C6 . 8B0D FC164000 MOV ECX,DWORD PTR [<NamePtr>] ; KGM2.004016AD
Kirjava Author 28. May 2014	@tr4ceflow, you will notice the "out-of-bounds" byte is always the last 0xCC of main.

Kirjava's KGM3

Download KGM3.zip, 20 kb (password: crackmes.de)
Browse contents of KGM3.zip

Rules:
1. No patching!
2. A valid solution has a keygen and a tutorial!

Extra info:

Just a very simple algo with some anti-analysis tricks.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 09. Jun, 2014
Downloads: 290

Rating

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Solutions

Solution by anubis13, published 18. feb, 2015; download (380 kb), password: crackmes.de or browse.

anubis13 has rated this crackme as quite nice.

Solution by zairon, published 21. jan, 2015; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

cl0pen 28. Jun 2014	To what extent did you write inline assembly in this? I feel like there's some nasty tricks going on to prevent disassembly with IDA.
Kirjava Author 29. Jun 2014	Just enough to mess with IDA/Hex-rays.
spawncpy 29. Jun 2014	Idk whats wrong but there are some solutions against IDA this is cool
Kirjava Author 29. Sep 2014	Patching the tricks is ok. They should stand out like a sore thumb anyway. Also, I forgot to tell in the description that this is a VM crackme.
halsten 28. Nov 2014	That was a nice one Kirjava. Surely confuses IDA, but not for the experienced ones. Fun to play with on a weekend. Keep them coming.
naksuasd 03. Dec 2014	I know patching wasn't allowed, but it help'd me to understand how Ollydbg works. Also finland ftw :)

Kirjava's KGM4

Download KGM4.zip, 2 kb (password: crackmes.de)
Browse contents of KGM4.zip

/* Kirjava's KGM4 */

Goal:
Make a keygen! Self-keygenning/patching is allowed, but discouraged.

Good luck and have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 22. Apr, 2015
Downloads: 242

Rating

Votes: 3
Crackme is good.

Rate this crackme:

Solutions

Solution by Matteo, published 11. may, 2015; download (191 kb), password: crackmes.de or browse.

Matteo has rated this crackme as quite nice.

Solution by downabc, published 11. may, 2015; download (32 kb), password: crackmes.de or browse.

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Discussion and comments

halsten 23. Apr 2015	Cool tricks Kirjava. :)
Matteo 26. Apr 2015	Solved :) and yes there are nice tricks!! you should try it now i need to keygen and make tut
downabc 27. Apr 2015	Hi Kirjava, i wondered, did write the calculation of sum in asm? i found it kinda hard to write in c.
Kirjava Author 27. Apr 2015	Yes it was written in asm. Quite a lot of this crackme was done in inline asm.
Matteo 01. May 2015	solution sent now, i have made a very well written solution (IMHO) I have spent some time to document all the program :) Hope you like it
Silvershaft 06. Jul 2015	I did this but "wrong" way I guess because I just found the solution that works regardless of the username inputted. This is one my first keygenmes so I am quite happy with that too.
acruel 05. Sep 2015	username: acruel key: ROGALJBIJHEBCGMZ Cool! Keygen implemented with Python.
acruel 05. Sep 2015	http://pastebin.com/r9zM9sME
beaver 01. Oct, 05:46	KGME was written on asm. And author is familiar with assembler. Acruel, thanks for tip.

Kirjava's Morph

Download Morph.zip, 46 kb (password: crackmes.de)
Browse contents of Morph.zip

Hello!

This is my first crackme. The goal is simple:
Figure out my secret password.

Wrong passwords may result in expected crashes.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 19. Feb, 2014
Downloads: 257

Rating

Votes: 7
Crackme is quite nice.

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Solutions

Solution by bike, published 26. mar, 2014; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

demoth 20. Feb 2014	Thank you for this case! Very good crackme. :) I did it: 823705bb...(md5 of key) :) I don't have time to write a solution, but I'll do it later.
Kirjava Author 20. Feb 2014	Well done! You are one fast reverser! I guess I set the difficulty a bit too high or maybe you are just awesome. Probably both.
demoth 21. Feb 2014	Kirjava, the most difficult part is function 0xE71170 after that just break on 0xE71010 and see why fall. Total 3.5 hours. Some checks after "obfuscate" make analysis of 0xE71170 easier.
fine 01. Mar 2014	well,it handsome
adwi32 20. Mar 2014	its kinda hard. I guessed 1 byte of password only :D I know whats going on but i cant figure out how to guess the more letters. Looking forward for tutorial.
adwi32 29. Mar 2014	wow, good job bike. I had tunnel vision on the code morph function and tried to guess all letters only using this function. I havent even look deeply in "NOPE!" functions, I thought its non-important. Because why would it be? The program main flow just checks lenght, and last char of the password, and if thats ok, it goes to code morph function. So if thats non-valid, what is point of checking particular letters in "bad boy" function, its wrong anyway?

Kirjava's poof

Download poof.zip, 18 kb (password: crackmes.de)
Browse contents of poof.zip

Greetings!

My second crackme: poof!

The goal is to figure out a valid password. Bonus points for a keygen.

You are free to do whatever you please with the binary to achieve the goal.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 03. Apr, 2014
Downloads: 173

Rating

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Solutions

Solution by lilcw, published 15. apr, 2014; download (656 b), password: crackmes.de or browse.

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Solution by new_man, published 15. apr, 2014; download (214 kb), password: crackmes.de or browse.

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Discussion and comments

Kirjava Author 04. Apr 2014	Caution: This crackme will not operate correctly on windows XP. For best results, use windows 7.
Kirjava Author 07. Apr 2014	Another disclaimer, the crackme can't really be keygenned. If you find my hints it is quite simple to solve.
new_man 10. Apr 2014	well i can hack this program. ( you actually destroy the the whole DOS STRUCT and Code section nice job and build the IAT later btw there i found IsDebuggerPresent :-( and i also found another nice stuff the unpack strings like try again and well done and all api names and etc )
new_man 13. Apr 2014	i write solution later
lilcw 14. Apr 2014	i like your idea of checking for breakpoints =] you could use popfd to check for tf too ;] guess lots of ppl 'd like a keygen for this kind of check lol

kiTo's Aboo Me

Download abooMe.zip, 66 kb (password: crackmes.de)
Browse contents of abooMe.zip

Keygen this and submit your solution to crackmes.de

Have phun...

- kiTo / SCA
- http://sca.crk.se (for swedish crackers :)
- kito.leet <A T> gmail.com

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 17. Sep, 2005
Downloads: 1636

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by deroko, published 17. sep, 2005; download (31 kb), password: crackmes.de or browse.

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Solution by m@rio_crk, published 17. sep, 2005; download (63 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

neverdas 17. Sep 2005	Good Work! now make a keygen!
c_07 10. Jun 2006	Fun... this is the first program that I've keygened successfully... thanx! (Hopefully I will be writing a tutorial soon.)
c_07 10. Jun 2006	Oh, I just realized that I can't submit a tutorial at all. :-\
starzboy 13. Jun 2006	can someone please explain how to keygen this ! got serial cant keygen !
Ox87k 13. Jun 2006	starzboy, have u read the solutions? :)
IXORI 09. Apr 2014	I see that you're not allowed to upload solutions anymore which is a shame. Anyway, I have got two sources which I could pastebin/privatepaste and just put here. I hope the moderating team is fine with it. PHP - Outrage IRC Bot : http://pastebin.com/FdSBtppt C++ : http://pastebin.com/rPMR5fhX
IXORI 09. Apr 2014	Fixed a few bugs. Just make sure to enter a name between the 4 and 14 characters. You should be alright then. :)

kiTo's kiTo KGNmeAGAiN

Download kiToKGNmeAGAiN.zip, 106 kb (password: crackmes.de)
Browse contents of kiToKGNmeAGAiN.zip

Keygen this little baby and submit your solution.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 06. Aug, 2006
Downloads: 1732

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by crackerlnn, published 11. aug, 2006; download (101 kb), password: crackmes.de or browse.

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Solution by LAS3R, published 11. aug, 2006; download (14 kb), password: crackmes.de or browse.

LAS3R has rated this crackme as quite nice.

Solution by HMX0101, published 20. aug, 2006; download (28 kb), password: crackmes.de or browse.

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Solution by cyclops, published 11. aug, 2006; download (18 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 06. Aug 2006	very good keygenme =) i solved it, maybe i'll write a little solution..
HMX0101 06. Aug 2006	Me too, its a nice one :)
Ox87k 08. Aug 2006	Here is my keygen (only exe obviously) ht*p://rapidshare.de/files/28578586/kgn.zip.html Btw, i've some problems to generate the key. Have u modify the b64 routine? I don't know because in serial routine my b64 works perfectly but in key routine i obtain another key. Here my key generated by ur kGnMe: NTE0MDA4MjhOVEUwTURBNE== Here my key generated by my keygen: NTE0MDA4MjhOVEUwTURBNA== Very strange!
cyclops Moderator 08. Aug 2006	I have also coded a keygen and submitting here.....
Ox87k 08. Aug 2006	cyclops, have u included in ur keygen the key's routine or, like me, the users should copy and paste the key from crackme to keygen?
HMX0101 08. Aug 2006	The Base64 is modified because that's different ;) @Ox87k: My key is the same ;)
Ox87k 08. Aug 2006	are u sure that b64 is modified? In algo's routine it's normal.
boonz 08. Aug 2006	i have one question: how did you get that fast, that it's base64?
Ox87k 08. Aug 2006	Peid -> Kanal ANALyzer plugin :) btw, it's easy to discover which crypto-stuff is/are used if u have a little experience with this stuff ;)
boonz 08. Aug 2006	doh, thx m8, powerful tool :O oh and yes i'm quite a newbie to this
kiTo Author 08. Aug 2006	- Have u modify the b64 routine? No :)
l0calh0st 08. Aug 2006	Nice one...Easy but good for people starting crypto like me :P
cyclops Moderator 09. Aug 2006	Hmm...The user must copy paste the key. The crackme is providing us with this info...So i didnt code that.....
HMX0101 09. Aug 2006	I going to write a solution for this...
l0calh0st 09. Aug 2006	It's easier to code the key....Just based on windows version
l0calh0st 09. Aug 2006	here is my keygen http://l0calh0st.byethost16.com/files/crackmes/kito_KGMEe_Keygen.rar I don't think it will be necessary to write solution as Ox87k and HMX101 are going to write :)
LAS3R 09. Aug 2006	Nice and easy first time crackme, excellent job! btw first time i see swedish text in crackme ;)
Ox87k 09. Aug 2006	l0calh0st, write it ;) i haven't s0me times in these last days..
HMX0101 09. Aug 2006	l0calh0st, i have submitted my solution some time ago... but i want to see how do you solve this little babe ;) Ox87k, me too :) but i'm trying to do the possible for my hobby :D
cyclops Moderator 11. Aug 2006	I have also submitted the keygen some times ago.....may be we have to give some time to mods.... Great work kiTo,0x87k,HMX0101,l0calh0st.....
unicorn 19. Aug 2006	crackerInns solution file is damaged.mods plz check...
zairon Moderator 19. Aug 2006	The file is not damaged, I can open the archive without any problem.
Ox87k 19. Aug 2006	@unicorn: try to save and extract the archive in ur desktop (or where u want) and don't open it directly to the site ;)
l0calh0st 19. Aug 2006	Sometimes it may happen zip made in Winzip doesn't open in Winrar and vice versa
iLych 30. Aug 2006	Yeah! I've done it! http://rapidshare.de/files/31365599/kg_to_kiTo_KGNme_AGAiN.exe 4011d0-function is very very strange :S . Very big and very monotonous. No need to think. I'm going to check out how others did it. In any case it's my second keygen and so I'm very happy! =)
AlexeyG 31. Aug 2006	Very nice keygenme indeed. This is the 1st one I solved, wich has crypto functions used in it. I did recognise base64, but not MD5 Kanal Analyzer told me about. Here is my keygen with some sources (C for keygen and Delphi for a small tool I used to rip off the long boring function): http://alexeyg.denduvel.nl/solutions/kiToKGNmeAGAiN_sol_Alex.zip

KiToo's KeyGen Me 1

Download KGNME-1-KiTo.zip, 118 kb (password: crackmes.de)
Browse contents of KGNME-1-KiTo.zip

Just keygen it.. should be pretty easy.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 02. Dec, 2004
Downloads: 2253

Rating

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Solutions

Solution by Immortal_One, published 27. aug, 2005; download (203 kb), password: crackmes.de or browse.

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Solution by REA-CrAcKeRtEaM, published 06. dec, 2004; download (61 kb), password: crackmes.de or browse.

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Solution by _HellDashX_, published 04. dec, 2004; download (58 kb), password: crackmes.de or browse.

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Solution by nivel, published 04. dec, 2004; download (47 kb), password: crackmes.de or browse.

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Solution by haggar, published 04. dec, 2004; download (55 kb), password: crackmes.de or browse.

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Solution by scarabee, published 03. dec, 2004; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

evaboy 15. Aug 2015	A good one to start with by noobs

KiToo's KGNME2-KiTo

Download KGNME2-KiTo.zip, 16 kb (password: crackmes.de)
Browse contents of KGNME2-KiTo.zip

well, here is my KGNME-2 .. now it have an GUI...

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 14. Dec, 2004
Downloads: 1314

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by pulse, published 21. dec, 2004; download (33 kb), password: crackmes.de or browse.

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Solution by REA-CrAcKeRtEaM, published 17. dec, 2004; download (61 kb), password: crackmes.de or browse.

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Discussion and comments

SimpleData 05. Feb 2010	Thank you. It is a good crackme. I learned a lot about IDA while solving the algorithm. :)
DJ1hAD0 01. Oct 2013	It was cool:) Thanks!

KiToo's KillNag

Download KillNag.zip, 12 kb (password: crackmes.de)
Browse contents of KillNag.zip

2 nags to kill..

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 14. Dec, 2004
Downloads: 1698

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Solutions

Solution by [FiS], published 22. dec, 2004; download (63 kb), password: crackmes.de or browse.

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Solution by Cthulhu, published 17. dec, 2004; download (929 b), password: crackmes.de or browse.

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Solution by _HellDashX_, published 17. dec, 2004; download (13 kb), password: crackmes.de or browse.

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Solution by patrickh, published 17. dec, 2004; download (14 kb), password: crackmes.de or browse.

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Solution by REA-CrAcKeRtEaM, published 17. dec, 2004; download (14 kb), password: crackmes.de or browse.

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Discussion and comments

KKR_WE_RULE's AfterBurner

Download AFTERBURNER.zip, 249 kb (password: crackmes.de)
Browse contents of AFTERBURNER.zip

Time for my AfterBurner ..YEAH!!

Okie.. Rules asways : Keygen is the only soln.
No Patching, bruting etc :)
Level : 4.

This one will make you think .. I hope :p

Anyway.. Have a gr8 time reversing :)

Regards
KKR

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 21. Dec, 2010
Downloads: 464

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by tamaroth, published 09. jan, 2011; download (591 kb), password: crackmes.de or browse.

tamaroth has rated this crackme as awesome.

Solution by Diabolito, published 09. jan, 2011; download (2392 kb), password: crackmes.de or browse.

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Discussion and comments

3ton 21. Dec 2010	error: Invalid floating point operation
KKR_WE_RULE Author 21. Dec 2010	heh.. whats ya input ?
3ton 21. Dec 2010	Error at start crackme. OS Windows xp sp3
KKR_WE_RULE Author 21. Dec 2010	No idea.. I have Windows 7. Runs perfectly. Some1 else with WinXp .. please run & report back :)
KKR_WE_RULE Author 21. Dec 2010	Fixed version upped. Please try now 3ton & report back :)
3ton 22. Dec 2010	Thanks, all work
KKR_WE_RULE Author 22. Dec 2010	OKie.. Now crack it up :D
EvOlUtIoN 22. Dec 2010	on windows xp sp3 is running perfect here.
KKR_WE_RULE Author 29. Dec 2010	hmm .. Any progress.. any 1 ? :D
Xspider 31. Dec 2010	someone told me :p
apuromafo 01. Jan 2011	md5/crc/ convertion ..maybe is more easy patch 1 byte..but studing.. Apuromafo tuts4you/
KKR_WE_RULE Author 01. Jan 2011	Its definitely easy to patch. But to gen, ya need to think.. & thats the real challenge :)
tamaroth Moderator 03. Jan 2011	Quite interesting scheme, haven't seen it before and cannot google it so easily. But i'm trying to find out what is it!
KKR_WE_RULE Author 03. Jan 2011	Hehe :D Glad that ya didn't see the posted hint which I timely removed :p Keep working :) Ya will find it for sure :) & no hints here plz :)
tamaroth Moderator 03. Jan 2011	Was the lack of reduction modulo v on purpose? because for my chosen r, resulting H was bigger than v and thus i had to reduce it modulo v. and because of that after the check my serial was compared with the value before modulo v reduction. am i doing something wrong or there's unintentional bug?
tamaroth Moderator 03. Jan 2011	err, sorry for spam, using Schneier's notation, just in case :D
tamaroth Moderator 03. Jan 2011	ok, scratch that. I've done some tests, and despite what mr. Schneier said, we don't have to reduce it modulo v. and it indeed works: name: tamaroth serial: GQYTCNJWGY2TQNRVGY3TCMRYGQZDSLJRGI4DSMRXGY3TSMRUGE2DSNRRGM4TCMRTGU4TSMRQGY4Q==== Tuto as soon as i write a keygen and i'm sure my math is infallible ;-)
KKR_WE_RULE Author 03. Jan 2011	Good work :) So ya know the scheme ? If ya did it without knowing the scheme, ya deserve even more credit :) Great work mate :) Real good job :)
tamaroth Moderator 03. Jan 2011	Yeah, i found it in Schneier's book Applied Cryptography :)
KKR_WE_RULE Author 03. Jan 2011	Cool :) That book is a gold mine :) I have it too :)
Diabolito 05. Jan 2011	Awesome genme KKR looking forward to your next one
KKR_WE_RULE Author 05. Jan 2011	Glad that ya liked it :) Looking forward to seeing solns :)
tamaroth Moderator 05. Jan 2011	Solution submitted, hope you'll like it ;-)
KKR_WE_RULE Author 05. Jan 2011	cool :) looking forward to it :)
KKR_WE_RULE Author 09. Jan 2011	Good Work both of you. You get my respect :)
apuromafo 28. Mar 2012	bro, a friend was do a tutorial and keygen , only spanish version, but is understable too ^^ http://www.ricardonarvaja.info/WEB/CONCURSOS%202012/CONCURSO%202/CLS_02_12_AfterBurner_KeyGen_by_%20asOlOt.rar

KKR_WE_RULE's ASM_KeyGen Me - 1

Download ASM_KeygenMe1.zip, 3 kb (password: crackmes.de)
Browse contents of ASM_KeygenMe1.zip

Another KeygenMe By Me !!
My First one in ASM :)
I am soo happy :)

All thanx to qpt^J for guiding me with ASM :)

I dedicate this KeyGen Me to qpt^J :)

Now, As usual , Keygen is the Only Soln.
Ya can phish serials with pen 'n' paper,
but Keygenning it is the real challenge :)

I Rate it at difficulty 4.
The algo is very newbie like as you can expect is a '1st' ASM Keygen, but the check
is bit complicated :)

Best Of Luck Guyz..

Best Regards
KKR

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 23. Sep, 2010
Downloads: 444

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by VESA, published 08. oct, 2010; download (27 kb), password: crackmes.de or browse.

VESA has rated this crackme as quite nice.

Solution by Voik, published 07. oct, 2010; download (13 kb), password: crackmes.de or browse.

Voik has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

KKR_WE_RULE Author 23. Sep 2010	Just one more thing.. Dont Bruteforce :)
redoC 23. Sep 2010	messy code, serial is almost always 0-0-0-0, upload new version
qpt^J 23. Sep 2010	easy, but nice for first one in asm sorry mate, but im not going to write a solution, maybe next time i pm'ed you my keygen's src, hope that's enough
KKR_WE_RULE Author 23. Sep 2010	Yup.. qpt.. Works like a charm :) @ redoc : Serial cant be 0-0-0-0. check properly :)
redoC 23. Sep 2010	KKR_WE_RULE: 0-0-0-0 OK redoC: 0-0-0-0 OK Win XP SP3, AMD Athlon 64 X2
Voik 23. Sep 2010	I'm having problems with the keygen of user "Test". a² + b² + c² + d² = 192 Solution exists only with integers?
Xspider 23. Sep 2010	this is a good beggening for the 1st asming :)
KKR_WE_RULE Author 24. Sep 2010	@Voik : 8 - 8 - 8 - 0 @Coder : Certain names have 0 as serial but not all. @XSP!D3R : Thx man :)
Voik 24. Sep 2010	Keygen and Solution sended. ;) Nice crackme.
KKR_WE_RULE Author 24. Sep 2010	Cool :) Will be waiting 4 it :)
VESA 27. Sep 2010	@KKR_WE_RULE: Why you thought some one will try to brute force this?! and u could use GetDlgItemInt instead GetDlgItemText & StrToInt also allot a variable to name's len and use GetDlgItemText to get the length is much better than using strlen many times! Anyway I'll upload my solution soon.
KKR_WE_RULE Author 27. Sep 2010	Many ppl brute things if not mentioned :p I am new to asm buddy. Thx for the tip :)
VESA 27. Sep 2010	Yeah u right :) Solution + Keygen uploaded.
KKR_WE_RULE Author 28. Sep 2010	Congratz :) qpt^J told me abt ya :)
VESA 28. Sep 2010	Voik, check this: http://www.wolframalpha.com/input/?i=a^2+%2B+b^2+%2B+c^2+%2B+d^2+%3D+192 btw im waiting for your solution, interested to see your way :)
Voik 28. Sep 2010	i liked this site, VESA. :)
Xspider 29. Sep 2010	this is a nice website thx VESA :)
VESA 30. Sep 2010	np mate yeah really useful website for solving math algorithms :)
KKR_WE_RULE Author 07. Oct 2010	Good one Voik :)

KKR_WE_RULE's ASM KeyGen ME - 2

Download KeygenMe2.zip, 2 kb (password: crackmes.de)
Browse contents of KeygenMe2.zip

This is my second ASM challenge :)

I think, its better than my 1st asm challenge :)

This is very much easy & if you use your brain a lil bit, every one can solve it :D

Waiting for lots of solns :)

Rules :
Keygen is the only soln as always :D

Regards
KKR

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 10. Oct, 2010
Downloads: 502

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by Diabolito, published 22. oct, 2010; download (28 kb), password: crackmes.de or browse.

Diabolito has rated this crackme as quite nice.

Solution by josh, published 22. oct, 2010; download (68 kb), password: crackmes.de or browse.

josh has rated this crackme as nothing special.

Solution by Vallani, published 22. oct, 2010; download (5 kb), password: crackmes.de or browse.

Vallani has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

dknutson 10. Oct 2010	Im not sure if this is a bug, Im very new to this, but there is no "Wrong pass" or "Right pass" alert when the username is under 4 chars.
KKR_WE_RULE Author 11. Oct 2010	its not a bug.. Its intentional :)
josh 11. Oct 2010	Hi KKR_WE_RULE, With respect to your software, there are names which result in a very simple keys: I tried (as a german) "Mein Name ist Hasen" This results, e.g. in a key of 5-7. Even more, if I try "Mein Name ist Hase", your compare value yields 0 (and my keygen (currently being reviewed) fails. Intended behaviour? Regards, -josh
KKR_WE_RULE Author 11. Oct 2010	I tried to implemention of a Conjecture. If ya know whats happening inside kgm, ya should know which conjecture is it :) Not all names have serial .. I suppose :)
josh 11. Oct 2010	Yes, I think I know which reject condition you mean. And with respect of not all names having a serial - never mind, perhaps would have been worth to leave a note in the challenges' description. -josh
KKR_WE_RULE Author 11. Oct 2010	Sorry for inconvenience josh :( I am a beginnner in asm. I am sure that I was able to implement the Conjecture perfectly, but probably the checksum is bit buggy :( Sry for that :(
BondCracked 11. Oct 2010	The key for "Mein Name ist Hasen" = 11-1
BondCracked 11. Oct 2010	There is more than one valid key for a name.
josh 11. Oct 2010	@BondCracked You mean "Another key for "Mein Name ist Hasen" = 11-1", because, as you state correctly, there are many keys for one name. Therefore, I gave my key of 5-7 as "e.g". -josh
BondCracked 11. Oct 2010	Yes, Josh, you're right. Did you coded a keygen?
josh 11. Oct 2010	Yes, I submitted it as binary. Source is available too, if necessary. Did you?
BondCracked 11. Oct 2010	Yes, I did too, but my English is not strong enough to write a tutorial. I'm waiting to read yours.
Killswitch 17. Oct 2010	submitted solution
KKR_WE_RULE Author 21. Oct 2010	Cool... Guys... Waiting to see ya soln :D
KKR_WE_RULE Author 23. Oct 2010	Good Work guys :)

KKR_WE_RULE's Beat The Protection

Download KeyGenMe.zip, 236 kb (password: crackmes.de)
Browse contents of KeyGenMe.zip

This one is a level 5 challenge :D
Beat the protection :D

Required Soln : Keygen
Patching, Bruteforcing is forbidden as always :D

Note :
The algo is completely reversible :)

Have a great day :) & Happy reversing :)

Regards
KKR

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 19. Nov, 2010
Downloads: 436

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Solutions

Solution by tamaroth, published 27. nov, 2010; download (659 kb), password: crackmes.de or browse.

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Discussion and comments

redoC 04. Nov 2010	Contains virus Win32/Induc ... ?
KKR_WE_RULE Author 19. Nov 2010	Clean Version upped :) Get cracking :)
tamaroth Moderator 21. Nov 2010	Quite fun, found some ways to basically bypass some of the protection :P Name: tamaroth serial: 40ABDB3B6D3FB3E3EB57C9B3647F2BD2-343154934174747C25132565D44B9597 activation: 1234567890-1234567890 Machine ID doesn't realy matter ;p name: KKR_WE_RULE serial: 40ABDB3B6D3FB3E3EB57C9B3647F2BD2-3B699F4C8B35AA033599A64D63891FC6 activation as above Hopefully i'll find some time to describe what's been done here to bypass dlp etc :)
KKR_WE_RULE Author 22. Nov 2010	Hmm.. Interesting.. Bypass the dlp !! Will be waiting for your soln buddy :) You have really pwnd me !:D
tamaroth Moderator 23. Nov 2010	Solution submitted, hopefully it'll be accepted sometime soon.
KKR_WE_RULE Author 23. Nov 2010	Good Work buddy :D Looking forward to seeing ya soln :)
Coderess 24. Nov 2010	tamaroth Why do not use demangler in IDA it can make screens more beautiful and clear :)
KKR_WE_RULE Author 24. Nov 2010	Well...well...well. Awesome soln.. i must say :) Brilliant :) Congratz tamaroth :)
KKR_WE_RULE Author 24. Nov 2010	btw, ya keygen produces bad serials for some names.. But it works for most :) This challenge stands solved :) @Encrypto : Still waiting 4 ya soln :)
tamaroth Moderator 24. Nov 2010	show me some examples, i have a vague idea what might be wrong, but need to check it out ;p
KKR_WE_RULE Author 24. Nov 2010	Well , Name : KKR_WE_RULE : gives 40ABDB3B6D3FB3E3EB57C9B3647F2BD2-30580803A455CAB63CD9512C6123E67E this 1 doesn't work :) Name : crackmesde gives 40ABDB3B6D3FB3E3EB57C9B3647F2BD2-10DD39C71114F82D3D57D1A4439CC50C this didn't work either :) Name : RedCrew gives 40ABDB3B6D3FB3E3EB57C9B3647F2BD2-3BC707298B322B40D03377D1B80D61AB This didn't work too :) Name : Babi gives 40ABDB3B6D3FB3E3EB57C9B3647F2BD2-4DA78CE3FD9E641402E0F294CFEF19D1 this 1 works :) regards KKR
tamaroth Moderator 24. Nov 2010	Hey, i know what's wrong. By simple mistake I've put "older" keygen into the package, there's also small problem with miracl lib in my source code (just found out). But the source code works, when i recompiled it again just now, for your names i got proper values, which are: (treaet names without "") name: "KKR_WE_RULE" serial: 40ABDB3B6D3FB3E3EB57C9B3647F2BD2-3B699F4C8B35AA033599A64D63891FC6 name: "crackmesde" serial: 40ABDB3B6D3FB3E3EB57C9B3647F2BD2-48265DF21220BDD302B6BDE79D04FFAB name: "RedCrew" serial: 40ABDB3B6D3FB3E3EB57C9B3647F2BD2-7D23CFF9F2088EA26401D55CCB265F43 The problem in older version was that i passed crc32 as a dword to convert (miracl function), and sadly enough convert takes parameters as int, not unsigned int, so when crc32 was bigger that 7FFFFFFF, it was considered a negative number. Source code has a way around it though (converts uint to a string and then cinstr from string to big). I'll update the keygen (and source) in a while.
KKR_WE_RULE Author 24. Nov 2010	alright :) No problem :) Well done :)
Encrypto 26. Nov 2010	Hello KKR: I am currently writing up the solution :). @tamaroth: brilliant solution. absolutely well spotted!
Xspider 26. Nov 2010	hi encrypto wasup :D where is tamaroth's solution O_o
KKR_WE_RULE Author 26. Nov 2010	There was a bug in his keygen. He'll upload the fixed one soon :D Looking forward to your soln tCm! :)
tamaroth Moderator 26. Nov 2010	My solution is currently reviewed by moderators, i uploaded new version due to a bug in my keygen which caused sone names generating wrong serials, should be available soon :)
Xspider 27. Nov 2010	okey then :) mods are a lill bit lazy :p
KKR_WE_RULE Author 28. Nov 2010	Allright :) This 1 works like a charm :) Good Work Man :)

KKR_WE_RULE's CrYpTo Challenge

Download CrYpTo_Challenge.zip, 274 kb (password: crackmes.de)
Browse contents of CrYpTo_Challenge.zip

Hello guys .. I am back with another kgm..

For details on rules, chk the readme inside :)

Best of luck to all :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 02. Jun, 2010
Downloads: 611

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Solutions

Solution by qpt^J, published 15. jun, 2010; download (337 kb), password: crackmes.de or browse.

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Discussion and comments

qpt^J 05. Jun 2010	Very nice keygenme!!! I enjoyed solving it :) thanks m8
KKR_WE_RULE Author 06. Jun 2010	My pleasure mate :)
buganxin 09. Jun 2010	anyone solving it?
KKR_WE_RULE Author 09. Jun 2010	Here is the private key : 92346234533863644888207450699592605250636534195
KKR_WE_RULE Author 16. Jun 2010	Good Work mate :) Sorry 4 da late reply.. I was not well .. suffering from intense heat here :(
qpt^J 16. Jun 2010	oh, i wish you health hope, soon you will go back
KKR_WE_RULE Author 16. Jun 2010	I'll try mate.. Thx a bunch :)

KKR_WE_RULE's Kgm#1

Download Kgm#1.zip, 24 kb (password: crackmes.de)
Browse contents of Kgm#1.zip

Hello guys.. I had 45 mins to kill, and I was going down memory lane visiting this website.
I decided to write something, again! :D

But due to shortage of time, dont expect much from the challenge, as it's simple, no crypto in this!

Big guys won't even like the kgm, but yeah, the little guys starting reversing will have fun I think :)

Goal is to write a keygen. Patching is forbidden as always!

Merry Christmas and a Happy New Year to all who mane this site :)

have Fun!

KKR//2015

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 20. Jan, 2016
Downloads: 151

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Solutions

Solution by iSSoGoo, published 09. feb, 2016; download (358 kb), password: crackmes.de or browse.

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Solution by acruel, published 09. feb, 2016; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

geminivi 22. Jan, 06:22	I'm so confused as to where the memory at 00403304 is being written from... my hardware breakpoints aren't stopping when that memory is being written.
Tnavarro 22. Jan, 22:40	Look at 401234: MOV DWORD PTR [ECX+0403304h],EBX
acruel 23. Jan, 05:06	Linear system of equations? Elementary mathematics!
KKR_WE_RULE Author 17. Feb, 03:19	Good Work guys! :)

KKR_WE_RULE's KGM #2

Download KGM2.zip, 275 kb (password: crackmes.de)
Browse contents of KGM2.zip

Dont get schocked by KGM '#2' :p
Where is is the '#1' ??

Well, i almost forgot about this site..
My no 1 had a bug in it..

Hence lets start from no 2.. :)
Goal :- Stand-Alone keygen.
No patching.
no brute forcing :)

No sharing of hints here :)

Best of luck :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 09. Mar, 2010
Downloads: 447

Rating

Votes: 3
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Solutions

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Discussion and comments

KernelJ 09. Mar 2010	Freezes checking name with empty serial + activation
KKR_WE_RULE Author 09. Mar 2010	It does take a bit of time for longer names, but if ya leave the Name, serial, activation blank it gives out an access-violation. It doesn't freeze . :)
TQN 10. Mar 2010	Delphi 2009, ElGamal and FGInt. I am solving.
KKR_WE_RULE Author 10. Mar 2010	Best Of Luck Buddy
KKR_WE_RULE Author 26. Mar 2010	Hmm.. No Soln yet for this ?? Strange :p
Diabolito 16. Dec 2010	There is a bug in your GCD function that allows the return of an uninitialized variable. Would not be a problem but in your second checksum function you call Application.Processmessages which changes the values in the stack that will eventually be returned by your GCD function. In other words the checksum for a given name changes depending on what windows message the keygenme is processing. As of now I have a working keygen but I have to NOP the call to Application.Processmessages to get a constant checksum for a given name.

KKR_WE_RULE's KKR's SPiDER Keygen ME #2

Download KKR__s_SPiDER_KeYgEnMe_#2.zip, 293 kb (password: crackmes.de)
Browse contents of KKR__s_SPiDER_KeYgEnMe_#2.zip

Here is a relatively tough keygen me ..
For further details read the read me inside :)

Is it really level 5 ..
Hmm its abt 4.5 to 5 :)

Best of luck guys :)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 08. Apr, 2010
Downloads: 458

Rating

Votes: 3
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Solutions

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Discussion and comments

Numernia Moderator 17. Apr 2010	fun and nice keygenme, good for beginners, however a bit overated in difficulty. thankyou kkr
KKR_WE_RULE Author 17. Apr 2010	Sorry, if the difficulty level is misleading, plz set it to appropriate level. Good 2 hear ya liked the kgm :)
redoC 06. Oct 2012	http://forum.tuts4you.com/topic/22666-keygen-me-kkrs-spider/ KKR_WE_RULE: ... solved or not?

KKR_WE_RULE's KKR's VoLtAgE Keygenme

Download KKR__s_VoLtAgE_Keygenme.zip, 255 kb (password: crackmes.de)
Browse contents of KKR__s_VoLtAgE_Keygenme.zip

Ok guys.. Another crypto keygen me from me :)
For details read the readme inside :)

Best of Luck :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 22. Apr, 2010
Downloads: 549

Rating

Votes: 5
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Solutions

Solution by Numernia, published 26. apr, 2010; download (112 kb), password: crackmes.de or browse.

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Discussion and comments

_ghandi_ 23. Apr 2010	--------------------------- Voltage_kgm --------------------------- Access violation at address 004597B9 in module 'VoLtAgE_KGM.exe'. Read of address 00000000. --------------------------- OK --------------------------- May i ask, is the non-catching of exceptions when an incorrect serial is entered an intentional thing? HR, Ghandi
KKR_WE_RULE Author 23. Apr 2010	Hmm.. It doesn't show any access-violation to me.. What was ya input when it showed ya the accessviolation ?
Numernia Moderator 23. Apr 2010	exception? the crackme works good for me. Solved more or less, but the elliptic curve was unnecessary large ^^
_ghandi_ 24. Apr 2010	This was the input to get that exception: Username: Anything Serial: 12345678+12345678
KKR_WE_RULE Author 25. Apr 2010	yea.. It throws out an exception.. But its due to the length of the serial, as the forloop goes beyind the slen & lands in a barren land :p Its not a bug :) The kgm is pretty ok :)
Xspider 26. Apr 2010	thank you numernia for the solution :)
KKR_WE_RULE Author 29. Apr 2010	Welldone numernia.. It was too easy 4 ya :) :p

KKR_WE_RULE's RED CReW KGM#1 By KKR

Download KKR_RED_KGM_#1.zip, 388 kb (password: crackmes.de)
Browse contents of KKR_RED_KGM_#1.zip

This is my keygenme for RED CReW.
As its a keygen me, thought why not share it with every body :)

For rules , read the README inside.

Is this really level 2 ?
ans : Well I thin its abt 1.5 but that option isn't there :p
Its certainly not below 1.5 :)

BEST OF LUCK :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 24. Mar, 2010
Downloads: 684

Rating

Votes: 4
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Solutions

Solution by redoC, published 11. aug, 2012; download (434 kb), password: crackmes.de or browse.

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Discussion and comments

redoC 25. Mar 2012	Crackme contains bug when reading one character before string start. It should be patched from: 00475122 MOVZX EAX,WORD PTR DS:[EAX+EBX2-2] To: 00475122 MOVZX EAX,WORD PTR DS:[EAX+EBX2] 00475126 NOP Anyway algo seems to be impossible to reverse. Have you functional keygen for this?
redoC 30. Mar 2012	I can provide algo - C source code if someone is interesting in it. Send me PM.
redoC 28. Jul 2012	KKR_WE_RULE: do you have functional keygen for this?

KKR_WE_RULE's SHoRTCuT

Download ShortCut.zip, 254 kb (password: crackmes.de)
Browse contents of ShortCut.zip

This is just for fun..
Enjoy guys..

RULES : NO PATCHING, BRUTING.
KEYGEN + A WELL EXPLAINED TUT IS A VALID SOLN :)

For more info chk the readme inside.

Regards\KKR

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 10. May, 2010
Downloads: 554

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Solutions

Solution by Saduff, published 21. may, 2010; download (120 kb), password: crackmes.de or browse.

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Discussion and comments

Saduff 21. May 2010	Interesting KeygenMe. Thanks, I liked it. :) Submitted my solution.
KKR_WE_RULE Author 21. May 2010	Well done.. I am glad that ya liked it :)

KKR_WE_RULE's SiDEWiNDER KeygenMe

Download SiDEWiNDER_KGM_KKR.zip, 263 kb (password: crackmes.de)
Browse contents of SiDEWiNDER_KGM_KKR.zip

SiDEWiNDER KEYGENME By KKR_WE_RULE

Difficulty : 3

Rules : Keygen is the only soln.

Protection : Quite Easy.. But Its your job to findout :p

Best Of Luck guyszz :)

Regards
KKR

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 25. Aug, 2010
Downloads: 1010

Rating

Votes: 5
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Discussion and comments

Xspider 26. Aug 2010	i like the music :D
Xspider 26. Aug 2010	btw i got an access violation err0r which comes from this call: 0045C831 \|. E8 CEB3FFFF CALL 00457C04 any idea why?!?!
KKR_WE_RULE Author 27. Aug 2010	What was the serial ya were using.. I dont have that kgm here in my laptop..but I am guessing a buffer overflow or some similar crap :p It works fine if the key is in right format :)
Xspider 27. Aug 2010	ouh i see :) i've used a fake one ^^
KKR_WE_RULE Author 27. Aug 2010	lol.. Ya serial was too fake for it to accept :p
Xspider 27. Aug 2010	ya it was 123456 :D
Xspider 28. Aug 2010	yep that's righ with the access violation i've teste with this serial "1234-67890-BCDEF" and and it didn't give any err0r :D
KKR_WE_RULE Author 28. Aug 2010	lol.. Now find a serial for which it shows goodboy message :)
TQN 29. Aug 2010	"BCDEF": Base10StringToFGInt will raise an exception. All serial chars must be decimal char.
Saduff 29. Aug 2010	TQN never said that it isn't gennable. He's right about all serial chars having to be decimal chars.
KKR_WE_RULE Author 29. Aug 2010	Lol.... I removed that post :p
Saduff 29. Aug 2010	@TQN and everyone else: It's very gennable. I've genned it. :)
SK2K7 14. Sep 2010	If you genned it, where is it ? (i did and i could send to proof it)
Saduff 15. Sep 2010	I don't have time to make a tut, which is why I can't post it as a solution here. Proof sent via PM.
KKR_WE_RULE Author 18. Sep 2010	Well, SerialKiller, He did gen it, & he sent his keygen to me & it works perfectly. @SerialKiller : If ya genned it too, post a soln with a tutorial.
SK2K7 18. Sep 2010	well, if u search crackmes.de i dont think u will find any solution from my side coze i never partecipate here, and i dont think i will start now to post tutorials here. 2) i can send my keygen to any mod here, coze i'm sure they wouldnt cheat !
KKR_WE_RULE Author 18. Sep 2010	"i can send my keygen to any mod here, coze i'm sure they wouldnt cheat !" Not quite sure what ya meant !
tamaroth Moderator 06. Jan 2011	got bored (quite fast hehe) so looked inside. compared to the rest you've made this one's pretty easy, didn't take me long to figure out what's what ;-) tamaroth 3085605197281410-3529195898137966-3284892055136300 but still. i learned some doing it (about Legendre symbol and polynomial mainly ;p)
KKR_WE_RULE Author 06. Jan 2011	Hehe.. I was bored too when I wrote it :) Just did some random stuff in this :p Still good work :)

KKR_WE_RULE's TERMiNATOR

Download TERMiNATOR.zip, 535 kb (password: crackmes.de)
Browse contents of TERMiNATOR.zip

Hello Guys !!
Its time to Rock'n'Roll :)

This is my new TERMiNATOR keygen me .

Rules are quite simple :-
Keygen + a well written tutorial is the only valid soln :)

Difficulty level : Moderate (4.5).

This is the smallest & simplest algo I've ever used :)
But I hope ya will find it interesting :)

Regards
KKR

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 07. Jul, 2010
Downloads: 772

Rating

Votes: 6
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Solutions

Solution by Encrypto, published 12. jul, 2010; download (327 kb), password: crackmes.de or browse.

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Discussion and comments

Encrypto 10. Jul 2010	nice crackme kkr, just saw the keygenme. will post solution soon :)
KKR_WE_RULE Author 10. Jul 2010	Ok.. Will wait for ya soln :)
Saduff 11. Jul 2010	Hey there, Encrypto. :) I already solved it and gave the keygen to kkr on tuts4you. But I had no time to make a tut and I'm not at home atm. Looking forward to your solution and tut. Always good to learn something new. :) I used a different approach on this KGM, effective, but takes quite a bit of time. Would like to see your tut. :)
Encrypto 12. Jul 2010	Hi Saduff, ive submitted my sol. I dont know if it will get approved. Quite badly written :D
KKR_WE_RULE Author 12. Jul 2010	It will get accepted no matter what :) Look who has written it :D
andrewl.us Moderator 12. Jul 2010	haha must see this keygen! I doubt KKR is dismayed...I'm sure that in no time, with a new crackme....he'll be back.
qpt^J 13. Jul 2010	I am going to see tut, because i couldn't discover what kind of cipher used kkr said, that only Encrypto found it well done Encrypto :)
KKR_WE_RULE Author 13. Jul 2010	LMAO.. Target terminated :) Well done tCm! :) & yea.. If i had used my own params it would have been better :) a LOT better :)
xylitol 15. Jul 2010	Haha awesome music Encrypto :) also thanks for the sol, i will look it.

KKR_WE_RULE's ViPER

Download Viper.zip, 311 kb (password: crackmes.de)
Browse contents of Viper.zip

A new Keygen me By Me :)
What to expect from this KeygenMe ?
Well, a bit stiff resistance.

I rate its difficuly to 4.

Soln is ONLY Keygen & a well written tutorial.
Donot share any hints :)

I suggest avoid 'CodeRipping' & 're-code' everything on your own :)

Regards
KKR

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 21. Sep, 2010
Downloads: 394

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Solutions

Solution by tamaroth, published 21. oct, 2010; download (719 kb), password: crackmes.de or browse.

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Discussion and comments

KKR_WE_RULE Author 07. Oct 2010	Hmm.. Any 1 trying this ?
tamaroth Moderator 14. Oct 2010	Yes, I am, just started though. So far i've figured out general idea, but it might take more time to keygen something due to delphi libraries used for this are slightly more complicated in understanding than just C/asm code.
KKR_WE_RULE Author 14. Oct 2010	Alright :) Best Of Luck :)
Xspider 14. Oct 2010	@tamaroth: with iDA it's easy to understand if you have the FGInt Signatures ;)
KKR_WE_RULE Author 14. Oct 2010	Hmm.. Spidy gen it :p Hope ya like the nick name :D
tamaroth Moderator 15. Oct 2010	Problem is, i don't really know how to create lib in delphi, so i created DLL instead, then reverted to lib and used flirt to create signatures, but sadly enough they didn't apply (i tried all versions i could create, debug, release, with and without optimization) So after all this trouble i managed to apply names manually (disassembled dll in one window, kgme in other) but there still can be errors. If any of you guys have the signatures that actually work, i'd appritiate any help ;-) ps. even idb2sig didn't work out as nicely as i hoped ;\
tamaroth Moderator 15. Oct 2010	Meh, nvm, found everything i needed, disregard my previous comment ;p
tamaroth Moderator 15. Oct 2010	First of all, sorry for spam. Second of all: tamaroth 785454680677618004680116580042212-478118638912932007742565220075723 Writing tut and kg as we speak (and then some beers!)
KKR_WE_RULE Author 15. Oct 2010	Cool Work :D Waiting 4 soln buddy :)
Xspider 15. Oct 2010	yep i like it kkr :p
KKR_WE_RULE Author 21. Oct 2010	Awesome tut buddy :) I am really impressed :) But unfortunately ya keygen aint running here :( Dunno for what reason though ? Does it require any runtime lib ?
tamaroth Moderator 22. Oct 2010	Blasts, must've forgotten to compile with lib. You got the source, you can recompile it again if you wish, I'll recompile my keygen and update the solution some time soon.
KKR_WE_RULE Author 22. Oct 2010	Ohh.. Its ok.. Thx :)

Klaria's Rosy

Download Rosy.zip, 6 kb (password: crackmes.de)
Browse contents of Rosy.zip

Hi, this is my first crackme... It's very easy, but has some antidbg tricks.
The solution is only a keygen. May be necessary to patch some parts in order to find the keygening.
Enjoy it!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 19. Nov, 2010
Downloads: 743

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Solutions

Solution by -Alex-, published 23. nov, 2010; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

-Alex- 20. Nov 2010	Alexander 221913100 Klaria 1172634816 crackmes.de 2672282368 No idea how to write tutorial, if u wish, i drop the keygen to u..
deurus 21. Nov 2010	Don't run in my xp sp3
-Alex- 22. Nov 2010	Had same prob, so I solved it in Win7 :P
hasherezade 23. Nov 2010	I solved it too ^^ hasherezade 4240040083
Klaria Author 26. Nov 2010	Good Job, -Alex-
-Alex- 27. Nov 2010	Thanks Klaria, hope to see more from you :)
superman32870 14. May 2012	Chris 4224592640 I used the calculator in Ida and it does not work for all conversions! Lesson learned the hard way.

KLiZMA's CrackMe#1 (Lucky)

Download Crackme#1_by_KLiZMA.zip, 3 kb (password: crackmes.de)
Browse contents of Crackme#1_by_KLiZMA.zip

Hey!

Rulz: 1. unpack it
2. find correct serial
3. write keygen
4. write tutorial

Have fun!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 04. Jan, 2006
Downloads: 1344

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Solutions

Solution by Ox87k, published 08. jan, 2006; download (47 kb), password: crackmes.de or browse.

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Solution by Ank83, published 08. jan, 2006; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

PiCkLeD 04. Jan 2006	Unpacked this boom Norton AV Pops Bloodhound.W32.EP Wtf?
astigmata 04. Jan 2006	maybe because it's packed with FSG FSG is used in order to pack worms and viriis like sasser or blaster but don't worry I unpacked too, but under olly, I found the good jump and I can't trace memory at adress 77C0537C is not readable :(
Ank83 04. Jan 2006	i unpacked it, found a valid serial, i will start writing a keygen ! unpacking is a little tricky !
astigmata 04. Jan 2006	I wait for your solution to see what I 've forgotten
astigmata 04. Jan 2006	olly was the problem for IAT importrec is better I didn't find serial I nopped the 004012E7 jmp but I'm lazy to reverse because Ank83 is doing a kg :P
HMX0101 04. Jan 2006	i'm writing a bruteforce, for get the serials
HMX0101 04. Jan 2006	if this is accepted
Zaphod 04. Jan 2006	I'm rather mystified by this crackme because when I loaded it in Olly, Olly found the real entry point by itself! I have the Ollyscript for FSG 2.0, but normally I have to start it myself, only this time it wasn't necesssary. Olly must be more intelligent than I thought... Well, then it was just a matter of scrolling a little bit down to find the serial calculations. I haven't written a keygen but it was easy to find 9 correct serials - perhaps there are no more...
KLiZMA Author 05. Jan 2006	It is FSG v2.0!!! Unpack it!!!
Ank83 05. Jan 2006	It is very nice crackme ! Simple algoritam, perfect for newbies !
Ank83 05. Jan 2006	hmx0101 dont write bruteforcer is endles combination of number that can be serials. Try looking into the code ! :)
Zaphod 05. Jan 2006	Yes, there are lots of correct serials, and I found out that you just have to look at the code from 40138D to 4013AF in the unpacked crackme to see what is going on.
HMX0101 05. Jan 2006	the serials like this "111111" is accepted by the crackme, maybe this is a bug
DeepBlue 05. Jan 2006	>> Norton AV Pops... Pls, do not trust Norton...
KLiZMA Author 06. Jan 2006	to HMX0101: 111111 is the correct serial Try to write the keygen and look to the code!
Ox87k 06. Jan 2006	klizma maybe i understand... the correct serials are all palindrome numbers? ex: 123321, 694496?? :D
Ox87k 06. Jan 2006	nope.. sorry! the sum of first 3 chars must be equal to the sum of the last 3 chars... so, not only palindrome numbers... ;)
Ox87k 06. Jan 2006	but this crackme accepted only numbers or also the chars? :\| the scanf get the serial in long double mode so i think that the ckm accepted only numbers but i don't see any check (if numbers or chars)!
KLiZMA Author 07. Jan 2006	to Ox87k: phanx! phanx! phanx!
outlaw 08. Jan 2006	Ð¯ Ð²Ð¾Ñ‚ Ð´ÑƒÐ¼Ð°ÑŽ, Ð° ÐµÑÑ‚ÑŒ Ñ‚ÑƒÑ‚ Ñ€ÑƒÑÑÐºÐ¸Ðµ ÐºÑ€ÑÐºÐµÑ€Ñ‹?
m@[tador] 09. Jan 2006	outlaw Ð´Ð°, ÐµÑÑ‚ÑŒ :-)
zairon Moderator 09. Jan 2006	No, only english language here.
KpocoboK 24. Feb 2006	OMG\|GMO Russian crackers inside!!
Rambo 24. Feb 2006	Rusian, Polish :)
Rambo 24. Feb 2006	This is cmp func... bool Spr(char* s) { int a,b; if (strlen(s)==6) { a=s[0]+s[1]+s[2]; b=s[3]+s[4]+s[5]; if (a==b) return true; } return false; } I hope it's correct ;). Creating keygen is simple.
Rapido 22. Feb 2009	in solution: "Trace realentry bitewise (very slow!)"<< whats it? i cant find "adress of entry"? help please iam newby
Rapido 23. Feb 2009	nobody answer to me??!!
DigitalAcid 23. Feb 2009	Aaaaaaw, you need attention =).
Rapido 23. Feb 2009	thanks for your help! you need attention!!

KLiZMA's CrackMe#2 (Math)

Download CrackMe#2_by_KLiZMA.zip, 3 kb (password: crackmes.de)
Browse contents of CrackMe#2_by_KLiZMA.zip

Hey!

Rulz: 1. unpack it
2. find 3 serials (enter ID like some integer)
3. make keygen
4. write tutorial
5. NO PATCHING!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 04. Jan, 2006
Downloads: 1308

Rating

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(we have only 1).

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Solutions

Solution by Ank83, published 07. jan, 2006; download (8 kb), password: crackmes.de or browse.

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Solution by Cyber_Punk_III, published 08. jan, 2006; download (8 kb), password: crackmes.de or browse.

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Solution by HMX0101, published 10. jan, 2006; download (36 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 04. Jan 2006	ollydump has some problem with iat and i don't understand what is this problem.. however importrec works! i unpack it, the 3 routine is very simple, so i hope to find some time for write a little tut+kgn! thanks for this crackme..
HMX0101 04. Jan 2006	i have ripped the code to make the keygen
HMX0101 04. Jan 2006	i can't rip the code of 2nd serial generation, i'm trying the old method
Geminias 05. Jan 2006	the tutorials i've read seem to launch right into the reversing. Can someone please explain step 1, as in, you get an executable crack me and nothing else. So you look at this box with a text field with a label beside it saying "enter password" what would be the first steps you would take? like don't you have to retrieve hashes from memory somewhere? or dont you have to brute it to see what kinds of serials it accepts?
KLiZMA Author 05. Jan 2006	Lots of thanx: Ox87k and HMX0101
Ank83 05. Jan 2006	i'm writing a keygen as the first one this is very nice crackme. Not so hard algoritams. If you understand the first cracme - it's almoust imposible not to solved this one ! Thanks Klizma for giving us target to practice ! Best Regards Ank83
Ox87k 05. Jan 2006	self-keygenning is allowed?? :)
HMX0101 05. Jan 2006	this is more easy than the first, i'm writing the keygen
Ank83 06. Jan 2006	hi i need help ! what function is in c++ or vb the IMUL in asm ! I have problems with generating the third serial !
m@[tador] 06. Jan 2006	Ank83: IMUL is signed multiplication. Maybe in C++ and VB is '*' operation?
KLiZMA Author 06. Jan 2006	Who can write the solution or keygen? Ha.
Ox87k 06. Jan 2006	i submitted my solution yesterday... i wrote a tutorial and i made a selfkeygen.. i hope that the moderators approve my solution! :)
fangrenxing 28. Apr, 04:04	이것이 나의 대답이다. s_sn1 = 3 * v_id1 / 2 + 330333; s_sn2 = (s_sn1 / 3 + 263524) / 2; s_sn3 = (s_sn2 + v_id1 + s_sn1) / 11;

KLiZMA's CrackMe #3 (Interval)

Download CrackMe#3_by_KLiZMA.zip, 3 kb (password: crackmes.de)
Browse contents of CrackMe#3_by_KLiZMA.zip

Hey!

KLiZMA wrote another crackme!
Run it and read rulz...
Solve it and make tutorial with keygen!
I know you can do it!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 15. Jan, 2006
Downloads: 1150

Rating

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Solutions

Solution by HMX0101, published 22. jan, 2006; download (28 kb), password: crackmes.de or browse.

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Solution by Ox87k, published 16. jan, 2006; download (53 kb), password: crackmes.de or browse.

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Solution by Kerberos, published 16. jan, 2006; download (47 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Ox87k 15. Jan 2006	i solve it... i understand all... but... I don't succeed to unpacking it!! I think it's so simple (unpacking part). However the unpacking isn't important for find the routine! Some help for unpacking plz?? :D Tnx klizma, is more funny to solve ur crackme :)
Ox87k 15. Jan 2006	yeah! i unpacking it :D lol! my mistake! tomorrow i'll write a solution! (sorry for double post!)
Kerberos 15. Jan 2006	Yep, unpacking isn't problem you can do it only with OllyDbg.
KLiZMA Author 16. Jan 2006	PHANX Ox87k and Kerberos!
Ank83 16. Jan 2006	god damn ! I didn't check the web page for one day and : The submission of solutions is closed. I took the crackme yesterday today on work I wrote the solution and keygen, but my boss came in, and I can't post it and I'm fu...d ! All that work for nothing ! I'm not so sorry for the keygen, but the I regret for writing the solution. Damn ! I must be faster next time !
fangrenxing 28. Apr, 04:03	이것이 나의 대답이다. s_sn1 = 3 * v_id1 / 2 + 330333; s_sn2 = (s_sn1 / 3 + 263524) / 2; s_sn3 = (s_sn2 + v_id1 + s_sn1) / 11;

KLiZMA's CrackMe #4 (Combo)

Download CrackMe_#4_by_KLiZMA.zip, 3 kb (password: crackmes.de)
Browse contents of CrackMe_#4_by_KLiZMA.zip

Hola!
KLiZMA made another crackme for you!
Algo combined from 1st, 2nd and 3rd crackmes.

Rulz:

1. unpack it
2. complete 3 stages with success
3. write tutorial and make keygen
4. no self-keygenning and 'all accept' patching

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 25. Jan, 2006
Downloads: 1407

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by Kerberos, published 03. feb, 2006; download (62 kb), password: crackmes.de or browse.

Kerberos has rated this crackme as nothing special.

Solution by Ox87k, published 16. feb, 2006; download (42 kb), password: crackmes.de or browse.

Ox87k has not rated this crackme yet.

Solution by HMX0101, published 22. feb, 2006; download (31 kb), password: crackmes.de or browse.

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Discussion and comments

Ank83 25. Jan 2006	Is it me or this crackme in the stage one take only numbers betwen 0 and 11 ?
Ank83 25. Jan 2006	Need help. What does SAR function do. SAR EAX, 0A ? If I have 100 004 in EAX it give me the value of 97. What does SAR do. Thanks Ank
thrall 25. Jan 2006	SAR is shift arithematic right. SAR EAX,0A means shift contents of EAX by A(10 decimal) bits to the right.
HMX0101 25. Jan 2006	some info: "SAR Shift Arithmetic Right; Intel 80x86; shifts the contents of a data register or memory location (8, 16, or 32 bits) to the right (towards least significant bit) by a specified amount (by 1, by 0 to 31 bits specified by an immediate operand, or by 0-31 bits specified by the contents of the CL register), with the low-order bit being shifted into the carry flag, the original high-order bit being replicated and shifted into the high-order bit; sets or clear flags" extracted from: http://www.osdata.com/topic/language/asm.htm
Ank83 25. Jan 2006	Thanks. I understand the algo of this crackme I wrote a tutorial, and I was thinking to write a keygen tomorow on work. But the problem is that on the machines on work we have only VB. And SAR is not implemenetd in VB. To write the function will need me more than 2 hours. :P Thanks to all ! KLiZMA nice work. Keep going ! I like the fact that in every new crackme you add something new.
HMX0101 26. Jan 2006	I think that Visual Basic can manage assembler
KLiZMA Author 26. Jan 2006	Phanx: Ank83 - questions HMX0101 - answers
HMX0101 26. Jan 2006	i'm working in the keygen
HMX0101 28. Jan 2006	yes, it is a bug because, if the ID is less than 0x1869F, close the crackme, and if the ID is greater than the 3rd serial close the crackme, but the autor says in the readme: "4. no self-keygenning and 'all accept' patching" Regards, HMX0101
KLiZMA Author 02. Feb 2006	DON'T BE STUPID! THERE IS NO BUGS IN THE CRACKME!!! TRY TO SOLVE IT AGAIN, TAKE PIECE OF SHEET AND SOME BRAIN... I HOPE THAT THE GOOD SOLUTION WILL BE POSTED!
Ank83 02. Feb 2006	Stage one: condition 1 for first entered values Stage two: condition 1 for new entered value Stage three: codition 1 for first entered values contition 2 for first entered values So this means you can pass the two levels, but in the third stage you have new condition for the before entered values. So when writting a keygen you must create values that valid for all conditions. I think that this is the problem that is confusing you. I cant write keygen becase all the language I know didn't implement SHR. I didn't know to program in ASM so well. Regard Ank83
CuTedEvil 02. Feb 2006	as KLiZMA (the author) said, the crackme is not bugged. It has been tested. guys, you have to analyze the crackme more carefully :)
Ox87k 02. Feb 2006	no no read with more attenction my posts: QUOTE: sorry, i was confused!!! delete my post plz, is not correct!! eheh, lol ^^' however... My solution, write some time ago, was rejected because my dumped file don'w go in other machine and i don't know. In my 2 pc it work perfectly. ZaiRoN said me that the call SetUnhandleExceptionFilter in his pc point in a another area and i don't understand because in my pc work. ImportRec don't show me one call sospect or invalid and the rebuild of iat is good. If u want a keygen+tutorial i'll re-send my solution and maybe will be accepted.
KLiZMA Author 03. Feb 2006	to Ox87k: BaD MessageS DeleteD !
CuTedEvil 03. Feb 2006	Ox87k, ur solution was invalid. as ZaiRoN told you, dumped file isn't valid. (on my machine too). Try to fix this, or find another way to correctly unpack. Ur solution should be accepted then :)
Ox87k 03. Feb 2006	yes cutedevil, my dumped crashed in all other machine but in my 2 pc work perfectly. Really, i don't understand how to make a valid dumped file... only 1 import is wrong... :(
KLiZMA Author 04. Feb 2006	to Kerberos: Pnanx! Very intelligent solution!
KLiZMA Author 16. Feb 2006	to Ox87k: With big cruelty! Thanx...
HMX0101 16. Feb 2006	i have some problems on the 1st serial, somebody can help me?
Ox87k 16. Feb 2006	to Klizma: i would shot u because the dump of ur crackme has made me to become crazy!!!! :P sorry for the delay of the solution but I've had problems with the dump file! Anyway, thx for this crackme! I'm waiting for KLiZMA Crackme#5 ;)
HMX0101 16. Feb 2006	i'm waiting the crackme #5 :D

KLiZMA's CrackMe #5 (Stupid)

Download CrackMe_#5_by_KLiZMA.zip, 3 kb (password: crackmes.de)
Browse contents of CrackMe_#5_by_KLiZMA.zip

Hola!

KLiZMA wrote another stupid crackme for you.

Rulz:
-unpack it carefully
-patch 1 byte (or 2 byte) of this crackme <-- it changed "Not patched!" to "Patched!"
-write good tutorial about...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 17. Feb, 2006
Downloads: 946

Rating

Votes: 6
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by Rambo, published 24. feb, 2006; download (1 kb), password: crackmes.de or browse.

Rambo has rated this crackme as nothing special.

Solution by EsKiMo, published 24. feb, 2006; download (10 kb), password: crackmes.de or browse.

EsKiMo has rated this crackme as quite nice.

Solution by acidflash, published 24. feb, 2006; download (64 kb), password: crackmes.de or browse.

acidflash has rated this crackme as awesome.

Solution by Kerberos, published 24. feb, 2006; download (54 kb), password: crackmes.de or browse.

Kerberos has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

Ank83 17. Feb 2006	Hi KLiZMA ! I need some help with unpacking. I search the web to find some tutorial for unpacking SVKP 1.3x - Pavol Cerven but I didn't find any good. All the tutorial I found lead me to the same error. All of them are with using OllyScripts. So give me some hint how to unpack this crackme ? I also want to ask you does the goal of this crackme is to print Patched ? Best Regards Ank83
HMX0101 17. Feb 2006	The crackme is not packed with SVKP, its packed with FSG XD
Ank83 17. Feb 2006	I notice that in Olly Dump, but I can't find the OEP ! That is my problem !
HMX0101 17. Feb 2006	@KLiZMA: You have encrypted/obfuscated the goodboy message? This make it a little bit more harder.
Ank83 17. Feb 2006	In Olly Dump it shows the FSG signature, bur PEID give me SVKP 1.3x - Pavol Cerven.
HMX0101 17. Feb 2006	Its easy to unpack: Find the JMP EAX and put a BPX here and run now the crackme break in the breakpoint, trace until this 3 jumps: 004001CD ^\78 F3 JS SHORT crackme.004001C2 004001CF 75 03 JNZ SHORT crackme.004001D4 004001D1 FF63 0C JMP DWORD PTR DS:[EBX+C] Put a BPX in the 3rd jump, run the crackme and this break in the jump, now trace with F7 or F8 and you land in the OEP :D
Ank83 17. Feb 2006	How can I find the OEP for this one ?
HMX0101 17. Feb 2006	It is useful to unpack?
Ank83 17. Feb 2006	hm... I found the 3 jump, put a breakpoint on it, and when i press F9 the app doen't get to the breakpoint ! It says: Error Dont know how to continue becase memory at adress F22E40B6 is not readable. Try to change EIP or pass exeption to program. I will try restarting my PC ! Maybe that's the problem.
Ank83 17. Feb 2006	no, that wasn't my problem.
Ank83 17. Feb 2006	it crashes when the second jump (of 3) reach this command kernel32.SetUnhandledExceptionFilter. Maybe something is wrong with my system file. (or I'm missing something). Thanks HMX0101
HMX0101 18. Feb 2006	To avoid this you can use the UnhandledExceptionFilter 0.22p or HideDebugger plugins.
KLiZMA Author 18. Feb 2006	Very interest fighting in this comments...
EsKiMo 18. Feb 2006	You can make OllyDbg show you the OEP by selecting "Trace real entry bytewise (very slow!)" in the SFX tab (Debugging options).
crazysky 18. Feb 2006	Why my replyes were disapeared?
Ox87k 18. Feb 2006	for unpacking no problem, but... KLiZMA u made a very g00d j0b! I'm in difficult to find the real byte to patch... i don't understand very well, so ur crackme make me confused! =\|
zairon Moderator 18. Feb 2006	To crazysky: >Why my replyes were disapeared? You surely broke one of our rules.
jB_ 18. Feb 2006	Same for me, sorry for my previous message which gave really too many tips... I almost gave the solution. Writing tips for this crackme without giving all is not easy. Another try: Ox87k : 'Not patched!', 'Patched'... Think about it. KLiZMA said "patch 1 byte (or 2 byte)". Why? =)
HMX0101 18. Feb 2006	I think that the goodboy message has encrypted/obfuscated, and this make a little more harder.
kemp 18. Feb 2006	Sent my solution for this.... not sure if it's the correct way to patch it but.... it works! and only 2 bytes ;-)
crazysky 19. Feb 2006	It is just change the beginning address of "Not patch!" to point to the "p" charactor!
Ox87k 19. Feb 2006	crazysky has had my same idea (only 1 byte) =) but i think it's wrong... I'll wait for some solution! (thanks klizma and jb!)
crazysky 21. Feb 2006	Ox87k,why do you thought my idea is wrong? Can you show me?
Ox87k 21. Feb 2006	is my thing! i don't sure that this way is correct but... try ;) i'm waiting the solutions!
HMX0101 21. Feb 2006	my way to beat this crackme is very lamest and maybe the solution can be rejected XD
HMX0101 21. Feb 2006	SOME BYTES modifieds (not 1 or 2, various) XD
HMX0101 24. Feb 2006	my solution has rejected because too much solutions XD
HMX0101 24. Feb 2006	i'm waiting the crackme #6 XD
Ox87k 24. Feb 2006	all unpacked solutions files don't work for me. Crash! I've WinXP SP1.. however the my and crazysky idea is right =) Seems to be too much stupid to be true! ehehe!! i'm waiting for crackme#6 ;)

KLiZMA's CrackMe #6 (ASCII)

Download CrackMe_#6_by_KLiZMA.zip, 10 kb (password: crackmes.de)
Browse contents of CrackMe_#6_by_KLiZMA.zip

Hola!

KLiZMA wrote another crackme for you.

Rulz:

1. Find the correct Name/Serial combination
to register .:: The KLiZMA'a ASCII Table::.
2. Write tutorial about it...
3. No patching and selfkeygenning.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 15. Mar, 2006
Downloads: 705

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

Ox87k 15. Mar 2006	damned.. i don't see ur crackme in my process.. ollydbg and ida don't open it... why?! i need some help... how I can open it?! =\|
TQN 15. Mar 2006	A Turbo/Borland C++ for DOS crackme with overlay data
Ox87k 15. Mar 2006	and so not olly or ida?
l0calh0st 15. Mar 2006	Not a valid PE file??????What to do>>>???
TQN 16. Mar 2006	IDA can disassembly it, uses a old DOS debugger to debug.
KLiZMA Author 16. Mar 2006	to Ox87k he-he! try to include brainz... DOS will help you...
HMX0101 16. Mar 2006	Ox87k: maybe you can use Turbo Debugger 2.01 or Debug in msdos :)
HMX0101 17. Mar 2006	Turbo Debugger 2.01 not work and IDA show a larger code...
TQN 17. Mar 2006	Apply Borland/Turbo C++ 3.1 for DOS signature, and somethings will more clear
Ox87k 17. Mar 2006	i'm waiting for a solution :P
HMX0101 17. Mar 2006	TQN, thanks for the tip!
KLiZMA Author 23. Apr 2006	And noW! No solutions available at this time! No packers, tricks.. Only find password... Name: your name Pass: 666 Enjoy!
l0calh0st 23. Apr 2006	Anyone with solution????? Or maybe KLiZMA could write a tut for his own crackme :P

KLiZMA's UnpackMe #1

Download UnpackMe#1_by_KLiZMA.zip, 197 kb (password: crackmes.de)
Browse contents of UnpackMe#1_by_KLiZMA.zip

After 2 months...
KLiZMA wrote another unpackme for you.

Rulz:

1. Unpack it maliciously...
2. Change "UNREGISTERED" to "REGISTERED"
3. Write tutorial about...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 27. Apr, 2006
Downloads: 1333

Rating

Votes: 8
Crackme is boring.

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Solutions

Solution by kienmanowar, published 14. may, 2006; download (248 kb), password: crackmes.de or browse.

kienmanowar has rated this crackme as nothing special.

Solution by EvOlUtIoN, published 05. may, 2006; download (246 kb), password: crackmes.de or browse.

EvOlUtIoN has rated this crackme as nothing special.

Send a message to Kmos »

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Discussion and comments

deroko 27. Apr 2006	nice one, my russian brother :)
KillYuRi 28. Apr 2006	ya pretty simple mm execute first pushad, breakpoint on hardware access [esp register] reconstruct with import reconstructor 1.6 then hex edit it ;) -Good example of this in the ARTeam tuts.
EvOlUtIoN 28. Apr 2006	LOL very simple!
kienmanowar 12. May 2006	Done! I wrote another tut !! Thanx all :)
yaMobilko 05. Apr 2008	lol brains not needed
-DIMAIN- 07. Apr 2008	lol Published: 27. Apr, 2006 Downloads: 666
r-Evolution 04. Oct 2010	well!!i was quite confused....I found the OEP but when i tried to rebuild IAT i found too many invalid pointers...It looks like there something like IAT redirection or a similar anti-unpacking trick right??? Thanks my communist mate
r-Evolution 04. Oct 2010	but as i see from the comments it has to do with overlay...

Kmos's Kmos's CrackMe #1

Download ex_kcrk1.zip, 141 kb (password: crackmes.de)
Browse contents of ex_kcrk1.zip

Kmos CrackMe #1

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 06. Sep, 2002
Downloads: 4768

Rating

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Solutions

Solution by Bswap, published 10. sep, 2002; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

Knight's Knight's Crackme#1

Download Knights_crackme#1.zip, 14 kb (password: crackmes.de)
Browse contents of Knights_crackme#1.zip

My first crackme :)
Don't know what to say more. Get it and see everything on your own."

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 26. May, 2005
Downloads: 1040

Rating

Votes: 4
Crackme is boring.

Rate this crackme:

Solutions

Solution by red477, published 03. jun, 2005; download (10 kb), password: crackmes.de or browse.

red477 has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

bbvv 05. Nov 2005	I'm too sorry the submission of solutions is closed... I looked into red477's keygen and it's imperfection that it generates only one unique serial for any name. I have written a keygen that generates many different serials (as many as you define, 20, 30..) for any name for this crackme. And all these serials are suitable! It is just because of the recursion!..
bbvv 05. Nov 2005	for example, for name "Knight" not only 8000-72E4-2A6C is suitable; there are ee82-8066-4232 c86a-a12a-876e bc34-b6d6-a31e F024-8040-4536 d698-373e-28ea FB34-AEF6-A3FE E544-B1B4-7AC4 ed0c-eba4-75f0 EF74-2014-1B70 d17c-4812-2682 c494-b5ca-858e df14-4764-2be0 c220-4cac-32c8 B934-7A24-5F8C CC18-90AE-646A B8A4-5BA4-56A0 F864-4620-3A8C E1CA-818E-5012 eedc-2858-1702 EE50-1CD4-13C8 all suitable

Knight's Knight's Crackme #2

Download Knight__s_Crackme_2.zip, 17 kb (password: crackmes.de)
Browse contents of Knight__s_Crackme_2.zip

My second crackme. Bit harder than the first one.""

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 05. Aug, 2005
Downloads: 1130

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by bbvv, published 17. nov, 2005; download (24 kb), password: crackmes.de or browse.

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Solution by oklahoma, published 15. aug, 2005; download (40 kb), password: crackmes.de or browse.

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Send a message to konstAnt »

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Discussion and comments

TQN 16. Jun 2005	Great and hard plugin, Knights ! A new, clever and simple way to injected and hidden teerayoot.dll by GetModuleHandleA.
TQN 16. Jun 2005	Sorry, I type wrong. "To find the injected and hidden..."
Knight Author 16. Jun 2005	Yeah, seems you have hidden olly but forgotten your own plugin :) Hope in next versions OllyInvisible won't be so easy detecteble. Have u allready cracked it?
GR33d 19. Jun 2005	can someone post a solution with a tute? im connfused lol
TQN 20. Jun 2005	I am crack it in my free time. I use IDA to analyze it. To by pass the checking for teerayoot.dll, we can open the Invisible.dll in hex editor, replace the teerayoot.dll (ansi and Unicode) text with any name we want, and replace the name of teerayoot.dll in disk with that name. And below is my idc script to decode the check function. This function is new subclass function for edit controls in crackme. // decrypt the subclass window proc in Knight's Crackme #2 // TQN #include <idc.idc> static main() { auto ea; for (ea = 0; ea < 0x19C; ea++) { PatchByte(0x00409000 + ea, Byte(0x00409000 + ea) ^ ea); } } Hope another experience reverses will continue with this fun crackme. Best regards, TQN
bkslash 24. Jun 2005	I've written a keygen for this crackme, I'll post it here as soon as I write a solution. BTW there are some names for those it's impossible to generate a serial (for example bksla and Knightd).
Knight Author 25. Jun 2005	Well there are some names whitch doesn't have serials, but there are much less them than you think. When CuTedEvil approved my crackme he asked serial for his name, here it is: 00821-64000-64002-00019-0084F . I'm posting it here because your keygen can't generate serial for this name. Man you missed something, something what makes things much easier. Regards
CuTedEvil 25. Jun 2005	Yeah, that's actually why I asked for a serial for my name, Knight gave me a working serial, so all of you, THINK HARDER :) btw Knight, I like ur crackme. I hope to see some PERFECT solutions from you guyz. Best Luck CuTedEvil
bkslash 26. Jun 2005	Oh yes, I've found a bug, fixed it and submitted a new version of solution.
Knight Author 19. Nov 2005	Intresting fact, that nobody noticed what all those xor's in name hashing funtion do. They just swap values, and everybody whose keygens I saw left everything how it is. I meen some of those xor's might be removed. Anywayz, nice solution, bbvv. Regards, Knight
oklahoma 20. Nov 2005	oh really? look at my solution, file "knightcm2.cpp" you just do not read solutions carefully. ....................... // ... and tashy code, yup I'm lazy to make a candy... hash1=hash3^temp^(hash2^temp)^(hash2^temp^(hash3^temp^(hash2^temp))); hash2=hash2^temp^(hash3^temp^(hash2^temp))^(temp^(hash2^temp^(hash3^temp^(hash2^temp))))^hash3^temp^(hash2^temp)^(hash2^temp^(hash3^temp^(hash2^temp))); hash3=temp^(hash2^temp^(hash3^temp^(hash2^temp))); /* i.e hash1=temp^hash2; hash2=hash2; hash3=hash3; */
oklahoma 20. Nov 2005	"tashy" means "trashy" :)
oklahoma 20. Nov 2005	and there is still no key for name "zairon". :(

konstAnt's HellrAiser System Utils v6

Download HellrAiser.fms6.zip, 95 kb (password: crackmes.de)
Browse contents of HellrAiser.fms6.zip

A more difficult than previous than....
I'm so lazy that I even don't like to write
a detailed readme. From next time.....(shh.shh)
I would ask _khAttAm_ to write my crackme.

Ok a crypto and other mixture this time:

The main theme of the program is to find
a valid passw0rd and your "All" menu will
be enabled.

Greetz:
In the crackme.

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: (Visual) Basic

Published: 05. Sep, 2005
Downloads: 912

Rating

Votes: 7
Crackme is nothing special.

Rate this crackme:

Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

konstAnt Author 09. Sep 2005	Well, try this Oorja. This one is basically made for u. Its a challenge for u??. Solve it. Ok..... Have a headache Dashara.... If anyone likes crypto then try this one.
konstAnt Author 14. Sep 2005	He....he I'm out of the top coder list still the spritual value doesn't diminishes........
deroko 17. Sep 2005	give me one good reason why shouldn't I patch this instead of going trough all that checking(boring loops) ??? and it ain't okay writing like that stuff in crackme about other pepole on crackmes.de...
deroko 17. Sep 2005	http://deroko.headcoders.net/cracked/ here you go solution and file...
konstAnt Author 30. Sep 2005	Do u say that cracking my topic is find my secret and u still don't know the secret...
deroko 30. Sep 2005	what secret are you talking about? those loops that eat my cpu time? well no, just one jmpy over them and I've saved my CPU...
Gauri 17. Oct 2005	Yah i'm trying it...
konstAnt Author 14. Jun 2006	Hey is there anyone who is going to solve it????

konstAnt's HellrAiser System Utils v 2

Download hellrAiser.unnAg.zip, 75 kb (password: crackmes.de)
Browse contents of hellrAiser.unnAg.zip

Hey people you'll love this if you love nags otherwise not.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Unspecified/other

Published: 19. Aug, 2005
Downloads: 1153

Rating

Votes: 7
Crackme is boring.

Rate this crackme:

Solutions

Solution by Oorja-HalT, published 27. aug, 2005; download (48 kb), password: crackmes.de or browse.

Oorja-HalT has not rated this crackme yet.

Solution by deroko, published 27. aug, 2005; download (100 kb), password: crackmes.de or browse.

deroko has rated this crackme as nothing special.

Solution by bRaiN_faKKer, published 27. aug, 2005; download (38 kb), password: crackmes.de or browse.

bRaiN_faKKer has rated this crackme as boring crap.

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Discussion and comments

konstAnt Author 20. Aug 2005	Hey guyz, There's something wrong with Crackme.de My crackme was accepted yesterday and it wasn't shown in the list. Still it was accepted.
_khAttAm_ 20. Aug 2005	Hey yo konstAnt... you are on the top coders list....... I don't know how but still... welocme to hall of fame.................
Oorja-HalT 20. Aug 2005	Solution submitted
_khAttAm_ 23. Aug 2005	Solution Rejected...
_khAttAm_ 23. Aug 2005	?? Hehe.......... And yo Oorja...... Haven't you succeeded in any of mine??
Oorja-HalT 24. Aug 2005	no i didnt submit it because i dont wanted konstant to complain again.BTW i can mail it to u
Gauri 24. Aug 2005	Yah then why not mail me. And I'm sure you haven't done more than dumping it. Ha.... Ha... Oorja su?*%
Oorja-HalT 24. Aug 2005	Who are you neway and why should i send it to you. And please it doesnt effect me what you think. Result is with khattam and he is the right person as of now to make a comment
_khAttAm_ 24. Aug 2005	Hey yo Oorja.... Looked at your dump...... Actually, konstAnt should have made a comment o your dump, had you sent it to him............. But I checked the dump doesn't seem to be fixed........... and hence doesn't run.............. I'm poor at that........ And BTW, who's this Gauri SHIT?? f@#$ off .......
Oorja-HalT 24. Aug 2005	This is the limit. I have a fully working dumping with no nags in win98se anbd i dont think there is anything version specific that should effect. What else does one need . And if you need anything special you should cleearlt mentioned. BTW i have decided to submit the solution and let other memebers decide on you guys tantrums. I haev had enough
_khAttAm_ 24. Aug 2005	Oh Oorja.......... If you make one work successfully in WIN 98 only, it may not be approved, coz the server ppl (at least blackeye) have XP SP1, and non of your dumps work in that....... So....... Think about it.......
konstAnt Author 25. Aug 2005	Ha.. Ha Oorja. I'm in Russia but being the member of _khAtArA_ group. He said that you have only dumped it and the comedy of all it didn't work. And _khAttAm_ said me to tell you 'machkiney". I don't know what it means.
deroko 25. Aug 2005	yah cracked, no NAGs, works on winxp SP2, havent tested on SP1 but I don't see why It wouldn't work... I'll submitt my solution, and this p-code is really anoying, but what the heck...
deroko 25. Aug 2005	submitted solution...
deroko 27. Aug 2005	sollution updated, p-code patched and also asm patch is submitted...
konstAnt Author 28. Aug 2005	Well mods have viewed the solution. Now I'll view it and give comments. Now try my next versions.
konstAnt Author 29. Aug 2005	Ok OoRja your tutorial was a focks. Other were nice. But from next time, ............ Would you bother writing a tutorial for newbies.
_khAttAm_ 29. Aug 2005	Oh come on........konstAnt........ Te tut was good........... And LOL, it even explained the theory of all of your crackmes (and some of mine too, hehe)
Gauri 01. Sep 2005	Now try v4 and v5
_khAttAm_ 01. Sep 2005	Who the hell is this Gauri again?? come konstAnt, shut him/her up...
Gauri 17. Oct 2005	Yah that was a fantastic one...

konstAnt's HellrAiser System Utils v 3

Download HellrAiser3.zip, 117 kb (password: crackmes.de)
Browse contents of HellrAiser3.zip

Hey,

Guyz A new piece of unnaging. Not really a nag. But a talkative guy. Hanging up your desktop
Try to patch the speaks. So I'll name it unspeakme. This is a good accesspassw0rd crack if you crack it. For WIn 2000/XP only. But you can run it under WIn 98 if you have sapi and msgent installed.

That's all.

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 20. Aug, 2005
Downloads: 920

Rating

Votes: 7
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by bRaiN_faKKer, published 27. aug, 2005; download (62 kb), password: crackmes.de or browse.

bRaiN_faKKer has rated this crackme as boring crap.

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View profile of konstAnt »

Discussion and comments

_mAkA_pOuDeL 20. Aug 2005	Hey konstant you told that you have cracked myone. Then where's the tutorial?????//
konstAnt Author 24. Aug 2005	Well, I don't like taking tensions but I love giving tension to the crackers.
_khAttAm_ 24. Aug 2005	Oh konstAnt..... You never stop copying..... You know what..... And BTW, if you have solved mAkA's crackme, so why not help others out with a short and sweet tut........ I'd love to see it from you............
_khAttAm_ 24. Aug 2005	and BTW, who rated this VB crackme awesome?? hehe......
konstAnt Author 29. Aug 2005	Well good tut Faker... And good patcing.
_khAttAm_ 29. Aug 2005	Oh konstAnt..... did it run on your computer without errors?? In mine, it gave a runtime error when I tried to use the cracked proggy........ PS: I have WIN XP Home SP2
Gauri 01. Sep 2005	Well it worked on mine
konstAnt Author 09. Sep 2005	Ha.. ha... Only some patching. You can try to learn some new methods.

konstAnt's HellrAiser System Util v4(Find my Secret)

Download hellrAiser.fms4.zip, 55 kb (password: crackmes.de)
Browse contents of hellrAiser.fms4.zip

Hey focks,

If you don't find the secret box then click the slider. It is where it appears.

If my last crackme was boring then this won't bore you.

Just find my secret and write a valid tutorial.

There is only 1 working serial.

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: Unspecified/other

Published: 22. Aug, 2005
Downloads: 1003

Rating

Votes: 9
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by Gyver75, published 28. jul, 2010; download (2986 kb), password: crackmes.de or browse.

Gyver75 has rated this crackme as nothing special.

Send a message to konstAnt »

View profile of konstAnt »

Discussion and comments

_mAkA_pOuDeL 23. Aug 2005	Hey man. I don't know how it raises the hell.
konstAnt Author 09. Sep 2005	Ok somewhere is there where it raises hell on your computer.
red477 09. Sep 2005	i am a newbie and just want to see what the HARD crackeme looks like:)but it prompts me"Component 'COMDLG32.OCX' or one of its dependecies not correctly registered:a file is missing or invalid":( Microsoft Windows 2000 5.00.2195 Service Pack 3
_khAttAm_ 09. Sep 2005	@red477 Download the file COMDLG32.OCX from the internet........... Just google for it.............. and then place it in your system folder............ That shud do..........
_mAkA_pOuDeL 10. Sep 2005	Why don't you try Service Pack 4. Or do as _khAttAm_ said.
konstAnt Author 14. Sep 2005	He he... thanks for speaking on my side. Ok well this works
konstAnt Author 30. Sep 2005	Well if u can't do then ask me for the source..........
apuromafo 29. Feb 2008	i have 1 unpacked.or de sfxed-- weell if wana crack this crackme is better the unpacked.. patch i think that is better.. 1 patch and cracked..

konstAnt's HellrAiser System Util v5(Keyfile me)

Download hellrAiser.keyme.zip, 59 kb (password: crackmes.de)
Browse contents of hellrAiser.keyme.zip

Well,

konstAnt back again. This is a keyfile me.

Just a simple one. Only rate it 8/10

Well happy cracking.

Rulz in the readme.

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 25. Aug, 2005
Downloads: 894

Rating

Votes: 6
Crackme is boring.

Rate this crackme:

Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to konstAnt »

View profile of konstAnt »

Discussion and comments

_khAttAm_ 25. Aug 2005	What is that 33 when I click the About button?? And you have forgotten to add any description in the about box, I suppose............. Anyways, good crackme.....
konstAnt Author 26. Aug 2005	He..he... That's my style.
konstAnt Author 14. Sep 2005	He..he no one could keyfile it. If u can't crack it ask for the source and I'll give it to you personally.
Shism 14. Sep 2005	Even though no one cracked it... Why don't you asked the more experienced crackers to do it... Instead of waiting for them to do it... Why not ask zairon to try your crackme?
deroko 15. Oct 2005	one question... you are using __vbaLenVar to get length of text and compare it with 50h (80d) but latter on you are looking for 81st and 82nd char in two places by setting counter to 1 and incrmeneting it by 2 till 50h, at last loop counter is 49h you increment it by 2 and you check for (counter+2) = 81st char which doesn't exist... Shall I patch counter? I don't see any other posibillity...
konstAnt Author 15. Oct 2005	No no u can't patch..... You r supposed to find a valid serial and try the crackme according to the rulz... And the counter trick is a part of difficulty of the crackme...
deroko 15. Oct 2005	ok, I'll try to figure that out later =) got all 9 passes but that counter is really strange =)
deroko 19. Oct 2005	heh I think that counter is a bug not a feature, simple: if we cann't put more than 50 chars, how is it supposed to read 51st and 52nd (it will and get 0 for both) and it will cause crash handled by SEH when 0 is passed to some vb fpu procedure... I cann't solve it without patching 2 loops from 50 to 49...
konstAnt Author 21. Oct 2005	Well I gave u the source and next time I'll send u the whole source...
konstAnt Author 21. Oct 2005	Keyfile not working man.....
deroko 21. Oct 2005	ofcourse it is not working and I'm sending to you why it won't work and you will see that you are scanning for 81st char... as I promised output from sice is coming =)

konstAnt's Hell Raiser System Utils Find my Secret v1

Download hell.Crkme.zip, 74 kb (password: crackmes.de)
Browse contents of hell.Crkme.zip

This is my first crackme in this website and i can sya that this'll be a challenging step for top coders. If you are a newbies then I'll suggest you not to try this crackme. That's all I can say about it.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Unspecified/other

Published: 10. Aug, 2005
Downloads: 1056

Rating

Votes: 9
Crackme is boring.

Rate this crackme:

Solutions

Solution by Oorja-HalT, published 19. aug, 2005; download (30 kb), password: crackmes.de or browse.

Oorja-HalT has not rated this crackme yet.

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Discussion and comments

Oorja-HalT 11. Aug 2005	I have made a post bout this crackme. It uses pdh.dll : for that OS has to be win2000 or higher.But it has not been mentioned.Then why this post has been deleted Secondly no instruction/information is provided as what has to be done. All one gets is a system utility running.Where is the reversing bit in that
konstAnt Author 13. Aug 2005	Yah khat there was probably a readme and perhaps u haven't read it or there was a big mistake. And wow! top coder and top solver both posted in my forum. Well, No patching(Except the patch me section) And top solver(OORja), It works in all system coz i have tried it. That my trick. Find it.
Oorja-HalT 13. Aug 2005	Now i am even more confuse God forbid me
konstAnt Author 15. Aug 2005	A lots of complain about Readme so here it is...... â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ :Hellraiser System Utilities v1: â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ :Target: â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ 1. Find a valid Serial/Password. No patching allowed(except the patch me) 3. Write a good tutorial. :) â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ :Platform: â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ All Windows â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ :Difficulty: â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ Quite Hard. I'll rate it 5. â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ :Protections: â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ 1. Packings.(UPX). Difficult enough. 2. Hardcoded Serial. Very Very difficult. â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ :Helpful Notes: â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ 1. If you are a newbie, it is not for you. Try some easier ones and come back to this. Hehe :) â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ :Greetz: â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ Crackmes.de Team
konstAnt Author 20. Aug 2005	I still don't know why the soln was submitted. There is no keygen. And he hasn't patched it too.
_khAttAm_ 20. Aug 2005	Yo Oorja........ To see where you shud patch it, try the "Fully Optimize" button..........
_khAttAm_ 20. Aug 2005	And konstAnt............... You were seen on the top coder list..... Yeah I know that was some kinda mistake............ but well, hehe And yo........ you have a very bad habit of deleting our posts........ Why is that??
Oorja-HalT 20. Aug 2005	Quote "I still don't know why the soln was submitted. There is no keygen. And he hasn't patched it too. i think u mentioned this â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ :Target: â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢ 1. Find a valid Serial/Password. No patching allowed(except the patch me) 3. Write a good tutorial. :) And what exectly do you mean by no patching done You have mentioned no patching allowed. Please be specific as to what you want in future.
Oorja-HalT 20. Aug 2005	ok that was a mistake you mentioned except patch me.Fine
konstAnt Author 09. Sep 2005	Where is the patchme.. It is still not solved.
Gauri 17. Oct 2005	Wow the crackme is fascinating
D4ph1 18. Oct 2005	I get the "Error while reading the Process Memory" but the temp file runs fine...Do I have to fix something or just crack the temp file?
_khAttAm_ 18. Oct 2005	@D4ph1 You can't patch actually...... You'll need to find a serial and the real exe is the temp file......
konstAnt Author 19. Oct 2005	You have to fix the temp.. That is write some patch that the loader makes..

konstAnt's konstAnt Crackme 7

Download Crackme_7.zip, 66 kb (password: crackmes.de)
Browse contents of Crackme_7.zip

konstAnt Crackme 7
=-=0-=-=-=-=-=-=-=
Yet another crackme by konstAnt.. And this time is a keygen me...:P

Not a system utility this time... A crackme after a long time....:lol
All u have to do is find a serial for the hardware code.. and make a keygenerator....

Think it would be easy and u'll have fun keygening nothing good trick...
But some confusing one and I'll like to rate it 8/10

And won't be angry only if one of he solver suggests to lower the level of the crackme...

:P

[Hintz]
Every thing including the serial checking goes in the serial.dll:P If u can find it

Greetz:
Oorjahalt{Perhaps the spelling is worng, I missed him a lot and welcome back again}
_khAttAm_
[A]bu
TDCNL
Rem Members
and all crackmes.de members

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 12. Dec, 2005
Downloads: 1455

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by zairon, published 14. dec, 2005; download (22 kb), password: crackmes.de or browse.

zairon has not rated this crackme yet.

Solution by Game-Over, published 14. dec, 2005; download (57 kb), password: crackmes.de or browse.

Game-Over has not rated this crackme yet.

Solution by deroko, published 14. dec, 2005; download (18 kb), password: crackmes.de or browse.

deroko has not rated this crackme yet.

Send a message to KoЯn Rulz »

View profile of KoЯn Rulz »

Discussion and comments

strelok 12. Dec 2005	symantec antivirus reports Bloodhound.W32.EP in serial.dll WTF?
deroko 13. Dec 2005	it is not virus, trus me, I've solved it and false positive is generated b/c part of packer is missing(padded with 0) at entrypoint and entrypoint is in pe header.
konstAnt Author 13. Dec 2005	He..he.. :lol You r great derko
strelok 14. Dec 2005	so, will anybody submit a solution? i've unpacked and fixed keygen exe, but sniffing in vb code is just weird

KoЯn Rulz's KoЯn Rulz's PatchMe1

Download CrackMe1.zip, 4 kb (password: crackmes.de)
Browse contents of CrackMe1.zip

This Requires Code Injection.

It Is Actually Possibe, But Is Kinda Strange.
I Can't Really Describe It Better Than With, It's A PatchMe That Needs Code Injection.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 09. May, 2008
Downloads: 848

Rating

Votes: 5
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by main, published 16. oct, 2008; download (5 kb), password: crackmes.de or browse.

main has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

TiGa 09. May 2008	The goal is to make the crackme display a GoodBoy message box. That's it.
TiGa 09. May 2008	I think that he made a crackme and then NOPed everything. It's not a good idea in itself as it causes many crashes and lacks explanations. It doesn't do anything, that's the point. You need to patch it so it displays a GoodBoy message box. It crashes on Vista too.
DigitalAcid 09. May 2008	Uh, what the f ? Are we supposed to make a messagebox and display a string ourself or what ? If you want us to "modify" your code, it's alot easier to start something from scratch =).
Sinok 09. May 2008	Cracked :S I think.. Title: Hi Text: Good-Boy! (or smtn like that)
KoЯn Rulz Author 10. May 2008	It's Not A Virus, It's Just That It's Got So Many NOP's That Some Virus Scanners Think It Is. (Ad-Aware, Bit Defender, And KasperSky Are TheOnly Ones I Know Of So Far.) Also Thanks For The Note About KasperSky, Sinok.
KoЯn Rulz Author 10. May 2008	I Have Windows Media Center Edition So I Don't See Why You Guys Are Having Issues.(Exept For On Vista)
Sinok 10. May 2008	I cracked it, DigitalAcid cracked it too xD And please, I beg you, Stop Writing LiKe ThiS.
KoЯn Rulz Author 10. May 2008	Sinok, If You Cracked It, Send In A Solution So That Noob's Can Be Helped.
Sinok 10. May 2008	You won't get a solution, you can't make this file work on other computers, only on your own, TiGa knows what I'm talking about. ;P
DigitalAcid 10. May 2008	Yeah, the MessageBox API wasn't there, i had to fix it myself to see what we were supposed to do =).
Sinok 10. May 2008	Dunno how you call it, but theoretically I know what happened, he noped something he shouldn't have. :\|
br0ken 24. May 2008	From what I understand this exe should display 2 messages boxes. Right? Is it okay if the 2nd one has "OK" and "Cancel" instead of Yes and No?
costy 04. Jul 2008	Ok the first message box is ok. I made some changes with LordPe and it works on all pc. The first one doesn't want to appear. Give me an help please!
costy 04. Jul 2008	mistake... the second messagebox doesn't want to appear. The first one is easy.
br0ken 04. Jul 2008	I submitted a solution, but i'm not sure if that's what the author wants. Anyway, lets see what happens.
main 17. Oct 2008	Oops, I forgot that the crackme should show Yes and No! Sorry! But this is of course very easy to correct. Just change the style parameter.
itsho 19. Oct 2008	main: 1. your "injected" crash on my machine (xp sp3). since the "MessageBoxA" api is not imported in the file - the address is different on my comp. can someone teach me how to inject "import the call" ? 2. the authur asked for YES NO Msgbox- so you need to do push 4 instead of push 0 before calling messagebox: PUSH 4 ; /Style = MB_YESNO\|MB_APPLMODAL PUSH Injected.0040864C ; \|Title = "Injected by main" PUSH Injected.004085DC ; \|Text = "Registered" PUSH 0 ; \|hOwner = NULL CALL USER32.MessageBoxA ; \MessageBoxA PUSH 0 CALL kernel32.ExitProcess
main 19. Oct 2008	itsho: Quote from my solution: "Search for all Names (Ctrl+N) and right click on MessageBoxA, select "Follow import on Dissasembler". We have to do it this way because the file is packed and we cannot call imported functions because of that." :) And yes, the style parameter is 4 in that case.
izlesa 08. Dec 2008	wtf, in archive prog is not run ...
qHF; 10. Nov 2009	I cracked it and recorded a tutorial but it won't upload correctly (maybe its too big?). Here is the [flash] tutorial for anyone who wants to learn: http://willhostforfood.com/access.php?fileid=93955 (~8mb)
madmaurice 11. Jul 2010	crap... just crashes on run.

KoЯn Rulz's Unpackme1 by KoЯn Rulz

Download Unpackme1.zip, 2 kb (password: crackmes.de)
Browse contents of Unpackme1.zip

All info you need is in the readme. Try to make it as if you had just compiled the asm code.

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Assembler

Published: 22. Oct, 2009
Downloads: 582

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by DoomsDay, published 28. oct, 2009; download (2 kb), password: crackmes.de or browse.

DoomsDay has rated this crackme as nothing special.

Send a message to $KORBUT »

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Discussion and comments

tony 23. Oct 2009	it's very easy
DizzY_D 28. Oct 2009	not running @ win7
saitob 28. Oct 2009	It says Windows 2000/XP only tho...
Hyperlisk_ 30. Oct 2009	Yes, it was pretty easy.
EvOlUtIoN 08. Jul 2010	Level 3 is too much for it, maximum is level2 or better 1.
r-Evolution 12. Sep 2010	I have no access to an xp box so i can't unpack it eventhough i ran it with wine and it worked well on ubuntu.Finding the OEP is a piece of cake.Eventhough i am not permitted to unpack it i have a question for u...U say the unpacked executable will be 2 to 5 kilobytes.How would it be if i remove the two useless sections after unpacking???

$KORBUT's Anti Patching Technology

Download apt.zip, 13 kb (password: crackmes.de)
Browse contents of apt.zip

A new anti patching technology crackme

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 03. Aug, 2003
Downloads: 2374

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Solutions

Solution by CuTedEvil, published 04. aug, 2003; download (1014 b), password: crackmes.de or browse.

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$KORBUT's Keygenme #1

Download keyme1.zip, 10 kb (password: crackmes.de)
Browse contents of keyme1.zip

Our first keygenme

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 03. Aug, 2003
Downloads: 2666

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Solutions

Solution by fjlj, published 01. nov, 2005; download (55 kb), password: crackmes.de or browse.

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Solution by Apocalyps, published 06. dec, 2003; download (16 kb), password: crackmes.de or browse.

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Solutions

Solution by GR33d, published 13. oct, 2004; download (6 kb), password: crackmes.de or browse.

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Solution by bRaiN_faKKer, published 16. sep, 2003; download (5 kb), password: crackmes.de or browse.

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$KORBUT's RIF Crackme #3

Download rif_crackme3.zip, 24 kb (password: crackmes.de)
Browse contents of rif_crackme3.zip

You must make a brute forcer for this crackme

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 03. Aug, 2003
Downloads: 2074

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Solutions

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Solutions

Solution by ratsoul, published 19. apr, 2007; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

pseudonym 01. Apr 2007	Well I'm pretty sure I understand at least the first password algo - but without a supercomputer, I ain't gonna even try bruting it; but I can't see any other way? Have I missed something?
Kostya Author 01. Apr 2007	Dunno about the supercomputer, but to solve this one i used my old computer: 700MHz (256MB memory). That's it. So u missed something. Dunno what. But i can say that it is easy to solve but not to brute. The first pass maybe u can brute but the second one is impossible to brute. So i recommend u to look through the code and to sinlge out the main algo. Just imagine what these all instructions looks like. So, there is another way (without bruting). And btw, it's maybe not level 2, it's just my opinion. It is a bit higher (maybe yes or maybe no). :))
pseudonym 07. Apr 2007	To me the first algo looks something like: (A1a)+(A2b)+...+(A9*i) = K Where A(x) = Constant values (hardcoded) K = constant value (hardcoded) a,b,c... = values to discover - which will be ascii char codes. Maybe my maths isn't good enough to work out a simple solution...
bundy 07. Apr 2007	Actually, you wrote here only a small part of the first algo. There are some more similar parts (with different A(x) and K's). After you write those under what you already have ...
Kostya Author 08. Apr 2007	What bugs? Have u found the last pass?
ratsoul 17. Apr 2007	Nice crackme... but solved :)
Kostya Author 19. Apr 2007	Good work ratsoul, next crackme wouldn't be so easy, I swear! :)
bundy 20. Apr 2007	Really good work ratsoul. If I wouldn't be as lazy as I am, I would write a solution as well. As I understood the code the procedure 3 you mention is a in-place base64decode function (a very nice one [the range checking is awesome]). Next thing is the procedure 4 - I called it simply convert. If the base64 decoded string starts with $, x or X a hex conversion starts. So there are 4 direct passwords for 3rd editbox: $5ADFA680 = JDVBREZBNjgw x5ADFA680 = eDVBREZBNjgw X5ADFA680 = WDVBREZBNjgw 1524606592 = MTUyNDYwNjU5Mg== Waiting for another math crackme ;)

Kostya's KeygenM3Crypt (caffeine crackme)

Download Cr4ckM3#2.zip, 24 kb (password: crackmes.de)
Browse contents of Cr4ckM3#2.zip

Plz view README file (for rulez and etc.)
__________________________________

This is my second KeygenMe, so I decided to make it more
difficult then i made before (KeygenMeNo1). So try to solve
it and write a solution with your keygen. Or if you can't
write a keygen, try to make a bruter for this keygenme.

Now level: 2 or 3 or maybe 4
Name: KeygenM3Crypt #2 (CAFFEINE_CRACKME)

I actually don't know what level this crackme can be :) so
plz, rate for the level :), and post here :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 09. Sep, 2006
Downloads: 670

Rating

Votes: 8
Crackme is nothing special.

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Solutions

Solution by ratsoul, published 09. nov, 2007; download (358 kb), password: crackmes.de or browse.

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Discussion and comments

Kostya Author 02. Sep 2006	Any problems!? :)
AlexeyG 02. Sep 2006	The crackme looks very interesting. I never did a level 3 before, only 1-2. But I think it ain't level 3 for sure.. the algo is huge
BaKaE 02. Sep 2006	i dont understand the algo 1. it convert the name to 2 another versions 2. it copy the first 8 chars of a hardcoded string 5 times why?? pleaze explain!! can someone solv this pleaze, i would like to read a tut!!
AlexeyG 02. Sep 2006	Then it makes 2 DWORDS from these 2 new usernames. And then it plays with password\serial I belive. I didn't look further - had no time. Oh and string is not copied 5 times, but 5.25 times (2 more chars are copied). That's all I got, perhaps will look more when I get time. But yes, if someone solved it already - please write a tut!
AlexeyG 02. Sep 2006	ohh and another part I liked is rdtsc!! from a part, that one of these DWORDS are made with addition of part of _rdtsc and then substraction of this part from another _rdtsc a new DWORD is made :) may be it's all junk code, I dunno - haven't looked, but sure is interesting!
badmojo 09. Sep 2006	There seems to be a little bug with this crackme which makes it easier to crack than it actually is. I've messaged Kostya about it.
zairon Moderator 09. Sep 2006	Crackme updated.
Kostya Author 09. Sep 2006	Yeah! It became a bit harder :) badmojo can u solve it!? ;)
Crosys 09. Sep 2006	Interesting stuff, maybe solving it later
Gauri 26. Sep 2006	Hey What's There. Can't be solved...
Kostya Author 27. Sep 2006	too hard :) to solve it :)
sd333221 28. Sep 2006	If you give an example number i will try to make a bruter
Kostya Author 28. Sep 2006	Don't think that u can :) Key contains: special symbols (.,&.. etc), alphabet (uppercase, and lowercase), and the length u know! u can easy find it in exe file... so it's hard :) to bruteforce it ;) I don't think that it is possible.. :)
sd333221 28. Sep 2006	Yes, I see, i thought it was a smart one, because you mentioned brute forcing ;-)
Kostya Author 28. Sep 2006	hm.. i said brutforcing.. I meant to brute some parts of it, if u cant reverse it.
Kostya Author 01. Oct 2006	Plz, vote, so i will see what do u think about it... It's boring!?
ratsoul 08. Nov 2007	Another nice crackme... solved :)
Kostya Author 11. Nov 2007	WoW... ! :) U did it!!!

Kostya's Mini-Crypto Math SerialMe

Download MiniKeyMe.zip, 3 kb (password: crackmes.de)
Browse contents of MiniKeyMe.zip

..plz, view readme file!!
_______________________________________________

Type of protection: Serial

Rulez are the same:
-. Try to write a bruter (if u can brute it)
-. No patching! Ok!? :) (or loaders)
-. Find correct Serial & enter it to see messageBox :)
-. Plz, write a tutorial! :)

_______________
U already did it?!
plz pm, me or mail me: kostya@mail.vu

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 07. Oct, 2006
Downloads: 548

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Solutions

Solution by aluigi, published 24. apr, 2007; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

Kostya Author 07. Oct 2006	very easy, for newbies :)
DaBookshah 07. Oct 2006	Interesting. It's easier to keygen than it looks i think, have a go at it later. A harder problem would be if the hard-coded text for the second half of the serial was the encoded version of the first half. might not have any solutions though.
Kostya Author 08. Oct 2006	It is easy to find the correct key, I made it specially for this, so if I'll change some conditions in algo, nobody will find the correct key.
DaBookshah 08. Oct 2006	Ok, admittedly its midnight here, but if my head is still working, the problem is to: <img src="http://users.tpg.com.au/adslm66g/latex.png"> We know the ai's, and the xi's are the input bytes....but brutforcing might take a while, I wonder if theres a smarter way.
DaBookshah 08. Oct 2006	Oh right, when it said html will be left as-is, it meant.....not shown. That's sorta confusing.
Kostya Author 08. Oct 2006	Yeah! Ur image is real to this problem!!! So i'm interested in your ways of solving it. Brute!? :)
crp- 09. Oct 2006	hmm, you are sure there are non bruteforce methods to solve this?
DaBookshah 09. Oct 2006	Yeah, I am thinking the same thing. Probably not.....
Kostya Author 09. Oct 2006	I think it's clear, that there are no non-brute methods to solve it. Try to brute it, if u can do it!
Kostya Author 11. Oct 2006	Thank u for trying this crypto math algo! Nobody will! It's hard as i think!
macabre 12. Oct 2006	Do you have a valid serial for this? It would seem to me that if the check is an OR EAX,EAX...JNZ then EAX would have to be 0 for it to work...and the only way to do that is to have the value of EAX rollover.... no?
upb 13. Oct 2006	or eax, eax sets the zero flag when eax == 0 jnz jump if zero flag not set so the jump is taken when eax != 0
macabre 17. Oct 2006	Yes but if I'm not mistaken we do not want it to take the jump. If we take the jump it sets the retun eax to 0 and we want it to set it to a 1. So in our case for success we need it to be a zero...correct?
Anasazi 19. Oct 2006	I know this was'nt what you're looking for; Offset: 00401075 Old Bytes : 77 18 New bytes: EB 27 ^_^
Kostya Author 20. Oct 2006	macabre, if u want to understand the algo, enter somthing like "12345" & just trace it with Olly, and u'll see everything u'll need to see! ;) 12345 <-- it's wrong code as u can see :)
macabre 20. Oct 2006	Kostya, I think understand the algo. It didn't seem very difficult it was the end comparison that I wasn't understanding how that would work. After you add the computed bytes together you then do an OR operation which I believe needs to be zero. My confusion comes from several ADDs that become 0... rollover?
Kostya Author 23. Oct 2006	Yep! U r right! :) I Think that everything seems to be clear from this image http://users.tpg.com.au/adslm66g/latex.png

Kostya's My Simple KeyGenMe#1

Download KeygenMeNo1.zip, 12 kb (password: crackmes.de)
Browse contents of KeygenMeNo1.zip

It's really easy..
1). To start searching a key for your name, you need to patch something to enter
more than 1 symbol, (Patch it to 80 symbols) (no jne, je, & etc jump patching.)

2). Find key generator solution, and write a keygen

3). Patch it, to stop closing after the registration procedure
(not allowed to patch jne, je, & etc "jump patching". (e.g: "jne" -> "je")

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 10. Jul, 2006
Downloads: 1244

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by cyclops, published 22. jul, 2006; download (27 kb), password: crackmes.de or browse.

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Discussion and comments

TQN 10. Jul 2006	I think this crackme have a bug. ECX was changed after the call GetWindowTextLengthA at 00401106. So the value of ECX will be a random value after the call, and the hash function at 004012CA will return a random value of ECX too. Regards,
zairon Moderator 10. Jul 2006	A new version of the file has been updated. Problem should be fixed now.
m@rio_crk 10. Jul 2006	Is this a bug?: .text:0040118B push offset dword_40321C .text:00401190 push offset dword_403218 .text:00401195 call sub_401278 Inside this call: .text:0040127F mov eax, [ebp+arg_0] .text:00401282 mov ebx, [ebp+arg_4] eax and ebx holds the offset value, not the 'hash' value, so the serial depends not on the name but on the offsets. I think it's a bug.. I hope you think that too ;)
Ox87k 10. Jul 2006	Here is my kgn in C (only exe obviosly) Works fine on my machine, h*tp://rapidshare.de/files/25487085/kgn.zip.html Sorry but i'm too lazy to write a solution :P btw good j0b Kostya, i hope to see another keygenme, more hard than this ;) !
TQN 11. Jul 2006	Sorry Kostya, but your crackme crashed on my Win2000. The EBX register was changed in DlgProc. We need push EBX on the stack before we can use it. We should not modify EBX, ESI, EDI register. Regards,
Kostya Author 11. Jul 2006	Oh, Damn! Misprints... no need in offset values in this func... :(.. .. Ox87k, Thanx for keygen... :) to TQN: It was my first keygenme. I'll try to fix these problems in my second crackme. Thanks again!
unicorn 22. Jul 2006	The Solution by yzhr is not workin for me!!!. 0x87k's and cyclops's solutins are working fine. Plz check it....
zairon Moderator 22. Jul 2006	Yes, unicorn you are right. Thanks for pointing it out. Solution removed, waiting for a fix by yzhr.
Kostya Author 22. Jul 2006	I think it is becauze he made it before correcting my bugs..
Crosys 09. Sep 2006	Too easy keygenme Kostya =)

krackz's krax's keygen me

Download kraxMeKeyGen.zip, 12 kb (password: crackmes.de)
Browse contents of kraxMeKeyGen.zip

I wrote this in C and If you can find the 5 numbers you can see the source code.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 06. Dec, 2007
Downloads: 453

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Discussion and comments

Tgolyi 07. Dec 2007	I've found a lot of right 5 numbers, but i still can't see source code. what's wrong?
Zaphod 07. Dec 2007	I have found 5 numbers which ought to work, I get the response "Try using <numbers> with the zip". But that doesn't help. I cannot unrar the file kraxMeSource.rar - have I misunderstood something?
TiGa 07. Dec 2007	A unique serial was expected by the author. It looks like the crackme doesn't agree.
krackz Author 07. Dec 2007	your supose to enter it like this number1:number2:number3:number4:number5
Zaphod 07. Dec 2007	Where should we enter it?
halsten 07. Dec 2007	In the RAR package that you downloaded. The package is password-protected. So use those numbers to open the package folder.
Zaphod 07. Dec 2007	I have tried that ( of course ), but it doesn't work :(
jE! 08. Dec 2007	IF input numbers range is 0-997, then work on crackme can be continued..
Zaphod 08. Dec 2007	I have finished work on the crackme, I found a good set of 5 numbers, but I can´t get to the source. Things go like this: 1. Download kraxMeKeygen.zip 2. This file spawns kraxMe.exe and kraxMeSource.rar 3. When I doubleclick kraxMeSource.rar and want to use my 5 numbers, there is no way I can do that. The rar-program doesn't ask for a password. I can enter a password somewhere, but that is just for adding new files. So we need an explanation from krackz :)
TiGa 08. Dec 2007	There is only one possible password for a rar file. The author expected the crackme to have only one possible serial. It happens that there is many possible serials so they don't all work for the rar file, only one. If you really really really want to see the source, try them all one-by-one.
jE! 08. Dec 2007	he-he, of course, i wont see source of these simplest thing. btw, minimum 11mln serials can be.. so trying them all one-by-one is challenge? or some trick there, author?
Zaphod 08. Dec 2007	Tiga, like jE I'm not dying to see the source, but I WOULD like to know how to input a password in a rar-file? I don't see a way...
jE! 08. Dec 2007	when you will try to open it by WinRAR, program asks for password.
Zaphod 09. Dec 2007	It doesn't ask for a password on my computer. Very strange...
-Lord Virus- 15. Dec 2007	I have the same problem. It asked for a password, in WINrar.

kratorius's Exceptional

Download exceptional.zip, 11 kb (password: crackmes.de)
Browse contents of exceptional.zip

My first "serious" crackme

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. Mar, 2003
Downloads: 2174

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Solutions

Solution by zairon, published 09. jul, 2003; download (2 kb), password: crackmes.de or browse.

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kratorius's Imagination

Download Imagination.zip, 14 kb (password: crackmes.de)
Browse contents of Imagination.zip

I just hope that the idea will be glad to you, it's not the "usual" username/serial, this time you'll have to work with other things too (who said images? eheh).
I dunno how to rate it, but I think is at least 5.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 12. Sep, 2004
Downloads: 1639

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Solutions

Solution by +Pumqara, published 14. sep, 2004; download (12 kb), password: crackmes.de or browse.

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Solution by TaGaDaPaF!, published 14. sep, 2004; download (47 kb), password: crackmes.de or browse.

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Solution by kao, published 14. sep, 2004; download (72 kb), password: crackmes.de or browse.

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kratorius's KratMe

Download kratme.zip, 3 kb (password: crackmes.de)
Browse contents of kratme.zip

Make appear the congratulations messagebox

Difficulty: 7 - Very hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. Sep, 2003
Downloads: 1537

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Solutions

Solution by harlequin, published 12. sep, 2003; download (2 kb), password: crackmes.de or browse.

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cyclops Moderator 11. Mar 2009	No Generator(Base Point)? Will try after my vacation ;)
ksc91u Author 11. Mar 2009	No base point in keyval. You could try to patch keyval, decrypt dll.enc whatever you like. Though a keygen, or telling me that it is difficult to have one, would be nice.
ksc91u Author 30. Mar 2009	I found this pretty stupid. PB=pvG You can find a random point act as G', and generate a PB'. Such that rPB' = pv * r * G' Send rG', encrypt with rPB'. Still can be decrypted with pv. XD

ks@il's Crackme #1 by Ks@il

Download Crackme_#1_by_Ks@il.zip, 255 kb (password: crackmes.de)
Browse contents of Crackme_#1_by_Ks@il.zip

My first Crackme . Compress with NsPack . You must find register cod for user "Qwerty" .

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 23. Mar, 2007
Downloads: 545

Rating

Votes: 4
Crackme is boring.

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Solutions

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Discussion and comments

haggar 23. Mar 2007	I don't know is this a level 3 because pass can be fished. So it would be level1 by the rules since keygen isn't needed.
del86 23. Mar 2007	haggar, in about of this crackme says that use only disasm, not debuggers.
BieX 24. Mar 2007	where does it tell you to use disasm only? Uhm..haven't seen easy crackmes like these being called "getting harder" before.. the compressor does nothing to hide the vital information either.
BieX 24. Mar 2007	Btw, great to have you here ;) Always lovely to see new crackme makers.
ReDucTor 26. Mar 2007	It says disasm only in about page, but still I would agree with difficulty rating, because even without using debuggers its not too complex when you have signatures for the functions and can find out what its doing in Delphi
Adjiang 02. Apr 2007	Found something interesting here...,it's not easy one :D

ks@il's KeyGenMe #1

Download keygenme.zip, 250 kb (password: crackmes.de)
Browse contents of keygenme.zip

Rules:
Make a keygen that fully works.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 27. Jun, 2007
Downloads: 722

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Solutions

Solution by Encrypto, published 02. jan, 2008; download (189 kb), password: crackmes.de or browse.

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Discussion and comments

Aaron 16. Jul 2007	This was quite fun.

ksydfius's Aurora Borealis

Download aurora_borealis_ksydfius.zip, 1094 kb (password: crackmes.de)
Browse contents of aurora_borealis_ksydfius.zip

read the readme

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 26. Mar, 2013
Downloads: 225

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by Matteo, published 29. jul, 2015; download (1012 kb), password: crackmes.de or browse.

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Discussion and comments

hepL3r 28. Mar 2013	This can not be unpacked without brute forcing or a valid key,you are using 2xMD5 and also you are using this to decrypt the main exe so without a key or brute force it's impossible to be unpacked, here is your main check code: private void button1_Click(object sender, EventArgs e) { string text = this.textBox1.Text; string str2 = this.md5(this.md5(text)); if (this.md5(this.md5(text)) == "200FA8DEDF693586BA939BD5E3DF8845") { byte[] key = this.md5asBytes(text); byte[] buffer2 = this.sha256(text); byte[] data = Resources.Aurora_Borealis_Crackme; data = this.decrypt(data, buffer2); byte[] bytes = Encoding.Default.GetBytes("\x00e9\"3\x00c2\x000e\x00b8\x00f1\x00c6\x00ff\x00e5\x0005\x00be\x00de\x001f'\x00e9\x00eb% \x00ce\x0017\x00b4\x00cb\x00aa\x00d6\x00f8\x0012\x00b2ƒ"); bytes = this.decrypt(bytes, key); try { Form ownedForm = (Form) Assembly.Load(data).CreateInstance(Encoding.Default.GetString(bytes), true); base.AddOwnedForm(ownedForm); base.Hide(); ownedForm.ShowDialog(); Application.Exit(); } catch (Exception) { MessageBox.Show("This is not supposed to happen...", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation); } } else { MessageBox.Show("Invalid password!", "Wrong!", MessageBoxButtons.OK, MessageBoxIcon.Hand); Application.Exit(); } }
ksydfius Author 28. Mar 2013	Hi hepL3r, You have to think a little outside the box for this one... Take another look at the code... -ksydfius
Noteworthy 28. Mar 2013	Seems unsolvable if we have to crack the double md5;. otherwise I tried to use same "keys" used to make buffer2 and 3 for the first run which are ".NET Protectorksydfius" and ".NET Protector Version 1.0" still not working
Noteworthy 28. Mar 2013	do we have to crack the xor based encrypted key ? "é"3Â¸ñÆÿå¾Þ'éë% Î´ËªÖø²ƒ"
adwi32 28. Mar 2013	didnt look to this crakme but if u say its not possible to unpack its wrong. If program using key to unpack, thats mean its possible to get this key.
Noteworthy 29. Mar 2013	Its upacked I was talking about the correct password !
ksydfius Author 29. Mar 2013	Can someone please lower difficulty to a 4? I think a 6 is too high... Thanks
Delirium 05. Apr 2013	Just bypass the loader, simple.
Delirium 05. Apr 2013	Oh the crackme is the loader itself.
Delirium 05. Apr 2013	Loader bypassed, ollydbg check bypassed.
jhon 13. Apr 2013	OK, All chargers bypassed. Now to get "Wow! Please write a solution for crackmes.de!" Regards ;D
Matteo 09. May 2015	Part 3 is a nightmare! Any hints? Awesome crackme!!! today i was jumping here and there and i found this... i have solved part 1 and 2 (part 2 was my idea for new crackme, uff I'm not the only one who thought this) problem now is part 3... i'm not going to reverse all that (not sure if it is possible) and i'm not sure i will try to bruteforce 16 chars (max) pw. this is the best of part 3: Q29uZ3JhdHVsYXRpb25zIHlvdSBjYW4gZGVjb2RlIGJhc2U2NCE= Congratulations you can decode base64!
Matteo 09. May 2015	someone has any tips? here some strings from the crackme: You are on the wrong track. the northern lights Don't even try to break this encryption :) This is where you should be looking... or is it? ksydfius Congratulations you can decode base64! Too bad that won't help you on this one :( Stop looking at my code please... You are in the wrong direction... supposing that i don't have to look at the code (which is long and complex) what should i look?
Matteo 16. May 2015	S O L V E D ! ! ! this was the most difficult crackme that i have ever found i'm a genius eheheh you should try it!! now i need to make a tutorial but i will need much much time for this as it is long and difficult again you should try it!!
SinaDiR 18. May 2015	I'm stuck on part3 ! that was huge to spend time !
Matteo 17. Jul 2015	solution uploaded now... a bit late but i had not much free time and i played poliCTF 2015 :) my first ctf :)
Matteo 29. Jul 2015	have fun with this solution, i hope you like it! author says that "crunch" function and the "UnzipTheKey" function, together is AES encryption. So seems that i cracked AES... i will search for more info

ksydfius's Crypto Machine III: Bad OTP

Download Crypto_Machine_III.zip, 36 kb (password: crackmes.de)
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A good example of a bad practise...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 07. Apr, 2013
Downloads: 146

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Votes: 3
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Solutions

Solution by phueghy, published 03. sep, 2013; download (2 kb), password: crackmes.de or browse.

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ksydfius's Crypto Machine II: Stronger Algorithm?

Download Crypto_Machine_II.zip, 37 kb (password: crackmes.de)
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All you have to do is decrypt the cipher text

... but now, you will have to obtain the key from analysing a pair of corresponding plaintext and ciphertext

Enjoy

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 07. Apr, 2013
Downloads: 147

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Solutions

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tiber 26. Oct 2013	Harder than the first? Or was it easier since you had plaintext and ciphertext samples? Anyway, please write a tutorial !
ksydfius Author 28. Oct 2013	nice work, tiber!

ksydfius's Crypto Machine I: Weak Algorithm

Download Crypto_Machine_I_-_ksydfius.zip, 36 kb (password: crackmes.de)
Browse contents of Crypto_Machine_I_-_ksydfius.zip

Just decrypt the cipher text ...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 07. Apr, 2013
Downloads: 153

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Votes: 3
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Solutions

Solution by phueghy, published 03. sep, 2013; download (3 kb), password: crackmes.de or browse.

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ksydfius Author 07. Oct 2012	hmm... anyone finished this one yet?
phueghy 15. Oct 2012	After some tinkering I managed to calculate a valid plaintext that will generate the correct hash. It consists of unprintable chars: "þÜº/üA¢ô" I'll try to whip up a solution soon.

ksydfius's Ksydfius Crackit I

Download ksydfius1.zip, 1 kb (password: crackmes.de)
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A little crackme which can be solved in 1 sec
(if u know what it is doing...)

not very hard, just some ASM code and bitwise operations

-ksydfius

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 05. Sep, 2012
Downloads: 309

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by ThePoolGuy, published 02. oct, 2012; download (3 kb), password: crackmes.de or browse.

ThePoolGuy has rated this crackme as awesome.

Solution by freesoul, published 14. sep, 2012; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

mausy131 05. Sep 2012	First it didn't run.. Just open it in olly and you are able to crack it
cyclops Moderator 05. Sep 2012	^^It runs perfectly on my machine. Please note: There is no user input as such. You have to modify the code/data (you will see where and what to modify in the disasm) itself to get the good boy msg.
bearchik 06. Sep 2012	Key: 25 75 52 74 05 76 33 72 0E 31 73 52 For solved this crackme need substitute in function's argument value that use in compose. Example: .text:004010D0 pop eax ; in eax part key .text:004010D1 call sub_401091 ; function calculating key .text:004010D6 cmp eax, 19496E48h ; cmp with true value .text:004010DB jnz short loc_40111C Enter in eax 19496E48h before call result == 25755274h Enter in eax 25755274h before call result == 19496E48h Repeat this in all other call.
cyclops Moderator 06. Sep 2012	bearchik: dont spoil the phun. (I have removed the second comment).
ksydfius Author 06. Sep 2012	its very easy to solve, yes sorry to say, but ur key is incorrect although it generates the correct results at the CMP, it doesnt decrypt the goodboy message and, do u understand why that happens when u said: Enter in eax 19496E48h before call result == 25755274h Enter in eax 25755274h before call result == 19496E48h
freesoul 06. Sep 2012	Hey, I'm taking a look at your crackme, I reversed your first functions and I wonder why I get this: Test reverseBits(0x0E86CECE) output: 73736170 ("pass" just for test) Test _decode(0xF8BC9898) output: 73736170 Test decode(0x2F4F5D4C) output: 13736170 <- Actually idk why that 1 I guess solution is on understanding that '1', I'll dig deeper when I've time, greets :)
ksydfius Author 06. Sep 2012	hi freesoul, there are multiple passwords that will work at the CMP, but only 1 will successfully decrypt the goodboy message i can tell u that so far, u seem to be on the right track, but this bit: f(0x2F4F5D4C) = 0x13736170 isnt very important :) also, keep in mind that the password consists of chars in the range 0x20 to 0x7B and that it makes sense good luck :)
_sid 06. Sep 2012	ThE_CoDe_Is: ... well won't spoil this :) Nice & fun.
ksydfius Author 06. Sep 2012	hehe, good job :D my next ones will be more interesting :)
redoC 07. Sep 2012	I can't get it. What is the 12 byte serial?
freesoul 07. Sep 2012	Ow finally I got it lol. I didn't even look at the second part of the crackme, I prefered to permute 2^6 :)
ksydfius Author 07. Sep 2012	hey redoC, this probably isnt as hard as u think just analyze the code a bit, you'll find it :) good luck!
pegazuz 10. Sep 2012	well i figured some of the message but some letters are not readable. any clue?
freesoul 10. Sep 2012	pegazuz: analyzte loop by loop, then change what you've to change :)
ksydfius Author 10. Sep 2012	if u have some of the message then u are very close... just try it some more, u will get it ;)
pegazuz 13. Sep 2012	you were right :) just using the fact u need ascii :) should i post the passkey?
ksydfius Author 13. Sep 2012	nah, write a tutorial instead ! :)
ksydfius Author 14. Sep 2012	freesoul, nice solution! u understand what the crackme is doing and explain very well the loader is a nice one, too thx :)
_sid 14. Sep 2012	hmm, there's nothing to guess or brute; if you revert the ops, you will get the right solution ...

ksydfius's Ksydfius Encryption

Download ksydfius5.zip, 25 kb (password: crackmes.de)
Browse contents of ksydfius5.zip

Read the readme :) that should be enough to get you started...

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 05. Oct, 2012
Downloads: 208

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ksydfius Author 20. Oct 2012	anybody working on this?
mausy131 20. Oct 2012	Well i don't know anything about encryption. Still new to reverse engineering :)
redoC 08. May 2015	Has this one real solution? Here is encryption in C-code: //////////////////////////////////////////////////////// char* Encrypt (char plaintext, char key) { unsigned char bit_shift; int i, index = 0; for (i = 0; i < strlen(key); i++) index += key[i]; index = index % 32; for (i = 0; i < strlen(plaintext); i++) { plaintext[i] += key[index]; bit_shift = key[index] % 8; if ((plaintext[i] % 2) == 0) { plaintext[i] = (BYTE(plaintext[i]) >> bit_shift) \| (BYTE(plaintext[i]) << (8 - bit_shift)); // bit swap index = BYTE(plaintext[i]) % 32; } else { plaintext[i] = (BYTE(plaintext[i]) << bit_shift) \| (BYTE(plaintext[i]) >> (8 - bit_shift)); // bit swap index = BYTE(plaintext[i]) % 32; plaintext[i] += 1; } } return plaintext; } //////////////////////////////////////////////////////// Crackme is bit confusing because this is more hash function than cipher. There's no straightforward decryption algo because even with known key there's ambiguity decision which bit swap to use. Also if we look at algo, ciphertext should not contain any zero bytes!? ...anybody working on this?

ksydfius's Reverse My Algo

Download ksydfius7.zip, 1 kb (password: crackmes.de)
Browse contents of ksydfius7.zip

ASM crackme.

Reverse the algo and find the pass :)

Enjoy!

-ksydfius

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 21. Nov, 2012
Downloads: 850

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Discussion and comments

mausy131 22. Nov 2012	Nice one. Working on it :)
terraNova 23. Nov 2012	easy as told, but nice work!
lheer 26. Nov 2012	Good job That is correct!
audit 27. Nov 2012	That is correct!
Borgiman 28. Nov 2012	I hope someone is writing a tut, i'm too dumb to solve this myself :P
Kempniu 14. Dec 2012	Newbie here. Trying to solve this one, wrote a solver which generated a key that passes 3 of 4 checks and my last value only differs from the valid one by 1 bit (I get 5A74AC33 instead of 5A742C33). My suspicion is that I cannot simply reverse the RORs and XORs as the values in memory after the region checked by the crackme depend on the key provided, so I don't know what the memory contents for reversing are without the proper key. Any hints?
lemc 14. Dec 2012	I have solved this one by trial and error but by reversing the algo at: 00401028 and entering random data each time I noticed certain letters always wound up in the same spot after decryption. I tried multiple phrases and finally got the solution. I want to make my first ever tutorial for the community but dont know the sure shot method of getting the answer without trial and error. Hopefully ksydfius or anyone else can help me a little since i did infact get the solution. Thank you for the fun excersise ksydfius!
terraNova 15. Dec 2012	Wrote a solution and submitted it (23. Nov), but it's still not checked by a moderator.
Fresco 16. Dec 2012	i made the equivalent to c++; #include<iostream> #include<stdlib.h> #include<fstream> typedef unsigned char byte; using namespace std; unsigned char rotateright( unsigned char v, unsigned char x ); unsigned int int_rotateright( unsigned int v, unsigned char x ); void function_one( ); void function_two( int esi ); void hex_dump( ); void data_dump( ); char start_arry[]={ 0x64, 0x61, 0x74, 0x61, 0x2E, 0x74, 0x78, 0x74, 0x00, 0x47, 0x6F, 0x6F, 0x64, 0x20, 0x6A, 0x6F, 0x62, 0x00, 0x54, 0x68, 0x61, 0x74, 0x20, 0x69, 0x73, 0x20, 0x63, 0x6F, 0x72, 0x72, 0x65, 0x63, 0x74, 0x21, 0x00, 0x57, 0x68, 0x61, 0x74, 0x41, 0x72, 0x65, 0x59, 0x6F, 0x75, 0x44, 0x6F, 0x69, 0x6E, 0x67, 0x3F, 0x00, 0x54, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; char filename=start_arry, wayd=start_arry+0x23, data=start_arry+0x38; int main (){ ifstream data_txt( filename ); if( data_txt.good()==false ){ cout << "File does not exist!"; system("pause"); return 0; } data_txt.seekg(0, ios::beg); data_txt.read(data, 0x10); data_txt.close(); function_one(); function_two( 0x12 ); function_two( 0x23 ); function_two( 0x38 ); function_two( 0x23 ); function_two( 0x12 ); int data_comparson = reinterpret_cast <int>( start_arry+0x38 ); if( data_comparson[0]!=0xCD4558AD ){ cout << "Wrong code!"; system("pause"); return 0; } if( data_comparson[1]!=0xF7D5C9DB ){ cout << "Wrong code!"; system("pause"); return 0; } if( data_comparson[2]!=0x33C57B08 ){ cout << "Wrong code!"; system("pause"); return 0; } if( data_comparson[3]!=0x5A742C33 ){ cout << "Wrong code!"; system("pause"); return 0; } data_comparson = reinterpret_cast <int>( start_arry+0x12 ); data_comparson[0]-=0x42ED41AE; data_comparson[1]-=0xB6DFFEA1; data_comparson[2]-=0xFA050ABE; data_comparson[3]-=0x6B43746C; cout << "Title = " << start_arry+0x9; cout << "Body = " << start_arry+0x12; system("pause"); return 0; } void function_one( ){ int esi=0x23, edi=0x38; unsigned char al=1; while( 1 ){ al=start_arry[esi]; if( al==0 ){ break; } al = rotateright( al,3 ); start_arry[edi]=start_arry[edi] ^ al; esi++; edi++; } return; } void function_two( int esi ){ int eax=0, ecx=0, i=0; int int_arry = reinterpret_cast <int>( start_arry+esi ); while( 1 ){ eax=int_arry[i]; if( eax==0 ){ break; } eax=eax^0x7671295A; ecx=eax; ecx= int_rotateright( ecx,5 ); ecx=ecx+0xBADC0DED; ecx= int_rotateright( ecx,5 ); int_arry[i]=ecx; i++; } return; } unsigned char rotateright( unsigned char v, unsigned char x ){ int i=0; loop: if( i==x ) return v; i++; unsigned char temp = v & 1; // extract the low bit v >>= 1; // shift right v \|= ( temp<<7 ); // put the previous low bit in the high bit goto loop; } unsigned int int_rotateright( unsigned int v, unsigned char x ){ int i=0; loop: if( i==x ) return v; i++; unsigned int temp = v & 1; // extract the low bit v >>= 1; // shift right v \|= ( temp<<31 ); // put the previous low bit in the high bit goto loop; }
terraNova 17. Dec 2012	http://pastebin.com/RiW5xbqk - Here is my solution if you guys are interested (Code to obtain the key and a quick description how i got there).
nekrobunny 17. Dec 2012	many keys that pass the check: 20 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 24 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 25 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 26 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 27 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 41 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 42 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 43 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 4c 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 58 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 59 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 5a 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 5b 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 5d 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 5e 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 5f 7d 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 91 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 92 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 93 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d 9c 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d a8 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d a9 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d aa 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d ab 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d ad 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d ae 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d af 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d b0 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d b4 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d b5 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d b6 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d b7 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 6 b7 7e 66 61 6c dc 79 73 69 6b 25 ba 68 69 83 0d and many more...
lemc 20. Dec 2012	Nice work on the solutions! When I solved it myself it was "ureallylikethis" (without quotes) in the data.txt file.
Fresco 20. Dec 2012	yeah! it's really strange because my solution is: Seal\ysik%chis. and it works! #lemc How did you figure out "ureallylikethis" solution? here's how i did mine: 1) place a breakpoint before the checks. 2) replace the generated bad code with the correct code (form the checks) 3) the result should be something like the byte memory array in the decryption algo below; here's the c++ decryption algo: #include <iostream> #include <stdlib.h> #include <fstream> typedef unsigned char byte; using namespace std; byte memory[]={ 0x64, 0x61, 0x74, 0x61, 0x2E, 0x74, 0x78, 0x74, 0x00, 0x47, 0x6F, 0x6F, 0x64, 0x20, 0x6A, 0x6F, 0x62, 0x00, 0x02, 0xAA, 0x4E, 0xB7, 0xC1, 0x67, 0x53, 0xD7, 0x21, 0x7A, 0x77, 0x6C, 0xD1, 0xD7, 0xB7, 0x8C, 0x40, 0x5E, 0xDA, 0x4A, 0xA9, 0x5E, 0x1E, 0x7A, 0x5B, 0x5A, 0x47, 0x0E, 0x0D, 0x7C, 0x57, 0xA2, 0xFF, 0x7A, 0x36, 0xC9, 0x96, 0x9E, 0xAD, 0x58, 0x45, 0xCD, 0xDB, 0xC9, 0xD5, 0xF7, 0x08, 0x7B, 0xC5, 0x33, 0x33, 0x2C, 0x74, 0x5A, 0x0B, 0x22, 0xD3, 0x63, 0xB7, 0x87, 0xB9, 0x7C, 0xF4, 0xCA, 0x00, 0x00, 0x00, 0x00 }; char* filename_char = reinterpret_cast <char> ( memory+0x00 ), title_char = reinterpret_cast <char> ( memory+0x09 ), text_char = reinterpret_cast <char>( memory+0x12 ), data_char = reinterpret_cast <char> ( memory+0x38 ); byte key_byte = reinterpret_cast <byte> ( memory+0x23 ), data_byte = reinterpret_cast <byte> ( memory+0x38 ); int text_int = reinterpret_cast <int>( memory+0x12 ), data_int = reinterpret_cast <int> ( memory+0x38 ); byte ror8 ( byte x, byte times ); byte rol8 ( byte x, byte times ); unsigned int ror32 ( unsigned int x, byte times ); unsigned int rol32 ( unsigned int x, byte times ); void encryptstring(); void data_calculation ( byte offset ); void debug(); int main (){ text_int[0]+=0x42ED41AE; text_int[1]+=0xB6DFFEA1; text_int[2]+=0xFA050ABE; text_int[3]+=0x6B43746C; data_calculation( 0x12 ); data_calculation( 0x23 ); data_calculation( 0x38 ); data_calculation( 0x23 ); data_calculation( 0x12 ); encryptstring(); ofstream data_txt( filename_char ); if( data_txt.good()==false ){ cout << "File: " << (char)0x22 << filename_char << (char)0x22 << " is used by another application" << endl; system( "pause" ); return 0; } data_txt.seekp( 0, ios::beg ); data_txt.write( data_char, 0x10 ); data_txt.close(); cout << "Data was successfully written to: " << (char)0x22 << filename_char << (char)0x22 << "!" << endl; cout << "In order to make algo work you have to copy the generated file: " << (char)0x22 << filename_char << (char)0x22 << " alongwith the executable itself." << endl; system( "pause" ); return 1; } void encryptstring(){ byte al=key_byte[0]; for( int i=0; al!=0; i++ ){ al = key_byte[i]; al = ror8( al,3 ); data_byte[i] ^= al; } return; } void data_calculation ( byte offset ){ int raw_data = reinterpret_cast <int*> ( memory+offset ); for( int i=0; raw_data[i]!=0; i++ ){ raw_data[i] = rol32( raw_data[i],5 ); raw_data[i]-=0xBADC0DED; raw_data[i] = rol32( raw_data[i],5 ); raw_data[i]^=0x7671295A; } return; } void debug(){ for( int i=0; i<82; i++ ){ cout.width( 2 ); cout.fill( '0' ); if ( i%8==0 ) cout << endl; cout << hex << (int)memory[i] << " "; } cout << endl << endl; return; } byte ror8 ( byte x, byte times ){ byte temp=0; for( byte i=0; i<times; i++ ){ temp = x&0x01; x >>= 1; x \|= ( temp<<7 ); } return x; } byte rol8 ( byte x, byte times ){ byte temp=0; for( byte i=0; i<times; i++ ){ temp = x&0x80; x <<= 1; x \|= ( temp>>7 ); } return x; } unsigned int ror32 ( unsigned int x, byte times ){ unsigned int temp=0; for( byte i=0; i<times; i++ ){ temp = x&0x00000001; x >>= 1; x \|= ( temp<<31 ); } return x; } unsigned int rol32 ( unsigned int x, byte times ){ unsigned int temp=0; for( byte i=0; i<times; i++ ){ temp = x&0x80000000; x <<= 1; x \|= ( temp>>31 ); } return x; }
lemc 24. Dec 2012	#Fresco: Nice work on a c++ decrypter! What I did to get my "ureallylikethis"solution was to first inline the reverse of the algo under the main code. Then I tried 16 char long phrases such as the ones used in this program. I tried the following (from what I can remember cause there were other phrases): "is this correct?", "imdoingasolution" and "thatsthesolution". When the process finished the 16 chars of data that was left didn't work. Now even though the return values didn't work they all had a similar pattern of recurring chars in sequence. Such as "ally", "ike" and "his". After trying a few words together I got "ureallylikethis" but realized it was only 15 chars long. This is where luck comes in cause I wasn't going to try it but decided to for kicks and voila! It worked! Hope this helped you understand how I got my solution. If you really want I can remake my reverse algo solution in delphi + asm. Thanks again to everyone who helped me understand this program more with your solutions! And if you celebrate them, "Happy Holidays"!
[Wizzer] 24. Dec 2012	Got stuck a bit, almost same issue as Kempniu, but 2 bytes difference. I made a reverse algo, so when I put the whole data array from Olly (for some known input) it goes right to left and decrypts correctly. Problem is that when I take that data array, replace "key parts" with correct values from comparison, I can't get a valid key. As example, data.txt file has text HelloPeople12345 Before first comparison I see this result in Olly: 0x64, 0x61, 0x74, 0x61, 0x2E, 0x74, 0x78, 0x74, 0x00, 0x47, 0x6F, 0x6F, 0x64, 0x20, 0x6A, 0x6F, 0x62, 0x00, 0x02, 0xAA, 0x4E, 0xB7, 0xC1, 0x67, 0x53, 0xD7, 0x21, 0x7A, 0x77, 0x6C, 0xD1, 0xD7, 0xB7, 0x8C, 0x40, 0x5E, 0xDA, 0x4A, 0xA9, 0x5E, 0x1E, 0x7A, 0x5B, 0x5A, 0x47, 0x0E, 0x0D, 0x7C, 0x57, 0xA2, 0xFF, 0x41, 0x33, 0xC9, 0x0C, 0x6A, 0xCB, 0x98, 0x62, 0x84, 0x18, 0x8A, 0x96, 0x66, 0x0E, 0x75, 0xF4, 0x73, 0x65, 0x4E, 0x74, 0x5A, 0xFF, 0x0E, 0xD3, 0x63, 0x97, 0x81, 0xB9, 0x7C, 0x74, 0xD4, 0x00, 0x00, 0x00, 0x00 (I added 0x myself and last 4 0x00) I decided to use Fresco's decrypter for testing, after running this I got file containing HelloPeople12345, so it is ok, now I will replace "key" location bytes with known values (from comparisons): 0x64, 0x61, 0x74, 0x61, 0x2E, 0x74, 0x78, 0x74, 0x00, 0x47, 0x6F, 0x6F, 0x64, 0x20, 0x6A, 0x6F, 0x62, 0x00, 0x02, 0xAA, 0x4E, 0xB7, 0xC1, 0x67, 0x53, 0xD7, 0x21, 0x7A, 0x77, 0x6C, 0xD1, 0xD7, 0xB7, 0x8C, 0x40, 0x5E, 0xDA, 0x4A, 0xA9, 0x5E, 0x1E, 0x7A, 0x5B, 0x5A, 0x47, 0x0E, 0x0D, 0x7C, 0x57, 0xA2, 0xFF, 0x41, 0x33, 0xC9, 0x0C, 0x6A, 0xAD, 0x58, 0x45, 0xCD, 0xDB, 0xC9, 0xD5, 0xF7, 0x08, 0x7B, 0xC5, 0x33, 0x33, 0x2C, 0x74, 0x5A, 0xFF, 0x0E, 0xD3, 0x63, 0x97, 0x81, 0xB9, 0x7C, 0x74, 0xD4, 0x00, 0x00, 0x00, 0x00 and now run the application again, it generates file, copy file, rerun app in Olly, breakpoint at first comparison, data is: 64 61 74 61 2E 74 78 74 00 47 6F 6F 64 20 6A 6F 62 00 02 AA 4E B7 C1 67 53 D7 21 7A 77 6C D1 D7 B7 8C 40 5E DA 4A A9 5E 1E 7A 5B 5A 47 0E 0D 7C 57 A2 FF 41 33 C9 0C 6A AD 58 45 CD DB CA D5 F7 08 7B C5 33 33 2C 74 5A FF 0E D3 63 97 81 B9 7C 74 D4 and that key fails... What am I doing wrong? Could it be a byte at 0x34 affecting, the one that is hresult of CreateFileA (40107B)? (when I tried to decrypt data array that was in Fresco's sources - it worked, but can't get it working with my data)
lemc 25. Dec 2012	#Wizzer: That was my issue when I tried my own random data in the decryption routine I inlined. It wouldn't work with the decrypted data I got. I guess we just need to wait for ksydfius to post a working submitted solution or if not then hopefully a solution of his own so we can all understand the true decryption algo. Either way I had fun with it and hope to see a 100% solution!
[Wizzer] 25. Dec 2012	#lemc: Indeed, I've used a lot of efforts and no success, when I almost gave up and came here to see the solution, I was surprised that it was so "simple", I felt like I missed some crucial part and everything went upside down, but when I tried to test use decryptor provided here I realized that it doesn't work either. Main difference are the bytes just before the key and right after, some do repeat, but around 8-10 of those are different (have to open logs to see for sure). Those effect decryption algo and when I "inject" values from comparison into data set generated from, for ex. HelloPeople12345, it comes to 1-2 (sometimes 3-4) bytes difference after decryption anyway. So I made a bruteforcer for my decrypting algo, I was substituting only bytes that differ depending on data.txt content - 6 of those in the tail (I didn't touch leading bytes, some differ there too), I was comparing 10 bytes after key location to be zeros after 5 passes of decryption, if all are - high chance that I got correct values, I tried it in a small range (in the tail, last 4 changing (not just last 4 bytes)) bytes for test) for a valid data set (the data set that was generated from data.txt, but key locations are not substituted). As soon as I tried the small range - brute found correct 4 last changing bytes. Bruteforcing to all changing bytes would take a long time... my assumption was author's original idea wasn't bruteforcing, cause of the range to brute, so I left that idea aside for now. P.S.: it is funny, but when I read your solution "ureallylikethis", I could see letters that are part of it, so my own decrypting algo was trying to get exactly this key, when data.txt has default text, so input key was "Greetings crackm", I took that data set, inject key parts from comparison, I ended up having: WreallysikeІhism 0x57 0x72 0x65 0x61 0x6c 0x6c 0x79 0x73 0x69 0x6b 0x65 0xb2 0x68 0x69 0x73 0x6d 0x02 (!!!) as you can see, it looks very familiar, but doesn't work as input key (and actually it is 17 bytes long, trailing 0x02, remember that what I said that all bytes after keylocation+16 must be zeros? So this one is obviously a wrong key. It passes 3 of 4 checks and fails on last one: 5A73AC33 compared to 5A742C33 - 2 bytes difference. Not let's take a look at a data set for that key: 02 AA 4E B7 C1 67 53 D7 21 7A 77 6C D1 D7 B7 8C 40 5E DA 4A A9 5E 1E 7A 5B 5A 47 0E 0D 7C 57 A2 FF 42 33 C9 4F 66 AD 58 45 CD DB C9 D5 7 08 7B C5 33 33 AC 73 5A FB ED D3 63 77 6C B9 7C 34 D5 And this is a data set for "ureallylikethis": 02 AA 4E B7 C1 67 53 D7 21 7A 77 6C D1 D7 B7 8C 40 5E DA 4A A9 5E 1E 7A 5B 5A 47 0E 0D 7C 57 A2 FF 40 33 C9 57 66 AD 58 45 CD DB C9 D5 F7 08 7B C5 33 33 2C 74 5A BB 23 D3 63 F7 73 B9 7C 74 D4 10 bytes difference, including 2 bytes in key itself, now let me test my algo by feeding it latter dataset if I can get "ureallylikethis"... and I do get that 15 bytes length key, so algo does decrypt correctly: Thatiscorrect!WhatAreYouDoing?\ureallylikethis <-- 0x00 were removed, but here is a decrypted dataset that provides accurate view: 0x54 0x68 0x61 0x74 0x20 0x69 0x73 0x20 0x63 0x6f 0x72 0x72 0x65 0x63 0x74 0x21 0x00 0x57 0x68 0x61 0x74 0x41 0x72 0x65 0x59 0x6f 0x75 0x44 0x6f 0x69 0x6e 0x67 0x3f 0x00 0x5c 0x00 0x00 0x00 0x75 0x72 0x65 0x61 0x6c 0x6c 0x79 0x6c 0x69 0x6b 0x65 0x74 0x68 0x69 0x73 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 As I said 10 last bytes are zeros (11 here because key is 15 bytes) But I'm really looking forward a correct solution too :) According to IMHO (my lvl 1) point of view bruteforcing is required to get correct the key, that will make sure that last 10 bytes are zeros, 3 bytes before the key location are zeros and original texts (starting 403012) match, hresult byte 403034 can be ignored. That's all for now :) Thank you very much and happy holidays!
ksydfius Author 30. Dec 2012	ok, here is my solution: unsigned long func1 (unsigned long l){ return rol(rol(l, 5) - 0xBADC0DED, 5) ^ 0x7671295A; } void func2 (unsigned char data[], char string1[], int len, int len_string1){ for (int n = 0; n < len; n++){ unsigned char a = string1[n%len_string1]; a = ((a << 5) \| (a >> 3)) & 0xFF; data[n] ^= a; } } void Decrypt (unsigned char data[], int len, int offset){ unsigned long dword; for (int n = offset; n < len; n+=4){ dword = (data[n+3] << 24) \| (data[n+2] << 16) \| (data[n+1] << 8) \| data[n]; dword = func1(dword); data[n] = dword & 0xFF; data[n+1] = (dword & 0xFF00) >> 8; data[n+2] = (dword & 0xFF0000) >> 16; data[n+3] = (dword & 0xFF000000) >> 24; } } int main(){ unsigned char data[] = {0x02, 0xAA, 0x4E, 0xB7, 0xC1, 0x67, 0x53, 0xD7, 0x21, 0x7A, 0x77, 0x6C, 0xD1, 0xD7, 0xB7, 0x8C, 0x40, 0x5E, 0xDA, 0x4A, 0xA9, 0x5E, 0x1E, 0x7A, 0x5B, 0x5A, 0x47, 0x0E, 0x0D, 0x7C, 0x57, 0xA2, 0xFF, 0xA4, 0x34, 0xC9, 0x54, 0x66, 0xAD, 0x58, 0x45, 0xCD, 0xDB, 0xC9, 0xD5, 0xF7, 0x08, 0x7B, 0xC5, 0x33, 0x33, 0x2C, 0x74, 0x5A, 0xBB, 0x23, 0xD3, 0x63, 0xF7, 0x73, 0xB9, 0x7C, 0x74, 0xD4}; int len = 64; char* string1 = "WhatAreYouDoing?"; Decrypt(data, len, 0); Decrypt(data, len, 0x11); Decrypt(data, len, 0x26); Decrypt(data, len, 0x11); Decrypt(data, len, 0); unsigned char enc[16]; for (int n = 0x26; n < 0x26+16; n++) enc[n-0x26] = data[n]; func2(enc, string1, 16, 16); printf("%s\n", enc); getch(); }
ksydfius Author 30. Dec 2012	answer: ireallylikethis
[Wizzer] 02. Jan 2013	#ksydfius, thank you for your reply and Happy New Year :) I tried your source code with Fresco's rol32 function implementation, I can see "ireallylikethis" text output. My question is how did you get data[] byte content? What I did now: 1)copy-pasted ReadMe.txt as data.txt file, edited, now file has "Greetings crackm" text inside, no quotes and yeah, editing wasn't necessary, so I see that file is 16 bytes now 2)I run crackme in Olly, set breakpoint at first comparison at 4010F3 and binary copied 64 bytes starting at 403012 in memory dump 3)I added 0x and commas in front of each 4)pasted that data into your solution 5)replaced 16 bytes in that data starting at 0x26 (key location) with bytes that are used in comparison: 0xAD, 0x58 ,0x45, 0xCD, 0xDB, 0xC9, 0xD5, 0xF7, 0x08, 0x7B, 0xC5, 0x33, 0x33, 0x2C, 0x74, 0x5A 6)ran the application, btw I added to the end: FILE* f = fopen("data.txt", "wb"); fputs((char*)enc, f); fclose(f); 7)copy resulting data.txt to crackme's folder, run it in Olly with breakpoints set on first comparison 8)3 of 4 checks pass, one fails with 2 bytes difference That is what I wrote about in my previous post, that my reverse algo gives some near solution answer too, but not the solution. I have a feeling that not every input can be reversed to a correct key or I'm still missing something :) Could you please comment on this? Thank you!
ksydfius Author 02. Jan 2013	Wizzer, I think most of the bytes are constant, except for 2 or 3 that change depending on the input, so you will have to BF the bytes that change, then for each possibility decrypt the bytes The problem is the check routine is a bit loose, but you can narrow down the possibilities to find the correct one
[Wizzer] 02. Jan 2013	#ksydfius, I feel like there are more bytes needed to be brute forced, in one of my posts I already wrote that I made a small bruteforcer, but saw that range to brute was big and gave up that idea, but seems I was correct, that bruteforcing might be required. Another way to brute could be to randomize input key and see if decryption succeeds, but that brings us to a condition that one needs to be lucky to get the correct input in the first place :) To summarize, I think: 1)one has to be lucky with random input that would be correctly decrypted (byte difference will not affect key location) 2)bruteforce bytes that are different to meet decryption requirements So, imho, second option is the correct solution to that crackme, though range (imho again) might be large (and probably also depends on initial input). If there was a constraint that key must be only a-zA-Z then bruteforcing seems to be even more of a correct (and the only?) solution :) But anyway, thank you for the challenge :)
lemc 05. Jan 2013	#ksydfius: Wow, I was co close with my solution lol. Mine was "ureallylikethis" and your was "ireallylikethis". Thank you for posting your solution!
Fresco 07. Jan 2013	for me, the solution can be everything that passes the check, it's just a guesswork :D but fun after all :D as for Wizzer ... here's how i got the arry: place some random string in the data.txt file and the place a breakpoint before the checks, ... just copy / pase the hex vals, use my algo, and it'll return a valid key ... obviously i couldn't know what the creator of the algo had in mind and i labeled vals with eax ebx etc and it's kinda confusing, but if you analyse it i's the same thing, the second one is better than the first one :D
Fresco 08. Jan 2013	https://docs.google.com/folder/d/0B6cGfCmkO563S1NsTlVySUZVWlk/edit
[Wizzer] 12. Jan 2013	#Fresco, still no luck for me :) 0x64, 0x61, 0x74, 0x61, 0x2E, 0x74, 0x78, 0x74, 0x00, 0x47, 0x6F, 0x6F, 0x64, 0x20, 0x6A, 0x6F, 0x62, 0x00, 0x02, 0xAA, 0x4E, 0xB7, 0xC1, 0x67, 0x53, 0xD7, 0x21, 0x7A, 0x77, 0x6C, 0xD1, 0xD7, 0xB7, 0x8C, 0x40, 0x5E, 0xDA, 0x4A, 0xA9, 0x5E, 0x1E, 0x7A, 0x5B, 0x5A, 0x47, 0x0E, 0x0D, 0x7C, 0x57, 0xA2, 0xFF, 0x55, 0x33, 0xC9, 0x0C, 0x6A, 0xCB, 0x98, 0x62, 0x84, 0x18, 0x8A, 0x96, 0x66, 0x0E, 0x75, 0xF4, 0x73, 0x65, 0x4E, 0x74, 0x5A, 0xFF, 0x0E, 0xD3, 0x63, 0x97, 0x81, 0xB9, 0x7C, 0x74, 0xD4, 0x00, 0x00, 0x00, 0x00 put that into your algo, you will get HelloPeople12345, what is correct, now let's replace in that array "key" location bytes with bytes from 4 cmps: 0x64, 0x61, 0x74, 0x61, 0x2E, 0x74, 0x78, 0x74, 0x00, 0x47, 0x6F, 0x6F, 0x64, 0x20, 0x6A, 0x6F, 0x62, 0x00, 0x02, 0xAA, 0x4E, 0xB7, 0xC1, 0x67, 0x53, 0xD7, 0x21, 0x7A, 0x77, 0x6C, 0xD1, 0xD7, 0xB7, 0x8C, 0x40, 0x5E, 0xDA, 0x4A, 0xA9, 0x5E, 0x1E, 0x7A, 0x5B, 0x5A, 0x47, 0x0E, 0x0D, 0x7C, 0x57, 0xA2, 0xFF, 0x55, 0x33, 0xC9, 0x0C, 0x6A, /0xCB, 0x98, 0x62, 0x84, 0x18, 0x8A, 0x96, 0x66, 0x0E, 0x75, 0xF4, 0x73, 0x65, 0x4E, 0x74, 0x5A, / 0xAD, 0x58, 0x45, 0xCD, 0xDB, 0xC9, 0xD5, 0xF7, 0x08, 0x7B, 0xC5, 0x33, 0x33, 0x2C, 0x74, 0x5A, 0xFF, 0x0E, 0xD3, 0x63, 0x97, 0x81, 0xB9, 0x7C, 0x74, 0xD4, 0x00, 0x00, 0x00, 0x00 run, copy generated file, run crackme in olly, you will see that 3 of 4 checks pass, 1 fails with 1 byte difference (second check): F7D5C9DB compared to array's F7D5CADB
Fresco 31. Jan 2013	yes, bruteforce may be necessary ;)
loizos 03. Mar 2013	Hey guys :P i got a question >.> How you reverse a program in C ??? I am actually using 'ollydbg' to reverse my staff.So please any1 help?
loizos 31. Mar 2013	Hello i learned how to reverse program am now can crack programs with difficulty level 3.This one was very easy.I 90 the jmp and past the serial key so easy :)
[Wizzer] 08. Apr 2013	@loizos you missed the whole point here :) read the author's intro text again
Articstorm 02. Jun 2013	is it normal that i cant open the *.exe file? it just terminates! :(
Shivajitheboss 14. Oct 2015	I was able to patch it and get "That is correct !" message. But the problem I faced was the exe just wont start. Still working on it ;) Nice work bro.

ksydfius's Simple Ciph3r

Download ksydfius_simpleciph3r.zip, 33 kb (password: crackmes.de)
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It's just a very simple cipher.

Break it :)

[modnote]
the md5's plaintext has a short length, <=4 chars so brutable
[/modnote]

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 05. Oct, 2012
Downloads: 754

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Solutions

Solution by randomdude, published 10. oct, 2012; download (21 kb), password: crackmes.de or browse.

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Discussion and comments

llaauurriiss 06. Oct 2012	Are you sure that there are no errors in it? Because when i open it and type in the code it shows CMD window and creates file SimpleCiph3r_.exe...After that, nothing happens
randomdude 07. Oct 2012	You don't need to find the plaintext to the md5 (at least not the way I did it anyway). I'll submit a 'solution' once I finish working my way through the app it drops.. damn VB >.< :D
Xspider 10. Oct 2012	why did you choose "Unspecified/other" as the programming language it was made in while it was made in .NET!! or is it a fake sign?
ksydfius Author 10. Oct 2012	Xspider i chose "Unspecified/other" because its more than just 1 language plus its quite obvious what language i used, .NET + VB btw, the encryption algorithm used is very very famous... even in the 1600s !
SoN 01. Nov 2012	Writing the solution for this one now. Fairly straight forward.
[Wizzer] 21. Dec 2012	Solved! Thanks for the crackme :)

ksydfius's The XOR Algorithm :)

Download ksydfius2.zip, 2 kb (password: crackmes.de)
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cryptanalytic challenge

little overview:
----------------------
u have:
- 1 plaintext
- 1 corresponding ciphertext
- 1 algorithm that requires a key

ur goal:
- The plaintext has been encrypted with a key
- Your goal is to extract the key that encrypts the plaintext to the cipher text
- If you have done so correctly, the program will decrypt the goodboy message and tell u the answer :)

have fun!

-ksydfius

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 07. Sep, 2012
Downloads: 713

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by Reaper91, published 05. oct, 2012; download (40 kb), password: crackmes.de or browse.

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Solution by ThePoolGuy, published 14. oct, 2012; download (25 kb), password: crackmes.de or browse.

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Solution by whizz, published 19. sep, 2012; download (108 kb), password: crackmes.de or browse.

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Solution by bearchik, published 19. sep, 2012; download (4 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

bearchik 07. Sep 2012	At first I solved this algorithm hands, but then saw that there 240 byte and wrote the program. sciense_m00nlight
nwert 07. Sep 2012	easy one, science_m00nlight ;)
ksydfius Author 07. Sep 2012	congratulations! :D yes, too easy, the algorithm is very very weak :) maybe i should have made it so that u only have the ciphertext to make it a bit harder... oh well ;) btw moonlight is the song where i got that plaintext from
yolila 11. Sep 2012	Seriously, I have just finished my first crackme job. thank you, ksydfius!
archx 12. Sep 2012	im a complete noob to this, lol still suck on this. Any hints?
ksydfius Author 13. Sep 2012	u can do it by hand ;) no coding necessary very basic understanding of XOR is all u need
Dr. Cat 14. Sep 2012	We go about our daily lives understanding almost nothing of the world. Few of us spend much time wondering why nature is the way it is; where the cosmos came from;... why we remember the past and not the future; and why there is a universe.
andrewl.us Moderator 14. Sep 2012	Please submit a small tutorial, Dr. Cat.
nadav12456 17. Sep 2012	does the encrypted data is in the correct format? cause writing some decryprion script failed to match one letter foreach password letter
kingdeking 17. Sep 2012	Can you post a solution. I am very interested in it since I am stuck writing a decryption program. My problem is the way the encryption algorithm calculates its next offset k that is added after xor: k = (unsigned int)Result[i] % (unsigned int)32; //0x20 Since it is modulo 32 I fail to tell which "k" is associated with which "i" (obviously there are multiple i's to each k since the length of the encryption key is 240). Any tips?
nadav12456 17. Sep 2012	thats true, multiple i's, but... if you loop over the i's, there is only one k it was encrypted with, at the step of the ENCRYPTION, so ive recreated the encryption part, computing k, for each step, which is depends only on i, (given the encrypted data...)... then you can reverse the encryption stage... but, well, it didnt work, so maybe im missing something simple here, a bit annoying.
kingdeking 17. Sep 2012	Yes, I have done that at first aswell but I run into the same problems. Since you write Solution[k] now for every i you dont avoid generating the same k in different i-Iterations. You end up writing to Solution[k] multiple times.
kingdeking 17. Sep 2012	Or can you show me your code? Maybe I just miss something.
whizz 18. Sep 2012	Submitted a simple explanation and some Java code to generate key. #Lazy enough to do it by hand. :)
nadav12456 18. Sep 2012	kingdeking, it sould generate the same solution at each ime... but it doesnt, for me, so it strange... if i try encrypt something else, it does ok, python code: enc_data = [ord(i) for i in open(enc_data_path,"rb").read()] real_data = [ord(i) for i in "We go about our daily lives understanding almost nothing of the world. Few of us spend much time wondering why nature is the way it is; where the cosmos came from;... why we remember the past and not the future; and why there is a universe."] passw = [[] for i in range(0x20)] for i in range(len(enc_data)): mod_sum = sum([enc_data[j] for j in range(i)]) % 32 passw[mod_sum].append(((enc_data[i]-mod_sum) % (256)) ^ (real_data[i]%256))
kingdeking 18. Sep 2012	Allright I solved it. The truth is, even if we write multiple times to Solution[k] it doesnt matter because it will fill Buffer[k] just with the exact same content again. "Great job if you can read this message then you are well deserved :) The answer is sience_m00nlight" And the Ascii output in ollydebug is different from console output, retarded!
kingdeking 18. Sep 2012	Btw Nadav, I dont really get how you calculate your next k. All you have to do is: k = (unsigned int)Result[i] % (unsigned int)32; //0x20
nadav12456 18. Sep 2012	Damn, i havent noticed the xor ebx,ebx at the end of some function, made me think ebx (or k in your implementation) is sum of encrypted data up to the current index... so, it didnt work, ill try again, with some valid k... Nadav.
xmk99 19. Sep 2012	no plaintext and ciphertext found in the zip
kingdeking 19. Sep 2012	lmao. Its embedded in the executable of course.
ksydfius Author 19. Sep 2012	very nice tuts guys, thx!
SandboxEscaper 21. Aug, 21:40	Very nice crackme. I wrote this on the go while reversing should anyone be interested: http://thomas-vanhoutte.blogspot.be/2016/08/crackmesde-solutions-2-analysis-of-xor.html Its a bit chaotic and rushed towards the end, but maybe it is useful to someone ;). (ps: I'm really bad at math, so forgive the lack of fancy formulas)

ksydfius's The XOR Algorithm II

Download ksydfius3.zip, 2 kb (password: crackmes.de)
Browse contents of ksydfius3.zip

well my first edition of the xor algorithm was too easy
but perhaps that is because u know the position of the key
that is XORed with the plaintext?

anyway i have adjusted the algorithm with a simple modification :)

did this make the algo more secure?

:)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 19. Sep, 2012
Downloads: 403

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by morecode, published 16. dec, 2012; download (260 kb), password: crackmes.de or browse.

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Solution by ivvei, published 02. nov, 2012; download (2 kb), password: crackmes.de or browse.

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Solution by RandolphCarter, published 10. oct, 2012; download (581 kb), password: crackmes.de or browse.

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Solution by ThePoolGuy, published 02. oct, 2012; download (40 kb), password: crackmes.de or browse.

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Discussion and comments

kingdeking 19. Sep 2012	Hey, great job... seems like that change wasnt of much use ;) anyway the answer is cryptanalysis_ftw Enjoyed this one ;0
ksydfius Author 19. Sep 2012	wow, very fast :) good job!
ivvei 26. Sep 2012	I have a question: At 00401116 lea esi, dword ptr [403000], here is a string I think may be the key string which starts wih a "W", hex 57, but, 0040111C lea edi, dword ptr [4030F1], here is hardcoded with a HEX 87. Then mov them to al and cl, and cmp al, cl, and there is a JNZ which would surely be taken. It directly jump to the end of this program. So if the above I am not wrong, how could it possible to jump to 00401137 where has a key call?
ivvei 26. Sep 2012	I also tried the answer of "cryptanalysis_ftw", but it did not work. The successful scene seems to like this: pop out a messagebox contains a text of "Nice one!" Sadly, the string "cryptanalysis_ftw" did not get a "Nice one".
ksydfius Author 26. Sep 2012	lol the answer of "cryptanalysis_ftw" is just the answer you tell me :) not the input string for the crackme itself good job btw!
ivvei 26. Sep 2012	e... I still not get your point. Ok, forget about the "cryptanalysis_ftw", that is what kingdeking wrote and I do not know what does it mean. Maybe it is not important, forget about it.... Back to my queston at #3. I found the JNZ jump caused the programme end task and it seems happen before the input string located at 403264 comparing with the stored string which may be located at 403000. Is this a trap set by your intention and I should not stepped into?
ksydfius Author 26. Sep 2012	if im understanding you correctly, the JNZ is just to compare the result of your encrypted text and my encrypted text so if the one pair of corresponding bytes is not equal, then i will exit the program if all the bytes are equal, then the JE 401137 is taken if its still confusing, try debugging it with the correct input key to find out what it does
draww 27. Sep 2012	@ivvei: read 1st crackmes solutions. maybe you'd find out what's going on ;)
RandolphCarter 28. Sep 2012	nice crackme, i enjoyed analyzing it!
NukeCrack 07. Jan 2013	Patched by NukeCrack Time : 2min

ksydfius's What Is This???

Download ksydfius8.zip, 9 kb (password: crackmes.de)
Browse contents of ksydfius8.zip

Read the readme :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Nov, 2012
Downloads: 390

Rating

Votes: 7
Crackme is quite bad.

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Solutions

Solution by phueghy, published 24. dec, 2012; download (33 kb), password: crackmes.de or browse.

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Discussion and comments

congchuahoatuyet1997 28. Nov 2012	how to check????
idid231 04. Dec 2012	So i have to find its password and press a button or just find the password?
L0ngin0s 05. Dec 2012	My solution is 1.52061 ¿Is it possible?. Sorry for my bad English ;)
L0ngin0s 06. Dec 2012	Exactly 1.5206117639947453996940561267823061250557102935443782479396672938700617746736758676608778545506705188. I hope don't be wrong ;)
ksydfius Author 06. Dec 2012	Sorry but thats not right. Think a bit outside the box...
phueghy 07. Dec 2012	Is it even analytically possible to find a correct input value? As the algorithm is so sensitive on smallest changes of the input value I am a bit lost here.
fcktrl 18. Dec 2012	My solution "3231" Right? :)
ksydfius Author 19. Dec 2012	sorry, not right
phueghy 21. Dec 2012	My solution is "18975". The explaining document is still in the solutions pipeline. I was only able to bruteforce it because I ws hinted to an integer solution.
[Wizzer] 21. Dec 2012	*SPOILER ALERT* Solved too, but brute forced :( That was interesting in a sense that I discovered TI family of devices, never used before, but seen in shops :) was pretty fun playing around with emulator. Also found a website that can show source from application. Anyway, I couldn't write proper c# version of bruteforcer, turned out to be an issue of rounding difference of device and .net framework, so wrote it on device itself (and removed clock speed limit), took sometime and solution was found. program code for device to bruteforce, mention that there will be a syntax error when solution is found, cause I didn't check documentation details on how to break out of the loop, just choose "quit" and answer will be there: :1->V :While V < 1000000 :0→C :V->A :While C<100 :A+10*tan(A)→A :C+1→C :End :If A=19911.236 :Then :Disp V :Return 0; :End :V+1->V :End Thank you!
[Wizzer] 21. Dec 2012	Small addition: to fix syntax error please make sure to use "Return" without any arguments and semicolon (habit) :) ..... :Disp V :Return :End .....
eynstyne 21. Dec 2012	A decent emulator: TilEm What would the inverse function be then? I have tried: A-tan^-1(A)/10->A A-10/tan^-1(A)->A

Kurapica's .NET CrackME #15

Download CrackME.zip, 555 kb (password: crackmes.de)
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This is the 15th .NET crackme now and It's not too hard to solve but It still needs some brain, NO PATCHING is allowed since 2 bytes are enough to solve it.
I need a fully working keygen and a tutor to show the rest of us how you solved it.
You may need some tools to solve it so check http://www.reteam.org/board/ for some help

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 07. Mar, 2008
Downloads: 661

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Solutions

Solution by papanyquiL, published 23. jun, 2009; download (1193 kb), password: crackmes.de or browse.

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Discussion and comments

saitob 07. Mar 2008	Very nice design and music:) I'm very busy now aday's, but i'll look at it when I have the time...
soychino 08. Mar 2008	plain text comparison,only first three works.Nice one:)
The So;X 07. May 2009	hey do u know how to add mod or Xm file format in vb.net. please send me tutorial for that.
T.0.R.N.A.D.0. 07. May 2009	May be you can use uFMOD :) BTW, it's mentioned in the rules that : usage of packers/protectors is prohibited, unless they are written by you. But this one uses {smartassembly} obfuscator !
The So;X 08. May 2009	ya, T.0.R.N.A.D.0. is right ... obfuscator suscks in .net re :)
T.0.R.N.A.D.0. 09. May 2009	But {smarassembly} is easy to kill ;) [ Thanx to UFO PU55Y and Karupica ]
Kurapica Author 23. Jun 2009	well done papanyquiL
papanyquiL 23. Jun 2009	Thanks, it was fun. I look forward to another one :P

Kurapica's Hidden Code

Download CrackME18.zip, 274 kb (password: crackmes.de)
Browse contents of CrackME18.zip

This is crackme #18 and it has some nice tricks, You must write a keygen and a tutor for the solution to be accepted.

Enjoy

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 12. Oct, 2008
Downloads: 492

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by zzz048, published 28. feb, 2009; download (16 kb), password: crackmes.de or browse.

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Discussion and comments

Filler 12. Oct 2008	what I found: Rename the "FGTRxDFRTT44.dat" to FGTRxDFRTT44.exe, and you have the main App. But thats not all! Good job. I workin' on it!...
Kurapica Author 12. Oct 2008	This is one of the tricks but you will find that "FGTRxDFRTT44.exe" won't work unless fired by the loader !
Filler 13. Oct 2008	Hm? The "FGTRxDFRTT44.exe" will work without Loader, but the Serial check is inside the native "System.dll". and give a Bool to "FGTRxDFRTT44.exe". Right? :D
Sinok 13. Oct 2008	This trick was used in almost all Command and Conquer games.. lol
MACH4 13. Oct 2008	Oddly enough it will run but it's wouldn't be a stable executable file!!!
Kurapica Author 14. Oct 2008	@Filler : yeah of course it works without the loader but it won't check for the license if not being loaded by the loader, that's what I meant.
Filler 14. Oct 2008	Hehe nice! Today in the evening I try and catch the tricks ;) The obsfuscation makes it hard to understand. Could you tell me, why do you use "DebuggerAttributeBreakpoint"? greez
Kurapica Author 14. Oct 2008	These attributes are set automatically by the compiler and in this crackme they are not important so keep an eye on the CheckLicense method. :-D
Kurapica Author 03. Nov 2008	168 downloads and no solutions yet !! is it that hard ?
main 03. Nov 2008	Many crackmes, little time :/
Filler 21. Dec 2008	I think you write IL-instructions at Runtime, so no one can sea it in Reflector. Great work... It remeber me at the Anti-Debugger trick "Stolen Bytes".
Kurapica Author 01. Mar 2009	@zzz048 : I'm amazed by your solution, well done.
simonzack Moderator 02. Mar 2009	I'm still not quite sure how this works I think I need to dig deeper into the .net format Can somebody give me some suggestions of what articles/tuts to read? thanks
Kurapica Author 02. Mar 2009	http://portal.b-at-s.info/download/CrackME18.zip.php?list.2 Happy reading.
simonzack Moderator 02. Mar 2009	thanks a bunch :)

kwasek's CrackMe 6

Download crme6.zip, 16 kb (password: crackmes.de)
Browse contents of crme6.zip

100% keygenable

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 23. Jan, 2004
Downloads: 1128

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Solutions

Solution by BadSector, published 02. sep, 2004; download (17 kb), password: crackmes.de or browse.

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kwazy webbit's pacme

Download pacme.zip, 10 kb (password: crackmes.de)
Browse contents of pacme.zip

keyfile

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 24. Jun, 2000
Downloads: 2386

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Solutions

Solution by Plasmator, published 27. may, 2004; download (46 kb), password: crackmes.de or browse.

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Solution by kRio, published 29. jun, 2005; download (19 kb), password: crackmes.de or browse.

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Solution by boombox, published 24. jun, 2000; download (29 kb), password: crackmes.de or browse.

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Solution by mikl0, published 24. jun, 2000; download (21 kb), password: crackmes.de or browse.

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Solution by cronos, published 24. jun, 2000; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

Kwisatz Haderach's berkeley

Download berkeley.tar.gz, 3 kb

Find out how to bypass a filter.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 26. Oct, 2015
Downloads: 182

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Solutions

Solution by mrmacete, published 29. oct, 2015; download (6 kb), password: crackmes.de or browse.

mrmacete has rated this crackme as awesome.

Solution by acruel, published 28. oct, 2015; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

Kwisatz Haderach Author 28. Oct 2015	acruel was the first who solved the problem ;)
andrewl.us Moderator 29. Oct 2015	also see mrmacete's new solution, which could be called "A Reverser's Introduction to BPF"
Kwisatz Haderach Author 04. Nov 2015	Thnx to mrmacete for his problem decomposition and a list of additional information it could be really useful for those who want to start his BPF journey
mrmacete 11. Nov 2015	Thank you for the opportunity of knowing BPF! I made a follow-up project out of this, it's a new architecture plugin for radare2 to support BPF reversing and emulation: https://github.com/mrmacete/r2scripts/tree/master/bpf
Kwisatz Haderach Author 14. Nov 2015	Awesome! It's worth mentioning that BPF now is something more then network filter, it can be used in a various ways (mostly Linux kernel subsystems tracing), a few examples could be found here https://github.com/iovisor/bcc/tree/master/examples

kyREcon's AthCon2013_RE_Challenge

Download AthCon_2013_RE_Challenge.zip, 59 kb (password: crackmes.de)
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Hi guys,

This is the RE Challenge created for AthCon 2013 by Kyriakos Economou and Nikolaos Tsapakis.
The contest is not active anymore, but I am sure you are...

Enjoy,
kyREcon

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 11. May, 2013
Downloads: 218

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by s3Rious, published 27. jan, 2015; download (48 kb), password: crackmes.de or browse.

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Solution by zairon, published 11. jun, 2013; download (16 kb), password: crackmes.de or browse.

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Discussion and comments

jmper 14. May 2013	I think you you lie a little about difficulty ;) I read the solution from OKOB on exelab.ru forum and crackme has not easy VM. I think the real difficulty is 6/10
zairon Moderator 14. May 2013	It's not so hard as it seems, I used a simple Idc script to have a readable and debug-able code :) Anyway, maybe 5 is the right level value, let's see what's the opinion of the others.
kyREcon Author 16. May 2013	Well, sometimes it is not a trivial task to decide the level of difficulty, mainly because it's quite subjective. If you think it's level 5, 6 ..etc we can always change it, even though, to be honest, I wouldn't stick with that.
s3Rious 14. Jan 2015	I tried this crackme during the contest, but I failed to solve it. It was a personal challenge for me since today. :) I've solve level 4 and level 5 crackmes, but definitely this was much harder. I estimate its level to 6. A valid password is: EF BE AD DE EF BE AD DE EF BE AD DE B2 CB A4 AD I'll submit a solution soon. :)

kzndev's [K]me_kzndev_001

Download [K]me_001_kzndev.zip, 48 kb (password: crackmes.de)
Browse contents of [K]me_001_kzndev.zip

This is a really simple crackle made for mac os x users.

It is level 1 but should be 0.1 :) so easy..

Objective-c language.

Mac/Intel needed.

Difficulty: 1 - Very easy, for newbies
Platform: Mac OS X
Language: Unspecified/other

Published: 10. Jul, 2012
Downloads: 598

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

draww 11. Jul 2012	incomplete archive header or is it a Windows issue? can not see what's inside..
zepvn 11. Aug 2012	Could not extract it. Please re-submit.
Dr. Cat 14. Aug 2012	Re submit, Im getting an error when I try to unpack the zip file.
blue_devil 12. Jan 2013	Archive broken pls re-submit
maracuja_ 21. Apr 2013	Hello, Your archive is broken, if you can re-submit, it will be apprecied !
crackamania 23. Apr 2013	Delete this corrupted crackme.....
zairon Moderator 23. Apr 2013	Author contacted, I'm waiting for a reply from him
hackish 26. Apr 2013	Is file Broken? Please resubmit with MD5 checksum.
Dyddye 09. Nov 2015	Seems, that the upload failed: unzip -t \[K\]me_001_kzndev.zip error [[K]me_001_kzndev.zip]: missing 442368 bytes in zipfile
nerf 04. Feb, 22:29	Broken archive $ unzip \[K\]me_001_kzndev.zip Archive: [K]me_001_kzndev.zip error [[K]me_001_kzndev.zip]: missing 442368 bytes in zipfile (attempting to process anyway) error [[K]me_001_kzndev.zip]: start of central directory not found; zipfile corrupt. (please check that you have transferred or created the zipfile in the appropriate BINARY mode and that you have compiled UnZip properly) 1 archive had fatal errors.

^L00P's Smart Brain Force #2

Download smartbrainforce.zip, 2 kb (password: crackmes.de)
Browse contents of smartbrainforce.zip

This "could" drive You Insane....

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 13. Sep, 2002
Downloads: 2018

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Solutions

Solution by DiKeN, published 25. sep, 2002; download (1 kb), password: crackmes.de or browse.

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Solution by Bswap, published 17. sep, 2002; download (2 kb), password: crackmes.de or browse.

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^L00P's T0 Easy Crackme #1

Download t0_easy_crackme_from_l00p.zip, 6 kb (password: crackmes.de)
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Another Wery Simple Crackme.

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 23. Jul, 2002
Downloads: 2281

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Solutions

Solution by Bswap, published 18. sep, 2002; download (4 kb), password: crackmes.de or browse.

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Send a message to LaFarge »

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LaFarge's Crackme v0.2

Download lafarge__s.crackme.0.2.crackme-icu.zip, 34 kb (password: crackmes.de)
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Easy crackme (??) for newbies who wanna learn keygenning.

I implemented some simple algo so there should be no problems in keygenning it. Not packed, no code obfuscations, plain MASM32, so go keygen it

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 20. Jan, 2006
Downloads: 1957

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by red477, published 24. jan, 2006; download (5 kb), password: crackmes.de or browse.

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Solution by Ox87k, published 22. jan, 2006; download (53 kb), password: crackmes.de or browse.

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Solution by Kerberos, published 22. jan, 2006; download (39 kb), password: crackmes.de or browse.

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Discussion and comments

astigmata 20. Jan 2006	easy keygenme point H, F8, serial in stack. I ll look how it's generated thx 4 n00b
Ank83 20. Jan 2006	Hi, I'm missing one part of the app ! I didn't understand it. I will look it again. If some one has the key what is happening on the IDIV EBX line please help me. Here is the code: Dim Cons, Name, Char, Char1 As String Dim Xored, Xored1 As Integer Cons = "_r <()<1-Z2[l5,^" Name = Text1.Text Text2.Text = "" While Len(Name) < 16 Name = Name & Name Wend For i = 1 To Len(Cons) Char = Mid(Name, i, 1) Char = Asc(Char) Char1 = Mid(Cons, i, 1) Char1 = Asc(Char1) Xored = Char Xor Char1 'MISSING PART 'MISSING PART If Abs(Xored1) <> Xored1 Then Xored1 = Xored End If Xored1 = Xored1 + 65 Text2.Text = Text2.Text + Chr(Xored1) Next i Thanks and regard Ank83
astigmata 20. Jan 2006	004011EE CDQ // convert double to quad 004011EF IDIV EBX //integer divide I try to understand me too but :P
Kerberos 20. Jan 2006	In EAX you have I-th char your name XORed with I-th char from that constant string, EDX = 0 and EBX = 0x19 so IDIV EBX ... EAX = EAX / EBX EDX = EAX % EBX
astigmata 20. Jan 2006	damn, you right Kerberos I didn't know that, thank U.
astigmata 20. Jan 2006	selfkeygen Patches Address Size State Old New Comment 0040120B 8. Active MOVS DWORD PTR ES:[EDI],DWORD PTR DS:[ESI] JMP crackme.0040128E 00401290 5. Active PUSH crackme.0040630C PUSH EDI
Ox87k 21. Jan 2006	i submitted my solution yesterday... however thanks 4 this crackme lafarge! g00d j0b!
Kerberos 22. Jan 2006	Hey red477, you've nice keygen, but it doesn't works well for all inputs :-/ For example on input : "1234567890321456987777778" your serial key is KOTI-EGLJ-UGBF-SBAE, but correct key is OTYB-OMXA-JGBF-SBAE :-/
red477 23. Jan 2006	Kerberos,Yes,u r quite right and thank you very much for tell me this.and i made such a big mistake on this little simple crackme...:( i will improve myself in my later solutions. but probably after a time coz i am a little occupied for now.
red477 24. Jan 2006	and again a little problem on Ox87k solution.it wont generate key for inputs whose length is exactly 26.for example "12345678903214569877777781"=>"OTYB-OMXA-JSBF-SBAE".that's it (such a small flaw)and i really learned a lot from all of you.thank you. :)
red477 24. Jan 2006	since i dont want to send a newer version of solution again so i will leave maybe my last comment on my solution here:the solution is still not perfect,you will still find bugs(i have found some:)).
toshimi 25. Jan 2006	ZZZzzzz.. very easy..!!! thanks LaFarge's
Jailani 14. Feb 2006	How do i submit the key gen here well i did,nt write the solution i made the keygen but i can explain what i used i can paste the coding i used it is ser = "0000000000000000" tl = 0 a = "_r <()<1-Z2[l5,^" b = Trim(Text2.Text) If Len(a) > Len(b) Then tl = Len(a) Else tl = Len(b) For i = 0 To tl - 1 ai = (i Mod Len(a)) + 1 bi = (i Mod Len(b)) + 1 seri = (i Mod 16) + 1 Mid(a, ai, 1) = Chr(((Asc(Mid(a, ai, 1)) Xor Asc(Mid(b, bi, 1))) Mod &H19) + &H41) Mid(ser, seri, 1) = Mid(a, ai, 1) Next i For i = 1 To 16 Step 4 sr = sr & Mid(ser, i, 4) & "-" Next i Text1.Text = Mid(sr, 1, Len(sr) - 1)
Jailani 15. Feb 2006	Its just Xor Algorithm is,nt It
r-Evolution 05. Oct 2010	What a nice and interesting keygenme...I suppose i am gonna write my first keygen on it!!!!
r-Evolution 08. Nov 2010	i finished the keygen now..Solution on the way
r-Evolution 08. Nov 2010	@jailani xor eax, edx eax % 0x19 eax + 0x41
aldeid 05. Dec 2015	My solution posted here: https://www.aldeid.com/wiki/Solution-LaFarges-crackme-2

LaFarge's LaFarges crackme #1

Download lafarge-crackme1.zip, 34 kb (password: crackmes.de)
Browse contents of lafarge-crackme1.zip

Blah, cannot rate the dificulty :)

Anyway, u should rate it. I think its 2/10 but...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 04. Jan, 2005
Downloads: 2151

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Solutions

Solution by haggar, published 27. may, 2005; download (45 kb), password: crackmes.de or browse.

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Discussion and comments

simpleuser 18. Oct 2007	I did it the same way but quickly wrote an ImpRec plugin instead - should I submit - that part only?
TiGa 18. Oct 2007	It's better to include the keygenning part too, even if it is very similar.
choko01 01. May 2011	whywhy ?? http://www.virustotal.com/file-scan/report.html?id=bf60981d8f1b179d4ed342cdab783f7256501d6568387d566fe6ca992c1913ec-1304221596
morecode 21. Oct 2012	AVG virus detected in crackme.exe Virus name NGVck.2.A. Is it right??
haggar 27. Oct 2012	No there is no virus. But so what if it is? You are reversers, aren't you? Analyse files by your self (or read solution). haggar

LaFarge's LaFarges crackme #2

Download lafarge-crackme2.zip, 31 kb (password: crackmes.de)
Browse contents of lafarge-crackme2.zip

Next one in my crackmes series. Once again, dunno what dificulty it is, u rate it :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 09. Jan, 2005
Downloads: 14814

Rating

Votes: 11
Crackme is quite nice.

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Solutions

Solution by Lesco, published 20. jul, 2005; download (12 kb), password: crackmes.de or browse.

Lesco has rated this crackme as quite nice.

Solution by Mr ThEkIlLeR, published 11. jan, 2005; download (68 kb), password: crackmes.de or browse.

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Solution by _HellDashX_, published 11. jan, 2005; download (64 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

deibiz_xxl 21. Sep 2005	I have coded a KeyGen like HellDashX's but his one is better. LOL, good crackme, keep up the good work. I think That reusing the program to make the KeyGen is the best thing you can do to avoid headaches. LOL!
PiCkLeD 03. Jan 2006	The music in this keygen will drive you friggin nuts! Be warned, gonna write a tut on how to patch the audio :)
Reverser 09. Jan 2006	Cracked by Reverser//ICU :) Good luck LaFarge :) I enjoyed this crackme :) i'm w8ing 4 more =P
qHF; 30. Oct 2009	Patching the music is easy. 00401050 NOP 00401051 NOP 00401052 NOP 00401053 NOP 00401054 NOP 00401055 NOP 00401056 NOP 00401057 NOP 00401058 NOP 00401059 NOP 0040105A NOP 0040105B NOP Not beautiful, but it does the trick.
Neonlights 30. Oct 2009	Music will drive you crazy if you dont crack it in about 38 seconds. But it shouldnt take much longer than that. NEon 3568632395
lordram 29. Nov 2009	gHF you can also patch the music by changing the 00401603 JNE to JMP ;)
h3X- 14. May 2010	I love the music! Wish more crackmes were of this quality. :)
G3rMaN1a 26. Jul 2010	LOL I finished it in 1 minute by changing 2 Chars with OLLYDBG ^^
Noteworthy 25. Apr 2011	Cracking done ! MADE US SOMETHING GOOD, OR I SHOOT U :)
mausy131 18. Apr 2012	Very nice CrackMe. I just SelfKeygenned it. It isn't a hard one, but we can learn a lot from it . Nice work -Mausy131
pineapple0x 29. May 2012	my first crackme, was a nice one... but wery easy lg pineapple...
domi338 04. Jun 2012	Nice crackme domi338@w.cn 314192077
adlers 07. Jun 2012	Easy to hack, but the keygen creation not so easy... Nice example.
kranked 09. Jun 2012	nice crackme but very easy!!
xteraflopx 21. Aug 2012	<b>Why am I so stupid an not able to do this?</b>
mausy131 22. Aug 2012	Thats not stupid, just need to learn stuff!
wired 17. Nov 2012	Nice Crackme! Greez WireD
NukeCrack 05. Jan 2013	Patched by NukeCrack Time : 3min ;-)
ntor 05. Jan 2013	Keygenned, I'll add my solution. ntor
VectorEQ 16. Jan 2013	loved it, music didnt bother me atall hehe, was the first crackme i did so far :) good stuff. deleted a whole letter N to get around that. still need to learn more to make a keygen sometime :)
sraboy 22. Mar 2013	I can't do keygens yet, but this was simple to patch with OllyDbg by changing the JNZ to JZ at 0x4012BC so any user/serial combo works. I used IDA to find the success message, saw the strcmp about that and noticed the JNZ after that.
iSSoGoo 23. Mar 2013	@sraboy: Hi, I just read you comment. Please re-think about your patch! Will it really work with "any user/serial combo"? For example take this one: iSSoGoo 232974532 Just a hint to let it accept every input: 0x90, 0x90 :D But it will still not accept any input with less than 4 chars, so there has to be patched a bit more ;) Greetings
minecrawlerx 23. May 2013	lawl. this is stupid. My first crackme. And all I do is search for string "nope" and replace first jump I find with NOPs...
Draco104 02. Jun 2013	lol i got bored and made a patch :P
JC-SoCal 26. Sep 2013	I made a video of me reversing the key algorithm and patching it http://www.youtube.com/watch?v=DEDYk8zN53A
oXYgen 14. Dec 2013	Keygen this is very simple if we are a little bit clever :) Solution incoming :D
cynic0 24. Apr 2014	JC-SoCal, thanks for doing that, really helpful! that was my first one, i aimed only on bypass key check, now i've learned how to combine ida with a debugger and that's freaky useful.
5p4d3r 05. Oct 2014	This was my first keygen. I wrote it in C from OllyDBG output. I found it to be a really fun challenge. It was the first C program I've written in years so it took me way longer than it should've. Thx LaFarge!
5p4d3r 07. Oct 2014	btw a sophos av reported this crackme as malware ?!?!?
5p4d3r 09. Oct 2014	@iSSoGoo You can patch it to accept <4 but the serial generation algorithm depends on it. I can't upload a solution but the C code for the keygen I wrote details it clearly.
LaFarge Author 02. Feb 2015	Heh, but the point of the crackme is not to "patch" it. If u payed attention, it says "now go make a keygen". The goal is to understand the algo and to code it for yourself, not to rip it or make selfkeygens. I hope u understand the goals and what u need to do in order to accomplish the goal. Anyway, i wrote this so long time ago, but i think its still good for learning purposes. Crack on
Helistar 10. Mar 2015	Thank you LaFarge, this crackme appears to be popular on the web ;P Very useful, thanks.
nthrev 05. Jun 2015	The challange was amaising its took me 3 h. to understand wxactly the algo , and make the keygen.... you are the best!!!! p.s. if you can make an youtube breakdown for each one of yours challange its will be very helpfull becoas than you can learn and move up , without this its just a test for your skills , nothing to learn from (maximum you get an expiriance)
matija90 13. Sep 2015	Very good encryption and thanks to JC-SoCal for the video.
shahril 01. Nov 2015	very good, this is my first crackme and i done creating a keygen for it :D, took me many hours to analyze it, and music is so good!
xTeamStanly 13. Feb, 18:25	Good crackme, if anyone care about the chiptune I ripped it and you can open it (its 100% opening with VLC, idk about the rest) Link to chiptune: https://www.dropbox.com/s/sc6y4lu9soyu4ah/xmastune%202004.xm
Tenderz 09. Mar, 22:28	First crackme i tried to solve, got me stuck for about 4 hours, but happy to have a working keygen in the end. It surely was fun :)
edza 15. Aug, 19:17	Thanks for making it. Spent a lot of hours (8?) in a leisurely pace. Did it properly rewriting the whole algorithm in C# Self-Keygen here would be the obvious solution with IDA Decompiler copy + paste. Very good for introductory learning. Has a few interesting ideas, but nothing too fancy. https://github.com/Edza/Lafarge2Keygen
707070 29. Aug, 09:18	im a noob at cracking,just started.DUNNO HOW I SOLVED IT IN 5 MINS(too many tutorials,I guess :> )
h3x1c 01. Sep, 15:36	Since plenty of others have done a thorough job explaining the keygen algorithm, I decided to do something a bit different and use this CrackMe to demonstrate how to use Cheat Engine to crack and patch apps. For the last bit of the video, I demonstrate how to modify the functionality of the About button to make it successfully register the application when clicked. Hope you enjoy! How to Crack and Patch Applications with Cheat Engine: https://www.youtube.com/watch?v=Emiuht3YSXA
edza 16. Oct, 20:30	I made a short 10 minute YouTube video overview for this crackme. https://www.youtube.com/watch?v=CbQNQEpdMIs It's for the complete beginner who wants to know what to do or is stuck! The quality is not stellar, but the info delivered is solid! :)
1162987472 22. Nov, 16:32	For a noob(Eg: myself...) Patch it is so easy. But analyze how the key generate from username (not copy+ paste the code to make a key gen) is quite hard...

lagalopex's cm1

Download cm1.zip, 3 kb (password: crackmes.de)
Browse contents of cm1.zip

Get a working key/keygen.

Allowed are only GPLed-tools.

Patching/Hijacking prohibited ;)

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 02. May, 2007
Downloads: 1815

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Solutions

Solution by Yoha, published 14. feb, 2013; download (4 kb), password: crackmes.de or browse.

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Solution by _DarKPhoeniX_, published 27. jul, 2007; download (173 kb), password: crackmes.de or browse.

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Discussion and comments

kbpower 23. Dec 2010	I don't think this is Level 1, please re-evaluate thnx
Noteworthy 05. Dec 2013	Cracking Done :) Maybe 1 - 1.5, because there is no protection on it and the routine is relatively easy to trace.
jendas 01. Jan 2015	I think that difficulty 1 is adequate since there is no obfuscation and as Noteworthy already wrote, it is quite easy to trace. Nevertheless I really enjoyed this crackme :-)

lagalopex's cm2

Download cm2.zip, 2 kb (password: crackmes.de)
Browse contents of cm2.zip

Get a working keygen.

Allowed are only GPLed-tools.

Brute-force is neigher necessary, nor allowed.

Patching/Hijacking prohibited ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 12. May, 2007
Downloads: 602

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Solutions

Solution by Yoha, published 14. feb, 2013; download (15 kb), password: crackmes.de or browse.

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Solution by _DarKPhoeniX_, published 27. jan, 2008; download (202 kb), password: crackmes.de or browse.

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Discussion and comments

lagalopex Author 04. Jan 2008	Is there anything wrong with this crackme? Because its quite old... and imo not that hard.
TiGa 05. Jan 2008	There are not many Linux reversers. "Allowed are only GPLed-tools" reduces that crowd even further.
lagalopex Author 05. Jan 2008	Yeah, might be. But I want to learn from the solutions. And when they use e.g. IDA (sometimes even for windows), it helps nothing, beacause I dont want to buy such an expensive program for that.
bulkangel 06. Jan 2008	Hi, I think the problem with this crackme is that we don't know what to do and it is not really motivating :S. What are we looking for ? A basic "strings" doesn't give anything interesting (neither a "Good", nor a "Bad"), so we can easily conclude that once we will find a valid key, the crackme will not prompt anything ;).
lagalopex Author 06. Jan 2008	Ever heard of hidden/encrypted/hardcoded strings? ;) When you look a little bit in it and do something, you'll get messages. Btw printf is used. Most code is for the messages, you don't need to care about that. The important code is quite short and easy. That's why I rated it "2".
stupid 24. Jan 2013	hello,are you sure the hints "8355h" is enough? thank u

lagalopex's cm3

Download cm3.zip, 7 kb (password: crackmes.de)
Browse contents of cm3.zip

Get a working keygen.

Allowed are only GPLed-tools.

Patching/Hijacking prohibited ;)

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 07. Feb, 2008
Downloads: 659

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by Yoha, published 14. feb, 2013; download (18 kb), password: crackmes.de or browse.

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Solution by jason.hunter, published 25. feb, 2008; download (18 kb), password: crackmes.de or browse.

jason.hunter has rated this crackme as quite nice.

Solution by mindless, published 17. feb, 2008; download (270 kb), password: crackmes.de or browse.

mindless has rated this crackme as quite nice.

Solution by _DarKPhoeniX_, published 06. feb, 2008; download (262 kb), password: crackmes.de or browse.

_DarKPhoeniX_ has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

lagalopex Author 07. Feb 2008	Unfortunately I had a little mistake in the previously posted crackme: The calculation was mathematicaly wrong because of a "<" where a "<=" should have been. Sorry about that! _DarKPhoeniX_ made a solution that was correct, but the way of the brute force not applicable anymore with the corrected crackme.
lagalopex Author 10. Feb 2008	I was asked if this cm is the corrected one and I can confirm that. So have fun linux RCEs ;)

lagalopex's cm4

Download cm4.zip, 3 kb (password: crackmes.de)
Browse contents of cm4.zip

Get a working keygen.

Allowed are only GPLed-tools.

Patching/Hijacking prohibited ;)

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 24. Jan, 2008
Downloads: 766

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Solutions

Solution by s3Rious, published 15. aug, 2013; download (17 kb), password: crackmes.de or browse.

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Discussion and comments

lagalopex Author 23. Apr 2009	Older than a year and no feedback at all. :-( I know its not simple and there are some nice tricks, but nothing impossible ;) Is anybody working on it right now?! (You might pm me.)
_EDX_ 06. Jul 2010	Ok, i'm working on this and i have to admit that is pretty hard, with a very lot of temporary patchs(needed to debug the app), i'm able to see the 'interesting part' of this crackme. Now it's time to understand this 'interesting part'. Anyway, this is a very good crackme.
lagalopex Author 28. Nov 2010	Its nearly three years old and still no solution. I already kept the file intact and even linked dynamically ;) Hope someone will will accept this challenge! (I developed another crackme which should be even harder...)
tamaroth Moderator 29. Nov 2010	Well, limiting the cracking to GPL-licensed tool narrows the number of people who will actually do it. I, for one, will try to make a keygen, but due to tools i'm using not being GPL-licensed, i definetly won't write a tutorial ;-) But i'll have a butcher's :)
lagalopex Author 30. Nov 2010	So, lets allow all tools and programs under a osi certified os-license, or tools written by yourself. What tools are you using?

laokoon's vb crackme #1

Download lao_vb1.zip, 34 kb (password: crackmes.de)
Browse contents of lao_vb1.zip

name/company/serial (vb5)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 09. Jul, 2001
Downloads: 1286

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Solutions

Solution by kathras, published 09. jul, 2001; download (79 kb), password: crackmes.de or browse.

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LeeviON's CrackMe #2

Download CrackMe_#2.zip, 4 kb (password: crackmes.de)
Browse contents of CrackMe_#2.zip

Tasks:
1.Kill the message
2.Get the name
3.Get the serial

Rules:
1.Do not patch

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 02. Dec, 2008
Downloads: 1073

Rating

Votes: 7
Crackme is boring.

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Solutions

Solution by _HellDashX_, published 12. dec, 2008; download (898 b), password: crackmes.de or browse.

_HellDashX_ has rated this crackme as nothing special.

Solution by thomas.idpz.net, published 12. dec, 2008; download (164 kb), password: crackmes.de or browse.

thomas.idpz.net has rated this crackme as boring crap.

Solution by Warning, published 12. dec, 2008; download (280 kb), password: crackmes.de or browse.

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Discussion and comments

mjesun 02. Dec 2008	I got the name & serial, but, nag screen should be killed without patching?
xrem 07. Dec 2008	mjesun:"screen should be killed without patching?" maybe write loader? )
mjesun 07. Dec 2008	What do you mean with "write loader"?
_HellDashX_ 10. Dec 2008	Submited, :) A easy crackme, but fun if you have time for it
mjesun 12. Dec 2008	Warning, how did you kill the nag screen?
mjesun 12. Dec 2008	@thomas.idpz.net, you forgot to align the stack after NOP'ing the call... call [MSVBVM60.rtcMsgBox] should be changed by an "ADD ESP, 14h" command
kranked 11. Jun 2012	nice crackme!!! learned alot!! also thx to _HellDashX_ for the solution!!

LeeviON's First C++ KeygenMe

Download First_C++_SerialMe.zip, 5 kb (password: crackmes.de)
Browse contents of First_C++_SerialMe.zip

Getting harder..

Rules:
1. Get the serial. It will be different every time,
so you should make an keygen that generates
serial with the same algorythm.
2. Do not patch!
3. Write a tutorial

Hints:
Serial consists of 30 numbers!!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 02. Dec, 2008
Downloads: 452

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Solutions

Solution by JoKa, published 09. dec, 2008; download (7 kb), password: crackmes.de or browse.

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Solution by _HellDashX_, published 09. dec, 2008; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

mjesun 02. Dec 2008	004012BB lea eax,[local.3] ; \|\| 004012BE mov dword ptr ss:[esp],eax ; \|\| 004012C1 call <jmp.&msvcrt.time> ; \|\time 004012C6 mov eax,[local.3] ; \| 004012C9 mov dword ptr ss:[esp],eax ; \| 004012CC call <jmp.&msvcrt.srand> ; \srand How can we make a keygen of a program that generates its serial using the milliseconds of the time when it was executed? Is VirtualAlloc / WriteProcessMemory hotpatching allowed? ¿¿!
mjesun 03. Dec 2008	hmm... that's not very scientifical... xD
_HellDashX_ 03. Dec 2008	"mjesun: you can run your keygen from BAT-file: start SerialMe.exe start keygen.exe In most cases it will be enough to have the same time in SerialMe and keygen during serial generation. " JoKa: Not exactly, not is 100% succesful operation. Look the serial algo and you will find it
mjesun 03. Dec 2008	Ok then, I will make a remote hotpatcher... I think it would be useful for people that is learning
LeeviON Author 05. Dec 2008	User named HMX0101 did it! he made a key generator that works! It just reads the serial from memory. If you really wanna, download it from http://stashbox.org/313500/ksmlee.rar <-- there
_HellDashX_ 05. Dec 2008	I have another, and another that self keygenning the app. Both solutions are correct
mjesun 05. Dec 2008	I made a program that changes the value returned by time to be always 0. It's being reviewed by moderators. Beyound this point, serial will be always the same.

LeeviON's Guess this man

Download Crackme.zip, 3 kb (password: crackmes.de)
Browse contents of Crackme.zip

Guess that..
Haha so great

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 10. Jan, 2009
Downloads: 402

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Solutions

Solution by shellwolf, published 17. jan, 2009; download (4 kb), password: crackmes.de or browse.

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Solution by freesoul, published 17. jan, 2009; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

shellwolf 12. Jan 2009	Patch is allowed? something is hide and disabled. "3.3245749"
LeeviON Author 14. Jan 2009	yes,patching is allowed.

LeeviON's Keygenme

Download Keygenme.zip, 7 kb (password: crackmes.de)
Browse contents of Keygenme.zip

keygenme.exe is a "real" keygenme, becourse it checks that if the serial is created by the real algorythm. It is very easy, after this i make a harder one. Hope you like it.

1. No patching
2. No bruting
3. Just make a keygen

I made my own keygen there, it is protected by password, but when you get the algorythm, you should guess the pass.

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 22. Jan, 2009
Downloads: 1052

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Solutions

Solution by br0ken, published 30. jan, 2009; download (16 kb), password: crackmes.de or browse.

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Solution by LeeviON, published 30. jan, 2009; download (377 b), password: crackmes.de or browse.

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Discussion and comments

hackereha 25. Jan 2009	am i missing something or you forgot to include the zip pass 0.o?
hackereha 25. Jan 2009	ok got it now:D
Y9IgB7 06. Jul 2012	keygen it，so easy

LeeviON's LeeviON's first crackme with Assemby

Download LeeviON__sCrackme.zip, 951 b (password: crackmes.de)
Browse contents of LeeviON__sCrackme.zip

This crackme has been made by LeeviON with flat assembler 1.68

You can patch it, but i would like to see someone making a program that is started before this crackme, and then it "cracks" this.. what was its name?

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 09. Jan, 2010
Downloads: 1074

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Solutions

Solution by Dionosis, published 09. jan, 2010; download (13 kb), password: crackmes.de or browse.

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Send a message to legendoflegacy »

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Discussion and comments

Dionosis 09. Jan 2010	Maybe you're talking about a "loader" ?
qpt^J 09. Jan 2010	loader in masm ;) http://www.4shared.com/file/192298618/dd6f9005/Loader.html
_pusher_ 09. Jan 2010	qpt^J: i had a better solution to include both messages :) also.. dont post url's in messages.. to avoid viral problems.
Dionosis 09. Jan 2010	Ok for me, very easy to solve. I have submitted a solution. ^^
Jekku 22. Jan 2010	Would a loader made with dUP2 qualify?
makaka 29. Feb 2012	Cracked... It's so easy huh! Pic: http://i009.radikal.ru/1202/e8/1c2239939d3f.bmp
0xAF 24. Aug 2012	Wooow, I realized that the best way to learn ASM - crackMe ----------------------------- many thanks, LeeviON )

legendoflegacy's CrackTHEKey#02

Download CrackTHEKey#02.zip, 32 kb (password: crackmes.de)
Browse contents of CrackTHEKey#02.zip

Your Task is to just find the serial key or turn modify the program so that it tells the serial key.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 25. Aug, 2010
Downloads: 1679

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Solutions

Solution by Klaria, published 08. sep, 2010; download (47 kb), password: crackmes.de or browse.

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Discussion and comments

zocker_max 29. Aug 2010	Hab ne Patchversion erstellt.
zocker_max 29. Aug 2010	I have build a Patch.
freesoul 29. Aug 2010	zocker_max why a patch :P hint: 30*p=c
zocker_max 29. Aug 2010	I hint "30*p=c" but -> Invalid key!!!
freesoul 29. Aug 2010	30*plain_sum = cipher_sum key = plain_sum in Z_256
zocker_max 30. Aug 2010	sry I don't understand. I don't find the serial. :(
mystery_reverse 31. Aug 2010	I have tried it, what it does it what ever the key you enter it takes the AL value alone and addes it to the next string and keys the final outcome as the key to add with all the plain text and makes a cipher. Then comes the fun part it has hard coded the key and the final outcome of s2 after encrypt is FEFE........FE where the string is 13 bytes!! Will publish the outcome soon!! I mean the key
mystery_reverse 31. Aug 2010	The cipher key hex bytes are "FE FA DD E1 E9 D5 EC E1 D9 FE FB 05 FE 01 EE F1 EA D5 F8 ED F6 FE D9 D5 F0 DD F7 F5 EB 00 00 00 = S2 Will post the next outcome !!
ap0k 01. Sep 2010	zocker max,can you send to me your patch?
zocker_max 01. Sep 2010	y. write me a msg with ur skype od icq datas.
zocker_max 01. Sep 2010	In teamwork with Freesoul (he find the solution and help me to understand:)) the Serial is: VR59A-D91VS-VYFIB-PENV1-H5OMC and ÍÊÁ╣┴¡─╣▒ÍË¡Í┘ã╔┬¡ð┼╬Í▒¡╚Á¤═├.
guoshuj 01. Sep 2010	it's like the Caesar cipher
ap0k 02. Sep 2010	zocker max,i don't use icq,i use msn,my msn:star.huang@msn.cn,please send your solution to me,Thank you!
zocker_max 02. Sep 2010	I have't msn, but write me per postmsg in forum ur email then I send it u.
legendoflegacy Author 07. Sep 2010	zoker_max you should have posted a solution rather than posting a key as far as freesoul is concerned he sent me the solution but i also asked him to post it as a solution here.
zocker_max 07. Sep 2010	I have upload my solution. -> "Your solution to this crackme is being reviewed by moderators." I don't know why u can't read it. (It's a ZIP-file)
ACiD.WAStE 13. Sep 2010	Are we allowed to change the JMP's?
promix17 29. Dec 2010	Password: hhh access.dll: A0A0A0 Simple brutforce... Can anybody explain what 00401174\|E8 D7390000 sub do?
gebos 07. Apr 2011	I HAVE FOUND A SOLUTION CAN JUST CREATE ACCESS.DLL FILE FILED WITH 104 ZEROS (EQUIVALENT TO 0X68) AND ENTER ANY PASSWORD IT WILL BE RIGHT IF YOU LOOK AT THE CODE YOU WILL FIND THAT THE TWO VARIBALES LOCATED FOR THE PASSWORD AND THE BUFFER OF THE FUNCTION READING FROM THE FILES ARE LOCATED UNDER EACH OTHER IN THE STACK SO IF YOU FILL THE ACCESS.DLL FILE WITH ASYMETRIC 0X68 BYTES THE LOOP WILL OVERRIGHT THE PASSWORD BUFFER AND THE CMPRSTR WILL FIND THEM EQUAL

lena151's ReverseMe#2 by lena151

Download ReverseMe_2_by_lena151.zip, 277 kb (password: crackmes.de)
Browse contents of ReverseMe_2_by_lena151.zip

Some time ago, I coded a freeware application in which a registration scheme was only implemented to help me keep track of its use (free registration).
I amused myself coding a rather difficult scheme, however, it can easily be made many times harder.
To comply with forum rules, I have grabbed the registration scheme and made a CrackMe from it.
Everything is allowed : serialfishing, patching, brute forcing ... the ultimate goal being a keygen.
The only nag in the real stuff is when clicking the "Register" button as each time an action is required, the registration scheme is re-run internally to decide on acting or not. To make the reverseme easier, I have also implemented a startup and closing nag.
It's clear that killing the nags and About Box is NOT helping. This only confirms the non-registration internally.
In a valid solution, the goodboys are shown.
I built some useless code around the CrackMe to make it the normal size of the software.
ReverseMe is not packed nor encrypted. I believe it is virtually impossible without the following hints though :
1. For the application to be registered, it must say "REGISTERED" on the registration window. However, all the obvious goodboys in the strings (Success ... Registration SuccessFull ... Thanks for your support !!!! ... REGISTERED) are NOT used but are diversion code, seek elsewhere !
2. This "reverseme" is in fact part of an application which has 20 (twenty !) checks and doublechecks. If any of these fail, you are sent in the woods to go play with Robin Hood. In this case, the real serial is never calculated (only a fake diversion serial is calculated). BTW, assume anything by "checks and doublechecks", like suppose : verifying if the length of a certain part of the serial is right, else --> go see Robin in the woods.
3. This reverseme is part of a real application : at startup, it verifies for "was I previously registered or not ?". If it was registered before, the registration scheme is not shown in the real application. BTW, the reverseme shows the goodboy at startup when registered before (because there is no "application" here).
4. Find the ring0 debugger checks (find them all !) --> else go see Robin Hood
5. Find the ring3 debugger checks (find them all !) --> else go see Robin Hood
6. Find the anti-tracing --> else go see Robin Hood
7. ALL detecting is silent : if anything suspicious is detected --> go see Robin Hood
8. Expect some more tricks, probably these being the most important factor of faillure of all.

Success and have fun !
lena151

Difficulty: 7 - Very hard
Platform: Windows
Language: Unspecified/other

Published: 27. Jun, 2007
Downloads: 1077

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by lena151, published 19. jul, 2007; download (141 kb), password: crackmes.de or browse.

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Discussion and comments

Shism 27. Jun 2007	The only reason it's "uncrackable" because it's soooooo boring. There is just endless and endless amount of code.... that it makes it boring.
rAsM 27. Jun 2007	" Find the ring0 debugger checks " driver??
lena151 Author 28. Jun 2007	I have included in the download a second file that shows anti-debugging (on the closing nag). Like said before: if your debugger is detected, it's not possible. This second file is supposed to help you in finding/eliminating the anti to find the reg scheme. Success!
ChupaChu 30. Jun 2007	Well i dont run any debugger on my machine and still i got debuger detected message?! (just runed it on xp sp2 - clean install (vmware) from windows explorer)
lena151 Author 01. Jul 2007	Do not run in VM's because any "handling" may get detected. Also, sice will get detected if it's installed.
brain_removed 09. Jul 2007	o_O it's to hard recursive algo + some vm (or not %)), my head exploited... it harder then bLaCk-eye's Nightmare or JUN!0R keygenme... to Lena: has it some crypto?
lena151 Author 19. Jul 2007	@brain_removed It has no crypto other than some crypto in the strings. There is absolutely no crypto involved in the reg scheme though. @Shism: It is your good right to express your feelings, thanks for the comment. However, it seems to me that you may have missed the meaning of the initial comments (see above). Indeed, if you miss anything from the anti, then you are sent into seemingly endless and recurrent code (I called it being sent into the woods to go play with Robin Hood). Of course it is boring in that case, however, I warned about it ... Anyway, it's probably too hard even with the anti-debugging detecting file included. Hence, I've uploaded my own solution/keygen (see solution above). Your own solutions be it a patch/keygen are still (very) welcome though! lena151.

lena151's ReverseMe#8 by lena151

Download ReverseMe#8_by_lena151.zip, 64 kb (password: crackmes.de)
Browse contents of ReverseMe#8_by_lena151.zip

ReverseMe#8bylena151 is my challenge 2007
Can you beat this one?

Goal is to register the ReverseMe. This is visualised if it says at startup "REGISTERED to:" followed by the name you registered it for.

Mostly byte coded in assembler (masm).

Not packed.

You may either patch, fish or keygen. More info in About box. (Obviously, no aesthetic-patching-only!)

On a sidenote: it was also a challenge for me as I had never byte coded such a long part in one target. Don't be surprised when you see the disassembled file in a debugger!

Info: it's not the algo that makes the challenge! The algo is short and easy, the real challenge lies elsewhere! I take my hat off and bow deep for those bringing a valid solution! Please explain how you did it.

Success and have fun!

Regards,
lena151.

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: Assembler

Published: 17. May, 2007
Downloads: 630

Rating

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Solutions

Solution by lena151, published 24. jun, 2007; download (2091 kb), password: crackmes.de or browse.

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Discussion and comments

fjlj 18. May 2007	could you fill me in on the new lingo.... what is aesthetic-patching ?
Zaphod 18. May 2007	lena151: I assume you are the lena151 who made those 36 videos on cracking. Well, I take my hat off and bow deeply for that! What a marvellous deed! Thank you! Your crackme is probably too hard for me, but I'll give it a try...
Zaphod 18. May 2007	Oh well, you are the right lena151 - I wrote the above before I downloaded the crackme :)
lena151 Author 18. May 2007	@Zaphod: yep, that's me. Thanks. Euhm, FYIO, has become 39 videos meanwhile LOL @fjlj: aesthetic patching means not to patch through the registration scheme but for example by plain stupidly opening the ReverseMe in a resource editor and changing the "UNREGISTERED" into "REGISTERED to: fjlj" which doesn't effectively register anything. Right? Success! lena151.
Zaphod 18. May 2007	I'll hurry and get the last 3 videos - I have learned a lot from the first 36!
neox.fx 18. May 2007	hey lena151, sent the patched one.... btw, the real edit box was under another resource and moved it little down [hope you dont mind ;-)] btw, you'll see two "Registered to Neox" messages, and you know why ;-)
thE Cur!ouZ 18. May 2007	I give u a hint folks.... just bpx DialogboxparamA..and use IDA to Or u can debug with IDA in same tome use C button de make the code clear.... ;-)
lena151 Author 18. May 2007	A remark though: any patching from the resources is not acceptable as a valid solution. You really should patch (though I prefer a Keygen) the registration scheme to make it accept (at that time invalid) data. I will warn you that there is lots of decoy code, so any patching of this is falsely "registering" too. @neox.fx: sorry, but what you see as the real editbox is NOT the real edit box. The reverseme needs to display the registration status in the edit box that is visible. Hint: ReverseMe#8bylena151.dat is bogus code! You really must go dig deeper!
profdracula 19. May 2007	You must bypass hw/sw, debugger detections otherwise you'll be lost in deep-woods :) A better way is to use IDA and understand how to make a valid keyfile!
lena151 Author 19. May 2007	Exactly! I will fill you in on some details to make your reversing less difficult: the ReverseMe makes extensive use of -code obfuscation -code destruction -decoy code and decoy strings -machine specific algo -selfmodifying/polymorphic code -string decryption/re-encryption -algo hiding to make your life miserable. However, the deadly traps are that it has -anti-tracing -HW BP detection -Software BP detection -ring0/ring3 debugger detection -anti-patching and if any of the last 5 are detected ... the real algo is never run and you are sent into the woods to go play with Robin Hood. My advice: find the traps first and eliminate them to be able to find the real algo! Success!
thE Cur!ouZ 19. May 2007	Well... I use IDA 5 for analyse this sweet ReverseMe (Thanks lena).. 1-BP DialogBoxParamA when u r inside this API... Trace with F8..., the nice box with music appear...., push Exit buttom.....u return in inside the API, continue tracing with F8 Buttom...u return inside the code of ReversMe at: .text:00402630 u see this piece of code: .text:004024E8 dd 6051BDB8h, 0FA39791Ch, 0B82E71D1h, 3B82D1BDh, 3C4C3939h, 0BDB83A4Dh .text:004024E8 dd 35493AD1h, 5FD13FD2h, 0D1BDB8D1h, 0D229493Ah, 0D15FD13Ch, 0A3D1BDB8h .text:004024E8 dd 4D39393Bh, 0B83B4C3Dh, 80CB0BDh, 0D2397989h, 0BDB8D13Ah, 393CB65Dh .text:004024E8 dd 0D2393939h, 4CBDB83Bh, 0D13B4D30h, 0D13A4D7Eh, 8851BDB8h, 0FA39791Ch .text:004024E8 dd 0B82E71D1h, 0FDBA69BDh, 0D13CD23Dh, 0BDB8D15Fh, 791A9981h, 0D23D4C39h .text:004024E8 dd 0B3BDB83Bh, 79A9BE24h, 203AD239h, 42E88481h, 75000002h, 81027404h, 92183084h .text:004024E8 dd 0C305EB42h, 848102EBh, 17BEE8h, 74047500h, 92848102h, 220E8h, 3603EB00h .text:004024E8 dd 0D03D8481h, 7C004025h, 8102EBCDh, 68006A84h, 403E71h, 848102EBh, 0E968006Ah .text:004024E8 dd 0EB000003h, 0FF848102h, 40ABD035h, 0E804EB00h, 0E8E88481h, 4CEAh .text:00402630 ; --------------------------------------------------------------------------- .text:00402630 jmp short loc_402635 .text:00402630 ; --------------------------------------------------------------------------- .text:00402632 db 0E8h ; F .text:00402633 db 81h ; Ã¼ .text:00402634 db 84h ; Ã¤ .text:00402635 ; --------------------------------------------------------------------------- Put ur cursor at offsett of this piece: .text:004024E8 dd 6051BDB8h, 0FA39791Ch, 0B82E71D1h, 3B82D1BDh, 3C4C3939h, 0BDB83A4Dh .text:004024E8 dd 35493AD1h, 5FD13FD2h, 0D1BDB8D1h, 0D229493Ah, 0D15FD13Ch, 0A3D1BDB8h .text:004024E8 dd 4D39393Bh, 0B83B4C3Dh, 80CB0BDh, 0D2397989h, 0BDB8D13Ah, 393CB65Dh .text:004024E8 dd 0D2393939h, 4CBDB83Bh, 0D13B4D30h, 0D13A4D7Eh, 8851BDB8h, 0FA39791Ch .text:004024E8 dd 0B82E71D1h, 0FDBA69BDh, 0D13CD23Dh, 0BDB8D15Fh, 791A9981h, 0D23D4C39h .text:004024E8 dd 0B3BDB83Bh, 79A9BE24h, 203AD239h, 42E88481h, 75000002h, 81027404h, 92183084h .text:004024E8 dd 0C305EB42h, 848102EBh, 17BEE8h, 74047500h, 92848102h, 220E8h, 3603EB00h .text:004024E8 dd 0D03D8481h, 7C004025h, 8102EBCDh, 68006A84h, 403E71h, 848102EBh, 0E968006Ah .text:004024E8 dd 0EB000003h, 0FF848102h, 40ABD035h, 0E804EB00h, 0E8E88481h, 4CEAh .text:00402630 ; --------------------------------------------------------------------------- and push the U buttom to make it undifined, for make it easy to analyse. Aftet that u got this listing:I give only a small part of code .text:00402616 db 68h ; h .text:00402617 db 0E9h ; T .text:00402618 db 3 .text:00402619 db 0 .text:0040261A db 0 .text:0040261B db 0EBh ; d .text:0040261C db 2 .text:0040261D db 81h ; Ã¼ .text:0040261E db 84h ; Ã¤ .text:0040261F db 0FFh .text:00402620 db 35h ; 5 .text:00402621 db 0D0h ; - .text:00402622 db 0ABh ; Â½ .text:00402623 db 40h ; @ .text:00402624 db 0 .text:00402625 db 0EBh ; d .text:00402626 db 4 .text:00402627 db 0E8h ; F .text:00402628 db 81h ; Ã¼ .text:00402629 db 84h ; Ã¤ .text:0040262A db 0E8h ; F .text:0040262B db 0E8h ; F .text:0040262C db 0EAh ; O .text:0040262D db 4Ch ; L .text:0040262E db 0 .text:0040262F db 0 put the cursor at 0040262B and push the buttom C to make the code clear ...u see after, this nice CODE: .text:00402628 db 81h ; Ã¼ .text:00402629 db 84h ; Ã¤ .text:0040262A db 0E8h ; F .text:0040262B ; --------------------------------------------------------------------------- .text:0040262B call DialogBoxParamA .text:00402630 jmp short loc_402635 .text:00402630 ; --------------------------------------------------------------------------- .text:00402632 db 0E8h ; F .text:00402633 db 81h ; Ã¼ .text:00402634 db 84h ; Ã¤ This is a smal hint for making the code easy to analyse and to find the OEP for dumping the true code. Another Hint: betwin every 81h84h or ??h81h84h??h there is a code to make it clear with C buttom. Good luk for everyone...and thanx a lot for lena.
deskyet 22. May 2007	I am learning a lot too of your vids lena, now I am watching video 18 and you learn REALLY SO MUCH... btw, because of your vids I made my first keygen for 'moofs keygenme'.
mrmag 28. May 2007	Hi Lena, hi everybody. This is a very nice ReverseMe which kept me busy for several hours now. I thought I had it, but then I figured I am might still be playing with Robin Hood, because to continue the algorithm wants to execute code from INSIDE the keyfile. Therefore my question: how to figure out which are the correct (probably 7 bytes) from the keyfile (because all I know right now is the sum of their opcodes)... So, my question is -- am I still in 'the woods'? ;) Regards, MrMAG (aka DuaneD)
lena151 Author 28. May 2007	Good work MrMag! No, you are NOT in the woods anymore. Keep going, almost there! The algo DOES indeed execute code from inside the keyfile itself..... And I am sure that if you figured this out so far, you'll figure out the rest too! Thanks for your time, I really appreciate it. Hint: I said the algo is short and easy, and that is really true. So, make it plain simple .... Best regards, lena151.
lena151 Author 24. Jun 2007	Seeing that there were quite a few people having difficulties solving this ReverseMe, and though it's not customary that the author writes a solution him/herself, I have made a solution myself in the form of a tutorial in flash. Hopefully, it can shed a little light on things ...

--=LEO=--'s ICEGOLD keygen #1

Download ICEGOLD_keygen_#1_by_--=LEO=--_aka_LEO.zip, 202 kb (password: crackmes.de)
Browse contents of ICEGOLD_keygen_#1_by_--=LEO=--_aka_LEO.zip

№№№№№№№№№№№№№№№№№№№№№№№№№№
№ III CCC EEE GGG OO L DD №
№ I C E G O O L D D №
№ I C EEE G GG O O L D D №
№ I C E G G O O L D D №
№ III CCC EEE GGG OO LLLL DD №
№№№№№№№№№№№№№№№№№№№№№№№№№№

------------------------------------------------------------------
ICEGOLD keygen #1 by --=LEO=-- aka LEO
------------------------------------------------------------------

1. This is a simple keygen me!
2. If you Crack it, then it false!
3. Make a keygen!!!
4. And tell me, how to....

-------------------------------------------------------------------
LEO30001@yandex.ru
-------------------------------------------------------------------

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 11. Feb, 2011
Downloads: 379

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Solutions

Solution by promix17, published 12. feb, 2011; download (30 kb), password: crackmes.de or browse.

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Solution by Zephy, published 12. feb, 2011; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

--=LEO=-- Author 14. Feb 2011	Thanks all, for crack is... Thanks Zephy and promix17 for the nice tut's and keygen!

Lesco's Assembler-Crackme 1

Download asm_cm01.zip, 3 kb (password: crackmes.de)
Browse contents of asm_cm01.zip

To improve my assembler skills, i wrote a little crackme for you.
I don't know, wether the level is right, but i hope so

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 06. Oct, 2005
Downloads: 1227

Rating

Votes: 10
Crackme is boring.

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Solutions

Solution by deroko, published 07. oct, 2005; download (7 kb), password: crackmes.de or browse.

deroko has rated this crackme as quite nice.

Solution by ultrasound, published 07. oct, 2005; download (5 kb), password: crackmes.de or browse.

ultrasound has rated this crackme as quite nice.

Solution by NoRG, published 07. oct, 2005; download (5 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

deroko 06. Oct 2005	heh nice one, really kewl trick =)
jB_ 07. Oct 2005	Nice trick :) This is a crackme for advanced beginners, I wouldn't have rated it 3. Let say 1.5, because of the trick. Good job Lesco :) Hope we'll see an other crackme written by you.
hpegar 08. Oct 2005	easy hugope 18443832585278
deroko 08. Oct 2005	wrong serial =)
giga 14. Oct 2005	Hpeqar you serial is soks :))
giga 14. Oct 2005	my serial is name=gigacracker serial=3092354E3092209E254aD40209e254A3ffa2FE6d40 My message is congrats, u did it !!! (Au deroko brate sto volim da zajebavam ove likove sto se kurce a nemaju pojma =)) ja sam moze se reci amater a tek oni pa oni bre nemaju pojma gde je ap0x da ih vidi umro bi od smeha)
TDC[NL] 16. Oct 2005	name: TDCNL serial: 1d2870D869a4344E2bf0 too easy

Lesco's a keygenme

Download kgme.zip, 12 kb (password: crackmes.de)
Browse contents of kgme.zip

Mission: Create a keygen, don't patch
No packers or crypto-algos were used. The checking algo is a bit 'special', but see yourself.
Happy reversing!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 31. May, 2006
Downloads: 728

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Solutions

Solution by barcode__, published 11. oct, 2006; download (49 kb), password: crackmes.de or browse.

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Discussion and comments

Lesco Author 06. Oct 2006	No solution for it after 268 downloads? Has anyone keygenned it? Does anyone need hints?
barcode__ 07. Oct 2006	No I am very close to submitting a keygen. Nice approach btw.
sd333221 09. Oct 2006	Haha gj lesco :-)
barcode__ 10. Oct 2006	keygen done will submit tutorial tomm or next day =) hope you don't mind horrible coding and a console keygen :P

Lesco's KeygenMe #2

Download KeygenMe_2.zip, 22 kb (password: crackmes.de)
Browse contents of KeygenMe_2.zip

This time you'll have to solve a little math problem. I didn't use any protectors and anti-debug stuff, since the focus of the crackme is the algorithm. The goal is to write a working keygen+explanation of the crackme.
There's only one rule: Don't patch!

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 11. Aug, 2006
Downloads: 619

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by baderj, published 19. feb, 2015; download (74 kb), password: crackmes.de or browse.

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Discussion and comments

divinomas 12. Aug 2006	Nice crackme.Here is my serial Name:divinomas Serial:0.1524?[X$2]_[X?0.6476]_16.5714
DeepBlue 20. Aug 2006	Nice Crackme. Here is my Keygen. ;) http://rapidshare.de/files/30135365/Keygen_src.zip.html mfg, DeepBlue aka +++ATH0
zairon Moderator 21. Aug 2006	Glad to see someone is working on this crackme but posting the final result (a valid combination or a keygen) doesn't help the community. Please, try to write a nice tutorial too...
AlexeyG 21. Aug 2006	an interesting keygenme, it's the 5th program I every looked at using a debugger. But a really interesting one. I got lost at figuring out the layout of the key. DeepBlues keygen sources give the answers to most questions I had, but still would like to see some tutorial, hope you can make one for us!
DeepBlue 21. Aug 2006	I already started writing a tutorial, but as a result of being very detailed at some locations in the keygenMe, it could take a while. Lesco has also made some remarks and pointed out an error in my keygen, which i hope i can solve. (thx lesco) Pls be patient. :)

LFalch's LFalch's 1st crackme

Download LFalch_s_1st_Crackme.zip, 4 kb (password: crackmes.de)
Browse contents of LFalch_s_1st_Crackme.zip

This is the first crackme I've made
It's not that hard to complete but it can be fun to do

Goal:
Make a keygen
Rules:
Don't alter any of the classes in the jar
Feel free to decompile the jar
Bonus Info:
The jar is obfuscated
The serial only consists of letters and numbers

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Java

Published: 12. Apr, 2013
Downloads: 432

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Solutions

Solution by warsaw, published 18. jun, 2013; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

LFalch Author 14. Apr 2013	Yay it's been approved
salacryl 15. Apr 2013	Nice Work. Yes easy, but not so obvious. A lot of fun and gimme something so learn. I didn't know what an obfuscator is. Thanks :)
LFalch Author 21. Apr 2013	Glad you liked it!
CrackerNoob^2 11. Nov 2013	I couldn't use ollydbg, what do you use?
Articstorm 28. Mar 2014	@crackernoob^2 you can use Jar2Exe and then use ollydbg or you use jd-gui and look there at the structure. i found the routine, but i have no idea how to make a keygen.
LFalch Author 28. Mar 2014	The goal is create a keygen. For that you'll need to use jd-gui or some other decompiler to see how it checks the codes.
iStefano 10. Jan, 15:43	Nice crackme! I solved it with keygen and with patch

LibertyorDeath's LibertyorDeaths ASM KeygenMe#1

Download LoD_ASM_KEYGENME#1.zip, 4 kb (password: crackmes.de)
Browse contents of LoD_ASM_KEYGENME#1.zip

Simple ASM keygenme my first one, the algo is nothing special i added one simple modification that might make it slightly more dificult ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 13. Aug, 2009
Downloads: 752

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by mjones, published 20. aug, 2009; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

VaZoNeZ 13. Aug 2009	Well, it was very easy)) Code crypt isn't a good protection. It was cracked by pressing F9 in Olly))
GioTiN 14. Aug 2009	here is your solution + tutorial Mirrors : http://www.zshare.net/download/LoD_ASM_KEYGENME#1.zip/64103798803c9b89/ http://dc97.4shared.com/download/LoD_ASM_KEYGENME#1.zip/124967070/f2d9d2b/LibertyorDeaths_ASM_KeygenMe1_Solution_UST.rar Bye , GioTiN // Under SEH Team
LibertyorDeath Author 16. Aug 2009	the code crypt wasnt meant to be a strong protection it was just a simple routine to throw of deadlisting lol nothing more ;)
bytos 18. Aug 2009	piece of cake keygen : http://www.zshare.net/download/LoD_ASM_KEYGENME#1.zip/642925509df7e00d/ tnx for this crackme
VaZoNeZ 19. Aug 2009	Oh! I forget - you have a bug, code crypted not until the end. ExitProcess call left uncrypted.
VaZoNeZ 20. Aug 2009	Also, Туториал на русском http://vazonez.org.ua/index.php?option=com_content&view=article&id=160:crackin-libertyordeaths-asm-keygenme-1&catid=34:cracking&Itemid=53
Toxide 29. Sep 2009	Fun little KeygenMe. I enjoyed playing around with it, thanks for posting. Hope you write some more Windows based crackmes. :)

LibertyorDeath's LibertyorDeath's Keygenme #3

Download Keygenme_v3.tar.gz, 4 kb

Serial protection with a couple of tricks added in nothing too special but an improvement from my first two.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 03. Aug, 2008
Downloads: 465

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Solutions

Solution by Yoha, published 14. feb, 2013; download (9 kb), password: crackmes.de or browse.

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Solution by lagalopex, published 27. aug, 2008; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

lagalopex 20. Aug 2008	You should solve some crackmes to get to know what level 3 means and how you can protect your cms more usefull. Although your ptrace is not a simple exit ;) But you will note my solution, when accepted, is short and quite simple... Level 2 describes it best: "Needs a little brain (or luck)". It was both for me!
LibertyorDeath Author 21. Aug 2008	Thanks for the input on this and yes you are right, only the third I have ever made. I have just been writing them as I learn C. I will get better with time this version was a lazy version where i just changed a few things around and added a couple of extras. Next version i intend on making better.

LibertyorDeath's LibertyorDeath's Linux Keygenme #1

Download keygenme1.tar.gz, 2 kb

My first keygenme should be pretty easy. When you make a solution email it to libertyordeath1776@gmail.com and i will send you the source but its nothing special. See readme in the archive for rules.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 15. Jul, 2008
Downloads: 532

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Solutions

Solution by Yoha, published 14. feb, 2013; download (4 kb), password: crackmes.de or browse.

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Solution by cert, published 22. mar, 2009; download (1 kb), password: crackmes.de or browse.

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Solution by scavenger, published 31. jul, 2008; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

gamma95 28. Jul 2008	pls check mail :D
blankwall 10. Feb 2014	Well theres a buffer overflow and i exploited that to get in does that count?
LibertyorDeath Author 17. Apr 2015	This is an old Keygenme and I am not very active anymore. So for anyone interested the password to the source archive is "liberty" all lowercase no quotes.

LibertyorDeath's LibertyorDeath's Linux Keygenme #2

Download keygenme2.tar.gz, 3 kb

Another simple linux keygenme hope somebody learns something,
forgive my poor coding skills.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 15. Jul, 2008
Downloads: 374

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Yoha, published 14. feb, 2013; download (5 kb), password: crackmes.de or browse.

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Solution by scavenger, published 03. aug, 2008; download (27 kb), password: crackmes.de or browse.

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Discussion and comments

LibX's InLinePatchMe #1

Download inlinepatchme1.zip, 10 kb (password: crackmes.de)
Browse contents of inlinepatchme1.zip

InLinePatchMe #1 coded in Visual Basic 6

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 28. Oct, 2003
Downloads: 1043

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Solutions

Solutions

Solution by [xorolc], published 14. jul, 2014; download (2 kb), password: crackmes.de or browse.

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Send a message to LightPhoenix »

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Discussion and comments

ideku_nih 14. Mar 2011	i don't know how to make keygen with -42-3970 ?? try this way, change with HexEditor address swaps (H)317D/12669 00 -> FF (H)3194/12692 00 -> FF (H)397C/14716 FF -> 00 enter register with any code then try click the hide button.
LightHash Author 15. Mar 2011	hint: you're username's ascii codes will be blend with mine's to calculate the actual serial

Download LightPhoenix_crackme_#1.zip, 76 kb (password: crackmes.de)
Browse contents of LightPhoenix_crackme_#1.zip

I'm glad to join crackmes.de. This is my first crackme, plz solve it."

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 24. Jun, 2005
Downloads: 405

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Solutions

Solution by bottonim, published 13. oct, 2015; download (20 kb), password: crackmes.de or browse.

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Discussion and comments

Coderess 13. Oct 2015	Greate news bottonim I will read your solution with pleasure but a little bit later :)

lilcw's just a simple xor encryption

Download crackme.zip, 7 kb (password: crackmes.de)
Browse contents of crackme.zip

get the magic keyword!
all you need to do is find the password =]

and yes its tested and its working fine!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 28. Sep, 2007
Downloads: 564

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Solutions

Solution by simpleuser, published 09. oct, 2007; download (3 kb), password: crackmes.de or browse.

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Solution by MR.HAANDI, published 03. oct, 2007; download (425 kb), password: crackmes.de or browse.

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Discussion and comments

XzzX 28. Sep 2007	You can assemble everything you want at 4012DB with the right password. So how should I find out what you want? Since you use the password for encryption commonness analysis won't help either. ec2b8a6264 as string assembles "call ExitProcess".
lilcw Author 28. Sep 2007	anything isnt correct at all you only got the chars you can insert with your keyboard and just 1 pw shows a msg ;]
TiGa 28. Sep 2007	This is why the difficulty was reduced from 9 to what it is now, because of all the "workaround" solutions possible.
XzzX 28. Sep 2007	Oooh i can input many chars via alt+num ;-) So if you tell me what you want I can tell you the corresponding password. ;-)
lilcw Author 28. Sep 2007	like i said: get 'the magic keyword' just try to find it =]
sd333221 28. Sep 2007	Is it longer than 4 chars? I maybe write a bruteforce solution if not.. Because 4 chars lowercase+numbers are already approx. 2.560.000 possible Solutions, no chance to bruteforce something like 6 characters
sd333221 28. Sep 2007	>and just 1 pw shows a msg I don't think that... :-)
MR.HAANDI 28. Sep 2007	haha, too easy, and the author actually thinks that nobody will ever (whenver ever) know anyway ;) to solve this you don't need to bruteforce.
MR.HAANDI 28. Sep 2007	*btw I think I will describe the author's mistakes in a detailed tutorial ;)
sd333221 28. Sep 2007	MR.HAANDI, I think I know what you mean, but does your key consist of letters from a-z & 1-9? Greetings
sd333221 29. Sep 2007	Did you search for the password by looking for the known pattern to the jump to? "push 0" "Call messageBox"
MR.HAANDI 29. Sep 2007	yes, that is exactly the right point to start ;)
lilcw Author 29. Sep 2007	hmm actually u dont need to bruteforce since those ppl rated it level 3 i gave some hints that will allow to solve it without any bruteattack pw is 18 chars a-z 0-9 only ;]
lilcw Author 29. Sep 2007	mr.haandi: i removed your entry since i dont think we want to spoil too much at all ;]
human_thought 30. Sep 2007	typical smc crackme with key used in decryption. nice attempt though,i suppose you just need to form a messagebox,which is pretty trivial. Smc along with seh really can create great protections, watch at +q's references for that purpose.
lilcw Author 30. Sep 2007	what does smc mean ?
cyclops Moderator 30. Sep 2007	smc==self modifying code!
lilcw Author 03. Oct 2007	MR.HAANDI: congrats =] want one crypted with the other options enabled? like encryption of the original app, iat faking and some anti debugging?

lilcw's simple xor encryption #2

Download crackem2.zip, 5 kb (password: crackmes.de)
Browse contents of crackem2.zip

well how to solve it?

1st of all you will have to dasm it
to take the decrypting engine
and to bruteforce the correct password which is a combination of lowercase letters and numbers (9 chars this time ;)
after that you will have the main decrypting routine that will decrypt the main app.

since ppl said #1 was too easy here i go with the real algo thats used and not the testing one

again no encryption of the main code or any antidebugging stuff in there! just plain code inside of it =]

the encrypted programm again is a simple msgbox.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 19. Oct, 2007
Downloads: 502

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Solutions

Solution by Rain [Cls], published 16. feb, 2012; download (5 kb), password: crackmes.de or browse.

Rain [Cls] has rated this crackme as quite nice.

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Discussion and comments

lilcw Author 24. Oct 2007	no solution yet? :/
simpleuser 27. Oct 2007	tried several stuff. no success yet. sounds like bruteforcing will be the only solution... just MsgBox + ExitProcess calls into such a big buffer, it could be anything... not as fun as #1.
MR.HAANDI 29. Oct 2007	indeed, this can only be broken knowing how the protector deals with the input. (only then you don't need to bruteforce at this crackme). - I only could solve it with this knowledge, maybe the author should give some more help ;)
lilcw Author 30. Oct 2007	well the decryptor for the main app is hiding in the encrypted area ;]
Lightning 30. Oct 2010	I took a look at this crackme. In theory it could be broken by giving non-standard characters into the input but then you are only rewriting the code that is ran. In an attempt to get the encrypted area to reveal the password I did a search for any number of characters that when xor'd against lower case and numbers would reveal normal text. Assuming that the end character is null, only 1 spot in the encrypted text showed up. Sadly, xor'ing a value into the last character to get a null then backing up 9 characters (based on above info) results in untypable characters. Either the decrypted portion contains no strings or the decrypted portion does another decryption internally resulting in no point of reference to determine the original password used.
andrewl.us Moderator 16. Feb 2012	CONGRATS to RAIN - this is a long-standing crackme that had many minds against it! I don't understand why choosing the first 9 characters of the crypted buffer as a trial password (and replacing non-printable characters with dash '-') is useful, but here it reveals (via luck??) that loop instruction at 405461 and 405481. MANY password could have put an 0xE2 opcode somewhere in the buffer. Maybe Rain just has that cracker ZEN!
0xFFh 18. Feb 2012	Excellente tutorial Rain. ;)
lilcw Author 13. Apr 2012	now im finaly impressed well done Rain [Cls] =]

Little_Brother's Key4LilBro #1

Download Key4LilBro_#1.zip, 5 kb (password: crackmes.de)
Browse contents of Key4LilBro_#1.zip

This is my first keygenme for this site so make me proud guys. :)

If the response is good I'll be happy to write more.

Make me a keygen and write a tutorial.

You may patch or whatever you like to gather info but keygen must work with the original .exe.

There is no packing/anti-debugging or any other type of protection.

This one's for the n00bs. IMO anyways.

Enjoy :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 16. Sep, 2007
Downloads: 701

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by chaise, published 20. sep, 2007; download (32 kb), password: crackmes.de or browse.

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Discussion and comments

br0ken 17. Sep 2007	My keygen prints 1 instead of 001. I don't know how to fix this. I guess i'll wait some solutions.
Little_Brother Author 17. Sep 2007	keep at it br0ken, you'll get it. :)
skapunky 19. Sep 2007	Yeah! Interesant crackme, i send solution now. :)
br0ken 20. Sep 2007	My keygen has problems with characters whose ASCII value ends in a 0. Nice algo though, looking forward to your solution, skapunky.
Little_Brother Author 20. Sep 2007	well broken if you would like Id be happy to help you. Send me what you have in a PM I'll walk you through it.
IMPosTOR 20. Sep 2007	i do this. umm i found algorithm.try to makekeygen & tut
Little_Brother Author 20. Sep 2007	Nice tut chaise. And keygen works on my end. Well done! I hope you enjoyed it.
deskyet 21. Sep 2007	ha, easy I cracked it yesterday evening. Took me 1 hour, also because its been 5 months ago i was in reversing.
Little_Brother Author 21. Sep 2007	Yes, I would agree with you. That's the reason it is a level 1. 122 downloads and only one vote?!?! :( Cmon guys.
TiGa 29. Feb 2008	Video solution by DrPepUr in the crackmes.de section of the RCE Video Portal: http://video.reverse-engineering.net/index.php?cat=16

LockpicKa's BLACK!OPCODE

Download Black_Opcode.zip, 22 kb (password: crackmes.de)
Browse contents of Black_Opcode.zip

Write a keygen.
Tutorial must show how you defeated protection.

Difficulty: 6 - Hard, for very professionals only
Platform: Windows 2000/XP only
Language: Assembler

Published: 10. Nov, 2005
Downloads: 830

Rating

Votes: 7
Crackme is nothing special.

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Solutions

Solution by deroko, published 13. nov, 2005; download (15 kb), password: crackmes.de or browse.

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Discussion and comments

deroko 10. Nov 2005	very nice crackme... just to get 4th keycheck working and I'm done =)
deroko 10. Nov 2005	yah solved, keygen working, just to write a little bit about protection =)
deroko 11. Nov 2005	huh, I didn't know that this is going to be so much writing, solution submitted...
MaxM 11. Nov 2005	No doubt it crashes on 98 -you set the image base directly in DOS area ('98 uses the area below $4).
konstAnt 11. Nov 2005	Yah crashed on my 98 too... I have recently installed 98 and so sorry that I couldn't try the new crackme which is rated so high....
deroko 11. Nov 2005	did you read readme.txt before complaining?
MaxM 11. Nov 2005	I'm not complaining -just observed this when opening it in LordPE. It's quite hard, I don't think I can solve it -anyway, anti-shadowed Olly check too, i'm delighted :)
bigboss1988 11. Nov 2005	i got OEP .. Why doesn't run on Olly and IDA ? deroko r u cracked it by Soft-ice? ;)
MaxM 11. Nov 2005	?? I'm commenting the key-checks in IDA right now. Dump it in Olly and then analyse it in IDA. @konstAnt: want the dumped file in rapid for opening it in IDA? With commented database? ;)
MaxM 11. Nov 2005	unless u have wxp, of course.
deroko 12. Nov 2005	@bigboss1988, nah, mostly by ida...
MaxM 13. Nov 2005	yeah, lvl 6 was a bit too high... good work, anyway.

LockpicKa's WHiTE OPCoDE

Download WHiTE.zip, 13 kb (password: crackmes.de)
Browse contents of WHiTE.zip

Find the valid serial(s).
Good luck :)

Tested on windows XP only!

You might need this:
http://java.sun.com/j2se/1.4.2/download/WHiTE.zip.html

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: Java

Published: 10. Dec, 2005
Downloads: 1326

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by MadNemesisDog, published 19. dec, 2010; download (99 kb), password: crackmes.de or browse.

MadNemesisDog has rated this crackme as awesome.

Solution by warrantyVoider, published 26. dec, 2005; download (13 kb), password: crackmes.de or browse.

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Send a message to logan »

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Discussion and comments

LockpicKa Author 11. Dec 2005	Nice Job :) Gonna write a tute?
warrantyVoider 11. Dec 2005	I donÂ´t have the time right now but IÂ´m sure someone will, solving this one is a lot of fun.
Zarathu 12. Nov 2006	This is my first CrackMe... I assume we're allowed to use a decompiler?
zairon Moderator 13. Nov 2006	Zarathu, you are allowed to use everything you need in order to solve it :)
MadNemesisDog 19. Dec 2010	I think my tutorial speaks for itself. thx LockpicKa for the entertaining crackme :) ...this was my first keygen ever ^^
zaabz 25. Dec 2010	My AV says the download is infected with win32_polycrypt? :O
MadNemesisDog 27. Dec 2010	AdAware says nothing like this, i think my system is clean and i havent infected the files on my own. Maybe your AV is too sensitive? Got anyone else this problem too?
dittirik 13. Feb, 21:04	Tutorial : https://www.youtube.com/watch?v=u3RwvOURJSk

logan's CrackmeV5

Download CrackmeV50DLL.zip, 35 kb (password: crackmes.de)
Browse contents of CrackmeV50DLL.zip

Another one of my many Crackmes
Good Luck :)
(I Forgot, No Patching)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 01. Nov, 2005
Downloads: 967

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by D4ph1, published 03. nov, 2005; download (25 kb), password: crackmes.de or browse.

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Solution by TELOPHASE, published 03. nov, 2005; download (40 kb), password: crackmes.de or browse.

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Discussion and comments

TELOPHASE 01. Nov 2005	2 small problems :- 1) There are 2 exe's in the zip file and a dll. Which exe is the one to be cracked ;) 2) You havent specified whether You need a keygen or just serial ????
Lesco 01. Nov 2005	1) These exe files have the same hash (md5 and sha1) so they seem to be the same 2) I think a keygen is the goal
TELOPHASE 01. Nov 2005	Constraints :- 1) Name = 5 chars only 2) serial = 11 chars (XXXXX-XXXXX) Name: TELOP Serial: `SW\T-ZMQVN If i get time will work on the keygen soon ;)
TELOPHASE 01. Nov 2005	Keygen ready & done , PM Send to logan ;)
logan Author 06. Nov 2005	TELOPHASE Good job I have got your PM

logan's CrackmeV6

Download CrackmeV6.zip, 7 kb (password: crackmes.de)
Browse contents of CrackmeV6.zip

-=>Warning:
-=>File may and probably will close any dangerous(Debuggers, Disassemblers and others) softwares.
-=>Please use this file with cautious, I am not responsible for any kind of data
-=>lost or file demage that beening caused by this file.
-=>File may and probably will close Internet Explorer.

Notes:
If I had more power I could made this crackme more efficient,
Crackme starts a bit slow.
This is one annoying crackme ;).
I hope you will have fun cracking it.

This crackme is more about killing the things that helps you crack
then super special algorithm.

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 13. Jul, 2006
Downloads: 678

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Solutions

Solution by cyclops, published 02. dec, 2007; download (29 kb), password: crackmes.de or browse.

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Discussion and comments

thehyper 14. Jul 2006	Nice crackme. I have written a keygen :)
logan Author 15. Jul 2006	well then submit it :] lets see it
Shism 15. Jul 2006	Nice anti-debug.. Don't know how it works
TQN 16. Jul 2006	It uses Toolhelp32 API to list processes and find some DLL inside them, example: 'GENOEP.DLL','PEID.exe','WIN32_USER.PLW','IDA.WLL','VCLX60.BPL', 'VCL60.BPL','RTL60.BPL','WINCE_STUB.PLW','IDAG.EXE','OllyICE.exe', 'OllyDBG.exe','OllyScript.dll','OllyDump.dll','Loaddll.dll','CMDLINE.dll','BOOKMARK.dll','DBGHELP.DLL','HideOD.DLL'. By this way, the crackme can detect IDA and OllyDbg.
EvOlUtIoN 18. Jul 2006	To avoid the debugger protection you only have to attach it after start and then you can study algo without problems.. ;-)

logan's Crackme V4

Download crackme.zip, 36 kb (password: crackmes.de)
Browse contents of crackme.zip

This is my new and improved crackme :]
Good Luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 14. Oct, 2005
Downloads: 1145

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by ByteCaper, published 17. oct, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by NoRG, published 17. oct, 2005; download (2 kb), password: crackmes.de or browse.

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Send a message to Lone.Wolf »

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Discussion and comments

bigboss1988 14. Oct 2005	i make all can i do :)
logan Author 14. Oct 2005	bigboss1988 Good luck :}
logan Author 14. Oct 2005	did someone solve it?
Lesco 14. Oct 2005	i am trying to find a better solution than bruteforcer to find a value that fits all three conditions
logan Author 14. Oct 2005	dont bruteforce it thats lame think, if you want my tip start from the last condition
r0bert 16. Oct 2005	this can be solved with highschool math, but seriously, if this type of protection was used in the real world, it would be the type to be bruteforced or cracked(patched), rather than keygenned..
ByteCaper 16. Oct 2005	Bruteforcing this little crackme would be trully an overkill and since I'm pretty sure that there is only one right password that will get the job done making a keygen is of no use. I have submitted a solution to this little crackme and I hope it will be here soon :-)
D4ph1 16. Oct 2005	ByteCaper, it hasn't only one right password of course!As r0bert said its a kind of mathematic problem!Im working on keygenerator right now but some loops are crashing the prog! logan this last condition is a headache! :)
logan Author 16. Oct 2005	The real world would patch every program if it could... but here we have rules, such as: No Patching!!! No Bruteforcing!!! No shitting on the computer :]
NoRG 16. Oct 2005	D4ph1, here can be only one password. This cracme can be solved with pen and paper in 5 minutes.
logan Author 17. Oct 2005	NoRG and an ascii table :] look the three conditions makes it only one password but I dont know mabye you can find a second solution
logan Author 18. Oct 2005	people if you can please vote before I got crazy please just one more vote :[ I want to know what you think about my crackme
logan Author 03. Nov 2005	bbvv I saw that and Im very sorry because I lost the source so I cant fix it... sorry...

pxor 31. Oct 2009	is this crackme keygenable ? past some serial plz :P
cobrasniper555 01. Nov 2009	It's keygenable. I would assume it's almost a type of bruteforce keygen. A value of the username is calculated and a second value of another calculation of the entered serial is compared and if not the same = badboy. Good luck!
Lone.Wolf Author 01. Nov 2009	you're right cobrasniper555 except there is no badboy :P
cobrasniper555 01. Nov 2009	True. That makes it a bit fun. Without any spoilers, I'd have to say that the second calculation (Entered Serial) has to be bruteforced of sorts.
pepelux 03. Nov 2009	Some name - serial valids :) bxbxsx - 2x9x9x2x bxcxcx - 2x6x9x2x bxcxsx - 2x5x9x2x bxcxCx - 2x8x9x2x bxcxSx - 2x7x9x2x bxbxsx - 2x9x9x2x I programmed a .NET app to obtain combinations
pepelux 03. Nov 2009	in serial you can change x's by 0's or any number

Lone.Wolf's Breakdown!

Download breakdown.zip, 16 kb (password: crackmes.de)
Browse contents of breakdown.zip

Everything is allowed.
For elite crackers: Try to write a keygenme for this!

Hint: "Its not a bug - its a feature" ;)

I wish you good luck

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 26. Sep, 2009
Downloads: 382

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Solutions

Solution by |sas0|, published 25. aug, 2016; download (39 kb), password: crackmes.de or browse.

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Send a message to lord »

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Discussion and comments

Lone.Wolf Author 30. Sep 2009	Has anyone solved it yet? Or better to ask - could anyone debug it? =] best regards
qpt^J 03. Oct 2009	Everyone could debug it :) There are only anti-int3 breakpoint protection, So we can set hw breakpoint :) I view serial checking and have a question. Is it works for all names?
Lone.Wolf Author 04. Oct 2009	yes it works for all names. you just have to find / calculate the right value for the name because no one has broken it yet im gonna give another hint: for both inputs there will be values calculate by 2 different functions. the values have to be the same AND < 4 for a valid registration. i think its nearly impossible or unlikely to break it. but i wish you good luck ;) best regards
apuromafo 01. Nov 2009	i wish breack, but not have coalision in two funtions, i whish see some time the coalision in xor funtion 1 and funtion 2 name up 4, serial up 12, i can debug, edit , my tut is in spanish, i will post when have some time, about where nop. maybe title of my tut will be breacknoped.. see ya Apuromafo Chile. i was see this yesterday, but have many days..ohh..nice crackme, but my time is low. see ya. i will post in this week the txt.

lord's Easy crackme 2

Download cm1eng.gz, 362 b

Find the password
no patching!! :)

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: Assembler

Published: 04. Apr, 2006
Downloads: 1938

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by _pNg, published 19. jul, 2006; download (53 kb), password: crackmes.de or browse.

_pNg has not rated this crackme yet.

Solution by sinick, published 18. apr, 2006; download (1 kb), password: crackmes.de or browse.

sinick has not rated this crackme yet.

Solution by belesbsd, published 18. apr, 2006; download (2 kb), password: crackmes.de or browse.

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Solution by v4mp1r3, published 08. apr, 2006; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

astigmata 07. Apr 2006	the moderators are busy ? I sent my solution
TWiST 07. Apr 2006	Hehe No executable files huh :p. I hope the moderators will submit my solution :-)
zairon Moderator 08. Apr 2006	Hi. To astigmata: 1. Moderators have their own real life, they don't live waiting for crackmes and solutions... 2. The crackme was approved on 4 April. You did submit your solution on the same day but we should give a try to others so I (we) am waiting for other solutions; when we will have some solutions we'll decide which are the best. Hope you'll understand. Regards.
cli3nt 14. Apr 2006	"Find the password no patching!! :)" ...
godhack 01. May 2006	let me look at it!
heraton 24. Dec 2012	I did like the crackme. When you are done, try to patch it for a different password of the same length for extedet fun (still easy)
2Rabbit 16. Jul 2015	Fun, easy, nice

lord's easy linux crackme

Download blah.tar.gz, 362 b

crackme will print text under certain conditions
what are the conditions? ;) sorry for my bad english

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: Assembler

Published: 21. Sep, 2004
Downloads: 2261

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by _pNg, published 23. may, 2005; download (82 kb), password: crackmes.de or browse.

_pNg has not rated this crackme yet.

Solution by rayden5, published 05. oct, 2004; download (942 b), password: crackmes.de or browse.

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Solution by kRio, published 22. sep, 2004; download (803 b), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 22. sep, 2004; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

cli3nt 17. Mar 2006	hrhrh lord i dont know that u upload this here [;
huz124 04. Sep 2012	something to do with gid :)
heraton 24. Dec 2012	@huz124: Thanks for spoiling. Crackme is very, very easy. Anyway i like the "method of protection".
vendramini 06. Feb 2013	That was an easy one, thanks for uploading.

lordbyte's test3

Download test3.zip, 14 kb (password: crackmes.de)
Browse contents of test3.zip

lordbyte' s famous crackme

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jul, 2002
Downloads: 828

Rating

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Solutions

Solution by arash, published 11. jul, 2002; download (14 kb), password: crackmes.de or browse.

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Send a message to lord_Phoenix »

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Discussion and comments

lord_Phoenix Author 07. Apr 2006	http://omega.intechhosting.com/~access/forums/index.php?showtopic=3028&view=getnewpost ^ little discussing thread ^ cheerz..
l0calh0st 07. Apr 2006	We nned to register first :P..........Anyway nice work my lord;)....i m pulling my hair out :D
TQN 08. Apr 2006	Apply my newest MASM32.sig and CryptoSig of Cauchy/HBT Team, the code will more clearer. I saw in your code have two swich case for WM_CTLCOLOREDIT. I am wrong or it is your redundant code.
lord_Phoenix Author 08. Apr 2006	it's my fault with WM_CTLCOLOREDIT %) but try to concentrate on serial checking proc =) btw i want to see ur masm signs.. where can i get it ? cheerz..
TQN 08. Apr 2006	http://forum.exetools.com/attachment.php?attachmentid=4188
lord_Phoenix Author 09. Apr 2006	crackme is solved ! congratz, mario/MBE waiting while someone write a good tute =) cheerz..
Ox87k 03. Aug 2006	07/04/06 - 225 downloads and only 1 keygen nothing tutorial/solutions or source.. I'm going to write a tutorial for it if lord_Phoenix wants! =)
lord_Phoenix Author 03. Aug 2006	write it, bro ;)

lord_Phoenix's CrackMe #6

Download crackme.6.other-rev.zip, 106 kb (password: crackmes.de)
Browse contents of crackme.6.other-rev.zip

Yeah, another crackme =) Now without crypto, coz i have some non-crypto ideas.. Try this one.
Solution == keygen or patch ( all serials are kicked off )
Send ur solution to lord.Phoenix.revenge@gmail.com

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 09. Jun, 2006
Downloads: 1517

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by deroko, published 14. jun, 2006; download (81 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 09. Jun 2006	wow! Cool gfx and very bastard tricks! but... i understand the algo only seeing the right serial!!!!! I think that the program get the hex value of every char of the name except of the last one and put in in inverse order. At last it makes the sum of every char's name and obtain the first value of serial. Something like this: Ox87k 417(sum)37('7')38('8')78('x')4F('O') = 4173738784F Is my thought right? :D Thanks!
Ox87k 09. Jun 2006	sorry... get the hex value of only first 4 char's name!
Ox87k 10. Jun 2006	another sorry for multiples post but ur crackme seems to have a bug with name's lens > than 20 chars.. is it right?
lord_Phoenix Author 10. Jun 2006	hm.. u're right in some ur thoughts =) try to understand algo from code, not using deduction =)
Ox87k 10. Jun 2006	i don't understand how to bypass the tricks.. so for this reason i used deduction :P some helps for bypass they??
lord_Phoenix Author 10. Jun 2006	do u see int3? do u see SEH? =)
Ox87k 10. Jun 2006	hum... yeah but is a jungle :\| damned!
lord_Phoenix Author 10. Jun 2006	see in deeps of my handler and... =) coz if algo would be more complicated - ur deduction method wont work ;)
Ox87k 10. Jun 2006	my method works only if the name has len < than 20 chars. i try to understand ur crackme.. however very g00d j0b! ;)
Slip 11. Jun 2006	hehe =) preved, krasavcheg !
takada 13. Jun 2006	a simple crackme with little trick I only patch 1 byte at 00402149 /75 09 JNZ SHORT crackme.00402154 Yeah, this crackme is good
deroko 13. Jun 2006	I think you should patch p-code, not interpreter =)
lord_Phoenix Author 14. Jun 2006	http://omega.intechhosting.com/~access/forums/index.php?act=Attach&type=post&id=2017 deroko :: submit it here %)
deroko 14. Jun 2006	submitted same day as the one at arteam forum, still waiting for approval :)
Ox87k 14. Jun 2006	deroko, great solution! i now understand all :) lord_Phoenix very g00d crackme even if my keygen with my deduction works perfectly ;)

lord_Phoenix's CrackMe #7

Download crackme.7.other-rev.zip, 56 kb (password: crackmes.de)
Browse contents of crackme.7.other-rev.zip

Hmm.. I supposed this crackme would be a crypto crackme, but then I changed my mind. But I promise that the next crackme will be crypto crackme :D Try to solve this one before the next..

Solution == keYgen | NO BRUTEFORCiNG (if u would think that something need to be brutefroced, i can say that _everything_ needed for keYgen is in crackme.)

I hope u will enjoy it!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 13. Jul, 2006
Downloads: 1723

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Guetta, published 04. dec, 2006; download (85 kb), password: crackmes.de or browse.

Guetta has rated this crackme as quite nice.

Solution by Ox87k, published 19. jul, 2006; download (246 kb), password: crackmes.de or browse.

Ox87k has rated this crackme as quite nice.

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Oorja-HalT 28. Jul 2005	The key contains a part of the MD5 of username . MD5 of that part xored with another equal length part of the key must contain a particular string and finally a part of MD5 of the both the parts concated gets you the final part of the key Gosh anyone in for this bruteforcer
lord_Phoenix Author 29. Jul 2005	U r on the right way, but if u'll use some crazy dedictous methods - it can be cracked without bruteforcer ;)
lord_Phoenix Author 29. Jul 2005	Congratz to Renno [HTB] - first man who cracked it! p.d. Renno also was first who crackde #1
Oorja-HalT 01. Aug 2005	Can i have the solution please
lord_Phoenix Author 09. Aug 2005	U need his keygen or tutor? Renno said that he writes only in polish..
Oorja-HalT 09. Aug 2005	i need the tutorial maybe i can get it translated in english
lord_Phoenix Author 10. Aug 2005	I can give u src of Renno's keygen with comments in polish and that's all. Bcoz Renno didn't write any tutor :( i wanna ask him to do it, but..
Oorja-HalT 10. Aug 2005	thats ok i guess
lord_Phoenix Author 21. Aug 2005	thna try my third crackme, plz =)
_khAttAm_ 22. Aug 2005	Oh lord Many of my crackmes are unsolved too............... What can we do about that rather than waiting.........
lord_Phoenix Author 22. Aug 2005	=) and nobody can't ask for even little help..
lord_Phoenix Author 02. Nov 2005	congratz ,bilbo! try the third one now..

lord_Phoenix's lord_Phoenix Crackme #3

Download CrackMe#3.by.lord_Phoenix.zip, 75 kb (password: crackmes.de)
Browse contents of CrackMe#3.by.lord_Phoenix.zip

!!!IT PACKED WIHT MEW!!!
Another crackme by myself :)
It don't look like #1 and #2. And i think it's more harder.
Read .nfo for details...

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 27. Jul, 2005
Downloads: 3876

Rating

Votes: 6
Crackme is boring crap.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

lord_Phoenix Author 12. Aug 2005	Will someone crack it?
lord_Phoenix Author 21. Aug 2005	..nobody.. %( why, why, why?
lord_Phoenix Author 22. Aug 2005	iF U NEED HELP THAN MAiL ME!!
Ox87k 22. Aug 2005	for unpack no problem... i don't know where to attach it! lol!
lord_Phoenix Author 25. Aug 2005	Great respect to Knight and Ox87K for trying this psycho shit =) For any help and/or some tips mail me..
NoRG 30. Aug 2005	50000 md5compress? I not sure I can solve this baby.
lord_Phoenix Author 03. Sep 2005	Yeah it's shit to make bruteforce process more crazy %)
lord_Phoenix Author 09. Sep 2005	if someone wants to know the right pass - mail me..
lord_Phoenix Author 09. Sep 2005	mail me..and i will say u right pass
Knight 09. Sep 2005	But then there won't be no fun :) I'm too busy to finish it at the moment, but one day... Regards
lord_Phoenix Author 09. Sep 2005	no fun? so i willn't say the pass to u - crack urself =) but for newbiez or adv. and other who tried and failed i will say..
lord_Phoenix Author 17. Sep 2005	i say the correct pass to Shizm? maybe he wil write some tutor =)
Shism 17. Sep 2005	lol nope :)..... I just wanted to know the password lol but i dont want to make a tutorial lol
SasukeHa 19. Sep 2005	I did it :] and uploaded nice one phoenix
SasukeHa 20. Sep 2005	why my crack was reject? i should make tutorial for patching? or patching wasn't allowed? (readme never said it doesn't it says crack it)
zairon Moderator 20. Sep 2005	Hi. When we reject/approve something the system sends you a mail with the comments. You should check your mail. We need a detailed tutorial btw :)
lord_Phoenix Author 21. Sep 2005	i see some body-moves? it's good =) Shism :: lol ;P SasukeHa :: mail me..
lord_Phoenix Author 21. Sep 2005	if ur pacth work than it's correct solution ;) mail it to me..
SasukeHa 21. Sep 2005	i sent it to your email give me more "impossible" stuff tell me if you didn't get my email
lord_Phoenix Author 01. Oct 2005	i dinn't get ur mail =)
SasukeHa 02. Oct 2005	sent it again to lord_phoenix@mw.com.ru
lord_Phoenix Author 02. Oct 2005	or try to send it to lord.Phoenix.revenge@gmail.com
lord_Phoenix Author 08. Oct 2005	and he mysteriously disappeared =)
lord_Phoenix Author 08. Oct 2005	SasekeHa :: or use pm on crackmes.de
lord_Phoenix Author 09. Oct 2005	or maybe moderators can show his tutor?
scarebyte 11. Oct 2005	pls do not spam every day .. thx
lord_Phoenix Author 11. Oct 2005	sorry, simply SasukeHa disappeared and maybe he solved crkme, it mustn't be hided =) sorry..
scarebyte 11. Oct 2005	but your both have a mail or discuss about in irc
bilbo 28. Oct 2005	At the moment I see only two ways to solve it: reversing 0x50001 md5()'s - as NoRG pointed out; cracking Idea with a known plaintext attack; both approaches are obviously unfeasible... I think I'm missing something bilbo
Shism 28. Oct 2005	I really don't think you are..
Shism 28. Oct 2005	Try my uncracked crackme... And find the secret to cracking... PLEASE

lord_Phoenix's REVENGE Official Trial KeygenMe 2006

Download official.trial.crackme.2k6.crackme-rev.zip, 133 kb (password: crackmes.de)
Browse contents of official.trial.crackme.2k6.crackme-rev.zip

Yeah.. We are proud to present you our Official Trial Crackme 2k6.
It's not very hard, btw solution = keYgen. When you will solve it - you should mail us.
And remember, it's trial crackme, so you have no rights to publish solution in any forms of media,
you can't show it even to your friends, pets, etc. :P
ps. Read .nfo for little more info..

For now REVENGE is actively recruiting new members. So if u have skills and think taht u can be a good member of not so bad crew( ;P ) - it's for u ;)

All solutions+little resume(describe ur proffessional skills,etc.) should go to misericorde@rambler.ru or lord.Phoenix.revenge@gmail.com

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 01. Jul, 2006
Downloads: 994

Rating

Votes: 9
Crackme is nothing special.

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Solutions

Solution by boonz, published 23. may, 2007; download (200 kb), password: crackmes.de or browse.

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Discussion and comments

Tenshi 21. Sep 2006	on debugging it makes memory errors is that normal ? i have unpacked how its told in .nfo greets
HMX0101 21. Sep 2006	that's because it have smc (self modifying code) :) i have solved it, sometime ago...
lord_Phoenix Author 21. Sep 2006	smc is here, yep ;) but i was drunk, etc. when setted four-level of difficulty.. it's more easier %)
kaiZer-by 21. Sep 2006	it is not an easy crackme by lord_Phoenix. Previous crackmes was an easy. Thank you, lord_Phoenix!
HMX0101 21. Sep 2006	it's easy if you know basic crypto :P hehe
kaiZer-by 22. Sep 2006	4 me it's not an easy!
Guetta 10. Dec 2006	easy to find a serial/name, but not so easy to keygen ;) I'll try to make a keygen soon. Thx lord_Phoenix
kaiZer-by 12. Dec 2006	Guetta, do you have a serial for your name? If you have, please send it me!
Ox87k 12. Dec 2006	wtf?! kaiZer-by, isn't u able to find a valid serial for ur name?
Guetta 12. Dec 2006	Sorry KaiZer-By, I can give u some hints, but not a serial, it will not be appreciated for a trial, I think...
kaiZer-by 13. Dec 2006	0x87k, I can't find a valid serial for my name!.. too bad! =)
Ox87k 13. Dec 2006	'cmon it isn't too hard! Phoenix said us that was drunked when he setted 4 as level! Study the basic of crypto (rsa, md5, base64 :P) and apply it here.. ;)
kaiZer-by 16. Dec 2006	0x87k, yes, I know it! Maybe I'll study the BASiC of crypto.. maybe (if i'll have some time).
mucki 23. May 2007	I thought it is not allowed to post a solution
zairon Moderator 23. May 2007	Yes mucki. I'll contact the author and I'll let you know.
lord_Phoenix Author 23. May 2007	* TRiAL iS EXPiRED *
boonz 23. May 2007	I'm sorry for the inconvenience...
zairon Moderator 23. May 2007	No problem :)
andrewl.us Moderator 06. Apr 2008	What are "Cauchy's Cryptsig" mentioned in boonz's solution? And how did he know that one call was MD5 with modified constants? Yes, there are several dword mov's in a row, but still, how do you guys recognise when it's a certain hash algo?
Ox87k 06. Apr 2008	@andrewl.us: The "Cauchy's CryptoSIG" is a signature file for IDA. With this one you can recognize many hash algos using IDA. Here is the homepage (i think this project is a little bit old now): http://www.cryptosig.prv.pl/ You can recognize the hash algos with PEiD's plugin called "Krypto ANALyzer" (Kanal) or with a program like "Crypto Searcher" by x3chun.
andrewl.us Moderator 06. Apr 2008	Ox87k: I thought KANAL Plugin, Ilfak's FindCrypt, and the like all identified algorithms simply by the constants they used - in this case the constants are wiped out, so are some advanced crypto scanners actually doing code analysis?

LoseSpeed's No Message Alarm You

Download NoMessageBoxAlarm.zip, 6 kb (password: crackmes.de)
Browse contents of NoMessageBoxAlarm.zip

The CrackMe Is Write By Me, It's A MFC Program

When It Is Run, Generate A User ID In The "UserID" EditBox, And It Is Read Only.
When You Input Right Register Code ,You Will Enter The Main Dialog, It Mean You Win :)

If You Input Wrong Register Code, I Will Clear You Input And Count Your Input Times.
And No Message Alarm You, And Wait You Input Again.

When You Cost 3 Times Input Wrong Register Code,The Program Quit. It Mean You Lost This Game !!!

I Meet A Soft Is Doing Like This, So I Write This CrackMe, And I Want To Kown How Crack It,
I Wait Your's Crack Result :)

Good Luck!

Yours LoseSpeed

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: C/C++

Published: 30. Aug, 2005
Downloads: 1927

Rating

Votes: 8
Crackme is quite bad.

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Solutions

Solution by ultrasound, published 01. sep, 2005; download (296 kb), password: crackmes.de or browse.

ultrasound has rated this crackme as boring crap.

Send a message to LostInTheRush »

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Discussion and comments

crackme101 18. Sep, 20:16	As newbie friendly as they get. The only real challenge is finding the exact code that generates the RegisterCode. Once found, it's so simple you don't have to analyze any further. Just start making the keygen :-)

LostInTheRush's LITRs Crackme

Download LITRs_Crackme.zip, 12 kb (password: crackmes.de)
Browse contents of LITRs_Crackme.zip

Crackme by LostInTheRush

Difficulty level: 3

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 02. Mar, 2007
Downloads: 195

Rating

Votes: 4
Crackme is boring crap.

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Solutions

Solution by deurus, published 28. mar, 2012; download (47 kb), password: crackmes.de or browse.

deurus has rated this crackme as boring crap.

Send a message to LuCiFeR »

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Discussion and comments

r0ck 03. Mar 2007	What's the aim of this crackme? To find the password from the "You know what that is?" screen? Because it seems to tell you it whatever you answer....
ARCHANGEL 03. Mar 2007	It can't be so easy! Tell me somebody I'm in the wrong way but as to me it cracks by simple string referense:(
Little_Brother 06. Mar 2007	A level 3?!? wow, this took 30 seconds.. api strcmp... dude.. WEAK
LostInTheRush Author 13. Mar 2007	I think i might have uploaded the wrong app
deurus 28. Mar 2012	Is overrated!!!

LuCiFeR's Crackme1. KeygenMe

Download crackme1.by.lucifer.zip, 7 kb (password: crackmes.de)
Browse contents of crackme1.by.lucifer.zip

fixed one!! First got some little bugs

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 23. Aug, 2004
Downloads: 1069

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

LuCiFeR's Crackme no 3

Download crackme3.zip, 13 kb (password: crackmes.de)
Browse contents of crackme3.zip

packed with tElock 0.96!!
there is no automatic unpacker for it (i didnt find one)! so ether try to unpack yourself or stop here...
Well the crackme isnt that hard (i think).
C++ is cool :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 27. Sep, 2004
Downloads: 1168

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

deroko 21. Sep 2005	Is objective to remov nag screen? if so I've done it...
haggar 21. Sep 2005	I think that keygen is needed too. Tried it last year but couldn't remove nag.
deroko 21. Sep 2005	hi, well problem is that keygen window never shows up =( or I'm missing something...
deroko 21. Sep 2005	ok here it is : it calls nag routine that goes in loop using jmp __back_to_nag when you just skip that proc you end up at ExitProcess so that's it? there is indeed some keygen routine but it's never reached, no references to it, no window, nor anything, now I know why this is still unsolved =)
paradox 25. Sep 2005	site:pediy.com unte.zip ^_^ it is a unpacker for telock 0.98+ which worked.
haggar 25. Sep 2005	paradox, tElock is trivial problem here. Point is that you have to remove nag and find how to keygen it and where is algo for keygen. deroko, yep, I agree with you. Maybe if crackme was written in asm it would be easier but in MingWin C++ it is impossible for me to dig something. Maybe it is something like crippleware.... buah, really don't know.
Tenshi 23. Nov 2005	the window is never created.only buttons and so on so if u kill the jmp from the nag the prog exit..... iam spending my time with something useful now....
EvOlUtIoN 22. Jul 2006	It seems to be impossible to create the window

LuCiFeR's First C++ Crackme

Download LuCiFer_Crackme_v2.zip, 117 kb (password: crackmes.de)
Browse contents of LuCiFer_Crackme_v2.zip

espacially for d@b!
others see readme.txt

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 17. Sep, 2004
Downloads: 9636

Rating

Votes: 4
Crackme is boring crap.

Rate this crackme:

Solutions

Solution by zombie8, published 09. nov, 2004; download (29 kb), password: crackmes.de or browse.

zombie8 has not rated this crackme yet.

Solution by spenser21, published 22. sep, 2004; download (34 kb), password: crackmes.de or browse.

spenser21 has not rated this crackme yet.

Solution by Plasmator, published 22. sep, 2004; download (84 kb), password: crackmes.de or browse.

Plasmator has not rated this crackme yet.

Solution by xyzero, published 22. sep, 2004; download (21 kb), password: crackmes.de or browse.

xyzero has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

F4te 15. Mar 2006	I have a question, why is it such a big executable?
FBI 25. Jan 2007	Great Program to Practise Patching!
hound 26. Jan 2007	I think it was compiled with debug (as oposed to Release), that is why it is quite large....
aout 29. Apr 2007	An okay crackme. Uses FPU instructions!
skapunky 14. Sep 2007	Thank for crackme, I'm newbie and i learn it. I patch it !
VaZoNeZ 13. Feb 2008	I did it with ArtMoney... It was very easy...
GlassFox 17. Feb 2008	I got the serials. but, can't write a keygen,yet. newbie..
torahteen 28. Mar 2008	Well... does a self-keygen count? I know no patching but I couldn't understand the algo entirely... back to examining the code I guess...
r00ster 29. Mar 2008	It was pretty simple to reverse, but it was nice. Thank you for this crackme ;-)
starlight 24. Oct 2008	pretty simple, but I'm a little puzzled by sprintf(...,"%i",..);
Sinok 24. Oct 2008	startlight are you serious? :\ I guess you don't code..
MulleDK13 21. Nov 2008	I got almost finished my keygen.. And then the aweful looking FILD QWORD PTR SS:[ESP] etc. popped up. I guess I need to look those instructions up -.-
totalhack 28. Nov 2008	Was able to fish my serial but thats it. Thanks, this was the first one I could do on my own. Nice and easy.
MulleDK13 29. Nov 2008	Still waiting for a solution that explains the FILD shit >.<
MulleDK13 29. Nov 2008	There is.. sorry.. >.> I missed zombie8's explanation. Though, it would bee cool to actually get all the instructions described there.
SimpleData 04. Feb 2009	Finding the serial for your name and patching is easy for this crackme, but keygening is not that easy. Just check the registers and keep your eye on ECX when you are on the key checking routine.
br0ken 04. Feb 2009	Intel Architecture Software Developer’s Manual Volume 2: Instruction Set Reference That might help ^^. Google for it.
MulleDK13 06. Feb 2009	Thank you. I'll have a look. PS: Why are solutions closed on some crackmes? <.< How could anybody know there's no more solutions?
MapleHaxx 20. Feb 2009	Very easy CrackMe. Thanks
Joel93 18. Apr 2010	dont now how but i managed to code my first keygen, everything was easy, except the fpu-shit.... wrote the keygen in c# (big contrast asm vs c#^^) and its working 100% - thank you
Joel93 18. Apr 2010	however, here is the c# code if someone is interested in: http://pastebin.org/156904
pasharp 25. Sep 2010	it is very easy ! suitable for any newbies like me !
r-Evolution 27. Sep 2010	well it is not easy it is ridiculus.....Phising the serial took me 15 secs...Finding the keygen routine 1 min..... :)
Jasi 13. Dec 2010	@r-volution - well congratulations.. you should use a difficulty >1 then ;) This is my first crackme and I needed the solution to learn the steps I have to make to crack it. I think it's very well done. Thank you!
kiraNL 29. Dec 2010	Not that hard, but a funny one to do anyway.
zaabz 29. Dec 2010	http://www.virustotal.com/file-scan/compact.html?id=023a052e1aa2795f4e5cc6a99c40e5794170cf3e5d4d25fdcb73eafc404cc4a8-1293632296 Maybe theres a reason as to of why it is so big? ZaabZ
Mr. eXoDia 31. Dec 2010	zaabz, i am 100% sure this is not a virus it is compiled with MinGW and if you include <iostream> this file is always like ~450kb Mr. eXoDia // T.P.o.D.T 2010
KOLANICH 10. Apr 2012	Kaspersky says there is Trojan.Win32.Agent.fkyq in cm. http://redirect.kaspersky.com/?target=securelist&rpe=1&function=search&VN=Trojan.Win32.Agent.fkyq
zairon Moderator 10. Apr 2012	don't always trust av...
mopy 04. Sep 2012	ATTENTION! This is a virus! Name: TR/Agent.fkyg !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
$okow 19. Feb 2013	Well done!!! Found the key and patched.
sjheiss 28. Jun 2013	After executing the following line: 0040169E \| FSTP QWORD PTR [EBP-410] The first part of the serial magically appears at 0028Fb38 in ESP... Can someone please explain to me how this happens?
Blizer 20. Jul 2013	Very nice crackme ! ;) Confused me a little in the floating point part... I don't know why the solution section is closed, but here's mine in c++ with code: http://wikisend.com/download/LuCiFer_Crackme_v2.zip/414944/Keygen.rar
batteryshark 24. Jul 2013	A fun little crackme - My python3 solution is here: http://pastebin.com/tEBtg8VU
VRKnight 04. Aug 2013	My first crack, thank you very much! Excited to learn more
cracknoob 09. Nov 2013	change the JE to JMP
vorhon 21. Apr 2014	I changed JE to JNZ, worked fine :P
jilljack 22. Jul 2014	http://pastebin.com/dhU9sSsZ - keygen algo ripped off assembly.
bugmeout 14. Oct 2014	for freshman, it's hard to analyze the algo. I don't like the force-method. it's no meaningful way to study.
seskissinger2 23. Jan 2015	Wrote my first kengen! This is a good one except the FPU part :)
c0ding_fr0g 26. Jan 2015	Coded a 2KB keygen Was fun but had to look up lots of FPU stuff 10+ years old, but thanks to LuCiFeR! Uploaded: http://brianhong.us/public/crackme/LuCiFer_Crackme_v2_KeyGen_c0ding_fr0g.rar (Source code included)
Exorcist1 03. Feb 2015	Thanks for the task! Here it is my Python2 keygen)! http://pastebin.com/JMVg6Cy5
aldeid 05. Dec 2015	My solution posted here: https://www.aldeid.com/wiki/Solution-LuCiFeR-First-CPP-Crackme
nerdyguy64 05. Jul, 01:00	This was a good crack-me to start out with. I think the most confusing part were the FPU instructions but once you look them up they are relatively easy to understand. I will say though, I can break this program by for example entering a name of "longname treelamp123" (don't forget the space in that string). If I remove the space, it works just fine, so I am guessing some type of buffer overflow that relates to that space happens. You are new to C++ so that is understandable for a little mishap there. (Well you were new to it in 2004, you better be pro now ;) ) But anyways, building a keygen is easy once you step through all the math. Thanks again! :) Time to try something harder now.

LuCiFeR's KeyGenMe1

Download crackme1.by.lucifer.zip, 7 kb (password: crackmes.de)
Browse contents of crackme1.by.lucifer.zip

see readme file..
VB6 keygenme.. tricky i think!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 23. Aug, 2004
Downloads: 1112

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Solutions

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Discussion and comments

jhon 12. Jul 2008	Yo ni idea!!! Crearlos es facil, pero desifrarlos es lo dificil!!!
costy 12. Jul 2008	How is it possible to solve this if it uses the Rnd funciton? It generate random numbers :-?
mazuki 18. Nov 2009	very good crackme :) i will be working on the keygen and hopefully get one soon, i like the random generation, but not VB apps :(

LuCiFeR's LuCiFeR iS bAcK

Download luciferisback.zip, 176 kb (password: crackmes.de)
Browse contents of luciferisback.zip

Hi, well im back with a little crackme..
Its like "find my password", well i hope its harder then my other crackmes.. Dunno what lvl so i rated 2..
Rulez:
-no patching
-unpacking (allowed)
-find key

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 19. Aug, 2005
Downloads: 980

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by deroko, published 20. aug, 2005; download (6 kb), password: crackmes.de or browse.

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Solution by Lars_89, published 20. aug, 2005; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

lord__virus 19. Aug 2005	alert!!!! VIRUS FOUND..
haggar 19. Aug 2005	? Which one? Kaspersky shows nothing. I run crackme and nothing happened. Maybe your AV is a bit paranoid?
deroko 19. Aug 2005	yap there is no virus, FSG is treated as virus by some AVs... anyway craked, finishing solution...
haggar 19. Aug 2005	Virus lord scared of false alarms , ts ts ts ;) Deroko, two crackmes in one day !? You don't waste time are you :)
deroko 19. Aug 2005	nah, I was tired from studying today so I played a little bit with crackmes + improved a lot my protector =)
TQN 20. Aug 2005	Hi deroko, can I have a question ? I have find a serial, I think this serial is unity, so we dont need to write a keygen. Is it right ?
deroko 20. Aug 2005	yap, as I figured out, there is no keygen routine =) just key changing and comparing =)
jE! 21. Aug 2005	kaygen can be dine, if between found-key you will insert some garabage ASCII "":
guitarp11 12. Jun 2009	lol? "This program was made with a trial version of Borland Delphi Compiler. The Trial has expired."
Ganoes Paran 13. Jun 2009	XD yea, is that part of the program or what? lol. Patcht hat nag then do then keygen it? lol, but yea thats funny
Mr. eXoDia 16. Oct 2010	No virus PaCKeD (FSG) unpackd = no virus!

luk4sapps's Crack Me #1 by Luk4sapps

Download Crack_Me_#1_by_Luk4sapps.zip, 4 kb (password: crackmes.de)
Browse contents of Crack_Me_#1_by_Luk4sapps.zip

This is my first crackme, it's very easy but I hope it's fun though ;)

GOAL: Create a keygen! (Feel free to decompile)

INFO: The username and serial mustn't be empty!
INFO 2: The code is obfuscated :)

HAVE FUN :D

-Luk4s Apps

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Java

Published: 25. Aug, 2016
Downloads: 99

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Discussion and comments

DimitarSerg 15. Sep, 06:53	DimitarSerg ==gbe37/a3zk0LkTxvJrQmB+ Easy, I'll upload solution today )

LuNaTiC.Net's Crackme#1_LuNaTiC.Net

Download LuNaTiC.Net_Crackme1.zip, 22 kb (password: crackmes.de)
Browse contents of LuNaTiC.Net_Crackme1.zip

Just patch me
No packed
Good luck

[Send me your tutorial please Because i don\'t success to crack it]

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 21. Apr, 2005
Downloads: 1338

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Solutions

Solution by Phenos, published 27. apr, 2005; download (52 kb), password: crackmes.de or browse.

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Solution by SoN, published 27. apr, 2005; download (68 kb), password: crackmes.de or browse.

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lutio's Keygenme1 by Lutio

Download Keygenm1_By_Lutio.zip, 27 kb (password: crackmes.de)
Browse contents of Keygenm1_By_Lutio.zip

This is my first KeygenMe.
There are no anti-debug tricks, or obfuscation.
Rules: No patch/bruteforce allowed.
Enjoy.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 27. Dec, 2013
Downloads: 351

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Discussion and comments

DataBus 01. Jan 2014	I believe this is impossible to keygen for the following reasons. Please correct me if I am wrong. (Not sure where to post this). I may be incorrect, but this is what I have found: 1. User computes a hash of a value and then compares it to the key. This is impossible to keygen without brute forcing. (But brute forcing isn't allowed). This algorithm is dependent on the value discussed in pointer number 2, however; it is always the same (no matter the inputted serial) therefore it is impossible to write a keygen for at this moment (or so I have found) 2. Most importantly, the user computes some values based on the inputted 8 length serial. However, he throws out the unique value and then saves the value that is the same for them all. This value is the same for any serial you input, I believe OP made a mistake here and possibly saved the wrong value MOV ECX,DWORD PTR SS:[EBP-4] SHL ECX, 3 MOV DWORD PTR SS:[EBP-4], ECX the value of EBP-4 is set earlier to 1 Therefore, as we can see, no matter what serial is entered the unique value will always be 0x01000000. And this will always fail the users verification check.
DataBus 01. Jan 2014	Also, I did not state this in my prior post. But the aforementioned code happens while OP enumerates the users serial. Therefore, the value eventually reaches 0x01000000 after the users enumeration of the inputted serial (The entered name seems to have no impact on the output of the key)
acruel 28. Nov 2015	Still solvable, though. C:\Users\acruel\Desktop>c:\Python27\python.exe -c "print 'alice\n' + 'A' * 32 + '\xe4\x12\x34\x01'" \| Keygenme1.exe Name: Serial: Invalid serial! Wrong serial! Congratulations, you've solved it! C:\Users\acruel\Desktop>

luxdav's LuxXx' second keygenme

Download luxxx_keygenme_two.zip, 2 kb (password: crackmes.de)
Browse contents of luxxx_keygenme_two.zip

Hello,

pretty easy keygenme. Written for learning purposes. Compiled with tinycc. Have Fun. Do what you want with it!

You can do these:
BRONZE: Patch it!
SILVER: Fish your key!
GOLD: Write a keygen!

My solution, source code and other keygenmes and solutions are open to everyone at https://github.com/LuxXx/reverse-engineering

Greets LuxXx

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 20. Oct, 2016
Downloads: 435

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Discussion and comments

kyras 05. Nov, 14:02	A bit confused with the first key block. key[] = {0x13, 0x37, 0xDE, 0xAD, 0xC0, 0xDE} when the value bacome negative In the end i've managed to write keygen. Pretty challanging for my first keygenme.
bugnix 06. Nov, 01:09	Yeah, same, that IDIV got me. First KeyGenMe too ^^ Anyway, still wondering if the 0xBEEF was a joke :D
DimitarSerg 07. Nov, 12:23	My first keygen in Visual Studio with asm-inline code: Sources: http://pastebin.com/niA1Wy5Z
mrsleepy 02. Dec, 06:29	I figured out a solution I think.. This is my first try so I uploaded it. I doubt my solution is all that great. Thanks for the fun challenge!

luxor's Keygenme III v1.0

Download KeygenmeIII.zip, 2 kb (password: crackmes.de)
Browse contents of KeygenmeIII.zip

2.5k only keygenme

It's much harder than "II" ;)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 23. Aug, 2007
Downloads: 537

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Solutions

Solution by MR.HAANDI, published 27. aug, 2007; download (572 kb), password: crackmes.de or browse.

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Discussion and comments

luxor Author 23. Aug 2007	The moderator changed this difficulty to be a level 5. I think it's a level 8.
bLaCk-eye Moderator 23. Aug 2007	Solvers will rate the crackme themselfs when they solve it, so i don't see why the difficulty is so relevant to you.
luxor Author 23. Aug 2007	bLaCk-eye,why do you try it by yourself?
bLaCk-eye Moderator 23. Aug 2007	Again, not relevant if i solve it or not ;)
MR.HAANDI 25. Aug 2007	Level 5 seems appropriate, took me 20 minutes to understand what it does and which prime it uses. Maybe I find the time for a tutorial.
luxor Author 26. Aug 2007	The algo is easy to be understanded,but it's hard to be keygenned.

luxor's Keygenme II v1.1

Download KeygenmeII.zip, 2 kb (password: crackmes.de)
Browse contents of KeygenmeII.zip

2.5k only keygenme

It's much harder than "I" ;)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 15. Aug, 2007
Downloads: 489

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luxor's Keygenme I v1.0

Download KeygenmeI.zip, 1 kb (password: crackmes.de)
Browse contents of KeygenmeI.zip

2k only keygenme

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 15. Aug, 2007
Downloads: 721

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by andrewl.us, published 07. sep, 2007; download (119 kb), password: crackmes.de or browse.

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Discussion and comments

kbsa 16. Aug 2007	anybody solved?
born2c0de 20. Aug 2007	Nice Crackme. But it is not written in C/C++ but hand-coded ASM.
luxor Author 21. Aug 2007	born2c0de,you are wrong. Its coded in pure C and Win32 API. VC8 is great for compiling and generating instructions.
br0ken 21. Aug 2007	Wow, that's some very clean code for C! At first, it looks so much like it's coded in ASM.
born2c0de 21. Aug 2007	Wow, that's great. It really does look like handcoded asm.
andrewl.us Moderator 05. Sep 2007	This crackme produces a number based on username (call it A) and a number based on the entered serial (call it B). Half the time, it computes B * B * (B + A) and checks if this matches a hardcoded result. But it is not possible to write an expression in terms of B. Further, for username "asdf", A is computed as 0x797d2334'e2005bc5 and looping through every 64-bit value for B is not even sufficient to find a solution.
Zaphod 05. Sep 2007	andrewl.us: If you are saying that the crackme cannot be solved you are wrong. I found the correct serial for my name.
andrewl.us Moderator 06. Sep 2007	I was wrong and forgot about overflow. The equation instead is: B * B * (B + A) % 64 = hardcoded result And I mistakenly thought all 64-bit numbers had been tried when they had not. Perhaps it is still possible to find a serial (and thus B) for any entered username (from which comes A) but my math knowledge is not enough to solve this equation well.
andrewl.us Moderator 06. Sep 2007	oops: (B * B * (B + A)) % 2^64 = harcoded result

lxmxnx's CrackMe#1 - VM

Download crackme#1.zip, 17 kb (password: crackmes.de)
Browse contents of crackme#1.zip

The crackme.exe checks the passphrase string (It is a random sequence of characters from www.random.com and it is fully stored, i.e. no one way hashes).
If the input is correct it outputs 'correct' otherwise it outputs 'incorrect' :-)

The goal is to recover the passphrase.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 30. Jan, 2009
Downloads: 496

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by Cat2, published 07. mar, 2009; download (4 kb), password: crackmes.de or browse.

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Solution by kao, published 02. mar, 2009; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

main 30. Jan 2009	My ESET NOD32 reports this as trojan. Do you know why? Is this a false positive?
andrewl.us Moderator 30. Jan 2009	Probably, I stepped through a little, very interesting lxmxnx! Did you make it yourself? Can any EXE be transformed into such a mess?
lxmxnx Author 30. Jan 2009	1. I'm sorry to hear that NOD32 marks it as trojan. It is definitely a false positive. There is nothing nefarious in the exe file, just overly complicated strcmp :-)) 2. Yes, I did it all myself, no third party tools involved. Without revealing too much, I have a generator that produces such a mess, however the input to said generator is not another ('clear text') exe.
main 31. Jan 2009	Yeah, really strange. It says something like "probably a variant of Kryptik/W.Trojan". It´s probably just because of an "error" in the heuristics. Anyway, yes, indeed a very interesting crackme!
andrewl.us Moderator 02. Mar 2009	A very cool solution! A similar approach that didn't work: a program was written that held the crackme's execution under the trap flag and just counted the number of instructions executed for different serials. Idea being that strcmp() would exit early on bad characters. Your method is complete!
TFB 07. Mar 2009	Awesome crackme, managed to solve it. Writing tutorial now :)
Cat2 07. Mar 2009	Nice Kao. Just submitted a solution myself, and then checked out yours (I dont look at solution before I solve, or else I'm cheating :P ) Kind of interesting how you did it, I wonder if same thing would work in IRL scenarios sometimes with things like Themida VM. Prolly not :P
andrewl.us Moderator 07. Mar 2009	awaiting TFB's solution - hopefully we'll have collected three difference ways to crack this :)
simonzack Moderator 07. Mar 2009	hei maybe i'll try it too :)
Cat2 07. Mar 2009	TFB's is the same as mine, we kind of colluded on this one, and I ended up doing the writing :)

lxmxnx's CrackMe#2 - keygen

Download crackme#2.zip, 10 kb (password: crackmes.de)
Browse contents of crackme#2.zip

Write a keygen that generates a serial number that can fool this crackme :-) See the readme.txt for details.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 30. Apr, 2009
Downloads: 373

Rating

Votes: 4
Crackme is quite bad.

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Solutions

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Discussion and comments

Holy 30. Apr 2009	When I downloaded it my NOD32 detected it as a virus :S
lxmxnx Author 30. Apr 2009	Yeah :-( It seems that NOD32 does not like it. It has flagged my last crackme as a virus too :-( Anyway, it is a false positive, definitely not a virus.
lxmxnx Author 04. May 2009	It's been couple of days and more then 80 downloads but still no comments ? :-) Is it hard or easy? (Should I change the difficulty level ?) Do you like the crackme or not? If yes then vote ! :-))
lxmxnx Author 20. May 2009	Come on ! :-) Soon it will be one month and ~200 downloads and no takers ?
papanyquiL 20. May 2009	Should be less than a 4 :P
lxmxnx Author 21. May 2009	What do you mean less than a 4 ? :-)) Do you have a solution ?
lxmxnx Author 25. Jul 2009	It's been couple of months. No takers ?
*DNison** 27. Jul 2009	is the file packed because ollydbg isnt showing much inside info
lxmxnx Author 27. Jul 2009	No, it is not packed in any shape or form ;-)

m477hi45's m477hi45s first crackme - ASM

Download crackme1_1.zip, 746 b (password: crackmes.de)
Browse contents of crackme1_1.zip

My first Crackme, written in Assambly.
Please dont patch it!
Run the program with DOS..

write a nice tut ;)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 05. Feb, 2010
Downloads: 1488

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Solutions

Solution by Taco Sundae, published 10. feb, 2010; download (2 kb), password: crackmes.de or browse.

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Solution by mrkz, published 10. feb, 2010; download (749 b), password: crackmes.de or browse.

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Discussion and comments

Coderess 05. Feb 2010	Nice Dos serialme :)
Taco Sundae 06. Feb 2010	Solution submitted. key extracted. patched as well just for fun.
m477hi45 Author 06. Feb 2010	Sorry for this: When you start it you will read "Second Crackme .." Its my first of course, but i updated it ... forgot to check the section .data ...

m477hi45's m477hi45s first serialme

Download m477hi45_serialme.zip, 6 kb (password: crackmes.de)
Browse contents of m477hi45_serialme.zip

This is my second submission and my first serialme!

I wrote it in VBS and compied it with a "VbsToExe" program.

You have to:

-Patch the nag
-Write a keygen
-Write a tutorial ;)

have fun

MODERATOR NOTE: serial is easy, extracting VBScript is not difficult either... but patching the exe (not the extracted VBScript) to remove the nag is quite hard....going to raise the level to 1->3 - bonus points for submitting a tool to extract VBScript from these files :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 08. Feb, 2010
Downloads: 299

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Solutions

Solution by alex_ls, published 10. feb, 2010; download (97 kb), password: crackmes.de or browse.

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Solution by tmtm, published 10. feb, 2010; download (9 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

alex_ls 09. Feb 2010	Hi, m477hi45! Very interesting crackme! Well, I've got one question: I coded a tool for vbsscript extraction, removed the Nag screen and created a keygen but keygen works with correct characters only because i didn't understand how to init the key state, maybe I something missed?!!! Here is a key initialisation from a script: key1=mid(""&alphanum,3,1) key1=mid(""&alphanum,21,1) key1=mid(""&alphanum,28,1) key4="-" key1=mid(""&alphanum,8,1) key1=mid(""&alphanum,12,1) key1=mid(""&alphanum,23,1) And what about key2,key3, e.t.c
m477hi45 Author 09. Feb 2010	a few lines below this.. : if name2="q" or name2="w" or name2="e" or name2="r" or name2="t" or name2="y" or name2="u" then key3=mid(""&alphanum,4,1) end if and so on.. the part that you copied is only the "standard code" if no valid chars (az,0-9) are used for the name..
m477hi45 Author 09. Feb 2010	oke, but you are right, its a bug.. it should be; key1=.. key2=.. and so on..
alex_ls 09. Feb 2010	Thanks for the answer. But i'm interesting how to init KEY2,KEY3,KEY5,KEY6,KEY7 in a case if the name HAS NO VALID CHARS! Or there is some trick?!
alex_ls 09. Feb 2010	Well, I'll fix it in my keygen, thanks
m477hi45 Author 10. Feb 2010	thank you ;) may you send me your tool for vbs extraction ?
alex_ls 10. Feb 2010	check your private messages
LeeviON 11. Feb 2010	could you send the vbs extraction program to me too? rather a private message than link in here but whatever -.-
m477hi45 Author 11. Feb 2010	he added the vbsextractor to his solution ;)

MaBaKeR's crackme2 By MaBaKeR

Download crack_me2.zip, 33 kb (password: crackmes.de)
Browse contents of crack_me2.zip

A very simple crackme in VB

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 31. Jul, 2004
Downloads: 809

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Solution by NaSS, published 31. jul, 2004; download (1 kb), password: crackmes.de or browse.

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MaBi's 2009_01 KeygenMe by MaBi

Download 2009_01_KeygenMe_by_MaBi.zip, 14 kb (password: crackmes.de)
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Try to solve this VB6 KeygenMe and make a tutorial:

- No patching
- No bruteforcing

Have fun!

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 15. Jan, 2009
Downloads: 278

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Discussion and comments

LeeviON 16. Jan 2009	Do i have to make a keygen? Or what..
DigitalAcid 17. Jan 2009	Hence the word "keygenme" in the title :).

macabre's frogger Crackme

Download frogger-crackme.zip, 2 kb (password: crackmes.de)
Browse contents of frogger-crackme.zip

macabre's frogger crackme lvl 2
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Restrictions: NO patching. No Hijacking

Goal: Find User/Key pair to make it print 'Cracked!!'

Notes: No anti-debugging code.

Jump Jump ..oo ribbet oo...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 02. Oct, 2006
Downloads: 537

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Solutions

Solution by stefanie, published 08. dec, 2006; download (2 kb), password: crackmes.de or browse.

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Solution by crp-, published 11. oct, 2006; download (3 kb), password: crackmes.de or browse.

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macabre's Infector-Unpackme

Download inf-unpackme.tgz, 39 kb

Macabre's Infector Crackme v0.1
===============================

This crackme is a self spreading packer. It encrypts it's host
application with a specified password. When you run the target application
you are then prompted for a password. The correct host password will
decrypt and run the embedded application.

There is also an Infector password. When you get that password correct
the light will go from red to green. When that happens your menu will
be enabled to allow you to infect another app. When you choose an
executable the light will go Yellow. This means that your host is
encrypted and in memory. You need to save the new file for the light
to turn back to green.

This is just a level 2 because you don't need to know the password for
the embedded host to make an unpacker (assuming you prompt the user for
the correct password) It of course would be better if your unpacker
didn't prompt for a password but just figured it out and unwrapped it
for you, but we'll see....

Main Goal: Create an Unpacker
sub Goal1: Get the password for the host app
sub Goal2: Get the enable password for the infector
Level: 2
Rules: for sub Goal2 you can not patch.
This is a KDE App:
Qt: 3.3.7
KDE: 3.5.5

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 12. Nov, 2006
Downloads: 407

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Solutions

Solution by whats, published 24. may, 2008; download (5 kb), password: crackmes.de or browse.

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macabre's kde-enableme1

Download kde-enableme1.tgz, 20 kb

Macabre's KDE enableme
======================

Just what it says.... There is a button labeled "Enable Me"...enable it
and press it! Then write a short tutorial on how you did it. This is
just another intro to KDE cracking.

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 12. Nov, 2006
Downloads: 718

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Solutions

Solution by tiriki, published 11. feb, 2011; download (300 kb), password: crackmes.de or browse.

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Discussion and comments

Zodd 08. Apr 2009	./enableme: error while loading shared libraries: libaudio.so.2: cannot open shared object file: No such file or directory UHMMMMMMMMM
graz 12. Aug 2010	You need to install nas-libs. Doing a ldd you can find the missing libs.
Noteworthy 06. Dec 2013	Cracking Done !

macabre's K-genme

Download k-genme.rgz, 17 kb

My first KDE app/crackme. :)
============================

Name: K-genme
Level: 1
Goal: Keygenme
Restrictions: No Patching or selfkeygenning
Notes: No anti-debugging used. Algo is fairly simple

Compiled with:
Qt: 3.3.7
KDE: 3.5.5

Tested on Debian/unstable (Oct '06)

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 12. Nov, 2006
Downloads: 1082

Rating

Votes: 4
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Solutions

Solution by prout, published 20. may, 2007; download (4 kb), password: crackmes.de or browse.

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macabre's ps3crackme1

Download ps3crackme1.zip, 7 kb (password: crackmes.de)
Browse contents of ps3crackme1.zip

This is my first PS3 crackme! This is meant to work on linux on the PS3.

It was written and tested on Ubuntu 7.10 but hopefully will work on others.

The debugging symbols have not been stripped. It utilizes an embeded SPE
processor and requires the libspe2 to run. You should also know it's a
powerpc64 Elf executable. Enjoy!

macabre

Rules:

Don't patch unless it's to make a self keygen.
Serial Fishing is fine.

Good luck

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 25. Apr, 2008
Downloads: 341

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Download rccrackme-macabre.tgz, 3 kb

Discussion and comments

TiGa 25. Apr 2008	64-bit version of Ubuntu is required.

macabre's rcCrackme

Goal: Make a Keygen that can get it to print

[Registered Version]

Rules: Patching is allowed but no selfkeygen

Features:
* Some basic anti-debuging tricks
* Some code obfuscation (but really easy)
* Algo has an intentional bug that gives me an extra
2 bytes...this was a bug but then I liked it :)
* A little Self modifying code

Enjoy my first crackme!

--macabre

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 24. Sep, 2006
Downloads: 408

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Solutions

Solution by stefanie, published 19. dec, 2006; download (5 kb), password: crackmes.de or browse.

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Solution by crp-, published 02. oct, 2006; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

crp- 24. Sep 2006	interesting one. but maybe level 3 is a bit too high?
macabre Author 25. Sep 2006	Yeah, perhaps you are right. The math is super simple but I had several things in it so I made it a 3. I have no problem making it a 2 if that's more appropriate.

maccrack 2k2's TXC KeyGenMeV2

Download KeyGenMeV2.zip, 399 kb (password: crackmes.de)
Browse contents of KeyGenMeV2.zip

Make a functional Keygen for this KeyGenMe...
It's for beginners and advanced reverser, no crypto code used.A little math thats all!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 07. Oct, 2004
Downloads: 994

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Solutions

Solution by EsKiMo, published 01. feb, 2006; download (14 kb), password: crackmes.de or browse.

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madboyx's Crack IT

Download Crack_it.zip, 14 kb (password: crackmes.de)
Browse contents of Crack_it.zip

It is my first crackme
Language - C++
Need password.

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: C/C++

Published: 21. Jan, 2008
Downloads: 413

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Solutions

Solution by Iñaki Viggers, published 26. jan, 2008; download (3 kb), password: crackmes.de or browse.

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Solution by ascii, published 26. jan, 2008; download (50 kb), password: crackmes.de or browse.

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Discussion and comments

br0ken 21. Jan 2008	Umm, this crackme is exactly the same as xylitol's, except for the password. Correct me if i'm wrong. And, thanks for coding! http://crackmes.de/users/xylitol/xylicrackme_no._3/
TiGa 22. Jan 2008	Xylitol's crackme was made with qbasic. This one is made with Borland C++. Pretty much all 16-bit dos programs start the same way.
Computer_Angel 22. Jan 2008	I reallly don't like DOS ~.~
saitob 23. Jan 2008	That's why we got XP and Vista x) OT: A nice crackme indeed.
Martin-i 16. Jan 2013	i´m beginner, I can´t open it in ollydbg.
haggar 16. Jan 2013	OllyDbg is 32bit debugger/disassembler. This crackme is 16bit application. You can use IDA or some other disassemblers. I don't know does any debuggers exists for 16bit apps that runs on Windows Vista, 7 and 8.

MadButcher's $irAragön's Keygenme#1

Download keygenme1.zip, 8 kb (password: crackmes.de)
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my first keygenme

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 22. Apr, 2003
Downloads: 766

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T-rad 17. Jul 2010	simple, but nice. Thanks for the crackme
Wender 18. Jul 2010	Name:Alex serial:H*=
madmaurice Author 18. Jul 2010	@Wender sry you are wrong, but plz keep trying :D
EvOlUtIoN 19. Jul 2010	Very easy... Name: EvOlUtIoN Serial: xD-0D5E-764B
Loukisgr 19. Jul 2010	Nice one! Name:Loukisgr Serial:xD-46A3-CCD3
tuareg 19. Jul 2010	Thanks ... Name: tuareg Serial:xD-3FB8-146C
deurus 19. Jul 2010	What we understand with NO SELFKEYGENNING??? fish the serial with olly is easy for all Respect the rules please
EvOlUtIoN 20. Jul 2010	No selfkeygenning at my side means that no keygen is allowed by directly ripping code from file...
brangelito 20. Jul 2010	deurus: Just because they have a serial doesn't mean they have a submitted solution. Solution should have keygen.
Aurril 22. Jul 2010	I've submitted a keygen written in Ruby. No tutorial though, maybe someone else wants to write one as I am not a gifted tutorial author.
madmaurice Author 27. Jul 2010	@deurus selfkeygenning means you are not allowed to simply copy paste the assembler code or to modify the original executable to print the valid seriel to the console.
brian wang 30. Jul 2010	Dear all, I just find that just change one word je to jnz in the 00401765 address, it will be cracked.
KernelJ 30. Jul 2010	brian: this is the case for a lot of keygenmes/crackmes and even real protection code that patching a single bit will make the executable 'cracked'. However, this knowledge is only really useful for patching, and this is one reason why the NO PATCHING rule exists on many crackmes...
r-Evolution 16. Sep 2010	@Aurill i have written a solution but i am a newbbiew on programing!!!
theD0c 24. Nov 2010	Thanks! Easy! Name: theD0c Serial: xD-4F19-C8DB
kender 27. Apr 2011	Wow that was awesome took me good couple of hours but Im no were near close to make my own keygen yet Thank you!!! kender xD-A468-AD37
boss756 14. Apr 2012	ncie this is good
EdwardBlack 20. Oct 2013	what does the rule: "no patching" means ?
evaboy 21. Oct 2013	@edward black: No patching means you don't alter the program's code i.e je to jne and otherwise or even writing a program that does so. In the latter case, it is called patcher.
IXORI 09. Apr 2014	I've submitted my keygen. It was a nice and fun challenge. Thanks for that. :)
botanyaki 09. Apr 2014	name:botanyaki key:xD-92F3-10EA If you dont want to reset your crackme every time. modify JE to JNE now you can check all the serial first. thank you.

Madoui's Madoui's Keygenme 1

Download Keygen.zip, 287 kb (password: crackmes.de)
Browse contents of Keygen.zip

This Crackme uses the Hard Disk Serial Number to generate the password wich is stored in the table kaygen.dbf

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: Borland Delphi

Published: 24. Oct, 2008
Downloads: 383

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Discussion and comments

main 25. Oct 2008	What does this error mean: "Unu erreur est servenue lors de I'nitialisation de Borland Database Engine (erreur $2108)"? Meant to be?
Madoui Author 25. Oct 2008	You must have BDE installed on your machine
Xspider 26. Oct 2008	This is french! and it mean: An error has occured at time of initialisation of Borland Database Engine (erreur $2108) maybe it's not translated correctly!!
Madoui Author 07. Nov 2008	Install the Borland Database Engine 5.2 to solve the problem : http://ibinstall.defined.net/download/Keygen.zip/BDEInfoSetup.zip
redoC 18. Nov 2013	What we need to do to make it solved? Finding password is easy, but what to do with it after? In TForm1.FormActivate() I see no checking algo. Give us some clues.

MaDX's Noxfire Crackme #1

Download nxfcm1.zip, 168 kb (password: crackmes.de)
Browse contents of nxfcm1.zip

create a keygen or patch+keygen
read rules.txt :)

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 08. Aug, 2006
Downloads: 559

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Solutions

Solution by Lesco, published 03. sep, 2006; download (246 kb), password: crackmes.de or browse.

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Discussion and comments

jE! 30. Aug 2006	yesterday was day_of_unpucko of this crackme; author, give me some info about SN-tape: is it crypto-level? (i don't know crypto)
Lesco 30. Aug 2006	Yep, the keygenme makes use of cryptography. A hint: Finding out which library was used for implementing the algorithm used, was crucial for me to recognize it. I keygenned and unpacked this one some weeks ago and wrote a solution on a german board, but I was too lazy to translate it to english and submit it here, but if I find some time, i'll probably translate it.
jE! 31. Aug 2006	ok; also, what means kg+patch? i see there good-boy jump, so everithing will accepted; thusley, you want kg, which produces anything?
DeepBlue 02. Sep 2006	He probably means inline-keygen. ;)
Lesco 02. Sep 2006	Inline-Keygen is not very useful for this crackme. It would be more effort than an 'own' keygen, since nothing related to the right serial appears during the checking process. I don't know what the author meant by "kg+patch", either.
jE! 02. Sep 2006	Lesco, if you did kgen, then i can write tut on unpacking, you on kgen.. ok? show me your unpacked, i will compare with mine..
Lesco 02. Sep 2006	i already submitted solution about unpacking+keygennig, so just wait till it has been approved (hopefully) and you will have my unpacked version.

mag7's ReverseMe #1

Download revme#1.zip, 50 kb (password: crackmes.de)
Browse contents of revme#1.zip

The main goal of this ReverseMe is to write a working keygen for 1st and 3rd code algos.
In case of 2nd code you can give one particular example. Try to find as short as possbile.
If you can not do it using analytical approach then instead you can code some brutforcer but
only for particular parts of 1st code verifier algo. ReverseMe is neither packed nor modified.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 19. Dec, 2010
Downloads: 385

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by tamaroth, published 29. dec, 2010; download (433 kb), password: crackmes.de or browse.

tamaroth has rated this crackme as quite nice.

Discussion and comments

draww 19. Dec 2010	RSA-1024? is it a part of protection or am i wrong? ;)
mag7 Author 20. Dec 2010	yes RSA-1024 is a part of protection
tamaroth Moderator 20. Dec 2010	It is, and it's doable ;-) just finished, quite awesome crackme!
mag7 Author 02. Jan 2011	Good work tamaroth! Yours solution is more than enough comprehensive ;-)
apuromafo 03. Jan 2011	nice @mag7 & @tamaroth ", GREETZ TO YOU READER!" ;) i was readed and tested good work
mag7 Author 10. Jan 2011	thx apuromafo ;]

Solution by eternal bliss, published 01. may, 2000; download (2 kb), password: crackmes.de or browse.

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magik's Anti Olly 1.0

Download Anti_Olly.zip, 254 kb (password: crackmes.de)
Browse contents of Anti_Olly.zip

A little crackme just for fun.

1) bypass the anti debug / junk
2) bruteforce / keygen
3) write a tut :)

rulez : use only a 'standard' version of OllyDbg (or it's not fun)
no HideDebugger plugin or OllyIce or things like that.

enjoy!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 18. Apr, 2007
Downloads: 1002

Rating

Votes: 8
Crackme is good.

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Solutions

Solution by apuromafo, published 16. feb, 2008; download (2026 kb), password: crackmes.de or browse.

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Discussion and comments

Adjiang 19. Apr 2007	Nice gfx music and pic ! :)
magik Author 19. Apr 2007	Thanks! Music is for registered user only :P Did you crack it already ? :D And I forgot to write, the junk code is from Beatrix :)
EvOlUtIoN 20. Apr 2007	very interesting! I find difficult to remove some anti-olly...for example i cannot remove the memory protection.
magik Author 20. Apr 2007	Memory protecton? I think you missed something :) I hope you having fun with my crackme, there is more than 10 anti-ollydbg :D the first few are very basic, after its getting harder.. I even tried to 'create' my own anti-olly :p
magik Author 22. Apr 2007	I won't have Internet access from tomorrow until... I don't know yet :) so good luck everybody & see u soon!
w00b 26. Apr 2007	if you've cracked it, please write a tut!! community would greatly appreciate it!
apuromafo 16. Jul 2007	rtdsk is difficult by pass and nag exit but not impossible..
KernelJ 19. Jul 2007	I can't hear any music on this...
KernelJ 04. Aug 2007	has anyone done this, and if so plz write a tut! I don't know where or even how to start...
Shism 06. Aug 2007	God damnit I keep getting a messagebox with a big red arrow. I can't figure out wtf is causing it.
Zaphod 18. Aug 2007	magik, I need help with this one. I have eliminated some of the anti-Olly-tricks, but now I'm stuck. As far as I can see Olly is not detected using EnumWindows, but perhaps it is. So - are the calls to EnumWindows part of the anti?
Zaphod 21. Aug 2007	I solved it...sort of. At least I can hear the music and see the snowflakes now. By running the crackme and attaching with Olly it was rather easy to find the serial for my name. But I still can't bypass all the anti-Olly-tricks :(
Shism 21. Aug 2007	I bypassed almost every anti-olly trick but there seems to be an problem with the borland code and olly...
ChupaChu 12. Oct 2007	Little tip.. dont alow eax to grow - it will mean you have been detected.. also keygening itself is simple.. @KernelJ: music will play and snow will fall only if you dont get detected and enter correct key :)
apuromafo 16. Feb 2008	m in my pseudo tutorial~little, must add the antidump, only change 4085A8 to retn and solve antidump~but thats is the idea~all trickes try now that know the pseudo solution~im write in spanish not in english~sorry my write that form
simonzack Moderator 12. Sep 2008	ahh finally solved this, i wasn't skilled enough when i first tried, and placed it in my hard drive, now looking back, it wasn't that hard afterall. Great crackme! :)
apuromafo 01. Jan 2011	this is a great crackme, some years old post this.. was analized with more detail, and checked 9 millon of serial and in more that 1 pc.., i was understanded the algo and do the values corrects..if some one wana a keygen i was have in write text 4 but are in spanish.. 1) bypass the anti debug / junk ->done 2) bruteforce / keygen-> keygen in excel and masm 3) write a tut :) ->http://ricardonarvaja.info/WEB/CURSO%20NUEVO/TEORIAS%20NUMERADAS/1101-1200/1173-antiolly%20parte%201%20de%204%20Apuromafo.7z http://ricardonarvaja.info/WEB/CURSO%20NUEVO/TEORIAS%20NUMERADAS/1101-1200/1174-antiolly%20parte%202%20de%204%20Apuromafo.7z http://ricardonarvaja.info/WEB/CURSO%20NUEVO/TEORIAS%20NUMERADAS/1101-1200/1175-antiolly%20parte%203%20de%204%20Apuromafo.7z http://ricardonarvaja.info/WEB/CURSO%20NUEVO/TEORIAS%20NUMERADAS/1101-1200/1176-antiolly%20parte%204%20de%204%20Apuromafo.7z maybe can be useful if some one wana learn more.. maybe can be updated, but is a skill from remembering.. gretings Apuromafo

magik's magik FoundMe 2.2

Download FoundMe2.zip, 300 kb (password: crackmes.de)
Browse contents of FoundMe2.zip

Do you like CheckBox ?

this is for fun,
there is nothing hard, just some dirty delphi code.

there is several different mini-challenges in this crackme
(serial, keygen, bruteforce, checkbox, color...)

:)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 15. Sep, 2006
Downloads: 486

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Discussion and comments

geeko 15. Sep 2006	I didn't understand what we have to do?!?!
magik Author 15. Sep 2006	this is why it's 'hard' :p where to start? what you have to do? ... you must discover it by yourself :)
geeko 15. Sep 2006	How did u altered the PE header using just delphi code?!!?!
geeko 15. Sep 2006	Tell us at least what's the app: a game, an antivirus, accounting, dictionary, a virus, defragmenter what? Checkbox clicking trainer? I like it as it is, I see nothing to crack on it. Is very good the way it is.
magik Author 15. Sep 2006	>what's the app? I just want the good boy msg. you can do what you want to solve it (crack, patch, reverse, keygen...) there is no rules.
l0calh0st 15. Sep 2006	Why it is packed with WinUpack when the use of packers is prohibited
magik Author 15. Sep 2006	i forgot this :p should i upload a new non-packed version?
badmojo 15. Sep 2006	I think its good its packed so you cant just run Dede on it ;)
Lesco 15. Sep 2006	Well the packing shouldn't be a too big difficulty for a level 5 crackme, since the oep can be found using the peid-generic oep finder-plugin. Nice gfx/sfx by the way.
EvOlUtIoN 15. Sep 2006	we have to unpack first...
zairon Moderator 15. Sep 2006	Hm, yes the file is packed... sorry, we made an error (black-eyeeee :pppp :)). Magik, submit a non packed version please. I won't remove the crackme giving you the possibility to talk about the protections, when we'll receive the non-packed version I'll change the crackme.
zairon Moderator 15. Sep 2006	Magik, really fast! Ok, non packed version uploaded. Use it from now on. Good luck.
EvOlUtIoN 15. Sep 2006	This is unpacked file...but now i don't know how to continue http://rapidshare.de/files/33241816/FoundMe2_unpacked.rar.html
magik Author 15. Sep 2006	thanks EvOlUtIoN but there is a new non-packed version available.
geeko 17. Sep 2006	Aha, so we have to find the good boy msg... let's go
geeko 19. Sep 2006	I don't like if your crack me messes with my registry and I don't know that!!!
geeko 19. Sep 2006	I found it: U are french!
Mr. eXoDia 02. Jan 2011	Hello back :) this is kinna hard
apuromafo 03. Jan 2011	i was changed the color of text, changed the background, and checked some values in regedit, but are this in maybe a way for bruteforce that not was thinked..i was not solve the boxes and the user/serial

main's VBCrackme

Download VBCrackme.zip, 5 kb (password: crackmes.de)
Browse contents of VBCrackme.zip

Find the password which correctly decrypts the file.

The reason I did this in VB is because I wanted to know if it was possible to do: Function pointers.

Good luck!

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 25. Sep, 2008
Downloads: 382

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Solutions

Solution by JoKa, published 03. oct, 2008; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

main Author 25. Sep 2008	NOTE that I have only verified that the goodboy appear using windows xp (currently I´m using SP2). This has to do with the nature of the encrypted file´s content. I have not verified if it appears using SP1.
xylitol 25. Sep 2008	tested in windows vista SP1 french, and sucessfully crashed (lolz) your crkme crash after pushing the button
MACH4 25. Sep 2008	It crashes here too! when clicking the button xp sp3
JoKa 26. Sep 2008	I suppose it must crash if entered password is wrong.
JoKa 26. Sep 2008	I don't suppose I know it
main Author 26. Sep 2008	Yes. The crackme will crash if you enter the wrong password. :)
JoKa 26. Sep 2008	@MACH4,xylitol: try enter "Э" (char 221 or DDh) as password and press button one time. Program must not crash. Press one more time leads to crash again.
main Author 26. Sep 2008	NOTE: I don´t know how much I should say about this crackme. What I _can_ say, is that if the wrong password is entered, the program will probably crash, or it has undefined behavior. This has to do with the nature of the encrypted file´s content (as I said above). Maybe I should say how long the password is... I´ll wait for some time and see what happens. Good luck!
main Author 26. Sep 2008	Maybe you don´t want too much information. But I think this will reduce the amount of work you have to put down in it (for you that not already figured this out): The goodboy will appear as a messagebox.
JoKa 29. Sep 2008	Tested on WinMe. Incorrect password calls hangup, so be carefull.
sunkj201 29. Sep 2008	郁闷啊。。。。。
main Author 30. Sep 2008	TIP: Focus on the encrypted file and combine what you know about the app (encryption and behavior) and what you know about the goodboy.
main Author 03. Oct 2008	JoKa is on the right track guys. 1. Understand the simple encryption. 2. Find the adress of the data buffer. 3. Use what you know about the files content to decrypt it! Actually only step 1 and step 3 is needed to solve this crackme. When you have cracked it you can focus on the data buffer and modify the file (if you want) to work on your windows version!
JoKa 03. Oct 2008	@main: I think it is bad idea to use directly addresses of kernel32.dll exported functions, because addresses are different across various kernel32.dll versions. I shall write solution.
main Author 03. Oct 2008	Yes, I know. I thought about changing that with a find method, but I had already posted the crackme at that time. Sorry! I can write a similar crackme in C or asm with find methods (peb, seh). It would be better of course, and more educational perhaps (although I wrote a comment about it only working on xp sp2). Good work!
JoKa 03. Oct 2008	It depends on kernel32.dll version, not OS version My kernel32.dll is 5.1.2600.2945 (xpsp_sp2_gdr.060704-2349) (Russian)
JoKa 03. Oct 2008	You could use some functions that were imported by your crackme (like rtcMsgBox). You could also use address of MessageBoxA instead of finding it by GetProcAddress (in that case crackme will depend on user32.dll version)
main Author 03. Oct 2008	What I mean by "windows version" is implicit to correct the addresses. Yes, good point, I thought of that too, but I didn´t want to implement it that way because it was ment to work stand alone from the beginning. I actually first wrote the crackme so that the file would have to be executed through a buffer overflow. That´s why it looks like it does. Thanks for your comments.
main Author 04. Oct 2008	Nice solution JoKa! You really have good reversing skills. And again, sorry about me not thinking about changing the shellcode so it works across verisions! The reason is above. Thanks.

main's VBCrackme 2

Download VBCrackme2.by.main.zip, 5 kb (password: crackmes.de)
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VBCrackme 2

This crackme holds the beginning to an interesting concept (at least that´s what I think).

You must unlock the code with a primary password which lets you check the second password.

A hint is included in the readme.

Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 05. Jan, 2009
Downloads: 460

Rating

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Solutions

Solution by shellwolf, published 17. jan, 2009; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

ARCHANGEL 06. Jan 2009	I didn't understand the task. Do I need to find 2 different passwords or I need to patch crackme before putting the password in it?
main Author 06. Jan 2009	You need to find a password that unlocks some code, and when you have done that you can enter the second password (easy to find).
main Author 06. Jan 2009	I will explain later what i mean with the 'concept'. This crackme is not implementing that concept however, but I´m thinking about doing it in my next crackme... And in C that time.
shellwolf 10. Jan 2009	just some password
main Author 10. Jan 2009	Yes, but for the check to succeed you need to unlock the code with the primary password. "just some password" is the secondary password.
mjesun 12. Jan 2009	just a suposition.. (i didn't try it) with a createprocessa api call?
main Author 26. Jan 2009	Here is a video demonstration on how I "solve" it myself, what is wrong? http://rapidshare.com/files/189564152/Demonstration.of.Solution.to.VBCrackme2.by.main.rar.html
shellwolf 26. Jan 2009	This crackme cannot run correctly under None_english language system??because of rtcVarBstrFromAnsi in the crackme...
simonzack Moderator 26. Jan 2009	shellwolf why do you love lvl1 and 2 crackmes? just curious cause I think you're about level9 maybe you want to help newbies out?
main Author 26. Jan 2009	shellwolf: Maybe that´s the problem, what language system do you have? Did you watch my video btw?
shellwolf 26. Jan 2009	main:I have watched ur video.My OS is chinese language. simonzack:thank u.I am a newbies here.

_mAkA_pOuDeL's _mAkA_ Find My Password 2

Download Crackme2.zip, 7 kb (password: crackmes.de)
Browse contents of Crackme2.zip

â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢
_mAkA_'s Find My Password 2
â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢

This is my third crackme in crackmes.de and probably the previous two weren't approved.

Instruction:
Find my password. Only one password will work. You need to find that and write a tutorial.
No patching plz. Not even in between. You can use other debugger. I want you to find the correct password and write the password algorithm in which
I check your entry.

Crackme Hints/Info:
Made in VB so needs Vb runtime file which u generally have. The program is packed with UPX & the
most interesting thing about it is that it terminates if SmartCheck or OllyDbg is running anywhere,
even in the background. This make it some what challengable.

Made by the member of _khAtArA_ group.(_mAkA_) mean Hasis.
Try it and you will enjoy.

Greetz to:
â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢
In the crackme.
â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 28. Jul, 2005
Downloads: 594

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by movzx, published 15. aug, 2005; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

konstAnt 15. Aug 2005	A VB crackme uncracked. That's a shame....
Knight 15. Aug 2005	VB sucks! Thats why it's uncracked.
movzx 15. Aug 2005	well.. not so hard.. btw thanks Zero for approving my solution
_khAttAm_ 16. Aug 2005	Hehe...................... There are many other VB crackmes uncracked and some of them are mine too................
Knight 16. Aug 2005	I think most of uncracked crackmes here are in VB. And this should say something. I tried this one and can say that i'm little disappointed. Those anti-Olly and anti-SmartCheck triks are useless (i haven't inevstigated further but i'm sure it checks window s captions, or maybe there aren't them?). Everybody got Olly and SmartCheck proteckted against such a tricks. And if not p-code i think i've cracked it in couple minutes (i'm not familiar with it, and not going to learn it). Regards
_khAttAm_ 16. Aug 2005	I think there are good pcode decompilers if you wish to find them.................
Knight 16. Aug 2005	I've got some. But anyway p-code is hardly understandable (well atleast not for trained eye), there is no documentation (maybe?). Also it's obsolete thing and learn cracking it is just the waste of time (this applies only to me and those who haven't already learned it).

_mAkA_pOuDeL's _mAkA_ Find My Password 3

Download Crackme3.zip, 83 kb (password: crackmes.de)
Browse contents of Crackme3.zip

â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢
_mAkA_'s Find My Password 3
â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢

This is my third crackme in crackmes.de and probably the previous two weren't approved.

Instruction:
Find my password. Only one password will work. You need to find that and write a tutorial.
No patching plz. Not even in between. You can use other debugger. I want you to find the correct password and write the password algorithm in which
I check your entry.

Crackme Hints/Info:
Made in VB so needs Vb runtime file which u generally have. The program is packed with UPX & the
most interesting thing about it is that it terminates if SmartCheck or OllyDbg is running anywhere,
even in the background. This make it some what challengable.

Made by the member of _khAtArA_ group.(_mAkA_) mean Hasis.
Try it and you will enjoy.

Greetz to:
â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢
In the crackme.
â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢â€¢

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 18. Jul, 2005
Downloads: 630

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Solutions

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Discussion and comments

_mAkA_pOuDeL Author 24. Jul 2005	Hey this crackme is level 4/10 and is still uncracked.
Oorja-HalT 24. Jul 2005	But can you please tell me why it creates all those multiple bat files and deletes/replaces the autoexec.bat file. The crackme have no right to tamper the system files. I think this crackme should be diallowed
_khAttAm_ 24. Jul 2005	Oh _mAkA_, you really uploaded the old version of your crackme. Man, you shud upload new version............ Come on, thenewer version did not have this bug, did it (I was with you when you coded it), common hurry............ And Oorja, Hope you cracked this too. That was supposed to happen when the serial was right, wasn't it _mAkA_??
_mAkA_pOuDeL Author 24. Jul 2005	Yah Oarja you got the serial right now write a tutorial. Or you may have patched the jumps.
_khAttAm_ 25. Jul 2005	Oh _mAkA_, you really submitted the older one didn't you?? Man you are making a mokery of the _khAtArA_ group, man. Please dont repeat such bullsh!t in da future and please upload newer version as soon as possible............
_khAttAm_ 26. Jul 2005	OK, you're out _mAkA_ Bye..........
konstAnt 15. Aug 2005	Ha.... Ok maka I found your passw0rd.
_khAttAm_ 15. Aug 2005	So constant, maybe you'd like to write a solution................ :)

malfunction's crackme#4 - insanity

Download malfunc_crk4.zip, 3 kb (password: crackmes.de)
Browse contents of malfunc_crk4.zip

a little keygenme, partly written in assembler

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 20. Sep, 2004
Downloads: 1192

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Solutions

Solution by kao, published 26. oct, 2004; download (46 kb), password: crackmes.de or browse.

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Discussion and comments

malfunction's Digital Arithmetic

Download malfunc_crk5.zip, 8 kb (password: crackmes.de)
Browse contents of malfunc_crk5.zip

Description inside

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Assembler

Published: 29. Nov, 2008
Downloads: 545

Rating

Votes: 5
Crackme is good.

Rate this crackme:

Solutions

Solution by andrewl.us, published 18. feb, 2009; download (69 kb), password: crackmes.de or browse.

andrewl.us has rated this crackme as awesome.

Discussion and comments

cyclops Moderator 29. Nov 2008	Good crackme! I just love the whole lot of SEH ;)
kao 01. Dec 2008	Hehe, Malfunction is back! :) I missed your crackmes! And now I got a good reason to brush up my keygenning skills..
_HellDashX_ 02. Dec 2008	A very nice crackme. I have it dumped, and a very nice SEH , :)
xpoy 07. Dec 2008	well,i just love ur "call".tell me something,good crackme and finshed all game.but just lazy too translate test to english look here http://bbs.pediy.com/showthread.php?p=546760
mjesun 07. Dec 2008	oh god, I don't know... japanese :D
simonzack Moderator 12. Jan 2009	finally killed all seh and close to solving nice refreshment after so long time not cracking anything
simonzack Moderator 12. Jan 2009	lol i sound a bit stupid i mean nice crackme!
simonzack Moderator 21. Feb 2009	as the key can read/write to itself, this makes the crackme a bit too easy (i'm not sure if this is on-purpose) the keyfile can simply store the ecx value in one bit, save the results of the name hashes, then compare with ecx to see which value to output, so simply: switch(ecx){ case 0: ... case 1: ... ... } though this can be very big, i read andrewl's solution, which contains xor this can be a specific case of the whole keyfile is this intentional?
simonzack Moderator 21. Feb 2009	umm, now i'm not sure if above works (since there can be no jumps in file), but the following definitely should: use constants in round to load everything, 'and'ed with first 8 bytes (so future rounds constants are not loaded), then shift all values left by 8 bytes wipe out first 8 bytes with 0 therefore we have: for each round the hashed value is shifted in
tony 05. Jun 2009	aha! I found an other method, thanks you ,'andrewl.us',your mind is very good ,but it can be simplified .you let me learn more,and have a inspiration.

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manatails007's manatails007(MTZ007)'s KeygenME

Download KeygenME.zip, 6 kb (password: crackmes.de)
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My first KeygenME
made with C and MinGW
Rulez : Dont patch!
Dont make serial!
make Keygen!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 17. Jul, 2008
Downloads: 391

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by obnoxious, published 21. jul, 2008; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

Iñaki Viggers 17. Jul 2008	TiGa rejected arguing that self-keygenning is considered patching. Well, Patching rather means modifying the crackme so that it always jumps to success message. On the other hand Self-keygenning provides a correct serial to the original crackme and is an example of Code Reutilization. So now what? do we have to type by ourselves hundreds/thousands of opcodes just so a solution doesn't be considered "patching"?
PeterPunk 17. Jul 2008	@Iñaki: for keygenning you need to understand the algo, but for self-keygenning you only need to know how patch the file to show the valid password. PD: Sorry for my english
costy 17. Jul 2008	@ Iñaki Viggers PeterPunk and TiGa have reason. Anyway I suggest to explain this in the faq.
Iñaki Viggers 17. Jul 2008	OK, seen that way I get your point, as it is more explicit than just saying "is considered patching".
costy 17. Jul 2008	Yeah. One time I sended a selfgen. It was rejected by TiGa. I didn't understand becoude he just said "is considered like patching" but I have to admit he then gave me a good explaination privately. It's a good moderator.
TiGa 17. Jul 2008	ok, I added a new question to the FAQ: The author of the crackme asked for NO PATCHING in big capital letters, can I submit a patching solution anyway? Crackmes.de is not a warez site, it's a place to learn reverse-engineering. Solving a crackme is not that important, it's what you learn during the solving process that is important.
~misunderstood~ 19. Jul 2008	@ manatails007 I think your KeygenME is ok for the beginning, but maybe you should think about a more original method of CALCULATING your serial next time (and the relation between name and serial)... ;) Anyway, keep on reversing/coding!
Zaphod 19. Jul 2008	~misunderstood~, I don't think it was such a bad idea to hide the main method, which would normally show up in PeID :)
~misunderstood~ 19. Jul 2008	@Zaphod hhmmm well... ok, that´s a good point at least ;). another good one is the way the correct/wrong - messages to be put out, so that searching for textstrings does not help immediately. but there should have been put more creativity into the creation of the serial.

manatails007's MTZ007's 2nd crackme

Download MTZ007.zip, 404 kb (password: crackmes.de)
Browse contents of MTZ007.zip

2nd Crackme
Patch this if you can

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 12. Oct, 2008
Downloads: 430

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Discussion and comments

vsealv 13. Oct 2008	This one is interesting. I was able to crack it and I am working on patching it/key gen. Here is a sample: Name:Tom Serial:d9a4cd2e6d90e71b59ec50a1acf239ff
indomit 14. Oct 2008	fishing is easy for this one, but keygening need some time :)
vsealv 14. Oct 2008	The keygen isn't that hard, the hard part is to patch, which is almost impossible since it is packed. I can patch the binary in memory every time. To create the keygen I will just use inline assembly.
vsealv 15. Oct 2008	I have submitted a patch, which I thought was more challenging from the comment about patching. I completely understand how the keys are generated and I will have a working keygen working tomorrow.
costy 16. Oct 2008	Can I unpack it and them patch the unpacked file?
vsealv 16. Oct 2008	How would you patch a packed binary? I am curious. Please explain, as I don't want to be boring. Generating the key, that is boring. :-)

mankind's SOARP 1

Download soarp1.zip, 40 kb (password: crackmes.de)
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Simulation of A Real Protection (SOARP)

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Dec, 2002
Downloads: 1734

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Solutions

Solution by kRio, published 29. jun, 2005; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

ManSun's ICT Official Trial Crackme - Level 2

Download ICT.Trial-2.zip, 171 kb (password: crackmes.de)
Browse contents of ICT.Trial-2.zip

Find a correct User name and Key or write a keygen
Also we're waiting for your solution
GOOD LUCK!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 03. Aug, 2005
Downloads: 857

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Discussion and comments

simonzack Moderator 02. Feb 2009	this crackme IS awesome for me it took me 3 days to solve it, and I think this type of crackmes is far harder than the VM ones at the same level (4-5). decrypting the whole thing was a challenge If someone needs a solution, maybe I'll write one
andrewl.us Moderator 02. Feb 2009	You solve level4 from almost 4 years ago and need OUR encouragement to write a solution? Of course write it! :)

ManSun's ICT Official Trial Crackme - Level 1

Download ICT.Trial-1.zip, 67 kb (password: crackmes.de)
Browse contents of ICT.Trial-1.zip

Very easy CRYPTO &...My hard no-patching SMC (Self Modyfing Code) for your pleasure ;-)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 05. Nov, 2004
Downloads: 1079

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Solutions

Solution by Knight, published 31. jul, 2005; download (42 kb), password: crackmes.de or browse.

Knight has rated this crackme as quite nice.

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Discussion and comments

ManSun Author 20. May 2005	Somebody TRY it my simple crackme?
ManSun Author 31. Jul 2005	Congratulations Knight!

ManSun's SunnY KeYGeNMe no. #1

Download sunkey1.zip, 10 kb (password: crackmes.de)
Browse contents of sunkey1.zip

This is my first KeygenMe in pure 32-bit asm

Difficulty: 8 - *VERY VERY* hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 06. Aug, 2003
Downloads: 2054

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Solutions

Solution by Amenesia, published 21. aug, 2003; download (8 kb), password: crackmes.de or browse.

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Solution by harlequin, published 11. aug, 2003; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

simonzack Moderator 03. Feb 2009	Definitely not lvl8, didn't take long at all to solve it, everything in it (including anti-debug) is trivial I mean, what's hard about this crackme? I think it's more suited to level2/3
Kalippan 03. Feb 2009	hard in 2003?? maybe...
simonzack Moderator 03. Feb 2009	has the levels really changed that much?

ManSun's SunnY KeYGenMe no. #2

Download sunkey2.zip, 37 kb (password: crackmes.de)
Browse contents of sunkey2.zip

SunnY KeYGenMe no.#2 is my second KeygenMe

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 06. Aug, 2003
Downloads: 1520

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Solutions

Solution by Oorja-HalT, published 01. sep, 2003; download (4 kb), password: crackmes.de or browse.

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maokecheng's Kick My Ass

Download Kick_My_ASS.zip, 4 kb (password: crackmes.de)
Browse contents of Kick_My_ASS.zip

Hi Good Buddies,I am From China,This is my Second CrackMe,It's easy you must create a KeyGen no violence,It need a little brain,So, Good Luck, any Question,you Can E-Mail Me, maokecheng@gmail.com,XD.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 03. Aug, 2008
Downloads: 294

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Discussion and comments

The So;X 13. Aug 2008	hey what a hack your crackme do ?
simonzack Moderator 14. Aug 2008	I saw a 'yes' string somewhere. Does it display it when cracked??? I'm not sure I think I've found the right pass
Xspider 14. Aug 2008	yeah i saw it too maybe it is the g0od boy but couldn't find the rigth password :p anyway when the crackme is running try to see it in taskmanager! you will see that the name is "¹¤³Ì1" what's that mean, the name of the form ?!?! *-)
simonzack Moderator 15. Aug 2008	omg! The string's soooo hard to see goodboy changes the title of the window!!! and such a small font I did get the right pass :p @Xspider: it's in chinese, so maybe it's because you don't have the font
Xspider 16. Aug 2008	yep i don't have the font :S

mars's mars1

Download mars1.zip, 6 kb (password: crackmes.de)
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my first crackme
find the good serial or patch the crackme
if the serial is bad, there is no message box

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 15. Nov, 2009
Downloads: 969

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Solutions

Solution by fenoloji, published 16. nov, 2009; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

mazuki 15. Nov 2009	there are a few serials that work, but here's the one that i found manually username: !BvS password: s/6S it says NO! in the messagebox, but your detail says that there is no messagebox if it's wrong, so i assume i am right, if you don't use crafy username/password combinations, it will give ugly text in the message box though
mars Author 15. Nov 2009	no errors in the crackme... for a good serial the message is YES for mostly bad serial there is no messagebox for a few bad serial the message is NO
simonzack Moderator 15. Nov 2009	it's supposed to display 'yes' i think that's the author's intent it's the only one that'll will not goto the seh and display a valid message anyway I think this crackme is too easy level 2
simonzack Moderator 15. Nov 2009	oh sorry response with author at the same time my fault
BoRoV 15. Nov 2009	in algo many error, not for all names can find serial for me it name: BoRoV serial: db E4h, '\', 12h, 'o', ...
fenoloji 15. Nov 2009	no error in crackme algo i written solution and keygen NAME: fenoloji SERIAL:S.o
strongfeelingskidney 16. Nov 2009	i made a keygen but cannot find a name/serial combination that is all displayable chars, anybody got one? name: strongfeelingskidney serial: 15h 'b' '2' 'o'
mars Author 16. Nov 2009	valid solution for BoRoV and fenoloji thanks for your participation
cosmos 16. Nov 2009	To moderators. Please provide a gap of at least 3 days before enabling the solution to appear. So that others can at least try it.
iaith 15. Dec 2009	I got one too. name:yang serial:O.g am I right? And I try to find a combination that is all displayable chars,just like strongfeelingskidney said.But I didn't find.Does the author mars have the combination?
mars Author 08. Apr 2010	it's ok for strongfe and yang for all name, some chars are not displayable sorry for this inconvenience, but it was my first crackme :)
als pom 09. Apr 2010	When I unzip the folder marz1.zip my avg 8.5 antivirus said that is a trojan horse Adload_r.LC
mars Author 09. Apr 2010	i try with virustotal and AVG is the only one to find a trojan same probleme with mars2

mars's mars2

Download mars2.zip, 6 kb (password: crackmes.de)
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my second crackme
find the correct serial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 24. Nov, 2009
Downloads: 599

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Solutions

Solution by rachel, published 12. jan, 2010; download (1 kb), password: crackmes.de or browse.

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Solution by hound, published 29. nov, 2009; download (3 kb), password: crackmes.de or browse.

hound has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

hound 25. Nov 2009	Solved. Pretty cool crackme. Will definitely write up a tutorial.
mars Author 29. Nov 2009	thanks for your tut hound. i don't remenber anti debugs for this crackme (maybe errors in coding the crackme, sorry...)
hound 30. Nov 2009	Yeah. It turns out that it was actually my computer that was the problem ... I have Windows 7 x64, and OllyDbg is not working correctly >_<. Just looked suspect because a separate thread appeared to be running with DbgBreakPoint. Anyway, good crackme! Nothing wrong at your end at all. I just need to get a better OS =)
rachel 22. Feb 2010	Little update to my solution: without the 'every digit >=2' condition, 000000 and 000001 would be valid, not 111111.
BlackCode 01. Apr 2010	for avg it's a virus :S
mars Author 09. Apr 2010	i try with Kaspersky and the crackme is clean not a lot of place for a virus in my opinion

matalaz's 1st Panda Challenge 2010

Download crackme.zip, 64 kb (password: crackmes.de)
Browse contents of crackme.zip

You need to create a valid key for the number of users you want.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Unspecified/other

Published: 22. Jul, 2010
Downloads: 167

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

BoRoV 22. Jul 2010	author has already provided a solution
apuromafo 28. Jul 2010	@matalaz what are the real objetive? i see this: the autor was provided the source code, but solution are for testing. xplained, but not are used all in the crackme..how solve this? how idenficates the key valid? i was search a little and the valid key are valid in the same directory, but if you use cmd.exe from system32 and play the crackme, this show the bad boy and not work good, if patch, you see the randomize value that have, with the same key, multiples values of registred but not the key correct. only the key is valid with the key in the same directory . this have a little of virtual machine and author was pass the source code of lazarus (delphi value but solution at all, in english wana know ) and pyton module, but not was pm the tutorial of how you solve this.. .. for try a valid key my friend guan was solved in spanish not in 2 hrs, but he wasmade a tut, if not are none solution in 1 year, I will translate her tutorial for understand this machine because in 1 year more, maybe can study and work too. (actually are in a ciber) but in crackmes.de is only the rules is try to solve the unpackme crackme.. o tut+ rules of autor....if are the 1rs, are solved, but this is for any key as want this was not was posted and this was not solved..... if search the link, matalaz link webpage is the autor of 2nd remade of was unpacked in panda lab that have rc4 and rc5 for a tetri app ->..(http://joxeankoret.com/) ..or better is are the author of my nav plugin for ida pyton module, that today was an update ...(updated the idapyton) link of tutorial of guan spanish version for educational proposit : http://ricardonarvaja.info/WEB/CURSO%20NUEVO/TEORIAS%20NUMERADAS/1201-1300/1262-Reto%201%20Panda%202010%20by%20GUAN.rar greeting, Apuromafo
deurus 31. Jul 2010	If you like this, check the challenge of hispasec: http://www.hispasec.com/uad/crackme_html is more easy but educational too
apuromafo 31. Jul 2010	deurus, i too was participate in that hispasec jeje, and the best tut win..and he was done a keygen too.. i will try to talk to guan to try to traduce this to english and send here, greetings Apuromafo CLS

Solution by apuromafo, published 11. feb, 2016; download (771 b), password: crackmes.de or browse.

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Discussion and comments

sevsnine 26. Jan, 14:22	WWVzIVUzZGxaWFJEWVd0bA==
DJ1hAD0 28. Jan, 15:31	Right password unencrypted and immediately catches the eye :) Use at least XOR, dude :) tnx
AmadeusCracker 03. Feb, 12:18	Thank you for the CrackMe as it's dessigned for begginers there's no reason for blaming u ;P Regards
cranixx 05. Feb, 23:18	Extremely easy, but i think that begginers will like it.
binaryquark 16. Feb, 22:52	Lol use at least XOR, thats the first thing that came into my mind "SweetCake" hehehe 8-)
zhxs 17. Feb, 16:24	I'm a beginner and I liked it. :) Couldn't believe at first though.
kunyit 17. Feb, 21:55	thanks, i am a newbie and trying to understand this. this is easy for me to understand
ronnuriel 31. Aug, 21:28	thanks dude that was very easy ..... if u want to know the pass word just decode that in Base64 : U3dlZXRDYWtl Thanks again!
Dudeson 02. Nov, 21:26	I'm beginning to learn, so this was a nice beginning. Thanks!

matrixba's matrixba[keygenme]

Download Keygenme.zip, 51 kb (password: crackmes.de)
Browse contents of Keygenme.zip

No patch,
Name = serial?
Serial?

See you later

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 29. Nov, 2007
Downloads: 256

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Solutions

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Send a message to Matteo »

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Discussion and comments

DigitalAcid 01. Dec 2007	Too many hidden stuff, don't want to waste time finding the right alignment to see it all properly :\|.
ascii 05. Dec 2007	Could you translate: "çikmak istedigizden eminmisiniz ?" "Per" "Uyari" Or that's a translate challenge ? :D
CrAcKeR18 05. Dec 2007	"çikmak istedigizden eminmisiniz ?" translate are you sure want to quit ? "Uyari" translate warning

Matteo's Matteo KeygenMe

Download Matteo_CrackMe.zip, 7 kb (password: crackmes.de)
Browse contents of Matteo_CrackMe.zip

Hi!
I dare you to make an attempt to beat my first crackme. Impossible things happen inside.

The goal is to keygen the program.
Bonus: Try to document as many tricks as only possible.

Information:
- - The program uses a common mechanism to check whether it is registered or not.
- - It has been packed using some obfuscation methods so that it may be required to unpack the program before continuing.
- - Owing to antidebugger protections that have been added, anti-anti techniques might be useful.
- - Patching is not a necessity.
- - The program has successfully run under Windows 8 x64, Windows 7 x64, Windows XP x32. The last one only in Virtual Box environment.

EXTRA: Due to a kernel protection it's impossible to meet PacMan in Windows 8 (and probably any Windows x64).
If you want to meet PacMan (and you do!), run the program under Windows XP, attach a debugger on the fly and then read at the EntryPoint.

PS. Let me know if you can't understand some magic going on behind the scene.

Contact me by E-Mail "matteo.crackme@gmail.com" (GPG public key at hkp://keys.gnupg.net)
Fingerprint: 683E0BA7359F2830DBDE1D96ED59DF71FD861B1E

Good luck!
Matteo

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 24. Feb, 2015
Downloads: 537

Rating

Votes: 4
Crackme is good.

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Solutions

Solution by tamaroth, published 19. may, 2015; download (454 kb), password: crackmes.de or browse.

tamaroth has rated this crackme as quite nice.

Solution by baderj, published 19. may, 2015; download (88 kb), password: crackmes.de or browse.

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Discussion and comments

tamaroth Moderator 25. Mar 2015	Is it intended that you calculated a checksum for 3 overlapping memory areas in code starting at 0x401041? You point there to memory at 0x401DCF and 22h iterations of lodsd are done, which means it ends at the address 0x401E57 which is way further than next check address 0x401CE1 which in turns overlap with next part of memory?
tamaroth Moderator 25. Mar 2015	Don't mind me, I'm an idiot. I retract previous statement.
Matteo Author 26. Mar 2015	seems that you unpacked first part, now you need to unpack second part and then starting to solve it. feel free to ask anything, i will be happy to answer :)
desert2500 27. Mar 2015	This crackme checks a file with the name 'thekey.k'.I have a problem.At first,it comapare its 0x17 bytes with '0xD'.But then it check whether its 0x5th-0x20th identify with '0x0'.I think it is a logic fault.Or maybe I miss someting?
Matteo Author 27. Mar 2015	i think you miss something here it compare 0x15 bytes (push 15h) not 0x17 with 0xD there are 3 compares two with 0xD and the last with 0x0 (tip: 0xD = \r = CR Carriage Return) (tip2: check the returned value of the call ......) that point shouldn't be hard but let me know :)
desert2500 27. Mar 2015	yes,i made a mistake. I will try again.
desert2500 27. Mar 2015	Hi,Matteo,when I try to unpack it,the function 'CloseHandle' can not be fixed correctly by Import fixer.It is the only bad function. As try to correct it when it is loaded in the memory,the crackme works well.Do you know how to solve it?
Matteo Author 28. Mar 2015	I've sent you a private message
desert2500 30. Mar 2015	Ii is such a difficult crackme for me to solve,but luckily i found the correct anwnser in the end.For three days i didn't sleep well.Thanks to Matteo,a very good crackme~
tamaroth Moderator 30. Mar 2015	desert2500: you plan on releasing the solution? I'm basically on the last part now, with my limited time I should be able to release a solution at the end of the week. Full one with the description of anti-debug methods and decryption routines.
Matteo Author 30. Mar 2015	happy to see that you solved, and very happy to see that you liked it :)
desert2500 30. Mar 2015	tamaroth:Also i have no time until weekdays,maybe a tutorial later than you:) (And i am not sure if i can explain it Accurately).Anything would like to discuss please send a message to me.
Matteo Author 30. Mar 2015	desert2500 sent me a working key file and thanks to it i have found that there is a "bug": the program will accept keyfile that is not alphanumeric only. I knew that the operation on the second serial was "wrong" because i was using all characters but i said to myself "who cares, there will be only 0s after and it will make no difference" i was wrong! it makes difference :) should i upload new version or not? i have no idea... my idea was that only alphanumeric chars were allowed but feel free to solve also with his trick :) after all is my fault if it accepts "invalid" keys...
tamaroth Moderator 30. Mar 2015	Just out of curiosity, desert2500 did you brutforce the seeds for srand in the last part? Because that's a lot of combinations ...
Matteo Author 30. Mar 2015	i don't know what he have done but i have brutefurced it. if you optimize it a bit in 7 min you can check all the keyspace (every seed). if i'm not wrong there are 4 valid seeds (and only one other) but 2 of the 4 create a key that is not alphanumeric and "should" be wrong
desert2500 30. Mar 2015	Matteo,I have made a keygen with python.It can produce all legal keyfile format.I have mail it to you.Please check it.
desert2500 30. Mar 2015	tamaroth,yes ,you have to bruteforce the seeds.
Matteo Author 30. Mar 2015	it doesn't ask for name, and your name length is fixed at 4 but it works :)
tamaroth Moderator 01. Apr 2015	keygen also done, write up should be done by the end of the week hopefully.
Matteo Author 07. Apr 2015	IMPORTANT NOTE: WRONG EMAIL IN THE DESCRIPTION my email is GMAIL.COM AND NOT .IT i have read it many times before publish and there are still bugs in the description :)
andrewl.us Moderator 19. May 2015	"bumping" this thread to the top to show baderj and tamaroth's thorough solutions, congrats
tamaroth Moderator 19. May 2015	That "week" took over a month :D
Matteo Author 20. May 2015	fantastic solutions! congratulations to both!! pacman trick still missing... will someone document it? although it doesn't work on newer windows it can be understood and documented. check the last call, the one that show MessageBox, is full of tricks :) i'm still amazed by your solutions! now i need to make something new :) see you soon...

mausy131's Cypher Code

Download Crackme_by_mausy131.zip, 262 kb (password: crackmes.de)
Browse contents of Crackme_by_mausy131.zip

Hello,

This is my first crackme for crackmes.de written in C++
I hope you like it.

Good luck and read the readme file

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 25. Feb, 2013
Downloads: 1173

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Solutions

Solution by iSSoGoo, published 05. mar, 2013; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

mausy131 Author 05. Mar 2013	Very good solution iSSoGoo :)
iSSoGoo 05. Mar 2013	Thanks, it was fun ;)
mopy 16. Apr 2013	!!! WARNING !!! THIS IS A VIRUS! https://www.virustotal.com/en/file/9dbc1de700a488e791f2a77e019ecbc02d9e8e41b9beb4f4655382aaf5910d15/analysis/1366120997/
iSSoGoo 16. Apr 2013	Very interesting, I just testet it myself and compiled some programs (Simple 'Hello World') under different systems (Win7 and XP) and get Virus Detections, too! I think there is a problem with the GNU GCC Compiler. Look at that: https://www.virustotal.com/en/file/9dbc1de700a488e791f2a77e019ecbc02d9e8e41b9beb4f4655382aaf5910d15/analysis/1366120997/ I get 6 detections, for a simple Hello World program :P
mausy131 Author 17. Apr 2013	I know virustotal detected it as a "virus" or "malware". If you don't trust me then don't download this crackme. Trust me, it is not malware! The most of the AV's recognize it a "Gen" and since it is a keygenme they are right, but this is 100% a false positive!
tong 12. May 2013	if crakeme shows a string with 'a' or 'A'，there is no key.The crakeme Algorithm should be ">= 'n'".
iSSoGoo 12. May 2013	@tong: Very Good! I didn't see that, but you're absolutely right!
mausy131 Author 17. May 2013	I used if ((tolower(source[i]) - 'a') < 14) So it should be < 13 I guess
mausy131 Author 27. May 2013	I'm waiting for more solutions (:
elicn 11. Feb 2014	Well, this is quite simple except from that 'bug' in the ROT13 implementation. Since ROT13 here is not reversible, i.e. ROT13(ROT13('n')) != 'n' and ROT13(ROT13('N')) != 'N', there is no way to generate a valid key for a username that contains either 'a' or 'A'. That is a classic 'off-by-one' bug.
elicn 11. Feb 2014	Sorry, I meant ROT13(ROT13('a')) and ROT13(ROT13('A')) up there.
mausy131 Author 30. May 2014	That's right, sorry for that bug :(

mausy131's RegisterMe

Download CrackMe_#2.zip, 260 kb (password: crackmes.de)
Browse contents of CrackMe_#2.zip

Hello,

This is my second crackme for crackmes.de written in C++
I hope you like it.

Questions or feedback?
Please send me a PM.

Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 26. May, 2013
Downloads: 496

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Solutions

Solution by iSSoGoo, published 01. jun, 2013; download (32 kb), password: crackmes.de or browse.

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Discussion and comments

buganxin 29. May 2013	always show restart the program!!
mausy131 Author 29. May 2013	You are a reverser, try to fix it...
mausy131 Author 25. Jun 2013	I have published a new crackme based on this one, it is a little more difficult but that makes it interesting
c0R3 30. Jul 2013	quite nice, thanks for it :)
mausy131 Author 31. Jul 2013	You're welcome! You should try the other one too.

mausy131's RegisterMe #2

Download CrackMe_#3.zip, 276 kb (password: crackmes.de)
Browse contents of CrackMe_#3.zip

Hello,

This is my third crackme for crackmes.de written in C++
I promised that I would release an update so here it is.
There are some things added but there are no major changes made.

I hope you like it.

Questions or feedback?
Please send me a PM.

Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: C/C++

Published: 25. Jun, 2013
Downloads: 297

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Solutions

Solution by iSSoGoo, published 06. jul, 2013; download (71 kb), password: crackmes.de or browse.

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Send a message to Maxwellkill »

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Discussion and comments

Coccinell 22. Jun 2013	Not working for me, when i run the program => crash...
B@zz! 22. Jun 2013	You have to fix it. I'm done created a file and now im writing a solution :)
mausy131 Author 25. Jun 2013	I have released an update. There was a HUGE bug in the registration proces that should be fixed right now. seVeb if you need some help send me a pm please
qiqi 26. Jun 2013	IsDebuggerPresent
B@zz! 29. Jun 2013	Dont use my Solution it's not correct it was for the bugged version.
kevkid 06. Jul 2013	I get an Error: Please restart the Program
mausy131 Author 06. Jul 2013	Mmm strange... Think harder, dig deeper.
mausy131 Author 07. Jul 2013	Very good solution by iSSoGoo!

Maxwellkill's Crackmaxme 2

Download CRackMaxme2.zip, 410 kb (password: crackmes.de)
Browse contents of CRackMaxme2.zip

Hi. This is my second crackme.
Patch file crackmaxme2.exe or find algritm key generation and write keygen.
Patching rules:
1. Remove the dependence of the stub.exe
2. Remove anti-patch protection

Good luck.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 21. Mar, 2012
Downloads: 1086

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Solutions

Solution by bike, published 15. apr, 2012; download (215 kb), password: crackmes.de or browse.

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Discussion and comments

redoC 22. Mar 2012	patching is easy, change flags of "CODE" section to read/write/execute and patch: 00454D97 MOV WORD PTR DS:[454E6A],0x9090 00454DA0 JMP SHORT 00454DA7

MaxXor's CrackMe #1

Download CRACKME.zip, 180 kb (password: crackmes.de)
Browse contents of CRACKME.zip

Create a KeyGen :)
Have Fun! :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 15. Feb, 2011
Downloads: 758

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by xylitol, published 21. feb, 2011; download (1012 kb), password: crackmes.de or browse.

xylitol has rated this crackme as boring crap.

Solution by Mayhem, published 21. feb, 2011; download (9 kb), password: crackmes.de or browse.

Mayhem has rated this crackme as boring.

The submission of solutions is closed.

Discussion and comments

ideku_nih 12. Feb 2011	may be you should pack MSVCP100.dll too :D
idid231 12. Feb 2011	Yes, i have some problem, need this file to run.
MaxXor Author 13. Feb 2011	File (MSVCP100.dll) packed. :)
cyclops Moderator 16. Feb 2011	Please stop posting serials. Why don't you just write a proper tutorial and submit!
Mayhem 16. Feb 2011	Submitted my solution.
Zephy 16. Feb 2011	cyclops: When is solution create a keygen and solver can find only serial, then post serial it doesn't matter. Because serial number in tutorial will not be approwed :-( Bad is only when is in discussion post full keygen algo. This stop work and interest other solvers. Or not?
Dooms_day 17. Feb 2011	I can't find the code but I made it self-keygen, any tips once I find where it pushes the strings and there are the conditional jumps to RIGHT SERIAL and WRONG SERIAL?
idid231 18. Feb 2011	i can't run it, peid say dll file is "Not a vaild PE" I don't understand so waiting mayhem's solution.
ideku_nih 20. Feb 2011	The application or DLL MSVCP100.dll is not a valid Windows image. same as mine :\| can't run program.
cyclops Moderator 21. Feb 2011	He has provided 64bit version. Just use 32bit dll and you guys will be fine.
munshi 08. Feb 2013	how can i get serial?
loizos 31. Mar 2013	Hello i wanted to ask if i just fill the binary with 'Nops' and just skip name and serial will work?
loizos 31. Mar 2013	Well i actually found another way to find the serial key and the name first of all i filled bad guy's binary code with 'Nops' then i wrote a random name and serial after that my ollydbg run to adress '013e1d9e' i searched for all referenced text strings and found the correct name and serial.Nice crack bro :)
loizos 31. Mar 2013	Or just change the JNE TO JNP see guys there are many solutions :)
loizos 31. Mar 2013	i mean JNE to JMP

MaxXor's KeygenMe V4

Download KeygenMe_V4.zip, 91 kb (password: crackmes.de)
Browse contents of KeygenMe_V4.zip

Information:
- not packed/crypted
- includes a little anti debug trick

Rules: NO PATCHING

What to do?
Create a fully working Keygen. :)

Good luck to everyone!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 04. Feb, 2013
Downloads: 322

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by bearchik, published 14. feb, 2013; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

idid231 05. Feb 2013	what's your anti debug here? I no see anything @@
bearchik 06. Feb 2013	Solved :) _ _ _ _ _ _ _ (_) (_)(_)(_)(_)(_) _ (_) (_) (_) (_) (_)(_)_ (_) (_) _ (_) (_) (_) (_)_ (_) (_) _(_)_ (_) (_) (_) (_)_ (_) (_) (_) (_) (_) (_) (_) (_)(_) (_)_(_) (_)_(_) _ (_) _ (_) (_) (_) (_) (_)(_)(_)(_) (_) KeyGen and solution in progress.
MaxXor Author 06. Feb 2013	@idid231: take a closer look. @bearchik: Good job, waiting for the keygen. ;)
munshi 08. Feb 2013	pls help me the serial
idid231 10. Feb 2013	I can freely run my olly :) just why i asked.
MaxXor Author 10. Feb 2013	@idid231: Maybe you have a little Anti-AntiDebug plugin. ;)

MaxXor's KeygenMe V5

Download KeygenMe_V5.zip, 74 kb (password: crackmes.de)
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Information:
- platform: Windows
- written in C++
- many anti debug tricks

Rules:
- Generate a valid keyfile
- Patches won't be accepted

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 28. Apr, 2013
Downloads: 285

Rating

Votes: 3
Crackme is boring.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

3ton 02. May 2013	Why is it only works under the debugger (windows xp sp1) 3Ton DEJL-EJFU-FGIO-EJFS
tomkol 02. May 2013	Probably because of mentioned anti debug tricks. If debugger detected then check is altered.
eazar001 21. Aug 2013	@tomkol, 3ton means that the program runs fine with the debugger (after fixing), but the program crashes when running it OUTSIDE of the debugger.
tomkol 22. Aug 2013	If before patching crackme works fine than he did something wrong. Or some anti debug trick crashes it with given name/serial combo outside debugger.
eazar001 22. Aug 2013	I think the second case is more likely, it crashes for me on Windows 7 Virtualbox (without patching, vanilla), but oddly enough, when I run it on Wine using Linux, there are no problems.... strange, it might be a problem with DLLs then...
ragdog 22. Nov 2013	Solved is very easy

MaxXor's KeygenMe V6

Download KeygenMe_V6.zip, 3 kb (password: crackmes.de)
Browse contents of KeygenMe_V6.zip

Information:
============
- platform: Windows
- written in C

Rules:
======
- generate a working keygen
- patches won't be accepted

Good luck and happy reversing!
- MaxXor

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 13. Dec, 2013
Downloads: 450

Rating

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Solutions

Solution by aldeid, published 29. feb, 2016; download (465 kb), password: crackmes.de or browse.

aldeid has rated this crackme as quite nice.

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Discussion and comments

ragdog 15. Dec 2013	Hi Max 1234 43478-CBA3-363G-4CCS My keygen source have you ;-)
MaxXor Author 16. Dec 2013	Yup. Thanks! ;)
maximcff 16. Dec 2013	raqdog overtooked me ;) nice crackme, MaxXor, thanks)
XpoZed 28. Dec 2013	Submitted my solution. However in case the moderator decide to not publish it, you can check it out on my website.
MaxXor Author 29. Dec 2013	@XpoZed, I've read it. Thanks! :)
aldeid 18. Feb, 19:21	Solution submitted. Very nice crakme. I loved the combination of several asembly instructions as replacement of strcmp :)

MaxXor's KeygenMe V7

Download KeygenMe.V7.RTN.zip, 6 kb (password: crackmes.de)
Browse contents of KeygenMe.V7.RTN.zip

Information:
============
- platform: Windows
- language: C
- protection: find it out
- misc: Antivirus/Sandbox may not like it

Goals:
======
GOLD: * create a working keygen
* remove the nag screen

SILVER: * get a working username/serial combination
* remove the nag screen

BRONZE: * make it accept every username/serial combination
* remove the nag screen

WOOD: * remove the nag screen || make it accept every username/serial combination

Good luck and happy reversing!
MaxX0r

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 09. Sep, 2014
Downloads: 501

Rating

Waiting for at least 3 votes
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Solutions

Solution by baderj, published 19. sep, 2014; download (225 kb), password: crackmes.de or browse.

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Discussion and comments

KyleSoska 13. Sep 2014	Finished, Writing Keygen
baderj 16. Sep 2014	achieved gold : user: sheldon md5(serial): 0426837c96160c9b3e6522a7b0d0232a user: leonard md5(serial): 03cfa59b633dce87cd5cae759a379f40 I'll submit a short tutorial for Wood and Gold tomorrow. There are a few nasty traps for beginners.
KyleSoska 16. Sep 2014	Oops, re-uploaded solution with the tutorial as well, sorry
KyleSoska 18. Sep 2014	Had my correct solution rejected twice now, feeling a little annoyed. If you would like to view it, here is a link to a dropbox folder of all the parts to my solution, and a link to a zipped version of these. Dropbox folder of all the parts to the solution including .pdf tutorial and main.c which compiles to the keygen and some example serials: https://www.dropbox.com/sh/2yu64rszuhuacgw/AAC7Z-AsPA1JhDpOX25Xkql0a?dl=0 .zip archive, chrome flagged this as malicious for me: https://www.dropbox.com/s/d6pbqdcu9vn3mbo/KeygenMe7_Solution_KyleSoska_W_Tutorial.zip?dl=0
andrewl.us Moderator 19. Sep 2014	KyleSoska: Your solution was rejected only on the basis that we cannot view the zip contents. The content of your solution is probably fine, so please resubmit! Neither our online zip viewer or the archive manager in Ubuntu can make sense of it. Switch from l33tzip to something more standard.
hasherezade 10. Nov 2014	awesome crackme, thanks! --- hasherezade KJ10Q41-GK86F3-0DEDCY-A9Y876-435

Mayhem's C++ CrackMe #1

Download C++_CrackMe1.zip, 70 kb (password: crackmes.de)
Browse contents of C++_CrackMe1.zip

This is my first crackme in c++ so don't expect too much.
Should be relatively simple as it uses basic methods to generate serials.

Rules:
1. No patching.
2. Make a keygen.
3. Have fun!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 20. Nov, 2010
Downloads: 1723

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by draww, published 03. dec, 2010; download (94 kb), password: crackmes.de or browse.

draww has rated this crackme as boring.

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Discussion and comments

-Alex- 20. Nov 2010	Microsoft Visual C++ 2010 Redistributable Package is needed to run the keygenme or u get "dll missing" error.
draww 21. Nov 2010	yup, submitted my solution.. thanks for the CM.
neo85 23. Nov 2010	Oh the MFC icon should be removed :D
Mayhem Author 03. Dec 2010	Perfect tutorial draww & thanks for taking the time to crack it. I'll make some harder crackmes towards new year as I'm kinda busy atm.
alcohol1231 04. Dec 2010	F-U-U-U-U-U-U-U-U-U
draww 05. Dec 2010	thanks Mayhem, waiting for other CMs :D
KartoshkaIKapusta 02. Jul 2014	IDK but I just patched it
KartoshkaIKapusta 02. Jul 2014	I'm kidding haha
KartoshkaIKapusta 02. Jul 2014	That would make it too easy

Mayhem's C++ CrackMe #2

Download C++_CrackMe_#2.zip, 111 kb (password: crackmes.de)
Browse contents of C++_CrackMe_#2.zip

This crackme involves a bit more math than my previous crackmes. That, and a few other factors, make it (hopefully) more difficult.

Rules:
1. Write a keygen. Serials are extremely easy to bruteforce and for this reason a bruteforcer is not a valid solution.
2. No patching.
3. Have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 24. Feb, 2011
Downloads: 589

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Caelint, published 23. feb, 2012; download (144 kb), password: crackmes.de or browse.

Caelint has rated this crackme as quite nice.

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Discussion and comments

idid231 25. Feb 2011	I can't run it, missing file mfc100u.dll, please upload it :)
Mayhem Author 25. Feb 2011	The Visual C++ 2010 Redistributable Package is required to run the crackme. You can get it from the following address: (x86) http://www.microsoft.com/download/C++_CrackMe_#2.zips/en/details.aspx?FamilyID=a7b7a05e-6de6-4d3a-a423-37bf0912db84 (x64) http://www.microsoft.com/download/C++_CrackMe_#2.zips/en/details.aspx?FamilyID=BD512D9E-43C8-4655-81BF-9350143D5867
Caelint 17. Feb 2012	Solved and created keygen, I will submit my solution as soon as I'm done with it. Some keys until then: Caelint PIIA Mayhem ULH8 Crackme dGVA
Mayhem Author 24. Feb 2012	Nice job Caelint!

Mayhem's Mayhem's CrackMe #3

Download CrackMe3.zip, 5 kb (password: crackmes.de)
Browse contents of CrackMe3.zip

Should be a very easy crackme.
It uses some basic protection, and a basic serial generation mechanism.
Disassemble and read the source if you wish. :/

Have fun

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 23. Aug, 2010
Downloads: 941

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Coderess, published 10. sep, 2010; download (4 kb), password: crackmes.de or browse.

Coderess has rated this crackme as quite nice.

Solution by aRota, published 10. sep, 2010; download (216 kb), password: crackmes.de or browse.

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Solution by daft, published 10. sep, 2010; download (81 kb), password: crackmes.de or browse.

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Solution by Ruev, published 10. sep, 2010; download (5 kb), password: crackmes.de or browse.

Ruev has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

Coderess 05. Sep 2010	Cool crackme, I'm newbie in .NET but I wrote keygen :)
aRota 09. Sep 2010	keygen and solution/tutorial uploaded .NET-files are to easy, because you can use the complete code.
Mayhem Author 09. Sep 2010	Yeah, that's the problem, I'm only familiar with C# and that means I'm bound to .NET :/ I'm glad you guys had fun cracking it though :D
mr_blue 12. Sep 2010	anyone know why i can't find "Sorry, bla bla bla" message in my debugger ?
Coderess 12. Sep 2010	What is the your debugger?
CoreyTrevor 30. Aug 2012	I've cracked a couple old .NET 2.0 shareware control libraries years ago. Trying some modern stuff, but I'm coming up short. Decided to start from the bottom! If you want to register as me: CoreyTrevor/114162637492 :)
darkunited 01. Sep 2012	@mr.blue: This is a .NET file, meaning you just cannot use strings. Just try one of the many solutions above :)
darkunited 01. Sep 2012	@Coderess: You do NOT use debuggers here (when dealing with .NET) You, instead, use .NET Reflector

Mayhem's Web CrackMe #1

Download WebCM1.zip, 5 kb (password: crackmes.de)
Browse contents of WebCM1.zip

A slightly different approach I decided to try for a crackme idea, I know its not a viable solution in a real environment however I thought it might be fun to solve. Like all of my crackmes the actual algo is very simple (I'll make a difficult crackme one day I promise) however it doesn't matter too much in this case.

Rules:
1. There are no rules, just get a goodboy, any way is acceptable.

Have fun!

Oh, and happy new year to everyone at crackmes.de

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 03. Jan, 2011
Downloads: 1040

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by snickler, published 21. mar, 2011; download (3 kb), password: crackmes.de or browse.

snickler has rated this crackme as nothing special.

Solution by jiab, published 14. jan, 2011; download (1 kb), password: crackmes.de or browse.

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Solution by rbs90, published 14. jan, 2011; download (5 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

rbs90 03. Jan 2011	Was really very easy... I solved it in 1 min;) (Hope it is completely correct)
TweetyMR 07. Jan 2011	Hmmm I think I got the URL but after that I stuck... Can't display site in Browser and else I don't know what to do with it :/ Could anybody please upload the solution? Thanks :) (Btw: It's my first CrackMe and it's a funny challenge for me :D)
draww 08. Jan 2011	@TweetyMR: 1. patching the assembly is very easy (use reflexil or patch by hand) and i still don't want to publish one byte patch as a solution, there is nothing to learn with it (currently i am not working on this). 2. to display the site (you see a blank page without parameters) you have to change your UserAgent info to a custom thing, that's in the crackme. just look carefully ;) UserAgent defines your browser name, etc.
P15RR5 09. Jan 2011	Hi, I'm new here. I'm French and I want to know how do you crack that. Did you use software ?
rbs90 09. Jan 2011	You can use Reflector together with Reflexil. Just google it;)
nocr 09. Jan 2011	need to solve if Status :off-line, because can't write anything to the fields.
nocr 11. Jan 2011	@TweetyMR "Can't display site in Browser and else I don't know what to do with it :" block the net for the app and the status: offline all field disebled to write /sorry my english/
draww 13. Jan 2011	@nocr: it's a web crackme as the name says. the key check is done by server side. and after checking you get true or false as response. if you block reaching its server, you get offline limitations, that's normal..
nocr 14. Jan 2011	oke, True or false :)
Mayhem Author 14. Jan 2011	Well done to the guys that solved & thanks for taking the time to crack it. To those in the comments who were unsure, I hope the solutions allow you to learn something and I hope you had fun trying. As always, more crackmes coming soon.
bLaZeD 17. Jan 2011	Cracked. http://img651.imageshack.us/i/46393506.png/
Crack.IT 19. Jan 2011	This was my first crackme - cracked it in one minute without reflecting debugging or disassembling :p I think i'm addicted. http://i.imgur.com/9pt04.png
snickler 20. Mar 2011	Cracked via WPE Pro, intercepted packet and changed from false to true, and then from 5 characters of length to 4 characters of length ;)
Mayhem Author 21. Mar 2011	Nice solution, snickler. Thanks for taking the time to crack it.
Nicohogtag 22. Mar 2011	Care to try mine guys: http://www.mediafire.com/?v6l5rb6j1ki39ji
idid231 14. Apr 2011	Finally, i know how to patch in .net :D Thank you

mayhemious's mayhemious_Crack_me

Download mayhemious_Crack_me.zip, 89 kb (password: crackmes.de)
Browse contents of mayhemious_Crack_me.zip

keygen me if you can

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 20. Apr, 2008
Downloads: 724

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by kbpower, published 03. oct, 2008; download (3 kb), password: crackmes.de or browse.

kbpower has rated this crackme as nothing special.

Solution by xylitol, published 25. apr, 2008; download (418 kb), password: crackmes.de or browse.

xylitol has rated this crackme as nothing special.

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Discussion and comments

mayhemious Author 26. Apr 2008	@xylitol this is great work !!! thx 4 all
nkcss 21. Oct 2008	I liked it :) Was a bit hard with the language barrier, but I've been able to write a Keygen (created it in VB.NET). I've seen tutorials in the accepted solutions, is that required for the crackme to get accepted? I've included the full source of the solution, so not sure if that's enough.
indomit 22. Oct 2008	nkcss, read the FAQ, please. http://www.crackmes.de/faq/ And, yes, tutorials is required.

Mazrock's crackmypadre

Download crackmypadre.zip, 3 kb (password: crackmes.de)
Browse contents of crackmypadre.zip

Hello admin, here is a crackme that I made.

As you can see it's a crackme for unix/linux OS. (more precisely, it's a keyfileme)

The principal aim is to find the unique password that this crackme contains.

But the routine is dynamic, to uncover the solution, the routine relies on PIDs of father/child coming from a fork().

This program tries to open and read a file named "livret_famille" (yeah sorry i'm French and this challenge was supposed to be for a french contest).
In this file, the program tries to get 2 numbers, the 2 PIDs of the father and child.

That's make it dynamic, everytime the PIDs change.

Then, If there is a file named "livret_famille" containing the PIDs of the 2 process => WIN, if not => FAIL.

But to make it harder, there is a protection that I made. It's an anti-debugging technique based on the presence or not of certain programs in the process list (like gdb, ddd etc...): for instance, if there is a process with the name "gdb crackmypadre" in the process list, my program will stop and print a message saying that the user shouldn't open a debugger ;)

If i remember, the final password is something like "0mg0d", anyway there is only 1 password, so if you see "** Le mot de passe pour valider est ..." ("the password to valid the solution is...", you are done.

If you are a little bit interested in this challenge I can provide you the source code.

Bye

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 24. Jan, 2011
Downloads: 443

Rating

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Solutions

Solution by s3Rious, published 30. jul, 2013; download (6 kb), password: crackmes.de or browse.

s3Rious has rated this crackme as nothing special.

Solution by Yoha, published 14. feb, 2013; download (7 kb), password: crackmes.de or browse.

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Solution by stupid, published 14. feb, 2013; download (970 b), password: crackmes.de or browse.

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Solution by Matir, published 11. feb, 2011; download (518 b), password: crackmes.de or browse.

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Solution by tiriki, published 11. feb, 2011; download (610 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

lagalopex 07. Feb 2011	Ehm, I think here is something wrong?! Or why is the cm explained? ;)
Mazrock Author 13. Feb 2011	lagalopex: I don't know, I think the admin/moderator made a little mistake by posting the solution :( And I don't have any chance to edit this.

mcmof Author 10. Dec 2006	its solved by ZaiRoN http://woodmann.com/forum/showthread.php?t=9700
zairon Moderator 28. Dec 2006	There's a new version of the crackme online; this time the Virtual Machine code is visible (no encryption is used) but there are some nasty crc checks. Take a look here: http://207.218.156.34/forum/showthread.php?t=9769

mcourteaux's CrackMe1 by MC

Download crackme1.zip, 165 kb (password: crackmes.de)
Browse contents of crackme1.zip

This is my first CrackMe. I made it in C++
Of course the goal is to crack my program and make a keygen.
Good luck.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 15. Feb, 2010
Downloads: 602

Rating

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Solutions

Solution by Coderess, published 09. jun, 2010; download (23 kb), password: crackmes.de or browse.

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Discussion and comments

mcourteaux Author 17. Feb 2010	So, no-one cracked this yet?
Coderess 19. Feb 2010	I keygened it Coderess blcb-qBpP-RftD-BSLt
mcourteaux Author 20. Feb 2010	@Coderess: Good Job! Was it difficult? I don't think so?
Xspider 20. Feb 2010	no wasn't difficult :) Xsp!d3r yPON-clqR-ftDB-slTM crackmes.de TQRt-CJBP-icbr-FTdb Algo start at 004014F4 and ends at
Xspider 20. Feb 2010	and ends at 00401633 i guess :p
NicoPyright 22. Feb 2010	NicoPyright ofTL-qBqf-dgsr-FTdb Good Crackme!
Coderess 08. Jun 2010	I lost the solution, so I had to write again

mcourteaux's You Can't Crack Me (Anti Dbg)

Download YouCantCrackMe.zip, 173 kb (password: crackmes.de)
Browse contents of YouCantCrackMe.zip

This crackme is (for me) uncrackable.
I know the alogrithm. So I can post it if no-one can find it.
I build in a good anti-debug function. I tried it out, and it works.
So comme on! And let us see what you can!

The maximum lenght of your username is 50.

Of course you have to write a keygen to win!

Enjoy cracking!
mcourteaux

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 16. Feb, 2010
Downloads: 779

Rating

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Solutions

Solution by Coderess, published 12. jun, 2010; download (32 kb), password: crackmes.de or browse.

Coderess has rated this crackme as nothing special.

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Discussion and comments

BoRoV 17. Feb 2010	I think difficulty is 3 bkz easy sniff serial Username: BoRoV Serial : BseiuaXgJaLcZXYGVQwF
mcourteaux Author 17. Feb 2010	@BoRoV: Dit you get problems with the message "You are trying to hack me"? This serial works. This is my second crackme, so I don't know verry good witch difficulty I should choose.
BoRoV 17. Feb 2010	no, newer see that
Coderess 17. Feb 2010	Coderess JRygDuPkesaTiBeyMXoJ
mcourteaux Author 18. Feb 2010	Good Job! now make a keygen. Same question: Dit you get problems with the message "You are trying to hack me"?
Coderess 18. Feb 2010	I patched anti-debug trick
NicoPyright 22. Feb 2010	NicoPyright cJyoaPyDmgNLTuecmXXs
Hack_ThE_PaRaDiSe 23. Feb 2010	Why do you consider this crackme as uncrackable? Are u kidding or something?
/x43/x30/x64/x65 24. Feb 2010	never got the message.. patched the timer..
TQN 04. Mar 2010	My keygen: http://www.mediafire.com/?d2wnuytymzt.
Coderess 11. Jun 2010	Solution uploaded

mcpower's Crackme (2000)

Download cm1.zip, 185 kb (password: crackmes.de)
Browse contents of cm1.zip

Have phun !

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 05. Jul, 2008
Downloads: 337

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

jE! 05. Jul 2008	if 1 minute job need, must be done in separate thread, not in WND_PROC! too ugly ..FGIntRSA..?
IMPosTOR 21. Jul 2008	umm. level 3 for TADP component? procedure TForm1.FormActivate(Sender : TObject); ... procedure TForm1.FormMouseMove(Sender : TObject); ... procedure TForm1.ADP1If_DebugerFound(Sender : TObject); ... procedure TForm1.ADP1If_MonitorFound(Sender : TObject); ...

mcpower's Kegenme 260807

Download cm260807.zip, 3 kb (password: crackmes.de)
Browse contents of cm260807.zip

Maybe too easy for professionals but not too hard for beginners, a good exercise i think.

Task: Make a keygen working for every number.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 26. Aug, 2007
Downloads: 1136

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by zart, published 28. aug, 2007; download (497 kb), password: crackmes.de or browse.

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Solution by alex_ls, published 28. aug, 2007; download (42 kb), password: crackmes.de or browse.

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Discussion and comments

zart 27. Aug 2007	solution submitted - fun keygen, simple but i learned a few things since it used a couple of instructions i've never seen before
FIXER 10. Sep 2007	Pretty easy, but I learned a few things. Nice job.
DigitalAcid 19. Jan 2008	Very nice for beginners to learn some FPU stuff ;).

mcpower's Keygenme220807

Download keygenme220807.zip, 6 kb (password: crackmes.de)
Browse contents of keygenme220807.zip

Task: Create a Keygen working for every name and on every Computer the Crackme works.

Feel free to patch whatever you want during that process but don't forget that they Keygen has to work for the original unpatched Code.

I don't know how hard to do this is on that one, so I gave it a 2, maybe it's more, maybe less,

good luck !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 24. Aug, 2007
Downloads: 400

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Solutions

Solution by mast, published 09. sep, 2007; download (60 kb), password: crackmes.de or browse.

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Discussion and comments

XzzX 24. Aug 2007	Are you sure it is c++? PEiD says "Microsoft Visual C# / Basic .NET" -> so it is .NET. Doesn't look so hard if the xml string is the "correct" answer. Took me 2 minutes ...
qwertydid 24. Aug 2007	He probably did it in C++/CLI, which is the .NET version of C++. So the correct Language should really be .NET
mcpower Author 24. Aug 2007	yes, it's .NET (C#) can you create a keygen XzzX, if it is so easy? please submit your solution.
Wasted_Bytes 07. Sep 2007	The xml string is not a bit big?
Wasted_Bytes 07. Sep 2007	Mistake it can be keygenned ;)

mC-gYv3r's KeyGenMe-1_by_mC-gYv3r

Download KeyGenMe-1_by_mC-gYv3r.zip, 164 kb (password: crackmes.de)
Browse contents of KeyGenMe-1_by_mC-gYv3r.zip

So, here is my first Crackme

Find the rigth serial by using a keygen ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 06. Aug, 2006
Downloads: 685

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Solutions

Solution by jE!, published 27. aug, 2006; download (25 kb), password: crackmes.de or browse.

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Discussion and comments

arox 22. Aug 2006	it's 2nd level, isn't it ??? :) so do i ..... :D
jE! 25. Aug 2006	ok, i will write solution.. don't warry

mC-gYv3r's mC-gYv3r_KeyGenMe-2

Download mC-gYv3r_KeyGenMe-2.zip, 59 kb (password: crackmes.de)
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So, here is my second KeyGenMe

Find the rigth serial by using a keygen

Have Fun :)

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 31. Oct, 2006
Downloads: 411

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

DaBookshah 02. Nov 2006	Nice, the unpacking thingy is pretty good. Ok, I could be completely wrong, but assuming im reading it right: The call to ZwUnmapViewOfSection to unmap the PE header in the new copy of the program - does that actually work? Doesnt look like it.....
red477 03. Nov 2006	Nice crackme in my mind.

++Meat's ASTRAL Crackme 1

Download ASTRALCrackme1.zip, 71 kb (password: crackmes.de)
Browse contents of ASTRALCrackme1.zip

Hi !

I have coded this little thing in a Day in MASM32 (source code included). I hope it will be cracked & enjoyed.

ASTRAL in force !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 20. Jul, 2010
Downloads: 456

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Solutions

Solution by onepatop, published 19. aug, 2010; download (340 kb), password: crackmes.de or browse.

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Discussion and comments

brangelito 20. Jul 2010	I cracked it. Easy one, but should be fun for beginners.
EvOlUtIoN 21. Jul 2010	why you put also source code inside pack? Thiis way it is very easy to crack...
MACH4 21. Jul 2010	Its level1 without the source! MACH4
++Meat Author 21. Jul 2010	I'm in like with putting the sources in the package. I'm wanting some keygens and tutorialz !
TQN 22. Jul 2010	A bug in your crackme: you forget call nseed before the call nrandom(32), so the random string will always be constant. And the data in ASTRALKEY file will always constant to: TSTTARSSARSSTATTASTASASRRRTATRSR.
++Meat Author 22. Jul 2010	Thanks for the tip TQN, I knew it was constant, but for now I will call nseed next time. Thanks !
MACH4 24. Jul 2010	Seeding a random number is not a requirement, its an option! If you want keygens for your crackmes then don't seed. better still don't use the random function at all! MACH4
++Meat Author 03. Aug 2010	Ok, crackme is fixed ! http://astral.tuxfamily.org/sys/crackmes/ASTRALCrackme1.zip Now it's getting harder, no serial fi$hing :)
hacker2010 05. Aug 2010	Plz Post Some Solution.......
++Meat Author 08. Aug 2010	Here is one http://astral.tuxfamily.org/sys/solutions/source_keygen_crackme1_Meat.rar Take a look hacker2010
Wender 18. Aug 2010	What's the job for this crackme? To find a valid key or to patch it? Thanks

++Meat's Meloquynthe - YoLeJedi & ++Meat

Download meloquynthe-yo-meat.zip, 3512 kb (password: crackmes.de)
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Yo !

See the 'readme.txt' file for some informations about it.

"Keygen + Tutorial needed. No f*cking patches. MASM32 POWERED."

Due to the size of the crackme (> 3MB), an *.url file is included. It will allow you to download directly the crackme.

We really hope you'll have fun with it :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 12. Jan, 2006
Downloads: 880

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Solutions

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Discussion and comments

Ank83 12. Jan 2006	this crack me sux ! But really good graphics !

megadoctor's MyCrackme

Download Modify_my.zip, 192 kb (password: crackmes.de)
Browse contents of Modify_my.zip

Easy but tricky...

Read The Readme For info!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 09. Jul, 2006
Downloads: 654

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Solutions

Solution by hiccup, published 26. jul, 2006; download (193 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 10. Jul 2006	Very nice! I enabled the form as request...but add a button is more difficult, also close program...i try
megadoctor Author 10. Jul 2006	Jep it's pretyy hard for newbies.. i think that the next crackme will be in lvl 2 :)
megadoctor Author 14. Jul 2006	Has somedy cracked it?
thehyper 14. Jul 2006	I think I have cracked it. I will pm the link to you.
TQN 15. Jul 2006	My solution at: http://rapidshare.de/files/25554623/Modify_Me_.zip.html.
EvOlUtIoN 19. Jul 2006	Yaeh ok this is the solution i arrived too...but i think the target is to create a new button and to insert it in the form.
hardcoder 20. Jul 2006	what about changing string "STATIC" with "BUTTON".Worked fine here

megadoctor's Ser-Me

Download Ser-Me.zip, 214 kb (password: crackmes.de)
Browse contents of Ser-Me.zip

Read the Readme File fot Info...

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 11. Jun, 2006
Downloads: 1172

Rating

Votes: 3
Crackme is good.

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Solutions

Solution by Tenshi, published 19. jun, 2006; download (428 kb), password: crackmes.de or browse.

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Solution by BugHunter, published 19. jun, 2006; download (222 kb), password: crackmes.de or browse.

BugHunter has rated this crackme as awesome.

Solution by FBI, published 19. jun, 2006; download (215 kb), password: crackmes.de or browse.

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Discussion and comments

FBI 15. Jun 2006	I have 2 of the 3 cracked lol... I have enabled the button: changed a false 0 into a false 1 I have disabled the Message by changing the je jump into a jne. ( I think it was a je jump ) I'm too much of a newbie to crack the damn thing though lol. Help, please PM or post. PM will keep this post clean.
Daemon 15. Jun 2006	This solution was rejected because of little size, but i dont know what i have to written else: 1. To Enable the Button 'Register', you can change follow bytes (from 2 row to 3 row): 00000319: 3A 40 00062DB0: 00 42 00062DB1: 00 6F 00062DB2: 00 6D 00062DB3: 00 65 000660CD: 08 09 000663FF: 00 C9 2. To remove the messagebox 'Get Rid of the Little fucker' change original command from 0045973D FF52 50 CALL DWORD PTR DS:[EDX+50] to 0045973D 32C0 XOR AL,AL 0045973F 90 NOP 3. To Make the program accept any Serial see next steps 4. To Make an Message saying 'Right Serial' and to Remove the Error saying 'Wrong Serial' change from 00459758 . 45 72 72 6F 7>ASCII "Error",0 to 00459758 . 47 6F 6F 64 2> ASCII "Good!",0 and from 00459768 . 57 72 6F 6E 6>ASCII "Wrong Serial !",0 to 00459768 . 52 69 67 68 7>ASCII "Right Serial !",0
megadoctor Author 15. Jun 2006	i think this should be in Level 2...
zairon Moderator 15. Jun 2006	>but i dont know what i have to written else I told you what you have to write. Look at the first point, here's your description: " 1. To Enable the Button 'Register', you can change follow bytes (from 2 row to 3 row): 00000319: 3A 40 00062DB0: 00 42 00062DB1: 00 6F 00062DB2: 00 6D 00062DB3: 00 65 000660CD: 08 09 000663FF: 00 C9 " Do you really think someone will understand why you have to change these bytes? Sorry but I don't think so... Imho you have to explain how you reach the solution. I would like to see what others think about this type of solutions.
FBI 16. Jun 2006	I use W32Dasm and Heiw. Open W32Dasm, and load ser-me. Click the String Refence button ( beside the print button) Strn Ref is what it looks like.. Once open, find the String Refence called False... it's just False, there should be one named True as well My Guess is that it's for enable = true enable = false, what do you think :P You do need to change the False statement... You might want it too look similiar to the True statement below it, what do you think... Hope this helps, if you need more help let me know: zex.ath.cx #zex msg FBi
Daemon 16. Jun 2006	Thank you FBI. I thought, that every one, who load this serme in Disasm, will understand, why this bytes must be patched. I dont supposed, that some one will be interested in explaining of this simple steps. The detailed solution takes much more times, that crack process :) But i will try to do this for more complex crackmes.
yzhr 16. Jun 2006	I have a problem to find where the program check the Serial and Loginname.
megadoctor Author 16. Jun 2006	yzhr - i doesnt check, you just have to make an Message saying that it is correct ;)
megadoctor Author 16. Jun 2006	Come on somebody! Submit a Solution... its really easy :\|
megadoctor Author 19. Jun 2006	Nice work, FBI keep it up!
hardcoder 10. Jul 2006	I've tried something different, Patched 00437958 814B 04 00000>OR DWORD PTR DS:[EBX+4],8000000 With NOP, so both of the textbox and button got enabled and patched , 00455ED6 E8 5DB2FFFF CALL cked.00451138 With NOP, so it prevents from exiting finally WRONG with GOOD regards
hardcoder 10. Jul 2006	Oh I forgot, I patched , 00455EC8 . /74 0A JE SHORT Ser-Me2.00455ED4 with nop too
hardcoder 10. Jul 2006	so, fool of me it is the solution of Ser-me 2

megadoctor's Ser-Me 2

Download Ser-Me2.zip, 204 kb (password: crackmes.de)
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Read The Readme File For Info!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 26. Jun, 2006
Downloads: 1053

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by Tenshi, published 18. jul, 2006; download (410 kb), password: crackmes.de or browse.

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Solution by MiniMinou, published 05. jul, 2006; download (209 kb), password: crackmes.de or browse.

MiniMinou has rated this crackme as quite nice.

Discussion and comments

megadoctor Author 27. Jun 2006	damn... i forgot how to remove jumps in ollydbg, can someone help?
Ank83 27. Jun 2006	Hi megadoctor. If you mean noping a jump, just right click on the address and chose Binary\Fill with NOPs. Or more simple is to go at that address press SPACE and insted of the text that will have into the text box enter NOP and press Enter. I hope this will help you. Regards Ank83
MiniMinou 28. Jun 2006	Hey all, just finished my solution. Hope you will enjoy it! Any question ? Ask me ! Don't be shy ! It was quite easy to do, so if you take the time to do it, divide your work, you'll finish it too !
MySacrafice 28. Jun 2006	Ya, I am noobie at cracking, I am not sure what API's to look for. I am working in olly debugger and I have, under the reccomendation of a friend who dosent crack, but said that the endable window api is responsible for the activation / deactivation of butting in GUI. So I found 3 references to that in the program, makes sense, 3 important buttons, (textbox, button1, button2) and looked at the code. I nop'd off any jumps that might not allow the API call to run, but with no change to the program :(
megadoctor Author 28. Jun 2006	Patcing IS allowed!
c_07 28. Jun 2006	MySacrafice, a good way to start is to look for GetDlgItemTextA, SendMessage, etc. or similar APIs because the serial must at some point be retrieved from the edit. That's just a general idea.
MySacrafice 29. Jun 2006	I looked and didnt see any GetDlgItemTextA, MiniMinou said he had a solution but I dont see one yet, must be in qeue, could anyone help me with how to enable the buttons, I think I might be able to get it after that.
Tenshi 29. Jun 2006	hi, is there an goodboy message ?or the programm just close ? if the programm just close, i had an solution ^^ regards
c_07 29. Jun 2006	First disable the routine that checks to see if you've enabled the window (hint: IsWindowEnabled), then maybe insert some code?... or just use ResourceHacker :D
Tenshi 29. Jun 2006	i know, i had done all. but the questions was if there is a message that the programm is "register" or if the programm just close if the serial is right....
c_07 29. Jun 2006	Oh, I was actually trying to answer MySacrafice's question (sorry, should have specified).
Tenshi 30. Jun 2006	oh, im sorry too ^^
toshimi 04. Jul 2006	explain more, step 5, pls.
c_07 04. Jul 2006	I can't seem to figure out how to disable the ExitProcess without having the app crash. How can I get it back into the normal message loop without freezing the code?
megadoctor Author 04. Jul 2006	i see that its pretty hard for newbies... i dunno i haven't cracked ir my self :)) im too much of a newbie to crack my own Crackme :)) but my friend tests them... he cracked this fucker ;)
thehyper 05. Jul 2006	c_07,look at 0x455ed6. nop the call it out if you don't want the crackme to exit :)
MiniMinou 06. Jul 2006	Haaa, there it is ! Hope you will all learn from it !
hardcoder 10. Jul 2006	I've tried something different, Patched 00437958 814B 04 00000>OR DWORD PTR DS:[EBX+4],8000000 With NOP, so both of the textbox and button got enabled and 00455ED6 E8 5DB2FFFF CALL cked.00451138 With NOP, so it prevents from exiting finally WRONG with GOOD I patched , 00455EC8 . /74 0A JE SHORT Ser-Me2.00455ED4 with nop too

Discussion and comments

shorn 10. Oct 2006	Hrm.. on Windows XP SP2, the quit button doesn't work. Gotta get into Task Manager -> Kill task to kill your program. Bug?
zairon Moderator 11. Oct 2006	No bug, it works.

Send a message to Micke24 »

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Discussion and comments

M\|GHTY K\|nG Author 09. Apr 2009	Come On Guys! It is very easy.
M\|GHTY K\|nG Author 12. Apr 2009	Is anyone tryin' it?
T.0.R.N.A.D.0. 12. Apr 2009	Yeah, I solved it. :) But I may not upload a VIDEO solution, I'll try though. Check PM. ;)
Ultralol 12. Apr 2009	I'm new to crackmes but i have solved 2 or 2 easy ones tho=)And im not familiar with anti dubugging stuff. And this one obviously wont let me debug it. Any hints here?
Ultralol 12. Apr 2009	oh well) solved it) thx
xylitol 12. Apr 2009	Solution sent, PM about the video sent too. :)
M\|GHTY K\|nG Author 16. Apr 2009	To xylitol, Your tutorial was nice and you deserve gold price ------------------------------- Here is xylitol's video solution http://rapidshare.com/files/220556421/solution_video_xylitol.rar
M\|GHTY K\|nG Author 18. Apr 2009	is there anyone else who is writing better solution
M\|GHTY K\|nG Author 24. Apr 2009	Check Hall Of Fame Now, mightytools.co.cc
Kainat 08. May 2009	i like it. thx. r:=length(name); s2:=copy(name,1,3); CharUpper(Pchar(s2)); For i:=1 to r do begin s1:=s1+Ord(name[1]); s3:=s3-Ord(name[1]); s4:=s4 / Ord(name[1]); delete(name,1,1); end; SERIAL := IntToStr(S1)+'-'+S2+IntToStr(S3)+'-'+FloatToStr(S4);

Micke24's TryMe1

Download tryme1.zip, 5 kb (password: crackmes.de)
Browse contents of tryme1.zip

Make a keygen

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Sep, 2003
Downloads: 1895

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Solutions

Solution by HACKERGY, published 17. sep, 2003; download (4 kb), password: crackmes.de or browse.

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Solution by scarabee, published 10. sep, 2003; download (9 kb), password: crackmes.de or browse.

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Solution by sonkite, published 08. sep, 2003; download (6 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 06. sep, 2003; download (4 kb), password: crackmes.de or browse.

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Micke24's TryMe 2

Download tryme2.zip, 5 kb (password: crackmes.de)
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Find the right serial for your name

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Feb, 2004
Downloads: 2034

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Solutions

Solution by xyzero, published 03. mar, 2004; download (9 kb), password: crackmes.de or browse.

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Solution by nEo_TheOne, published 02. mar, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by elfz, published 28. feb, 2004; download (19 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 28. feb, 2004; download (2 kb), password: crackmes.de or browse.

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Micke24's TryMe 3

Download tryme3.zip, 5 kb (password: crackmes.de)
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Make a keygen

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 28. Feb, 2004
Downloads: 1137

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Solutions

Solution by myllan, published 23. mar, 2004; download (8 kb), password: crackmes.de or browse.

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MicroNux's PKG KeygenMe1

Download PKG_KeygenMe.zip, 74 kb (password: crackmes.de)
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PKG KeygenMe1

rules:
No patching
No bruteForcing
No serial phishing
Just Keygen It

for the noob in keygening: unlock the algo bouton and enjoy the algo code !
ready ?, go !

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 12. Mar, 2008
Downloads: 324

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Solutions

Solution by swiftdamnation, published 29. mar, 2008; download (7 kb), password: crackmes.de or browse.

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Send a message to microplant[mp] »

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Discussion and comments

apuromafo 20. Mar 2008	but is easy fished~why not? StrComp function called from 0041F4BB
synak 20. Mar 2008	You can change the unicode string for ".sup" file extension check @ 0041CD58 if you'd like to use SmartCheck to get an initial feel for how this flows.
apuromafo 21. Mar 2008	synak my solution was rejected for bad english~ wel i was serial phish because this can be done in some tool, of team resurrection vb str cmp tool 2.1 too can be used as keygen~ if I can learn english maybe write some better for re -post the solution
jvwarrior 10. Apr 2008	Wtf is the algo button!!! IM A NOOB!

microplant[mp]'s crackme #1 by microplant

Download mp_crackme1.zip, 8 kb (password: crackmes.de)
Browse contents of mp_crackme1.zip

REALLY easy. just to help some beginners to learn and understand how serial calculations *can* work.

Note: only valid keygens are accepted as this one is so damn easy :) (and even that should be easy for beginners)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 26. Dec, 2005
Downloads: 1139

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Solutions

Solution by HMX0101, published 01. jan, 2006; download (163 kb), password: crackmes.de or browse.

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Solution by konstAnt, published 01. jan, 2006; download (22 kb), password: crackmes.de or browse.

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Solution by Ank83, published 01. jan, 2006; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

astigmata 26. Dec 2005	hi, this one is very easy with ollydbg thanks for the newbies like me look at edx
astigmata 28. Dec 2005	Can I make a keygen in javascript ? I found the algorithm
HMX0101 28. Dec 2005	i'm making the keygen in Delphi, its very easy
Ank83 28. Dec 2005	I submit a keygen yesterday, waiting for reply ! It's really easy, like the author said ! This will be my first keygen ! :)
Ox87k 28. Dec 2005	yes is too easy but it's for newbies ;) however, very good job microplant!! I would to make a keygen but i think that the moderators accept max 3 solutions because it's level 1... so space for newbies :)
HMX0101 28. Dec 2005	i have submitted my solution
microplant[mp] Author 28. Dec 2005	astigmata: just submit your splution :) A Mod will review it, and if heÂ´s happy with a KeyGen in JS - IÂ´ll be too. As long as it works, I donÂ´t care for the language itÂ´s written in ;) @all: thx for the nice words :)
Toxide 28. Sep 2009	Though it's old and solved a couple of times, still a fun little KeygenMe. Try 53515-34953-45515 for name and serial hehe :)

MiDi's Crackme#1

Download midicrkme1.zip, 3 kb (password: crackmes.de)
Browse contents of midicrkme1.zip

CD-Check & Keyfile

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 20. Mar, 2003
Downloads: 1490

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Solutions

Solution by Termi, published 21. mar, 2003; download (4 kb), password: crackmes.de or browse.

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Solution by human_thought, published 20. mar, 2003; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

MiDi's Crackme#2

Download midicrkme2.zip, 2 kb (password: crackmes.de)
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Name/Serial

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Mar, 2003
Downloads: 1600

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Solutions

Solution by harlequin, published 30. mar, 2003; download (3 kb), password: crackmes.de or browse.

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Solution by human_thought, published 30. mar, 2003; download (6 kb), password: crackmes.de or browse.

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Send a message to mihafurlan »

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mihafurlan's CrackMe #1

Download crackme.zip, 4 kb (password: crackmes.de)
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Simple VB crackme

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: (Visual) Basic

Published: 05. Feb, 2004
Downloads: 1162

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Solutions

Solution by kao, published 07. feb, 2004; download (1 kb), password: crackmes.de or browse.

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mikeL's crackme1

Download crackme1_mikel.zip, 4 kb (password: crackmes.de)
Browse contents of crackme1_mikel.zip

It's my first crackme, key generating algorithm is very simple, good luck.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 04. Dec, 2006
Downloads: 403

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Solutions

Solution by lithium, published 04. jun, 2008; download (113 kb), password: crackmes.de or browse.

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Send a message to mikkchl »

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Discussion and comments

red477 05. Dec 2006	ahaa, such a nice crackme;) i did it, man;)
red477 06. Dec 2006	a questioin, is this a mistake or intentional? 00401A27 > AC LODS BYTE PTR [ESI] 00401A28 . 0FCB BSWAP EBX 00401A2A . 8A1C31 MOV BL,BYTE PTR [ECX+ESI];alway the same char!!!??? ... 00401A42 . 49 DEC ECX 00401A43 .^75 E2 JNZ SHORT cm.00401A27 at the commented line, the ecx is decreased but the esi has been increased by the instruction lodsb, so... If it is intentional, I am sorry for bothering.
mikeL Author 06. Dec 2006	My bad. It's a mistake, but it don't change general serial validation algo very much, anyway thanks :) Cheers
Zaphod 06. Dec 2006	I found the serial for my name, but I can't say I really understand what's going on in this crackme - yet :)
red477 07. Dec 2006	@mikeL, you are welcome. And you are right, the algo doesn't change much. Nice crackme, anyway.

mikkchl's FlamingPoop

Download register.zip, 13 kb (password: crackmes.de)
Browse contents of register.zip

My very first crack me. It's written in vb.net.
This is also my first vb.net program.

Virus scan: https://www.virustotal.com/file/4b90afe7.../analysis/ (0/43)

Just to proof that it's possible, have i already made a keygen to my program.

Enjoy!

Help:

All valid keys a encrypted.

Here is some valid keys generated by my keygen:

X>U&0B>?>X&B=BWBXB?X?&=?& (29450-89692-58781-82862-65765)
||I|JD''+D|I^´+|D´||'^´'^
(88483-26692-84579-82788-65765)
$-K-00]$-SSK£[-$[-$[[$C0£
(69490-07692-24589-68968-86305)
Q*Q/TQ*(_L)(//)/)**L/)/T)
(48473-48692-56775-75882-75735)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 03. Mar, 2012
Downloads: 881

Rating

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Solutions

Solution by draww, published 02. jul, 2012; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

Fatih54102 04. Mar 2012	Man, try to dont use .net, someone can look up your code with reflector.
The So;X 08. Mar 2012	lol @Fatih54102
fasmotol 01. Apr 2012	Easy enough... Just simple search for string "WRONG" and here's it! The problem is with diff patcher for IDA))
cybercrz 06. Apr 2012	i went for the easier way... just changed startup form to form2 and stopped timmer2. is that a possible solution?
TheUnknownProgrammer 14. Sep 2012	Pretty Easy http://screensnapr.com/v/4XT59E.jpg

mindless's Puzzle

Download puzzle-mindless.zip, 19 kb (password: crackmes.de)
Browse contents of puzzle-mindless.zip

Puzzle - KeyGenme

by mindless 23rd Feb. 2008

Level: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

-------------------------------------------------------------------------------------------------------

This is my first crackme so I apologize in case you find it boring, specially hard or specially easy.
Any comments will be much appreciated.

The key is to make a working KeyGen for any username given. It's got some crypto inside and no
anti-debugging protection; hope you find this protection scheme interesting. I'm looking forward for
the feedback since this is my very first attempt of making such things.

Note: I've found some problems running it under Vista and I will try to fix them as soon as possible.

Thank you !

mindless

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 23. Feb, 2009
Downloads: 391

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Solutions

Solution by freesoul, published 05. mar, 2009; download (149 kb), password: crackmes.de or browse.

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Solution by ForFun, published 04. mar, 2009; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

freesoul 24. Feb 2009	sOooLving in process :P
mindless Author 04. Mar 2009	Thanks ForFun for the solution. You're right that I've put more into the thread stuff than in the algo itslef. However I challenge everyone to try what it would really be a level 4 in my opinion: Patch the binary so that it always prints the GoodBoy string for any username/password.

minos's KeygenMe #1

Download keygenme1.zip, 25 kb (password: crackmes.de)
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Name / Serial

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Nov, 2003
Downloads: 1710

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Solutions

Solution by bLaCk-eye, published 29. jul, 2004; download (14 kb), password: crackmes.de or browse.

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mips's Mathemaniac

Download Mathemaniac.zip, 12 kb (password: crackmes.de)
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Very hard.
I wanted to make something like this,and now i made it.
Your's job is to crack it.

Difficulty: 9 - You can't solve this yourself :)
Platform: Windows
Language: Unspecified/other

Published: 05. Oct, 2005
Downloads: 1558

Rating

Votes: 8
Crackme is quite nice.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

deroko 05. Oct 2005	does anyone haw that mandel.dll? I don't hvae it on xp sp2 and win2k =(
jB_ 05. Oct 2005	I guess you have to code it yourself :p
Grivier 07. Oct 2005	I tried this one,but it's piwing me off,i found that i need to code an dll that will start it. anybody has a clue where to find functions,
mips Author 30. Oct 2005	I see that it's hard for the ones who don't have alott exp. look for something at: http://mathworld.wolfram.com/LaplaceTransform.html if it's too big hint delete this tread mips
jB_ 30. Oct 2005	First part solved, but I had some difficulties (and actually no available time) with the last part. I'll look at it next week.
SatUrN 03. Nov 2005	I solved the first part too. I've coded the lib but at the moment it's empty. Maybe with the hint I can continue. SatUrN
jB_ 05. Nov 2005	"Maybe with the hint I can continue." The hint is for the first part...
scherzo 26. May 2006	Hi mips! This is a very nice crackme. But I don't know if there is a bug or I need a hint... I'll explain: - at 004035A0 you do ESI = 0 - at 00403661 you do DEC ESI (ESI = 0xFFFFFFFF) - at 0040369E always this jump (jb 004035D1) doesn't occur because ESI(0xFFFFFFFF) > EAX. But I need ESI < EAX to complete the key in 00405268 (I already decrypt the key in 405268) using the code in 00403689. Please, tell me something. Thanks, scherzo
ksydfius 09. Nov 2013	8 years later, here goes a hint for the last part: think bigger additional notes: 1. the laplace hint is ONLY for the first part 2. jB_ is correct, you need to code DLL yourself 3. if memory serves me correctly, scherzo's point should be worth looking into 4. i dont remember finding any bugs 5. for your motivation, i know someone who had this done in about a week the rest is up to (maybe a lot of) maths, analysis, and some ingenuity mips and mods: please delete this post if it contains too much info thanks mips for the fun, i like it
h4rdc0re 02. Aug 2015	10 years and there isn't any solution yet... WTF?!!

Misanthropic's korncrackme2

Download CR4CK-M3_][.zip, 86 kb (password: crackmes.de)
Browse contents of CR4CK-M3_][.zip

lame crackme, simple keygen it.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 01. Jan, 2005
Downloads: 1694

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Solutions

Solution by EsKiMo, published 27. aug, 2005; download (1 kb), password: crackmes.de or browse.

EsKiMo has rated this crackme as nothing special.

Discussion and comments

Misanthropic Author 28. Dec 2005	the crackme is no longer fully functionally. b-coz the domain has expired... there was a php page that calculated the base64 hash of the username.... you can implement a function that makes this calculation inside the crackme if you want...otherwise sorry ppl :(

Solution by tetman, published 23. sep, 2015; download (6 kb), password: crackmes.de or browse.

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Solution by acruel, published 23. sep, 2015; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

tetman 17. Sep 2015	I really congrats everyone who resolved this crackme.
Matteo 18. Sep 2015	solved, i will maybe make a solution if noone will post one in a month, try it :)
stevexbv 19. Sep 2015	very fun, i_enjoyed ;)
Romop5 20. Sep 2015	Resolved. It wasn't so bad at all, but I managed to understand the length of has badly and that slowed me down a lot. :)
Ethereal_x0r 21. Sep 2015	Solution sent. Password is: congrats_on_resolving_this_crackme
Romop5 21. Sep 2015	Ethernal, you shouldn't have post the password here. It's against this page's rules ! Read this http://crackmes.de/faq/ :)
Ethereal_x0r 22. Sep 2015	Sorry. I didn't remember that. Won't do it next time.
evaboy 25. Sep 2015	@Ethereal, l love your solution tutorial. You are great.

~misunderstood~'s keygenME#1 by misunderstood

Download keygenME1.zip, 103 kb (password: crackmes.de)
Browse contents of keygenME1.zip

This is my very first keygenME.
It is coded in C and runs in the DOS-Prompt.
The objective is to code a keygen (or at least to find out the correct algo), which is not as easy as it maybe looks like at the first view.
Good luck! ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 18. Jul, 2008
Downloads: 612

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by obnoxious, published 21. jul, 2008; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

Iñaki Viggers 17. Jul 2008	There's a bug. Pressing just Enter for Name and Serial gives the "congratulations" message.
xylitol 17. Jul 2008	@Iñaki Viggers because serial is not calculated ;)
~misunderstood~ Author 18. Jul 2008	@Iñaki Viggers: you´re right, thanks...I hope it´s clear that this is NOT the wanted solution ;). I´ll fix it immediately.
zairon Moderator 18. Jul 2008	[New version uploaded]
Iñaki Viggers 18. Jul 2008	Right, that's clear. I was just being mean.
MACH4 18. Jul 2008	Nice one! Managed to reverse this one right back to original source code! Very enjoyable! and good practice on an easy keygenme...
~misunderstood~ Author 19. Jul 2008	@MACH4: Thank you :)! I´m glad you enjoyed it.
MACH4 19. Jul 2008	Well I particularly liked the style in which this one was written. Very clean coding, no unnecessary obfuscation, yet the code don't want to release clues! I don't want to sound bold, just that a good crackme deserves acknowledgement. going on recent ratings you should consider increasing the level to 3 perhaps! Anyway I'll leave others to submit a solution for this one( too many solutions flying around at the moment).
obnoxious 19. Jul 2008	Well Mach4 you should try looking at my solution(if it gets approved) and then think whether its rating should decrease or increase ;)
MACH4 19. Jul 2008	all depends if you have explained the routine! just BP on memCpy and reading the dump wouldn't be a solution! but then it's not for me to judge...
~misunderstood~ Author 19. Jul 2008	^^ finding out one serial is NOT a solution...it´s important to understand how the serial is calculated...as I said above, the objective is a keygen.
obnoxious 19. Jul 2008	if i just BP'ed at memcmp wd i be able to write a keygen. People usually tend to over look the easier possibilities. Btw MACH4 i dont mean to be offending you I have learnt a lot reading your tuts. @~misunderstood~ i donot do serial fishing ;)
~misunderstood~ Author 19. Jul 2008	@ obnoxious didn´t want to offend you either...looking forward to see your solution :)
obnoxious 19. Jul 2008	No buddy m not offended ;)
MACH4 19. Jul 2008	@obnoxious No I'm not offended, perhaps it was me that was a little abrupt! If you have traced what the algo is doing you would agree that it's plain as day, yet not that easy to interprete which is what makes it a nice challenge, and just maybe a higher difficulty than marked. I would be delighted if you could prove me wrong! As for proof of full reversing this, if ~misunderstood~ pm's me his email, I will send him my source
~misunderstood~ Author 19. Jul 2008	@MACH4 I checked your sourcecode and found that the algorithm is 100% correct/equal to mine ;)...I´ll take the time to answer your mail later on. Thanks for investing so much time to deal with the code :)...it´s really interesting to compare.
~misunderstood~ Author 21. Jul 2008	@obnoxious: thanks for posting a solution, you´re completely right ;).
obnoxious 22. Jul 2008	thats ok but i gave two ways of getting the valid serial 1. search and replcae 2. search and subtract which 1 did you use in your source
~misunderstood~ Author 22. Jul 2008	Subtraction ;) If you want to see it, PM me.
obnoxious 22. Jul 2008	yeah but the first option was better so i wrote the keygen using the 1st option ;)
~misunderstood~ Author 22. Jul 2008	...well, that´s your opinion.

mjesun's Lite Crack

Download LtCrack.zip, 1 kb (password: crackmes.de)
Browse contents of LtCrack.zip

This is a beautiful 'packing' routine. You can do everything you want to discover the password, but try to do it without bruteforcing.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Assembler

Published: 16. Oct, 2008
Downloads: 507

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by indomit, published 24. oct, 2008; download (3 kb), password: crackmes.de or browse.

indomit has rated this crackme as quite nice.

Solution by rdk3020, published 24. oct, 2008; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

user2k 19. Oct 2008	looks like lots of data is lost, shl 3 [losing 3 highest bits from first compare value per cycle] and rcr 3 [lost 2 bits from second value compare] bruteforcing lost bits could be the only solution [or iam doing it wrong :)]
Zaphod 20. Oct 2008	Yeah, it looks like bruteforcing is necessary, but maybe there is another way. There must be, since bruteforcing is forbidden :)
indomit 20. Oct 2008	This algo cannot be reversed, too many passwords to meet check. For example: o)R`4<L k-Rg8;Y t6R{.=V j/;Sx;VJo!Q ~53Fr=V*[KE But with these keys program decodes incorrect code. So we need some additional info about encrypted code, and analyze it.
indomit 20. Oct 2008	P.S. I found these keys using random brute over a couple of minutes.
main 20. Oct 2008	Hmm... How to solve this without bruteforcing?
cyclops Moderator 20. Oct 2008	I think the decrypted code must popup a messagebox. So we may need to code a demo routine+strings, then find the hex codes and compare with 'packed' code. But making a demo code can arise too many possibilities! With only 3 bits of last 6 chars we cant deduce any thing...(Or did all of us schooled?)
user2k 20. Oct 2008	1 bit from rcr per 72 cycles * 16 password len [ebx] * 3 bits lost from shl [6-th to 72] = only 27216((72-6)8) = 1216512 tries : if eax==0 and ecx==-1, is it brute ? :) [calculations after third beer :P]
mjesun Author 21. Oct 2008	hi everybody! first of all, thanks for comment this crackme. Bruteforcing is not forbidden, since I say in the description 'but try to do it without bruteforcing'. I always liked crackme's which wants to resemble real-life protections, so, I like to allow everyting over my crackme. I said that bruteforcing is not recommendable because of the high level of possible combinations, and I think it should be interesting to try to solve it without this technique.
indomit 21. Oct 2008	We can assume there are some operands or text strings in an encrypted code, but ignorance of the length of the key makes decoding more difficult.
user2k 21. Oct 2008	i said 1216512 ? better , al[8 bits] in eax overwrited at the begining of loop, so *256. and now i think there could be a better solution, overwriting that al with enc[idx] could be the answer, [btw the only thing we know that there must be ret at end, calls could be far calls cause of virtual alloc, and could be there getprocaddr] but for now trying to recurse and brute lost bits... we'll see...
rdk3020 21. Oct 2008	mjesun Don't give any clues yet! Hehehe
user2k 21. Oct 2008	there is no need for clues, its as fun as making fallout in 30 minutes :)
rdk3020 21. Oct 2008	Finally! Got it! But I must say it took me quite a lot of time. So mjesun, you are responsible for the health issues caused by late night reversing.
rdk3020 21. Oct 2008	Please, give me some time to write the tut to submit the solution.
indomit 23. Oct 2008	[deep-drawn sigh] Finally, I found it... It took a very very very long time :)
mjesun Author 24. Oct 2008	I am really, really pleased to read both solutions. I encourage anybody that cannot solve this crackme to read both! My congratulations for indomit & rdk3020! And for everybody, i hope you enjoy this crackme, and as i said a few days ago, I always liked crackme's which wants to resemble real-life protections... :D
aodrulez 12. Nov 2008	quite similar to my technique... :) ... n i think urs is much more better :). That was a beautiful one.

MLGCrax's Linch's Premium CrackMe

Download LPCMv1.zip, 74 kb (password: crackmes.de)
Browse contents of LPCMv1.zip

This is my first CrackMe coded in Cmd (Batch).
First it looks easy but at the second moment you have to
search, Jump and so on ;)

I hope you enjoy it :D

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 25. Jan, 2016
Downloads: 217

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Solutions

Solution by Tnavarro, published 09. feb, 2016; download (656 b), password: crackmes.de or browse.

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Solution by apuromafo, published 09. feb, 2016; download (1 kb), password: crackmes.de or browse.

apuromafo has rated this crackme as nothing special.

Solution by oddcoder, published 09. feb, 2016; download (826 b), password: crackmes.de or browse.

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Discussion and comments

oddcoder 27. Jan, 15:01	I solved it but the fact that I cant find where does Right exist really puzzles me
deurus 27. Jan, 21:00	Sorry MLGCrax but this is not a protection at all. You can access to the batch script in the temp folder. Just enter %temp% as run command and view the full script. Therefore batch converters aren`t a good idea. @shift /0 @echo off :Start echo Welcome to Linch's Premium Software echo Please LogIn with your Account... echo. echo. echo Username: set /p Username= echo Password: set /p Password= if %Username%== xxxxxxxxx goto Pwcheck :Pwcheck if %Password%== xxxxxxxxxx goto Right echo Wrong Login! echo Software isn't activated. pause > nul exit :Right echo Correct Login! echo Your Software is now activated. pause > nul cls echo -------------------------------------- echo I I echo I Thanks for cracking this CrackMe! I echo I____________________________________I echo. echo Language: Batch (cmd) echo By: Linch echo. echo ----Real LogIn Data---- echo Username: xxxxxxxxxxx echo Password: xxxxxxxxxxxxx echo. echo. echo And now make an CrackMe yourself! pause > nul exit
oddcoder 29. Jan, 09:44	actually It maybe considered a bit difficult if it was packed somehow
sadfud 30. Jan, 21:46	advanced resolution here (spanish) https://reversecodes.wordpress.com/2016/01/30/mlgcraxs-linchs-premium-crackme-batch-facil/
_HellDashX_ 02. Feb, 06:56	I dont understand why the mods here lets the people said the solutions in the Discussion and comments area. if you have a solution submit it and wait! you dont have any big "skill" only because you post your solution here.
khaledhlpc 04. Feb, 21:09	Username: TheBadGuy243 Password: BadLogin202

mm@'s crackme 1

Download mm_crackme1.zip, 167 kb (password: crackmes.de)
Browse contents of mm_crackme1.zip

A easy delphi crackme...

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Borland Delphi

Published: 28. Feb, 2002
Downloads: 2512

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Solutions

Solution by code_inside, published 28. feb, 2002; download (2 kb), password: crackmes.de or browse.

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Solution by minos, published 28. feb, 2002; download (838 b), password: crackmes.de or browse.

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Solution by nitrus, published 28. feb, 2002; download (620 b), password: crackmes.de or browse.

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mm10121991's CryptoCrackme1

Download Crackme.zip, 27 kb (password: crackmes.de)
Browse contents of Crackme.zip

hello

your task in this target is to make a keygen

rules: as always no patching only a keygen with a tutorial is a good solution

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 23. Nov, 2010
Downloads: 287

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Discussion and comments

mm10121991 Author 30. Nov 2010	No one is Interested or the crackme is Boring?
hasherezade 01. Dec 2010	I will try it during weekend, because now I'm busy in my work ;)
tamaroth Moderator 01. Dec 2010	I was slightly distracted, but i looked into the code, for me the problem are the equasions, haven't seen anything that uses something like this, so i have to reverse it manually, but only after i finish what i'm doing now.
KKR_WE_RULE 02. Dec 2010	I also check'd the code a lil bit, b4 the exam started.. I couldn't find any standard algorithm with uses those kinda equations. But, may be I overlook'd something.. I'll look at it after the exam, ie on 8th.. GoodLuck tamaroth on reversing this :)
redoC 15. Sep 2012	Here's the whole algo: ------------------------------------------ MIRACL library functions... IOBASE = 10 var7 = 2 IOBASE = 0x3C = 60 var9 = cinstr ("3348sTq1rpTBoWJ2WiCKoeRMiigcME1VXtAUsfrLUiGx") var10 = cinstr ("4n3NWLri2u1rQ6n0pfMdDfkNGvvp6f5Y31pKNCROTZB") var11 = cinstr ("305cltwcKIVk2gRr77V87eE4qfZwhxhNH52VT4KuhtLl") var6 = cinstr ("1nxZ1wwQ8lIhDGGpYCk0nMqL0JHJjMq0gbgNAEXcxgt5") IOBASE = 256 var8 = cinnum (Name) IOBASE = 0x3C = 60 var12 = cinnum (Serial1) var13 = cinnum (Serial2) var14 = cinnum (Serial3) ------------------------------------------ var1 = pow (Serial3, 2) mod "4n3NWLr..." var2 = pow (var1, 2) mod "4n3NWLr..." var3 = pow (Name, 2) mod "4n3NWLr..." var4 = pow (Serial1, 2) mod "4n3NWLr..." var1 = pow (Serial3, 2) mod "4n3NWLr..." repeated? ------------------------------------------ var1 = var1 * Name mod "4n3NWLr..." var5 = var1 * 2 mod "4n3NWLr..." ------------------------------------------ var2 = pow (Serial1, var2) mod "3348sTq..." var3 = pow (Serial2, var3) mod "3348sTq..." var4 = pow ("1nxZ1...", var4) mod "3348sTq..." var5 = pow ("305clt...", var5) mod "3348sTq..." ------------------------------------------ var2 = var2 * var3 mod "3348sT..." var4 = var4 * var5 mod "3348sT..." ------------------------------------------ Final condition: var2 == var4 ... if you can solve this than you can post solution or write message to me

mm10121991's keyfileme1

Download keyfileme.zip, 15 kb (password: crackmes.de)
Browse contents of keyfileme.zip

mm1991

hello,your task is to do a keyfile maker
the protection is easy.

rulez:
1)no patching, no self keymaker
2)only a keyfile maker is a good solution

good luck

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: C/C++

Published: 04. Aug, 2010
Downloads: 402

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by onepatop, published 12. aug, 2010; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

mm10121991 Author 06. Aug 2010	Hi mates, No one tried to solve this one ???????? It's not Hard!
onepatop 06. Aug 2010	Great crackme! Took me 2 days but i loved it.
mm10121991 Author 07. Aug 2010	Thank you onepatop.
EvOlUtIoN 07. Aug 2010	quite good, too lazy to write a tut, but i solved in less that an hour. The only problem in my opinion is that only 5 chars names are good.
mm10121991 Author 07. Aug 2010	very good, EvOlUtIoN.
mm10121991 Author 15. Aug 2010	Perfect!!!!!!! , Onepatop.

_MMx_'s MMx' 1st keygenme/challenge

Download mycrack.zip, 35 kb (password: crackmes.de)
Browse contents of mycrack.zip

Platform: Windows (tested on XP SP2, 7 RC1)
Language: Visual C++ 8.0
Packer/protector: none

To solve this one you will need a simple yet not too well known algorithm that I believe will prove quite difficult for some people to figure out.

Only working keygen will be accepted as solution. That shouldn't require too much extra work since finding a name/key pair is as hard as writing a keygen (unless I made a misstake). A couple of words about how you did it would also be nice ;-)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 20. Aug, 2009
Downloads: 435

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Solutions

Solution by simonzack, published 24. oct, 2010; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

_MMx_ Author 08. Sep 2009	Heya guys! Anyone still working on this? Need any hints?

mndg's gama

Download 02_crackme_stage3_gama.zip, 8 kb (password: crackmes.de)
Browse contents of 02_crackme_stage3_gama.zip

From a serie of crackmes I'm developing for my wargame page

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 05. May, 2014
Downloads: 359

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Solutions

Solution by baderj, published 13. nov, 2014; download (158 kb), password: crackmes.de or browse.

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Discussion and comments

korsader 09. May 2014	Only bruteforce - deeper
idid231 10. May 2014	printable or not? not sure what's purpose of this crackme
vani172 10. May 2014	Am I just supposed to get a valid serial message? If so then this is too easy.
Duraven 10. May 2014	I would say the goal of this crackme is to get the password
Seonid 12. May 2014	It is, however the OP does not make that clear and the solution itself requires a brute-force approach once the encoding function is identified as it in effect creates a hash. Personally I stopped when I RE'd that function as it's not RE any more beyond the trivial patch to get the GoodBoy.
Unknown Coder 15. May 2014	<h1>Very easy</h1>
mtriple 23. May 2014	i spent lot time on this code with no success, im noob but i pass the wrong mssg which is considered as true JNZ value, i think the file has been patched with wrong statement, i cannt analyze this one cmp eax, 0B528B18Bh its do this : 1- MOV DWORD PTR DS:[ESI+26],EAX how i can check ESI value ? 2- some or and xor but i cant analyze it .
korsader 24. May 2014	I found the right key - eDDQDR
Duraven 24. May 2014	@korsader Congratz. I tested all the possibilities for 5 characters but couldn't be bothered to run brute-forcer for more, how long did it take your prog to get the correct password?
korsader 25. May 2014	@Duraven Len key = 6 Alphabet 'abcdefghijklmnopqrstuvwxyz' find key 30 second
mtriple 25. May 2014	so any idea of how ? did u do it by analyzing or some tools ? i think the point is to analyze doesnt it ?
mtriple 25. May 2014	tha key is valid but its not the right key , check this owner site : http://yoire.com/challenges/reversing/pe.stage3/02_crackme_gama.php i tested ur pass is not correct
korsader 26. May 2014	right key-deeper check this site )))
Duraven 27. May 2014	@korsader Could you pm me with your brute-forcer algo? I remember when I quickly wrote a brute-forcer, it was taking much longer
korsader 27. May 2014	http://rghost.net/55889184
DreamiX 28. May 2014	I did not find key but i pathed it and now it always says that key is right. Solution: =Original bytes= 8B B1 28 B5 45 16 6A 40 =Replaces bytes= 8B B1 28 B5 90 90 6A 40
Duraven 30. May 2014	@korsader Sorry to post it that late, I've been busy a little. Thanks a lot for your code, I though there must be a trick, but the only "trick" is the limited character space, thanks again buddy. For a key space, i.e., all visible ascii characters 32-128, brute-force would take much longer :P
Felipeninja 09. Jun 2014	Hi could you pm me with your brute-forcer algo again please ???
amigossq 28. Oct 2014	some keys are : cBPoG\:s`dedPer HdtgnrdWXeDDPdR
baderj 28. Oct 2014	Nice crackme. It can be solved without brute forcing.

modchip's Crackme No. 1

Download m0dchip_Crackme_1.zip, 23 kb (password: crackmes.de)
Browse contents of m0dchip_Crackme_1.zip

This crackme is coded in the obsolete but nice Turbo
Pascal. It's not packed in any way.

Enjoy my crackme!"

Difficulty: 3 - Getting harder
Platform: Windows
Language: Turbo Pascal

Published: 13. May, 2005
Downloads: 1023

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Stardust, published 26. sep, 2007; download (150 kb), password: crackmes.de or browse.

Stardust has not rated this crackme yet.

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Discussion and comments

modchip Author 17. May 2005	Have you guys tried my crackme? :)
haggar 17. May 2005	Actually, I thought also that this is world about HyperCrackme so mods should delete my post too. Yep, I tried this crackme too, but couldn't disassemble it with Olly so I gave up :( Also still working on some others.
modchip Author 18. May 2005	hey haggar, please don't give up. there are other tools you can use for this crackme... :)
gammelnar 18. May 2005	hmm, i felt like cheating. Patched it, so it showed me the correct values =)
modchip Author 19. May 2005	Hmmmm... it's up to you. But the real goal here is to learn how those values were generated. ;)
Oorja-HalT 19. May 2005	Yes just think of crackmes as a 16bit exe and trace . i think i get carried away a bit while tracing openfile Text.dat .Wish i had the same preservance as before.
LaFarge 22. May 2005	Hehe, this one is really nice crackme, tho i'm not used to crack 16bit appz :)
modchip Author 23. May 2005	Really? Thanks LaFarge, hope you enjoy it. :)
modchip Author 27. Sep 2007	Good work Stardust!

modchip's Walanghiyang Crackme

Download m0dchip_Walanghiyang_Crackme.zip, 8 kb (password: crackmes.de)
Browse contents of m0dchip_Walanghiyang_Crackme.zip

========================
m0dchip's Walanghiyang Crackme
========================
T
his is my second crackme. I have written it in Borland Turbo Pascal (as with the first one). The crackme is not packed/protected. I think this will be slightly harder then my first crackme so I will be rating its difficulty as 5/10. I hope you enjoy cracking this piece.

Please don't patch. You could also try writing a keygen. Thanks.

Hope to see you in my next crackme!!!

Greets to: 3h3N6 | J!GS | Bochog | P_A_P_A_geoff | R0MM3L2K5/The_rOOt | Adz | Kaloy | rash | coniackskii | DR_Loverinto | and sa lahat ng parokyano ng Crackmes.de

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Turbo Pascal

Published: 20. Nov, 2005
Downloads: 586

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by Stardust, published 27. sep, 2007; download (130 kb), password: crackmes.de or browse.

Stardust has rated this crackme as boring.

Send a message to mogul »

View profile of mogul »

Discussion and comments

modchip Author 21. Nov 2005	Please try this one folks!
P!N0! 24. Nov 2005	i can't do it... :)

mogul's crackme #1

Download mogul_cm1.zip, 51 kb (password: crackmes.de)
Browse contents of mogul_cm1.zip

name/serial (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 27. Jun, 2000
Downloads: 2213

Rating

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Solutions

Solution by loren, published 27. jun, 2000; download (1 kb), password: crackmes.de or browse.

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Solution by acid cool 178, published 27. jun, 2000; download (1 kb), password: crackmes.de or browse.

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Solution by 4oh4, published 27. jun, 2000; download (4 kb), password: crackmes.de or browse.

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Solution by code_inside, published 27. jun, 2000; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

mogul's crackme #2

Download mogul_cm2.zip, 5 kb (password: crackmes.de)
Browse contents of mogul_cm2.zip

name/serial (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 09. Jul, 2000
Downloads: 1833

Rating

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(we have only 1).

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Solutions

Solution by mankind, published 09. jul, 2000; download (7 kb), password: crackmes.de or browse.

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Solution by dahlia, published 09. jul, 2000; download (7 kb), password: crackmes.de or browse.

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Solution by airw0lf, published 09. jul, 2000; download (5 kb), password: crackmes.de or browse.

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Solution by code_inside, published 09. jul, 2000; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

monads's berkut

Download berkut.tar.gz, 495 kb

Look for an input (there are more than one) argument to get "Good boy!" message.

Difficulty: 4 - Needs special knowledge
Platform: Unix/linux etc.
Language: Unspecified/other

Published: 29. Feb, 2016
Downloads: 411

Rating

No votes yet.
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Solutions

Solution by qsdf, published 12. jul, 2016; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

acruel 05. Mar, 08:32	written in chicken scheme?
monads Author 07. Mar, 21:52	You are evil of RE :) Yes, it is written in Chicken Scheme.
acruel 10. Mar, 00:54	Thanks! ;) And just for your information. $ ./berkut -:? [Runtime options] -:? display this text -:c always treat stdin as console -:d enable debug output -:D enable more debug output -:g show GC information -:o disable stack overflow checks -:hiSIZE set initial heap size -:hmSIZE set maximal heap size -:hgPERCENTAGE set heap growth percentage -:hsPERCENTAGE set heap shrink percentage -:hSIZE set fixed heap size -:r write trace output to stderr -:sSIZE set nursery (stack) size -:tSIZE set symbol-table size -:fSIZE set maximal number of pending finalizers -:w enable garbage collection of unused symbols -:x deliver uncaught exceptions of other threads to primordial one -:b enter REPL on error -:B sound bell on major GC -:G force GUI mode -:aSIZE set trace-buffer/call-chain size -:H dump heap state on exit -:S do not handle segfaults or other serious conditions SIZE may have a `k' (`K'), `m' (`M') or `g' (`G') suffix, meaning size times 1024, 1048576, and 1073741824, respectively. $
acruel 02. Nov, 15:54	submitted a quite different solution from the one by qsdf. i'd rather be an angel of RE :)

monads's Facets

Download facets_main.tar.gz, 4 kb

An introduction to self-modifying code.

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 26. Oct, 2015
Downloads: 346

Rating

Waiting for at least 3 votes
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Solutions

Solution by acruel, published 10. dec, 2015; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

Fatal_90 28. Oct 2015	./facets_main Failed to execute process './facets_main'. Reason: The file './facets_main' does not exist or could not be executed.
monads Author 29. Oct 2015	may be you should make the file executable: chmod u+x facets_main
wcoen 17. Nov 2015	Very easy, for newbies? Sure of that?
patmanpato 30. Jan, 05:22	@wcoen sounds like the bare minimum knowledge for cracking software on linux?
kovyl 13. Mar, 21:12	Didn't realize where self-modifying code was.
NonerKao 27. Mar, 11:17	Good crackme, good solution. Thanks!
monads Author 27. Mar, 15:35	@NonerKao thanks for your kind comment.

monkey's Crackme OS

Download CrackmeOS.zip, 520 kb (password: crackmes.de)
Browse contents of CrackmeOS.zip

Crack my OS. 2 months of coding from scratch and it all goes to waste by cracking it! Read the readme.txt.

Good luck.

Difficulty: 3 - Getting harder
Platform: Multiplatform
Language: Assembler

Published: 04. Jul, 2005
Downloads: 1126

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Otton, published 06. jul, 2005; download (280 kb), password: crackmes.de or browse.

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Solution by ZeroCoder, published 06. jul, 2005; download (281 kb), password: crackmes.de or browse.

ZeroCoder has rated this crackme as quite nice.

Solution by bilbo, published 06. jul, 2005; download (280 kb), password: crackmes.de or browse.

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Solution by TaGaDaPaF!, published 06. jul, 2005; download (276 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Scortile 04. Jul 2005	haha, this one sounds pretty unique to me.. I think I'll give it a try some time, but not yet, I'm sure I need more time for this one than I can spare at the moment..
Oorja-HalT 06. Jul 2005	What exactly is the task. is it 1.To change the crackme information that is displayed when the crackmeOS is selected . 2.Beside is it ok to patch the file 3. you have to create the new file if no1 is yes and no2 is yes and no3 is no i can submit my solution
bilbo 06. Jul 2005	Well, since he doesn't indicate any constrains, I thought we can do what we like better and I submitted mine... Anyway, I am pretty confident that it is impossible to patch directly floppy.img, do you agree?
Otton 06. Jul 2005	Hi. I'm new here and I liked an idea of crack OS. Unfortunately I have impression that I misunderstood the rules or monkey must be joking ;-) Anyway, I uploaded my solution, too. We'll maybe see what will happen ;-) [bilbo] I think so, too. Mainly because direct patching of kernel seems not possible.
Oorja-HalT 06. Jul 2005	hey guys you sre makes me lazy.Now i dont have to write a solution.And yes you cant change floppy image directly. It has to be copied in to a floppy and changed using hexeditor. BTW do you agree that it deserves a this high rating.
monkey Author 06. Jul 2005	Yeah. It took long enough for you to get it. Within the time it took to get the first solutions, I have made some real crack-worthy stuff. Now that I have my own API's and basically a DOS clone that runs it's own executables from a ext2 floppy, so it isn't gonna be so easy next time.
bilbo 07. Jul 2005	[b]monkey[/b], your idea deserves appreciation... I hope anyway next time you will add at least a checksum control, to force us to do some disassembly ;-) [b]Otton, Oorja-HalT[/b], I was saying it is impossible to directly patch FLOPPY.IMG simply because the stuff to patch is gzipped!
Otton 07. Jul 2005	Hi again. [bilbo] I meant that, too (kernel==gzip). [Oorja-HalT] It couldn't be so hard if I could solve it ;-) [monkey] Really nice idea. I think that coding and testing it wasn't just piece of cake. It could be fine base for something harder. First integrity checks could be made in modified stage2 code (I suspected that to be honest). Ok. Should we start to search (code) debugger for v. 2.0 of your OS ? Regards.
monkey Author 07. Jul 2005	Next version is going to test your skills. Now I can run a checksum against itself, and the kernel will load objects which are in my own special format. I suggest you read a lot of cryto stuff because as your probably know, I love crypto :)

monkey's Crackme OS 1.2

Download crackme-os-1.2.zip, 321 kb (password: crackmes.de)
Browse contents of crackme-os-1.2.zip

Crackme OS 1.2

If you thought 1.1 was difficult, wait until you see this. Readme.txt has install instructions.

Difficulty: 5 - Professional problem to solve
Platform: Multiplatform
Language: Assembler

Published: 09. Aug, 2005
Downloads: 740

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by Cippo, published 15. aug, 2005; download (77 kb), password: crackmes.de or browse.

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Solution by TaGaDaPaF!, published 15. aug, 2005; download (140 kb), password: crackmes.de or browse.

TaGaDaPaF! has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

jE! 11. Aug 2005	I changed greeting message, that is need!?
Kuvaldum 11. Aug 2005	And what is so hard ??? For debugging may be, and for static analyze - VERY easy..
jE! 11. Aug 2005	ye, just one JNE killed.. maybe author means other thing??
_khAttAm_ 11. Aug 2005	Not level 6 hard.............. 3-4
monkey Author 12. Aug 2005	How can you rate the difficulty if you haven't submitted a solution?
Kuvaldum 12. Aug 2005	Quote: Your solution to this crackme is being reviewed by moderators.
Kuvaldum 12. Aug 2005	And what is so hard ? Kernel decompilation ? Checksum loop analyze ? Or messages module location ?
Oorja-HalT 12. Aug 2005	On the surface it seems simple you just have to understand the decrytption of loader.bin. However the issue involved are complex. How do you trace the code to understand the decryption. The only way out i think is virtual drive . Beside if you change loader.bin it catches and displays the bad boy message you also have to reverse it. All in all a novel attempt for reversing thats commandble.All credit goes to monkey you have delivered what you have promised

monkey's monkey .exe #1

Download monkey-exe1.zip, 524 b (password: crackmes.de)
Browse contents of monkey-exe1.zip

Its been over 6 months since I have released anything, (completely owned by school), and I haven't even had time to visit the site. Something different I suppose.

-----

Patch the message box, save your patched exe in your solution.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 18. Apr, 2006
Downloads: 846

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by indomit, published 19. apr, 2006; download (4 kb), password: crackmes.de or browse.

indomit has rated this crackme as quite nice.

Solution by HMX0101, published 20. apr, 2006; download (2 kb), password: crackmes.de or browse.

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Solution by SoN, published 19. apr, 2006; download (3 kb), password: crackmes.de or browse.

SoN has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

SoN 18. Apr 2006	I like this one. Thank you. I submitted my solution so you should see what I did soon.
astigmata 18. Apr 2006	nice one test my 8 bytes patch http://thebigjo.free.fr/temp/monkey-exe4.exe
HMX0101 18. Apr 2006	hmmm, a nice crackme... good job, monkey :)
indomit 18. Apr 2006	pretty nice! :) It was so interesting, for newbie like me %)
HMX0101 19. Apr 2006	it can be done with two bytes!
l0calh0st 19. Apr 2006	I say with one byte ;) JPO SHORT 0040104A ==>JPO SHORT 0040103A http://d.turboupload.com/d/528459/OneByte.rar.html
HMX0101 19. Apr 2006	JPO SHORT 0040103E (7B 11) to FA 02... check it out! ;)
l0calh0st 19. Apr 2006	Yeah it works...you jumped that call to messagebox and you know what i have done :)
D3z+ 19. Apr 2006	it can be done without changing a byte... just move the EIP to 1040, after unpacked.
SoN 20. Apr 2006	Sorry, I was looking at the wrong crackme :) Although this was a fun crackme as well.
giga. 20. Apr 2006	i was complete with 0 bytes :))) just dump this file and make new entry point at 00401040 btw: nice crackme is take me 4 minute of my life :)))
BugHunter 24. Apr 2006	If u unpack it first, you did modify more than 0 bytes. Btw quite nice crackme :)

monkey's Monkey Keygenme #3

Download monkey-keygenme3.zip, 4 kb (password: crackmes.de)
Browse contents of monkey-keygenme3.zip

The series continues! Basic math skills are required, some may need their brain.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 16. Jan, 2005
Downloads: 1924

Rating

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Solutions

Solution by Fake51, published 19. jan, 2005; download (4 kb), password: crackmes.de or browse.

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Solution by _HellDashX_, published 19. jan, 2005; download (96 kb), password: crackmes.de or browse.

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Discussion and comments

IronBOSS 09. Oct 2005	_HellDashX, your KG does not work for me.
boof 07. Feb 2007	Leave your comment

monkey's monkey keygen #1

Download monkey_keygen1.zip, 272 kb (password: crackmes.de)
Browse contents of monkey_keygen1.zip

It is not packed, but is hard. Keygen it!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 12. Dec, 2004
Downloads: 3380

Rating

Votes: 3
Crackme is boring crap.

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Solutions

Solution by Lesco, published 27. jul, 2005; download (300 kb), password: crackmes.de or browse.

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Solution by haggar, published 15. dec, 2004; download (63 kb), password: crackmes.de or browse.

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Solution by REA-CrAcKeRtEaM, published 14. dec, 2004; download (61 kb), password: crackmes.de or browse.

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Discussion and comments

TheBurningBush 10. Oct 2014	This says "valid key" with an empty Name and Serial
P41-C 12. Dec 2015	Easy one, took about 30 minutes to reverse and code keygen

monkey's monkey keygen #2

Download monkey-keygen2.zip, 7 kb (password: crackmes.de)
Browse contents of monkey-keygen2.zip

Not packed. Look carefully at the code!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 22. Dec, 2004
Downloads: 1255

Rating

Waiting for at least 3 votes
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Solutions

Solution by JJtRvXX, published 24. dec, 2004; download (10 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 24. dec, 2004; download (33 kb), password: crackmes.de or browse.

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Solution by REA-CrAcKeRtEaM, published 24. dec, 2004; download (64 kb), password: crackmes.de or browse.

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monkey's Monkey Keygen 4.4

Download monkey-keygen4_4.zip, 18 kb (password: crackmes.de)
Browse contents of monkey-keygen4_4.zip

Keygen this crackme.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 07. Mar, 2005
Downloads: 1720

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Kreet, published 10. mar, 2005; download (19 kb), password: crackmes.de or browse.

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Solution by asik, published 08. mar, 2005; download (48 kb), password: crackmes.de or browse.

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Send a message to monsterhunter445 »

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Discussion and comments

DaHandy 02. Mar 2011	I think that this was more like a level 2 crackme... I made a self keygen by showing the EDI in the popup window. The correct serial is in EDI as the popup comes.

monsterhunter445's csharp-crackme

Download advanced-crackme-csharp_(2).zip, 6 kb (password: crackmes.de)
Browse contents of advanced-crackme-csharp_(2).zip

This crackme was written in C#. It is not obfuscated, but is not an easy crackme. Do not under estimate this crackme, but at the same time it is not super hard to crack. Good luck.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 24. Apr, 2013
Downloads: 229

Rating

Votes: 9
Crackme is boring crap.

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Solutions

Solution by jhon, published 28. apr, 2013; download (198 kb), password: crackmes.de or browse.

jhon has rated this crackme as boring crap.

Discussion and comments

Xartrick 13. May 2013	"Do not under estimate this crackme" Level 4 is too high (level 1 and maybe less). I cracked it in about 5 minutes, and it's child's play.
cominox 21. Jun 2013	i give it 0.5/10 it very easy crack ! for the newbiest noobs
Skripter5000 01. Feb 2015	Was really some Kind of fun, but it's very easy. It's also some Kind of obfuscated, because most functions are renamed.

moofy's crackme #2

Download mfyscm2.zip, 1 kb (password: crackmes.de)
Browse contents of mfyscm2.zip

moofy's crackme #2
written in asm on 3/19/07
Level: 1-2/10 depending on what you know

what to do:
find valid serial for your name (hint: it heavily relies on the length)

what NOT to do:
patching
self keygen
etc

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 23. Mar, 2007
Downloads: 964

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by r-Evolution, published 10. sep, 2010; download (358 kb), password: crackmes.de or browse.

r-Evolution has rated this crackme as nothing special.

Solution by starzboy, published 11. apr, 2007; download (4 kb), password: crackmes.de or browse.

starzboy has not rated this crackme yet.

Solution by boonz, published 31. mar, 2007; download (93 kb), password: crackmes.de or browse.

boonz has not rated this crackme yet.

Solution by El_PuPaZzArO, published 11. apr, 2007; download (3 kb), password: crackmes.de or browse.

El_PuPaZzArO has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

r-Evolution 15. Sep 2010	Nice one!!!It's a nice try

moofy's moofy's keyme #1

Download keyme1.zip, 110 kb (password: crackmes.de)
Browse contents of keyme1.zip

Find out what makes the key. No patching.
Hints:
Its packed
The key all depend on your OS version :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 14. Mar, 2006
Downloads: 1007

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by Ank83, published 20. mar, 2006; download (8 kb), password: crackmes.de or browse.

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Solution by l0calh0st, published 20. mar, 2006; download (6 kb), password: crackmes.de or browse.

l0calh0st has not rated this crackme yet.

Discussion and comments

l0calh0st 14. Mar 2006	Easy one ;) thanks for this one.....waiting for next one :)
HMX0101 14. Mar 2006	Hmm... The crackme take some values of my computer... moofy, thanks for the crackme a little bit harder ;)
Ank83 17. Mar 2006	I tested it on SP 1 and SP 2 an the serial was the same ! Does anyone test it on some other OS ?
l0calh0st 17. Mar 2006	Ank83...see windows about box ;)
Ank83 17. Mar 2006	god damn ! It was in front of me and I cound see it ! Thanks l0calh0st ! I cound not understand from where it comes the 1 and 5 (the Ver_Minor and Ver_Major). It's easy after that ittle hint ! Thanks again ! Regards Ank83
l0calh0st 21. Mar 2006	Thanks Ank83 for cool graphics ;)
Ank83 21. Mar 2006	Hey do someone know some good nfo maker ? Thanks Ank83
l0calh0st 21. Mar 2006	Ank, try NFO Builder 2000
Ank83 21. Mar 2006	I have NFO Builder 2000 but I'm not that impresed by it. Anyway thanks l0calh0st. Best Regrds Ank83
fangrenxing 28. Apr, 05:13	key = VersionInformation.dwBuildNumber + VersionInformation.dwBuildNumber + VersionInformation.dwMajorVersion * VersionInformation.dwMinorVersion - VersionInformation.dwMinorVersion + 3293 * VersionInformation.dwBuildNumber;

moofy's moofy's keyme #2

Download km2.zip, 6 kb (password: crackmes.de)
Browse contents of km2.zip

My second keyme, pretty easy. Write a tutorial/keygen after finished and submit it here.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 07. Apr, 2006
Downloads: 1022

Rating

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Solutions

Solution by HMX0101, published 09. apr, 2006; download (24 kb), password: crackmes.de or browse.

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Discussion and comments

astigmata
07. Apr 2006

have you tested this keygenme on ohers computers ?
eax is aways 2

fangrenxing
28. Apr, 05:23

GetUserNameA(Buffer, &nSize);
GetComputerNameA(byte_404111, &dword_402004);
dword_404144 = strlen(Buffer);
dword_404148 = strlen(byte_404111);
dword_404128 = dword_404148 * dword_404144;
dword_40412C = 2 * dword_404128;
dword_404130 = dword_40412C + dword_404128;
dword_404134 = dword_404130 + dword_404128;
dword_404138 = 3 * dword_404134;
dword_40413C = dword_404138 * dword_404138;
dword_404140 = dword_40413C + dword_404128;
dword_40414C = dword_404140 - dword_404128;
dword_404154 = dword_404144 * dword_40414C;
dword_404158 = 0;
dword_40415C = dword_404154 + dword_404158;
dword_404160 = dword_404158 * dword_40415C;
dword_404164 = dword_404158 * dword_404154;
dword_404168 = dword_404160 * dword_40415C;
dword_40416C = dword_404164 - dword_404168;
dword_404170 = dword_404164 * dword_40416C;
dword_404174 = dword_40416C * dword_404168;
dword_404178 = dword_404160 * dword_404174;
dword_40417C = dword_404178 + dword_404144;
dword_404180 = dword_404148 * dword_40417C;
dword_404184 = dword_404180 + dword_40414C;
dword_404188 = dword_404184 * dword_404184;
dword_404128 = dword_404144 + 100;
dword_40412C = dword_404148 + 200;
dword_404130 = dword_404128 * dword_40412C;
dword_404134 = dword_404130 + dword_40412C * dword_404128;
dword_404138 = dword_404134 - dword_404128;
dword_40413C = dword_404128 + dword_404138 + dword_404134 - dword_404130 - dword_40412C;
dword_404140 = dword_40413C / 2;
dword_404154 = dword_404128
* dword_40412C
* dword_404130
* dword_404134
* dword_404138
* dword_40413C
* dword_404140
* dword_40413C
/ 2;
result = 443 * dword_40413C * dword_404134 * dword_404140 * dword_404154;
dword_404124 = 443 * dword_40413C * dword_404134 * dword_404140 * dword_404154;

moofy's moofy's namegenme

Download namegenme.zip, 129 kb (password: crackmes.de)
Browse contents of namegenme.zip

you find a name for a randomly generated serial. its easy, i guess.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 15. Feb, 2010
Downloads: 1372

Rating

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Solutions

Solution by _ghandi_, published 21. mar, 2010; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

acroneshadow 16. Feb 2010	That was fun. Good stuff!
NicoPyright 16. Feb 2010	I upload the soluce. Thank's
Xspider 16. Feb 2010	nice idea :) i was planning to do the same in some day :)
NicoPyright 17. Feb 2010	Jle-11mQv-522tmd-914gmf-y NicoPyrigh I do not know how to program. :-( But i'm happy to work on this crackme.
tojba123 18. Feb 2010	lol, i have a solicion but not a real keygen... every name you enter will work (i hope)
[Dev++] 27. Feb 2010	hey, nice crackme , very easy serial:Iiy-11fyt-522ssm-914xmf-y name:mfwhxwqopy , posted a solution in latin language in my blog, but i don´t know how to program too. and sorry for bad english. :) greetings!
Zakne 03. Mar 2010	kaspersky - Trojan.Win32.Agent.dkyp
moofy Author 03. Mar 2010	kaspersky seems to be the only virus scanner that says this is infected - this should be clean.
johndr 05. Mar 2010	lol i solved it too but... every name you enter...it says "Good Boy!" :p
manorhacker 18. Jul 2010	nice i solved it it looks good next time upload a guid crack me :)
manorhacker 18. Jul 2010	Really strange serials and names as well
-Shadow- 19. Jul 2010	moofy, just so you know, avast says it's a virus too. Perhaps theres a call somewhere that could be interpreted as dangerous?
moofy Author 02. Nov 2010	it shouldn't have one - it was coded on a windows installation that has never seen the internet at all before (not to mention both computers have a virus scanner and scanned on both computers before uploading, the computer it was coded on is my coding desktop). there is nothing malicious in the code - i assure you. i am probably going to update this to add the source code

moofy's moofy's python crackme #1

Download pycm1.zip, 1 kb (password: crackmes.de)
Browse contents of pycm1.zip

fish a key and make a keygen (in another programming language, preferably)

Difficulty: 1 - Very easy, for newbies
Platform: Multiplatform
Language: Python

Published: 18. Jan, 2008
Downloads: 857

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by _chn, published 16. jul, 2008; download (4 kb), password: crackmes.de or browse.

_chn has not rated this crackme yet.

Solution by klefz, published 24. jan, 2008; download (194 kb), password: crackmes.de or browse.

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Solution by lagalopex, published 24. jan, 2008; download (2 kb), password: crackmes.de or browse.

lagalopex has rated this crackme as boring.

Solution by _khAttAm_, published 24. jan, 2008; download (7 kb), password: crackmes.de or browse.

_khAttAm_ has rated this crackme as boring.

The submission of solutions is closed.

Discussion and comments

NONAMEswordman 22. Jan 2008	how to run it?dk.....
TiGa 22. Jan 2008	You need a python interpreter to run it. http://www.python.org/
lagalopex 23. Jan 2008	$ python -V Python 2.4.4 $ python crackme.pyc RuntimeError: Bad magic number in .pyc file For me, its not working... although I found a online service to decompile it...
moofy Author 23. Jan 2008	its compiled/ran in 2.5.1, however i wouldve thought it would work with previous versions.
lagalopex 24. Jan 2008	No its not running and the dis module failed as well, so I used a online service ;)
gantanhao 24. Jan 2008	我看明白了啊，可惜帮不上忙！！
boonz 24. Jan 2008	gantanhao, i totally agree :D
gamma95 11. Jan 2009	Step 1: ######################## gamma@h4x0r:~/Desktop/paper-hva$ python or "license" for more information. >>> import crackme moofy's python crackme #1 There are two parts to this crackme: fish a serial and then you must solve the keygenme Good luck! Enter a key: whattheyuck badboy >>> dir(crackme) ['__builtins__', '__doc__', '__file__', '__name__', 'key', 'yek'] >>> print crackme.key whattheyuck >>> print crackme.yek g0odwerk <-- Yup ! Its seem the fisrt password ######################## Step 2 ######################## >>> import crackme Enter a key: g0odwerk Enter your name: gamma95 Enter your serial: whattheyuck badboy >>> dir(crackme) ['__builtins__', '__doc__', '__file__', '__name__', 'key', 'name', 'serial', 'sp1', 'sp2', 'sp3', 'ukey', 'yek'] #<-- its appear some new variable when #the first condition correct >>> print crackme.serial m0-gam-pygma52m-cma914?Agmpga2-m9443 #<-- phishing serial with username is gamma95 --> Result: The first is password: g0odwerk username: gamma95 password: m0-gam-pygma52m-cma914?Agmpga2-m9443 EOF :) gamma95[at]gmail.com
gradam 16. Jul, 10:51	keygen def name(name): sp1 = name[:-4] + '-' + 'py' + name[::2] + str(len(name[::-4])) + 'm-c' + name[3:-1] + str(len(name) * 2) sp2 = sp1[::2] sp3 = sp1 + '?A' + sp2 + '43' serial = 'm0-' + sp3 return serial if __name__ == '__main__': print 'key = g0odwerk' key = raw_input('name: ') key = name(key) print 'serial = ' + key

moofy's moofy's simple keygenme #1

Download mskgm1.zip, 5 kb (password: crackmes.de)
Browse contents of mskgm1.zip

Simple keygenme. Just find the algo, make a keygen and tutorial and submit it here.

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: C/C++

Published: 12. Mar, 2006
Downloads: 950

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by HMX0101, published 15. mar, 2006; download (25 kb), password: crackmes.de or browse.

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Solution by Ox87k, published 15. mar, 2006; download (53 kb), password: crackmes.de or browse.

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Solution by l0calh0st, published 15. mar, 2006; download (46 kb), password: crackmes.de or browse.

l0calh0st has rated this crackme as nothing special.

Discussion and comments

TWiST 12. Mar 2006	Fixed the exe so that it accepts every serial you enter... http://www.megaupload.com/?d=BDR8WBHG
Ox87k 12. Mar 2006	very easy moofy! i think that it's very interesting for newbies :D btw, great j0b, i'm waiting for keygenme#2
l0calh0st 12. Mar 2006	Very easy..Thanks :)
HMX0101 13. Mar 2006	a easy one, nice crackme :)
SaXoN 31. Mar 2006	Very good stuff man! The absolute basics. No design only focus on the algo i like that. I'll see if i can manage to understand this, i've been having some probs understanding others :\ Hope you'll make more of this stuff :)

moofy's psp crackme #1

Download mfy-pspcm.zip, 52 kb (password: crackmes.de)
Browse contents of mfy-pspcm.zip

This is a PSP crackme. Included are 2 eboot files, a unpatched and a patched one. That patched version should only be used if you get stuck.
The goal of this is to patch the crackme so it shows up with "Cracked" instead of uncracked. After you finish, submit a tutorial to here. Include explanations of what you patch, and what it does.

Hope you enjoy.
-Moofy

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: C/C++

Published: 01. Apr, 2007
Downloads: 696

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by adrahil, published 02. apr, 2007; download (1 kb), password: crackmes.de or browse.

adrahil has rated this crackme as boring.

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Discussion and comments

moon's CrackMe2

Download moons_crackme2.zip, 141 kb (password: crackmes.de)
Browse contents of moons_crackme2.zip

Password

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Aug, 2003
Downloads: 1359

Rating

Votes: 4
Crackme is boring crap.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

ingsoc
10. Aug 2005

Don't bother.

This crackme isn't difficult at all. It requires no brain to solve, just big computing power. I don't know why people make crackme's like that.

This crackme is just an editbox and a check button that MD5's hashes the password. The MD5 hash is compared to a hardcoded value. Nothing more.

There's no shame in having your crackme solved - because it is just that.. a crackme. I don't see why people still make unsolvable crackmes.

moon's CrackMe#3

Download moons_crackme3.zip, 176 kb (password: crackmes.de)
Browse contents of moons_crackme3.zip

Nag, CD-Check, Password, Name/Serial + EnableMes

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Sep, 2003
Downloads: 1724

Rating

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(we have only 1).

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Solutions

Solution by Roma, published 08. sep, 2003; download (8 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 06. sep, 2003; download (7 kb), password: crackmes.de or browse.

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moon's moon's KGme #1

Download moons_kgme_1.zip, 133 kb (password: crackmes.de)
Browse contents of moons_kgme_1.zip

Simple Name/Serial (Delphi)

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Borland Delphi

Published: 21. Aug, 2003
Downloads: 1584

Rating

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(we have only 1).

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Solutions

Solution by _pusher_, published 24. aug, 2003; download (10 kb), password: crackmes.de or browse.

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Solution by scarabee, published 23. aug, 2003; download (5 kb), password: crackmes.de or browse.

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mouradpr/at4re's BrainKiller KeyGenMe

Download BrainKiller_KeyGenMe.zip, 5 kb (password: crackmes.de)
Browse contents of BrainKiller_KeyGenMe.zip

use your brain and write a nice keygen

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 13. Aug, 2009
Downloads: 484

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Torpor, published 20. aug, 2009; download (22 kb), password: crackmes.de or browse.

Torpor has rated this crackme as quite nice.

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Discussion and comments

Xspider 13. Aug 2009	ouh wach a l3awd :)
qpt^J 14. Aug 2009	Standart Version 354-0044-0199-0039
BoRoV 14. Aug 2009	heh... you posted and here :))
Xspider 14. Aug 2009	HVC & Borov powa :)
mouradpr/at4re Author 14. Aug 2009	Required : KeyGen :D Xspider wach asat :d nta m3chech hna
Xspider 15. Aug 2009	lol ana mam3achi mamghadi hna :D btw nice to see you moving to cpp :) walakin matnsach asm ;)
IMPosTOR 19. Aug 2009	Professional version 431-2312-3493-5106 Lite version 429-2312-3493-5106 Standart Version 432-2312-3493-5106
tony 19. Aug 2009	oh! it is so easy ;

moustico's fcf #1

Download fcf1.zip, 16 kb (password: crackmes.de)
Browse contents of fcf1.zip

name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. May, 2001
Downloads: 1817

Rating

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Solutions

Solution by the hellfish, published 26. may, 2001; download (26 kb), password: crackmes.de or browse.

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Solution by Lightning, published 26. may, 2001; download (19 kb), password: crackmes.de or browse.

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Solution by [xorolc], published 26. may, 2001; download (26 kb), password: crackmes.de or browse.

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Solution by sphinx, published 26. may, 2001; download (8 kb), password: crackmes.de or browse.

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Mr.Farshid's RZM Crack Me - Crack Me 4 (11)

Download Crack_Me_11.zip, 107 kb (password: crackmes.de)
Browse contents of Crack_Me_11.zip

Here Is My crack me

steps:
1 - little anti debug method

2 - password cheking

3 - user + pass checking

4 - online activation checking :)

if you slove the user + passchecking passwrod cheking auto bypassed :)

Have Fun

Full Crack :

Activation 1 : Login Complete
Activation 2 : Activation Done - Activation Code : 187****

If YOu found activation code its ok and you Crack my crack me

Good Luck

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 19. Feb, 2015
Downloads: 436

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Solutions

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Discussion and comments

DaoTian007 05. Mar 2015	key func: Testuj() { ... }
Matteo 17. Mar 2015	i think that it is too difficult for me... stupid vb6 :/ but after 2 hours of analysis that is what i have found: -ZwQueryInformationProcess (ProcessDebugPort=7) as antidebug -seems that RC4 is used -a .bat file is created, inside you find this: ATTRIB - s - h - r C:\DOCUME~1\Matteo\Desktop\CRACK_~1\CRACKM~1.EXE ATTRIB -s -h C:\DOCUME~1\Matteo\DATIAP~1\___Kill_MyPro.bat DEL C:\DOCUME~1\Matteo\Desktop\CRACK_~1\CRACKM~1.EXE DEL C:\DOCUME~1\Matteo\DATIAP~1\___Kill_MyPro.bat seems also that it read files in windows dir to make some kind of checksum working in progress for more... when i will have some free time
Matteo 18. Mar 2015	nice news!! solved first part :) happy to see that i'm not a total noob, login 1: "F4rsl-l!d" working for the rest....
Matteo 18. Mar 2015	i think i will skip the activation part as i have no idea how it could work. i have found that this is the website: http://rzm.is-best.net there is a post request, something with cookies, phpsessid. but i don't know php and i know only for what cookies are used for. there is also something with this reg key: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\DisableCMD i have no idea about bat file and reg key... question: is in general a good idea to post the working serial? pro: it can help people con: it removes all the fun in solving it
halsten 19. Apr 2015	Matteo: The login and username will be used to access a Persian forum's account "http://rzm.is-best.net/users/stop/", the first part is trivial to get, but I don't get the point in doing the second part, def not an online activation per se, and therfore I think it shouldn't count as a valid crackme. And I agree VB6 is stupid. :)
Matteo 20. Apr 2015	what i did is register on the forum (with the help of google translate) and: - if i input my valid user & pw (used on registration) it block and nothing happens - if i input random data it say you loose - if i do both while offline it say step 1 done i have found also this: "http://rzm.is-best.net/2-.html" if you visit there is a textbox and it say wrong pw if you confirm i think that password is server-sided so you can't find (you have to bruteforce and it takes forever) what someone could do is to find where it sees if pw is correct or not and patch it but i don't think is good solution
halsten 20. Apr 2015	Matteo: There was a link to the activation part, I can read the page normally, but I can't understand anything cause I don't speak Farsi, but as you said its correct its server side and its pretty much pointless. There was actually 2 strings generated from the binary one of them was generated from a base64 encoding. Not sure if you got that part or not. I did try and see if it the right one, but I don't think so it worked. Either ways, this part of the crackme is pointless and not valid. The crackme has lots of bugs programmatically and logic wise as well.
Mr.Farshid Author 25. Apr 2015	try that not to hard its not stupid mybe your thing is stupid :) no activation with no idea and no programming is good becuse ... good luck :)
SinaDiR 14. May 2015	It's fully shit, it's serverside check routine, here is the U/P for the first part=asdqwe:123123 the last part is web based again and the author just has access to password, so u'r cheater and I think you try to make visitor for your website, also it's completely bruteforcable to get last 4 char of password, here is RCE community it's not your stupid idea area !!!

MR.HAANDI's Climb

Download climb_keygenme.zip, 26 kb (password: crackmes.de)
Browse contents of climb_keygenme.zip

Look behind the recursion and solve the little math riddle ;)
I used .NET without obfuscation again because the main task is once more to understand what the algorithm really does
and to keygen it elegantly, that's why I'm saving your time by using .NET.

Maybe without obfuscation it is more a level 3 than a 4, but let's just see whether you can solve it ;)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 08. Mar, 2008
Downloads: 480

Rating

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Solutions

Solution by TaGaDaPaF!, published 03. jun, 2008; download (92 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 08. Mar 2008	Can you tell us from which continent or better from which country the person is born?
HMX0101 08. Mar 2008	@Ox87k: "Born in Clermont-Ferrand, in the Auvergne region of France", he is very known for a probability theory :D Btw, seems to be a nice algo... short and easy to understand, i'm not a math freak but i think i can do it :)
w02057 23. May 2008	Is it Blaise Pascal?
MR.HAANDI Author 03. Jun 2008	Congrats, TaGaDaPaF!, that's just the way I wanted this crackme to be solved ;) (Which is more like a math riddle like my previous ones.)

MR.HAANDI's Intersection #1

Download Inversection_#1.zip, 138 kb (password: crackmes.de)
Browse contents of Inversection_#1.zip

Your task today is: Find out what the hell is going on!
To patch or to bruteforce is forbidden, as always.
And now, I'm quite sure that (if I did everything right)
this keygenme will NOT be solved >:-)

For more info look inside the archive.
*It is not level 9 because NO anti-debugging or obfuscation measures were taken here; so, have fun, it's pure math ;)

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: C/C++

Published: 28. Sep, 2007
Downloads: 1121

Rating

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Solutions

Solution by andrewl.us, published 17. mar, 2010; download (478 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 28. Sep 2007	lol, text in serial box are a valid serial =) that's a help? :)
IMPosTOR 28. Sep 2007	algorithm detective md5 sha-1 rijndael :-?
MR.HAANDI Author 28. Sep 2007	"text in serial box are a valid serial =)" yes, that is one of some points I built in as help. Still the serial is also there to confuse ;) "algorithm detective" md5,sha-1,rijndael what "algorithm detective" do you use? PEiD only shows MD5, which is correct. btw, partially this crackme is based on that: http://uncyclopedia.org/wiki/MD5
human_thought 30. Sep 2007	i hate to say that but you can't really expect someone to really get a grip on your crackme with such long validation routine,unless you're a very well-known scene reverser :p And if you have used a proven math algo that simply cannot be reversed,what's the point in analysing this one?
lilcw 30. Sep 2007	md5 can be reversed but for sure you wont get valid text
MR.HAANDI Author 30. Sep 2007	@human_thought: well, firstly, the validation routine is long, but you soon will notice recurrent structures and label them appropriately. secondly, it is based on a math problem, that if you create a valid solver can be solved in less than 20 seconds. thirdly, it is level 8 - nobody should expect a piece of cake, but if you knew the real checking equation you would laugh ;)
sd333221 30. Sep 2007	Wow, the algo is so huge! Mr.Haandi you got the longest d... :-)
MR.HAANDI Author 01. Oct 2007	@sd333221: I do not exactly know what you intention is by asserting this, but I shall take this as a compliment for my coding effort.
Shism 02. Oct 2007	hes just making fun of you...
human_thought 03. Oct 2007	btw a real difficult crackme's validation routine is pretty small most times :p
Shism 04. Oct 2007	Mr.Haandi is very knowledgeable and I respect his work. A small or long routine this is a hard one...
sd333221 06. Oct 2007	"hes just making fun of you..." No that is not right. It's just that it is nearly impossible to gen this, if you have a real life, because it is very obfuscated, and it takes ages to deobfuscate that algorithm. In "real life" i would patch this, because it would fasten up the registration process
sd333221 06. Oct 2007	Furthermore the arithmetics Library you used makes it very hard to understand it, since you don't know what the calls do... You have to take a deep deep look if you want to solve it.
MR.HAANDI Author 07. Oct 2007	Well, the algorithm itself is not obfuscated and if you'd take a look at the sources - they are pure C++ and very clean. The only thing is: I use expressions like A=(B+C)*(D+E) with overloaded operators, that's why the necessary temporary values are created and copied automatically by the compiler. Additionaly, I've just built in some inline expansion structures, that's why the result appears longer than it is - you have to identify recurrent structures yourself (howev, if this one won't be solved for a longer time, I will remove the inline expansion thing). "Furthermore[,] the arithmetics Library" I use is a open source one, and if you know which compiler I use (it is obvious) you can generate files which identify all the instructions and label them for you; the rest is some math and I think one should have seen elliptic curve crypto in action in order to understand what is going on ;)
KoЯn Rulz 18. Dec 2007	i can patch it and make it self generate but i have not been able to find a valid code
Shism 19. Dec 2007	Where's jb, when you need him to solve something !?
divinomas 15. May 2008	"Intersection" ,as a wired name for a crackme,contains the solution for itself.I think it would be easier to figure out the weakness after knowing which coordinate system for elliptic curve used in this crackme.If I had time I would write a keygen and tutorial,but I think the title itself is sufficient for some smart guys to make it yourself.
alex_ls 18. Mar 2010	It's a very impressive work, andrewl.us. Don't even imagine how you could do this! It's time to learn mathematics :)
andrewl.us Moderator 18. Mar 2010	thanks, but anyone can do it just start at http://www.certicom.com/index.php/ecc-tutorial probably best entry ECC crackme is happytown#26 it's so easy to feel hopeless with all the info out there, but you need an understanding of only a tiny fraction of it (mainly the group behavior) to own up some crackmes

MR.HAANDI's Short Sign

Download short_sign_keygenme.zip, 895 kb (password: crackmes.de)
Browse contents of short_sign_keygenme.zip

My most complex work till now,
don't even bother to try if you aren't a crypto geek ;)

More info inside the readme.

Difficulty: 9 - You can't solve this yourself :)
Platform: Windows
Language: C/C++

Published: 15. Jan, 2009
Downloads: 1526

Rating

Votes: 9
Crackme is awesome.

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Solutions

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Discussion and comments

divinomas 02. Mar 2009	Short sign crackme is a theoretical crackable crackme, based on prevalent paring based cryptograph schema. But considering the big Elliptic curve (110bits), it is far more practical to obtain the private key compared to ECC109 challenge on certicom (detail: http://arstechnica.com/old/content/2002/10/1088.ars). Moreover, the curve is non-singular and not anomalous, so polynomial-time or subpolynomial algorithm won't work here. On the other hand, Short sign generates private key from MD5 hash and seemingly the private key is not close to 0 or the group order.Anyway, although I can't get the private key individually, I did learn a lot from the procedure to understand the deep concept concerning elliptic cure.
ksc91u 10. Mar 2009	I know solving large ECC is difficult. But I do not understand, pDriLl's Crypto Keygenme also make use of ECC, from the solution I see his P is like more than 88 bits. Why it is still cracked?
MR.HAANDI Author 10. Mar 2009	Dealing with ecdlp it depends on the largest factor of the order (pohlig-hellman algorithm), which is small in that keygenme. Additionally, current ecdlp solvers can do tasks even with 90bit prime order in some weeks with recent cpus.
ksc91u 11. Mar 2009	EC domain parameters:(p,a,b,G,n) P=k*G How about finding P if we know k, and (p,a,b). Is this as difficult as ECDLP?
MR.HAANDI Author 11. Mar 2009	No, this is a plain EC multiplication for which polynomial time algorithms exist. In this equation only to find k (P,G given) would be difficult. Even to find P in G=k*P (G,k given) wouldn't be hard.
ksc91u 11. Mar 2009	G=kP (G,k given) is easy because you know the size of field, right? Size=U P=(U-k)G. What if you don't know U,G ? Many thanks for answering.
MR.HAANDI Author 11. Mar 2009	Firstly, it is not (U-k) but (k^(-1) in the finite field created modulo U). If you do not know U, you have an unknown group structure (the same idea as behind RSA). Here the difficulty is still less than ecdlp. However, it is very challenging to write an own algorithm, which is significantly faster than the one, which solves the ecdlp.
ksc91u 11. Mar 2009	Yes, I agree (k^(-1)). Maybe I was not clear. My U is the number of total points. As in http://www.ellipsa.net/public/ecb/ecb.html this software, right? Why it is simpler than ecdlp? And would you tell me the size of prime in pDriLl's Crypto Keygenme?
SpiderZ 04. Nov 2009	does patching is allowed or any other solution?
Unknown Coder 22. Dec 2013	Succes Data matches the given signature. I did it ?

MR.HAANDI's SolveIt #1

Download SolveIt#1.zip, 32 kb (password: crackmes.de)
Browse contents of SolveIt#1.zip

Your task today is: Get the Good Boy for your name!
To patch or to bruteforce is forbidden, though.
Tbh, I kinda don't assume to see this piece of work
solved like many hard crackmes on crackmes.de,
but maybe the community is stronger than I suppose.

For more info look inside the archive ;)

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: C/C++

Published: 29. Jul, 2007
Downloads: 702

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Solutions

Solution by KernelJ, published 15. aug, 2007; download (49 kb), password: crackmes.de or browse.

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Discussion and comments

Waryas 02. Aug 2007	is the message You mastered it! ? 0040F490 59 6F 75 20 6D 61 73 74 You mast 0040F498 65 72 65 64 20 69 74 21 ered it!
MR.HAANDI Author 02. Aug 2007	Yes you speak the truth, now go, go and create a keygen, which shall show the people irreproachable serials for any names they desire, so the keygenme will not hold back that message from the people! "A journey of 1000 miles begins with a single step."
jB_ 03. Aug 2007	MR.HAANDI: Good crackme, but it is not as hard as you may think. I guess several people here are able to solve it in no more than a couple of hours.
KernelJ 12. Aug 2007	£1000000 prize for the first person to post a valid signature for the 6 character string '!/1cq1'
jB_ 14. Aug 2007	856C9729-1A6567AD-9B5588CD-A36DF84C Do I win 3/4 of the prize? I guess no...

MR.HAANDI's Spvm

Download spvm_keygenme.zip, 6 kb (password: crackmes.de)
Browse contents of spvm_keygenme.zip

One page of clean code, no obfuscation, just basic math.
Your task is to find one of the valid serials for the given user id.

My favourite serial for this target has 18 chars ;)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: .NET

Published: 21. Sep, 2008
Downloads: 560

Rating

Votes: 4
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Solutions

Solution by divinomas, published 27. sep, 2008; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

MR.HAANDI Author 23. Sep 2008	Opcode 7 exploit found by KernelJ and divinomas. Please get the updated code to continue.
divinomas 26. Sep 2008	Hi. I didn't get your real intention.Anyway,I have forgotten differential equation for a while.Mapple gave me the result -tanh(ln(x)+_C1) for your "diff(y(x), x) = (y(x)^2-1)/x" equation. PS:You are a school boy,do you?So many formulas ;) Regards
MR.HAANDI Author 26. Sep 2008	Yes, to solve it you have to 1. Understand the basic VM. (shouldn't be challenging) 2. Get the function. (60% af the task) 3. Transform the function into VM code. (30%, here you have to use a few tricks) I just want ppl to use their braincells and maybe learn a little. And in five days I won't be a school boy anymore ;)
Ox87k 28. Sep 2008	@MR.HAANDI: I want to thanks you for your awesome ideas about these crackmes and thanks moreover for this one. @divinomas: Your solution is perfect, clear and exhaustive. Thanks you for it, i learnt something more with it. Congratulations both of you guys, i hope to see more like this one.
artif 28. Sep 2008	very nice to see such crackmes ... it's original thanks you !!! btw congratz to divinomas ...
indomit 29. Sep 2008	Congratulation divinomas! You were too fast for me :) In any case, your solution is better than it would be my. =) But I found a shorter serial. It has 16 chars (8 commands) =) MR.HAANDI, can I show it here?

MR.HAANDI's Spvm 2

Download spvm_2_keygenme.zip, 6 kb (password: crackmes.de)
Browse contents of spvm_2_keygenme.zip

Like the first Spvm keygenme: clean code, some math.
The task is to find a valid serial for the given user id.

The mathematic problem is a different one. Have fun ;)

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: .NET

Published: 04. Oct, 2008
Downloads: 614

Rating

Votes: 3
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Solutions

Solution by divinomas, published 24. oct, 2008; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

andrewl.us Moderator 04. Oct 2008	Who said you could give up on SDDecoder and make cool crackmes instead? :>
divinomas 22. Oct 2008	So how about spvm 2,i guess it is something about integration ;)
indomit 23. Oct 2008	I tried this one. Found integral as $[0,x] exp(10000pipixdx)f(x)dx = pi/(1-dxdx*big_number) Not sure this right, but any case it is to hard for me to found function f(x) :(
divinomas 23. Oct 2008	@indomit:Here is some interesting tricks.dx has two roles,one acts like a infinitesimal,another as a constant.Take the exponent (10000pipixdx)=-s to get dx=fun(s) then substitute the dx in the right,you can get the laplace transformed F(s) just use reversed laplace transformation to get f
divinomas 23. Oct 2008	sorry it should be (10000pipi*dx)=-s
indomit 24. Oct 2008	divinomas, thank you very much! I found this damn function! It was so easy after your advice. =)
indomit 24. Oct 2008	And found signature now! It was nice :) P.S. I think divinomas has already sent the solution, or soon will do this, so I didn't make sense :)
Ox87k 24. Oct 2008	two solutions are better than one so indomit, please, write you own..

MR.HAANDI's Substitutions

Download Substitutions_Keygenme_by_MR.HAANDI.zip, 92 kb (password: crackmes.de)
Browse contents of Substitutions_Keygenme_by_MR.HAANDI.zip

This is a simple keygenme with some substitutions.
It wants to trick you into telling something about yourself.

It is very simple to find (name,serial) pairs, but believe me,
it is a little tricky to write your own proper keygen.

More info inside the readme.

So don't get tricked and have fun ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 25. Feb, 2013
Downloads: 267

Rating

Votes: 5
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Solutions

Solution by s3Rious, published 10. oct, 2013; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

idid231 21. Feb 2013	It doesn't run on my SP2, keep telling me that it's not a valid win32 app.
MR.HAANDI Author 21. Feb 2013	This is strange. There are no anti* mechanisms involved, and I used my old template, which worked fine in the past. The only thing changed is the compiler, which is VS2012 now. Does anyone else have this problem or knows how to fix it?
hepL3r 21. Feb 2013	yeah,it doesn't work in my XPSP3 :\|
MR.HAANDI Author 21. Feb 2013	Wow, "VC++ 2012 RTM does not support WinXP". I'm sorry for the inconvenience. I will recompile and verify a new version asap.
tamaroth Moderator 21. Feb 2013	A good question would be: why are you lads still using WinXP?
hepL3r 25. Feb 2013	@tamaroth: I'm using win8 but winxp is still the best os for anti-anti-debugging and ofc reversing :p
redoC 25. Feb 2013	what version of crypto++ is used?
tamaroth Moderator 25. Feb 2013	The version of crypto++ used was 5.6.1, crackme is using only simple functions that can easily be blackboxed (I wasn't able to procure signatures for that library, something about visual studio compiling to eCOFF which is not supported by flirt)
idid231 03. Mar 2013	hmm, as i see this kgm uses some tables to take value from, i don't know why you guys talked about crypto, may be i was tricked :D
MR.HAANDI Author 03. Mar 2013	This is just difficulty 2, so there is no crypto inside. The library crypto++ was used for convenience and you can solve everything with "a little brain (or luck)" without even looking into that library. Still, if you take the most simple way, you get tricked. To achieve the "Gold" bonus objective a little algebra (group homomorphism) is required and you may find an easteregg.
redoC 17. Mar 2013	Too easy, no need to reverse anything. Two small static init fields and everything is in sub_401165. Anyone found eastereggs?
idid231 20. Mar 2013	As the author noted "if you take the most simple way, you get tricked" i don't know where to go but the simple way :P so i gave up :D
redoC 27. Mar 2013	I dont now where's the trick but here is functional keygen: BYTE initTable_byte_438C50[0x100] = { 0xB9,0xFE,0xCE,0x7F,0x18,0x0A,0x16,0xA0,0x52,0x2F,0x8C,0x67, 0xE3,0xF5,0x1D,0x3D,0x37,0xA1,0x1F,0x33,0xDD,0x39,0xC9,0x5B, 0x26,0x0D,0x82,0x94,0x68,0x01,0x81,0x00,0x20,0xE9,0xFB,0x4C, 0xB0,0xAB,0xFD,0xD1,0xFA,0xED,0x73,0x77,0x55,0x44,0xA4,0x07, 0x99,0xF4,0xC8,0x4A,0xBC,0x1B,0x62,0x5F,0x2C,0xA6,0xAA,0xF3, 0x80,0x9B,0x09,0x3F,0x50,0x41,0xA7,0x7D,0x3B,0x21,0x0C,0x10, 0x34,0x43,0xD2,0x15,0x9D,0xBD,0x59,0x45,0x53,0x46,0xF6,0x4E, 0x9F,0x31,0x57,0x49,0xBB,0xCD,0x28,0xBA,0xA2,0x42,0xCB,0x2B, 0x56,0x5E,0x3C,0x63,0x64,0x65,0xB2,0x12,0xD0,0x69,0x5D,0x6B, 0x4D,0xE6,0x54,0x6F,0xAD,0xC3,0x72,0xD8,0x74,0x75,0x22,0x5A, 0x61,0x79,0x6A,0x96,0x48,0xAE,0x90,0x88,0x8D,0xB5,0x0E,0xF9, 0x25,0xA3,0x95,0x7B,0xB7,0x8E,0xAC,0xB4,0x51,0x4B,0xBE,0x27, 0xEA,0x35,0x9C,0xE0,0x83,0xAF,0x6D,0x60,0x2D,0x14,0x8B,0x4F, 0x66,0x05,0xC1,0x3E,0xDE,0xA5,0x91,0x03,0x9E,0xE5,0x8F,0xD6, 0xF2,0xC7,0x2A,0x71,0xB8,0xFF,0xD4,0xA9,0xF0,0x7E,0xC5,0x9A, 0xE1,0xB6,0x19,0xEE,0x7C,0x98,0xDF,0x89,0x17,0xEC,0x7A,0x08, 0x24,0x40,0x87,0x5C,0x78,0xBF,0x06,0xDB,0xF7,0x85,0xCC,0x13, 0xE8,0x76,0x04,0x92,0xD9,0xCA,0x11,0x58,0x02,0xD7,0x1E,0x3A, 0x0F,0xE4,0x47,0xD5,0x1C,0xF1,0x38,0xC6,0xE2,0x29,0x70,0xD3, 0x1A,0xA8,0xEF,0x36,0xC4,0x0B,0x6E,0xFC,0x8A,0xC2,0x97,0x6C, 0xB3,0xCF,0xEB,0x32,0xC0,0xDC,0x23,0xB1,0xF8,0x86,0x30,0x93, 0xDA,0x84,0xE7,0x2E }; BYTE initTable_byte_458D68[0x100] = { 0x1F,0x1D,0xD4,0xA3,0xCE,0x9D,0xC6,0x2F,0xBF,0x3E,0x05,0xE9, 0x46,0x19,0x82,0xD8,0x47,0xD2,0x67,0xCB,0x99,0x4B,0x06,0xBC, 0x04,0xB6,0xE4,0x35,0xDC,0x0E,0xD6,0x12,0x20,0x45,0x76,0xF6, 0xC0,0x84,0x18,0x8F,0x5A,0xE1,0xAA,0x5F,0x38,0x98,0xFF,0x09, 0xFA,0x55,0xF3,0x13,0x48,0x91,0xE7,0x10,0xDE,0x15,0xD7,0x44, 0x62,0x0F,0x9F,0x3F,0xC1,0x41,0x5D,0x49,0x2D,0x4F,0x51,0xDA, 0x7C,0x57,0x33,0x8D,0x23,0x6C,0x53,0x9B,0x40,0x8C,0x08,0x50, 0x6E,0x2C,0x60,0x56,0xD3,0x4E,0x77,0x17,0xC3,0x6A,0x61,0x37, 0x97,0x78,0x36,0x63,0x64,0x65,0x9C,0x0B,0x1C,0x69,0x7A,0x6B, 0xEF,0x96,0xEA,0x6F,0xE2,0xAB,0x72,0x2A,0x74,0x75,0xCD,0x2B, 0xC4,0x79,0xBE,0x87,0xB8,0x43,0xB1,0x03,0x3C,0x1E,0x1A,0x94, 0xFD,0xC9,0xF9,0xC2,0x7F,0xBB,0xEC,0x9A,0x0A,0x80,0x89,0xA6, 0x7E,0xA2,0xCF,0xFB,0x1B,0x86,0x7B,0xEE,0xB9,0x30,0xB3,0x3D, 0x92,0x4C,0xA4,0x54,0x07,0x11,0x5C,0x85,0x2E,0xA1,0x39,0x42, 0xE5,0xAF,0x3A,0x25,0x8A,0x70,0x7D,0x95,0x24,0xF7,0x66,0xF0, 0x8B,0x81,0xB5,0x88,0xAC,0x00,0x5B,0x58,0x34,0x4D,0x8E,0xC5, 0xF4,0x9E,0xED,0x71,0xE8,0xB2,0xDF,0xA9,0x32,0x16,0xD1,0x5E, 0xCA,0x59,0x02,0xF1,0x68,0x27,0x4A,0xE3,0xAE,0xDB,0xA7,0xD5, 0x73,0xD0,0xFC,0xC7,0xF5,0x14,0xA0,0xBA,0x93,0xB4,0xE0,0x0C, 0xD9,0xA5,0x6D,0xFE,0xCC,0x21,0x90,0xF2,0xBD,0x29,0xB7,0xE6, 0xB0,0xDD,0xA8,0x3B,0x31,0x0D,0x52,0xC8,0xF8,0x83,0x28,0x22, 0xEB,0x26,0x01,0xAD }; BYTE byte_448D58[0x10000]; BYTE byte_438D58[0x10000]; BYTE byte_458D58[0x10]; BYTE byte_438D54[4]; //---------------------------------------- bool Button_ACTION_401165 (HWND hDlg) { int i,j,idxHi_v2,idxLo_v4,intLen,v10,v12,v13,v14,v15,v16,v17,v23,v26; char szName[128] = {0}; char szRequiredSerial_v22[16]; memcpy (byte_458D58, "Are you tricked?", 0x10); memcpy (byte_438D54, "YES!", 4); for (i=0; i<256 ;i++) { idxHi_v2 = initTable_byte_438C50[i] << 8; for (j=0; j<256 ;j++) { idxLo_v4 = initTable_byte_438C50[j]; byte_448D58 [idxLo_v4 + idxHi_v2] = initTable_byte_438C50 [i ^ j]; byte_438D58 [idxLo_v4 + idxHi_v2] = initTable_byte_438C50 [(i+j) & 0xFF]; } } GetDlgItemTextA (hDlg, IDC_EDIT_NAME, szName, 127); // input name intLen = strlen(szName); if (intLen < 2) return false; v26 = 0; for (i=0; i<intLen; i++) v26 = szName[i] + 16 * v26; for (i=0; i<4; i++) { v10 = ((BYTE)&v26 + i); ((BYTE)&v26 + i) = initTable_byte_438C50[v10]; } v14 = v26 & 0xFF; v12 = (v26 >> 8) & 0xFF; v13 = (v26 >> 16) & 0xFF; v23 = (v26 >> 24) & 0xFF; for (i=0; i<4; i++) { v15 = (BYTE)(&byte_438D58[256 byte_458D58[4i + 2]] + v13); v16 = (BYTE)(&byte_448D58[256 * (BYTE)(&byte_448D58[256 (BYTE)(&byte_448D58[256 (BYTE)(&byte_438D58[256 byte_458D58[4 * i]] + v14)] + (BYTE)(&byte_438D58[256 byte_458D58[4i + 1]] + v12))] + v15)] + (BYTE)(&byte_438D58[256 * byte_458D58[4i + 3]] + v23)); v17 = byte_438D54[i]; ((BYTE)&v26 + i) = initTable_byte_458D68[(BYTE)(&byte_448D58[256 * v16] + v17)]; } wsprintf (szRequiredSerial_v22, "%02X-%02X-%02X-%02X", v26&0xFF, (v26>>8)&0xFF, (v26>>16)&0xFF, (v26>>24)&0xFF); SetDlgItemText (hDlg, IDC_EDIT_SERIAL, szRequiredSerial_v22); // final serial return true; }
MR.HAANDI Author 27. Mar 2013	~ As the readme fortold ~ you were "tricked" into telling too much about yourself. I did not access any sensible information (like passwords), but your keygen tells me, that you are using an AMD CPU on a Windows 7 build 7600. Also in your keygen is an encrypted string "This is your private data! If you share it, then you are tricked!". Obviously initTable_byte_438C50 and initTable_byte_458D68 are to blame. However other reversers will have different bytes in those fields, but all keygens will fork fine everywhere. Sharing this "private data" is not really necessary for a functioning keygen and giving it away is in general not a good idea.
halsten 21. Jul 2013	Okay. Indeed very interesting crackme from MR.HAADNI as usual. I got the idea of "telling too much about yourself" and the "nope" part. In a real world scenario, redoC solution would be accepted, but according to the rules, I agree it doesn't meet the rules.
andrewl.us Moderator 09. Oct 2013	another good solution by serious final approval, haandi?
MR.HAANDI Author 09. Oct 2013	@andrewl.us: It is a very solid solution and definitely achieves the "Silver" goal, which I'm glad to see. Still the author fails to go the last step and ~really~ reverse engineer what happens right before his eyes in his own keygen. If you'd look at my keygen, you'd say it is a 20 line level 1 keygen :)
s3Rious 10. Oct 2013	I achieved Golden goal only by looking my keygen. Solution was in front of my eyes :). Thanks to MR.HAANDI for his hint and for his very interesting crackme. I will fix my solution as soon as possible.
andrewl.us Moderator 10. Oct 2013	s3Rious shrinks his keygen by 90% and wins gold medal!
MR.HAANDI Author 10. Oct 2013	Finally, someone who knows when to say "NOPE". The solution is perfect and easily achieves the golden goal. It was interesting to see, how with time the layers were broken step by step: bronze, silver, gold.

MR.HAANDI's Thales 3 keygenme

Download thales3_keygenme.zip, 11 kb (password: crackmes.de)
Browse contents of thales3_keygenme.zip

Based on BUBlic's Thales keygenmes, but stronger ;)
I used .NET without obfuscation to, so you will have the source.
The main task is to understand what it really does and to keygen it elegantly, that's why I'm saving your time by using .NET.

Maybe I'll think of a fourth dimension (time) for the next Thales task.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: .NET

Published: 18. Jan, 2008
Downloads: 611

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Solutions

Solution by indomit, published 19. sep, 2008; download (46 kb), password: crackmes.de or browse.

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Discussion and comments

costy 24. Jul 2008	If you made it in asm it would be impossible to solve!
Ox87k 19. Sep 2008	Good job indomit! :) Thanks for your solution!
obnoxious 19. Sep 2008	man awesome solution, indomit!!!!!!!!!!!!!
indomit 19. Sep 2008	Ox87k, obnoxious, thank you :)
yomshleeshee 20. Sep 2008	Wow! Nice. Hmmm, any math/physics people in the house...
MR.HAANDI Author 20. Sep 2008	Well done, indomit! Best time for me to submit a new math riddle ;)

MR.HAANDI's WeakAES

Download weakaes_keygenme.zip, 9 kb (password: crackmes.de)
Browse contents of weakaes_keygenme.zip

This is a non-standard AES implementation containing an algorithmic backdoor. Spot it and use some math.

Do not get confused by some "hints" in the code.

The task is to write a proper key generator.

Have fun ;)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 04. Jul, 2012
Downloads: 229

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Votes: 4
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Solutions

Solution by Dcoder, published 17. jul, 2012; download (412 kb), password: crackmes.de or browse.

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Discussion and comments

MR.HAANDI Author 17. Jul 2012	Nice solution Dcoder, that is exactly how I intended this to be solved. However, there is a backdoor to the backdoor. As soon as you know that the function is linear i.e. y = Ax + Bk + c (y: cipher, x: plain, k: key) you can just sample it with unit vectors and 0, invert B and you're done.

MR.HAANDI's WeakAES 2

Download weakaes2_keygenme.zip, 8 kb (password: crackmes.de)
Browse contents of weakaes2_keygenme.zip

This is a non-standard AES implementation containing an algorithmic backdoor. Spot it and use some math.

Things get non-linear this time.

The task is to write a proper key generator.

Have fun ;)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: .NET

Published: 12. Nov, 2013
Downloads: 209

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Solutions

Solution by Dcoder, published 21. nov, 2013; download (304 kb), password: crackmes.de or browse.

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Discussion and comments

MR.HAANDI
Author
21. Nov 2013

@Dcoder: Nice solution. You weren't tricked by the "non-linearity" and have chosen the fastest of the "multiple ways to generate valid signatures".
I would have preferred to see a slow solution, which treats the SBox as a non-linear transformation and uses the chinese remainder theorem,
but you did not give other students any chance :)
Still, maybe someone else wants to document the non-linear way in their own solution. The keygenme is built in a way that it is perfectly possible.

tamaroth
Moderator
22. Nov 2013

I'll give it a shot at some point. But first I need to understand how exactly AES works :)

MR.HAANDI's WeakDSA

Download weakdsa_keygenme.zip, 8 kb (password: crackmes.de)
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This is a non-standard DSA implementation containing a very specific weakness. Spot it and use some math.

The task is to generate valid (id, fingerprint, signature) triples without the private key.

You will need two cryptographic "techniques" to be successful.
Have fun ;)

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: .NET

Published: 16. Jun, 2012
Downloads: 319

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by pk__, published 26. jun, 2012; download (24 kb), password: crackmes.de or browse.

pk__ has rated this crackme as quite nice.

Solution by Dcoder, published 25. jun, 2012; download (1301 kb), password: crackmes.de or browse.

Dcoder has rated this crackme as quite nice.

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Discussion and comments

pk__ 19. Jun 2012	id: 175001982597854 fp: KZgBH4kwVK34U5lhPyZ+R1814RomwY1c4x6pfG8oNVjWl2c8wM3t3VnorR/aoFeGhPa74R6294AURw== sig: KZgBH4kwVK34U5lhPyZ+R1814RomwY1c4x6pfG8oNVjWl2c8wM3t3VnorR/aoFeGhPa74R6294AUR8mF y8aLK7kBBtE9ys19mfb/Z3fekWi2/2z9xcIadi7RXrLZBRjrYKesSVdOBgwmClk+RlxXnVUYIadT6N5u IXJcl7ZtURs=
pk__ 26. Jun 2012	My solution was based on the birthday paradox. The expected number of iterations with that method is ~2^24 (not counting precalc, which is also 2^24).
andrewl.us Moderator 27. Jun 2012	cool work guys
kilobyte.asm 27. Jun 2012	umm hold on wait, there's no tutorial in pk__'s solution?
pk__ 28. Jun 2012	@kilobyte: sorry, forgot to add it. the problem in crackme is: H(x) - 6 topmost bytes of md5(x) \|\| - concatenation id - id fp - fingerprint serial - encoded pair (r,s) for DSA h = H(id)\|\|fp dsa equation checked by the crackme: w = s^-1 mod q v = g^hw * y^rw mod p mod q r == v If we can control "h", then it's easy to generate a valid sig: r = (yg)^k = g^xk+k (k random) w = r^-1 k h = r indeed: y^rw = g^xrw = g^xk, since rw = rr^-1k = k g^hw = g^k, since hw=rw=k so: g^hw * y^rw = g^k*g^xk = g^xk+k and this is equal to r. the problem is we can't "easily" control whole hash, since 6 bytes of it come from md5(id). we need to find a collision, by generating random r=g^k and random id and checking if 6 topmost bytes of md5(id) match 6 topmost bytes of "r". If so, we set the fingerprint to fill the rest of h, so that H(id)\|\|fp == r. By birthday paradox, we expect to find a collision after ~sqrt(2^48) = 2^24 iterations.
kilobyte.asm 30. Jun 2012	cheers mate. Hopefully sometime in the near future I'll be able to understand all of that :P

Mr. eXoDia's KeygenMe #1 TPoDT.tk

Download KeygenMe#1.zip, 24 kb (password: crackmes.de)
Browse contents of KeygenMe#1.zip

KeygenMe #1 T.P.o.D.T:

Created by:
Mr. eXoDia // T.P.o.D.T 2010
mr.exodia@tpodt.tk
http://www.tpodt.tk

Level: ??? I wanted to make an easy KeygenMe but It's almost impossible to fish for me :)
5/10???

Rules:

Newbie: Patch this one and send me a tutorial how you did that
Advanced: Make a keygen for me (I like c++) and upload a tutorial + your source

Info:

Take a look @ http://www.tpodt.tk for tutorials (Unpacking)

Comming soon:

OdbgScript, an intoduction (#1 of a comming serie)

Mr. eXoDia // T.P.o.D.T 2010
http://www.tpodt.tk

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 27. Dec, 2010
Downloads: 519

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by kmkz, published 03. feb, 2011; download (115 kb), password: crackmes.de or browse.

kmkz has rated this crackme as nothing special.

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Discussion and comments

marac112 27. Dec 2010	1 byte patched but I cant understand algo its from microsoft library right?
Mr. eXoDia Author 30. Dec 2010	no it's not from the Microsoft library... a (very) small hint: you canNOT fish this keygenme...
Mr. eXoDia Author 02. Jan 2011	No solutions yet...is this too hard?? Mr. eXoDia // T.P.o.D.T 2011 http://www.tpodt.tk
Mr. eXoDia Author 08. Jan 2011	nice idid231, but can't you submit a solution how you retrieved it? only a serial isnt really usefull to newbies who want to learn something. Mr. eXoDia http://www.tpodt.tk
eXidis 18. Jan 2011	I sent you an e-mail eXodia with a couple questions
hacker2010 19. Jan 2011	The Given sols is about patching.....but I want the keygen sols. btw I am newbie.... plz upload some keygening sols..
eXidis 19. Jan 2011	It takes the serial you input, runs it through an algo, and what is generated by the algorithm has to be equal to the name you inputted. However, I am still missing something because the result just keeps getting erased and I cannot figure out why. I found where it erases the memory and there is a jump there but I cannot figure out how to make the condition correct. Have spent hours on it lol....
idid231 20. Jan 2011	Hi there, i don't know how to keygen it, because it use Base64, if keygen, the code only as this: Base64(name). If write again algorithm of base64, will it call is solution? I don't think so.
Mr. eXoDia Author 23. Jan 2011	to: idid123, Finding a lib on base64 is not hard. But maybe a small txt about how you find out that it was base64?? Mr . eXoDia to: hacker2010, No problem about the solution. If it helps newbies it is always nice to contibute something
idid231 24. Jan 2011	Scan by Peid, i saw it, no more. You hide it, aren't you?
Mr. eXoDia Author 27. Jan 2011	no, im not hidining anything. my Kanal still detects base64 Mr. eXoDia // T.P.o.D.T 2011 http://www.tpodt.tk
idid231 28. Jan 2011	Yes, base64 is solution, if i were you, i would reverse name before use base64 :D Thank for this crackme :)

mre521's KeygenMe #1

Download keygenME-n1.gz, 3 kb

Hey this is my first keygenme, but don't expect it to be too easy. The program asks for a name and serial/key. Write a valid key for your name and/or upload a solution. Hint: you will NOT be able to fish a serial, sorry!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 21. Dec, 2010
Downloads: 422

Rating

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Solutions

Solution by acruel, published 23. sep, 2015; download (1 kb), password: crackmes.de or browse.

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Solution by tvk6843, published 10. dec, 2014; download (4 kb), password: crackmes.de or browse.

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Solution by Yoha, published 14. feb, 2013; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

mre521 Author 21. Dec 2010	I realized after opening the binary in IDA that the names of my functions may have some how been kept. Can anyone confirm this?
tamaroth Moderator 21. Dec 2010	Yep, they did, prolly linked with debugging symbols ;-)
mre521 Author 21. Dec 2010	well all the easier to solve then
stefanie 22. Dec 2010	'strip' -ping it would have done the trick. thanks for the upload, haven't seen a nix crackme for a while now. and just in time for christmas too.
promix17 17. Feb 2012	It's seems to be buffer overflow)))
stfsux 23. Jan 2013	I found a valid serial, ill write a keygen. It was quite nice for your first keygen btw.
tvk6843 27. Nov 2014	Thanks for the exercise! I got fun with assembly computations. They seem quite complex in assembly while they are not in paper :-)
acruel 04. Sep 2015	Submitted a solution. I hope you'll like it ;)

mre521's KeyGenMe if You can

Download keygenme.zip, 19 kb (password: crackmes.de)
Browse contents of keygenme.zip

===KeyGenMe if You can!===

Try and get a valid key for the program.

You will not be able to self-keygen this one
or fish a serial out.

A valid solution entails a keygen, but post your
valid keys in the comments if too lazy to make one.

I can provide the source code to those who have posted
a solution but don't spread it around. Message
me if you want it.

-- mre521

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 07. Jul, 2014
Downloads: 754

Rating

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Solutions

Solution by bottonim, published 26. aug, 2015; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

Oxiangel 29. Jun 2014	Acabo de Crackear este archivo :D
mre521 Author 06. Jul 2014	If you cracked it then write a solution for it.
morecode 07. Jul 2014	But write the tutorial in english. That will help. Pero escribe el tutorial en inglés. Eso ayuda a compartirlo.
Rad01 01. Aug 2014	it is difficult
mre521 Author 19. Aug 2014	Here is a teaser key that works. Name: mre521 Key: C4E5RM3UI4 I suppose this challenge is not quite what it seems to be. Hint: The significance of the music in the program is greater than you probably think.
b3nder 25. Aug 2014	Name: b3nder Key: 75IHOLPDA5 good crackme, music is awesome :)
AntonDevil 29. Aug 2014	That was insane =). Sent keygen source to your mail. It's well commented and contains one interesting question about key validation routine. Name: AntonDevil Key: NS4V98AI00 And yea, music as awesome. Good old times =)
mre521 Author 10. Sep 2014	Anyone want to submit a Solution? I know multiple people have figured it out.
bottonim 24. Aug 2015	Name: bottonim Key: 7S33PR1EJ3 Great crackme! thamk you very much
ayberkeser 28. Aug 2015	İ change je command to jnz and it work awesome :D

mre521's Mre521 KeyGenMe #2

Download keygenme#2.zip, 162 kb (password: crackmes.de)
Browse contents of keygenme#2.zip

Hey this is my second KeyGenMe, first for windows, and I hope someone is able to solve it.

Rules:
- No patching
- No self-keygenning (like you can anyway)

Valid Solutions:
- Keygen (obviously)
- Serial for some name, such as your own

Hints:
- You will not be able to fish a serial

Also, there is a bonus. If you are able to get a correct serial for the name "crackmes.de", then you will gain access to the source code.

Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 21. Dec, 2010
Downloads: 391

Rating

Votes: 4
Crackme is boring.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to MrGneissGuy »

View profile of MrGneissGuy »

Discussion and comments

3ton 21. Dec 2010	Name:-=3ton=- Serial:MRE-90EF3510-A10F16-40E8-521
mre521 Author 21. Dec 2010	nice, but can you make a keygen?
hasherezade 21. Dec 2010	easy :) name: hasherezade serial: MRE-06B90E46-4F3D4B-3FBB-521
draww 21. Dec 2010	name: draww serial: MRE-A708D5F7-BCF3F1-D7B2-521
slash3r 22. Dec 2010	name: slash serial: MRE-E0AF7150-675056-462B-521
Zephy 26. Dec 2010	Name: zephy Serial: MRE-01FE2201-600007-2AFA-521 Nice, thx.
TripleTordo 04. Jan 2011	Name : TripleTordo Serial : MRE-7E01B9FE-0FF6F2-931B-521 nice crackme
Klaria 05. Jan 2011	Very Good Crackme, Thank you
redoC 04. Mar 2012	Name: redoC Serial: MRE-83AC4D53-885051-BBCE-521 Password for archive is 0xDDC17063 ... includes KeyGen source codes.

MrGneissGuy's Plz KeyGen ME!

Download Release.zip, 5 kb (password: crackmes.de)
Browse contents of Release.zip

The usual...

No Patching.
No Brute Forcing.

Write a keygen and a tut.

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 17. Apr, 2009
Downloads: 345

Rating

Votes: 4
Crackme is boring crap.

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Solutions

Solution by obnoxious, published 20. apr, 2009; download (18 kb), password: crackmes.de or browse.

obnoxious has rated this crackme as boring crap.

Send a message to m@rio_crk »

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Discussion and comments

indomit 17. Apr 2009	I think, it uses very weak encoding. We can make one-char serial which will be right for many names. Example: name: ??H?H?H* (?-any char, *-empty, or any chars) serial: R
MrGneissGuy Author 17. Apr 2009	Understood. I started working on an upgrade for this one which uses the same principal. I'll upload it in a few days.
obnoxious 18. Apr 2009	aaargh!!!! i am wasting my time generating multiple untypeable serials for each name :D
obnoxious 19. Apr 2009	BTW indomit who has a name like "??H?H?H*" :)
T.0.R.N.A.D.0. 19. Apr 2009	A name like HAHAHAHA ?!
obnoxious 19. Apr 2009	gud one tornado........

m@rio_crk's CrackMe_4'o_by_m@rio

Download crackme4o_by_mrio.zip, 15 kb (password: crackmes.de)
Browse contents of crackme4o_by_mrio.zip

yyyy... strange protection...:) that's all

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 20. Apr, 2003
Downloads: 1402

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

Shism 11. Apr 2007	is it supposed to crash?
jB_ 12. Apr 2007	You have to patch the 2 anti-debug at the original entry point once you have unpacked the crackme. They crash under NT kernels.

m@rio_crk's Keygenme#1

Download keygenme#1.zip, 6 kb (password: crackmes.de)
Browse contents of keygenme#1.zip

Tested only on Winxp (sp2)
Coded with masm32

Task: keygen/solution

Enjoy!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 22. Jun, 2006
Downloads: 1207

Rating

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Solutions

Solution by BlÂµb, published 05. jul, 2006; download (16 kb), password: crackmes.de or browse.

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Ms-Rem's KeyGenMe by Ms-Rem

Download keygenme.zip, 20 kb (password: crackmes.de)
Browse contents of keygenme.zip

This keygenme use 8 commands VM for check serial.

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: Assembler

Published: 07. May, 2006
Downloads: 1283

Rating

Votes: 10
Crackme is quite nice.

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Solutions

Solution by simonzack, published 18. feb, 2009; download (70 kb), password: crackmes.de or browse.

simonzack has rated this crackme as nothing special.

Solution by MR.HAANDI, published 30. sep, 2007; download (517 kb), password: crackmes.de or browse.

MR.HAANDI has rated this crackme as quite nice.

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Discussion and comments

indomit 07. May 2006	VM-??? :) I tryed crack it... heh... I find the next: The text of messagebox depend on serial :/ If serial right then text of messagebox is generated as "Congratulations", else as "Not valid"... But the algo cycle is very very very long :) I don't understand it :)
Shism 08. May 2006	That's What Im talking about :) I like the first trick ;). Very clever ;) Yes The vm looks pretty complex to me...
fnkt 14. May 2006	nice keygenme! ep=0 is a nice trick and the vm looks nice. but why is it level 8? imho it is a lot easier. you can easily figure out the serial algorithm by setting some memory breakpoints and watching how the bytes change(only some additions & one substraction are used), this way you don't even need to disassemble the VM bytecode to understand it. anyway nice keygenme Ms-Rem!
Shism 15. May 2006	fnkt did you "crack it"?
Shism 16. May 2006	Are you gonna make a tutorial on how to keygen it? or Could you tell me how?
TQN 18. May 2006	How it can run with EP = 0 ? I don't know why ?
fnkt 18. May 2006	@TQN: sorry I meant AddressOfEntryPoint = 0, so EP = imagebase :/ 00400000 DEC EBP 00400001 POP EDX 00400002 MOV EAX,00405246 00400007 JMP EAX @Shism received my message?
Shism 18. May 2006	ya fnkt... Even though its pretty hard , I haven't really researched what you showed me.
halsten 19. Feb 2007	Hey all, I wonder about the trick of entry-point is 0, any ideas?
jB_ 19. Feb 2007	halsten: what is the problem? The entry point is zero, that's all. This is not common. Look at the disassembly: "MZ" can be interpreted as a code sequence, then the program will jump to the "real" entry point.
halsten 19. Feb 2007	jB: Thanks, I thought that it was abnormal to have an entry-point with a 0. I'll check it again.
jB_ 19. Feb 2007	Actually it is not normal, but there is no problem with that. Read fnkt's post. Execution starts from image base, but Ms-Rem made the necessary to jump to the real entry point just after.
halsten 19. Feb 2007	Problem is that I can't get it to disassemble the code, any ideas? Am I missing something that you've already pointed out? Thanks in advance.
zairon Moderator 19. Feb 2007	>I can't get it to disassemble the code What do you mean exactly?
halsten 19. Feb 2007	zairon: I can't seem to get a correct disassembly for the crackme even with IDA.
zairon Moderator 20. Feb 2007	Maybe you need to dump the running exe... ;)
halsten 20. Feb 2007	zairon: I've already done that, but still I get something weird.
zairon Moderator 21. Feb 2007	What exactly? Write down some examples.
simonzack Moderator 10. Feb 2009	brain fuck :p cool keygenme
MR.HAANDI 18. Feb 2009	I just read simonzack's last lines and I think I was misunderstood. When I say "a woman would write a tool" then I mean it in a positive context. To write a tool you have to get behind the whole idea and this is a much more elegant solution. (That goes to my experience that women often write elegant code and men write fast code.) Maybe I've put more effort into a real level 8 ;)
simonzack Moderator 19. Feb 2009	thanks for the clarification :p except lena151, haven't seen much woman doing RCE
Rouse_ 12. Nov 2015	Full solution: http://habrahabr.ru/post/218887/ Sorry, only Russian language:(
Coderess 13. Nov 2015	@Rouse_ It's very interesting solution, great job bro!

Ms-Rem's Ring0 crackme

Download crackme.zip, 517 kb (password: crackmes.de)
Browse contents of crackme.zip

This crackme use packing and ring0 tricks for hiding serial check code.
Crackme install driver dxapi32.sys.
Recommend to run this crackme on WMVare that will save you from problems with fall of the system.
Necessary to write keygen, or find serial on its name.

Difficulty: 7 - Very hard
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 15. May, 2006
Downloads: 1159

Rating

Votes: 5
Crackme is good.

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Solutions

Solution by deroko, published 07. oct, 2006; download (218 kb), password: crackmes.de or browse.

deroko has rated this crackme as awesome.

Send a message to mt3o »

View profile of mt3o »

Discussion and comments

Shism 15. May 2006	You mean: It is a valid serial
Shism 15. May 2006	Great crackme btw
TQN 16. May 2006	Very hard crackme to me ! Need patch the dxapi32.sys to unhide two crackme process.
Shism 16. May 2006	really lol!? Is there gonna be a tutorial for this lol Also how do you recalculate the checksum for the sys after you patch it?
autarky 16. May 2006	BitSum do a PE xsum checker/patcher. You can get it with the free trial download of PECompact. Also, I found trying this with a blank user name gave ... intersting results. And you can always patch the device driver in memory with another device driver. Or a ring0 privilege exploit.
Shism 16. May 2006	This crackme is pretty hard to me.... I wonder if they'll be a tutorial for this
thehyper 16. May 2006	I managed to dump the process and fix the iat. But don't how to get the ep? :( any ideas?
Shism 17. May 2006	What is this trick with the focs.dll, that causes OllyDbg to terminate. Where it says Bad or unknown format of 32-bit executable and the process exits
thehyper 17. May 2006	have same msgbox problem. but ollydbg does not terminate in my case. It detect ollydbg through the FindWindow function.
thehyper 17. May 2006	You can calculate the checksum for the sys file using LordPE
Shism 17. May 2006	I know it finds it through FindWindow... However, my process exits, not OllyDbg terminates
thehyper 17. May 2006	i have the same problem though the process does not exit. it simply hangs. i have not been able to run this crackme in ollydbg. i have started using softice.
Shism 18. May 2006	Damn, I've been trying to get SoftICE to work on my system for ages.... Do you know where I can get a instant working copy for Windows xp sp 1?
zairon Moderator 18. May 2006	Just to make things clear: don't post warez link here!
deroko 05. Oct 2006	excelent crackme, very very good...

mt3o's #1 crackme

Download 1st_mt3o_crackme.zip, 5 kb (password: crackmes.de)
Browse contents of 1st_mt3o_crackme.zip

My first crackme. Lot of xor's are used inside.

To crack this, you have to set up a license file with name in a first line and serial in second line. Serial is created from many xor's and a little checksum is also computed.

As an addition there is a little trick - exec counts time from start till final check and if the elpased time is larger than 5 secs, it breaks. Dunno if it'll work against someone, but hope its a variety.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 20. Apr, 2009
Downloads: 326

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Solutions

Solution by Skid Vicious, published 14. may, 2009; download (16 kb), password: crackmes.de or browse.

Skid Vicious has rated this crackme as nothing special.

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Discussion and comments

Lone.Wolf 21. Apr 2009	Hey dude, i think ive just discovered a little bug (or im too dumb to understand whats going on :P): your >little checksum< function does some calculation by reading the serial -> you read it like this: [ESI+0..3/5..8/A..D/F..12/14..17] BUT your serial mask looks like this "XXXX-XXXX-XXXX-XXXX-" -> what are you trying to read @ esi+14..17 ? best regards :)
mt3o Author 22. Apr 2009	Hi! I suck at asm, so I cant tell what is happening inside compiled program. As far as I tested this, it should be ok. Send me a PM if you want a serial generated for you! At 14..17 there should be checksum, serial is: XXXX-XXXX-XXXX-XXXX-YYYY and YYYY stands for checksum It's not a bug. It is a feature! :D

m@[tador]'s CrackMe#4

Download Crackme#4.zip, 10 kb (password: crackmes.de)
Browse contents of Crackme#4.zip

CrackMe #4 by m@[tador]

1. Find valid Name/Serial pair.
2. Write keygen (or selfkeygen if you can).

Patching not allowed.

Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 05. Jan, 2006
Downloads: 800

Rating

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Solutions

Solution by EsKiMo, published 23. jan, 2006; download (28 kb), password: crackmes.de or browse.

EsKiMo has rated this crackme as quite nice.

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Discussion and comments

ultrasound 05. Jan 2006	Hi m@[tador], I just want to check that I am at the serial routine here, since it seems to be manipulating the right data but doesnt seem to be doing much with the different results.. The program goes into a loop and takes each character from the serial and compares with the letter 'a'.. I have tried this loop with letter > a, < a and =a and none seem to be any good in the end :\
HMX0101 05. Jan 2006	this crackme have a trap, it's a loader, when is executed this make other file in the windows directory compressed with UPX, very nice...
ultrasound 05. Jan 2006	HMX0101, shh its a secret! :P
HMX0101 05. Jan 2006	okey i understand...
m@[tador] Author 06. Jan 2006	ultrasound,HMX0101 :-)
m@[tador] Author 12. Jan 2006	So who can write keygen? Is this crackme harder then 1 difficulty?
costy 13. Jan 2006	for ultrasound I GOT SAME PROBLEM with letter 'a'
EsKiMo 21. Jan 2006	Hey look! This one is not a fossil :)
m@[tador] Author 25. Jan 2006	EsKiMo: Thanx for your solution. :-)

m@[tador]'s CrackMe#5

Download CrackMe#5.ZIP, 17 kb (password: crackmes.de)
Browse contents of CrackMe#5.ZIP

CrackMe #5 by m@[tador]

Compiler: Delphi 6.0 (no VCL)
Packer: N/A

1. Find valid Name/Serial pair.
2. Write keygen (or selfkeygen if you can).

Patching not allowed.

Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 06. Jan, 2006
Downloads: 820

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by Kerberos, published 10. jan, 2006; download (9 kb), password: crackmes.de or browse.

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m@[tador]'s Crackme#6

Download CrackMe#6.ZIP, 24 kb (password: crackmes.de)
Browse contents of CrackMe#6.ZIP

CrackMe #6 by m@[tador]

Compiler: Delphi 6.0 (No VCL, API only)
Packer: N/A

1. Find valid Name/Serial pair.
2. Writing keygen is very hard, try to selfkeygen it.

Patching not allowed.

Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 22. Jan, 2006
Downloads: 675

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Kerberos, published 25. jan, 2006; download (49 kb), password: crackmes.de or browse.

Kerberos has rated this crackme as nothing special.

Solution by m@rio_crk, published 29. jan, 2006; download (72 kb), password: crackmes.de or browse.

m@rio_crk has rated this crackme as boring.

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Discussion and comments

Ox87k 22. Jan 2006	md5? damn!! Selfkeygen is absolutely easy but make a keygen is more hard for me... however i try it!
zairon Moderator 22. Jan 2006	I hope to see some keygens. Selfkeygen is too easy and you won't learn anything :)
Zaphod 24. Jan 2006	The rules are no patching - wouldn't that exclude selfkeygenning? Besides, selfkeygenning is not that easy - Olly says something about "modified fix-ups", whatever that means...
Ox87k 24. Jan 2006	selfkeygen is very easy, change a push in messagebox and woilÃ , the right serial in msgbox ;)
Zaphod 24. Jan 2006	0x87k: Have you actually done it? I did, and it works as long as you are in Olly, but when I patched those bytes in the crackme itself, it didn't work.
Kerberos 24. Jan 2006	Zaphod : I've done loader in dUP (thx for it diablo2oo2) and it prints correct serial key into second EditBox. I'm using SendMessageA API to do it.
Zaphod 24. Jan 2006	Kerberos: I don't know what dUP is, but perhaps you are writing a tutorial :)
Ox87k 24. Jan 2006	Zaphod: I haven't still done it :( i only patch the push in messagebox but in olly.. Kerberos: In SendMessage, have u used the message WM_SETTEXT? Where do u get it?
Kerberos 24. Jan 2006	Ox87k : Yes, i've used WM_SETTEXT. WM_SETTEXT is only numeric constant 0x0C, so use it as parameter for SendMessageA API.
Kerberos 24. Jan 2006	dUP is abbreviation for "diablo2oo2 Universal Patcher" and you can get it from http://navig8.to/diablo2oo2. It's really nice program which is very usefull when you want to do patch/loader.
Zaphod 24. Jan 2006	0x87: Please try the patch "outside" olly - I would like to know if you can make it work. Kerberos: Thanks - I'll get that program immediately.
Zaphod 24. Jan 2006	0x87: I managed to make the selfkeygen work, but I had to write a small piece of code instead of the compare-routine which begins at 139A8
HMX0101 24. Jan 2006	selfkeygen is very easy, only change a jump and the push in the text of the badboy message
Zaphod 24. Jan 2006	hmx0101: Read above :)
HMX0101 24. Jan 2006	i understand, but i can make a loader? or its the same thing?
m@[tador] Author 25. Jan 2006	Kerberos thank you for your solution.. :-) Now is time to learn dUP for me...

m@[tador]'s CrackMe#7

Download CrackMe#7.zip, 26 kb (password: crackmes.de)
Browse contents of CrackMe#7.zip

CrackMe #7 by m@[tador]

Compiler: Delphi 6.0 (No VCL)
Packer: N/A

1. Find valid Name/Serial pair.
2. There are some anti-debug tricks.
3. Try to crack it. You can patch it.
4. Writing keygen is the best way to show your cracking skills.

PS: It works nicely on WinXP, but i hadn't test it on another OS.
Meybe this crackme will not work properly on lower versions of Windows.

Good luck!

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 30. Jan, 2006
Downloads: 612

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Solutions

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Discussion and comments

Kerberos 30. Jan 2006	Hey m@[tador], nice crackme, but isn't there a little bug ? In final loop where entered password is compared with computed password. If first part of password is shorter than second part then one digit from second part isn't checked :-/

m@[tador]'s KeyGenMe#2

Download KeyGenMe#2.zip, 24 kb (password: crackmes.de)
Browse contents of KeyGenMe#2.zip

Easy KeyGenMe, written on Delphi (no VCL, API only).

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 29. Nov, 2005
Downloads: 1148

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by dr00pi, published 08. dec, 2005; download (185 kb), password: crackmes.de or browse.

dr00pi has rated this crackme as nothing special.

Solution by m@rio_crk, published 03. dec, 2005; download (98 kb), password: crackmes.de or browse.

m@rio_crk has rated this crackme as nothing special.

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Discussion and comments

Immortal_One 05. Dec 2005	RC4 that should NOT be aloud!
m@[tador] Author 06. Dec 2005	Just look to the Difficulty. CrackMe is for newbies.
Immortal_One 06. Dec 2005	I was not getting at the difficulty of the crackme.You used RC4 in your crackme.I don't think you should be aloud to use other peoples encrypter/ciphers.

m@[tador]'s KeyGenMe#3

Download KeyGenMe#3.zip, 23 kb (password: crackmes.de)
Browse contents of KeyGenMe#3.zip

Platform: Windows
Compiler: Delphi 6.0. (no VCL, Win32API only)
Packer: No
Level: 2 (No so hard)
Protection: there is some crazy debug protection

Patching: Not allowed
KeyGenerator: This is the target.

Hope you'l enjoy!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 04. Dec, 2005
Downloads: 1196

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Game-Over, published 08. dec, 2005; download (37 kb), password: crackmes.de or browse.

Game-Over has rated this crackme as nothing special.

Solution by warrantyVoider, published 08. dec, 2005; download (154 kb), password: crackmes.de or browse.

warrantyVoider has not rated this crackme yet.

Solution by Ox87k, published 08. dec, 2005; download (50 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Immortal_One 07. Dec 2005	Has anyone submit a solution for this crackme yet?
Ox87k 07. Dec 2005	yes.. i submit my solution some days ago!
Immortal_One 07. Dec 2005	Just checking to see if its worth submiting my solution.Anyone else?
warrantyVoider 07. Dec 2005	Me, I submitted on sunday. Seems like our moderators are getting swamped at the moment. 7 crackmes & 5 solutions in queue...
HMX0101 07. Dec 2005	for the serial calculation: - get a unique id for each computer - add 19 to the eax - xor the id with "m@[tador]'sKeyGenMe#3" without the quotes
Shism 07. Dec 2005	crazy anti-debugging?
HMX0101 07. Dec 2005	this crackme is more easy than the first
Immortal_One 08. Dec 2005	Yes, HMX0101 i think so too.

mucki's crackme#1

Download mucki_-_crackme#1.zip, 44 kb (password: crackmes.de)
Browse contents of mucki_-_crackme#1.zip

This is my first crackme (Keygenme), written in C++.

- find the solution
- make a keygen
- and submit a tutorial

tested on WinXP SP1 but should also work on other windows os.

Regards,

mucki

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 24. Aug, 2006
Downloads: 1374

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by Nuno_1, published 28. aug, 2006; download (121 kb), password: crackmes.de or browse.

Nuno_1 has rated this crackme as quite nice.

Discussion and comments

cyclops Moderator 25. Aug 2006	I have done a selg keygen on it. I am lazy to write a solution... ht*p://rapidshare.de/files/30704628/crackme1_patched2.zip.html
D4ph1 26. Aug 2006	I found the key for my name but it only works when debugger is on. when i run it all alone the same serial doesnt work....is this a bug?
D4ph1 26. Aug 2006	Ooops...now i see...A keygen is on the way ;)
mucki Author 26. Aug 2006	sorry D4ph1 but it's not a bug - it's a trap.
geeko 26. Aug 2006	My keygen was rejected. Does anyone know why?
zairon Moderator 26. Aug 2006	D4ph1, you are not the only one falling in the trap... geeko did the same :)
D4ph1 26. Aug 2006	I cant keygen this. someone submit a tut plz :(
mucki Author 26. Aug 2006	hint: the algo is simple but only the last digit is a bit tricky (calculated from the previous number not from the name)
Zaphod 27. Aug 2006	It would be easy to write a selfkeygen because the full serial (including the last digit) is in memory at some point, but as mucki says, this last digit is rather tricky. Too tricky for me, I'm afraid, but I'm still working on it...
D4ph1 27. Aug 2006	i make the keygen and when i have time i will submit the tut. great work mucki ;)
cyclops Moderator 28. Aug 2006	Every one is falling into the trap.... i think my self keygen works....
Zaphod 29. Aug 2006	I haven't entered the trap part at any time - I am always sent to the right serial-calculation part. Then I thought, oh, of course, that's because I have the HideDebugger plugin! But no, I removed the HideDebugger.dll and the HideDebugger.ini files, but still I come to the correct serial calculation part. I wonder why that is - any suggestions?
mucki Author 29. Aug 2006	which debugger do you use?
Zaphod 29. Aug 2006	Olly - Heh, first I wrote "Olly" and nothing more - then I was told that was too short a message, so now I write this :)
mucki Author 01. Sep 2006	I have also tried it. If HideDebugger.dll is in the Olly-dir nothing happens otherwise Olly falls into trap.
Zaphod 02. Sep 2006	Yeah - that's how it SHOULD be, but not on my computer. Mysterious...
polizei 27. Feb 2007	perhaps i missed the "trap", but i just kept jmping around it. i tested while not debugging and my keygen still worked. i'll right a tut to accompany it soon.
hound 27. Feb 2007	Lol, not sure how you could miss it. The check happens right after the GetWindowText call..... Anyway, cool idea :D

mucki's crackme#2

Download crackme2.zip, 31 kb (password: crackmes.de)
Browse contents of crackme2.zip

This is my second crackme (keygenme), now written in Assembler.

- find the solution
- make a keygen
- and submit a tutorial

tested on WinXP SP1 but should also work on other windows os.

Regards,

mucki

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 09. Oct, 2006
Downloads: 1813

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by BaKaE, published 11. oct, 2006; download (243 kb), password: crackmes.de or browse.

BaKaE has rated this crackme as quite nice.

Solution by hardcoder, published 07. oct, 2006; download (4 kb), password: crackmes.de or browse.

hardcoder has rated this crackme as nothing special.

Solution by ghostz, published 07. oct, 2006; download (618 kb), password: crackmes.de or browse.

ghostz has not rated this crackme yet.

Solution by Kostya, published 07. oct, 2006; download (3 kb), password: crackmes.de or browse.

Kostya has rated this crackme as quite nice.

Solution by geeko, published 07. oct, 2006; download (206 kb), password: crackmes.de or browse.

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Solution by evo_it, published 07. oct, 2006; download (10 kb), password: crackmes.de or browse.

evo_it has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

BaKaE 05. Oct 2006	nice, i've cracked your first one, now i try this one >> what protection has it ??
kiTo 05. Oct 2006	PEiD says "EXECryptor 1.x.x -> SoftComplete Developement". I haven't checked more about it.
EvOlUtIoN 05. Oct 2006	i htink peid commits a mistake, it isn't packed at all
mucki Author 05. Oct 2006	you are right, i manipulated the pe-header ;)
badmojo 05. Oct 2006	Its not packed at all, just some simple antidebugging tricks and a simple serial algo, pretty good for newbies. mucki, is the function at 401288 an extra challenge of some sort or just leftover code? Thanks
mucki Author 05. Oct 2006	i tried to make a md2 crackme, but there were only errors. i left the code because i was too lazy to remove it again. you can detect it with krypto analyzer (plugin of peid).
evo_it 05. Oct 2006	nice crackme it can get newbies learn some nice tricks
DaBookshah 06. Oct 2006	I liked the tactic of having irritating, repetitive music, so that when its paused the cracker has a chance of going nuts.
ghostz 06. Oct 2006	Nice Crackme ;) I Try to submit a solution and keygen with source (Delphi 7) Thx mucki :)
baudstupid 06. Oct 2006	In the interest of education can someone please explain to me how the debugger detector works??? It's only a few lines of assembler, with no conditions like JZ or anything? How does the prog decide to show the msgbox or not? Please educate me!
hardcoder 06. Oct 2006	I wonder what is the use of code beyond 00401288. KeyGen is too easy.I like 0040103C \|. 9C PUSHFD 0040103D 813424 540100>XOR DWORD PTR SS:[ESP],154 00401044 \|. 9D POPFD nice but simple trick
DeepBlue 06. Oct 2006	I am single-stepping over a PUSH Command and the whole Program starts running. I was like ZOMG WTF!!!!1 Has to be some hideous SEH-Handler am I right? :)
DeepBlue 06. Oct 2006	Oh, now that I see the comment above mine its becomes clear to me. I am so blind ;) love that trick. <3
BaKaE 09. Oct 2006	your endless-loop trap in edx is nice but how did make it, how did the prog come to edx = 1 instead of edx = 0??
geeko 09. Oct 2006	we dont care of edx. patch in mem to 0 and go on debugging. Maybe is set in the fake SEH. good
BaKaE 09. Oct 2006	i know i know i wrote a tut maybe approved or not mucki should be proud => so many solutions for his one
mucki Author 09. Oct 2006	thx for the nice tutorials! it's solved now so i uploaded it again incl source. that's why it was off on sunday.
evo_it 09. Oct 2006	as i wrote in my solution edx is set using a code similar to the one that's in the IsDebuggerPresent API...
2HeLLboY 10. Oct 2006	bit hard for newbies like me i made a crack but the keygen.....i couldn't
mucki Author 10. Oct 2006	normally you have to write a keygen to solve a crackme and in my opinion the algo is rather easy.
hardcoder 10. Oct 2006	@2HeLLboY: you don't need to understand the algorithm at all. It's so easy that you can Rip it and use for you own need
BaKaE 10. Oct 2006	it is better to understand the algo, to learn more about asm you can't learn from ripping this code
deskyet 23. May 2007	Your right BaKaE, i was trying to understand how SHR and SHL works in delphi, but I can't find a way how you can move the bits up to the left and right. Somebody know how to SHRL EAX,4 if EAX=0000006A, I know its 2 after Shifting, but How to calcutlate that..? PM me or answer here please, thank you.
deskyet 23. May 2007	nah, I already got it, but I still don't know how you can calculate it with the windows calculator bit shifting. in delphi its for example: var EAX: integer; begin EAX:= $6A SHL 4; showmessage(IntToStr(EAX));
mucki Author 23. May 2007	bitshift to the left is the same like *2 and bitshift to the right is the same like /2 -> there is not much to calculate. if you want to take windows calculator for bitshift enter your number and click "bin" to convert it into a binary number. then add a 0 behind the value and convert it back into decimal/hex.
razor7771911 15. Apr 2012	can any one help me i am n00b

mucki's crackme#3

Download crackme3.zip, 14 kb (password: crackmes.de)
Browse contents of crackme3.zip

This is my third crackme (enableme/keygenme), written in VB6.

- find the solution
- make a keygen
- and submit a tutorial

tested on WinXP SP1 but should also work on other windows os.

Regards,

mucki

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 07. Nov, 2006
Downloads: 768

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Solutions

Solution by Ank83, published 22. nov, 2006; download (42 kb), password: crackmes.de or browse.

Ank83 has not rated this crackme yet.

Solution by HMX0101, published 22. nov, 2006; download (36 kb), password: crackmes.de or browse.

HMX0101 has not rated this crackme yet.

Discussion and comments

Fergo 07. Nov 2006	I don't know if this is a bug of something, but the program crashes when I close it ( it doesn't terminate after the "animation" ).
BaKaE 08. Nov 2006	@fergo works on my pc @mucki really nice tricks can i patch the smartcheck check ??
mucki Author 08. Nov 2006	patching is allowed to enable the button and to remove the tricks/animations but no good-boy-jump and selfkeygen
ProTreeBrain 13. Nov 2006	For mucki: I don't understand if it is a bug/ program is unclosable. It must be terminate with bruteforce.
mucki Author 13. Nov 2006	i had no problems but fergo said the same, so i will check it when i have time.
Ank83 16. Nov 2006	Hm... I have problems with this one. I killed the two procedures for protection, I enabled the button and went to password generating procedure. Now in the first part the app gets the sum of Asc number for each char in the name, than from the sum it takes out the sum of Asc numbers of the name of the local PC. Now goes the part that I dont understand, but I'm, still working on it. In the mean while I run the target in SmartCheck and there is notice that our entered serial is compared with some serial. When I enter the serial that popuped in SC - BADBOY message. Hm ? Is someone working on this one ? Need some help. Best Regards Ank83
mucki Author 16. Nov 2006	hi Ank83, you are very close to solve it, only two simple operations are missing. then there are a few lines of confusing crap code - sorry for that, maybe i submit an improved one soon also with bugfix. (next one will be better again / not in vb) thx that you are still trying
binbinbin 19. Nov 2006	97611fde0bc4e3344f872df926d548cb I found this
Ank83 19. Nov 2006	binbinbin I think that this target has no valid serial.
mucki Author 20. Nov 2006	you need a plugin against isdebuggerpresent detection
HMX0101 20. Nov 2006	Very easy... I fished serial for my name/computer name ;) btw, i don't know why exists a md5 implementation in the crackme and you don't use it?
mucki Author 20. Nov 2006	md5 hash will be calculated if you fall into isdebuggerpresent-trap
HMX0101 20. Nov 2006	Ahh, but isn't important?
mucki Author 20. Nov 2006	no, but it works as you see above
movzx 22. Nov 2006	nice trick.. :D im still searching for the info about ZwQueryInformationProcess do you have a document like Win32API help file that describes the ntdll.dll function?? thx.

mucki's crackme#4

Download crackme4.zip, 16 kb (password: crackmes.de)
Browse contents of crackme4.zip

This is my fourth crackme (keyfileme + bruteforceme server), now written in Java.

- create a valid keyfile
- write a bruter
- get the serial
- and submit a tutorial

hints:
- serial is short, case insesitive
- to enter serial use a telnetclient at standard-port 23 (command: "telnet localhost")

Tested on WinXP but should also work on other os.

Regards,

mucki

Difficulty: 3 - Getting harder
Platform: Multiplatform
Language: Java

Published: 04. Dec, 2006
Downloads: 576

Rating

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Solutions

Solution by macabre, published 11. dec, 2006; download (38 kb), password: crackmes.de or browse.

macabre has rated this crackme as quite nice.

Discussion and comments

macabre 05. Dec 2006	Sorry but This is the first time I've attempted to crack a java app and I'm running on Linux so it is very possible the issue is mine. I seem to be getting an error and it maybe with my AWT library.... any suggestions? >>>> java server.CM4 Exception in thread "main" java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke(libgcj.so.70) at server.Loader.load(Loader.java:44) at server.CM4.main(CM4.java:14) Caused by: java.awt.AWTError: Cannot load AWT toolkit: gnu.java.awt.peer.gtk.GtkToolkit at java.awt.Toolkit.getDefaultToolkit(libgcj.so.70) at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(libgcj.so.70) at java.awt.Window.<init>(libgcj.so.70) at java.awt.Frame.<init>(libgcj.so.70) at java.awt.Frame.<init>(libgcj.so.70) at javax.swing.SwingUtilities$OwnerFrame.<init>(libgcj.so.70) at javax.swing.SwingUtilities.getOwnerFrame(libgcj.so.70) at javax.swing.JOptionPane.<clinit>(libgcj.so.70) at java.lang.Class.initializeClass(libgcj.so.70) at server.KeyfileCheck.main(KeyfileCheck.java:33) at java.lang.reflect.Method.invoke(libgcj.so.70) ...2 more Caused by: java.lang.NoSuchMethodError: postChoiceItemEvent (Ljava.lang.String;I)V <<No stacktrace available>>
macabre 05. Dec 2006	What is sad, is that I decrypted the KeyfileCheck and got the algo out of it, just can't test it... sad that I can crack it but not run it... lol I'm sure it's just the way my awt is installed... oh well :)
mucki Author 05. Dec 2006	i tested my crackme under debin linux and a had also errors. i am not sure if that's really a multiplatform one.
macabre 08. Dec 2006	Submitted my tutorial. That was a fun one. Seemed fairly easy and a good learning tool. Level 2 might be more appropriate. I had a good time with this one and learned java in the process :) Thx Mucki!
mucki Author 08. Dec 2006	i rated this one level 2. i guess zairon never accepted the difficulty i suggested.
zairon Moderator 09. Dec 2006	Yes, I changed to 3; it's not a problem to change the level but I wanted to see some feedback before. For every approved crackme I can't decide the right level because it's something personal; you know, my level 3 could be your level 1. I often change the level when I have some feedback through comments/tutorials.
LFalch 03. Apr 2013	I just finished this one! Thanks for the crackme it was a lot of fun.

mucki's crackme#4a

Download crackme4a.zip, 17 kb (password: crackmes.de)
Browse contents of crackme4a.zip

In my opinion the 4th crackme was the best one of my crackmes yet, but it was written in java which was the reason why not many of you tried it. That's why I decided to write it again in MASM, but of course it has other protections now. It's a Server-Crackme again, so you can also write a client bruter to get the valid serial.

- get the serial
- and submit a tutorial

hints:
- serial is short, only lowercase characters
- to enter serial use a telnetclient at standard-port 23 (command: "telnet localhost")

Tested on WinXP emb SP1 but should also work on other Windows os.

Regards,

mucki

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 15. Jan, 2007
Downloads: 1873

Rating

Votes: 4
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by dreak, published 21. jan, 2007; download (79 kb), password: crackmes.de or browse.

dreak has rated this crackme as quite nice.

Solution by profdracula, published 21. jan, 2007; download (9 kb), password: crackmes.de or browse.

profdracula has rated this crackme as nothing special.

Discussion and comments

mucki Author 16. Jan 2007	i guess there will be more than one valid serial, but one is sufficient.
profdracula 16. Jan 2007	hi mucki, solved and uploaded solution. If you think one serial is enough, then check out the keygen :)
mucki Author 16. Jan 2007	hey, you are very fast! hope you liked it. you wrote a keygen? that's more than i had expected.
hardcoder 16. Jan 2007	Great as always, nice to see you come up with new ideas every time, one thing that remained same was your trap flag trick :-) regards
mucki Author 21. Jan 2007	hi nice solutions. i know it's a bit too easy but i had some trouble while programming it so i wanted to get rid of it - that the reason for the weak serial protection. the 0x17 i used to encrypt the strings is the crc8 value of the file (anti patching protection).
profdracula 21. Jan 2007	Well I enjoyed this. Waiting for your next crackme :)
dreak 21. Jan 2007	Thanks! I thought this one was great, even if my solution seems to be a bit... wrong in comparison to profdraculas'
mucki Author 23. Jan 2007	wow, 1404 downloads in such a short time! do you have problems with your counter?
zairon Moderator 23. Jan 2007	mucki, I don't think. That's interesting indeed. Maybe you used a downloader bot just to increase the counter :p We'll check! :)
mucki Author 23. Jan 2007	i would never do that :)

mucki's crackme#5

Download crackme5.zip, 9 kb (password: crackmes.de)
Browse contents of crackme5.zip

This is my fifth crackme (webservercrackme), written in MASM.

- write a keygen
- and submit a tutorial

hints:
- to enter serial use a browser and insert address "http://localhost/"

Tested with OS: WinXP
Tested with browsers: Mozilla Firefox / Lynx

Regards,

mucki

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 23. Feb, 2007
Downloads: 714

Rating

Votes: 6
Crackme is good.

Rate this crackme:

Solutions

Solution by roulio, published 02. mar, 2007; download (14 kb), password: crackmes.de or browse.

roulio has not rated this crackme yet.

Solution by Ox87k, published 02. mar, 2007; download (274 kb), password: crackmes.de or browse.

Ox87k has rated this crackme as awesome.

Discussion and comments

hardcoder 19. Feb 2007	awesome mate, I've always liked your crackmes..... Your Crackmes ROCK
Ox87k 19. Feb 2007	really original and always good! well done mucki ;)
mucki Author 19. Feb 2007	thx guys, i'm waiting for your solutions now :)
jB_ 20. Feb 2007	Really good idea.
halsten 21. Feb 2007	Good crackme, I liked the idea of it. Keep it up!
goodol 21. Feb 2007	i got some clues to the your problem.. now i can know the meaning of "Needs special knowledges". hehe :)
mucki Author 21. Feb 2007	Ox87k found a bug in my crackme. I will fix it soon.
cobrasniper555 22. Feb 2007	Solved....I liked this one a lot. Thanks man/m'am! Lol. Anyhow, I'm going on vacation, since it's Rodeo break for me right now, but after it, I'll put up a solution! This one deserves it!
mucki Author 23. Feb 2007	bug is fixed now. there was no valid serial if crc32 value did not contain 8 characters. i'm very sorry that the offset numbers don't match with those of the old version but algo is the same.
zairon Moderator 23. Feb 2007	Fixed version uploaded, enjoy!
red477 24. Feb 2007	Really nice!!! But this one doesn't have any music;)
mucki Author 24. Feb 2007	i removed the music in the fixed version because i couldn't stand it any longer
mucki Author 06. Mar 2007	thx guys for your nice solutions from roulio's solution: 004024D7 \|. 35 2037EFC6 XOR EAX,C6EF3720 004024DC \|. 35 B979379E XOR EAX,9E3779B9 xoring it two times (why two times ? :) C6EF3720 and 9E3779B9 are tean values. watch kanal crypto analyzer ;)
cyclops Moderator 06. Mar 2007	Aah, nice one...some thing like my crackme Jade...

mucki's crackme#6

Download crackme6.zip, 2 kb (password: crackmes.de)
Browse contents of crackme6.zip

This is my sixth crackme, written in MASM, TASM and... find it out yourself!

- get the serial
- and submit a tutorial
- no bruteforce

Tested with OS: DOS 6.2

Regards,

mucki

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: Unspecified/other

Published: 16. Mar, 2007
Downloads: 487

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by Iñaki Viggers, published 16. jun, 2007; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

moofy 17. Mar 2007	nice language you used there, almost done, will submit the solution when im done.
mucki Author 16. Apr 2007	hint1: it's a brainfuck crackme hint2: you can run it under windows if you remove "PE" or 0C0h at offset 3Ch hint3: the easiest way to solve it is to rip BF code and analyze it instead of asm code
Shism 08. Jun 2007	Ok I removed PE and it still wont run..
mucki Author 08. Jun 2007	change "PE" at offset 0xC0 to "xy" (or something else) and it will run

mucki's crackme#7

Download crackme7.zip, 48 kb (password: crackmes.de)
Browse contents of crackme7.zip

This is my 7th crackme (keygenme), written in MASM.

- create a valid cd-image
- make a keygen
- and submit a tutorial
- patching of exe file not neccesary (it's ok if you are not able to create a cd-image)

hint:
- it's possible to manipulate a cd-image with an hex-editor
- close other programs before you start my crackme, it's possible that there will be problems

tested on WinXP SP1 but should also work on other windows os.

Regards,

mucki

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 04. Apr, 2008
Downloads: 655

Rating

Votes: 8
Crackme is good.

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Solutions

Solution by DrPepUr, published 10. apr, 2008; download (580 kb), password: crackmes.de or browse.

DrPepUr has rated this crackme as awesome.

Discussion and comments

r00ster 04. Apr 2008	It's really funny, for me is a good level-3 ;-) I have defeated anti-debugging routine, and have the program opens my cd-image. Too bad, just after that there is a crypto routine on program startup path that i don't understand: it cyphers my path then results in a ExitProcess call.... ...Pretty confused...and maybe noob... :-\|
mucki Author 06. Apr 2008	I only used standard crypto routines, nothing special. You can find them if you check it with KryptoAnalyzer plugin of peid.
DrPepUr 08. Apr 2008	Ok, I am lost on this one. I managed to create a valid cd image, no problem...here is where I am at. The program takes your name and makes a checksum then encrypts the entered serial then xor [Name Checksum], [Encrypted Serial] 07FFFFFFFh 0270Fh jg @Bad if you pass this check the xored value gets ran through wsprintf and modifies the code below where EAX is supposed to get set.. starting with 270fh there seems to be about 1,175 possiblities where the modified code will set EAX to 1 I have no Idea of how to proceed, can anyone throw me a bone on this? DrPepUr
DrPepUr 08. Apr 2008	and 07FFFFFFFh cmp 0270Fh sorry I am tired lol
mucki Author 08. Apr 2008	and 07FFFFFFFh: sets the first bit to 0 - otherwise "jg @Bad" would not work cmp 0270Fh (9999 decimal): to prevent that wsprintf destroys code your task is that wsprintf creates executable code
DrPepUr 08. Apr 2008	yeah I know, I wrote a little program that listed all the possible outcomes from 00 to 270fh came up with like 1,175 possible ways. that the wsprintf would modify the code to where the outcome would be 1. was just curious if this was more brute forcing or keygenning or a little bit of both. I dunno still got a lot of noob in me, just cant think of a way to keygen this.
r00ster 08. Apr 2008	@DrPepUr: Can i ask you to exchange infos about this CM? I have passed anti-debugging routines and open the cd-image, but i'm stuck after this. I think we can help each other, and maybe understand a little more of that program. If you think that is possible, let me know.
DrPepUr 09. Apr 2008	I got it, writing tutorial now...guess I just needed some sleep.
mucki Author 09. Apr 2008	you don't really have to brute force it. just look which opcodes between 30h and 39h you can use to create executable code. the last byte will be set to 0.
DrPepUr 09. Apr 2008	I figured it out, tutorial + keygen submitted this was a nice crackme enjoyed it.
DigitalAcid 10. Apr 2008	Nice tutorial. Looks like a nice crackme too.
Ox87k 11. Apr 2008	I don't know how it's possible to rate this crackme as only good. Mucki, your ideas are awesome, you make always original crackme. I love your work mate! This one is pretty cool and maybe level3 would be better. Keep it up man, waiting for your next masterpiece!
mucki Author 12. Apr 2008	Thx guys, I'm glad that you like it.
BRK12345 13. Apr 2008	Yeah,it a great crackme!!

mucki's crackme#8

Download crackme8.zip, 396 kb (password: crackmes.de)
Browse contents of crackme8.zip

This is my 8th crackme (keygenme), written in MASM.

- create a keygen
- and submit a tutorial
- the serial has to work outside the debugger

tested on WinXP but it should also work on other windows os.

Source included. Password is the valid serial for mucki.

Regards,

mucki

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 21. Oct, 2010
Downloads: 675

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by Vallani, published 27. oct, 2010; download (219 kb), password: crackmes.de or browse.

Vallani has rated this crackme as quite nice.

Discussion and comments

Voik 22. Oct 2010	This will need CRC32 bruteforce, right? It must return zero, i think.
mucki Author 22. Oct 2010	You don't need bruteforce to solve it. The solution is a little bit different (it's more an exploit). Watch the exception handler.
Killswitch 22. Oct 2010	having made these assumptions: hash_x = xor hash_serial, hash_name Z = hash_name / hash_x - V - Z = 0 hash_name / hash_x = 0 \| *hash_x hash_name = 0 this is because the serial is only accepted if eax is 0 in the end, hence Z = 0. This would mean that the names would have to be very limited so this doesnt seem very right to me, and the exception handler refers to mov eax, -1, which isnt accepted as a valid solution either, so i'm pretty much stuck after a long time of reversing there. could you tell me if this is the right way to go, please?
Killswitch 22. Oct 2010	i think i might be on the right way.. you have to manipulate the serial to overwrite the exception handler and set it to right after the mov eax, -1?
mucki Author 22. Oct 2010	I had another address in mind. After causing an exception you should also restore the stack because it's often in a mess.
Killswitch 22. Oct 2010	alright, so i basically managed to buffer overflow the push now and it "works" ( given a good serial+name ). trying to write the keygen now
Vallani 22. Oct 2010	I like that KeyGenMe. Nice Work mucki. Vallani: "OTP2tQ00@h#!@" Solution follows after I've got some sleep. Initiating shut down sequence for me now :) .
Xspider 23. Oct 2010	so the story begins from here 004020C8 love this kgnme thank you mucki :D
SasukeHa 23. Oct 2010	This is Very Lame Crack ME Just put same value for username and password for example user: SasukeHa pass: SasukeHa I'd show Vaild serial PUSH 00402000 ; /String2 = "SasukeHa" PUSH 00402011 ; \|String1 = "SasukeHa" CALL <JMP.&kernel32.lstrcmpA> ; \KERNEL32.lstrcmp TEST EAX,EAX MOV EAX,10 MOV EBX,OFFSET 0040705C ; ASCII "INVALID SERIAL" JNE SHORT 0040108B ;does user=pass ? ADD EAX,30 ADD EBX,2 ;yes user= ebx here store test INVALID add 2 so it'd omit the 2 first letters -_- turn to VALID PUSH EAX ; /Type PUSH OFFSET 00407039 ; \|Caption = "Information" PUSH EBX ; \|Text PUSH DWORD PTR SS:[ARG.1] ; \|hOwner => [ARG.1] CALL <JMP.&user32.MessageBoxA> ; \USER32.MessageBoxA Sorry but this is one of the worst crackmes I've seen turn to solved please
mucki Author 23. Oct 2010	@SasukeHa: - the serial has to work outside the debugger to get access to the source the last characters must be ==@h#!@
Voik 23. Oct 2010	Name: mucki Serial: pgqX=w==@h#!@ Very nice crack me! Tutorial soon! (:
Voik 23. Oct 2010	Name: mucki Serial: pgqX=w==@h#!@ Very nice crack me! Tutorial soon! (: mucki = 03970AA6 ------------------------------ 00970AA6 970AA600 00A60A97 101001 100000 101010 010111 29 - 20 - 2A - 17 p - g - q - X ------------------------------- 00000003 00000300 00030000 000000 110000 000000 000000 00 - 30 - 00 - 00 = - w - = - = ------------------------------ "pgqx=w==" + "@h#!@" = "pgqX=w==@h#!@"
mucki Author 23. Oct 2010	ok i'm sorry that i didn't really check the base64 algo so there are many possible solutions. the password for the source is pgqXAw==@h#!@
tamaroth Moderator 25. Oct 2010	tamaroth ufRG+gRG@h#!@ quite funny with the SEH manipulation, kudos for that ;-)
\|CraniX\| 26. Oct 2010	Name " " Serial " " Didn't have to crack :P
\|CraniX\| 26. Oct 2010	Sorry that's not outside the debugger.

mucki's mucki's protector

Download mp.zip, 20 kb (password: crackmes.de)
Browse contents of mp.zip

Welcome to a new challange by mucki!

This time I wrote an unpackme in MASM. I will publish the source if someone solved it. I hope in the future you will write your own packer instead of using upx or something else. I tried to make it as easy as possible so it's great for newbies.

Task for the newbies: unpack the protector and write a tutorial
Task for the professionals: write an unpacker and a tutorial

Tested on WinXP SP1 but should also work on other windows os.
Regards,

mucki

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 12. Apr, 2007
Downloads: 1039

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by profdracula, published 18. apr, 2007; download (5 kb), password: crackmes.de or browse.

profdracula has rated this crackme as nothing special.

Solution by El_PuPaZzArO, published 18. apr, 2007; download (990 b), password: crackmes.de or browse.

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Discussion and comments

TFB 10. Apr 2007	Nice :) But its kind of easy...
Ox87k 11. Apr 2007	the src of a new packer is always good XD good challenge mucki, you are always original..
deroko 11. Apr 2007	unpacker is not needed :) Only simple code that should decrypt code section. If you want unpacker I can write it, it ain't hard :) Anyway good to see that more unpackmes are showing up. I'm really bored of various keygenmes...
mucki Author 11. Apr 2007	I know unpacking is not really a challange. maybe the source is a bit more interesting - so try to solve it :)
Ox87k 11. Apr 2007	i tried to protect some appz made by me (for tests) in C and asm but they didn't work. Why? I used your packer original and unpacked but same results. Is it normal?
cobrasniper555 12. Apr 2007	Now...do we upload a tutorial for the password to the source.zip? Or is it in the unpacked exe somewhere? Because I can't find it, anyhow, mucki, I've made an unpacking script in MASM, if you're interested.
cobrasniper555 12. Apr 2007	Nevermind, it's faulty.
mucki Author 12. Apr 2007	Yes you are right, it's a bit buggy. The problem is that my unpacker is sometimes not allowed to execute this command: mov byte ptr[esi],al Does anyone what's wrong? I have no idea :(
deroko 12. Apr 2007	chage permissions on code section.
mucki Author 12. Apr 2007	to get the protected programs work you have to enable the writable flag in the .text section. I will fix the protector soon.
zairon Moderator 12. Apr 2007	[Crackme updated]
Ox87k 12. Apr 2007	well done but now the zip file isn't protected anymore! Mucki!!!! :)
mucki Author 13. Apr 2007	Oh dear - I forgot. Sorry Ox87k.
hardcoder 15. Apr 2007	again, It's not working
mucki Author 15. Apr 2007	@hardcoder: which application?
Nacho_dj 15. Apr 2007	Hello mucki: I do not know which could be the reason, but after protecting a Delphi compiled target, it cannot be run. When debugged, I find that the EP leads you to an area full of zeroes, in last section... Is this a bug? Anyway, thanks for your work! Nacho_dj
mucki Author 15. Apr 2007	I'm not sure but I guess the reason is that there is no space behind the last section. (my protector doesn't create an own section, it only expands the last section for the decrypter code)
hardcoder 15. Apr 2007	exactly that could be the reason.. Hoping to get a fixed version.....
Nacho_dj 15. Apr 2007	Yep, it expands last section, but in this Delphi's case I have found that it only expands Virtual Size whilst Raw Size remains the same as before protecting the target. Maybe this could be the reason of the zeroes there...

mucki's mucki's protector II

Download mp2.zip, 12 kb (password: crackmes.de)
Browse contents of mp2.zip

Welcome to a new challange by mucki!

I wasn't sure if to write a better protector or a new crackme - so you get this. I tried to make it a bit more interesting than last one.

- write a keygen
- and submit a tutorial

Tested on WinXP SP1 but should also work on other Windows os.

Regards,

mucki

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 06. Jun, 2007
Downloads: 584

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Solutions

Solution by Numernia, published 17. nov, 2009; download (107 kb), password: crackmes.de or browse.

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Discussion and comments

boonz 07. Jun 2007	I've written a keygen although I can't get the dump run properly =O. Any hints on how to rebuild?
mucki Author 07. Jun 2007	check crc32 value of file. it's really crc32 and not tean ;)
boonz 07. Jun 2007	my bad, got it alright :) thank you for this cm!
rAsM 07. Jun 2007	Hi, you must write a bruteforcer witch try to find somme expected bytes like: POP DWORD PTR FS:[0] ADD ESP,4 The other improper solution is: xor edx,edx pop eax ret
mucki Author 07. Jun 2007	the password you need to decrypt this part is: 12345678h it's a bit like my crackme#6 which is unsolved yet so i decided to give you the chance to solve this crackme also without the last part.
moez 22. Jun 2007	:( i cant find solution
mucki Author 22. Jun 2007	here are valid serials: user: mucki serial: 23BC169C#! or: 24D8AF15#X (a bit cheated)
r-Evolution 09. Sep 2010	Your packer's code looks like UPX's one.anyway unpacking was too easy!!!!working on the keygen now

MulleDK13's First CrackMe

Download CrackMe.zip, 5 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Okay. Your task is not to just gain access, but to find the serial.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 29. Oct, 2009
Downloads: 683

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Solutions

Solution by jspedros, published 30. oct, 2009; download (1 kb), password: crackmes.de or browse.

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multiarc's BruteForse_not_work

Download Brute.zip, 71 kb (password: crackmes.de)
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Need Password...
Password length is 4 simbols minimum (typed).
BruteForse did not working!

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 06. May, 2007
Downloads: 313

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Mumbo Jumbo's Keygenme

Download keygenme.zip, 22 kb (password: crackmes.de)
Browse contents of keygenme.zip

My 1st keygenme. Keygen it

Difficulty: 7 - Very hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 06. Mar, 2004
Downloads: 1285

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Solutions

Solution by nEo_TheOne, published 10. mar, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 07. mar, 2004; download (13 kb), password: crackmes.de or browse.

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muyoucumian's CrackMe

Download CrackMe.zip, 2009 kb (password: crackmes.de)
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1.This prodecure can only work normally in Windows xp, it will crashed if work in Win7.
2.If you enter right serinal number, it will popup a dialog, the content is "You Get it!".If you enter wrong serinal number, nothing will happen.
3.I used SMC skill in the prodecure.
4.I hope you can find and analysis the arithmetic, explode it may loss many fun.
5.It's easy, have fun with it!
6.I compressed the file with .7z format for smaller size, if you cannot unpack it, change the suffix name to .7z then unpack it.

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: C/C++

Published: 23. Sep, 2015
Downloads: 628

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Discussion and comments

acruel 26. Sep 2015	Crashed in my Windows XP SP1! XD

myname's key1gen

Download key1gen.zip, 178 kb (password: crackmes.de)
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you can crack it patch anything, find the serial. Enjoy :)
challenge from me to you.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 02. Mar, 2007
Downloads: 1425

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Send a message to N00bCPP »

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N00bCPP's Middle Keygenme

Download KeyGenMe.zip, 90 kb (password: crackmes.de)
Browse contents of KeyGenMe.zip

This is my first KeyGenMe. Its not easy, but when you find the code, you will be happy, because it have some functions.
(This is a program i would shareware, but nobody should can make a keygen :-)

NOTE: Every Computer have another code.

When you submit the solution, make a screenshot from the program.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 31. Jul, 2008
Downloads: 181

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Send a message to n0ise »

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Discussion and comments

N00bCPP Author 31. Jul 2008	Achja, und bitte schreibt in die Lösung den Code aus der reg.txt mit hinein.Und natürlich euren Code. (Nur so kann ich sagen ob ihr einen richtigen Code habt.
TiGa 31. Jul 2008	English please.
Ox87k 31. Jul 2008	TiGa, the whole crackme is in german language, i don't understand anything! @.@'
MACH4 31. Jul 2008	Same here! Just 'good' and 'bad' strings would have helped
TiGa 31. Jul 2008	Movo El Eaxo,1 would be Spanish asm... What is it in German asm? Möven Von Eaxsthüng,1 ? Come on, some crackmes don't even have strings at all. That's even worse than having non-english strings.
MACH4 01. Aug 2008	well this is the above text translated into that wonderful Bablefish dialect quote* Achja, and please writes the code from reg.txt into the solution also. And naturally your code. (Only so I can say whether her a correct code have. *unquote
N00bCPP Author 01. Aug 2008	Thanks @ MACH4 I mean the code in the reg.txt, the long nummer. This and your code please put in the solution. And of course the keygen. When you probe a code, every ask must be answer whit a 0(zero). Thanks
N00bCPP Author 04. Aug 2008	So, i maked another KeyGen in English. It works like this one, but the algoritm is a little bit other.

n0ise's KeygenMe #1 - n0!se^B!

Download kg1_n0se_b.zip, 21 kb (password: crackmes.de)
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KeygenMe medium difficulty with cool serial routin

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 13. Jul, 2004
Downloads: 761

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Solutions

Solution by xyzero, published 18. jul, 2004; download (24 kb), password: crackmes.de or browse.

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Solution by m@rio_crk, published 17. jul, 2004; download (8 kb), password: crackmes.de or browse.

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n0ise's KLeygenMe 2 n0!se

Download KeygenMe_2-n0!se.zip, 10 kb (password: crackmes.de)
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+ Anti-Debug
+ UPX

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 11. Aug, 2004
Downloads: 1679

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Solutions

Solution by Plasmator, published 15. aug, 2004; download (22 kb), password: crackmes.de or browse.

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Solution by TaGaDaPaF!, published 11. aug, 2004; download (24 kb), password: crackmes.de or browse.

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n)0(va's crackme v3

Download n0va_crackme3.zip, 5 kb (password: crackmes.de)
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disabled controls, serial (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 09. Feb, 2001
Downloads: 1347

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Solutions

Solution by deuce, published 09. feb, 2001; download (4 kb), password: crackmes.de or browse.

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n)0(va's crackme v9

Download n0va_crackmev9.zip, 10 kb (password: crackmes.de)
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nag, timers, serial (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 02. May, 2001
Downloads: 1480

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Solutions

Solution by EsKiMo, published 18. jan, 2006; download (42 kb), password: crackmes.de or browse.

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Send a message to N1ghtm4r3 »

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Discussion and comments

EsKiMo 20. Jan 2006	I busted another fossil.
DeepBlue 20. Jan 2006	EsKiMo the fossil-cracker. :> Please go on! Just wanted to say that i like reading your work ;)

Cooty125 12. Mar 2011	I Crack It! But I do not know how to make a keygen :(
Kingstaa 14. Mar 2011	There is implementation of Base64 so after 6 char you have to == For example: 123456== Next procedure for VolumeInformation, where it grab the serial number of Drive ;) working on it.
N1ghtm4r3 Author 17. Mar 2011	Good job m@rio_crk :)

N1ghtm4r3's KeygenMe2

Download KeygenMe2.zip, 29 kb (password: crackmes.de)
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No patching!
Valid solution is only a keygen+tutorial ;)

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 25. Feb, 2011
Downloads: 387

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by m@rio_crk, published 08. apr, 2011; download (66 kb), password: crackmes.de or browse.

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Discussion and comments

SFeS 28. Mar 2011	Question: first step in keygenme2 - MD5 name. But! MD5 with catch. For example: in implementation of the MD5 algorithm find constant T1..T64, valid value (RFC1321) T6 - 4787C62A, in keygenme2.exe - 4778C62A; T13 - 6B901122 versus 6B902211.. Is error? or trick?
HMX0101 28. Mar 2011	Isn't an error, its just a modded MD5 ;)
N1ghtm4r3 Author 07. Apr 2011	I can send my MD5 to you if you've already done the rest.
N1ghtm4r3 Author 09. Apr 2011	Nice work mario ;) Wait for next one !

N1ghtm4r3's KeygenMe3

Download KeygenMe3.zip, 4 kb (password: crackmes.de)
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No patching!
Valid solution is only a keygen ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 23. Mar, 2011
Downloads: 530

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Solutions

Solution by Cafrix, published 07. apr, 2011; download (83 kb), password: crackmes.de or browse.

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Solution by Niverin, published 07. apr, 2011; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

N1ghtm4r3 Author 07. Apr 2011	good work. i suggest you check this out. http://tuts4you.com/download/KeygenMe3.zip.php?view.513
NukeCrack 16. May 2013	My f*****g computer del all keygenme or crackme even when the antivirus is disabled !

N1ghtm4r3's KeygenMe4

Download KeygenMe4.zip, 2 kb (password: crackmes.de)
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No patching!
Valid solution is only a keygen ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 25. Mar, 2011
Downloads: 781

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by robbje, published 07. apr, 2011; download (133 kb), password: crackmes.de or browse.

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Discussion and comments

Beezdul 26. Mar 2011	Ok can i have a little help? I am getting stuck at the part after the check for serial length and that the 7th letter is a dash.
indole 27. Mar 2011	It starts checking the first half of the key and gets each characters position inside a string in the program. It does some math on it to get a sum and then does a similiar thing on the second half of the key. I was able to solve this earlier but haven't written up a tutorial. I enjoyed it as my first crackme. Here are some keys that I generated: 2WAEON-DN2RC5 , EOHK2R-DFCMKE .
Fear2oo0 28. Mar 2011	:), good crackme.
robbje 29. Mar 2011	I liked it so much, that i decided to write a solution :) Enjoy
Borgiman 29. Mar 2011	Yo, really nice KeyGenMe. I will also try to write a keygen. (hope i'll get it :))
Borgiman 07. Apr 2011	i think difficult 2 is still to different for me :P patching & cracking yes, but keygenning not yet :D nice tut robbje
N1ghtm4r3 Author 07. Apr 2011	well done robbje :)
Borgiman 08. Apr 2011	oh god, my english :D i mean difficulty 2 is still too difficult for me :P
Coccinell 19. Apr 2011	i have found : code1 = ( (serial[0] * position(serial[0])) + (serial[1] * position(serial[1])) + (serial[2] * position(serial[2])) + (serial[3] * position(serial[3])) ) * 78 code2 - code1 - 1 = 6486568h code2 = 6486568h + 1 + code1 but i don't success to decode asm code for code2 ! i don't understand this : f7 * 24^5 + f8 * 24^4 + f9 * 24^3 + f10 * 24^2 + f11 * 24 + f12 why ^5, ^4, ^3, etc ? can you help me to understand that ? thanks
robbje 19. Apr 2011	Check again what the asm code does when it calculates the checksum of key[7..12]. It takes the position of the key in the string and adds it to the accumulator, which will get multiplied by 18h (=24d). If you expand this sum, you will see that f7 gets multiplied by 24 5 times, f6 4 times, and so one. Therefore ^5, ^4, ^3...
Coccinell 20. Apr 2011	i have found that : code2 = (((((position(serial[7]) * 24) + position(serial[8]) * 24) + position(serial[9]) * 24) + position(serial[10]) * 24) + position(serial[11]) * 24) + position(serial[12]) code2 = (position(serial[7]) * 24^5) + (position(serial[8]) * 24^4) + (position(serial[9]) * 24^3) + (position(serial[10]) * 24^2) + (position(serial[11]) * 24^1) + (position(serial[12]) * 24^0) i understand now, thanks robbje

N3tRat's BatchOrNot

Download Batch_Or_Not.zip, 80 kb (password: crackmes.de)
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Batch Or Not?
is a diffrent CrackMe Challenge,He Was written on Batch,but compiled 2 exe.
have any idea how 2 crack him?

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 20. Nov, 2006
Downloads: 578

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Solutions

Solution by Ank83, published 25. nov, 2006; download (27 kb), password: crackmes.de or browse.

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Solution by geeko, published 25. nov, 2006; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 20. Nov 2006	Hmm, i know how crack it ;) I have solved... btw, here another batch crackme :p http://www.crackmes.de/users/khattam/khattam_s_what_is_my_password_5
geeko 21. Nov 2006	Is no need to crack. Its self cracking
geeko 21. Nov 2006	Just need to know where to look
Ank83 21. Nov 2006	muhahahahahaha SELF CRACKING ! You are lituraly right, qeeko Regards, Ank83
ProTreeBrain 21. Nov 2006	Its no important, how it be crack. The protection quality is equal to anyway cracking way. If its works, feel free. You have passed it.
geeko 22. Nov 2006	Why the solution waits so long?
kisel 22. Nov 2006	It's really easy!..
N3tRat Author 22. Nov 2006	hi guys.. it shouldn't be hard.. i just never published this kind of cm.. i just wanted 2 see how you will handle with it.. well..some one got the password?
geeko 24. Nov 2006	YEs, I got the password

nagual's Not4Cracking

Download Not4Cracking.zip, 30 kb (password: crackmes.de)
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*XP Only*
This crackme is at least VERY hard.
It is designed to work against SoftIce and IceExt.
The challenge is to type the right Username and registration in the Dialog
that appears after aprox 45 sec.
It uses encryption and it works in cooperation with its WDM driver.
You'll need to run the install file to make it work.
I can't crack it myself, but the question is: can you!

Happy challenge

Difficulty: 8 - *VERY VERY* hard
Platform: Unspecified/other
Language: Assembler

Published: 05. Nov, 2004
Downloads: 987

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by ingsoc, published 08. aug, 2005; download (57 kb), password: crackmes.de or browse.

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Discussion and comments

ingsoc 05. Aug 2005	Should we be getting a MessageBox when the incorrect serial is entered? I'm asking because I see code supporting that kind of "Wrong Serial" message, but it is either never called, or buggy. Btw: This is also the case on a clean machine with no debugging tools installed.
ingsoc 05. Aug 2005	nm - I cracked it.

nait's CrackMe#3

Download CrackMe3.zip, 200 kb (password: crackmes.de)
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Actually this is a KeygenMe, oh well... As you can guess your task is writing a keygen.

A further restriction to it is that you are NOT allowed to use any brute force method to calculate the key.

Oh, before I forget, your solution needn't be able to generate all possible correct keys. As far as I can tell that won't be
possible without a brute force approach.

If you would like to patch, find the one byte patch.

Have fun.

PS.:
I hope this is something which makes up a bit for those disappointed with CrackMe#5

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 10. Sep, 2006
Downloads: 403

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Discussion and comments

badmojo 11. Sep 2006	Solved it. :) Interesting one. The clue wasnt much use, maybe I missed something there, hehe.
nait Author 12. Sep 2006	Which part did you solve? The one byte patch or the keygen? I admit that the hint isn't of any use for the patch or anything regarding the code. It's referring to the key algorithm.
badmojo 13. Sep 2006	I just crafted a key, didnt make a keygen though... Sorry! :)

nait's CrackMe#5 - Shards

Download CrackMe5.zip, 265 kb (password: crackmes.de)
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A little program that came to my mind when I had a stack of work lying around. ;-)

The key routine is pretty simple, so the solution should contain a description of how the protection works and how it could be removed.

Have fun.

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 09. Sep, 2006
Downloads: 509

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Solutions

Solution by D4ph1, published 15. sep, 2006; download (31 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 09. Sep 2006	but... name = 123456 serial = 123456 and... Good job!? If u put the name and the same name as serial (only numbers) u'll have the good boy msgbox!! Maybe this is a little bug =)
nait Author 09. Sep 2006	It's not a bug in and of itself. As I said the checkroutine is pretty crappy, the job is to name the algorithm which is performed on the entered key. Sorry for the vague instructions in the description. I promise a better checkroutine and more clear instructions next time. ;-)
D4ph1 10. Sep 2006	i compile a keygen...but i think something is missing! there can be more than one true serial for a name right?
nait Author 10. Sep 2006	Yes this is correct, don't worry. ;-)
D4ph1 10. Sep 2006	My keygen for now goes into an infinite loop. Its hard to generate big and small letters, symbols and numbers with the appropriate conditions for the sums to be equal!I need more time and peacefull mind... o_0 I hope the solution will be ready soon... :) Great job nait!

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Naumz's Naumz#1

Download crackme2.zip, 93 kb (password: crackmes.de)
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My first crackme - a keygenme. Try to find a valid key for this. No special knowledge required. A few twists here and there.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 11. Nov, 2007
Downloads: 545

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Discussion and comments

tclover 13. Nov 2007	Дракула, это твой чтоли?
Naumz Author 16. Nov 2007	Could you write in english plz?
br0ken 16. Nov 2007	Google translation showed this: Dracula is a typical pre?

NBS's NBS CrackMe #1 (C++)

Download NBS-#1.zip, 40 kb (password: crackmes.de)
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a VERY VERY easy CrackMe. My first. You dont even need to disassemble the exe. Work for one minute.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 23. Aug, 2004
Downloads: 3631

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by Sinok, published 29. mar, 2008; download (3745 kb), password: crackmes.de or browse.

Sinok has rated this crackme as boring crap.

Solution by zombie8, published 01. oct, 2004; download (8 kb), password: crackmes.de or browse.

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Solution by Plasmator, published 24. aug, 2004; download (61 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Sinok 29. Mar 2008	Video solution submitted :D and approved :D
Easle 22. Jun 2009	If this is supposed to be easy, I'm a total loser.. oh well.. my first day :D
Easle 22. Jun 2009	Ok.. it was pretty easy after all :D
KernelJ 23. Jun 2009	Only zombie8's solution gives enough info to crack the src.rar.
vasto 14. Sep 2010	thx, it was funny :)
tinmarino 30. Apr 2015	zombie8's solution is awesome !!!

Necro1337's Berlon

Download Berlon_KeygenME.zip, 13 kb (password: crackmes.de)
Browse contents of Berlon_KeygenME.zip

This is an simple but i think not easy keygenme !

First try crack it and make a keygen :) !

Good Luck and Have Fun !

- Necro

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Unspecified/other

Published: 08. Apr, 2014
Downloads: 214

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Solutions

Solution by Kirjava, published 08. apr, 2014; download (29 kb), password: crackmes.de or browse.

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Discussion and comments

Kirjava 07. Apr 2014	How to make a keygen when there is just 1 password? Or am I missing something? Samples: USERSOME \| 152055C2 USERNECRO \| 152055C2 USERKIRJAVA \| 152055C2
Kirjava 07. Apr 2014	Yes I had missed something. Writing a solution soon.
Necro1337 Author 07. Apr 2014	Oh i fix it, it was buggy :( !
Necro1337 Author 08. Apr 2014	It was updated !
draculaprof 09. Apr 2014	My keygen in python: http://pastebin.com/0vX9zyVj
Necro1337 Author 09. Apr 2014	Nice work kirjava and draculaprof !

Necro1337's Dar1us KeygenME

Download Dar1us_KeygenME_by_Necro.zip, 13 kb (password: crackmes.de)
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Simple keygenme, coded in PureBasic 5.11.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Unspecified/other

Published: 06. Apr, 2014
Downloads: 135

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Solutions

Solution by new_man, published 06. may, 2014; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

botanyaki 06. Apr 2014	How can I resolve special characters?
Kirjava 06. Apr 2014	No way is this a 4. Only took me 30 minutes to make a keygen. Don't have time to write a solution, but if you want to look at the keygen: http://ideone.com/NrjSEX
Necro1337 Author 06. Apr 2014	Nice work Kirjava !
botanyaki 07. Apr 2014	Thank you kirjava.
new_man 08. Apr 2014	i solved it and this is nice and easy btw at the first this look like you destroy the iat so i run the program and pause after window load and then all api was fixed

Necro1337's xPiratE

Download xPiratE.zip, 80 kb (password: crackmes.de)
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Coded in PureBasic 5.11 .

If have any questions or problem write here, but I think this is an easy crack me .

- Necro

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 03. Apr, 2014
Downloads: 202

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Solutions

Solution by new_man, published 08. apr, 2014; download (121 kb), password: crackmes.de or browse.

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Send a message to Nefertiti »

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Discussion and comments

andrewl.us Moderator 04. Apr 2014	basscode: The entire purpose of this website is to document and host the solutions to crackmes, no matter their difficulty. Posting spoilers, claiming things are too easy, and linking externally to images are opposite to what this site wants.
andrewl.us Moderator 04. Apr 2014	(basscode spoiler comment removed!)
new_man 07. Apr 2014	i solved this and sent a guide
zeetrex 19. May 2014	I must go in 'very easy' category.
NeoCortex 18. Jun 2014	new_man: In my opinion that's not a solution, you didn't explain the crackme and more important you didn't understand it. You just searched the memory and got lucky. What about the 1000bit HeapCreate? Why filling up 44bits of memory with 0x00 in the .data segment?
Kirjava 19. Jun 2014	@NeoCortex: You mean bytes. Both the HeapCreate and the memset are quirks of pure basic. I think new_man's solution is quite sufficient considering the simplicity of this crackme.

Nefertiti's nFcrackme1

Download crackme.zip, 31 kb (password: crackmes.de)
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Primitiv crackme in dos-console (fully 32-bit appz

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: Unspecified/other

Published: 13. Apr, 2003
Downloads: 1460

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Solutions

Solution by scarabee, published 18. apr, 2003; download (915 b), password: crackmes.de or browse.

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Nelix's Nelix CrackMe #1

Download Nelix_CrackMe_1.zip, 7 kb (password: crackmes.de)
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OK, here comes my fist crackme:

Rules:
- Get the "Congratulation! Good job!" message
- Write a keygen and/or a crack
- If you write a crack: Write the crack in a .net languange!
- Keygens prefered!

I hope you have fun with this crackme.

Cheers!
Nelix

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 29. Dec, 2010
Downloads: 539

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Solutions

Solution by Cubinator, published 09. sep, 2014; download (310 kb), password: crackmes.de or browse.

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Discussion and comments

ukrandruha 19. Jan 2011	private string getPassword(string name) { byte[] arrbyt3 = new byte[16]; byte[] arrbyt1 = new byte[] { 15, 58, 143, 50, 67, 61, 164, 53, 35, 244, 178, 60, 88, 93, 77, 23}; string psw = ""; MD5 md5Hasher = MD5.Create(); byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(name)); for (int i1 = 0; i1 < data.Length; i1++) { arrbyt3[i1] = (byte)(data[i1] ^ arrbyt1[i1]); psw = psw + arrbyt3[i1].ToString("x2"); } return psw; }
Zephy 19. Jan 2011	Very interesting. I tried it, but dont win :-) I dont know how write out context of array into string in ilcode. That was problem :-( I'm enjoying to next IL crme :-)))
Nelix Author 23. Feb 2011	OK, solution is here, waiting for a Tut...
Cubinator 09. Aug 2014	I've uploaded a tut, but it is being reviewed by moderators and I don't know how long this normally last.

neoman's crackme #1

Download neo_cm1.zip, 1 kb (password: crackmes.de)
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nag, encrypted

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Jun, 2000
Downloads: 1279

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Solutions

Solution by tscube, published 27. jun, 2000; download (3 kb), password: crackmes.de or browse.

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NeoN's 192bits

Download 192bits.zip, 2 kb (password: crackmes.de)
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In this crack me need find a valid pair - name and serial. Accepted only pair or keygen. No patching allowed.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 01. Sep, 2007
Downloads: 749

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Solutions

Solution by andrewl.us, published 23. sep, 2007; download (154 kb), password: crackmes.de or browse.

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Discussion and comments

ChupaChu 02. Sep 2007	I have basicaly got the idea how it works but havin problems with big and small endians, coz i cant code in asm ;) Anyway it is very nice keygenme, NeoN ! Regards, ChupaChu!
ChupaChu 02. Sep 2007	- no name will work with: 69BD9218A741EC6EED2970D272EFF8C4C3DDBF638F3FC8B0 and all zeros of course ;)
NeoN Author 03. Sep 2007	Good work with "no name" :) But, i expected some name in serial. This crackme is only demonstration, and "all zero" can contain special signatures, license type, etc. Anyway, never mind it, nice work ChupaChu :)
NeoN Author 09. Sep 2007	Anyone else cracked it? I think it's harder than "3 - Getting harder", inho.
Stardust 22. Sep 2007	I have removed all obfusicated code and can see the "real algo". In my opinion it is a RSA-Algo with 192 bits. If the challenge is to calculate the correct serial to a given name, the number ChupaChu shows is the n which must be factorized to solve the problem. Is it possible to factorize such a great number in two primes with standard PC's ? I'm not sure, so I must capitulate at this point. Nice keygenme, NeoN, but it is too hard for me. :( Regards, Stardust
bLaCk-eye Moderator 22. Sep 2007	192bit can be done in ~ 1 min on an ordinary computer.Go get cracking. This could be useful: http://www.boo.net/~jasonp/qs.html Have fun.
Stardust 22. Sep 2007	Thank you bLaCk-eye for the tip. It took 12 seconds on my PC to get the two 29 digits prime out of the n, with this "msieve-tool". I thought factoring is a harder job for a PC, now I'm wiser. I think now it's my turn to write a keygen. :-)

NeoN's Negligent deobfuscate #1

Download negligent.zip, 1 kb (password: crackmes.de)
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I'm writing some kind of exe obfuscator, and this exe is output result of obfuscating by
my program. It contains some trash instructions (very few) and code is "breaked" on small
parts, putted in random parts of exe and connected with jumps :)

Tasks:

- for newbies:
just remove trash and get source code for this exe
- for pro's:
write a program for automated deobfuscation of this exe

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 06. Oct, 2007
Downloads: 494

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Discussion and comments

kao 08. Oct 2007	Sweet crackme! :) However, due to your ugly usage of EBX register and jump to procedure, its almost impossible to write perfect "automagic" tool... I am trying nevertheless... Can I get some more samples for testing? ;)
NeoN Author 09. Oct 2007	kao, now i'm fixing some bugs and rewriting code, so in this moment it don't work :) Will publish some more after 2-3 days of coding
cyclops Moderator 10. Oct 2007	If i were the author of the crackme, i should name it as JUMPER, may be buggy JUMPER..lol...nice crackme!

NeoN's Virt

Download crackmes.zip, 3 kb (password: crackmes.de)
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Written specially for $CC07, but now it's over and you can try it by yourself :)
Based on Virtual Machine, you will need trace it in simple case, or fully disassamble it.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 26. Aug, 2007
Downloads: 572

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by red477, published 01. sep, 2007; download (4 kb), password: crackmes.de or browse.

red477 has rated this crackme as awesome.

Solution by alex_ls, published 07. sep, 2007; download (14 kb), password: crackmes.de or browse.

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Send a message to neotren »

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Discussion and comments

alex_ls 29. Aug 2007	Great work NeoN! I like this crackme, especially the obfuscated VM algo. But you should to increase the opcode table, because I've found the valid string for 2 hours!
NeoN Author 30. Aug 2007	Ok, i'll improve obfuscation and opcode table in next crackme. :) This crack me was made to be cracked in small period of time (2 days maximum), coz it's written as part of big hack quest for Chaos Construstion 2007. %)
Requiem 30. Aug 2007	I'm not agree with that, this crackme is nice like it. Few tricks without being boring. Reversing huge opcode table would simply be a bit annoying and would not lead to more fun. Obfuscation is quite easy to bypass with few patterns to match. Thank you NeoN.
alex_ls 30. Aug 2007	Requiem: I'm agree with you too. Thanks to NeoN for exellent work, this crackme is very cool, but I mean it's not so hard to resolve like for level difficulty-6!
NeoN Author 03. Sep 2007	Nice solution, red477! A expecting such and like to see it :)

neotren's CryptoME

Download CryptoME.zip, 130 kb (password: crackmes.de)
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Your task is to register and be able to play this small game.
The best solution is to make a keymaker but if you cant you might try patching :)

A 100% working crackme/game will have a status like this:

******* found..
******* verification OK
Registered to: <your name>
Key is GOOD for this game :)

and the dialogbox caption will show your registered name.

NEO

Difficulty: 7 - Very hard
Platform: Windows 2000/XP only
Language: C/C++

Published: 07. May, 2008
Downloads: 587

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Solutions

Solution by andrewl.us, published 30. mar, 2010; download (110 kb), password: crackmes.de or browse.

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Discussion and comments

neotren Author 10. May 2008	anyone working on this atm?? Perhaps a comment on the level 5 rating. Is it to hard/easy?
DigitalAcid 11. May 2008	Yeah, i tried it and patching is indeed hard =). I kinda gave up atm. I can't make a keygen anyway.
Zaphod 12. May 2008	It is hard, all right! I can patch it so it says all the above, the "verification" and "GOOD"-stuff, but that doesn't make the program run...
MACH4 12. May 2008	I think the game crashing when its patched is because it isn't finding the information required to run , mainly because of the patching. If that makes any sense! Also patching loses the Registered name (which is a requirement) Might be just as hard to completely patch, as it is to solve it properly! All pivots on the verification call, its a BIG place in there, lol! Wish I had more experience in that direction! Anyway, very nice Crackme, will be most interested to see a tutorial on it... MACH4
DigitalAcid 12. May 2008	I think it's modifying the original code to make the game run, so if you patch, you modify the bytes and therefore it won't run properly. if you patch, there is no registered name anyway =). I can't seem to find where it checks my input with the correct input =). PS: i'm changing the Z or whatever flag, not actually patching and it still doesn't work O.o. Can't wait to see a tutorial either, i think i know wich type of hash it's using.
HMX0101 12. May 2008	Hey ppl, the game need a correct key in order to play the game, this is because that part of the executable is encrypted with AES (this is just a guess ;) and can be decrypted only with a good key ;)
Zaphod 12. May 2008	hmx0101, PeID says 2 versions of RIJNDAEL, SHA1 and 3 versions of Big Number. I am also looking forward to see a solution, though I haven't quite given up yet :)
neotren Author 12. May 2008	Hi, HMX0101: Your guessing is correct but it's solvable. I just talked to a friend and he might think that the rating is a bit low and rated it like 7-8.
HMX0101 13. May 2008	Zaphod, if you've IDA you can use CryptoSig by Cauchy to see what's going on with Bignums... ;) I'll be taking a look closer, later :D
TaGaDaPaF! 30. May 2008	Is it solvable without knowing the modulus factors ?
neotren Author 31. May 2008	TaGaDaPaF!: No (I really hope not :))
TaGaDaPaF! 02. Jun 2008	Are we supposed to factor the modulus with the given informations contained in your crackme (without spending 100 years of computation) ? I don't see any backdoors to factor it -- maybe i'm not looking deep enough
MR.HAANDI 02. Jun 2008	How came that I oversaw this nice crackme? Yes, finding the group oder of the field does not see obvious, lets see...
neotren Author 02. Jun 2008	TaGaDaPaF!: There should be a faster way :) Look deeper.
MR.HAANDI 03. Jun 2008	Are you saying that if one looks deeper, one can find the factorization or are you saying that if one looks deeper, one can find a way without the (full) factorization?
TaGaDaPaF! 03. Jun 2008	You need one of the non trivial factor in you license file. Anyway its beginning is the AES key
neotren Author 03. Jun 2008	MR.HAANDI: I say you can find a way to factor. The AES part is only implemented to make it "impossible" to crack and RSA part is to make it look "impossible" to break. When you have the AES key you have 90% of the information you need to make a keymaker so plz dont patch it.
neotren Author 01. Aug 2008	Anyone working on this atm?
DigitalAcid 01. Aug 2008	Not me. It's way above my league, even though i know most of the stuff you mention =).
neotren Author 02. Oct 2008	Perhaps some one with more crypto experience could have a look at it? Perhaps level 5 is a bit low on this one? Can any one comment on that?
neotren Author 07. Jun 2009	one year and no solution? :) Need any help?
neotren Author 16. Aug 2009	First small hint: ASProtect SKE :)
VaZoNeZ 17. Aug 2009	Can I pack/protect my Crackme with a commercial protector even if it is free? No. The only packers/protectors allowed are those that you wrote yourself. This website is not meant to be a place where commercial protectors are disabled for you by other reverse code engineers.
neotren Author 17. Aug 2009	VaZoNeZ: Did you think that the hint was for which packer that was used? The hint is for factoring the modulo. Nothing from asprotect ske is used here. Even the algo is home made. (The packer itself is made by me)
neotren Author 15. Sep 2009	Hint 2: The modulo used in the RSA part is also used in the signature algo. You can assume that the modulo n = pq where p and q is prime numbers. When you look at the signature size you can also assume that the order of g != phi(n). Now since n is a multiplicative group you know that Zn depends on Zp and Zq. Also g^(p-1) == 1 mod p and g^(q-1) == 1 mod q and g^((p-1)(q-1)) == 1 mod n. When the order of g != phi(n) then there might be a subgroup to work in?? Perhaps you can use this info to factor n??? So when you have p and q you need to solve DLP in Zpq and Zqq, use CRT and you should have all the info you need to make a keygen to this crackme. Also using same p and q you should be able to obtain rsa d.
andrewl.us Moderator 15. Sep 2009	if g is the generator of some subgroup of order q-1, doesn't g^((q-1)k)=1 for any integer k? (vs. specific case that you mention g^((q-1)(p-1)) How do you read "Zpq" and "Zqq"?
artif 15. Sep 2009	I found the way to factor it I think ...
neotren Author 15. Sep 2009	andrewl.us: yes g^((q-1)*K) == 1 mod q. When I wrote Zpq and Zqq I was referring to that there is a subgroup q in Zp and there is also a subgroup q in Zq. I see now that this could mess thing up so what I meant is that there is a subgroup q1 in Zp and there is also a subgroup q2 in Zq. (q1 is a prime factor of p-1 and q2 is a prime factor of q-1).
andrewl.us Moderator 16. Sep 2009	finding the size of the hinted subgroup still seems infeasible...only thought to try is assume one of big numbers 016B2835(etc.) or 017A1EB5(etc.) generates the group, but finding its order (and thus the size of the group) is as hard as factoring - not asking for more clues, let's keep the challenge a challenge :) go go artif :)
artif 16. Sep 2009	yep let's keep the challenge ;) too much hint now ... :D
neotren Author 28. Sep 2009	artif: Any luck factoring? :)
neotren Author 11. Feb 2010	New hint: There is a factoring algo called p-1. Perhaps modifying it might solve the problem.
andrewl.us Moderator 12. Feb 2010	are you certain the subgroup is so evident? your signature scheme is nearly Schnorr: e = (4 bytes) s = (7 bytes) g = 17A1EB... y = 016B28... you compute: r_v = g^s * y^e (mod N) e_v = hash(m \|\| r_v) (mod 0xFABF1234) (must match e) - the size constraints on e and s are really confusing - am assuming you reduce e_v by that composite just to reduce it to 4 bytes (the range of e) ? have tested all g^exp (mod N) for 32-bit exp and got neither 1 nor y... am scared that your s (the 7 byte) is reduced (mod q) (like in Schnorr) and q is the subgroup size... would be way too large a search space if you could answer questions as minimally as possible (fewest clues)
neotren Author 14. Feb 2010	e is just the hash here and is not important. however s is which is the signature. You can look at the sig to determine the size of the group. (sub group) So as you say. sig size is 7 bytes max then you know the order of g in N should be ~same size. So 7 bytes order gives you max 56 bit. So now try to look at the problem in Zp and Zq. The order of g in Zp or Zq can be like 56/2 bit. Using the properties of g and the algo Pollard's p-1 might sole the problem :) Look at the alog p-1 and you will see it all clear then. (oh and you should not need to search all the way up to 32 bit :))
neotren Author 11. Mar 2010	any luck using Pollard's p-1?
Xspider 02. Apr 2010	c0ol you did it man :D
andrewl.us Moderator 03. Apr 2010	only with alot of help/hints :) cool to learn about pollard p-1 though - hopefully neotren will write more fun things
Xspider 03. Apr 2010	but you did it anyway ;)
neotren Author 10. Apr 2010	Nice job. And now for next challenge is to fly and land your ship at the base :)

l0calh0st 09. Jul 2006	It's in Delphi not in Assembler :P
HMX0101 10. Jul 2006	@l0calh0st: That's true :D Easy crackme, the bad of encrypted password is that in some moment the hardcoded password is decrypted :)
Nevyn Author 10. Jul 2006	Ah yes, At the time i made the post i forgot to change it the language, And when i noticed my selction it was already to late :P
zairon Moderator 10. Jul 2006	No problem, it has the right language now :)

ChupaChu 26. Mar 2009	my guess is 10734633 is universal key for every name?
WarRock 26. Mar 2009	lol that is true :D
DigitalAcid 27. Mar 2009	So, how are you supposed to keygen it then :P ?
obnoxious 28. Mar 2009	ooooooo nice one @ DA. BTW long time no see.
WarRock 28. Mar 2009	who can make a tut?
pinku 30. Mar 2009	Hey new Hitman .. U r a part of astatalk ??? rn't ya.
WarRock 30. Mar 2009	who can make a tut
NewHitman Author 31. Mar 2009	Yeah I'm a part of astatalk comunity Warrock i guess you too so wait for a tut soon
WarRock 31. Mar 2009	thats nice to hear thx :)
NewHitman Author 01. Apr 2009	Well warock When you meet these cases you should use DeDe the best tool to dissamble delphi projects
WarRock 01. Apr 2009	i cant understand full the damn algo ok! so need tut
laconix 02. Apr 2009	Thanks for the hint about DeDe, I had never heard of it before.
NewHitman Author 02. Apr 2009	No problem,Warockdo you want it here or there
WarRock 02. Apr 2009	yes i want it :) plz mate
john134 12. May 2009	ok, i solved all algorithms. it was nice :) i'm too tired to write a tut now. maybe sometime
WarRock 29. Jul 2009	hmm i suck on level1 key someone can give me a small help but just a hint plz :)
cysto 02. Oct 2009	Here is a .NET keygen that I made, works perfectly! http://www.mediafire.com/?jzt1jzjoxmx Too small!

NewHitman's NewHitman's KeyGenMe#5

Download KeyGenMe#5.zip, 620 kb (password: crackmes.de)
Browse contents of KeyGenMe#5.zip

Well this time I came with another release by me of course it is not easy as the previous one any way give it a shot and try to solve it

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 29. Mar, 2009
Downloads: 766

Rating

Votes: 4
Crackme is boring crap.

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Solutions

Solution by asterix, published 14. jul, 2009; download (5 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

the hoax 29. Apr 2009	This is level 1. Only math knowledge you need is "addition".
NewHitman Author 07. May 2009	Well you said that because you are not newbie
WarRock 07. May 2009	if its so easy do a tut
NewHitman Author 09. May 2009	WarRock I made a tut on how to find a suitable serial for any name check Asta Forum
spydevil 20. Jul 2012	i cant understand, please add video tutorial :\|

Solution by zorex, published 29. jul, 2015; download (5 kb), password: crackmes.de or browse.

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Solution by draww, published 29. jul, 2015; download (38 kb), password: crackmes.de or browse.

draww has rated this crackme as boring crap.

Send a message to nezlooy »

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Discussion and comments

mrmacete 16. Jul 2015	internet is for... KITTEN
acruel 18. Jul 2015	Happy Halloween!
andrewl.us Moderator 29. Jul 2015	Four solvers! You did it broughhhs!! :D High five dudes! :D
specx 23. Feb, 12:26	nice one dude :)

nezlooy's ESET VMTest

Download vmtest.zip, 7 kb (password: crackmes.de)
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Need to find the key that will decrypt the stored text.
zip-pass: infected

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 03. Jan, 2013
Downloads: 313

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by neo85, published 04. feb, 2013; download (80 kb), password: crackmes.de or browse.

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Discussion and comments

neo85 08. Jan 2013	"ESET keeps you safe while working, playing, and more." "ESET keeps your business running safe and mega secure" Very interesting stack machine :) What is the duration of this ESET task-test?
neo85 08. Jan 2013	Oops, I mean "What is the duration of this "test-taks" :)
mausy131 08. Jan 2013	Result: Kset Is that right?
SFeS 08. Jan 2013	#mausy131 Key right. You forgot to add a dot (.) to the end of the key. Nice challenge :)
nezlooy Author 09. Jan 2013	Yes, that's right (and "Key" and "Result"). :) All many thanks for the solution!
nezlooy Author 09. Jan 2013	2 neo85 > Oops, I mean "What is the duration of this "test-taks" Unfortunately, 1 level only :(
andrewl.us Moderator 09. Jan 2013	neo85: please submit solution - otherwise your comment is just a spoiler!
redoC 28. Jan 2013	Offtopic: 17 solutions in queue ? ...moderators should wake up

nguyen vinhson's CrackmeVS5

Download crackmevs5.zip, 14 kb (password: crackmes.de)
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Patching Allowed

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 03. Nov, 2002
Downloads: 850

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nguyen vinhson's Crackme 3

Download crackmevs3.zip, 11 kb (password: crackmes.de)
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Scrollbars and colors / Pass

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 10. Oct, 2002
Downloads: 749

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Solutions

Solution by kahel, published 21. oct, 2002; download (4 kb), password: crackmes.de or browse.

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nicefahrrad's NiceFahrrad: UncrackableMe? (OnlineSerial)

Download UncrackableMe_by_NiceFahrrad.zip, 13 kb (password: crackmes.de)
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This CrackMe checks online for the Serial,
Can you crack this anyway?

This is my first CrackMe i have made,
its written in .NET (nothing special),
You need to get the Message that you have the right serial entered!
I hope you enjoy it and dont fucked up by the anti debug mechanisms ;).
I would love to see a tutorial video answer.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 10. Dec, 2015
Downloads: 286

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Solutions

Solution by HoLLy_HaCKeR, published 09. feb, 2016; download (25 kb), password: crackmes.de or browse.

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Solution by haboustak, published 09. feb, 2016; download (1 kb), password: crackmes.de or browse.

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Solution by acruel, published 09. feb, 2016; download (7 kb), password: crackmes.de or browse.

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Send a message to NickFnord »

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Discussion and comments

acruel 13. Dec 2015	Are you sure the hostname "nicefahrrad.ddns.net" is resolvable? acruel$ ping nicefahrrad.ddns.net ping: cannot resolve nicefahrrad.ddns.net: Unknown host acruel$
givses 15. Dec 2015	-1 for not linking against framework 4.
HoLLy_HaCKeR 19. Dec 2015	cannot resolve, I assume I just have to fix it and make it appear? (like when an old program's website is down)
elmasmalo1 20. Dec 2015	the host is definitely down (a ping to the host can show proof of this), so there's no way to actually check for serials or decide whether you can crack this or not, other than you can make a patch that will lead to an obvious cracked program but given the fact the host is down, it's obviously uncrackable which is non-sense. Anyways, if the program would be working correctly, the program would send your computer name to the server and then when it's going to check for serial it will send another string as follow: "CheckSerialyourserialhere", where you see 'yourserialhere', it's the actual serial you're writting into the program, the program then sits on a Listening loop waiting for a response so then the program would then return a string from the server checking whether your serial was correct or wrong, the string will be located in a RichTextBox that is not visible if the text from the RichTextBox is changed (waits for such event), meaning that we got a result from the server then the serial check routine begins, if your serial was correct you would get a string returned from the server as follows: "yourcomputernamehererightserial" where you see 'yourcomputernamehere' is your actual computer name that we sent eariler, at this time the checking routine does other checks also, but skipping that... else if the returned string is: "yourcomputernameherewrongserial*" you will get an error message, now the routine check is done and we how to successfully crack the software.
acruel 21. Dec 2015	True. I set up a local server to show the good-boy message.

NickFnord's NickFnord's Keygenme #1

Download NickfnordGenme1.zip, 36 kb (password: crackmes.de)
Browse contents of NickfnordGenme1.zip

/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
An experiment in obfuscation - by Nick Fnord
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\

Date: 24-Jan-2009
Program Type: Consol application
Crackme Type: KeygenMe/Analysis
Difficulty Level: I think this is a 3 or 4 but as it's my first
crackme I'm unsure.
Programming Language: C++ with a bit of inline ASM
Platform: Only tested on WinXP but as I have included the
DLL's statically it should run on anything that
supports the PE format.

Hi All,

This is my first crackme. I made it as an excercise in obfuscation and also
to experiment with some various anti-debugger techniques. I don't think there
is a plug in to olly that successfully takes care of all the methods I used,
but if there is, I'd be interested to know about it.

The application will ask for a username and password, and if correct will
display a fairly well known poem.

Task One:
---------
Your Primary task is to write a Keygen program for it. You are permitted to
do whatever you like to the original program.

Task Two:
---------
Write a tutorial detailing how you went about making the keygen. Ideally,
Describe the program in High-level pseudo-code or in words, identifying all the
anti-debugger methods used.

Hope you have many hours of enjoyment from this one.

Cheers!
Nick (NickNOSPAM[at]nickfnord[dot]com)

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 24. Jan, 2009
Downloads: 331

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Solutions

Solution by exevf, published 18. feb, 2009; download (54 kb), password: crackmes.de or browse.

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Send a message to Nicohogtag »

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Discussion and comments

shellwolf 25. Jan 2009	shellwolf FPGVQJCCI is this right?
shellwolf 25. Jan 2009	keygen=sub_401150
NickFnord Author 25. Jan 2009	yep - now go keygen it. perhaps it should have been a lvl 2 - the rankings are so arbitrary that it's difficult to pick sometimes.
NickFnord Author 25. Jan 2009	I'd also like to add that there is a plugin that takes care of all of these - I stand corrected :-D
shellwolf 26. Jan 2009	Anti-tricks and algo is good.but it is easy to find sn in the memory.because ur algo is sn=algo(name). if algo is name=algo(sn), or algo1(name)=algo2(sn),it will more diffcult.
schlumpf 28. Jan 2009	I met a traveller from an antique land Who said: Two vast and trunkless legs of stone Stand in the desert. Near them on the sand, Half sunk, a shatter'd visage lies, whose frown And wrinkled lip and sneer of cold command Tell that its sculptor well those passions read Which yet survive, stamp'd on these lifeless things, The hand that mock'd them and the heart that fed. And on the pedestal these words appear: "My name is Ozymandias, king of kings: Look on my works, ye Mighty, and despair!" Nothing beside remains: round the decay Of that colossal wreck, boundless and bare, The lone and level sands stretch far away. I like.

Nicohogtag's CrackMe by Nicohogtag

Download Crackme_by_Nicohogtag.zip, 10 kb (password: crackmes.de)
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This crackme was written in visual Basic 6, your goal is to have a message box appear saying, "Congrats, you got the password right!".

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 23. Mar, 2011
Downloads: 490

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Discussion and comments

Jocher 25. Mar 2011	I Uploaded The Solution I Hope That's Correct See You Later
Nicohogtag Author 16. Apr 2011	I never got your submission Jocher
Kingstaa 16. Apr 2011	Difficult 2 is really much for this one. It is not even 1. 004029EB ---- nop thats it.
idid231 16. Apr 2011	What is the rules man? if only patch, it's not level 2 :) For find serial, i don't see what is real serial, it's "blank" when i paste in textbox, it's said "Please enter a password" :D
Nicohogtag Author 16. Apr 2011	Are you guys using ollydbg?
idid231 17. Apr 2011	oh yes, i only know olly :D but what's problem? :-/
Nicohogtag Author 19. Apr 2011	Which program are you guys that say its easy using?
idid231 19. Apr 2011	I don't really understant your question. I always use olly, but with vb, first i use vbstr to fish it, if don't have any good result i use olly, never use smartcheck and decompiler
Nicohogtag Author 20. Apr 2011	I haven't heard of vbstr, is it a program or a dll addon to olly? Download link?

Nicohogtag's KeyGenMe#1 By Nicohogtag

Download KeyGenMe#1_by_Nicohogtag.zip, 11 kb (password: crackmes.de)
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This is one of my first KeyGenMe's that I have made in Visual Basic 6.0. Your goal is to make a valid keygen for this.

Rules:
*No Patching
*No Brute Forcing
Keygen is the only valid solution for this.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 28. Apr, 2011
Downloads: 547

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Solutions

Solution by negux, published 11. feb, 2012; download (200 kb), password: crackmes.de or browse.

negux has rated this crackme as quite nice.

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Discussion and comments

promix17 28. Apr 2011	Is selfkeygen is allowed?
Nicohogtag Author 29. Apr 2011	Your goal is to make a working keygen for this using any method, thats all. I also forgot to mention include a tutorial on how you did your solution for others to learn.
Arttomov 06. Aug, 18:52	3038-3892-3456-2610 Arttomov

Nicohogtag's Keygenme #2 by Nicohogtag

Download Keygenme_#2_by_Nicohogtag.zip, 150 kb (password: crackmes.de)
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This is my first Keygenme that I have made in C++. Your goal is to make a valid keygen for this.

Rules:
*No Patching
*No Brute Forcing
Keygen is the only valid solution for this.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 14. Feb, 2013
Downloads: 540

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by vigilanz, published 28. apr, 2013; download (75 kb), password: crackmes.de or browse.

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Solution by promix17, published 20. feb, 2013; download (74 kb), password: crackmes.de or browse.

promix17 has rated this crackme as boring crap.

Send a message to Nieylana »

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Discussion and comments

Nicohogtag Author 14. Feb 2013	Oh and leave a tutorial for others to learn.
promix17 16. Feb 2013	Wait a tutorial
promix17 17. Feb 2013	It seems to be a buffer overflow solution yet
Nicohogtag Author 20. Feb 2013	Good job promix17
d2t3xzer 24. Feb 2013	newbie here, tuto pls
Nicohogtag Author 26. Feb 2013	Its in promix17's solution zip

Nieylana's Nieylana's KeygenMe #2

Download TheKeygenMe.zip, 12 kb (password: crackmes.de)
Browse contents of TheKeygenMe.zip

This keygenme was developed to demonstrate to the community it's not all about the heavy crypto's that are used, but rather how they are implemented, this keygenme has no heavy crypto's in it. See if you can solve it!.

Serial Fishing is not a valid solution, nor is Patching, only a Keygen.

Note: That Crashes are NOT a programming error, this keygenme has been tested on XP/Vista/Windows 7 and all is in working order.

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 20. Aug, 2009
Downloads: 222

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Solutions

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Discussion and comments

andrewl.us Moderator 06. Dec 2010	trying to approve a solution here, but the crackme exits whether I enter good serial or bad - any ideas Diabolito, Nieylana? crackme is not indicating whether serial is accepted or not
Diabolito 07. Dec 2010	I missed something, didn't test on but one machine and OS. will fix and re upload.

niftybitz's crackmeister v.1

Download nifty_crackmeisterv1.zip, 1 kb (password: crackmes.de)
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password

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 14. Mar, 2002
Downloads: 973

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Discussion and comments

pants 09. Apr 2006	If you enjoy ZeroCoder's crackmes you'll probably like this - many solutions. Fun crackme, thanks niftybitz.
ZeroCoder 23. Apr 2006	oh... 2002 year... hmm... need solved :))

niftybitz's test

Download nifty_test.zip, 6 kb (password: crackmes.de)
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serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. Jul, 2001
Downloads: 960

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nilbytes's VM CrackMe 1

Download CrackMe.zip, 30 kb (password: crackmes.de)
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A starter VM CrackMe for OS X with self-modifying code. Keygen solutions or valid name/code combinations desired.

Difficulty: 4 - Needs special knowledge
Platform: Mac OS X
Language: C/C++

Published: 09. Feb, 2012
Downloads: 349

Rating

Votes: 3
Crackme is good.

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Solutions

Solution by mrmacete, published 01. dec, 2014; download (13 kb), password: crackmes.de or browse.

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_ninar1_'s _ninar1_'s crackme 1

Download crm1ninar1.zip, 1 kb (password: crackmes.de)
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The german secret service intercepted an email to an espionage team.
But painfully the message resist in an executable.
The message can only be read,if you know the spions names.

Get as much info u can get !!!
====================================
Der deutsche Geheimdienst hat eine E-mail an ein dreiköpfiges Spionageteam abgefangen.
Leider ist die Nachricht in einer auszufuehrenden datei.
Die Nachricht kann aber nur gelesen werden ,wen man den richtigen Agentennamen weiß !
====================================
about time to solve:
10-15 minuten resolve all infos

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 31. Oct, 2008
Downloads: 566

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by main, published 07. nov, 2008; download (1581 kb), password: crackmes.de or browse.

main has rated this crackme as quite nice.

Discussion and comments

nkcss 02. Nov 2008	I'm kind of stuck, I found out that the sum of the numeric values of the first 4 characters (\r\n are countede if less then 4 chars are inputted) that you input have to hadd up to 0x129. After that, I saw a jump and a compare eax to 'O', but got lost there. The program doesn't say 'wrong user', but nothing is outputted. My input: ZkW Any pointers are appreciated.
main 02. Nov 2008	I´ve solved it now. In my solution I have 4 chars anyway. There are a xoring with 4 predefined dwords, look for that and keep the xor in mind then you´ll solve it. And keep the endians in mind! :)
main 02. Nov 2008	Sorry, I must´ve been drunk when I wrote that above :) Of course, there are 3 names and they decrypt dwords that correspond to the entire message. I got 2 of 3 now, but soon I´ll have the third.
main 02. Nov 2008	Now I´ve found the third name :)
main 02. Nov 2008	But this one does not take 10 min. It takes at least 20 mins I think, if you don´t already know what to look for of course.
user2k 02. Nov 2008	the bomb will kaboom in 2009 so u got more time than 15 minutes :)
main 02. Nov 2008	Hehe, dull germans. Probably the girls fault :) I´m working on solution, but the problem is I´m looking for a nice function to convert dword to string. PBYTE does it for now, but there should be nicer solutions to this. Do you know any such function? I don´t like ugly code... :)
main 02. Nov 2008	Hmm, It seems that printf("%s", (char*)&a_dword) does the work too :)
user2k 10. Nov 2008	main: if string is above or equal 4 bytes u cant use ptr to dword because of 0x00 at end. printf never ends printing a nonended string. btw nice solution
main 12. Nov 2008	Yes, that is correct. That is why i added the terminatng character in my solution. Bu anyway, is there a better way to this (print dwords)? Thanks!
~misunderstood~ 13. Nov 2008	@_ninar1_ nice one, I liked the "little story" behind it a lot..it took me about 40 minutes to solve it ;)
itsho 13. Nov 2008	@main: love you solution !. thank you. @_nirar1: how come you file is so so small ? did you actually wrote the whole thing in ASM ?
main 14. Nov 2008	@itsho: Thanks! Keep on coding! :)

nivel's Crackme 1 by nivel

Download nivel#1.zip, 48 kb (password: crackmes.de)
Browse contents of nivel#1.zip

Reverse the algorithm and make a keygen
No patching

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 23. Nov, 2004
Downloads: 899

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Solutions

Solution by JJtRvXX, published 26. nov, 2004; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

nivel's Crackme 2 by nivel

Download nivel#2.zip, 3 kb (password: crackmes.de)
Browse contents of nivel#2.zip

Patch two nags and make a keygen.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 02. Dec, 2004
Downloads: 3509

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Solutions

Solution by Oorja-HalT, published 14. dec, 2004; download (45 kb), password: crackmes.de or browse.

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Discussion and comments

ideku_nih 18. Apr 2012	to patch 2 nags is more difficult than algo goes with vbdecompiler.

nivel's Crackme 3 by nivel

Download nivel#3.zip, 48 kb (password: crackmes.de)
Browse contents of nivel#3.zip

You have to unpack it and find the correct serial. It includes some encryption. Read the info file for more information.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 05. Dec, 2004
Downloads: 1409

Rating

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Solutions

Solution by Oorja-HalT, published 09. dec, 2004; download (12 kb), password: crackmes.de or browse.

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Solution by WiM, published 09. dec, 2004; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

nivel's Crackme 4 by nivel

Download nivel#4.zip, 82 kb (password: crackmes.de)
Browse contents of nivel#4.zip

Unpack it and stop the time-trial. Read the info file for complete rules and tips.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 14. Dec, 2004
Downloads: 1548

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Solutions

Solution by Oorja-HalT, published 28. dec, 2004; download (50 kb), password: crackmes.de or browse.

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Discussion and comments

nlxx's CrackME 1

Download crackMe.zip, 302 kb (password: crackmes.de)
Browse contents of crackMe.zip

Hello every one. This is my first crackMe. So go easy on me :P
Written in C.
Need to find out the special password.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 29. Jan, 2014
Downloads: 912

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Solutions

Solution by albertus, published 19. feb, 2014; download (1 kb), password: crackmes.de or browse.

albertus has rated this crackme as nothing special.

Solution by iphelix, published 19. feb, 2014; download (4 kb), password: crackmes.de or browse.

iphelix has rated this crackme as quite nice.

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Discussion and comments

BureauAnon 30. Jan 2014	doing it, but one thing I noticed, putting it through virustotal tells me this was last scanned back in 2011 so is this an old one? https://www.virustotal.com/en-gb/file/52e69cbd6487eb8abc35bcf4e76da91a266eda5aaa08f9a14595da4d3c211b63/analysis/ , checked with shasum -a 256
Delirium 03. Feb 2014	That is odd man. I check it though exactfile, and you're right.
evaboy 04. Feb 2014	@delirium: stop the joke. Though it is freaky by date, you can solve it and let other newbies learn, if you can solve it.
Code4 06. Feb 2014	ok here is the password is : 0a0a0a01a0a0
ronakai 07. Feb 2014	you can need a brain to make proper crack me.What the hell is that?
neolithicLoser 10. Feb 2014	Ok the string that works is 'abxbxahzzc' now try different a b c, it will work
wk747160737 25. Feb 2014	some letter cannt change。 one answer is ayxbxahzzj
Confocus 25. Feb 2014	I got letters "x hax b zz ",but how to array them?
lonestar 05. Aug 2014	Enter the password: abxbxahzzl You typed "abxbxahzzl", checking.. Success! The password is xbabxbazzhax

Noble's easy CrackMe

Download easy_CrackMe.zip, 58 kb (password: crackmes.de)
Browse contents of easy_CrackMe.zip

first CrackMe submitted by me so take it easy......

no Anti-Reverse Engineering modules were used, just few tricks to nag u :)

good luck

TASK: Just find the password , a message will appear if u got the correct pass , otherwise it will exit

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 03. Sep, 2009
Downloads: 572

Rating

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Solutions

Solution by rotorooter, published 04. sep, 2009; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

nobody's Blaad

Download blaadme.tar.gz, 12 kb

Hi.
Sono blAAd!.
Per questo crackme bisogna trovare un seriale(la criptatura è semplice).
E' in stile Window$ (messagebox, edit line varie...).
Per creare il crackme ho utilizzato le librerie Qt 1.44
(richedono esclusivamente la programmazione in C++),
e sono fortemente utilizzate dal Desktop KDE
(e quindi compatibili con la stragrande maggioranza delle versioni Linux).
Nient'altro da dire. Spero qualcuno tenti di risolverlo. Io non ci ho ancora provato!!!!:P

Bye by blAAd! a tutti i membri UIC & Racl & SuddenDischarge....

info:: blaadeleng@yahoo.com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Unspecified/other

Published: 18. Jan, 2005
Downloads: 704

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Solutions

Solution by 0xf001, published 27. jan, 2005; download (10 kb), password: crackmes.de or browse.

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redoC 16. May 2014	What version of MPIR is used?
noobpwnftw Author 16. May 2014	MPIR 2.2.1, the last version that supports vc9.
redoC 18. May 2014	exponent 0x10003 is intended?
noobpwnftw Author 18. May 2014	Yes, 0x10003 is chosen on purpose.
redoC 19. May 2014	Is here anyone good in RSA crypto mathematics? Here is full algo. I have no idea how to solve it... bigNamehash = SHA512 (Name) bigNamehash &= 0x0FFFF... // high 4-bits zeroed, this can be clue? ========================= 0044A5EF_Button_Request: p = gen. random 256-bit prime q = gen. random 256-bit prime N = p * q F = (p-1) * (q-1) D = gmpz_invert (0x10001, F) // private key D ^= bigNameHash // xor big1 = gen. random 256-bit prime big2 = gen. random 256-bit prime big3 = big1 * big2 // required condition: D < big3 big4 = pow (D, 0x10001) mod big3 szRequestNumber = ToHexString (N, big3, big4) // concatenation of three 512-bit numbers ========================= 0044A332_Button_Check(): good_boy if: bigNamehash = pow (bigAnswer, 0x10003) mod N // 0x10003 is not error ========================= ...so we have these numbers N, big3, big4, bigNamehash and we should construct number bigAnswer
Encrypto 21. May 2014	mmm I gave this a quick overview, however I only found relevant material in regards to GnuPG's implementation of choosing e, and in the potential weaknesses involved in exposing a (32) bit factor of (p-1)*(q-1). I would be very interested in seeing a solution, as I do not have much time to dedicate towards this myself :(
noobpwnftw Author 27. May 2014	alright. so as the analysis by redoC, there are 2 rsa moduli involved, D^hash is encrypted by big3, result is big4. In order to retrieve D you need to factor big3, then use D to factor N, calculate another D with 0x10003 and encrypt namehash, then you have good boy answer. all conditions and high bit masks are used to fulfil 1<plain<N for rsa to work.
redoC 28. May 2014	Factoring 512-bit number is not possible within 5 seconds. Give us more hints. Different generation of big2 plays a role?
noobpwnftw Author 29. May 2014	Yes, big2 is preditable.
s3Rious 10. Jun 2014	Great job redoC! :)
noobpwnftw Author 11. Jun 2014	For redoC's solution, I think it is better to use a table for big2 as the RNG is reseeded in every loop with the value of rand(), there can only be RAND_MAX possible values. By doing so the solution can be physically independent from the KGM, rather than a side-channel attack.

noodlespa's crackme 2

Download noodles_crackme2.zip, 78 kb (password: crackmes.de)
Browse contents of noodles_crackme2.zip

keyfile

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. Feb, 2001
Downloads: 1877

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Solutions

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Solutions

Solution by the0crat, published 17. aug, 2007; download (1070 kb), password: crackmes.de or browse.

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Solution by halsten, published 31. jul, 2007; download (724 kb), password: crackmes.de or browse.

halsten has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

halsten 29. Jul 2007	What's the point in removing the song?
Haykuro 29. Jul 2007	level 3?? easily solvable search for string references you'll see "SONIDO1", in spanish SONIDO means sound, so go there and below that youll see the play sound call.
halsten 29. Jul 2007	Unfortunately, my solution was rejected because there is no tutorial. Again, it's a blasphemy to write a tutorial in the first place. Sorry to say this, but this crackme (Hardly I should call it that) should not be in here in the first place.
bLaCk-eye Moderator 29. Jul 2007	Halsten: every solved crackme here should come with a tutorial explaining the solution. there is no exception to that rule. If crackme is too easy, then it's not our fault it's the users fault who submitted it, because he didn't rate it correctly.We have no way to check the correct rating on each crackme, that would mean us solving them before approving. If a couple of users rate this as a number 1 crackme it will be removed from the site.
halsten 29. Jul 2007	Am not talking about solving each crackme, rather than just checking the OBJECTIVE(S) of the crackme itself. This crackme requires to remove the song. So what does this have to do cracking it? Also, in your words that even if I wrote a tutorial with just 1 line describing the solution you would consider that a solution. Sorry, but I beg to differ.
bLaCk-eye Moderator 29. Jul 2007	Solving a crackme is not necessarily cracking it, but instead maybe adding features, solving a bug that makes it crash, figuring out what goes wrong at some point. Whatever the requirements we need a tutorial.We had many crackmes which were solved by only doing a keygen.This is a learning site. No a 1line solution is not valid, that is why if solvers agree this crackme is too easy it will be removed.
halsten 29. Jul 2007	Well...nevermind, have a nice day! :)
halsten 31. Jul 2007	Okay, I re-submitted the solution, but now with a small tutorial. Have fun. :)
MR.HAANDI 02. Aug 2007	I agree with bLaCk-eye, solving crackmes does not mean keygenning, the task is given by the coder, and this one is very realistic. Imagine: with CPUs getting faster everyday it wouldn't be necessary to write signature based protections since they would be bruteforced in some minutes, so the developers will just annoy the trial users with some bad music (maybe "Wham! - Last Christmas" in a ring0 endless loop, or some other annoying song), so the trial users just get headache and buy the software, before they start shoot at people. Howev, longs story short, the point of my comment is: don't shoot at people and anyways why - should you do that? Play counterstrike!
halsten 02. Aug 2007	Actually, I thought the song was nice and not horrible. ^_^

noukeys's noukeys_KeygenME!#1

Download keygenme_1.zip, 223 kb (password: crackmes.de)
Browse contents of keygenme_1.zip

Try to code a keygen, no patching.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 29. Jun, 2007
Downloads: 883

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by _InSaNe_, published 09. jul, 2007; download (238 kb), password: crackmes.de or browse.

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Discussion and comments

ChupaChu 29. Jun 2007	Name must be 8 letters, 3rd letter must be "x" serial must be: T(@25*** * - important char! 2 and 5 are 2nd and 5th char from name! I think this is all..
ChupaChu 29. Jun 2007	no no no.. i said wrong.. there is a string "NoM!RyT$NoM!RyT$=]%." form where important char is pulled out.. Last 6 chars of solution are OK, bu first 4 are not.. still have to figure that part out.. maybe tumorrow, now im to tired ;)
TiGa 30. Jun 2007	Sounds like something is not working right. for the name: ABxDEFGH with random char: % needs the serial: rH%(null)B%E%(null)% with random char: + needs the serial: &H+%B(null)E+++ with random char: ] needs the serial: aG](0x01)B]D(0x00)]] Please test your stuff before sending it in.
ChupaChu 30. Jun 2007	TiGa, none of your name/serial does not work for me ;) (I always get * or ! or h or N for importan chars - never %,+, or ]) And solution always has ending like this: 2nd char from name, , 5th char from name, ** where * is important char. First, second and 3rd letters of serial are changed some way, I will try to figure it out just now. I have a question for you - How do you type in (null) character ?!
TiGa 30. Jun 2007	Of course they don't work. That's what I'm saying. If you need to input a (null) character in the good serial MAYBE there is something wrong with the crackme don't you think?
noukeys Author 30. Jun 2007	You never need to input a (null) character in te good serial. :)
noukeys Author 30. Jun 2007	IÂ´m going to try to explain better. (null) (space)! (null)" <==> ï¿½ !ï¿½" I wish you can now write a tuto and a keygen :P
TiGa 30. Jun 2007	Here it is in detail: .bss:00462624 RandomChar db 3Dh .text:0045B4C7 mov edx, ds:RealSerial .bss:0046262C RealSerial dd 0A7C7D8h debug028:00A7C7D8 db 22h ; " debug028:00A7C7D9 db 48h ; H debug028:00A7C7DA db 3Dh ; = debug028:00A7C7DB db 0 debug028:00A7C7DC db 42h ; B debug028:00A7C7DD db 3Dh ; = debug028:00A7C7DE db 1 debug028:00A7C7DF db 3Dh ; = debug028:00A7C7E0 db 3Dh ; = debug028:00A7C7E1 db 3Dh ; = For random character = and name ABxDEFGH this is the serial I have to enter. It is compared to the serial I entered in the end.
noukeys Author 30. Jun 2007	Other solution is, patching te random function in order tu generate numbers between (5-27) and the serial never need a null caracter. :P
TiGa 30. Jun 2007	Here is your problem: .text:0045B6AF mov eax, 31 .text:0045B6B4 call @System@Random$qqrxi .text:0045B6B9 add eax, 5 .text:0045B6BC mov dword ptr ds:Random31, eax Random value up to 30 + 5 => Max Value 35 .text:0045B46F mov ecx, dword ptr ds:Random31 .text:0045B475 movzx edx, byte ptr [edx+ecx+2] .text:0045B47A mov [eax+3], dl Character is read from the string but [edx+ecx+2] has a maximum value of 37. What is the 37th char of the string? 00 .text:0045B497 mov edx, ds:NoukeysString .text:0045B49D mov ecx, dword ptr ds:Random31 .text:0045B4A3 movzx edx, byte ptr [edx+ecx+3] Same thing again, 35 + 3 => Max Value of 38. What is the 38th char in the string? 01 I understand the algo, I wrote a keygen. I'm just pointing out there is bug in your crackme but you don't seem to care.
ChupaChu 30. Jun 2007	Hey Tiga i did a keygen too, but it only works for most letters. I think it you are correct when you say that a letter puled from hardcoded string can be read outside the string. Anyway it was an interesting keygen me :)

Nova's First KeyGenMe

Download poop.zip, 8 kb (password: crackmes.de)
Browse contents of poop.zip

Need:
.NET Framework

Info:
This is my first KeyGenMe!
Please make a KeyGen for this :)

Tip:
The Hard part is to make the Keygen, not to find the Algorythm

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 08. Mar, 2010
Downloads: 496

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by _ghandi_, published 17. mar, 2010; download (9 kb), password: crackmes.de or browse.

_ghandi_ has rated this crackme as boring.

Solution by moofy, published 11. mar, 2010; download (10 kb), password: crackmes.de or browse.

moofy has rated this crackme as quite nice.

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Discussion and comments

moofy 08. Mar 2010	that was fun, thanks! though, i would personally rate it a 2 or 1. solution submitted :)
synak 09. Mar 2010	definitely 1 :) name: synaklulz code: MjM0MzUuNUp0TmY1MTEzMk9oR08xMjgwNjQyNjEuMDExNzM0MzM0NjZDUkFDSw==
_ghandi_ 09. Mar 2010	If you put no name and this serial: MEp0TmYwT2hHTzIzSW5maW5pdHlDUkFDSw== you will get all of the badboy messages as well as the goodboy at the end.
xylitol 10. Mar 2010	the level was 1, just see in reflector for algo...
_ghandi_ 11. Mar 2010	I submitted a solution but it was rejected because there wasnt a compiled exe to test. I agree though, this is only a 1, not a 4, there is no special knowledge needed to solve this keygenme.

NrZ0e1's CrackMe #1

Download CrackMe.zip, 27 kb (password: crackmes.de)
Browse contents of CrackMe.zip

It's very simple:
Just solve the program will end after pressing 'enter'.
Enjoy! :-)

Additional ( no must ):
Write a patch!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 15. Sep, 2007
Downloads: 1673

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by shade45, published 19. jan, 2008; download (29 kb), password: crackmes.de or browse.

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Solution by kienmanowar, published 18. jan, 2008; download (2 kb), password: crackmes.de or browse.

kienmanowar has rated this crackme as boring.

Solution by br0ken, published 17. sep, 2007; download (65 kb), password: crackmes.de or browse.

br0ken has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

NrZ0e1 Author 18. Sep 2007	Nice to see you solved it ! But I think it wasn't the hardest at all ;-]
br0ken 18. Sep 2007	It wasn't hard. Perfect for newbies! Thank you ;)
DjH2oo7 22. Sep 2007	br0ken: Thak you very much! Why? Bcs I looked for something like dUP, and now, i get it, yahoooo! :D... But the search&replace engine is in ASM, so i translated it to delphi... So, solving this cme is for children, so i solve it and present you my s&r in delphi :)
Andrey_Kolokol 31. Oct 2007	only one function to patch. realy easy
jollyjester 26. Nov 2007	Used the write up and was able to modify the correct location with HIEW. Worked well. Thanks. Now I have to crack one for homework, but this helped me with the process. Cheers.
shade45 18. Jan 2008	Thanks it was nice and easy for a newbie like me :)
boaster 09. Feb 2015	Perfect for 2 days old newbies

NullDog's Nulldgcrk10

Download Ndgcrkm01.zip, 69 kb (password: crackmes.de)
Browse contents of Ndgcrkm01.zip

Thiz is my first crackme and not so dificult.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 17. Apr, 2007
Downloads: 657

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Solutions

Solution by Adjiang, published 25. apr, 2007; download (79 kb), password: crackmes.de or browse.

Adjiang has rated this crackme as nothing special.

Send a message to Numernia »

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Discussion and comments

Numernia's Keygenme Tre

Download keygenme3.zip, 56 kb (password: crackmes.de)
Browse contents of keygenme3.zip

Read the readme. Keygenme includes crypto.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 26. Jan, 2010
Downloads: 788

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by andrewl.us, published 07. apr, 2011; download (53 kb), password: crackmes.de or browse.

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Solution by Dcoder, published 11. apr, 2010; download (229 kb), password: crackmes.de or browse.

Dcoder has rated this crackme as quite nice.

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Discussion and comments

sucre 28. Jan 2010	when i click validate,it runs error
BoRoV 28. Jan 2010	@sucre: Read the readme

Numernia's Keygenme Tvaa

Download num_kgnme.zip, 14 kb (password: crackmes.de)
Browse contents of num_kgnme.zip

Read included readme.txt

The protection includes crypto.
Patching jumps is no valid solutions :)

Hopefully its not too long or too short.

If you find bugs or any errors in the keygenme, Im very sorry for this. Please contact me if you find any.

Have fun.
/Numernia

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 24. Sep, 2009
Downloads: 739

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by HMX0101, published 21. oct, 2009; download (176 kb), password: crackmes.de or browse.

HMX0101 has rated this crackme as awesome.

Solution by Encrypto, published 12. oct, 2009; download (111 kb), password: crackmes.de or browse.

Encrypto has rated this crackme as quite nice.

Solution by andrewl.us, published 12. oct, 2009; download (39 kb), password: crackmes.de or browse.

andrewl.us has rated this crackme as awesome.

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Discussion and comments

artif 24. Sep 2009	very nice!!! thanks you
Numernia Moderator 27. Sep 2009	thank you very much artif :) did you solve it?
Encrypto 28. Sep 2009	Hi Numernia. brilliant keygenme. Will try to solve it soon :)
Encrypto 01. Oct 2009	Okay numernia. I've submitted my solution. but i have to say it is not the best solution. hopefully the supplied code will help to clear any doubts. Again thank you for an awesome keygenme. :)
HMX0101 01. Oct 2009	Wow I just leave some months and Encrypto got some nice cryptoskills and you improved your coding style, I guess ;) numernia, nice work mate :D Later I will be back with some nasty sh*t as encrypto does (nyeberg ruepel? :O).. haha cheers.
Encrypto 01. Oct 2009	oh hello hmx! damn man get online :D good to see you back. thanks for the comments. thats what you get with too much free time :P
cyclops Moderator 06. Oct 2009	seems like old guys are back in action :) Good to see ya HMX!
the hoax 17. Oct 2009	Good to see some quality released here. Thank you Numernia :)
Xrider 08. Apr 2010	nice one bro! :P

Numernia's Seafun Lamagle Keygenme

Download seafunlamagle-keygenme.zip, 41 kb (password: crackmes.de)
Browse contents of seafunlamagle-keygenme.zip

Seafun Lamagle Keygenme
____________________________

Create a keygenerator.

The serial scheme is quite small and straight forward.
This keygenme has been designed for both newbies and
intermediate reversers, however, a solution needs to describe
both serial schemes, although, it shouldn't be too hard.
However, If you'll need an hint, try read again.

And yes it is solvable.

Best regards
Numernia / crackmes.de

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 29. Mar, 2009
Downloads: 562

Rating

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Solutions

Solution by HMX0101, published 07. apr, 2009; download (171 kb), password: crackmes.de or browse.

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Discussion and comments

simonzack Moderator 12. Apr 2009	should've tried it before reading the solution, I'll remember not to next time :P this crackme is awesome!
Numernia Moderator 13. Apr 2009	Thank you simonzack, glad to hear you think its awesome =)

nwert's hyperbola

Download hyperbola.zip, 40 kb (password: crackmes.de)
Browse contents of hyperbola.zip

This task is about (hopefully) interesting crypto/math and some reversing.

Don't let yourself fool by the size of the executable, that's just because the runtime is statically compiled into it.

Valid solution is a working keygen only!

Some working serials:
asd 4311BB3FABC1F375-12E963D4E0F5E3AA
nwert 23D6A3DBDC8D82B9-006BE82477987D21
lulzboat 65453E28B461171D-3059BD500F6FDABA

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 16. Jun, 2014
Downloads: 209

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Solutions

Solution by Dcoder, published 04. aug, 2014; download (276 kb), password: crackmes.de or browse.

Dcoder has rated this crackme as quite nice.

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Discussion and comments

tamaroth Moderator 29. Jun 2014	Am I missing something or did you forget to include both curve parameters (a2,a6)?
andrewl.us Moderator 01. Jul 2014	The moderator comments he supplied are a full reveal, but I can't ruin the challenge. But without a hint, this could turn into "find what exotic thing I'm implementing" hunt. It is indeed curve related.
tamaroth Moderator 02. Jul 2014	Yeah, I've figured it out, now I'm on a hunt for papers ><
Dcoder 23. Jul 2014	Neat. I'll write up a solution later. Dcoder 73A36BA82B921DE1-3DC7533DE76654BA
nwert Author 24. Jul 2014	Nicely done Dcoder!
boonz 04. Aug 2014	Awesome solution, Dcoder!
deurus 13. Oct 2014	Very good job Dcoder!

nwert's SPU Unpackme

Download spu_unpackme.zip, 5 kb (password: crackmes.de)
Browse contents of spu_unpackme.zip

Now for something completely different - a Cell BE (PS3 anyone?) SPU unpackme. The goal here is to unpack the protected payload, anything is allowed (e.g. emulation, static analysis, ...). Note that the target platform to run this on, is a PS3's SPU in isolation mode, so keep that in mind when you try to emulate the binary in order to unpack it.

Have fun!

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: C/C++

Published: 14. Aug, 2012
Downloads: 92

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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obnoxious Author 28. Jan 2010	Is it too difficult? :P
andrewl.us Moderator 28. Jan 2010	my brain's too fucked to solve it :P
obnoxious Author 28. Jan 2010	If your brains too fucked then i am sure u have solved it. :P
Jim~ 29. Jan 2010	This is too easy because I know what you're doing. You could have at least changed the syntax up a bit. ;P JIM +++++++++[>++++++++<-]>++.-.++++. I'll see if I can write up a keygenerator. Going to be interesting trying to make it generate compact serials.
Jim~ 29. Jan 2010	Nevermind. I don't have anything to compile with right now (fresh copy of windows lol). I'll have to keygen it later.
obnoxious Author 29. Jan 2010	Aah Jim~ long time no see :P Sorry in the greets i put the "~" infront of your name, instead it should have been after :P Yup i ddnt change the syntax coz actually i was writing an interpreter and then i had the idea to make it into a little crackme :P
jhonny_1977 30. Jan 2010	just copy this into visual studio public static void interprete (string name, string serial) { int i3; int i1 = 0; char[] charArray1 = new char[32768]; int[] int32Array1 = new int[2]; string string1 = ""; string string2 = serial; int i2 = 0; while (true) { if (i2 >= string2.Length) { if (string1.Contains (name)) { Console.WriteLine ("\n{0}!!!!", string1); return; } Console.WriteLine ("\n{0} Nothing happened {1}", Convert.ToChar (3), Convert.ToChar (3)); return; } if (string2.Substring (i2, 1) == "[") { int32Array1[0] = i2; i2++; while (string2.Substring (i2, 1) != "]") { i2++; } int32Array1[1] = i2; int32Array1[0]++; while (charArray1[i1] != '\0') { for (i3 = int32Array1[0]; (i3 < int32Array1[1]); i3++) { switch (string2.Substring (i3, 1)) { case ">": { i1++; break; } default: { switch (string2.Substring (i3, 1)) { case "<": { i1--; break; } default: { switch (string2.Substring (i3, 1)) { case "+": { charArray1[i1]++; break; } case "-": { charArray1[i1]--; break; } } break; } } break; } } } } i2 = (int32Array1[1] + 1); } if (string2.Substring (i2, 1) == ">") { i1++; } if (string2.Substring (i2, 1) == "<") { i1--; } if (string2.Substring (i2, 1) == "+") { charArray1[i1]++; } if (string2.Substring (i2, 1) == "-") { charArray1[i1]--; } if (string2.Substring (i2, 1) == ".") { string1 = (string1 + Convert.ToChar (charArray1[i1]).ToString ()); } i2++; } }
Zakne 01. Feb 2010	.NET crackmes are boring. This is level 1 even lower lol.
obnoxious Author 01. Feb 2010	:) I agree that its lvl 1 or even lower but i certainly disagree that .net crackmes are boring ;)
T.0.R.N.A.D.0. 01. Mar 2010	Hi obnoxious bro !! This is easy one. My KeyGenMe #1 (both versions) were similar ... but a bit harder .. this one is pretty straight-forward ! I'll upload a keygen and tut soon .. :)
obnoxious Author 01. Mar 2010	yo bro. nice to see you. Send me a pvt msg telling me abt how real lifes going on :P
dmtdmt2012 25. Mar 2012	This is a joke - just use IL spy and you can read it like an open diary

obnoxious's Obnoxious'sKGM#1

Download Obnoxious__sKGM#1.zip, 351 kb (password: crackmes.de)
Browse contents of Obnoxious__sKGM#1.zip

:::::::::::::::::Obnoxious's KeygenMe #1:::::::::::::::::

Well, i had been thinking of writing a keygenme for a long time n finally this is what i have to offer. i dd not hear any chiptunes in any of the .net crackmes, so i decided to put some music into mine. hope u guys like it.

Difficulty You Decide!
Language c#.net

::::rules::::
No patching.
No Bruteforcing.
Write a tut if u crack it!
For newbies its ok if u dont make a keygen!
But the bigGuns like MACH4,Jim~,costy,digital acid n the others should make a keygen.

Happy cracking
Thanks to all at crackmes.de

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 27. May, 2008
Downloads: 472

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by fawad, published 22. jun, 2008; download (154 kb), password: crackmes.de or browse.

fawad has rated this crackme as nothing special.

Solution by SubmiN|KinG, published 31. may, 2008; download (223 kb), password: crackmes.de or browse.

SubmiN|KinG has rated this crackme as boring crap.

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Discussion and comments

SubmiN\|KinG 27. May 2008	Difficaulty cannot be any higher than 1, this one is too easy to be a 2.
obnoxious Author 27. May 2008	i kno. but its aimed at the noobs so i guess its that hard atleast for them ;)
obnoxious Author 27. May 2008	@SubmiN\|KinG can u make a keygen without using the info file that i deliberately put?..........if yes plz let me kno
w02057 27. May 2008	Hi obnoxious I liked the ideas in your crackme, but it was really too easy lol :-) Ive been trying to get .wav files to play from the .exe's resource in VB 2005 for a long time, but to no evail. Did you extract it to some temp directory then play it? Could you or anyone else tell me how you did it, Thanks in advance, w02057
Jim~ 27. May 2008	I'm a bigGun? I'm honored. Interesting keygen, but not hard. I like the hidden string. I'll submit a solution later if no one else has ;P w02057, why not take a look at his code in reflector using VB formatting? :X
SubmiN\|KinG 28. May 2008	@obnoxious: no, u cant keygen ur keygenme without using the file ur kgme creates at startup....
obnoxious Author 28. May 2008	he he i kno so i had deliberately put the info file. but theres another way of retriving the hash code. keep looking n u sd find it. let me kno if u find it. a bit of patching mayb needed ;) and as for w02507 i embeded the wave file into my kgm#1 n then created a player to playit. i guess u kno how to add the wav file into the resource.heres the code for the player in c# using system.media; //in the forms section // soundplayer player = new soundplayer(projeactname.properties.resources.filename); player.play();
DigitalAcid 28. May 2008	Lol, i'm not a bigGun =).
obnoxious Author 28. May 2008	Now now dont be so modest guys...............;)
fawad 20. Jun 2008	I've submitted my solution. I hope it makes it through this time.. Anyways.. the other way to generate serial without using file would be to patch the original program and write the data into registry.. right?? Or we just look upto the file last update time and use it, I guess..? What do you reckon?
costy 20. Jun 2008	@obnoxious i'm not a bigGun. Cracking is justan hobby.

obnoxious's Obnoxious'sKGM#2

Download Obnoxious__sKGM#2.zip, 6 kb (password: crackmes.de)
Browse contents of Obnoxious__sKGM#2.zip

:::::::::::::::Obnoxious's KGM#2:::::::::::::::
My second crackme. Pretty simple n easy algo. Have fun cracking it!

Rules
Patch the nags if u want. (Alternately registering the software too will remove the nags.)
Make keygen+tut.

Thanks to all at crackmes.de!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 31. May, 2008
Downloads: 563

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Solutions

Solution by mjones, published 05. jun, 2008; download (222 kb), password: crackmes.de or browse.

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Solution by born2c0de, published 05. jun, 2008; download (33 kb), password: crackmes.de or browse.

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Discussion and comments

born2c0de 01. Jun 2008	Sweet Crackme. 1/10 for Protection + 2 Points for the Neat Trick. Keygen Created....Writing Solution. Will Post in a few minutes. Well done obnoxious.
obnoxious Author 01. Jun 2008	Thank you born2c0de. i will put some thing with a higher protection some time sooner ;)
PrincessJade 02. Jun 2008	it seems to completely ignore whatever i put in for user, i wrote a keygen but the only one that works is the active account username?
born2c0de 02. Jun 2008	Yes, because the crackme generates a unique serial for each account.

obnoxious's Obnoxious SerialMe

Download SerialMe.zip, 401 kb (password: crackmes.de)
Browse contents of SerialMe.zip

## Obnoxious Serialme :P ##

this crackme took a long time in the making. i was too busy playing travian :P

valid character set [0-9] [A-D]

rules
no patching
no bruteforcing

Greetz fly out to cyclops, andrewl.us, indomit(no wonder you will be the first to try it), tornado, tiGa, jim~, br0ken and all my friends @ crackmes.de

P.S dont let the size of the crackme bother you its because of the music file that i added :P

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 19. May, 2009
Downloads: 563

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by indomit, published 22. may, 2009; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

papanyquiL 19. May 2009	hahah awesome crackme.
indomit 19. May 2009	@obnoxious: :) Nice crackme, very similar to your Get2ThatNumber, but better code now and much more keys :) I thinks it has infinitive number of keys :) 'cos now there is loop in key-tree :)
obnoxious Author 19. May 2009	:) but i kno only one key. too lazy to find the rest of keys for myself. hope you will find them for me. :) hehe
T.0.R.N.A.D.0. 22. May 2009	c0OL gfx + sfx ! Nice one :)
obnoxious Author 23. May 2009	oO i did not notice the solution is out. gr8 work indomit :P
papanyquiL 23. May 2009	good job indomit :P I've been trying to figure this one out a while..
Filler 23. May 2009	nice indomit! "Not moving Text" :D
indomit 23. May 2009	Thank you all! :)

obnoxious's Optimise

Download optimise.zip, 5 kb (password: crackmes.de)
Browse contents of optimise.zip

Its been long since i last put a crackme so have fun cracking this one.
As usual the rules are no bruteforcing.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 30. Jan, 2009
Downloads: 440

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Solutions

Solution by sghctoma, published 05. feb, 2009; download (22 kb), password: crackmes.de or browse.

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Discussion and comments

obnoxious Author 01. Feb 2009	I forgot to mention "No patching too" Have Fun!!!!
sghctoma 02. Feb 2009	hi! thx for this crackme, it was fun to solve it.. I have just submitted a solution, I hope it gets accepted :) this crackme made me blow the dust off my discrete mathematics books, because I became curious about Diophantine equations..
zapline 03. Feb 2009	1 “h”“ p”“ x” 138 148 158 2 147 157 167 177 3 17-20 6 4 20-24 5 5 25-20 4 6 33-40 3 7 49-61 2 8 97-122 *1 like： xwrdxoze ppxipofx pbldhlhx pplilxbq xplnxllo xwrspctp
indomit 09. Feb 2009	if ((((Convert.ToInt32(str.Substring(5, 1)) * num) + (Convert.ToInt32(str.Substring(6, 1)) * num2)) + (Convert.ToInt32(str.Substring(8, 1)) * num3)) <= Convert.ToInt32(str.Substring(9, 4))) { num5++; } I think that the author wanted to indicate the 6th, 7th, 8th digits rather than 5, 6, 8. because the fifth digit is 0. Or not? :)
indomit 09. Feb 2009	And, Solution by sghctoma is incorrect. Keygen not working. I think its because the last equations value is not 6001. 0x17 = 23, and Convert.ToInt32(str.Substring(0x17, 4))) = Convert.ToInt32(str.Substring(23, 4))) = 2400
sghctoma 09. Feb 2009	OMG, you're correct, I have messed it up.. I guess I was just lucky, and always got values that are good for the last inequality as well while testing the keygen.. thanks for pointing this mistake out..
obnoxious Author 13. Feb 2009	Its cool. A bit of miss coding :P.... Keygen will work for some keys generated...Nice solution sghctoma.
obnoxious Author 13. Feb 2009	@indomit that equation is just that way :) "optimisation by linear programming problem - simplex method" :)
indomit 13. Feb 2009	I just see that 7th symbol of string str is never used... That's confused me :)

obnoxious's Symmetry

Download symmetry.zip, 5 kb (password: crackmes.de)
Browse contents of symmetry.zip

Obnoxious - Symmetry :)

Rules:
1.No Patching
2.No Bruteforcing
3.Keygen With multiple serials for each name prefered.

I m not sure whether to rate this crackme as 2 or 3 so i wd rather rate it as 2.5. Crack it and decide if it sd be 2 or 3. Have Fun.

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 04. Mar, 2009
Downloads: 383

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by indomit, published 06. mar, 2009; download (7 kb), password: crackmes.de or browse.

indomit has rated this crackme as nothing special.

Solution by gemigis, published 06. mar, 2009; download (34 kb), password: crackmes.de or browse.

gemigis has rated this crackme as quite nice.

Send a message to Oc48 »

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Discussion and comments

gemigis 04. Mar 2009	tut uploaded, hope you guys find it good
indomit 05. Mar 2009	Yes, I think serial fishing is about Difficulty 1-2, but keygening with _multiple_ serials a bit more difficult :)
obnoxious Author 06. Mar 2009	lookin 4rward to the solutions. so indomit did you keygen it?
gemigis 06. Mar 2009	keygen with tut waiting for approval...
indomit 08. Mar 2009	yes, keygenning was a bit fun :)
indomit 10. Mar 2009	obnoxious, how do you evaluate our keygens? :)
obnoxious Author 10. Mar 2009	Gr8 work both of you. The keygens were gr8. The trick was not finding what the keys wd be like but writing a smart proggie that cd find the keys. Again gr8 work both of you. Stay tuned for my next keygen me.....

Oc48's uCantCrackMe

Download uCantCrackMe.zip, 8 kb (password: crackmes.de)
Browse contents of uCantCrackMe.zip

Think you're good enough?
Try this crackme.. see if u can write a tutorial for that.

Good Luck !

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 15. Feb, 2010
Downloads: 486

Rating

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Solutions

Solution by alex_ls, published 23. feb, 2010; download (17 kb), password: crackmes.de or browse.

alex_ls has rated this crackme as quite nice.

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Discussion and comments

Oc48 Author 23. Feb 2010	Great Job Alex! =D Im glad you had fun reversing the crackme! =) I'd be happy to see more ppl writing tutorials for this crackme. I wanna be amazed by the new ways of solving this one =D

oddcoder's my first crack me

Download crack.zip, 2 kb (password: crackmes.de)
Browse contents of crack.zip

you are required to create a keygen for this crack me you are supposed.
no patches are accepted

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 22. Apr, 2015
Downloads: 126

Rating

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Solutions

Solution by mrmacete, published 26. jul, 2015; download (5 kb), password: crackmes.de or browse.

mrmacete has rated this crackme as nothing special.

Solution by acruel, published 26. jul, 2015; download (2 kb), password: crackmes.de or browse.

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Send a message to Office Jesus »

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Office Jesus's Fun KeygenMe #0

Download fkgm0.zip, 72 kb (password: crackmes.de)
Browse contents of fkgm0.zip

Here's a simple keygenme that will test your patience.

Protection: MD5

Rules:
1) Keygen + Tutorial is the ultimate goal
2) Self-Keygenning and Phishing are more than welcome -- a posted serial will be difficult to test, as you may soon find out ;)
3) Do NOT patch

Please report any bugs, though there should not be any...

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 03. Aug, 2010
Downloads: 484

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Solutions

Solution by Coderess, published 08. sep, 2010; download (43 kb), password: crackmes.de or browse.

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Discussion and comments

Coderess 03. Aug 2010	Coderess iNFEE-TUGTM-63899-A0B08-0R8NA Easy to find key, but for write keygen need a lot of time
EvOlUtIoN 03. Aug 2010	Maybe you lost something coderess, your key does not work on my system :)
Coderess 03. Aug 2010	Windows sp3 -- all is worked, what about your system version?
eshu 03. Aug 2010	I might point out here from the rules: "a posted serial will be difficult to test"
Coderess 03. Aug 2010	Ne pizdi, I have not read the rules
Office Jesus Author 03. Aug 2010	I'll give a hint if anyone requests it.
EvOlUtIoN 04. Aug 2010	Simply the serial can depend on some hardware/software of the particular system.
buganxin 11. Aug 2010	waiting for solution
Coderess 11. Aug 2010	I didn't make other attempts, when I found key, because I'm too lazy for that
Coderess 02. Sep 2010	I created a keygen, now I'm writing the solution

Office Jesus's Fun KeygenMe #2

Download fkgm2-OJ.zip, 25 kb (password: crackmes.de)
Browse contents of fkgm2-OJ.zip

Here's a simple crypto keygenme.

Rules:
1) Keygen + Tutorial is the ultimate goal
2) Self-Keygenning and Phishing are more than welcome
3) Patching is acceptable as a last resort

Please report any bugs...

Good luck,
oJ

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 14. Jan, 2015
Downloads: 467

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by chalter, published 08. feb, 2015; download (25 kb), password: crackmes.de or browse.

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Discussion and comments

Coderess 15. Jan 2015	Hey bro, where is Fun KeygenMe#1? :)
ragdog 18. Jan 2015	This is a nice keygenme but i have solved it by T4you on 03 Jan
chalter 28. Jan 2015	The modular exponentiation algorithm starting at 405380 was funky to work through and understand how it works. Very weird way of exponentiation! Is there a name for the algorithm or did you work it out yourself to obscure it?
Herz3h 28. Jan 2015	Does this require one to know SHA-1 or no?
Office Jesus Author 29. Jan 2015	@Coderess: That one I don't think is worthy of posting here. I don't like it as much as this one. @chalter: This uses drizz's library for the modular arithmetic. If you want to know more about that particular implementation, he has documentation available... somewhere. I designed everything else _outside_ the library, and nothing was obscured too heavily. I'm sure someone will provide a tutorial explaining how everything works. You can also message me for more information. @Herz3h: You don't need to know _how_ SHA-1 works as long as you know what it is and can recognize it.
tamaroth Moderator 03. Feb 2015	I liked how you've hardcoded part of the serial as a discrete log. Thanks for fun kgme!
adwi32 04. Feb 2015	I can say I've done it, and learned alot of how RSA work in a process. Its a shame how little I know about this the most important crypto today. Thanks!
Herz3h 25. Feb 2015	Wow i just read the solution, no way i could have solved it......

oklahoma's Oklahoma's KeyGen Me Please!

Download oscm.zip, 26 kb (password: crackmes.de)
Browse contents of oscm.zip

Hi There! How Are You? Ready For Some Action? Here Is The Task For You,
Make A KeyGen For This "KeyGen Me Please!" kinda CrackMe Little Thing...
But! No Cheating, I.E BitHacking Or SomeThing Else, It Is Anyway Very Simple
To Solve... EXE File Is Not Protected, Just A Little Bit Compressed,
So You Can Dump It And Restore Easy... But! I Should Warn You,
This Is Will Not Be A BlitzKrieg For You, There Is Nothing Tough,
If You Know What You Have To Know - You Will Make It. But, If You Are Not,
Then You Should GrowUp And Learn SomeThings, Or You Should Just Restore
Your Memories That You Probably Forgot. Because WithOut This Simple Knowledge...
This Would Be Tough For You...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 19. Feb, 2005
Downloads: 1322

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by bbvv, published 22. oct, 2005; download (82 kb), password: crackmes.de or browse.

bbvv has rated this crackme as boring crap.

Solution by Knight, published 28. jun, 2005; download (62 kb), password: crackmes.de or browse.

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oklahoma's Oklahoma's KeyGen Me Please II

Download oscmii.zip, 10 kb (password: crackmes.de)
Browse contents of oscmii.zip

Hi There! Ready for real challenge? This crackme is easy if you can handle it, but if you can't then remember - Suffering Never Tasted So Good! :)
Just KeyGen it! Good Luck!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 02. Aug, 2005
Downloads: 736

Rating

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Solutions

Solution by bbvv, published 29. oct, 2005; download (148 kb), password: crackmes.de or browse.

bbvv has rated this crackme as boring crap.

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Discussion and comments

oklahoma Author 17. Sep 2005	Does anyone digin' it? I'm just interesting.
oklahoma Author 01. Nov 2005	bbvv solved this using "bruteforce" way, who will solve it with "high-math" way? :)

oklahoma's Oklahoma's KeyGen Me Please! III

Download oscmIII.zip, 22 kb (password: crackmes.de)
Browse contents of oscmIII.zip

Just meat for the beginners. KeyGen it!
Good Luck!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 12. Oct, 2005
Downloads: 838

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by bbvv, published 18. oct, 2005; download (147 kb), password: crackmes.de or browse.

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Send a message to -Oky. »

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Discussion and comments

Ox87k 16. Oct 2005	it's not level 1 in my think! ^^' the algo is a very jungle!! i try it!
Gauri 17. Oct 2005	Yah i agree with that it is higher than level 1
oklahoma Author 17. Oct 2005	what is so hard? I can solve such things in an hour. :) well maybe I have some other overview about the beginners...
CatVir 17. Oct 2005	yeah, encoding executable is definately higher level than for beginners, however, I find this executable a good try to write my first deprotection executable that will rebuild original exe :)

-Oky.'s WxProtect v1.0 Crackme

Download WxProtect_CrackMe.zip, 44 kb (password: crackmes.de)
Browse contents of WxProtect_CrackMe.zip

The official crackme for the WxProtect protector which was written for a university project.

Try and beat the protection then just patch out the registration dialog or force invalid serials to be accepted.

This is my first ever attempt at a protector so don't expect to much :)

Your suggestions/feedback would be greatly appreciated.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 31. Mar, 2006
Downloads: 832

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by ala_borbe, published 18. jan, 2007; download (64 kb), password: crackmes.de or browse.

ala_borbe has rated this crackme as quite nice.

Solution by ReHPer, published 18. nov, 2006; download (123 kb), password: crackmes.de or browse.

ReHPer has not rated this crackme yet.

Solution by znycuk, published 10. apr, 2006; download (92 kb), password: crackmes.de or browse.

znycuk has rated this crackme as quite nice.

Send a message to olici »

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Discussion and comments

l0calh0st 31. Mar 2006	Thanks...too easy ;)
toshimi 31. Mar 2006	mmm.. it seems simple...
l0calh0st 31. Mar 2006	Do we need to make a keygen...???
HMX0101 31. Mar 2006	Very nice crackme, its uses some fpu functions... Great!, thanks!
-Oky. Author 31. Mar 2006	Thanks, Iâ€™m glad you enjoyed it. The main aim of the crackme was to defeat the protector so a keygen is not necessary although it would be more than welcome. Very impressed with the speed you reverse it!, I'll try and make it harder next time ;)
red477 31. Mar 2006	but what keygen,i could find only one key :D
-Oky. Author 01. Apr 2006	Just had another look at the key verification routine and your right, it does seam to produce the same key for similar input and even if you enter completely different input, it still doesn't change a lot :( I remember writing it off the top of my head very late a night and with no intention of it being analyzed, sorry. The application itâ€™s-self was written quite quickly and simply, just so I could (legally) demonstrate how software was reversed. The whole idea was you had this extremely vulnerable app that the protection could make secure :)
zairon Moderator 01. Apr 2006	Yes you're right, it's easy but... (imho) it's a nice introduction to the unpacking world. I would expect some detailed tutorials and not the usual annoying 'load the file in olly, dump the file, rebuild....'. Try to answer to some questions: - What about the IAT? Write something about import table desctruction, iat rebuilding - Is there an hash checking? - Is there an encryption? - Are there some anti-disassembly and anti-debugging tricks? Good luck.
ReHPer 19. Nov 2006	hahaha... for 0/10
Zaphod 20. Nov 2006	Oky and red477, I don't understand what you mean when you say there is only one key. Different names DO generate different keys...

crp- 12. Sep 2006	homegrown obfuscator?
oldsoft Author 16. Sep 2006	yes, correct.. It uses homegrown one.
badmojo 16. Sep 2006	Welcome to OldSofts R0lling Key Challenge! You must make a valid keyfile, to success! Checking key... Good Job! You made it! Nice challenge, thanks! Will write solution if I have time. This one is interesting.
crp- 16. Sep 2006	i suggest anyone who's bored of x86 asm taking a look at this one (without looking at a solution). quite fun :) ps: i fear i accidently gave this crackme a bad rating. if a moderator could fix this?
oldsoft Author 16. Sep 2006	I am glad that you like it :)
oldsoft Author 17. Sep 2006	Nice solution, crp- Well done :)
elfz 19. Sep 2006	crp-'s rating pushed up.
warsaw 02. Aug 2012	Are you sure this is a homebrewed obfuscator? The structure of the string decryption function is very similar to one in the Burp software suite.
tamaroth Moderator 05. Aug 2012	Note that at that time (2006) it might have been home-brewed but have since turned into a full grown product. Who knows, maybe oldsoft even made it.
warsaw 30. Oct 2012	According to this, http://www.the-playground.dk/index.php?page=zelix-klassmaster-string-encryption, the string encryption is the exact same as that used by Zelix Klassmaster, a commercial product, (Which dates to before 2006). Is there anyway to report crackmes?
draww 31. Oct 2012	@warsaw: you can contact one of the moderators and explain the situation.

olici's notepad_crackme

Download crackme_5.zip, 312 kb (password: crackmes.de)
Browse contents of crackme_5.zip

this crackme very hard to solve...
you must valid password to get next level serial....
you can patch the program but if password is invalid serial code has seen crypted hash....

so my english is very bad...but Ä± think you understand this if you worki with this crackme..

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 03. May, 2006
Downloads: 497

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by simonzack, published 17. sep, 2010; download (261 kb), password: crackmes.de or browse.

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Discussion and comments

Shism 03. May 2006	Ya it is pretty good... but it's obvious what it's doing. and no I don't intend to crack it, but I'm just saying it's obvious. Also, the anti-debugging sucks ....
raski 07. May 2006	don't be so rude to the kid...how dare you? lol olici, crackme is good. i hope you'll come up with harder one...
olici Author 07. May 2006	thanks raski....

oliver's oliver's first crackme

Download ocrackme.zip, 124 kb (password: crackmes.de)
Browse contents of ocrackme.zip

name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 25. Oct, 2000
Downloads: 1930

Rating

Waiting for at least 3 votes
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Solutions

Solution by kalten, published 25. oct, 2000; download (254 kb), password: crackmes.de or browse.

kalten has not rated this crackme yet.

Solution by pincopall, published 25. oct, 2000; download (101 kb), password: crackmes.de or browse.

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Solution by nh, published 25. oct, 2000; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

Ollie's KeygenMe v1

Download KeygenMe1.zip, 167 kb (password: crackmes.de)
Browse contents of KeygenMe1.zip

This is a simple keygenme aimed at the beginners.
If you manage to figure it out, please post the solution.

Good luck and have fun! :D

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 03. Apr, 2014
Downloads: 1740

Rating

Votes: 5
Crackme is boring.

Rate this crackme:

Solutions

Solution by lerie, published 14. jul, 2014; download (34 kb), password: crackmes.de or browse.

lerie has not rated this crackme yet.

Solution by anubis13, published 19. apr, 2014; download (740 kb), password: crackmes.de or browse.

anubis13 has rated this crackme as quite nice.

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Discussion and comments

andrewl.us Moderator 04. Apr 2014	(basscode spoiler comment removed!)
basscode 05. Apr 2014	My bad. Anyways good luck to the newbie reversers.
botanyaki 05. Apr 2014	Need keygen? lol We can calculate the key with brain. very easily. Good luck guys : )
Ollie Author 06. Apr 2014	@botanyaki Yeah it's supposed to be simple so even the very beginners can reverse it!
0pgm 14. Apr 2014	Done with keygen. r-e-k-c-a-r-c ;)
new_man 14. Apr 2014	it's very easy just reverse your username and put - after each char so if username is eli the password is i-l-e
lottex 15. Apr 2014	LoL I cant solve it :D I have no idea what im doing what so ever :( I think ive located the string that says "Not correct" But I dont know what to do now :(
new_man 16. Apr 2014	1 min to solve and 1 to write a keygen http://codepad.org/CaxeQnGW
xiayuanzhong 17. Apr 2014	XD Newbie here, finding a huge amount of ...junk bytes?
evaboy 27. Apr 2014	This should be level 2 task. Am a newbie, l don't even understand how the inputs are processed though l know the segment that does that. Anyway, nice crack me.
@BOT 02. May 2014	i am a newbie....can anybody help me from where to start learning reverse engineering...since i am very much interested in this stuff.... thanks in advance
evaboy 02. May 2014	@BOT: You are at the right place. However, u ought to have ASSEMBLY knowledge, search for LENA101 tutorial on google and download it. Google Legend of randon or so and enter the site, you will see large materials and tutorials. And if you want to advance to keygen, you will have to have any programming language knowledge enough to code keygen. Youtube can also do you good. But bear in mind that this is a hard and boring task that needs enough patients for. I wish you success.
Borgiman 16. May 2014	Nice keygenme. Something broke while debugging for me... as soon as i enter a username it says "correct" without even asking for a key - and this loops forever and it spams "correct". but if i start the exe alone, it works fine debugging protection?
Ollie Author 19. May 2014	Borgiman, there's no special debugging protection going on. What debugger are you using?
proximation22 27. May 2014	can anybody know, what is the best software to hack facebook easily guys?... i'm a newbie here... .i would like to have my 2nd achievemnts in hacking... simple hacking only :)
B3G1NN3R 31. May 2014	i know how to crack but how to find relation between the username and keygen is hard for me however i know much of c & C++ i can make keygen if i know the algo...
Borgiman 31. May 2014	@Ollie: i'm using ollydbg - i'll try again later, it might've been just some wierd constellation
grayfox 08. Jun 2014	This is a very easy one. Just keep an eye on the registers and you'll get an idea of what's going on... However, to get in touch with a debugger/disassembler for the first time, it's okay. Albeit following the algorithm in the ASM is confusing at first glance.
kaoyange 11. Jun 2014	I have the same problem with evaboy although I know how to generate the key according the User using the Ollydbg.But in my opinion,reverse engineering is not so about this,we should know the author how to write the programe and what library function he used through reverse analysis.So,can you tell me how you receive inputs and process inputs?I'm so confused.Thank you very much
Ollie Author 11. Jun 2014	kaoyange, It's written in Visual C++, and it uses the std libraries to handle io and other stuff.
kaoyange 12. Jun 2014	@Ollie Thank you,But why does OD can't analyze std libraries such as cin or cout in your keygenme.I used C++ std library cin write a program to test it,OD can distinguish it.Have you thought about this problem?
Mattstersplat 16. Jun 2014	Yay! This was the first one I've cracked by myself :D I really like the crackme that you very much for making it :D
bubuchenko 23. Jun 2014	Crack it for what? You can just enter one single digit character for each entry and it'll be accepted. C# Keygen? Random R = new random(); Console.WriteLine(R.Next(0, 9)); Console.WriteLine(R.Next(0, 9));
sadiqbj 25. Jun 2014	how can i upload my solution
zairon Moderator 25. Jun 2014	There a "Submit your solution" link few lines above the "Discussions and comments" area
M$A!_ 05. Jul 2014	WTF? I did not even begin to debug it ?! I just entered key + pass and it was correct O____O
thebigben 11. Aug 2014	Okay, but why does it connect to 64.4.10.33:123?
Ollie Author 28. Aug 2014	thebigben, there is no networking code in the application. If you really want to, I can give you the source code but I can promise it will not connect to any site or computer.
SeratorMile 21. Jul 2015	i guessed the key by accident :)
evaboy 25. Jul 2015	l just typed u as the username and u as the key, just to see "Correct! Now write a keygen. :)" Could there be a bug in the code?
Ollie Author 27. Jul 2015	@evaboy, it's not a bug, just bad design I guess haha.

Ollie's KGNMEV2

Download KGNMEV2.zip, 8 kb (password: crackmes.de)
Browse contents of KGNMEV2.zip

The goal of this exercise is to create a key generator that generates a working key (random each time) for the .exe provided.
Patching is not allowed!

Estimated difficulty (0-10): 2-3
Compiled with: MSVC++
Last updated: 22.7.2015

If you manage to keygen it, please provide a solution and submit at the project page on crackmes.de!
Have fun cracking!

From Finland with love,
Ollie

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 29. Jul, 2015
Downloads: 374

Rating

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Solutions

Solution by KKR_WE_RULE, published 07. aug, 2015; download (4 kb), password: crackmes.de or browse.

KKR_WE_RULE has rated this crackme as boring.

Solution by acruel, published 07. aug, 2015; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

evaboy 30. Jul 2015	Authorization successful, great job! Hahaa.. l was mad at it though l can't keygen it.
profdraculare 03. Aug 2015	Keygen submitted!
otto 09. Jan, 16:13	Was unable to solve this crackme or understand the solution. There are so much function calls, unable to follow them :(
beaver 25. Sep, 05:40	Otto, you can use breakponts on cout and cin fuctions.

Send a message to opcode0x90 »

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Discussion and comments

alex_ls 31. Aug 2007	Very nice crackme like for the newbies, I've got pleasure from resolving it and had be glad to see your next crackme! The solution is on its way :)
opcode0x90 Author 03. Sep 2007	A very well-done man. :) This crackme is pretty under-rated. (I must admit, cant even solve by myself cough) So far you are the only person who solve it. ;) (or the only person who gave full attention). So what OS you are running? The SizeOfRawData patch is supposed to be an anti-IDA trick, and it works well on my OS.
alex_ls 03. Sep 2007	Sorry man, on the clean machine with Windows XP, Service Pack2 it works very well! But I have used Windows Xp SP1 with SoftIce and DeamonTools installed, maybe this stuff got my system crashed.

opcode0x90's crackme_nop_vm

Download crackme_nop_vm.zip, 1 kb (password: crackmes.de)
Browse contents of crackme_nop_vm.zip

A very simple and straight-forward VM crackme. If you cant solve this, dont ever try on other VM. No anti-debug trick, except one anti-PEiD trick. ;)

Again, for beginners.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 27. Jun, 2007
Downloads: 1429

Rating

Votes: 8
Crackme is nothing special.

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Solutions

Solution by barun, published 16. oct, 2014; download (234 kb), password: crackmes.de or browse.

barun has rated this crackme as nothing special.

Solution by Bargest, published 14. aug, 2013; download (2 kb), password: crackmes.de or browse.

Bargest has rated this crackme as nothing special.

Solution by alex_ls, published 05. aug, 2007; download (621 b), password: crackmes.de or browse.

alex_ls has rated this crackme as quite nice.

Discussion and comments

jB_ 30. Jun 2007	Nice crackme, like the first one. It is a good starter, give us something harder next time :)
opcode0x90 Author 02. Jul 2007	Glad you like it. :) Perhaps next time I will write up an unpackme, so stay tuned. ;) If its possible, do submit your solution. There is more than 1 way to solve this crackme.
BUBlic 26. Jul 2007	Oh no! No pizza either! Nice one though, but Difficulty: 1?
alex_ls 03. Aug 2007	There's very nice crackme, but resolving this staff i found it more complicated than i have expected (difficulty: 1)
opcode0x90 Author 05. Aug 2007	GJ man. Have I under-rated this crackme? :/ The whole thing is very straight-forward. I made no attempt to obfuscate the VM engine or anything similar. The only thing hard should be the hashing algorithm.
cryostat13 15. Aug 2013	hi Bargest can you share source dissasembler?
Bargest 19. Aug 2013	Yes, I can. Check PM.
Bargest 19. Aug 2013	For everyone, who wants to see this... "disassembler": https://www.dropbox.com/s/yt6075l5hj7i5z9/Source.cpp
barun 16. Oct 2014	Good one. Indeed, it should be the first one to try before checking other VM crackmes. My solution includes a disassembler in python for Imm Dbg.

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Opx's Serial

Download serial.zip, 427 b (password: crackmes.de)
Browse contents of serial.zip

find for valid password

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 16. Nov, 2003
Downloads: 1464

Rating

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Solutions

Solution by code_inside, published 17. nov, 2003; download (2 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 17. nov, 2003; download (33 kb), password: crackmes.de or browse.

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Solution by HelL_master, published 17. nov, 2003; download (16 kb), password: crackmes.de or browse.

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Opx's Time CrackM3

Download timecrk.zip, 649 b (password: crackmes.de)
Browse contents of timecrk.zip

watch ut Time!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Oct, 2003
Downloads: 1363

Rating

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Solutions

Solution by Oorja-HalT, published 29. oct, 2003; download (2 kb), password: crackmes.de or browse.

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OrCs236's OrCs236 Crackme

Download crackme.zip, 362 kb (password: crackmes.de)
Browse contents of crackme.zip

This is my first attempt at a crackme, so please be kind.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 26. Oct, 2005
Downloads: 1180

Rating

No votes yet.
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Solutions

Solution by Game.Over, published 13. nov, 2005; download (569 kb), password: crackmes.de or browse.

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Discussion and comments

r0bert 26. Oct 2005	Im getting "AutoIt Error","Unable to open the script file" when i unpack the crackme... is that part of the crackme or ?
bigboss1988 26. Oct 2005	hi i think it's not for newbies!!
bigboss1988 26. Oct 2005	r0bert, try to make MUP this way very easy better than script and learn something new ;) i know OEP 0043F2F8 55 PUSH EBP but i can't fix IAT! also.. when press F9 to run crackme the olly colse!! the better way to slove this problem change ollydbg.exe for anything like.."olldbg.exe" tha's all :)
bigboss1988 26. Oct 2005	why u used winsock?!!!
OrCs236 Author 26. Oct 2005	I didn't use winsock, but the scripting language I used includes it in case I use a function that needs it.
gryzon 30. Oct 2005	Nice crackme :) Especially _SelfDestruct() and doom.bat :)
gryzon 30. Oct 2005	I think we should see temp directory and copy some file somewhere and change it to exe :) The author give us a big hint (source code), just put some break on access at 0043648d in new exe and see what eax tells us :) But I'm too newb without skills :) @bigboss1988 just look at this: If WinExists("OllyDbg") Then WinClose ("OllyDbg") _SelfDestruct() ElseIf ProcessExists("OllyDbg.exe") Then ProcessClose("OllyDbg.exe") _SelfDestruct() :)
r0bert 30. Oct 2005	OrCs236, whats tripping me up is: $SERIAL = StringTrimLeft($SERIAL, $ELLO - 60) ........ its trimming a 12 digit serial by (12-60) chars !
OrCs236 Author 30. Oct 2005	I knew autoit was too easy to crack... If you have the source how hard could a keygen be?
Lesco 31. Oct 2005	how can your serial be only 12 chars long? it's the serial _after_ encryption
jB_ 31. Oct 2005	OrCs236 : Once you have the source it is very easy to code a keygen. Check my website ( http://jardinezchezjb.free.fr ) Regards, it was easy but interesting. I didn't know this tool.

OrCs236's OrKs236 Crackme #2

Download Orks236_Crackme_#2.zip, 463 kb (password: crackmes.de)
Browse contents of Orks236_Crackme_#2.zip

As with the first one, once you obtain the source it is extremly easy to crack. Maybe in future crackmes I'll make it tougher and add obfuscation.

This Crackme has some simple protection, but I have confidence in you :D

KEYGEN IT!!!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 21. Aug, 2006
Downloads: 367

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to Orimagic »

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Discussion and comments

hardcoder 22. Aug 2006	It woluld have been more interesting if you've not used "Auto It".
HMX0101 22. Aug 2006	damn, i have solve one of this AutoIt very easy ;)

Orimagic's KeygenMe

Download KeygenMe.zip, 22 kb (password: crackmes.de)
Browse contents of KeygenMe.zip

You must enter name, team, and serial. You must look at radio buttons too (position of radio buttons its at random when start keygenMe).
Objetive is get a complete functional Keygen, including radio buttons positioning.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 11. Nov, 2004
Downloads: 878

Rating

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Solutions

Solution by gadhabi, published 20. nov, 2004; download (12 kb), password: crackmes.de or browse.

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orkblutt's Ork's crackme

Download crackme.zip, 156 kb (password: crackmes.de)
Browse contents of crackme.zip

Basicaly, that crackme take 1 parameter... the passphrase:
crakme.exe PASSPHRASE ...

Should display a congratulation message when the pass is correct

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 26. Aug, 2007
Downloads: 637

Rating

Waiting for at least 3 votes
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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

Blinky182 27. Sep 2007	This is by far the slowest app I've ever seen ;)

otmanov's CrackeMeby°Designer Shoes°

Download CrackeMeby°Designer_Shoes°.zip, 614 kb (password: crackmes.de)
Browse contents of CrackeMeby°Designer_Shoes°.zip

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 26. Oct, 2015
Downloads: 463

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by acruel, published 10. dec, 2015; download (1 kb), password: crackmes.de or browse.

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Send a message to outcast3k »

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Discussion and comments

adlers 09. Nov 2015	Newbie level ? :-)
dangokyo 10. Nov 2015	Thought it's a keygen problem at start, but actually a unpacking problem. Thanks for a good example on unpacking.
adlers 10. Nov 2015	Unpacking in this case is easy(Mpress, google/youtube is your friend).
acruel 14. Nov 2015	Weird password.
truthhk 15. Nov 2015	the key is RtlGetAssemblyStorageRoot
jhon 27. Nov 2015	key: RtlGetAssemblyStorageRoot
sussan606 28. Nov 2015	Sir can you help me in bypassing the activation key of a software which is created in VB6 please sir help me my email id is sushilkumarsingh8130068658@gmail.com
sussan606 28. Nov 2015	Can anyone help me Sir can you help me in bypassing the activation key of a software which is created in VB6 please sir help me my email id is sushilkumarsingh8130068658@gmail.com
Aether 31. Dec 2015	"Very easy" >packed with vmprotect. o.
jordan80 16. Mar, 20:18	Sorry one question, Where can i found the origin entry point (in particular code jmp loc_5E34E4)? Thanks. Bye
spyzzer 13. May, 01:47	key: RtlGetAssemblyStorageRoot , nice crackme :)
redoC 15. May, 11:12	This server is dead?
apuromafo 30. Nov, 00:04	@jordan80 yep is post the jmp oep is 5E34E4 005E34E4 > 55 PUSH EBP 005E34E5 8BEC MOV EBP,ESP 005E34E7 83C4 F0 ADD ESP,-10 005E34EA B8 9CB35D00 MOV EAX,CrackeMe.005DB39C iat: RVA: 1F09F4 SIZE: 84C iat is here: 005F09F4 77793E59 oleaut32.SysFreeString 005F1240 00000000

outcast3k's crackme

Download oc3k_crackme.zip, 118 kb (password: crackmes.de)
Browse contents of oc3k_crackme.zip

serial, name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Dec, 2000
Downloads: 1727

Rating

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Solutions

Solution by tscube, published 02. dec, 2000; download (15 kb), password: crackmes.de or browse.

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outcast3k's crackme #2

Download c_o3kcm2.zip, 146 kb (password: crackmes.de)
Browse contents of c_o3kcm2.zip

serial, name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Apr, 2001
Downloads: 2065

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by nh, published 18. apr, 2001; download (2 kb), password: crackmes.de or browse.

Votes: 3
Crackme is nothing special.

Rate this crackme:

Send a message to Ox87k »

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Solutions

Solution by boonz, published 22. may, 2007; download (105 kb), password: crackmes.de or browse.

boonz has not rated this crackme yet.

Solution by znycuk, published 27. apr, 2006; download (3 kb), password: crackmes.de or browse.

znycuk has rated this crackme as quite nice.

Solution by talmen, published 27. apr, 2006; download (44 kb), password: crackmes.de or browse.

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Send a message to Ox87k »

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Discussion and comments

playar 25. Apr 2006	(0x68-1)^0x87 = 0xE0 (0x90-1)^0x87 = 0x8 ?????????
D3z+ 26. Apr 2006	Hello, It seems to me that a keygen is not needed. Just type there characters... Ã xÃ˜Â¸xmâ€12345678 The numbers from 1 to 8 can be anything :) D3z+
Ox87k Author 26. Apr 2006	yep D3z+! ;) this is a way to solve it... but this part Ã xÃ˜Â¸xmâ€ can be various!
D3z+ 26. Apr 2006	Yeah.. i know, cause is the missing code :) really interesting stuff, i'll write a tut asap! Ciao! :)
playar 27. Apr 2006	maybe it's only for english language system :(
TQN 27. Apr 2006	My serial will patch the code like: 00401111 push cRy0k.00406000 00401116 push 6A 00401118 push [arg.1] 0040111B call <jmp.&user32.SetDlgItemTextA>
Ox87k Author 29. Apr 2006	Very g00d tuts boyz! Thanks all for ur try! @playar: my language system is italian ;) 'nJoy!
HMX0101 29. Apr 2006	Ox87k: waiting another good crackme... nice job!
D3z+ 03. May 2006	0x87k, my language sys is the same! :)

Ox87k's kEYGENME#1 : +gAs+

Download +gAs+.zip, 73 kb (password: crackmes.de)
Browse contents of +gAs+.zip

~~~~~~~~~~~~~~~~~~~~~
0x87k : presents : +gAs+
~~~~~~~~~~~~~~~~~~~~~
Coding: C++
Packing: Yep!
Protection: Crypto
Level: 3/10 (i'm not sure!)
~~~~~~~~~~~~~~~~~~~~~

Mission:
+ Write a tutorial for crackmes.de
+ Write a working keygen

~~~~~~~~~~~~~~~~~~~~~

NOT ALLOWED:
+ Self-Keygenning
+ Loader
+ Patching

Only a keygen with tutorial
Please read "Readme.txt"

~~~~~~~~~~~~~~~~~~~~~
Take care,
0x87k
~~~~~~~~~~~~~~~~~~~~~

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 05. May, 2006
Downloads: 1084

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by Crosys, published 19. jun, 2006; download (239 kb), password: crackmes.de or browse.

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Solution by HMX0101, published 15. jun, 2006; download (99 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k Author 06. May 2006	thanks for comment but plz, no post serial or something like this! Serial fishing is very easy because the final serial is clear in the stack! It's a keygenme so.... kEYGEN iT! :P
saytos 06. May 2006	i registered recently. sorry...=)
HMX0101 06. May 2006	SHA-1 (maybe modified), this time i can't crack this :D @Ox87k: a little question... oraculum is permitted as valid solution? btw, nice gfx...
indomit 07. May 2006	Sorry for offtopic: Can anybody tell me, what meaning of "Serial Fishing" and "Self-Keygenning"? Plz... :/
l0calh0st 07. May 2006	indomit Serial fishing is finding a serial for your name........while self kegenning makes the proggy to display correct serial for the name entered..
l0calh0st 07. May 2006	and nice effects Ox87k :)
indomit 07. May 2006	l0calh0st, thanks a lot :)
Ox87k Author 07. May 2006	@HMX0101 a little question... oraculum is permitted as valid solution? what means this? sorry but... what's oraculum?!?! :\| however yes, is sha1 not modified (only the initialized numbers). Why u can't crack this? @For all: thanks! =)
HMX0101 07. May 2006	"Informatically speaking, an oraculum is a loader, an external program which executes the target program and does some memory patching in order to obtain some information such as usually the serial code, and then it reports those things to the user. An Oraculum is not a self-keygen (an application patched to reveal its real serial), because the original application isnâ€™t patched on disk, isnâ€™t only a loader because the application is closed when the required information are found (usually the real serial) and the application isnâ€™t patched to avoid limitations, it is something different, itâ€™s simply an Oraculum..." Oraculum Tutorial by Shub-Niggurrath http://tutorials.accessroot.com
Ox87k Author 07. May 2006	ah ok!! i now understand what do u means but in my readme.txt i wrote: NOT ALLOWED + Loader however... i can accept ONLY ONE solution with oraculum/loader, the others MUST BE ONLY kEYGEN+TUTE! ;)
HMX0101 13. May 2006	load the oraculum, press get a serial, now put a name in the keygenme press check, wait a moment and the right serial is putted in the textbox of the oraculum.
indomit 13. May 2006	for me oraculum work if first I run keygenme... next I do the said steps.
Ox87k Author 13. May 2006	@hmx0101 SORRY : I deleted ur post for my mistake! however... here is the oraculum by HMX0101: http://rapidshare.de/files/20363315/Oraculum_Keygenme_1.zip.html I've tried many times but still nothing.. someone other can try this plz? another sorry HMX0101! :'(
Ox87k Author 31. May 2006	does nobody succeeds to make a keygen and a tutorial for it?? it's not very hard, only sha1 not modified... if somebody need hints, maybe i can help...
HMX0101 31. May 2006	Sha1 its very easy, but i don't know what are doing the crackme in this part (a little down, some similar): 0040804C > \6A 01 PUSH 1 ; This is passed with different numbers 0040804E . 8D8C24 480200>LEA ECX,DWORD PTR SS:[ESP+248] 00408055 . 55 PUSH EBP 00408056 . 8D9424 000100>LEA EDX,DWORD PTR SS:[ESP+100] 0040805D . 51 PUSH ECX 0040805E . 8D8424 A00200>LEA EAX,DWORD PTR SS:[ESP+2A0] 00408065 . 52 PUSH EDX 00408066 . 50 PUSH EAX 00408067 . 81EC C4000000 SUB ESP,0C4 0040806D . B9 31000000 MOV ECX,31 00408072 . 8DB424 500600>LEA ESI,DWORD PTR SS:[ESP+650] 00408079 . 8BFC MOV EDI,ESP 0040807B . F3:A5 REP MOVS DWORD PTR ES:[EDI],DWORD PTR DS:[ESI> 0040807D . E8 3E040000 CALL +gAs+.004084C0 ; i don't know exactly what are doing the crackme in this call I hope that you can help me :D Anyway, very good crackme.
Ox87k Author 31. May 2006	eheheh the routine is all them! :P however, in simple words: 0040804C > 6A 01 PUSH 1 ; ; push var we call this var "countertimes". At offset 0040807D u have a call... in this call the crackme get the value of eax and the len(name) (ebp) and calculated "countertimes" times the sha1 of eax. If the countertimes is 1 then we have the 'normal' hash of eax ('normal' but be careful to sha1 initials dwords) else we have a cicle........ Sorry for my bad english, i hope u understand now.. I also hope to see a keygen and a tutorial soon! :)
l0calh0st 01. Jun 2006	Waiting for someone to submit solution..i want to learn these crpto stuff..Maybe HMX is near to completing it
HMX0101 02. Jun 2006	The 1st time it use the modified default dwords of initialization and the another time it modify the dwords... Is this right?
Ox87k Author 03. Jun 2006	nope! the dwords are always the same ones! :) it is easier than that you think!!
HMX0101 03. Jun 2006	The 1st time, it take the normal hash of the name, after this it load in a variable the first 8 chars of the last hash X times, but where is used this value?
Ox87k Author 03. Jun 2006	name -> sha1 -> hash1 hash1 (with len=8) -> sha1 -> hash2 etc...
HMX0101 12. Jun 2006	I have submitted my solution for this crackme! This crackme can confuse to everybody that play with it... Anyway, good job Ox87k... Waiting for another good challenge!
Ox87k Author 15. Jun 2006	very very very good job hmx0101 and finally someone has solved it =) Another thanks to have tried it (specially hmx0101)
HMX0101 15. Jun 2006	Thank you, for this nice challenge! I'm waiting the next challenge!!!
Crosys 18. Jun 2006	Solved. Can write tutorial if you guys want 1 more....
Ox87k Author 18. Jun 2006	Good work x15or =) write and submit!
HMX0101 18. Jun 2006	@Ox87k: how you can make the effect in the gfx? it's cool :D
l0calh0st 18. Jun 2006	Yeah that effect is cool...have seen in some CORE keygens...Maybe Ox87k can reveal something :)
Ox87k Author 18. Jun 2006	hum... i've seen one time in a official keygenme by ROR and after some searches i found it here (the code is public) http://codeproject.com/bitmap/specialfx.asp =)
HMX0101 18. Jun 2006	Thanks!!!, i like this effect :p
l0calh0st 18. Jun 2006	Yeah...thanks ...nice project :)
Ox87k Author 18. Jun 2006	@x15or: u can write another solution :) Ur keygen has a very nice cool gfx :D

oXYgen's PatchMe #1

Download PatchMe.zip, 898 b (password: crackmes.de)
Browse contents of PatchMe.zip

This is a PatchMe

Read the RedaMe File for all the informations. Try to make something fun !

Have Fun Reversing ! ;D
oXYgen

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 25. Apr, 2015
Downloads: 1090

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Solutions

Solution by acruel, published 23. sep, 2015; download (2 kb), password: crackmes.de or browse.

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Solution by givses, published 29. jul, 2015; download (3 kb), password: crackmes.de or browse.

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Solution by downabc, published 05. may, 2015; download (2 kb), password: crackmes.de or browse.

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Solution by Kirjava, published 05. may, 2015; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Kirjava 25. Apr 2015	Feels weird when the patch is as big as the program itself. :)
oXYgen Author 25. Apr 2015	With this PatchMe I want to see something epic ! So normaly if you do something very good, your patched file will be more big !
downabc 27. Apr 2015	Hi oXYgen, my patch is smc args of messagebox. I add alot of code to the one submitted in order to call VirtualProtect to gain writable access of code section. If i just modify the section header, the patch code would be 15 bytes aprox. Modification of string is not in count.
oXYgen Author 18. May 2015	Thanks for your solutions :D

oxygen240's Find the password

Download crackme.zip, 3 kb (password: crackmes.de)
Browse contents of crackme.zip

It's my first crackme in C.

You've just to find the good password !

Please submit your solution if you find it.

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: C/C++

Published: 15. Apr, 2007
Downloads: 828

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Solutions

Solution by b0ne, published 27. apr, 2007; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

b0ne 28. Apr 2007	there's probably no other way but bruting the key(s)
mrcool 20. Feb 2014	this is a PE exe (windows), not DOS
elicn 25. Feb 2014	I agree with b0ne. This some sort of a hash check and there is probably no way to reverse it to get the key. However I came as close as I could by guesstimating the suffix as "IL7".

PAGMAN's PAGMAN BitCrypt

Download PAGMANs_BitCrypt.zip, 39 kb (password: crackmes.de)
Browse contents of PAGMANs_BitCrypt.zip

Obfuscation is irreverent when you compare it to this. You WILL NOT crack this. The code is easily visible in .NET Reflector. There is no need to hide it. This can NOT be reversed. You either are licensed to run it or you aren't'; it's that simple.

The method of protection is simple, but has never been used (to my knowledge).

If you successfully crack it, post the message that is displayed.

Have fun! :D

Difficulty: 9 - You can't solve this yourself :)
Platform: Windows
Language: .NET

Published: 11. Aug, 2010
Downloads: 921

Rating

Votes: 4
Crackme is boring.

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Solutions

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Discussion and comments

Coderess 11. Aug 2010	>This can NOT be reversed. This is rash opinion
PAGMAN Author 11. Aug 2010	Go ahead and prove me wrong :)
TQN 12. Aug 2010	Can you rebuild your crackme with .Net framework below 4.0 (2.0, 3.5...)
buganxin 12. Aug 2010	yes , please rebuild it with .net framework 3.5 or below.
cyclops Moderator 12. Aug 2010	I have seen these kind of protection(though I dont remember the name). This protection cannot be applied in real life licensing schemes. If I bought a licensed copy, which is encrypted with my CPUID, I can just dump the decrypted IL, do some hex patching and make a fully functional product. Its like giving a password protected ZIP file, once it is unzipped everyone can copy it :P Now coming to the protection, processor id is a 64bit number, so you can start brute forcing from 0 to (2^64)-1. (Someone trying it?? :P) It seems the author has overlooked at the processor id. Processor id is not a serial number that is just different for every processor. It is the result of instruction CPUID when executed with EAX = 1. This will give the feature list of the processor like x87 FPU on Chip, APIC on Chip etc. So the probability of finding a system with same CPUID is pretty large(for a licensing scheme). I have tested with couple of PCs and result is: Core 2 Duo: BFEBFBFF000006FD Athlon x2 4600+: 178BFBFF00040F33 Athlon x2 4600+: 178BFBFF00040F32 Dual Core: BFEBFBFF0001067A Athlon x2 5600+: 178BFBFF00040F33 Perfectly brute forcible if you know authors processor type and series : D Again to math, there are 7 reserved bits(set to 0 by default), so you can optimize the brute force a little bit, and you may assume many of the bits to be set(just assumptions, may be I am wrong). Ok, enough BS, can you solve it? may be/may be not, I am not gonna brute force!
PAGMAN Author 13. Aug 2010	I will rebuild it...
mazuki 17. Feb 2011	i will start work on this one i think, should be a good .net project to start off with, cyclops, one question.....you got odd results for your CPUID, shouldn't bit 31 returned by 0 always as they default to that? when i run CPUID i get 0 for all processors in this bit location
cybercrz 14. Apr 2012	stupid crackme... only licenced for only processor... can only be decrypted with one processor hash.. that's why he said this cant be reversed...
.Net 15. Jan 2013	It could be reversed, when you bypass the CPU Check!
loizos 31. Mar 2013	Any program can be reversed if you try crack this program without reversing it its like throwing eggs on the wall
upsurt 06. Jan 2014	Content blocked While trying to retrieve the URL:http://crackmes.de/users/pagman/pagman_bitcrypt/download/PAGMANs_BitCrypt.zip The content is blocked due to the following condition: The item you have requested is infected by a virus. It will not be downloaded. Report: TR/Dropper.MSIL.Gen
zairon Moderator 07. Jan 2014	Don't trust everything they tell you, antivirus are not perfect.

Paic_citron's Paic_citron_1

Download paic_citron.zip, 247 kb (password: crackmes.de)
Browse contents of paic_citron.zip

I think this is a new kind of protection,enjoy it!

Difficulty: 7 - Very hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 13. Aug, 2003
Downloads: 1435

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Solutions

Solution by divinomas, published 04. jan, 2005; download (2 kb), password: crackmes.de or browse.

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Paic_citron's Paic_Citron_KeygenMe#2

Download Paic_Citron_-_KeygenMe#2.zip, 28 kb (password: crackmes.de)
Browse contents of Paic_Citron_-_KeygenMe#2.zip

You have to find a valid serial.

The only protection is the serial ...!

This is a kind of headache... :D

Good luck

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 28. Nov, 2005
Downloads: 545

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Discussion and comments

Paic_citron Author 04. May 2008	This is a kind of rubik's cube mixed with a zelda-like gameplay... But no GUI of course ;) No solutions since Nov 2005 !!! Please find this fu**ing serial !!!

palto's CrackMe_Palto

Download CrackMe_Palto-2.zip, 177 kb (password: crackmes.de)
Browse contents of CrackMe_Palto-2.zip

XP/Vista.
See ReadMe

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 31. Oct, 2007
Downloads: 344

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Solutions

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Discussion and comments

simpleuser 01. Nov 2007	I can't find a good way to make a keygen yet, because I can't catch the generated GUID. However, serial fishing is straightforward, and the whole AutoHotkey script is extractable from memory / via tools so you can just rebuild the same application without the protection, or to build a keygen (provided your keygen has the correct GUID)
palto Author 21. Nov 2007	Anybody tried this / workin on this?

pancake's pcme0

Download pcme0.tar.gz, 4 kb

This is my first crackme and I don't wanted to make't extremily difficult, but for begginer eyes will look like that, take care about the code and beware the antidebugging tricks!,

This crackme exposes some new tricks for avoiding disassembling and debugging, but don't panic! This crackme is somewhat a PoC, and some "features" are just to aware you and make you take care.

The code has not been optimized, so functions will be longer to read, It is a dynamically linked binary with -fPIC.

What you have to do is to get the correct password when running the unpatched crackme directly from the shell.

No restrictions/rules for this crackme.

So have fun! :)

xref: http://news.nopcode.org/miau/wk/pcme

Difficulty: 4 - Needs special knowledge
Platform: Unix/linux etc.
Language: C/C++

Published: 24. Dec, 2007
Downloads: 449

Rating

Votes: 4
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Solutions

Solution by rookie, published 14. jan, 2008; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

rookie 14. Jan 2008	Well done Pancake :) Keep on going. This is tough, but fun too. Gives good insight into linux processes and signals.

papanyquiL's KeyMe

Download KeyMe.zip, 6 kb (password: crackmes.de)
Browse contents of KeyMe.zip

This is my first keygenme submitted. It was made and intended for beginners. Once solved, I will post my source code (if requested). Again, this is for beginners, if you're an accomplished cracker :P, this will probably be quite boring!

Rules:
*No brute-forcing
*No patching
*Create a working keygen

A special thanks to T.0.R.N.A.D.0. for giving out some of his source code to help me out in my quest for higher knowledge. :D

-papanyquiL

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 19. May, 2009
Downloads: 779

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by Filler, published 23. may, 2009; download (9 kb), password: crackmes.de or browse.

Filler has rated this crackme as nothing special.

Solution by arashrj, published 23. may, 2009; download (5 kb), password: crackmes.de or browse.

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Solution by The So;X, published 23. may, 2009; download (1489 kb), password: crackmes.de or browse.

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Discussion and comments

papanyquiL Author 23. May 2009	Good job to everyone who made a solution, and everyone who solved it. :P My next one is a bit harder.
Psycho 29. May 2009	:) i like it. I'm a Beginner to this.. it took me a good half-hour to get it right finally. Keep them Coming :) i enjoyed it. my second KeyGen that actually worked
papanyquiL Author 29. May 2009	Will do :P I have a couple others for beginners that are out now as well.
wibf 23. Aug 2009	hey i solved it why the sunmission of solution is closed

papanyquiL's KeyMe #2

Download KeyMe_#2.zip, 7 kb (password: crackmes.de)
Browse contents of KeyMe_#2.zip

The #2 in my 'KeyMe' series.. Promises to be much better (and more difficult) than my first.
Rules:
*No patching
*No brute-forcing
*Please write a small tut when solved

Much appreciation toward T.0.R.N.A.D.0. and obnoxious for the help of their source code to aid me in my quest for higher knowledge. :D

*****On a side note, DO NOT open this program if you're epileptic...*****

-papanyquiL

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 21. May, 2009
Downloads: 662

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by The So;X, published 23. may, 2009; download (384 kb), password: crackmes.de or browse.

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Solution by MCxCodex, published 23. may, 2009; download (6 kb), password: crackmes.de or browse.

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Solution by arashrj, published 23. may, 2009; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

obnoxious 21. May 2009	Awesome graphics. :)
papanyquiL Author 21. May 2009	Thanks :D, I noticed after staring at it a while that it kind of makes me dizzy though... lol
T.0.R.N.A.D.0. 22. May 2009	Nice gfx, really :)
papanyquiL Author 22. May 2009	you all should try solving it and submitting a tut, though it is intended for beginners... :P
T.0.R.N.A.D.0. 23. May 2009	But it's too easy, so I leave it to a newb. I lack time these days, so can't write a tut :p I really don't understand the need of checking for a key-file. The password and the contents of key-file are exactly the same !
papanyquiL Author 23. May 2009	yeah, it's pretty much just there to be a nuisance
Filler 24. May 2009	I agree with T.0.R.N.A.D.0. If the keyfile doesn't exist, the key is not correct, it will crash... But the KeyMe is nice, harder than first. If you obfuscate it and complicate the algo it will be more difficult.
papanyquiL Author 24. May 2009	Yes, the keyfile existing is just to simulate a real program using keyfile authentication, as well as a password for your username. Still, I made fairly simple for beginners.
DaHandy 28. May 2009	Doesn't work for me because it tries to find the keyfile from "C:\WINDOWS\key.txt", but I have my windows installed on drive J... You should change that to something else. :/
T.0.R.N.A.D.0. 28. May 2009	I always prefer "%windir%" instead of "C:\" ;)
T.0.R.N.A.D.0. 28. May 2009	sorry, in the last post I meant "C:\WINDOWS\"
papanyquiL Author 28. May 2009	thanks for the advice, i'll get on it :P

papanyquiL's KeyMe #3 (Fish Edition)

Download KeyMe_#3_(Fish_Edition).zip, 6 kb (password: crackmes.de)
Browse contents of KeyMe_#3_(Fish_Edition).zip

KeyMe #3 (Fish Edition) - #3 in my KeyMe series.. Hopefully you'll figure out why I call it the 'Fish Edition.'

Hopefully you all enjoy it :D
Rules:
*I don't care... do whatever you want... but please make a keygen :P
*Write a small tut

Much appreciation toward T.0.R.N.A.D.0. and obnoxious for the help of their source code to aid me in my quest for

higher knowledge. :D

-papanyquiL

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 27. May, 2009
Downloads: 783

Rating

Votes: 4
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Solutions

Solution by The So;X, published 01. jun, 2009; download (2294 kb), password: crackmes.de or browse.

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Solution by wantondamage, published 01. jun, 2009; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

T.0.R.N.A.D.0. 27. May 2009	(1) What do you mean by "ALL names" ? Including the ones less than 7 chars long ? %) (2) Do you want a key valid for all names (i don't think that's possible), or valid keys for all names (that's what a keygen does, so what's special) ?
papanyquiL Author 27. May 2009	@T.0.R.N.A.D.0 No, I tried to make it where it would use a different encryption scheme based on the length of your name. This is what I mean by creating a valid keygen for all names (if it works eh?). P.S. I re-uploaded a fixed version, should make it a bit harder... or just more a pain in the rear :P
The So;X 27. May 2009	ok k-gen is done i am uploading solution
papanyquiL Author 27. May 2009	@The So;X Is your tutorial compatible with the re-uploaded version? If not, nobody will know what you're talking about lol.
The So;X 27. May 2009	ya i just uploaded it ,it is flash tutorial ... by the way nice one...;)
papanyquiL Author 01. Jun 2009	Fantastic solution So;X :P

papanyquiL's papanyquiLKGM

Download papanyquiLKGM.zip, 52 kb (password: crackmes.de)
Browse contents of papanyquiLKGM.zip

My first time making a crackme in C++, and my first time doing any real coding in C++ to be exact.. ***Praise online learning resources*** Very simple encryption, try and crack it. :D

Rules:
*No patching
*No brute-forcing
*If you're not too busy, make a valid keygen and tut -_-

Greetz to all my friends at crackmes.de

-papanyquiL

P.S. - If you're saying to yourself, "Wow, this guy has posted 3 crack/keygenme's in 3 days. He must be some kind of non-sleeping craftaholic..." Yes, this is pretty much ALL I do now. My new found hobby. Thanks for everyone's support through my learning of the trade.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 30. May, 2009
Downloads: 897

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by MCxCodex, published 03. jun, 2009; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

The So;X 30. May 2009	nice one....u r really a fast learner DUDE:::
papanyquiL Author 30. May 2009	Thanks So;X! I still have a long way to go though ;P
tony 31. May 2009	it's so easy, just transformation
papanyquiL Author 31. May 2009	@tony ^yes :D
Ganoes Paran 31. May 2009	Spoiler-ish -- -- -- -- -- -- Caesar shift ciphers ftw. Lucky for me, i've been making a C++ encryption program just to practice out my coding skills. encryption like standard coding like backwards encryption, Caesar, Polybius(sp?) board, etc. so lucky for me, i can make a keygen really quick =) sooo i'll be making a keygen when i have time, tad bus right now but yea..
Ganoes Paran 31. May 2009	ok solution, keygen, and keygen source w/ explanation are ready. going to submit yea, the keygen is like 500 kb but tbh, i dunno why its that big. ever C++ project i complile with dev-C++ is that big, even if it's 4 lines of code lol
skynetuniverse 01. Jun 2009	I have the solution, its pretty simple, but have had a hard time to figure where the serial is computed! Good job papanyguiL
The So;X 01. Jun 2009	@Ganoes Paran,@skynetuniverse,@tony please submit solution , I calculated solution but my k-gening in ASM is really sucks...:(
junkey 01. Jun 2009	Nice one. solved.
Wasted_Bytes 01. Jun 2009	@Ganos You use the iostream.h i bet that's why the final executable is so big
Ganoes Paran 01. Jun 2009	mm yea, i always use iostream so yea, i guess that's the problem, thanks m8! really appreciate it! @ The So;X: I already submitted like a minute before my last post (01. Jun, 01:10) it's being reviewed. on the left side of the screen, on the que, the 4th solution in queue is mine and so is the one crackme in queue lol (as of 11:47 AM, Mountain time - kinda just woke up so sorry for any mistakes in this text)
Ganoes Paran 01. Jun 2009	ok, crackme.de is 8 hours ahead of me so almost 20:00 then
The So;X 01. Jun 2009	@ Ganoes Paran I also submitted crackme of this author may be 4 days back but didnt get any reply yet...:(
Ganoes Paran 01. Jun 2009	yea well. 2 solutions left in que, and mines the first or second so yea... buut i'm better coding then cracking so meh, explanation might be kinda lacking by keygen does the work i also just finished coding an 'upgraded' version of this crackme by papanyquiL. it'll be alot tougher, hope you'll have fun with it lol
tshock 05. Jun 2009	spoiler: "\n\n"
fred777 10. Jun 2009	Yes, done, its a nice simple crackme ;)
papanyquiL Author 10. Jun 2009	Thanks to everyone who gave this crackme a try! :P
Zakne 26. Jun 2009	you know there is a bug, when you open the crackme hit two times enter and is say's " you did it" :P

papanyquiL's papanyquiL CrapME

Download papanyquiL_CrapME.zip, 190 kb (password: crackmes.de)
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Well, it's been a while since I've been in the crackmes.de scene, so I decided to come back with yet another crackme. This one is just a tad bit harder (besides, everyone loves games).

Rules:
(*) No Brute-Forcing
(*) No Patching
(*) When solved, please submit a tutorial and valid keygen

For tutorials, tools, and help on ALL RCE topics, please visit BlackStorm Reverse Engineering team at: http://portal.b-at-s.info

Greetings to Kurapica, revert, Apakekdah, SRC, lena151, obnoxious and everyone else contributing to BlackStorm!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 19. Sep, 2009
Downloads: 655

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by sacad, published 12. oct, 2009; download (280 kb), password: crackmes.de or browse.

sacad has rated this crackme as quite nice.

Solution by Digmi, published 26. sep, 2009; download (234 kb), password: crackmes.de or browse.

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Discussion and comments

sacad 22. Sep 2009	got keygen... tutorial will be at the weekend :) i'm still busy
papanyquiL Author 02. Oct 2009	Nice tut digmi, but you forgot an important step for those who might have VS 2008 installed with the corresponding SDK :P

#ParadoxX's AC1D Materie

Download Acid_Materie.zip, 129 kb (password: crackmes.de)
Browse contents of Acid_Materie.zip

Good Evening:
Rulez:
-No Patching

Goal:
-Write a keygen.

written by #ParadoxX[AC1D]
presented on crackmes.de

The legal way to reverse software!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 09. Mar, 2010
Downloads: 1071

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by DjH2oo7, published 11. mar, 2010; download (422 kb), password: crackmes.de or browse.

DjH2oo7 has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

freesoul 09. Mar 2010	can't input second serial, is it normal??
Xspider 09. Mar 2010	i thinks it is not!!
freesoul 09. Mar 2010	Level 3? xor encryption? =)
KKR_WE_RULE 09. Mar 2010	Hey, It often doesn't allow me to enter the 2nd serial.. Is this how it is supposed to work ?
DjH2oo7 09. Mar 2010	Downloaded, reversed, solved, keygen written, submitted. But I think it isn't level 3 but something about 1.5.
DjH2oo7 09. Mar 2010	Yes, and I forgot: some tutorial written :-))
Anicona 09. Mar 2010	@freesoul: you can only enter integers as serial @DjH2007: then I can save my time (writing a tutorial) ;) though I agree with you: one loop "masking" a static xor is definitely not level 3.
#ParadoxX Author 10. Mar 2010	i dont know why u cant enter the second serial sometimes... its works with me. and yeah i already got a solution by freesoul :D ok its not level 3 ...
BlackCode 12. Mar 2010	i cant input second serial too
Kaparoni24 19. Apr 2010	It's quite simple . All you have to do is to change JE SHORT 004014D4 coming before the "pause" to JMP and walla ! It's working. I tought "Maybe the pause value checking the validation of the serials so if I'll change the value to JMP it will works "
madmaurice 18. Jul 2010	@Kaparoni24 I think you didnt get the point: NO PATCHING means you just look at the disassembled code, but you are not allowed to modify it.
madmaurice 18. Jul 2010	Not workin for me either. cant enter 2nd serial.

parfen's KeygenMe

Download Crack_me.zip, 28 kb (password: crackmes.de)
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To beat this crackme, you need:
- describe the algorithm of creating password(corresponding to login);
- Make a keygen to insert your data
inside the crackme to register the crackme
- Write a tutorial

attn counter HKCU\Software\maddy

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 09. Jun, 2008
Downloads: 387

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Solutions

Solution by obnoxious, published 16. jun, 2008; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

obnoxious 10. Jun 2008	silly way of saying congratulations :)
simonzack Moderator 10. Jun 2008	agree, makes my computer stuff up a while x_x
parfen Author 10. Jun 2008	For obnoxious: Crack is VERY easy. The sense in finding the way of creating password and making keygen. So, obnoxious did not find solution.
obnoxious 10. Jun 2008	"So, obnoxious did not find solution." what does that suppose to mean?
parfen Author 11. Jun 2008	obnoxious, There was your comment where You make a promise to produce the solution soon. Who deleted that comment? silly way to make a promise :))
parfen Author 19. Jun 2008	excellent! Obnoxious can keep his word. Respect to those who dont waste words
obnoxious 20. Jun 2008	thanks parfen...............

paththeir's PathTheir's CrackMe #1

Download crackmePath1_(1).zip, 4 kb (password: crackmes.de)
Browse contents of crackmePath1_(1).zip

Hello and welcome to my first keygenme!
This one is simple enough. Something can drive you crazy.
KEYGEN is needed as a solution.

Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 01. Jul, 2013
Downloads: 367

Rating

Votes: 8
Crackme is quite bad.

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Solutions

Solution by B@zz!, published 10. jul, 2013; download (12 kb), password: crackmes.de or browse.

B@zz! has rated this crackme as boring.

Solution by coligny, published 10. jul, 2013; download (20 kb), password: crackmes.de or browse.

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Solution by fish2fry, published 10. jul, 2013; download (171 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

paththeir Author 28. Jun 2013	It was a little hint. (You guessed right)
paththeir Author 28. Jun 2013	If you solved it, write a tutorial about how did you found the algorythm and, optionally, which are the best parts of protection and which are worst.
fjlj 29. Jun 2013	for a first keygenme this is not bad. very simple and i will actually be using it as an easy demonstration of reverse engineering on my youtube channel in the following weeks :) keep it up!
seVeb 29. Jun 2013	this crackme actually motivated me to start learning C :)
paththeir Author 29. Jun 2013	I'm happy with your comments! Thanks! Oh, I really want to see this reverse engineering video. Please, send me a message with link when it's ready
iSSoGoo 30. Jun 2013	There is no serial for strings containing a 'w' since 0x77^0x08 = 0x7F (DEL)
paththeir Author 01. Jul 2013	Yep, shit happens. Thank you.
Jacker31 02. Jul 2013	Hi , i able to crack it and my solution is currently being reviewed by moderators. But its good one and yea it is not the easy one :D
paththeir Author 02. Jul 2013	blueatirec, you're right, but don't spoil things, please
Mr. eXoDia 02. Jul 2013	hi, nice trick with this function from stdlib!
paththeir Author 03. Jul 2013	Thanks. My brain is very pleased to hear that
B@zz! 04. Jul 2013	Solution incomming
evaboy 08. Jul 2013	Though am about to submit my own solution, this is a good programming idea AND the proTection idea is loose enough for newbies to start the race.
paththeir Author 09. Jul 2013	Thanks. It was supposed to be so.
WiNC0de 11. Jul 2013	My brain hurts. Not so easy.
paththeir Author 11. Jul 2013	Oh, I'm really sorry. You probably need to take a break. Have some coffee or tea.
oonhokproo123 15. Jul 2013	my computer can open your crackme
oonhokproo123 16. Jul 2013	my computer can't open your crackme
paththeir Author 16. Jul 2013	OK, I vere visiting X-Men lessons, but from here I can't read your computer configuration. I'm really sorry for that and for non-working CrackMe. That's my fault.

pdrill's pDriLl's Crypto Keygenme #5

Download pdr-keyg5.zip, 46 kb (password: crackmes.de)
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pDriLl's Crypto Keygenme #5
This one is Elliptic Curve. Your task is to make a keygen. No more no less.

-pDr

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 19. Aug, 2004
Downloads: 1777

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Solutions

Solution by TaGaDaPaF!, published 31. aug, 2004; download (95 kb), password: crackmes.de or browse.

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Solution by Amenesia, published 30. aug, 2004; download (40 kb), password: crackmes.de or browse.

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Discussion and comments

pdrill's pdr-keyg4.exe

Download pdr_keyg4.zip, 53 kb (password: crackmes.de)
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pDriLl's DSA keygenme nr. 4

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 22. Apr, 2003
Downloads: 1842

Rating

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Solutions

Solution by the hoax, published 05. apr, 2009; download (158 kb), password: crackmes.de or browse.

the hoax has rated this crackme as quite nice.

Solution by Amenesia, published 06. aug, 2003; download (55 kb), password: crackmes.de or browse.

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Discussion and comments

peptido's Pep's Crackme - Take 1

Download PepCrackMe1.zip, 21 kb (password: crackmes.de)
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I'm not really sure about the difficulty of this crack.
Even though it's written in VB (and I DO know that makes things much simpler), I think I put a creative spin on this one that would make it harder to crack.

Let's see how hard it is for you to break it.
Good Luck
Pep"

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: (Visual) Basic

Published: 24. Jun, 2005
Downloads: 370

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

ap0x 30. Jun 2005	I have solved first part but when the file is started solo it produces a tipical VB error 438 (Object does not support this property or method). In Olly i just pass an exception and it work ok, but solo no :( Is this a programing error?
Oorja-HalT 30. Jun 2005	Look for it . There is a dll file in it. You need to register it using regsrvr path of the dll file/dllfilename then it would work ok
ap0x 30. Jun 2005	I registered .dll file, reversed part one. But even if the serial for part one is correct program produces an exception. This can be ignored only if you pass exception with Olly.
Oorja-HalT 30. Jun 2005	sorry that has a haste repost. Yes indeed if you do change the LicCode as per the strcmp it generates the above error code.
ap0x 30. Jun 2005	What do moderators say? Is this a programing error and should this partial solution be a full one. Providing that we patch the 'error' inside .exe
peptido Author 02. Jul 2005	Dear reversers, Thanks for trying my crack. It is not a programming error. That part is the actual protection you're supposed to overcome. If you put on the right serial, then you won't get that error, but solving first part will not give you the right serial ;-) Good luck to you all
ap0x 02. Jul 2005	Where have i heard this one before... It is not a bug it`s a feature :) Just a little humor... Ok, so it isn`t an error then i guess i will have to work harder...
kao 27. Jul 2005	Exception comes from calling a function in DLL (using rtcCallByName) that does not exist. It is up to cracker to "guess" that name.. ;) Also, this crackme relies on unknown length and contents of LicCode. The serial ap0x and Oorja are talking about, is only the rightmost part of LicCode. There is nothing really hard in it, so as soon as someone gets one valid solution, lots of solutions will appear..
peptido Author 27. Jul 2005	kao, If you had one valid e-mail address/serial pair... How hard would it be to find the serial for ANY e-mail address? (it is valid to patch the DLL if you want, you don't have to actually make a keygen) If I gave you a valid e-mail address/pair, could you do this?
kao 28. Jul 2005	peptido, I gave enough hints to get Oorja and ap0x back on right track.. Oorja surely can break this.. :) If I had one valid email/serial, I could write a keygen in 10-20 minutes (string operations + MD5 is not hard). Hard and boring part is to analyze all those Mid(), Val() and Random() calls and results. Patching a DLL is easy, I already did that (fixed rtcCallByName to call correct function). Nothing interesting in it..
peptido Author 28. Jul 2005	I understand. How did you find what was the right name for the function to be called, to be able to patch the call to rtcCallByName?

pgc's pgc trial crackme

Download pgc_kgme.zip, 23 kb (password: crackmes.de)
Browse contents of pgc_kgme.zip

crypto

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 14. Mar, 2000
Downloads: 1689

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Solutions

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Solutions

Solution by haggar, published 07. feb, 2006; download (42 kb), password: crackmes.de or browse.

haggar has rated this crackme as quite nice.

Solution by el_vena, published 08. nov, 2004; download (12 kb), password: crackmes.de or browse.

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Phoenix87's Phoenix3

Download Phoenix3.zip, 60 kb (password: crackmes.de)
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A Name-Serial-Activation Crackme with up to 3 Easter Eggs. Read the Readme.txt file included in the crackme archive.
Have fun solving this crackme!!!"

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 22. May, 2005
Downloads: 949

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Solutions

Solution by haggar, published 27. may, 2005; download (71 kb), password: crackmes.de or browse.

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Discussion and comments

code_inside 24. May 2005	This CrackMe occasionally crashes on my system :/ I'm running Win2K SP4. I haven't figured out exactly why this happens but i think because the CrackMe doesn't preserve certain registers in the window loop... It crashes in the About and Register window... Anyone else also experiences this?
haggar 24. May 2005	Don't know. On my xp pro sp1 it runs normaly without problems. Also I tried it on my systers old machine with win98 and there I didn't have problems too. Btw, author sad that we have make keygen for both .exe's, but both files are completley the same with same algo!?! What's point of sending two indentical files with different names?
Phoenix87 Author 24. May 2005	Obviously the two .exe files use the same algo! About the crashes, i developed this crackme under WinXP SP1 and no crashes occurred during the execution or while debugging. I'm sorry for that, mate! :(
haggar 24. May 2005	Hmm, but why sending two identical files :-0? But crackme was nice. Little confused me serial number algo, I thought that I had to brute it, but while eating my dinner idea/solution fall on my mind ;-)
code_inside 25. May 2005	Hmm, very strange why it's crashing here... I will look more closely at it to find out why it crashes :)
code_inside 25. May 2005	Yes, just like I thought. It crashes on my system (In both CrackMe's window cases) because the EBX register isn't restored... But why does this happen on my system only? :D
TQN 25. May 2005	Hi Phoenix ! I found 3 EA. Text moving direction, transparent (region) window, and ball fall loop forever. Is it correct ?
Phoenix87 Author 26. May 2005	yeah. that's right
Phoenix87 Author 31. May 2005	Well, haggar's solution in quite good, but i'd like to mention that the exe files are identical in the algo, but different in one point. You have to find that point and understand what it is. In addition, there's a third easter egg which nobody described how to find it... P.S.: some functions may seem meaningless, but they have a proper feature. I thank you all if you can also describe their meaning.
TQN 05. Jun 2005	The third easter egg is: Help menu - About - About Dialog showed - type via keyboard: phoe

phox's crackmes

Download phox_crackmes.zip, 12 kb (password: crackmes.de)
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crackmes collection

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 14. Mar, 2002
Downloads: 3695

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by detten, published 14. mar, 2002; download (9 kb), password: crackmes.de or browse.

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Solution by sushi, published 14. mar, 2002; download (4 kb), password: crackmes.de or browse.

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Solution by Zero, published 14. mar, 2002; download (1 kb), password: crackmes.de or browse.

Zero has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

erichnagy 25. Sep 2014	hi. im realy stuck with crackme_6. how i reverse the add ror routine? i tried like the crackme 5 solution but i have no results. i will feel really happy with some tips. thanx

phyre's Crackme #1 by phyre

Download crackme_phyre.zip, 4 kb (password: crackmes.de)
Browse contents of crackme_phyre.zip

Hi!

This is my first crackme ever, and I think it's not too easy.
It has some homemade crypto/hashing stuff and a few other small surprises. :-)

A working keygen would be very nice. (selfkeygen shouln't be possible)
Crackme was tested on Win2k & WinXP, 9x is not supported.

Have Fun...

contact: phewled[0x40]gmail.com

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 13. Mar, 2006
Downloads: 212

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to PiCkLeD »

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Discussion and comments

astigmata 13. Mar 2006	what's the problem with this target ? I can't see it in my process list I can't attach in olly If I load in olly, it's terminated :P
Ox87k 13. Mar 2006	terminated but.. have u a msgbox that tell u "something went wrong"? there are some check anti-debug ;)
deroko 13. Mar 2006	what a nice crackme, really kewl crackme...
phyre Author 13. Mar 2006	thx deroko. did you solve it and are you going to write a solution?
deroko 14. Mar 2006	well still working on serial algo, found that kewl trick to generate always false serial if crackme isn't run from "certain" location, found relations between hashing procs but still it will take a while to find right key.
kao 14. Mar 2006	really nice crackme! :)
Vermin 15. Mar 2006	This crackme is really fun! So far I was able to run it unpacked (a little header-patching was required), but still not within a debugger (at least not in Olly). I reversed your crypting-algo and coded a little prog that crypts and decrypts strings. But thats all useless if i canÂ´t make my way to the serialalgo. Is it possible to attach with SI? If so, IÂ´d consider installing it.
klks 17. Mar 2006	you dont need SI, olly will do. i got all the thing unpacked and patched, runs nicely under olly but all my serials are correct :D. very nice
znycuk 27. Mar 2006	Hi all, Is someone still working on a solution to solve this one ? I think i don't have the level required yet, but i'll be really interrested in a working solution to follow :) I have unpacked it, and i'm able to lauch it in olly, only if i manually change a value, to decrypt correctly library names. Next, i've found is that it executes himself in my olly memory space by invoking CreateRemoteThread. And here i'm stuck... Does someone could give me a little hint, or some good reading, to continue my analysis ? thx
TQN 27. Mar 2006	Do not debug it with OllyDbg, run it from explorer.exe, use OllyDbg to attach to explorer.exe, break on new thread.
znycuk 27. Mar 2006	thanx for the hint TQN. But first, i have to find a way to patch correctly the header (or unpack correctly) my unpacked crackme. coz' at the moment i'm just able to launch it in olly (unpacked of course) by changing the value of ESI just before the first decryption of lib. names.
phyre Author 20. Apr 2006	where are the solutions? :) hint: it always creates a remote-thread in the parent process, the parent-process must be "explorer.exe", otherwise it calculates random crap.
Vermin 22. Apr 2006	aaaarrrrgh, I guess this is the point I missed. I turned the crackme into a "standalone"-program, so no explorer.exe needed anymore. I was not smart enough to see, the crackme needs explorer.exe to calculate right. Thanks for the hint. I will start again with this beautiful crackme.

PiCkLeD's crackme0x1

Download crackme0x1.zip, 5 kb (password: crackmes.de)
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Program: Crackme0x1.exe
Created by: Pickled
Operating System: DOS
Language: C/C++, MS VS 2005
Date: 08/10/2006

Level: Beginner

Notes:

This is my first crackme, was good fun making it.

I hope it's not too hard for you ;)

No bypassing, I wan't to see a valid solution please!

Good Luck and thank you for trying!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 09. Oct, 2006
Downloads: 1665

Rating

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Solutions

Solution by polizei, published 02. mar, 2007; download (2 kb), password: crackmes.de or browse.

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Solution by pwn, published 01. feb, 2007; download (1 kb), password: crackmes.de or browse.

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Solution by ghostz, published 15. oct, 2006; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

geeko 09. Oct 2006	DOS? huh? MSVCP80.DLL not found huh?
ghostz 09. Oct 2006	Working perfectly under Windows XP Sp2 Solved :) Nice Password !! Thanks ;) @+
BaKaE 09. Oct 2006	now write your second solution ghostz i think you become better every day (keep working dude)
ghostz 09. Oct 2006	Ok! Thank you ! BakaE ;) I try to write solution !
jB_ 09. Oct 2006	geeko : install the latest .NET framework to run it. If you have this problem, I guess the crackme has been compiled with MSVC 2005 and linked with the VC runtime DLL.
ghostz 10. Oct 2006	Yes ! I have .NET framework installed.
geeko 10. Oct 2006	I wont install anything just for this crackme. He said: Platform: DOS He didn't mention we need XPsp2 and .NET thanks
PiCkLeD Author 10. Oct 2006	Thanks for pointing that out jB! Geeko: jB is trying to be helpful, no need to be a prick about it. Nobody is perfect and nobody is forcing you to do anything.
DeepBlue 10. Oct 2006	geeko just wanted to be precise, because your description of your Crackme is just plain wrong. Change: Platform: DOS Into: Platform: Windows And everybody is happy. :)
geeko 11. Oct 2006	Thanks, Deep. and add olso: u need .NET

Pimp.exe's AsmKeyMe #1

Download KeyMeAsm1_FINAL.zip, 1 kb (password: crackmes.de)
Browse contents of KeyMeAsm1_FINAL.zip

This is a pretty easy KeyMe. Beginner-Intermediate range. The algo isnt very big at all but there are a few tricks.

The goal of this KeyMe is for those who are pretty new to RE. It gives you a few curve balls that make it tougher. Don't worry though, the code is in assembly and is quite easy to read. Pay attention to the API's that are called. As well as the strings available to you.

There is no encryption, packer, or protectors used. It's a whole 4kb so you dont have much to sort through.

I hope you enjoy the keyme.

Rules & Terms:
Do not patch, bruteforce, or self-keygen. Make a keygen and post a tutorial.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 27. Nov, 2007
Downloads: 964

Rating

Votes: 3
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Solutions

Solution by ReWrit, published 17. jul, 2008; download (1202 kb), password: crackmes.de or browse.

ReWrit has rated this crackme as quite nice.

Solution by TiGa, published 30. nov, 2007; download (2394 kb), password: crackmes.de or browse.

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Solution by boonz, published 30. nov, 2007; download (90 kb), password: crackmes.de or browse.

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Solution by IMPosTOR, published 30. nov, 2007; download (784 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

IMPosTOR 27. Nov 2007	i keygen it try to make video tutorial :D
TiGa 27. Nov 2007	That's 2 video solutions in! Will we have 3?
Pimp.exe Author 29. Nov 2007	Awesome IMPosTOR! :) Looking forward to seeing it.
deskyet 09. Feb 2008	I can't take it thatIMPosTOR did this one, so I just going to focus on this one..

pinku's Keygen Me v1.4

Download Keygen_Me_v1.4.zip, 10 kb (password: crackmes.de)
Browse contents of Keygen_Me_v1.4.zip

This keygen me has a polymorphic nature.
There are several loops that searches for the valid serial & thn check it with the user given serial.
There are some restricyions aswell which are as follows -:
1> Use of Reflectors is Prohibited.
2> Only OllyDBG or SoftIce or DASM is allowed to be used.
3> The solution must be a keygen + algorithm.
4> The source code of the Keygen me is not to be tampered inorder to get a valid key.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 06. Apr, 2009
Downloads: 304

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Discussion and comments

indomit 06. Apr 2009	I think it's not good idea to prohibit using of reflector. Anyway anyone will use it. Better to write crackme in c++ or other not .net language, if you do not want show your code. Or you can use obfuscation or/and crypto.
T.0.R.N.A.D.0. 06. Apr 2009	Are we supposed to patch the nag ? ;) [[ It's annoying. ]] Hehe..
T.0.R.N.A.D.0. 06. Apr 2009	Is something wrong ?? Olly 1.10 shows CLR Error and crashes !! Olly 2.0b creates 8 threads (takes long time) and then exits !! The exe uses ~22 MB RAM !!!!!!
kao 06. Apr 2009	Indomit: +1. Maybe it is possible to fix a clock using only a sledgehammer but I'd rather use screwdriver and magnifying glass. T.0.R.N.A.D.0.: "Born 2 C0DE" does not mean "Born to reverse".. :) It works perfectly under Olly 1.10 and .NET 2.0. Try to use Olly without any patches and plugins.
T.0.R.N.A.D.0. 06. Apr 2009	I AM USING OLLY 1.10 and 2.0b WITHOUT ANY PATCHES & PLUGINS. But, I repeat, I cannot open it in Olly. I could disassemble it in W32DASM though. OFF-TOPIC :: Of course Born 2 C0DE does not mean Born 2 Reverse. I NEVER CLAIMED THAT. Please comment ONLY on the concerned KeygenMes.
iLL_LeaT 07. Apr 2009	well, you need a debugger that decompiles to CIL. Seems silly to me to keep users from using reflector. it's a great tool for revercing .net. in fact, i wouldn't even try. try searching for info about managed .net and CLI
iLL_LeaT 07. Apr 2009	*search for CIL, not CLI
pinku Author 07. Apr 2009	reflectors are gr8 for reversing the net crackmes. but had i created it in C++ u wudn't have used a relector!. Keygenning is task that requires brain & skill. But reflectors makes it a mechanical task. So , plz I wud like ppl o acknowledge the rules & proceed complying with it.
pinku Author 07. Apr 2009	What you ppl are suposed to do is find the nad serial & name & see which it gets compared to & calculate the right serial . 1ce u know the right serial & name u can easily cr8 a keygen. Use of W32DASM is allowed.. Plz proceed T.O.R.N.A.D.O
iLL_LeaT 07. Apr 2009	Okay, so you used VC++, then it used the C++/CLI compiler which still compiles to CIL. It is still managed code. People still need deal with a JIT. OllyDBG and W32DASM is made for debugging 32bit assembly (Microsoft may call their IL “assembly,” but it is not). You might as well tell them they can only use notepad. And I thought SoftIce was a dead project. You can't hand someone some broken electronics and tell them to only fix it using only a shovel. I don't make since.
iLL_LeaT 07. Apr 2009	"Keygenning is task that requires brain & skill" I agree. I don't like using Reflector. However, it is the correct tool to use here. Next time use MFC. Or standard C/C++ or some other language that compiles to unmanaged code. Sorry, but I don't think anyone is going to try to figure out what parts of the executing program is the JIT compiling to machine code and what parts are the machine code that was previously compiled by the JIT. Just lift the rules, let someone solve it. Then next time. Make a bad ass crackme that is unmanaged.
pinku Author 08. Apr 2009	Ok.. When every body wants to use a reflector. the use it. But the soutce code must not be tampered with to get a valid serial. The serial should be for the original keygen me..No patching is allowed.

pinku's Keygen Me v1.5

Download Keygen_Me_v1.5_By_Pinku.zip, 10 kb (password: crackmes.de)
Browse contents of Keygen_Me_v1.5_By_Pinku.zip

This Keygen Me is for those who has already solved v1.3 & v1.4.
This keygen has a special algo that allows it to generate special keys.
This keygen has a speciality that it has two modes ie ---> i) Serial Only.
ii) Name & Serial Protection.

Therefore this keygen must be solv'd twice for it has two protection algorithms.

Rules...To be followed---->1> Use of Reflectors is Prohibited.
2> Only OllyDBG or SoftIce or DASM is allowed to be used.
3> The solution must be a keygen + algorithm.
4> The source code of the Keygen me is not to be tampered inorder to get a valid key.
5> The keygen can be written in any language.

No packers are used here.

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 07. Apr, 2009
Downloads: 282

Rating

Votes: 5
Crackme is boring crap.

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Solutions

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Discussion and comments

ReDucTor 10. Apr 2009	Is it just me or are the rules on this one a bit stupid?
pinku Author 10. Apr 2009	Are ypu talking about the rule of not using the reflector. Well , It seems that no 1 can crack this apart without reflector. The use reflector. But yes tampering the source-code inorder to get the valid serial is not allowed. You need to get a key for the original source code. I think that i am clear & any stupidity wont be tolerated..
Filler 06. Jun 2009	I think if you say "Use of Reflectors is Prohibited." every one here will use it. In a real example, no cracker will not use Reflector to crack a .NET application. The ohter rules are still ok.
Filler 06. Jun 2009	Boring and unrealistic crap. sorry. No serial has a lenght of 2147483647... And I found a bug: CrackMe is not fully unloaded on the ExitButton. If you want to avoid to use Reflector: obfuscate it or make a "nativ wall" around your assembly...
Koskha 06. Jan 2014	Is a stupid fake. Maxlength of textbox is minor to requested length. The only way would be try to bruteforce e.GetHashCode, but then the goodboy string will be replaced by the other check.

pinku's Pinku'S Keygen_ME v1.3

Download Keygen_Me_v1.3.zip, 9 kb (password: crackmes.de)
Browse contents of Keygen_Me_v1.3.zip

This crack_me has been created by me using VB.net.
Its designed by keeping in mind that ppl who are learning to crack(like me) gets their hands little dirty with this.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 02. Apr, 2009
Downloads: 770

Rating

Votes: 3
Crackme is boring crap.

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Solutions

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Discussion and comments

T.0.R.N.A.D.0. 02. Apr 2009	@ Author No Read-me !?! No Rules !?!
pinku Author 03. Apr 2009	i am just a newbie to this. The Rules are.--> Reflectors are not to be used. --> The source code shouldnot be tampered inorder to get a valid serial. --> A keygen must be the solution. --> No cracked .exe will be accepted.
pinku Author 03. Apr 2009	Any1 been able to get through this??? plz post a soln.. A keygen & a detailed tut..
TwoLate 16. Sep 2009	I am also just a newbe. It looks like the serial should be "true" Right before the app should show the text "registered", it converts the textbox.container to a string, and then converts the text to a boolean. Should not this software test the contents of the textbox container, and not the container itself? Maybe i am off the track, as I do not understand the output from ildasm wery well...
s0l_ir0n 15. Dec 2009	crazy keygenme with randomizer
ahmad68 10. Jul 2010	I have no reason why someone should not use Reflectors ??
Skripter5000 30. Jul 2012	It doesn´t go because the Me.TextBox1.Container is Nothing !
givses 25. Jul 2013	How could we match a lenght of the serial number of a random lenght? VBMath.Rnd * 20.0! Lol....
Cubinator 07. Aug 2014	Maybe it's a new style of serial validation, but I think my understanding of MSIL is well enough to see that this... ldarg.0 callvirt instance class TextBox .this::get_TextBox1() callvirt instance class IContainer Component::get_Container() callvirt instance string object::ToString() call bool Conversions::ToBoolean(string) brfalse.s IL_01d6 ... is no proper way of checking a TextBox's text.
Cubinator 07. Aug 2014	Are we allowed to crack this application instead of making a keygen?

_piro_'s vb crackme #1

Download piro_vb1.zip, 6 kb (password: crackmes.de)
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nag, hardcoded serial (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 01. May, 2000
Downloads: 1713

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Solutions

Solution by vorrtexx, published 01. may, 2000; download (3 kb), password: crackmes.de or browse.

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_piro_'s vb crackme #2

Download piro_vb2.zip, 6 kb (password: crackmes.de)
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name/serial (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 01. May, 2000
Downloads: 1877

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Solutions

Solution by webmasta, published 01. may, 2000; download (30 kb), password: crackmes.de or browse.

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Solution by laokoon, published 01. may, 2000; download (21 kb), password: crackmes.de or browse.

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pitr's Crackme 1.6

Download crackme.1.6.zip, 4 kb (password: crackmes.de)
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Solutions

Solution by TaGaDaPaF!, published 11. aug, 2004; download (24 kb), password: crackmes.de or browse.

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Plasmator's Evolution

Download evolution.zip, 2 kb (password: crackmes.de)
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KeyGenMe

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 06. Jun, 2004
Downloads: 1342

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Solutions

Solution by _HellDashX_, published 27. feb, 2005; download (4 kb), password: crackmes.de or browse.

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Solution by therapy, published 24. jun, 2004; download (5 kb), password: crackmes.de or browse.

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Plasmator's Genesis

Download genesis.zip, 2 kb (password: crackmes.de)
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Password Key , Password Generator

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Jun, 2004
Downloads: 1459

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Solutions

Solution by code_inside, published 03. jun, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by ZeroZero, published 03. jun, 2004; download (5 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 02. jun, 2004; download (50 kb), password: crackmes.de or browse.

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Plasmator's Sphynx

Download sphynx.zip, 3 kb (password: crackmes.de)
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Counting Lesson , Warning , Beware

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 10. Jul, 2004
Downloads: 1525

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Solutions

Solution by Plasmator, published 20. jul, 2004; download (9 kb), password: crackmes.de or browse.

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Solution by elfz, published 13. jul, 2004; download (44 kb), password: crackmes.de or browse.

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pnluck's Android SignMe

Download SignMe.zip, 73 kb (password: crackmes.de)
Browse contents of SignMe.zip

SignMe is an Android crackme: you must unlock di screen finding the right movements to do

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Java

Published: 30. Jul, 2013
Downloads: 266

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Discussion and comments

c0otlass 06. Apr 2014	it can be cracked ... i fine the signature code... "dd9bb96ed47c8758e00a5f5687adb09f3411444706c7ddbb69699647c2a1cac1" but i do not know how finde it's picture!!!

pnluck's Crackme x64

Download Crackme94.zip, 25 kb (password: crackmes.de)
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This is a simple crackme for win64. You must find the correct serial, patch is not allowed

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 05. Jul, 2008
Downloads: 493

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Solutions

Solution by Ox87k, published 11. jul, 2008; download (3587 kb), password: crackmes.de or browse.

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Solution by TiGa, published 11. jul, 2008; download (2277 kb), password: crackmes.de or browse.

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Discussion and comments

TiGa 05. Jul 2008	Solved! Really nice and simple crackme! It's a good one to try x64 for the first time.
Ox87k 05. Jul 2008	Hum.. TiGa, can you make a video tutorial? I would learn something more about x64
TiGa 05. Jul 2008	Sure, I'm waiting 2-3 days to give a chance to somebody else .
Ox87k 06. Jul 2008	TiGa.. but have you some problem with IDA or nothing? I've problems with breakpoints.. :-\|
TiGa 06. Jul 2008	I used IDA 5.3 BETA instead of 5.2. ;)
pnluck Author 06. Jul 2008	I reversed it with WinDBG & IDA 4.9 :p (watching the source code hihihi)
Ox87k 07. Jul 2008	Solved! Tiga, i'll do a video-tutorial if you didn't make it already. Is it ok for you?
TiGa 09. Jul 2008	Send yours in whenever it's ready.
MACH4 11. Jul 2008	Tnks, two excellent tutes guy's! Couple of questions; Why didn't the program detect winDebug? @Tiga, The power of IDA never fails to amaze me when used in the right hands, yet using it seems more criptic than the program being debugged! How do you rate winDebug with IDA? ie advantages disadvantages? sorry for being slightly off topic!
pnluck Author 11. Jul 2008	@MACH4: "Why didn't the program detect winDebug?" I didn't write code to detect ida or another one debugger, ida craches when try to debug this crackme, just because can't read, maybe, in the right way, exe files generated by visual studio 8.
TiGa 11. Jul 2008	The anti-debug trick prevents WinDbg from starting the file directly too, that's why 0x87k attached to the process after the anti-debug was executed. If the trick had also been present in the code of the button too, attaching would have been useless. In mine, I took the long way around to explore and neutralize the anti-debug trick. I could have attached IDA in the same way as WinDbg to bypass it instead. IDA 5.2 crashing is not really caused by any anti-debug trick, it's simply an unrelated bug in IDA. The bug was fixed in 5.3. I prefer IDA because of the graphical view. WinDbg is a ring 0 debugger but I don't really need that feature and the interface is command-line only. I don't use OllyDbg either, always IDA.
MACH4 12. Jul 2008	Thanks for the explanations , Much appreciated!

pof_es's pof kgme 0x01

Download pof-kgme-0x01.zip, 2 kb (password: crackmes.de)
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[ ===== pof KGME 0x01 ===== ]

The main goal is to find a valid password, but there's more than one valid password, so a keygen would be nice...

You can use whatever tool you like, but better if you use only GPL or open source tools, I recommend using radare (http://radare.nopcode.org).

This crackme is written in C with very little inline asm, it is "packed" but it's very easy to unpack ;)

The only rule is that patching is prohibited.

Enjoy :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 17. Jan, 2008
Downloads: 429

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Yoha, published 14. feb, 2013; download (7 kb), password: crackmes.de or browse.

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Solution by lagalopex, published 26. jan, 2008; download (2 kb), password: crackmes.de or browse.

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Potk4n's CrackMe_Potk4n

Download crackme.zip, 202 kb (password: crackmes.de)
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******************************************************* Find valid serial to your Name
* No patching
* Write tutorial
* Make keygen (if you want,(no conditions))
*Enjoy !
******************************************************

Sorry for my bad English :(

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 17. Apr, 2008
Downloads: 890

Rating

Votes: 3
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Solutions

Solution by MACH4, published 25. apr, 2008; download (1064 kb), password: crackmes.de or browse.

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Discussion and comments

BiNg1@ 17. Apr 2008	Can we input name? or only password?
DigitalAcid 17. Apr 2008	If you see what the serial is, the name doesn't really matter ;).
Potk4n Author 17. Apr 2008	1 computer = 1 user = 1 password :)
Potk4n Author 28. Apr 2008	to MACH4: Nice video, THX ;-)
MACH4 28. Apr 2008	No Prob! look forward to the next one! MACH4
Serialcracker 09. Oct 2008	A very easy CrackMe. I made a KeyGen

Potk4n's Football CrackMe

Download Football.zip, 427 kb (password: crackmes.de)
Browse contents of Football.zip

No patching
No browse and search on Internet
Find correct name of players

Write tutorial

Enjoy !

Solution KEY is first char of first name of all players !!!

Sorry for my bad English :(

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 29. Mar, 2008
Downloads: 626

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Solutions

Solution by ultrain, published 04. apr, 2008; download (253 kb), password: crackmes.de or browse.

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Solution by mysak, published 04. apr, 2008; download (105 kb), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 29. Mar 2008	There is a bug. When it checks if the name is right, the names are not 100% the same. Maybe Olly can't handle the special characters or so. It's still solvable though.
mysak 30. Mar 2008	Good idea !!! :-)) Easy and good. Thank you.
ksnrcp 31. Mar 2008	i edited special alphabet to "?" for fix bug now i win it :) but with solution.zip i dont know what alphabet will is first and dont know where to begin : )
r-Evolution 20. Sep 2010	The window is bigger than my screen :P

Potk4n's MultiLevel CMe

Download Multi_CMe.zip, 211 kb (password: crackmes.de)
Browse contents of Multi_CMe.zip

If you pass over three levels then solve my crackme.
No patch, write tutor.

Enjoy !

sorry for my bad English :-(

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 02. Mar, 2009
Downloads: 517

Rating

Votes: 3
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Solutions

Solution by gemigis, published 05. mar, 2009; download (15 kb), password: crackmes.de or browse.

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Solution by indomit, published 03. mar, 2009; download (36 kb), password: crackmes.de or browse.

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poxyran's TRVCrackme v1.0

Download TRVCrackme-1.0.zip, 3 kb (password: crackmes.de)
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-- TRVCrackme v1.0

This is a little experiment so something can go wrong. If you find any bug e-mail me :)

You must achieve the following tasks:

1) Understand how the crackme works.
2) Get a valid serial.
3) Create a keygen.
4) Write a tutorial explaining how you solved it.

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: C/C++

Published: 13. Sep, 2013
Downloads: 407

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Solutions

Solution by Miko, published 09. oct, 2013; download (2 kb), password: crackmes.de or browse.

Miko has rated this crackme as quite nice.

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Discussion and comments

victordmelo 13. Sep 2013	hmmm Elf extension. It's needs Linux Debian.
lykaner 18. Sep 2013	Not only it's a elf but also it's compiled for MIPS I...
poxyran Author 21. Sep 2013	so? ... what would be the problem with an elf binary compiled for MIPS?.
Delirium 26. Sep 2013	No problem. Can see it as bright as day.
andrewl.us Moderator 09. Oct 2013	cool to see a solution for a different architecture!
EdwardBlack 18. Oct 2013	I cant find the executable ?!

pr2007's CrackMe #1 by PR2007

Download CrackMe.zip, 61 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Just patch this crackme or search for the algorithm that is used for generating the serial.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 10. Nov, 2008
Downloads: 1035

Rating

Votes: 3
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Solutions

Solution by _HellDashX_, published 16. nov, 2008; download (7 kb), password: crackmes.de or browse.

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Solution by yudi, published 16. nov, 2008; download (145 kb), password: crackmes.de or browse.

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Discussion and comments

TFB 10. Nov 2008	0020F658 00931E50 ASCII "damn... almost there, aren't you ?" :(
Zaphod 11. Nov 2008	Damn...how did you manage to crack me? ;)
pr2007 Author 11. Nov 2008	@Zaphod: indeed, that message should appear when you've 'cracked' it. :p
yudi 11. Nov 2008	Your solution to this crackme is being reviewed by moderators ! see you soon pr2007 !!!
pr2007 Author 11. Nov 2008	@Yudi: nice to see you've solved it. I'm looking forward to see your tutorial. :)
itsho 12. Nov 2008	it's got to be some kind of PGP. and your name is peter :-)
pr2007 Author 12. Nov 2008	@itsho: my phone number is also in the source... give me a call :p (j/k)
Z!PPer 15. Nov 2008	'Damn... how did you manage to crack me !' he's good message :D
pr2007 Author 16. Nov 2008	Almost 300 downloads... nice. :)

praetorian's crackme

Download praetoriancm.zip, 1 kb (password: crackmes.de)
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keyfile

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Jun, 2001
Downloads: 1682

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Solutions

Solution by [xorolc], published 21. jun, 2001; download (1 kb), password: crackmes.de or browse.

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Solution by fatality, published 21. jun, 2001; download (1 kb), password: crackmes.de or browse.

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Solution by bl00dbath, published 21. jun, 2001; download (4 kb), password: crackmes.de or browse.

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prasid's PASSWORD PROTECT

Download CRACK_ME!!.zip, 6 kb (password: crackmes.de)
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Try to resolve the password...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 27. Jul, 2008
Downloads: 910

Rating

Votes: 6
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Solutions

Solution by br0ken, published 30. jul, 2008; download (1592 kb), password: crackmes.de or browse.

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Solution by Xspider, published 29. jul, 2008; download (242 kb), password: crackmes.de or browse.

Xspider has rated this crackme as boring.

Solution by costy, published 29. jul, 2008; download (745 b), password: crackmes.de or browse.

costy has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

obnoxious 27. Jul 2008	toooooo easy!!!!
costy 27. Jul 2008	i think it's a level 1.
LCfer 27. Jul 2008	i agree! :( vbastrcmp rulez ;)
prasid Author 27. Jul 2008	You are all genius.I respect you all.I can give superior protection but I can not break.Please give a tutorial how to break..............??
Xspider 27. Jul 2008	maybe i will try to do an ultimate solution :p wait for me :D
WinFan 27. Jul 2008	This is really too easy for Level 2, should really be Level 1! But it's good for beginners!
costy 28. Jul 2008	@prasid Just be patient solutions must be approved first!
obnoxious 28. Jul 2008	he he solutions will pour in soon @xspider go ahead n makes us proud by writing the ultimate solution
Xspider 28. Jul 2008	ok i just sumbitted my solution :D we will see if it is ultimate :p hope to make u proud :)
pidreq 29. Jul 2008	waiting for solution... btw this crackme is quite simple
obnoxious 30. Jul 2008	@Xspider good1 :) it was as close to the ultimate solution as it could get :P
prasid Author 30. Jul 2008	thank u @ genious.
EfTwelve 12. Aug 2008	Great Tutorial Xspider! SmartCheck sure would have saved me some time. Thanks!

Predator's Bastard1

Download CrackmeBastard1.zip, 19 kb (password: crackmes.de)
Browse contents of CrackmeBastard1.zip

Try this crackme, Bastard1 is make in VB but it have a protection. Nothing of commercial ok ^_^
You must find a right serial for your nick, the algorithm is really stupid, the real difficulty is before.
Greetings to all groups and cracker who work hard to keep the Scene alive.
Predator

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 13. Jul, 2006
Downloads: 715

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by EvOlUtIoN, published 15. jul, 2006; download (156 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 14. Jul 2006	Solution sended... I think it is very very simple, the level 6 is too much, for me the maximum is 2 also bcause the protection is very easy to break
Predator Author 17. Jul 2006	Yes level 6 was an error ^_^ very good tutorial ;-) thx EvOlUtIoN

Predator's Pirupiru

Download Pirupiru-crackme.zip, 17 kb (password: crackmes.de)
Browse contents of Pirupiru-crackme.zip

I think this is the first crackme write in visual basic that use this protection technique :-)

Targert:

-unpack
-kill nagscreen

My special thanks fly to Evolution, Ox87k, bLaCk-eye and all who keep the Scene alive.

Predator

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 25. Mar, 2007
Downloads: 495

Rating

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(we have only 2).

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Solutions

Solution by simpleuser, published 18. oct, 2007; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

xylitol 16. Oct 2007	manual unpacking ?
DigitalAcid 17. Oct 2007	Most likely yes. The author made his own packer, it seems :). I tried dumping it with procdump, wich surprisingly worked (after I saw some stuff inside the crackme), but the file doesn't run.
EvOlUtIoN 19. Oct 2007	OMG, this crackme is very simple to dump! Just look at the Memory area written on second file and dump partially with lordpe...it runs for sure no modifies are needed!

Pride's CrackC++ by Pride

Download CrackMe#1_by_Pride.zip, 127 kb (password: crackmes.de)
Browse contents of CrackMe#1_by_Pride.zip

This is my first CrackMe written in C++

Rules:
*No patching
*Make a KeyGen
*Upload a solution + tutorial

I hope it's not too easy.
Have fun.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 13. Jun, 2009
Downloads: 1110

Rating

Votes: 7
Crackme is quite bad.

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Solutions

Solution by yudi, published 15. jun, 2009; download (240 kb), password: crackmes.de or browse.

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Solution by skynetuniverse, published 15. jun, 2009; download (3 kb), password: crackmes.de or browse.

skynetuniverse has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

skynetuniverse 13. Jun 2009	Ok, solved it!! Thanks Pride, was very easy!! My solution would be available when moderator have reviewed it!! skynetuniverse
Ganoes Paran 13. Jun 2009	yea solved it. easy encryption, only two lines =)

Pride's CrackMe#2 by Pride

Download CrackMe#2_by_Pride.zip, 127 kb (password: crackmes.de)
Browse contents of CrackMe#2_by_Pride.zip

This is my second CrackMe written in C++
I made it a bit harder, so its not as easy as the first one.
I also took more time for that, as for the first one.

Rules:
*No patching
*Make a KeyGen
*Upload a solution + tutorial

Hint:
*Serial's are only numbers.

Happy Cracking.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 28. Jun, 2009
Downloads: 1317

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by Dicrypt, published 31. aug, 2009; download (590 kb), password: crackmes.de or browse.

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Solution by KernelJ, published 23. jun, 2009; download (132 kb), password: crackmes.de or browse.

KernelJ has rated this crackme as boring.

The submission of solutions is closed.

Discussion and comments

Ganoes Paran 16. Jun 2009	found some errors on my side me thinks if serial is > 10 chars, it skips master serial and says you put in the bad serial and bad master serial and if you put in the correct serial, it skips master serial and says you put in the bad serial and bad master serial here's what i have for me: user : ganoes serial : 3119803239 (B9F46B67h) master : 3120785392 (BA0367F0h) serial and master are both correct, but if you enter it in the program, it "drops" through a hole and gives you a bad boy when it's suppose to drop to the good boy want to check it? open program in oll, go right before the CMP EAX, dword ptr ss:[ebp+38 (something like that) and change it to the corresponding serial (aka, Mov Eax,B9F46B67 - for the serial part) as you step through the program it'll act fine, no problem at all giving you good boy message but if you run the program normally and put it in via console window, it kinda "crashes" the program, making it skip master serial and give bad boy bad bad bug =P using windows xp over here
Pride Author 17. Jun 2009	ok i checked it and it rly does this bug =(, i'll try to fix it, and upload a new version as soon as i removed the bug. Thx for reporting this bug.
Pride Author 17. Jun 2009	It's difficultier than i thought. It may take a while till i get round this.
Ganoes Paran 17. Jun 2009	my suggestion is to rebuild it from scratch if it does not work for you when you tried to fix it..
morsub4u 17. Jun 2009	I wondered about this. This seemed to be written very strange.
Pride Author 19. Jun 2009	Ok this is the Updated Version now.
Ganoes Paran 20. Jun 2009	nope still broken. user: pride pass: 3119803208 it should work but instead of putting EAX to "3119803208d" and comparing it to the computed serial (which would be "3119803208d") it instead puts FFFFFFFFFFFF as EAX and compares it to "3119803208d" and then it says serial is wrong and skips master serial again lol... I'm serious that this thing is a bit too buggy i mean look at line 004014CD. it compares EAX (user input serial) to the calculated serial calculated serial for pride = B9F46B48 (3119803208d) and when you entered 3119803208d as your serial, instead of having B9F46B48 as EAX to compare to the calculated serial (which is also B9F46B48 ), you get FFFFFFFFF which messes up the program... maybe its the worng serial i dunno, but still...
KernelJ 21. Jun 2009	It's not broken, you have the wrong serial. Think how B9F46B48 would normally be interpreted in HLLs! It's nothing complicated, you'll get it I'm sure.
Pride Author 02. Jul 2009	ok it works now.
djoko 01. Aug 2009	good job. this is me first time to crack
Reforce 01. Aug 2009	hehe ! nice crackme who is Lord Blix?
Dicrypt 31. Aug 2009	Submitted a detailed solution. :D

profdracula's Cryptok KeyfileMe {4}

Download Cryptok_KeyfileMe_.zip, 4 kb (password: crackmes.de)
Browse contents of Cryptok_KeyfileMe_.zip

Prof. DrAcULA presents, Cryptok KeyfileMe {4}
==============================

It is the 4th crackme in the Cryptok-series.
Hope you enjoy this!

You have to:
1. Code a keyfile-maker(inline-keygen is not allowed).

Solution for this KeyfileMe means;
1. Tutorial explaining how it works.
2. No patching, no self-keygenning.
3. A working keyfile-maker, with source.

Protection Level : For you to rate it

See u with next Cryptok Relaese.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 13. Feb, 2007
Downloads: 1851

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by Guetta, published 23. feb, 2007; download (110 kb), password: crackmes.de or browse.

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Discussion and comments

happytown 14. Feb 2007	Anti debug inside?
P0wah 14. Feb 2007	Is it ok to just show how to patch the anti debug in the solution?
Guetta 16. Feb 2007	Ok, easy one, funny CRC part, I'm gonna make a keyfilegen ; ) Thanks profdracula !
Crosys 16. Feb 2007	yeah really easy one, i will write solution if noone else do
halsten 19. Feb 2007	An interesting crackme, liked it. Keep up the good work! :]
hound 23. Feb 2007	Cool crackme! First one of the series I actually solved by myself :):):).

profdracula's Cryptok KeygenMe {1}

Download Cryptok_KeygenMe_.zip, 11 kb (password: crackmes.de)
Browse contents of Cryptok_KeygenMe_.zip

Prof. DrAcULA presents, Cryptok KeygenMe 1
==========================================

It is the first KeygenMe in the Cryptok-series.
Hope you enjoy this!

Solution for this KeygenMe means;
1. Tutorial explaining how it works.
2. A working keygen with source(for a clean conscience plz don't rip code).

Protection Level : 2 (almost)

See u with next Cryptok Relaese.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 03. Jan, 2007
Downloads: 690

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by Guetta, published 04. jan, 2007; download (34 kb), password: crackmes.de or browse.

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Discussion and comments

profdracula Author 09. Jan 2007	Waiting for solutions :)

profdracula's Cryptok KeygenMe {2}

Download Cryptok2.zip, 12 kb (password: crackmes.de)
Browse contents of Cryptok2.zip

Prof. DrAcULA presents, Cryptok KeygenMe {2}
===============================

It is the 2nd KeygenMe in the Cryptok-series.
Hope you enjoy this!

You have to:
1. Code a keygen-loader(single executable that'll run my DLL).
2. On entering a valid-serial, Cryptok {2} displays a Googboy-dialogbox.
Your keygen-loader must be able to display given image(youdidit.bmp) in this dialog-box(without changing
code/resource of the DLL, of course. You have to code this feature in your leygen-loader).

Solution for this KeygenMe means;
1. Tutorial explaining how it works.
2. No patching, no self-keygenning.
3. A working keygen-loader with source.

Protection Level : For you to rate it

Hints: You have to be a Dan Brown fan?

See u with next Cryptok Relaese.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 24. Jan, 2007
Downloads: 461

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by dreak, published 31. jan, 2007; download (96 kb), password: crackmes.de or browse.

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Discussion and comments

profdracula Author 26. Jan 2007	Another BIGGGG clue: The wife of Christ! Was all small and lived without spaces :)
red477 26. Jan 2007	aha, nice crackme:)
profdracula Author 30. Jan 2007	dreak solved it!

profdracula's Cryptok KeygenMe {3}

Download Cryptok_KeygenMe_.zip, 35 kb (password: crackmes.de)
Browse contents of Cryptok_KeygenMe_.zip

Prof. DrAcULA presents, Cryptok KeygenMe {3}
===========================================

It is the 3rd KeygenMe in the Cryptok-series.
Hope you enjoy this!

You have to:
1. Code a keygen(inline-keygen is not allowed).
2. On entering a valid-serial, Cryptok {3} displays a Goodboy-messagebox, but its text is encrypted.
You must code a decoding-dll that can decrypt this junk-text to original-text.

Solution for this KeygenMe means;
1. Tutorial explaining how it works.
2. No patching, no self-keygenning.
3. A working keygen and a decoding-dll, with source.

Protection Level : For you to rate it

Hints: I think there are more than enough clues in KeygenMe.

See u with next Cryptok Relaese.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 04. Feb, 2007
Downloads: 492

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by red477, published 23. feb, 2007; download (36 kb), password: crackmes.de or browse.

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Discussion and comments

red477 05. Feb 2007	i am foolish enough to get the prize!:D but, can you pm me a hint on how to keygen it, do i have to brute force the md5? at last, I like your crackmes, they are nice;)
profdracula Author 05. Feb 2007	Hi red477, when I say : "You have to get foolish", it means you have to let yourself befooled by the KeygenMe(KNOWINGLY). Its a hint in itself :) And for keygenning, you don't have to bruteforce MD5, because there is nothing to bruteforce in it. Look somewhere else.
Ox87k 10. Feb 2007	i've some problem here: 004022DD \|. 81F9 70617274 CMP ECX,74726170 how can it be possible? Ecx points to ntdll.someaddress and it's > than 74XXXXXXh while the Crc16 returns only XXXXh value so the sum never could be equal. Really confused! Some hints?
red477 11. Feb 2007	@dreak, yes, i am killing by the serial checking routine, too. as you said, to generate a name from a serial is SO EASY, but to me it is nearly impossible to do it the other way... @Ox87k, bro, this time you have to be careful:) there is a little anti at the beginning, i dont think you overlooked that;)
profdracula Author 11. Feb 2007	hi dreak, Ox87k and red477, if you see that code is changing itself, then its definitely (little) SMC[self-modifying-code]. But whether to use SMC, it takes this decision on some valid reason. But whether its using SMC or not both are vital for the solution to keygenme. And dreak, plz use PM's for sharing solving-methods, instead of posting them here. I think sharing solving-ideas here kills the joy of solution a bit :)
Ox87k 11. Feb 2007	yes mates, sorry i didn't see this trick and thank you for your hint! lol btw, really hard this time!
red477 11. Feb 2007	i wrote a keygen and submitted it. but probably it is not the way you want;) it works, anyway, and i hope it will be accepted:D
Markus 24. Feb 2007	Great crackme. red477: How did you identify the BigNum library and its functions, did you name them manually? nice solution. thanks guys!
red477 24. Feb 2007	@Markus:yes,manually.

profdracula's Prof. DrAcULA's Keygenme#1

Download Prof._DrAcULA_keygenme#1.zip, 3 kb (password: crackmes.de)
Browse contents of Prof._DrAcULA_keygenme#1.zip

A keygenme inspired by Norton AV. Enter your name, generate a valid unlock-code and finally register using a valid-serial. Seems a little complicated but is not so :) I don't rate the difficulty-level but I think it is between 1-2. Enjoy!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 12. Sep, 2005
Downloads: 2546

Rating

Votes: 7
Crackme is nothing special.

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Solutions

Solution by Ox87k, published 13. sep, 2005; download (8 kb), password: crackmes.de or browse.

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Solution by NoRG, published 13. sep, 2005; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 13. Sep 2005	i would submit my special solution... buuuuuutt..... i don't know if this will be accepted.. i write a little tutorial and i modify ur keygenme in a keygen :)
kittmaster 04. Apr 2006	very nice...:)...........
afzalhusssain 03. Jun 2009	work fine thanks

profdracula's Prof. DrAcULA's OllyKiller Part 1 & 2

Download OllyKiller_1_and_2.zip, 34 kb (password: crackmes.de)
Browse contents of OllyKiller_1_and_2.zip

2 OllyKiller crackmes!
First part is very easy and second needs a little ........... luck?
Anyway, enjoy!!!

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: Assembler

Published: 19. Jan, 2006
Downloads: 1424

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by NexusC, published 23. jan, 2006; download (35 kb), password: crackmes.de or browse.

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Solution by KrasivayaSvo, published 22. jan, 2006; download (26 kb), password: crackmes.de or browse.

KrasivayaSvo has rated this crackme as nothing special.

Solution by Ank83, published 22. jan, 2006; download (34 kb), password: crackmes.de or browse.

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Discussion and comments

deroko 19. Jan 2006	it works in modified olly, I tought there is a new debug trick, regarding mbox in 2nd cme, well there are some other debuggers also (eg. softice, ida debugger etc..)
profdracula Author 19. Jan 2006	Yes deroko, the 2nd crackme captures Olly, but it uses nothing like OutputDebugStringA. Its very easy if u find the MAGIC-place. Anyway, i coded these OllyKillers for a guy learning reversing from me. So I thought these could be useful for other wannabes as well. If u like these OllyKillers, next time it could be something like "DebugKiller" that'll try to kill other tools as well :)
Ank83 19. Jan 2006	Some FAQ ? Patching is allowed ?! ollykiller.exe id the part one, and OllyKiller#1.exe is part two ? Is that right ? Is it a good patch if we patched the good or bad boy JUMP ? Regards Ank83
zairon Moderator 19. Jan 2006	I think the goal of the crackme it's pretty obvious, no need to add faq this time. Ank83, think about all the possible ways you have/know for avoiding the tricks :)
deroko 19. Jan 2006	@profdracula: I think that I've seen the same code for import and reloc handling =)

profdraculare's keygenme228

Download keygenme228.zip, 3 kb (password: crackmes.de)
Browse contents of keygenme228.zip

This is a basic keygenme in Linux. Enjoy!

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 23. Sep, 2015
Downloads: 409

Rating

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Solutions

Solution by aldeid, published 10. dec, 2015; download (185 kb), password: crackmes.de or browse.

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Solution by acruel, published 25. sep, 2015; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

aldeid 28. Nov 2015	@acruel: serials like "xxxx" are also accepted because it also enters the "monotonic increasing" branch: .text:080485AF test eax, eax .text:080485B1 jle short loc_80485C0 ; jump to 0x80485C0 if myserial[i]-my_serial[i+1] <= 0
acruel 28. Nov 2015	@aldeid Absolutely. I think serials like "xxxx" are also included in the set of serials generated by my keygen. Thanks. :)
aldeid 28. Nov 2015	My solution posted here: https://www.aldeid.com/wiki/Solution-profdraculare-keygenme228

promix17's ConsoleInfinity

Download Console_Infinity_by_Promix17.zip, 47 kb (password: crackmes.de)
Browse contents of Console_Infinity_by_Promix17.zip

Console Infinity 1.0
Written by Promix17

Level of dufficulty: 2~3

Simple rules: find the right password for this programm and register it :-)
If you find code, send me your solution. Can't do it??? Then you can buy the
registration code for only 19.99$! Hope that it will be interesting for you!

Send me your responses, comments and offers.

E-mail: promix17@yandex.ru

Note: Patches aren't allowed!!!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 03. Jan, 2011
Downloads: 482

Rating

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Solutions

Solution by Vallani, published 14. jan, 2011; download (200 kb), password: crackmes.de or browse.

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Discussion and comments

nardoman69 03. Jan 2011	I have alittle question..., it is packed??
draww 03. Jan 2011	indeed, but not a big problem. you can reach main routine easily.
simonzack Moderator 03. Jan 2011	@zaabz: then don't post anything
3ton 03. Jan 2011	The password should be such kind:Password!***Hacker!*****Infinity!*! I can not find other part of a code :(
promix17 Author 03. Jan 2011	Yes, it has been packed by my sipmle packer a lot of times))) But I know that is won't be a big ploblem to unpack this programm.
promix17 Author 04. Jan 2011	Can anybody crack this programm?
Minotaurus0 07. Jan 2011	I will try, and i got the algorithm, but i can't reverse it and so i have to use bruteforce. But 14 000 000 000 000 000 000 years is a bit to long time for waiting ^^ I will try another way
promix17 Author 08. Jan 2011	But I think that bruteforce shouldn't be so long)))
Vallani 08. Jan 2011	I can't see a way to reverse it, too. So I've build a program to brute force it but it takes too much time with an alphabet consisting of higher and lower case letters+'!'. If you also don't know a solution, please specify the alphabet, to reduce calculating effort.
promix17 Author 09. Jan 2011	But you shouldn't brute all conbinations, you should find only suitable. So you have to try over N combinations to find suitable password. N less that INT32, that is evident.
CoLinS 09. Jan 2011	Valid keys are without space ;p
andrewl.us Moderator 10. Jan 2011	CoLinS: please submit a proper solution instead of linking to other sites
Minotaurus0 10. Jan 2011	I have no idea. Here are 19.99$, give me the pass ^^
promix17 Author 10. Jan 2011	the_man_with_the_plan: Now write a tutorial, please!!! Congratulaions!!! How long did it take?
apuromafo 20. Feb 2011	some friend was write a solution, doing a xploit, really buffer overflow and changing to see the good value.. here is in spanish: http://ricardonarvaja.info/WEB/CONCURSOS%202011/CONCURSO%201/2011_01_02_Console_Infinity.Jorge.pdf greetings Apuromafo @mod this post is for say that are other type of solution. ;)

promix17's Cube by Promix17

Download Cube_by_Promix17.zip, 360 kb (password: crackmes.de)
Browse contents of Cube_by_Promix17.zip

Primitive Math v1.0
Written by Promix17

Level of dufficulty: 4/10

I think it's the most difficult crackme I've ever done. The goal is to write a
valid keygen. The crackme is really solvable, but it may take a lot of time to
fully understand a protection code. However, programming the keygen isn't easy
enougth, too. Hope that the idea of this crackme will be interesting for you.

Don't give up!

Good luck)))

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 27. Jul, 2012
Downloads: 441

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Dcoder, published 23. aug, 2012; download (925 kb), password: crackmes.de or browse.

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Discussion and comments

mobius 27. Jul 2012	I'm still a beginner, but nobody got anywhere by just reading others solutions :p Here goes the next week, cheers!
mobius 28. Jul 2012	Ahh fuck, I have to get around debug checking! :/
Skripter5000 30. Jul 2012	My Firewall Blocks it!
white_rabbit 13. Aug 2012	Got arount debug checking (he proof the windows name in a thread OllyDBG Ida...) now I am in the continously reading and evaluating input loop, Hmm looks like a math puzzle so far
promix17 Author 15. Aug 2012	Anybody has ideas?
hepL3r 23. Aug 2012	I've started to debug it today , seems you used some antidebug routines + nanomites which prevents olly or other debuggers to debug it :p
deurus 13. Oct 2014	Dcoder awesome like always.

promix17's Emptyness

Download Emptyness_by_Promix17.zip, 209 kb (password: crackmes.de)
Browse contents of Emptyness_by_Promix17.zip

Emptyness 1.0
Written by Promix17

Level of difficulty: 3

What should you do? You should find the correct password)))
You can ask me - where the edit box is, but I think you can
understand it by yourself :-) Note: patches aren't allowed!

Send me your solutions, questions, comments and offers.

E-mail: promix17@yandex.ru

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 04. Mar, 2011
Downloads: 381

Rating

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Solutions

Solution by redoC, published 29. aug, 2012; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

yo-mismo 09. Mar 2011	SelfKeygen is allowed?
compass 10. Mar 2011	The password is from Six mouse click. But i still can't find the relationship between data file and password
promix17 Author 10. Mar 2011	What do you mean by SelfKeygen? Think more)))
redoC 26. Aug 2012	"Well Done!"

promix17's Entangled Code by Promix17

Download Entangled_Code_by_Promix17.zip, 2 kb (password: crackmes.de)
Browse contents of Entangled_Code_by_Promix17.zip

Entangled Code by Promix17
Level of dufficulty: 3

The purpose is to find correct password.

Hope, it will be interesting

Don't give up and good luck :-)

Send me your solutions, questions, comments and offers.

E-mail: promix17@yandex.ru

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 31. May, 2012
Downloads: 240

Rating

Votes: 3
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by bike, published 04. jun, 2012; download (3 kb), password: crackmes.de or browse.

bike has rated this crackme as quite nice.

Send a message to promix17 »

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Discussion and comments

promix17 Author 04. Jun 2012	bike, great solution!
yumi 11. Jun 2012	hello, this is my first time to crack something. i saw some videos, but now i want do it my self. i want to ask if i can dubbug this programs with windows 64 bits, and with olly or ida pro. thanks!
lovejoy226 20. Jun 2012	Hello bike. you have a great insight to see the codes. I wanna be like you someday.
temp002 22. Sep 2012	This took me for about a week before i give up. every part of the pass had its very own tweak. i actually did guess the third part of the pass and tried the whole password while debugging in olly, but it did not work. so i spent a whole day writing my first bruteforce and debugging it to make sure it calculates the sum correctly. and after not getting any result, i concluded that there is nothing that could fill this gap between the serial. now after reading the solution and seeing that i was able to guess the right pass, like 4 days ago, i am angry. but at least i learned a hard lesson: When you put a software breakpoint, even though the debugging software don't show you, the code in the memory will be change. it will be replaced with int3. so if you have a breakpoint where the sum is being calculated, you'll get the wrong sum. Thank you for this awesome Crackme :)

promix17's Hash Crack

Download Hash_Crack_by_Promix17.zip, 9 kb (password: crackmes.de)
Browse contents of Hash_Crack_by_Promix17.zip

Hash CrackME 1.0
Written by Promix17

Level of dufficulty: 3

The purpose is to find correct password. It is olny one.

Don't give up and good luck :-)

Send me your solutions, questions, comments and offers.

E-mail: promix17@yandex.ru

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 08. Feb, 2012
Downloads: 397

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by s3Rious, published 27. nov, 2012; download (11 kb), password: crackmes.de or browse.

s3Rious has rated this crackme as awesome.

Solution by qpt^J, published 10. feb, 2012; download (17 kb), password: crackmes.de or browse.

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Discussion and comments

idid231 09. Feb 2012	Any body interesting in this crackme? I see the FindwindowA and isdebuggerpresent antidebug trick. And 3 big numbers, don't know what to do with them :D. How can i know where the decrypt funtion to break when click button? Can i have some hint please?
promix17 Author 10. Feb 2012	Oh, crackmes.de is open at last!
Zero Moderator 11. Feb 2012	Yes, we are finally back!

promix17's MazeJumps by Promix17

Download MazeJumps.zip, 6 kb (password: crackmes.de)
Browse contents of MazeJumps.zip

MazeJumps v1.0
Written by Promix17

Level of dufficulty: 3/10

The goal is to register this program with the keyfile.

This crackme has unusual code structure. Hope you will like it.

Good luck)))

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 03. Jan, 2013
Downloads: 295

Rating

Votes: 5
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by SFeS, published 20. mar, 2013; download (424 kb), password: crackmes.de or browse.

SFeS has not rated this crackme yet.

Solution by zairon, published 22. jan, 2013; download (7 kb), password: crackmes.de or browse.

zairon has not rated this crackme yet.

Solution by bike, published 09. jan, 2013; download (3 kb), password: crackmes.de or browse.

bike has rated this crackme as quite nice.

Solution by ForFun, published 09. jan, 2013; download (2 kb), password: crackmes.de or browse.

ForFun has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

3ton 05. Jan 2013	key.txt Hello wor1d!
idid231 08. Jan 2013	Mov,Xor, ECX, EDX.. i don't know how to jump direct and remove un-use code. If we follow jump by jump command we must spend pretty much time to reverse longer code, not good.
3ton 08. Jan 2013	KEY DB "********r1d!",0 MOV EAX DWORD PTR [KEY] MOV ECX DWORD PTR [KEY+4] XOR EAX, 0F45A675Dh XOR ECX, 04DDAFA31h ADD EAX, ECX CMP EAX, 0BAE3DC73h MOV EAX DWORD PTR [KEY] MOV ECX DWORD PTR [KEY+4] XOR EAX, 0AADD357Dh XOR ECX, 044FAFC3Ch ADD EAX,ECX CMP EAX,0F23F2C88h MOV EBX, DWORD [KEY+8] CMP EBX,21643172h ;"r1d!"
idid231 08. Jan 2013	I knew its algorithm. I just don't know how to split it out from junk codes. Tell me how did you do 3ton, please.
demoth 08. Jan 2013	I written a little program for deobfuscate this crackme. You can see deobfuscated crackmes here: http://rghost.ru/42840075
demoth 08. Jan 2013	3ton, how you understand what MOV EAX DWORD PTR [KEY] MOV ECX DWORD PTR [KEY+4] XOR EAX, 0F45A675Dh XOR ECX, 04DDAFA31h ADD EAX, ECX CMP EAX, 0BAE3DC73h MOV EAX DWORD PTR [KEY] MOV ECX DWORD PTR [KEY+4] XOR EAX, 0AADD357Dh XOR ECX, 044FAFC3Ch ADD EAX,ECX CMP EAX,0F23F2C88h it is checking "Hello wo"? Just guessed?
demoth 08. Jan 2013	Mmm... I'm idiot. There are many collisions, for example: HelDo wG JetLm oO HOlLoNwO JGldmFwg etc. But message is incorrect for them.
idid231 09. Jan 2013	hi demoth, can i have your source of deobf program? I need your ideal to know how to debof this crackme.
andrewl.us Moderator 09. Jan 2013	two solutions accepted, and neither uses a deobfuscator that emits a cleaner crackmer demoth, submit a solution with your deobfuscator!
ForFun 09. Jan 2013	@bike: Excellent tut !!
3ton 26. Jan 2013	My script for deobfucate crackme. http://rghost.ru/43327252
idid231 27. Jan 2013	Thank you guys for the excellence tut and scripts.
kiTo 08. Apr 2013	3ton: Why post the answer without a solution? Thats just plain stupid. "Check me out, I know the answer but will not share!"

promix17's NEWEB

Download NEWEB.zip, 48 kb (password: crackmes.de)
Browse contents of NEWEB.zip

Find correct serial code for this crackme.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 20. Oct, 2016
Downloads: 250

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

acruel 26. Oct, 09:28	be cautious. it's a trojan packed with UPX.
promix17 Author 26. Oct, 12:06	acruel, you are a reverser - just reverse it and make sure that there's no trojans
acruel 26. Oct, 12:23	of course I did. it's kind of a video opener. did you hide a serial code?? :)
acruel 26. Oct, 13:44	ok. probably i'm missing something. does wallarm have something to do with the answer?
acruel 27. Oct, 14:26	I was totally wrong. This is not what I thought it would be. Interesting :)
nickchang918 18. Nov, 16:48	Surely it is not a trojan, it is UPX packed, unpacking go to the OEP at 401000, then it calls shellExecuteA(,"open", "https://www.youtube.com/watch?v=Yv-vmYfFuYE",...) and then calls existprocess to leave,
acruel 19. Nov, 03:56	of course not. also its enjoyable.
apuromafo 30. Nov, 00:56	entrypoint start here with tls i think: 00474703 55 PUSH EBP if this not jump.>will go to the youtube link 0047489A 74 10 JE SHORT NEWEB.004748AC if jump will be to decode a file in %tmp% with name w.exe this are a upx packed and try to execute in 00474AF3 FF55 90 CALL DWORD PTR SS:[EBP-70] ; KERNEL32.WinExec now in the unpacked w.exe (remember is upx) 004019E6 \|. 8B3D 48204000 MOV EDI,DWORD PTR DS:[<&USER32.SetDlgIte>; USER32.SetDlgItemTextA 004019EC \|. 68 60204000 PUSH w_unpack.00402060 ; /Text = "Enter your name..." 004019F1 \|. 68 E9030000 PUSH 3E9 ; \|ControlID = 3E9 (1001.) 004019F6 \|. 56 PUSH ESI ; \|hWnd 004019F7 \|. FFD7 CALL EDI ; \SetDlgItemTextA 004019F9 \|. 68 74204000 PUSH w_unpack.00402074 ; /Text = "Enter your serial..." 004019FE \|. 68 EA030000 PUSH 3EA ; \|ControlID = 3EA (1002.) 00401A03 \|. 56 PUSH ESI ; \|hWnd 00401A04 \|. FFD7 CALL EDI ; \SetDlgItemTextA im not studied the algo, but user can be any, serial have filter of 20 and some values, start in pushad end in popad, if fill with nop from pushad (from here) to popad) show the good boy: 00401B8B \|. FF15 20204000 CALL DWORD PTR DS:[<&USER32.MessageBoxA>>; \MessageBoxA you do it :) nice, but you need a serial, with my bogus serial crash ..with patch is show the valid msg BR, Apuromafo
apuromafo 30. Nov, 01:54	done i was founded the serial correct i will send the solution :)

promix17's Primitive Math

Download Primitive_Math.zip, 169 kb (password: crackmes.de)
Browse contents of Primitive_Math.zip

Primitive Math v1.0
Written by Promix17

Level of dufficulty: 5

This is quite difficult CrackME: you should be not only good cracker - you should
know some math yet... But don't worry about last at the beginning - find, reverse
and understand protection code first :-) I hope you will like this CrackME. Don't
give up!!! It's a really solvable and keygenable CrackME.

And of cause the purpose is to make a keygen. Good luck!

Send me your solutions, questions, comments and offers.

E-mail: promix17@yandex.ru

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 23. Mar, 2011
Downloads: 634

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by tamaroth, published 08. apr, 2011; download (5 kb), password: crackmes.de or browse.

tamaroth has not rated this crackme yet.

Solution by Dcoder, published 07. apr, 2011; download (260 kb), password: crackmes.de or browse.

Dcoder has not rated this crackme yet.

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Discussion and comments

tamaroth Moderator 31. Mar 2011	I think there's a small error in your code in the middle of checking routine. After you've checked first two characters of serial, you then proceed do next function. This function is decrypted with a byte (let's call it a key) equal to some form of crc of code. The value should be 0x5D, and when first time it's decoded, everything works fine. But unfortunetaly at the end of the procedure you crypt it again, this time with the key equal 0x2B, and thus on next time, when checking the code, crackme decrypts the code wrongly and you end up with a crashed crackme. example: tamaroth EO34567890103 run it and click check twice, after second click it will crash :( One more thing, you should take care of this additional process you create, after you exit from the crackme it persists in system, you are also able to run multiple copies of that process (good idea would be to check mutex or smth like that) Despite this, I've patched my version with proper values and I'm going further, so far it was fun :)
promix17 Author 01. Apr 2011	Yes, there is small bug. It may be so, becouse I started coding programm with C++ and finished with OllyDbg, so didn't notice this part of code...I only can say, that this bug can't appear in practice when you are legal user. I think a lot about additional process but again have a mistake. It should end in a minute but it doesn't... And about mutexs: if you use a mutex, when you kill process mutex doesn't dissappeared -> so next time additional process won't run. But the most interesting will be later. Really the idea of crackme let me even show you source code, but whith additional protection it will be more harder)))
tamaroth Moderator 01. Apr 2011	If you assume that you enter the correct serial once, then yes, I agree. But it's rather dangerous bug for a legal software :) And about mutexes: when process ends, you should kill mutex you control, so you can run the program again :)
promix17 Author 08. Apr 2011	Thanks for all solutions. Next time I will try harder and qualitative.

promix17's SecureConsole

Download secure_console.zip, 133 kb (password: crackmes.de)
Browse contents of secure_console.zip

The goal is to find correct PIN's and corresponding correct flag (CTF based crackme).

To run crackme use docker:

docker build -t secure-console ./
docker run -d -p 8080:80 -ti secure-console

Or use live mirror:

http://console.icats.cc/

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Assembler

Published: 20. Oct, 2016
Downloads: 118

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

acruel 21. Oct, 11:39	solved it on my local pc emulator, but it says "Well done, but try to run it with js" before it shows me the flag. am i doing something wrong? :)
promix17 Author 21. Oct, 16:06	Original ISO is runned by JS emulator, you should check PIN's under original environment.
acruel 21. Oct, 16:43	Well I got the same result on the website of the emulator's author: https://copy.sh/v86/. But the same PINs are rejected on your mirror website. So I want to ask just to make sure if you modified the JS emulator (libv86.js) or not.
promix17 Author 22. Oct, 18:38	You have full application into zip archive. You can use docker to run it or use live mirror. Original https://copy.sh/v86/ doesn't matter. The goal is to find correct PIN's for given application.
acruel 23. Oct, 03:08	thanks. I'm gonna try docker. Can the message "Well done, but try to run it with js" be skipped before the flag is shown? sry for asking many questions.
acruel 23. Oct, 15:30	anyway, i submitted my answer. thanks.

promix17's TinyAsm by Promix17

Download TinyAsm.zip, 2 kb (password: crackmes.de)
Browse contents of TinyAsm.zip

TinyAsm by Promix17
Level of dufficulty: 0

I've recently found my first crackme which was
written in asm. A lot of memories have came...

The purpose is to find correct password

Good luck)))

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 19. Sep, 2012
Downloads: 1175

Rating

Votes: 6
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by morecode, published 06. oct, 2012; download (203 kb), password: crackmes.de or browse.

morecode has not rated this crackme yet.

Solution by syspher, published 02. oct, 2012; download (4 kb), password: crackmes.de or browse.

syspher has not rated this crackme yet.

Solution by ARCHANGEL, published 02. oct, 2012; download (38 kb), password: crackmes.de or browse.

ARCHANGEL has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

mausy131 19. Sep 2012	Nice Crackme, Thanks!
whizz 19. Sep 2012	Got the key, will submit the tutorial by tomorrow. :)
crackamania 25. Sep 2012	I got the correct key, But in olly, it take me to wrong path.. Dont understnd why.... I am a newbies.
ksydfius 25. Sep 2012	thats because of the anti-debugging code if you run it without a debugger than the key works fine :) nicely written code, thx -ksydfius
syspher 01. Oct 2012	Nice crackme ! I submitted my solution.
Brentbmwh 03. Oct 2012	why cant i open this program in olydbg? it terminates
draww 06. Oct 2012	@Brentbmwh: do you know anything about IsDebuggerPresent API or anti-debugging? when you find out, you'll have your answer.
sa2304 11. Nov 2012	It's really nice to play with this crackme :) After reversing code I had only one undecided question: is there a trick to check code integrity? ;;--------------------------------------------------------------------------------------------------------------- .text:0040134A checkCodeIntegrity: ; CODE XREF: sub_401126+18Aj .text:0040134A ; DATA XREF: sub_401126+233o .text:0040134A nop .text:0040134B nop .text:0040134C nop .text:0040134D nop .text:0040134E nop .text:0040134F mov edi, offset loc_40127E .text:00401354 mov ebx, 5DAAFCF2h .text:00401359 mov ecx, offset checkCodeIntegrity .text:0040135E sub ecx, offset loc_40127E .text:00401364 .text:00401364 loc_401364: ; CODE XREF: sub_401126+247j .text:00401364 mov eax, [edi] .text:00401366 xor eax, ebx .text:00401368 shl ebx, 1 .text:0040136A xor ebx, eax .text:0040136C inc edi .text:0040136D loop loc_401364 .text:0040136F sub eax, dword_403009 .text:00401375 jz loc_4012B5 .text:0040137B jmp short badKeyDetected ;;---------------------------------------------------------------------------------------------------------------
paradoxxl 29. Nov 2012	Beginner-friendly crackme. Thank you :)
NeoCortex 15. Jan 2013	Nice crackme. I just solved it, that one was realy fun! Thanks.
Fenix01 07. Jul 2013	nice crackme :D
Schinken 03. Aug 2013	My first CrackMe and solved it Nice one ;-)
c0R3 05. Aug 2013	pretty good crackme ;D particularly for newbie
deibiz_xxl 15. Sep 2013	@sa2304 I'm there too... and I think that it has nothing to do with code integrity, because it just loads numbers, not contents of addresses...
deibiz_xxl 15. Sep 2013	@sa2304 i'm retarded... it does, forget that, but yes, it has something to do with integrity, but on memory...
kairouseki 13. Jul 2015	Nice crackme, thanks! And thanks to ARCHANGEL for the explanation behind the code integrity check.
analpapst 18. Sep 2015	i saw it and i want to do it, too. i like it yammy yes.

protexec's uxtt

Download uxtt.tar.gz, 1 kb

This crackme uses a few different techniques to throw you off. Ptrace is NOT one of them ;)

Your job is to spawn the hidden shell inside of it. How you go about doing this is up to you. One rule, no patching ;) Enjoy!

Extra points for whoever tracks down the bugs it exposes in the readelf utility (I didnt have the time to look into it).

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 02. Oct, 2006
Downloads: 336

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by crp-, published 07. oct, 2006; download (1 kb), password: crackmes.de or browse.

crp- has rated this crackme as nothing special.

Send a message to ProTreeBrain »

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Discussion and comments

crp- 02. Oct 2006	$ ./uxtt Segmentation fault $ is this expected?
protexec Author 02. Oct 2006	Yes it is expected :) Also I would downgrade the difficulty on this crackme to a 3. I must have accidently clicked 4. My apologies.
crp- 02. Oct 2006	jep, already noticed it. indeed 4 seems a bit high if i interpret correctly what i see :)

ProTreeBrain's ProTreeBrain's crackme #1

Download crackme_1.zip, 1 kb (password: crackmes.de)
Browse contents of crackme_1.zip

I do not know if it is a good crackme, I hope learn it something.

Good luck!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 12. Nov, 2006
Downloads: 1273

Rating

Votes: 6
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by BaKaE, published 18. nov, 2006; download (4 kb), password: crackmes.de or browse.

BaKaE has rated this crackme as nothing special.

Solution by Ank83, published 18. nov, 2006; download (8 kb), password: crackmes.de or browse.

Ank83 has rated this crackme as awesome.

Solution by boonz, published 18. nov, 2006; download (5 kb), password: crackmes.de or browse.

boonz has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

hardcoder 12. Nov 2006	If patching is allowed..too easy to solve . Just 3 or 4 antidebugging checks .. Loved the way you check for bps and patched bytes
Fergo 12. Nov 2006	Very nice and clear code. Congratz.
ProTreeBrain Author 13. Nov 2006	Hi! Wednesday will come my second crackme.
ty123 13. Nov 2006	Yes! Nice anti-debugging codes! The SN is there obviously, the author wants us to play his anti-debugging codes I think.
ProTreeBrain Author 13. Nov 2006	Yes ty123 I want show you something nice. And If somebody have the solution, please send it. And, how it works with OllyDbg? :-{}
ProTreeBrain Author 13. Nov 2006	For HARDCODER: And some else solve of this cracking? It can't be solve any else way. It is possible to crack only with patching, if you want destroy all NAGs.
HMX0101 13. Nov 2006	Patching and serial fishing is damn easy... ;)
EvOlUtIoN 13. Nov 2006	Yes, there is only one good password, and you need just a calculator to find it! good ideas to protect from debugger, i'm waiting for an harder version!
Am0k 13. Nov 2006	this one is very easy, but nice debugger tricks :)
ProTreeBrain Author 14. Nov 2006	For EvOlUtIoN: What name is that calculator?
ProTreeBrain Author 14. Nov 2006	FOR EVERYBODY: Is good make a crackme, what it be uncrackable for a long time? I think, when I make a very hard crackme, I will very unpopular in crackmes.de. I think, I can solve a harder crackme, but I have not a lot of time. :-( Should I do a uncrackable crackme (in real time)?
BaKaE 14. Nov 2006	@ ProTreeBrain just use the windows-calculater (it can convert hex into dec) and yes try to make a harder crackme (level 3 for example)
ProTreeBrain Author 15. Nov 2006	I am not very experienced reverser, but in the some ways I am clever. I would to please you to VOTE for my crackme, I want to know how quality it is. And I can improve my skills. But I have one question: I can'nt start SoftIce under Win XP. Always it writes Error 31, what is some error with VGA. I have already Win NT 2.7 or 2.6 update. Any solution?
BaKaE 15. Nov 2006	i vote it and submitted a solution i have xp to!! you need driverstudio 3.x for using softice i think it was coded for 95/98 (NT) but xp is more complex than thoose so a update didnt work i have ds 3.2 and it worx fine
hardcoder 16. Nov 2006	Crackmes written in Assembly language are always great.. You got my vote too.We want some more man (of course harder than this one).
boonz 20. Nov 2006	thanks a lot for your advice (in your solution), Ank83! greetings boonz
ProTreeBrain Author 21. Nov 2006	Yes, and I finding for the best cracker on this ground. I am very insteresting in cracking.
ouchast 31. Dec 2006	Nice one. Solved it without patching :)
Ank83 31. Dec 2006	Happy New Year Regards Ank83
deibiz_xxl 28. Jul 2007	you have commited an "error" there are an infinity of valid serials...
deibiz_xxl 28. Jul 2007	and i can prove it...
KernelJ 28. Jul 2007	Well, prove it then lol. This crackme is closed now...
deibiz_xxl 29. Jul 2007	I can post two valid serials but i dunno where to post it
deibiz_xxl 29. Jul 2007	supposing X a valid serial, for example X-a X abcdef are too valid serials... it's because an "error" on some comprobations after calling an API.

prout's The thing

Download thething.tar.gz, 5 kb

This is a simple command line app which asks for a name and a serial.
The difficulty is not really on the algo but is where is the algo...

Just write a keygen for this...

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 12. Mar, 2007
Downloads: 423

Rating

Votes: 5
Crackme is boring.

Rate this crackme:

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Solutions

Solution by Yoha, published 14. feb, 2013; download (33 kb), password: crackmes.de or browse.

Yoha has not rated this crackme yet.

Solution by lagalopex, published 06. may, 2007; download (1 kb), password: crackmes.de or browse.

lagalopex has rated this crackme as boring.

Solution by macabre, published 21. mar, 2007; download (7 kb), password: crackmes.de or browse.

macabre has rated this crackme as nothing special.

Send a message to pulsar-tr »

View profile of pulsar-tr »

Discussion and comments

prout Author 09. Mar 2007	If someone has any problem to execute this crackme, please leave me here a comment and and I will upload a new version. Good luck. Regards.
macabre 09. Mar 2007	I have a box that is running glibc 2.3.6 and I think this is compiled for 2.4...any chance you have a box with an older glibc you can compile this on?
prout Author 09. Mar 2007	Ok, you are not the first who tells me about that :-( So, please wait a little while I check on my old Linux distros and reinstall it. I will soon deliver you a more portable version... Thanks for your report...
macabre 09. Mar 2007	Thanks! I haven't been able to run it yet but what you do with the virtual address mapping is very nice! :D
prout Author 12. Mar 2007	:-) It should be ok now. I compiled it under Slackware 11.0 which uses glibc 2.3.6. Tell me if you have any trouble with this version...
macabre 13. Mar 2007	I don't have much time today to look at it but I did test it and it seemed to run fine on my debian machine!! Thx! :D
macabre 14. Mar 2007	Solution submitted. You method is quicker than parsing the ELF header. neat!
prout Author 21. Mar 2007	Good work Macabre. It was my first keygen, and I don't know how to strip an elf, so I modified the elf header with an hexeditor to hide section headers... Since I'm a beginner, I found your solution very interesting. And in fact, since ald seems not to be maintained for two years I didn't think to use it before. See you soon here, I hope... :-)
macabre 21. Mar 2007	There are a couple of things for elf headers. sstrip comes with elf kickers and Elfsh has a method as well. Elfsh is probably best. I didn't use to use ALD until I saw crp- here use it on one of his solutions ;) I'm glad you liked my solution! :D
prout Author 23. Mar 2007	Ok thank you. Actually what elfsh can't do... :-)

pulsar-tr's Pulsar Crackme Very very easy

Download crkme01.zip, 8 kb (password: crackmes.de)
Browse contents of crkme01.zip

This is very very easy crackme for NewBie's.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 26. Aug, 2004
Downloads: 4295

Rating

Votes: 7
Crackme is boring.

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Solutions

Solution by zombie8, published 05. oct, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by tiocsti, published 11. sep, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by _pusher_, published 28. aug, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by alexandra, published 28. aug, 2004; download (978 b), password: crackmes.de or browse.

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Solution by MaBi, published 28. aug, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by NBS, published 28. aug, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by BoR0, published 28. aug, 2004; download (8 kb), password: crackmes.de or browse.

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Solution by Plasmator, published 28. aug, 2004; download (42 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

deibiz_xxl 25. Jun 2005	This has helped me a lot, now i understand many new things, so thankyou pulsar.
doxob 25. Aug 2005	This has helped me too! It let me know many things. thinx you !
DavidxLoco 28. Aug 2005	HoHo, Very nice crackme for newbie like me. Thank you!
kolistivra 31. Dec 2008	we learned a lot thanx
ReWrit 21. Feb 2009	rly nice crackme for beginners, its learnd me alot =) thx man
imanoob 06. May 2009	can some say me how its work i have ollydbg i see vieos on youtube but i dont understand what they make
Noteworthy 24. Apr 2011	MADE ME SOMETHING HARD OR I ^ \| \| @#####@ (### ###)-. .(### ###) \ / (### ###) ) (=- .@#####@\|_--" /\ \_\|l\|_/ (\ (=-\ \|l\| / \ \.___\|l\|___/ /\ \|_\| / (=-\._________/\ \ / \._________/ # ---- # # __ # \########/ SHOOT YOU
IsmailAbdullah 08. Sep 2012	I made something like JMP 004012FF. Hope you didnt expect me to figure out the right key. Was too lazy for that.
blue_devil 09. Sep 2012	@ismail 2004 yılında açılmış konu pulsar çoktan bu işleri bıraktı dostum This is an easy crackme, just be careful ;)
bolzano_1989 30. Dec 2012	Does anyone have the password for the source code included in this crackme archive (src.zip)?

_pusher_'s Crackme #1

Download crackme1.zip, 159 kb (password: crackmes.de)
Browse contents of crackme1.zip

Crackme #1

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Aug, 2002
Downloads: 2076

Rating

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Solutions

Solution by DiKeN, published 08. aug, 2002; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

PutterPlace's PutterPlace's CrackMe #2

Download CrackMe2.zip, 135 kb (password: crackmes.de)
Browse contents of CrackMe2.zip

This one shouldn't be very hard to break. Much easier than my last one. All you have to do is get the proggy to accept any name and registration code. This program check the registration info when it starts up, so you have to make it to where it will always be shown as valid information. If you succeed then the nag screen will no longer appear.

Rules:

1.) Patching only.
2.) Do not keygen this crackme. That is not why it's here.

Submit your solutions to crackmes.de, and also email them to me at 'putterplace@cox.net'.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 03. Sep, 2006
Downloads: 531

Rating

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Solutions

Solution by hardcoder, published 07. sep, 2006; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 03. Sep 2006	i done it! But when you say ANY username means that it should also accept any user and pass length or you have only to register according the right length?
fatzbitz 03. Sep 2006	done it also and i have the same questions ? so ...
PutterPlace Author 04. Sep 2006	You don't have to worry about the user and pass length. It should just register with anything according to the correct length.

PutterPlace's WordMaster CrackMe 1.1

Download WordMaster.CrackMe.1.1.zip, 285 kb (password: crackmes.de)
Browse contents of WordMaster.CrackMe.1.1.zip

You must, first, bypass the "EXE corrupted" message. Then you have
to make this program last FOREVER. You are only allowed to patch
this file.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 31. Jul, 2006
Downloads: 509

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

Zaphod 03. Dec 2006	A long time ago I tried to solve this crackme. I couldn't. Then I thought - okay, I'll have to wait until someone posts a solution. But nothing happens! There must be some expert out there who can solve this one - please?
PutterPlace Author 04. Dec 2006	Lol. There has to be someone that can do it....

pwn's Crackme 1

Download Crackme1.zip, 2 kb (password: crackmes.de)
Browse contents of Crackme1.zip

Fun crackme, mainly for begginers.
Has some anti-debugging tricks and modified pe headers.
After you pass the anti-debugging you just need to fish out the serial.
File isnt packed. Total code size is 732 bytes, so even if you new dudes are having trouble, it shouldnt take you too long to finish it.
Ant its great to learn the basic antidebugging and PE Header.
hf you all.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 12. Oct, 2005
Downloads: 904

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by deroko, published 13. oct, 2005; download (4 kb), password: crackmes.de or browse.

deroko has rated this crackme as quite nice.

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Discussion and comments

deroko 12. Oct 2005	heh nice one =)
Shism 12. Oct 2005	pretty good.. Ill "decompile" your code :) and use the parts I like ;0
Shism 12. Oct 2005	oh Just noticied your code is compressed lol ;)
pwn Author 12. Oct 2005	Im glad you guys like it...
MaxM 17. Oct 2005	eheh, nice:) I left header untouched, bpxed seh and your CRC caught me anyway - you got back at de10be instead??? where the hell you set it? Under my nose.. :D
MaxM 18. Oct 2005	When can we see the next one?? :)
KoЯn Rulz 30. May 2008	Somethings wrong, it says "Invalid Win32 PE File Type." when i load it into W32DASM, HIEW, Or OllyDBG
TiGa 30. May 2008	Have you thought of reading the already available solution? It might tell you what is wrong with the crackme and why it doesn't load.

pxor's Keygenmev1 seasy

Download keygenmy.zip, 2 kb (password: crackmes.de)
Browse contents of keygenmy.zip

Pure and simple keygen no patch :P"

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 03. Jun, 2005
Downloads: 1109

Rating

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Solutions

Solution by ap0x, published 12. jun, 2005; download (15 kb), password: crackmes.de or browse.

ap0x has rated this crackme as nothing special.

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Discussion and comments

pxor Author 04. Jun 2005	WTF? no one cracks it yet?! LOL :D ill know thats newbies dedicated but.... u can't call yourself cracker if u dont crack it ;D
pxor Author 04. Jun 2005	i'm waiting for your solutions :P
Oorja-HalT 06. Jun 2005	shudd up pxor . you know its just elementry anyone can write a keygen just ripping yours code.There aint anything special in it
pxor Author 06. Jun 2005	ohhh i cant see your solution on my mail box .... resend your solution plz haha
pxor Author 07. Jun 2005	i receive first solution from Renno (good job :P) anyone more ?
pxor Author 07. Jun 2005	Another solution received from Mario/MBE (your solution is that what i want) :D
Orphankill 08. Jun 2005	I have it pretty muched solved all the way down to the final comaprison. I'm just confused in predicting what the FST (stack?) will be after an instruction like FLD. It seems random to me, and then you load FST into AX and cmp AX with 47! A little help, please?
DLAP 08. Jun 2005	I'm also was confused by this, but after some time, i understood, that it is Floating point operations. I almost crack it, but yesterday i haven't enough time to read a special literature for this. And i have not have any books about coprocessor. P.S. Sorry for my English.
pxor Author 08. Jun 2005	download intel x86 opcodes documentation u will find there all that u need :P http://members.shaw.ca/contact_donkey/files/x86eas.hlp
pxor Author 09. Jun 2005	YES this is correct (good job) :D
Orphankill 11. Jun 2005	I figured out what the floating point instructions do, and where they store there results (ST0, ST1, ST2...), I just don't understand the FST! I dowloaded some information on it buty still can't quite get it. Anyone? Why does the FST hold what it holds???
CuTedEvil 11. Jun 2005	ap0x, why don't you submit your solution instead of just posting a url? :)
ap0x 12. Jun 2005	Didn`t have time for writting a solution, i just keygened it... Ok, i`ll write soon :)
CuTedEvil 12. Jun 2005	Nice work ap0x :)

pxor's KeygenMe v2

Download keygenme_v2.zip, 3 kb (password: crackmes.de)
Browse contents of keygenme_v2.zip

This is another keygenme by me ;P its easy and dedicated to noobs so get to work.....

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 23. Jun, 2005
Downloads: 858

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Solutions

Solution by Knight, published 29. jun, 2005; download (22 kb), password: crackmes.de or browse.

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Discussion and comments

jeromecrea 23. Jun 2005	Lots of xlate tables. Gotten the first 8 chars with my m4d n00b sk\|11z in about 6 hours. :P
pxor Author 23. Jun 2005	i don't care :PP get to the work !! :-D
SunSatION 23. Jun 2005	Yes, too muuuch :)
renno 24. Jun 2005	I got 9 chars in about 10 seconds :D
renno 24. Jun 2005	sorry, mistake 13 chars, reverse first loop, and gues rest
jeromecrea 24. Jun 2005	Slowly made it up to L004012BF, and looks like it's about to get harder again. Finding that starting "X" from goodboy values is getting easier from practice though. Using only a disassembler and the exe is like working with stone and chisel! :)
pxor Author 26. Jun 2005	No one cracks it yet ? LOL ? :D
Knight 28. Jun 2005	Cracked it in couple hours. Solution is coming.
pxor Author 28. Jun 2005	YEA! thats what i like :P (hope your keygen generate xxx valid serials for any name)
Knight 29. Jun 2005	Yes of course it can. But... i know that there is bug in my keygen that i can't find, so some of those xxx serials are fake.
pxor Author 29. Jun 2005	_CantFindGetOtha: mov esi,offset name mov edi,offset serial+13 mov ebx,offset s_dat1 mov ebp,8 _GenAnotherPart: xor ecx,ecx dec ecx rdtsc and eax,11111111b ;X mov dl,al xlatb xor al,byte ptr [esi] ;X xor N inc esi _SearchForSameAsAl: inc ecx cmp ecx,256 jz _CantFindGetOtha cmp byte ptr [ebx+ecx],al jnz _SearchForSameAsAl mov al,dl stosb mov al,cl stosb dec ebp jnz _GenAnotherPart mov ecx, 8 lea edx, [serial+13] lea esi, name lea ebx, s_dat1 B: call rand mov [edx], al xlat xor al, [esi] push ecx mov ecx, 100h lea edi, s_dat1 repne scasb not cl mov [edx+1], cl add edx, 2 inc esi pop ecx dec ecx jnz B ..... hope u understand :P
pxor Author 29. Jun 2005	One of invalid serials generated by your keygenme...... name: d9a serial:Kocham Gosie-87881C0FFFAD1E3A574C1B0AF43BAD3FA8BD76B03DD0011D57ACA35D4AF1624BAF
pxor Author 29. Jun 2005	lea esi, [serial+13] ;get 4'th part mov eax, [esi] xor eax, [esi + 4] xor eax, [esi + 12] mov [esi + 12], eax ;get 3'rd part xor eax, [esi + 8] xor eax, [esi + 4] mov [esi + 8], eax ;get 1'st part xor eax, [esi] xor eax, [esi + 12] mov [esi], eax ;get 2'nd part xor eax, [esi + 4] xor eax, [esi + 8] xor eax, [esi + 12] mov [esi + 4], eax for siure this is good but there is another way to reverse it too ;p mov esi,offset serial+13 mov edi,offset RevShitHere mov eax,dword ptr [esi+4] xor eax,dword ptr [esi] mov dword ptr [edi+4],eax mov eax,dword ptr [esi+8] xor eax,dword ptr [esi+12] xor eax,dword ptr [esi] mov dword ptr [edi+8],eax mov eax,dword ptr [esi+12] xor eax,dword ptr [esi] xor eax,dword ptr [esi+4] mov dword ptr [edi+12],eax mov eax,dword ptr [esi+4] xor eax,dword ptr [esi+8] xor eax,dword ptr [esi] mov dword ptr [edi],eax A=nB xor nC xor nA B=nB xor nA C=nC xor nD xor nA D=nD xor nA xor nB
Knight 30. Jun 2005	About the first one well your code does same as mine, just checks if value was realy found. I think it's not necessary but even with that check it still sometimes fails. About the second. A think there is no big difference which one to use, just mine uses only one buffer.

pxor's Serialiseme seasy

Download serialme.zip, 2 kb (password: crackmes.de)
Browse contents of serialme.zip

SerialMe v1 easy job just find 1 valid serial"

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 09. Jun, 2005
Downloads: 1703

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Solutions

Solution by phueghy, published 17. jun, 2005; download (37 kb), password: crackmes.de or browse.

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Discussion and comments

pxor Author 09. Jun 2005	Already cracked by Mario/MBE (good job man :P)
phueghy 15. Jun 2005	Hello there, I cracked it too and am writing a little essay about it now.
pxor Author 15. Jun 2005	phueghy crack it also send to me tutorial + keygen :D
Keox 19. Mar 2006	It's toooooooooooooooooo easy...

python's Pythons FishMe#1

Download FishMe#1.zip, 9 kb (password: crackmes.de)
Browse contents of FishMe#1.zip

Written in: VB.Net
Written on: 5.April.2010

Rules:
-No patching

Goals:
-Fish a key that matches to your username
-Write a tut and a solution (should include: how got the keys hidden after generating?)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 09. Apr, 2010
Downloads: 424

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Solutions

Solution by The-God-of-all, published 18. apr, 2010; download (20 kb), password: crackmes.de or browse.

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qfqe's crackme 0x01 by qfqe

Download crkm0x1.zip, 1736 kb (password: crackmes.de)
Browse contents of crkm0x1.zip

It's very easy.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Python

Published: 14. Dec, 2008
Downloads: 650

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Solutions

Solution by GUAN DE DIO, published 19. mar, 2009; download (214 kb), password: crackmes.de or browse.

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Discussion and comments

xrem 17. Dec 2008	Is patching allowed?
aout 17. Dec 2008	FYI: Just because you may have used an easy algorithm, this is not an easy crackme. Reversing py2exe'd files is complex. First we have to understand how/where the Python byte code is stored, then extract it and eventually decompile the byte code back to Python code.
synak 22. Dec 2008	bytecode is stored in the resource section of the exe, version python 2.6 i believe. unfortunately no free decompilers to handle 2.6.. also, appears that py2exe mangles python's magic number (first bytes of the pyc embedded in the resource section)..
aout 23. Dec 2008	Yeah I know it's stored in a ressource, I read the py2exe source, but I didn't quite get if it's one file or many or whatever. Searching for zip signatures in the dumped resource file gives you a good handful of 320 hits. py2exe seems to concatenate each zipped pyc file or something like that. Altogether way harder than the author thought it to be ;)

qHF;'s ASM is fun

Download qhfasmcrackme.zip, 1 kb (password: crackmes.de)
Browse contents of qhfasmcrackme.zip

Acceptable Solutions:
Loader
Serial Fisher (the program gets the serial out of the crackme)
Keygen

Non Acceptable Solutions:
Just serial fishing your own serial
Patch
Anything else not in the list of acceptable solutions

Shouldn't be too hard at all...
my first program in assembly :P
Source on request
sorry if my coding is sloppy :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 26. Jan, 2010
Downloads: 1600

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by DjH2oo7, published 29. jan, 2010; download (78 kb), password: crackmes.de or browse.

DjH2oo7 has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

DjH2oo7 27. Jan 2010	Keygen has been uploaded :>
djpnewton 27. Jan 2010	keygen uploaded great test for a beginner
qHF; Author 27. Jan 2010	good job for writing the keygens. now I want to see other acceptable solutions :)
Dooms_day 28. Jan 2010	well, i phished the key easily, lets see if i can make a keygen...
qHF; Author 28. Jan 2010	Yes, my newbie crackmes tend to be particularly easy to serial fish which is why I have to put "no just serial fishing your own serial" in the list of non-acceptable solutions. This should be pretty easy but you can message me if you get stuck on the routine.
NicoPyright 29. Jan 2010	Keygen upload. I don't know if it's a valid Keygen.
andrewl.us Moderator 29. Jan 2010	four submissions, but only DjH2oo7 read the rules (tutorial + keygen + src required)
th3flood 30. Jan 2010	nice crackme :D my keygen: http://uploaded.to/file/74uo5w (because of: "The submission of solutions is closed." :( )
m477hi45 05. Feb 2010	quit simple, but nice ;)
escortkeelcrack 19. Apr 2010	DjH2oo7's Keygen has a Virus! Don't touch it!
izlesa 23. Apr 2010	when key is valid, eax is not poped and stack damaged. ))
m0niSx 10. Jun 2010	good job, i solved this in 5 minutes, but was so fun and my first one
UserX 09. Mar 2011	Thanks for your keygen qHF. I like your work! I've solved your Full PatchMe as well. You make excellent exercises for those just starting out. Anyhow, I made the program self keygenning for fun then I decided to make a keygen ;) Looking forward to solving your other cracks as well.
mausy131 30. Apr 2012	Nice crackme. cracked it in 2 minutes.
deepfocus 07. May 2012	i'got it,because long time use :(
Schinken 04. Aug 2013	Very good for Beginners, nice one ;-)
d4rK_r3v3rs3R 17. Oct 2014	Nice crackme, interesting for newbies like me :) I did a keygen: http://www.filedropper.com/kgen6_1 I'm in love with Python very good languague to create keygens<3
Hacklearn91 03. Apr 2015	This was my first crackme and i made it!
RagingGrim 04. Jul 2015	Did you notice that you don't exit your program correctly ? Also even though this is flagged as assembly your using functions from the C Library - not that there's anything wrong with that however you should stay away from gets.

qHF;'s Full PatchMe

Download patchme.zip, 4 kb (password: crackmes.de)
Browse contents of patchme.zip

Patch this crippled crackme!

Tasks:
Patch the beginning and the end nags
Enable the File->Save option
Change the File->Save text
Patch so the listbox button works
Patch the about to something other than unregistered
Change Caption

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 08. Nov, 2009
Downloads: 1216

Rating

Votes: 4
Crackme is boring.

Rate this crackme:

Solutions

Solution by pmaster, published 17. nov, 2009; download (6 kb), password: crackmes.de or browse.

pmaster has rated this crackme as quite nice.

Solution by RaH-, published 12. nov, 2009; download (6 kb), password: crackmes.de or browse.

RaH- has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

RaH- 11. Nov 2009	A nice beginner crackme. Was my first attempt at a crackme without cheating. I recommend this one if you are just starting out.
Dharok 13. Nov 2009	ummm...i am a newbie! a very newbie..i dont know nothing..what program i should dowload..or...what i should do..:c any can help me? plz!!!
qHF; Author 14. Nov 2009	Nice solution, RaH-. Dharok, if you really have absolutely no idea what to do to start reversing, please watch all of these videos: http://tuts4you.com/download/patchme.zip.php?list.17 They are what I am sure a lot of people (including me) started out with. If you have a little better idea than that, you can check out RaH-'s solution where he explained what tools he used to patch this crackme and how he did it.
RaH- 14. Nov 2009	Dharok, if you download the solution I posted I included links to all the tools I used to crack it.
Dharok 15. Nov 2009	Ermm...thank so much guys..if any can be my teacher..is good..i am a good student..xd..and...if i look it good i have all the tools! 0.0
jabol61 13. Feb 2010	Very nice patchme :) I'm newbie, and it helped me :)
madmaurice 11. Jul 2010	good one :) for newbies like me :P but the "enable save button" was too easy.
Lethargy 07. Jan 2011	this was fun ;D

qHF;'s qHF's CrackMe#1

Download qHFCrackme1.zip, 157 kb (password: crackmes.de)
Browse contents of qHFCrackme1.zip

Rules:
No Patching

Keygen is a must!
tutorial if you have the time.
but minimum is a solution.

~qHF

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 24. Aug, 2009
Downloads: 622

Rating

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Solutions

Solution by cyberdog, published 23. sep, 2009; download (462 kb), password: crackmes.de or browse.

cyberdog has not rated this crackme yet.

Discussion and comments

qHF; Author 07. Nov 2009	Very nice tutorial cyberdog! Well written and easy to follow.

qHF;'s Unique Code CrackMe

Download qhfuniquecodecrackme.zip, 21 kb (password: crackmes.de)
Browse contents of qhfuniquecodecrackme.zip

Name: qHF's Unique Code CrackMe
Difficulty: 1 Easy, for Newbies
Language: C++
Author: qHF

Rules:
Make a keygen for this unique crackme.
You are allowed to display the "key" as
a string of 1's and 0's (1 = checked,
0 = unchecked).

Example (working key):
qHF;
0011110001

No Patching.
Write a solution or a tutorial if you like
it a lot and have some spare time on your
hands.

by qHF

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 16. Nov, 2009
Downloads: 1032

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by [xorolc], published 13. jan, 2010; download (277 kb), password: crackmes.de or browse.

[xorolc] has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

c0nfig 23. Nov 2009	Interesting keygenme :)
qHF; Author 23. Nov 2009	Please do not just post your keys. A lot of replies here have been removed because people have been just posting their keys. The goal of this crackme is to write a keygen. You may comment about this crackme, hints, discuss the checking routine, etc. Looks like no one here that are commenting are getting close to the routine.
Dionosis 24. Nov 2009	True, because in the case of this keygenme, serial fishing is a lot easier than keygening.
c0nfig 25. Nov 2009	>serial fishing is a lot easier than keygening. yep :D Keygenme = Keygen. Just look in EAX Register and copy key, There's a whole Keygen
qHF; Author 26. Nov 2009	Yes, you can also push the string and jump to a messagebox, but that isn't the point. Look at the routine, discuss the routine here, not just "how to find the key just for lolz". Analyze the checking routine, if you get stuck, post your comments here, otherwise figure it out and write keygen then upload your solution for everyone else to learn how it works. The point is to see how the crackme works, not where it stores your key.
c0nfig 28. Nov 2009	-_- The point is to see how the crackme works, not where it stores your key. bla-bla-bla... The point is to get serial :) qpt^J: KeyGenMe 3 - here it realized better :)
DeFiNe No HerOz 15. Jan 2010	very fun crack me !

QHQCrker's QHQ crkmi no1

Download crkmeno1.zip, 202 kb (password: crackmes.de)
Browse contents of crkmeno1.zip

Serial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 08. Aug, 2004
Downloads: 1151

Rating

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Solutions

Solution by Oorja-HalT, published 19. aug, 2004; download (17 kb), password: crackmes.de or browse.

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QHQCrker's QPatchmi No2

Download QHQPatchmeNo1.zip, 2 kb (password: crackmes.de)
Browse contents of QHQPatchmeNo1.zip

So simple. Hope U fun with it...

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 27. Sep, 2004
Downloads: 5976

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by Immortal_One, published 20. aug, 2005; download (17 kb), password: crackmes.de or browse.

Immortal_One has rated this crackme as boring.

Solution by zombie8, published 13. oct, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by SB_Cracker, published 02. oct, 2004; download (5 kb), password: crackmes.de or browse.

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Solution by rapid_snail, published 02. oct, 2004; download (9 kb), password: crackmes.de or browse.

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Solution by malfunction, published 28. sep, 2004; download (4 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

r-Evolution 02. Sep 2010	Beated the IsDebuggerPresent() antidbg trick but can't beat the 2nd one!!! :( patching seems to be easy
Noteworthy 25. Apr 2011	MADE US SOMETHING GOOD OR I SHOOT U : ) Anyway, thank you.
Ra1ningSn0w 03. Jun 2013	Had a lot of fun patching this one. Very Good for beginners!
DZ Nerve 13. Dec 2013	There's one thing i want to add. Everyone who shared their solutions changed string "--> Patch this message to good message <--" with their own. But there's already branch with good message (start addr 0x00401069). So i used this way to display good message. P.S. There's one surprise in this branch if you want to try it.
puelo 10. Aug 2014	@DZ Nerve: Thanks for the comment. Because of that i looked deeper into it and it was quite interesting for a beginner like me. :)
edza 31. Oct, 07:16	I made a quick 20 minute walk-trough for this patchme. https://www.youtube.com/watch?v=L97YBcyfNqY I'm not the best at video editing, but the video has all the information you need if you are stuck. Short and to the point on how to beat this step by step. Very interesting crackme, had a lot of fun cracking it! :)

Qnix's krypto

Download krypto.tar.gz, 12 kb

It contains two binaries 32 and 64 bit use whichever you like they're both the same. Find the password if you can, beat the krypto :)

Difficulty: 4 - Needs special knowledge
Platform: Unix/linux etc.
Language: C/C++

Published: 11. Aug, 2013
Downloads: 197

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Solutions

Solution by s3Rious, published 05. sep, 2013; download (18 kb), password: crackmes.de or browse.

s3Rious has rated this crackme as quite nice.

Discussion and comments

Qnix's qcrk5

Download qcrk5.tgz, 196 kb

[No patching]

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 07. Mar, 2006
Downloads: 1274

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Solutions

Solution by pof_es, published 17. jan, 2008; download (8 kb), password: crackmes.de or browse.

pof_es has rated this crackme as quite nice.

Solution by _pNg, published 01. aug, 2006; download (67 kb), password: crackmes.de or browse.

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Solution by stefanie, published 01. jul, 2006; download (7 kb), password: crackmes.de or browse.

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Solution by clandestino, published 18. apr, 2006; download (635 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Qnix's Qcrk-1

Download qcrk.tgz, 3 kb

This is my first crackme at crackmes.de

info() :

- ELF 32-bit LSB executable
- Intel 80386
- version 1
- statically linked
- corrupted section header size
- Tricks you should find
- Some of Modefieded UPX Uses
- Wrong buffer size
- Bad key

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 18. Dec, 2005
Downloads: 654

Rating

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Solutions

Solution by taviso, published 06. jan, 2006; download (3 kb), password: crackmes.de or browse.

taviso has rated this crackme as boring.

Discussion and comments

taviso 03. Jan 2006	what do you mean by hijacking? just LD_PRELOAD'ing strcmp() away? this seems too easy...
macabre 30. Aug 2006	I noticed that the UPX version doesn't run (just exits) but if I snag the unpacked one it runs fine. Is that intentional?

Qnix's Qcrk-2

Download qcrk-2.tgz, 3 kb

This is a binary ELF crackme programmed in C for Linux
you should make the programe print CRACKED .

Rules : NO PATCHING .
HINT : BOF

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 10. Jan, 2006
Downloads: 636

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by macabre, published 30. aug, 2006; download (2 kb), password: crackmes.de or browse.

macabre has rated this crackme as quite nice.

Solution by stefanie, published 03. sep, 2006; download (3 kb), password: crackmes.de or browse.

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Solution by cyrex, published 12. jan, 2006; download (4 kb), password: crackmes.de or browse.

cyrex has rated this crackme as awesome.

Discussion and comments

cyrex 10. Jan 2006	how it should print CRACKED ? in overwriting the retn addr ? with the crap function ? and nice debug check :-)
cyrex 11. Jan 2006	Very Good crackme , im done with in like 3hours of reversing and testing :D
Qnix Author 11. Jan 2006	Good job cyrex .. :)

Qnix's Qcrk-3

Download qcrk3.tgz, 2 kb

Rules :-
NO PATCHING
NO HIJACKING

Make it print CRACKED ...

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 20. Jan, 2006
Downloads: 458

Rating

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Solutions

Solution by cyrex, published 23. jan, 2006; download (2 kb), password: crackmes.de or browse.

cyrex has rated this crackme as awesome.

Discussion and comments

cyrex 20. Jan 2006	good crackme , done it :D solution will be submit

Qnix's Qcrk-4

Download qcrk4.tgz, 2 kb

NO PATCHING ...
JUST CRACK (ed()) IT !!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 26. Feb, 2006
Downloads: 540

Rating

Waiting for at least 3 votes
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Solutions

Solution by lagalopex, published 06. may, 2007; download (2 kb), password: crackmes.de or browse.

lagalopex has rated this crackme as quite nice.

Discussion and comments

Qnix's timemachine

Download qvm32.gz, 7 kb

Understand what's going on and get the password :D

Difficulty: 5 - Professional problem to solve
Platform: Unix/linux etc.
Language: C/C++

Published: 20. Oct, 2013
Downloads: 264

Rating

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Solutions

Solution by rookie, published 22. jan, 2014; download (5 kb), password: crackmes.de or browse.

rookie has rated this crackme as quite nice.

Discussion and comments

andrewl.us Moderator 22. Jan 2014	rookie's solution is very good here - nice walk-thru format - uses newer tools - finds password different than the one supplied by crackme author (author's mistake? LOLVMCODELOL doesn't work) - method is able to ignore lower level structure and challenges that the author intended
s3Rious 22. Jan 2014	Very nice solution rookie!
rookie 22. Jan 2014	Sorry Qnix, I skipped/missed your LLVM implementation completely. I only realized the documentation on your homepage after I wrote the solution. Made it a lot it easier this way though ;)
Qnix Author 29. Jan 2014	Congrats rookie, very nice solution!

qpt^J's Crackme2

Download Crackme2.zip, 9 kb (password: crackmes.de)
Browse contents of Crackme2.zip

For this crackme you must find Serial number
Patch isn't allowed

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 22. Aug, 2009
Downloads: 489

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by mjones, published 24. aug, 2009; download (8 kb), password: crackmes.de or browse.

mjones has rated this crackme as awesome.

Discussion and comments

kstangl 23. Aug 2009	Is there any way other than brute force to solve for the first part of the key?
qpt^J Author 23. Aug 2009	This crackme can be solved only by bruteforcing
Lone.Wolf 24. Aug 2009	Wow, this crackme is a hard one (for me) by implementing the function at $4012BA i figured (brute forced) out the string format: - 18 characters long - 4th and 10th character must be "-" e.g: 123-12345-12345678 that function almost equals to this equation: ( SQR( ( SQR(x) * 4 + 9x + $746 ) div 5 ) 2 + 4 * ( ( SQR(x) * 4 + 9*x + $746 ) div 5 ) + $153F - $15F1F ) div 4 + $5A2D9 - $BBD59 EXCEPT for 1 iteration (ebx = 1) I hope someone could dig deeper .. xD Best regards
qpt^J Author 24. Aug 2009	mjones very nice solution
Lone.Wolf 24. Aug 2009	wow, im impressed; i thought about analyzing the function and solving the equation for key/serial creation, but bruteforcing also leads to victory xD thanks
Torpor 25. Aug 2009	You can analyze the function, but not realistically reverse it. The hash method is: a = (4aa + 9a + 1862) / 5; a = (2aa + 4a - 84448) / 4; a -= 400000; (the use of IDIV should mean the number is signed, however, the program operates on the unsigned number for me -- so if you use the above, declare "a" as unsigned.) The problem with trying to reverse the hash is the use of integer division. The inverse is not a function -- it maps many-to-one. i.e.: int(6/5) = int(7/5) = int(8/5) = int(9/5) = 1 (in fact, with x/n, there are n-1 values for x that are equivalent). So without the knowing the modulus result, each loop has (5-1)(4-1) = 12 possibilities. The calculation of the first three digits loops 0x1C4 (452) times. Thus, Reversal: 452 * 12 = 5,424 possible solutions. Brute Force: 10^3 = 1,000 possible solutions. In the end reversing the algorithm is basically a less efficient version of brute force.
ringzro 10. Sep 2009	I may be wrong, but I think LoneWolf's equation could be brought to a 2nd grade equation of the form ay^2 + by + c = 0; where y equals to (4 * sqr(x) + 9 * x + 746) / 5; For each y found, solve the equation of x. So you end up with at most 4 values for x, some of which may be negative or complex. Of course, as x is the length of the code, it can only be a positive number. For ebx > 1, you can still solve it by repeatedly propagating the result for the nth step to the nth-1 step.

qpt^J's KeyGenMe 1

Download KeyGenMe.zip, 14 kb (password: crackmes.de)
Browse contents of KeyGenMe.zip

Rules are:
No Patching,Key-Fishing,SelfGening
Only Fully working KeyGen is a valid solution

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 14. Sep, 2009
Downloads: 546

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by alex_ls, published 17. mar, 2010; download (65 kb), password: crackmes.de or browse.

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Solution by KernelJ, published 17. mar, 2010; download (20 kb), password: crackmes.de or browse.

KernelJ has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

cobrasniper555 02. Nov 2009	Well, I have been able to reverse the algorithm for the second part of the serial but the first 7 bytes are the tricky part. They are put through a StrToInt function and xor'd by 5050h. This result is an address that is followed after lstrcmp returns positive. Without the correct first 7 bytes, the program fails. Help?
mazuki 18. Nov 2009	i didn't find any variable pushes to the stack for message boxes either, and there are only 4 wsprintfa calls, none of which have variable pointers, so no way to really modify those with a unique or crafty jump the only way i found was to patch the invalid serial number box so that it reports the 40C07E string instead
qpt^J Author 18. Nov 2009	mazuki, like cobrasniper555 said, >>the first 7 bytes are the tricky part. They are put through a StrToInt function and xor'd by 5050h. then it's converting to an address which must be goodboy message address, and not need to patch the program
_ghandi_ 05. Mar 2010	Looking at the lstrcat at 00401116, there is an element of randomness as you have saved the ESP value to 0041C385. As the address is stored little endian, it is included in the string added to the entered name. Havent reversed it any further yet so i dont know how or even if this influences anything.
KernelJ 09. Mar 2010	As _ghandi_ pointed out, the current value of ESP (and other junk on the stack in fact) is included in the serial calculation mechanism. Changing the ESP at the program entry point (the OS doesn't have to give you the same one) gives you completely different valid serial, meaning it's impossible to write a proper keygen for this, the only solution is to fish for the serial or copy the code so that you get the same behaviour. Basically you have to self-keygen it, there's no other way worth mentioning. Finding the first 7 bytes was slightly enjoyable with analysis tools, but only because the chain of instructions was fairly short and could be traced back easily. Very poorly written keygenme in general... I've submitted a tutorial on how to reverse the required parts of this, find the first bytes, and selfkeygen.
qpt^J Author 09. Mar 2010	thanks KernelJ for solving this shit. I knew that serials could be different in each computer. Maybe I will agree with selfkeygen, because there is no way to write keygen. p.s: this is my first keygenme, thats why it has a stupid protection
alex_ls 10. Mar 2010	gpt^J Would be nice crackme but this an unfortunate bug! I have patched a few bytes into SHA1 modified function (just put 0 to address 41c385) and created a keygen which works for every name. Very liked the obfuscated part of code :)

qpt^J's KeyGenMe 3

Download keygenme3.zip, 184 kb (password: crackmes.de)
Browse contents of keygenme3.zip

KeyGenMe is for CrypToKeyGeNeRs and/or CrypToLoVeRs

-----------------------****Rulz****------------------------
No Patching,No BruteForcing
For Newbies lvl(3/10): Find a valid keys 4 your name
For Normal crackers lvl(4/10): Write a keygen 4 only 1 Activation key
For Professionals lvl(5/10): Make a Full working Keygen (with random values generation)
Full working Keygen is preferred :P
----------------------------------------------------------------

I hope you enjoy it :p
Happy keygening & thanks for attention

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 25. Nov, 2009
Downloads: 768

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by Diabolito, published 11. nov, 2010; download (151 kb), password: crackmes.de or browse.

Diabolito has rated this crackme as quite nice.

Discussion and comments

c0nfig 25. Nov 2009	Need help :) SomeAlgo(AuthKey)=AuthHash SomeAlgo(ActivKey)=ActivHash if ActivHash=MyActivHash and AuthHash=MyAuthHash then Goodboy; But some problems:) Is 93C64631289064F9 static hash?
c0nfig 25. Nov 2009	AuthHash of 111 = F08E534BBF52BCE4 ActivHash of 111 = 93C64631289064F9 Damn :D
BoRoV 25. Nov 2009	in keygenme: 00408976 . 68 24004100 PUSH OFFSET <SHA1Digest> 0040897B . 6A 14 PUSH 14 0040897D . E8 0AF6FFFF CALL <HAVALInit> in sources HAVAL: HavalInit proc uses esi edi DigestSizeBits:dword,Passes:dword mov eax,Passes mov edx,DigestSizeBits mov HavalPASS,eax ... HavalFinal proc uses esi edi ebx ... mov eax,HavalSIZE shl eax,6 mov edx,HavalPASS shl edx,3 or eax,HavalVERSION or eax,edx <-- or ..., address of SHA1Digest ... you init HavalPASS by the address of SHA1Digest, and for wrote correct keygen address of SHA1Digest must be equal your address
qpt^J Author 26. Nov 2009	@c0nfig 93C64631289064F9 is just a constant for initialazing that SomeAlgo's :p @BoRoV use SHA1Digest address like a constant and change some things in haval for right generation
BoRoV 26. Nov 2009	I did so, it remains _BigPowMod, and I've seen him somewhere with the same constants ;)
stejar 29. Nov 2009	Guys, sorry, i am just a beginner, and i am happy that i found this: 00408A82: 75 -> 90 (offset 7E82h) 00408A83: 14 -> 90 (offset 7E83h)
BLODYALBO 20. Jan 2010	I Have this Name:orhan ??? Key:Blodyalbo Activation Key:???? 0012FB04 0040FF30 \|Arg1 = 0040FF30 ASCII "2EB372D0845E967B" 0012FB04 0040FED0 \|Arg1 = 0040FED0 ASCII "D0270A10E8D350FE" 0012FB04 0040FB6C \|Arg1 = 0040FB6C ASCII "E004CE9646CAC41E" Can one tell me if the serial number are correct ???
hound 17. May 2010	All solved. Pretty fun, though a bit tedious to implement =). Name: hound Authorisation Key: al2KwFZBAXE= Activation Key: DerE/AAc+ew= Name: crackmes.de Authorisation Key: 1u9/Z+ndZ2s= Activation Key: lAvs1DPWLNs= Will write up a solution =).

qpt^J's Keygenme 6

Download keygenme.zip, 68 kb (password: crackmes.de)
Browse contents of keygenme.zip

Hello, this is my 6th keygenme

keygenme includes crypto

rules: Acceptable solution is only keygen
Good luck!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 03. May, 2010
Downloads: 558

Rating

Votes: 5
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by hound, published 13. may, 2010; download (82 kb), password: crackmes.de or browse.

hound has rated this crackme as awesome.

Discussion and comments

KKR_WE_RULE 03. May 2010	Hmm.. Appears to be ECC.. Will try to solve.. :)
qpt^J Author 04. May 2010	Yea, man, you got it Good luck in solving :)
Xspider 05. May 2010	why KANAL doesn't find it find just CRC32!!
qpt^J Author 06. May 2010	Kanal wont help you too much. You need to apply IDA signatures for miracl
KKR_WE_RULE 06. May 2010	I used Olly to figure out what it was. I kinda suck with IDA :p But as my luck would have it, till that day, I've not got a single spare hour to try to solve it :( I guess I'll have to wait for the week end :)
KKR_WE_RULE 06. May 2010	Ok.. I got 5 mins & was looking at the routine. Chksum of name, check serial for $2D & after this suddenly the kgm terminated. is it any Anti-debugging crap or is it my crappy netbook ?
qpt^J Author 06. May 2010	There is no antidbg tricks. Maybe your input or serial base is invalid
Numernia Moderator 06. May 2010	this keygenme is extremely straightforward. its nice to not have to deal with FGint though...
KKR_WE_RULE 06. May 2010	Yea, as far as my reading goes, it genning is actually signing. Key = Sign(Crc(name)). May be there are other custom hashes used, but didn't did that deep yet. I am running short of time :(
qpt^J Author 06. May 2010	I dont used any hashing in keygenme. only crc checksum Keygenme dont have any obfuscations and tricks. Just a simple keygenme :) You need only to understand whats going on in it, and you can easily keygen it Good luck :p
KKR_WE_RULE 06. May 2010	yea, thats why why i said 'Maybe'. Good 2 hear that there arn't any other than crc32. Then thats the way to gen it :) I'll try to submit a soln, of I get time :)
hound 11. May 2010	So far I have the problem defined as: s1 = first section of serial. s2 = second section of serial. c = CRC32 of name. s2_inv = inverse of s2 (mod 398B47BC33879) r1 = (c * s2_inv) (mod 398B47BC33879) r2 = (s1 * s2_inv) (mod 398B47BC33879) P1 and P2 are defined points on an elliptic curve. P3 = r1P1 + r2P2. Serial is valid if the x-coordinate of P3 is equal to s1. However, I am now in a bit of a pickle on how to actually find a solution to this. Any suggestions :( ?
cyclops Moderator 11. May 2010	You know its ECC, and from the two parts of the serial, you can deduce it as some kind of signature scheme. Try to find some basic ECC signature schemes ;)
hound 11. May 2010	Thanks cyclops! Those last little keywords have brought up a wealth of information on google. I had a basic understanding of ECC and how to solve the DLP using the baby-step giant-step algorithm, but that is about it. Cheers!
hound 11. May 2010	Wow. Turns out the first ECC signature algorithm I stumble upon is exactly what I need ;). I hadn't looked at signature schemes over EC fields before, so this has definitely been a helpful crackme in terms of learning! Will definitely write up a solution.
hound 11. May 2010	Hmm I think I spoke to soon. As KKR_WE_RULE said, the solution to this is the signing process (for ECDSA). However, won't this require recovering the signing key s, where it is defined: P2 = s*P1? I.e. solving the DLP ...?
hound 11. May 2010	Finally solved. This has been a very nice introduction into ECDSA, as "simple" as it is :).
qpt^J Author 11. May 2010	wow, I don't think that this keygenme will be so interesting for people :) thanks for solving, hound, hope you enjoyed it ;)
Xspider 11. May 2010	@gpt^J: why it is not O_o anyway it is SO interesting for me :D @hound: waiting ya solution!
Coderess 13. May 2010	Awesome keygenme :)
Xspider 13. May 2010	thank's mate for ya solution :D
andrewl.us Moderator 13. May 2010	well done, hound! :) congrats
qpt^J Author 14. May 2010	thanks for nice solution, hound ;)
tamaroth Moderator 13. Jan 2011	I decided it's about time to get my head around ECC, so I grabbed this crackme and tried to crack it. But for some reason my code is unable to generate the proper values and i do not know why: 1. crc of the name is correct 2. private key i found was exactly the same as the one in the solution (although slightly different job file) 3. i implemented an ECDSA verification in C++ with your curve parameters, and for my numbers everything's verified, but it still doesn't work with your kgme. The only difference i noticed was the usage of divide in my code (that's how i found it in papers, wiki and in miracl sources) Any tips? if you want/need i can show you my code, just let me know ;p
qpt^J Author 13. Jan 2011	the miracl lib, which i've used in it, was from some old versions, wheres some bugs in ecc functions. I noticed this only when i've used same lib in making keygen for one commercial software. And maybe you're using old version too? so it's not your fault ;)
qpt^J Author 13. Jan 2011	ah, and please pm me your code also :)
tamaroth Moderator 13. Jan 2011	Code is basically ripped from miracl, using 5.2 if i remember correctly. I'll drop you the code tommorow :)
KKR_WE_RULE 15. Jan 2011	Why this kgm made my life difficult ? Well here is why : 1) Miracl Library : When I saw function names like 'mad' , I was like - "Are these Shamus guys nuts ??" then thanks to documentation I was able to go through royal Shamus crap :) 2) ECDLP : I made a job file for kgm & & used Mr.Haandi's Creation. But what the heck, it was running for eternity.My fault i mistyped the 'a' param. But after rectifying that, I got the K(private key) = 0 . Now I was like, wtf!! Then on experimenting a bit, with the job file & then a half an hour intermission of a film that qpt was watching yesterday, he was talking to me. He solv'd the ecdlp using my job file. Then I realised that the factor count was creating the prob. Infact there are two factors : '5' & another big one. but when the factor count is 2 & the '5' is included in the factor, private key is 0. But if the factor count was & 5 was excluded from the factor list, we get a private key . I still dont understand why!! Now writing the gen was not the prob.. Wrote a genner in less than 5 mins & amazingly to my surprise, it works!! If some one takes some pain in explaining the factor problem, I'll be greatful to him :) Regards KKR
tamaroth Moderator 15. Jan 2011	I was using Mr. Haandi's ECDLP solver 0.2 with this job file: GF := GF(1012325832444403); E := EllipticCurve([GF\|-3,876059939881460]); G := E![472617234852198,294947133781418]; K := E![563102923360204,103148785834121]; /* FactorCount:=2; 5; 202465173611749; / This took just couple of seconds on my machine, result is this: Elliptic Curve defined by y^2 = x^3 + -3x + 876059939881460 over GF(1012325832444403) kG=K G=[472617234852198,294947133781418] K=[563102923360204,103148785834121] Order(K)=5202465173611749 Initializing rho solver k*G=K G=[530546720178592,121972385715163] K=[36345436447195,851565637956894] Starting thread 0 Starting thread 1 Starting thread 2 Starting thread 3 Time for 10000000 steps: 936 Time 1310ms; Steps: 14791488; Points: 883 k=134338524339855 Found k=741734045175102; time=1326ms So on my end everything works as it should. qpt^J: i've send you link to my code via pm ;-)
KKR_WE_RULE 16. Jan 2011	Dunno whats wrong with my machine. Job that gave k = 0; GF := GF(1012325832444403); E := EllipticCurve([GF\|-3,876059939881460]); G := E![472617234852198,294947133781418]; K := E![563102923360204,103148785834121]; /* FactorCount:=2; 5; 1012325868058745; / Now Change Factor count to 1 & remove the '5' from the factor list. Now k = 741734045175102; Here is the job which gives k = 741734045175102; GF := GF(1012325832444403); E := EllipticCurve([GF\|-3,876059939881460]); G := E![472617234852198,294947133781418]; K := E![563102923360204,103148785834121]; / FactorCount:=1; 1012325868058745; */ Can any1 explain the reason for this ?
andrewl.us Moderator 16. Jan 2011	KKR: check your curve order factors sage: E=EllipticCurve(GF(1012325832444403),[0,0,0,-3,876059939881460]) sage: E.order() 1012325868058745 sage: factor(1012325868058745) 5 * 202465173611749
tamaroth Moderator 16. Jan 2011	OK, i have solved it finally. tamaroth 379897EA7254B-37ED198B7FF3C I've learned quite a lot about ECC and ECDSA while having trouble with this particular crackme. I'm still not quite sure what was wrong previously, because i have spend a lot of time modifying my code and i don't really know what was wrong back then, but now it's working. Thanks a lot for this awesome introduction into ECC ;-) (and you hound too for guidance with your code and solution)
KKR_WE_RULE 17. Jan 2011	hehe, congratz tamaroth :) Now give HappyTown26 a try :)

qpt^J's Keygenme 7

Download kgm7.zip, 8 kb (password: crackmes.de)
Browse contents of kgm7.zip

Rules:
No patching, No bruteforcing..
The only real solution is keygen and tut, if you have enough time :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 01. Nov, 2010
Downloads: 536

Rating

Votes: 5
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by |sas0|, published 14. nov, 2010; download (22 kb), password: crackmes.de or browse.

|sas0| has rated this crackme as quite nice.

Discussion and comments

Xspider 01. Nov 2010	ouh nice to see some new crackmes from you mate :)
andrewl.us Moderator 01. Nov 2010	jeez that was fast xspider - approved like 3 seconds ago wtf
qpt^J Author 02. Nov 2010	thx xspider, and waiting for your keygen andrewl ;)
KKR_WE_RULE 02. Nov 2010	Hey..Hey..Hey..Hey :D Gonna try :D Somehow my IM is totally fucked up & didn't talk to ya for ages :( Nice to see ya posting some challenges :D
KKR_WE_RULE 02. Nov 2010	erppp... I see some pretty crappy asm code in there :p Hehe gonna be fun..it appears :D You just spoiled a new project of mine with this kgm lol :D
KKR_WE_RULE 02. Nov 2010	hmm... It may appear that I am spamming :p but here is the prob :p a bunch of ret in the middle of events is driving me nuts :p Ya unleashed the power of asm on me :D
qpt^J Author 02. Nov 2010	well, that's just non-standart calls ;) keep going mate :p
KKR_WE_RULE 02. Nov 2010	yeap.. remembered ya gr8 speech by asm expert qpt^J :D asm obfuscations :D
qpt^J Author 02. Nov 2010	lol :D ok, what did you figured out so far? :) btw, too bad that, your IM is fucked up, so open xchat and come to efnet and lets not spam here ;)
KKR_WE_RULE 02. Nov 2010	lol..hehe.. I am fucked up both ways.. on ups atm.. Royal Power cut :D
tamaroth Moderator 04. Nov 2010	tamaroth Q6R7JU-GJHP1D-Y9JYTW-1YWXCZ-JY3R00 qpt^J AA973U-9XA4V4-1HGTY0-HLD890-F1C890 crackmes.de HUWKUX-M5ALG5-FQHTZJ-42RNQQ-YPQP01 Once i find some time, i'll drop a tutorial. Crackme was quite nice, had like two 'facepalm' moments when i didn't notice obvious things :>
qpt^J Author 04. Nov 2010	nice work, tamaroth, waiting for tutorial :)
\|sas0\| 11. Nov 2010	\|sas0\| 1DJU44-5AF98C-L8N5PH-DJ4AY0-YW0000 Realy nice piece of code, solution is on the way
mre521 20. Dec 2010	all i got is the serial format and that it replaces some chars, it is obfuscated as fck... add eax,DEADBEEF..sub eax,DEADBEEF.... sub eax,eax....

qpt^J's Keygenme 8

Download keygenme8.zip, 4 kb (password: crackmes.de)
Browse contents of keygenme8.zip

Hello everybody,

Here's a new challenge from me.
No obfuscation tricks this time, though code is a bit virtualized.
The algo inside vm, is more harder, than vm itself.

so the rules are.
1)No patching
2)No any sort of bruteforcing
3)Keygen only

enjoy! :)

btw, this crackme is tested only on WinXP SP2, but i guess it should work fine for any WinX system

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Assembler

Published: 21. Feb, 2011
Downloads: 512

Rating

Votes: 6
Crackme is good.

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Solutions

Solution by gim913, published 23. mar, 2011; download (82 kb), password: crackmes.de or browse.

gim913 has rated this crackme as quite nice.

Solution by Vallani, published 04. mar, 2011; download (756 kb), password: crackmes.de or browse.

Vallani has rated this crackme as awesome.

Discussion and comments

Xspider 24. Feb 2011	love it "The algo inside vm, is more harder, than vm itself" x)
Xspider 24. Feb 2011	it seems a long road algo :)
qpt^J Author 24. Feb 2011	algo isn't that long, but it would take a while to reverse it :)
Xspider 24. Feb 2011	tell me about it :p
KKR_WE_RULE 25. Feb 2011	lmao :p Tell him bro ! hehe
Vallani 28. Feb 2011	Vallani: 22A7D60FB3C02E6E Thank you for this KeyGenMe qpt^J! I really enjoyed reversing it. Hope I find tomorrow(which means today afternoon :) ) or tuesday some time to write a solution.
qpt^J Author 28. Feb 2011	nice work, Vallani :) looks like i knew that you'll do it :P and looking forward for solution :)
KKR_WE_RULE 28. Feb 2011	Hey C00L work there :) I am in exams atm & hence cant do anything. Can you make a detailed tut about VM, coz I've never work'd on VMs' & would love to learn about it :) & qpt^J : I am really missing chatting with ya :P Best Regards KKR
Xspider 28. Feb 2011	ouh good work val looking for a solution :p
cyclops Moderator 02. Mar 2011	This is a fun crackme. Perfect place to use tracing functionality of olly ;)
gim913 05. Mar 2011	I've just noticed I got a bit late, but I've sent it anyway
hasherezade 06. Mar 2011	qpt^J, thanks for this nice crackme, and Vallani - thanks for detailed solution ^^ I learned a lot from it! Good job, guys!
blzbb 15. Mar 2011	nice keygenme, very learnable thanks qpt^J
N1ghtm4r3 16. Mar 2011	Awesome one, keep it on qpt^J ;)
心如止境 23. Apr 2012	download learning，thank qpt^J！

qpt^J's Keygenme N4

Download Keygneme_N4.zip, 230 kb (password: crackmes.de)
Browse contents of Keygneme_N4.zip

This is my first program, that I ever coded in Delphi, but isn't very easy
level is 3/10 or 4/10 - imho
Rules
No patching, No bruteforcing, ect
Write a keygen or fish serial 4 your name

MODERATE NOTE: no fishing solutions, please

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 13. Jan, 2010
Downloads: 573

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Encrypto, published 04. nov, 2010; download (168 kb), password: crackmes.de or browse.

Encrypto has rated this crackme as quite nice.

Discussion and comments

qpt^J Author 04. Nov 2010	nice work Encrypto :)
Encrypto 04. Nov 2010	:) I liked it. Good to flex the brain

qpt^J's qpt^J's Crackme

Download Crackme.zip, 9 kb (password: crackmes.de)
Browse contents of Crackme.zip

There is no rules:
make a patch,keygen,or find a write serial number with Activation code

MODERATOR NOTE: keygen preferred :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 28. Jul, 2009
Downloads: 707

Rating

Votes: 7
Crackme is quite nice.

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Solutions

Solution by DoomsDay, published 03. aug, 2009; download (2 kb), password: crackmes.de or browse.

DoomsDay has rated this crackme as awesome.

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Discussion and comments

kilobyte.asm 28. Jul 2009	nice scheme, is it really for newbies :P
qpt^J Author 28. Jul 2009	I think no,I choozed a Difficulty 4/10
HackerVirus_90 29. Jul 2009	sorry, but if i write active code and i push check button, the software crashed..sorry for my bad english..
obnoxious 29. Jul 2009	he he definitely not a lvl 2. :)
qpt^J Author 29. Jul 2009	So,that is a wrong activation code.This Crackme isn't so easy P.S. sorry for my bad english too :)
BoRoV 29. Jul 2009	and what I must see when all good? P.S. sorry for my bad english too :)))
HackerVirus_90 29. Jul 2009	i think my activation code is correctly but i don't know if it is correct, call a messagebox or good message??!! :)
qpt^J Author 30. Jul 2009	BoRoV You must see there Message "Write Serial" HackerVirus 90 your activation code isn't correct but you make a patch,because you can't find write serial number with its algorithm
cobrasniper555 30. Jul 2009	So far, I've got an activation code that has every 8th byte that'll pass the first check routine. However, you've included a nice routine that uncovers another procedure via polymorphism. I like these routines because they're hard but I also don't like them because of their tendencies to be bruteforced for a valid solution. I'm sorry but I think I'm going to call it quits on this one.
kilobyte.asm 30. Jul 2009	this should help -> http://ref.x86asm.net/coder32.html, if you're looking for opcodes
obnoxious 30. Jul 2009	it will be big time bruteforcing or a very very very good guessing session :)
qpt^J Author 30. Jul 2009	obnoxious algorith for serial is very very very simple :)
kilobyte.asm 30. Jul 2009	no need for bruteforcing....just very good guessing session, i wouldn't call it guessing if you look through the code you can make some educated guess as to what sequences go where anyways just a hint :/ that are two functions that are never called, and i believe one of them is the serial checking routine. If you look at the activation string it starts and ends with a 6, so we can assume that it is a pushad/popad, just use careful analysis and educated guesses. look out for push/pops and conditional jumps etc.
kilobyte.asm 30. Jul 2009	one more hint, won't reveal too much, just how you should think about things. Think about how the serial checking routine would go. GetDlgItemTextA, checks etc, call calculate serial, lstrcmp (Already imported), goodboy,badboy etc, cleanup, exit. Don't assume that code is aligned. hopefully this is help and i haven't given incorrect hints :/ :P.
kilobyte.asm 30. Jul 2009	take hints at own risk :P, i've just noticed some minor mistakes, anyways i'll stop talking now.
obnoxious 30. Jul 2009	have you finished it @kilobyte.asm i will wait for the tut then. :P
kilobyte.asm 30. Jul 2009	not yet, still at the edcuated guesses stage, will write if somebody doesn't and/or if somebody does but my methods are different.
qpt^J Author 30. Jul 2009	kilobyte.asm your method is write, just continue guessing
Vallani 30. Jul 2009	Hello qpt^J, maybe you are able and willingly to answer this simple question: Is there some umhh...hint in this CrackMe for the routine we are expected to restore, in addition to the first half byte of each dword and the included functions, which are seemingly not usedt?
Vallani 30. Jul 2009	Or is this designed as a opcode puzzle :) ?
cobrasniper555 30. Jul 2009	@kilobyte.asm, I know what you mean with the guessing part but you also misunderstood the bruteforcing part. Assuming the first dword or so of the procedure would be the correct way to finding the bytes that are supposed to be in the activation code. However, a bruteforcing method is what I thought I saw fit for finding the right characters in the activation code from the morphed code. Check out this crackme for a similar approach: http://crackmes.de/users/sharpe/unlockme_crackme_8_by_sharpe/
tamaroth Moderator 03. Aug 2009	Ok, so i've done some part of it. need to finish off the puzzle you left, though it's kind of hard to guess what you put there. Nevretheless you could put SEH just before it's execution to prevent crackme from crashing everytime i enter wrong serial. hopefully keygen and most importantly activation code soon :)

quaygod's crackme #1

Download qg_cm1.zip, 4 kb (password: crackmes.de)
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name/serial (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 02. Dec, 2000
Downloads: 2079

Rating

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Solutions

Solution by sonkite, published 21. jul, 2003; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

quequero's uic strainer

Download uicstrainer.zip, 6 kb (password: crackmes.de)
Browse contents of uicstrainer.zip

strainers are allways interesting:)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Apr, 2001
Downloads: 1183

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

quetz's q keygenme 1.0

Download q_keygenme_1_0.zip, 139 kb (password: crackmes.de)
Browse contents of q_keygenme_1_0.zip

Lately, protection from static analysis becomes more and more popular. Almost every protector employs some kind of obfuscation, virtual machine, etc... This keygenme is an attempt to show what happens if you abuse idea of obfuscation.
Can human effectively analyse such code? Maybe with an assistance of a tool?
For your testing -- 'testuser', '78648A5B4C7ABA06' is a valid user-serial pair.

Happy cracking.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 21. Dec, 2007
Downloads: 483

Rating

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Solutions

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Discussion and comments

IamTCM 01. Jan 2008	Congratulations. This program makes me want to kill myself.
hootydavis 25. Feb 2008	Thanks this is really good for a begginer, i finished in like 30mins:)
hound 25. Feb 2008	Hmm, going nuts doing this. Can selfkeygen it, but haven't looked into it too much further :\

qwertydid's qwertydid's KeygenMe1

Download KGM1-qwertydid.zip, 2 kb (password: crackmes.de)
Browse contents of KGM1-qwertydid.zip

KeygenMe1 by qwertydid
---------------------
Rules:
Make a working keygen. No patching, serial fishing or selfkeygenning.
When you've made the keygen, submit tutorial, source & binary to crackmes.de

Difficulty:
3/10 (depending on skills)

Language:
Assembly

Author:
qwertydid

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 28. Jan, 2008
Downloads: 422

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by cosmos, published 03. feb, 2008; download (80 kb), password: crackmes.de or browse.

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r00ster's CrackMe #01

Download cm001.zip, 2 kb (password: crackmes.de)
Browse contents of cm001.zip

This crackme is really easy, i had written it for those who are making their first steps in the world of reversing. Those are the rules:

1. Please, try to find a valid serial instead of cracking it

2. There is a "bug" in this crackme that will prevent good-boy message in a certain condition. You must discover it and explain how it works.

3. OPTIONAL: write a keygen

I hope you will have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 03. Apr, 2008
Downloads: 651

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by _HellDashX_, published 12. dec, 2008; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 04. Apr 2008	Found the valid serial for my name ;). Pretty easy algorithm. Also found the bug. Weird place to have a bug there. I think i know why it happens =).
r00ster Author 04. Apr 2008	Yeah, i think it was the easiest algorithm possible. As i said, it was just for starters, totally a no-match for seasoned reversers :-)
jvwarrior 10. Apr 2008	Hey I'm Nooby and have no clue how to disassemble this. Dot Net desnt work so I tryed Olly but I got no idea how to use it!!! AHHHH
r00ster Author 10. Apr 2008	@jvwarrior: yea, it isn't written in .NET, as you can see is in ASM. I suggest you to read some papers about Olly, using it isn't so difficult.
indivisible_int 12. Apr 2008	I think using IDA and Olly together will be useful
apuromafo 13. Apr 2008	im noob but i think that is done, Your solution to this crackme is being reviewed by moderators. but my english is basic sorry if are acepted..
indivisible_int 13. Apr 2008	my English is sorry too(heh-heh), but I can write it French or Russian :) Crackme is really simple, but it is good practice for keygenning
apuromafo 13. Apr 2008	Your solution to this crackme is being reviewed by moderators.
SlayerOtf 14. Apr 2008	i sent an solution, it past one day but no answer
apuromafo 14. Apr 2008	maybe wait more solutions for not copy xD
r00ster Author 22. Apr 2008	@indivisible_int: thanks for your appreciation ;-)

r00ster's CrackMe #02

Download CrackMe002.zip, 163 kb (password: crackmes.de)
Browse contents of CrackMe002.zip

Here's my second crackme, this time developed in .NET. I hope you'll find it interesting. Those are the rules:

1. Please, no patching
2. Find a valid serial
3. Write a keygen
4. Have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 09. Apr, 2008
Downloads: 620

Rating

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Solutions

Solution by MACH4, published 17. apr, 2008; download (928 kb), password: crackmes.de or browse.

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Send a message to r0m4n »

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Discussion and comments

saitob 09. Apr 2008	A very simple crackme, maybe not even a lvl 2 :-O I made a keygen in 2 mins max. A valid serial for the name 'Mjinhew' would be something like: 5430-156-377-61-*** (Hope I'm not breaking any rules now, if I am, please delete asap)
daZoe 09. Apr 2008	Yeah that was pretty simple. I'd say lvl 1. Did mine in about 10 mins.
r00ster Author 10. Apr 2008	Ok, i'm sorry to have overstimated my CM. Anyway, i hope you had fun ;-) @saitob: serial is not only related to the inserted username.
jvwarrior 10. Apr 2008	I dont get it....... Its so much files spread out! I cant find were it calculates the serial.
Brook 13. Apr 2008	Thanks for this Crackme which even I could solve :)
r00ster Author 22. Apr 2008	@Brook: good to hear that, i'm glad you found my CM useful :-)

r0m4n's crackme #1

Download roman_crackme1.zip, 114 kb (password: crackmes.de)
Browse contents of roman_crackme1.zip

name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Dec, 2000
Downloads: 2222

Rating

Waiting for at least 3 votes
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Solutions

Solution by Bytedevil, published 22. mar, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by snaik, published 02. dec, 2000; download (2 kb), password: crackmes.de or browse.

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Solution by sorvats, published 02. dec, 2000; download (5 kb), password: crackmes.de or browse.

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Solution by cameron, published 02. dec, 2000; download (23 kb), password: crackmes.de or browse.

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Solution by nitrus, published 02. dec, 2000; download (20 kb), password: crackmes.de or browse.

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R4v3N-THS's OGS-Registration

Download OGSystems_Registration.zip, 10 kb (password: crackmes.de)
Browse contents of OGSystems_Registration.zip

Asks for a registration key, figure out the algorithm and try to create a valid serial key.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 22. Apr, 2015
Downloads: 228

Rating

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Solutions

Solution by HoLLy_HaCKeR, published 09. feb, 2016; download (518 b), password: crackmes.de or browse.

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Solution by draww, published 23. apr, 2015; download (938 b), password: crackmes.de or browse.

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Discussion and comments

givses 07. Jul 2015	I cannot test the keygenme because of the darn FW 4.5 (XP)

R4v3N-THS's Tricky Registration

Download Tricky_Registration.zip, 10 kb (password: crackmes.de)
Browse contents of Tricky_Registration.zip

This program will ask you for a name and registration code. Your goal is to figure out the correct algorithm used for a successful combination. If you can write a keylogger once you figure it out!

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 22. Apr, 2015
Downloads: 209

Rating

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Solutions

Solution by PuN1sh3r, published 19. may, 2015; download (565 b), password: crackmes.de or browse.

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Solution by draww, published 23. apr, 2015; download (6 kb), password: crackmes.de or browse.

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Ra$cal's Ra$cal crackme N3 with vm

Download CrackMe_3.zip, 16 kb (password: crackmes.de)
Browse contents of CrackMe_3.zip

Crackme with simple vm. Key check algorithm is simple, so main target - vm.
difficult of pcode is growing from start to end. first part seems like emulator, but then it looks like like machine with another logic, registers, commands =)
Good luck and have fun.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 11. Jun, 2008
Downloads: 545

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by andrewl.us, published 20. jun, 2008; download (114 kb), password: crackmes.de or browse.

andrewl.us has rated this crackme as awesome.

Send a message to Raham2755 »

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Discussion and comments

costy 15. Jun 2008	After someone solve this... could you send me the source please??
obnoxious 15. Jun 2008	ye yes same here!!!!!!!!!!!!!!!!!!!
andrewl.us Moderator 15. Jun 2008	It is very difficult for me to solve. The instructions are variable length and many contain obfuscated operands. This appears true about all instructions, though: instr[00h..01h] == opcode instr[02h..05h] == jump label instr[06h] = size of instruction - 0Fh instr[07h..0Ah] == next instruction's jump label 07 00 is unconditional jump 02 00 is conditional 01 00 calls various functions 00407193: [01 00] 25 37 1F 41 08 F6 AD BA 05 00 00 00 00 !C3 C8 DA CE! 00 00 40 00 // kernel32!lstrlenA 00407236: [01 00] 9C 73 60 B7 08 30 F0 3C CE 00 00 00 00 !C3 C8 DA CE! 00 00 40 00 // kernel32!lstrlenA 004075FA: [01 00] A5 66 98 CF 08 10 23 0E 2F 00 00 00 00 !C0 C8 DA CE! 00 00 40 00 // kernel32!GetComputerNameA 0040BE60: [01 00] 8E E4 22 78 08 48 26 AA F2 00 00 00 00 !C6 C8 DA 8E! 00 00 40 00 // user32!SetDlgItemTextA 0040BF3A: [01 00] 81 1E C8 56 08 00 58 CF E4 00 00 00 00 !C7 C8 DA 8E! 00 00 40 00 // user32!SetDlgItemIntA 0040C031: [01 00] B0 56 11 29 08 60 1B 86 4C 00 00 00 00 !C6 C8 DA 4E! 00 00 40 00 // user32!MessageBoxA 0040737C: [01 00] C2 AA 49 45 08 3C CD 1E 5D 00 00 00 00 !C6 C8 DA 4E! 00 00 40 00 // user32!MessageBoxA The DWORD marked with !'s is obfuscated address of import thunk. There appears to be two context-like structures pointed to by pointers at at 405338h and 405340h: Context structure: +--------------------+ \| EFLAGS +--------------------+ <-- +20h \| EAX +--------------------+ <-- +1Ch \| ECX +--------------------+ <-- +18h \| EDX +--------------------+ <-- +14h \| EBX +--------------------+ <-- +10h \| ESP +--------------------+ <-- +0Ch \| EBP +--------------------+ <-- +08h \| ESI ? +--------------------+ <-- +04h \| ESI ? +--------------------+ <-- +00h Here is list of VM instructions and addresses: http://andrewl.us/rascalvm/all_instrs.txt Here is diagram of VM instruction flow for when incorrect serial is entered: http://andrewl.us/rascalvm/full_trace.txt Maybe someone can use these to get further than I can.
Ra$cal Author 16. Jun 2008	andrewl.us - very good =)
Ra$cal Author 24. Dec 2008	http://rapidshare.com/files/176473964/blabla.rar.html sources. but with russian comments.
cryostat13 04. Jul 2013	please reupload source code
andrewl.us Moderator 09. Jul 2013	http://andrewl.dreamhosters.com/crackmes/ra$cal_VM_N3_src.rar
cryostat13 11. Jul 2013	thanks andrewl.us

Raham2755's Sepanta 1170 Number 2

Download Sepanta_2.zip, 7 kb (password: crackmes.de)
Browse contents of Sepanta_2.zip

Hi My Dear Friend
This is my number 2 Crack Me for here
im working on a protction system
In this version:
i compiled it to PCODE
there is some Special Cryptography Method(Easy Level)
please crack this version of my crack me
and at end of it please give me a rank

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 05. Dec, 2009
Downloads: 275

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Solution by tinqnpro, published 04. nov, 2012; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

ShadowOfDeath 29. Mar 2012	OllyDbg gave me a error when i try to run this ..
crackamania 05. Apr 2012	Use OllyAdvanced plugin for disable IsDebuggerPresent.
cyberdog 07. Apr 2012	1 h into it and learnt the VB asm and structures first time ... thanks ... Found the correct and wrong msg box and some thread creation and timer, but kindda stuck now on where to look as I can't trace how the correct gets called back in VB (no ref to it)
cyberdog 08. Apr 2012	patch offset E05A from 75 to 74 and the IsDebugger Check is inverted letting you analyse under IDA and Olly with no additional plugin.
darklanx 01. May 2012	what's this...
d0d0 28. May 2012	how can i learn cracking from a to e ?
mobius 01. Aug 2012	You don't have to run a plug in, just rename OllyDBG to Oll or Olly or anything else. In addition, there does not appear to be a IsDebugerPresent call, only a NtQueryInformationProcess, which performs the same function at offset 5b348 from the module base of ntdll. Cyberdog, that offset means nothing because you don't explain what it's offset from. I can't fucking figure it out and it's getting really fucking irritating, so just attach to the fucker after you run it :p
mausy131 04. Nov 2012	Finaly a solution!
rantasipi Author 18. Mar 2013	good job, tinqnpro!

rascal's keygenme#1

Download raskgme1.zip, 25 kb (password: crackmes.de)
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name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 04. Nov, 2001
Downloads: 2040

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Solutions

Solution by roy, published 04. nov, 2001; download (52 kb), password: crackmes.de or browse.

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Solution by the+q, published 04. nov, 2001; download (100 kb), password: crackmes.de or browse.

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Send a message to Rascal999 »

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Rascal999's Rascal999's crackme challenge! [Cryptography]

Download encrypt.tar.gz, 19 kb

Your challenge is to decrypt the crackme file using anything you want. I have provided the file used to encrypt/decrypt messages.

You can reverse-engineer the program if you want.

Good luck and read the notes in readme.txt

-Rascal999

Difficulty: 7 - Very hard
Platform: Unix/linux etc.
Language: Unspecified/other

Published: 09. Jun, 2008
Downloads: 412

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Rascal999's Rascal999's crackme challenge! [Cryptography] #2

Download Archive.zip, 43 kb (password: crackmes.de)
Browse contents of Archive.zip

Difficulty: 7 - Very hard
Platform: Multiplatform
Language: Unspecified/other

Published: 06. Jul, 2008
Downloads: 275

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Rascal999's Rascal999's crackme serial challenge!

Download serial.tar.gz, 15 kb

Your challenge is to find a valid serial.

You can reverse-engineer the program if you want.

Good luck and read the notes in readme.txt

-Rascal999

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Unspecified/other

Published: 11. Jun, 2008
Downloads: 389

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Solutions

Solution by Yoha, published 14. feb, 2013; download (88 kb), password: crackmes.de or browse.

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Discussion and comments

stefanie 18. Oct 2008	ok, so i'm curious.. i haven't downloaded the crackme (nor took the liberty of disassembling it) yet... but the sheer number of downloads (93 at this time of writing) to solutions is rather staggering.
Rascal999 Author 24. Oct 2008	I believe someone has cracked this one, but only emailed me. My other serial crackme has not been broken ;) I guess people download it, get bored? :D

Rascal999's Rascal999's crackme serial challenge! #2

Download Archive.zip, 30 kb (password: crackmes.de)
Browse contents of Archive.zip

Your challenge is to find a valid serial.

Your extra challenge is to make a serial gen.

You can reverse-engineer the program if you want.

Good luck and read the notes in readme.txt

-Rascal999

Difficulty: 3 - Getting harder
Platform: Multiplatform
Language: Unspecified/other

Published: 22. Jul, 2008
Downloads: 301

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Rascal999's Rascal999's [windows] crackme challenge! [Cryptography]

Download encrypt.zip, 23 kb (password: crackmes.de)
Browse contents of encrypt.zip

Difficulty: 7 - Very hard
Platform: Windows
Language: Unspecified/other

Published: 11. Jun, 2008
Downloads: 340

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Solutions

Solution by MR.HAANDI, published 10. jul, 2012; download (64 kb), password: crackmes.de or browse.

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Discussion and comments

zart 13. Jun 2008	For anyone who may have been confused, the encryption routine in the provided program doesn't read a file, it reads whatever you enter on the "Type>" line - then encrypts it with your two keys and saves it to a file. Might be a little confusing for ESL people since it wasn't listed in ReadMe :)
Rascal999 Author 13. Jun 2008	woops, I'll make sure to fully document my crackmes in future. Thanks zart
MR.HAANDI 07. Jul 2012	After 1049 days trying nearly 10^18 key combinations the computing cluster got the result: pass1 = 756384985 pass2 = 999345234 Congratulations on cracking my encryption. I bet you brute forced ;P As you may have determined pass1 was 756384985 and pass2 was 999345234... Just kidding, simple meet in the middle attack with about 2^32 iterations. Fun as a riddle, but the algorithm is weak using less than 3 passwords.
Rascal999 Author 07. Jul 2012	Wow, you have me at a loss for words ;) how long did it take? With a MITM attack, did you just use one password or..?
MR.HAANDI 08. Jul 2012	With some probable assumptions it takes ~ 184 seconds on my machine to find a password pair. I have submitted my solution, so the details about the attack are explained there.
Dcoder 10. Jul 2012	The description is simpler if you recognize the LCG is only used as the seed for Mersenne Twister.

Rascal999's Rascal999's [windows] crackme serial challenge!

Download serial.zip, 17 kb (password: crackmes.de)
Browse contents of serial.zip

Your challenge is to find a valid serial.

You can reverse-engineer the program if you want.

Good luck and read the notes in readme.txt

-Rascal999

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 11. Jun, 2008
Downloads: 363

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Solutions

Solution by DigitalAcid, published 16. jun, 2008; download (4 kb), password: crackmes.de or browse.

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antisec 15. Oct 2007	anyone working on this ?
ratsoul Author 16. Oct 2007	any feedback? questions?
DigitalAcid 16. Oct 2007	I looked at it a bit and left it. Trying some more now, looks interesting since we aren't allowed to patch =)...
noah 24. Oct 2007	interesting indeed... spent some time finding out the input format of the serial. Looks like some sort of command string that does some operations with a buffer, but i on the first sight it looks rather complicated. Guess it takes a lot time finding out what's the exact purpose of every operator. Maybe there's a trick... any hints?
ratsoul Author 25. Oct 2007	Think about a puzzle...
noah 29. Oct 2007	is somebody else still working on this?
Zaphod 30. Oct 2007	I'm working on it but I think it is a tough job. There is SO much code to analyze...
noah 30. Oct 2007	You're right. But there must be some other way but to analyize hundreds of MOVs to a buffer... As ratsoul said, think about a puzzle, but i really don't get the idea. what's your opinion ratsoul?
ratsoul Author 30. Oct 2007	don't think about the serial as the result of an algorithm but as the algorithm itself :)
Zaphod 31. Oct 2007	Interesting, ratsoul, the serial being the algorithm itself - are you saying that we don't need to map all the shuffling around of those numbers in the buffer? Because that would be a LOT of work...
unicorn 31. Oct 2007	The serial may be the solution to some problem, like N-Queen problem :)
ratsoul Author 31. Oct 2007	don't think at "low-level" ;)
__imp__ 06. Nov 2007	I've submitted the solution. Very nice crackme!
ratsoul Author 06. Nov 2007	excellent work __imp__ :)
Zaphod 10. Nov 2007	My congratulations to ratsoul for writing an excellent crackme - and to _imp_ for solving it and explaining the solution so well. P.S. It is the hardest level 4 crackme I have seen...:)
ratsoul Author 11. Nov 2007	@Devoney, you are off topic. Post removed.

ratsoul's CrkMe #2

Download CrkMe#2.zip, 245 kb (password: crackmes.de)
Browse contents of CrkMe#2.zip

CrkMe #2 by ratsoul
-------------------
e-mail: ratsoul at autistici.org
--------------------------------

Steps:
a) find the key (use brain)
b) find the serials
c) write a tutorial
x) no patching
x) no brute

I hope you enjoy :)
- ratsoul

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 11. Feb, 2008
Downloads: 514

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Discussion and comments

ratsoul Author 17. Feb 2008	any feedback? comments?
Spooky 18. Feb 2008	Have these Latin words any meaning ? Find a 64-digit key is not so easy ;)
ratsoul Author 19. Feb 2008	The meaning is: "What you are looking for is in this beautiful image". Finding the key it's not the main task of this crackme, so two hints for you: Hint 1: You have to "find" the image Hint 2: You have to find a way to "translate" this image into a string Hope may help ;)

_raven's ende

Download ende.zip, 1 kb (password: crackmes.de)
Browse contents of ende.zip

Only some sourcecode and a encrypted file this time. Write a bruteforce tool to decrypt the file (contains ONLY strings) or try to find a flaw in the algorithm. The key is not longer than 5 characters and contains only ones from this alphabet: '0123456789abcdefghijklmnopqrstuvwxyz'.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Multiplatform
Language: C/C++

Published: 21. May, 2010
Downloads: 352

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Solutions

Solution by lagalopex, published 26. may, 2010; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

redoC 22. May 2010	file contains ONLY strings ... what characters? any from ASC(32) to ASC(126)?
_ghandi_ 22. May 2010	Yes, can you define exactly what type of string you mean please? It makes a big difference to bf design.
Xspider 22. May 2010	@author: at first you said (contains ONLY strings) and then you said The key is not longer than 5 characters and contains only ones from this alphabet: '0123456789abcdefghijklmnopqrstuvwxyz'. this means that there are numbers too ?!
_raven Author 25. May 2010	The decrypted file contains strings only.
_raven Author 25. May 2010	Yes a-z, A-Z. Charset is ASCII.
redoC 25. May 2010	surely a-z, A-Z ? no spaces or dots?
lagalopex 25. May 2010	Just to be sure: key: len<=5 only a-z, 0-9 decrypted string: len=40 only a-z, A-Z No spaces or punctation, then why "stringS"? The sourcecode is the encryption, are you sure the algorithm is reversable?
BoRoV 25. May 2010	the algorithm is not reversable, only brute
_raven Author 25. May 2010	a-z, A-Z, space and punctation are possible of course, think of the tool 'strings' to find all strings in a binary file.
_ghandi_ 25. May 2010	Increasing the keyspace with these extra characters makes it a longer bruteforce process.
lagalopex 25. May 2010	Okay, I solved it ;) (Brute force, all solutions in ~3ms.)
Xspider 25. May 2010	nice :) looking forward that solution :)
_raven Author 26. May 2010	nice solution lagalopex!
_ghandi_ 26. May 2010	nice solution legaloplex.

_raven's Justfun

Download justfun.zip, 4 kb (password: crackmes.de)
Browse contents of justfun.zip

Justfun by _raven
_______________________________________________
Rules:
- No patching
- Solution is a tutorial and a working keygen!
_______________________________________________

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 20. Dec, 2007
Downloads: 854

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by narf, published 24. dec, 2007; download (33 kb), password: crackmes.de or browse.

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Discussion and comments

SIDEBOTTOM 21. Dec 2007	Crashes on my Vista Home Premium desktop stating: "The application has failed to start because its side-by-side configuration is incorrect. Please see the application event log for more detail."
halsten 21. Dec 2007	It executes correctly on my WinXP machine. Maybe it's just VISTA acting normally. :þ
Zaphod 21. Dec 2007	It won't start on my XP machine either. I thought it might be .NET 3 instead af C/C++ as stated. I only have .NET 1 and 2 installed. What do you say about that, raven?
kaspar 21. Dec 2007	For raven:http://www.codeguru.com/forum/showthread.php?t=408061
TiGa 21. Dec 2007	It works for Zairon and me. I use Vista Ultimate x64 and it is usually the worst OS for compatibility. We test crackmes before approving, really.
halsten 21. Dec 2007	Zaphod: I don't have .NET framework installed, and it runs smoothly.
_raven Author 21. Dec 2007	Hmmm... I think you must have .Net 3.0 or .Net 3.5 installed to run it.
halsten 21. Dec 2007	_raven: You think? uhm...you created it, so I suppose you might have a specific reason about that doubt of yours maybe.
_raven Author 21. Dec 2007	@halsten: You are right, but it's not my fault, if it doesnt run on some machines.
halsten 21. Dec 2007	_raven: True, but maybe you can take crash logs? :)
cyclops Moderator 21. Dec 2007	Just checked it to make sure that it runs, and its working fine for me. Needs msvcr80.dll to run. and the manifest says "Microsoft.VC80.CRT" version="8.0.50727.762" ;)
Zaphod 21. Dec 2007	I downloaded msvcr80.dll but that didn't help :(
narf 21. Dec 2007	_raven, your crackme is behaving weirdly... The idivs return negative remainders if the divisor is negative. This causes the crackme to access the xlat table with a negative index and read other stackvars. Is this intentional? Makes coding a keygen somewhat harder, as I have to kind of simulate the stack.
_raven Author 22. Dec 2007	No, that was not my intention, i just forgot, that there also could be negative remainders, i just looked at my source and saw it!
kaspar 22. Dec 2007	First, make it distributable (for everybody). Copy files (msvcr80.dll and Microsoft.VC80.CRT.MANIFEST) from here http://www.ebi.ac.uk/~ajb/scott/ to the justfun folder. (make sure the name "Microsoft.VC80.CRT.MANIFEST" is correct).
Zaphod 22. Dec 2007	This is surely a strange crackme. I downloaded the files mentioned by kaspar. This made the program work. Then I tried entering 3333333333 just to see what happened - and well, sweet miracle, it said Valid serial!!!
_raven Author 24. Dec 2007	Thanks to narf for his solution! I really liked to read it!
synak 24. Dec 2007	@narf nice job, excellent writeup/tutorial.
narf 25. Dec 2007	Thanks, guys -- I had fun writing it, and chewing on your crackme in the first place, of course =)

_raven's no_reason

Download no_reason.zip, 5 kb (password: crackmes.de)
Browse contents of no_reason.zip

The rules are:
-no patching
-no serial fishing

Just write a keygen and submit your solution!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 08. Sep, 2007
Downloads: 447

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Solutions

Solution by alex_ls, published 13. sep, 2007; download (44 kb), password: crackmes.de or browse.

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Discussion and comments

Wasted_Bytes 08. Sep 2007	Sorry but the crackme does not work here..Reinstall the prog and this may solve the problem
Ox87k 08. Sep 2007	For me it works good. However (imho) this crackme is a little bit over rated! Good job raven!
alex_ls 08. Sep 2007	Good job man! I liked to solve it. Solution is on its way!
_raven Author 08. Sep 2007	Thank you for your comments, this makes me happy! On my second computer I also have problems to start this. Maybe that's because i have no Visual Studio installed on it.
madlogik 08. Sep 2007	ez to crack... but the keygenning is harder for me ..
madlogik 08. Sep 2007	spoiler : madlogik B65y-334x-B65y-334x (yeah I read the cmp) ... but how do you trace the serial calculation? thanks
_raven Author 09. Sep 2007	@madlogik: Just set a breakpoint after the read of the serial from the user, the step into the next call that comes and you are at the beginning of the serial calculation. It's at 0x1140 I think. Maybe this helps you a little.
zart 09. Sep 2007	does run on winxp sp2 ;\
zairon Moderator 10. Sep 2007	No zart, it works on winx sp2. Which is exactly your problem?
_raven Author 10. Sep 2007	Maybe you need the "Microsoft Visual C++ 2005 Redistributable" installed to make it work...
zart 10. Sep 2007	Apon execution I get: "The application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem."
zart 12. Sep 2007	@_raven that works; more info here about the problem; http://en.wikipedia.org/wiki/Visual_C++ Read under: Visual C++ 2005 Express
_raven Author 13. Sep 2007	@alex_ls: Good job! :-)

_raven's no_reason#2

Download no_reason#2.zip, 6 kb (password: crackmes.de)
Browse contents of no_reason#2.zip

It's compiled with Microsoft Visual C++ 2005.

The rules are:
-no patching
-no serial fishing

Just write a keygen and submit your solution!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 14. Sep, 2007
Downloads: 451

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Solutions

Solution by alex_ls, published 17. sep, 2007; download (53 kb), password: crackmes.de or browse.

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Discussion and comments

alex_ls 15. Sep 2007	Very nice crackme! It looks harder than first one and exactly corresponds to the level difficulty. I like it!
_raven Author 16. Sep 2007	@alex_ls: Thank you!
_raven Author 17. Sep 2007	thx to alex_ls for his nice solution, but if he always reverses my algo then i have to write a harder one... :) ...so be patient for my next keygenme!

_raven's snow

Download snow.zip, 4 kb (password: crackmes.de)
Browse contents of snow.zip

snow by _raven
_________________________________________________
Compiled with Microsoft Visual C++ 2005

Rules:
- No patching!
- Solution is a working keygen and a tutorial!

It uses a modified algo of my Justfun keygenme.
_________________________________________________

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 23. Dec, 2007
Downloads: 521

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Solutions

Solution by IamTCM, published 04. jan, 2008; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

BieX 23. Dec 2007	when I try to open it, I get this error msg: "serial.bin not found"
BieX 23. Dec 2007	do you want us to create a serial.bin file ourselves? aint that hard afterall
_raven Author 23. Dec 2007	Yeahh this is not hard, but the serial.bin must have a valid content :P
Trey 23. Dec 2007	I'm a little past half way done. Wow you used a lot of math. ;)
Trey 23. Dec 2007	Oh and is this really a level 2? I think it should be harder. But I'm still new to this. Anyone else agree?
Trey 25. Dec 2007	I took a small break but am working on it again. Almost done. Good work by the way. ;)
jE! 28. Dec 2007	if 1 solution is acceptable, why is need keygen?? (there is no Name or PC-unique calculations, ye?)
_raven Author 29. Dec 2007	Keygen is not so hard, if you know how serial checking works! So please write a keygen if you can.
_raven Author 30. Dec 2007	Has somebody solved it already?
IamTCM 01. Jan 2008	Runs on one of my computers, doesn't run on the other. Maybe something weird with the Ming compiler.
IamTCM 04. Jan 2008	Solved. Uses brute-force though, but that's your fault. I'll write a tutorial tomorrow when I sober up.
_raven Author 04. Jan 2008	Thank you IamTCM for your nice solution!

_raven's wish

Download wish.zip, 10 kb (password: crackmes.de)
Browse contents of wish.zip

wish by raven (2008)
Rules:
- No patching!
- Solution is a tutorial and a working keygen!
Compiled with VC 2008, you will need the VC 2008 runtime!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 12. Oct, 2008
Downloads: 327

Rating

Votes: 3
Crackme is nothing special.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

_raven Author 23. Oct 2008	Anyone tried yet?
vsealv 24. Oct 2008	I will crack this one next. Just finished up on Mt2007's. :-)
_raven Author 16. Dec 2008	Nobody solved yet?
kstangl 25. Feb 2009	In the future, please don't infinite-loop; I shouldn't have a crackme using >90% CPU doing nothing.
_raven Author 08. Apr 2009	This "infinite loops" are part of some anti-trace protection, so you will have to patch them out while reversing this one.
T.0.R.N.A.D.0. 09. Apr 2009	"...so you will have to patch them out while reversing this one." You should mention this in the rules above. Instead, you've written : "No patching!"
_raven Author 09. Apr 2009	I meant by "No patching!" that you should not patch it to make it say valid serial to every one you enter.

Rayko's CrackMe

Download CrackMe.zip, 9 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Requires .NET Framework 3 to run

Write Keygen and tutorial for this and upload your solution

Enjoy :-)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 07. Sep, 2008
Downloads: 818

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by spray9, published 11. sep, 2008; download (26 kb), password: crackmes.de or browse.

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Solution by arpm, published 11. sep, 2008; download (30 kb), password: crackmes.de or browse.

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Discussion and comments

Rayko's KeyGenMe#1

Download KeyGenMe#1.zip, 128 kb (password: crackmes.de)
Browse contents of KeyGenMe#1.zip

*********************************
* KeyGenMe#1 By Rayko *
*********************************

Rules:

-No patching
-Keygen is required
-Write tutorial (if you want)
-Upload solution
-Have Fun!

a simple algorithm that MIGHT require a little brain

The crackme/keygenme itself is pretty clean and straightforward since i'm pretty new to c++ myself though!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 13. Sep, 2008
Downloads: 689

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Solutions

Solution by asterix, published 06. may, 2009; download (17 kb), password: crackmes.de or browse.

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Solution by captaintrips, published 23. sep, 2008; download (6 kb), password: crackmes.de or browse.

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Solution by obnoxious, published 15. sep, 2008; download (7 kb), password: crackmes.de or browse.

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Rayko's KeyGenMe#2

Download KeyGenMe#2.zip, 128 kb (password: crackmes.de)
Browse contents of KeyGenMe#2.zip

********************************
* KeyGenMe#2 By Rayko *
********************************

Okay, my second (actually third if you count my first crappy one) keygenme

this one is getting a little harder, not protectiont-wise since i have not learnt any

anti-debugger protection yet...

HOWEVER I HAVE put a LOT more thought into the algo!

let's see some of you crack and make a tutorial out of this one!

!not for the complete newbie!

rules apply as to all others

-No patching
-No bruteforcing
-Write keygen
-Write a tutorial
-Upload solution
-HAVE FUN!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 17. Sep, 2008
Downloads: 846

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Solutions

Solution by asterix, published 11. may, 2009; download (18 kb), password: crackmes.de or browse.

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Solution by egogg, published 20. sep, 2008; download (18 kb), password: crackmes.de or browse.

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Solution by obnoxious, published 19. sep, 2008; download (9 kb), password: crackmes.de or browse.

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Raz0r's Raz0r Crackme #1

Download crackme_1.zip, 27 kb (password: crackmes.de)
Browse contents of crackme_1.zip

Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 05. Sep, 2003
Downloads: 1721

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Solutions

Solution by jps, published 25. feb, 2004; download (55 kb), password: crackmes.de or browse.

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Solution by boylizard, published 16. sep, 2003; download (55 kb), password: crackmes.de or browse.

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Solution by scarabee, published 13. sep, 2003; download (1 kb), password: crackmes.de or browse.

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Raz0r's Raz0r Crackme #2

Download crackme_2.zip, 74 kb (password: crackmes.de)
Browse contents of crackme_2.zip

Crackme created in C++, the second one so far. It is protected with name and serial. Take a look at the text file in the zip for further details.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 28. Oct, 2005
Downloads: 2020

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Solutions

Solution by fjlj, published 03. nov, 2005; download (78 kb), password: crackmes.de or browse.

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Solution by Ox87k, published 03. nov, 2005; download (451 kb), password: crackmes.de or browse.

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Solution by D4ph1, published 03. nov, 2005; download (26 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 28. Oct 2005	name: Ox87k serial: 4xJTGKVakv8E259a very g00d job Raz0r, i don't submit keygen and tutorial because i've no time for this :( sorry... maybe a day ;)
TELOPHASE 30. Oct 2005	Nice work Raz0r. Serial Sniffing was easy as pie, will try to work on the keygen now ;) Name: TELOPHASE Serial: 8Ee2589SLv8E259a PS: Seeing the above posted serial i think that the serial number is of the format "%sv8E259a" bcoz of the following as well :- Name:- Testing Serial:- 8e38FUTakv8E259a
Ox87k 30. Oct 2005	i'm not sure for string "%sv8E259a" but maybe for string "%s8E259a" ex: name: asjdoighau serial: 8s47JQThkB8E259a and if the name have len = 15 and some letters and numbers the string doesn't exist in serial. ex: name: 314eahr8y0755ay serial: f1E88Pe852ILR5G
TELOPHASE 01. Nov 2005	Keygen ready, PM send to Raz0r ;)
Ox87k 01. Nov 2005	ok, also my keygen is ready! I must write a little tutorial and after i'll send my solution... Thanks Raz0r and g00d job TELOPHASE ;)
TELOPHASE 01. Nov 2005	I am really busy so i cant write a tutorial :( and hence cannot submit a soln. :(( PS: I also solved logan's CrackmeV5 :D Made a keygen too! But no time for tutorial :(
Ox87k 01. Nov 2005	eheh, try to submit ur kgn, maybe the moderators publicate it (sorry for english! ghghgh)
D4ph1 02. Nov 2005	I submit a tutorial with a keygen :)
ipmsdos 03. Nov 2005	name:starcwl serial:Lt07BUYakv8E259 ( Lt07BUYakv8E259*) the sn longer than correct sn is also correct.
fjlj 07. Nov 2005	yea i took a different approach to try to teach a few things i recomend everyone check out how i made my keygen
modchip 08. Nov 2005	good job to all of you!
TWiST 10. Mar 2006	I made a patch, so that the program accepts every serial you enter, you can find the patch at: hxxp://www.megaupload.com/?d=N4OF395D I'm working on a keygen, I'm trying to understand the algorithm
HuliGun 11. Jul 2006	I made a patch too :)
jollyjester 26. Nov 2007	name:jester serial:Fe38CXVakv8E259 This may help me with my homework assignment. Thanks.

Raziel's Raziel's KeygenMe v1.0

Download Raziel__s_first_crackMe.zip, 5 kb (password: crackmes.de)
Browse contents of Raziel__s_first_crackMe.zip

Ok, it's my first crackme so do not expect too much.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 27. Oct, 2008
Downloads: 898

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by MoUsE-WiZ, published 10. feb, 2009; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

main 27. Oct 2008	The algo is quite long. Of course, it´s not "hard", but there is some work you must do to produce keygen i think. So maybe level 2 because of that?
main 27. Oct 2008	"long" = Total function is about 2.5 pages in olly (with default settings).
indomit 28. Oct 2008	I don't like long algos :P
main 28. Oct 2008	Nah, me neither, takes too long time :) This algo is quite straight-forward, but I don´t think I want to make keygen anyway. Of course, if you´re lazy (like me), you could just rip it, but i don´t think that goes under keygenning. :)
main 28. Oct 2008	Thank you Raziel for this crackme, it made me develop some tools that could be useful in the future. :)
bendThis 18. Nov 2008	Is the difficulty of this crack-me that is doesnt show anything ? I didnt find anything of an algorithm and the crackme doesnt start. At OllyDbg i can see it sets an ExceptionHandling Routine and i think this is what it does calling an exception and exiting immedetialey. Am i wrong ? Please explain. Thanks.
andrewl.us Moderator 18. Nov 2008	I'm having the same problem as bendThis. The DialogBoxParamA() call fails, returning -1. GetLastError() says nothing is wrong. The DlgProc gets called but ends up receiving a WM_NCDESTROY before anything is displayed.
main 18. Nov 2008	There is one call to IsDebuggerPresent, and the algo starts at 0040141e.
bendThis 19. Nov 2008	Ok. When this is an crackme who checks if is a debugger present i would not categorize this as beginner or easy. But thanks for the hint i try to find my way through it. I am really new to OllyDbg.
bendThis 19. Nov 2008	@4018BE IsDebuggerPresent returns 0, so it doesnt find any debugger like HELP says: "If the current process is not running in the context of a debugger, the return value is zero." And again. It doesnt start or shows anything when i start it right out of explorer. No debugger present at all. I dont use SoftICE. Can someone please write a tutorial that i understand or can compare. Thanks.
bendThis 19. Nov 2008	@4018E0 it should show a Dialog, its calling DialogBoxParamA. But it doesnt at all. So why ? Very strange and i am still believing this file is corrupt.
bendThis 19. Nov 2008	Both ways after @4018E0 are going to the Exit routine and end the program.
main 19. Nov 2008	I don´t understand. Nop:ing the jump after the call to IsDebuggerPresent did it for me anyway. Try downloading the file again maybe?
bendThis 19. Nov 2008	I skip this file. Maybe i am a real real real noob. But i reversed some programs already and found a solution. Not here the crackmes. Some time ago. Now iam new in again. And restart all over. But this file ...... :-(
JoKa 20. Nov 2008	bendThis: Reason is used compiler, not corrupt crackme. Compiler must insert InitCommonControls call, when includes manifest resource, for correct work on all windows. To "heal" the file just remove manifest resource (type 24) with any resource editor for exes.
JoKa 20. Nov 2008	Second way of "healing" is add something from comctl32.dll to import (I just added InitCommonControlsEx). I was wrong: call of InitCommonControls is not necessary. Importing comctl32.dll has great value.
JoKa 21. Nov 2008	andrewl.us, bendThis: Simplest way of "healing" is changing two bytes (offset 21FC from begin of file) 1D 02 to 00 00. This is patching, but it is resource section patching, not code patching. main: What kind of tools did you develop for this crackme? I made keygen by copying text of generation procedure to asm file. It is interesting that resulting dialogbox with message depends on clicking within text edit window. For example: Case 1: Start crackme. Enter (by hands, not copy-paste) name and correct password. Then click in name editbox. Then click Test. Got "You failed". Close crackme. Case 2: Start crackme. Enter (by hands) name and correct password. Then click Test. Got "You succeeded".
main 22. Nov 2008	JoKa: Oh, nothing special, just some WriteProcessMemory stuff. I put a link to that, but it got deleted by moderators (I guess because it was pathing?). I am not done with the final product yet though.
shellwolf 25. Jan 2009	keygen: { sn= sub_4014fe (name,hdinfo) }
main 27. Jan 2009	Hey guys, I have a question... =) I´ve used ReadProcessMemory for some time now and used it to extract information and so, but now I´m thinking, is it possible to dump a (entire) process to disk?
main 27. Jan 2009	Do I have to be in another runlevel?
omeromeromer 18. Feb 2009	hello bro!! em sorry to disturb u!!! sorry em new here!! i just patched it!! coz i dont know how to sniff serials!! pls help us
windowbase 21. Mar 2009	I could sniff a serial...? To sniff means to fish a serial? right? Have a nice day.^^ Kind Regards.
boon 21. Mar 2009	>>main Yes, it is possible to dump an entire process to disk ,without that we would have a hard time defeating packers.
Mr.Andersen 23. Mar 2009	yes, crackme is easy. but long, tooo long. and booored.

rborer's Fais-moi rire

Download Fais-moi_rire.zip, 203 kb (password: crackmes.de)
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I am a Swiss student in computer sciences, doing his diploma on software protection. I would like to know what you think of the following software protection I have been developping.

This example software displays joke (in French only, I am very sorry for that) and, to see the end of the story you have to be registered.

Understanding and cracking the registration procedure is not so hard, but you have to figure out other interesting things before, because you won't be able to change the registration procedure otherwise.

P.S: It's my first crackme, don't forget to read the Readme.txt file, it contains useful informations.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 26. Nov, 2007
Downloads: 225

Rating

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Solutions

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Discussion and comments

EvOlUtIoN 26. Nov 2007	sorry but on my pc the program doesn't work...not crashing, invalid file here.
rborer Author 26. Nov 2007	Does the error message says that you have to reinstall the software ? If that's the case, you need to install the Visual C++ 2005 redistributable package available on http://www.microsoft.com/download/Fais-moi_rire.zips/details.aspx?displaylang=en&FamilyID=32bc1bee-a3f9-4c13-9c99-220b62a191ee (official one) or http://faux.warwickcompsoc.co.uk/vcredist/ (if you don't like WGA). This should solve your problem.
DigitalAcid 27. Nov 2007	Detected 66 crypto signatures (in 0.5s) Well, you made ME laugh =).
rborer Author 27. Nov 2007	I am far from being an expert in cryptography, so maybe I am using some publicly available library that offers cryptography (and that is open source by the way...). So don't be scared by this number, I believe it is only the possibilities offered by this library, not what I am really using ;-)
DigitalAcid 28. Nov 2007	I didn't try to crack it yet, but it's probably like you say. I guess it's used to pack/protect the exe in a way.
dkcoder 29. Nov 2007	Well even after install the redistrutable it does not run. However going over the code in my hex editor, it seems it includes several PE files in one. IE, try to search for the MZ signature, it'll show several PE files is actually inside. Not sure why this is. Since well, i cant even run it. Could you perhaps try to compile it without the need for vcredist?
rborer Author 29. Nov 2007	I wasn't aware of the multiples MZ signature inside the file. Maybe it's because I use statically linked libraries. Anyway, I've done nothing special to PE headers, and the software is not packed. Concerning the vcredist stuff I've already tried multiple compiler flags to avoid having to install it, but I found nothing to prevent it. It seems to be a requirement for every project built with Visual Studio 2005...
w00b 29. Nov 2007	visual studio 2005 makes me angry.. i have it installed and that's probably why i am able to run the program, but as far as someone else running a program i make, i need to keep dreaming!
cyclops Moderator 30. Nov 2007	I am not able run the vcredist, may be i need latest internet explorer or some update from M$ :P The protection is crypto, OpenSSL 0.9.8g :)

RDGMax's [Crackme] RDG Simple Crackme .NET v5 2015

Download RDG.Crackme.net.v5.2015.zip, 387 kb (password: crackmes.de)
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[Crackme] RDG Simple Crackme .NET v5 2015

VB.NET

Try to get the correst serial for your user name

+include some anti debug code

level 5 of 10

thanks

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: .NET

Published: 19. May, 2015
Downloads: 762

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Solutions

Solution by josh, published 29. jul, 2015; download (62 kb), password: crackmes.de or browse.

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Discussion and comments

elmasmalo1 05. Jun 2015	Still trying to understand few things, there is SOOO much code obfuscation, it really makes it difficult. This is my reversing log just in case any other person would like to know some stuff, if it ever helps. QXUQKZ.pYXzSR() : Void //Has the current (Form1) AYqGAp.ePDIfq() : Void //Has the Registered Form ON pYXzSR(): Bunch of buttons, probably to prevent reversers to find the button that handles the serials and stuff! Only 2 Textboxes, This is what we want! Me.XgilGY(New TextBox) Me.SDZPaZ(New TextBox) Jackpot??? QXUQKZ.mMAnma(): Routine checks if Serial is valid? QXUQKZ.sKwmgz() : TextBox (Serial TextBox) and it's assigned by XgilGY(TextBox) : Void This is so far what I have... it's 1:48 AM Need to take a rest :D @RDG, Tell me how I'm doing.
RDGMax Author 05. Jun 2015	excellent! but not enough. this crackme is very easy to solve
elmasmalo1 05. Jun 2015	Ahah, thanks, :D I really see how easy it is for a professional like you, but I'm starting :D - Thanks for the compliment :D, also did you hard coded your obfuscation or you used a 3D party software? I'm really intrigued it is really amazing
RDGMax Author 06. Jun 2015	Con ese nick seguramente hables castellano. obfuscator made in Yo :p
elmasmalo1 06. Jun 2015	Lo hicistes tu? esta demaciado bueno jaja lo que si veo es que hay un patron de mutacion en los nombres de los modulos, por ejemplo: aAbBcC aAcBcC AadBcC aBbBcC aBcBcC aCdBcC aCbBcC Etc etc... jaja espero que entiendas lo que digo :D Pero ya hast ahi llego, me rindo, quisas es mucho para mi, pero como quisiera ver que alguien suba alguna solucion para ver como lo logró!!! jajaja Salu2s y hasta luego! Nota: Quisiera tener tu cerebro! para poder hacer estas cosas! jaja
RDGMax Author 06. Jun 2015	Es tan simple que ni siquiera necesitas un debugger
elmasmalo1 06. Jun 2015	Como! jajaj que increible, en verdad que ya no se que hacer jaja, y ahora dices que se puede hacer sin mirar un debugger! jaja ya tengo el cerebro torcido! mejor se lo dejo a otro :D
zairon Moderator 06. Jun 2015	Only english please
Matteo 08. Jun 2015	seems interesting, i have not downloaded it but i can give you a tip (i hope) why don't you try a .NET deobfuscator? for example DeSmart (which should be used for smart assembly) it will rename everything for you in field1, field2... which is much better than QXUQKZ
elmasmalo1 10. Jun 2015	I know, I've tried running a generic symbol renamer I found online, but I left the assemly corrupted :D

costy 18. Jul 2008	any help about anti-debugging?
DigitalAcid 18. Jul 2008	Yeah, the Optional Header doesn't look alright. I can make it run in Olly, but then it doesn't run anymore outside of Olly =). I still get an error with Olly though. It dumps a file saying the CRC is not correct, but fixing it doesn't seem to help.

RDGMax's RDG Simple Crackme .NET

Download RDG_Simple_Crackme_.NET.zip, 132 kb (password: crackmes.de)
Browse contents of RDG_Simple_Crackme_.NET.zip

A new Crackme :)

Get the correct serial for your username

That is all.

Best Regards

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 14. Aug, 2013
Downloads: 297

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Solutions

Solution by rmolina, published 03. sep, 2013; download (2 kb), password: crackmes.de or browse.

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RDGMax's Simple Crackme 2014 level 2 of 3 (vb6)

Download RDG_Simple_Crackme_2014_v2.zip, 158 kb (password: crackmes.de)
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Crackme Made in vb6.. Goal.. get correct serial. or patch to get correct notification!

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: (Visual) Basic

Published: 13. Nov, 2014
Downloads: 189

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REcodeD's REcodeD KeygenMe #1

Download KeygenMe_1.zip, 2 kb (password: crackmes.de)
Browse contents of KeygenMe_1.zip

The first of my KeygenMe's.

Shouldn't be too easy or difficult for anyone with basic reversing skills, so I rated it accordingly.

Your task is to reverse the algorithm and create a Keygen for it.
No patching.

Good luck and have fun.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 24. Sep, 2010
Downloads: 561

Rating

Votes: 8
Crackme is quite nice.

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Solutions

Solution by Vallani, published 08. oct, 2010; download (5 kb), password: crackmes.de or browse.

Vallani has rated this crackme as quite nice.

Solution by tamaroth, published 08. oct, 2010; download (47 kb), password: crackmes.de or browse.

tamaroth has rated this crackme as quite nice.

Solution by redoC, published 08. oct, 2010; download (21 kb), password: crackmes.de or browse.

redoC has rated this crackme as nothing special.

Solution by KKR_WE_RULE, published 08. oct, 2010; download (227 kb), password: crackmes.de or browse.

KKR_WE_RULE has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

0verbreaK 24. Sep 2010	Did you have keygen for your kgme? I think need brut
KKR_WE_RULE 24. Sep 2010	Yea, Genning it seems out of question. Bruting appears the only applicable soln.
KKR_WE_RULE 24. Sep 2010	I am not so sure now. Saw something amazing while coding !! I can be wrong abt the bruting thing ..
REcodeD Author 24. Sep 2010	It is completely keygenable, I have coded a keygen for it as well.
BoRoV 24. Sep 2010	KKR_WE_RULE, that keygened and simple ;) if u wont I can give u my keygen ;)
KKR_WE_RULE 24. Sep 2010	Sure is..But no need to give me any keygen :) I'll try & figure it out on my own :) The 'Calculate()' function used by the keygen me is giving me trouble. Say My Serial is : 12345678901234567890123456789012345 So first the 1st 25 chars of serial is taken, & 0 is added in front to make it 26. So when '1' is taken by the loop, its ASCII in Hex is 31. So 31 - 30 = 1 But in the next line 1 shl $60 is operated .. & amazingly, the Eax remains 1 . ie according to Olly 1 shl $60 = 1 !! This is what is confusing me :p
redoC 24. Sep 2010	try something like this: 12345678-12345678-12345678-12345678
KKR_WE_RULE 24. Sep 2010	Now the output of ya function is same as my delphi code.. But Damn, That was good :)
KKR_WE_RULE 25. Sep 2010	Keygen + Tut Uploaded :)
Fieryarts 25. Sep 2010	Very nice. I can't wait to see it.
AlexAltea 25. Sep 2010	I have write a keygen, but the keys only work when I open the program with Olly. I don't know why... :S
KKR_WE_RULE 25. Sep 2010	Lol... I faced the same thing :p Think of what changes when a program is opened in Olly, than when its opened Normally :) I am sure ya can figure it out :)
AlexAltea 25. Sep 2010	Thanks KKR_WE_RULE! A little plugin help me. I can't believe how stupid I was. :) Keygen uploaded! That was a great keygenme.
KKR_WE_RULE 25. Sep 2010	Y.W :) This was an easy but interesting kgm. I got a lil complesant at the beginning, & overlooked the $2D Check.. After that I was as careful as always :) Btw Congratz AlexAltea:)
REcodeD Author 25. Sep 2010	I'm glad you liked it. I look forward to viewing your solutions.
jE! 28. Sep 2010	heya, Author, how about PRESERVING registers in DLGmain callback!?!? next time, improve your progg-skills
tamaroth Moderator 07. Oct 2010	keygen and solution submitted as well.
Vallani 07. Oct 2010	Thank you for KeyGenMe. Added my solution also few moments ago. @KKR_WE_RULE: What are you talking about? There is a check of the debug Flag. I didn't see any int 2d?!?
KKR_WE_RULE 08. Oct 2010	Well, may be the modded verision of ya olly fool'd the anit-debug :D But there is an antidebug trick.. The author can confirm it :)
BoogerHaze 08. Oct 2010	REcodeD, thank you for interesting KeygenMe.
KKR_WE_RULE 08. Oct 2010	lol..mine was rejected :)
KKR_WE_RULE 08. Oct 2010	My keygen had a bug. I didn't pad the serial if the hex part is < 8 chars :(
REcodeD Author 08. Oct 2010	Great solutions. I'll work on a trickier KeygenMe when I have the time. @jE! Thanks for the tip, I'll be sure not to overlook that again. @BoogerHaze No problem. 'interesting' is exactly what I was hoping some to think of it. To those of you that gave solutions; Good job and thank you for sharing so others can learn from it as well.

rect's SWF Crackme 1.1

Download SwfCrackMe1.zip, 107 kb (password: crackmes.de)
Browse contents of SwfCrackMe1.zip

1. use Alchemy
2. Adobe Flash Player version 11.1.0
3. this is my first CrackMe and is vary easy!
4. you should read the file "ReadMe.txt" first.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 05. Sep, 2012
Downloads: 212

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Solutions

Solution by deurus, published 30. may, 2013; download (720 kb), password: crackmes.de or browse.

deurus has rated this crackme as nothing special.

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Discussion and comments

abhulla 08. Sep 2012	Check email, i've sent you cracked version.
seVeb 29. Apr 2013	Oo i tested some inputs and after the second attempt the combination e + exxxxx worked
zairon Moderator 29. Apr 2013	Are you sure?
rect Author 14. Aug 2013	good job abhulla~

redbeansoup's 2nd IronPython Nightmare

Download IronPythonCrackme2.zip, 1561 kb (password: crackmes.de)
Browse contents of IronPythonCrackme2.zip

Are these IronPython crackmes unsolveable?

Written in IronPython, for the .NET platform.
Use tools that you would normally crack any .NET program with.

See my previous submission and give it a try, too.
This one is one that checks for a valid keyfile.
A "demo" keyfile is provided, but it won't unlock the crackme fully.

Unacceptable Solutions: None.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 03. Feb, 2010
Downloads: 407

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Solutions

Solution by ejube, published 17. jul, 2010; download (1 kb), password: crackmes.de or browse.

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ReDucTor Author 03. Apr 2007	Any body give it a shot?
neo_40 22. May 2008	i don't know how to make a keygen
lithium 24. May 2008	Well, I personally think that it's "in bad taste" to change the level _after_ a solution is made...
TiGa 26. May 2008	We don't have time to solve every crackme that comes in. The rating is first set by the crackme's author and then adjusted by the moderators AFTER solutions have been reviewed. It has always been that way.

ReHPer's ReHPer CrackMe v1.0

Download CrackMe_v1.0.zip, 315 kb (password: crackmes.de)
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ReHPer CrackMe v1.0

Hi All!

Compiler: CodeGear Delphi 2007

Level: 1/10

Packed: None

Mission:

- Disable NAG Messages
- Unlock 'CHECK' button
- Patching 'CHECK' button protection
- Patch CrackMe ;)
> Write a tutorial. Send solution to crackmes.de ;)

From Russia, with Love. :)

Bye.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 15. Jun, 2007
Downloads: 1635

Rating

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Solutions

Solution by BaKaE, published 26. jun, 2007; download (317 kb), password: crackmes.de or browse.

BaKaE has rated this crackme as quite nice.

Solution by TiGa, published 22. jun, 2007; download (319 kb), password: crackmes.de or browse.

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Solution by qwertydid, published 22. jun, 2007; download (138 kb), password: crackmes.de or browse.

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Discussion and comments

noukeys 19. Jun 2007	I remove nags yet :), now IÂ´m trying to enable CHECK BUTTON, but im never do before :(
BaKaE 26. Jun 2007	this is an easy one. thnx rehper From Germany, with Love ^^
deskyet 27. Jun 2007	Good crackme:D I didn't had any problems with the nags, but to enable the button was fun.

ReHPer's ReHPer KeyGenMe v1.0

Download ReHPer_KeyGenMe_v1.0.zip, 192 kb (password: crackmes.de)
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ReHPer KeyGenMe v1.0

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 24. Dec, 2006
Downloads: 1248

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Computer_Angel, published 14. jan, 2008; download (6 kb), password: crackmes.de or browse.

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Solution by Encrypto, published 03. jan, 2008; download (189 kb), password: crackmes.de or browse.

Encrypto has rated this crackme as boring.

Solution by WoCCC, published 04. jan, 2007; download (302 kb), password: crackmes.de or browse.

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Discussion and comments

str_2006 26. Dec 2006	Its a easy one. I dont have time right now to code keygen, byt in few days i will post the solutions. Good job ;)
Computer_Angel 13. Jan 2008	It's good for newbie like me ^.^

ReHPer's ReHPer KeyGenMe v1.1

Download ReHPer_KeyGenMe_v1.1.zip, 271 kb (password: crackmes.de)
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ReHPer KeyGenMe v1.1

Date: 10.03.07

Compiler - Delphi 7.1+ ReHPer(r) Edition (c) VCL Library

Packed - NONE :D

Level: 3-4/10

Report.
Added:
[!] Added BASE64 Encode function;
[!] New Style;
[x] Productivity in function GetComputerName is increased;

Mission:
Dont not patching!
1). Search valid serial.
2). Write working keygen.
3). Write tutorial.
4). Send to crackmes.de

Example:
Name: ReHPer
Serial: JbGnCZKnDJWrCJSmC30m

Good Luck!

ReHPer. (Saint-Petersburg, Khabarovsk) ;)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 16. Mar, 2007
Downloads: 2408

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Solutions

Solution by Encrypto, published 06. jan, 2008; download (200 kb), password: crackmes.de or browse.

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Solution by l0calh0st, published 13. may, 2007; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

Crosys 16. Mar 2007	nice and easy sended keygen...
red477 17. Mar 2007	um, cannot quite get it. what do you mean by "Example"?
Guetta 17. Mar 2007	Really easy, but funny one ! Thx for this one ReHPer, Gonna send you a keygen =)

Relayer's EXECryptor official CrackMe

Download execryptorcrackme.zip, 428 kb (password: crackmes.de)
Browse contents of execryptorcrackme.zip

You need solve one of the next goals:
1. Patch code and disable sn checking
2. Create new valid sn
3. Create keygen

in file CrackMe.sn you can find list of valid sn for easy of your work :)
More info about EXECryptor you can find on http://www.strongbit.com

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: Borland Delphi

Published: 10. Nov, 2004
Downloads: 3292

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Solutions

Solution by kao, published 07. jul, 2005; download (587 kb), password: crackmes.de or browse.

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Discussion and comments

ge0rge 21. Jun 2005	Looks very difficult. Nobody managed to crack it?
Rammer 07. Jul 2005	Wow! Congratulations to kao! Nicely written tutorial too.
Relayer Author 10. Aug 2005	Good work kao! Bug with serials fixed. Most other "holes" not actually in current version of EXECryptor. You can write to me for getting some encouragement.
EvOlUtIoN 17. Mar 2006	Really a good work Kao! It was very difficult to reconstruct OEP morphed! ;-)
apuromafo 07. Jul 2008	nice work kao i open the kao and see this --------------------------- patched --------------------------- Access violation at address 77E768FD in module 'RPCRT4.dll'. Write of address 77E76915. --------------------------- Aceptar --------------------------- well maybe can add too 00441799 \|. E8 0EFEFFFF CALL patched.004415AC to 00441799 90 NOP 0044179A 90 NOP 0044179B 90 NOP 0044179C 90 NOP 0044179D 90 NOP and mj wrong dissapair because not nag present i have see that was do many code analiced my oep tracert is 44301C without reconstruct oep and if are changed the EP to this direction is run too :) (un your unpacked) nice oep morphed reconstructed and nice tutorial

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Discussion and comments

rendariaka's LoaderCrackMev3.0

Download LoaderCrackMev3.0.zip, 39 kb (password: crackmes.de)
Browse contents of LoaderCrackMev3.0.zip

The objective is to write a keygen.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 08. Nov, 2004
Downloads: 1436

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Solutions

Solution by LuCiFeR, published 11. nov, 2004; download (738 b), password: crackmes.de or browse.

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Solution by el_vena, published 11. nov, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by akcom, published 11. nov, 2004; download (9 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 10. nov, 2004; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

rendariaka's MyLameCrackMe1

Download LameCrackMe1.zip, 4 kb (password: crackmes.de)
Browse contents of LameCrackMe1.zip

This is just a lame crackme I coded on the fly.

Good Luck

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 01. Oct, 2004
Downloads: 1984

Rating

Votes: 3
Crackme is boring crap.

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Solutions

Solution by ReDucTor, published 05. oct, 2004; download (436 b), password: crackmes.de or browse.

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Solution by ManWithNoName, published 05. oct, 2004; download (638 b), password: crackmes.de or browse.

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Solution by Plasmator, published 05. oct, 2004; download (5 kb), password: crackmes.de or browse.

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Solution by xyzero, published 05. oct, 2004; download (741 b), password: crackmes.de or browse.

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Solution by LuCiFeR, published 05. oct, 2004; download (1008 b), password: crackmes.de or browse.

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Discussion and comments

unon 05. Aug 2015	Since everyone gave the solution already what i was about to post but well i ll go one step ahead: "if (StringType.StrCmp(this.SerialBox.Text, "cracked", false) == 0) {" ;)

rendariaka's PackedCrackMev1.0

Download PackedCrackMev1.0.zip, 178 kb (password: crackmes.de)
Browse contents of PackedCrackMev1.0.zip

This crackme should be easy to crack, once you've unpacked it...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 04. Nov, 2004
Downloads: 1643

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Solutions

Solution by haggar, published 10. nov, 2004; download (83 kb), password: crackmes.de or browse.

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Solution by el_vena, published 06. nov, 2004; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

daVektor 22. Dec 2005	I tried to learn a bit about manual unpacking from haggar's tut. However, when I use ollydump, I don't get a working EXE. Instead, I get Entry Point Not Found for RtlGetLastWin32Error -- seems like something's not going on correctly with the import table? I'm using Olly 1.10 and Ollydump 2.11.108. Haggar refers to making sure the Fix Imports is checked and select "Method #2" but I don't have any sort of choice... Can anybody explain?!?
haggar 24. Dec 2005	I solved this one a long time ago and I don't remember what was it. Problem could be bug in ImportREC. Do you have windows 9x, that bug cause dumped files to not work on those machines? You cann find fixed ImpREC at http://tuts4you.com/ under tools. Good luck.
Ganoes Paran 11. Jun 2009	lol, since submissions are still open i might as well... extremly easy if you unpack it...but you don't have to =) will write and upload a solution lol

Revenge's Crack Me If You Can

Download CrackMeIfYouCan.zip, 40 kb (password: crackmes.de)
Browse contents of CrackMeIfYouCan.zip

Crackme name: Crack Me If You Can
Language: C#.NET
Obfuscation/Encryption: No
Difficulty level: 2

Crack it anyway you can but you have to explain what you did...
Good Luck :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 11. Feb, 2011
Downloads: 505

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Solutions

Solution by stlcoder, published 15. aug, 2013; download (77 kb), password: crackmes.de or browse.

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Solution by Zephy, published 21. feb, 2011; download (703 kb), password: crackmes.de or browse.

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Solution by promix17, published 15. feb, 2011; download (40 kb), password: crackmes.de or browse.

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Discussion and comments

promix17 13. Feb 2011	I can't find any sense in this CrackME - It's really RANDOM CrackME!!! But anyway I send solution...
Zephy 15. Feb 2011	I love this crme!!! Hitman, very nice work ;-) ...wait a tut :-)))
Revenge Author 16. Feb 2011	Glad you like it Zephy :)
andrewl.us Moderator 15. Aug 2013	stlcoder's solution has good mix of hacker (ILDasm) and mainstream tools (WinDbg + SOS extension), good job!

Reverend's KeygenMe2

Download KeygenMe2.zip, 10 kb (password: crackmes.de)
Browse contents of KeygenMe2.zip

This is my first submission to crackmes.de But it's not my first contact with reversing :). If you write a working keygen, please send it to me (e-mail address will pop up when the name and s/n are correct). Have fun!

Difficulty: 7 - Very hard
Platform: Windows
Language: Assembler

Published: 08. Feb, 2007
Downloads: 707

Rating

Votes: 8
Crackme is quite nice.

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Solutions

Solution by jB_, published 13. feb, 2007; download (18 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 15. Feb 2007	wow jB you are the best! awesome solution!
Reverend Author 19. Feb 2007	Thanks jB for great tutorial! As the KeygenMe is cracked I published its sources on my homepage (get there via my profile). All the virtual machine code was "compiled" thanks to fasm pwoerful macro system. All the opcodes were automatically defined and I coded it just like using x86 asm (maybe a little different :)). Check out sources if you want to know more.

revme's Szi keygenme

Download revme-crackme-szi.zip, 33 kb (password: crackmes.de)
Browse contents of revme-crackme-szi.zip

szi - a simple keygenme
c++, win32 api
not packed or obfuscated
goal: keygen and solution.txt
glhf

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 14. Feb, 2013
Downloads: 829

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by hepL3r, published 05. mar, 2013; download (47 kb), password: crackmes.de or browse.

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Discussion and comments

hepL3r 22. Feb 2013	Keygen+Solution is attached I was in hurry so sorry if I missed sth in my tut :p

ReWolf's CrackMe #2.1

Download CrackMe#2.1_by_ReWolf.zip, 19 kb (password: crackmes.de)
Browse contents of CrackMe#2.1_by_ReWolf.zip

This CM was created five months ago, but previous version had some bugs (on WinNT and XP). This ver should work on every Win :).
Protection based on simply math and crypto

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 04. Jan, 2005
Downloads: 1070

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Solutions

Solution by Kreet, published 15. apr, 2005; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

ReWolf Author 20. Nov 2005	source code published at http://www.rewolf.cjb.net

ReWolf's CrackMe 4 by ReWolf

Download CrackMe4_by_ReWolf.zip, 171 kb (password: crackmes.de)
Browse contents of CrackMe4_by_ReWolf.zip

Some crypto, some maths...

Rules:
- don't patching
- don't brute-forcing
- required solution: only keygen, nothing more, nothing less...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 02. Dec, 2004
Downloads: 1191

Rating

Votes: 3
Crackme is boring.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

ReWolf Author 22. Dec 2005	source code published at www.rewolf.cjb.net
Cubinator 10. Mar 2015	Cannot find rewolf.cjb.net and Kaspersky says "malware detected"
tomkol 10. Mar 2015	Try rewolf.pl and it's no malware.
tamaroth Moderator 11. Mar 2015	Source is available at http://rewolf.pl/stuff/ReWolf.CrackMe.4.SRC.zip (courtesy of ReWolf)
ReWolf Author 11. Mar 2015	I would post a link to the keygen, but it is without solution, so I guess it would be agains the rules. Anyway, crackme was solved back in 2005.

ReWolf's CrackMe #5 by ReWolf

Download CrackMe5_by_ReWolf.zip, 163 kb (password: crackmes.de)
Browse contents of CrackMe5_by_ReWolf.zip

After six months of working, finally done. Crypto + math + something special :>. It's Unofficial Trial Crackme, so you can post solutions here :]

Difficulty: 7 - Very hard
Platform: Windows
Language: Assembler

Published: 12. Jul, 2005
Downloads: 880

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Solutions

Solution by Tymon, published 24. jul, 2005; download (16 kb), password: crackmes.de or browse.

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Discussion and comments

Otton 27. Jul 2005	Congrats Tymon. MD5 (now I know what it is) stopped me. After some cleaning of it's code I still couldn't identify what it was :( Nice crackme, by the way. Regards, Otton
ReWolf Author 30. Jan 2006	source code available at http://www.rewolf.cjb.net

ReWrit's ReWrit's Crackme#1

Download ReWrit__s_Crackme#1.zip, 127 kb (password: crackmes.de)
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ReWrit's Crackme#1

Ok this is my first crackme.
and its not that hard so its perfect for newbies :)

Rules:
i dont care how you do it, just create a
keygen or selfkeygen.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 23. Sep, 2008
Downloads: 1709

Rating

Votes: 6
Crackme is quite bad.

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Solutions

Solution by Peroxaide, published 02. dec, 2008; download (256 kb), password: crackmes.de or browse.

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Solution by ShadowRayzz, published 27. sep, 2008; download (127 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Alsor 23. Sep 2008	Good afternoon, I am also a newbie, but could it be that there is only one password (Hex: 0x7F97E56C ASCII: 2140661100 ) that is compared at 00401555 with "CMP DWORD PTR SS:[EBP-4],7F97E56C" ? Kind regards from Germany
WarRock 23. Sep 2008	@Alsor yeah that is it :D 00401555 \|. 817D FC 6CE59>CMP [LOCAL.1],7F97E56C 0040155C \|. 75 36 JNZ SHORT ReWrit's.00401594
JoKa 24. Sep 2008	One of the simplest crackmes.
jelly_lover 24. Sep 2008	I am a newbie too. 00401555 \|. 817D FC 6CE59>cmp dword ptr [ebp-4], 7F97E56C.
dkink 24. Sep 2008	哦，非常好。 I use ollydbg to see the "00401555 \|. 817D FC 6CE59>cmp dword ptr [ebp-4], 7F97E56C " I think that we all do it with ollydbg.
Alsor 24. Sep 2008	Thank you. I use Ollydbg :) @WarRock Ok. I only wondered why we should write a keygen for just one password.
simonzack Moderator 25. Sep 2008	he said selfgen was ok, well maybe just replace one of the strings with the pass to print out, won't take too long
simonzack Moderator 25. Sep 2008	ah sorry for double-posting. next time could you not include debug information? It makes the app terribly big thanks
WarRock 25. Sep 2008	keygen or selfkeygen. lol sould i post a keygen ? damn
ShadowRayzz 25. Sep 2008	A hard-coded Decimal value cmp? lol. now tell me this, how u build a key-gen to a hard coded serial check? rofl.
WarRock 25. Sep 2008	Its a hardcoded serial ;)
ReWrit Author 27. Sep 2008	yeah im sorry, wrote wrong in the descriptions, its only one password.
icebot 28. Sep 2008	it was nice ...took me a bit by surprise on i saw in the description to keygen it :P...even tho there was only one password ....hope next one will be more complex :)
GES1234 29. Sep 2008	Happy that this one was indeed very easy, took like 5 second, hate it when easy ones take me all day! Cheers
Yo123 21. Nov 2008	you are right alsor... but you can also make it a self keygen :)
Profeta 23. Nov 2008	Thanks for a good crackme bro!
threv 09. Sep 2015	My first solved crackme, i did it! Nice, thanks for it ;)
xaeroborg 26. Dec 2015	My first solved crackme..Yeee thanks ReWrit
Minuscule 28. Dec 2015	cmp to fixed number can't keygen that.

ReWrit's ReWrit's Crackme#2

Download ReWrit__s_Crackme#2.zip, 312 kb (password: crackmes.de)
Browse contents of ReWrit__s_Crackme#2.zip

ReWrit's Crackme#2

This is my second Crackme, i hope its a bit harden then
the first one. =P
---------------

patch it so the correct password will
be visible (check the picture in zip file)
and upload a solution.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 01. Oct, 2008
Downloads: 1079

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by main, published 05. oct, 2008; download (298 kb), password: crackmes.de or browse.

main has rated this crackme as quite nice.

Solution by JoKa, published 03. oct, 2008; download (296 kb), password: crackmes.de or browse.

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Discussion and comments

main 01. Oct 2008	It´s indeed very easy to find the password, but not _very_ easy to actually implement it. Btw: du är från sverige alltså?
ReWrit Author 02. Oct 2008	japp jag är från Sverige
main 02. Oct 2008	I´ve solved it now. A nice crackme. But I don´t think it´s a level 1, more like level 2 if you compare with other crackmes (spelar ju iofs ingen roll, men ändå). Thanks anyway swedish friend! :)
main 02. Oct 2008	Testa förresten min VBCrackme om du vågar dig in på VBs outgrundliga vägar! :P
zairon Moderator 03. Oct 2008	[Only english here...]
main 03. Oct 2008	Oh, yes, sorry. Only english from now on!
main 03. Oct 2008	I solved this by importing printf with LordPE.
cli3nt 03. Dec 2008	Well, if someone need to patch something to see something then simply replacing jnz is quicker and give us same result.
windowbase 24. Mar 2009	I could not understand JoKa's solution. ^^ 0043F103 \|. 8BCC MOV ECX,ESP 0043F105 \|. 83C1 E0 ADD ECX,-20 0043F108 \|. 894C24 0C MOV DWORD PTR SS:[ESP+C],ECX ; sets argument for call at 401A09 why "ADD ECX,-20" & "MOV DWORD PTR SS:[ESP+C],ECX" must be written, and 0043F189 \|> 66:83F8 64 /CMP AX,64 0043F18D \|. 7C 07 \|JL SHORT cr7.0043F196 0043F18F \|. 66:83E8 64 \|SUB AX,64 0043F193 \|. 43 \|INC EBX 0043F194 \|.^EB F3 \JMP SHORT cr7.0043F189 0043F196 \|> 41 INC ECX 0043F197 \|. 8819 MOV BYTE PTR DS:[ECX],BL 0043F199 \|. B3 30 MOV BL,30 0043F19B \|> 3C 0A /CMP AL,0A 0043F19D \|. 7C 05 \|JL SHORT cr7.0043F1A4 0043F19F \|. 2C 0A \|SUB AL,0A 0043F1A1 \|. 43 \|INC EBX 0043F1A2 \|.^EB F7 \JMP SHORT cr7.0043F19B 0043F1A4 \|> 41 INC ECX 0043F1A5 \|. 8819 MOV BYTE PTR DS:[ECX],BL 0043F1A7 \|. B3 30 MOV BL,30 why 'AX' is changed to 'AL' suddenly? ^^ and why "MOV BL,30" must be written? Could anybody explain it to me kindly? JoKa ~ Can you hear me? ^^ Kind Regards.
breakpoint 21. Jun 2009	@main: why did u use LordPE, printf was already imported? kul crackme, bra jobbat!

ReWrit's ReWrit's Crackme#3

Download ReWrit__s_Crackme#3.zip, 315 kb (password: crackmes.de)
Browse contents of ReWrit__s_Crackme#3.zip

ReWrit's Crackme #3

This one is probably as easy as:
ReWrit's Crackme #1
ReWrit's Crackme #2
...

well i dont know, leave a comment and say what
you think about this one. :)

-----------------------
Rules:
* Make a keygen or self-keygen.
* Patch it so you allways get Good boy message.
* Upload a solution.
-----------------------

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 02. Oct, 2008
Downloads: 1208

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Solutions

Solution by mubai34, published 01. jul, 2014; download (2 kb), password: crackmes.de or browse.

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Solution by user2k, published 08. oct, 2008; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

ShadowRayzz 06. Oct 2008	Slightly harder then 1 and 2, i like it :) waiting for #4.
JoKa 09. Oct 2008	Ha-Ha. I runned crackme first time. Entered 123 as username and password and got Good Job! If I enter numerical username and the same password I get Good.
cli3nt 03. Dec 2008	well this time you need to replace je instead of jnz.
windowbase 23. Mar 2009	I can't understand user2k's solution. ^^ and his keygen don't work fine.
windowbase 23. Mar 2009	Could anyone explain the keygen how it could work nicely? ^^ Kind Regards.
user2k 23. Mar 2009	ok , tested on windows 7 and it doesnt work corectly :) on linux wine it was working :( [so sry...] solution is to write simple search and replace keygen data.asm is dumped table of letters and numbers to search and replace and thats all in this keygen... simply
NylonGamer 21. May 2014	nice bug described by JoKa ;)

ReWrit's ReWrit's Crackme#4

Download ReWrit__s_Crackme#4.zip, 5 kb (password: crackmes.de)
Browse contents of ReWrit__s_Crackme#4.zip

ReWrit's Crackme #4
--------------------
This is my first C# crackme. its extremly simple
so everyone should be able to crack it.

Serial should only be numbers, otherwise you might
get an error.

+--Goals------------------------------------------------+

For Gold: Remove the NAG and Create a keygen.
For Silver: Remove the NAG and Create a self-keygen.
For Bronze: Remove the NAG and Just give me a
Username and a Serial.
+-------------------------------------------------------+

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 06. Oct, 2008
Downloads: 970

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Solutions

Solution by JoKa, published 08. oct, 2008; download (31 kb), password: crackmes.de or browse.

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Solution by main, published 08. oct, 2008; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

ReWrit Author 06. Oct 2008	The Serial cant be more then 10 digits
JoKa 08. Oct 2008	NET assembly is the case when to make keygen simpler than self-keygen I think you must give Gold for self-keygen (without recompiling)
Sinok 09. Oct 2008	CAN you even self-keygen a .NET app? :\
indomit 09. Oct 2008	Sinok, it's very easy with Reflector+Reflexil
Killalord1 09. Oct 2008	@someone... how can i disasambly it in Reflector?? (got the reflexil plugin.....) I will try to look at the code tomorrow in ollydbg (i'm in austria)
JoKa 10. Oct 2008	I think, Reflexil does recompiling of code
JoKa 10. Oct 2008	Killalord1: To find the right code in OllyDbg(1.10) do this: Load app in Olly (it will start automatically unless you change some options). After NAG displayed press Pause in Olly. Then go away (Run till return + Step over) until EIP will be in main thread (when program will not stop press OK in NAG MessageBox). There you can see made by interpreter machine code. After some tracing you can see other parts of code (including key generation code). But it is not convenient way of exploring the code.
Killalord1 13. Oct 2008	@joka ok thx... i will see if i can find it..

ReWrit's ReWrit's Crackme#5

Download ReWrit__s_Crackme#5.zip, 295 kb (password: crackmes.de)
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ReWrit's Crackme #5
...

feels like .NET crackmes aint that fun
so im gonna stick to C++.

tho im not that good programer so if
someone wanna help me a little to write a
crackme, or we could write one together.
just send me a msg :)

-------------------------------------------
Rules:
* Gold: Make a keygen
* Silver: Make a Self-Keygen
* Bronze: Patch it so it allways display
the Good Boy message.
* Upload a solution.
-------------------------------------------

Name: ReWrit's Crackme #5
Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 12. Oct, 2008
Downloads: 1531

Rating

Votes: 6
Crackme is quite bad.

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Solutions

Solution by Peroxaide, published 02. nov, 2008; download (152 kb), password: crackmes.de or browse.

Peroxaide has rated this crackme as boring.

Solution by main, published 21. oct, 2008; download (2146 kb), password: crackmes.de or browse.

main has rated this crackme as nothing special.

Solution by itsho, published 18. oct, 2008; download (702 b), password: crackmes.de or browse.

itsho has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

main 13. Oct 2008	ReWrit, please change the pause>null statement. You will create a file called null instead of pipelining to nul. But even better, replace it with getch() or getchar(). Or if you are writing C++, please use cin.get(). Thanks in advance!
ReWrit Author 13. Oct 2008	ok i will in my comming crackmes.
JoKa 14. Oct 2008	I didn't see nothing new in this crackme. You still get username length, do some calculation, get number and compare this number with entered text.
HamptonHills 14. Oct 2008	how do i do the internal keygen? i think this may be too hard for me lol
STaRDoGGCHaMP 16. Oct 2008	Calculating a password is pretty easy (as already mentioned), here a little pseudo code: pass = strlen(name) pass = 3pass pass = pass shl 2 pass = pass^3 pass = pass + 23 pass = pass + pass 708224
ReWrit Author 16. Oct 2008	cmon now. i wanna see a keygen :)
doggbielord 16. Oct 2008	i havent enought expert to Write a Keygen but Soon i will could :-) i made patch now
itsho 17. Oct 2008	1 @STaRDoGGCHaMP: i got the same result as you did, but doenst really works for all usernames - only for short ones. funny. 2. tried to make self-keygen - but it keeps crash :-(
STaRDoGGCHaMP 17. Oct 2008	hmm, My keygen works for every username (length doesn't matter)
ReWrit Author 18. Oct 2008	upload it then :)
main 18. Oct 2008	My first video solution on the way! :)
Peroxaide 02. Nov 2008	Meant to rate this just ok :) . This is one of those nice ones for starters.
windowbase 22. Mar 2009	I just fished a serial for my initial. ^^
blackjoker 22. Mar 2009	@offset at 4015a2 jne 000000A3C > je 000000A3C Good Job! And Thank You "Boring" I'm a Thai

ReWrit's ReWrit's Crackme #10

Download ReWrit__s_Crackme_#10.zip, 135 kb (password: crackmes.de)
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ReWrit's Crackme #10

I Guess this crackme is pretty easy
but give it a try =)

Rules:
-------------------------------------
* Only Keygens will be allowed
-------------------------------------

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 15. Feb, 2009
Downloads: 1060

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by ForFun, published 25. feb, 2009; download (10 kb), password: crackmes.de or browse.

ForFun has rated this crackme as nothing special.

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Discussion and comments

ReWrit Author 22. Feb 2009	come on guys, give me a solution =)
ForFun 24. Feb 2009	I think this is more a 2-3 in difficulty. I doubt a newbie will find it that easy, but a good little crackme to get you adrenalin pumping :)
ReWrit Author 25. Feb 2009	thx for solving it ForFun =), well i dont think its a lvl 3 crackme, maybe on the edge to lvl 2,,
Sergeus 04. Mar 2009	I'm newbie and it was easy 4 me, but thanks! Good job!
mazuki 07. Mar 2009	I thought it was higher than level 1 since it required a keymaker, if it was just a crackme, then level 1 definitely. Great tutorial ForFun, but you used extra functions you really didn't need to in your code ;)
windowbase 20. Mar 2009	I just fished the serial for my initial. I'm just a newbie.
MrGneissGuy 11. Apr 2009	I think each of us has their own definition for "newbies".

ReWrit's ReWrit's Crackme #11

Download ReWrit__s_Crackme_#11.zip, 148 kb (password: crackmes.de)
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ReWrit's Crackme #11
----------------------------------------------
This is my first crackme/keygenme
that has "One-name-many-serials",
my other crackmes only have one
serial for each name so give this
bastard a try =)

Special thx to Numernia for helping
me with this crackme.

Rules / Goals:
----------------------------------------------
* Gold: Keygen and solution + Bronze
* Solver: Try it and rate it
* Bronze: -

* No Self-keygen, i want a real
keygen
----------------------------------------------

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 19. Feb, 2009
Downloads: 578

Rating

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Solutions

Solution by ForFun, published 27. feb, 2009; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

zero5 21. Feb 2009	nice exercise for patching, was quite easy but i'm too lazy for writing a keygen :P i wouldnt rate it as very easy, but as "Needs a little brain" because of the "anti debugger protection" lol
ForFun 26. Feb 2009	I disagree.... I dont think MD5 hashing and modulus aritmetics are newbie stuff ! Just my 5 cents ;)
zero5 27. Feb 2009	yeah, depends on how u wanna solve it.. its easy to patch but much harder to keygen
MACH4 28. Feb 2009	@ForFun Nice keygenning tute mate! I would have thought d3 MACH4
ReWrit Author 28. Feb 2009	182 download and only one rating? come on guys.. its allways fun to see your crackme get rated =) =P
JukJuk 28. Feb 2009	damn guys, i am new here, so im trying to download the crackmes to learn, but most of the times i miss some points, like: what is it to place a RETN, like ForFun said, what is it to run after placing this RETN and why the of the target still existing is important? thx in advance
ForFun 28. Feb 2009	@JukJuk: I'm not sure what you mean ? I guess you refer to the anti-debugging trick !? I mean you have to replace the code at 401390 and 401424 with the command RETN. Or as the tut also state: use Olly Advance or similiar plug-in :) @ReWrit: Maybe I'm the only one who solved it 8P !?
MACH4 28. Feb 2009	@ReWrit Nice keygenme btw! The problem might have been it's published low difficulty rating, must admit I didn't look at it for that reason! @ForFun Sorry a typo, I meant to agree with you difficulty 3-4. btw small question. In your asm source, Why didn't you use GetModulaHandle ? and ExitProcess, eax Not complaining, just wondered? @Mods Why doesn't the rating reflect what you select in the rating box? ForFun gives a rating of quite nice. but its not there in the select box? MACH4
MACH4 28. Feb 2009	@ReWrit, It's not much point giving several solutions if a good one is already posted, unless someone uses an interestingly different way to solve it! MACH4
ForFun 28. Feb 2009	@MACH4: I used template in RADasm to create the window creation, but the argument used by ExitProcess is simply an exitcode. You dont need to use handle of module. You can use any value you want !
ReWrit Author 28. Feb 2009	changed it to lvl 2 now coz some said it was too hard for lvl 1

ReWrit's ReWrit's Crackme #12

Download ReWrit__s_Crackme_#12.zip, 32 kb (password: crackmes.de)
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ReWrit's Crackme #12
---------------------

Another Crackme.

Rules / Goals:
--------------------------------------
* Write a keygen and tutorial
* No Patching(includes self-keygen)
--------------------------------------

MODERATOR EDIT: some computers pop up error "application configuration is incorrect" or similar ... try to download the microsoft visual studio redistributable package

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 04. Mar, 2009
Downloads: 485

Rating

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(we have only 1).

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Solutions

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Discussion and comments

ReWrit Author 07. Mar 2009	is anyone working on a tutorial yet? =)
Troyx 07. Mar 2009	ReWrit Keygen will be soon ;) And won't just source (C++) of keygen will be enough as "tutorial"? Plus list of key offsets like where debugger-check is and where validation starts...
ReWrit Author 14. Mar 2009	just write a regualar solution like everyone else does and include a keygen
ReWrit Author 21. Mar 2009	hows it going ppl? =) new crackme comming up soon but i would like a solution to this one first...
Ganoes Paran 11. Jun 2009	Just downloaded and opened in olly and it said that it was compressed/packed/w.e. and i was like what? opened in PEiD and i see this Microsoft Visual C++ 8.0 [Debug] Please upload the "Release" version. thanks =) **Debug is probably reversable but I just think it's code is just a bit too messed up in olly =(

ReWrit's ReWrit's Crackme #13

Download ReWrit__s_Crackme_#13.zip, 128 kb (password: crackmes.de)
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ReWrit's Crackme #13
--------------------
This crackme feelt a little different from
my other ones... i dont know why but it
would be nice if your solution tells me what
this crackme does =)
Its really easy to fish a password but that
not the goal here.

Rules / Goals:
--------------------------------------
* Create a keygen and write solution
* No Patching(includes self-keygen)
--------------------------------------

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 10. Apr, 2009
Downloads: 910

Rating

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Solutions

Solution by Holy, published 30. apr, 2009; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

T.0.R.N.A.D.0. 11. Apr 2009	@ Author Nice CrackMe :)
D!PSW!TCH 11. Apr 2009	i found a valid serial, but not really found the algo
dustin 19. Apr 2009	I founf the first algo that generated by login and constant string but i confused at serial algo. Btw i found a valid serial too but thats not enough i guess
ReWrit Author 20. Apr 2009	nope, i want a keygen =)
j2innet 24. Apr 2009	any discussion group or forum that can talk abt possible solution?
Holy 30. Apr 2009	It wasnt so hard :P

ReWrit's ReWrit's Crackme #6

Download ReWrit__s_Crackme#6.zip, 98 kb (password: crackmes.de)
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ReWrit's Crackme#6

Rules:
--------------------------------
* Only Keygen will be accepted.
* Self-Keygen is not allowed.
--------------------------------

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 16. Oct, 2008
Downloads: 1041

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by JoKa, published 11. nov, 2008; download (4 kb), password: crackmes.de or browse.

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Solution by Acorpxx, published 11. nov, 2008; download (103 kb), password: crackmes.de or browse.

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Discussion and comments

ReWrit Author 20. Oct 2008	132 download and no comments? anyone working on a keygen yet? :)
main 20. Oct 2008	As soon as I get some time over, I´ll post a solution. I´ve found the routines anyway. This one is a bit harder than your previous cm´s if you think in terms of making a keygen. Nice cm anyway (and thx for the greets)! :)
nkcss 20. Oct 2008	I've found the routine where you generate the password. 00401C18 . 8B85 C4FDFFFF MOV EAX,DWORD PTR SS:[EBP-23C] ; \|\|Password? Prefix: 00401C22 . 8D85 98FCFFFF LEA EAX,DWORD PTR SS:[EBP-368] ; \|\|ReWrit- Post: 00401C30 . 8D85 98FBFFFF LEA EAX,DWORD PTR SS:[EBP-468] ; \|-Swe Just trying to find out now how to create a keygen (just started ASM yesterday), don't fully understand the code yet. In my case, the l/p was: nick / ReWrit-10990496671870608401-Swe
nkcss 20. Oct 2008	Maybe someone can give me some pointers. I've been trying to get the application to somehow dump the valid key, no matter what the input was. My first idea was to trigger a MsgBox, but User32.dll wasn't loaded in the application. Since I've never written to the console, I tried to replicate the functions in the ASM like so: 00401B70 E9 A3120000 JMP ReWrit's.00402E18 ; Find a way to patch code and show a messagebox 00401B75 90 NOP ... 004045E3 894424 04 MOV DWORD PTR SS:[ESP+4],EAX ; Push Generated Valid Serial Into Buffer 004045E7 E9 28E8FFFF JMP ReWrit's.00402E14 ; Jump to Second part ... 00402E14 C70424 C0834400 MOV DWORD PTR SS:[ESP],ReWrit's.004483C0 ; 2nd part to write to console 00402E1B E9 551D0000 JMP ReWrit's.00404B75 ; Jump to 3rd part ... 00404B75 E8 AEB90300 CALL ReWrit's.00440528 ; Call ReWrit's Console Write 00404B7A E9 A3010000 JMP ReWrit's.00404D22 ; Jump to 4th part ... 00404D22 8985 C4FDFFFF MOV DWORD PTR SS:[EBP-23C],EAX ; Original Code! 00404D28 ^E9 49CEFFFF JMP ReWrit's.00401B76 ; Jump Back These are the patches I made in the code (wasn't able to find a large enough memory space, so had to use 4 NOP fields that were unreferenced). The code crashes on the 2nd part, where it references 004483C0. If I NOP that part, it works, but nothing gets written out. Can someone give some info as to what I am doing wrong and how I would go about this? Thanks in advance.
main 20. Oct 2008	You can free up a lot of bytes by nop-ing the SetConsoleTextAttribute API. The only thing you will "loose" is the text color. I have a keygen to this, but if you want to patch it so it prints the password you can look at my patch: http://rapidshare.com/files/155948113/ReWrit_s_Crackme_6.Patching.Solution.by.main.zip.html
nkcss 21. Oct 2008	Thanks a lot main, it looks so clean the way you do it :) I've found the parts you edited, and I must say: nicely done. You've used his own functions for everything (might be shorter to just add the pre and post text hardcoded, but my ASM isn't up to par to be able to tell if that is the case or how to go about it). I'll continue along with Iczellion's ASM tutorials and come back later to understand it better. Btw, and other tutorials regarding MASM that I should read up on that would help me patching/rebuilding code?
main 21. Oct 2008	nkcss: Thanks! :) I think Iczellion's tutorials are the best, but if you want to you could buy "Introduction to Assembly Language Programming" ISBN: 0-387-20636-1, it´s really good and detailed. You also have "REVERSING - Secrets of reverse engineering" ISBN: 978-0-7645-7481-8. Keep on coding!
nkcss 21. Oct 2008	Thanks for the tips! I'll be sure to check them out. I also started reding the art of assembly: http://maven.smith.edu/~thiebaut/ArtOfAssembly/artofasm.html
nkcss 21. Oct 2008	I've been able to 'aquire' both books. I must say that I'm exited :) The only downside that I can think of is that the 2nd revision of "Introduction to Assembly Language Programming" is focued on NASM and Linux, gcc and gdb, when I run Windows, MASM32, OllyDbg, IDA Pro and Microsoft Visual Studio :). The other thing is that I am missing out on some basic Win32 api info that .NET has always taken care off for me (messed around with basic gui controll api's and windows messages, but none of the real basics) that I don't even know how to write to a console application from scratch (to bad int 21h no longers, 16-bit knowledge in a 32-bit world :P). On the other hand, I've been meening to mess around with Backtrack 3 and ubuntu since I've had a lot of fun in the past playing with Red Hat 5.3.
main 23. Oct 2008	Ok. Keygen + optimized source here: http://rapidshare.com/files/156795822/ReWrit.CrackMe06.Keygen.by.main.zip.html I have no time to write solution now, maybe later. But here is source and keygen. "optimized source" = replaced 2 functions with 1.
ReWrit Author 28. Oct 2008	ok, 593 downloads now, atleast one if you should be able to create a keygen and write a solution...
main 28. Oct 2008	ReWrit: You have keygen + source above. I just don´t have time to make solution at the moment. Maybe later. :)
ReWrit Author 28. Oct 2008	yes i know but i want the solution uploaded at crackmes.de
blackfire 31. Oct 2008	Unfortunately i solved it by luck :( but am just want to get my magic spot to know the routine . can u help geeks

ReWrit's ReWrit's Crackme #7

Download ReWrit__s_Crackme_#7.zip, 150 kb (password: crackmes.de)
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ReWrit's Crackme#7

This crackme has 3 parts:
part 1. Serial fishing (numeric serial)
part 2. Keygening (numeric serial)
part 3. Keygening (alphabetic serial)

Rules:
-------------------------
* Make a Keygen.
* No Self-Keygen.
* No Patching.
-------------------------

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 02. Nov, 2008
Downloads: 1273

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by JoKa, published 24. nov, 2008; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

ReWrit Author 03. Nov 2008	i dont know if lvl 3 might be too hard for this one, maybe it should be called lvl 2 instead? tell me if i choose wrong difficult lvl
main 03. Nov 2008	Second part is hardest in my opinion.

ReWrit's ReWrit's Crackme #8

Download ReWrit__s_Crackme_#8.zip, 40 kb (password: crackmes.de)
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ReWrit's Crackme #8

Kinda easy crackme...
you just have to patch it so it shows
the correct password in the (gray)textbox
and remove the nag... so the goals are:

Goals:
--------------------------------------------
+ Remove the nag.
+ Patch it so it shows the correct password.
--------------------------------------------

good luck :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 05. Jan, 2009
Downloads: 425

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Solutions

Solution by indomit, published 12. mar, 2009; download (42 kb), password: crackmes.de or browse.

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Discussion and comments

main 06. Jan 2009	If you generate the number in the same proc as you do the check, there is not much room for any other code like printing the password. Is this intended?
costy 07. Jan 2009	I successful removed the nag and the password is displayed in the textbox on the bottom but I removed the New Form2().Show line. I don't know why but reflector gives me some problem with it...
indomit 12. Mar 2009	We know the password only when the user clicks the button. We can't pre-specify a password, because we didn't know when the user clicks the button. As password generated from system time. Only thing we can do is to store system time at first pre-generation and restore it before new generation. But I do not know this is possible to catch/leave the time in right moment.
indomit 12. Mar 2009	Ha-ha. Else we can wait about 50days, after user click when TickCount will be the same again :) :lol: So only way I see is to repalce(patch?) Random() to Random(saved_tickcount). Is this allowed? =)
ReWrit Author 12. Mar 2009	yep, as long as it show the correct password as your solution does its ok =)

ReWrit's ReWrit's Crackme #9 noob challenge

Download ReWrit__s_Crackme_#9_noob_challenge.zip, 31 kb (password: crackmes.de)
Browse contents of ReWrit__s_Crackme_#9_noob_challenge.zip

ReWrit's Crackme #9 .NET Noob Challenge

This crackme is dedicated to beginners
for .NET cracking. It has 5 parts:

Part 1: Serial Fishing
Part 2: Serial Fishing
Part 3: Keygening
Part 4: Serial Fishing and patching
Part 5: Keygening and patching

Rules:
------------------------------------
Do not patch so other parts are
open, you have to get the password
for every part to unlock the next
one.
Dont patch the nag, you remove it
with the correct password.
------------------------------------

Good luck =)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 15. Jan, 2009
Downloads: 875

Rating

Votes: 7
Crackme is nothing special.

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Solutions

Solution by wibf, published 03. sep, 2009; download (53 kb), password: crackmes.de or browse.

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Solution by c0nr4id3r, published 02. mar, 2009; download (95 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

WinFan 15. Jan 2009	Really nice crackme for beginners, i think this one can help many newbies!
GordonBM 15. Jan 2009	I tried to keygen at part 3, but I always have the same result...0 You put i as 0 and you can't multiply by 0. I'm lost lol.
The So;X 16. Jan 2009	Happy new year to ya
WinFan 16. Jan 2009	Part 3 can be done with easy copy 'n paste ;)
GordonBM 16. Jan 2009	Aw, now I'm stuck at part 4! I have the serial but I can't paste!! =(
ReWrit Author 19. Jan 2009	has anyone solved it yet? :)
simonzack Moderator 22. Jan 2009	of course many people have solved it just nobody write solutions :p btw I don't have vs, it seemed strange .net's output differs from javascript's
obnoxious 01. Feb 2009	Well do you guys need a solution for it. Will upload one by evening.
The So;X 02. Feb 2009	did any one solve phaze 3 of the crackme coz i am really get f*** up by this one .. error : can not able to conver string into value
Kalippan 03. Feb 2009	if anyone need a solution i can provide it.. have phun..
indomit 12. Feb 2009	Very good crackme. I think with this one we don't need more 1-level crackmes for .net :)
ReWrit Author 12. Feb 2009	glad you like it =)
Filler 13. Feb 2009	For beginners, best one. I think it is not require to write a Tutroial, how to crack it... =D
c0nr4id3r 28. Feb 2009	I've written one, and i already submitted it, sry for my bad english in the tut.
wibf 23. Aug 2009	hi this wibf , i submission ma solution for part 1 ,2,3,4,5 but the problem in part 4 and part 5 i must edit the code in textbox6 event because u didn`t give any of those constant chars to be writtten in the textbox6.text in runtime and i tried to edit using ollydbg but am faied do if u know programe that i cane edit exe created by dot net so send it and i will patch the exe by editing the textbox event delete it`s contetns so plz send name of programe edit exe created by dot net ; thx
c0nr4id3r 30. Aug 2009	Read my solution, i mention the programms used in there. It's ildasm for decompiling the Exe and ilasm for compiling it. You can use the Freflexil-Addin for refelctor, too.
owl1 01. Sep 2009	I get an error when I try to run this crackme. It says something like "the application fail to initialize properly. Click Ok to terminate." Did anyone experience the same issue? I am running a virtual XP machine.
Knight 02. Sep 2009	I think you dont have .net framework installed.
wibf 08. Sep 2009	thx c0nr4id3r for ur concern

reywen's CrackMe 2

Download crackme.v2_reyw.htb.zip, 6 kb (password: crackmes.de)
Browse contents of crackme.v2_reyw.htb.zip

hmm try solve it, simple algo implemented ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 24. Apr, 2005
Downloads: 2588

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Solutions

Solution by Kreet, published 28. apr, 2005; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

SmellyMoo 04. Feb 2009	Virus. as detected by avg.
$kip 14. Feb 2010	Like smelly said IT IS a virus and you are a f**n Script-Kiddie!
Xspider 16. Feb 2010	no it's just packed with FSG
lilalexq22 06. Jul 2012	This file was already analysed by VirusTotal on 2009-07-26 05:46:46. Detection ratio: 27/41 You can take a look at the last analysis or analyse it again now. I think its a virus. Wouldnt take a chance
congchuahoatuyet1997 04. Aug 2012	because FSG make all antivirus don't trust this, you need disable them to continue crack this
missinginbytes 27. May 2013	why don't you reverse it and publicly release the analysis first before blame the guy...

rezk2ll's BeatME

Download BeatMe.zip, 839 b (password: crackmes.de)
Browse contents of BeatMe.zip

hello !
the task is simple :)
just try to make a working keygen for this crackme !
good luck and have a good day :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 23. Sep, 2015
Downloads: 184

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Solutions

Solution by aldeid, published 10. dec, 2015; download (150 kb), password: crackmes.de or browse.

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Solution by acruel, published 25. sep, 2015; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

acruel 23. Sep 2015	Sorry. I've uploaded a wrong solution. Please reject it or I'll upload a new version later.
rezk2ll Author 23. Sep 2015	your solu still in queue
acruel 23. Sep 2015	Just updated. Thanks. ;)
aldeid 05. Dec 2015	My solution posted here: https://www.aldeid.com/wiki/Solution-rezk2ll-BeatME

rezk2ll's Crackme_Nasm

Download CrackMe_ASM.zip, 915 b (password: crackmes.de)
Browse contents of CrackMe_ASM.zip

simple crackme coded in assembly ( NASM ) :p for newbies

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: Assembler

Published: 21. Jan, 2015
Downloads: 532

Rating

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Solutions

Solution by Delirium, published 07. feb, 2015; download (854 b), password: crackmes.de or browse.

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Solution by 1995parham, published 07. feb, 2015; download (425 b), password: crackmes.de or browse.

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Solution by josamont, published 07. feb, 2015; download (500 b), password: crackmes.de or browse.

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Solution by draww, published 07. feb, 2015; download (10 kb), password: crackmes.de or browse.

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Solution by downabc, published 07. feb, 2015; download (830 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

rathos 26. Jan 2015	BUG mov ecx, ds:flag mov ebx, ds:var cmp ecx, ebx jnz short failure ./CrackMe_ASM Flag : S3Cr you are correct !
易木马 01. Feb 2015	Flag：S3CrE+Fl4G! but ,just begin with S3Cr,we can go right way!! like this : S3Cr1111111111111111111111 S3Cr232313134335345fdgdgdgfdfsa ok! ecx ,ebx only saved 4 byes,
rezk2ll Author 02. Feb 2015	my bad xD i will fix it
shahril 25. Feb 2015	try to use cmps for comparing strings http://www.tutorialspoint.com/assembly_programming/assembly_cmps_instruction.htm
cd0c 11. Jun 2015	done in 2 minutes. very simple.
printf 13. Aug 2015	Nice one :) solved it with radare2
0x4a414154 06. Oct 2015	there was the bug and because of the bug, I didn't need the rest of the string, lol
bluehex 05. Jun, 03:34	Essentially, it asks for input and writes it to memory. Next, it loads the flag one char (8 bytes) at a time into memory. Lastly, it compares your input with the flag in memory. If they're equal the jump is not taken and you solve it.
bluehex 05. Jun, 03:35	*8 bits at time. Cant edit my comment, oops

rezk2ll's f1nd_My_k3y5

Download f1nd_My_k3y5.zip, 1 kb (password: crackmes.de)
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Hello !
the task is simple , just make a keygen that generates valid keys for this crackme !

I hope you enjoy it and good luck !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 11. May, 2015
Downloads: 247

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Solutions

Solution by m1nstr3l, published 10. jun, 2015; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

zbychu 22. Jul 2015	Solved :-) Pretty nice.

rezk2ll's KeygenmeNasm

Download KeygenmeNasm.zip, 1 kb (password: crackmes.de)
Browse contents of KeygenmeNasm.zip

KeygenmeNASM written in assembly ( NASM )

*task = make a keygen for it ! + no patching :p
*rank = easy :p
*have fun :) and good luck !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 19. Feb, 2015
Downloads: 158

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by jockcranley, published 18. may, 2015; download (2 kb), password: crackmes.de or browse.

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Solution by bat.serjo, published 22. apr, 2015; download (5 kb), password: crackmes.de or browse.

bat.serjo has rated this crackme as quite nice.

Solution by vigilanz, published 22. apr, 2015; download (1 kb), password: crackmes.de or browse.

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Solution by draww, published 16. mar, 2015; download (8 kb), password: crackmes.de or browse.

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Solution by x3ae12, published 16. mar, 2015; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

tibl 06. Mar 2015	my first keygenme! I enjoyed it
rezk2ll Author 10. Mar 2015	that's great :) you can make a write-up if you want to !
l0lvvu7 10. Mar 2015	Easy one but nice :) My writeup on it: https://legdbsurlherbe.wordpress.com/2015/03/09/keygenme-softly-pt-i/ Don't read if you don't want to get spoiled.
draww 12. Mar 2015	already submitted my tut+keygen (Feb, 24th) but still under mod review ;) (all done with static analysis btw)
jockcranley 28. Apr 2015	Had a lot of fun with this one.
Organis 29. Apr 2015	Thanks for this nice keygenme :) I did a C# keygen and a tutorial (french only sorry) : http://organis-official.blogspot.fr/2015/04/keygenme-nasm-by-rezk2ll-keygenning.html
rezk2ll Author 04. May 2015	great work guys (y)

rgcalsaverini's crackme_de2_1

Download cmrgc1.tar.gz, 10 kb

This is my first cm :) Shouldn't be too hard.
Just try to find a working key or make a keygen.
Please NO patching/injecting!

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 13. Dec, 2013
Downloads: 733

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Solutions

Solution by Qnix, published 02. jan, 2014; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

Catalyst 25. Jan 2014	hey how to open it with ollydbg
tomkol 26. Jan 2014	"Platform: Unix/linux etc." - as you can see no olly this time.

rith's crackme #1

Download rith_crackme1.zip, 4 kb (password: crackmes.de)
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name/serial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 14. May, 2000
Downloads: 1615

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Solutions

Solution by czdrillard, published 14. may, 2000; download (2 kb), password: crackmes.de or browse.

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Rnd0M's keygenme

Download keygenme_v2.0.zip, 199 kb (password: crackmes.de)
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keygenme wrote in delphi7 for newbies. it is easy. good luck

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 30. Jul, 2013
Downloads: 900

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by zhc_ykt, published 28. oct, 2013; download (4 kb), password: crackmes.de or browse.

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Solution by givses, published 15. aug, 2013; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

Rnd0M Author 17. Aug 2013	it doesn't work for two characters :(
botanyaki 08. Apr 2014	Thank you. this is so difficult for another reason.

RooJ's Button Race!

Download button_race.zip, 9 kb (password: crackmes.de)
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Keygenme, a poor algo for a poor game :)

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 20. May, 2004
Downloads: 966

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Solutions

Solution by LuCiFeR, published 20. may, 2004; download (711 b), password: crackmes.de or browse.

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Discussion and comments

RootSec Author 08. Oct 2005	Its my first crackme, I hope you like it!
konstAnt 09. Oct 2005	Well, solved and solution submitted I'm waiting for mod's response. If accepted 'll be my first tut... SO my heart's is hardly beating...
bigboss1988 09. Oct 2005	lol olly closed change ollydbg.exe for ollyeedbg.exe ^_^ wait konstant i wanna crack it ^_*
RootSec Author 09. Oct 2005	Good work konstAnt ;) Yesterday, I made a KeyGenMe more hard, when moderators aprovved it, I hope you know to make a keygen for it ;) greats!
konstAnt 15. Oct 2005	Ok..ok I'll try it...I haven't seen coz we were having festival then.... Ok now i'll try.....

RootSec's UTW KeyGenMe

Download UTW_KeyGenMe.zip, 6 kb (password: crackmes.de)
Browse contents of UTW_KeyGenMe.zip

|UTW KeyGenMe|
--------------------

- Written by otromasf

Target:

- Make a keygen
- No patching allowed
- Write a tutorial

Good luck!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 09. Oct, 2005
Downloads: 1041

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Solutions

Solution by Lesco, published 09. oct, 2005; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

Lesco 09. Oct 2005	Lesco 11557500 Now i try to make a keygen
Lesco 09. Oct 2005	solution submitted ;)
bLaCk-eye Moderator 09. Oct 2005	solution aproved :) Take care guys :]
RootSec Author 09. Oct 2005	Good job lesco :D
mushigoya 12. Oct 2005	Can anyone tell why Olly exits when i run this crackme in Olly. (It happens only for this crack), I already unpacked the crackme.
Doodcom 28. Dec 2009	same problem here mushigoya
DigitalAcid 28. Dec 2009	It searches for Olly and when it finds it, it terminates the process (It also searches for IDA as you can see here and some other stuff not shown below): 00402F6F \|. 68 FC234000 PUSH UTW_KeyG.004023FC ; UNICODE "OLLYDBG.EXE" 00402F74 \|. E8 37000000 CALL UTW_KeyG.00402FB0 00402F79 \|. 68 24244000 PUSH UTW_KeyG.00402424 ; UNICODE "idag.exe" 00402F7E \|. E8 2D000000 CALL UTW_KeyG.00402FB0 I usually patch the string to something else :P.

RootSec's UTW KeyGenMe v3

Download UTW_KGMv3.zip, 10 kb (password: crackmes.de)
Browse contents of UTW_KGMv3.zip

|UTW KeyGenMe v3|
------------------------

- Written by otromasf
- More hard that UTW KeyGenMe

Target:

- Make a keygen
- No patching allowed
- Write a tutorial

Good luck!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 12. Oct, 2005
Downloads: 1200

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Solutions

Solution by deroko, published 13. oct, 2005; download (4 kb), password: crackmes.de or browse.

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Solution by Lesco, published 13. oct, 2005; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

Lesco 12. Oct 2005	Lesco 1155710000 Keygen in work ;)
Lesco 12. Oct 2005	Solution submitted ;) i think the rating 4 is a little bit too high
deroko 12. Oct 2005	agree 4 is too high =)
RootSec Author 12. Oct 2005	Hi! I'm a noob and I thought when I did the Keygenme that it isnt too easy, sorry if the level is too high greats!

RootSec's UTW KeyGenMe v4

Download KGMv4.zip, 15 kb (password: crackmes.de)
Browse contents of KGMv4.zip

|UTW KeyGenMe v4|
-----------------------

- Written by otromasf
- More hard that UTW KeyGenMe(v3)

Target:

- Make a keygen
- No patching allowed
- Write a tutorial

------
NOTE: Is possible it doesnt work on SP1 Platforms...
------

Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 15. Nov, 2005
Downloads: 779

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Solutions

Solution by deroko, published 19. nov, 2005; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

RootSec Author 17. Nov 2005	Can anybody resolve it?
deroko 17. Nov 2005	solved, I'll submit tut in 15-20min, just to write it...
RootSec Author 18. Nov 2005	Do you like it deroko? ;)
deroko 19. Nov 2005	it was easy one =)

ror32's Crackme #01

Download r32crkme01.zip, 4 kb (password: crackmes.de)
Browse contents of r32crkme01.zip

The validation algorithm is simple arithmetic.

If you figure out a way to generate a license key for a given user name, then create a keygen and send it to me with the source code. Povided that the keygen works, you will get the source code of this crackme and my keygen!

Rules:
1) No patching
2) No bruteforce

Tasks:
1) Find a license key for your name
2) Create a keygen that generates a license key for any given user name

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 11. Feb, 2011
Downloads: 325

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Solutions

Solution by SFeS, published 23. mar, 2011; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

promix17 12. Feb 2011	Is it real to reverse this algorithm? Especially this part of code: int f1(char* a1) { int result; char* v2; int v3; char v4; v2 = a1; result = 0; while ( 1 ) { v4 = v2; if ( !v2 ) break; v3 = 16 result; if ( v4 < 48 \|\| v4 > 57 ) { if ( v4 < 65 \|\| v4 > 70 ) { if ( v4 < 97 \|\| v4 > 102 ) return -1; result = v3 + v4 - 87; } else { result = v3 + v4 - 55; } } else { result = v3 + v4 - 48; } ++v2; } return result; }
promix17 12. Feb 2011	Or it is possible... I will think more.
ror32 Author 12. Feb 2011	If you see the function in isolation, you cannot make the inverse function because an input and the output of the function don't have a one to one correspondence. But with the range of input values possible in the crackme, you can make the inverse function. Maybe needless to say, the function is only the first step and not the core of the crackme.
SFeS 04. Mar 2011	Add: (value + constant_add) % 2^64 = value_2 reverse if (value_2 < constant_add): value_2 += 2^64 value = (value_2 - constant_add) % 2^64 Mul: (value * constant_mul) % 2^64 = value_2 reverse ?????
KKR_WE_RULE 04. Mar 2011	Well Modular Multiplicative Inverse :)

roticv's Roticv's crackme#1

Download crackme1.zip, 2 kb (password: crackmes.de)
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Roticv's crackme1

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 06. Oct, 2003
Downloads: 2581

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Solutions

Solution by bLaCk-eye, published 12. jun, 2004; download (13 kb), password: crackmes.de or browse.

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Solution by elfz, published 16. oct, 2003; download (3 kb), password: crackmes.de or browse.

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Rouse_'s keygenme 1

Download keygenme.zip, 59 kb (password: crackmes.de)
Browse contents of keygenme.zip

try solve it

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: C/C++

Published: 10. Dec, 2015
Downloads: 254

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Discussion and comments

d0ping 10. Dec 2015	doesnt start vm (xp sp3). or is that a part of challenge?
Rouse_ Author 11. Dec 2015	I forgot about XP support, change field value MajorOperatingSystemVersion and MajorSubsystemVersion in structure _IMAGE_OPTIONAL_HEADER32 (old value 0x0006) new value 0x0005
Rouse_ Author 24. Dec 2015	Just wondering - someone recognized VM main basis?
CrackR 09. Jan, 11:20	You left the text in the keygenme... XD
redoC 16. Feb, 18:43	I wonder who will crack this one.
halsten 08. Mar, 15:29	Way too long, very discouraging to to dive in to given there is nothing intriguing about it from the start. Though, I like Rouse's work in general.

roy's teddybear

Download teddybear.zip, 12 kb (password: crackmes.de)
Browse contents of teddybear.zip

reverse the encryption

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Mar, 2002
Downloads: 1203

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Solutions

Solution by death, published 30. mar, 2002; download (1 kb), password: crackmes.de or browse.

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Solution by j!m, published 30. mar, 2002; download (15 kb), password: crackmes.de or browse.

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Ruev's Lambda KeygenMe

Download rue_lambda_keygenme.zip, 12 kb (password: crackmes.de)
Browse contents of rue_lambda_keygenme.zip

My second KeygenMe, this one is considerably
harder than my first one, coded in C++ using
some C++11 features.

Rules:
[+] Keygen
[-] No Patching

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 06. Oct, 2013
Downloads: 193

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Solutions

Solution by Bargest, published 09. oct, 2013; download (38 kb), password: crackmes.de or browse.

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Discussion and comments

evaboy 08. Oct 2013	This keygenme is not that too hard. Call lsmbada_k 00311d5a checks for the correct serial while Cmp under it checks for the lenghr which must be at least 10 chars. Solution v soon.
Bargest 08. Oct 2013	evaboy, not at all. :) It's much more interesting. function at xxx1d5a (base is random) is smth from iostream rubbish.
evaboy 15. Oct 2013	@Bargest: Wow! You are a good cracker!

Ruev's Rue KeygenMe #1

Download RueKGM.zip, 4 kb (password: crackmes.de)
Browse contents of RueKGM.zip

A simple mathematical KeygenMe.

Rules:
[+] Keygen
[-] No Patching
[-] No Bruteforcing.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 10. Aug, 2010
Downloads: 534

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Stardust, published 17. aug, 2010; download (7 kb), password: crackmes.de or browse.

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Solution by onepatop, published 17. aug, 2010; download (21 kb), password: crackmes.de or browse.

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Solution by redoC, published 17. aug, 2010; download (26 kb), password: crackmes.de or browse.

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Discussion and comments

xbroak 10. Aug 2010	Working on this now, may have a keygen in a few hours if that.
Stardust 17. Aug 2010	Nice Crackme! There exists a lot of "good" serials for the same name. For example: Name "Ruev" with Serial:"5479A0F5D52587473390A9B8942445135775D82D6CD10A9D" or "5073A4F9D92789413699A2B5932643185775D82D6CD10A9D". May be I write a keygen for this.
Ruev Author 19. Aug 2010	Thanks everyone for your tutorials and solutions. Ill be posting a much harder one in the coming days since this was too easy for you.

RUNDLL's CRACKME_1

Download CRACKME_1.zip, 234 kb (password: crackmes.de)
Browse contents of CRACKME_1.zip

Just find the password
This is my first crackme

rules: no patches.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 12. Dec, 2009
Downloads: 1641

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Solutions

Solution by g4hsean, published 19. dec, 2009; download (1 kb), password: crackmes.de or browse.

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Solution by ItsJeezus, published 12. dec, 2009; download (740 b), password: crackmes.de or browse.

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Discussion and comments

sd333221 12. Dec 2009	This is level 2?
dahiphop 13. Dec 2009	"SAHF" What?
_pusher_ 13. Dec 2009	"Store AH Register into FLAGS" ref: http://www.penguin.cz/~literakl/intel/s.html
dahiphop 14. Dec 2009	Difficult to understand
321Kami 23. Dec 2009	how to send sollution?
Maxn 04. Mar 2010	double GetPw() { int v1 = 0; signed __int64 v2 = 4785733294794162176; double v3[100] = { 0 }; do { v3[v1++] = (double )&v2 * 2.0; v3[v1++] = (double )&v2 * 5.0; v3[v1++] = (double )&v2 * 11.0; } while ( v1 < 99 ); v1 = 0; double result = 0.0; do result = result + v3[v1++]; while ( v1 < 99 ); return result; } not too difficult ;)

Ruptor's dec0deme1

Download drcipherdec0deme1.zip, 26 kb (password: crackmes.de)
Browse contents of drcipherdec0deme1.zip

create a working keyfile

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 2206

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Solutions

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Ruptor's dec0deme2

Download drcipherdec0deme2b.zip, 2 kb (password: crackmes.de)
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CRC and Keyfile

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 1782

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Solutions

Solution by RElf, published 15. nov, 2002; download (58 kb), password: crackmes.de or browse.

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rutio's ZerialMe #1

Download 1.zip, 27 kb (password: crackmes.de)
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This is my first KeygenMe.
There are no anti-debug tricks, or obfuscation.
Rules: No patch/bruteforce allowed.
Enjoy.

/Lutio

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 19. May, 2010
Downloads: 326

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Solutions

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Discussion and comments

rutio Author 31. May 2010	No solution guys? Come on! :D
BoRoV 31. May 2010	nope, I know man who brute your crackme :D
Coderess 01. Jun 2010	I know too who brute :)
Coderess 03. Jun 2010	It's crackme cannot be solved - only patch
c0mmunique 06. Jun 2010	This doesn't seem possible without patching. Regardless of what (valid) inputs I plug into it, it seems as though eax and ebp-8 will always contain the same values.
jE! 08. Jun 2010	@ 0040CFE0 are valid input for serial
Coderess 09. Jun 2010	@jE! What that mean?
jE! 09. Jun 2010	i mean at 0040CFE0 are valid chars for serial input.
govule 10. Jun 2010	can make keygen for this but would have to brute the possible serials. "may" be possible to work out non-brute alg. but not worth the hassle. would be interested to see if the writer could make a non-brute keygen himself :)
simonzack Moderator 11. Jun 2010	I bruteforced 00000000..FFFFFFFF there is no valid pass
Coderess 11. Jun 2010	@Rutio correct your crackme and reupload new version
govule 11. Jun 2010	Thanks last two posters for saving me time. I was going to have a go tonight at bruteforce keygen. I did think there was a hell of a lot of XOR'ing so there could probably only be 1 valid serial.
jE! 14. Jun 2010	when proc@004011B0 start, [ebp-2C] is "dirty". i have there pointer: 00403308. then begins hash calculation on this three char: 40\|33\|08. this looks more mistake then trick. (additionally we can overwrite stack by serial-chars.. but dunno..)
jE! 14. Jun 2010	then at same [ebp-2C] will placed Name-chars & there will NO calculation on those. So maybe here things are inversed: Hash-calculation should be after get-Name.
jE! 17. Jun 2010	further, Serial-convertinc proc misses conversion result & stores 01000000 every time. so, if Name hash missed & Serial conversion missed, Keygen is impossible. but it is called "my first KeygenMe" by author. bcoz stack can be overwritten by 28 chars, we can force good message. but 2 chars are non-ascii. so what are thinking Mods?

r-Evolution's Keygenme#2 by the r-Evolution crew

Download Keygenme#2_by_r-Evolution.zip, 125 kb (password: crackmes.de)
Browse contents of Keygenme#2_by_r-Evolution.zip

An easy windows crackme written in C running on the command line

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 04. Nov, 2010
Downloads: 862

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Discussion and comments

r-Evolution Author 04. Nov 2010	because of misunderstood in my last version of the current crackme i give an example to work with ifyou have problems... user: r-Evolution serial: 1128592 good luck~~~~
slackwarshik 05. Nov 2010	r-Evolution: I try user: r-Evolution serial: 1128592 and this serial is invalid. Maube you misprint?
r-Evolution Author 05. Nov 2010	@slackwarshik try to run it through ollydbg or any other debugger-dissasembler
slackwarshik 05. Nov 2010	r-Evolution I try to run it in OllyDbg 1.10 and it still invalid serial.
r-Evolution Author 06. Nov 2010	i really dont know what is wrong it works with me..just try to phish your serial and write a keygen and tutorial don't care about my post
tamaroth Moderator 16. Nov 2010	I think i know what's the problem here. It seems to me that local variables were fucked up somewhere in the process of displaying/gathering information and thus entire checking routine is basically skipped. .text:00401470 cmp [ebp+var_2C], 0Eh .text:00401474 jg short loc_4014A8 .text:004014A8 cmp [ebp+var_30], 0Eh .text:004014AC jg short loc_4014C1 Those two jumps are executed every time without a fail, because the variables they compare contain garbage instead of some value. If you set those values to 0, serial will always be the same, so my next logical guess is that those variables contain length of entered data. Regardless, code is faulty and is not working as intended (unless i missed something very obvious)
r-Evolution Author 16. Nov 2010	@tamaroth i am so happy for figuring out.i honestly apologise
voila 20. Nov 2010	@tamaroth: yup man .. you are absolutely right .. as values are not initalized .. so it is taking garbage value .. but if value is iniitialize ... then it will make serial constant ..
voila 20. Nov 2010	hello again .. well i m little confused .... when i was cracking this crackme.. then i found that serial is in heap of one of the dll (msvcrt.dll) ... so how it is possible .. that serial is not in heap of application.... it is in heap of some dll .. ?? ..
tamaroth Moderator 21. Nov 2010	@voila: my guess is that those variables contain length of the name you enter, so serial changes based on just that, the actual name doesn't realy matter, but that is just my guess, we'd need to see normal code to get proper solution.
deurus 21. Nov 2010	deurus 2017267716
r-Evolution Author 21. Nov 2010	@deurus i am afraid not :(
deurus 21. Nov 2010	me too r-Evolution 1128592 serial invalid
deurus 21. Nov 2010	Ok, there is something wrong because all the good serial for my pc are 2017267716
r-Evolution Author 22. Nov 2010	i really don't know pal.I have some other stuff to do,and idk if i will manage to upload a new version.anyway you can leave it as it is.
Natrium 07. Jun 2012	if found something but it don't do anything with the Username. It's only an math algorithm that returns always the same value. for(int i = 0;i<= 14;i++) { val1 = 15253645 ^ 17372834; val2 = 15253645 / 25; val3 = 17372834 + 65; } for(int i = 0;i<=14;i++) { key = val3+val1+val2; } my key is: 49560691 but it's still wrong
vorhon 20. Apr 2014	@Natrium, same here

r-Evolution's Our first keygenme by r-Evolution crew

Download first_r-Evolution_keygenme#1.zip, 128 kb (password: crackmes.de)
Browse contents of first_r-Evolution_keygenme#1.zip

Very easy windows crackme running on the command line

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 09. Sep, 2010
Downloads: 1256

Rating

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(we have only 2).

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Solutions

Solution by hardbop, published 14. sep, 2010; download (9 kb), password: crackmes.de or browse.

hardbop has not rated this crackme yet.

Solution by ORacLE_nJ, published 14. sep, 2010; download (13 kb), password: crackmes.de or browse.

ORacLE_nJ has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

MRw0rmX 12. Sep 2010	Its sooooo fucking easy LOOL. it took me a few secs with olly ^^
r-Evolution Author 13. Sep 2010	@MRw0rmX Ok!!!I am waitng for your solution.And believe me....More challenges by r-Evolution coming soon :). @freesoul I removed your last comment :/.If you solved it please upload a solution.No offense
MRw0rmX 13. Sep 2010	r-Evolution I've already submitted my solution but it is being analysed by MODS LOOL its so fucking easy. Just search for strings click on the error that is being displayed when wrong serial, then find the JE and fill it with NOPS. Save the cracked version and u are done with it ^^ MY SUGGESTION: Don't display any message when serial is wrong. Use a obfuscator to encrypt strings. It will be much more fucking hard to solve ^^
MRw0rmX 13. Sep 2010	well actually it will be easy anyways LOOL. But for newbies it will be harder.
MRw0rmX 13. Sep 2010	I've upload my crackme. Try to solve it :)
r-Evolution Author 13. Sep 2010	@MRw0rmX Well yes I tried to make it very easy because it is our first crackme.You solved it???I am glad you did.I would really like to analyze the easy ago and write a keygen.Patching is too easy and it's not allowed!! I thnk I 've said that before ,haven't I??I will try your crackme as soon it will be reviewed by the moderators.
MRw0rmX 13. Sep 2010	OK. Patching not allowed?? don you want me to make a keygen? ok I will do it :)
MRw0rmX 13. Sep 2010	lol. I can make a keygen after patching xD. just kiding LOOL
r-Evolution Author 13. Sep 2010	OKP.I am happy you will :P :)
voneiden 13. Sep 2010	I'm curious to see if MRw0rmX can produce a keygen..
MRw0rmX 14. Sep 2010	Why do you think I'm a newbie?uh?
MRw0rmX 14. Sep 2010	Patching: Fill with NOPS in the JE that goes to Invalid Serial Keygen. Username+Ê Very Easy LOOL
vasto 14. Sep 2010	thx for the good explanation @ hardbop and thx for this keygen @ r-Evolution
r-Evolution Author 15. Sep 2010	Well Done guys for the great solutions.I am really happy you solved it :) (Yes I really am).....
r-Evolution Author 15. Sep 2010	I read your solutions1!!How many f@cking :) times am i gonna say it.It was our first keygenme god damn it.We are still teenagers.Do you think we can do much more?????????
r-Evolution Author 15. Sep 2010	Great solution hardbop i am really imressed
r-Evolution Author 15. Sep 2010	:) I mean from your explanation and keygen
hardbop 15. Sep 2010	Thank you, r-Evolution ( & vasto ). I am not new to programming but am fairly new at reversing/cracking. I am going to be spending more time on this site downloading crackmes and trying to learn more & hone my skills.
r-Evolution Author 15. Sep 2010	Well believe me that's what you exactly have to do
ORacLE_nJ 15. Sep 2010	I didnt mean to offend you by making such a short tut.. I didnt have enough time.. "We are still teenagers. Do you think we can do much more????????" Me too...
MRw0rmX 16. Sep 2010	"We are still teenagers. Do you think we can do much more????????" Me too... Me too LOOL
manorhacker 16. Sep 2010	@oracle_nj no no offense!!! :) I told you i am happy you solved it :P
manorhacker 16. Sep 2010	@MRw0rmX :P :) LOL
manorhacker 16. Sep 2010	Well i logged in with my original account!!You might not recognized me.I am one of the r-Evolutions
MRw0rmX 16. Sep 2010	nice. my crackme was cracked by one of the mods (and I used my obfuscator. however he still cracked it :)
MRw0rmX 16. Sep 2010	@manorhacker Man 'm crating a new crack me. And It will be so fucking hard to crack. I got some ideas ^^
r-Evolution Author 17. Sep 2010	I am thinking of creating a keygenme in .net a bit harder algo and an obsfucator as well :)
s0nik42 02. Oct 2010	I'm quite confused, I follow the solution provided above, but when I go to ebp-58, I can't find the string as expected : ->[ebp-58] = 002D2C8C -> Raw Hex Dump -> 002D2C8C 68 61 72 64 62 6F 70 D2 00 AB AB AB AB AB AB AB hardbop-.ΩΩΩΩΩΩΩ but : Stack[0000097C]:0022FF20 var_48 db 0Ch ; DATA XREF: Stack[0000097C]:off_22FCD0o Stack[0000097C]:0022FF20 ; Stack[0000097C]:var_D8o ... Stack[0000097C]:0022FF21 db 26h ; & Stack[0000097C]:0022FF22 db 3Eh ; > Stack[0000097C]:0022FF23 db 0 Stack[0000097C]:0022FF24 db 94h ; ö Stack[0000097C]:0022FF25 db 5Ch ; \ Stack[0000097C]:0022FF26 db 0C3h ; + Stack[0000097C]:0022FF27 db 77h ; w Stack[0000097C]:0022FF28 db 88h ; ê Stack[0000097C]:0022FF29 db 20h Stack[0000097C]:0022FF2A db 0C1h ; - Stack[0000097C]:0022FF2B db 77h ; w Someone can help me ?
r-Evolution Author 02. Oct 2010	@s0nik42 well it looks like you are a newbbie on reversing so let me give you a hint....You have to keep tracing for hours if you want to learn something don follow solutions or ready scripts it is better for you to start with something easy (like this crackme) and do it yourself...You will propable learn something more ;) P.S:Learn assembly if you don't already know friendly, SearcH_AnD_dEstroY
hardbop 04. Oct 2010	s0nik42, ebp-58 in this case is not a quantity, but a reference. Notice that I use the notation, [ebp-58]. In Microsoft/Intel assembly, the "[]" brackets mean de-reference. That is, give me the VALUE located at the address that is the result of the expression between the "[]" characters. In our case, the value stored at ebp-58 is a location in the dynamic heap (which could change every time you execute the program). So take the whatever DWORD (4 bytes) you get from [ebp-58], then look at that memory location to find your string. So according to the runtime dump you printed out in your message, the absolute location of ebp-58 is the stack area address 0x0022FF20. So, jump 4 bytes (starting at 0022FF20) ahead of that address and this gives you the start of the DWORD you want, which is: 0022FF23. Then read backwards (little endian) from there until you get back to 0022FF20 and you get your full 4 byte address: 003E260C In other words: DWORD PTR [ebp-58] = 003E260C Now, take a look at THAT address and see if you don't find your string there.
Xzil0 08. Oct 2010	Hey guys i have 1 question. I opened this crackme in olly, i found piece of code with "Invalid se" string. The question is: Will it be patched if i change the condition? Its giving me: "Yeahp!Well done this is it now make a keygen!" I will try to make the keygen. :D 00401627 . E9 24010000 JMP keygenme.00401750 0040162C > 8D45 A8 LEA EAX,DWORD PTR SS:[EBP-58] 0040162F . 890424 MOV DWORD PTR SS:[ESP],EAX 00401632 . C785 78FFFFFF >MOV DWORD PTR SS:[EBP-88],2 0040163C . E8 EFD80200 CALL keygenme.0042EF30 00401641 80BD 6FFFFFFF >CMP BYTE PTR SS:[EBP-91],0 ; Will this make it patched ---->>> CMP BYTE PTR SS:[EBP-91],1 00401648 . 74 7E JE SHORT keygenme.004016C8 0040164A . C74424 04 1C01 >MOV DWORD PTR SS:[ESP+4],keygenme.004401>; ASCII 0A,"Yeahp!Well" 00401652 . C70424 C033440 >MOV DWORD PTR SS:[ESP],keygenme.004433C0 00401659 . E8 5AAE0300 CALL keygenme.0043C4B8 0040165E . C74424 04 58B2 >MOV DWORD PTR SS:[ESP+4],keygenme.0043B2> 00401666 . 890424 MOV DWORD PTR SS:[ESP],EAX 00401669 . E8 728D0200 CALL keygenme.0042A3E0 0040166E . C70424 4B01440 >MOV DWORD PTR SS:[ESP],keygenme.0044014B ; \|ASCII "PAUSE" 00401675 . E8 26F40000 CALL <JMP.&msvcrt.system> ; \system 0040167A . 8D45 B8 LEA EAX,DWORD PTR SS:[EBP-48] 0040167D . 890424 MOV DWORD PTR SS:[ESP],EAX 00401680 . C785 78FFFFFF >MOV DWORD PTR SS:[EBP-88],3 0040168A . E8 A1D80200 CALL keygenme.0042EF30 0040168F . 8D45 C8 LEA EAX,DWORD PTR SS:[EBP-38] 00401692 . 890424 MOV DWORD PTR SS:[ESP],EAX 00401695 . C785 78FFFFFF >MOV DWORD PTR SS:[EBP-88],4 0040169F . E8 8CD80200 CALL keygenme.0042EF30 004016A4 . 8D45 D8 LEA EAX,DWORD PTR SS:[EBP-28] 004016A7 . 890424 MOV DWORD PTR SS:[ESP],EAX 004016AA . C785 78FFFFFF >MOV DWORD PTR SS:[EBP-88],-1 004016B4 . E8 77D80200 CALL keygenme.0042EF30 004016B9 . C785 70FFFFFF >MOV DWORD PTR SS:[EBP-90],0 004016C3 . E9 27010000 JMP keygenme.004017EF 004016C8 > C74424 04 5401 >MOV DWORD PTR SS:[ESP+4],keygenme.004401>; ASCII 0A,"Invalid se"
r-Evolution Author 28. Oct 2010	@xzil0 i have to tell you that this command: 0040163C . E8 EFD80200 CALL keygenme.0042EF30 is really important....And no more hints :P
r-Evolution Author 28. Oct 2010	@hardpob i told you your solution is great but your keygen has to be analysed in a debugger for someone to get his serial..You have entered return 0; without system("PAUSE"); next time pay attention to that ;)...Anyways i don't count on the keygen......but on how you explain what you do in order to write it!
krankenversicherungsvergleiche 15. Aug 2013	cracked pretty easily, but i don't know the first thing about creating keygens XD. Hopefully I can use this to help learn how to do this because it's supposed to be easy
tinmarino 08. May 2015	Cool, One has to go in the functions, but not all of course, it is interesting. Possible for beginners like me, but a good practice.

s3rh47's KeygenMe-1 s3rh47/TccT

Download KeygenMe-1.zip, 54 kb (password: crackmes.de)
Browse contents of KeygenMe-1.zip

This is my first KeygenMe
Serial must be resolved against name
Md5 is used
Its not packed
Coded in radasm
If the algorithm is solved, then its easy write a keygen.
You need to concentrate to solve the algorithm.
If you dont understand ASM,then you wont find the serial number.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 09. Oct, 2009
Downloads: 999

Rating

Votes: 8
Crackme is nothing special.

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Solutions

Solution by Dionosis, published 17. nov, 2009; download (96 kb), password: crackmes.de or browse.

Dionosis has rated this crackme as quite nice.

Solution by qpt^J, published 17. oct, 2009; download (46 kb), password: crackmes.de or browse.

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Discussion and comments

tony 10. Oct 2009	a little interesting.:)
obnoxious 11. Oct 2009	:) Seems like this one will be a comeback keygen from my side :D
the hoax 11. Oct 2009	Funny crackme. However, you should've disguised your check more, since it can be solved pretty fast by detecting known patterns :)
cobrasniper555 12. Oct 2009	I liked this one. It was fun! =D Short theory on what is happening: A MD5 hash (with modified constants?) is used on the username (+"TccT"). The entered serial has to contain every 3rd WORD in the hash. The numbers from the entered serial are combined with the MD5 hash and summed up. This sum must equal the original hash sum to get a good_boy. Let me know if I'm right, s3rh47! XD -Cobrasniper555 P.S: I'm working on a keygen now.
s3rh47 Author 12. Oct 2009	Congratulations for All Coming 2.KeygenME :D sorry my bad english
Dionosis 17. Oct 2009	ok, I think i own the algo. I'll try to make a tuto+keygen tomorow. Anyway, thanks for this keygenme. :)
sisheng 20. Oct 2009	Thank you for sharing
omeromeromer 22. Oct 2009	hey bro!! we all can do this!! but the prob is with when EXE is packed :(
Dionosis 22. Oct 2009	I have a lot of work to do, that is why I didn't have the time to write a solution and I see that qpt^J has already written one. However he didn't exploit the fact that there are 17.592.186.044.416 different possible serials for one given name. That is why I will try soon to post another little solution.
Dionosis 10. Nov 2009	To moderation : I'm sorry, I uploaded a zip file with the non saved solution. I upload it again.
tarequlcrack 10. Mar 2012	its a good keygenme, thanks s3rh47.

s3rh47's KeygenMe-2 by s3rh47

Download KeygenMe-2_by_s3rh47.zip, 22 kb (password: crackmes.de)
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Find Serial against their name Write a Keygen

No Patching

Not Packed

No Criypto

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 22. Oct, 2009
Downloads: 480

Rating

Waiting for at least 3 votes
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Solutions

Solution by dragonuv, published 25. oct, 2009; download (47 kb), password: crackmes.de or browse.

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Discussion and comments

Dionosis 22. Oct 2009	Ok for me. ^^ Thank you !
z1hye 22. Oct 2009	Names with length of the form 16*k+12 (k=0,1,...) register with any serial :D
z1hye 22. Oct 2009	(any serial of the form XXXXX-XXXXX-XXXXX-XXXXX) where X=alphanumeric char.
-Lord Virus- 23. Oct 2009	great!. I'll try it today.
pxor 24. Oct 2009	name: Pxor Serial: -BADA-SSMOT-HERFU-CKER3 kinda like it...xD

s3rh47's KeygenMe 4 by s3rh47

Download KeygenMe_3_by_s3rh47.zip, 50 kb (password: crackmes.de)
Browse contents of KeygenMe_3_by_s3rh47.zip

Hi all this is my 4. KeygenMe

I will a Keygen

No Criypto and not Packed. coded in RadASM

If your intelligence is good ! Simple for Serial find !

If you follow if is little difficult !

I Lock to Your !

Sorry Bad English !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 10. Aug, 2010
Downloads: 416

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Klaria, published 16. aug, 2010; download (55 kb), password: crackmes.de or browse.

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Solution by RiskyMethodz, published 16. aug, 2010; download (10 kb), password: crackmes.de or browse.

RiskyMethodz has rated this crackme as quite nice.

Solution by onepatop, published 16. aug, 2010; download (4 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Klaria 12. Aug 2010	Hi, I made a keygen.This keygenme is easy, but is pretty to reverse it.
freesoul 16. Aug 2010	Not bad for newbies, however there's a bug. Try to enter 12345612345612345612345- as serial
freesoul 16. Aug 2010	hehe sorry if I'm annoying but you I got a lot of serials for username freesoul ----P8UET2LWPS80G2C9IID6 P8UET-2-LW-P-S80G2C9IID6 ---P8UET2LWPS80G2C9II-D6 .. :D
RiskyMethodz 16. Aug 2010	@freesoul: As I documented in my solution, up to 8 bytes of serial number are effectively ignored. As a result of the logic, there are far more working serials for your username than that, but I won't go into details here to avoid giving unwanted hints or spoilers to future hackers.
freesoul 16. Aug 2010	I see only 4 junkz. hmm hackers? ^^ this is a playground for crackers
RiskyMethodz 16. Aug 2010	If you understood how it works, or if you'd read the note I made in my solution, you might see that there are 8 junk bytes allowable. And, depending on if you choose to use hyphens as 'junk', they can create a very large array of 'valid' serial numbers. For example, the key "P8-UET-2LWPS803THGIID6Q1" is also a valid serial for your username. As is "P8UET2LWPS80--HACK--IID6". Do you really want to grief me over saying "hackers"? In my experience, it's people of the hacker mindset that would find themselves here to learn..."hackers", if you will. If you feel that 'crackers' is more appropriate, that's fine, but don't grief me over the perfectly acceptable use of the term 'hackers'.
freesoul 17. Aug 2010	yes I understood lol xD well "P8UET2LWPS80--HACK--IID6" <- I see only 4 junk bytes I didn't want to grief you sorry, anyway I pm you to stop spamming this ^^
tarequlcrack 10. Mar 2012	very nice keygenme, great for people like me, thanks.

s3rh47's KeygenMe-8 s3rh47

Download KeygenMe8_by_s3rh47.zip, 138 kb (password: crackmes.de)
Browse contents of KeygenMe8_by_s3rh47.zip

KeygenMe is easy , but heads need to run ! such thing as mental game.

If they have solved Serial, please write with HardWare ID or Make a Keygen !!!

No Pack,No Criypto , coded in RadASM

I wish so fun !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 22. Jun, 2010
Downloads: 551

Rating

Votes: 7
Crackme is boring.

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Solutions

Solution by quangredlight, published 25. jun, 2010; download (42 kb), password: crackmes.de or browse.

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Solution by Coderess, published 25. jun, 2010; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

tarequlcrack 10. Mar 2012	nice crack me, thanks brother s3rh47,

s4t4y's easy celen

Download celen.tar.gz, 288 kb

The super easy peazy crackme challenge.

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: Unspecified/other

Published: 12. Jul, 2016
Downloads: 443

Rating

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Solutions

Solution by Maxwell Harley, published 25. aug, 2016; download (839 b), password: crackmes.de or browse.

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Solution by buga0205, published 25. aug, 2016; download (558 b), password: crackmes.de or browse.

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Send a message to s4tan »

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Discussion and comments

meesgroenhuyzen 15. Jul, 19:32	where isthe dl my man??!!!?!?!!??!
blackroserion 23. Aug, 21:05	the_flag_is_arip_power what ???

s4tan's CrackME#1 s4tan

Download CrackMe#1.zip, 6 kb (password: crackmes.de)
Browse contents of CrackMe#1.zip

This .NET crackme implements a simple key generator. The tricky part is to understand the msil code (reflector will not be much usefull) : )

rules:
no patching
no bruteforcing
write a key generator

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 24. May, 2009
Downloads: 504

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by cyclops, published 30. may, 2009; download (14 kb), password: crackmes.de or browse.

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Discussion and comments

MCxCodex 24. May 2009	Congrats s4tan, interesting crackme.
kao 24. May 2009	That's a good one! Really easy but most people will have to learn something new.. ;)
T.0.R.N.A.D.0. 24. May 2009	Nice Crackme ! :)
Filler 24. May 2009	Nice one, hehe. For long time ago, I had the same idea, but I was to lazy and stupid to do it ^^
The So;X 24. May 2009	msil really sucks...Dude :( i tried 15 times to recode k-gen ....
papanyquiL 24. May 2009	You can get the strings of MSIL code using ILDasm
indomit 25. May 2009	Very nice crackme, but key may contain untypable characters. :)
s4tan Author 25. May 2009	Hi guys, i'm glad to know that you enjoyed my crackme. @indomit yes you are right it is my fault, i hadn't done the check :P
Neket110 06. Oct 2012	It took me 20 seconds to crack it. I started cracking .net 2 days ago.

s4tan's s4tanic0de

Download s4tanic0de.zip, 58 kb (password: crackmes.de)
Browse contents of s4tanic0de.zip

This is my second .NET crack-me, I hope you enjoy it : )

Description:
This crackme implements a very basic math function (I think you have more fun in
reversing code than math function :P), the real difficulty is to understand how
the program works.

Tasks:
1. write a tutorial on how the program works
2. write a keygen

Rules:
You can use every tool you want ; )

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 13. Aug, 2009
Downloads: 570

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by cyclops, published 17. aug, 2009; download (74 kb), password: crackmes.de or browse.

cyclops has rated this crackme as quite nice.

Send a message to SacredLamat »

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Discussion and comments

cyclops Moderator 16. Aug 2009	Nice crackme, but can be defeated without much work. Hook JIT, dump IL, write keygen :)
simonzack Moderator 18. Aug 2009	just like to add, for longer names, there will be no valid serial, as the unicode str is compared with the must-be ascii str
s4tan Author 18. Aug 2009	@cyclops well done, you rock :)

SacredLamat's SacredCrackme 5.0

Download SacredCrackme_5.0.zip, 7 kb (password: crackmes.de)
Browse contents of SacredCrackme_5.0.zip

It's my fifth crackme that I wrote in Turbo Pascal. I think it's great for newbies.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 24. Apr, 2005
Downloads: 1536

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Solutions

Solution by Cthulhu, published 01. may, 2005; download (21 kb), password: crackmes.de or browse.

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Solution by Contritus, published 01. may, 2005; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

Saduff's FPU KeygenMe #2

Download FPU_KeygenMe_#2.zip, 203 kb (password: crackmes.de)
Browse contents of FPU_KeygenMe_#2.zip

I present you my second FPU KeygenMe. You may be wondering where's the first one. Well, I decided not to publish it here, because I think it's not as interesting as this one.
The algo may look a bit long at first look, but it's not really. The real stuff is at the end.
There are no cryptos, hashes or anything like that, just pure math. :)

Rules:

- No Patching!
- A Keygen is the only solution.

Good luck and I hope you like it. :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 09. Oct, 2010
Downloads: 460

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by tamaroth, published 15. oct, 2010; download (231 kb), password: crackmes.de or browse.

tamaroth has rated this crackme as quite nice.

Solution by KKR_WE_RULE, published 15. oct, 2010; download (1329 kb), password: crackmes.de or browse.

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Discussion and comments

r-Evolution 08. Oct 2010	Is this obsfucated???
Saduff Author 08. Oct 2010	No, it's not. It's just written using API and not the Delphi IDE.
KKR_WE_RULE 08. Oct 2010	heh- its more clear than normal delphi code i suppose :D
Saduff Author 08. Oct 2010	There is a small problem with the KeygenMe. Due to the differences in regional settings, some will have the decimal separator set as a comma. The KeygenMe supports only dot as the decimal separator. I'm working on fixing this at the moment.
Saduff Author 09. Oct 2010	OK, it shouldn't matter what decimal separator is set in your OS settings now. :)
Xspider 09. Oct 2010	and what about these exception ^o)
KKR_WE_RULE 09. Oct 2010	Some exceptions occur if ya serial format is wrong :) & if ya spend enough time on this , ya will understand, whats the right serial format & shy these exceptions are thrown :) @saduff : can ya handle that exception ? Worth giving a try :)
Xspider 10. Oct 2010	yes that's what i meant it's worth giving a try :)
Saduff Author 10. Oct 2010	Exceptions only occur when your serial format is wrong. I don't care to handle these exceptions. It's your job to find out why it crashes and make a keygen that produces good serials, so it doesn't crash. :) Consider these unhandled exceptions as part of the challenge. If you believe you've found another bug that is not triggered by wrong serial format, then PM me and I'll see what I can do.
KKR_WE_RULE 10. Oct 2010	Good Idea :D Beat it XSP!D3R :)
tamaroth Moderator 11. Oct 2010	name: tamaroth serial: 1P545859-5P069423-N2P67136-N16P6414 kg and tut on it's way
Saduff Author 11. Oct 2010	Well done, tamaroth. Waiting for the keygen. Expecting keygen from others too.
tamaroth Moderator 11. Oct 2010	Solution uploaded (with kg ofc), should be up as soon as mod review it. Was quite nice kgme, cheers!
KKR_WE_RULE 11. Oct 2010	Waiting to see the tut :) Must be interesting :D
tamaroth Moderator 13. Oct 2010	Meh, i did stupid mistake in a keygen and my tut was therefore rejected, fixed it now and reuploaded, should be fine now, but you'll have to wait few more days for the result ;p
KKR_WE_RULE 13. Oct 2010	I've submitted a soln aswell :) Got no response till date :D Waiting to see ya soln :D

Saduff's KeygenMe #1

Download KeygenMe_#1.zip, 266 kb (password: crackmes.de)
Browse contents of KeygenMe_#1.zip

Not really my first KeygenMe ever.

Rules:
No patching! A stand-alone Keygen is the only valid solution!

I hope you like it. :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 21. May, 2010
Downloads: 542

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by BoRoV, published 24. may, 2010; download (269 kb), password: crackmes.de or browse.

BoRoV has rated this crackme as awesome.

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Discussion and comments

BoRoV 22. May 2010	not hard, solved )) soon submit my soution
Saduff Author 22. May 2010	For you nothing is hard. :D But yeah, this isn't difficult.

Saduff's KeygenMe #17

Download KeygenMe_#17.zip, 703 kb (password: crackmes.de)
Browse contents of KeygenMe_#17.zip

This KGM is a result of quite a lot of research, so I hope you'll like it. :)
You'll need to be good with cryptography to solve this.
The difficulty depends on the person solving it.

Accepted solutions: serial, keygen

Good Luck! :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 30. Apr, 2012
Downloads: 524

Rating

Votes: 4
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by tamaroth, published 06. jan, 2015; download (21 kb), password: crackmes.de or browse.

tamaroth has rated this crackme as quite nice.

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Discussion and comments

redoC
14. May 2012

this server is dead !?

tamaroth
Moderator
06. Jan 2015

saitob Author 10. Nov 2007	So how are things going? Someone who has cracked it yet?
Black Anathema 15. Nov 2007	I'm attempting on this one... Don't expect too much because I'm still quite a noob :D
DigitalAcid 16. Nov 2007	I just patched it, much easier. I'm satisfied with that :).
saitob Author 16. Nov 2007	@DigitalAcid: Why don't you try making a keygen. The algo is not that hard:P If you or anyone need hint's ect please send me a PM or mail right away.
HMX0101 16. Nov 2007	Its not harder IMHO... you just need to recognize some algos, if i'm not wrong there's some crc calculation... if you want i can write a keygen and probably a solution :P
saitob Author 16. Nov 2007	Your right HMX0101, there is a crc calculation. It would be nice for a solution =)
DigitalAcid 17. Nov 2007	I just wanted to say that, if I met this in real life, i would simply patch it. I'm not a programmer, so even if I found the algo I wouldn't be able to write a keygen.
saitob Author 18. Nov 2007	@DigitalAcid: Ok, I see... I did not make this crackme hard to pacth tho:P Anyway, I'm glad you tried it out :D
w00b 24. Nov 2007	my solution doesnt work... mods can delete it. i'm embarassed :)
w00b 24. Nov 2007	actually it does but i need to fix it first, so don't approve the first one! haha
rokrz 26. Nov 2007	Easy to patch with FFFF, is the keygen is real? this cd-key seems like do nothing with the key! it just put it somewhere and maybe leave VB do something. I need a solution!
saitob Author 26. Nov 2007	@Rokrz: Yes the crackme is very easy to patch, becauce the point was never to patch it. But there is a serial generating algorithm wich you need to keygen. The algo isn't that hard, and if you need hints, please mail me. Anyway, hoping that someone will solve this one and submit a solution right away.
saitob Author 04. Dec 2007	@w00b: Have you made a solution that woks? If so please submit it. Come one guys, I really need a solution for this one! =)
w00b 04. Dec 2007	i never made a keygen.. just a way of getting valid serials for any name.. sorry to let you down saitob!
HMX0101 05. Dec 2007	keygenning it is easy after you know what's going on... btw, vb suxxx too much code just to make a stupid crc32 calculation =/
KoЯn Rulz 18. Dec 2007	pretty hard also i agree with HMX0101
synak 14. Apr 2010	it is brutal combing through this native compiled vb code... this is old so i don't think anyone would mind me posting a valid key: 55556 55558 538B3 15122

saitob's KeyGenMe!

Download KeyGenMe.zip, 37 kb (password: crackmes.de)
Browse contents of KeyGenMe.zip

Make a keygen for this KeyGenMe!

Some valid License combinations:

License ID: 330067059593
License Key: 4FTL-35HMOP-563TP-IYYHER-GQ6C

License ID: 607830092260
License Key: H3NC-37GOBA-E3FTE-6TQ4MP-E3ZG

License ID: 326157689166
License Key: 3CUA-5AL2VB-TBGA2-ODFEAI-LPPM

License ID: 014602072762
License Key: RMIU-L5AHEA-FP7V4-3B5MH7-I4EG

License ID: 768077427146
License Key: Y5CD-T733TX-TFUNE-6ZGSWV-VEVF

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 16. Aug, 2010
Downloads: 400

Rating

Votes: 3
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

saitob Author 21. Aug 2010	Anyone managed to solve this one yet? And is the difficulty rating correct?
onepatop 21. Aug 2010	Im trying, but its too damn tough, is this the library you used? http://www.di-mgt.com.au/crypto.html#BlowfishVB Did you modify the library?
saitob Author 22. Aug 2010	^ Yes, it's the correct library, and no I have not modified it.
saitob Author 30. Aug 2010	If you guys need any help, please send me a message. This really isn't that hard. And I would really love to see a solution.
sby444 05. Oct 2010	I've figured out how the license ID works, but the license key is harder...

saitob's Mjinhew's Keygenme #1

Download Mjinhew__s_Keygenme_#1.zip, 88 kb (password: crackmes.de)
Browse contents of Mjinhew__s_Keygenme_#1.zip

Mjinhew's keygenme #1
Written in VB6 ~ 07/08/07
Packed: Ofc not!
Level: Don't know really, but would say a 3/10

What to do:
Simply make a keygen that works for every name

What NOT to do:
Patching
Self keygen
etc

Hint: Smartcheck may display a lot of shit, and shit it may be!

Submit your solution to Crackmes.de or send it to tobberg@gmail.com

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 08. Aug, 2007
Downloads: 584

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by ORacLE_nJ, published 13. dec, 2010; download (31 kb), password: crackmes.de or browse.

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Discussion and comments

saitob Author 10. Aug 2007	So i'm just wondering, is it a 3/10 or is it to easy? And if you make it, please submit an solution!
HMX0101 11. Aug 2007	Too easy, after you know 70% of procedures are only junk code... btw, left shifting routine used by MD5 is bugged... please don't think if you use VB it will make your crackme more harder, that's only fantasy ;) I'll be waiting for some really harder coming from you :D

saitob's Saibot's crackme #4

Download Crackme-#4.zip, 12 kb (password: crackmes.de)
Browse contents of Crackme-#4.zip

Well hello again! So I've been looking at some crackme's on this site and I came up with (well I hope) a little treat.
So let's get to the point!

Mission objectives:
-Find a valid serial
-Make a KeyGen
-And as always; Have fun! ;D

Rules:
-No patching

~ Enjoy

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 02. Mar, 2007
Downloads: 390

Rating

Votes: 4
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by MACH4, published 01. oct, 2008; download (40 kb), password: crackmes.de or browse.

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Discussion and comments

saitob Author 03. Mar 2007	If you should discover any bug's in this crackme, please let me know. I will allso wait for a tutorial. Happy Cracking ~ Saibot ;D
Adjiang 05. Mar 2007	Nice CrackMe,saitob ;)
saitob Author 05. Mar 2007	Txn m8! ;D If you solved it, please make a tutorial :P
Adjiang 06. Mar 2007	Your solution has been reviewed by moderator.
saitob Author 09. Mar 2007	Wll, it hasn't comed trough yet. ^^
Adjiang 10. Mar 2007	Saitob,you can get tutorial here : http://www.mediafire.com/?btmm0mgntmm Run test and working all fine for me accept 4 th degree!:) ~Adjiang
saitob Author 11. Mar 2007	I liked your tutorial Adjiang, it was very nice. Gotta laugh when I see how simple it is to crack if you have Reflector :P
Adjiang 11. Mar 2007	Thanks you,mine has been rejected! I just start to make "Cracker Tool" or "sLz Tool for keygenning visual basic or vb.net": Hash,RSA,DSA,Elgamal all in VB.NET that i think better using VB.NET,by the way better than solution asking for floor,ceiling,big number and other sucks ... PM me for that sucks stuff,tq! :( Perhaps one month will be done!Send me your email! I give you free all for vb or .NET programmer for it! : ) Website will be coming yet soon and learn for it! Thanks! Best Regards ~Adjiang or "sLz"
Drakenza 03. Jun 2007	Just uploaded my own solution and tutorial to this crackme (it is still being reviewed by moderators). Haha, I had to resort to decompiling the .NET as well.... just goes to show that microsoft better improve their protection on .NET or no one will ever be able to make commercial shareware in VB.NET. I didn't even have to understand most of the algorithm, I just copied it over and tweaked it.

saitob's Saibot's Crackme #5

Download Crackme5.zip, 8 kb (password: crackmes.de)
Browse contents of Crackme5.zip

Hi again folkz! So I made a challenge for you.

I dont know what else to say about this challenge exept try making it without any patching!

So...

Rules:
-------
No Patching
Enjoy!

And as always, I'll be waiting for a tutorial!

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 20. Mar, 2007
Downloads: 417

Rating

Votes: 6
Crackme is quite bad.

Rate this crackme:

Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

bundy 21. Mar 2007	One of those "Impossible to solve without luck" crackmes. It hashes with MD5 the first line of License.dat file. Then the hash is converted to base64 and compared with fixed string.
boonz 21. Mar 2007	Hmm, it would appear, that MD5 must be brute-forced...
saitob Author 21. Mar 2007	Good luck, Have fun! ;D
boonz 30. Mar 2007	MD5 is a 128-bit hash, so we have 32-digit-Hashes. Each digit can range from 0..f. That should lead us to 16^32 possible hashes. Is this a crackme based on luck or did I miss something? Are we supposed to use Rainbow tables?
bundy 30. Mar 2007	Don't even try to brute-force it. And I really think even Rainbow tables are useless here. Why? I forgot to add before, that the read line is converted to utf16 (unicode) and after that processed with MD5 [example: bundy -> unicode -> 'b',0,'u',0,'n',0,'d',0,'y',0 -> MD5 -> base64 -> compare with fixed string]. There were some "attacks" on MD5 recently, but I don't think any of those could be applied here (as I recall those were only on finding collisions in reasonable time - feel free to correct me). But maybe here, with those 0 chars between all these read chars, some weakness could be found. But I guess this is a task for some cryptoanalyst/cryptographer out there ;)
boonz 31. Mar 2007	Well, the MD5-Hash we are looking for is 2920729e44b4bfa44d07058ec987e2ff I think I'm gonna give the rainbow tables a shot. This will take a while... :)
saitob Author 31. Mar 2007	Emm, yeah, it WILL take time ;D Im sorry this is a boring and hard challenge if you not patch it, but hey, Im only learning, right! ;D

saitob's Saitob's crackme for the very starters.

Download CrackApp1.zip, 13 kb (password: crackmes.de)
Browse contents of CrackApp1.zip

Hello everybody! This will be my first application for this amazing site. I hope that you will enjoy playing with my program and cracking it.

~ Saitob

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 25. Feb, 2007
Downloads: 1067

Rating

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Solutions

Solution by boonz, published 05. mar, 2007; download (2 kb), password: crackmes.de or browse.

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Solution by Ki11Roy, published 05. mar, 2007; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

saitob Author 07. Jul 2007	Bloddy daim easy, I know :)

saitob's (VB) Crackme#2_by_Mjinhew

Download (VB)_Crackme#2_by_Mjinhew.zip, 26 kb (password: crackmes.de)
Browse contents of (VB)_Crackme#2_by_Mjinhew.zip

Crackme#2 by Mjinhew
Language : Visual Basic .NET
Main Class: Approximately 140 lines of code
Tested on : Microsoft Windows XP (SP2)
-----------------------------------------------------

NOTE: REQUIRES THE DOT NET FRAMEWORK.
-----------------------------------------------------

Mission:
Bad: Find a valid serial
Not that bad: Make a keygen
Good: Make a keygen in a non framework based environment
THE VERY BEST: Make a keygen in a non framework based environment
+ a tutorial

Hint: It's created 10 serials for your System ID where only 1 is correct. Remember that in your keygen ;)

Send your solution to tobberg@gmail.com or to crackmes.de
-----------------------------------------------------

Happy Cracking

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 26. Jul, 2007
Downloads: 586

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by halsten, published 01. aug, 2007; download (77 kb), password: crackmes.de or browse.

halsten has rated this crackme as boring.

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Discussion and comments

saitob Author 27. Jul 2007	Ok, so there is a zip-file with a working keygen. I included the file because I didn't remember exactly how the algorithm worked when I was submiting it to this site, so it was basicly just to show the admin that the crackme works. Anyway if you manage to crack my crackme, you may request the password =) Happy Cracking!
ChupaChu 28. Jul 2007	Please send a link to working keygen. It has been removed from .zip you send.
saitob Author 29. Jul 2007	Ok, so I've uploaded a working keyGen. You can find it here: hxxp://files.filefront.com/VB+Crackme2+by+Mjinhew+KENzip/;8173618;;/fileinfo.html It's password protected so you'll have to send me at least 1 working serial to your System ID + the hidden char. If you don't manage to crack the app, but still want to see the keyGen. Include that in your message.
halsten 01. Aug 2007	Good: Make a keygen in a non framework based environment THE VERY BEST: Make a keygen in a non framework based environment Contradicting yourself there, eh? :þ
halsten 01. Aug 2007	"It's created 10 serials for your System ID where only 1 is correct" I don't understand your English.
halsten 01. Aug 2007	Nevermind, solved anyways. :)
saitob Author 01. Aug 2007	Good! Halsten! What about a tutorial? That would be great. Btw: Sorry for my English xD
saitob Author 01. Aug 2007	RE: "It's created 10 serials for your System ID where only 1 is correct" I don't understand your English. If you take 5 mins of your time, to study the algo, you'll know what I mean :) And THE VERY BEST is if you can make the keygen in a non framework based environment PLUS a tutorial. :) But hey, thankes for commenting! Best regards, Mjinhew
halsten 01. Aug 2007	Yeah, I uploaded a solution.
saitob Author 03. Aug 2007	Nice tutorial halsten, the problem is that your keygen can dispay 100++ invalid serials. If you study my crackme a bit you should see that you can make a keygen wich generates only 10 serials, where the correct serial will be located.

Salar's Chaloia

Download Chaloia.zip, 17 kb (password: crackmes.de)
Browse contents of Chaloia.zip

My First KeygenMe. So it's proably very easy.
Written in C++.
Rulez:
1. Do NOT make a patch.
2. Make a Keygen (not a selfkeygen).
3. Make a video tutorial and post the solution.
4. Have fun.

The zip contains a keygen. Password is pass for user Meow.
Passwords are a bit weird... But you can make it.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 12. Jul, 2016
Downloads: 786

Rating

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Solutions

Solution by xXTurdhunterXx, published 20. oct, 2016; download (3 kb), password: crackmes.de or browse.

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Solution by AnonymousKid, published 25. aug, 2016; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

chocolate 13. Jul, 20:34	I have tried to run this executable several times and I keep getting the error of The program can't start because MSVCP100D.dll is missing from your computer. Try reinstalling the program to fix this problem. I have VS installed fine and all my debug projects run just fine. Not entirely sure if it's the executable you submitted.
metacube 14. Jul, 01:33	I've faced the same problem
TomwithM 14. Jul, 03:13	I have some problem.0x21+0x65>0x7F. How to keygen it????
TomwithM 14. Jul, 03:15	the name is everyting,but the pass is null(0x00)??
redoC 15. Jul, 17:32	probably bugged crackme ? generated passwords are out of asci range, beside this you use movsx to char expansion so you compare 'char values' like 0xFFFFFFC6, or is this all intentional?
Seprum 18. Jul, 17:10	redoC, I noticed it too. But I am completely new in cracking so I thought it's some kind of protection and wasted more than 5 hours analyzing it. So is it bugged or not?
UltraM4N 24. Jul, 18:34	for missing dll visit: https://www.dll-files.com/msvcr100d.dll.html
BadNiiw 26. Jul, 21:30	Download dll from http://www.telecharger-dll.fr/download/Chaloia.zip.php?dll=msvcr100d.dll and put in in same folder as Chaloia.exe ;)
xXTurdhunterXx 07. Aug, 15:25	@redoC This also stumped me for a while, but I found out that movesx extends the MSB of a byte. So if we have 0111, it won't extend it to say 1111 0111. But something like 1000 would be extended to 1111 1000. As far as the crackme, I did come up with a solution but I am having quite a hard time copying the extended ascii characters to clipboard or trying to enter them. Here is psudo code for my solution: add_char = 'e' password = "" for c in characters password += ((c - 30) + div_by_char) + 0x30 add_char = c The algorithm looks like it uses modulus...but from one of the names I tested it only was accepted without it... password += (((c - 30) + div_by_char) % 0x7A) + 0x30. My solution probably doesn't work with all strings. I just gave up since entering extended ascii is hard :( I ended up using a website to copy and paste extended ascii characters: http://www.theasciicode.com.ar/extended-ascii-code/letter-a-ring-ascii-code-134.html For example !!!! coresponds to åBBB.
xXTurdhunterXx 07. Aug, 15:27	Sorry there are errors in my comment: div_by_char should be add_char and c - 30 should be c - 0x30
shikata.ga.nai 14. Aug, 02:55	@Seprum, most likely it's bugged. I came out with solution similar to @xXTurdhunterXx's, but it works from time to time. If, like @xXTurdhunterXx wrote down, my function for !!! returns åBB for password and crackme accepts it, same function for aaa input returns LHH as password, but now it's somehow not accepted by the crackme.
shikata.ga.nai 14. Aug, 02:58	It's interesting though where is the bug. Couldn't identify bug in comparison function with IDA decompiler though.
beaver 24. Aug, 11:11	void Checksumm(char * name, char * checksumm, int lenght) { char e = 'e', b = 0, x = 0, z = 0, a = 0; if (name[0] == 0) return false; for (int i = 0; i < lenght; i++) { b = name[i]; b -= 48; checksumm[i] = b; x = checksumm[i]; x += e; checksumm[i] = x; e = name[i]; z = checksumm[i]; z = z % 122; checksumm[i] = z; a = checksumm[i]; a += 48; checksumm[i] = a; } checksumm[lenght] = '\0'; }
Salar Author 12. Sep, 11:42	Sorry for being inactive for a while. Non-ascii pass is perfectly correct. Keep it on!
Salar Author 12. Sep, 11:45	Is there a way to remove solutions? Rules state that you should not patch!
Salar Author 12. Sep, 11:51	i also like how you got that complicated stuff. Cant dig up my code. But it was like 5 loc.
xXTurdhunterXx 13. Sep, 04:04	I submitted my fully working solution 3 weeks ago but it hasn't been approved by mods...why?
Barkhat 22. Sep, 17:23	Salar, what code table you used?
Salar Author 24. Sep, 14:19	@Barkhat what do you mean by code table?
Barkhat 02. Oct, 13:47	@Salar What code page is used in your CMD?
Bakasura 09. Nov, 05:16	@SalarI have the keygen, but the console alters the string. Any suggestions? var User: String; Serial, Seed, Tmp, I: ShortInt; begin Seed := $65; User := TxtName.Text; TxtSerial.Clear; for I := 1 to Length(User) do begin Serial := 0; Serial := Serial + ShortInt(User[I]) - $30; Serial := Serial + Seed; Serial := Serial mod $7A; Serial := Serial + $30; Seed := Integer(User[I]); TxtSerial.Text := TxtSerial.Text + Chr(Byte(Serial)); end; end;
Salar Author 19. Nov, 12:53	@Barkhat I'm using 850 (Latin1 I guess).

Salazan's Light keygenme

Download light.zip, 219 kb (password: crackmes.de)
Browse contents of light.zip

Light keygenme

Rules:
1) Try to keygen it... less then in ten minutes :)
2) Submit your solution

Thank's.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 30. Jan, 2009
Downloads: 619

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by br0ken, published 10. feb, 2009; download (274 kb), password: crackmes.de or browse.

br0ken has rated this crackme as awesome.

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Discussion and comments

freesoul 30. Jan 2009	lol I don't even know how I've did it.. First download... I put some chars and: Serial 5656 is ok xD 5645:5656
Salazan Author 30. Jan 2009	>Difficulty: 2 - Needs a little brain (_or luck_) freesoul, you are lucky :)
br0ken 01. Feb 2009	I think brute forcing is required. Am I correct?
fool 01. Feb 2009	just keep putting chars, the serial will be ok:)
Salazan Author 01. Feb 2009	br0ken, good job! Algo is correct. Now, try to write keygen that will generate correct serial. It's my mistake, I do not understand you correctly.
br0ken 01. Feb 2009	@Salazan: Thank you! Today I managed to solve my first ever crypto crackme! (however simple it may be). Bruter is finished and it works fine :D
andrewl.us Moderator 01. Feb 2009	Congrats br0ken, keep up the good work :)
andrewl.us Moderator 01. Feb 2009	(assuming a solution is inbound :))
Salazan Author 01. Feb 2009	br0ken, my congratulations :) Don't forget to submit your solution ;)

Salazan's Salazan's KeyGenMe! # 0001

Download SalazanKeygenMe0001.zip, 222 kb (password: crackmes.de)
Browse contents of SalazanKeygenMe0001.zip

It's my first keygenme. I think, it's very simply. Try to write keygen. Good luck!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 09. Sep, 2005
Downloads: 894

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Solutions

Solution by Ox87k, published 09. sep, 2005; download (57 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 09. Sep 2005	i keygen it but... the name??? the name was get only for check the len! right? I submit my keygen with little tute.. i hope is correct! bye!
Salazan Author 09. Sep 2005	Good job! You keygen works correctly!
Ox87k 09. Sep 2005	thanks! nice job for keygenme, it's more funny! :D
Salazan Author 10. Sep 2005	It's crack4fun =)
Shism 11. Sep 2005	Hope everyone tries mine out ... Which I hope is published soon ...

Salazan's Salazan's KeyGenMe! # 0003

Download salazan_keygenme_0003.zip, 266 kb (password: crackmes.de)
Browse contents of salazan_keygenme_0003.zip

Simply KeyGenMe. If you have some free minutes, i recommend you to download it =))

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 12. Sep, 2005
Downloads: 992

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Solutions

Solution by NoRG, published 13. sep, 2005; download (160 kb), password: crackmes.de or browse.

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Discussion and comments

Salazan Author 14. Sep 2005	Good job, NoRG!

samfisher9000's sam's crackme#2

Download samcrackme2.zip, 206 kb (password: crackmes.de)
Browse contents of samcrackme2.zip

yay, crackme#2 is out. keygen this and write a solution. of course, no patching. above all, have fun! yeah i know i promised a c++ one this time, my bad got lazy again.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 30. Jul, 2005
Downloads: 920

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Solutions

Solution by warrantyVoider, published 31. jul, 2005; download (73 kb), password: crackmes.de or browse.

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Discussion and comments

TQN 31. Jul 2005	Hi samfisher9000 ! Why did your crackme include the keygen itself. Maximize or resize the form to show the keygen part (Edit3, Edit4, Keygen button), enter the name in Edit3, press Keygen, the real serial will showed in Edit4. Is it your bug ???

samfisher9000's sam's keygenme

Download crackme3.zip, 5 kb (password: crackmes.de)
Browse contents of crackme3.zip

just a quick keygenme. i know it's VB don't sue me, i got lazy. i'll make a couple c++ ones later

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 18. Jul, 2005
Downloads: 703

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Solutions

Solution by EsKiMo, published 05. aug, 2005; download (9 kb), password: crackmes.de or browse.

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redoC 21. Aug 2014	redoC:5349827601 no need any x86 knowledge, easy and funny crackme
Rad01 24. Aug 2014	do you want a keygen without writing solution? because i'm bad in english. here some keys: San01suke = 0761954382 crackmes.de = 2937601548 Rad01 = 5348927601 . .

san01suke's SomeCrypto~4

Download SomeCrypto#4.zip, 52 kb (password: crackmes.de)
Browse contents of SomeCrypto#4.zip

Just find correct password.

Post comment with good boy message as evidence of solving this.

Some crypto knowledge never hurt anyone.

P.S. Stupid bruteforce is not good solution.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 20. Oct, 2016
Downloads: 102

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Solutions

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Discussion and comments

acruel 25. Oct, 22:50	hmm S-box applied 129 times during encryption

santmat's canyou

Download santmat_canyou.zip, 12 kb (password: crackmes.de)
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name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Aug, 2001
Downloads: 1625

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by alf, published 30. aug, 2001; download (2 kb), password: crackmes.de or browse.

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Solution by sushi, published 30. aug, 2001; download (191 kb), password: crackmes.de or browse.

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Send a message to sarkar112 »

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Discussion and comments

sarkar112's SrkNewbCrkMe1

Download SrkNewbCrkMe.zip, 6 kb (password: crackmes.de)
Browse contents of SrkNewbCrkMe.zip

This is a very simple crackme, it's for
very unexpirienced users, YOU MUST MANUALLY UNPACK THIS,
read the readme inside the .zip file.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 01. Mar, 2006
Downloads: 1327

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Solutions

Solution by TWiST, published 09. mar, 2006; download (2 kb), password: crackmes.de or browse.

TWiST has rated this crackme as boring.

Solution by Ank83, published 09. mar, 2006; download (1 kb), password: crackmes.de or browse.

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Solution by HMX0101, published 03. mar, 2006; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 01. Mar 2006	very very easy, the serial is... easy to fish... sarkar112, congratulations for the crackme
l0calh0st 01. Mar 2006	Only thing that can trouble somebody very new to art is how to use that serial..:) and manual unpacking.....:)
HMX0101 01. Mar 2006	l0calh0st: yeah, that's right XD
HMX0101 02. Mar 2006	i has submitted my solution...
OuTiMe 02. Mar 2006	I submitted the solutions yesterday, and I'm waiting to show here.
HMX0101 02. Mar 2006	the crackme can be solved without unpack...
blehjutsu 02. Mar 2006	as HMX said... super easy fish
HMX0101 03. Mar 2006	i has called to this the "upx effect" :D
sarkar112 Author 03. Mar 2006	HMX thanks for the solution
HMX0101 03. Mar 2006	thank you, and i can wait for the next crackme :D
TWiST 05. Mar 2006	Thanks for this nice crackme for newbies like me ;).
Am0k 05. Mar 2006	easy to find the password, but a good crackme for starting noobs like me :)

|sas0|'s .NET Anarchy

Download NET_Anarchy.zip, 4 kb (password: crackmes.de)
Browse contents of NET_Anarchy.zip

My first .NET crackme, maybe a little bit different from others ;)

Rules: Calculate the serial and/or make a keygen, patching is trivial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 15. Sep, 2010
Downloads: 376

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Solutions

Solution by Holy, published 21. sep, 2010; download (197 kb), password: crackmes.de or browse.

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Discussion and comments

kao 17. Sep 2010	Finally something original! :) Nice work!
\|sas0\| Author 17. Sep 2010	Thanks, I hope it is interesting ;)
The So;X 22. Sep 2010	@\|sas0\| good Work :) @Holy nice and detail solution man,
bower 26. Dec 2010	Actually you don't have to bruteforce num or num4. Calculate num:((0x8b8d5dd5 ^ num) + 1) == 0 10001011100011010101110111010101 //bin(0x8b8d5dd5) xor num = 11111111111111111111111111111111 //=-1 num = ~(0x8b8d5dd5) = 01110100011100101010001000101010 Now that we have num, we can calculate num4 as the loop above just reverses the binary string of num4 and stores it in num. num = 01110100011100101010001000101010 num4 = reverse(num) = 01010100010001010100111000101110 = 0x54454E2E => "TEN." So the first block of the serial must be ".NET"

|sas0|'s crackme

Download crackME.zip, 1 kb (password: crackmes.de)
Browse contents of crackME.zip

The third crackme

- no patching please
- find the right code and/or code keygen/loader

Have fun

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: Assembler

Published: 12. Oct, 2005
Downloads: 497

Rating

Votes: 3
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

NoRG 12. Oct 2005	sas0, I see data for checking generates with every time with random timer values. Or exists some hidden correlation? :)
\|sas0\| Author 13. Oct 2005	If you carefully watch this "random" data you'll see that some bytes of data are evrytime almost the same I think that there is no hidden correlation but I think that it can be predictable from algo which is "random" generated...or you can code loader/dumper to dump this data and calculate serial from it
NoRG 15. Oct 2005	I don't think so. I've dumped blocks few times and them is different everytime. I can calculate serial for current run, but on next run it is not valid. Maybe here need pure DOS, who knows, I run under WINXPsp2 with TD and TR. Anyway, I want look at keygen. I think it's not possible without ask code. Patch is right and fast solution :)
\|sas0\| Author 18. Oct 2005	If you run it under debuger then there is a big posibility that it will be totaly different evry time...try to patch the prog so that it shows data on screen..you'll see that without a debuger some parts of data are almost evrytime the same
\|sas0\| Author 18. Oct 2005	...and yes the crackme was tested under win9x and win2000 so I'm not sure if it acts different under XP....try to make self-keygen instead :) patch is too easy
pants 29. Dec 2005	I have to agree with NoRG - this appears to be an odd crackme, unless we're both missing something very obvious. Easy to create self-keygen (or loader) - but for what purpose? Patch in this case is equally valid due to randomness of the init vector. Still, nice to see a DOS crackme - thanks \|sas0\| :)
\|sas0\| Author 29. Dec 2005	Thanks pants....well I gues I fucked up this crackme a little bit :) thanks anyway to try this crackme....next crackme I hope it will be more difficulty and chalenging then this one....anyway happy new year folks
pants 29. Dec 2005	Don't be so hard on yourself - other than the randomness of the timer it had the makings of an interesting crackme! I'm very intrigued though - you say there is little change in the timer results on your system? This is interesting... Anything special about your system that would produce so little timer variance? You seem familiar with the traditional usage of such code (and probably realise the implications of low timer variance on them...) Anyway - thanks again and keep them coming :)

|sas0|'s crackmeRTDSC

Download crackmeRTDSC.zip, 737 b (password: crackmes.de)
Browse contents of crackmeRTDSC.zip

crackme for DOS, password protection, no patching please"

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: Assembler

Published: 17. May, 2005
Downloads: 1281

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by red477, published 27. may, 2005; download (2 kb), password: crackmes.de or browse.

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Solution by strelok, published 19. may, 2005; download (2 kb), password: crackmes.de or browse.

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Solution by thehyper, published 24. may, 2005; download (22 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

1899 18. May 2005	nice one m8! keep 'em coming
\|sas0\| Author 19. May 2005	I'm glad that you like it when I'll have some time and some new idea I'll code another one :) have fun
strelok 19. May 2005	really nice idea, waiting for more!
\|sas0\| Author 20. May 2005	strelok: Good solution and you're right on other processors there will probably be another vaule, I even try on other windows (win98,2000) and the value is changed, I think it depends on NMI interrupts too...
东方介 29. Sep 2008	it doesn't work in my debuger. disasm it. OH,I have to make a keymaker ! hoho.
\|sas0\| Author 01. Oct 2008	The whole point of this crackme is that it work different if it is run in debugger check on the internet for "RDTSC" instruction and you'll see what i mean ;)
falcon_1 27. Dec 2015	what;s this dseg:0000 00000060 C A43589734022345KSFGNRRRZ6346347457z234576782bniDF4366236888335t945635285826PASDFN6345539485810\t

|sas0|'s patchIT

Download patchIT.zip, 792 b (password: crackmes.de)
Browse contents of patchIT.zip

Another DOS crackme....this time it's time for some patching :)""

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: Assembler

Published: 09. Jun, 2005
Downloads: 1016

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Solutions

Solution by bi0w0rM, published 24. jun, 2005; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

code_inside 05. Jun 2005	There are multiple ways of patching this CrackMe. One way is a bit more difficult (And I think this was the way you meant it to be patched :) ). But there's also a much easier way of patching the CrackMe and I think you overlooked that... :) I'm not going in further detail because it could spoil the fun for someone else, but I just wanted to say this :)
\|sas0\| Author 06. Jun 2005	Yes you're right I overlooked one way to patch this god I'm stupid :) yea well I'll probably submit fixed version of this crackme if I'll have some time to fix it. Thanks a lot code_inside
Oorja-HalT 06. Jun 2005	I wish you would have paid as much attention to last string printing as you did for the intial string. That would have sure made it more intresting. The offending byte sems to stare at you face telling you : oh comeon just patch me . Btw i am still puzzled as to why the good job string dont have a line break like wrong message. Any idea code_inside
code_inside 06. Jun 2005	Hi Oorja-HalT, I don't see a problem with both strings, they are both terminated with the $ character :) There's also nothing wrong with the code which is printing the strings. Or do you mean something else?
\|sas0\| Author 06. Jun 2005	I don't see the problem neither the good msg have "new line" chars (13,10) and yea I'll make it a little bit more interesting in next "version" of this lame crackme and I'll fix the "little" problem that code_inside point it out :)
Oorja-HalT 06. Jun 2005	What i meant is the bad message starts in a new line Whereas the good message continues in the same line .ie press any key to continue. Maybe this line doesnt have the termination chars.I think i will have any other look sometime
DLAP 07. Jun 2005	Do I need to send you solution?
\|sas0\| Author 08. Jun 2005	DLAP: If you wish you can send me your solution on my email I would like to see if you figured out the easy way to patch it :)
\|sas0\| Author 10. Jun 2005	this crackme is updated there is no big difference just a little fix that code_inside point it out :)
DLAP 12. Jun 2005	I solved it :) it wasn't very divicult, but i have to use much paper :)
\|sas0\| Author 13. Jun 2005	DLAP: I told you that it isn't hard :) paper is always useable when you crack apps :)

|sas0|'s TheGame

Download TheGame.zip, 10 kb (password: crackmes.de)
Browse contents of TheGame.zip

Second .NET crackme, enjoy the game ;)

Rules: no rules

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 27. Nov, 2012
Downloads: 509

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Solutions

Solution by ReWolf, published 14. feb, 2013; download (63 kb), password: crackmes.de or browse.

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Discussion and comments

ReWolf 04. Feb 2013	Keygen sent to the author, solution under way.
ReWolf 12. Feb 2013	Solution is now online: http://blog.rewolf.pl/blog/?p=502 (keygen + PDF print of the blog post was submited here)

|sas0|'s w32crackme1

Download w32crackme.zip, 3 kb (password: crackmes.de)
Browse contents of w32crackme.zip

Helo...my first win32 crackme...goal is to find out serial that will correctly decode "good msg" and show it in Status

Have fun

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 21. Sep, 2006
Downloads: 564

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Solutions

Solution by ty123, published 01. jan, 2007; download (100 kb), password: crackmes.de or browse.

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Discussion and comments

geeko 22. Sep 2006	u are out of your mind! the algo is too long and complicated. It's not worth to reverse. It does to checks: 1 for first 4 chars and then for last 4 chars. Self generating code! ugly. It took me a day just to step into the algo till the end. IS not very very hard, but is very long.I gave up.
\|sas0\| Author 22. Sep 2006	It's not that hard as it look like.Algo is rather long,but if you analize the code you'll see that there are about 5 or 6 checks...so If you want to crack it just study evry check for itself :)...yea well...I include smc just to make a bit harder to analize :)
l0calh0st 22. Sep 2006	Good work m8....Analysing now :)
geeko 25. Sep 2006	u said to find the serial, not to patch, right?
\|sas0\| Author 25. Sep 2006	If you patch the code where it checks if the entered password is correct you won't do any good becouse "good message" is encrypted with "password" and with bytes that indicates that password is correct...decryption algo isn't hard...you can ofcourse manualy enter some good text in crackme and then display it but I think that is not the goal of the crackme :)
ty123 15. Dec 2006	@\|sas0\| plz confirm the following DW (BCED5428h) is correct. Thanks! 004012F1 > 35 2854EDBC XOR EAX,BCED5428 I would rate this crackme as 4/10. You will know the reason from my solution.
\|sas0\| Author 15. Dec 2006	Yep ty123 0xBCED5428 is right dword so the eax == 0 You're on the right track :)

SasaMaker's CrackMe#1 By:SasaMaker

Download Crackerme1.zip, 6 kb (password: crackmes.de)
Browse contents of Crackerme1.zip

Disable The Anti-Debuger And Find The S/n(Serial Name Maybe?)
And/Or
Disable The Anti-Debuger And Patch It!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 03. Apr, 2006
Downloads: 837

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by SoN, published 20. apr, 2006; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 03. Apr 2006	The harder of the crackme is disable the antidebugger because the serial is hardcoded but its only has a serial for all the names...
astigmata 04. Apr 2006	unsolved, lol not really hard, look in the stack SasaMaker, are you a Romanian ?
HMX0101 04. Apr 2006	look in the stack window after the call to __vbaVarTstEq :D
SasaMaker Author 10. Apr 2006	Im Not By Serial Name I Ment That It Had A Meening Not A Random String And Has Any One Completed Dis Crack Me? Should I Have Set The Diff. Higher?
SoN 20. Apr 2006	I thought this crackme was extremely simple. Only took about 1 minute to kill the anti-debugger. Took another 10 seconds to patch it.
SasaMaker Author 22. Apr 2006	"I thought this crackme was extremely simple." Thought Or Knew? Well, I As I May Quote: "Nothing Good Happens When YOU Think" - My Older Sister All-Well, Congrats! You Get Ah Cookie! (;:) I Didn't Think It Was Too Easy, Wait Till My Next One Is Complete!
SoN 22. Apr 2006	Im looking foward to the challenge SasaMaker.

SasaMaker's OmG mY sErIal Iz DoOd V2

Download OmGmYsErIalIzDoOd.zip, 5 kb (password: crackmes.de)
Browse contents of OmGmYsErIalIzDoOd.zip

Im BACK!
Latly Ive Been Owned By School And Other Hobbys
BUT
The Mission Is To:
Enable The Register Button
Make A Keygen

OR

Enable The Register Button
Patch It To Accept Any Serial

Its Some What Of A Math Using Len And Stuff

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 04. Jul, 2006
Downloads: 779

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by El_PuPaZzArO, published 12. jul, 2006; download (9 kb), password: crackmes.de or browse.

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Solution by didnie, published 10. jul, 2006; download (145 kb), password: crackmes.de or browse.

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Solution by The french beginner, published 10. jul, 2006; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

The french beginner 04. Jul 2006	i've owned it! i write my solution (verry simple...)
SaXoN 04. Jul 2006	I've never really undestood how it makes that grayout button but its obviosly some kinda API or import or whatever it's called. Can somebody give me a hint? Im quite sure im capable of patching it afterwards =D saxx
SasaMaker Author 04. Jul 2006	See Zairon? It Does Work And To Enable The Button, Use A Hex Editor I Made This One About A Month And A Half After My First One Very Simple, If You Complete It, And Send A Solution In And YOU Ask For Teh Source, I Wil Send It For You Haha, If You Use Smart Check, It Is WAY To Easy
The french beginner 04. Jul 2006	thats exactly what I did... I sent my solution this afternoon, I wait its approbation
ind0r 04. Jul 2006	It's really easy! I don't know how to enable it by Olly (coz I'm kind of newbie) but I used VeoVeo (v3.4) to the button. The rest is just to modify this address 004032DC (JE 0040348F) to NOP. The progam checks if your last name has at least 5 letters but it can be skip too (00402C8C). Have a luck!
SasaMaker Author 04. Jul 2006	Well If You Can Nop The Check On The Phone Number Some How, And Have It As Like (000)000-0000 THEN Your Serial Whould Be 0 Well, Did Any One REALY Crack It? Or Just Patch It? B/c Zairon Said It Didnt Work, I Did It, And It Worked Just Fine
The french beginner 05. Jul 2006	I found that the serial "0" always works what do you mean in REALLY?? I have patched it and found a good serial : "0" isn't it enough?? is there anything to do??
SasaMaker Author 05. Jul 2006	Um Made A Keygen
SasaMaker Author 05. Jul 2006	"0"? After Patching Or B/4?
The french beginner 05. Jul 2006	the only patch i did is the activation of the button nothing else? is there a problem somewhere??
The french beginner 05. Jul 2006	I just tried with lots of names/phone numbers "0" always works
SaXoN 05. Jul 2006	Just succeded; easier than i thought :D The serial calc was far too hard for me so i just enabled the button and patched some JMP/JE/JNZ operations and wolla ;D I dont know if i should write a tut, i feel like i've not done it properly like a keygen would have been :\ SaAx
El_PuPaZzArO 06. Jul 2006	I have write and send a tutorial for "Enable The Register Button and Patch It To Accept Any Serial".. This is my first tut.. Bye...
SasaMaker Author 06. Jul 2006	:) Try My First One, I Think Its A Lil' Harder Thx Y'all For Not Uh- Teasing Me For It Not Being Good
El_PuPaZzArO 06. Jul 2006	I can't to make a keygen for no program with my current acquaintances, in fact I have opted for the second possibility. I will study a language to learn to make them. However i think that my solution is right. Sorry for my english :P
El_PuPaZzArO 06. Jul 2006	Excuse me but in the sended solution I forgotten to attach the cracked program. I have uploaded it on rapidshare with password. I have sended the password in pm to SasaMaker. Link to rapidshare: http://rapidshare.de/files/25123137/Challange2CrackedByEl_PuPaZzArO.rar.html
SasaMaker Author 07. Jul 2006	Uh, Send It To A Mod Or Some One With Uh, Higher Authoritys

Sashx41's AntiOlly #1

Download AntiOlly.zip, 6 kb (password: crackmes.de)
Browse contents of AntiOlly.zip

Let this small app work fine(!) with Ollydbg. Do not change any jumpcommands, patch the code as less as you can to lead it to the good message.

There are 4 antidebug/-olly "methods". (Some are easy, some are hard)

Please explain the methods in your solution.

ADDENDUM: installation of visual c++ redistributable package is required on some machines for this crackme to run

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 17. Jan, 2009
Downloads: 402

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Solutions

Solution by macduff, published 19. feb, 2009; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

br0ken 19. Jan 2009	Doesn't run here. (xpsp3)
WinFan 19. Jan 2009	AntiVir detects a virus ^^
Sashx41 Author 19. Jan 2009	My detected it too, its heuristik isn't allways right :p (The reason is because 1 Olly annoying method.)
shellwolf 20. Jan 2009	Doesn't run here too. But it seems a easy one by disasm. 1.Isdebugpresent, 2.gettickcount 3.findwindows("OllyDbg") 4.numofRvaAndSizes is changed .(most virus does this)
Bswap 21. Jan 2009	When I use a olly-plugin like "Olly Advanged" the protection is no problem at all (debugger is not detected).
simonzack Moderator 22. Jan 2009	based on shellwolf's description, olly advanced bypasses all of those... I think this one is loads easier than the last anti-olly, maybe level 2...
Sashx41 Author 22. Jan 2009	I thought it's sure to not use such plugins... :/

Sashx41's Keygen #1

Download Keygenme1_by_sashx41.zip, 6 kb (password: crackmes.de)
Browse contents of Keygenme1_by_sashx41.zip

Your can patch it, you can keygen it. But if your really want to solve it then keygen it.

I thinks it's pretty easy for newbies.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 17. Jan, 2009
Downloads: 7122

Rating

Votes: 7
Crackme is quite bad.

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Solutions

Solution by givses, published 09. oct, 2013; download (10 kb), password: crackmes.de or browse.

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Solution by boon, published 17. jan, 2009; download (50 kb), password: crackmes.de or browse.

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Discussion and comments

Wasted_Bytes 15. Jan 2009	It does not run for me.Why?
Sashx41 Author 15. Jan 2009	hmm I tested it on 2 other PCs and it worked there. (And yes it's compiled for release.)
boon 16. Jan 2009	Worked for me , I'm going to submit my solution soon.
Spike-- 16. Jan 2009	Won't run here...
Sashx41 Author 17. Jan 2009	Now it should work.
LeeviON 18. Jan 2009	You know, if you put bobobobobobob as username and bobobobobobob to the password too, it says the goodboy message =D Need a tut?:)
Sashx41 Author 18. Jan 2009	Now describe why the goodboy is shown :p
Spike-- 18. Jan 2009	Hmm, still won't run :P "The application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem" I have tried it on two different machines...
Sashx41 Author 18. Jan 2009	What OS are you using? :p
kao 18. Jan 2009	Non-working on standard XP SP2 ENG. :( Needs MSVCP90.DLL, MSVCR90.DLL which are not part of standard XP installation.
Spike-- 19. Jan 2009	I'm using winXP sp3 eng. :P
Sashx41 Author 19. Jan 2009	I know the reason I'll be fixin it soon.
Spike-- 20. Jan 2009	Okay, great. :)
Spike-- 21. Jan 2009	Hmm, weird. Now it works. Wasn't really hard, but very good practice. :) I also made a keygen, but sending another one would be a waste of time.
junkey 23. May 2009	Yeah. Uploaded Solution : )
skynetuniverse 24. May 2009	Really easy... Toke me about 30min to figure it out!!! But this is great! Thanks
qHF; 11. Nov 2009	Nice. I'd upload a solution, but I doubt I'd add anything to the existing solution... Wasn't hard, but at least it was some practice.
mem0rex 09. Oct 2010	sith si yase...
r-Evolution 10. Oct 2010	Yes really easy indeed!!! !!!deedni ysae yllaer seY ;)
luthotho88 13. Jul 2012	I dnt mean to be stupid but I would like to know if the keygen works on all softwares
blabla 11. Aug 2012	its took me 3 mins that is easy
hack00 05. Jan 2013	that is just a masterpiace
alin_c9 09. Jan 2013	this is my first attempt to crack :D I'm so happy that I did it !!
dzxyasser 12. Jul 2013	Done .. Cracked By Me :)
fokolo 04. Oct 2013	nice i liked it very good for as a noob :D
cracknoob 02. Nov 2013	its already cracked lol
Unknown Coder 28. Nov 2013	low... http://www.dodaj.rs/f/2e/qu/3olCGuXK/capture.jpg Cracked
Floatz 24. Jul 2014	If you write the username as 8 letters of the same, and the password 8 of the same it says it's right.

Savage's Slayer's Crackme # 1

Download Slayer_Crackme1.zip, 7 kb (password: crackmes.de)
Browse contents of Slayer_Crackme1.zip

Easy for first :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 24. Nov, 2006
Downloads: 1722

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by pwn, published 04. feb, 2007; download (4 kb), password: crackmes.de or browse.

pwn has not rated this crackme yet.

Solution by BaKaE, published 05. dec, 2006; download (229 kb), password: crackmes.de or browse.

BaKaE has rated this crackme as quite nice.

Solution by hardcoder, published 01. dec, 2006; download (12 kb), password: crackmes.de or browse.

hardcoder has rated this crackme as quite nice.

Solution by crack, published 01. dec, 2006; download (9 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Fergo 25. Nov 2006	Nice serialme. Already enabled the button, but i'm stuck at the serial generation. :(
modchip 25. Nov 2006	Yeah, me too, Step 1 ok, but can't always fail in registration, any hints? :(
jessica 25. Nov 2006	i don't understand what do you mean sign S(Hex) and how about the result for this A xor B =S How i can make this xor = S
HMX0101 25. Nov 2006	2nd part is easy... A serial can be: 0000XX00 XX = 3030 xor Sum(ComputerName) Put in X's two bytes as ascii char... Example: XX = 3030 xor 1CB (my computername sum) XX = 31FB 0000Ã»100 \|\| FB\| 31 That's all ;)
Fergo 25. Nov 2006	Hum, thanks HMX. The problem is that i've got stuck on all those DWORD PTR DS:[...]. I don't know what to do when see some codes with ald theses pointers. I don't know exatcly what this means and where are those values pointed.
IronButterfly 27. Nov 2006	Solved without enabling the button. Just finding the right serial. Where is my mistake. Tomorrow i will post the sol.
IronButterfly 27. Nov 2006	Sorry, need some more minutes. I am very close, however.
IronButterfly 27. Nov 2006	Ok, give a hint how to enable the button without patching. I think I can give the routine calc.
ty123 27. Nov 2006	TO IronButterfly, Pls re-read clipboard part of this proggie. Is this a hint? I dont know, ;-)
IronButterfly 27. Nov 2006	Many thanks, ty123. It is a good hint. I already figured it out. I hope to post the sol tonight. Thank you again for your message! and sorry for my too many messages...
BaKaE 28. Nov 2006	yes thiz crackme is nice, easy to understand, but you need to think a little to create a keygen good work savage
Savage Author 28. Nov 2006	i hope you liked it :)
IronButterfly 30. Nov 2006	Nice crackme. I enjoyed a lot. I asked also for a little help. I am posting the solution. Hope to be clear.
deibiz_xxl 01. Dec 2006	HMX1010's comment should be removed... very big hint.
Savage Author 05. Dec 2006	Here is the sourcecode as i promised (: http://d.turboupload.com/d/1297607/crackme1_source.zip.html
Immortal_One 08. Feb 2007	Cool crackme :)
hound 09. Feb 2007	Just did it, I like it :).

Savage's Slayer's Crackme # 2

Download Slayer_Crackme2_fixed.zip, 68 kb (password: crackmes.de)
Browse contents of Slayer_Crackme2_fixed.zip

Some big nums :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 29. Nov, 2006
Downloads: 707

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by ORacLE_nJ, published 25. jun, 2010; download (179 kb), password: crackmes.de or browse.

ORacLE_nJ has rated this crackme as quite nice.

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Discussion and comments

DaBookshah 27. Nov 2006	AVG free detects it as an "unknown virus". How on earth does it work that one out?
TQN 27. Nov 2006	I have unpacked the exe, but I could not able to unpack the crap0.dll. On my OS: WinXP Sp2, the crap0.dll could not dynamic load. The LoadLibary call at 00401102 in the exe failed. Can you show me the packer name which used to pack the crap0.dll.
TQN 27. Nov 2006	I run Process Explorer, and I see the crap0.dll could not loaded in the process memory of original and not unpack Crackme2.exe. Can it be a bug of packer.
aallove 27. Nov 2006	@TQN:dll packed in the same way as the exe. here my unpacked dll,though i do not think it is necessary to unpack it. http://www.live-share.com/files/102972/crap0.zip.html
Savage Author 27. Nov 2006	upx + Morphine 2.7
zairon Moderator 29. Nov 2006	New version uploaded, packers/crypters removed. Enjoy the crackme :)
boof 29. Nov 2006	i have a silly question.. :) the read me says that the rules are in the about button well i got to a part that the crackme is acting wierd :) when i load it i get a wierd msg box with .caption in cap and when i click the about button some wierd msg box comes up again..and it doesnt show the rules... so....i was thinking if it shows no rules could i patch it? hehe i'm kiddin i'm stuck :(
hardcoder 30. Nov 2006	@boof: check if s2License.reg file exists in the same directory.Delete it you have a clean About box....... @savages, very boring crackme, still diging into it but no luck
Savage Author 30. Nov 2006	everyone has ideas but i personally dont think its boring, you must just see what is happening there, i've received a working keygen after 2days i released this crackme. So if you dont like it, you just dont spend your time on it, since this is just for fun..
hardcoder 30. Nov 2006	Hey, Savage just no offense at all, I liked it and your first one... But Cryptography is what makes me sweating in the winnter....................
m@rio_crk 01. Dec 2006	this is pretty easy if are familliar with crypto basics, nothing new but nice idea for keyfile crackme :) cheers Savage

saytos's EnableMe & PushMe #1 by saytos

Download PushMe#1.zip, 2 kb (password: crackmes.de)
Browse contents of PushMe#1.zip

Simple crackme in asm...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Assembler

Published: 05. Sep, 2006
Downloads: 729

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by cyclops, published 10. sep, 2006; download (2 kb), password: crackmes.de or browse.

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Solution by D4ph1, published 10. sep, 2006; download (7 kb), password: crackmes.de or browse.

D4ph1 has rated this crackme as quite nice.

Solution by Kostya, published 10. sep, 2006; download (53 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 05. Sep 2006	Ok, i solved it...i think this crackme is very interesting! Now i write a solution
saytos Author 10. Sep 2006	Congrat EvOlUtIoN, cyclops, D4ph1 and Kostya!!!
r00ster 04. Apr 2008	The subs for runtime code substitution are really really interesting. For me, this is definitely a great job. Congratz to saytos!

saytos's Keygenme#2

Download keygenme#2_saytos.zip, 12 kb (password: crackmes.de)
Browse contents of keygenme#2_saytos.zip

.:.:. Keygenme#2 .:.:.
---------------------------------
Compiled in : MASM
Date : 5.01.2007 3.57 am
YES : keygen with src
NO : self-keygenning,patch,serial-fishing
Tested on : WinXp SP2
Happy cracking :)
saytos
/2007\

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 08. Jan, 2007
Downloads: 696

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by crack, published 15. jan, 2007; download (83 kb), password: crackmes.de or browse.

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Solution by Guetta, published 15. jan, 2007; download (301 kb), password: crackmes.de or browse.

Guetta has rated this crackme as nothing special.

Solution by profdracula, published 15. jan, 2007; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

profdracula 09. Jan 2007	KeygenMe contains a bug. What is the length of TEA_KEY? If its 8, from where next 8-bytes will come? :) Anyway, solved and submitted :)
HMX0101 09. Jan 2007	profdracula... length of TEA_KEY is 16 :) but yeah contains a bug... TEA can't encode more than 8 chars... if the name uses more than 8 chars? he only are going to take 8 chars :)
profdracula 09. Jan 2007	Yes HMX0101, I know TEA Block-length=8 Bytes and TEA Key-length= 16 bytes. Actually my question was a tip to guyz trying to solve this keygenme :) This keygenme uses a key that was actually not intended to be used. It gets a tail from around LOL. But name-length is not a problem, because TEA_Encrypt handles the names>8 chars, or in case of name<8 uses 0-padding :)
Guetta 09. Jan 2007	Yeah, you're right for the bug profdracula, anyway keygen done, i'll write a solution tomorow.
saytos Author 30. Jan 2007	Oooh.. Yes! TEA_KEY 16b It is necessary to be closer:) All thanks. It was interesting to me to esteem yours tut!

Solution by figugegl, published 29. jul, 2003; download (20 kb), password: crackmes.de or browse.

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Solution by NeO'X'QuiCk, published 12. apr, 2001; download (76 kb), password: crackmes.de or browse.

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Solution by sphinx, published 12. apr, 2001; download (11 kb), password: crackmes.de or browse.

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Send a message to scarebyte »

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Discussion and comments

deurus 17. Feb, 22:23	I solved long time ago, and now reminiscing. http://deurus.info/2016/02/1048/

scarebyte's keygenme #03

Download sb_kgme03.zip, 24 kb (password: crackmes.de)
Browse contents of sb_kgme03.zip

try to keygen this little thing ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 27. Sep, 2004
Downloads: 1228

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Solutions

Solution by Plasmator, published 06. oct, 2004; download (72 kb), password: crackmes.de or browse.

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Discussion and comments

scarebyte's keygenme #04

Download sb_kgme04.zip, 34 kb (password: crackmes.de)
Browse contents of sb_kgme04.zip

i won't say anything about the protection. its not so hard. so try it and have fun ;)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 27. Sep, 2004
Downloads: 1015

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scarebyte's keygenme #2

Download sb_kgme2.zip, 30 kb (password: crackmes.de)
Browse contents of sb_kgme2.zip

just a keygenme .. do it and be happy

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 15. Apr, 2003
Downloads: 1252

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Solutions

Solution by figugegl, published 29. jul, 2003; download (20 kb), password: crackmes.de or browse.

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scarebyte's uCF keygenme 1.0 (official uCF trial)

Download ucfkeygenme.zip, 548 kb (password: crackmes.de)
Browse contents of ucfkeygenme.zip

NO SOLUTIONS ACCEPTED HERE (Trial !!!)

Difficulty: 7 - Very hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. Jan, 2003
Downloads: 2428

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Solutions

Solution by Tymon, published 08. aug, 2005; download (46 kb), password: crackmes.de or browse.

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Discussion and comments

bundy 08. Aug 2005	Conratz Tymon, very good solution. Altough I solved this crackme a long time ago (1 year) I never had the time to write a tutorial. Btw, I factorized the modulus in 17 hours :( with RSATool. If I correctly remember there was MD5 too and shifting CRC32 tables ... you were right no to mention those, because the values were overwritten later :). In my keygen I got rid of the SHA1 too. I've set the a (big)= b:d [parts od sn] to 1 and M (big)= c:e [parts od sn] was x regardless of the hash :)
scarebyte Author 10. Aug 2005	yes .. i was stupid at coding that keygenme .. dunno why i set the sha-1 context back .. maybe it was too late in night or something else .. but congrats tymon for solution ;)
5aLIVE 10. Aug 2005	I've go two questions about this keygenme. 1. If I enter a serial using Tymons keygen I get the error message "Datei nicht gefunden" upon pressing Alt+C pressing the Check button gives a "Serial is not correct" message. 2.The keygenme also creates a key in the registry: HKEY_LOCAL_MACHINE\SOFTWARE\Krypton\"C:-DOCUME~1-LOCALS~1-Temp-Temporary Directory 1 for ucfkeygenme.zip-keygenme.exe" Webroot Spy Sweeper report this key as the rbot (Trojan Horse). Rbot is an Internet Relay Chat controlled Trojan horse that may allow a hacker to gain unrestricted access to your computer when you are online. Thoughts please?
scarebyte Author 11. Aug 2005	in the crackme u can dl at crackmes.de or at my site there is no trojan inside. i think its because the file is crypted/packed. some scanner or anti-spy apps think there is a trojan but there isn't.
5aLIVE 11. Aug 2005	Hi SB. Thanks for the reply. Webroot detects the trojan when scanning the registry NOT the keygenme exe. The suspected registry entry is created upon running the keygenme. Scanning the .zip reveals no infection. Your file was downloaded from this site. It does seem unlikely that a trojan would be able to succesfully infect a packed file. Confused.
haggar 11. Aug 2005	Krypton is name of one older packer/protector. I don't know how that key could harm you. It is under software key, which is mented for third paty software. As you can see, it points to some temp folder, so it could be just pathe that packer knows where tu unpack files. I have Krypton on my computer and some simmilar key for a long time now. But then again, I'm toally noob so don't take my word for fact.

scherzo's KeygenMe 1 by scherzo

Download KeygenMe_1_by_scherzo.zip, 402 kb (password: crackmes.de)
Browse contents of KeygenMe_1_by_scherzo.zip

Welcome to a very interesting crypto-math KeygenMe!!!
Probably, you will see some new things for you, I hope.

Objectives:
- Understand the algorithm
- Write a tutorial
- Make a keygen

Rules:
- No patches

OS:
- This KeygenMe work perfectly only with Windows2000 and WindowsXp (NT systems)

Enjoy it and good luck!!!
You will need :)

scherzo

Difficulty: 6 - Hard, for very professionals only
Platform: Windows 2000/XP only
Language: C/C++

Published: 01. May, 2006
Downloads: 407

Rating

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Solutions

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Discussion and comments

TQN 02. May 2006	This crackme uses NAG C Library, too big to download the lib (132 MB).
scherzo Author 02. May 2006	Hello TQN! I know that NAG is big but here http://ceu.fi.udc.es/SAL/B/0/index.shtml there are a lot of free and small numerical libraries. Good luck! scherzo

ScR1pT_'s CrackME by ScR1pt_

Download crackMe_by_ScR1pT_.zip, 94 kb (password: crackmes.de)
Browse contents of crackMe_by_ScR1pT_.zip

THis easy crackMe!

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 06. Apr, 2006
Downloads: 832

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Solutions

Solution by sherwinjaye, published 15. apr, 2007; download (490 kb), password: crackmes.de or browse.

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Discussion and comments

l0calh0st 06. Apr 2006	If you have solved previous crackme then there should be no trouble.....Solved it...Thanks....and expecting some harder stuff
sherwinjaye 16. Apr 2007	Level changed to 3/10? I remember it was 1/10 when I cracking it... Anyway, a simple crackme if you only patch it,but you can learn more about VB when you try to keygen it.

ScR1pT_'s > Crack me by ScR1pT_ [rds*dc]

Download CrackMe_by_ScR1pT__[rds.dc].zip, 7 kb (password: crackmes.de)
Browse contents of CrackMe_by_ScR1pT__[rds.dc].zip

My first crackMe. To my mind it's very easy crackme.
Good luck!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 03. Mar, 2006
Downloads: 1237

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by HMX0101, published 06. mar, 2006; download (866 b), password: crackmes.de or browse.

HMX0101 has rated this crackme as boring crap.

Solution by l0calh0st, published 06. mar, 2006; download (50 kb), password: crackmes.de or browse.

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Discussion and comments

l0calh0st 03. Mar 2006	Very Very Easy...:) The login information is hardcoded..so there will be no trouble for anybody ;)
@hotmail.com 04. Mar 2006	This was really easy. Great for n00bs.
astigmata 04. Mar 2006	yeah easy, but there is a bug for me when you register a software it stays registered if you exit and restart it, you ll see UNREGISTERED :D
Ank83 04. Mar 2006	astigmata that is not a bug. the app don't have any code to save the name on wich you register it.
songangel 04. Mar 2006	I saw the login info also but I went the extra mile and cracked it so any login/pass will be accepted.
ScR1pT_ Author 05. Mar 2006	All greetings! I only start to program on Visual Basic and yet I do not know, how to keep parameters in CrackMe. Help me somebody. Leave for me the message on crackes.de or write on e-mail:: rustyfog@rambler.ru
l0calh0st 05. Mar 2006	just get a good book like "Visual basic black book" to get started..it is available online..just seach for it..if any trouble pm me:)
ScR1pT_ Author 06. Mar 2006	And where solution to mine CrackMe's was gone!!
Dr_me 14. Mar 2006	Dude there is an easy way to register it with anything!, after you locate strcmp, simply change the following sbb with XORthis ensures that you will always get 0 -----> tada regitered

ScR1pT_'s EnableMe v1.0 by SCRiPT

Download EnableMe_v1.0_by_SCRiPT.zip, 8 kb (password: crackmes.de)
Browse contents of EnableMe_v1.0_by_SCRiPT.zip

Easy CrackMe (EnableME). Coded in MiCROSOFT ViSUAL BASiC 6.0.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 12. Apr, 2006
Downloads: 1237

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by El_PuPaZzArO, published 10. sep, 2006; download (12 kb), password: crackmes.de or browse.

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Solution by HMX0101, published 20. apr, 2006; download (11 kb), password: crackmes.de or browse.

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Solution by Taliesin, published 18. apr, 2006; download (23 kb), password: crackmes.de or browse.

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Discussion and comments

moofy 12. Apr 2006	What is hidepe? I opened it up in Hex Workshop and at the bottom it says hidepe...
Taliesin 12. Apr 2006	open in W32dasm - it will disassemble it all. Choose load process and follow it. Offset 1240 is being overwritten with 68B01A4000E8F0. change that with hex editor and change program entry point to 401240.
Taliesin 12. Apr 2006	From what I can tell hidePE seems to confuse some disassemblers (i.e. Olly). You can change the OEP by typing 4012 at offset E0. That allows Olly to work correctly.
EsKiMo 17. Apr 2006	Humm the CheckedMe button is interesting... VB does not include the code for standard properties like Enable=True and Visible=True. This is what happens with the Check=True ! How can you change the property if it is not explicit in the crackme? I would try rename the "CheckedMe" to something shorter in order to get some free bytes for the Check property (2 bytes are needed).. but so far this tecnique has failed. Btw, I enjoyed the HidePE thing.
SasaMaker 17. Apr 2006	Ok, I HAve Gotten Rid Of HidPE But, HOW DO I ENABLE THEM!?!?!? Whats With The Time? And I HAVE Tryed VBReformer, But, GRRR! I DONT UNDERSTAND THIS! Oh! And Scr1pt, Good Job =)
LeeviON 29. Nov 2008	There is a virus! When i downloaded it, Avast! said there is a worm!! (Named Win32:Trojan Gen)

ScR1pT_'s MultyCrackMe by ScR1pT_

Download MultyCrackMe_by_ScR1pT_.zip, 63 kb (password: crackmes.de)
Browse contents of MultyCrackMe_by_ScR1pT_.zip

MultyCrackMe by ScR1pT_. Easy crackMe, for newbies.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 26. Mar, 2006
Downloads: 802

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Solutions

Solution by l0calh0st, published 29. mar, 2006; download (80 kb), password: crackmes.de or browse.

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Discussion and comments

l0calh0st 26. Mar 2006	Thanks for this crackme ScR1pT.It will keep me buzy for some time :P
HMX0101 26. Mar 2006	Easy crackme, but too much goals thanks!
Ank83 26. Mar 2006	WOW ! This is very nice crackme ! It's easy one but very nice ! I can see u put a lot of work in it. I solve it all, but writting a solution will take a day or so ! I will try to post it as fast as I can ! Best Regards Ank83
Caleb 27. Mar 2006	Btw, what tools do you use to crack VB crackmes?
Caleb 27. Mar 2006	I can find most of the passwords as strings :) But still, if there's a better tool for looking at this code, would be nice.
Ank83 27. Mar 2006	All u need is Olly and some HEX editor. But if u want to do this faster u can use VBReformer, VB Decompiler, VBDecompiler 6.0 e.t.c. Regards Ank83
l0calh0st 27. Mar 2006	Most of the things in this crkme are hardcoded....only interesting thing is enabling the secret menu :P
Ank83 27. Mar 2006	secret menu ??? You mean EnableMe1,EnableMe2 and EnableMe3 or there is something else I didn't see it ! For them you can use VBReformer and then NOP the messages !
l0calh0st 27. Mar 2006	No need to worry Ank...You have done that..:)

ScriptKiddy's AntiDBG Crackme#1

Download Crackme#1.zip, 13 kb (password: crackmes.de)
Browse contents of Crackme#1.zip

The crackme is being detected by avira and bitdefender as a virus. This is due to the use of anti reverse engineering techniques.

1. The file is not packed.
2. I have used some common antireverse engineering techniques, I did not invent these techniques so I take no credit for them.

TO COMPLETE:
1. Make a keygen
2. Make a tutorial

You must actually show how you got rid of my antidebugging techniques, your solution will not be accepted if you do not show how to get past the antidebugging techniques. No bruteforcing, serial fishing, or cracking allowed.

Most importantly, have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 16. Aug, 2010
Downloads: 493

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Solutions

Solution by |sas0|, published 23. aug, 2010; download (9 kb), password: crackmes.de or browse.

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Solution by onepatop, published 19. aug, 2010; download (453 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

MikeRocke 18. Aug 2010	Not bad crackme, shouldnt you change the name field to something more suitable?
ScriptKiddy Author 20. Aug 2010	I am not sure what you mean MikeRocke. Also, nice solution onepaptop.
onepatop 21. Aug 2010	Glad you liked it.

scut's scut' s 2nd

Download scut2.zip, 1 kb (password: crackmes.de)
Browse contents of scut2.zip

do you know what' s a g-lfsr ? well, you...

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jul, 2002
Downloads: 1654

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Solutions

Solution by the+q, published 11. jul, 2002; download (5 kb), password: crackmes.de or browse.

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HMX0101 27. Feb 2007	Easy... only trick i can see is obfuscation of Base64 table ;)
sd333221 Author 27. Feb 2007	then you were not very attentive ;-)
profdracula 27. Feb 2007	I think this one uses SMC, because a valid serial while being debugged is invalid otherwise, or a time of being opened is used in calculation, so that a serial that is valid at one-time is invalid at other-time(if this is the case, then it'll be foolish to external-keygen it).
sd333221 Author 27. Feb 2007	The first thing is right, the secound thing (the random value calculated at start) is just to randomize the CPU-ID given... Furthermore it's included in the output of the cpu id, you can external-keygen it without any problems (expect this debugger stuff with SMC :D)
sd333221 Author 08. Mar 2007	Nice solution @ cooller_ho, =) It's a debug check which detects your olly (SLT) <- Riddle ^^

sd333221's C++ Keygenme [1/10]

Download Keygenme-now-sd333221.zip, 262 kb (password: crackmes.de)
Browse contents of Keygenme-now-sd333221.zip

This is a Keygenme by me (sd333221),
written in c++

Some people could know me from the gRn community!

Your Mission:
Getting a valid serial (difficulty: 0.1/10)
Making a keygen (difficulty: 1/10)

I hope you'll have fun with this

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: C/C++

Published: 26. Sep, 2006
Downloads: 1787

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Solutions

Solution by geeko, published 02. oct, 2006; download (263 kb), password: crackmes.de or browse.

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Solution by evo_it, published 02. oct, 2006; download (1001 b), password: crackmes.de or browse.

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Discussion and comments

BoR0 27. Sep 2006	BTW nice pic :)
sd333221 Author 27. Sep 2006	Nice, thats what i expected, i will try harder now :-)
BoR0 27. Sep 2006	My comment was deleted. if anyone is interested in solving this crackme send me a PM.
evo_it 27. Sep 2006	nice idea (and pic), really simple ;)
Icey 09. Feb 2007	Whoa nice pic dude. :P Kinda off topic but are you the same guy that made the magic ISO patch or some ISO patch? Because this crackme and the patch have the same icon art. I'll get started on this. :D
phanthom 12. Feb 2007	this is too easy, why did nobody tryed to understand how that number is generated from the HDD serial and how that information is retreived from the HDD ...that's more interesting
zairon Moderator 14. Feb 2007	phantom, why don't you write a tutorial explaining the interesting parts? Just a suggestion...

sd333221's Lightning Crackme

Download LightningCrackme.zip, 1856 kb (password: crackmes.de)
Browse contents of LightningCrackme.zip

Level: 3/10
Language: C++
Size: Way too big

Happy holidays for everyone of you :-)

Requirements:
++ A bit of time ++
++ some clever thinking ++

Comments:
++ No debugger detection this time ;-) ++
++ I hope you like some slightly obfuscated code ++

Task:
++ Get a valid serial / write a keygen ++
++ ++

Rules:
++ Do not patch ++
++ Write a tutorial if you liked it ++

< Tested on Windows XP SP3/Vista/7 >

Greetings to the gRn-Crew

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 23. Dec, 2009
Downloads: 1018

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Solutions

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Discussion and comments

andrewl.us Moderator 23. Dec 2009	bump for a beautiful crackme...fapfapfap
sd333221 Author 23. Dec 2009	fapping will not be tolerated. but thanks for the bump :-)
EmcE 24. Dec 2009	beautiful crackme Username :EmcE Password :59DA8906A3884D4130E9689E8885E0C5
sd333221 Author 24. Dec 2009	Nice, the login data is correct :-)
weeman3005 25. Dec 2009	haha great crack me Username : weeman3005 password : 1599F35E3D529239872E8C2E7E53E408 now im trying to write a keygen
sd333221 Author 25. Dec 2009	Good luck on the keygen
draww 31. Dec 2009	fishing is really easy, must try keygening ;) name: draww serial: 19E9944F0E502F61DACFA4BDA32A1768
sd333221 Author 01. Jan 2010	Indeed, keygenning is much harder than fishing, which is level 1
andrewl.us Moderator 02. Jan 2010	for fishable crackmes, keygenning is just ripping code :(
sd333221 Author 06. Jan 2010	yes but he point is that you should understand what the keygenme is doing. Otherwise you will end up adding a lot of assembler functions to your keygen
ORacLE_nJ 23. Feb 2011	GNU MP library is giving me a hard time understanding the code..... :(

sebdraluorg's S-CrackMe

Download S-CrackMe_1.0.zip, 2 kb (password: crackmes.de)
Browse contents of S-CrackMe_1.0.zip

GUI-WIN32 C/ASM

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 06. Jul, 2008
Downloads: 392

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Solutions

Solution by JoKa, published 21. oct, 2008; download (32 kb), password: crackmes.de or browse.

JoKa has rated this crackme as quite nice.

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Discussion and comments

Zaphod 12. Oct 2008	I finally found a working serial for this very nice crackme, but I cannot make a keygen. If someone can, I would be very interested in seeing it. ( There must be more than one solution ).
JoKa 16. Oct 2008	You're right, many solutions. I can make keygen, but it will use some exhaustive searching. I did it so. I take pre-defined strings for four last EditBox as arguments. Calculate string in first EditBox and AllCharXor as result. Then slightly change middle chars in pre-defined strings to get only typable (and uppercase if letter) characters in first string. Then change minor chars in pre-defined strings to get AllCharXor=1.
Zaphod 16. Oct 2008	I'm impressed, JoKa - you are good and you are fast! Are you writing a tutorial?
JoKa 17. Oct 2008	I've written keygen which does this, but this slightly changing is not easy to automate, so this keygen can give keygen not for all initial pre-defined strings (if keygen cannot find it loops doesn't exit). pre-defined strings are changed very strong in this keygen for example: Enter four 5-char strings for starting keygenning: crack crack crack crack <Z-)\BQ@BJBQ@BJBQ@@I@Q@BJ
JoKa 17. Oct 2008	I've changed keygen source, now it works better. It gives serial for many pre-define strings sets and does not change pre-defined strings too strong. Enter four 5-char strings for starting keygenning: crack crack crack crack LI<8[CRACKCRACKCRBAJTRACK

Solution by deroko, published 25. aug, 2005; download (2 kb), password: crackmes.de or browse.

deroko has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

trax 24. Aug 2005	I'm currently trying to solve it... as for what I've seen now, there seems to be quite some ADD, XOR'ing o_O And there are again and again some commands I have never seen before :D lol :)
deroko 24. Aug 2005	yah took me 5min to solve this one =) I have submitted my solution b/c I'm newbie also =)
Vermin 24. Aug 2005	I also submit a solution and IÂ´m of the opinion that it is not as easy as announced. At least not a 0/10.
doxob 25. Aug 2005	I'm trying to solve it .let me see
toshimi 24. Nov 2006	mmm not necesary brute force?

serge's assemblur

Download serge_assemblur.zip, 4 kb (password: crackmes.de)
Browse contents of serge_assemblur.zip

the powerful 'running line' technique. t

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jul, 2002
Downloads: 1519

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Solutions

Solution by the+q, published 11. jul, 2002; download (70 kb), password: crackmes.de or browse.

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serge's assemblur

Download serge_assemblur.zip, 4 kb (password: crackmes.de)
Browse contents of serge_assemblur.zip

serial

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Sep, 2000
Downloads: 1503

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Solutions

Solution by the+q, published 01. sep, 2000; download (70 kb), password: crackmes.de or browse.

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Solution by detten, published 01. sep, 2000; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

Serialcracker's KeyGenMe #1

Download KeyGenMe_#1_by_Serialcracker.zip, 20 kb (password: crackmes.de)
Browse contents of KeyGenMe_#1_by_Serialcracker.zip

1. Find a valid Serial
2. Code a KeyGen!

Enjoy it!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 17. Sep, 2006
Downloads: 712

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by BaKaE, published 25. sep, 2006; download (235 kb), password: crackmes.de or browse.

BaKaE has rated this crackme as boring.

Solution by EvOlUtIoN, published 20. sep, 2006; download (6 kb), password: crackmes.de or browse.

EvOlUtIoN has rated this crackme as boring crap.

Solution by D4ph1, published 20. sep, 2006; download (74 kb), password: crackmes.de or browse.

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Discussion and comments

EvOlUtIoN 17. Sep 2006	Ok, i solved it and written a keygen! For me it is too simple for level2 because only 4 basic math operations are needed.

Serialcracker's KeyGenMe #4 by Serialcracker

Download KeyGenMe_#4.zip, 665 kb (password: crackmes.de)
Browse contents of KeyGenMe_#4.zip

1: Fish a Serial
2: Make a KeyGen

Have Fun
Serialcracker

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 25. Feb, 2007
Downloads: 2001

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by Drakenza, published 16. jun, 2007; download (714 kb), password: crackmes.de or browse.

Drakenza has rated this crackme as awesome.

Solution by sherwinjaye, published 25. mar, 2007; download (12 kb), password: crackmes.de or browse.

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Send a message to servitute »

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Discussion and comments

Crosys 25. Feb 2007	easy one, but nice one, solved.......
sherwinjaye 15. Mar 2007	pay a little patience,everyone can solve it in that a green hand,who didn't have any experience ,has solved it just now!
deskyet 26. Jun 2007	This one is hard, I can see how every piece of code is added to the generated serial, but its hard because there are a lot of calls which add these pieces to each other. I'll try tomorrow again, I am working almost 2/3 hours on this crackme, goodjob haha.
deskyet 27. Jun 2007	hmmm I tried and tried to convert the functions from VB into delphi but I can't seem to find them all. I give it up.
Serialcracker Author 27. Jun 2007	@Drakenza: Your Patch doesn't work very good. If I type a valid serial the KeyGenMe say me: "This is not a valid serial!" Greetz Serialcracker
rydah 28. Aug 2007	Nice little crackme for beginners. Please loose the corn-ball music. :)
Drakenza 31. Aug 2007	sorry about that, stupid mistake on my part... i fixed the patch so that the accept-all-serials works with valid serials as well. there were some strange errors when i uploaded the file though so i'm not sure if it'll get through or not. let me know and i'll try again later Drakenza
deskyet 21. Sep 2007	I am back again. Going to try this one again. You here from me if I made a keygen
razor7771911 15. Apr 2012	this is an virus my antivirus says

servitute's Encrypted: find the right word to pass!

Download PassMe.zip, 9 kb (password: crackmes.de)
Browse contents of PassMe.zip

Added some layers to encrypt this little C program. Try to find the right word to enter...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 31. Jan, 2008
Downloads: 471

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by cosmos, published 05. feb, 2008; download (927 b), password: crackmes.de or browse.

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Discussion and comments

soychino 31. Jan 2008	german word for "It's good":)

servitute's Encrypted v. 2: find the right word to pass!

Download Korrect2_updated.zip, 5 kb (password: crackmes.de)
Browse contents of Korrect2_updated.zip

The Second Edition of "Korrect: fine the right word to pass!".

Used a EXE Injector to (try to) encrypt information.

Bye bye

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 07. Feb, 2008
Downloads: 504

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Solutions

Solution by hound, published 26. feb, 2008; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

profdracula 06. Feb 2008	Any password of length 10 chars or more will be valid, if 10th-character is 'd'. For example; impassword xxxxxxxxxd 123456789d
profdracula 06. Feb 2008	@servitude, I think its a bug, if so plz update your crackme.
servitute Author 06. Feb 2008	True: I'm correcting the crackme!
t3st 09. Feb 2008	try 2 make more difficult 'mez, for example - use byte-ADD on OEP. crackiong such thing will require more brainz, but it'll be more interesting )
t3st 09. Feb 2008	erm, why only OEP? onto all code :)
t3st 09. Feb 2008	and calc this byte from code.
t3st 09. Feb 2008	registration code
t3st 09. Feb 2008	it's bad that i can't alter my messages :(
TiGa 09. Feb 2008	Thinking before writing saves the need for editing.
infamousjeff 19. Feb 2008	havent had time to work on this since last weekend but I know the password just not how to get there. :)
servitute Author 21. Feb 2008	Sorry, you need to know the 'how-to', not the 'what'... Bye
hound 22. Feb 2008	All done. There is actually no termination check on the string entered though, so you can get more than one word that works but the first 10 letters are the same ;)

servitute's Euler - KeyGenMe

Download Euler_-_KGM.zip, 158 kb (password: crackmes.de)
Browse contents of Euler_-_KGM.zip

****** Hello! ******

Welcome to: my first KeyGenMe "Euler".

What to do:
- Create a KeyGen.

* Have a nice day *

------
Thanks to all the users
------

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 15. Feb, 2008
Downloads: 703

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Solutions

Solution by cosmos, published 18. feb, 2008; download (77 kb), password: crackmes.de or browse.

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Discussion and comments

seVeb's Crackme04

Download crackme04.tar.gz, 6 kb

Hello reverser, your skills are once more required for this task.
Your mission is simple, find the valid serial to show the 'good boy' message.
Attached to this post you'll find your target and the rules that apply for this job.

Good luck reverser!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 03. Apr, 2014
Downloads: 375

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Solutions

Solution by Floyd_Warshall, published 23. apr, 2014; download (8 kb), password: crackmes.de or browse.

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Solution by slqnt, published 23. apr, 2014; download (13 kb), password: crackmes.de or browse.

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Solution by piecesofme, published 23. apr, 2014; download (2 kb), password: crackmes.de or browse.

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Solution by blankwall, published 23. apr, 2014; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

seVeb's crackme05

Download crackme05.tar.gz, 30 kb

Welcome to crackme05 reverser!
Your task is simple, figure out a way to generate valid serials.
Patching is as expected not allowed. Write a keygen and tell us
how you solved the crackme.

Invoke the crackme with the --help or -h flag for additional help.

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 09. Sep, 2014
Downloads: 874

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Solutions

Solution by baderj, published 19. sep, 2014; download (255 kb), password: crackmes.de or browse.

baderj has rated this crackme as awesome.

Discussion and comments

baderj 10. Sep 2014	Nice crackme! Loved the bomb disposal steps.
seVeb Author 16. Sep 2014	Glad you like it, I'm expecting some solutions :)
lejurn 12. Feb 2015	done! sick crackme, 10/10
specx 26. Feb, 03:28	This was amazing man. Thank you for preparing such a great crackme.

seVeb's crackme1

Download crackme01.tar.gz, 5 kb

This is my first submission, find the secret number and explain how you solved it in a short tutorial. The main goal is to find out what the secret number is, not to crack it to show good boy.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 12. Mar, 2014
Downloads: 568

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Solutions

Solution by exe.surgeon, published 26. mar, 2014; download (3 kb), password: crackmes.de or browse.

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Solution by xtofs1, published 22. jan, 2014; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

molnarg 04. Jan 2014	Nice beginner crackme, I enjoyed solving it! (Warning: at the time of writing, the 32bit version did not work as intended, but the 64bit version did)
xtofs1 08. Jan 2014	Please remove the 32 bit version I also had problems with it ...
0xe7,0x1e 10. Jan 2014	Is the 32 bit version broken? I've been trying to solve it for a while, got close but it seems that when my number is converted its no longer null terminated therefore doesn't match the string that its checked against...
0xe7,0x1e 10. Jan 2014	OK, I'd solved it ages ago, yes the 32bit version is broken! :-/
xtofs1 10. Jan 2014	I know it is super annoying !
tjon.lichy 29. Jan 2014	Any tips for a complete newcomer about how one should approach things like this? I fired up my gdb, got some breakpoints assigned and figured out what's going to scanf(). After that I simply got stuck and wonder am I approaching this from a wrong angle (ie. should I be doing something else than reading disassembly output of gdb)?
blankwall 10. Feb 2014	Tips would be to look at the big picture. Where is the success call? How many ways can you get there?
seVeb Author 22. Feb 2014	I am very sorry for the broken version, I am new to C and did not test it throughly, sorry for the inconvenience!
GDBA 03. Apr 2014	Solved my first crackme ^.^ Thank you! I used IDA free and the 32bit version.
acruel 26. Jul 2015	That's not too evil. I enjoyed it. Thanks!

seVeb's Crackme2

Download crackme02.tar.gz, 7 kb

Your mission is to create a keygen, no patching allowed. Write a short description or tutorial on how you solved it.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 12. Mar, 2014
Downloads: 324

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by accipiter, published 05. aug, 2014; download (4 kb), password: crackmes.de or browse.

accipiter has rated this crackme as quite nice.

Solution by Kwisatz Haderach, published 25. mar, 2014; download (2 kb), password: crackmes.de or browse.

Kwisatz Haderach has rated this crackme as quite nice.

Solution by sadegh, published 25. mar, 2014; download (2 kb), password: crackmes.de or browse.

sadegh has rated this crackme as nothing special.

Solution by faltad, published 25. mar, 2014; download (7 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

xtofs1 11. Feb 2014	I solved it but I the solution will not be posed because it needs a description. I read the assembler and rewrote it in C, how is that for a description ;)
yojimbo 25. Sep 2014	Just thought I should mention that the solution by faltad is missing a few steps/the example keys are not valid because of this.

seVeb's Level 1

Download level1.tar.gz, 41 kb

Simple crackme for both Linux and Windows.
Compiled for Linux x86 and x64, Windows x86.

Difficulty: 1 - Very easy, for newbies
Platform: Multiplatform
Language: C/C++

Published: 20. Oct, 2016
Downloads: 438

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

Zer0Mem0ry 02. Nov, 21:27	It was fairly easy to crack this crackme, but it definitely was really fun too! It took me only about 10 minutes in total, even though the strings were encrypted it was really easy to see how the program dealt with the input keys. It was as easy as just changing the entry point's last jmp instruction to jump to location text:00401873 instead of jumping to text:00401842 where the argument input took place. Thanks for this challenge!
seVeb Author 05. Nov, 09:28	Glad you liked it :)
nickchang918 18. Nov, 15:49	The key is at 40410c, but it contains nonASCII chars. 63h, 76h, 67h, 4Eh, 94h, 0FBh, 0FDh, 57h, 7Ch, 51h 5Eh, 8, 63h, 0EEh, 71h, 78h, 0B6h, 7Bh, 4Bh, 6Ah, 3Bh 0FEh, 65h, 62h, 7Bh, 29h, 73h, 4Eh, 3Dh, 0ABh, 0BEh 0E9h, 2Ah, 0FFh, 60h, 7Ah, 4Eh, 3Ch, 77h, 7Dh, 18h 62h, 6Ch, 61h, 78h, 4Fh, 80h, 51h, 73h, 4Fh, 65h, 33h
siir 21. Nov, 19:15	I liked it. Took me a while as I'm learning but I finally got it. The key is at 0040410C (52 bytes).
darkHorus 03. Dec, 17:49	Great exercise! Actually, it was pretty easy to get the encrypted key location, but the best and most interesting thing was to discover this message: "Never compromise not even in the face of armageddon."

seVeb's Level 2

Download level2.tar.gz, 42 kb

This crackme resolves around figuring out a keyfile format
which is parsed by the binary.

You win if your keyfile was parsed by the binary correctly.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Multiplatform
Language: C/C++

Published: 20. Oct, 2016
Downloads: 57

Rating

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Solutions

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Discussion and comments

Lee\ 11. Nov, 21:29	Is it intentional to not know how to invoke it? ;) Just making sure in case you missed it in the description.
seVeb Author 13. Nov, 17:57	Yes Lee\ it is intentional. You gotta figure that out :)
microsharp 14. Nov, 03:32	need help for a decompile file ,

sghctoma's GPU CrackMe

Download gpucrackme.zip, 85 kb (password: crackmes.de)
Browse contents of gpucrackme.zip

This is a crackme that uses DirectX and GPU shaders for key validation. Please read the readme.txt for details!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 04. Feb, 2009
Downloads: 427

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Solutions

Solution by d0ping, published 29. aug, 2012; download (478 kb), password: crackmes.de or browse.

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Discussion and comments

DaBookshah 03. Feb 2009	Hmm, weird. I don't get a prompt for a name with or without debugger attached. DialogBoxParamW returns -1, and the messages recieved by the dialog func are in order 0x30, 0x02 (WM_DESTROY), 0x82 (WM_NCDESTROY). Or I could be missing a massive chunk of anti-debugging code somewhere I guess :/
sghctoma Author 03. Feb 2009	Mea culpa, mea maxima culpa.. I've done a little reading, and now I think I am using DialogBoxParam incorrectly.. I pass NULL as the first parameter (HINSTANCE) instead of the actual HINSTANCE value.. btw, I've tried the program on my, and three other computers (one Windows 7, one Vista and two XP's) and the program ran fine.. it is not clear for me yet, why it runs fine on one machine, and why it doesn't on another.. anyway, I'll upload a fixed version soon.. I hope it will solve the problem...
DaBookshah 04. Feb 2009	I'm running XP SP2
sghctoma Author 04. Feb 2009	the update has been approved, I hope now it will work for you, DaBookshah.. btw, just out of curiosity: did anybody else experience the same problem?
DaBookshah 05. Feb 2009	Nope, no good :( think it might just be something screwy with my computer. Still only getting WM_SETFONT, WM_DESTROY, WM_NCDESTROY, in that order. Doesn't even get to INITDIALOG :(
andrewl.us Moderator 05. Feb 2009	works here after installed DirectX junk.. XP SP2
simonzack Moderator 05. Feb 2009	mine says directX initialization failed what happened with directX???
sghctoma Author 05. Feb 2009	@DaBookshah: I'm sorry to hear that, but I haven't got the slightest idea, what could be the problem.. @simonzack: Is your VGA-card Pixel/Vertex Shader 2.0 capable? The crackme uses PS/VS 2.0. @andrewl.us: I'm glad, that there is actually somebody, who can run it :)

Solution by roy, published 26. apr, 2000; download (1 kb), password: crackmes.de or browse.

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sha6rath's nsa crackme #3

Download nsa_cm3.zip, 86 kb (password: crackmes.de)
Browse contents of nsa_cm3.zip

serial (uses time)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 20. May, 2000
Downloads: 1450

Rating

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Solutions

Solution by robert mccoy, published 20. may, 2000; download (4 kb), password: crackmes.de or browse.

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Solution by ubique.daemon, published 20. may, 2000; download (1 kb), password: crackmes.de or browse.

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-Shadow-'s Shadow's Registerme

Download RegisterMe_by_Shadow.zip, 8 kb (password: crackmes.de)
Browse contents of RegisterMe_by_Shadow.zip

Anything goes with this one, I personally can't figure it out.

Clue: Uses random numbers to (attempt to) prevent keygenning =P

Objective:
Disable start and end nags, enable disabled button, rename 'Register' button to 'Registered to Shadow', change unregistered to 'Registered to Shadow!'. All of this is completed automatically when you find a correct serial. Then find a way to allow other people to activate it(loader, keygen, etc.)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 28. Jun, 2010
Downloads: 658

Rating

Votes: 4
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Solutions

Solution by deurus, published 03. jul, 2010; download (691 kb), password: crackmes.de or browse.

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Discussion and comments

brangelito 28. Jun 2010	How would you generate keys yourself, if you're just comparing the serial to random values? :)
-Shadow- Author 28. Jun 2010	I'm not sure of the wiseness of keygenning at this point. It'd be much more straightforward to patch or self-keygen, I think.
brangelito 28. Jun 2010	If you can insert a hook on the native GetTickCount() function (in kernel32.dll), you can retrieve the random seed. From there you easily can generate a key. Not sure whether I'll post a solution though.
-Shadow- Author 29. Jun 2010	Also remember that the random number is not the entirety of the serial generation process. it's just... an added bonus =P
deurus 30. Jun 2010	More easy to patch!!
-Shadow- Author 01. Jul 2010	MORE easy. Still not really easy. For example, where is the serial verification process within the code?
deurus 03. Jul 2010	Hi shadow! I patch the nags and the random routine Solution sended
-Shadow- Author 08. Jul 2010	GO deurus =P. Solution works perfectly, all criteria solved. Thanks man! However, a keygen can still be sent as a solution. Good luck!
apuromafo 18. Dec 2015	some other idea maybe taked from deurus in spanish https://reversecodes.wordpress.com/2015/12/18/crackme-nivel-2-net/ in english the only new is the batch: @echo off color a :inicio set/p nom=put your username?= pause cls echo the password is: echo %nom%urastupiddumbidioticcrazynoob%nom%1 pause cls goto inicio
deurus 04. Feb, 22:38	VideoTutorial: https://www.youtube.com/watch?v=KR3PgtDMjmg&index=5&list=PL6mApIrwvMthNYqiL8bjCc2oOlQ-yUHeY

Shalamandra's Harry Potter Crackme

Download Harry_Potter_Crackme.zip, 128 kb (password: crackmes.de)
Browse contents of Harry_Potter_Crackme.zip

It's very simple... you had to find the serial...

If you read the book, you should know why that's Harry Potter crackme!!!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 26. Feb, 2009
Downloads: 1650

Rating

Votes: 5
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Solutions

Solution by maik, published 08. mar, 2009; download (2 kb), password: crackmes.de or browse.

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Solution by T.0.R.N.A.D.0., published 21. mar, 2009; download (2 kb), password: crackmes.de or browse.

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Solution by xrem, published 28. feb, 2009; download (1 kb), password: crackmes.de or browse.

xrem has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

Xspider 26. Feb 2009	nice crackme mate i love HarryPotter :D and so LordV :p
Kabalad 26. Feb 2009	Nice one! However I prefer Sauron minions! :)
br0ken 27. Feb 2009	I've only read till Goblet of Fire. Will I be able to solve this?
br0ken 27. Feb 2009	Nevermind. Ignore my question :P
xrem 28. Feb 2009	i done it) Nice crackme. Next time don't use strcmp. cheak string by chars =)
Shalamandra Author 01. Mar 2009	Thanks for all your comments....
bone 03. Mar 2009	good crackme. nice for beginners.
Sergeus 04. Mar 2009	It was my second crackme and it was really pretty!! Nice job boy!!!
T.0.R.N.A.D.0. 06. Mar 2009	Good crackme :) Appropriate for beginners.
windowbase 21. Mar 2009	Many Thanks T.O.R.N.D.0. I can clearly understand now.
deibiz_xxl 02. May 2009	It is nice... xD maybe you have to improve it adding some other checks and upload new versions!
Marsya 03. Mar 2014	appreciated that one. That's quite a simple one. Can't figure out why it took me so much time.
Unknown Coder 23. Mar 2014	Soloved it very easy but interesting , good job :D http://www.dodaj.rs/f/3d/dw/23i4fPo5/capture.png prove
Mroz3k 24. Jul 2015	Had some trouble with understanding how string encryption works. Crackme is great :)

shaman's antismex2

Download antsmex2.zip, 2 kb (password: crackmes.de)
Browse contents of antsmex2.zip

decrypting a known buffer of bytes using...

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jul, 2002
Downloads: 800

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Solutions

Solution by hijaq, published 11. jul, 2002; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

Shap0renk0's CrackMix

Download CrackMix.zip, 18 kb (password: crackmes.de)
Browse contents of CrackMix.zip

COOL!!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 23. Jan, 2006
Downloads: 818

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by EsKiMo, published 12. feb, 2006; download (68 kb), password: crackmes.de or browse.

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Discussion and comments

Ank83 26. Jan 2006	Nice CrackMe. I unpacked, killed the NAG but i got stuck on enable the button. It's tricky becase is P-Code. I'm using WKTVBDE. I know that the button is disabled in the timer in Form1, but I can't find where to patch, to make it always enabled. I will try harder. Regards Ank83
windayjiang 27. Jan 2006	Please, don't pack the file, I unpack the exe with FSGUNPACK2.0, when I execute, it gots error.
Ank83 27. Jan 2006	unpack it manually ! it's simple.
Ank83 30. Jan 2006	Eskimo u rule ! :) Nice written solution. A learned a couple of thing from u. Thanks. :) Regard Ank83

Shap0renk0's ECM1

Download ECM1.zip, 33 kb (password: crackmes.de)
Browse contents of ECM1.zip

A very esy one, but interesting!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 30. Dec, 2005
Downloads: 869

Rating

Votes: 4
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Solutions

Solution by HMX0101, published 02. jan, 2006; download (169 kb), password: crackmes.de or browse.

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Solution by Ank83, published 02. jan, 2006; download (9 kb), password: crackmes.de or browse.

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Solution by EsKiMo, published 02. jan, 2006; download (136 kb), password: crackmes.de or browse.

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Discussion and comments

EsKiMo 30. Dec 2005	Submitted something :) Happy New Year!
HMX0101 30. Dec 2005	i can't enable the buttons, somebody can help me?
Ank83 30. Dec 2005	HMX0101, NOP the adress: 0040D734 ! That adress is calling procedure to disable the check button ! And the second button is enabled in procedure that check if the check button is enabled ! In short words just NOP that adress ! :)
Ank83 30. Dec 2005	Name: Vladimir Serial: LV78Vl-PZ Do we need to write a keygen, or what ! What is the goal of this crackme ? Keygen would be easy, but I'm too lazy to write solution !
HMX0101 31. Dec 2005	Solution submitted ! Thanks to Ank83, happy new year !!!

Shap0renk0's KG-me (for total NEWBIEZZ only)

Download KeygenME.zip, 254 kb (password: crackmes.de)
Browse contents of KeygenME.zip

Several tasks///
Very-very simple

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 23. Jan, 2006
Downloads: 1391

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Solutions

Solution by windayjiang, published 29. jan, 2006; download (149 kb), password: crackmes.de or browse.

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Solution by Ank83, published 26. jan, 2006; download (508 kb), password: crackmes.de or browse.

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Solution by ninar1, published 26. jan, 2006; download (1018 kb), password: crackmes.de or browse.

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Discussion and comments

Ank83 23. Jan 2006	Having problem with enableing the button ! Can some help me ?
ninar1 23. Jan 2006	there is a comparsion made that checks the true or false flag @004355xx patch it
HMX0101 24. Jan 2006	Patch the program to accept any serial - very very easy Remove the nag - very easy Keygen - easy Enable the button - hard
ninar1 24. Jan 2006	nah buutton isnt hard i must say , im very new here 1 week of testing olly and found the place
everett 15. Feb 2006	how do i unpack the file
Kerberos 15. Feb 2006	This CME is packed with FSG 2.0 so you have 2 options how to unpack this CME. 1) You can use UnFSG 2.0 coded by eedy31 ... 2 clicks and CME is unpacked 2) Or you can use OllyDBG with OllyScript & OllyDump plugin ... (In Options->SFX select Stop at entry point) and then run unFSG 2.0 script. After it's finished dump it using OllyDump ... First option is fast & easy so use UnFSG :)

Shap0renk0's Shap0renk0's Kick_My_Ass

Download KickMyAss!.zip, 27 kb (password: crackmes.de)
Browse contents of KickMyAss!.zip

A very special crackme. For professionals only.=)

Difficulty: 6 - Hard, for very professionals only
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 06. Aug, 2006
Downloads: 532

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Solutions

Solution by MACH4, published 03. jul, 2014; download (561 kb), password: crackmes.de or browse.

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Solution by ala_borbe, published 11. aug, 2006; download (477 b), password: crackmes.de or browse.

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Discussion and comments

ala_borbe 11. Aug 2006	I found the way to defeat your protection... Its wery easy :-)
Taliesin 16. Aug 2006	I also found that you could just rename the tmp file to an exe to unpack the file. I'm confused how the solution addresses the issues in the readme though. Keygen? Keyfile? Personally, I was having problems with the layout of the keyfile (always a rough one for me). Any other solutions coming?

sharpe's Crackme #1 by sharpe

Download two.zip, 3 kb (password: crackmes.de)
Browse contents of two.zip

This is a very simple keygenme challenge.
I have included a solution for inspiration in case you get stuck.
Try to complete the challenge first without looking at the solution.

RULES:
1. No patching
2. Write a keygen for this programme
3. Have fun and learn :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: Assembler

Published: 17. Jan, 2007
Downloads: 2021

Rating

Votes: 4
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Solutions

Solution by Sepehr, published 05. mar, 2008; download (15 kb), password: crackmes.de or browse.

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Solution by halsten, published 26. jan, 2007; download (77 kb), password: crackmes.de or browse.

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Solution by mucki, published 26. jan, 2007; download (72 kb), password: crackmes.de or browse.

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Solution by [full]root, published 26. jan, 2007; download (18 kb), password: crackmes.de or browse.

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Solution by boof, published 28. jan, 2007; download (38 kb), password: crackmes.de or browse.

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Discussion and comments

mucki 16. Jan 2007	i wrote a keygen but i'm too lazy to write a tutorial now. much useless code, i'm not sure if that was in your mind. if you need help in asm ask me.
mucki 16. Jan 2007	i found a bug in your program: you don't clean your strings and if you enter first a long name and then a short name your calculation returns an other serial.
profdracula 17. Jan 2007	This crackme is good for starters. Simple and clear :) I'm not submitting my solution but here are some tips; Use a code to clear name; OPTION 1: invoke RtlZeroMemory, offset szName, sizeof szName OPTION 2: xor eax, eax @@: mov byte ptr [szName+eax], 0 inc eax cmp eax, NAME_LENGTH jnz @B
profdracula 17. Jan 2007	Well, oh forgot to mention these tips are for 'sharpe', not for guys solving this crackme :)
BaKaE 17. Jan 2007	@profdracula there is a option to write a pm ;) i try to crack this today and submit a solution :)
ewerton 17. Jan 2007	Patching: 00401259 to 74 1A =] now go to keygen xD
ewerton 17. Jan 2007	ops ^^ ewerton uCs?@zx*)('&%$#" any idea for an keygen in delphi?
sharpe Author 17. Jan 2007	Hi there, There was a silly bug that mucki brought to my attention which is now fixed. If you mange to find a valid name/serial combination, try writing a loader or an inline patch instead of traditional patching.
Arbury 18. Jan 2007	I'm in the process of writing a Keygen (my first ever actually) for this. Am I right in thinking that in the section were the correct key is figured out, there are a lot of calculations that are decoys? Without giving the game away I mean a few lines above where EAX is compared to 0x21 and 0x7B
sharpe Author 19. Jan 2007	Hi there Arbury, There are indeed some decoy instructions so without saying too much, i'll just say you're warm :)
Anasazi 25. Jan 2007	Made it a selfgen since I can't really code Keygens yet, hope you'll be fine with that ;) Writing a tutorial.
rZrG 26. Jan 2007	Actually I submitted my solution (including keygen with src) on 22 Jan but it doesn't show up yet.
mucki 26. Jan 2007	come on Anasazi, it' very easy - there is no need of a selfkeygen!
[full]root 01. Feb 2007	rZrG - me too, but now it is here
SeyreZ 08. May 2008	Hey, I managed to figure out the serial for my name, although I have a question... when I got the serial, it originally appeared as : ctC?qe+*)('&%$#\" When I entered that serial, it said it was wrong because of the \ before the apostrophes ("). Any idea why the \ shows up? (I tried using other names, but the \ kept appearing before the " )
sharpe Author 20. May 2008	Back slashes are treated like any ascii char. It will not be escaped if this is what you mean.

sharpe's Crackme #3 by sharpe

Download three.zip, 2 kb (password: crackmes.de)
Browse contents of three.zip

This is a relatively easy KeyGenme with a few simple tricks. The crackme does some code encryption that destroys the code needed to rip the serial algo. This you need to fix. Once this is done, it should be relitively easy to rip to serial algo and generate a valid username/serial combination.

You must sort out the encryption algo in order to rip the code used to generate valid serials. You are allowed to patch here to restore the original code. After you have done this, you can either write a keygen or find a valid username and serial combination.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 05. Mar, 2007
Downloads: 1704

Rating

Votes: 4
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Solutions

Solution by MACH4, published 03. jan, 2014; download (190 kb), password: crackmes.de or browse.

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Solution by br0ken, published 17. aug, 2007; download (8 kb), password: crackmes.de or browse.

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Solution by pseudonym, published 14. apr, 2007; download (6 kb), password: crackmes.de or browse.

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Solution by El_PuPaZzArO, published 05. mar, 2007; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

pseudonym 08. Apr 2007	This was the first code-modifying crackme I've managed to crack. Thanks for the upload, my solution is in the queue.
sharpe Author 08. Apr 2007	Nice one pseudonym, they are real fun I think. I have done another one (#4) which is similar. starzboy has also done some really cool ones which you should check out. They are also loads of fun.
br0ken 16. Aug 2007	Hey...nice crackme... Just submitted my solution today. Hope you will like it.
SeyreZ 09. May 2008	Nice crackme! Kept me busy for a while. I can't code keygens (YET), so I made it a self-gen :P
r-Evolution 03. Sep 2010	Yeahp nice one!!!beated the antidbg trick IsDebuggerPresent() but could'n't write keygen :( i found a valid key anyway user: manorhacker key: 4AF7E204B0F8B8BC
d4rK_r3v3rs3R 06. Oct 2014	yep i found a valid key too, but don't know how to make a keygen ^^' name: d4rK_r3v3rs3R key: 6EC2309494F89A19

sharpe's Crackme #4 by sharpe

Download four.zip, 3 kb (password: crackmes.de)
Browse contents of four.zip

I chose to obfuscate most of the code in this crackme besides the unlock functionality. The serial generation code is the same as in my last crackme (#3) so there will be opcode signatures that will enable you to brute out the code encryption key. If you haven't completed my last crackme, you should still be able to find valid code signatures in the code. I shan't say anymore. After the Unlock Code has been found, type it in and it will decrypt the serial generation code. Then it should be straight forward.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 02. Apr, 2007
Downloads: 871

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Solutions

Solution by cyclops, published 11. apr, 2007; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

mucki 30. Mar 2007	I wrote a keygen by ripping the code - I know ripping sucks but it's tricky to write one in another language (I don't know if that was planned) because you allocated a bit less memory for the name ;)
starzboy 31. Mar 2007	he hehe ... yea One important thing about this crackme is that it reads a part of Generated Serial to make the next part of serial.[towards the end] And the Difference between the name buffer input and Serial Buffer input must be exactly 16 bytes! So the NameBuffer has to be 16dup(?) followed by the Serial Buffer ! works fine for me ...
HMX0101 31. Mar 2007	hey, starzboy have reason about name need to be followed by serial, maybe a bug? =/ anyway, keygen can be done and i've finished my one in delphi, so you can make one in any language you want ;)
starzboy 31. Mar 2007	yo hmx ... hmm yea name is followed by serial ... and the name buffer was 16 ... or maybe i missed sumthing .. will check it ...
TFB 07. Apr 2007	Nice crackme. Didn't see the signatures until after I had decrypted the code :P
sharpe Author 07. Apr 2007	Glad you liked it. How did you solve it, care to explain? Thanks in advance :)
cyclops Moderator 08. Apr 2007	Published: 02. Apr, 2007 Downloads: 181 mucki 30. Mar, 22:10 I wrote a keygen by r.............. Comments before publishing the crackme? ny way sovled.... :D
zairon Moderator 08. Apr 2007	It means the crackme was updated on April.

sharpe's Crackme #5 by sharpe

Download five.zip, 3 kb (password: crackmes.de)
Browse contents of five.zip

Description:
The serial-generation code in this crackme is obfuscated, there are no signatures this time and the entire serial generation code has been re-written. After the unlock code has been found, type it in and it will de-obfuscate the serial generation code. If you enter an invalid code, the crackme will die (depending on your luck of course), as the de-obfuscation routine may very well result in invalid instruction sequences. After this bit has been complete it should be straight forward.

Rules:
- No patching
- Find the correct unlock code
- Write a keygen
- Write a tutorial explaining how you solved this one and please include your code

I don't know how difficult this crackme is, so I would really appreciate your feedback on this, as I would like to put a difficulty level on the final release. Maybe Crackmes.de can change it accordingly.

If you have any questions, please feel free to ask :o)

Enjoy!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 20. May, 2007
Downloads: 810

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Solutions

Solution by iKid, published 07. jun, 2007; download (91 kb), password: crackmes.de or browse.

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Solution by TiGa, published 27. may, 2007; download (37 kb), password: crackmes.de or browse.

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Discussion and comments

Zaphod 20. May 2007	Well, I would say it's NOT OK - the purpose of this site is to learn, not to brag...
profdracula 20. May 2007	I know the purpose of this site is to learn, and posting a serial does'nt kill the joy, because its not a complete solution. All I wanted to ask was that whether these serial's for my name were working or not?, because there were quick-grabbed values. If asking for a validation is called "bragging" in your tounge, I really fear your ill-logic! And next-time plz mind your tounge!
zairon Moderator 20. May 2007	profdracula: serial & solution are not allowed in this area. For any kind of questions about our rules feel free to pm me. ps. Flames not allowed here, respect other members...
sharpe Author 21. May 2007	profdracula, if you send me some information on what you have found, I will gladly confirm it for you.

sharpe's Crackme #6 by sharpe

Download six.zip, 3 kb (password: crackmes.de)
Browse contents of six.zip

Hi there,

I wrote another relitively easy crackme. This is a little different that my previous crackmes in that there are a few exciting additions in it. Some of the code is obfuscated in six, including the serial-generation code as well as other “code” that may be of interest. I won’t say much more. After the unlock code has been found, type it in and it will de-obfuscate the serial generation code as with the two other challenges. If you enter an invalid code, the crackme will crash, as the de-obfuscation routine will contain garbage instruction sequences. After this bit has been complete it should be straight forward.

I hope you enjoy!
sharpe

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 26. May, 2009
Downloads: 497

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by Skid Vicious, published 02. jun, 2009; download (18 kb), password: crackmes.de or browse.

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Solution by asterix, published 01. jun, 2009; download (19 kb), password: crackmes.de or browse.

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Solution by indomit, published 01. jun, 2009; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

indomit 27. May 2009	Nice crackme! Found one of correct unlock codes, and fished key for one name :)
cobrasniper555 29. May 2009	I was able to find out the "Unlock Code" and found the check for the serial and the username. I can't however, trace or follow along just to see what happens. Olly gets stuck. Did you add an antiOlly trick in there somewhere? Anyhow, I'll be able to make a solution soon enough. Good keygenme! =]
tony 30. May 2009	aha!I have a mind,I find some magic data: for example, it must contain the "0040333a" data in code decoded,so easily guess it 's unlock code.
cobrasniper555 31. May 2009	Tony: If I remember correctly, your serial is compared to what's at that address as well. ;)
sharpe Author 05. Jun 2009	>indomit: Thanks for taking the time to write a tutorial, it is well written and detailed. >cobrasniper555: No there are no debuging tricks but remember that when you set a breakpoint, you add the byte CC to the code. I saw some debugging issued due to thise when testing my unlockme #8.

sharpe's [Unlockme] Crackme #7 by sharpe

Download seven.zip, 3 kb (password: crackmes.de)
Browse contents of seven.zip

Introduction:
If you manage to find a valid Unlock Code, type it in and press the Unlock Code button. If it is correct, things should go well when you press the Check button.

Rules:
- No patching
- Find the correct unlock code
- Write a tutorial explaining how you solved this challenge

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 05. Jun, 2009
Downloads: 502

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Solutions

Solution by morecode, published 13. jun, 2013; download (305 kb), password: crackmes.de or browse.

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Discussion and comments

AbsshA 07. Jun 2009	You should specify a little more, what kind of serials are you expecting. Because i find yet a great amount of valid codes. AbsshA
sharpe Author 07. Jun 2009	Hi, there are multiple unlock codes that will deobfuscate the code. This will result in a specific code sequence that when executed, will present you with a message. When this message is seen, the crackme is solved. There are some signatures which you will be able to use. I hope this helps.
AbsshA 07. Jun 2009	I know, i will send you solution to seven and eight crackme. AbsshA
sharpe Author 08. Jun 2009	Got your mail. Very well done. Could you send me an e-mail explaining how you solved eight? Thanks.

sharpe's [Unlockme] Crackme #8 by sharpe

Download eight.zip, 3 kb (password: crackmes.de)
Browse contents of eight.zip

Introduction:
If you manage to find a valid Unlock Code, type it in and press the Unlock Code button. If it is correct, you should be able to find the hidden secret.

Rules:
- No patching
- Find the hidden secret

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 05. Jun, 2009
Downloads: 723

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by asterix, published 24. jun, 2009; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

tony 09. Jun 2009	It's hard to guess the unlock code!
DigitalAcid 09. Jun 2009	Maybe, maybe not. We see how the badboy is made, so maybe we can think about the structure of the goodboy :).
AbsshA 09. Jun 2009	insnt a unloock code, is "hide secret".
tony 10. Jun 2009	hidden information is a picture!I guess one correct byte.but i can't guess remainder bytes
hardcoder 11. Jun 2009	Either this is very easy crack me or this is Impossible.
AbsshA 12. Jun 2009	Inst a picture, is a phrase, or better.. a name..
sharpe Author 16. Jun 2009	Any luck with this one?
Ganoes Paran 16. Jun 2009	When i type in "themewnd" it dissappears on xp, and crashes on vista. bug? or unlock code? lol
sharpe Author 16. Jun 2009	I have added exception handling so that the application will exit when an improper unlock code is entered. So what you are experiencing on XP is the correct behaviour for an invalid unlock code. The crashing on Vista I know nothing about, I don't use Vista.
Ganoes Paran 17. Jun 2009	no you misunderstoodi think you misunderstood if the intered unlock code in sunvalid, a little popup appears saying it's invalid and then it closes. however it just closes imedaitly after entering the code, or on the vista, it just "crashes" with a popup saying report problem to microsoft or what not. is this attentional? anyways, if you type in any other unlock code that is invalid, a little popup appears saying it's invalid and you get to enter the unlock code again. if unlock code works you click check, popup appears, if its wrong it closes. however if clicking check using the code above, it just immediatly exits / crashes on vista
cobrasniper555 17. Jun 2009	There's no one to do this other than guessing and bruteforcing. Who knows if there are even any results then as well...
Ganoes Paran 17. Jun 2009	i love the weird spelling errors my browser does for me lol. yea i noticed "themewnd" poping all over the place in the code so i tried it out..pased the unlock code stage, clicked check and crash o.0? lol
papanyquiL 17. Jun 2009	anything works for the unlock code as long as it's >= 8... try 'dddddddd'
cobrasniper555 17. Jun 2009	Ya, the only reversing that I was able to do is find out that the unlock code has to be between 8 and 31 chars. All of the characters go through a routine to create a "magic number" (it's what I labeled the address in my debugger) through a system of roll-overs. This number is then xor-ed with the bytes in the "buffer" (what I also labeled the section of the code being modified), replacing the original bytes with modified bytes. Unless I can figure out what those bytes or the "magic number" are supposed to be, then there's no way to make this crackme work right. If I am wrong, please explain.
sharpe Author 17. Jun 2009	I found out what is happening. The value "themewnd" decrypts the code so that it contains valid instructions including the following jump: ... jmp 3F117443 ... When execution attempts to continue at this address, it dies as this address is invalid, which is why it crashes. Vista probably catches this error prior to exiting and displays it to the user, XP merely exits. I hope this helps.
Mathias 17. Jun 2009	I agree with cobrasniper. Seems that bruteforcing is the only way to solve it but it's kinda hard to "guess" the valid instructions - it's like looking for something that you don't know:/
sharpe Author 17. Jun 2009	Hiya, you could brute force all possible but you could also have another look at the way the code is decrypted and perhaps change your approach. PS. If you liked this crackme, please tell me how much and give it a vote. Thanks :o)
cobrasniper555 17. Jun 2009	That's just the thing though. I've examined the whole crackme and now I understand how it works. However, the is are two variables in this equation. Both we don't know. Using simple math principles, we can not solve it, without guessing who know how many times, or bruteforcing. Good crackme sharpe. It's a pain in the ass. =D
simonzack Moderator 18. Jun 2009	oh, and btw, please add the message for everybody that the message only needs to be found, not displayed, to clarify things
cobrasniper555 20. Jun 2009	So..I heard AbsshA had solved the crackme. Any idea of when it might be released? Unfortunately, I've "temporarily" given up. =(
sharpe Author 21. Jun 2009	Hi there, as requested by simonzack, I will give a tip regarding what you are/are not looking for: When a valid unlock code has been entered, a specific string value is written to the data section. This string value is the solution to this challenge. There are no messages (MessageBoxA) that will inform you that you have entered a valid unlock code. View the data section in the dump view when entering values and keep your eyes peeled for valid ASCII values :o) I have received a few solutions so far, which haven't been posted here as they would spoil the challenge. If anyone wants a tip, please don't hesitate to send me a PM, I'll be certain to give you just enough information to get you moving again. Remember, if you never give up, you never lose! I wish everyone a good Sunday. sharpe.
sharpe Author 28. Jun 2009	Did my comments help at all? Happy Sunday :o)

sharpe's [Unlockme] Crackme #9 by sharpe

Download nine.zip, 35 kb (password: crackmes.de)
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Hi all,

My last reverseme was too easy due to the nature of the code de-obfuscation key length and usage. This time I have made some minor changes to precisely this portion of the code. Furthermore, I have added some anti-debugging stuff that I observed in a piece of malware.

I hope you enjoy.

/sharpe

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 21. Dec, 2009
Downloads: 568

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Discussion and comments

NicoPyright 05. Feb 2010	Hi! j0h41@j0h41@ is not invalid, but i don't find the hidden secret :-( Bye.
Gyver75 05. Feb 2010	it's s not correct! Sharpe's suggestion is the same of previous unlockme: a "secret message" in data section! Clearly in this crackme, the author has modified an obvious attack point but in reality he's a "good boy"... there's another hint in the picture! In this weekend i will write a little tute! ;)
Fauzt 25. May 2010	Fixed, but had to apply brute force to crack this open... just like Rambo!!!

Shay's CrackMe-Test

Download [S]Crack[B]Me[D].zip, 8 kb (password: crackmes.de)
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well this is kind of my first crack me here u made him only for test to check the \"protactio\" that i used here...it\'s only a \"BETA\" relese of this crack, he didn\'t finiched yet i will be glad if someone will try to crack it and will tell me plz how he did it do i can put more protacion [my english is \"sucks\"][my nick is SBD but it was taken already so i sign up in the nick "Shay"]

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 01. Sep, 2004
Downloads: 1711

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Solutions

Solution by Plasmator, published 10. sep, 2004; download (18 kb), password: crackmes.de or browse.

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Discussion and comments

shellwolf's Crackme080320_by_shellwolf

Download Crackme080320.zip, 111 kb (password: crackmes.de)
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A crackme game from bbs.pediy.com

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 01. Jan, 2009
Downloads: 294

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Discussion and comments

shellwolf Author 19. Jan 2009	rules: 1.A vaild serial or a keygen is needed. 2.point out the algo model. btw:patching is not allowed.

shellwolf's Crackme080404_by_shellwolf

Download Crackme080404.zip, 97 kb (password: crackmes.de)
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A crackme from bbs.pediy.com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 01. Jan, 2009
Downloads: 502

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Solutions

Solution by helm, published 17. jan, 2009; download (99 kb), password: crackmes.de or browse.

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Discussion and comments

shellwolf Author 19. Jan 2009	rules: 1.keygen or a vaild serial is needed. 2.point out the algo model. btw:patching is not allowed.

shellwolf's Crackme080524_by_shellwolf

Download Crackme080524.zip, 106 kb (password: crackmes.de)
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A crackme from bbs.pediy.com

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 01. Jan, 2009
Downloads: 323

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shellwolf Author 19. Jan 2009	rules: 1.A vaild serial or keygen is needed. 2.point out the algo model. btw:patching is not allowed.

shellwolf's CrackMe080726_by_shellwolf

Download CrackMe080726.zip, 123 kb (password: crackmes.de)
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A crackme from bbs.pediy.com

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 01. Jan, 2009
Downloads: 276

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shellwolf Author 19. Jan 2009	Rules: -A vaild serial or a keygen is needed. Hints: -A crackme with anti-debug trick. Btw: -Patching is not allowed..

shellwolf's Crackme080820_by_shellwolf

Download Crackme080820.zip, 204 kb (password: crackmes.de)
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A crackme from bbs.pediy.com

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 01. Jan, 2009
Downloads: 555

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shellwolf Author 19. Jan 2009	rules: 1.point out the algo model. ---level:Captain 2.provide a valid serial.----level:General 3.keygen.----level:King. btw:patching is not allowed.

shellwolf's crackme081124_by_shellwolf

Download CrackMe_081124.zip, 204 kb (password: crackmes.de)
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A crackme from bbs.pediy.com.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 14. Dec, 2008
Downloads: 410

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Discussion and comments

shellwolf Author 19. Jan 2009	rules: 1.A vaild serial or keygen is needed. 2.patching on key.dat is allowed. Hints:a vm of RISC.

shellwolf's RM090228_by_ShellWolf

Download RM090228_by_ShellWolf.zip, 318 kb (password: crackmes.de)
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A reverseme from bbs.pediy.com .
Patch is not allowed.A valid sn is accepted. and A keygen is better.

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 29. Mar, 2009
Downloads: 338

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Discussion and comments

rickster090 31. Mar 2009	Man this is a hard one to crack =]
shellwolf Author 04. Apr 2009	the algo is simple.and the method of BlackBox to analysis this crackme will be ok.

shellwolf's SM20090306_by_shellwolf(modified).rar

Download SM20090306_by_shellwolf(modified).zip, 2 kb (password: crackmes.de)
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A Serial Me from bbs.pediy.com.
Need a valid sn or a keygen, No patch is allowed.

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 24. Mar, 2009
Downloads: 361

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by iLL_LeaT, published 02. apr, 2009; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

iLL_LeaT 31. Mar 2009	Success!, finally... I'm going to write up the summery real quick so I can concentrate on school.
simonzack Moderator 31. Mar 2009	cool I'll check out your method of finding that sequence :p
simonzack Moderator 31. Mar 2009	ah what??? the sequence can just be guessed out i thought you needed to calculate it or something :( it should be longer to prevent guessing
iLL_LeaT 31. Mar 2009	I had to calculate it
iLL_LeaT 31. Mar 2009	well I had to compute it, there is no way to randomly guess it.
simonzack Moderator 01. Apr 2009	oops, you're right but I think it's a bit too easy, at least a longer key length can definitely put the difficulty at a proper level 3
iLL_LeaT 01. Apr 2009	your right, but the process of finding the sequence would be the same. it would just take longer. and the publisher has to be 100% sure that there is a legal sequence to solve.
obnoxious 02. Apr 2009	yeah thats true.....but icd nt just fix my keyegen to avoid getting legal pairs....looking 4ward to iLL_LeaT's solution :)
obnoxious 02. Apr 2009	*illegal(without repeats) i meant n not legal :)
iLL_LeaT 02. Apr 2009	It should be up soon. I keep needing to change things. Should be a very complete solution, you'll be happy with it.
iLL_LeaT 03. Apr 2009	This comment is to shellwolf. I just want to say thanks. This was the first crackme that could keep my interest long enough for me to actually solve it. It was not so long that it just took forever to figure out what everything was doing. You could not just use Reflector or JD to get the high level source. Had to use good old OllyDbg. And it was hard enough to keep me thinking. Good for people that are noobs to Reversing but still know a little about computers and the x86 assembly language.
obnoxious 04. Apr 2009	@iLL_LeaT gr8 solution + keygen
shellwolf Author 04. Apr 2009	Thanks for all the people who download this crakme,and I hope u would like and enjoy it.And Thanks ILL LeaT's solutions.it is a good solution!thanks simonzack and obnoxious too. Yes.it is a game of Knight's tour.

Shimnobiton's VBCrackMeH

Download vbcrackmeh.zip, 11 kb (password: crackmes.de)
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VB CrackMe, kinda hard

Difficulty: 9 - You can't solve this yourself :)
Platform: Unspecified/other
Language: (Visual) Basic

Published: 23. Apr, 2003
Downloads: 1276

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Solutions

Solution by MACH4, published 21. jul, 2010; download (36 kb), password: crackmes.de or browse.

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Discussion and comments

apuromafo 16. Apr 2008	the packer yoda crypter is hard~crc bad or not? not run me..
apuromafo 16. Apr 2008	well the oep is 004010E0 > $ 68 EC164000 PUSH unpacked.004016EC i was unpacked and now run, some crc was incorrect maybe in the packed, maybe..my tool was helped but are unpacked..yes true is difficult
DigitalAcid 16. Apr 2008	Yeah, the packed version doesn't run here either. Got it unpacked through a sloppy method. Unpacked version runs fine.
apuromafo 18. Apr 2008	well as is link to unpacked was cleared, but i was trying learn methods of bruteforce because are little xtrange..and maybe some day can solve this..
TiGa 18. Apr 2008	Posting incomplete or rejected solutions in the "Discussion and Comments" area is not allowed.
costy 07. May 2008	it's impossible to solve it
deurus 21. Jul 2010	I agree with costy, the algo don't have a solution
MACH4 21. Jul 2010	@deurus said "the algo don't have a solution" In a way your kinda right, it has multiple solutions! MACH4
deurus 22. Jul 2010	Yeah! MACH4 I have been mentally blinded with this Good job!

Shindanaide's CrackME_15lug2015

Download CrackME_15lug2015.zip, 4 kb (password: crackmes.de)
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Funny CrackME in Javaù
Crack the file, review and write a tutorial.
Hint: Java 8 :)

Difficulty: 1 - Very easy, for newbies
Platform: Multiplatform
Language: Java

Published: 29. Jul, 2015
Downloads: 423

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Solutions

Solution by FedeWar, published 23. sep, 2015; download (637 b), password: crackmes.de or browse.

FedeWar has rated this crackme as quite nice.

Solution by acruel, published 07. aug, 2015; download (2 kb), password: crackmes.de or browse.

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Solution by klefz, published 07. aug, 2015; download (2 kb), password: crackmes.de or browse.

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Solution by Coderess, published 07. aug, 2015; download (939 b), password: crackmes.de or browse.

Coderess has rated this crackme as quite nice.

Solution by mrmacete, published 07. aug, 2015; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Coderess 29. Jul 2015	Thanks for quest, I can solve this one :)
Shindanaide Author 29. Jul 2015	@coderess you're welcome :)
Shindanaide Author 16. Aug 2015	Thanks you for your solutions :)
FedeWar 04. Sep 2015	That was my first one, I found it very nice. Thanks.

Shism's Buggers v.5

Download buggers.zip, 1 kb (password: crackmes.de)
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This crackme is nothing special except for the import calls and section.

This is supposed to be easy.... All you have to do is tell me how it works. THERE IS NOTHING TO CRACK REALLY....

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 01. Aug, 2005
Downloads: 1162

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Solutions

Solution by deibiz_xxl, published 21. sep, 2005; download (3 kb), password: crackmes.de or browse.

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Solution by mr.schyte, published 02. aug, 2005; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

Shism's Buggers v.6

Download bugger_v.6.zip, 6 kb (password: crackmes.de)
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Now, for v.6 you have to find a secret message.Remember this is for complete noobs..... For Now. As versions get higher .... THIS WILL GET HARDER.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 16. Aug, 2005
Downloads: 1249

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by Lars_89, published 19. aug, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by Orphankill, published 19. aug, 2005; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

Xacker 18. Aug 2005	is Las_89 answer is the one? :) or thats a note only. btw, Shism, how do i tell if i find the secret msg? the program decrypts tables of strings -> do i have to insert the secret msg encrypted so it can be decrypted and so the FindWindow function is excuted?
Orphankill 18. Aug 2005	I solved it and wrote a crackme, just waiting for it to get accepted
Orphankill 18. Aug 2005	So write another crackme!
_khAttAm_ 18. Aug 2005	Yo Orphankill........ You solved it and wrote anotherrackme?? hehe.............. These mods must be on a long holiday............ Very few of crackmes/solutions are seen...........
Shism Author 18. Aug 2005	eww I just cracked it with changing 2 jumps ... I made a bad crackme lmao
Orphankill 18. Aug 2005	ROFL! My solution has been in queue for three days.... still waiting....
mr.msdn 19. Aug 2005	Aye this proved to be quite the easyness shism, will look forward to more difficult ones ;o
Shism Author 19. Aug 2005	of course it was easy... I said it was lol
neverdas 21. Sep 2005	hm ....i'll try ...later

Shism's Bugger v.7

Download bugger_v.7.zip, 7 kb (password: crackmes.de)
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Finally, got a new version released.... I've been busy with life and a protector I and DAXXOR(FREAKDROPPER Author ) are working on. Which a crackme protected by it will be released possibly by the end of this month.

Heres just a crackme I cooked up...Hope it's not too easy ;). Have fun with it.. Other versions will be coming sooner .....

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 11. Sep, 2005
Downloads: 847

Rating

Votes: 5
Crackme is boring.

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Solutions

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Discussion and comments

Shism Author 13. Sep 2005	Well need the key to defeat this crackme :).... Anyway, PM me a mini tutorial how to defeat the checks and Ill give you another hint if you give me a detailed mini-tutorial.
Oorja-HalT 14. Sep 2005	Thats a swell crackme. Surely looking forward to its solution . I am sure i would have something to learn
Shism Author 02. Oct 2005	The key is in the data of the container.... which holds the exe and txt file. The key is crc32 hashed ..... Someone give a solution already jeez.
Shism Author 03. Oct 2005	The container is the rar file....
pants 02. Jan 2006	Crackme is broken on some versions of Windows/SPs - either not working at all or (worse) further screwing up the (already broken) key schedule. HINT: http://webster.cs.ucr.edu/Page_win32/WindowsAsmPgm/html/Ch03.html#1005288 I'd be very interested to know if the author sucessfully managed to bf this him/herself in a reasonable timeframe (without _any_ knowledge of format of src key) - I'm strongly suspecting not...
Shism Author 02. Jan 2006	The key schedule is not broken.I just didn't implement a check for the correct key and it was implemented that way.If you keep pressing go ... A messed up key will show up. You'll have to restart the program.I left two solutions to the crackme,one way is bruteforcing the Rc6fish or cracking the crc32 which is hidden outside the crackme itself. After cracking the crc32 hash, you get the password to input. You will know the key,if you a readable english word....
pants 02. Jan 2006	Thanks for the quick reply ---> The key schedule is not broken. It is broken on some versions of Windows (see above). Without guessing it's impossible to know, with certainty, which pbox value was used and hence the resulting key schedule seed. I don't think you'd be giving too much away if you were to state the values of all registers POST-movemem - you'd just be fixing one of the bugs. ---> I left two solutions to the crackme,one way is bruteforcing the Rc6fish or cracking the crc32 which is hidden outside the crackme itself. I'm aware of both, but both are dependent on a 'working' key schedule - one directly, one indirectly. I have been concentrating on the rc6 bruteforce as the 'crc' clues were extremely vague and appeared to be an afterthought. RC6 Rc6 dictionary attack - over 100 dictionaries didn't shown anything. Each was tried as AllUpper, AllLower, UpperFirst, Leet and natural. Rc6 bruteforce attack - been running for 2 days now. Day one was a collection of _feasible_ key sets and key sizes. Day two+ is all useable chars. Sucessful bruteforce attack is looking less likely the longer the search goes on, hence my original question - given the src key, is it reasonable to continue with a bf of the rc6 _alone_? Of course, both dictionary and bf would be screwed up if the wrong register values were guessed when fixing the key schedule... CRC The information provided is extremely vague, but it's looking increasingly like this is the only feasible way to solve this. Exploiting weaknesses in CRC would reduce required bruteforce range significantly (^4), making keys of 8-12 digits feasible (bf of x digits produces x+4 digits of output, once you've calculated a correcting crc). Whilst writing this I hacked up a quick CRC crack+bf - ~10% if all 12-digit [a-z] == ~5 million CRCs that match - therefore the rc6 decryption/validation stage will still be required (aasuming dictionary attack failure was genuine) - which takes us back to the broken key schedule... To recap: _How_ to crack this crackme is known. Bruteforcing rc6 doesn't take much thought, just lots of electricity. 'Cracking' CRCs is well documented and the math is cheap. What _isn't_ known, with any confidence, are the register inputs to the key expansion routine on which both are dependent. It might work on your machine, but it certainly doesn't work on mine.... :(
Shism Author 02. Jan 2006	what os are you using?
Shism Author 02. Jan 2006	Here are the registers right before the call. of movemem eax = 0 ecx = 77F59037 edx = 00140608 ebx = 0 esp = 00B4FF84 ebp = 00B4FFA4 esi = 7FFDD000 edi = 7FFDF000
pants 03. Jan 2006	---> what os are you using? One that respects Intel/Win32 ABI register conventions. I'm not trying to be funny - that's the only answer that's relevant. If this answer makes no sense to you then I'd suggest you take a look at the link provided above. ---> Here are the registers right before the call. of movemem Thanks, but I truly hope you can see why they are irrelevant. There were a number of questions in the previous post that remain unanswered. So I'll be more specific:- [1] What are the values of eax and ecx IMMEDIATELY AFTER the call to RtlMoveMemory? [2] Can you see why these values might be different on other versions of Windows/SPs? [3] Can you find other instances where you've made similar assumptions in this crackme? [4] Can you see how they would hinder attempts to solve this crackme? [5] Can you see that the RtlMoveMemory one means some users will have to guess the inputs to the key expansion? [6] Have you successfully bruteforced this yourself (rc6 alone) without knowledge of the source key? [7] Given this particular source key, is a bf of rc6 alone even _feasible_? [8] If you don't consider it's too much of a clue, roughly what kind of keyspace and/or alphabet are we talking about? Question [8] is the only one that involves any kind of 'hint' - I'd prefer not to ask, but having no confidence in my 'guessed' schedule I'm left with little choice. I gave in and added a CRC 'crack' stage to speed things up, but I'm still not seeing much love from the bruteforcer. Either the keypace is insane or I guessed the wrong fix... A good deal of effort has gone into this over the last 2 days - not just computational. Unfortunately, the stumbling blocks have really had nothing to do with any kind of protection. I'd prefer it if others didn't have to suffer as much as I have getting the thing to work - particularly when it had so much potential.
Shism Author 03. Jan 2006	[1] What are the values of eax and ecx IMMEDIATELY AFTER the call to RtlMoveMemory? eax = 1048 ecx = 0 [2] Can you see why these values might be different on other versions of Windows/SPs? Yes, I understand [3] Can you find other instances where you've made similar assumptions in this crackme? ??? Don't understand. [4] Can you see how they would hinder attempts to solve this crackme? Yes [5] Can you see that the RtlMoveMemory one means some users will have to guess the inputs to the key expansion? Yes [6] Have you successfully bruteforced this yourself (rc6 alone) without knowledge of the source key? Rc6 no... Crc32 hash yes [7] Given this particular source key, is a bf of rc6 alone even _feasible_? No, the bruteforce of crc32 yes. [8] If you don't consider it's too much of a clue, roughly what kind of keyspace and/or alphabet are we talking about? 16 characters ok let me reduce your keyspace by alot. Numbers = 1-5 ( no 0,6,7,8,9) Only 2 numbers 5 Lowercase letters 8 uppercase letters 1 special character= There is your huge clue :)
pants 04. Jan 2006	---> [1] Aha! Thanks, now I can correct the rc6 stage... :) ---> [2] [4] [5] Excellent! ---> [3] e.g. ebx in the dialog (as used by the CreateThread calls) ---> [6] [7] Good to know, but unfortunate. Without your posts in this thread I don't think I'd have connected the everything-is-byte number with 'crc32 of the key'. Interesting that you confirmed you've personally bf'd at least the crc stage - that gives me hope... ---> [8] ...And the hope turns to despair... :( You gave a far bigger clue than I was expecting, but - now that I see it - I'm glad you did. Assuming we can 'guess' the 2 numbers, and assuming the special char is (literally) '*' and assuming we have a magic computer that can process 1 billion keys per second, then it would take something like 222 billion years to cycle through that key space. Thankfully, reducing the key space by expoiting the crc reverse brings this down to a much more reasonable 24,000 years. Well, that was fun! If anyone has need for a working bruteforcer for this then let me know... :) All joking aside, and as painful as this was, I'd still like to say a big thank you for putting this crackme together - it was a nice coding and research excercise. Good luck, and a happy New Year! /pants.

Shism's Deobfuscate #1

Download Deobfuscate1.zip, 976 b (password: crackmes.de)
Browse contents of Deobfuscate1.zip

Your goal is to create a tool to deobfuscate the code and reverse it to it's normal order.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 15. Aug, 2007
Downloads: 891

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by zefremi, published 21. aug, 2007; download (157 kb), password: crackmes.de or browse.

zefremi has rated this crackme as awesome.

Discussion and comments

Zeus13i 15. Aug 2007	Hey; I need some clarification. All I see is a .exe ... how do we view the actual code/assembler? NB: I'm uber n00b - please don't flame me!
Shism Author 15. Aug 2007	You can download http://www.ollydbg.de/
noukeys 17. Aug 2007	I can´t stand, when i run te exe it not do anything. :( *Sorry for my english
razor1911 17. Aug 2007	download assembler and fix jump codes very easy..
Shism Author 17. Aug 2007	The goal is to create a tool to fix the jump codes and reverse the code... razor1911 : Can you create the tool ?
zefremi 18. Aug 2007	Alright, I 've created the tool what I do now? Should I write a tutorial? I am new on reversing.
Shism Author 18. Aug 2007	Well, you could write a very small tutorial and submit it as a solution with the tool and the source code.....
Shism Author 21. Aug 2007	Good job zefremi :) . Get ready for version 2 soon. I'll still leave it as a level 1 crackme. Now, all you have to do is to modify the tutorial and modify the tool :).

Shism's Give Birth v 1.2

Download CrackThis.zip, 52 kb (password: crackmes.de)
Browse contents of CrackThis.zip

This crackme takes a bit of time to accomplish. It is packed crypted and such. After,your done with those their's a little neat trick for fun .......

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 07. Oct, 2004
Downloads: 1079

Rating

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Solutions

Solution by BoR0, published 11. oct, 2004; download (320 b), password: crackmes.de or browse.

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Discussion and comments

Shism's Shism's KeyGenMe 0.1

Download SKeygen.zip, 10 kb (password: crackmes.de)
Browse contents of SKeygen.zip

Just make a keygen... If you can :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 20. Nov, 2005
Downloads: 1071

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by deroko, published 07. dec, 2005; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

Seco_1 05. Dec 2005	I've been working on this crackme and I have some questions. Havent been doin this very long, they might sound stupid :) Anyways: It seems that the prog generates a different correct serial for the same name each time it is run. How then can you make a keygen without patching? Or is patching the only way? Or am I missing something? Or is this a bug? What was the rating before it was changed to 1?
Shism Author 06. Dec 2005	This is a keygenme and patching is only allowed to make a self-keygen...... Meaning making the program spit out the correct serials itself. Im sorry if the algorithim ( I rock) is uncrackable or is it????
Shism Author 06. Dec 2005	Admins you can increase the difficulty as high as you deem necessary... Because I am using a "uncrackable" algorithim ; ). And Don't start bashing me people
Shism Author 06. Dec 2005	There should be a difficulty rating of 10 for this crackme! P.S : Joke :( I know it was lame...
ultrasound 06. Dec 2005	Shism, I still stand by the fact that using random number, however uncrackable, is not realistic for a protection scheme, which is what crackmes are supposed to represent.. even if the app is self-keygenned it can never produce a valid serial.. If a protection scheme is to work, then the author of the program should be able to generate and distribute working serials for their application, here this is not possible. I know you said you would accept my self-keygen but I havent got around to finishing it yet as I had problems trying to display floating point number in a message box and havent had time to look again since.. The problem is even with all the effort to keygen the app a keygen is still worthless, its like asking 'what number am I thinking of?' ... '5?' no I was thinking of '123'.. 'what number am I thinking of now?'
Shism Author 06. Dec 2005	No one said it would be impossible to use this in a real life protection scheme.... There are possible ways to do it...
Knight 06. Dec 2005	I haven't looked at this, but well in TheHyper's sixth crackme there was also used random numbers. Just the seed was not random. Duno, but maybe here's the same. Just a guess... Regards, Knight
deroko 06. Dec 2005	yup you can fish key at fcomp qword ptr[ebp-34] but it will change all the time. solution is only to patch, I don't see any other option, even coding loader to get key won't help...
Shism Author 06. Dec 2005	Yes only way to crack this is a patch....I was trying to see if this was keygennable and it isn't... So you can take off 1 and 2 crackmes of mine..If everyone think's its impossible to crack this without a patch.
Shism Author 07. Dec 2005	The purpose was to see if anyone could crack the random number generator.... Plus This is a keygenme ..... not a patchme
deroko 08. Dec 2005	sure, keygenme that cannot be keygenned
Shism Author 08. Dec 2005	That is correct :)

Shism's Shism's KeygenMe 0.2

Download SKeygen.zip, 7 kb (password: crackmes.de)
Browse contents of SKeygen.zip

This is version 0.2.... I increased the difficulty of the keygeneration and added some suprises ;)

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 25. Nov, 2005
Downloads: 575

Rating

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Solutions

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haggar 18. Jun 2005	Does this crackme has a bug? I solved it , sometimes serial for level4 works and sometimes not. Reason is here 00401449 MOV EDI,DWORD PTR SS:[EBP+14] value [EBP+14] is used for XORing later, but this value is not constant and I don't know on what logic it changes. One time it's 10B6A50D and second time is D4FEE33B.
GR33d 19. Jun 2005	oh yes.... in my case it was 9448834Ah .... strange lol i couldnt find out the logic too : MOV EDI,DWORD PTR SS:[EBP+14] .... but it worked
CuTedEvil 19. Jun 2005	I'm checking level 4.. <esi doesn't inceremnt in the loop, and all solutions seems to be wrong for this level!, you all failed to get the correct magic value, so i'll check it>
CuTedEvil 19. Jun 2005	Crackme is OK! You just don't know where this value (which is sometimes is constant, n sometimes is not :P) comes from.. Just pay more attention, ur overlooking sth.. CuTedEvil
ap0x 19. Jun 2005	It works ok, i solved it... Very nice crackme for newbies... Good work!
SunSatION 19. Jun 2005	Yes, it works perfectly here!
m@rio_crk 19. Jun 2005	this crkme is very good for newbies, haggar,GR33d: this [ebp+14] comes from stack, check the parameters of the actually call..
haggar 19. Jun 2005	Yep, I found it. I didn't pay attention first time since name/serial check are reall easy so didn't expected a trick. Ha ha, got me.
noops 20. Jun 2005	hmmmmmm nice work.IM suprised
bgrimm 15. Jul 2005	Just a technical note on the Solution posted by phuegy: Stated in solution: We loop through our name again, XORing every char with that magic value, SHLing the result by 2 and summing these values up at memory location EBP-8. ------------------ Actually the code only operates on the first character of the entered username. which is XOR'd and summed a number of times equal to the length of username. 0FB606 /MOVZX EAX,BYTE PTR DS:[ESI] ^^^^^^^ esi is never incremented in the loop, so the first character is always used. therefore, any username with the same first character and the same length will generate the same serial. nitpicking but that's just me. Regards, -bg
phueghy 24. Jul 2005	bgrimm, thanks for pointing that out. Actually in my keygen I did what you said, but the solution states otherwise. I shall update that and maybe improve the code a little when I find some time.

Silver's Silver's DX Crackme #1

Download silverdxcrackme1.zip, 278 kb (password: crackmes.de)
Browse contents of silverdxcrackme1.zip

ALL REVERSERS PLEASE MAKE SURE YOU READ THE README IN THE ZIP BEFORE BEGINNING, THIS WILL SAVE YOU A LOT OF TIME AND FRUSTRATION.

This crackme was specifically written to demonstrate simple protection and obfuscation techniques using DirectX. This is not a theoretical crackme where the solution is utterly random (ie: click here, press this button, hold for 5 secs etc). The style used in this crackme is absolutely viable for real application protection.

If you know DX and are a competant reverser this will probably be a level 2 or 3. If you are new to this then it could be anything up to an 8.

The purpose of this crackme is to demonstrate some principles of DX apps and provide a testing/playground for learning. So if you do manage to crack it quickly (especially if you do it through luck), take some time to look around and see what else is going on. I'll be happy to answer questions etc, contact details are in the readme. When this crackme is beaten I'll release a version that concentrates on the DX aspects for people to play with.

MD5 of zip for your peace of mind: 4B3FE5E0F7D14762F234EB9956044385

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 02. Nov, 2006
Downloads: 903

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Solutions

Solution by TheColonial, published 10. apr, 2007; download (1174 kb), password: crackmes.de or browse.

TheColonial has rated this crackme as awesome.

Solution by waxfordsqueers, published 08. jan, 2007; download (171 kb), password: crackmes.de or browse.

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Discussion and comments

red477 03. Nov 2006	Good idea writing such a cm with DX.
Silver Author 06. Nov 2006	Thanks :) Looking forward to seeing how people get on with this one.
Silver Author 09. Dec 2006	One month on, nobody beaten it yet! A reply to people who have asked, if the crackme crashes while you're working on it this is not a bug, it's deliberate.
TheColonial 16. Mar 2007	I've nearly finished this crackme. My tutorial is up to 31 pages already! I just need to defeat the encryption at the end (damn Blowfish :)).
TheColonial 08. Apr 2007	Hi guys, I've just submitted my solution. I worked very hard to give you as much information as I could, I hope you find it interesting. Silver - I now know your password :)
boonz 10. Apr 2007	kickass-solution, very nice work really!
TheColonial 10. Apr 2007	Thanks very much Boonz. It took me a little longer than I wanted, but Blowfish was new to me at the time (so that's my excuse!). Cheers :)
Silver Author 11. Apr 2007	TheColonial - absolutely bloody outstanding work, sir, and a great writeup. You did an excellent job there. One note for you, the DInput crash is deliberate. I was working on the principle that in a commercial DX game a user will never lose focus, so I just junk lost devices etc with the idea of annoying people using a debugger. Also another little point for you, the DInput keyboard handling is non-exclusive. I did this to show WaxfordSqueers some DX tricks - as you spotted, some chars are put into the keyboard buffer through WM_CHAR, others are put in through the DInput keyboard handler. Anyway once again, excellent work. Very impressed you got the password!
TheColonial 12. Apr 2007	Hello Silver, I knew that the crashes were your doing ;) I know that for the most part the game developers (I used to be one ;) hence the background knowledge of DX) handle things slightly differently, but you did what you did to add a greater challenge - which was great. Thanks very much for your feedback, I'm glad you approve of the writeup. Also thanks very much for writing such an entertaining crackme, I had a blast solving it, and I enjoyed writing up the solution. Now, time to finish my GPU crackme ;) See ya!
Silver Author 15. Apr 2007	Nice :) You used to be a game dev, eh! I wonder if we knew each other in a previous life.... :) Glad you enjoyed it!
TheColonial 16. Apr 2007	hehe. Quite possibly ;)

SimpleData's SimpleData's KeygenMe #1

Download KeygenThis.zip, 130 kb (password: crackmes.de)
Browse contents of KeygenThis.zip

This is the first keygenme I have coded.
I hope you'll enjoy it.

__RULES__
- No Self-Keygenning or cracking allowed.
- Find a correct serial or write a keygen in any language.

If you need any help solving: selcik.can[at]gmail[dot]com

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 15. Jun, 2009
Downloads: 1057

Rating

Votes: 10
Crackme is boring.

Rate this crackme:

Solutions

Solution by liadav, published 18. jun, 2009; download (132 kb), password: crackmes.de or browse.

liadav has rated this crackme as nothing special.

Solution by MCxCodex, published 18. jun, 2009; download (8 kb), password: crackmes.de or browse.

MCxCodex has not rated this crackme yet.

Solution by KcDaRookie, published 16. jun, 2009; download (1 kb), password: crackmes.de or browse.

KcDaRookie has rated this crackme as boring.

The submission of solutions is closed.

Discussion and comments

SimpleData Author 16. Jun 2009	No one yet, I didn't think that it was that hard. :)
cobrasniper555 16. Jun 2009	Yeah, I posted a while ago that I had three serials that worked for my name. I created a keygen as well but I'm working on the solution. It was fun. =D
Ganoes Paran 16. Jun 2009	was pretty easy lol anyways, would do a keygen but meh user - ganoes paran pass - 121101031199
The So;X 16. Jun 2009	i am getting 4 keys for my name name : The So;X pass : 811084662 OR 84956628 OR 66285884 OR 84956628
omeromeromer 19. Jun 2009	thx!! i loved this crack!! hey bro can any tell how to make this key gen??? pls
flipflop 26. Jun 2009	The first real crackme I solved :-D
qHF; 27. Oct 2009	This one was fun. I got all three methods of generating the key. But as soon as you got the first way it wasn't hard to get the others. You just had to put in a little extra effort to look.
PimpDawg 30. Jan 2010	Thank you for writing this CrackMe. This is the first CrackMe that I wrote a KeyGen for. No more key phishing for me :)
bhsiao 27. Aug 2014	Solution for all three serials in C: http://codepad.org/NeyC0SfQ

simple_re's s!mple CrackMe v0.2

Download CrackMev0.2.zip, 158 kb (password: crackmes.de)
Browse contents of CrackMev0.2.zip

Welcome to my 2nd crackme.

This crackme is designed to be broken by (preferably) being serial phished, keygenned, or patched (patch should be easy).

MOD: Keygen is the acceptable solution.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 04. Feb, 2013
Downloads: 531

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Solutions

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Discussion and comments

Fresco 06. Feb 2013	what's the anti debug method ?
simple_re Author 06. Feb 2013	Hey Fresco, there are a few anti debug checkpoints, NtQueryInfo, IsDebuggerPresent, etc.
TheRetroSpectrum 11. Feb 2013	Aww darn, it knows me too well! It knows I'm a reverser ;D
tamaroth Moderator 11. Feb 2013	You have forgotten to strip the crackme of debug symbols, everything's visible.
simple_re Author 11. Feb 2013	Well then it should make it a lot easier for you to post a solution : )
Fresco 11. Feb 2013	i'm stuck, not even one of those anti-antidbg plugins work; :) but that's actually good cuz it forces me to find it myself :) thanks for the nice crackme :)
simple_re Author 12. Feb 2013	Some of the plugins might work in Olly but not all. IAT is still in tact though, so maybe try starting there as all (except one or two) anti debug tricks are reliant on win32 API calls. Don't want to reveal too much, but pay attention to the LoadLibrary calls, the rest should be transparent. Thanks for the feedback Fresco, I appreciate it. Stay tuned for my next crackme!
loizos 01. Mar 2013	Hey i wanted to ask how you can actually crack this program without reversing it.I am noobie so please help >.>
simple_re Author 04. Mar 2013	loizos - Cracking this program without reversing it would be like frying eggs without heating them, maybe it's possible but I don't think so : ) I'd recommend that you google 'lena's reverse engineering tutorials' and start with the first one, they are well done and you'll learn a lot.
loizos 30. Mar 2013	Thank you but i already learned how to do it :)
oXYgen 25. Mar 2014	I know it's late but @Fresco you can use Phant0m It work w/ OllyDBG 1.1
sapphira 30. Mar 2014	serial is based on Node-Name and IP (the mac is retrievd too, but i did not investigate if/how it is incorporated into the serial) Basic serial format is as follows: UserName[3]\|\|IP_addr[1]\|\|8-Numbers\|\|Node_Name[0] Interesting Functions are at 0x4091f8 and 0x408f1a

simple_re's s!mple Crack Me v0.3

Download CMv0.3.zip, 159 kb (password: crackmes.de)
Browse contents of CMv0.3.zip

Hey reversers, welcome to my third crack me.

Rules: Patching/Serial Phish/Keygen

Goal is to get to correct input, thanks for reversing!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 14. Feb, 2013
Downloads: 331

Rating

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Solutions

Solution by baderj, published 29. apr, 2015; download (156 kb), password: crackmes.de or browse.

baderj has rated this crackme as quite nice.

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Discussion and comments

tamaroth Moderator 19. Feb 2013	Why would you limit name length to 6 characters?
tamaroth Moderator 19. Feb 2013	Also: name: tama serial: 0012966278P serial is based on IP address, MAC address and host name, so it probably won't work on your machine.
simple_re Author 19. Feb 2013	God job tamaroth. If you could explain what each digit is, or at least the important ones, maybe they could accept that as a solution? Good work. Thanks for reversing.
tamaroth Moderator 19. Feb 2013	I'll make a short solution with a keygen soon.

simple_re's s!mple UnpackMe v0.1

Download UnpackMe.zip, 6 kb (password: crackmes.de)
Browse contents of UnpackMe.zip

Hey all,

Welcome to first UnpackMe. This is not an unpacking routine in the sense that it can make your code smaller. More of a simple protection scheme. There is no anti-reverse/anti-debug code.

This .exe will only create a window. The goal is to restore it to it's original, transparent state as the compiler provided.

Feedback is always welcome, and thanks for reversing!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 25. Feb, 2013
Downloads: 679

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by devrandom, published 08. aug, 2013; download (5 kb), password: crackmes.de or browse.

devrandom has rated this crackme as boring.

Send a message to Sinclaire »

View profile of Sinclaire »

Discussion and comments

adwi32 16. Mar 2013	strange. strange. strange.
mausy131 17. Mar 2013	The program seems to patch itself while debugging it. Am I right?
Flickayy 19. Mar 2013	I managed to get around the anti-debugger protection and I know the packer you used, almost got it unpacked.

Sinclaire's SinCZ0R

Download Crackme_#1_(SinCZ0R).zip, 167 kb (password: crackmes.de)
Browse contents of Crackme_#1_(SinCZ0R).zip

Well sorry guys about the rating, but i don\'t know actually how to rate it (as the title says everything\'s relative) anyway not a bad one for a start and check out the crackme archive for more details and info, have fun :), oh BTW this is more of a 2 in 1 crackme.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 16. Nov, 2004
Downloads: 851

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Sinok's Antidebugging piece of shit keygenme

Download keygenme.zip, 95 kb (password: crackmes.de)
Browse contents of keygenme.zip

Create a keygen and post the source code. Your solution is not considered valid without a working source code.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 10. Feb, 2010
Downloads: 514

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Discussion and comments

Sinok Author 12. Feb 2010	So no one cracked this yet?
Zakne 12. Feb 2010	Name : Zakne Serial : l000of210
Sinok Author 12. Feb 2010	Good job. Now write a keygen and submit a solution. :)
hound 12. Feb 2010	The anti-debug is neat and I had a good bit of fun making a nice way around the majority of it. The serial can be fished though :-)
mcourteaux 13. Feb 2010	Were did you learn to crack? Just stay trying and searching? PS: How long does it take before a crackme I uploaded is visible for others?
NicoPyright 15. Feb 2010	Username: NicoPyright Password: bh00dp3zsjhiu330 I don't know how to write a keygen :-(((
Xspider 15. Feb 2010	Name: Xsp!d3r Serial: r0000e4s250 i guess the algo is a little bit long!! and the antidbgs are strong g0od job Sinok ;)
dahiphop 21. Feb 2010	Name: DAHipHop Serial: bb001jq1pq270 --------------- 00401BF7 \|. FFD7 \|CALL EDI ; [IsDebuggerPresent --------------- ->You can use plugin ...or nop.
Sinok Author 22. Feb 2010	@dahiphio: That's not the only anti-debugging trick.. is it? Is this the only problem you've encountered?
_ghandi_ 13. Mar 2010	Possibly you could refrain from posting all the details in the page for the keygenme, because its now spoiled and half the work is done. Maybe a solution is a better place for the solution? HR, Ghandi
andrewl.us Moderator 14. Mar 2010	agreed, comment removed, please be considerate TQN
asterix 17. Nov 2012	Username: asterix Password: r000fsjy250

Sinok's Archaeological Site

Download Crackme.zip, 128 kb (password: crackmes.de)
Browse contents of Crackme.zip

You gotta dig real deep :D

Instructions in the readme.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 02. May, 2008
Downloads: 902

Rating

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Solutions

Solution by DigitalAcid, published 07. may, 2008; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 03. May 2008	Heh. I can patch it on 2 different locations now to make it show "Awesome", but didn't find any password yet =).
DigitalAcid 03. May 2008	Found it. Didn't have to dig that deep :). Not bad.
Sinok Author 04. May 2008	Good job :) I don't think a solution is necessary for a crackme like this, but if you have the time, it'll be awesome :D
Sinok Author 07. May 2008	Great solution DigitalAcid =)
DigitalAcid 07. May 2008	Imagine if you used alot more calls, we would have to dig alot deeper =). I forgot to mention in the tutorial that i had set a Hardware Breakpoint, because i saw some pointer and that's the weak spot of this kind of protection ;).
Sinok Author 07. May 2008	DigitalAcid, how can I contact you? I've got a crackme I want someone to try out before I upload it to crackmes.de :)

Sinok's Crackme #1

Download Crackme.zip, 133 kb (password: crackmes.de)
Browse contents of Crackme.zip

Find the password, no patching, enjoy, and good luck.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 01. Mar, 2008
Downloads: 1701

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Kalippan, published 08. mar, 2008; download (1 kb), password: crackmes.de or browse.

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Solution by DigitalAcid, published 04. mar, 2008; download (2 kb), password: crackmes.de or browse.

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Solution by Iñaki Viggers, published 04. mar, 2008; download (1 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Dynasty 02. Mar 2008	Owned in 2 seconds :)
omnitron 03. Mar 2008	I´m a complete dummie and i can´t get it... could you Dynasty post the solution please?
DigitalAcid 03. Mar 2008	I wrote and uploaded my tutorial yesterday... Maybe others have written one also.
Sinok Author 03. Mar 2008	Can't wait to see your tutorial ;P And I deleted someones message (forgot his nick, damn) don't post the password here :\
MegaGod 03. Mar 2008	Gawk!! I got messed around. If anyone solve this, Would you mind publishing your source? Sinok.
Sinok Author 03. Mar 2008	People already solved it, and I don't mind sharing the source, you can private message me and I'll send it to ya :)
Kassak2k 03. Mar 2008	Owned in 1 sec lol, very easy;
Sinok Author 04. Mar 2008	So post a solution :)
omnitron 04. Mar 2008	Too many easy Owneds but too less solutions :(
Kalippan 04. Mar 2008	i have submitted a solution.....
xylitol 05. Mar 2008	@Kalippan: me too
Sinok Author 05. Mar 2008	Great solutions guys ;D
Kalippan 06. Mar 2008	mine wuz rejected.... moderators said it needs more explanation... i will resubmit it....... this time with more explanation......
Kalippan 06. Mar 2008	but actually it wont be necessary.... the 2 solutions are pretty good......
Kalippan 06. Mar 2008	resubmission made........
UnuSec 07. Mar 2008	Hot Spot at 004143A7 :p
Sinok Author 09. Mar 2008	Nice solution Kalippan, tho alot of dots (...)
roante 09. Mar 2008	LoL, this was my very first crackme. Got it in 2.5 hours :P
roante 09. Mar 2008	Btw, I'd be intrested in the real source, isn't it available somewhere?
Kalippan 11. Mar 2008	thanks................................ :)
john134 18. Mar 2008	Got it in 1.5h :) this was my very first crackme also. I'm so happy :)
n3wbi3 21. Mar 2008	Hi I've a question to this crack: How I can do this? look at EDX... // the good serial, we can see it in the EDX register :) <- this are comments in the solutions (Which button i've to press... or where is the function? sry 4 this question, but it is my first crack, my dessambler is Olly
Sinok Author 21. Mar 2008	Look in your upper right corner of the screen, you should see olly's FPU (registers) "section". Look at the value of EDX.
n3wbi3 21. Mar 2008	Hi, thank you for the answer, but.. i don't find this section, there is a picture of my olly: http://img222.imageshack.us/img222/9864/ollyandedxvalueey6.jpg In EDX isn't a password... is this the correct section?
Sinok Author 21. Mar 2008	I have no idea what you wrote there, but the password isn't there. Step over one more time :P
n3wbi3 21. Mar 2008	Hi! It works! I had forget to create a breakpoint... thx for your help, Sinok!
Sinok Author 22. Mar 2008	No problem, enjoy :)
Fukc 25. Mar 2008	Solved it too as my first crackme program. Didnt want to ruin it with "Search text string". Digging took some time :p (10 mins) Thanks!
Muns 28. Mar 2008	lol nice and easy. Took me a humble 10 mins :)

Sinok's Tiny KeygenMe

Download Release.zip, 4 kb (password: crackmes.de)
Browse contents of Release.zip

Tiny KeygenMe (6.50kb) by Sinok.

Make a keygen and upload a tutorial :)

Notes:
- Yes, the program crashes when you click on check. It's not a bug.
- The program is really clean, finding the "check" is REALLY easy.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 13. Sep, 2008
Downloads: 879

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by crackDog, published 15. sep, 2008; download (103 kb), password: crackmes.de or browse.

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Discussion and comments

Sinok Author 13. Sep 2008	The program was updated while the description wasn't, the new executable doesn't crash when you click on check. :)
lgtngstk 13. Sep 2008	IMHO anti Olly a little much for a level 1.
simonzack Moderator 14. Sep 2008	i don't get it, why would u say "It's not a bug." in the old exe? if enter right serial, would it say "good job"?
Sinok Author 14. Sep 2008	Well, yeah, that's the point, it crashes the program if you don't enter a valid serial :\ @lqtnqstk: Really? thanks xD It's not really difficult, if you need a hint PM me..
lgtngstk 14. Sep 2008	I managed to bypass it, but thanks anyway.
Sinok Author 15. Sep 2008	Great solution crackDog, I was sure someone will notice the "sasasas" string xD Next time post the keygen source if you can ;]
obnoxious 15. Sep 2008	well keep it up carckdog.......
cradiator 15. Sep 2008	The crackme is so strange you know? There is a lot of waste code in that. such as the string "wduf{hy", and "sasasas" is just used when testing the username is 7 chars or not. the app also retrive the volumn serial but not use it. Debuging waste code really spend me plenty of time XD.
Sinok Author 15. Sep 2008	I actually planned on using the serial at first lol ;P
crackDog 15. Sep 2008	Thank's Sinok, this Crackme was quite tricky. Might be to hard for stage 1 maybe, but I (the n00b) finally found a solution, so maybe it's right at lvl 1. Good to hear, that those strage strings were just fake ;-) Next time I'll post the source as well.
crackDog 15. Sep 2008	PS: Did you know, that when you use exactly 12 characters for the username, the serial will be exactly the same ? ;-)
Sinok Author 17. Sep 2008	That's why the "sasasas" string was used.. lol Didn't know I had the same bug with 12 characters >.<

sir liquid's crackme #1

Download sl_cm1.zip, 11 kb (password: crackmes.de)
Browse contents of sl_cm1.zip

serial, keyfile, cd check (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 02. Dec, 2000
Downloads: 1268

Rating

Waiting for at least 3 votes
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Solutions

Solution by psycho arjani, published 02. dec, 2000; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

skapunky's Renascense Crackme

Download CrackMe_Renascense_1.zip, 14 kb (password: crackmes.de)
Browse contents of CrackMe_Renascense_1.zip

This crackme are programmed in visual basic. Search a ID and username valid, or change jumps on the memory. It's easy and good for a newbie.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 19. Sep, 2007
Downloads: 1934

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by Sinok, published 06. mar, 2008; download (621 kb), password: crackmes.de or browse.

Sinok has rated this crackme as boring crap.

Solution by fromTurkey, published 14. feb, 2008; download (759 kb), password: crackmes.de or browse.

fromTurkey has rated this crackme as nothing special.

Solution by El_PuPaZzArO, published 19. sep, 2007; download (560 b), password: crackmes.de or browse.

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Solution by tay777, published 19. sep, 2007; download (21 kb), password: crackmes.de or browse.

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Solution by br0ken, published 19. sep, 2007; download (42 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

br0ken 15. Sep 2007	This is more like a level 0.5
tay777 16. Sep 2007	ya this should be in very easy for noobs
eXanock 20. Sep 2007	Hopefully, this crackme will help me get into reverse engineering :D
kosternokke 03. Feb 2008	the first one i solved !!!! ok easy but for a newbie very good !!! thank's
fromTurkey 04. Feb 2008	hi skapunky. i have cracked your code and find the serial. It was easy but, do i write a keygen for it? Thanks for all.. ;)
fromTurkey 10. Feb 2008	I have submitted my KEYGEN for this. Thanks for all..:)
Sinok 04. Mar 2008	Submitted my video solution xD

skapunky's skrackme1

Download skrackme1.zip, 6 kb (password: crackmes.de)
Browse contents of skrackme1.zip

Well, this is my second crackme, you're to find a correct ID and pass, but fisrstly you kill the Nak window and enable de chek button. Is easy..

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 18. Sep, 2007
Downloads: 997

Rating

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Solutions

Solution by br0ken, published 25. sep, 2007; download (17 kb), password: crackmes.de or browse.

br0ken has rated this crackme as awesome.

Send a message to sKiller »

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Discussion and comments

chaise 20. Sep 2007	i can't open the ZIP file
skapunky Author 20. Sep 2007	The zip is correct...i can it.
br0ken 20. Sep 2007	Download the ZIP. It works fine.
IMPosTOR 21. Sep 2007	:-? whats your algorithm. i think it have bug. try to user [0...9] or [a..z] and set password to 0000000000 then registerd. lol ex : user : 1 pws : 0000000000 user : h pws : 0000000000 i try it for some character like user : kkkk pws : 0000000000 its registered ??? some character work with this password. [jjjj-kkkk-llll-mmmm-nnnn-oooo-zzzz] i think your algorithm can't gnerate for all character ! i want to know is this bug or someting else? this is my registration IMPosTOR 1010111011 anybody have idea
Little_Brother 23. Sep 2007	.zip wont open on my end :(
zairon Moderator 23. Sep 2007	Zip is ok, stop.
DigitalAcid 25. Sep 2007	The zip doesn't work for me with the "windows unzipper". It works with ZipZag...
br0ken 25. Sep 2007	Please ignore the Appendix - A line. It was meant to be deleted.
TiGa 25. Sep 2007	Why the Zip problem? -> This is what happens when someone sends a .rar renamed to .zip
MaZeNsMz 25. Sep 2007	zip is working with winrar
zart 25. Sep 2007	It's exactly what tiga said, it's a rar file renamed as a zip

sKiller's keyGenMe#4

Download skilLas_keyGenMe#4.zip, 2 kb (password: crackmes.de)
Browse contents of skilLas_keyGenMe#4.zip

KeyGenMe#4

Patching not authorized just keygen it without bruteforce.
It has a very litle virtual machine. some crackers will be disapointed with this :)
because this vm is so easy.

Have phun :D

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 23. Oct, 2006
Downloads: 797

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Solutions

Solution by crack, published 28. oct, 2006; download (6 kb), password: crackmes.de or browse.

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Solution by geeko, published 28. oct, 2006; download (195 kb), password: crackmes.de or browse.

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Discussion and comments

geeko 24. Oct 2006	The prog is supposed to crash after 'oops' message or is a bug?
geeko 24. Oct 2006	I think it has a small bug. the code is case sensitive and I think is not intended (after looking in the algo). Program crashes after bad or good guy. hm?!? tut coming soon
sKiller Author 24. Oct 2006	No, there isn't a bug. It's strange because you are the first who tell me that.
geeko 25. Oct 2006	Obviously I am the first since I am the only who wrote here haha :)
geeko 25. Oct 2006	Sollution submitted, but your proggy still crashes after 'good guy' message. Serial is case sensitive!
sKiller Author 25. Oct 2006	U aren't the first i submit my crackme in a other site before. I know the serial is case sensitive. But this bug is very strange because nobody got it.
crack 26. Oct 2006	I have solved this crackme too. on my computer (xp, sp2) the programm dosn't crash. @sKiller: tnx for the nice crackme
geeko 27. Oct 2006	me: i have win 2k.
geeko 30. Oct 2006	@moderators: did u ever look at the crack's solution to skiller? It seems to be from other crackme. thanks
jB_ 30. Oct 2006	geeko: crack's solution is ok, and its point of view is far better than your for this crackme. I'm pretty sure it is exactly the kind of solution sKiller was expecting.
zairon Moderator 30. Oct 2006	@geeko: I(we) read solutions before approving/rejecting them. What do you mean exactly by "it seems to be from other crackme"? I agree with jB_, I'm pretty sure it's exactly the expected solution; the main point of this crackme is the virtual machine and he (crack) hits the point discovering the vm.
geeko 31. Oct 2006	Please, just explain me these few lines from crack's 'solution.txt': ----- Target : Ms-Rem - Ring0 crackme S/N : 19B3-B639-4585-4109-9DCD-7901-E555-3119 Crackme comes with 2 - crackme.exe and focs.dll, but both of them are loaders for virtual.exe and virtual.dll... ------- Which obviously have nothing to do with this crackme thanks
geeko 31. Oct 2006	Or , first Skiller uploaded another crackme, and now this one?!?! A search leads to this (what crack reffers): Ring0 crackme by Ms-Rem Published: 15. May, 2006 Difficulty: 7 - Very hard Platform: Windows 2000/XP only Language: Borland Delphi And here we discuss: sKiller's keyGenMe#4 g'luck and watch out
jB_ 31. Oct 2006	geeko: Please, download the correct solution. There are no such lines in crack's solution. Empty your cache, maybe it will help.
crack 31. Oct 2006	by the way: this is my very first solution! a level 7 crackme is not my league
geeko 01. Nov 2006	OK i got it. smth went wrong.
Am0k 07. Nov 2006	is there any tutorial out there for writing its own virtual machine? sounds pretty interesting
geeko 08. Nov 2006	Amok, if u write tut for my 'Distil' I'll give you the sources. It uses a virtual machine which emulates the PIC processor.
Am0k 13. Nov 2006	well i'd like too, but as u can see i never craked anything, just because i cant. i tried alot of times, but my cracking skills are just not enough.

sKiller's skilLa_keyGenMe#3

Download skilLa_keyGenMe#3.zip, 1 kb (password: crackmes.de)
Browse contents of skilLa_keyGenMe#3.zip

This crackme was coded in pure asm, it has an anti-debuger trick and a special feathure. This is very easy for newbies.

You're not allowed to patch and to bruteforce, keygen only.

Sorry for my bad english.

have fun, skilLa

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 25. Sep, 2006
Downloads: 618

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by Kostya, published 27. sep, 2006; download (30 kb), password: crackmes.de or browse.

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Discussion and comments

geeko 26. Sep 2006	Your proggy does not run on my Win 2k
geeko 26. Sep 2006	What kind of trick is that? The proggy starts with 'exitprocess' ?!?!!? and we cannot patch ?!?!!
BaKaE 26. Sep 2006	patch means the algo or good-boy-jump, i believe, something like that (exitprocess) can be patch
jB_ 26. Sep 2006	geeko : no patching means that the program can be registered with a keygen without any patch. To study the algo you can obviously patch it. sKilLa: nice crackme. You should increase the difficulty now.
geeko 26. Sep 2006	Any proggy is supposed tu start before 'register it' At least we must know if that 'exitprocess' is intentionally or bug?
jB_ 26. Sep 2006	the "ExitProcess" routine is anti-debug. If your program doesn't start when you don't debug it, it is a bug. Else it is ok.
l0calh0st 26. Sep 2006	Good trick...hahaha..... geeko....look where it is jumping ;)
geeko 26. Sep 2006	U didnt understand. The proggy doesn run at all inside nor outside de debugger! I dont see any jump before the exit.I tried it on win 2000 and NT.
BoR0 26. Sep 2006	ExitProcess protection is at 004011C8. Just nop the jump.
geeko 26. Sep 2006	skiller, the prog is supposed not to run at all?
BoR0 26. Sep 2006	Ah, SEH tricks. :) Algo is pretty simple. We should trick the SEH so it lands us here: 0040116C $ 8B4C24 0C MOV ECX,DWORD PTR SS:[ESP+C] ; Structured exception handler 00401170 . 8BA1 C4000000 MOV ESP,DWORD PTR DS:[ECX+C4] 00401176 . 64:8F05 000000>POP DWORD PTR FS:[0] 0040117D . 83C4 04 ADD ESP,4 00401180 .^EB 8E JMP SHORT skilLa's.00401110 Nice crackme, anyhow.
geeko 26. Sep 2006	I passed the SEH. Now I am backtracing from 00401137
HMX0101 26. Sep 2006	I have bypassed the exitprocess and SEH sucessfully, but i can't get the first condition :P
geeko 26. Sep 2006	what first condition? at 401071 checks for the length of name.
HMX0101 26. Sep 2006	004010A0 . 8B06 MOV EAX,DWORD PTR DS:[ESI] 004010A2 . 8D3D 46304000 LEA EDI,DWORD PTR DS:[403046] 004010A8 . 8B1F MOV EBX,DWORD PTR DS:[EDI] 004010AA . 33C3 XOR EAX,EBX 004010AC . 3D 37130000 CMP EAX,1337 I know here it load the last 4 chars of the serial, and the first 4 chars of the name and xor it, but i can't reverse that :(
l0calh0st 26. Sep 2006	And it could be level 2 :)
ghostz 26. Sep 2006	Hi, HMX0101, you can reverse it easy! First routine of serial Name = ghostz Constant = 1337 hex value Inverse 4 characters ghos = sohg sohg hex value = 736F6867 1337 = sohg xor (part of serial) (part of serial) = 1337 xor sohg 736F7B50 = 1337 xor 736F6867 736F7B50 = so{P Inverse it so{P = P{os Part of serial = P{os I use 32bit calculator v1.7 by cybult ---------------------------------------------------- I bypass SEH tricks without patching, I put a Breakpoint, Hardware on execution in 40104A Run and trace with F8. Good job sKiller ;)
HMX0101 26. Sep 2006	After i leave the last message, i found the way to reverse it... Anyway thanks, ghostz :)
D4ph1 26. Sep 2006	The last part confuses me. It must be : (3rdChar)^2 - (4thChar)*68h +0A8Ch = 0 . But if we solve by 3rd or 4th char the result is wrong! I cant understand why....
HMX0101 26. Sep 2006	@D4ph1: I think it must be: ((1stChar)^2 - ((2thChar)*68h) + 0A8Ch = 0
Kostya 26. Sep 2006	Hm..Maybe it is level 1.6..
D4ph1 26. Sep 2006	@HMX0101: No I mean the second check before the second bad boy message here : 00401130 . 2BC3 SUB EAX,EBX 00401132 . 05 8C0A0000 ADD EAX,0A8C 00401137 . 83F8 00 CMP EAX,0 Not the check with "DIV AL"...
D4ph1 26. Sep 2006	Now i see what i missed :p
Kostya 26. Sep 2006	I write a solution..
EvOlUtIoN 26. Sep 2006	Solved! the first part of serial need some brain more, but is equally simple...very nice crackme!
sKiller Author 26. Sep 2006	Thanks for your nice comments. :) For the second part of the code, you just must feel it :D I think in a few days I'll code an harder one.
HMX0101 26. Sep 2006	This is a easy one, i'm waiting for a really harder keygenme :) Anyway, good job sKiller :P

sKiller's sKiller's keygenMe

Download KeyGenMe.zip, 2 kb (password: crackmes.de)
Browse contents of KeyGenMe.zip

Salut! Voici mon premier Crackme, le but est de le resoudre sans patcher
et de faire un key-File gen. Cependant vous etes autorise a patcher que pour
bypasser les antidebug.

Hi! This is my first Crackme, you should solve it without patching and do a Key-File
gen. Hovewer you are allowed to patch only to bypass the anti-debugging tricks.

Have fun :) sKiller

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 18. Apr, 2006
Downloads: 659

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Ox87k, published 18. apr, 2006; download (59 kb), password: crackmes.de or browse.

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Solution by D3z+, published 18. apr, 2006; download (121 kb), password: crackmes.de or browse.

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Discussion and comments

astigmata 18. Apr 2006	try this one: http://thebigjo.free.fr/temp/keygened.exe
Ox87k 18. Apr 2006	yes this is lv1 and not lv2.. is very easy, 5 minuts for reverse! anyway g00d job!

skirby's CrackGenMe #1

Download CrackGenMe_#1.zip, 160 kb (password: crackmes.de)
Browse contents of CrackGenMe_#1.zip

Hi everybody,

Here is my first challenge. The CrackGenMe #1
It was made for beginners but also for advanced crackers.

Goals:
- For warriors: make a keygen
- For slackers: display the success message

Peculiarities:
- patching is allowed but not code injection
- serial number is only composed of alpha-numeric characters
- no packer or compressor was used
- no tip based on computer name, hard drive number or something like that

I hope you will write a tuto if you find the solution.

Do not hesitate to ask me if you need more informations.

skirby

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 11. Feb, 2008
Downloads: 754

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by HMX0101, published 02. mar, 2008; download (175 kb), password: crackmes.de or browse.

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Discussion and comments

emery 13. Feb 2008	Who is the author of the music? I really like it
skirby Author 13. Feb 2008	I found it on http://modarchive.org The name is: The Rainy Day You could find it here: http://modarchive.org/index.php?query=the+rainy+day&request=search&search_type=filename_or_songtitle Otherwise, if you open the file into Winamp for example and have a look to the file properties you will find the author: Andrew H of England
yaaara 13. Feb 2008	If you like the sound, you can extract it with Extractor. http://www.volny.cz/nova-software/files/extr25.zip It is a XM file.
andrewl.us Moderator 14. Feb 2008	Nine threads, nine events, floating point and trig? I give up :)
skirby Author 14. Feb 2008	Hi andrewl.us, My first challenge is not difficult to solve. It contains a lot of weakness which should help the cracker to find a solution. I can tell you that it can be rather easily self keygenned. If you need help, send me a PM and I will give you hints.
skirby Author 20. Feb 2008	Congratulations to HMX0101. He has keygen my challenge successfully. Who will be the next?
Ox87k 20. Feb 2008	Good job HMX0101 but why don't you write a public solution? It would be very nice!
HMX0101 20. Feb 2008	Ok... i'll write a tut, anyway i've a many time without write somthing hehe :D skirby, good crackme... nice job ;) btw, i'm cracking second one :D (seems to be its a little bit harder than this one) :)
skirby Author 25. Feb 2008	Cool! Let me know HMX0101 if you want me to read your solution before publishing it.
KpocoboK 25. Feb 2008	Wow, cool crackme! I love killing time with kirby on gba and the music is nice. TO bad its prob hard for me but it will be first what i try when i lern to lvl 4 $)
KpocoboK 25. Feb 2008	I want to give it a 5 stars but damn dont know how to vote here/ ^(
TiGa 26. Feb 2008	In the upper-right corner of the page, there is a square called "Rating" where you can rate the crackme from boring crap to awesome. By 5 stars, you probably mean awesome. ;)
HMX0101 26. Feb 2008	Tutorial submitted :-) .. many thx to skirby for help and some improvements about the tut ;)
Ox87k 01. Mar 2008	I found a bug in your keygen HMX0101! Try this name: "asdasdasd" (without quotes). Your keygen generates me this serial M37O35J83L-I26A99G11J-K9O3H8H6E4-4BE708B1 but it seems not valid! The same with name "asdasd" (without quotes). It generates me M99M83J76L-DEBIJKAME-L6R0P1R3H8-4BE708B1, invalid. If i try the name/serial it generates me when i run it, works fine.
TiGa 01. Mar 2008	I will add "asdasd" and "asdasdasd" to the list of names I try to test a keygen. ;)
HMX0101 01. Mar 2008	Hmm... rare.. for me its generating: "asdasdasd": "M37O35J83L-I26A99G11J-P8L1C2C3L-4BE708B1" "asdasd" : "M99M83J76L-DEBIJKAME-L0G3J3F-4BE708B1" Anyway, i've fixed a little bit the keygen.. i hope it works ok now!
andrewl.us Moderator 03. Mar 2008	HMX0101: WOW! What a tutorial. I'm glad I backed out of this one. You are a warrior!
skirby Author 04. Mar 2008	Yes it is a really nice tutorial. Thank you so much HMX0101 in your interest on my challenge.

skirby's CrackGenMe #2

Download CrackGenMe_#2.zip, 236 kb (password: crackmes.de)
Browse contents of CrackGenMe_#2.zip

Hi everybody,

Here is my second challenge. The CrackGenme #2.
It was made for beginners but also for advanced crackers.

It is a little bit more difficult than previous one.

Goals:
- For warriors: make a keygen
- For good boys: find the activation code and the Kirby code for your name
- For slackers: display the success message

Peculiarities: No rule, you can do everything you want!!!

So, be without pity for my challenge.
I hope you will write a tuto if you find the solution.

Do not hesitate to ask me if you need more informations.

skirby

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 11. Feb, 2008
Downloads: 675

Rating

Votes: 5
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by grimskies, published 21. mar, 2008; download (140 kb), password: crackmes.de or browse.

grimskies has rated this crackme as quite nice.

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Discussion and comments

skirby Author 18. Mar 2008	Congratulations to grimskies. He has perfectly solved and keygen my challenge.
grimskies 18. Mar 2008	Thanks skirby, it was fun to solve it :)
rAsM 19. Mar 2008	I did a solution but i can't submit it here because it's in french. If you want to read it: hxxp://www.rem-team.webou.net/?16-2-de-skirby
skirby Author 19. Mar 2008	Hi rAsM, It is a really nice tutorial. Like grimskies, thank you very much for your hard work on my challenge.

skirby's CrackGenMe #3

Download CrackGenMe_#3.zip, 483 kb (password: crackmes.de)
Browse contents of CrackGenMe_#3.zip

Started few months ago, I have decided to release my third challenge: The CrackGenMe #3

As usual, no rule:
- For noobs => Display the "Good boy" message
- For crackers => Find a serial and a solution for The Square
- For warriors => Make a nice keygen (for the serial and The Square)
- For Gods => Same as warrior but with a nice tutorial

I hope you will be numerous to try and succeed this challenge.
It has been really hard to code, so I hope it will be hard enough to debug.
I have done many tests so I hope you won't have problem.

I really hope to have a solution for this challenge.
It would be the best gift you could do for me because I spent many time to code it.

Have fun with my last challenge.

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: C/C++

Published: 12. Feb, 2008
Downloads: 689

Rating

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Solutions

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Discussion and comments

simonzack Moderator 23. Apr 2009	RSA, TDES, vm, ... awesome, thanx for such a nice crackme, skirby :) will release solution soon
skirby Author 31. Jul 2009	Hello simonzack, Do you managed to crack my challenge? Please, let me know if you need some help. I will be glad to have a solution because nobody managed to keygen my CrackGenMe #3. I hope you don't give up to resolve it. Thanks and have a nice day.
simonzack Moderator 01. Aug 2009	yeah, ages ago pm sent
skirby Author 03. Aug 2009	Hi simonzack, Thanks a lot for your solution. It works great !!! I hope you won't be the only one to solve it. Thank you very much once again.

skjobax's CrackMe 1.0

Download CrackMe2.0.zip, 7 kb (password: crackmes.de)
Browse contents of CrackMe2.0.zip

IMPORTANT NOTE: I made it with a Trial of REAL Basic.
So, until 10 days it will unavailable.
It will close after 5 minutes.

Instructions:

1. Take off timer limit. (optional)
2. Create Keygen.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 26. Nov, 2010
Downloads: 1255

Rating

Votes: 4
Crackme is boring crap.

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Solutions

Solution by draww, published 28. nov, 2010; download (5 kb), password: crackmes.de or browse.

draww has rated this crackme as boring crap.

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Discussion and comments

skjobax Author 20. Oct 2010	I'm really sorry for inconvenience of Trial... I'll soon
draww 27. Nov 2010	you missed a very important thing when declaring types. all generated serials will be affected by this mistake. read my solution when it is approved. ;) ps: i didn't see any trial crap, we don't have to run your crackme more than 30 seconds :)
skjobax Author 09. Jan 2011	Sorry I was out for days.... I'm surprised: I'm only a newbie in .NET programming and types aren't my strongest point in that language... Anyway, I've uploaded new version, so REALBasic Trial were overwritten by .NET one.... So time limit were not in program... I've checked your keygen... but when I've compiled it, serial wasn't the same as +Infinity...
givses 13. Aug 2013	All the serials are "Infinity". Just input any character on name.

skjobax's WTF Serial protected - Round #1

Download WTFserialProtected#1.zip, 6 kb (password: crackmes.de)
Browse contents of WTFserialProtected#1.zip

My CrackMe isn't so easy and not so hard.
So, look up everything!

Unzip file and let's keygen it!

Note: This CrackMe is compressed!!!!

P.S.: Sorry for bad English

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 14. Jan, 2011
Downloads: 377

Rating

Votes: 4
Crackme is boring crap.

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Solutions

Solution by DOLEM, published 15. jan, 2011; download (6 kb), password: crackmes.de or browse.

DOLEM has rated this crackme as boring.

Solution by draww, published 15. jan, 2011; download (3 kb), password: crackmes.de or browse.

draww has rated this crackme as boring crap.

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Discussion and comments

draww 14. Jan 2011	easy to solve.. submitted my solution. name: draww serial: 10040d
DOLEM 14. Jan 2011	Lol all operation are so "stranges"! name: DOLEM serial: 10040d (because length is the same of draww) Lolz, you can do better if you want, I know xD
skjobax Author 14. Jan 2011	What a surprise! I don't thought it was so easy nor two solutions in one day! When the keygens will be approved, I'll comment... DOLEM, but have you beginned today keygenning my CrackMe?
DOLEM 14. Jan 2011	First, we are a team, if you haven't read our profile yet. Anyway, I write in name of all and no, we don't. We start keygenning your "strange" keygenme only 2 days ago... I rate it as 1: yes, it is compressed and compiled with Free Pascal 2.0 and PKlite, but you forget that in a certain address, debugger (we use Olly) will show all the procedure. Anyway.. why you said it was made in .NET if you used Free Pascal?
skjobax Author 14. Jan 2011	Yes, I've read your profile. You're italian, right? Anyway, I have compiled it with VBS2EXE, which transforms .vbs in .exe! And when I saw it was compressed, I sent a message to simonzack where I describe it was compressed, but then, when the crackme was approved, I deleted it...
draww 14. Jan 2011	@dolem: two days? actually it takes 10 min. including writing a keygen.
DOLEM 14. Jan 2011	We are "rookie" crackers, at the beginning, we haven't much experience nor the flash look as the others :) But the important thing is that we did it and together.. All the Team is happy, so we are proud!!
draww 14. Jan 2011	congratz my friends.. i didn't mean anything about being "rookie" or anything, sorry for that. ofcourse everyone has different ways approaching on targets. i appreciate your learning. with my best regards..
DOLEM 15. Jan 2011	Rookies as beginners
skjobax Author 15. Jan 2011	skjobax Author 15. Jan, 07:29 Nice graphics, DOLEM! But I think you need a best solution: how have you uncompressed it? draww, I'll see you keygen next time: I have to go now!
skjobax Author 15. Jan 2011	Ups... In effects, at addresses, you get the code; I wasn't so accurate...
iLovro 29. Jan 2011	Draww, your solution doesn't go into much detail. Could you explain to me how you decrypted the dump? I can see only half of the text. :s
DOLEM 24. Feb 2011	Have you got Olly? We got the code dumping text with that tool

skNiNe9's SKCrackMe #1

Download SKCrackMe.zip, 5 kb (password: crackmes.de)
Browse contents of SKCrackMe.zip

It's very easy, make a keygen :)

Difficulty: 1 - Very easy, for newbies
Platform: Multiplatform
Language: Java

Published: 14. Jul, 2009
Downloads: 1006

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by obnoxious, published 18. jul, 2009; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

WarRock 14. Jul 2009	hehe just need Java Decompiler :p
TripleTordo 14. Jul 2009	hey, self-keygen made in less than 1 minute :)
WarRock 14. Jul 2009	this keygenme is open-source hahhaha :D
CesNew 14. Jul 2009	mmm i haven't read about DES algorithm... i'll try
TripleTordo 14. Jul 2009	Yea xD, funny. only change message with the correct serial, but this is not the way :P
CesNew 15. Jul 2009	lol ... like i said, 1st we must know how DES works xD
skNiNe9 Author 15. Jul 2009	:D yea it's very easy, but there's no solution atm ^^
obnoxious 16. Jul 2009	I assume it implements Cipher.init("DES/ECB/NoPadding"); you are not using any padding right? tell me if this works. Name: F48A6B0BA44C72E7 (in hex) Serial: 1 2 3 4 5 6 7 8
obnoxious 16. Jul 2009	Sorry Serial: 1 2 3 4 5 1 2 3
KernelJ 17. Jul 2009	I tried writing a tutorial for this using jdb, and no matter how hard I tried I couldn't get it to do anything useful. It maybe works to a limited extent if the source code is available and the class was compiled with the -g switch. If anyone knows a way of using it which actually tells you anything please inform me...
skNiNe9 Author 17. Jul 2009	what works to a limited extend? I wrote a keygen for my crackme myself and it works wonderful ^^
KernelJ 17. Jul 2009	I was referring to the JDB tool being a useless piece of crap. If I just wanted to solve the keygenme I would've just used JAD and adapted the output into usable keygen code.

SlashZero's Keyfileme #1

Download keyfileme.zip, 201 kb (password: crackmes.de)
Browse contents of keyfileme.zip

a little RSA-15 keyfile me

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 17. Jan, 2003
Downloads: 1451

Rating

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Solutions

Solution by figugegl, published 27. jan, 2003; download (10 kb), password: crackmes.de or browse.

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slift's The Outside Area

Download TheOutsideArea.zip, 316 kb (password: crackmes.de)
Browse contents of TheOutsideArea.zip

The Outside Area

MODERATOR NOTE:
this is a floppy disk image - I have been able to run it in bochs emulator using these lines in bochsrc:

...
floppya: image=TheOutsideArea, status=inserted
boot: floppy
...

Difficulty: 7 - Very hard
Platform: Unspecified/other
Language: C/C++

Published: 23. Mar, 2010
Downloads: 321

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by egogg, published 16. dec, 2010; download (232 kb), password: crackmes.de or browse.

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Send a message to SmilingWolf »

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Discussion and comments

egogg 15. Dec 2010	"Excellent!" The secret is: i0X48n7H>j39-L$Z XXTEA + some self defined Algorithms. I will post the keygen and tutorial later.
cyclops Moderator 16. Dec 2010	Just one word to utter: Exceptional!

SmilingWolf's B0rken ElGamal KeygenMe

Download B0rken.ElGamal.KeygenMe-SW.zip, 10 kb (password: crackmes.de)
Browse contents of B0rken.ElGamal.KeygenMe-SW.zip

What you need to know is inside the ReadMe.

Have fun!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 12. Jul, 2016
Downloads: 69

Rating

No votes yet.

Solutions

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Discussion and comments

SMNsoft's SMNsoft's crackme

Download SMN.zip, 20 kb (password: crackmes.de)
Browse contents of SMN.zip

SMNsoft Crackme 1

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: (Visual) Basic

Published: 22. Mar, 2009
Downloads: 175

Rating

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Discussion and comments

d(O_o)b
10. May 2009

Why does this crackme closes itself, when I click the help button? Is this a bug or part of the protection?

Anyway, the serial format is
"AA:BB - CC.DD.EEEE - FFFF/GG/HH"

Serial fishing is not a problem.
I know A,B,C,D,E - thats not a big deal! ;-)
But inorder to write a keygen I still need to know
how F,G and H are calculated.

Some hints might be useful:
- Is H a fixed value?
- Is the 'hardware code' needed for calculating F,G or H or all three?

szmszm
02. Oct 2010

what tools you use to diasm this file?

SMNsoft's SMNsoft's Crackme#2

Download FINAL.zip, 41 kb (password: crackmes.de)
Browse contents of FINAL.zip

1) No pacthing.
2) Find a valid serial.
3) Kill nag
3) Write a tut.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 10. Apr, 2009
Downloads: 195

Rating

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Discussion and comments

ChupaChu 11. Apr 2009	it leaves junk in system32 folder.. so i dont like it..
T.0.R.N.A.D.0. 11. Apr 2009	ChupaChu: +1. Yes CrackMe #3 and #2 both leave junk in system32. I hate this. This time (#2) the file are named *.sys !?! They are encrypted too.
Xspider 12. Apr 2009	en_Log.sys & test.sys
SMNsoft Author 13. Apr 2009	OK but FIND A VALID SERIAL thanks
als pom 01. Nov 2009	It seems that when I execute the program I can't control my mouse

SMNsoft's SMNsoft's Crackme#3

Download Keygen_me.zip, 334 kb (password: crackmes.de)
Browse contents of Keygen_me.zip

1) No pacthing.
2) ** Make a Keygen. (It's important)
3) Write a tut.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 23. Mar, 2009
Downloads: 1182

Rating

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Solutions

Solution by plone, published 06. apr, 2009; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

SMNsoft Author 31. Mar 2009	Is it too hard?!
WarRock 03. Apr 2009	(Visual) Basic :-!

SMNsoft's SMNsoft's KeygenMe #4

Download KeygenMe#4.zip, 46 kb (password: crackmes.de)
Browse contents of KeygenMe#4.zip

1) No patch
2) Make a good tut
3) **Make a keygen
4) **Kill Nag

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 23. Apr, 2009
Downloads: 187

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Solutions

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Discussion and comments

SMNsoft Author 25. Apr 2009	it is too easy. it doesn't make any files in your disk.
The So;X 05. May 2009	<.> NICE
geeko 06. May 2009	for What a keygen?!? I dont see any place to enter a key!
geeko 06. May 2009	runtime error is part of protection?
SMNsoft Author 06. May 2009	first click on ok. and then type your username and passwsord
SMNsoft Author 06. May 2009	Do not change the name name = "SMNsoft_KeygenMe.exe" filesize protection security protection and...
geeko 07. May 2009	when i click ok i got a runtime error
SMNsoft Author 07. May 2009	i don't know this crack me was tested
geeko 08. May 2009	if i need to have VB installed, then you must submit all the necesary libraries
SMNsoft Author 08. May 2009	No It need only msvbm60.dll Only find it in your System32 Folder
DigitalAcid 08. May 2009	Just search the files on google or something and you'll find a site where you can download them all. Then paste them in the folder wich contains the crackme or system32 if you are going to solve future VB crackmes.
SMNsoft Author 09. May 2009	Where is solutions?!! It's very easy!! ;) Try
d(O_o)b 10. May 2009	First! :-) but I suck at writing tutorials, so here is my pass only: Name: d(O_o)b Pass: 611032
SMNsoft Author 10. May 2009	OK. it's true but KILL NAG **SERIAL FISHING?
d(O_o)b 10. May 2009	How to kill NAG without breaking with rule "1) No patch" ? Serial fishing? Yeah, but I also keygenned it. :-) I submitted the VB Source Code for the keygen: -> "Your solution to this crackme is being reviewed by moderators." Now let's see if the mods like it as it contains no tutorial, only the VB source code for serial generation.
SMNsoft Author 12. May 2009	Just in KEYGENING --> "1) No patch"
d(O_o)b 12. May 2009	Ooops, then I have missed sth. So, that means that "d(O_o)b"/"611032" is NOT a real name/pass combo, as the NAG screen remains. Hmm...
SMNsoft Author 13. May 2009	ha...ha...ha...
d(O_o)b 17. May 2009	So once a valid name/pass combination is entered, the NAG screen never appears again or it only does not appear on next run?
SMNsoft Author 19. May 2009	every time nag screen show. YOU CAN'T REMOVE NAG SCREEN ;-)

SMNsoft's SMNsoft KeygenMe #4

Download SMNsoft_KeygenMe#4.zip, 101 kb (password: crackmes.de)
Browse contents of SMNsoft_KeygenMe#4.zip

SMNsoft KeygenMe#4

Rules:

- No Patch
- write a keygen
- write a tut

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 23. Jun, 2009
Downloads: 263

Rating

Votes: 3
Crackme is boring.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to smoke »

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Discussion and comments

KernelJ 23. Jun 2009	Unexpected error
SMNsoft Author 24. Jun 2009	NO It was checked.
SpiderZ 28. Jun 2009	Example: User: SpiderZ Serial: Z09A57E101565I501963S38351270112P464100D672114R CheckSum1: 1DEAB957 CheckSum2: A110997B5B
The So;X 29. Jun 2009	Why Why Why u r crackmes r always so difficult.... :(
SMNsoft Author 29. Jun 2009	oh sorry my next crackme will be easy
SMNsoft Author 29. Jun 2009	SpiderZ : Good job man now make a keygen and tut
The So;X 30. Jun 2009	i have serial too... but algo is too difficult that i cant figure out k-gen
SMNsoft Author 02. Jul 2009	HELLO YOU ARE CRACKER
The So;X 02. Jul 2009	u r asking to me budy....
deskyet 06. Jul 2009	is a decompiler allowed, its not in the rules but i found the string in the executeable?
SMNsoft Author 08. Jul 2009	every things is allowed. but only no patch and write a keygen ;)

smoke's keygenme1

Download kgm_smoke.zip, 180 kb (password: crackmes.de)
Browse contents of kgm_smoke.zip

name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. May, 2001
Downloads: 1632

Rating

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Solutions

Solution by tscube, published 26. may, 2001; download (14 kb), password: crackmes.de or browse.

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Solution by niftybitz, published 26. may, 2001; download (4 kb), password: crackmes.de or browse.

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Solution by nordic, published 26. may, 2001; download (13 kb), password: crackmes.de or browse.

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Send a message to sneakcharm »

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Discussion and comments

sneakcharm Author 20. Sep 2005	Can no one crack this? lol

sneakcharm's Password Protection

Download prjcrackme.zip, 4 kb (password: crackmes.de)
Browse contents of prjcrackme.zip

This password protection is complicated.

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 08. Dec, 2003
Downloads: 1452

Rating

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Solutions

Send a message to snuker »

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Solutions

Solution by acruel, published 23. sep, 2015; download (540 b), password: crackmes.de or browse.

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Solution by timcess, published 15. aug, 2013; download (4 kb), password: crackmes.de or browse.

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Solution by Qnix, published 15. aug, 2013; download (2 kb), password: crackmes.de or browse.

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Send a message to so61pi »

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Discussion and comments

acruel 31. Aug 2015	Is the following instruction intended for alignment? 0x080486ca <+238>: shr eax,0xc I thought the instruction should be modified as follows: and eax,0xFFFFF000 or equivalently shr eax,0xc shl eax,0xc

so61pi's KeygenMe#1

Download KeygenMe.zip, 2 kb (password: crackmes.de)
Browse contents of KeygenMe.zip

This crackme use RSA algorithm.

MODERATOR NOTE: bonus challenge: produce only serials that are normal ascii printable characters

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 27. Sep, 2009
Downloads: 611

Rating

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Solutions

Solution by bLueDarK, published 05. oct, 2009; download (334 kb), password: crackmes.de or browse.

bLueDarK has rated this crackme as awesome.

Send a message to sobec »

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Discussion and comments

dr.dmoon 29. Sep 2009	hard for 2 lvl, i think solved only are brute
7histle 29. Sep 2009	:] brute force is not need.
winsock 30. Sep 2009	U win, I SURRENDER!. good crackme, but is so hard! If any have solution.. i need XD.
bLueDarK 02. Oct 2009	i sent a keygen for this keygenme.. i used table system.. you can try to use different system.. good luck
bLueDarK 02. Oct 2009	name:b1u3D4rK serial:0002hU
bLueDarK 04. Oct 2009	keygen+keygenme+code+tuto h**p://www.trgct.com/bluedark/tutorials/keygenmeso61pi.rar
Lone.Wolf 05. Oct 2009	@7histle lol, so tell me how do you decode an algortihm, that uses MOD? lets say x mod 30 = 5 whats x? x { 30*n+5 } for x you will need the n component, which is impossible to reconstruct i ask you this because there is a part where mod is used: look at 0x4011A5 there is only one way - brute forcing the serial :P best regards ;)
andrewl.us Moderator 05. Oct 2009	@Lone.Wolf: you are right that the linear equation you wrote has infinite solutions (the congruence class is infinite)... but address 4011A5 is continually subtracting (calculating the modulus) instead after EXPONENTIATION by 0x9D - and mod carefully chosen numbers, it is invertible: read http://en.wikipedia.org/wiki/RSA
Lone.Wolf 05. Oct 2009	"and mod carefully chosen numbers, it is invertible" thats magic ^^ i will familarize myself with rsa thanks for the information best regards
bLueDarK 05. Oct 2009	i read that document before wrote a tuto.. but the 0x9D made it different... this is the reason why i didn't use the rsa decode system.. but i developed my own calculating system.. you know the name's total result.. and you can use it to calculating serial... at first i wrote all printable char and coded with serial algorithm.. for exmp. 1==>31h ----after serial algo---->24h u==>75h ----after serial algo---->68h .. i created a table about it.. and than i started to select char for that result.. if name's result is B0h we can generate serial many diffirent kinds.. similar this: 1u1,11u,u11; or another chars... 11u-->(24h+24h+68h)=B0h but we had a problem... we didn't have 01h's provision in table... therefore i allocated table odd and even.. if result is even i use even table, if result is odd i use odd table.. after the this change the result has never been 01h (: at the and you don't use brote-force system cause it isn't necessary ((:
so61pi Author 01. Feb 2010	This crackme has a bug. Name="³³³³³³³³" -> Serial=Nothing

sobec's swamp

Download swamp.zip, 2 kb (password: crackmes.de)
Browse contents of swamp.zip

hint: the strings are xored

Difficulty: 3 - Getting harder
Platform: Windows
Language: Unspecified/other

Published: 29. Oct, 2005
Downloads: 559

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by Fake51, published 07. mar, 2006; download (6 kb), password: crackmes.de or browse.

Fake51 has rated this crackme as quite nice.

Send a message to solar designer »

View profile of solar designer »

Discussion and comments

code_inside 29. Oct 2005	Is it me or? What is the purpose of this CrackMe? :)
jB_ 29. Oct 2005	Same as code_inside lol
ultrasound 10. Nov 2005	sobec, is there any indication of correct name/serial that I have missed.. AFAIK I have traced the two algos which makes new value's from serial first, then the name, but there is no conditional jumps made or any comparison of the 2 values.. As above, what is the aim of the crackme? Moderators, any extra info given with CM when submitted?
elfz 10. Nov 2005	yes, sobec mentions a way to distinguish random noise from the string.
ultrasound 13. Nov 2005	are we supposed to keygen it? what is supposed to happen when we get a valid key?
Fake51 06. Mar 2006	Don't think this is bad, it displays it's ideas ok. However, also don't think it's level 2. 3 or 4 perhaps. Fake

solar designer's solar

Download solar.zip, 5 kb (password: crackmes.de)
Browse contents of solar.zip

wow ! here the protection is emulating a...

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jul, 2002
Downloads: 1382

Rating

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Solutions

Solution by kRio, published 29. mar, 2004; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

SoN's CrackMe Challenge 1

Download SoN_CrackChallenge1.zip, 38 kb (password: crackmes.de)
Browse contents of SoN_CrackChallenge1.zip

This is our first published CrackMe. Hope you enjoy it. Here are some features it has:
P-Code.
Packed.
Key File.
Nag Screen.
Registration.
The Shaitan Cipher Bonus (Optional).

"

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 12. May, 2005
Downloads: 775

Rating

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(we have only 1).

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Solutions

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Discussion and comments

SoN's SoN Console CrackMe 1 - Revised

Download SoN_Console_CrackMe_1.zip, 56 kb (password: crackmes.de)
Browse contents of SoN_Console_CrackMe_1.zip

This is a console crackme that was coded in VB .NET 2005 Beta 1.
It is multi-threaded and .NET protected just so you can't use a
reflector program to view the exact source code. Well, unless
You can find a way around that. When you thin you have found the
correct serial, look very carefully because you're just getting
started with the whole thing! All you need to do is keygen it
when you figure out how the key is being generated. Be patient!
Good luck and have fun with this one. Have fun with all of them!""

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 30. May, 2005
Downloads: 740

Rating

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Discussion and comments

TaGaDaPaF! 29. May 2005	I can't launch it, it says: "A fatal error occured. However, mscorees.dll could no be loaded to display the appropriate error message. Please reinstall the .NET Framework."
SoN Author 29. May 2005	http://www.microsoft.com/download/SoN_Console_CrackMe_1.zips/details.aspx?FamilyID=7ABD8C8F-287E-4C7E-9A4A-A4ECFF40FC8E&displaylang=en .NET Framework 2.0 Beta. Sorry I probably should have put that in the readme.
Zero Moderator 30. May 2005	The new version is accepted by me. Hope it works now...
TaGaDaPaF! 30. May 2005	When I try a serial, The program crash with a "System.MissingMethodException". Does it crashes on purpose or i fucked the installation or whatever... ?
SoN Author 31. May 2005	It's not on purpose. I don't think you have the framework installed right. I've tested this on XP Pro, XP Home, and 2000 Server. So if you aren't using one of those let me know.
TaGaDaPaF! 31. May 2005	I'm running under win2k3. but anyway, it's so obfuscated, i won't be able to reverse it
SoN Author 31. May 2005	There are ways other than viewing the source you know. :)

Discussion and comments

Rammer 07. Jul 2005	PEview Version 0.8.0.0 errors while loading the executable. Next tried PE Explorer v1.97 (30 day evaluation version from www.heaventools.com): 07.07.2005 00:41:58 : Error: Bad MS-DOS Header! Processing cancelled. 07.07.2005 00:41:58 : Internal Error! (Step: Examining File Headers) 07.07.2005 00:41:58 : Done. No luck. Viewing the executable with WinHex 12.25 SR-3 (a hex editor), the MS-DOS Stub Program does indeed look bad. It appears to be packed using UpackByDwing: MZKERNEL32.DLL..LoadLibraryA.... GetProcAddress..UpackByDwing@... PE PEiD v0.93 has an unpacker, but it crashes on me while trying to use "snaker's Generic Unpacker v0.1" plugin. Didn't look like other VB executables in the hex editor, yet I tried VBReFormer V3.7 and as expected was told it was not a VB4-5-6 executable or the progam uses anti-decompilation protection. Capturing packets while trying to register with random names and codes, show a response from 24.140.81.xx (cable-81-xx.sssnet.com) HTTP/1.1 200 OK..Server: Microsoft-IIS/5.0..Date: Thu, 07 Jul 2005 05:46:43 GMT..X-Powered-By: ASP.NET..Content-Length: 26..Content-Type: text/html There's a Set-Cookie and a humorous string. Too sleepy to progress. Gave up for now, but I wonder if the cookie could be spoofed?
kao 07. Jul 2005	Unpacking is trivial... I know what kind of reply a webserver should return. I can make my proxy to fake that reply. Does that count as a solution? ;)
SoN Author 07. Jul 2005	Yes, it does count. Start coding! :)
SoN Author 08. Jul 2005	I just re-read that. To be clear, it counts if you can create a program that will duplicate it for other people and explain how it works.
EsKiMo 31. Aug 2005	I think I found something! Submitted a solution.

SoN's SoN CrackMe Bad Wolf

Download Bad_Wolf.zip, 10 kb (password: crackmes.de)
Browse contents of Bad_Wolf.zip

This isn't testing your ability to reverse an algorithm as much as it's testing your ability to understand the rest of a program. Your goal in this crackme is to write a new DLL that will replace the included DLL. For those of you who write a lot of DLLs already, this shouldn't be very hard but hopefully it will help a few people to learn what's going on... (More inside)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 26. Apr, 2006
Downloads: 537

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Discussion and comments

astigmata 26. Apr 2006	Dictionary attack with mistype and mutations has found the password. Done: tested 6,204,208 passwords in 03sec Attack speed (passwords per second): 1,617,785 :)
astigmata 26. Apr 2006	open son bad wolf.dll with cff explorer to get NumberOfFunctions and Names.
astigmata 26. Apr 2006	It's a good crackme It doesn't work yet because I don't know the handle of the Label, but have a look here http://thebigjo.free.fr/temp/SoN Bad Wolf.dll
SoN Author 26. Apr 2006	You don't need the handle of the label at all. The DLL doesn't touch it.
astigmata 26. Apr 2006	Is it allowed to make a self-patch from the dll call ? when you click register, it patches 2 bytes 0040222E . 52 65 67 69 73 74>ASCII "Registered to: U" 0040223E . 4E 52 45 47 49 53>ASCII "NREGISTERED",0
SoN Author 26. Apr 2006	No, it has to work like it's supposed to. :)
godhack 27. Apr 2006	yes ,download!!!crack it!
SoN Author 27. Apr 2006	Are you saying that people should crack it or that you cracked it?
godhack 27. Apr 2006	of course that people crack it ,hehe
SoN Author 27. Apr 2006	They should at least try, yes! We are currently working on a few more. All kinds of fun things.

Discussion and comments

D3z+ 20. Apr 2006	That's cool! I just solved it... :)
SoN Author 20. Apr 2006	Really? You have a working key?
Shism 20. Apr 2006	By solved it .. I mean he patched it. This wouldn't work as a commercial protection....
SoN Author 20. Apr 2006	It's not set up to protect against patching, that's why it says "No patching" in the readme. ;)
Shism 20. Apr 2006	A possible solution to this is a proxy...
D3z+ 20. Apr 2006	I don't have patched the original code.
Shism 21. Apr 2006	So what did you do?
indomit 21. Apr 2006	It's not new idea... And it has one grave disadvantage: The program cannot work without internet connection...
D3z+ 21. Apr 2006	I have submitted the solution with the app. I just simulated the connection of the server on my machine. :)))
SoN Author 21. Apr 2006	New to us. But it's just a crackme that you downloaded from the internet so I didn't figure an internet connection would be too much to ask. :) Just enjoy it!
Shism 21. Apr 2006	Hey other than that its a cool crackme...
D3z+ 21. Apr 2006	That's true... really original idea!
SoN Author 21. Apr 2006	Thanks. Basically we are starting to move on from being able to understand a little bit of ASm to being able to write it. It's all about learning.
SoN Author 21. Apr 2006	I like the way you solved that, D3z+. Good work. I'm glad that you enjoyed it. Sorry it wasn't more of a challenge though. I think we'll have to work harder on that next time.

SoN's SoN CrackMe Tube Alloys

Download SoN_CrackMe_Tube_Alloys.zip, 9 kb (password: crackmes.de)
Browse contents of SoN_CrackMe_Tube_Alloys.zip

Objective: Write a keygen for this crackme.

Rules: No patching the exe and you have to write a keygen and submit it to crackmes.de.

This is another crackme from the creative spurt of SoN. We have decided that we only tend to write
crackmes that we enjoy and this is no exception. It's fun so we hope that you have a good time while
cracking it. It was tested on XP SP2 and 2000 server but it should work on all Windows systems. If
you have problems with it then send us a message on crackmes.de and let us know your system specs.
Good luck and have fun. Learn something while you're at it.

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 05. May, 2006
Downloads: 452

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SoN's SoN - Packed CrackMe 1

Download SoN_-_Packed_CrackMe1.zip, 7 kb (password: crackmes.de)
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This is a basic username / serial registration form. Create a keygen for it. Good luck and have fun."

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 22. May, 2005
Downloads: 792

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Solutions

Solution by EsKiMo, published 03. feb, 2006; download (20 kb), password: crackmes.de or browse.

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Discussion and comments

juanma 01. Jun 2005	it's possible to brute force the md5 hash with a PII 300 Mhz ? i think i have the good hash to crack !
SoN Author 02. Jun 2005	If there is an md5 hash that you have found, it can be brute forced with a PII 300Mhz, yes.

sonkite's crackme

Download son_crackme.zip, 10 kb (password: crackmes.de)
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name/serial (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 09. Feb, 2001
Downloads: 1801

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Solutions

Solution by webmasta, published 09. feb, 2001; download (43 kb), password: crackmes.de or browse.

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sonkite's crackme2

Download son_crkme2.zip, 171 kb (password: crackmes.de)
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name/serial (delphi)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Borland Delphi

Published: 05. Jul, 2001
Downloads: 2211

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Solutions

Solution by muaddib, published 27. dec, 2002; download (17 kb), password: crackmes.de or browse.

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sonkite's Crackme #7

Download sk_cm7.zip, 4 kb (password: crackmes.de)
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Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 13. Apr, 2003
Downloads: 1473

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Solutions

Solution by TheFoX, published 17. apr, 2003; download (15 kb), password: crackmes.de or browse.

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sonkite's Crackme 8

Download sk_cm8.zip, 1 kb (password: crackmes.de)
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Keyfile

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 11. Oct, 2003
Downloads: 2011

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Solutions

Solution by Roma, published 19. oct, 2003; download (12 kb), password: crackmes.de or browse.

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Solution by elfz, published 16. oct, 2003; download (57 kb), password: crackmes.de or browse.

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SoTaNeZ's Crackme 2 de esn-min

Download 5min.zip, 2 kb (password: crackmes.de)
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curious algorithm. Name/Serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 03. May, 2003
Downloads: 1112

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Solutions

Solution by Roma, published 21. sep, 2003; download (14 kb), password: crackmes.de or browse.

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Souhail's Climb

Download Climb.zip, 11 kb (password: crackmes.de)
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Try to find the flag inside the crackme. You've got all the resources you need to complete this challenge within the binary.

Good Luck...

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 04. Apr, 2015
Downloads: 330

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by baderj, published 23. apr, 2015; download (131 kb), password: crackmes.de or browse.

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Solution by halsten, published 22. apr, 2015; download (5 kb), password: crackmes.de or browse.

halsten has rated this crackme as boring crap.

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Discussion and comments

Souhail Author 12. Apr 2015	Hint : The flag is an english sentence.
halsten 15. Apr 2015	My assumptions was that nobody wrote anything as it wasn't fitting for a challenge at in the first place. No hints are really required.
baderj 19. Apr 2015	That was really fund. Very nice idea.

Sound's Crack Me.rar

Download Crack_Me.zip, 683 kb (password: crackmes.de)
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arbitrary input Key

for Success

AutoIt3

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 18. May, 2013
Downloads: 1201

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by seVeb, published 18. jun, 2013; download (738 kb), password: crackmes.de or browse.

seVeb has rated this crackme as quite nice.

Solution by deurus, published 28. may, 2013; download (1380 kb), password: crackmes.de or browse.

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Send a message to spacekeks »

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Discussion and comments

smallhorse 19. May 2013	OH My GOD！Teacher，That's So hard!!
Xartrick 19. May 2013	FAQ: Q: "I'm new to writing crackmes, what should I write?" A: "First, try reversing some crackmes in the site to see what they are like. Put some effort into writing your crackme. Do not use strcmp, f(name)==key or something else that took you 5 minutes to write and upload. This does not mean the crackme has to be hard, but think of something interesting and original that separates yours from the rest."
zairon Moderator 19. May 2013	es, the crackme is easy but there's something more than a single compare.
desert2500 20. May 2013	After try different method,I have to admit that how important it is to solve a prome in a correct direction.May I submit a memory patch as a solution?This is my first time to try to give a tutoria although it is so simple!:)
hadrian 24. May 2013	yeah i know something interest here...Thanks. i much learn about basic RE here
gravemindx 26. May 2013	probelm is, it will first give wront key! error, a mistake in code i think.
sooqua 02. Jun 2013	HARD, BLEA!!!! UBERHARD, SUKA
Ra1ningSn0w 03. Jun 2013	Just use a decompiler Work: 2 minutes...
ideku_nih 13. Jun 2013	It takes long.. long.. and long.. times to encript packer, let's discuss about dinner, how about that.. sound good?

spacekeks's crackme #1

Download sk_cm1.zip, 169 kb (password: crackmes.de)
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multi-part serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 25. Oct, 2000
Downloads: 1808

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Solutions

Solution by nh, published 25. oct, 2000; download (1 kb), password: crackmes.de or browse.

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SparK's Impossible XOR

Download Impossible_XOR.zip, 239 kb (password: crackmes.de)
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Hi All!. This is the first part of my three part experiment. It consist, in a code routine that you have to decrypt with a "magical" key in order, to activate this crackme.

Read instructions carefully. Debugging, you will see when you will be registered.

It's simple, then a second part will appear. :)

Salut!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 08. Aug, 2006
Downloads: 496

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Discussion and comments

zhengjuyu 21. Aug 2006	I think I did it. But I'm not very sure. This crackme uses xor's result as machine code and run it. So I asm "mov ebx, 0x00454870; jmp ebx" here 0x00454870 is the proc which display "about dialog". The machine code for the two instructions is "BB70484500FFE3", and then xor with the first 14 bytes of the 96 bytes key "585FE3A2661063", result is E32FABE766EF80. So the final key is a 96bytes-len key, begin with "E32FABE766EF80".
SparK Author 21. Aug 2006	Hi!, Thanks for try to crack this Crackme. Uhm... your solution is not correct... the final code don't have to point to the about dialog. You have to create a license key, to finally will decrypt in a "good boy" code... It's difficult coz u don't know the code target... but this is the idea... :) "without references... we cannot crack..." Keep trying... Salut!
jE! 03. Sep 2006	hi, author! little info, please. 1. does "Actiovation" means enabling TMemo control (or other)? 2. must "final message" be in keyfile? 2a. & it must be text in Memo? 3. Can i produce my variant of key or only your variant is expected?
SparK Author 03. Sep 2006	hi jE!, thanks for your interest in my crackme. 1. you don't have to activate nothing.... 2. keyfile has to be the "magic key" to decrypt da crypted code... 2a. u don't have to think in this memo... u have to find a correct key... this memo is used to load the magical key in da keyfile... 3. you have to find the magical key, that i use to decrypt da correct code. if u can find the correct key in order to decrypt the original designed code, you are a gurÃº. :) thanks. salut dude!
jE! 03. Sep 2006	ok, thank for replay! last question(i'm lazy:) encrypted code is those HEX-bytes?
SparK Author 04. Sep 2006	yeah, encrypted code is those HEX-strange bytes.... no hash, nothing. only a lazy xor. :) see ya m8.
carioli 30. Oct 2006	It's unpossible, because Your key is too long: too many possibilities without any additional data or conditions.
SparK Author 09. Nov 2006	I could make a tiny key version if you want... so you could try it... wait me some says. thanks... :) cya

spenser21's CrackMe3-N By SpEnSeR

Download CrackMe3-N_By_SpEnSeE.zip, 10 kb (password: crackmes.de)
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Timer/Nag CrackMe
By SpEnSeR

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 24. Aug, 2004
Downloads: 1101

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Solutions

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Solutions

Solution by fjlj, published 12. nov, 2009; download (2908 kb), password: crackmes.de or browse.

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Discussion and comments

synak 08. Nov 2009	SmartCheck has no problems providing a proper serial :) synak / 2F11-F7C1-500A
fjlj 09. Nov 2009	providing a serial is easy but to make the keygen thats another story i will be uploading a tut soon :) i will say this was a fun one :)
fjlj 12. Nov 2009	ok i submitted a keygen version and a video tut :) hope to see it soon
T-rad 19. Apr 2010	made a real keygen, but i suck at tutorials so i cant submit. was kinda difficult to trace. I felt totally stupid when i got it. anybody wants the src - pm me and i'll email it - it's in c#.net T-rad / 1112-FB83-490A
Coderess 16. May 2010	Good one, easy to find key but hard to find algo for keygen, @fjlj nice work
Arttomov 06. Aug, 19:38	Arttomov- 4F16-EFEC-520D

SPOKE3FFF's CrackMe#1

Download CRACKME#1_by_SPOKE3FFF.zip, 651 kb (password: crackmes.de)
Browse contents of CRACKME#1_by_SPOKE3FFF.zip

Hi all, :)
Obfuscation
Antidebug

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 17. Aug, 2008
Downloads: 790

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by JoKa, published 07. sep, 2008; download (4 kb), password: crackmes.de or browse.

JoKa has rated this crackme as nothing special.

Solution by ultrasound, published 24. aug, 2008; download (22 kb), password: crackmes.de or browse.

ultrasound has rated this crackme as quite nice.

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Discussion and comments

Ramirez 17. Aug 2008	hmm, Avast alert : http://crackmes.de/users/spoke3fff/crackme1/download/CRACKME#1_by_SPOKE3FFF.zip\CRACKME#1 by SPOKE3FFF.EXE contains virus Win32:Pakes-AOA [Trj]
SPOKE3FFF Author 17. Aug 2008	Hi Ramirez, I don’t use Avast ,I use antivirus Panda. No virus ,no trojan on it . Best regards
chodon 17. Aug 2008	Yes their has no virus.I do not like avast because it detects badly. ram... download.Really their ve no prob:)
ultrasound 24. Aug 2008	nice cm.. keygen+tut submitted :)
SPOKE3FFF Author 24. Aug 2008	Hi ultrasound, :) Thanks To give of the interest to this cm, very good tutorial and beautiful design for keygen. Good work. bye :)
SPOKE3FFF Author 16. Nov 2008	Hi JoKa,:) Thank you for your nice tut and keygen bye,
ben2938 09. Nov 2010	there is virus in the file according to Symantec!!

SPOKE3FFF's CrackMe#2

Download CRACKME#2.zip, 396 kb (password: crackmes.de)
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Obfuscation
Antidebug

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 17. Aug, 2008
Downloads: 666

Rating

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Solutions

Solution by Whivel, published 23. aug, 2008; download (807 kb), password: crackmes.de or browse.

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Discussion and comments

kao 17. Aug 2008	There's a small bug in a crackme. You can check serial number only one time and then you need to restart crackme. On 2nd, 3rd, etc attempt no serial will be valid.
SPOKE3FFF Author 18. Aug 2008	Hi kao, Yes it’s true, it’s a small bug which I did not modify. Because i begin in programming ASM. Sorry for it
SPOKE3FFF Author 23. Aug 2008	Thanks to Whivel to solve it,Very nice tutorial. An d thanks to solve the little bug.

SPOKE3FFF's CrackMe#3

Download CrackMe#3.zip, 13 kb (password: crackmes.de)
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Hi all, :)
Find the serial " Light Registered » or " Full registered " :
Good fishing. ;)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 23. Dec, 2008
Downloads: 1518

Rating

Votes: 5
Crackme is quite bad.

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Solutions

Solution by deurus, published 31. aug, 2009; download (28 kb), password: crackmes.de or browse.

deurus has rated this crackme as boring.

Solution by dMNt, published 31. aug, 2009; download (951 b), password: crackmes.de or browse.

dMNt has rated this crackme as boring.

The submission of solutions is closed.

Discussion and comments

shellwolf 24. Dec 2008	HEXA for light 128 regcode is valid for full..... such as:BYV,4fW....
alicemcline 27. Dec 2008	moderators.. is this one virus infected?? my BitDefender gave me a Virus Alert.. Virus Name: Trojan.Dropper.Delf.BBJ
xylitol 27. Dec 2008	false positive from your AV
ReWrit 09. Aug 2009	i found: Win32:Jevafus[Trj] using avast anti virus...
StealTHeBYtE 25. Aug 2009	Fu**ing idiot has attached a trojan. Should be banned!
kao 25. Aug 2009	@StealTHeBYtE: don't make a fool of yourself. Virustotal analysis (9/30) is wrong - there is no virus in that exe.
Xspider 28. Aug 2009	:lol: that's just a wrong analysis from AVs ;)
dMNt 28. Aug 2009	ZAV+any 2 char/digit = Full Registered
deurus 30. Aug 2009	Good job SPOKE3FFF, I send the keygen
SPOKE3FFF Author 06. Nov 2009	Hi deurus, :) thx for your solution and keygen very good job ;)
SPOKE3FFF Author 06. Nov 2009	hi dMNt,:) Thx for your soluce,;) good job ;)
deurus 22. Nov 2013	Videotutorial en español del crackme: https://www.youtube.com/watch?v=upZ-7PISdA4

sraboy's CrackmeJenny

Download crackme.tgz, 116 kb

# Crackme Jenny

A not-terribly-complicated crackme with a couple interesting twists. There are three versions available in the archive:

1. Easy mode (developer): unstripped binary, includes a bunch of printf statements providing debug output
2. Medium mode (debug): unstripped binary, no debug output
3. Hard mode (release): stripped, no help at all

Even with developer mode, don't get too comfortable with the debug output.

# Scenario

You're a consultant being hired to reverse engineer this key generator. Your client has the activation key (13284645-2427364-104376652) but lost the username and password used to generate that key in a recent datacenter catastrophe.

The original developer has gone out of business and the current owner of the online portal claims to have no access to the prior company's records and will not help. The username and password is required to access the online portal, which contains years of business records for your client.

Your client doesn't like the idea of cracking the original software, for legal reasons, so it is your job to discover the username and password that generated this key.

No one knows how this software works. It was used years ago to generate the key but that was all done by sub-contractors who are long gone.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 12. Jul, 2016
Downloads: 174

Rating

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Solution by acruel, published 25. aug, 2016; download (1 kb), password: crackmes.de or browse.

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acruel 23. Jul, 18:45	I enjoyed it. Thanks! ;)

st0per's Ifucan

Download keygenmoi.st0per.zip, 75 kb (password: crackmes.de)
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Name/Serial Crackme with 3 Levels! Keygen Possible

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 16. Jun, 2004
Downloads: 1196

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Solutions

Solution by Plasmator, published 26. aug, 2004; download (79 kb), password: crackmes.de or browse.

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starlight's continue winkengenme

Download kengenMe2.zip, 32 kb (password: crackmes.de)
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similar with my first one, I think this one is a little harder than that one.the goal is simple. Write a keygen. Or just understand the algoritm of generation serial.....
Have a nice day :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 29. Jul, 2008
Downloads: 354

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Solutions

Solution by ~misunderstood~, published 05. aug, 2008; download (8 kb), password: crackmes.de or browse.

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~misunderstood~ 30. Jul 2008	starlight - you really keep me busy. I almost got it, nice one again! will send in my solution this evening :)
starlight Author 30. Jul 2008	yeh, thank you. But you mean you have already solved this one? This time you are so fast.... en..I think it may becuse it is similar with my last one.. And I also hope for your next one.
~misunderstood~ 30. Jul 2008	I passed my exams and have holidays right now :)... today I spend my time whole time reversing, and so I´m gonna finish this one tonight, I guess...right now I got a bit stuck, for it´s trickier than your first one, but i think that all in all I understood the algo. I´m currently working on my next keygenme, too ;)
starlight Author 06. Aug 2008	ok, it is cracked very nice. Good job misunderstood :)

starlight's easy windows crackme

Download KeygenMe.zip, 36 kb (password: crackmes.de)
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Hello everyone,
It's my first crackme.it's a CONSOLE Procedure.it may be simple.I use C++ and a little asm to made it.Please write a keygen for it,
Or just understand the algoritm of generation serial.
May you have more fun with it.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 14. Jul, 2008
Downloads: 521

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Solutions

Solution by ~misunderstood~, published 25. jul, 2008; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

~misunderstood~ 19. Jul 2008	Maybe this one is a little too difficult for level 1... I´m gonna write a solution to help people who might have problems solving this (would be my first solution to publish here) :). @starlight I liked it, nice for in between, thx.
starlight Author 21. Jul 2008	I'm sorry, because this is my first CRACKME, the difficulty is not so sure. @~misunderstood~ thx for your solution.
~misunderstood~ 21. Jul 2008	This one´s NOT very easy :D. Finding a working serial is easy to handle, but there are at least 3 algos which have to be understood for getting the serial calculation: 1 for the 4th and 8th, 1 for the first 3 and the last one for the other letters ;). I really liked your crackme. I submitted my own first crackme some days ago and rated its difficulty as 2, which, as MACH4 said, was maybe a bit too low. Now your crackme is at least as difficult as mine. I think all this "level-thing" is rather subjective, depending on one´s knowledge. Maybe some newbies didn't master this one, while some others didn't try it because they thought it was easy. I wrote a keygen for your crackme, too...will uploading everything in the evening, let´s see whether it will be approved or not.
starlight Author 22. Jul 2008	@~misunderstood~ I think you are right,maybe I'm more familiar with the C than others.But, I find I can hardly sovle a VB cme.
costy 29. Jul 2008	Really nice crackme.

stars2000's N-GEN Silevere #1

Download crackme_1_sc.zip, 23 kb (password: crackmes.de)
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Serial Cracking Good for a beginner

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 06. Jul, 2003
Downloads: 1185

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Solutions

Solution by Daxxar, published 29. jul, 2003; download (24 kb), password: crackmes.de or browse.

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Solution by stars2000, published 08. jul, 2003; download (6 kb), password: crackmes.de or browse.

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Solution by Scortile, published 07. jul, 2003; download (1 kb), password: crackmes.de or browse.

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stars2000's stars2000 #1

Download login.zip, 497 b (password: crackmes.de)
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Easiest possible crack-me

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 06. Jul, 2003
Downloads: 887

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Solutions

Solution by Scortile, published 08. jul, 2003; download (1016 b), password: crackmes.de or browse.

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stars2000's stars2000 #2

Download stars2k2.zip, 28 kb (password: crackmes.de)
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Tougher serial for beginners

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 13. Jul, 2003
Downloads: 980

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starzboy's De-Kryptzo [1&2]

Download De-KryptZo[1nd2].zip, 5 kb (password: crackmes.de)
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Rules!
no patching ... unless ur totally clueless !
no bruteforcing
find valid serial
and tut plz . . .

Enough Hints Given ...
Unless you Enter a Valid Serial ... the Decryption will be wrong and the
app will crash !
On entering a Correct Serial ... you will get a goodboy message !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 26. Mar, 2007
Downloads: 605

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Solutions

Solution by sharpe, published 09. apr, 2007; download (3 kb), password: crackmes.de or browse.

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sharpe 03. Apr 2007	Hi starzboy, I like these. It's kinda like my last one but I did some signature checks to ensure that the decrypted code will execute. Perhaps that makes it too easy though.

starzboy's De-KryptZo - 2

Download De-KryptZo2.zip, 2 kb (password: crackmes.de)
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Greetz PPL ...

Yea ... finally a part 2 ...
part was easy defeated with luck ...
but here i have decided to screw up ur luck .. he he he

Rules!
no patching ... unless ur totally clueless !
no bruteforcing
find valid serial
and tut plz . . .

Mail tut to me ...

starzboy / iCU
starzboy@gmail.com

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 26. Mar, 2007
Downloads: 459

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Discussion and comments

ReDucTor 26. Mar 2007	nicely done, however would have been better to have some sort of check for when the decryption key isnt correct, the code above the encrypted code should not be there i reckon, reveals to much about the encrypted code.
Kostya 27. Mar 2007	Lol. I'm entering my name: Kostya, & any key (length 4 chars). And it works! )) Haven't tryed it yet, but this was just for test.. So I'm soo lucky x)
starzboy Author 27. Mar 2007	lolz ... Kostya ur lucky ... i hope the others dont get too lucky like you .. lolz
Zaphod 05. Apr 2007	I didn't have Kostya's luck so I had to do it the hard way! I found a working name/serial-combination, but not without a certain amount of bruteforce. Can it really be done without bruteforcing?
jE! 15. Nov 2007	hellllo, AUTHORRE! i was looking in your crackme & found some strange things: 1. cmp eax, 3 ja ... "more than 4 chars plz" ??? Q: so more then 3 or 4? ;; 2a. ;00401116 movsx ebx, byte ptr [edi+eax+1] name_string calculation begins from 2nd char, so skipsss first char & includes 1 NULL byte after string; is THIS ERROR or OK? ;; 2b. ;004011DD movsx ebx, byte ptr [edi+eax+5] key_string calculation begins from 6th char, so skipsss first 5 chars & includes 5 NULL byte after string; is THIS ERROR or OK? ;; Final Q: Before i start keygening, have YOU your keygen for it? (btw, how about preserving registers in DLG_FUNC;?;)
morecode 07. Apr 2015	Name = Alejandra Serial 1234567890abcdef I was very lucky

starzboy's KeygenMe#3

Download Keygenme#3.zip, 128 kb (password: crackmes.de)
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As usual....a very easy keygenme in C++ !
You have to find the valid Security code,Password and secret code....for you name....!
Patching and brute forcing is disallowed !

Then make keygen and Tutorial !
Hope you enjoy it ~

Greeting'Z to : TSRh,SnD,ICU,{RES},MP2K !

This is done espicially for newbies learning to Keygen....Algoritm is very easy so you can try keygenning !

~starzboy~

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 13. Jul, 2006
Downloads: 1308

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Solutions

Solution by Kostya, published 18. jul, 2006; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

megadoctor 15. Jul 2006	No, this is not Easy for newbies, im an newbie and i don't even have a clue how to crack this...
Kostya 16. Jul 2006	Yep, easy. I like it. ;)
starzboy Author 19. Jul 2006	well i am sorry megadoctor.....you had a little problem... Kostya.....has done it well and you will understand..... meanwhile....Kostya wait for the next one ..... and i hope you all enjoy my keygenme's !

starzboy's Keygen me # 2

Download Keygenme_#_2.zip, 128 kb (password: crackmes.de)
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k....here is the second one.....
rules are same....read nfo...no patching !
you have to make a valid serial for name and info !....then keygen it !

....kontinue !

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 14. Jun, 2006
Downloads: 1230

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Solutions

Solution by c_07, published 02. jul, 2006; download (4 kb), password: crackmes.de or browse.

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Solution by Ank83, published 22. jun, 2006; download (26 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 15. Jun 2006	i have solved this in ARTEAM forum, its very easy!
c_07 24. Jun 2006	Ank83, the keygen doesn't work
Ank83 24. Jun 2006	c_07 you are right. I uploaded the wrong file by mistake. Thank for the notice. I upload the right one now. Regards Ank83
kaoyange 09. Jun 2014	Do you have a problem when you test this keygenme? Although the author promises the User-ID contains only number,the number can not be too large,not above 2147483647.When you input a number larger than 2147483647,you will always get the result:Access Denied.

stefanie's easy crackme 1

Download easycrack1.zip, 2 kb (password: crackmes.de)
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knock yourself out.

you are free to do anything except patch. discover the crackme's algorithm
and make it print the string "cracked!".

source available upon request.

cheers.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 11. Jul, 2006
Downloads: 572

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Solutions

Solution by crp-, published 22. jul, 2006; download (2 kb), password: crackmes.de or browse.

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stefanie's grainne

Download grainne.zip, 2 kb (password: crackmes.de)
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you'll know when you've cracked it.
use the password (case sensitive) to unzip the source code.

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: Assembler

Published: 05. Jun, 2007
Downloads: 516

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Solutions

Solution by bdcht3, published 10. dec, 2013; download (2 kb), password: crackmes.de or browse.

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Solution by Yoha, published 14. feb, 2013; download (3 kb), password: crackmes.de or browse.

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Solution by lagalopex, published 05. jun, 2007; download (1 kb), password: crackmes.de or browse.

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stefanie Author 14. May 2007	is anybody able to run this cm at all? i've had reports about segfault on some machines. tested it on gentoo-sources 2.6.12.
prout 15. May 2007	Hi, I had a segfault under Ubuntu Edgy....
-Lord Virus- 15. May 2007	I have a problem.!. i cannot run this in Ubuntu.!. I'm going to try in RedHat.
stefanie Author 15. May 2007	what kernel versions you guys using? that's the only lead i've got as of the moment.
digitalbyte 20. May 2007	hi, with me it is segfaulting on Ubuntu Feisty Fawn Kernel: uname -srvmo: Linux 2.6.20-15-generic #2 SMP Sun Apr 15 07:36:31 UTC 2007 i686 GNU/Linux debug (notice that my offsets wont be yours because of ASLR): my eip is: 0x804800c and then it's segaulting here Program received signal SIGSEGV, Segmentation fault. _______________________________________________________________________________ eax:00000000 ebx:00000000 ecx:00000000 edx:00000000 eflags:00010292 esi:00000000 edi:00000000 esp:BFE32E80 ebp:00000000 eip:08048010 cs:0073 ds:007B es:007B fs:0000 gs:0000 ss:007B o d I t S z A p c [007B:BFE32E80]---------------------------------------------------------[stack] BFE32EB0 : E7 3C E3 BF 17 3D E3 BF - 45 3D E3 BF 58 3D E3 BF .<...=..E=..X=.. BFE32EA0 : 2B 3A E3 BF 3D 3A E3 BF - 4C 3A E3 BF 6C 3A E3 BF +:..=:..L:..l:.. BFE32E90 : BE 39 E3 BF C9 39 E3 BF - DD 39 E3 BF ED 39 E3 BF .9...9...9...9.. BFE32E80 : 01 00 00 00 85 39 E3 BF - 00 00 00 00 AA 39 E3 BF .....9.......9.. [007B:BFE32E80]---------------------------------------------------------[ data] BFE32E80 : 01 00 00 00 85 39 E3 BF - 00 00 00 00 AA 39 E3 BF .....9.......9.. BFE32E90 : BE 39 E3 BF C9 39 E3 BF - DD 39 E3 BF ED 39 E3 BF .9...9...9...9.. [0073:08048010]---------------------------------------------------------[ code] 0x8048010: add al,BYTE PTR [eax] 0x8048012: add eax,DWORD PTR [eax] 0x8048014: add DWORD PTR [eax],eax 0x8048016: add BYTE PTR [eax],al 0x8048018: or al,0x80 0x804801a: add al,0x8 ------------------------------------------------------------------------------ 0x08048010 in ?? () gdb> n Program terminated with signal SIGSEGV, Segmentation fault. The program no longer exists. _______________________________________________________________________________ Error while running hook_stop: No registers.
lagalopex 20. May 2007	I changed the first two jz to jnz and it's now working for me.
prout 20. May 2007	I'm running a 2.6.20 on Ubuntu Feisty Fawn...

stefanie's grainne2

Download grainne2.tar.gz, 1021 b

this crackme is dedicated to Grainne C. Yap - the girl who broke my heart.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 13. Jul, 2008
Downloads: 442

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Solutions

Solution by fungos, published 12. aug, 2008; download (5 kb), password: crackmes.de or browse.

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Download moreboredthanyou.tar.gz, 2 kb

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stefanie's MoreBoredThanYou

you know the drill ... no patching. have fun.

source code available upon request

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 11. Aug, 2006
Downloads: 526

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by lagalopex, published 12. may, 2007; download (770 b), password: crackmes.de or browse.

lagalopex has rated this crackme as nothing special.

Solution by crp-, published 17. sep, 2006; download (4 kb), password: crackmes.de or browse.

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Solution by macabre, published 15. sep, 2006; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

stefanie Author 18. Sep 2006	wow... as what we say here in the philippines... "i still need to eat more rice." bows to the real reversers in crackmes.de you guys are gods in your own right!
Apotheoz 02. Aug 2012	It segfaults on my Ubuntu 12.04 x64 :<

sten's smallcrkme

Download sten_crk1.zip, 1 kb (password: crackmes.de)
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one of the smallest dos crackme. why is ...

Difficulty: 4 - Needs special knowledge
Platform: DOS
Language: Unspecified/other

Published: 11. Jul, 2002
Downloads: 807

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Solutions

Solution by crook, published 11. jul, 2002; download (955 b), password: crackmes.de or browse.

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stigger's stigger

Download stgcrme1.zip, 2 kb (password: crackmes.de)
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hm...my first crackme.i think,it is not difficult...enjoy =)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 06. Feb, 2005
Downloads: 2061

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Solutions

Solution by Jeremiel, published 08. feb, 2005; download (9 kb), password: crackmes.de or browse.

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Solution by _HellDashX_, published 08. feb, 2005; download (88 kb), password: crackmes.de or browse.

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Discussion and comments

Aenox 06. Jun 2005	Crashes on open
deibiz_xxl 25. Jun 2005	Under WinXP works perfectly
Immortal_One 28. Jun 2005	Under 98se works ok :)
_khAttAm_ 29. Jun 2005	Crashes under XP SP2 Home................. I tried it on that only.................... Or am I supposed to patch it so that it runs without crashing??
elfz 29. Jun 2005	crash confirmed, xp sp2 pro.
Knight 29. Jun 2005	Well i'm using win xp sp2 pro and it runs fine.
kao 29. Jun 2005	Not matter what OS - crashes when "Current Directory" <> "Directory where crackme.exe is located". Proof: put crackme.exe in c:\temp and from C:\ run command "c:\temp\crackme.exe". The do "cd Temp" and try again.. ;)

stonerifik's stoner crackme 1

Download stoner_crkme1.zip, 4 kb (password: crackmes.de)
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serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Nov, 2003
Downloads: 1957

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Solutions

Solution by Bytedevil, published 06. dec, 2003; download (1 kb), password: crackmes.de or browse.

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Solution by elfz, published 01. nov, 2003; download (1 kb), password: crackmes.de or browse.

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strength1's CrackMe 1 by strength

Download crackme_1_by_strength.zip, 5 kb (password: crackmes.de)
Browse contents of crackme_1_by_strength.zip

My first CrackMe written in C language.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 28. Nov, 2013
Downloads: 1233

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Solutions

Solution by abrahamf, published 09. dec, 2013; download (1 kb), password: crackmes.de or browse.

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Solution by tinqnpro, published 09. dec, 2013; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

givses 29. Nov 2013	What do you want to crack? To display "Congratulations"? Or what?
evaboy 29. Nov 2013	@givses: I think that's that.
evaboy 29. Nov 2013	Yeh, cracked. @Strength: the program keeps beeping and shows "Cracked Congratulation" as l cracked it. Is it ideal? Answer me before l upload my tutorial. Nice algo! Bring more.
zairon Moderator 01. Dec 2013	Yes, the congratulation message appears as the caption of the dialog box.
strength1 Author 04. Dec 2013	evaboy: yes, it is ideal :) (sorry for delay)
abrahamf 04. Dec 2013	My first CrackMe and it was a headache! Really nice program i learned a lot with it thanks!!!, i've uploaded a solution with the key in it, hope you accept it.
strength1 Author 09. Dec 2013	And where is your solution evaboy? ;)
evaboy 10. Dec 2013	@strength: sorry it was rejected by admin.
leptepkt 30. Aug 2014	I found that string and I don't know how to display Congratulation LOL. At the beginning I change this address memory to that string and run but nothing happen :/

strength1's CrackMe 2 by strength

Download crackme_2_by_strength.zip, 4 kb (password: crackmes.de)
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My second CrackMe written in C language.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 09. Dec, 2013
Downloads: 1250

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Solutions

Solution by fish2fry, published 14. dec, 2013; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

cl0pen 13. Dec 2013	Sorry if this is a dumb question (new to these) but how are you supposed to pass input to the executable? There's no input boxes or anything.
strength1 Author 13. Dec 2013	"You must find way to crack this shit :-)"
evaboy 14. Dec 2013	Huh!! Plz give us some hints. @Strength.
TragedyXD 16. Dec 2013	i'm agree with @cl0pen i have no idea, Plz give us hints. thanks.!
strength1 Author 16. Dec 2013	You can read solution...
Unknown Coder 22. Dec 2013	soloved it :)))
ronakai 07. Feb 2014	annoying crackme...
strength1 Author 14. Feb 2014	Maybe just too hard for you :P
kerwin 22. Feb 2014	very easy ? no , very very hard . what the way ? LRESULT __stdcall sub_C71000(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
botanyaki 13. Apr 2014	oh my god lol I reversed this software 2days. finally I gived up and download the solution and read. This is the best funny crackme. Was not this idea.. Thank you for your crackme.
botanyaki 13. Apr 2014	oh...shit...my bad. above comment is for #1 crackme. I"m sorry.
puelo 10. Aug 2014	Funny little CrackMe. Not like something like this would ever happen in a real-life application :o)

student's StudME_01

Download StudME_01.zip, 2 kb (password: crackmes.de)
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serial

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 24. Dec, 2004
Downloads: 964

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Solutions

Solution by jack_theripper, published 14. jan, 2005; download (9 kb), password: crackmes.de or browse.

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sub7's Tr1ck 4ccess

Download TrickAccess.zip, 15 kb (password: crackmes.de)
Browse contents of TrickAccess.zip

Make A Crack / Keygen To Find The Secret Message :p

Real basic program in VB 6.0

Dis Is Prolly Easy... I dunno you guys tell me!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 10. Dec, 2005
Downloads: 1100

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by costy, published 12. jan, 2006; download (73 kb), password: crackmes.de or browse.

costy has rated this crackme as boring crap.

Solution by delly, published 18. dec, 2005; download (16 kb), password: crackmes.de or browse.

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Discussion and comments

sub7 Author 25. Dec 2005	Thnx delly. Reccommended for noobs then i guess :)
HMX0101 25. Dec 2005	the only way to crack this is make a selfkeygenning, because the number changes constantly.
syhs89 07. Jan 2006	no wonder.... btw , can anyone explain me how does olly do the stack thing, which is looks for what the original password??
skapunky 14. Sep 2007	If i insert string's, there are a error of ejecution. Only numbers..see this.

SubmiN|KinG's .NET Crackme No.1

Download crackme_no1-n00b.zip, 7 kb (password: crackmes.de)
Browse contents of crackme_no1-n00b.zip

***************************n00b**
** **
** Name : Crackme No.1 **
** Coding : Noob-Average **
** Protection : Noob-Average **
** **
** Restrictions: No patching! **
** **
**2oo8***************************

This simple crackme has 4 levels,
which basically holds the 4 basic
levels for each newbie .NET cracker
to beat before even considering
any commercial or harder crackmes
within its genre.

Tools needed:
-------------
.NET Reflector
Your favourite coding language
Brain
Music (to get in the mood :P)

..:: GREETZ ::..
----------------
Crosys (wazza - if life is a pow, u must be the mod :P)
0x87k (where ya at?)
lafarge (when is the next tune comin?:P)
HMX1010 (long time no see man, msn?!?:D)
Niyelana (just ask man;))
melatonin (we miss u dude:/)
futureproof (hola!)
ScareByte (when am i gonna see u on #phrozencrew again? :/)
...and probarly some more fellas too...

/Regards, n00b

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 10. Mar, 2008
Downloads: 724

Rating

Votes: 7
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by M|GHTY K|nG, published 17. mar, 2009; download (266 kb), password: crackmes.de or browse.

M|GHTY K|nG has rated this crackme as quite nice.

Solution by cosmos, published 13. mar, 2008; download (167 kb), password: crackmes.de or browse.

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Discussion and comments

MACH4 10. Mar 2008	Thanks n00b, Quite simple, took 15 mins to keygen, should have been quicker but still learning vb.NET. MACH4
SubmiN\|KinG Author 11. Mar 2008	Good going :=) /n00b
Kurapica 11. Mar 2008	nice one..... I hope to see more .NET stuff around.
thomas.idpz.net 11. Mar 2008	really fun ! :)
Razor1988 11. Mar 2008	Very Easy, took 5 mins to make an keygen.
xylitol 12. Mar 2008	i'm not .net cracker i wait a solution for learn :)
dom1n00 13. Mar 2008	Bug or not? Does not accept the lower-case solution on the 4 level, only the capital letter.
SubmiN\|KinG Author 13. Mar 2008	Not a bug ;) Thats a rule I coded in to make it a bit more interresting :=) /SK
r00ster 03. Apr 2008	nice but very simple
syhs89 21. Apr 2008	can explain on level 3 n 4 ?
syhs89 21. Apr 2008	shouldn't 3rd level be n00b : n00b-1F60 ??
syhs89 21. Apr 2008	i noe d... - - stupid me hex need change to decimal.. lolz
basfreak 05. Jul 2008	This was realy easy done in a few minutes.
xbiohazardx 14. Sep 2008	pretty easy, not bad. kinda fun. :)
+NCR 18. Mar 2009	nice .net crackme! very easy but very funny!
T.0.R.N.A.D.0. 19. Mar 2009	LOL !!! Very easy but funny too.

SubmiN|KinG's BreakMe #1

Download BreakMe_No1.zip, 165 kb (password: crackmes.de)
Browse contents of BreakMe_No1.zip

SK's BreakMe #1:
----------------
Written in .NET, and the following rules apply:
-NO PATCHING
-NO BRUTEFORCE
-NO CHEATING
-KEYGEN ONLY!

/Enjoy this one!

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 15. May, 2008
Downloads: 486

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Solutions

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Discussion and comments

HMX0101 15. May 2008	Lol, this is a joke? :P I don't think its a level 3, probably a level 2 or 1 ;) This is easy even for me, which i'm a .NET noob :P
SubmiN\|KinG Author 15. May 2008	maybe easy for u bro, but what about the dedicated .NET freaks who has no clue about x86 in general? :P
obnoxious 17. May 2008	Mach 4 plz make a video soln for this 1. N yeah looking forward to HMX0101 's soln. I cdnt make any sense of the code in reflector. :-(
Zaphod 19. May 2008	I know very little about .NET, but I do think I understand the functions shown in Reflector. That does not help me to solve the crackme, however. Olly isn't much help here. I can break several places in ADVAPI or rsaEnh or mcorwks, but that doesn't get me anywhere. I hope someone writes a solution. What do you say, HMX0101?
costy 19. May 2008	the problem is emulating the GetHashCode with another language. How do it in c++??
costy 20. May 2008	crackme uses GetHashCode. So keygen should use GetHashCode but I have not Visual Studio so I can not write a .Net application. How can I write a keygen emulating GetHashCode with another language??
MACH4 20. May 2008	I'm not sure that you can unless you can locate the hash algorithm somewhere! I don't think its very complicated, just needs to be found if you want to use it in another language. could be making things difficult for yourself though because GetHash & GetHashCode usually involves a few other cryptos in most Crackmes of that type.
costy 21. May 2008	okok I'm downloading Visual Studio Trial from Microsoft Site
SubmiN\|KinG Author 31. May 2008	no solution yet? it cant be that hard....
TiGa 31. May 2008	MSDN has many examples on how to use GetHashCode in other languages than the .NET Framework.
Jim~ 31. May 2008	costy, open up relfector and use it to analyze mscorlib->System.String.GetHashCode ;)
MulleDK13 01. Jun 2008	I think it's quite easy, but damn there is a lot of functions, that needs to be analyzed -.-
costy 12. Jul 2008	Could someone explain something about this crackme?? All is unreadable.
costy 12. Jul 2008	I want to mean how is it possible to understand something like these lines: Dim ░2 As ░3 = ░3.op_RightShift(k, shiftVal) Return ░3.▄38(P, Q, ░2, n, constant, shiftVal) Strange net application.
MACH4 12. Jul 2008	Those weird symbols have replaced the original plain names. its for making the code harder to read and also will crash VS if you try to copy & paste them. Have a look at one of my previous tutes, it shows a manual way to sort them out into understandable names. If these function hieroglyphics grow much more it will be worth considering dumping into a file a run some scripts on it (find and replace). Beware some names especially in function definitions might have to be changed back to original names to work. BTW. when I see GetHashCode in crackmes I'm always a bit cautious because the outcome is not guaranteed to be unique, at least not in a double, string or arrays...
costy 14. Jul 2008	I read them. T he dump fuction of net reflector doesnt work really well. Infact if i dump a normal application it gives me a lot of problems. I usually copy and paste code manually. If it gives me problems with standard application... It surely dont work on this one. I hope someone send a solution explaining how does he solved it and what tool he used. I hope the author will give some helps. Bye.
MACH4 14. Jul 2008	Their from the unicode character set, VS don't like unicode and reflector gets a bit sticky with it sometimes but you can copy and paste it after a few attempts. might be easier to dump it into notepad with the unicode option on, it will preserve the characters
costy 15. Jul 2008	Really interesting. MACH4 your informations are really interesting.

SubmiN|KinG's CKeygenMe #1 CuStOm

Download n00b-ckeygenme#1.zip, 5 kb (password: crackmes.de)
Browse contents of n00b-ckeygenme#1.zip

Short Info:
-----------
This keygenmes is using a custom crypto-solution I came up with while I was working on some other stuffs, and Im also using my very own Obfuscator on the target aswell - its not possible to get the tool off from anywhere, so its homemade by other words ;)

Rules:
------
-No patching...
-No self-keygenning (says itself)...

When done:
----------
Send your solution, and make yourself proud by overcoming this little tricky keygenme :=)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 07. Oct, 2007
Downloads: 676

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by __imp__, published 12. oct, 2007; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 07. Oct 2007	Hehe, obfuscation is very poor and algo isn't so hard as you thing ;)
TiGa 07. Oct 2007	Difficulty lowered, again. ;) It's definitively tougher than 1.
br0ken 08. Oct 2007	Leave the name and pass field blank, and the proggie is registered. Is this a bug?
__imp__ 08. Oct 2007	This one is very easy, not more than 5 minutes to make a keygen (I have made it). imho, it's a level 1. P.S. And yes, blank name and serial fields give the correct message. Apparently, it's a bug.
Zaphod 09. Oct 2007	If this is so easy I hope someone will post a solution soon. I have just installed the .NET frames and this is the first .NET program I have ever run. As I understand it, .NET is something like Visual Basic - is there a .NET decompiler? And is there some special knowledge you just need to have to solve this one?
HMX0101 09. Oct 2007	@Zaphod: just use Reflector and you'll solve it fastly ;)
Zaphod 10. Oct 2007	Thanks, hmx0101 - I have just downloaded Reflector, hopefully it helps...
Jim~ 11. Oct 2007	Would be better if you obfuscated the contents of the methods instead of just renaming them. Not hard to find the algo if there's only 2 methods to look in. :P
migol 03. Mar 2008	poor obstrufication, only names are changed to be unreadable

SubmiN|KinG's CKeygenMe No.1

Download ckeygenme.zip, 256 kb (password: crackmes.de)
Browse contents of ckeygenme.zip

Your mission is to create a fully working keygen, without making any patches whatsoever!

Should also notice, this keygenme is NOT for newbies!!

Give it a try, and send me your solution ;)

/n00b

Mail: n00bmk@gmail.com

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 31. May, 2007
Downloads: 507

Rating

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Solutions

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Discussion and comments

mrmag 02. Jun 2007	When I try to run ckeygenme.exe many instances of vsjitdebugger.exe get startet automatically (the just-in-time-debugger of Visual Studio) ... and I have to manually kill your process to stop it.
SubmiN\|KinG Author 02. Jun 2007	hmm... weird, i havent got that error from any other ones yet....
HMX0101 02. Jun 2007	Easy one, after you know which lib uses for every algo and how it's used :P...
fjlj 03. Jun 2007	thought this crackme was pretty easy and a bit more hyped than it should be but i enjoyed it. and i hope you like my keygen ;) lol.

SubmiN|KinG's CryptoMe .NET #1

Download cryptome_#1-sk.zip, 239 kb (password: crackmes.de)
Browse contents of cryptome_#1-sk.zip

*************************************
**
** Name : CryptoMe .NET #1
** Coding : Average
** Protection : Average/Hard
**
** Restrictions: No patching!
**
*************************************

This simple CryptoMe has just a few
algos - But there is one major rule:
NO PATCHING whatsoever!

I know it may be hard to realize that
patching isnt allowed - but it is possible;)

Tools needed:
-------------
Brain

Goal:
-----
Best - Make a keygen in any other language
than .NET...
Good - Make a keygen in .NET...
Bad - Keygen + Patch (NOT ALLOWED!)

..:: GREETZ ::..
----------------
To the ones that support me the most!

/Regards, SubmiN|KinG

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 12. Mar, 2008
Downloads: 540

Rating

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Solutions

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Discussion and comments

elroseth 12. Mar 2008	This was quite fun. I attempted at first to look at things with ollydbg, but once I fired up Reflector it was a simple matter of looking at the checkme functions. As a novice I found this quite fun :)
SubmiN\|KinG Author 12. Mar 2008	But remember the rules matey: NO PATCHING ;) Get me a good solution + keygen, and I`ll say we`ve both been satisfied :=) /SK
grimskies 13. Mar 2008	I'm stuck at the signature. I guess I'm missing something, 'cause I don't know how to create a valid one without the private key...
SubmiN\|KinG Author 15. Mar 2008	Okay, rules have changed! If its too hard for you to make a keygen only, its now allowed to make a little patch on the side aswell - but the patch has to be in the keygen aka keygen+patch in one! Why I ask for both in one, is cuz this crackme was firstly intended for the ones that can code and crack well and not the newbie level! So enjoy! /SK
MR.HAANDI 21. Mar 2008	super, what I see is a 512bit rsa verification inside, good luck with factoring.
Filler 28. Apr 2009	Hmm, it can be so difficult... Wich function decrypts the second Dll in the Ressource?

SubmiN|KinG's KeygenMeX

Download KeygenMeX.zip, 5 kb (password: crackmes.de)
Browse contents of KeygenMeX.zip

KeygenMeX by n00b
-----------------
Just a simple keygenme for those
who are into .NET ;)

Rules:
------
1: NO PATCHING!
2: NO BRUTEFORCING!
3: KEYGEN ONLY!

Rating in difficaulty: 3/10!

/n00b

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 27. Oct, 2007
Downloads: 623

Rating

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Solutions

Solution by baudstupid, published 01. dec, 2007; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

sd333221 27. Oct 2007	This is at least 1/10. Maybe i write a solution soon
simpleuser 27. Oct 2007	no patching? you can't create those registry keys though.
SubmiN\|KinG Author 28. Oct 2007	sd333221: maybe its that easy for u, but what for a newbie? simpleuser: use ur brain-cells, patching doesnt always need to be the answer ;)

SubmiN|KinG's KeygenMe #1337

Download SK-KeygenMe_No1337.zip, 163 kb (password: crackmes.de)
Browse contents of SK-KeygenMe_No1337.zip

Heres a tricky one for you hungry keygenners....

NO PATCHING......
Thats the only rule :P

My greetings flys out to;
Crosys, HMX0101, Encrypto, 0x87k, Napalm....
bah! Too many to list, u know who u are anw ;)

/SK

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 03. Jun, 2008
Downloads: 525

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Solutions

Solution by ZaZa, published 26. jun, 2012; download (344 kb), password: crackmes.de or browse.

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Discussion and comments

SubmiN\|KinG Author 03. Jun 2008	Not sure if i rated the difficulty correct, but let me know... /SK
Ox87k 03. Jun 2008	It's hard to find some serial (and not only one) because the algo isn't based on the name but just only on a "string" that has the first 8 chars of its md5 equal to 92253E43. This means -> bruteforcing -> maybe many strings but the bruteforce can take moooooore time! I have one valid serial for this but i don't want to waste my time to verify if it can have more serial so for me this one should be a CrackMe and not a KeygenMe! ;)
SubmiN\|KinG Author 04. Jun 2008	A dumb mistake by me 0x87k, I freakin forgot about the name - LOL!
HMX0101 04. Jun 2008	Too easy, bruteforcing it just took 6 mins using the right alphabet ;)
Ox87k 04. Jun 2008	@HMX, how did you code your brute?? @.@' Mine take less than 1 minut (using 4 chars, you know, all from 0x30 to 0x7A) @SK: So this one has only one serial! :P Anyway good job, i like this king of KeygenMe! I'm waiting for you next (or maybe for a fix for this one?)
SubmiN\|KinG Author 04. Jun 2008	0x87k: dont think there will be need for a fix, already too many who has solved it. So just be patient, and i'll go on and create a new more challenging one soon :=) /SK
HMX0101 05. Jun 2008	@Ox87k: you know i code in delphi, and this language isn't very efficient for this things like assembler or c/c++ ;) I've used the same alphabet as you and used 4 chars too ;) btw, n00b have coded a bruteforce in .NET and took approx. same time ;)
obnoxious 05. Jun 2008	Some1 teach me how to make bruteforcers............plz plz
SubmiN\|KinG Author 05. Jun 2008	obnoxious: LOL! You have any idea how I coded mine? By using my mind ;) It kinda depends if you know howto code, thats it :P /SK TIP: A loop....
Ox87k 05. Jun 2008	@obnoxious: Omg, don't you know how to code a bruteforce?? Grab some level1's crackmes and start to learn something!
SubmiN\|KinG Author 05. Jun 2008	0x87k: check the newest ;) /SK
born2c0de 06. Jun 2008	lol, check my solution to w02057's CrackMe#3. It uses a well-calculated brute-force. It doesn't need a bruteforce but since his crackme had multiple valid serials for every username, I decided to walk the extra mile and get 'em all. Hence the bruteforce. The tutorial is highly detailed, and it's n00b friendly :)
strelok 09. Jun 2008	oh please please where're the tut?
Ox87k 09. Jun 2008	@strelok: Are you mean the tut for this one (this keygenme) or for the one born2c0de said?
ungeren 09. Jun 2008	HMX0101: which alphabet are you refering to ? Thanks. /UG
ungeren 11. Jun 2008	Anyone who could give any hints on which alphabet to use ? Thanks.
Ox87k 11. Jun 2008	@ungeren: look at the 5th post
SubmiN\|KinG Author 15. Jun 2008	@ungeren: i must say that is really professional thinking - asking for what todo so you can be able to crack it yourself.... shame! /SK

SubmiN|KinG's KeygenMe #BEEF

Download KeygenMe.zip, 169 kb (password: crackmes.de)
Browse contents of KeygenMe.zip

Simply a new keygenme for you guys, better this time!

NO PATCHING as usual ;)

Greetz:
--------
Crosys, HMX0101, 0x87k, smoke.... etc, too many too list ;)

/SK

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 05. Jun, 2008
Downloads: 498

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Solutions

Solution by simonzack, published 21. sep, 2010; download (39 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 05. Jun 2008	Lovely keygenme but i HATE the obfuscations! Good job man! Now i need to understand something more about .net obfuscation! ;) (even if it can be well keygennable also with the obfuscated code)
Jim~ 06. Jun 2008	The code isn't really obfuscated. Just the names of all the classes, methods, etc are changed to random symbols. Anyway, this looks like one hell of a complicated algo. Twists and turns everywhere! Looks like we'll have to bruteforce a hash. You say no patching, but would a self-bruteforce patch be acceptable? :X
TiGa 06. Jun 2008	No self-bruteforcers will be accepted as solution. It is just like patching.
Jim~ 06. Jun 2008	This is going to be hell, then :D
MACH4 06. Jun 2008	hehe, I've been away for a while but this looks like a nice one to try...
HMX0101 06. Jun 2008	Bruteforcing isn't the problem here (i've got the key), problem is identifying which public-key algo is used and i'm not talking about RSA ;) Good work, submin! You already do it possible :D
Ox87k 06. Jun 2008	I think it's ElGamal.. builder.Append("<ElGamalKeyValue>"); Btw, if i'm right (and so it's ElGamal) the main problem is to find the X.. DLP solver are running on my pc until 1 hour and nothing good for now. Maybe i'm in the wrong direction..
HMX0101 06. Jun 2008	@Ox87k: i've guessed the same as you :) and i've runned DLP Solver 3 hours ago and still nothing :/
SubmiN\|KinG Author 07. Jun 2008	@Kurapica: no cheating! let the kids play fear, and dont give them the pleasure of an un-obfuscated code :P @HMX0101 & 0x87k: good luck :P
Ox87k 07. Jun 2008	Is it really solvable with a normal DLP solver like the one on www.alpertron.com.ar/DILOG.HTM or the Resolve DLP for Armadillo?
Kurapica 07. Jun 2008	lol It's almost impossible to make a valid keygen by analyzing obfuscated code only in reflector :-{ because the algo is huge and distributed over many classes, so It's necessary to have a deobfuscated copy of the exe ! anyway even with the deobfuscated exe it's still a hard work and needs some time. if it was a real life target then I would go for a patch only :-} nice challenge anyway
SubmiN\|KinG Author 07. Jun 2008	@0x87k: i think you should consider using ResolveDLP, as 160bit is a bit big for DILOG :P @Kurapica: i didnt mean you couldnt use your own tools on it, just dont post it here - its cheating then for the others :P /SK
MACH4 07. Jun 2008	I think any really interested parties had already deobfuscated anyway, but yes still will take some time to pull it back into code which is easier to understand fully! I would have rated this higher!
SubmiN\|KinG Author 07. Jun 2008	@MACH4: what rate would you have said it was? /SK
MACH4 07. Jun 2008	Easier to judge that once I or someone else has solved it, from what I've seen so far, its clear that some real time and effort has gone into producing it, and maybe more time required to solve it, I would have thought a provisional difficulty 4. Anyway, Thanks for your crackmes, I believe they are in the top league of .NET crackmes currently available...
TiGa 07. Jun 2008	It's hard to rate .NET crackmes. Most of those that appear very hard end up being solved by a simple copy/paste of the algo from Reflector. We'll see from the solutions. From the description, if it was a "normal" crackme, it could be rated 4 or possibly even 5 but the .NET factor makes a difference. Sounds like fun though.
Ox87k 07. Jun 2008	Well, Kurapica i have already code the whole keygen, i miss only the DLP result for ElGamal part and i've done it all with obfuscated code in reflector. In the mine first post i said: "(even if it can be well keygennable also with the obfuscated code)" If you know well some crypto stuff then it's easy to understand how to defeat the algorithm but it takes a bit because of the 160bits DLP. @SK: Btw i agree with MACH4, level 4 or better 5 would be appropriate
HMX0101 08. Jun 2008	Obfuscation is poor and algo is simple, only problem with this crap is which uses a 160bits DLP! =O Keygenning it using a win32 languague makes it easy! so, i rate it as 3 or 2.5! =D I think with a level 5 its overrated ;P Just my 2 cents :D
SubmiN\|KinG Author 08. Jun 2008	@ALL: Thanks for enjoying my challenge, i really hope someone will have a solution soon :=) /SK

SubmiN|KinG's KeygenMe EASY #1

Download KeygenMe_EASY_No1.zip, 188 kb (password: crackmes.de)
Browse contents of KeygenMe_EASY_No1.zip

KeygenMe *EASY* #1 README:
--------------------------
This a rather VERY simple keygenme to aid
the newbie in learning keygenning easily.

Rules:
------
#1: KEYGEN ONLY!
#2: READ RULE No1!
#3: READ RULE No2!

My greetings flys out to:
-------------------------
Crosys, HMX1010, smoke, etc... Bah, to tired to mention them all...

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 26. May, 2008
Downloads: 1404

Rating

Votes: 4
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by xylitol, published 21. aug, 2008; download (418 kb), password: crackmes.de or browse.

xylitol has rated this crackme as quite nice.

Solution by sl4nted, published 29. may, 2008; download (12 kb), password: crackmes.de or browse.

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Solution by Haykuro, published 29. may, 2008; download (248 kb), password: crackmes.de or browse.

Haykuro has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

Kakashi 19. Aug 2008	I can fish the valid serial of my name, but i have some problems with coding a working Keygen. I know a bit ASM, but it's so hard. please help, I'm a n00b!

SubmiN|KinG's KeygenMe No.4

Download n00b-keygenmeno4.zip, 220 kb (password: crackmes.de)
Browse contents of n00b-keygenmeno4.zip

KeygenMe No.4 by n00b README:
Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨Â¨
Tasks:
1:=) Code a complete keygen...
2:=) Send your solution to me...

NOTE:
-----
This keygenme IS NOT RATED for newbies!

Mail: n00bmk@gmail.com

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 09. Mar, 2007
Downloads: 1095

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by bundy, published 18. mar, 2007; download (74 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 10. Mar 2007	Hmm, a little tricky but easy :p but i think it must be 2/10 ;)
bundy 10. Mar 2007	I agree - it's easy, but I think some newbies could still see it difficult (although - what's hard on serial fishing? ;) -> self-keygen)
Ox87k 10. Mar 2007	i guess n00b doesn't want a self-keygen but a keygen... ;)
HMX0101 16. Mar 2007	I've created a keygen for this one some time ago, but i was lazy to write a solution :p bundy, good job and i hope it can be accepted anyway if isn't accepted i going to put my hands on notepad :D
SubmiN\|KinG Author 17. Mar 2007	good work HMX0101 ;)) Loved your keygen :=)
bundy 17. Mar 2007	funny .. where did my comment disappear? ELFZ, it happened already twice this month :(
Ox87k 18. Mar 2007	ot: ELFZ Last seen: 30. Jan, 2007 @.@'
zairon Moderator 18. Mar 2007	bundy, I removed your comment. Check pm for a private talk :)
HMX0101 18. Mar 2007	bundy, good solution but you said something that's not completely right... ----- Copied from bundy solution ----- 0045AEBA lea edx,[local.4] 0045AEBD mov eax,[local.4] 0045AEC0 call 004581E8 ; ????? Really ?????. The purpose of this call was to convert this base64 string to base 2 string - but due to a bug?! it always returns: "110100110100110100110100110100110100" ----- Copied from bundy solution ----- It only return "110100110100110100110100110100110100" when name length is 4,5,6... else it return "110100110100110100110100110100110101", check it out yourself ;) This part fucked me a moment, but when i tested different names with different length i've realized it :D And yeah... its a bug.. maybe ConvertBase64to2 function modified? don't know but all is possible ;)
bundy 18. Mar 2007	I think that it is NOT dependent on length of name. The parameter to this call is base64 string of name hash (which is fixed length). In the call there is this: 0045822D \|>mov edx,0FF 00458232 \|>call <initialize6> 00458237 \|>mov eax,[local.257] ; "000000" 0045823D \|>call LStrLen 00458242 \|>mov ebx,eax The LStrLen call takes as parameter the string "000000" which is fixed also. This string is then converted to base2 string. PS: I've tried many different length serials, all of them worked. Could you write me an example name when it returns this other string?
HMX0101 18. Mar 2007	Try my keygen, plz: http://hmx0101.googlepages.com/kg4n00b-keygen.rar Anyway, i tested my keygen with a lot of names of different lengths and it worked, don't know why all name you tested are good :/ Some examples: My keygen: -------------- ABC/0236-D7FD-a8 crackmes.de/5178-255D-2f Keygenme/7D14-8BC4-90 Your keygen: -------------- ABC/C130-7C6D-e1 crackmes.de/589B-6EE7-22 Keygenme/C4C6-B7B1-61 :P
bundy 19. Mar 2007	You are right - there's something strange happening. I've tried the examples you wrote (also your keygen - nice banner btw). The first two examples - my keygen works as expected - correctly (:) at least on this machine?!). The third example "Keygenme" is the tricky one. On the very first press to "Is it correct?" button your serial works ... on later checks my serial works. Could you please check if your serial for "Keygenme" works on each click to check button? If yes, maybe this is somehow machine dependent.
HMX0101 19. Mar 2007	Yeah, it works on each click.... maybe n00b put something in it that can't be threat easily :/, maybe it deals with ConvertBase64to2 modified :(

SubmiN|KinG's KeygenMe No.8

Download n00b-keygenme_no8.zip, 5 kb (password: crackmes.de)
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This KeygenMe is written in .NET and is
hopefully a bit harder than the usual .NET
keygenme you can find out there...

Anyhow, the rules are simple;
-------------------------------------------
1: NO PATCHING!
2: KEYGEN ONLY!

*** READ THE README FOR MORE INFO! ***

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 26. Dec, 2007
Downloads: 511

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Jim~, published 03. feb, 2008; download (37 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 26. Dec 2007	Lol, no name and no serial are a valid solution :P
m@rio_crk 26. Dec 2007	difficulty - 2 Nice one but boring for someone who knows .NET. Nothing special inside, really. Keep working mate..
SubmiN\|KinG Author 26. Dec 2007	@ m@rio_crk: why is this one so easy? have u found the key even yet? @ 0x87k: ya i know, but the point of this keygenme is for the newbie to learn howto defeat stupid algorithms - not exploit the fact that i didnt set any limit there :P /Regards
Jim~ 02. Feb 2008	That was fun :) Solution submitted.
w02057 24. May 2008	Yea, theres's no presence check for both field's :0!

Suicidame's Infección Crackme

Download infeccion.zip, 3 kb (password: crackmes.de)
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Try to find the scheme

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 13. Feb, 2004
Downloads: 1100

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Solutions

Solution by kao, published 16. feb, 2004; download (3 kb), password: crackmes.de or browse.

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Suicidame's Suicidame Reto I

Download suicidamereto1.zip, 9 kb (password: crackmes.de)
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AntiDebug - Obfuscation - Some tricks - KeyGenMe

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 10. Aug, 2003
Downloads: 1128

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SUID:root's SUID:rootÂ´s Crackme #6

Download Crackme_6.zip, 258 kb (password: crackmes.de)
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-no packers, no crypters
-enable the button
-find the valid serial

button is disabled by default, find the way to enable the button.
if the button is enabled but nothing happens, the serial is wrong.

please dont patch it!

Have fun.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 09. Aug, 2005
Downloads: 1274

Rating

Votes: 5
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Solutions

Solution by sennin, published 24. aug, 2005; download (2 kb), password: crackmes.de or browse.

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Solution by missing in bytes, published 24. aug, 2005; download (26 kb), password: crackmes.de or browse.

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Discussion and comments

foenix 11. Aug 2005	do you consider modifying ressource as patching? (or we have to go loader way...)
Oorja-HalT 11. Aug 2005	Yes you have to go the other way which is the proper way. Just give it what it need in proper places of course
ingsoc 12. Aug 2005	TQN, what exactly do you not understand? If you post the solution on the discussion board, you spoil it for everyone else. This is a level-1 crackme, why don't you spend your time doing more challenging things and stop ruining the experience for everyone else. This is the third crackme for which I see you doing that.
lord__virus 16. Aug 2005	the code valid, gnerat enabled to buttonx?

Sunshine's Sunshine's Crackme #1

Download SunshineCrackme1.zip, 7 kb (password: crackmes.de)
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Sunshine's Crackme #1:
----------------------

Level : 1 (beginner - hope you like it)
OS : Windows XP
Goal : Register the crackme. Write a keygen and a solution.
Rules : No patching allowed - that would be far too easy...
You have to find a valid key for your name.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 20. Jul, 2010
Downloads: 1226

Rating

Votes: 3
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Solutions

Solution by eraghant, published 27. jul, 2010; download (15 kb), password: crackmes.de or browse.

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Discussion and comments

slackwarshik 23. Jul 2010	i download it, but it not work(( it writes, that "not set"
Zaphod 24. Jul 2010	It works fine here.
pasharp 23. Sep 2010	seems that the packet lacks a file(data.key)
pasharp 23. Sep 2010	haha,i knwon now;wo need generate the file (data.key) by ourself; i am a freshman;this packet take me almost a day to finish .but i fell very happy
cracknoob 03. Nov 2013	how can i patch it? im a noob i dont care about keygens

sunson's Crack Me No.3

Download Crackme--MD5--6D5D05932A76FF3634F976BA8B7976D5.zip, 26 kb (password: crackmes.de)
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Mentality in addition kind of Crack Me

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 15. Feb, 2006
Downloads: 351

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SuperCRacker's Crackme n°1

Download crackme_n1_by_supercracker.zip, 200 kb (password: crackmes.de)
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You can't crack this!!VERY DIFFICULT!!

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Jul, 2004
Downloads: 1413

Rating

Votes: 7
Crackme is quite bad.

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Solutions

Solution by kishfellow, published 12. oct, 2005; download (206 kb), password: crackmes.de or browse.

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Solution by D4M4G3_C453, published 05. jul, 2004; download (4 kb), password: crackmes.de or browse.

D4M4G3_C453 has rated this crackme as boring.

Solution by Oorja-HalT, published 03. jul, 2004; download (29 kb), password: crackmes.de or browse.

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Solution by kao, published 02. jul, 2004; download (5 kb), password: crackmes.de or browse.

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Solution by NaSS, published 02. jul, 2004; download (40 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

MaxM 18. Oct 2005	This is a Level 1/2 crackme; serial can be fished in few minutes: just locate the check and fish in Olly. The serial algo too, is very simple.
Lesco 19. Oct 2005	there a level 1/2 crackmes which are harder to crack
bLaCk-eye Moderator 19. Oct 2005	Modified to real difficulty. bLaCk

superman's superman's crackme 1

Download crackme.zip, 5 kb (password: crackmes.de)
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very easy!Can you write a keygen?

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 12. Dec, 2008
Downloads: 969

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Solutions

Solution by shellwolf, published 22. jan, 2009; download (26 kb), password: crackmes.de or browse.

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Discussion and comments

GordonBM 13. Dec 2008	You can't even hit the "ok" button. lol.
PeterPunk 14. Dec 2008	@GordonBM: Yes, "ok" button is disabled on the form load event. Maybe you can patch it ;) PS: Try to use VB Decompiler if you don't know where start
JeTtic 20. Dec 2008	patching the ok button was easy could anybody write a detailed tutorial how to fish the serial and find the algo?
nEwDaLs1 13. Jan 2009	ok so, I enabled the ok Button, then when i put a name and serial it doesnt do anything. doesnt say yes, or No, Just acts as if the Command button doesnt work, Opened it in Vb Decompiler, i can see the word Succss<--- Thats how its spelled, bot that doesnt show in olly. wtf :\|
shellwolf 14. Jan 2009	try __vbavartsteq....

cl0pen 25. Jun 2014	Delete if this contains too much information. Is the encryption subroutine invertible? Since the overflow is discarded, I don't think there is a way to take the required output and go in reverse.
cl0pen 28. Jun 2014	Also, can I get a working serial for this crackme? I had a math friend of mine look at the encryption algorithm, but he thinks it's mathematically impossible to create a working serial.
svan70 Author 16. Jul 2014	Thanks n0p[cc] for the solution. Is here anyone with better solution then brute force? It is possible.
n0p[cc] 31. Jul 2014	I already described the mathematical solution in my solution. But I also uploaded/updated a new solution (waiting for approval) with an implementation of the mathematical solution with Square-and-Multiply. regards
baderj 03. Sep 2014	Very good beginners crackme, highly recommend. The code can be found very elegantly indeed without brute forcing.

Svenka's Thellurik

Download thellurik.tar.gz, 3 kb

HI,

Thellurik is my first keygen-me for linux systems,
i hope you will enjoy it. It's surely easy for veteran
but surely interesting for others.

bye

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 31. Jan, 2007
Downloads: 473

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Solutions

Solution by macabre, published 19. feb, 2007; download (8 kb), password: crackmes.de or browse.

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Solution by stefanie, published 19. feb, 2007; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

macabre 02. Feb 2007	Awesome Job! Fun ELF header manipulations. I had to patch my libOFF for ald to work... lol! :D
Svenka Author 03. Feb 2007	Hehe macabre , i'm glad that you are interested by this crackme, if you have the time does not hesitate to write your solution it could be nice for others :) bye
macabre 04. Feb 2007	Ok, I submitted a solution with keygen and the patch to ALD if anybody wants to use ald to solve your crackme. Patching isn't totally necessary... like you said the algo is easy. So if you can disassemble it (say with IDA) you can write a keygen with ease. But the ELF header stuff was fun :D Thx again.
Svenka Author 20. Feb 2007	nice solutions =)

sverson's crackme - ExeProtection

Download crackme.zip, 45 kb (password: crackmes.de)
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crackme.exe is a little "Hello World" demo of my new ShareWareProtection. It's written in PureBasic. (Both crackme and the encryptor)

In this little demo there is no RegInputMask so you have to edit crackme.ini - and you have to find out what license key is missing and where crackme it takes from.
I hope there is no way to get it running without the key! ;)

Of course you can buy/license the sw (open user?.zip) and build a license free copy!
But i want you to crack it and make a copy without user name in the title bar. Or write a KeyGen to create your own crackme.??? RegKey file. But don't use user?.zip to help you doing this!

Have fun! - And tell me what you think about this way of protection.

---------
The difficulty of your crackme: I actually don`t know ;)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Unspecified/other

Published: 26. Jun, 2006
Downloads: 361

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sverson's KeyGenMe #1

Download KeyGenMe.zip, 26 kb (password: crackmes.de)
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Language: PureBasic
Protection: various ;-)

Everything is allowed!

Get the message of page 2.
See KeyGenMe.txt.

Send me feedback - - please...

Have fun!

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Unspecified/other

Published: 08. Jul, 2006
Downloads: 201

Rating

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Solutions

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Send a message to SV Reverser »

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Discussion and comments

red477 09. Jul 2006	Nice one.Looking into it;)
thehyper 09. Jul 2006	unpacked it. what is the range of characters? I have already tried 0-z.
thehyper 09. Jul 2006	i got solved it but how do i enter non printable ascii characters in an edit box??
HMX0101 10. Jul 2006	Press Alt(left) + Num Keypad :P
thehyper 10. Jul 2006	I tried it many times. I did alt+9 but GetWindowTextA stores 0x3f in the buffer. btw, I have solved it. I used SendMessage :P
znycuk 10. Jul 2006	@thehyper try alt+009 instead, i don't know why but alt+9 gives the same as alt+063 (?)
thehyper 11. Jul 2006	@znycuk, alt+009 does not work in the edit box of the crackme. But it works in notepad. Thanks.
sverson Author 11. Jul 2006	@thehyper 0-9 is OK. You don`t need "non printable ascii characters" ;-) sverson
hardcoder 14. Jul 2006	@hypher.. How did you fix the header and import table..lol

SV Reverser's SV_KeygenMe

Download SV_KeygenMe.zip, 3 kb (password: crackmes.de)
Browse contents of SV_KeygenMe.zip

Goal : Find a valid name/code and/or code a keygen to have the good messagebox.
Patching is not allowed. No anti-debug. 100% asm.
Try it, this one is a little original ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Assembler

Published: 10. Sep, 2006
Downloads: 617

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Solutions

Solution by red477, published 15. sep, 2006; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

SV Reverser Author 11. Sep 2006	Perhaps, level 3 ... ?
BaKaE 11. Sep 2006	i test it today (maybe a sol tommorow ;-))
red477 11. Sep 2006	Nice idea. Solved it;)
BaKaE 12. Sep 2006	im nearly there solving it (95% understood) next try today
SV Reverser Author 15. Sep 2006	Nice red477 ! good work !
Ebba 21. Nov 2006	i dont' get it.. can someone explain this better way?
zairon Moderator 21. Nov 2006	Ebba, what exactly?
aj3423 26. Nov 2013	Very interesting

swiftdamnation's KeygenMe#1 by Swift

Download Crackme_#1_-_Swift.zip, 8 kb (password: crackmes.de)
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Crackme #1 by Swiftdamnation...

The game is to find the serial routine, and write a keygen and tutorial.

RULES: No patching...

Have fun!
-Swift

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: (Visual) Basic

Published: 19. Jan, 2008
Downloads: 200

Rating

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Discussion and comments

TiGa 19. Jan 2008	Custom packer even if PEiD sees Upack or NsPack.
swiftdamnation Author 03. Feb 2008	Nobody has solved it yet? C'mon people... ;-)
DigitalAcid 04. Feb 2008	Well, i unpacked it. Fished serial and ativation code. But can't be bothered to find out the whole algorithm. However, it seems to use some windows stuff.
HMX0101 04. Feb 2008	That's a simple packer to unpack, so isn't harder that part :))... about the algo, it uses CryptoAPI... this is a pack: RSA + MD5 or SHA1.. if i'm not wrong :))...Its not harder at all... I don't have keygenned yet (and i'll not :) but i've see this protection in some commercial proggys :DD
swiftdamnation Author 10. Feb 2008	Aw come on...I agree it's not very hard, just try a keygen. Some weird stuff happens to the serial/activation code besides being encrypted, I just would like to see a working keygen. No self-keygenning or fished serials.
HMX0101 11. Feb 2008	Nothing harder... just RC4 + MD5 (cryptoapi)... i think this one its overrated... btw, vb suxxx =D

swizzeron's Nollats (Crackme #1)

Download Nollats.zip, 8 kb (password: crackmes.de)
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This is the biggest challenge for the novices and sleepless nights for Pros you will have some zing cracking this.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 19. Apr, 2005
Downloads: 1481

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Solutions

Solution by fjlj, published 07. may, 2005; download (10 kb), password: crackmes.de or browse.

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Solution by Contritus, published 07. may, 2005; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

S!x0r's Crackme#1 by S!x0r

Download Crackme#1_S!x0r.zip, 6 kb (password: crackmes.de)
Browse contents of Crackme#1_S!x0r.zip

First, sorry for my bad English my main language is German

I have been created a keygenme, called Crackme#1
It is not so hard,but nothing for newbies.
The difficulty is your choice.

The Goal: Create a working keygen

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 07. Dec, 2014
Downloads: 329

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Solutions

Solution by Office Jesus, published 17. dec, 2014; download (24 kb), password: crackmes.de or browse.

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Solution by redoC, published 17. dec, 2014; download (251 kb), password: crackmes.de or browse.

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Solution by baderj, published 17. dec, 2014; download (123 kb), password: crackmes.de or browse.

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Discussion and comments

redoC 07. Dec 2014	Does you used any special bignum library?
redoC 07. Dec 2014	Anyone good in modulo arithmetics? Here's the algo: Big_md5hash = MD5 (username) // username slightly modified BigConst = AD08D0361CC7FE8D1D3EAC5A68394C95 BigNum = BigSerial // 'Code' number _004011D1: for (i=0; i<15; i++) { BigNum = BigNum // power of two BigNum %= BigConst // modulo } _004011F2: BigNum = BigNum BigNum *= BigSerial BigNum %= BigConst // final condition: BigNum == Big_md5hash
S!x0r Author 07. Dec 2014	No special bignum. With the IDA flirt signature called "RESIGSv014PUB RE-SIGS v0.14 PUBLIC by dihux" You can create a label.map for OllyDBG Sorry for my bad English
S!x0r Author 07. Dec 2014	Sry... I see, you have understand this Code.
redoC 08. Dec 2014	(maybe important) correction: after computing Big_md5hash first five bytes of it is overwritten to 53 21 78 30 72
tamaroth Moderator 09. Dec 2014	redoC: you're very close, you must first grasp what the loop does. If you look at it, in most simple form, it multiplies our serial by itself 15 times, this looks something like this if you unroll the loop: 01: s * s = s ^ 2 = s ^ (2 ^ 1) 02: (s ^ 2) * (s ^ 2) = s ^ 4 = s ^ (2 ^ 2) 03: (s ^ 4) * (s ^ 4) = s ^ 8 = s ^ (2 ^ 3) 04: (s ^ 8) * (s ^ 8) = s ^ 16 = s ^ (2 ^ 4) and so on... By now you should see that at the end of the loop, the result will be s ^ (2 ^ 15) and it will be multiplied by itself once more so we get s ^ (2 ^ 16) and multiplied by original self, giving us the final value of (s ^ (2 ^ 16)) * s = s ^ ((2 ^ 16 + 1) Now, what is numerical value of (2 ^ 16) + 1 in decimal and hexadecimal? once you answer this question, you will continue with the rest no problem! Best regards, tamaroth
redoC 09. Dec 2014	Thanks dude redoC : 9E110727261B5B301BACC23860A7880B
S!x0r Author 09. Dec 2014	@tamaroth Realy nice! @redoC Correct!
tomkol 09. Dec 2014	tamaroth you spoiled the whole fun for redoC with figuring out it's three letters crypto :)
S!x0r Author 20. Dec 2014	Thanks a lot, for all solutions.
Mimo0Cool 28. Dec 2014	Just Modifie some jump ... i didn't use the correct password :/' http://im75.gulfup.com/Q1afS6.png
tamaroth Moderator 30. Dec 2014	Yeah, I guess it's a big spoiler. Next time just little hints :>

S!x0r's Crackme#2 by S!x0r

Download Crackme#2_S!x0r.zip, 6 kb (password: crackmes.de)
Browse contents of Crackme#2_S!x0r.zip

Hello,

Because my first crackme was really fast solved, I created another crackme.

I hope, it is a little bit harder.

The main target is: Create a keygen.

Have Fun!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 25. Dec, 2014
Downloads: 348

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Solutions

Solution by Encrypto, published 20. jan, 2015; download (408 kb), password: crackmes.de or browse.

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Download Crackme#3_S!x0r.tar.gz, 883 b

Discussion and comments

stanoja 21. Dec 2014	Okay, I've cracked this thing but can't make a keygen. At 004012E0 replace C3 (RET) with 90 (NOP). Still trying to figure out how to bypass the RET without replacing it with NOP but to look for the comparisons. Need help...
Office Jesus 21. Dec 2014	@stanoja: Scroll up to 004012B3 and you will see the first three checks you need to pass. They're pretty easy to figure out. ;)
S!x0r Author 25. Dec 2014	Sorry, in the first version was a bug. Accepted invalid Serials. A thank goes to Office Jesus, who reported me that bug. I hope this version is bug free.
ragdog 26. Dec 2014	Are you sure on your last step with bn2Bytes, do you take care of Endian ? feature or bug? at the end it is not hard. every right solution is wrong in your keygenme due the endian issue.! Greets,
S!x0r Author 26. Dec 2014	Hi ragdog, Yes, I´m sure. I can generate valid serials, with my own keygen for it.
ragdog 26. Dec 2014	I have test it i have the correct serial but you compare it in a wrong endian can you check it please? 00401254 . 8D35 B2454000 LEA ESI, DWORD PTR DS:[4045B2] 0040125A . 8D3D C2454000 LEA EDI, DWORD PTR DS:[4045C2] 00401260 . B9 10000000 MOV ECX, 10 00401265 . 33D2 XOR EDX, EDX 00401267 . 33D2 XOR EDX, EDX 00401269 . EB 0A JMP SHORT Crackme#.00401275 0040126B > 8A06 MOV AL, BYTE PTR DS:[ESI] 0040126D . 3A07 CMP AL, BYTE PTR DS:[EDI] 0040126F . 75 01 JNZ SHORT Crackme#.00401272
S!x0r Author 26. Dec 2014	The check is correct. Can you send me the part where you generate the serial? The surrender from h(m) reaches.
ragdog 26. Dec 2014	Ragdog 9252D23151FC64435B47A631BF1C5A5C-A81ED88B522892B7D897782459EBD556
S!x0r Author 26. Dec 2014	This is Correct!
ragdog 26. Dec 2014	Yes i know but my first thinking was a wrong way. mfg,raggy gRn
downabc 29. Dec 2014	Seriously, Keygen is not hard to code if i know what's the algorithm at 0x402840... it look's like a big int operation, however i can't identify it. Just a overview to this cm: after text of Edit_username and Edit_password was got, the dw_KeyTable at 0x404013 was used to calculate four part of sum of the username in four similar way like: lodsb // get char from username one by one as a loop //do something to al //part2:al ^bx, part4:al+4e, part1:al/16, part3:al+4 add sum,dw_KeyTable[al] then the password was used as 2x128bit big int, seperated by '-' with some endian reverse. after some big int calculation, the four part of the sum will be used as a 128bit big int to be compared with the first 128bit of the 256bit big int to deicde the password is or not corret. and the very last, please forgive me about the poor english...
S!x0r Author 29. Dec 2014	Little tip What's the result for result =AD089BD35F53D4687921D4B4DAF4D4F3^2
boonz 21. Jan 2015	Nicely done, Encrypto. The keygen looks pretty badass. Good to see some of the older folks are still around :-)
Encrypto 23. Jan 2015	Thanks for the kind words boonz :)

S!x0r's Crackme#3 by S!x0r

This is my first Crackme for Linux. I hope it's bug free!
Tested under Ubuntu 14.04.

Have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 26. Oct, 2015
Downloads: 310

Rating

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Solutions

Solution by acruel, published 29. feb, 2016; download (2 kb), password: crackmes.de or browse.

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Solution by mrmacete, published 28. oct, 2015; download (5 kb), password: crackmes.de or browse.

mrmacete has not rated this crackme yet.

Download Crackme#4_S!x0r.tar.gz, 15 kb

Discussion and comments

S!x0r Author 28. Oct 2015	I accept your solution, mrmacete. @all Non bruteforce solutions are more than welcome!
snaiperskaya 16. Feb, 19:34	Hi, are you sure this can be solved? I'm stuck. There's a point like if(passwordlength == 9 && passwordlength == 4)
S!x0r Author 16. Feb, 20:13	The first check password = 9 is the length. The second check isn't the length. Look what stand in eax, before repne scasb is used!
acruel 25. Feb, 07:34	I think this crackme is worth writing a non brute-force solution. I'll try it later ;)
acruel 26. Feb, 12:14	wrote a working keygen much slower than brute-force one. will post it later.
S!x0r Author 06. Mar, 11:48	@acruel! It's not so hard, if you know what it is.

S!x0r's Crackme#4 by S!x0r

Hi everybody!

I've written a new linux crackme. For beginners it's level 3, I think!
Goals are in the readme file.

Some infos:
Crackme is with graphical user interface (QT)
Architecture 64 bit
Not stripped!

Have fun!

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: C/C++

Published: 09. Feb, 2016
Downloads: 316

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by acruel, published 22. feb, 2016; download (2 kb), password: crackmes.de or browse.

acruel has not rated this crackme yet.

Discussion and comments

acruel 18. Feb, 10:28	Is brute-force necessary?
S!x0r Author 18. Feb, 10:59	Hi acruel, brut-force isn't necessary.
acruel 18. Feb, 11:41	@S!x0r That's nice. I'll post a solution later ;)
acruel 20. Feb, 07:02	I'm stuck. Trying to compute a discrete logarithm of a number, which is too big to compute on my MBP. Is there a way to avoid doing it?
S!x0r Author 20. Feb, 08:48	You can use this calculator... http://magma.maths.usyd.edu.au/calc/ It computes the discrete logarithm in seconds. eg. p := 123; K := GF(p); g := K ! 456; y := K ! 789; x := Log(g, y); x; Replace p, g and y with your values in base 10.
acruel 20. Feb, 09:04	Great. It's blazing fast. I tested the same combination of p,g and y on wolfram, but it took forever to compute.
S!x0r Author 20. Feb, 10:05	I've never used wolfram :) Yes, magma is fast.
acruel 20. Feb, 11:56	Just posted a solution. Thanks for your help, S!x0r. acruel E72979218016C452-65331190F912E106
S!x0r Author 20. Feb, 13:28	@acruel Your key works fine. I'll read your solution, then.
S!x0r Author 06. Mar, 11:47	Thanks for your solution, acruel!

Sy1ux's DrawIt! KeyGenMe

Download DrawItKGMe.zip, 422 kb (password: crackmes.de)
Browse contents of DrawItKGMe.zip

Drawing is the key, be creativ.

Goal:

1. Find a valid picturekey
2. Describe the validation algorithm
3. Write a PictureKey

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 24. Aug, 2009
Downloads: 411

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by DarkSpreader, published 03. sep, 2009; download (24 kb), password: crackmes.de or browse.

DarkSpreader has rated this crackme as quite nice.

Discussion and comments

Sy1ux Author 24. Aug 2009	Little mistake. The last and final gold should be: 3. Write a PictureGen For example, you can hook the mouse
Xspider 24. Aug 2009	nice crackme Sy1ux i like the idea :)
xylitol 27. Aug 2009	nice one, waiting solution
Sy1ux Author 05. Sep 2009	Thanks DarkSpreader for solving it :) I hoped more people would be interested in this KeyGenMe...
DarkSpreader 08. Sep 2009	It was quite a pleasure to me to solve it, the idea is interesting ^^ I haven't seen any other keygenme like your one so far :)

Sy1ux's ExploitMe V1

Download ExploitMeV1_by_Sy1ux.zip, 267 kb (password: crackmes.de)
Browse contents of ExploitMeV1_by_Sy1ux.zip

A secret message is hidden in the application.
Find it, and make the application show it.
Doesn't matter how...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 11. May, 2009
Downloads: 444

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by SaintDogbert, published 23. may, 2009; download (317 kb), password: crackmes.de or browse.

SaintDogbert has rated this crackme as quite nice.

Discussion and comments

c0nfig 15. May 2009	Me want hint ))
DigitalAcid 15. May 2009	Doesn't seem to be very hidden or secret =).
c0nfig 16. May 2009	>Doesn't seem to be very hidden or secret but coded :P
Sy1ux Author 17. May 2009	@DigitalAcid Why don't you post a solution if it's that easy ;) ? @c0nfig You've got a message..
obnoxious 19. May 2009	if its the message box that you are talking about then its indeed "not very hidden or secret"
papanyquiL 19. May 2009	^ what he said.
DigitalAcid 19. May 2009	Well, there comes something after the messagebox, something that doesn't show inside the messagebox itself :). The encrypted stuff is not so hard to decode, but i haven't looked any further after i decoded them.
SaintDogbert 20. May 2009	Well, I got the hidden message.. Can someone recommend a tutorial to me for writing a loader? I know what it has to do but I only have a very vague idea of how to go about it..
Sy1ux Author 23. May 2009	If you want, you can also "hardcode" the patch.
DigitalAcid 24. May 2009	Nice tutorial, SaintDogbert :).
indomit 25. May 2009	@SaintDogbert Thank you for solution! Now I know how to write a loader :)
SaintDogbert 25. May 2009	Thanks guys! I've never written a loader before either but once you get the general idea it's pretty easy. Nice crackme, Sy1ux!
skynetuniverse 26. May 2009	Got an other way... just CMP EAX, 01 and no NOP!! :P skynetuniverse
dmcnet 11. Jun 2009	SaintDogbert, gerat tutorial thanks.

Sy1ux's KeyGenMeV2

Download KeyGenMeV2_by_Sy1ux.zip, 80 kb (password: crackmes.de)
Browse contents of KeyGenMeV2_by_Sy1ux.zip

The KeyGenMe will online start with a valid Keyfile.
No patching...

Your goal is to write a keygen.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 11. May, 2009
Downloads: 393

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by ORacLE_nJ, published 01. aug, 2010; download (127 kb), password: crackmes.de or browse.

ORacLE_nJ has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

indomit 12. May 2009	The second key is raising in length every time I press "check". It's a bug?
simonzack Moderator 12. May 2009	first of all, what has this got to do with a keyfile secondly, this crackme has nothing to do with 'online', I presume you intended to spell 'only', sorry, but that was the only reason I wanted to check out this crackme, quite disappointed :( @indomit: I think this is intended, as author said "Can you do it again?" not a level4, level1.
Sy1ux Author 12. May 2009	indomit: No it's not a bug. simonzack: Instead of online I mean "only". Sorry.
the hoax 12. May 2009	I agree with level 1.
Sy1ux Author 14. May 2009	the hoax: Well...difficulty is relativ. The people who "tested" the KGMe said it's harder than other ones. I don't care about difficulty... Reversing is about fun and learning new things...
Gerified 22. May 2009	The music is gross ..
Sy1ux Author 23. May 2009	A lot of complaining, but none of you is able to submit a solution...
LAS3R 24. May 2009	indeed this is a lvl 1 crackme

Sy1ux's Lupo Project KeyGenMe

Download LupoProject.zip, 906 kb (password: crackmes.de)
Browse contents of LupoProject.zip

Packed: No
Wanted: KeyGen or valid key

There are 5 different accesslevel, 1 to 4 aren't that hard, but I think Number 5 needs a little bit more brainfucking ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 20. Jul, 2009
Downloads: 732

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Vallani, published 01. aug, 2009; download (210 kb), password: crackmes.de or browse.

Vallani has rated this crackme as nothing special.

Send a message to symbiont »

View profile of symbiont »

Discussion and comments

br0ken 20. Jul 2009	Solved. Lvl 5 is also easy. Too bad, there is no cake :( And thx for the module, it is umm,...............unique ;) (what language?)
Sy1ux Author 20. Jul 2009	I would be interested in your way of solving lvl 5. Private message would be nice. Everything is coded in Delphi.
br0ken 21. Jul 2009	No, I meant the tracker module/chiptune/keygenmusic/music or what ever its called. Which language is that guy singing in? PMed you with some formulas from my "analysis".
obnoxious 21. Jul 2009	oooh br0ken is not bg it seems :P
Sy1ux Author 24. Jul 2009	Sorry, I don't know which language is it, but I would say it's something from Eastern Europe.

symbiont's crackme1

Download crackme1.zip, 152 kb (password: crackmes.de)
Browse contents of crackme1.zip

This crackme is a testapp for my pe protector beria.
Some time ago I released an early version of beria, but it had
many flaws and I decided to completely rewrite the code.
So this one has nothing (but the name) to do with the old beria.
I tested it successfully on Win2000 SP 4 and Win XP SP 2 but it will
not run on Win 95/98/Me!

rules:
Everthing is allowed!
The crackme is solved when the right text appears in the textbox!

Please give me a lot of feedback for further development!

have fun!

symbiont

Difficulty: 8 - *VERY VERY* hard
Platform: Windows
Language: C/C++

Published: 27. Jun, 2006
Downloads: 1273

Rating

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Solutions

Solution by jE!, published 27. aug, 2006; download (252 kb), password: crackmes.de or browse.

jE! has not rated this crackme yet.

Send a message to synak »

View profile of synak »

Discussion and comments

jE! 26. Jul 2006	hey, I unpuked & etc.. I Just don't know, if algo is reversible, so.. without algo will ok?
X-Treem 26. Jul 2006	in case can u up somewhere solution for unpacking? i'm very interested in that.
jE! 26. Jul 2006	solution will be in solution:) but i'm interesting from author, is algo reversible or no? who can help me? where is deroko?
jE! 26. Jul 2006	sit, Commview decodes my MAC-address as Microsoft:54:00:00 bad? Commview or failure??
symbiont Author 27. Jul 2006	You are right, the only way to solve the algo is to brute force it. I wasn't completely sure of it, when i released it. If I am right, your unpacked one should not work fully (without a key), so what do you think of the protection?
jE! 29. Jul 2006	i reCREATorred those peace of code:))) >>Everthing is allowed! i will take time to write solve..
symbiont Author 30. Jul 2006	Well, of course, take your time and write a good solution!
SpiderZ 04. Nov 2009	not opening in Windows7 i also set the compatibility windows xp..
andrewl.us Moderator 04. Nov 2009	So what SpiderZ? What do you want us to do? 3 year old solved crackme that doesn't work on your OS that wasn't invented at the time. What action do you expect from your message?

synak's SerialMe_v1 (Includes Source)

Download SerialMe_v1.zip, 13 kb (password: crackmes.de)
Browse contents of SerialMe_v1.zip

This was created in hopes to show new reversers (myself included) some examples of simple obfuscation, among other easy tricks, in a minimal amount of code to hash through.

Rules: No patching, find a valid serial. No brute force is required, no hard math, its simple.

The source code is included, and the password for the source.zip will be shown when you enter a valid serial.

I hope you enjoy.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 16. Mar, 2008
Downloads: 665

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by apuromafo, published 21. mar, 2008; download (15 kb), password: crackmes.de or browse.

apuromafo has rated this crackme as quite nice.

Solution by br0ken, published 21. mar, 2008; download (2 kb), password: crackmes.de or browse.

br0ken has rated this crackme as awesome.

Solution by DigitalAcid, published 21. mar, 2008; download (3 kb), password: crackmes.de or browse.

DigitalAcid has rated this crackme as nothing special.

Send a message to synamics »

View profile of synamics »

Discussion and comments

DigitalAcid 16. Mar 2008	Like you said: simple obfuscation, easy tricks :). Nice crackme, uploaded tutorial.
Ox87k 16. Mar 2008	Obfuscation? Where?!? XD To solve this one you can skip the whole obfuscated code, just pay attention near the good messagebox and nothing more
synak Author 17. Mar 2008	OK, perhaps I should have said extremely simple obfuscation. :-) Was just an example of using junk bytes and an indirect jmp to trick the debugger. I think it can see odd to a new reverser -- I know it seemed odd to me!
br0ken 18. Mar 2008	Nice cme, thanks!
apuromafo 19. Mar 2008	Nice cme, thanks!, now go my tut~for see the source jiji
apuromafo 19. Mar 2008	Your solution to this crackme is being reviewed by moderators.~
DigitalAcid 19. Mar 2008	Mine is in queue for 3 days now =).
apuromafo 20. Mar 2008	well wait a little~
TiGa 21. Mar 2008	We always wait a few days to allow more persons to submit their solutions so they are all approved at the same time. It has never been a race either.
apuromafo 21. Mar 2008	sorry for my english~im newbie in that~
E1xis 25. Mar 2008	Niiice! I thought this one would be a piece of cake but took me a day to fully understand what your code makes :D I found it pretty awesome - although I'm a noob yet ;]

synamics's Xrockmr

Download rockmr.zip, 6 kb (password: crackmes.de)
Browse contents of rockmr.zip

My first crackme, It's very easy.
It's no return anything, it decodes de password and put it back on the variable.

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 19. Sep, 2012
Downloads: 1353

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by laqqah, published 02. oct, 2012; download (1 kb), password: crackmes.de or browse.

laqqah has not rated this crackme yet.

Solution by whizz, published 02. oct, 2012; download (74 kb), password: crackmes.de or browse.

whizz has rated this crackme as nothing special.

Solution by syspher, published 02. oct, 2012; download (1 kb), password: crackmes.de or browse.

syspher has not rated this crackme yet.

Solution by Qnix, published 02. oct, 2012; download (1 kb), password: crackmes.de or browse.

Qnix has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

synamics Author 23. Sep 2012	This is very easy people, come on!
r2s2 27. Sep 2012	Easy - the right thing for me. But: I can't find a tool like ollydbg on linux. gdb, ddd and edb don't seem to work. Do you have a little clue for that?
whizz 29. Sep 2012	Nice crackme there, submitted a simple tutorial.
laqqah 29. Sep 2012	r2s2: try to get your hands on "ida pro" for linux. or there is a free tool called "HT Editor" which is also quite powerful. Pretty tame compared to IDA pro but still I prefer it in many ways (more stable etc). Use HTE together with scripting for GDB and you're set for life :)
laqqah 29. Sep 2012	r2s2: Also, a hint, there were some anti-debug techniques used in this crackme. Might be why you can't use GDB right away...
syspher 29. Sep 2012	Very easy crackme.. Use IDAPro to get the password and test the crackme in Linux/Unix I submitted my solution a few days ago..
r2s2 04. Oct 2012	Hi laqqh, thanks for the hints. I'll give it another try.
acez 07. Oct 2012	Hahah I just downloaded the crackme. I ran the program to test it and the first password I tried was the key :D. I couldn't believe it hahah
codeinject 09. Oct 2012	The IDA Pro Evaluation worked fine for this task. Quite easy although quite fun.
ejohn 16. Oct 2012	I am a complete beginner to reverse engineering and this was not easy for me! But I have to say I had a lot of fun trying to solve this. Thank you!
synamics Author 10. Nov 2012	Yeah man you rock!
heraton 27. Dec 2012	Thanks for the crackme. Because gdb was my debugger of choice this crackme was maybe a little bit more difficult than "very easy"...
cyber111970 31. Dec 2012	Hello: I've never done this before; it took me about three hours to get the password. I still don't understand why GDB acted the way it did. Anti-debug techniques? --cyber111970
tecknickel 08. Jan 2013	Very very simple.
Noteworthy 13. Mar 2013	Cracking done ! was easy as A, B, C.
cracker00ff 07. Apr 2013	Four verifications? Why? Four patchings are not harder than one patching... The hardest thing in this one is to find necessary function, i used "search for strings" option in disassembler.
croulder 07. Apr 2014	very easy crackme. Ideal for begginers

Solution by KoDeR, published 07. may, 2008; download (2 kb), password: crackmes.de or browse.

KoDeR has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

DigitalAcid 30. Apr 2008	Heh, i was thinking about making something similar like that :). PS: does the string need to be shown in the title ? (wich is pretty easy, only 1 byte). or in the box itself ?
Ox87k 30. Apr 2008	Eheh, easy man but really funny :) Try to improve it with something else..
sYnfo Author 30. Apr 2008	DigitalAcid: It is supposed to be shown in the box, but changing the caption is indeed a nice bonus goal... ;) Ox87k: Thanks, I´ll certainly try, but I´m still new to ASM so it might take a while... :)
HackerVirus_90 03. May 2008	Well d0ne! show in the caption and the inside of MessageBox? Sorry but i speak little english :)
sYnfo Author 03. May 2008	HackerVirus_90: Inside the MessageBox is just enought... :) And don´t worry, I´m no great english speaker either... ;)
freesoul 03. May 2008	hehe it's a funny name pushpushme :D I sent a solution
sYnfo Author 04. May 2008	freesoul: Yayks, thanks! I didn´t expect that someone would make a solution for such small CrackMe, I appreciate that... :)
HackerVirus_90 04. May 2008	I sent a text solution, sYnfo has see that?
sYnfo Author 04. May 2008	HackerVirus_90: No, I haven´t! I´m new around here, but I think one of the Moderators (By the way, thanks for approving my CrackMe TiGa ;) will have to approve it first, before I or anyone else can have a look...
-Lord Virus- 07. May 2008	Is there any solution for this?.
Sinok 08. May 2008	Very fun crackme :) Maybe I'll post a video solution :D
sYnfo Author 08. May 2008	Sinok: It would be great! I´m looking forward to it... ;)
Sinok 08. May 2008	I submitted it about 5 hours ago, it was rejected, 30 mins after that I resubmitted it. It'll probably be approved this time ;P
sYnfo Author 11. May 2008	Sinok: Great video, although quite straightforward way of solving... ;)
Sinok 13. May 2008	Had something else in mind, nevermind tho :\
Rezert 14. May 2008	Okay, so I suck...in the solutions everyone says they can see it's 40300B...and of course when I say push 40300B it says ASCII "well d0ne!", so when I looked at the hex though, all I see is 00403080 and 00403090...I'm a total n00b and can't figure out where you see the 40300B...please help me...
Rezert 16. May 2008	Crap...I've been trying to figure it out and I still don't get it...please help me.
sYnfo Author 16. May 2008	Rezert: I'm afraid I don't get you, what exactly don't you understand?
Rezert 16. May 2008	well, all the tuts say "So now we know it's 40300B" (from the hex), well when i look at the hex and then look to where the hex is showing i dont see 40300B, infact, i only see the hex 403080 and 403090 where the well and d0ne! are...
DigitalAcid 16. May 2008	Well, hex is like this: 0 1 2 3 4 5 6 7 8 9 A B C D E F The "Well done" starts at 40300B, but the hex you see is probably 403000, right ? If you're talking about the dump, just count or use Ctrl+G to go to that address. Same in Disassembly.
Rezert 16. May 2008	ohh...i think i understand. lmao, thanks.
Rezert 16. May 2008	k, so i see how it starts on B, but how does it end at the ! ? is it because of the ........?
sYnfo Author 16. May 2008	Rezert: It´s a string, ergo terminated by null ("00") byte... And yes, null bytes are shown as "." in Olly... :)
Rezert 16. May 2008	ahhh, i see. i totally understand now, thx sooo muh
sYnfo Author 17. May 2008	Rezert: Aye, happy to help... ;)

Synok's 17 Byte Baby - Synok

Download 17b_CrackMe_Synok.zip, 770 b (password: crackmes.de)
Browse contents of 17b_CrackMe_Synok.zip

Simple PatchMe By Synok.

What? - Patch the CrackMe.
How? - No strings only to reduce size. If crash, try again.
Goal? - Patch it so it wont crash.
Size? - 17 bytes only and it's NOT Packed.
Encr? - WONT work with Olly. Need W32Dasm, and a hex editor. ;)
Hard? - Because of the debuggable disfunctions, and hex editing
I would say this is for the cracker who wants a
challenge, but it still can be done with just some
bytechanges.

Have fun :)

- Synok -

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: Assembler

Published: 10. Jan, 2009
Downloads: 359

Rating

Votes: 4
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by br0ken, published 24. jan, 2009; download (2200 kb), password: crackmes.de or browse.

br0ken has not rated this crackme yet.

Discussion and comments

DigitalAcid 10. Jan 2009	So, you want us to open it and then it needs to stay open ? I don't really understand what our goal is...
andrewl.us Moderator 10. Jan 2009	"Goal? - Patch it so it wont crash." Doesn't crash on this machine (Vista).
xylitol 10. Jan 2009	crash on my vista
andrewl.us Moderator 11. Jan 2009	Doesn't crash on my XP machine either. Running under debugger catches nothing funny, it seems. ModLoad: 76b40000 76b6d000 C:\WINDOWS\system32\WINMM.DLL ModLoad: 5f160000 5f167000 C:\WINDOWS\system32\NTVDMD.DLL Loading [C:\WINDOWS\system32\ntio.sys] ModLoad: 769c0000 76a73000 C:\WINDOWS\system32\Userenv.dll ModLoad: 77c10000 77c68000 C:\WINDOWS\system32\msvcrt.dll Loading [C:\WINDOWS\SYSTEM32\HIMEM.SYS] Loading [C:\WINDOWS\SYSTEM32\COMMAND.COM] ModLoad: 769c0000 76a73000 C:\WINDOWS\system32\Userenv.dll ModLoad: 77c10000 77c68000 C:\WINDOWS\system32\msvcrt.dll ModLoad: 769c0000 76a73000 C:\WINDOWS\system32\Userenv.dll ModLoad: 77c10000 77c68000 C:\WINDOWS\system32\msvcrt.dll ModLoad: 769c0000 76a73000 C:\WINDOWS\system32\Userenv.dll ModLoad: 77c10000 77c68000 C:\WINDOWS\system32\msvcrt.dll Loading [C:\WINDOWS\system32\MSCDEXNT.EXE] Loading [C:\WINDOWS\system32\REDIR.EXE] Loading [C:\WINDOWS\system32\DOSX.EXE] Loading [C:\DOCUME~1\NAME\DESKTOP\17BYTE\17BYTE~1.EXE] Freeing [C:\DOCUME~1\NAME\DESKTOP\17BYTE\17BYTE~1.EXE]
Haykuro 11. Jan 2009	solved :) solution submitted, its a very interesting crackme :)
Synok Author 11. Jan 2009	Yeah the purpose was kinda hard to explain but when you open the CrackMe up, it closes down again. Your goal: Patch it so it Wont close down. :) Simple stuff.
simonzack Moderator 13. Jan 2009	you mean infinite loop?
DigitalAcid 14. Jan 2009	Yep. There is not really another way to let it stay open ;).
Synok Author 14. Jan 2009	Yes.. Just patch it to it's infinite loop..

Synok's 30 Byte Brother

Download 30b_CrackMe_Synok.zip, 678 b (password: crackmes.de)
Browse contents of 30b_CrackMe_Synok.zip

30 Byte Brother - Synok

This time I added some bytes to the CrackMe, tighting the belt
and making it harder. If you didn't guess on the previous
Crackme, you might have an angel with you this time.
A little harder, but not too much.

Code in ASM.
Size is 30 Bytes as said above.

Have fun guys,

- Synok -

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: Assembler

Published: 15. Jan, 2009
Downloads: 289

Rating

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(we have only 1).

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Solutions

Solution by VinzenZ, published 30. jan, 2009; download (1 kb), password: crackmes.de or browse.

VinzenZ has not rated this crackme yet.

Discussion and comments

Synok's - CrackMe.Hard - By Synok

Download CrackMe_Hard_By_Synok.zip, 4 kb (password: crackmes.de)
Browse contents of CrackMe_Hard_By_Synok.zip

This is a harder CrackMe..
I hope your a good cracker to solve this..

No protection!

Rules :
'Â¨'Â¨'Â¨'
1 . Don't patch it the way it looks like it is cracked but isnt.
2 . Dont use any tool for stealing the work ;)
3 . Have fun cracking it!! :)

Adios,

---

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 18. Oct, 2006
Downloads: 488

Rating

Votes: 3
Crackme is quite bad.

Rate this crackme:

Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

Synok's CrackMe 2 in 1

Download CrackMe2in1.zip, 14 kb (password: crackmes.de)
Browse contents of CrackMe2in1.zip

From the ReadMe:

"
CrackMe2in1 - Synok
-------------------
This is a patch n keyme in 1. Patch it first, then find the key.
A valid license file is required.

Worthless info:
Code in C++
Released on 2013-09-22
Not packed

----------
Enjoy - Synok@2013"

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 24. Sep, 2013
Downloads: 419

Rating

Votes: 4
Crackme is boring.

Rate this crackme:

Solutions

Solution by 0gravity1, published 09. oct, 2013; download (21 kb), password: crackmes.de or browse.

0gravity1 has rated this crackme as quite nice.

Solution by Ruev, published 06. oct, 2013; download (27 kb), password: crackmes.de or browse.

Ruev has rated this crackme as boring.

Discussion and comments

Ruev 25. Sep 2013	Nice work, solution submitted with keygen.
0gravity1 27. Sep 2013	I had a lot of fun with this one...I am a noob and it was the first keygen I was able to do by myself!
Irrenhaus 05. Oct 2013	I've patched the .exe but if i insert a wrong name it says that the license isnot valid and shows me the license for the name..
Synok Author 07. Oct 2013	@Irrenhaus Oops, I am sorry. While coding this I printed out the algorithm used for the CrackMe. Must have forgotten to remove it before releasing it.
c0R3 13. Oct 2013	easy :) it should be lvl 1
Newbie123 22. Nov 2013	Yes it should be lvl 1 but it's very nice. I like it.
Akena 08. Dec 2013	Nice Crackme for beginner :)
mausy131 09. Dec 2013	Quite strange that it prints the right serial for you... Just place it in the .dat file and you're done

Synok's Crackme by Synok

Download Crackme.zip, 127 kb (password: crackmes.de)
Browse contents of Crackme.zip

Fast crackme written in C++

464KB
NOT packed
Contains worthless readme

Happy engineering!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 14. May, 2010
Downloads: 730

Rating

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(we have only 2).

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Solutions

Solution by xylitol, published 19. may, 2010; download (385 kb), password: crackmes.de or browse.

xylitol has not rated this crackme yet.

Discussion and comments

dacorp8007 17. May 2010	what about patching? is it legal?
Xspider 19. May 2010	where are the rulZ i think it should be patched?!
synak 19. May 2010	just nop the call that inserts 'Not' in front of 'Cracked'? Is that what this challenge was...?
Xspider 20. May 2010	nice solution xyl :D

Synok's KeyGenMe #1 - Synok

Download Synoks_CrackMe_#1.zip, 214 kb (password: crackmes.de)
Browse contents of Synoks_CrackMe_#1.zip

Simple KeygenMe by Synok.

Rules:
1. Find algo.
2. Make Keygen.
3. NO Patching allowed.

Have fun. :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 23. Dec, 2008
Downloads: 1522

Rating

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(we have only 1).

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Solutions

Solution by xylitol, published 01. jan, 2009; download (3970 kb), password: crackmes.de or browse.

xylitol has not rated this crackme yet.

Solution by Haykuro, published 01. jan, 2009; download (161 kb), password: crackmes.de or browse.

Haykuro has not rated this crackme yet.

Solution by yudi, published 01. jan, 2009; download (718 kb), password: crackmes.de or browse.

yudi has not rated this crackme yet.

The submission of solutions is closed.

Discussion and comments

shellwolf 30. Dec 2008	it seems this is a simple crackme.but what is secret place? and why printf "" for several times?
Synok Author 30. Dec 2008	First thing, printf is used to call the variable called when you try to search for textstrings for good or badboys. If I tell you more, I would reveal or spoil parts of the CrackMe. Good luck.
ByTESCRK 31. Dec 2008	Only need to try ... RegCode = (Len(Reg name)2)2) to generate a valid RegCode number ;)
shellwolf 01. Jan 2009	To get a vaild regcode is easy,but it seems have several bugs or it is a trick?.if(1==2) .....printf("%s",ebp-11)? could u paste ur souce code here..
Twiz9491 11. Jan 2009	lol for every digit in the reg name add 4 and theres ur reg code. ex john would be 16 since theres 4 digits 4x4 = 16 :)
brockcooper1 12. Jan 2009	Good crackme :) i like it.... but maybe that's because I'm a noob

Synok's KeyGenMe #2 - Synok

Download Synoks_CrackMe_#2.zip, 218 kb (password: crackmes.de)
Browse contents of Synoks_CrackMe_#2.zip

Another KeyGenMe by Synok.

Rules.
1. Find Algo.
2. Make KeyGen.
3. NO Patching.

NOTE: This CrackMe includes a KeyGen aswell as my previous
CrackMe, if you don't succeed to crack it.

Have fun. :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 23. Dec, 2008
Downloads: 603

Rating

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(we have only 1).

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Solutions

Solution by xylitol, published 01. jan, 2009; download (94 kb), password: crackmes.de or browse.

xylitol has not rated this crackme yet.

Discussion and comments

ByTESCRK 31. Dec 2008	Only need ... RegCode = ((Len(regname)*120000)+Len(regname)) to generate a valid Code ---[TSRh TeaM]---
Coderess 15. Jan 2009	It's too very simple

Synok's Synok's CrackMe 1#

Download CrackMe1_by_Synok.zip, 3 kb (password: crackmes.de)
Browse contents of CrackMe1_by_Synok.zip

There is just one simple rule in this CrackMe:

No Patching.. :P

Have fun! :D

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 11. Jul, 2006
Downloads: 720

Rating

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(we have only 2).

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Solutions

Solution by Anasazi, published 12. nov, 2006; download (4 kb), password: crackmes.de or browse.

Anasazi has rated this crackme as boring crap.

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Discussion and comments

Anasazi 05. Nov 2006	Greetz to Synok for this very good CrackME for Newbies, it's very suitable. Hope to see more ;)
T.0.R.N.A.D.0. 09. Mar 2009	Anasazi's solution is INCORRECT. The author says : "No Patching.. :P"
Anasazi 16. Feb 2010	Good luck cracking it in another way, you can't.
Xspider 16. Feb 2010	i think it can be cracked in another way ;) loader for example that will not be considered as a patching :D

T.0.R.N.A.D.0.'s CrackMe #1

Download T.0.R.N.A.D.0.__s_CrackMe_#1.zip, 9 kb (password: crackmes.de)
Browse contents of T.0.R.N.A.D.0.__s_CrackMe_#1.zip

>>>> READ-ME FOR T.0.R.N.A.D.0.'s CrackMe #1
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PLATFORM :: WINDOWS
LANGUAGE :: ANSI C++
DIFFICULTY :: 1 [ Very Easy, for newbies ]

The Rules:
==========---
** Universal ** : (*) NO BRUTE-FORCING
(*) NO PATCHING

The Tasks:
==========---
1. Simply enter a secret code that would pass ALL the tests.
2. Reverse the complete algorithm for checking the code.
3. Write a descent tutorial.

IMPORTANT :: Explain in your solution, how you found "the" secret code that would
pass Test #3. Tests #1, #2 are easy enough. NO BRUTE-FORCING.
Pure Mathematics :)
The secret code is interesting enough, although very small.

~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~

printf("T.0.R.N.A.D.0. - born 2 %X\n",49374);

_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 16. Apr, 2009
Downloads: 1181

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by DoomsDay, published 20. apr, 2009; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

T.0.R.N.A.D.0. Author 16. Apr 2009	Very easy, for newbies ! :)
T.0.R.N.A.D.0. Author 19. Apr 2009	IMPORTANT ::: I forgot 2 mention : THERE ARE '2' VALID SECRET CODES. FIND BOTH OF THEM AND THEN POST YOUR SOLUTION. YOUR SOLUTION SHOULD EXPLAIN HOW YOU FOUND THOSE CODES WITHOUT BRUTE-FORCE.
T.0.R.N.A.D.0. Author 20. Apr 2009	@ DoomsDay : INCORRECT ANALYSIS !!!! Test #2 does NOT ONLY accept integers which are made of "8"s. Please think again. Try to enter 8118 and see that it passes Test #2. FURTHER, -8 cannot be accepted. There exist ONLY ONE MORE acceptable POSITIVE SOLUTION except 8. Try to find it :)
T.0.R.N.A.D.0. Author 20. Apr 2009	Even 6119 passes Test #2, it has NO "8"s AT ALL !!!! Please update your solution DoomsDay and thanx for trying. :)
andrewl.us Moderator 20. Apr 2009	I tested 8 and -8 and they were (and are) both accepted by the crackme. The original requirement was "Simply enter a secret code that would pass ALL the tests." which DoomsDay found: 8. Your comment at a later date indicated the existence of a second number that would pass all test. DoomsDay's tutorial named a second number: -8. While his analysis may not be perfect, the results of the analysis do indeed satisfy the crackme requirement. It is my opinion that the cracker can and should try any shortcut/exploit/attack allowed. If the crackme author wishes to constrain the cracker's behavior to his expectations, this should be reflected in precise crackme code and description.
T.0.R.N.A.D.0. Author 20. Apr 2009	OK. Gonna upload Ver.2.0 :) "While his analysis may not be perfect, the results of the analysis do indeed satisfy the crackme requirement." What's important is the ANALYSIS i guess, and NOT the result.

T.0.R.N.A.D.0.'s CrackMe #1 Ver.2.00

Download T.0.R.N.A.D.0.__s_CrackMe_#1_Ver.2.00.zip, 9 kb (password: crackmes.de)
Browse contents of T.0.R.N.A.D.0.__s_CrackMe_#1_Ver.2.00.zip

>>>> READ-ME FOR T.0.R.N.A.D.0.'s CrackMe #1 Ver.2.00
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PLATFORM :: WINDOWS
LANGUAGE :: ANSI C++
DIFFICULTY :: 2 [ Needs a little brain (or luck) ]

The Rules:
==========---
** Universal ** : NO BRUTE-FORCING and NO PATCHING

The Tasks:
==========---
1. (a) Find THE secret code that would pass PHASE 1 Security Check.
(b) Find THE secret code that would pass PHASE 2 Security Check.
2. Reverse the complete algorithm for checking the code for both phases.
3. Write a descent tutorial.

~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~
printf("T.0.R.N.A.D.0. - born 2 %X\n",49374);
_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 21. Apr, 2009
Downloads: 470

Rating

Votes: 3
Crackme is boring.

Rate this crackme:

Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

T.0.R.N.A.D.0. Author 21. Apr 2009	This one is harder than Ver.1.00. ;) And, I think this time there is no flaw in the code :)
c0nfig 26. Apr 2009	Me tryed) Not for my newbie knowledges)
DoomsDay 26. Apr 2009	I'll see what I can do :)
Skid Vicious 27. Apr 2009	i figured out the valid serials for task 1 what exactly is ment by "reverse the complete algorithm for checking the code for both phases" in task 2? isn't that part of the work in task 1?
T.0.R.N.A.D.0. Author 27. Apr 2009	@ Skid Vicious : Sorry, I don't understand you. PHASES 1 and 2 are different and independent. You enter phase 2 after passing phase 1. And serial for phase 2 is different from phase 1. And, are you sure you figured out "serials" (more than 1 !) ??
Skid Vicious 27. Apr 2009	ok sorry if i didn't make myself clear again: i passed phase 1 and 2 by finding the two valid serials (so much for task 1) but what exactly needs to be done in TASK 2 (not PHASE 2...) cheers!
T.0.R.N.A.D.0. Author 28. Apr 2009	In Task 2, well... nothing special if you have passed task 1 ;) I just wanted to inform people that they should include the algorithm of the checks, in their solutions. :) Write a tut and submit soon :)
T.0.R.N.A.D.0. Author 04. May 2009	Thanx mods for removing the solution. < 3 Comments removed 'cuz they were spoilers >
blackspark 01. Jul 2009	awesome one dude! n yeah!i did it!! ...thanks.....
hound 30. Jul 2009	Solved it. Was pretty nice. I will upload a solution soon
T.0.R.N.A.D.0. Author 01. Mar 2010	No solutions yet .. neither blackspark's nor hound's !!

T.0.R.N.A.D.0.'s KeyGenMe #1

Download T.0.R.N.A.D.0.__s_KeygenMe_#1.zip, 15 kb (password: crackmes.de)
Browse contents of T.0.R.N.A.D.0.__s_KeygenMe_#1.zip

>>>> T.0.R.N.A.D.0.'s KeyGenMe #1
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PLATFORM :: WINDOWS

LANGUAGE :: VB 6.0 [ No protection ]

DIFFICULTY :: 3 [ Getting Harder ]

------------------==============-------------

SUBMITTED BY :: T.0.R.N.A.D.0.

------------------==============-------------

The Rules:
==========---

(*) NO PATCHING

(*) NO BRUTE-FORCING

The Tasks:
==========---

1. Find algorithm for key and color calculations.

2. Make keygen to generate key and color code for a given user-name.
[ The program accepts a particular color out of 9 colors for each user.
The 9 colors are : RED, GREEN, BLUE, YELLOW, CYAN, MAGENTA, BLACK, WHITE, GREY.
So, either your keygen can show the color or it can just name it.
Particularly for C/C++ programmers, you can just display the color name. ]

3. Write a tutorial. ;)

~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~

printf("T.0.R.N.A.D.0. - born 2 %X\n",49374);

_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 19. Mar, 2009
Downloads: 403

Rating

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(we have only 1).

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

T.0.R.N.A.D.0. Author 22. Mar 2009	Any one trying it ?? Dead6re is probably the first one to solve it. [ He PMed me the correct key and color-code for his name ]
Dead6re 22. Mar 2009	Okay, I've solved the problem at last, just waiting for it to be approved, my keygen is written in vb.net so you can use a .net reflector to view if once and if my submission becomes approved.
T.0.R.N.A.D.0. Author 22. Mar 2009	OK. I hope it contains a tutorial too.
Dead6re 22. Mar 2009	It does, interesting algorithm, my first attempt to solve one as well.
T.0.R.N.A.D.0. Author 22. Mar 2009	Glad 2 know that U liked it.
T.0.R.N.A.D.0. Author 22. Mar 2009	Hope U would also like my KeyGen #2. It's a bit harder than this one, and is in C++. :) Just submitted it and awaiting approval.
T.0.R.N.A.D.0. Author 24. Mar 2009	@ Dead6re Where is your solution, did it get approved ?
T.0.R.N.A.D.0. Author 11. Apr 2009	This was my first KGM. Yet unsolved !! Anyone solving it ?? Please upload a tut.
asterix 31. Dec 2012	Name: asterix Serial: SN-2194323012322202322812102240 Color: Red
zairon Moderator 01. Jan 2013	Why don't you write a solution instead of spoiling a valid serial?

T.0.R.N.A.D.0.'s KeyGenMe #2

Download T.0.R.N.A.D.0.__s_KeygenMe_#2.zip, 8 kb (password: crackmes.de)
Browse contents of T.0.R.N.A.D.0.__s_KeygenMe_#2.zip

>>>> READ-ME FOR T.0.R.N.A.D.0.'s KeyGenMe #1
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PLATFORM :: WINDOWS

LANGUAGE :: C / C++ [ No protection ]

DIFFICULTY :: 3 [ Getting Harder ]

------------------==============-------------

SUBMITTED BY :: T.0.R.N.A.D.0.

------------------==============-------------

The Rules:
==========---

(*) NO PATCHING

(*) NO BRUTE-FORCING

The Tasks:
==========---

1. Find the algorithm.

2. Make keygen to generate RefID and Key.

3. Write a tutorial. ;)

Hints:
==========---

1. The serial can consists of the entire array of visible chracters, but
only 4 different characters would also be enough.

2. THE 4 different characters are ( 2 * Alphabets ) + ( 2 * Numbers )

3. ANY set of 4 different [ even though they too may be ( 2 * Alphabets )
+ ( 2 * Numbers ) ] characters won't work.
There exists ONLY 1 such set.

4. Most important HINT : Idea of this is inspired by bRaInF**k.

~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~

printf("T.0.R.N.A.D.0. - born 2 %X\n",49374);

_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 23. Mar, 2009
Downloads: 392

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by obnoxious, published 26. mar, 2009; download (10 kb), password: crackmes.de or browse.

obnoxious has rated this crackme as boring.

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Discussion and comments

T.0.R.N.A.D.0. Author 24. Mar 2009	This should not be very difficult. Somebody post a solution soon.
obnoxious 25. Mar 2009	2 alphabets n 1 number set is enough the other number is redundant
T.0.R.N.A.D.0. Author 25. Mar 2009	Even Lesser ! ONLY 1 Alphabet + 1 Number Set is enough too. But, I was trying to imitate BF, so just added 1 more alphabet and 1 more number. They do the reverse function of the 1 Alphabet + 1 Number in the minimal set.
T.0.R.N.A.D.0. Author 25. Mar 2009	@ obnoxious If you have solved this, please post a solution. And, in my last comment, I don't consider the 'X' alphabet in the suffix '-X' of the valid keys. Because, '-X' doesn't have any other function than to mark the termination of the key.
obnoxious 26. Mar 2009	yeah 1 alphabet n 1 number sd do. i too ddnt consider the X char. though i used both the alpohabets to make a better looking keygen.
obnoxious 26. Mar 2009	(A & B) & 1
T.0.R.N.A.D.0. Author 26. Mar 2009	A, B, 0, 1 <-- The complete set that the program works with A, 1 <-- Minimal set
T.0.R.N.A.D.0. Author 27. Mar 2009	@ obnoxious Thanx for the nice tut.
obnoxious 28. Mar 2009	dont mention it :)
T.0.R.N.A.D.0. Author 29. Mar 2009	@ obnoxious You CAN paste inside console window like this : Right-Click the Title bar of the window > Edit > Paste ;)
obnoxious 29. Mar 2009	oops i ddnt kno that thanks. BTW where r u from?
T.0.R.N.A.D.0. Author 29. Mar 2009	<< INDIA >>

T.0.R.N.A.D.0.'s KeyGenMe #2 Ver.2.00

Download T.0.R.N.A.D.0.__s_KeygenMe_#2_Ver.2.00.zip, 8 kb (password: crackmes.de)
Browse contents of T.0.R.N.A.D.0.__s_KeygenMe_#2_Ver.2.00.zip

>>>> READ-ME FOR T.0.R.N.A.D.0.'s KeyGenMe #2 Ver.2.00
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PLATFORM :: WINDOWS
LANGUAGE :: C/C++ [ No protection ]
DIFFICULTY :: 3 [ Getting harder ]

The Rules:
==========---
(*) NO PATCHING.
(*) NO BRUTE-FORCE.
Simply make a Keygen.

The Tasks:
==========---
1. Find a correct combination of RefID and License-Key.
2. Find the algorithm for Key and RefID calculations
3. Make a KEYGEN.
4. Write a descent tutorial. ;)

THANX TO :: cyclops, obnoxious, andrewl.us and all other friends @ crackmes.de. :D

~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~
printf("T.0.R.N.A.D.0. - born 2 %X\n",49374);
_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 02. Apr, 2009
Downloads: 465

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by obnoxious, published 07. apr, 2009; download (15 kb), password: crackmes.de or browse.

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Discussion and comments

T.0.R.N.A.D.0. Author 02. Apr 2009	I guess, this one would N0T b b0rInG !
obnoxious 06. Apr 2009	nice one!!!!!!!!!!!!!!!!!!!!!! hehehehe
T.0.R.N.A.D.0. Author 08. Apr 2009	Thanx for the solution bro :)
obnoxious 08. Apr 2009	no probs bro :) hopefully we'll chat sm time soon.....

T.0.R.N.A.D.0.'s KeyGenMe #3

Download T.0.R.N.A.D.0.__s_KeygenMe_#3.zip, 18 kb (password: crackmes.de)
Browse contents of T.0.R.N.A.D.0.__s_KeygenMe_#3.zip

>>>> READ-ME FOR T.0.R.N.A.D.0.'s KeyGenMe #3
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PLATFORM :: WINDOWS
LANGUAGE :: VB [ No protection ]
DIFFICULTY :: 3 [ Getting harder ]

The Rules:
==========---
** Universal ** : (*) NO BRUTE-FORCING
Test #1,#2,#3 : (*) NO RULES ! You may patch !!
Test #4 : (*) NO PATCHING NOW! Simply make a Keygen. [[ This won't be difficult ]]

The Tasks:
==========---
1. TASK #1 :: Defeat the Anti-Debugger.

2. TASK #2 :: Patch the app to run instead of closing.

3. TASK #3 :: Find your way to the Validation Section.
[[ HINT :: The form appears BLANK at this test. Make it look better ;) ]]

3. TASK #4 :: Enter correct validation details and pass the validation check.

4. Write a descent tutorial. ;)

~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_
printf("T.0.R.N.A.D.0. - born 2 %X\n",49374);
_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 26. Mar, 2009
Downloads: 488

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by deurus, published 16. jul, 2010; download (967 kb), password: crackmes.de or browse.

deurus has rated this crackme as nothing special.

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Discussion and comments

T.0.R.N.A.D.0. Author 26. Mar 2009	Try this one now ! ;)
T.0.R.N.A.D.0. Author 11. Apr 2009	Hmmmmm... 83 downloads, no solution yet !
obnoxious 11. Apr 2009	bro i dont do VB crackmes else :)................
deurus 17. Jul 2010	Good crackme T.0.R.N.A.D.0.!!!! I enjoy with this
T.0.R.N.A.D.0. Author 31. Mar 2013	Nice solution deurus! :)

T.0.R.N.A.D.0.'s KeyGenMe #4

Download T.0.R.N.A.D.0.__s_KeygenMe_#4.zip, 8 kb (password: crackmes.de)
Browse contents of T.0.R.N.A.D.0.__s_KeygenMe_#4.zip

>>>> READ-ME FOR T.0.R.N.A.D.0.'s KeyGenMe #4
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PLATFORM :: WINDOWS
LANGUAGE :: C / C++
DIFFICULTY :: 4 [ Needs Special Knowledge ]

The Rules:
==========---
(*) NO PATCHING
(*) NO BRUTE-FORCING

The Tasks:
==========---
1. Try to get Status as "VALID :) !".
2. Find the algorithm for the computations involved.
3. Make keygen to VALID Key for ANY name. Please note that VALID KEYS EXIST FOR ALL NAMES.
4. Write a descent tutorial. ;)

Hint:
==========---
Think about solving a 15-puzzle. ;)

~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~
printf("T.0.R.N.A.D.0. - born 2 %X\n",49374);
_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 23. Apr, 2009
Downloads: 361

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

T.0.R.N.A.D.0. Author 24. Apr 2009	Hope you would like this one ! PLEASE INCLUDE COMPLETE SOURCE CODE OF YOUR KEYGEN WITH YOUR SOLUTION.
T.0.R.N.A.D.0. Author 28. Apr 2009	Any progress with this one ???
cobrasniper555 16. Jun 2009	Just solved a crackme, so I am quite inspired for a harder one. Wish me luck! :)
cobrasniper555 16. Jun 2009	Oh man...I don't know what to do. Hahaha
hound 31. Jul 2009	This is very nice!
hound 01. Aug 2009	Solved. Will upload a tutorial soon. Very very very cool crackme. Thoroughly enjoyed it.

T.0.R.N.A.D.0.'s KeyGenMe #5

Download T.0.R.N.A.D.0.__s_KeygenMe_#5.zip, 32 kb (password: crackmes.de)
Browse contents of T.0.R.N.A.D.0.__s_KeygenMe_#5.zip

>>>> READ-ME FOR T.0.R.N.A.D.0.'s KeyGenMe #5
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PLATFORM :: WINDOWS
LANGUAGE :: .NET
DIFFICULTY :: 4 [ Needs Special Knowledge ]

The Rules:
==========---
(*) NO PATCHING
(*) NO BRUTE-FORCING

The Tasks:
==========---
1. Try to get Status as "VALID".
2. Find the algorithm for the computations involved.
3. Make keygen to VALID Key for ANY name. Please note that VALID KEYS EXIST FOR ALL NAMES.
4. Write a descent tutorial. ;)

Hint:
==========---
Think about MID(KEY,2,3). ;)
Here, KEY can be ANY VALID KEY.

~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~
printf("T.0.R.N.A.D.0. - born 2 %X\n",49374);
_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 24. Apr, 2009
Downloads: 484

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Solutions

Solution by indomit, published 29. apr, 2009; download (7 kb), password: crackmes.de or browse.

indomit has rated this crackme as quite nice.

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Discussion and comments

T.0.R.N.A.D.0. Author 25. Apr 2009	My first .NET KeyGen-Me :-) Your keygen should generate multiple keys for each name, IF MULTIPLE KEYS EXIST ;-)
indomit 27. Apr 2009	nice-nice crackme :) solution uploaded :)
T.0.R.N.A.D.0. Author 27. Apr 2009	Glad to know that you liked it :)
T.0.R.N.A.D.0. Author 29. Apr 2009	Oh! I just noticed that the hint i gave was useless :p I had decided to check mid(key,2,3) but later dumped it probably.
T.0.R.N.A.D.0. Author 29. Apr 2009	Thanx @ indomit for the solution.
papanyquiL 15. May 2009	Such a great keygenme :P
T.0.R.N.A.D.0. Author 16. May 2009	Glad to know that you liked it.

T.0.R.N.A.D.0.'s KeyGenMe #6

Download T.0.R.N.A.D.0.__s_KeygenMe_#6.zip, 321 kb (password: crackmes.de)
Browse contents of T.0.R.N.A.D.0.__s_KeygenMe_#6.zip

>>>> READ-ME FOR T.0.R.N.A.D.0.'s KeyGenMe #6
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The Rules:
==========---
(*) NO PATCHING
(*) NO BRUTE-FORCING

The Tasks:
==========---
1. Find the algorithm for the computations involved.
2. Try to get Status as ":-)".
3. Make keygen to generate VALID Keys for ANY name.
Please note that VALID KEYS EXIST FOR ALL NAMES.

** Keygens, able to generate multiple keys for each name will be preferred. **

4. Write a descent tutorial. ;)

Hint:
==========---
Well, no hints ;) This is .NET ! I'm giving my source code.

~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~

printf("T.0.R.N.A.D.0. - born 2 %X\n",49374);

_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 16. May, 2009
Downloads: 3364

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Solutions

Solution by indomit, published 26. may, 2009; download (22 kb), password: crackmes.de or browse.

indomit has not rated this crackme yet.

Send a message to T[9]Uvatha »

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Discussion and comments

T.0.R.N.A.D.0. Author 01. May 2009	This won't be as easy as Tic-Tac-Toe ;)
T.0.R.N.A.D.0. Author 16. May 2009	Many thanx to indomit for his patience and bug reports :-) << Previous comments on bugs are removed >>
T.0.R.N.A.D.0. Author 17. May 2009	OMG ! 1935 dowbloads !!!
indomit 18. May 2009	1947 / 4 = 487 per one version ;)
Filler 18. May 2009	Nice KeyGenMe T0rnad0!! Good work... ^^
T.0.R.N.A.D.0. Author 18. May 2009	LOL. Nice maths ! @ indomit Thanx @ Filler Sorry @ Everyone (for so many buggy versions !) I am really amazed at the rate at which the number of downloads is increasing : it's 2739 now ! I've seen many crackmes that are submitted before mine, but still haven't reached one-third this value !
papanyquiL 19. May 2009	Downloaded. Hmm... tricky... hahah
andrewl.us Moderator 26. May 2009	The "Show Steps" feature of indomit's keygen is really cool! Try it!
T.0.R.N.A.D.0. Author 27. May 2009	Great work indomit, splendid :) Thanx for the solution.
T.0.R.N.A.D.0. Author 27. May 2009	But the web-page you mentioned, doesn't open ! :( [http://gloriahuston.org/jit_cpp/fifteen_solve.txt]
indomit 27. May 2009	@T.0.R.N.A.D.0. Strange. It works for me as always :) Try this page: http://gloriahuston.org/jit_cpp/ and there is link to the sources
T.0.R.N.A.D.0. Author 27. May 2009	Yeah, it did that and it worked ! :) I don't know why FF showed "server not found" earlier.

T[9]Uvatha's T[9]Uvatha's 1st Crackme

Download T[9]Uvathas_1st_Crackme!.zip, 5 kb (password: crackmes.de)
Browse contents of T[9]Uvathas_1st_Crackme!.zip

The goal of this crackme is to enable the 2 controls, then find the serial, which is a bit harder because it's not hardcoded.

If you can, by any means, permanently enable the 2 controls and find the serial, then you will have successfully cracked this crackme.

Made in Vb6.0 on Aug 29th 2004

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 31. Aug, 2004
Downloads: 1421

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Solutions

Solution by CrackerSixx, published 01. sep, 2004; download (6 kb), password: crackmes.de or browse.

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Solution by ReDucTor, published 01. sep, 2004; download (4 kb), password: crackmes.de or browse.

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Send a message to TaGaDaPaF! »

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Discussion and comments

LeeviON 29. Nov 2008	Oh shit, i enabled text box and command button but did not got the serial! =(
ideku_nih 17. Apr 2012	me too, seem it has good jump technic.

TaGaDaPaF!'s Keygenme #1

Download keygenme1.zip, 14 kb (password: crackmes.de)
Browse contents of keygenme1.zip

A simple algo hard to find

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Jul, 2004
Downloads: 941

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Solutions

Solution by kao, published 08. jul, 2004; download (7 kb), password: crackmes.de or browse.

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takada's Takada's Keygenme #1

Download Keygenme_#1.zip, 34 kb (password: crackmes.de)
Browse contents of Keygenme_#1.zip

This is my first crackme
No packers are used
But I think, it is too hard for keygen

Intro:
Input all data
Press Enter
If you receive a message Then you are good cracker
Else
You are bad cracker

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 01. Jun, 2006
Downloads: 495

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Discussion and comments

takada Author 07. Jun 2006	Try this Real Code UserName: takada Serial: REA UnlockCode: C5F1C43F55587E7FE9B13A22F92E4A90
Tenshi 15. Jun 2006	ohhh, its to hard for me (iam a noob :) ), but i accept u used Rijndael and md1 or a special form from it..... nice keygen ;-)

Taliesin's KGM1Tal

Download KGM1Tal.zip, 2 kb (password: crackmes.de)
Browse contents of KGM1Tal.zip

KeyGenMe 1 by Taliesin

Window32 - Tested on XP and Win98.
Assembler - MASM32.

To complete:

1. Bypass debugger checks.
2. Write a keygenerator.
3. Submit keygen and tutorial.

Completion should be relatively easy. Only a few debugger checks. Algorithm for serial is not too complex.

Greetings go out to:

l0calh0st
HMX0101

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Assembler

Published: 14. May, 2006
Downloads: 774

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Solutions

Solution by indomit, published 17. may, 2006; download (11 kb), password: crackmes.de or browse.

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Solution by l0calh0st, published 17. may, 2006; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

l0calh0st 15. May 2006	Nice work Tal :) Debugger checks were different from what i have seen till now :)
HMX0101 15. May 2006	Good Job, Taliesin I have fished a serial for my name, but i can't understand when the crackme use my name :( Debugger checks, not is working for me :D
Ox87k 15. May 2006	yes, very nice work! i don't understand the debug tricks however not working for me!! =)
indomit 15. May 2006	I say it wonderful debugger checks! :) Very nice! The idea to check BP is good :)
indomit 15. May 2006	Maybe it bug? when you check first letter you do next: 00401423 . 80EE 41 SUB DH,41 <<-- not need!!! 00401426 . 8AF2 MOV DH,DL <<<< and when you check 3rd and other letters you do: 0040145F . 80EE 41 SUB DH,41 00401462 . 8AD6 MOV DL,DH <<<< it isn't important for solution, but... ;)
indomit 15. May 2006	not need!!! = have no effect... sorry for spam and my poor english %)
l0calh0st 15. May 2006	indomit ...are you sure what you said is right
indomit 15. May 2006	I'm not sure that is bug, but I sure that first operation SUB have no effect :) PS... I mistake... it is about 3rd and 4..9 symbols =)
Taliesin Author 15. May 2006	indomit, the minus 41 is used for the table...table is only 24 characters. Originally, when I wrote it, I had self-modifying code in it - Olly instead of skipping breaks, just told me I had overwritten it's Int3 instruction. That gave me the idea. The first call after GetDlgItemTextA does do something, it checks part of the serial format, among other things.
indomit 15. May 2006	Arrrgh %) I want say that Mov dh, dl and mov dl, dh is not the same! In first case u use minus 41 but on next operation u overvrite result stored in dh by dl. ) In second case all fine... Anyway, I wrote the tut and upload it yet :)
Taliesin Author 17. May 2006	Good job indomit & l0calh0st, nice tutorials. And thanks to everyone that tried this one. I see I'll have to increase the challenge so my next one isn't solved in 3 days. ;)

tamaroth's Ed Edd n' Eddy

Download Ed_Edd_n_Eddy.zip, 223 kb (password: crackmes.de)
Browse contents of Ed_Edd_n_Eddy.zip

Hello!

This is my another keygenme. Your task is to generate keymaker. Some parts of this keygenme are not reversible, so you might have to patch some values (no code patching though).

Don't give up! You will need an extensive knowledge of cryptography and mathematics to solve this one.

Best regards,
tamaroth

Difficulty: 6 - Hard, for very professionals only
Platform: Windows 7 Only
Language: C/C++

Published: 01. Mar, 2013
Downloads: 172

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Discussion and comments

redoC 02. Mar 2013	GNU MP lib with VC++ 2010? What version of GMP? Did you use GMP static .lib? From where can i download it?
redoC 02. Mar 2013	... and won't run on my Win7
tamaroth Moderator 04. Mar 2013	The library that I have used is mpir 2.4.0 and it was compiled by yours truly. Have you 'unpacked' it and then it's not running? or the original binary does not run?
redoC 04. Mar 2013	yes, of course, unpacked version not running, probably some protection
redoC 04. Mar 2013	MPIR 2.4.0 ...IDA Flair tools detects only 6 functions in crackme, someone have better results?
bearchik 12. Mar 2013	Yep. I unpacked this keygenme. I'm exploring serial algo now.

tamaroth's Keygenme #1 by tamaroth

Download keygenme#1_by_tamaroth.zip, 65 kb (password: crackmes.de)
Browse contents of keygenme#1_by_tamaroth.zip

Your task is to write a working keygen. In case you ask, yes, this can be keygenned, i did that. There's no crypto here at all, keygenme isn't packed or modified. If you have a question or a problem you want to ask about it, feel free to mail me at:

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 14. Oct, 2010
Downloads: 393

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by miguel, published 27. oct, 2010; download (6 kb), password: crackmes.de or browse.

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tamaroth's KeygenMe #2

Download keygenme_2_by_tamaroth.zip, 100 kb (password: crackmes.de)
Browse contents of keygenme_2_by_tamaroth.zip

Hey!

This is my another small keygenme, nothing complicated. Your task is to write a keygen that works at an instant speed.

I wrote it on the spur of the moment, so if you find some horrible bugs, pray tell!

Good luck and have fun!

Thanks to Buzzer for creating "Cubes"!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 20. Mar, 2012
Downloads: 562

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Solutions

Solution by redoC, published 02. oct, 2012; download (330 kb), password: crackmes.de or browse.

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Discussion and comments

zhangke 27. May 2012	Hi tamaroth, --------------------------- keygenme2.exe - Unable To Locate Component --------------------------- This application has failed to start because MSVCR100.dll was not found. Re-installing the application may fix this problem. --------------------------- OK --------------------------- This message occured when I try to run this keygenme2.exe. When you compiling the program in VS,You can set like the following to avoid this issue. Project->Property->C/C++->Code Generation->Runtime Lirary(set this to /MT) Regrads, Ke
tamaroth Moderator 30. May 2012	Yeah, it was build with /MD, I figured almost everyone has crt runtime installed, so why make crackme bigger :) In any case, you can download redist here: http://www.microsoft.com/en-us/download/keygenme_2_by_tamaroth.zip/details.aspx?id=14632 x86_64 http://www.microsoft.com/en-us/download/keygenme_2_by_tamaroth.zip/details.aspx?id=5555 x86
redoC 16. Sep 2012	Anyone have IDA signatures for GNU MP? "The GNU Multiple Precision Arithmetic Library" If so please post me a message.
tamaroth Moderator 20. Sep 2012	You can blackbox most of it. http://en.wikipedia.org/wiki/Blackboxing
redoC 25. Sep 2012	M=841423D9A83309F81F0069AB N=E7C1D538F09CCC070A63A95B BYTE HashValue[32] = SomeHash (Name&Group) HashValue = HashValue mod N RSAValue = pow (M, Serial) mod N final condition: HashValue == RSAValue ... how to compute serial?
HMX0101 26. Sep 2012	That's a problem known as DLP, can be solved using algorithms like pollard-rho, index calculus, etc. The author of the crackme wants you to calculate the serial at an instant speed, that's the interesting stuff about this crackme :-)
redoC 27. Sep 2012	Thanks, solution soon.

tamaroth's The Cube

Download the_cube.zip, 308 kb (password: crackmes.de)
Browse contents of the_cube.zip

Hello!

This is my next small toy. This time there's no crypto and the protection is slightly different.
I think you'll have to show off your coding skills more than anything on this one!

Acceptable solutions must contain a working keymaker and a tutorial or a brief description.

Crackme was packed by UPX 3.08 and you can unpack it by doing upx -d option. It was done solely to decrease the size of the binary.

If something's not working, let me know!

Best regards,
tamaroth

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 10. Oct, 2013
Downloads: 479

Rating

Votes: 3
Crackme is boring.

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Solutions

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Send a message to tay777 »

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Discussion and comments

Gyver75 18. Jan 2014	hi tamaroth! Your Crackme ( unpacked ) doesn't work under win 8.1 64 bit; i have tested also in win 7 64 bit and works only if you disable aslr protection! The side effect is that the packed version loads correctly everywhere! :)
tamaroth Moderator 20. Jan 2014	Hm,, I haven't tested it on W8/8.1 but it did work under win 7. Disabling ASLR should not cause any troubles. For the time being I do not have enough time to fix it, I'll do it as soon as possible though.
Crackerino 19. Feb 2014	Works on windows xp sp 3.
tamaroth Moderator 05. Feb 2015	This keygenme has a bug, that makes it VERY hard (although still solvable, just not by me any more). If you're really good with abstract algebra, go ahead and give it a go.
horntooter 03. Apr 2015	There's no crypto? I'm a little suspicious of that statement when the name field gets SHA1 hashed, and you say you need abstract algebra to solve it!
tamaroth Moderator 03. Apr 2015	Well, by no-crypto I meant c rypto to solve, one-way hashes are still technically crypto, but it's nothing that need to be reversed and is easily recognisable by flirt etc. I could of course force that 'name'input be a hexadecimal characters with the length of minimum 20 which would be the same really. But like I said, it's bugged in a serious way which alters the way you can solve it making it really hard.
KKR_WE_RULE 29. Dec 2015	Hi, had a little time and checking for unsolved cms, found this. Unpacked it and unpacked exe doesn't run in Win7 sp1 x86 and also tested in Win 8.1 and Win10 . It doesn't run. Is this part of your schema ?
apuromafo 08. Jan, 04:59	Gyver75 work fine unpacked upx here my unpacked http://rghost.net/7tRfRdK4X by other side if enter apuromafo, check apuromafowasher, if put apuromafowasher, this check apuromafowash, mm for other side is comparated a part before wash, post wash, and the w, when use hexa values you can see the validation.. Usind IDA not can recover at all the code.. well, thats is only there was checked br, APuromafo 00C81855 \| 68 C0 55 CA 00 \| push thecube_unpackeapuromafo.CA55C0 \| ;CA55C0:"Good job!\n Now write a keymaker and a tutorial!" 00C8185A \| EB 05 \| jmp thecube_unpackeapuromafo.C81861 \| 00C8185C \| 68 F0 55 CA 00 \| push thecube_unpackeapuromafo.CA55F0 \| ;CA55F0:"Something went wrong!"
tamaroth Moderator 19. Jan, 15:09	@KKR_WE_RULE: This crackme has a fatal flaw in its design. due to that flaw the difficulty is increased by like 5 points. It's become VERY HARD to solve now due to the fact that you have to figure out and write a new algebra for the system, while the intention was to use existing algebra. If you want to have basically the same thing but solvable for normal human beings, have a look at The Cube 2.

Solution by mjones, published 19. sep, 2007; download (704 kb), password: crackmes.de or browse.

mjones has rated this crackme as quite nice.

Solution by br0ken, published 19. sep, 2007; download (13 kb), password: crackmes.de or browse.

br0ken has rated this crackme as nothing special.

Solution by znycuk, published 19. sep, 2007; download (9 kb), password: crackmes.de or browse.

znycuk has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

mjones 20. Sep 2007	i liked the crackme as it taught me to enable vb form elements in ollydbg. also from the other solutions i found some new tools for vb apps. fun times

tay777's Picture crackme

Download crackme.zip, 79 kb (password: crackmes.de)
Browse contents of crackme.zip

A crackme were you have to guess a secret combo ,but not with letters or numbers ,but with pictures

Rules:
no patching
right tut on how you find out

My friend gave me this thought it was interesting so decided to post it to let you guys have fun with it

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 22. Feb, 2008
Downloads: 652

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Solutions

Solution by Potk4n, published 24. feb, 2008; download (35 kb), password: crackmes.de or browse.

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Solution by fromTurkey, published 24. feb, 2008; download (237 kb), password: crackmes.de or browse.

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Discussion and comments

fromTurkey 22. Feb 2008	hi cracked in 5 minutes... :) but very interesting and different thanks for this crackme tay777....:) I will write a little tut for this.
dom1n00 22. Feb 2008	yeah. max 3 minute the solution :)
DigitalAcid 22. Feb 2008	Well, the picture provided as hint, made it alot easier :).
jamesinuk 26. Feb 2008	I like the idea of a picture insted of numbers....very easy to crack! 2 mins ..beat you 2 ;)
ruslik 01. Mar 2008	hi why don't you obfusscate numbers on the image? cause it's too easy now :)
DigitalAcid 01. Mar 2008	Yeah, but it would take some more time then and people would probably not solve it =). Finding out the right numbers for the right parts is just a matter of time anyway. I started doing it like that, but then i looked at the picture :P.

tcn30's Crackme4

Download PasswordApp2.zip, 211 kb (password: crackmes.de)
Browse contents of PasswordApp2.zip

Enter the correct username and password to get the goodboy. No patching allowed.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 30. Dec, 2007
Downloads: 662

Rating

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Solutions

Solution by Computer_Angel, published 14. jan, 2008; download (2 kb), password: crackmes.de or browse.

Computer_Angel has rated this crackme as boring crap.

Discussion and comments

DigitalAcid 31. Dec 2007	Nice one, anyone else tried/solved it ?
tcn30 Author 01. Jan 2008	soychino provided me with correct username and password. Next crackme will be much harder as soychino pointed out a much better method of comparing which requires very little modification. Am ready to submit next crackme later today ;)

tcn30's Crackme 3

Download Crackme3.zip, 63 kb (password: crackmes.de)
Browse contents of Crackme3.zip

Type in the correct username and password. No patching allowed.

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 25. Dec, 2007
Downloads: 671

Rating

Votes: 7
Crackme is quite bad.

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Solutions

Solution by main, published 01. nov, 2008; download (1284 kb), password: crackmes.de or browse.

main has rated this crackme as quite nice.

Discussion and comments

soychino 25. Dec 2007	richard peugeot because decode and encode are reversible so it's simply a md5 encryption
tcn30 Author 25. Dec 2007	there is another username and password as well.
soychino 25. Dec 2007	are the md5s of username and serial as follows? 5532EA1121C4C3C8ACEC7f1D378A3F76 67F3A873D1F7CECA8C3C4C1211AE2355
tcn30 Author 25. Dec 2007	Yes thats the MD5 username and pass. But there is also another username and pass that uses a different encryption technique.
m@rio_crk 25. Dec 2007	OK one pair of solution is: 6AE199A93C381BF6D5DE27491139D3F9 9F6CF82DEB99289E14AEA9DCC24E54CB (which is solved by soychino) and the second pair: 67F3A873D1F7CECA8C3C4C1211AE2355 23EB5D0DDB99AF268BC17C9A63D32AD5 that one is harder. I tried standard english dictionary attack and bruteforce with 0-9 charset, no result.. (Celeron M 1,6 Mhz ;P )
tcn30 Author 25. Dec 2007	Not sure where you got that 2nd pair from as thats simply incorrect.
soychino 26. Dec 2007	the first condition has been worked out ,as to the second i think the condition is decrypt(1p9vPg/XRe.......,ABDF743.....)=decrypt(encrypt(md5(serial),ABDF743.....),ABDF743.....) so we can assume encrypt(md5(serial),ABDF743.....)=1p9vPg/XRe.......,thus md5(serial)=decrypt(1p9vPg/XRe.......,ABDF743.....),there is also a similar equation of the username,but it there seems no solution, am i wrong ? ps: the encryption consists of rijindael and base64,right?
tcn30 Author 26. Dec 2007	The tutorial submitted by synak is far from complete. It only shows how to find the 1st username & pass so that tut is invalid.
m@rio_crk 26. Dec 2007	soychino: Little mistake here: md5(serial)=decrypt(1p9vPg/XRe.......,ABDF743.....) NOT serial, but name: md5(name)=decrypt(1p9vPg/XRe.......,ABDF743.....) and so: md5(name)=67F3A873D1F7CECA8C3C4C1211AE2355 and for md5(serial) = 23EB5D0DDB99AF268BC17C9A63D32AD5 I checked this couple of times now, it must be right, but this also needs to be bruteforced..
tcn30 Author 27. Dec 2007	I think you must have the first crackme i submitted, it has been updated since then.
tcn30 Author 27. Dec 2007	1p9vPg/XReKyDADJx7O1juK6KwsNneaLV+iztkVVjptfLHbxO+suSRX8V/lZ+ZJ3 8+k/OamDIWXKRS7UrbAfiizNVwtnb3+WNSzdENYNaWNQp4uCP1NbjLAzIAf2eKJq Thats the 2nd encrypted username and password.
MACH4 06. May 2008	tcn30, Are you expecting us to Bruteforce this? it would take years! Are there any clues? Perhaps the first char of name! What dictionary are we using? Is the serial numeric, alphnumeric etc? Need some guidance because I can't see a way of reversing the algo! MACH4
main 20. Oct 2008	Can you say the length of user name and password? Then we know if bruteforcing is an option.
main 20. Oct 2008	I found the special username and password :) Both username and password are 7 characters. So, bruteforceable for you who want to try!
main 20. Oct 2008	I saw someone already found that. The second username is Santa101, but I have not found the second password.
main 20. Oct 2008	The second password is Xmas909 :P
tcn30 Author 28. Oct 2008	congrats, a solution would be nice :)
main 28. Oct 2008	Actually, I don´t know if my solution is a "real" solution, but, well, I solved it, so maybe I could post solution then :)
tcn30 Author 29. Oct 2008	Well you managed to find the username and password. Just tell us all how u did it. I`d like to know myself :)
main 30. Oct 2008	I wrote long comment about how I solved it, but it got deleted by moderators... I can post short solution later if no one else does it.
tcn30 Author 01. Nov 2008	Excellent solution main, i really am impressed. Some of you guys really are very very clever. Well done!
main 01. Nov 2008	Thanks :). Good work yourself!

tcn30's Crackme 5

Download Crackme5.zip, 211 kb (password: crackmes.de)
Browse contents of Crackme5.zip

Type in the correct username and password to get the good boy. No patching allowed.

If the incorrect username and password is typed in the program will just exit without any message. Only 1 correct username and password will get the good boy.

Have fun and happy new year!
Good luck! ;)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 03. Jan, 2008
Downloads: 494

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

Computer_Angel 14. Jan 2008	I see you're using user input as key to decode the user/pass store in file. Is there any other way than bruteforce ?

tcn30's Crackme 6

Download crackme6.zip, 236 kb (password: crackmes.de)
Browse contents of crackme6.zip

Find the password for the 1st form which then leads on to a 2nd form which consists of a username and password which you will also need to find to complete the crackme.

Have fun as always ;)
TcN30.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 04. Jan, 2008
Downloads: 591

Rating

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Discussion and comments

tcn30's Crackme 7

Download Crackme_7.zip, 44 kb (password: crackmes.de)
Browse contents of Crackme_7.zip

Find the username and password to get the good boy :)
No patching as always.

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 07. Jan, 2008
Downloads: 490

Rating

Votes: 4
Crackme is boring crap.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Discussion and comments

ZeroCoder 08. Jan 2008	ohhhh... no new idea make SHA512 hash1 from username make SHA512 hash2 from password cmp hash1=constant1 and cmp hash2=constant2 ... no good crackme... only bruteforce ps "You Elite cracker"... no... "You SupaMega computer"
tcn30 Author 08. Jan 2008	SHA512 is just the tip of the iceberg, theres far more encryption than just that.
ZeroCoder 08. Jan 2008	:)) i see all source, may be just (more encryption) but solution = bruteforce (longtime)
tcn30 Author 09. Jan 2008	Well i have a decrypt routine that works well with this crackme. Brute force isn`t the only way ;)
seleng 27. Jan 2008	cannot string this program ????????????
InterGhost 01. Jun 2008	Is it "Difficulty: 3 - Getting harder"??!!!!!!
c0nr4id3r 01. Mar 2009	"Well i have a decrypt routine that works well with this crackme. Brute force isn`t the only way ;)" really? Would be nice, if you could show us the Decrypt routine.

tcn30's Crackme 8

Download crackme8.zip, 11 kb (password: crackmes.de)
Browse contents of crackme8.zip

Just guess the password! Written in c++ with /clr compile option.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 01. Sep, 2008
Downloads: 546

Rating

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Solutions

Solution by indomit, published 11. sep, 2008; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

kao 01. Sep 2008	Non-working, unless you have specific version(?) of msvcm90.dll, msvcp90.dll and msvcr90.dll Those DLLs are not part of Windows XP and are not included in ZIP. You could find them somewhere on MS site though.
indomit 02. Sep 2008	I think it's level 1 difficulty crackme.
tcn30 Author 08. Sep 2008	submit a solution then :)
pixartist 09. Sep 2008	i actually guessed the password in the FIRST TRY am i a genius?

tcn30's Crackme 9

Download 3.zip, 3 kb (password: crackmes.de)
Browse contents of 3.zip

Just enter the correct password for the good boy!
No patching.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 18. Sep, 2008
Downloads: 573

Rating

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Solutions

Solution by JoKa, published 23. sep, 2008; download (2 kb), password: crackmes.de or browse.

JoKa has rated this crackme as nothing special.

Solution by main, published 23. sep, 2008; download (584 b), password: crackmes.de or browse.

main has not rated this crackme yet.

Discussion and comments

MrGneissGuy 19. Sep 2008	Wow, THAT was a level 2?
main 19. Sep 2008	Is Reflector allowed? (I am new here) :P
main 20. Sep 2008	If Reflector is allowed, then this is very easy. So, I guess it´s not?
obnoxious 20. Sep 2008	@main is it easy using reflector.... then u must write a tut. BTW i guess reflector is allowed since its a .net crackme n our beloved olly can't handle .net. So go ahead and write a tut....
tcn30 Author 21. Sep 2008	of course reflector is allowed.
JoKa 22. Sep 2008	Our beloved Olly can handle it (OllyDbg 1.10 version). It just doesn't stop at entry point.
terrak 26. Sep 2008	im really new so what is reflector?
Sinok 28. Sep 2008	JoKa: You can't debug .NET applications with ODBG :\|
JoKa 29. Sep 2008	Sinok: Of course I can (on WinXP). See my solution.

tcn30's Password app

Download PasswordApp.zip, 214 kb (password: crackmes.de)
Browse contents of PasswordApp.zip

This is my first crackme written in borland delphi.
Guess the password to crack the application using any means necessary but no patching, password is required.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 29. Nov, 2007
Downloads: 8855

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by ascii, published 05. dec, 2007; download (790 b), password: crackmes.de or browse.

ascii has rated this crackme as awesome.

Solution by Bitpatcher, published 05. dec, 2007; download (1 kb), password: crackmes.de or browse.

Bitpatcher has not rated this crackme yet.

Discussion and comments

ascii 04. Dec 2007	Is there really a password ? The only way I found was to make a proxy-dll. Because if I modify only one return value from one Windows function, any password works.
ascii 04. Dec 2007	Nevermind, I was TOTALLY wrong. Im commiting a solution.
TiGa 05. Dec 2007	The crackme has been updated with a new version AFTER the solutions were approved.
tcn30 Author 06. Dec 2007	New exe features basic obfuscation and isdebugger present api.
hitz4ever 26. Dec 2007	wat is the password?

tcn30's Password_VB

Download password_vb.zip, 40 kb (password: crackmes.de)
Browse contents of password_vb.zip

Find the password, no patching allowed.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 11. Dec, 2007
Downloads: 1158

Rating

Votes: 6
Crackme is boring crap.

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Solutions

Solution by Pimp.exe, published 13. dec, 2007; download (1 kb), password: crackmes.de or browse.

Pimp.exe has rated this crackme as boring crap.

Solution by Wasted_Bytes, published 13. dec, 2007; download (24 kb), password: crackmes.de or browse.

Wasted_Bytes has rated this crackme as boring crap.

Solution by saitob, published 13. dec, 2007; download (231 kb), password: crackmes.de or browse.

saitob has not rated this crackme yet.

Solution by halsten, published 13. dec, 2007; download (41 kb), password: crackmes.de or browse.

halsten has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

KoЯn Rulz 19. Dec 2007	definatly boring crap but neat icon

TDC[NL]'s CodeShield

Download CODESHIELD.ZIP, 54 kb (password: crackmes.de)
Browse contents of CODESHIELD.ZIP

Some other 1337 protection this time :-)
Have fun having a hard time ...

1 hint though: don't let it crack your mind, you need your mind more than just today

greetz TDC

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Assembler

Published: 13. Nov, 2005
Downloads: 1140

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by bbvv, published 15. nov, 2005; download (22 kb), password: crackmes.de or browse.

bbvv has rated this crackme as nothing special.

Solution by deroko, published 15. nov, 2005; download (6 kb), password: crackmes.de or browse.

deroko has rated this crackme as quite nice.

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Discussion and comments

TDC[NL] Author 13. Nov 2005	Remember, no patching :-)
deroko 13. Nov 2005	solved, just to write solution.
TDC[NL] Author 14. Nov 2005	cool, I know this one is solve-able because you can insert a password so it will jump to the messagebox code, because you know where the messagebox code should be (just before the jump that goes to return) i'll make a harder one
konstAnt 14. Nov 2005	Sorry I can't solve it coz I have just installed WIn 98 And this is just for XP/2000 but I'm trying the keyfile me and it is some what tough..
TDC[NL] Author 15. Nov 2005	Well what do you see when trying to solve it? I think this one should run on Win98 too konstAnt

TDC[NL]'s CodeShield II

Download CODESHL2.ZIP, 56 kb (password: crackmes.de)
Browse contents of CODESHL2.ZIP

Hehe my other CodeShield got solved, so I am striking back with CodeShield II :-)

I hope this one is not that easy,

- Greetz TDC

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Assembler

Published: 15. Nov, 2005
Downloads: 787

Rating

Votes: 9
Crackme is quite nice.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

kao 15. Nov 2005	Very much overrated. Difficulty 3-4 would be more appropriate.
TDC[NL] Author 15. Nov 2005	For some it's easy kao, for others not, I think your skills at this stuff is maybe just better and that could be why u think it is easy :)
deroko 15. Nov 2005	After ReadProcessMemory edx is set to 5 on xp sp2 (after successful read, didn't check what happens with edx if read fails), and on win2k is set to 1, latter edx is used as index to inputed serial and it is not set to 0 nor any other number but it's value depends from last called api. Is this a bug?
MaxM 15. Nov 2005	yeah, I noted it too in IDA right now. mmh... M$ specs for WinBool should state that true is any <>0, so assuming (1) as true is a fault on WinAPI, I think...
deroko 16. Nov 2005	well problem is that edx is not preserved during ReadProcessMemory and holds some "random" value, so my q is : can we patch just this to set edx to 0...
kao 16. Nov 2005	TDC, this was not meant as offense.. ;) I downloaded it because I expected a challenge that will last for 2-3 hours, but found a simple encryption that requires smart bruteforce.. ;) A crackme that is level "8 - very very hard" should have more than that.. Even if all bugs in the crackme (like above mentioned EDX usage, buffer overflow in serial input and possible use of ProcessId in decryption, SEH handler that does not behave like it should) are intentional "features", it still is no harder than "5 - professional problem to solve"..
TDC[NL] Author 17. Nov 2005	quote from kao.. 'simple encryption that requires smart bruteforce.. ;)' hehe i bet you need smart bruteforce for this one, but it's not bugged in any way i'm sure of it, if you input the right pass, it decrypts the codes to show the message and decrypt the message the SEH handler is just ment to quit the crackme if it begins to execute buggy codes generated from a wrong pass
TDC[NL] Author 22. Nov 2005	So... any1 going to solve this one and write a nice tut? :)
D4ph1 22. Nov 2005	Great crackme TDC!;)
Vohligh 24. Nov 2005	Can you give any hints as to how long the password is?
TDC[NL] Author 29. Nov 2005	ok, the password is about 14 characters long :)
Yosh64 13. Dec 2005	hah, i've tried a crackme like this before... where the password is used to decrypt the code... hmm... gonna be tough to figure without knowing what the code is meant to be :\
TDC[NL] Author 31. Dec 2005	hehe, i give 1 hint the password is used to decrypt the opcodes to decrypt the opcodes for the junk/messagebox and that all filled with junk ^_^
TDC[NL] Author 07. Feb 2006	Anyone yet solved it? I think I know a nice bruteforcing way that would work. If anyone interested leave comments and I'll see if I can contact ya, or post my ideas here.
HMX0101 08. Feb 2006	Great crackme, TDC! Good Job!
jetamin 08. May 2006	i think that EDX sets to 5 because thats the number of bytes readen ...
jetamin 12. May 2006	is anyone still tryes this one ???

TDC[NL]'s KeyGenME CM#8

Download TDC.Crckme8.zip, 25 kb (password: crackmes.de)
Browse contents of TDC.Crckme8.zip

Just a little keygenme, hope you guys like it! :-)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 17. Oct, 2005
Downloads: 2153

Rating

Votes: 10
Crackme is boring.

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Solutions

Solution by Ox87k, published 18. oct, 2005; download (28 kb), password: crackmes.de or browse.

Ox87k has rated this crackme as nothing special.

Solution by Lesco, published 18. oct, 2005; download (5 kb), password: crackmes.de or browse.

Lesco has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

Lesco 17. Oct 2005	Lesco 2?95Ëœ))))))))))) Solution and keygen in work
Lesco 17. Oct 2005	Solution submitted ;) Easy, crackme, good for complete beginners, very clear structure and code
Ox87k 17. Oct 2005	yeah, so simple :D i vote for self-keygen so i hope my solution will be approvated... btw, thanks for this keygenme :D
konstAnt 17. Oct 2005	[quote] Lesco 2?95Ëœ))))))))))) [/quote] Hey lesco u perhaps didn't figure out that the brackets r not necessary.... Yah an easy keygen made and solution submitted....... Yah TDC thanks for such an easy keygenme :lol
D4ph1 17. Oct 2005	hmmmm something is going on with the last string of the serial. If the first n-1 (n=length of name) strings of the serial are right then you can put another string, whatever you like,and the serial is right again! ;)
konstAnt 18. Oct 2005	Yah I agree with u..
konstAnt 18. Oct 2005	My soln is rejected coz there were too many solns
D4ph1 18. Oct 2005	mine too is rejected for the same reason
konstAnt 19. Oct 2005	My solution to this crackme is at http://geocities.com/spider_guyz/solntdc.zip
m@[tador] 24. Nov 2005	TDC, your keygenme#8 does not work properly. I made the keygen (algo is not so hard). But you don't need make any keygens. Just write in Name field anything and leave Serial field blank. And crackme says that it solved. ;-)...
deibiz_xxl 24. Dec 2005	that don't work properly

TDC[NL]'s TDC.Crackme10

Download [TDC.Crackme10]KeyGenME.zip, 128 kb (password: crackmes.de)
Browse contents of [TDC.Crackme10]KeyGenME.zip

Another keygenme, just little XOR and ROL here and there, checksum procedure and reverse needed.

Have fun, greetz TDC

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 03. Nov, 2005
Downloads: 1180

Rating

Votes: 9
Crackme is nothing special.

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Solutions

Solution by Cyber_Punk_III, published 10. nov, 2005; download (8 kb), password: crackmes.de or browse.

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Solution by LAS3R, published 10. nov, 2005; download (5 kb), password: crackmes.de or browse.

LAS3R has rated this crackme as quite nice.

Solution by TELOPHASE, published 10. nov, 2005; download (50 kb), password: crackmes.de or browse.

TELOPHASE has rated this crackme as nothing special.

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Discussion and comments

TELOPHASE 03. Nov 2005	Nice work with the crackme! Solution submitted :D PS: I found a bug in the crackme, If name < 5 then you get error message but even if the name length is equal to 5 still you get the error message. So i think you should fix that ;) Make it this way : if(strlen(name) < 5 \|\| strlen(name) > 51) Greetz.
TDC[NL] Author 03. Nov 2005	no.. that is not a bug i said, name should be BETWEEN 5 and 51 so it must be OVER 5, so 6 till 50 are valid lengths
D4ph1 03. Nov 2005	Another bug I think is that the Name Box doesn't accept a Name more than 30 characters...so you can't enter a Name with 50 chars like the error message says...The same thing happens with the Serial Box. Solution on the way :)
TDC[NL] Author 03. Nov 2005	oh yeah, that is true, i forgot to make it 50 hex instead of 50 decimal thanks for noticing but u like algorithm? :-)
Ox87k 03. Nov 2005	great crackme but so simple :D btw, i look it only now :( I try to write a kgn and tutorial... I hope not to be too late :) Tnx TDC!
Lesco 03. Nov 2005	keygenned it to, but telophase already submitted already a solution so why another one? but a simple algorithm
TELOPHASE 03. Nov 2005	The algorithm is nice but simple!, but still great work TDC[NL]! Hoping more crackme's from you ;)
TDC[NL] Author 03. Nov 2005	yep more will come
TDC[NL] Author 03. Nov 2005	btw, i write such crackmes because there are so much newbies hunting for good simple crackmes, I hope this is one of them :)
modchip 04. Nov 2005	nice one tdc! hope theres many more to come...
konstAnt 04. Nov 2005	Yah a great crackme but a easy one valid username and password konstAnt 2967272592
D4ph1 04. Nov 2005	Keep up the good work TDC ;)
Cyber_Punk_III 10. Nov 2005	solution submited waiting for moderators now ;)

TDC[NL]'s [TDC.Crackme11]KeyGenME

Download [TDC.Crackme11]KeyGenME.zip, 123 kb (password: crackmes.de)
Browse contents of [TDC.Crackme11]KeyGenME.zip

No hints, do this one yourself. But look! Where are the strings? :)

;-) u know it...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 04. Nov, 2005
Downloads: 1367

Rating

Votes: 8
Crackme is nothing special.

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Solutions

Solution by Ox87k, published 09. nov, 2005; download (39 kb), password: crackmes.de or browse.

Ox87k has rated this crackme as nothing special.

Solution by TELOPHASE, published 12. nov, 2005; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

TELOPHASE 04. Nov 2005	Nice work again, TDC!!! But was again simple to work with :D, was very similar to Crackme #10, except for SystemTime.Month ;-) Solution Submited :) Greetz To All :)
konstAnt 04. Nov 2005	I'm waiting for crackmes 12
Ox87k 04. Nov 2005	o my god! everyday another crackme... it's so coooooooooool!!!! Tdc, i come back to school only now and i'm too late but if there is only 1 solution i reverse it! Thanks for ur great work!
konstAnt 05. Nov 2005	I'm not saying coz there are 1 crackmes a day but 12 is my lucky no and I'll give the solution fr that.....
lord_Phoenix 06. Nov 2005	nice one, TDC!! i'm a true level 3 keygenner =) thanks for ur great work!
madlogik 08. Nov 2005	Congratulations! You are now level 3! :-) I didn't keygen it.. .. as usual I only reversed 1 instruction!!! Im a cracker.. not a math genious! hehehe -M@DL0G!K-
konstAnt 09. Nov 2005	Well that's a cracker's sprite....... madlogik
TDC[NL] Author 09. Nov 2005	hehe thx for all this compliments :), i will look to make a harder one hehe
[Shearer] 12. Nov 2005	Good job!!! Am i in level 3??? :)

TDC[NL]'s TDC[NL]'s [TDC.Crackme21]KeyGenME

Download [TDC.Crackme21]KeyGenMe.zip, 30 kb (password: crackmes.de)
Browse contents of [TDC.Crackme21]KeyGenMe.zip

- crackme loads API addresses manually without IAT :), some obfuscation tricks that might be tricky for some people :) have fun reversing

- btw, not all of my crackmes are @ crackmes.de
visit http://reversemasters.gtp-webserver.com/ for more :)

--> greetz, TDCNL

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 01. Feb, 2006
Downloads: 1006

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Solutions

Solution by ManSun, published 05. feb, 2006; download (54 kb), password: crackmes.de or browse.

ManSun has rated this crackme as awesome.

Solution by haggar, published 02. feb, 2006; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 01. Feb 2006	good crackme, TDC you rule!
ManSun 01. Feb 2006	Good? it is to easy Difficult: 1 Simple crackme with couple dummy opcodes. I cracked it, I have serial & function to check serial ;) Keygen and tut might come later! (http://ict.xt.pl)
deroko 02. Feb 2006	easy, but it is nice crackme imho...
UprisingSun 04. Feb 2006	I agree, This crackme should be rated as 1 for several reasons: 1. the packers aren't modified in any tricky way. 2. the anti-tracing tricks doesn't really fool IDA. There is an other issue , some of the valid serials can't be entered because the dialog box is too small for the width of some chars (try using several 'A's for example)
hikmatic 05. Feb 2006	anything packed with anti-debug tricks no matter how simple should be labeled a 2
TDC[NL] Author 07. Feb 2006	Thank you for compliments :) It's a nice try for newbies who are not yet very fimilair with unpacking and want to try something on their own, because the UPX sections are modified, no auto-unpack can be done. Furthermore, the crackme is double-packed, it's also packed with PEPACK can be unpacked usual unpacking way.

TDC[NL]'s TDC CrackME [#4]

Download tdc.crackme4.zip, 71 kb (password: crackmes.de)
Browse contents of tdc.crackme4.zip

I hope it's a nice little password crackme.
Good luck and have fun!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 28. Aug, 2005
Downloads: 992

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by Knight, published 29. aug, 2005; download (23 kb), password: crackmes.de or browse.

Knight has rated this crackme as quite nice.

Solution by NoRG, published 29. aug, 2005; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

TDC[NL]'s TDC CrackME [#4.5]

Download tdc.crackme4.5.zip, 70 kb (password: crackmes.de)
Browse contents of tdc.crackme4.5.zip

Nice additions, everything is now encrypted, have phun reversing :-)
Also nice desing I think/hope. Let me know if you were able to solve this one :-)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 28. Aug, 2005
Downloads: 862

Rating

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Solutions

Solution by NoRG, published 29. aug, 2005; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

TDC[NL]'s TDC CrackME #9

Download [TDC.Crackme9]KeyFileME.zip, 37 kb (password: crackmes.de)
Browse contents of [TDC.Crackme9]KeyFileME.zip

KeyFileME this time :-) I hope (I'm sure) you can solve it, it got two levels, one for newbies and one for the after-newbies :-)

Keep checking my crackmes out I have something new soon :-)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 12. Nov, 2005
Downloads: 1040

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by bbvv, published 15. nov, 2005; download (21 kb), password: crackmes.de or browse.

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Solution by SunSatION, published 15. nov, 2005; download (78 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 13. Nov 2005	i solved it but now i haven't time for write the solution :( ex in keyfile 123 0000000000000000000000x1x2x3x4 when x are: x1=x2=0x8 x3=0x2 x4=0x1 bye!
Cyber_Punk_III 15. Nov 2005	I solved and solution submited.

TDC[NL]'s TDC KeyFile ME [#2]

Download keyfileme.zip, 71 kb (password: crackmes.de)
Browse contents of keyfileme.zip

Not too hard, good practice for newbies and beginners :-).If you found a solution write a keyfile maker if you want, and email me about the solution, I'd like that :-)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 28. Aug, 2005
Downloads: 1305

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by _HellDashX_, published 29. aug, 2005; download (7 kb), password: crackmes.de or browse.

_HellDashX_ has rated this crackme as boring.

Solution by Ox87k, published 29. aug, 2005; download (53 kb), password: crackmes.de or browse.

Ox87k has rated this crackme as quite nice.

Solution by missing in bytes, published 29. aug, 2005; download (6 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Ox87k 28. Aug 2005	ehehe submit solution :P
_HellDashX_ 29. Aug 2005	Me too, submited..:)
myllan 02. Sep 2005	I think there is a bug in this crackme. No keyfile is working on W98 :(, but on XP are all working.
TDC[NL] Author 16. Oct 2005	16 character names don't work too, i know, but it's a nice crackme i think
l0calh0st 08. May 2006	Sorry was a typo error :P Nice for newbies to get started with keyfiles.... Posts should be editable :)

TDC[NL]'s X-Convertor Tool [CrackME]

Download X-Convertor.zip, 45 kb (password: crackmes.de)
Browse contents of X-Convertor.zip

This is a little nice tool-crackme TDC (me) and BoR0 wrote, it's also a nice exercise.Check the About box for more information.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 28. Aug, 2005
Downloads: 1128

Rating

Votes: 7
Crackme is boring.

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Solutions

Solution by EsKiMo, published 29. aug, 2005; download (13 kb), password: crackmes.de or browse.

EsKiMo has rated this crackme as quite nice.

Solution by Ox87k, published 30. aug, 2005; download (32 kb), password: crackmes.de or browse.

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Discussion and comments

SunSatION 28. Aug 2005	What's our mission? Keygening? Thanks
Ox87k 28. Aug 2005	submit solution :)
EsKiMo 29. Aug 2005	@ missing, Ox87k and Lesco your keygens are bugged. They will worked perfectly for any valid length except for 11. If length is equal to 11 then it will not just PAD one space but it will also replace 8 chars starting by the 4th char: 123[46578901]2
Ox87k 29. Aug 2005	lol sorry!!! can i remake my keygen and resubmit my solution or not? (another sorry, i didn't see this bug!)
EsKiMo 30. Aug 2005	Interesting enough we can register the crackme with a username with less than 4 chars! (Although the crackme asks for 4-12 length!). How can we do this? Easy, just create its keyfile and we'll bypass the crackmes' length check! @0x87k Interesting keygen's layout, plenty of effects :]
Ox87k 30. Aug 2005	thanks eskimo... in this time i've zero time for pc so i reverse very very quickly and if i missing somethings in keygen, sorry! ^^' i'm desolated :(
TDC[NL] Author 16. Oct 2005	hehe good to see you had som fun doing this ^_^
Fredro 29. Mar 2006	I've made a tutorial about this one at BiW reversing site for the once who wants to go in detail, www.reversing.be
l0calh0st 29. Mar 2006	It was simple :P Thanks..Another tool added to my cracking library :D

Send a message to Telecrackie »

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Discussion and comments

deroko 09. Sep 2005	solution submitted =)
Telecrackie Author 09. Sep 2005	Congratulations, Deroko! I am very strained on your solution. It was too easy, hm? Come on: try my other crackmes too... :o)
deroko 09. Sep 2005	I've downloaded rec.exe so I'll take look at it latter =)

Telecrackie's REC-Crackme

Download rec.zip, 70 kb (password: crackmes.de)
Browse contents of rec.zip

There is just one way to register... find it out!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 09. Sep, 2005
Downloads: 888

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by deroko, published 10. sep, 2005; download (74 kb), password: crackmes.de or browse.

deroko has rated this crackme as nothing special.

Solution by NoRG, published 10. sep, 2005; download (23 kb), password: crackmes.de or browse.

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Send a message to terminator »

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Discussion and comments

deroko 09. Sep 2005	As I promised I got this one also =) little luck but I have solution =)
NoRG 10. Sep 2005	deroko, I thinks it's not right solution. If you used patching, it can be done only by changing 1 byte: 000006BF: 6A 00
deroko 10. Sep 2005	dunno, just aded at the end so it uses my command line instead of it's own =)

Download terminator1.zip, 34 kb (password: crackmes.de)
Browse contents of terminator1.zip

serial+patching (asm)

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Jun, 2001
Downloads: 1613

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Solutions

Solution by psycho arjani, published 21. jun, 2001; download (3 kb), password: crackmes.de or browse.

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Solution by bl00dbath, published 21. jun, 2001; download (80 kb), password: crackmes.de or browse.

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Solution by sphinx, published 21. jun, 2001; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

terminator's terminator3

Download terminator3.zip, 14 kb (password: crackmes.de)
Browse contents of terminator3.zip

name/serial (vb5)

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 21. Jun, 2001
Downloads: 1928

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Solutions

Solution by psycho arjani, published 21. jun, 2001; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

TFB's CryxeNET 0.01a

Download Release.zip, 12 kb (password: crackmes.de)
Browse contents of Release.zip

This is a little .NET protector that I coded yesterday when I was bored. Look in todo.txt for further information
on its current features and features I plan to add.

The goal of this exercise is to unpack the protected keygenme and patch/keygen (whatever you prefer) it to display
the good boy message for any serial entered. No rules, anything flies, as long as you get the job done.

My only rquirement is that you write a tutorial when you finish and include some suggestions for the next version
of the protector!

-TFB

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 24. Aug, 2007
Downloads: 648

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by Kurapica, published 03. apr, 2008; download (1043 kb), password: crackmes.de or browse.

Kurapica has rated this crackme as quite nice.

Solution by fr0zenice, published 19. jan, 2008; download (21 kb), password: crackmes.de or browse.

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Discussion and comments

UFO-Pu55y 10. Dec 2007	Um.. how come, this hasn't been solved :? Ok, no problem with .NET DeProtector, but that wouldn't be the honest way to go. I tried to manually deobfuscate "public void b(object A_0, EventArgs A_1);", to make it readable in HL.. mission failed :-/
fr0zenice 19. Jan 2008	not bad TFB :) nice obfuscation and loader stuff there I'm curious about the stuff you want to add, especially: -Anti Ildasm -cloning entire procedures keep it coming!
TFB Author 26. Jan 2008	Superb solution fr0zenice, and great job! I just released the second .NET unpackme. Keep your eyes peeled for it!
BRK12345 16. Mar 2008	lol if you leave everything blank then it says it is correct!
r00ster 03. Apr 2008	am i wrong, or the program has been obfuscated with Dotfuscator?
TFB Author 17. Apr 2008	It has, but that is far from the only protection.

TFB's Cryxenet 0.02 Unpackme

Download cryxenet002unpackme.zip, 12 kb (password: crackmes.de)
Browse contents of cryxenet002unpackme.zip

Anything goes. Read the readme and good luck. IMO much harder than the last ver ;)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 26. Jan, 2008
Downloads: 488

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

soychino 27. Jan 2008	i have made a loader..
TFB Author 27. Jan 2008	A loader!? Hah, well I said anything like in real life. Go ahead and post it as a solution, although I would really appreciate it if someone unpacked it :) Note to self: Lots of CRC checks in next ver :)
Jim~ 03. Feb 2008	I've got your decoding function down. Now to figure out how to incorporate native.dll in the cryxed pe... Having fun :)

TFB's Cryxe 0.01

Download protected.zip, 93 kb (password: crackmes.de)
Browse contents of protected.zip

A custom protector I coded. No antidumps so far, just file encryption. Good practice for the noobies, I think. Just unpack it, and write a tuto. Anything goes, but it has to be fully unpacked.

What can I say? Its spring break and I'm bored :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 06. Apr, 2007
Downloads: 1174

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Solutions

Solution by deroko, published 09. apr, 2007; download (94 kb), password: crackmes.de or browse.

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Discussion and comments

deroko 06. Apr 2007	very simple, but interesting. Anyway, finaly some unpackme...
TFB Author 06. Apr 2007	ccc knew it would be deroko. Not much antisice here for you, I'm afraid.
deroko 06. Apr 2007	nice anti-olly btw :)
TFB Author 09. Apr 2007	Good work deroko :)
Phiber Optik 12. Apr 2007	reported virus by kaspersky
zairon Moderator 12. Apr 2007	Phiber: don't trust everything you read.
deroko 12. Apr 2007	I can't resist :) Especially not to kaspersky :)
LaFarge 17. Apr 2007	Man, i really wonder when will ppl realize that those packed files are NOT VIRUSES !!! AV soft fucks up with those.

TheAifam5's Excepted

Download CrackMe.zip, 5 kb (password: crackmes.de)
Browse contents of CrackMe.zip

1. Bypass anti-debug system
2. Find the password

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 25. Aug, 2016
Downloads: 195

Rating

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Solutions

Solution by acruel, published 20. oct, 2016; download (890 b), password: crackmes.de or browse.

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Discussion and comments

acruel 05. Sep, 04:12	Just posted a solution, unexpectedly.
donnie 05. Sep, 16:13	Found the password fairly easily. Couple of anti-debug tricks whose bad-boy jumps can be nopped.

TheBigMan's C-Crackme #6

Download crackme6.zip, 5 kb (password: crackmes.de)
Browse contents of crackme6.zip

I wrote this ca. 1 1/2 years ago and i never put it online ... It\'s quite easy. Have Fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 25. Nov, 2004
Downloads: 1622

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Solutions

Solution by haggar, published 07. dec, 2004; download (53 kb), password: crackmes.de or browse.

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thechaos's CrackMe #4

Download CrackMe.zip, 1 kb (password: crackmes.de)
Browse contents of CrackMe.zip

See for yourself...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 08. Sep, 2009
Downloads: 403

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Solutions

Solution by Vallani, published 11. sep, 2009; download (1 kb), password: crackmes.de or browse.

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Solution by wantondamage, published 11. sep, 2009; download (353 b), password: crackmes.de or browse.

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Solution by dMNt, published 11. sep, 2009; download (623 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

wantondamage 08. Sep 2009	got the password in less than 1 minute ! solution to be submitted

thechaos's CrackMe #5

Download CrackMe_5.zip, 2 kb (password: crackmes.de)
Browse contents of CrackMe_5.zip

See for yourself...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 08. Sep, 2009
Downloads: 334

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Solutions

Solution by Vallani, published 11. sep, 2009; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

Vallani 08. Sep 2009	ok, did it. serial f.e.: 0925-1833-1320 Thanks for crackme. I'll write a short text solution. Greetings Vallani

thechaos's CrackMe #6

Download CrackMe_v6.zip, 1 kb (password: crackmes.de)
Browse contents of CrackMe_v6.zip

See for yourself.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 08. Sep, 2009
Downloads: 518

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Solutions

Solution by Vallani, published 11. sep, 2009; download (2 kb), password: crackmes.de or browse.

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Solution by _MMx_, published 11. sep, 2009; download (459 b), password: crackmes.de or browse.

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Discussion and comments

Vallani 08. Sep 2009	Thanks for CrackMe, was nice to solve it. Nevertheless I think it's a eventually a bit too easy for Level 4. md5 of pass is: 8391291afacf90ba3d3ba22c0bac297e I'll write a little solution. Greetings Vallani

thecipher's IcantDoThis

Download crackthis.zip, 7 kb (password: crackmes.de)
Browse contents of crackthis.zip

Hi there,

This was given to me by one of my friends... I know for sure that it is a modified UPX and I am relatively new to this .. In fact I know nothing in reverse engineering.. I am just exploring my probabilities here. Tats about it. This was given to him as an assignment but the deadline is long gone and i am trying to break my head on it. Anyone out there... if you can let me know as to how to go about unpacking this .. u wud be my greek god.

Thanks

P.S. As I told you I am new to this. Detailed info on how to unpack this adn teh tools used... would bring a smile on my face.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 25. Mar, 2006
Downloads: 1060

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Solutions

Solution by Ank83, published 31. mar, 2006; download (12 kb), password: crackmes.de or browse.

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Solution by red477, published 31. mar, 2006; download (23 kb), password: crackmes.de or browse.

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Send a message to TheColonial »

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Discussion and comments

znycuk 25. Mar 2006	What do we have to do with this binary ? I think i've not really undestood the purpose of this one... just found : "This IS the message: '- Blowfish rulez, don't you think? ;-P'" without the quotes.
Ank83 26. Mar 2006	Hi. I think that all we have to do is pop up the good message. That would be patching. If that is the point of this crackme it's damn too easy. To moderators: Come on post the 6 crackme's ! Waitng a hole week. Best Regards Ank83
l0calh0st 26. Mar 2006	What's the purpose?..Only finding the message?..then it's too easy :P
Caleb 26. Mar 2006	Basically what this does is first decrypt the good message, then encrypt it again, and then show the bad message. So all you have to do is patch at two locations: (1) Skip over the encryption routine (2) Patch the arguments to the printf() call to have the offset of the good message instead of the bad one. Unpacking this was pretty easy (even though I'm a noob too). After unpacking you dump the full memory image with LordPE, then fix imports with ImpRec (the imports are ordinal only - without function names - so you'd have to give ImpRec the RVA and size yourself).
si1ent 26. Mar 2006	Hi, I'm new in reverse engineering, and I would be glad for every hint on this crackme. Maybe it's very an very easy one, but can't you also submit a tutorial? I only get the message "This is NOT the message"... But I've no idea, how to crack this with OllyDebug (new tool for me). I can't find the output string, I can't find a call to 'printf' and none to 'int 21h' for output, so I have no idea how to start cracking this crackme. Thank you for any help :-) Best Regards si1ent
Ank83 26. Mar 2006	Hi si1ent All you need to do to see the good message is put break point some lines above the print and you will see it. And if you want to patch it - all you need to do is put a jump when the good message is decrypted to print. Hope u understand me ! I think I will stay out of this ! Give a little chanse for the totaly newbies. Best Regards Ank83
si1ent 27. Mar 2006	Hi Ank83, thank you for your reply!I'm afraid my problem is less patching the crackme than working with ollydbg: I can't find any call to printf! Can anybody give me a short description how to find this function-call in this crackme? Is it wrong to search in the "CPU-main thread"-Window? Is it possible, that some user-settings are wrong? Thank you very much and best regards si1ent
HMX0101 27. Mar 2006	Hi, the good message is encrypted into the bad boy message for show the good message you need to patch a jump and changes two bytes :)
code_inside 27. Mar 2006	I think that si1ent wants to unpack the CrackMe first... ;)
si1ent 27. Mar 2006	@code_inside: funny ;-) I do: 1) unzip the crackme 2) open it with ollydbg 3) my question: what do I have to do to find the call to printf? right-click->search for->Name in current module? No success. Maybe somebody can post a screenshot or the address of this function call?! For example in 'CrackMe by ScR1pT' I searched (successfully) for 'vbaStrCmp'. But theres no result for 'printf' in this crackme here. Sorry for annoying you all!
l0calh0st 27. Mar 2006	You need to unpack the file first...It's different from unzipping :).........I dont want to spoil the fun.....So try to do it yourself or study some basic tecniques from here http://jbfonline.net/sndtuts
si1ent 27. Mar 2006	ok, thank you for the hint. In the meantime I found the solution for 'junky#1.exe by HMX0101' where unpacking is illustrated. And now I know that it wasn't a joke by code_inside to unpack the crackme first. @code_inside: sorry :-) I wrote that I'm new in reverse engineering (newbie). In this discussion, everybody says how simple this crackme is, but why doesn't anybody write a tutorial for this one, according to the FAQ 'What do I write in a solution?:The main goal of this site is to give newbies [like me :-)] a way to learn'. Ok, thank you very much for the your answers and sorry for annoying you, best regards si1ent
Ank83 27. Mar 2006	Hi si1ent l0calh0st was right. Unpacking exe is diffrent from unpacking zip, rar, ace e.t.c. But I suggest that u start with automatic unpackers - application that automaticly unpack the exe file. All you have to know is with wich packer is the target packed. You will know that with PEID 0.93 (the most popular). Then you will search on google.com for automatic unpacker for that packer. And so on ... I think in this case the job will be done with Quick Unpack v. 1.0 - unpacker for many packers. You can download it from http://ahteam.org/oursoft.html?do=view&prgid=qunpack l0calh0st: That's a nice site you have there ! By the way is anyone on this site from Great Britan ? Best Regards Ank83
l0calh0st 27. Mar 2006	I know it's quite annoying for newbies to unpack at starting...but after you read some tuts and try some targets you'll come to know the tricks..i have learnt many things only from here by searching some easy targets and working them out..it's good to try the solved targets first..it will help you
code_inside 27. Mar 2006	si1ent, Hahaha, that was a cool reply :D I think I needed to be more precise, but now you know about it ;)
si1ent 27. Mar 2006	:-) thank you for the help and short descriptions! @code_inside: with hindsight my reply seems to be a classical newbie reply. shit happens ;-) have a nice week, si1ent
MulleDK13 30. Nov 2008	Yay.... Easy one xD

TheColonial's TheColonial's KeygenMe01 (x64)

Download TheColonial_KeygenMe01_Winx64.zip, 8 kb (password: crackmes.de)
Browse contents of TheColonial_KeygenMe01_Winx64.zip

Hello Reversers,

First of all THIS IS FOR WINDOWS X64 ONLY!

This is the first KeygenMe I've ever written. The intention was for me to play with some ideas, learn something along the way AND hopefully be the first to write a KeygenMe specific to 64-bit editions of Windows. This is the result. It's far from rocket science, and I'm sure there's nothing here that you haven't seen before. I do hope you enjoy breaking it into tiny pieces! Patching is a piece of cake, and isn't the intention of this KeygenMe, so please don't bother submitting a patch solution.

As I said, this is my first, so be gentle with me :)

If you manage to reverse it, I'd love to hear from you. Please submit your tutorials, discussions and key generators to the Crackmes website, and send them to me too at thecolonial@gmail.com

Cheers!

Info:
Language: C/C++ using Visual Studio 2005 with SP1
Platform: Windows x64 only.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 05. Mar, 2007
Downloads: 332

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Discussion and comments

TheColonial Author 27. Mar 2007	So, 62 downloads to date, and no discussion? Bummer. How many 64-bit Windows users do we have here? :)

thefool's Thefools crackme - lvl5

Download thefools_crackme_-_part_5.zip, 6 kb (password: crackmes.de)
Browse contents of thefools_crackme_-_part_5.zip

My first self modifying crackme. Its not very protected, so try it out :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 16. Nov, 2005
Downloads: 776

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Solutions

Solution by ultrasound, published 17. nov, 2005; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

thefool Author 16. Nov 2005	After thinking its probably more likely a level 3 than a level 4 but try :)
ultrasound 16. Nov 2005	solution submitted :)
thefool Author 16. Nov 2005	nice :) Now i can begin programming number 6! when i have confirmed the solution of course.. How do you think it was.. Should it be rated as 4, 3 or even 2?
ultrasound 17. Nov 2005	I would recommend 2 for this crackme, although ill reserve judgement for acceptance of my solution, incase the prog does something else that i did not notice!
thefool Author 17. Nov 2005	ok thx.. Let me see the patch when it gets approved :) And you of course didnt just patch the fake code? I mean, someone on another forum did thinking that he cracked it :D
ultrasound 17. Nov 2005	i made it so that any password can be used, is that the aim?
thefool Author 17. Nov 2005	yes you did it correctly. I guess it should have been set as 2 instead of 4 whatever i wansnt sure..
thefool Author 17. Nov 2005	hoh i see what i did wrong :) It is self modifying, but of course after you have executed it, its not anymore! damn.. next one i promise will be harder! this was my first crackme (ehm lvl 5 i just made from 1-4 to myself heh)
thefool Author 18. Nov 2005	thanks to the one who changed it :)

TheFoX's Crackme #2

Download crackme2.zip, 9 kb (password: crackmes.de)
Browse contents of crackme2.zip

Simple name+serial crackme with nothing special ;)

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Jul, 2002
Downloads: 1956

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Solutions

Solution by sonkite, published 27. dec, 2002; download (3 kb), password: crackmes.de or browse.

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Solution by ^L00P, published 02. sep, 2002; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

thegreatone2176's breakpoint me

Download crackmevb.zip, 7 kb (password: crackmes.de)
Browse contents of crackmevb.zip

needs breakpoints in a few right places

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 17. Dec, 2004
Downloads: 767

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Solutions

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Discussion and comments

Discussion and comments

Rapido 23. Feb 2009	no solution? this is not cracked yet!
DigitalAcid 23. Feb 2009	Hmm, i'll take a look into this then :).
Zaphod 26. Feb 2009	I, too, would like to see a solution for this one...
DigitalAcid 26. Feb 2009	Wasn't this one solved before ? Or maybe there is a similar crackme with a solution...

thehyper's HyperCrackMe6

Download HyperCrackMe6.zip, 12 kb (password: crackmes.de)
Browse contents of HyperCrackMe6.zip

Slightly encrypted serial based crackme
Writing a keygen should be easy!

tested only on Windows XP. Should work on 2000/98 etc."

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 12. May, 2005
Downloads: 1013

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Solutions

Solution by Knight, published 11. jun, 2005; download (19 kb), password: crackmes.de or browse.

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Discussion and comments

haggar 17. May 2005	Anybody had luck with this one? I know how crackme takes serial and one part of crackme can be decrypted while doing that, but I have no clue what is doing with serial. Also there is one exception which I don't know purpose.
Knight 26. May 2005	haggar here's hint for u: Put bp on GetClipboardData, then put hardware bp on buffer where clipboard data is stored. Then u get to correct place.
TQN 27. May 2005	I agree, Knight. It is a only way to find the serial check code block. I have solved it.
thehyper Author 27. May 2005	brilliant! Good job TQN! I guess it was not that hard :)
haggar 27. May 2005	Yes, I sow that crackme uses clipboard to colect serial, but I just can't findout what is doing with serial. Tried mem bp and hardware , but I couldn't catch anything. Well, if I don't dig it, I'll read it in your solutions guys ;)
TQN 05. Jun 2005	Sorry haggar, I feel lazy to write a English solution.

thehyper's HyperCrackMe7

Download HyperCrackMe7.zip, 18 kb (password: crackmes.de)
Browse contents of HyperCrackMe7.zip

Hi,

This is a level 3-4 crackme. This crackme will work properly only on windows 2000/xp.

No patching. Brute force is allowed if there is no alternative. Try writing a generic keygen.

TheHyper

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 24. Nov, 2005
Downloads: 560

Rating

Votes: 3
Crackme is quite bad.

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Solutions

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Discussion and comments

thehyper Author 26. Nov 2005	Does anyone want a hint?
HMX0101 26. Nov 2005	the name of the keyfile is HyperCrackMe7.key i try to trace it, and my WinXP/Sp2 crash, why?
HMX0101 26. Nov 2005	in this crackme exists a method, "TheHyperSurprise", this method hide the desktop
thehyper Author 28. Nov 2005	It doesn't hide the desktop :) it creates a new desktop and switches to it. before exit, it switches back to the orginal desktop. If u are debugging, and if my crackme catches you, then the program will crash and u cannot switch back to the orginal desktop. :)
HMX0101 28. Nov 2005	ahhhhh, but while is tracing the crackme this crash
thehyper Author 29. Nov 2005	do u mean to say windows xp/sp2 crash? i have windows/sp2 but no crash on my system. does anyone else have a problem with this crackme?
thehyper Author 29. Nov 2005	hint: me8 ?? okay length of name <=8 serial is 8 bytes
haggar 04. Dec 2005	This is nice crackme, but I can't solve it. Desktop is minor anoyance, easy to patch, debugger check too, but making keyfile for hardware profile and :key is little hard for me.
haggar 05. Dec 2005	In order to see what is going on, I cracked me8.exe to acept any hash and false keyfile. I stuck on GoodCracker.exe, HyperCrackme7.exe doesn't want to write exe data to GoodCrackme.exe. I wonder why. Maybe I'll try to keygen hash algo, it doesn't seam to easy.
haggar 30. Jan 2006	I bruted that hash algo. Problem is that for my name I get numerous valid serials and that means 32byte hash too ?! hardware reg key: "{819e5dc0-3d5e-11d9-b8f8-806d6172696f}" name : "-haggar-" couple serials: 156ACA2@ 156ACC0@ 156CAA2@ Am I doing something wrong ?!
haggar 30. Jan 2006	PS HyperCrackme7.exe_key has this inside -haggar-156ACA2@ which passes serial check.

thehyper's HyperUnpackMe1

Download HyperUnpackMe1.zip, 42 kb (password: crackmes.de)
Browse contents of HyperUnpackMe1.zip

HyperUnpackMe1
+++++++++++

HyperUnpackMe1 is a notepad protected with my protector.

Your job is to unpack it. The protector is still in development so I have not included any anti-debugging tricks,etc

Happy unpacking!!!!!

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: C/C++

Published: 28. Mar, 2006
Downloads: 936

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by haggar, published 31. mar, 2006; download (62 kb), password: crackmes.de or browse.

haggar has rated this crackme as quite nice.

Solution by deroko, published 31. mar, 2006; download (71 kb), password: crackmes.de or browse.

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Discussion and comments

kao 29. Mar 2006	Really cool stuff! :)) I can't wait to get a version with all anti-something tricks inside!
Scortile 29. Mar 2006	How come sometimes, such in this unpackme, olly gets real slow while tracing?
deroko 29. Mar 2006	nice, one, I'll probably write solution for this one, anyway good crackme =)
code_inside 30. Mar 2006	Nice CrackMe :)
3dmonkey3000 30. Mar 2006	I think i know how 2 do this one..
deroko 30. Mar 2006	it wasn't that hard to unpack and fix, yep, it required some home made tools to be used but it was enjoyable unpacking =)
haggar 30. Mar 2006	Unpacked, just need to test it on other machine. IAT was pain in the ass problem :)
acidflash 31. Mar 2006	man I have lots to learn; Nice work deroko :) You wrote a very helpfull tutorial :)
deroko 31. Mar 2006	tnx, I'm glad you like it =)
winndy 01. Apr 2006	To deroko: It crashed. OS:winXP SP2 Chinese and dumped4.exe is detected by Mcafee as virus.
deroko 01. Apr 2006	of course, because there is loader for apis in last section, that's why AVs will generate false positive.

thehyper's HyperUnpackMe2

Download HyperUnpackMe2.zip, 102 kb (password: crackmes.de)
Browse contents of HyperUnpackMe2.zip

HyperUnpackMe2
++++++++++++++++

You must unpack a protected notepad executable

I have added some cool anti-debugging tricks :D

Will work only on Windows XP

Enjoy!

Difficulty: 5 - Professional problem to solve
Platform: Windows 2000/XP only
Language: C/C++

Published: 19. Jun, 2006
Downloads: 2827

Rating

Votes: 4
Crackme is good.

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Solutions

Solution by Rolf.Rolles, published 19. aug, 2006; download (807 kb), password: crackmes.de or browse.

Rolf.Rolles has rated this crackme as quite nice.

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Discussion and comments

Shism 06. Jun 2006	Umm the program crashes..... and I ran it normally. on xp sp1
Shism 07. Jun 2006	Ya it just crashes....
kao 08. Jun 2006	Crash confirmed on XP Pro SP1 English. Does not matter which is parent process - it just crashes. Exception information Code: 0xc0000005 Address: 0x01049B8B
acidflash 08. Jun 2006	Runs fine here, XP SP2 w/ up to date patches. (US/English)
TFB 09. Jun 2006	Crackme does not work on Windows XP SP2
megadoctor 18. Jun 2006	nope still crashes on my WinXp SP2 :(
thehyper Author 18. Jun 2006	megadoctor, what is the address of the exception and does it crash before or after or during the desktop switch?
thehyper Author 19. Jun 2006	all bugs are fixed. it will run on all versions of xp. those who had the earlier hyperunpackme2 should download this file. i have removed the nasty bsod. if it still crashes, pls read the above comment. If you get 'system freeze', i hope that you can figure how to get out of it without restarting. HyperUnpackMe2 is not easy. first timers can check out the solutions to my first unpackme. Enjoy ;)
thehyper Author 20. Jun 2006	I guess there is no one good enough to unpack HyperUnpackMe2!!! lol ;P
deroko 21. Jun 2006	I guess there is someone good enough to unpack it :P but no solution this time, to lazy to write it :P check dumped file at arteam forum :P
FireBig 21. Jun 2006	it's so hard 2me...could u write something about it?please...
Shism 22. Jun 2006	Still crashes on my computer
thehyper Author 23. Jun 2006	runs on sp2 only.
h0ard 24. Jun 2006	oh thats easy.. ItÂ´s got 2 MZ's so it are joined files ,not encrypted, have extracted in 10 minutez
EvOlUtIoN 01. Jul 2006	it seems to be very difficult... I have WinXP sp2 and the program works fine. But there is no way to open it or attach with any debugger, very strange! I think it opens another process with different protection settings, because before open the program wait a lot of time and does some strnge things...
deroko 02. Jul 2006	it doesn't open new process. little delay is caused by VM since whole protection goes trough virtual machine.
EvOlUtIoN 05. Jul 2006	OK thanks deroko! ;-) We wait for your solution!
Rolf.Rolles 29. Apr 2007	Instead of downloading my solution from here, you ought to get the one from http://www.openrce.org/articles/full_view/28. That one is re-written and it includes a section on coding processor modules, plus the full processor module source code.
zairon Moderator 30. Apr 2007	Rolf.Rolles, can you upload the new solution here too?

themoon's mmx crackme

Download dnx_mmx.zip, 3 kb (password: crackmes.de)
Browse contents of dnx_mmx.zip

serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. May, 2001
Downloads: 1309

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Solutions

Solution by lucifer48, published 02. may, 2001; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

newbie_olly 22. Dec 2012	This is a Trojan
haggar 23. Dec 2012	How do you know that?

thePCdepp's kgm no1

Download thepcdepp_kgm_no1.zip, 43 kb (password: crackmes.de)
Browse contents of thepcdepp_kgm_no1.zip

hokay homiez, so this should be pretty straightforward, no antidebugging, get to the keycheck via the usual GetWindowText reference, and a nice ass keycheck routine written in hand-written assembly for your convenience, so no pain there, but writing a proper keygen might prove a little bit nifty.

valid solution is a keygen that generates valid keys for any given name. it is absolutely not necessary to rip any code. the keys will look kinda whack but that's okay, this aint no beauty contest.

a version of the keygenme with the actual keygen included is included, so yall can see that this kgm aint no non-working bullshit. disassembling the keygen kinda defies the whole point of solving a keygenme, so if you do, you must be kinda dum or somethin.

peace out negus

thePCdepp

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 31. May, 2012
Downloads: 404

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Solutions

Solution by promix17, published 02. jun, 2012; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

promix17 31. May 2012	Name: Promix17 Serial: <FK,FKe8FKe4FK Wait a tutorial
lovejoy226 20. Jun 2012	Hello promix17. I understand your peseudocode of the tutorial but not completely. and I couldn't understand your c++ code also completely. but I think it's a nice work of yours. thanks for your submitting a solution.
cdx_net 09. Jul 2012	you can patch this program by set EAX=0 I can not wirte a Keymaker, but the register call returns the result by EAX, so if we modify EAX=0, any Serial will be ok! 00401235 \|. E8 16FEFFFF CALL kgm.00401050 ; \kgm.00401050 0040123A \|. 83C4 08 ADD ESP,8 0040123D \|. 85C0 TEST EAX,EAX
cdx_net 09. Jul 2012	Hope some one can provide a keymaker, and teach us how to wirte a keymaker. thank you!
cdx_net 09. Jul 2012	Has read Promix17's Tutorial, it's really very good. thanks

the+q's magic

Download magic.zip, 1 kb (password: crackmes.de)
Browse contents of magic.zip

write a program to recognize english pla...

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 21. Jun, 2001
Downloads: 1788

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Solutions

Solution by lucifer48, published 21. jun, 2001; download (16 kb), password: crackmes.de or browse.

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Solutions

Send a message to therapy »

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Solutions

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Solutions

Solution by s_u_n_r_i_x, published 23. sep, 2015; download (341 b), password: crackmes.de or browse.

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Solution by fdjkf, published 23. sep, 2015; download (1 kb), password: crackmes.de or browse.

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Solution by acruel, published 07. aug, 2015; download (1 kb), password: crackmes.de or browse.

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Solution by klefz, published 07. aug, 2015; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

ritka 31. Jul 2015	done in one second by guessing the password
kavukata 04. Aug 2015	Simple and easy ! Cool for newbies like me ! lol
jockcranley 08. Aug 2015	Easy as pie, takes 5 seconds max for anyone who is familiar with RE. Be reasonably good for someone completely new to it.
P$N4PPZ 09. Aug 2015	Easy crack I got in very easily ;P I'M IN !!!
o0xmuhe 16. Aug 2015	too easy...LOL just use IDA..

TheUnknownProgrammer's Crackme/Keygenme

Download Crackme.zip, 43 kb (password: crackmes.de)
Browse contents of Crackme.zip

This is a crackme/keygenme written in a .net language. Don't think immediately, .net is bad and easy. This crackme might actually take a little bit more knowledge than you'd expect.

No serial fishing is allowed. Patching is ok, but creating the keygen is the perfect solution.

Good luck !

Regards
TheUnknownProgrammer

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: .NET

Published: 27. Mar, 2013
Downloads: 389

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Solutions

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Discussion and comments

loizos 31. Mar 2013	I'll try it ,I'll have you updated :)
TheUnknownProgrammer Author 16. Apr 2013	Still no luck everybody? :D
HellCracks 01. Aug 2013	I gave up. I failed at the first part ._. Don't know what to do with the decrypted Form. By the way, are you the same guy who made the DotNetResolver?
TheUnknownProgrammer Author 28. Jan 2014	Yes I am :3 Too bad you weren't able to crack it, well at least you tried =D.
jacanosalado 05. Jan, 00:19	Yayyy, I nailed it, spent two nights on this one. It was hard and fun on equal terms. keygen: static void Main(string[] args) { var name = "jacanosalado"; var reverseNameInHex = string.Join(string.Empty, name.Reverse().Select(c => string.Format("{0:X2}", Convert.ToInt32(c)))); var serial = Convert.ToBase64String(ASCIIEncoding.ASCII.GetBytes(reverseNameInHex)); Console.WriteLine("name: {0}", name); Console.WriteLine("serial: {0}", serial); } name: jacanosalado serial: NkY2NDYxNkM2MTczNkY2RTYxNjM2MTZB Hope I had some time to write a nice tutorial. This crackme really deserves it :D
apuromafo 08. Jan, 04:39	i was open in de4dot, in the fix checked the dnspy there have antidebug?-> this apis was called. CloseHandle IsDebuggerPresent OutputDebugStringA GetModuleHandle GetProcAdress VirtualProtect i was open in ollydbg and checked the apis work fine with snd 2.3 of lcf. by other side jacanosalado was solved nice: here work fine your name/serial/keygen --------------------------- Crackme --------------------------- Program has been registered succesfully! --------------------------- Aceptar ---------------------------

Thewizard's Crackme #1

Download Crackme_#1.zip, 7 kb (password: crackmes.de)
Browse contents of Crackme_#1.zip

Find the correct serial number (only numeric)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 29. Jun, 2005
Downloads: 844

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Solutions

Solution by ap0x, published 30. jun, 2005; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

the_alemao's Crackme - Very hard

Download crackme-get-key.zip, 234 kb (password: crackmes.de)
Browse contents of crackme-get-key.zip

get the serial.

please, post the solution..

no patch: anti tracer and checksum! :P

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 27. Sep, 2008
Downloads: 537

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by JoKa, published 30. sep, 2008; download (2 kb), password: crackmes.de or browse.

JoKa has rated this crackme as nothing special.

Solution by DeepBlueSea, published 30. sep, 2008; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

HMX0101 28. Sep 2008	This crackme is overrated!.. just some anti's and some SMC.. but the serial comparation is direct... so its easy as hell ;p
the_alemao Author 29. Sep 2008	post the solution ??? ok, please.. ;P
DeepBlueSea 29. Sep 2008	Solution submitted. I agree with HMX0101. Difficulty 2 or 3 at max.
the_alemao Author 30. Sep 2008	HMX0101 nice, xD, post how make please!
the_alemao Author 30. Sep 2008	DeepBlueSea "Submit your solution »" please friend. =D
DeepBlueSea 30. Sep 2008	I did submit it already! Look on your left. "5 solutions in queue" Solutions have to be reviewed by moderators first.
the_alemao Author 30. Sep 2008	JoKa and DeepBlueSea, nices, good work xD

The Binary Auditor's The Binary Auditor™ - File Format Exercise

Download File_Format_Exercise.zip, 4 kb (password: crackmes.de)
Browse contents of File_Format_Exercise.zip

Crudd's Forward Me

Well, here's my newest reverse me. Actually, its kinda reversed already. Guess whut that means you have to do. Thats right, put it all together and make a working PE file. It shouldnt be too hard for seasoned reversers and will be a good learnig experience for the rest of us.

Things you'll need to do:
Add/Create the Dos Stub/PE Header
Figure out which section is which
Put it all together, and make it run

Crackme designed by Crudd

Difficulty: 2 - Needs a little brain (or luck)
Platform: The Binary Auditor
Language: Assembler

Published: 21. Aug, 2010
Downloads: 329

Rating

Votes: 3
Crackme is good.

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Solutions

Solution by tomkol, published 31. aug, 2013; download (51 kb), password: crackmes.de or browse.

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Solution by sghctoma, published 10. sep, 2010; download (17 kb), password: crackmes.de or browse.

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Solution by onepatop, published 23. sep, 2010; download (1046 kb), password: crackmes.de or browse.

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Discussion and comments

freesoul
22. Aug 2010

As a hint: have careful with the data section... which is it's real RVA? :P
You can find 00 20 40 00 at the start of it.. but if you study a bit the code section you can find:

00401400 |. 6A 00 PUSH 0
00401402 |. 68 38304000 PUSH Loader_B.00403038 ; <- :O
00401407 |. FF75 F4 PUSH DWORD PTR SS:[EBP-C]
0040140A |. FF75 08 PUSH DWORD PTR SS:[EBP+8]
0040140D |. E8 FA000000 CALL Loader_B.0040150C
00401412 |> 5F POP EDI

which look a messagebox call :P

The Binary Auditor
Author
24. Aug 2010

Please do not give do many hints ;) Let people struggle with it :)

The Binary Auditor's The Binary Auditor™ - Splish 1

Download Splish.exe.zip, 30 kb (password: crackmes.de)
Browse contents of Splish.exe.zip

This is a very easy crackme. All you need to do is to reverse the crackme and to find a working serial for your name. You need to provide a keygen to get an accepted solution!

Difficulty: 1 - Very easy, for newbies
Platform: The Binary Auditor
Language: Assembler

Published: 21. Aug, 2010
Downloads: 415

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by hasherezade, published 24. aug, 2010; download (382 kb), password: crackmes.de or browse.

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Solution by tomkol, published 31. aug, 2013; download (54 kb), password: crackmes.de or browse.

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Discussion and comments

tomkol 22. Aug 2010	Nice old crackme back from old good REA. It was nice to solve it once again. Waiting for more challenges from REA.
Lone.Wolf 24. Aug 2010	any 20 byte serial will do the job ;)
Lone.Wolf 24. Aug 2010	i want to correct my previous statement: there is a buffer overflow and code-duplication (serial code -> name code, thanks to that great serial-code generator xD) when a serial-buffer > 11 bytes is inserted. to get the good boy message, the name buffer must be smaller-equal to (serial-buffer-length-11) because only (name-buffer-length) digits of the both calculated codes will be checked example: Name "ABC" Serial "12345678901ABC" (thanks to that .."ABC" 3 bytes of the code generated for the serial will be written to the name-code (it gets overflowed xD).
The Binary Auditor Author 24. Aug 2010	@tomkol: I will publish ALL of them, but step by step. I promise it gets harder and harder during the next weeks!
tomkol 24. Aug 2010	Can't wait to see harder. Will focus on published now.
johnnycannuk 25. Aug 2010	Hmmm...still working on it but odd twist - Immunity crashes trying to open this when running in an XP VM (Fusion 3.1 on MacBook Pro 64 OSX 10.6) Ok., back to the old Windows box

The Binary Auditor's The Binary Auditor™ - Splish 2

Download SplishSplash.exe.zip, 29 kb (password: crackmes.de)
Browse contents of SplishSplash.exe.zip

Splish 2 is a recode of Splish 1. It is coded in MASM and has a slightly different algorithm for name/serial inside. Hardcoded serial is different as well!

Difficulty: 1 - Very easy, for newbies
Platform: The Binary Auditor
Language: Assembler

Published: 21. Aug, 2010
Downloads: 563

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by hasherezade, published 26. aug, 2010; download (473 kb), password: crackmes.de or browse.

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Solution by tomkol, published 31. aug, 2013; download (52 kb), password: crackmes.de or browse.

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Solution by Klaria, published 24. aug, 2010; download (122 kb), password: crackmes.de or browse.

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Discussion and comments

tomkol 22. Aug 2010	It was fun to again solve this nice crackme. Waiting for others from old REA challenges.
r-Evolution 30. Aug 2010	it was fun to solve this one thanks solution in progress
r-Evolution 30. Aug 2010	wow couldn't upload the solution damn it is really analysed for newbies
owl1 01. Sep 2010	I guess I was kind of late too to submit solutions. Oh, well maybe next time.
H2SO4 27. Oct 2010	Yeah! I did it. But I'm a noob, with succes: User: H2SO4 Pass: 72080

the_dux's vxd crackme

Download the_dux_vxdcrk.zip, 10 kb (password: crackmes.de)
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name/serial. protection's inside the vxd

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Aug, 2001
Downloads: 1215

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Solutions

Solution by sphinx, published 30. aug, 2001; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

The french beginner's Crackme 1.1

Download Crackme1.1.zip, 25 kb (password: crackmes.de)
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Hi, this is my first crackme!
You just have to find the good serial...
The only limitation is : no bruteforcing!!

If you solve it, please send a little tutorial.
Thanks!

Good luck! and I hope good entertainment too ;-)

The french beginner

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 18. Jun, 2006
Downloads: 618

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Solutions

Solution by pseudonym, published 08. jul, 2006; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

pseudonym 30. Jun 2006	Well, I've cracked a couple of other Level 1s, but this was pretty hard I think. I'll get my solution up soon.

the hellfish's braincrack

Download braincrack.zip, 168 kb (password: crackmes.de)
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serial

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. May, 2001
Downloads: 1609

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Solutions

Solution by cw_, published 26. may, 2001; download (3 kb), password: crackmes.de or browse.

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Solution by tscube, published 26. may, 2001; download (35 kb), password: crackmes.de or browse.

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Solution by sphinx, published 26. may, 2001; download (5 kb), password: crackmes.de or browse.

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the hellfish's hellcrackme 2

Download hellcrackme_2.zip, 172 kb (password: crackmes.de)
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delphi. nag + name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Borland Delphi

Published: 12. Apr, 2001
Downloads: 1525

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Solutions

Solution by pincopall, published 12. apr, 2001; download (103 kb), password: crackmes.de or browse.

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Solution by sphinx, published 12. apr, 2001; download (6 kb), password: crackmes.de or browse.

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the hoax's keygenme 1

Download dhx_keygenme1.zip, 34 kb (password: crackmes.de)
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RSA 200

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Jun, 2003
Downloads: 1452

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Solutions

Solution by Encrypto, published 22. mar, 2008; download (54 kb), password: crackmes.de or browse.

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Solution by boonz, published 18. mar, 2007; download (88 kb), password: crackmes.de or browse.

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Solution by bundy, published 20. jul, 2003; download (31 kb), password: crackmes.de or browse.

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Discussion and comments

the hoax
Author
09. Nov 2006

good solution bundy :) This crackme has been solved in many different ways(over 3 years till now), and as far as I've seen you're the only one who saw that 4919 serials are valid for each name.

allko
03. Jul 2007

i have a question...

both solution states that this function

401161 PUSH 0
401163 PUSH DWORD PTR DS:[40441D]
401169 PUSH EAX
40116A PUSH DWORD PTR DS:[404421]
401170 CALL keygenme.00401D27

Divides C (crypted massege) by 1337

but how did you know that ??

In Addition , it seems to be not a division coz i have divided it by a calculator and the result wasn't right...
I copyed C from ollyDBG - with little endian taken into consideration - and divide it by 1337 and the result isn't the same !!!

any ideaz ???

the hoax's keygenme 2

Download dhx_keygenme_2.zip, 46 kb (password: crackmes.de)
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Some crypto, some math, some fun. Have a nice one.

- dihux // 2009

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Assembler

Published: 06. Jul, 2009
Downloads: 588

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by Encrypto, published 09. jul, 2009; download (247 kb), password: crackmes.de or browse.

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Solution by andrewl.us, published 09. jul, 2009; download (42 kb), password: crackmes.de or browse.

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Solution by KernelJ, published 09. jul, 2009; download (19 kb), password: crackmes.de or browse.

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Discussion and comments

KernelJ 06. Jul 2009	finally a new keygen with a difficulty rating above 2 that actually runs. I shall solve it now...
Numernia Moderator 06. Jul 2009	good one, thanks dihux
KernelJ 07. Jul 2009	Well I found the product key. Last block doesn't seem to have much restriction... Still have to do the second part of the keygenme, well the actual keygenme part!
the hoax Author 07. Jul 2009	Thank you Numernia
KernelJ 08. Jul 2009	The number of valid activation codes has 35 digits. My keygen will (eventually) tell you 100% of these but not all of them. Except it will never be able to tell you that many. lol
KernelJ 08. Jul 2009	actually no, it can only be around 16 digits because of one of the restrictions I forgot about.
KernelJ 08. Jul 2009	bleh I mean 15 digits... can't count today
KernelJ 08. Jul 2009	Sorry base mix up. It is indeed 35 digits.
Encrypto 09. Jul 2009	very nice keygenme dihux :) I liked it a lot. I'll post my solution soon :)
HMX0101 09. Jul 2009	yea, nice one! I liked it too :P I won't post solution because I'm lazy hehehe :P btw, hi encrypto & numernia :D ltns guys :)
Encrypto 09. Jul 2009	hey hmx! ltns indeed man :) where the hell have you been :P dihux a very nice crackme. totally enjoyed it. posted my solution.. dont know if its any good :P my writing skills is about as good as my graphics. :D
the hoax Author 10. Jul 2009	Thanks guys. Good solution Encrypto :)
Encrypto 10. Jul 2009	thanks mate :) really taught me some stuff :D
KernelJ 10. Jul 2009	andrewl'us's solution has some really stupid mistakes in it however... Negation and division are different sir! Well I spent too much time in mine reversing what were clearly library functions, and I could tell because the small loops were nicely dword aligned and code was very efficiently written with no apparent errors... unlike the actual keygenme code!
simonzack Moderator 11. Jul 2009	@kernelJ: next time, just use something to scan what the library is and make a sig out of that, or just check out what the results are for the bignum pushed onto the stack generally they are like this: DWORD size INT* contents and mostly bigendian
KernelJ 11. Jul 2009	Of course I'd recognize the code easily if I saw it again. And you mean little endian. Who wrote that library anyway?
andrewl.us Moderator 11. Jul 2009	you can count on me for stupid mistakes :) it's modified biglib by roy\|fleur (like notice how the ExpMod() function has extra flag to instead be CubeMod())...Cauchy's CryptoSig matched most of it if I remember right
artif 18. Jul 2009	nice crackme and nice solutions but not only 62119 / FUNNY is valid : there is also 62YB4 / Abjdb, 6xd36 / IAtRn, mJkG2 / hK1A5, wfy94 / hZf35, ERaD3 / wZTx-, OPCh- / Gwiqf, TrF96 / H2aA7
artif 18. Jul 2009	so with that, you multiply again the randomness of the first key, see you

tHE mUTABLE's !Alpha.Zeta

Download !Alpha.Zeta.zip, 56 kb (password: crackmes.de)
Browse contents of !Alpha.Zeta.zip

This KeygenMe 'STiGmaTaMe [!Alpha.Zeta]' is a Proof of Concept. Its a new phase of digital instructions.

{ [What you should know: Embedded Features] }

- Name may consist of any character.
- Serial: Only numbers.
- A lot of Junk Code Insertion.
- Stealthy Behaviour [Anti Debugging(?!)].
- Encyption/Obfuscation Outer-Inner Shell (Basic-
Straight Forward)(?!).
- Doubly Psychotropic Effects.
- A Very Lengthy Operations.
- Hint: I Don't know If You Can Find a Correct Serial...
I hope So(?!).
- Not For Newbies (?!)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 12. Mar, 2007
Downloads: 484

Rating

Votes: 4
Crackme is good.

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Solutions

Solution by j00ru, published 30. apr, 2007; download (465 kb), password: crackmes.de or browse.

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Discussion and comments

j00ru 18. Mar 2007	Uhm I can see my msg was deleted ;< I think because of name/serial in it... Anyways, wery enjoyable crackme ;>

The_Rapture's CrackMe Extreme v1.0

Download CrackMe_Extreme_v1.0.zip.zip, 26 kb (password: crackmes.de)
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Amazingly simple .NET crack me, all you need are the right tools. There is no encryption, or protection of any kind. The valid serials are included with the crack me.

I plan on making a series of CrackMe Extremes as I learnt new protection methods and such. If you are interested on contributing to this ongoing series contact me at rapture@easypeasy.com (I have no plans on moving the series to any other programming language other than VB.NET

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 04. Sep, 2007
Downloads: 975

Rating

Votes: 7
Crackme is nothing special.

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Solutions

Solution by Wasted_Bytes, published 05. sep, 2007; download (243 kb), password: crackmes.de or browse.

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Solution by zart, published 05. sep, 2007; download (21 kb), password: crackmes.de or browse.

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Discussion and comments

The_Rapture Author 05. Sep 2007	I don't know how to protect programs from reflectors. If you know how, or you can make .NET crackmes harder then could you leave a comment here or something? Thanks in advance for your help
HEXiC 06. Sep 2007	smartcheck, or manual packing using olly.
The_Rapture Author 07. Sep 2007	smartcheck prevents harddrive failure and data loss, i saw it on google once. how does that help?
Wasted_Bytes 07. Sep 2007	.Net obfuscation
The_Rapture Author 08. Sep 2007	yeah ill try that, and then apply that to another crackme im working on. it wont be a serial crackme this time.
The_Rapture Author 09. Sep 2007	i've just obfuscated this one, so should i upload it in place of this one, or upload it as a totally different one.
Wasted_Bytes 09. Sep 2007	Apply the obsfuscation in the new crackme..To upload now this crackme obfuscated does not mean anything
jvwarrior 11. Apr 2008	That was amazingly easy. Thanks rapture! Im noob so these easy stuff help me get better and I actually learned a thing or 2 with this.
dknutson 19. Sep 2009	Yea jvwarrior i know what you mean. Im VERY new to this entire thing, im moderately proficient at C++ and im trying to learn PHP and Python... Hope to upload a crackme soon!

The_Rapture's The_Rapture's VB.NET Serial FishMe

Download VB.NET_serial_fishme_by_The_Rapture.zip, 8 kb (password: crackmes.de)
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This is a very basic serial fish me in VB.NET
Hints:
There is no protection
The serial is hardcoded
There are comments there that may throw you off
-End of Hints-
I also included the correct serial inside the .zip file, it might help you in understanding how it works. Good Luck.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 26. Aug, 2007
Downloads: 680

Rating

Votes: 6
Crackme is quite bad.

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Solutions

Solution by FIXER, published 11. sep, 2007; download (1 kb), password: crackmes.de or browse.

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Solution by zart, published 03. sep, 2007; download (8 kb), password: crackmes.de or browse.

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Solution by mcpower, published 03. sep, 2007; download (826 b), password: crackmes.de or browse.

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Discussion and comments

FIXER 10. Sep 2007	Meh, it was okay. Worth writing a tut for.
The_Rapture Author 10. Sep 2007	I'm glad you think that. Check out my other one. I have a keygen me waiting to be approved too.
TiGa 11. Sep 2007	Thank you all for your many submissions. No further solutions will be accepted.
jvwarrior 10. Apr 2008	OOOK eaaasy. Why was the serial in the file anyway? you made it kind of clear.
kampan 29. May 2015	very good crackme. guys, remember that this should be 'level 1'. ;) Thanks for ur work dude.

The So;X's Dos Crackme 2

Download The_So;X_Dos_Crackme#2.zip, 9 kb (password: crackmes.de)
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C-on where is my 1st dos crackme results

Difficulty: 4 - Needs special knowledge
Platform: DOS
Language: C/C++

Published: 27. Apr, 2008
Downloads: 413

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by asterix, published 02. oct, 2009; download (30 kb), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 27. Apr 2008	The semicolon does not allow us to download your file. This could be used as an exploit :O.
The So;X Author 28. Apr 2008	OK I read your problm I tried next time not to write ; sorry for your inconvinence Regards The So(semicolon)X
ZeroCoder 29. Apr 2008	easy ;) dos forever :))))))
Mathias 04. Jun 2009	Thanks for it but your first one was bit harder. MD5: 9D7311BA459F9E45ED746755A32DCD11

The So;X's Soxcrackme5

Download Soxcrackme5.zip, 67 kb (password: crackmes.de)
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Gift for all olly loving people please see inside

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 10. May, 2008
Downloads: 766

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Solutions

Solution by costy, published 05. jul, 2008; download (97 kb), password: crackmes.de or browse.

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Discussion and comments

MACH4 11. May 2008	Hi So;x Something seriously wrong with your algo! TextBox3 can't equal two different strings at the same time! And 4 & 5 are not used! Also creating run-time errors! MACH4
The So;X Author 12. May 2008	Ok i understand what u r trying to say .May be i need to recode again and reupload it again Thank you
MulleDK13 04. Jun 2008	Remove this, and ban author... "TextBox3 can't equal two different strings at the same time!"
costy 04. Jun 2008	Sorry... I have a question... How I can understand where is textbox1 or where is textbox2? I see 5 textboxes i don't know which of that is the first
costy 05. Jul 2008	I forgot to write in the solution how to remove the nag but it's simply... First look at this function. In any .NET crackme it decided witch form is loaded first. In this case form1. Protected Overrides Sub OnCreateMainForm() Me.MainForm = MyProject.Forms.Form1 End Sub Just modify in this way with Reflexil Protected Overrides Sub OnCreateMainForm() Me.MainForm = MyProject.Forms.Form2 <---- FORM2 End Sub That's all. Now Form2 is loaded instead of Form1

The So;X's So;X cracke 3

Download The_So;X_crackme3.zip, 159 kb (password: crackmes.de)
Browse contents of The_So;X_crackme3.zip

Try it and submit u r answer.
Patches are allowed.
NOP is also allowed

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 08. Apr, 2008
Downloads: 2000

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by apuromafo, published 11. apr, 2008; download (789 kb), password: crackmes.de or browse.

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Solution by costy, published 11. apr, 2008; download (244 kb), password: crackmes.de or browse.

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Solution by DrPepUr, published 11. apr, 2008; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

DoctorDeath 08. Apr 2008	Yea i´ve done it, and i am totaly beginner in this. Nice work !
r00ster 08. Apr 2008	Patching that program results in a 5 seconds Olly session. Thank you for your code!
apuromafo 08. Apr 2008	nice, but must perfectionate a little nice this: BackColor = &H80000009& Caption = "Tx to _raven , Black Eye and crackmes.de"
crack-break 09. Apr 2008	just watch your mail pal
jvwarrior 10. Apr 2008	What did you guy use to open this? I tryed using the reflector but it said a CLI heading is missing or something like that.
DigitalAcid 11. Apr 2008	@jvwarrior: reflector is only for applications programmed in .NET, this one is (Visual) Basic. Use Olly for exe/dll files ;).
apuromafo 11. Apr 2008	you see the nice pic? yea xD nice
BRK12345 13. Apr 2008	lol this is deadly easy!! solved in 10 secs!
Ganoes Paran 01. Jun 2009	umm just have to patch the conditional jump and thats it no? lol.

The So;X's So;X PAtch ME 4.0

Download sox_patchme_4.0.zip, 221 kb (password: crackmes.de)
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Try to patch this and not solve this
password is given as 123456,

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 13. May, 2009
Downloads: 768

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Solutions

Solution by wibf, published 03. sep, 2009; download (438 kb), password: crackmes.de or browse.

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Solution by DTShady, published 15. may, 2009; download (215 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

The So;X Author 14. May 2009	ok i'll make this more harder .. Try to solve it without using .net reflector Use only IDA.
MCxCodex 14. May 2009	IDA??!! Sigh! :) I used ILDasm + WinHex to solve it.
DTShady 15. May 2009	Mod said I should say what tools I used. So, I used IDA and Hex Workshop. I do have a basic understanding of assembly but this was my first time trying to solve something like this. .net confused my and I had to do some research on google :3 I'm a happy noob!
The So;X Author 16. May 2009	DTShady good job... see T.0.R.N.A.D.0. instead of arguing with the tools DTShady solve it and posts the solun...
cyclops Moderator 17. May 2009	Please don't start flame wars. Author has the full rights to restrict the solver. If anyone doesn't like the rules, he can just bail out. But don't start commenting on rules. As a matter of facts, I really don't like restricting the usage of tools. Restriction should be abstract: Don't patch/Brute Force/Keygen Only! Just my 2 cents.
The So;X Author 20. May 2009	Tx cyclops, such peoples don't understand that these crackmes for them to repolish their knowladge....
The So;X Author 20. May 2009	T.0.R.N.A.D.0. sorry dude if i hurt u by any means.. but u started first and i deserve same from u
T.0.R.N.A.D.0. 21. May 2009	It's all right, let's forget this thing :)
reichoman3 14. Sep 2009	ive found a very very very easy way to display the good boy message :D.its really simple o.0 my tut will come soon.
The So;X Author 15. Sep 2009	@ reichoman3 if u find easy way then please upload solun.... if link is closed then pls upload it somewhere else and paste link here

The So;X's The So;X 3 way crackme

Download The_Sox_3_Way_Crackme.zip, 83 kb (password: crackmes.de)
Browse contents of The_Sox_3_Way_Crackme.zip

Go solve this

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 13. May, 2009
Downloads: 466

Rating

Votes: 3
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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

T.0.R.N.A.D.0. 14. May 2009	I'm back after a long time :) Hey So;X I think I found a bug (or may be I'm missing something) : You accept names that are at-least 8 chars long. So, how do you expect to extract a sub string like this: Name.Substring(3,7) ?!? That would require names to be at-least 10 chars long !!
T.0.R.N.A.D.0. 14. May 2009	One more : You do not change Me.aaa, Me.bbb, Me.req1, Me.req2 to empty strings ("") in the Button1_Click sub, before checking for the conditions that set them to appropriate values.
The So;X Author 14. May 2009	oh sorry dude i miss understood substring function ,... please those who are downloaded this crack me put 10 char long string in to it.... sorry for my ignorance. Tx T.0.R.N.A.D.0
obnoxious 14. May 2009	am i missing some thing Convert.ToBoolean("τ123") how can that be done???
The So;X Author 19. Jul 2009	come on ... No solutions.... :(
MrGneissGuy 02. Aug 2009	The S0;X The reason there's no solution for you crackme is that it's impossible to solve. in your keyckeck, there 4 conversions to boolean that are impossible. The ONLY strings that can be converted to boolean are "true" and "false". The code can't be executed, so it falls back on the catch which tells us it's the wrong key. You can fix it if you like, but I don't know what you had intended.
The So;X Author 06. Aug 2009	This is what u see in reflector If (((((Me.TextBox3.Text = (sol1 & Me.aaa)) = Conversions.ToBoolean(("chk" & Me.bbb))) = Conversions.ToBoolean(("chk" & Me.req1))) = Conversions.ToBoolean((ChrW(964) & Me.req2))) = Conversions.ToBoolean(ChrW(964) & "123")) Then Interaction.MsgBox("Your copy is registered" & ChrW(13) & ChrW(10) & "Way to go my freiend.......", MsgBoxStyle.OkOnly, Nothing) This is what i actually written If TextBox3.Text = sol1 & aaa = "chk" & bbb = "chk" & req1 = "τ" & req2 = "τ123" Then MsgBox("Your copy is registered" & vbNewLine & "Way to go my freiend.......")
obnoxious 07. Aug 2009	yes but you are still missing on the parenthesis!!!!!!
The So;X Author 08. Aug 2009	ya i know.... may be i am missing or may be not....:)
The So;X Author 08. Aug 2009	as u all can see this is kind of misunderstanding reflector creates...It does not show what actually written...
Mayhem 06. Dec 2010	Due to having copied most of the code from Reflector and making a keygen/reg value creator and the crackme still not accepting the serial it produces I have to conclude that it does indeed fall back on the catch. This was further confirmed when I edited the code with Reflexil to see exactly what as going on. If anyone can prove this wrong I will be very happy as it annoyed me somewhat when I realized what was happening.
bLaZeD 26. Feb 2011	done: http://i.min.us/ijCsUC.png
Mayhem 26. Feb 2011	@bLaZeD: Not quite, see readme... Rules : * No Patching (as always) * you'll need to make key gen
bLaZeD 09. Apr 2011	I don't get rules, crackmes are to test security. If someone can patch your program, and get past it; It's cracked.

The So;X's The So;x crackme#4

Download The_So;x_crackme_#4.zip, 9 kb (password: crackmes.de)
Browse contents of The_So;x_crackme_#4.zip

Nice one .. Try it

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 27. Apr, 2008
Downloads: 430

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Solutions

Solution by obnoxious, published 03. jun, 2008; download (152 kb), password: crackmes.de or browse.

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Discussion and comments

eviljun-hacker 04. Jun 2008	hey tell me how to know crack it? give some a clue?
obnoxious 04. Jun 2008	i have posted a tutorial check it! in the solutions section
MulleDK13 04. Jun 2008	lol.. easy.. found all keys XD
Nicohogtag 24. Apr 2011	Key1 : Anything you want Key 2 : Anything you want Master Key : *364+so;X§☻☻ Getting 9373284547

The So;X's The So;X CrackMe no1

Download CARCKME1.zip, 10 kb (password: crackmes.de)
Browse contents of CARCKME1.zip

Not so easy but try it

Difficulty: 2 - Needs a little brain (or luck)
Platform: DOS
Language: C/C++

Published: 12. Mar, 2008
Downloads: 459

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Solutions

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Discussion and comments

The So;X Author 22. Apr 2008	C-on I am wating for your answer.... Hint : no loop is present for calculation of code
DigitalAcid 27. Apr 2008	Well, DOS crackmes are for oldskool crackers =). I don't know many programs to crack dos programs. IDA does work, but i can't even work with a 32 bit program in IDA.
Mathias 04. Jun 2009	Nice one! Thanks MD5: 26C8106F0F28BD50208678B59C7F722D

The So;X's This Crackme Killing ME

Download This_Crackme_Killing_ME.zip, 10 kb (password: crackmes.de)
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Something funny but difficult to solve

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 10. May, 2008
Downloads: 518

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by papanyquiL, published 27. may, 2009; download (5 kb), password: crackmes.de or browse.

papanyquiL has rated this crackme as boring crap.

Solution by Haykuro, published 14. may, 2008; download (67 kb), password: crackmes.de or browse.

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Solution by MACH4, published 15. may, 2008; download (668 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

MACH4 10. May 2008	there are a few basic mistakes which makes cracking it too easy! Do you want me to post them here or pm you! or put it in my solution! MACH4
KoЯn Rulz 10. May 2008	Good CrackMe, But Like MACH4 Says, You Have Some Bugs That Make It Easier. Good .NET Programing Though.
The So;X Author 12. May 2008	both of U thank U very much for suggesting me.Would pleas place my mistakes on this blog as wall as in crackme
MACH4 12. May 2008	I have already submitted the solution explaining the few problems so hope that might help some! MACH4
EvOlUtIoN 12. May 2008	I don't know what kind of mistakes you done... This is a difficult 2, and i think it is correct at now. It taken me about 10 minute so completely solve and also writing a simple keygen...it is easy. Maybe you mean that mistakes is that you can see positioning of checkbox, so you can know easily tha number associated...or what else? Anyway, tomorrow i'll write a simple solution on how i solved it.
Haykuro 13. May 2008	hmm, took me a good 2 minutes to find a solution (1 minute on the checkboxes, another minute writing the keygen :P) rather fun keygenme nontheless! good job!
The So;X Author 15. May 2008	hey...hey I am still newbie in this field so don't fire your gun on Me. MACH4 thanks budy. Ok i agree i make some mistakes but i'll try to minimze such kind of mistakes
obnoxious 17. May 2008	checkboxes : checking all of them together let me the pass1 the rest was easy

thigo's 3bis

Download kgme3b.zip, 22 kb (password: crackmes.de)
Browse contents of kgme3b.zip

analyze the encryption

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Mar, 2002
Downloads: 1549

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Solutions

Solution by dr.cipher, published 30. mar, 2002; download (4 kb), password: crackmes.de or browse.

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Solution by roy, published 30. mar, 2002; download (5 kb), password: crackmes.de or browse.

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Solution by j!m, published 30. mar, 2002; download (125 kb), password: crackmes.de or browse.

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Discussion and comments

thigo's keygenme2

Download thigo_kg2.zip, 61 kb (password: crackmes.de)
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name/serial. uses crypto

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. May, 2001
Downloads: 1933

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Solutions

Solution by roy, published 26. may, 2001; download (77 kb), password: crackmes.de or browse.

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thigo's keygenme4

Download thigo_kg4.zip, 29 kb (password: crackmes.de)
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name/serial

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Mar, 2002
Downloads: 1895

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Solutions

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to thomas.idpz.net »

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Discussion and comments

Thogamer Author 09. Jun 2013	Anyone still trying?
loizos 16. Jun 2013	I'll give it a shot
loizos 16. Jun 2013	I am a newbie i am at difficulty 2 atm.There is not MessageBoxA or GetItem.Any help?
Thogamer Author 20. Jun 2013	Loizos, this is probabbly a little to hard for you, train a little bit harder and try again then.

thomas.idpz.net's crackme#1 thomas.openmod.org

Download crackme1_thomas.zip, 4 kb (password: crackmes.de)
Browse contents of crackme1_thomas.zip

HI all,

simple crackme, good to begin.

Find the correct serial, make a keygen, and write a solution :-)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 24. Nov, 2007
Downloads: 787

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by kbpower, published 30. sep, 2008; download (3 kb), password: crackmes.de or browse.

kbpower has rated this crackme as quite nice.

Solution by ascii, published 06. dec, 2007; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

noukeys 26. Nov 2007	Needs the library VB6FR.DLL ¿It´s a BUG?
TiGa 26. Nov 2007	No problems here with a standard VB install. I don't think FR stands for French.
pr2007 27. Nov 2007	Even when VB6 is installed, it doesn't run. I downloaded VB6FR.dll and placed it in the same directory as the executable. But still I get the same error message: the language dll VB6FR.dll could not be found.
halsten 28. Nov 2007	Runs well in here.
noukeys 04. Dec 2007	You need to place the VB6FR.dll library in the folder /windows/system32/ and the tool run fine. Nice crackME :P
thomas.idpz.net Author 06. Dec 2007	anybody want's to write a solution ? :)
dom1n00 14. Mar 2008	yepp, so easy to a valid serial
xylitol 15. Mar 2008	Your solution to this crackme was rejected. damn i have not maked keygen
Sinok 16. Mar 2008	Nice, tho first crackme I've seen this VB6FR o.o Name1:6957891472 gg ;D

Thorwak's Thorwak Crackme01 (selfkeygenme) (Win32)

Download thorwakcm01.zip, 23 kb (password: crackmes.de)
Browse contents of thorwakcm01.zip

2008-06-03

Thorwak Crackme 01

This is my first crackme. In fact, it's my first Windows program.
Ever. I started learning yesterday so please don't expect too
much =)

I want a keygen for this crackme. Since it's my first one,
self-keygen is enough. Also, this is to enable more ppl to post
a solution.

Obviously, complete reversal and writing a standalone keygen
gives extra creds though! :)

Please do comment, good or bad!

Written in native Win32 using VC++ Express.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: C/C++

Published: 03. Jun, 2008
Downloads: 505

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by obnoxious, published 09. jun, 2008; download (32 kb), password: crackmes.de or browse.

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Discussion and comments

obnoxious 04. Jun 2008	selfkeygen ready. working on real keygen............ will post a tut as soon as real keygen is done
Thorwak Author 09. Jun 2008	(There was another comment here, but it got removed (did I do it by mistake? weird..) so I removed my answer too. Ask again if you want to...)
TiGa 09. Jun 2008	The comment was removed because posting a serial is not allowed.
Thorwak Author 10. Jun 2008	TiGa: Ok, thanks for the explanation. I thought it was OK since it was only a serial for that particular username. I guess I'll go read up on the rules better now :)

Thorwak's Thorwak Crackme02 (Win32)

Download thorwakcm02.zip, 22 kb (password: crackmes.de)
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June 11 2008

Thorwak CrackMe #02

My second crackme. It should be at least a little bit harder than my last one, I hope :)

No rules, do anything you want. Just find out the password that will let you see the GoodBoy message.

You may find bruteforcing is the way to go, and I have made sure it is possible in a reasonable amount of time if making a couple of not too far fetched assumptions. It's probably possible to solve this one with fairly basic cryptoanalysis as well
though. OK, enough with the hinting, get cracking :)

Written in C++, WIN32. Tested on a couple of different Windows XP machines.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 11. Jun, 2008
Downloads: 461

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Solutions

Solution by PeterPunk, published 27. jun, 2008; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

Thorwak Author 25. Jun 2008	Noone working on this one? Is it too difficult for a lvl 3 or just boring? :P
DigitalAcid 25. Jun 2008	Looks like another bruteforceme :/. Because you ask so nice, i'll try to solve it.
lilxam 25. Jun 2008	I'm trying to solve it too, but i don't think a direct bruteforce is possible because of the too many possibilities. So i've begin to analyse the algo and i think i'm not far to arrive to reverse it.
DigitalAcid 25. Jun 2008	Yeah, if you try all possible combinations it will take about 48939 days or 134 years, if my calculations are correct =). I could be alot shorter if we only try lower and/or uppercase or so. I looked at the algo, but don't know if it is reversable. Maybe we can find the first couple of bytes by guessing what they should be and therefor find the first letters of the password =).
Thorwak Author 25. Jun 2008	lilxam: Will be interesting to hear what you find! DigitalAcid: I think you might be on to something :P
lilxam 25. Jun 2008	erf one of my tehories was wrong :/ So it makes me thinking that the algo isn't reversible. And for the first bytes, i don't see how you want to guess it. I hope someone will make a solution (DigitalAcid ?) cause i'm very curious to see it.
PeterPunk 25. Jun 2008	Oh Yeah. Catched!!!
DigitalAcid 27. Jun 2008	Nice solution. I'm glad now I don't have to try to solve it anymore :). I tried an inline bruteforcer, but it's not doing things right.
Thorwak Author 27. Jun 2008	PeterPunk: Well done, and nice tutor!

Download crackme.zip, 298 b (password: crackmes.de)
Browse contents of crackme.zip

This is my first crackme(serialme). There are no anti-debug tricks, but the file is encrypted and decodes itself at startup.

Rules:
- no patching
- find the only valid key

I hope you'll like it!
Thunder

(i know my English is bad - I am from Austria)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 07. Jun, 2010
Downloads: 1276

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by quangredlight, published 09. jun, 2010; download (12 kb), password: crackmes.de or browse.

quangredlight has rated this crackme as nothing special.

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Discussion and comments

Intline9 09. Jun 2010	not working on win7 x64 (obviously) its working on xp x86
ChupaChu 09. Jun 2010	just dump: -d 0b87:0186 190 and you get your password right a way: jkl7FJDu47! long time i have seen this dos caesar crypto :) brings up memories :)
Thunder Author 09. Jun 2010	Oh, i forgot to translate it. "Stimmt nicht" means wrong password and "Stimmt" means right one. thanks for commenting.
Chazza93 09. Jun 2010	Im still yet to crack this, but I'm working on it :)
madmaurice 14. Jul 2010	crashes on run got winxp 32bit O.o
Flow-Chi 11. Aug 2010	of course it doesn't work on vista x86 either :( but nice to see someone of my country here :D
NeonByte 12. Aug 2010	lol Austria, welches Bundesland?
Thunder Author 20. Aug 2010	Wien @madmaurice: crazy behaviour. I've got the same OS.

Thunder_cls's NCrackme v0.1

Download NCrackme.v0.1.ByThunderCls.zip, 47 kb (password: crackmes.de)
Browse contents of NCrackme.v0.1.ByThunderCls.zip

This is a very easy crackme I made for REtosCLS initiative, it is coded in C#, all you gotta do is to find a valid registration code, no patching as a valid solution (it wouldn't be funny at all), feel free to use the tools you like.
"...you are gonna have a quick review on your algebra skills for the final test ;)"

You are gonna need .Net Framework v3.5 installed to run this
Good luck! and Happy Cracking to All!!
ThunderCls

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 10. Dec, 2015
Downloads: 554

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Solutions

Solution by apuromafo, published 09. feb, 2016; download (321 kb), password: crackmes.de or browse.

apuromafo has rated this crackme as quite nice.

Solution by klefz, published 09. feb, 2016; download (2 kb), password: crackmes.de or browse.

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Solution by acruel, published 09. feb, 2016; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

acruel 12. Dec 2015	i love maths :)
givses 14. Dec 2015	Like: TC2N-15BB-14CC-RTCR Then the BB and CC must be solved....
givses 15. Dec 2015	OK. Correct serial for this day: TC2N-1508-1505-RTCR
Thunder_cls Author 15. Dec 2015	Nice well done, the bruteforce takes all the fun out of the challenge, though
givses 16. Dec 2015	I hate maths so the brute is the clever way for me. :)
defensis 29. Dec 2015	I can't debug this with ollydbg, why?
apuromafo 08. Jan, 03:29	nice @givses, Acruel, im was solved using math, and posterior used the web http://www.tiger-algebra.com/drill/54$(x~2-13x_40)=0/ now was writed a little solution for my friend. by other side i was coded a keygen only to show there is posible to solve i was writed in delphi 7 se, a maybe have many spelling error (autor->author, some ecuation maybe was little error 14->13 ), but in fact the learning process was great Best Regards Apuromafo Pd:my native write is in spanish, im bad english writer, but not wana lost this little Crackme with nice Gui :)
Thunder_cls Author 09. Jan, 03:08	@defensis You can't use ollydbg with this one due this is .NET binary, you should use Reflector/dnSpy/etc instead.
tygrvrli 26. Mar, 12:41	TC2N - 1605 - 2608 - RTCR serial for this day. thanks for crackME.
Danbanan 08. May, 13:23	TC2N-1608-0805-RTCR Was fun doing some maths! :-)
Khalee 30. Aug, 17:18	string regKey = string.Format("TC2N-{0}05-{1}08-RTCR", DateTime.Now.Year.ToString().Substring(2, 2), (DateTime.Now.Day.ToString("00"))); My first crackme :D

Thunder_cls's Sticky Crackme

Download sticky_crackme.zip, 82 kb (password: crackmes.de)
Browse contents of sticky_crackme.zip

This is just a crackme I made a couple years before, it's called "Sticky Crackme", and though it has some time now, it's still a funny challenge. The idea behind ??this crackme is to have a fun time and to also check on an unconventional method of "registering" an app, sort of speak, you'll see what I mean. I think it can be interesting to deal around with this application and decipher its functioning. This crackme is not designed for noobs, it's intended for advanced newbies at least, if you have some average knowledge you shouldn't have any issue, it's a relative easy challenge though.
"...watch the code very close and you'll see some growing light..."

Rules:
1- Not worth patching the executable as a final solution.
2- Make a "keygen" in the language you want. The keygen should be considered as a GOLD solution if the same methods used by the crackme are used when registering it. That is, the keygen must register the application without the user having to do anything but to press a simple button ;)
3- Make a tutorial on how you have overcome the crackme and the construction of the keygen.

That's pretty much it, hope you like it...
happy cracking to all!!
ThunderCls

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 25. Jan, 2016
Downloads: 584

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Solutions

Solution by aldeid, published 09. feb, 2016; download (291 kb), password: crackmes.de or browse.

aldeid has rated this crackme as quite nice.

Discussion and comments

acruel 01. Feb, 23:00	Funny. Will submit a solution later.
r0bert 06. Feb, 08:40	this crackme uses the windowsXP offset (relative to ProcessHeap) for ForceFlags, 0x10: MOV EAX,DWORD PTR FS:[30] MOV EAX,DWORD PTR DS:[EAX+18] MOV EAX,DWORD PTR DS:[EAX+10] From windows 7 it changed to 0x44: MOV EAX,DWORD PTR FS:[30] MOV EAX,DWORD PTR DS:[EAX+18] MOV EAX,DWORD PTR DS:[EAX+44] this crackme only works reliably on XP
Thunder_cls Author 07. Feb, 05:27	@r0bert Indeed, you are right on what you are saying, though It has nothing to do with the correct functioning of the crackme, despite this it is still fully functional and solvable ;)
Thunder_cls Author 07. Feb, 05:30	c'mon guys its not that hard xp
acruel 08. Feb, 09:01	solution i posted seems not to satisfy the rule #2.
aldeid 08. Feb, 13:45	Solution posted! Very nice crackme.
Thunder_cls Author 08. Feb, 21:28	@acruel I didn't receive any solution, or at least I haven't been notified about it.
Thunder_cls Author 08. Feb, 21:29	@aldeid thanks, glad you like it ;)
acruel 09. Feb, 12:03	@Thunder_cls Thanks. I guess the solution is under review by mods.
Thunder_cls Author 10. Feb, 23:42	@aldeid Great tut man!, I liked it, congratz and thanks for taking time xD
Banthar 17. May, 13:43	Very nice crackme. Quite funny to overcome those Protections! 9/10
IWannaBeTheBest 30. Aug, 23:16	I haven't finished yet but I like it alot. Thanks for sharing :)

TiGa's CryptoKeygenMe #1

Download CryptoKeygenMe#1.by.TiGa.zip, 24 kb (password: crackmes.de)
Browse contents of CryptoKeygenMe#1.by.TiGa.zip

KeygenMe with some cryptography

Make a keygen that works all the time

Write a solution explaining how you solved it

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 26. Jul, 2007
Downloads: 725

Rating

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Solutions

Solution by MR.HAANDI, published 05. aug, 2007; download (571 kb), password: crackmes.de or browse.

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Solution by boonz, published 03. aug, 2007; download (72 kb), password: crackmes.de or browse.

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Solution by Crosys, published 03. aug, 2007; download (154 kb), password: crackmes.de or browse.

Crosys has not rated this crackme yet.

Discussion and comments

TiGa Author 02. Aug 2007	Unfortunately, I had to remove MR.HAANDII's keygen due to a FAQ violation (posting a link to a solution in the comments area). If I didn't, a moderator would have done the same anyway. It will make its way back after it has been approved through the proper channels. There is still time to submit other solutions!!!
TiGa Author 02. Aug 2007	BTW Congratulations MR.HAANDI!!!
MR.HAANDI 03. Aug 2007	Nice solution boonz! I think I just should've written a few lines into a text file
TiGa Author 05. Aug 2007	Big thanks to everybody who solved it and those who tried.

TiGa's KeygenMe #1

Download KeygenMe#1.by.TiGa.zip, 6 kb (password: crackmes.de)
Browse contents of KeygenMe#1.by.TiGa.zip

PatchMe/KeygenMe

Patch one byte to bypass Time Trial

Make a keygen

Write a solution

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 22. Jun, 2007
Downloads: 703

Rating

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Solutions

Solution by hound, published 26. jun, 2007; download (15 kb), password: crackmes.de or browse.

hound has rated this crackme as quite nice.

Discussion and comments

TiGa's KeygenMe #2

Download KeygenMe#2.by.TiGa.zip, 7 kb (password: crackmes.de)
Browse contents of KeygenMe#2.by.TiGa.zip

KeygenMe

Make a keygen

Write a solution

Don't worry, it works. I made a Keygen for it myself.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 01. Jul, 2007
Downloads: 856

Rating

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Solutions

Solution by XzzX, published 19. jul, 2007; download (303 kb), password: crackmes.de or browse.

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Solution by Crosys, published 19. jul, 2007; download (111 kb), password: crackmes.de or browse.

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Discussion and comments

Zaphod 07. Jul 2007	Tiga, is there an Olly-check in this crackme? I can't find any, but it doesn't seem possible to find a serial for my name. An Olly-check sending us off on a wild goose chase could explain that.
XzzX 07. Jul 2007	No there aren't any anti-dbg checks. At least I didn't find one and I've solved it.
Zaphod 07. Jul 2007	Hmmm. I don't know what I'm doing wrong - it looks simple enough, but those bytes that should be equal...I just can't make them the same value :( Perhaps you are writing a tutorial, XzzX ?
TiGa Author 07. Jul 2007	If I didn't write this KeygenMe, I would be the first to say: All 4 calculated dwords have to be the same and equal to to the random code every time? That sounds like really bad programming from the author! Either there is a trick or it is impossible. Or maybe both?
XzzX 09. Jul 2007	@Zaphod: Yes i uploaded a tutorial. I don't know when it will be approved.
Zaphod 09. Jul 2007	Great, XzzX! Hope it's approved soon...

TiGa's Vista Sidebar Gadget Crackme

Download VistaSidebarGadgetCrackme.by.TiGa.zip, 15 kb (password: crackmes.de)
Browse contents of VistaSidebarGadgetCrackme.by.TiGa.zip

Format: Windows Vista Sidebar Gadget (.gadget)

Work to do: Find out what is a .gadget
Remove the nags
Activate the backdoor
Turn the crackme into a keygen in .gadget format
Write a solution

Optional: Write a keygen in a "traditional" programming language (.exe)

It's not numbered because I don't plan on making another one!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows Vista Only
Language: Unspecified/other

Published: 21. Aug, 2007
Downloads: 590

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Solutions

Solution by Sunshine, published 17. may, 2008; download (22 kb), password: crackmes.de or browse.

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Discussion and comments

br0ken 10. Oct 2007	For those of you with Win XP, you might want to take a look at this, http://www.wincert.net/forum/index.php?showtopic=1442
hardik_satasiya 07. Feb 2009	TiGa U r my favorite reverse enginer. I have one question? which screen recorder u r using? and how u put your comments on it? plz replay me...
hardik_satasiya 07. Feb 2009	or email me on hardik_satasiya@yahoo.com

timeleg's CrackMe1

Download crackme1.zip, 5 kb (password: crackmes.de)
Browse contents of crackme1.zip

=======================
- CrackMe1 by timeleg -
=======================
Hi crackmes.de community,
This is a little and very simple crackme

Difficulty: 1 - Very easy, for newbies
Goal: 1. Understand how program and verification algorithm works.
Don't patch verification algorithm.
2. Find a valid password.
3. Write a tutorial.

have fun and enjoy !
timeleg86@gmail.com

{Slovak}
Zdravim Vas, crackme1 je vskutku jednoduche, na zahriatie. Patri do celku mojej diplomovej prace, tak Vas prosim pozrite a okometujte. Dakujem.
timeleg

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 16. Mar, 2015
Downloads: 1095

Rating

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Solutions

Solution by danerd, published 21. apr, 2015; download (6 kb), password: crackmes.de or browse.

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Solution by SoggyDonuts, published 21. apr, 2015; download (1 kb), password: crackmes.de or browse.

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Solution by vigilanz, published 21. apr, 2015; download (1 kb), password: crackmes.de or browse.

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Solution by dragonfly_2, published 21. apr, 2015; download (101 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Phoenix Axe 26. Mar 2015	Stupid!!!First make the file executable then I will try to find its solution....
pmichaud 05. Apr 2015	I'm running WinXP and it will not run
timeleg Author 05. Apr 2015	.Net Framework 4.5.51641
givses 07. Jul 2015	Just compile into Framework 4. We cannot run the file... (XP)
fsmd 13. Aug 2015	1111 this is the serial aa+a0xffb=0x1589c0 ->a=0x140 (1) (0x140^0x145+0xf4b)/80=49(0x31->'1') the len0 must be four,then 1111 is the right serial!

timeleg's CrackMe2

Download timeleg_s_crackMe2.zip, 5 kb (password: crackmes.de)
Browse contents of timeleg_s_crackMe2.zip

=======================
- CrackMe2 by timeleg -
=======================
Hi crackmes.de community,
This is my second crackme. It's easy.

Difficulty: 1 - Very easy, for newbies
Goal: 1. Understand how program and verification algorithm works.
Don't patch verification algorithm.
2. Find a valid password.
3. Write a tutorial and keygen.

have fun and enjoy !
timeleg86@gmail.com

{Slovak}
Zdravim Vas, crackme2 je jednoduche. Patri do celku mojej diplomovej prace, tak Vas prosim pozrite a okometujte. Dakujem.
timeleg

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 19. Feb, 2015
Downloads: 802

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Brentbmwh, published 16. mar, 2015; download (3 kb), password: crackmes.de or browse.

Brentbmwh has rated this crackme as boring crap.

Solution by Porr3, published 16. mar, 2015; download (126 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Tessier-Ashpool RE Dept 27. Feb 2015	Thank you for making this! I'm brand new to this type of work and I really appreciate it. Thanks again.
elmasmalo1 27. Feb 2015	Thanks Timeleg! really nice CrackMe2, I submitted my approach to the solution and it's currently under moderator's review. This had me struggling for a while as I said in the video later on. Regards, elmasmalo1 AKA ULI-R0
al3xs7x 15. Mar 2015	Hello. I have just uploaded a quick solution for this CrackMe. If anyone is interested in technical details, contact me.
o0xmuhe 06. Apr 2015	Thanks Timeleg!
KaktusManCz 08. Apr 2015	Thank you very much ! This is my first cracked program. Thank again. Sorry for bad english. {Czech} Diky za program, byl to muj ulpne prvni cracknuty program ;) Jeste jednou diky.
Asmodeous 09. Apr 2015	I tried reversing with OllyDbg, bloody difficult. I could find static strings like the error message, but can't make heads or tails of the calls to create the password. Obviously in NET reflector it's ez, might give it a go again sometime in Olly.
givses 07. Jul 2015	Visual Basic .NET Dim strB As String = (((Environment.MachineName & "-") & DateTime.Now.Year.ToString & DateTime.Now.Hour.ToString) & "-" & Environment.UserName.ToUpper) MessageBox.Show(strB)
dkzeb 02. Sep 2015	Probably pretty fun for noobs! This was my first CrackMe on this site - but it was pretty simple. Using ILSpy one could very easily find the method used to compare the password and the solution was then VERY apparent. Still pretty fun i guess - if you are just getting started! :)

timeleg's CrackMe3

Download timeleg_s_crackMe3.zip, 6 kb (password: crackmes.de)
Browse contents of timeleg_s_crackMe3.zip

=======================
- CrackMe3 by timeleg -
=======================
Hi crackmes.de community,
This is my third crackme. It's moderately difficult.

Difficulty: 2 -Needs a little brain (or luck)
Goal: 1. Understand how program and verification algorithm works.
Don't patch verification algorithm.
2. Find a valid password.
3. Write tutorial and keygen.

have fun and enjoy !
timeleg86@gmail.com

{Slovak}
Zdravim Vas, crackme3 je mierne zlozitejsie. Patri do celku mojej diplomovej prace, tak Vas prosim pozrite a okometujte. Dakujem.
timeleg

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 19. Feb, 2015
Downloads: 226

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Solutions

Solution by boonz, published 22. apr, 2015; download (54 kb), password: crackmes.de or browse.

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Discussion and comments

timeleg's CrackMe4

Download timeleg_s_crackMe4.zip, 6 kb (password: crackmes.de)
Browse contents of timeleg_s_crackMe4.zip

=======================
- CrackMe4 by timeleg -
=======================
Hi crackmes.de community,
This is my fourth crackme. It's moderately difficult.

Difficulty: 2 -Needs a little brain (or luck)
Goal: 1. Understand how program and verification algorithm works.
Don't patch verification algorithm.
2. Find a valid registration file.
3. Write tutorial and keygen.

have fun and enjoy !
timeleg86@gmail.com

{Slovak}
Zdravim Vas, crackme4 je mierne zlozitejsie. Kontroluje registracny subor. Patri do celku mojej diplomovej prace, tak Vas prosim pozrite a okometujte. Dakujem.
timeleg

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 19. Feb, 2015
Downloads: 269

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by vigilanz, published 21. apr, 2015; download (3 kb), password: crackmes.de or browse.

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Solution by Matteo, published 31. mar, 2015; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

Matteo 13. Mar 2015	i have solved it :) valid KeyFile: --- * Licencny subor * * Diplomka 2015 * aaaaaaaaaaaaaa Matteo --- (paste the part between "---", no "---" in notepad) save the file with name "Licencny_subor" i have a question: is in general a good thing to post a working serial? pro: it can help other people to solve it con: removes all the fun please let me know!!
halsten 07. Apr 2015	I don't think it's highly encouraged, though a tutorial or a PM would be sufficient. That's my opinion though. :)
Matteo 07. Apr 2015	yes, also zairon told me that is better to not give working serials in comments. sorry timeleg :)
timeleg Author 07. Apr 2015	to me it does not matter, this is for you

timeleg's CrackMe6

Download timeleg_s_crackMe5.zip, 6 kb (password: crackmes.de)
Browse contents of timeleg_s_crackMe5.zip

=======================
- CrackMe5 by timeleg -
=======================
Hi crackmes.de community,
This is my fifth crackme. It's moderately difficult.

Difficulty: 2 -Needs a little brain (or luck)
Goal: 1. Understand how program and verification algorithm works.
Don't patch verification algorithm.
2. Find a valid password.
3. Write tutorial and keygen.

have fun and enjoy !
timeleg86@gmail.com

{Slovak}
Zdravim Vas, crackme5 je mierne zlozitejsie. Patri do celku mojej diplomovej prace, tak Vas prosim pozrite a okometujte. Dakujem.
timeleg

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 19. Feb, 2015
Downloads: 200

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Solutions

Solution by Narwhal, published 12. may, 2015; download (89 kb), password: crackmes.de or browse.

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Discussion and comments

tipiax's hccc keygenme

Download tipiax_hccc5keygenme.zip, 16 kb (password: crackmes.de)
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name/serial (tricks)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 24. Jun, 2001
Downloads: 1246

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Solutions

Send a message to tJw »

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

Send a message to toma6868 »

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Discussion and comments

mjesun 01. Nov 2008	How it is suposed that a Mrs should register her program? The condition Mid(Serial, 1, 2) = "734" is never true.

tJw's tjw crackme #1

Download crackme.zip, 13 kb (password: crackmes.de)
Browse contents of crackme.zip

Little crackme....not too hard...write a keygen

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jun, 2003
Downloads: 1330

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Solutions

Solution by xylitol, published 01. aug, 2008; download (101 kb), password: crackmes.de or browse.

xylitol has rated this crackme as quite nice.

Solution by br0ken, published 02. apr, 2008; download (59 kb), password: crackmes.de or browse.

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Solution by r00ster, published 03. apr, 2008; download (31 kb), password: crackmes.de or browse.

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Solution by obnoxious, published 02. apr, 2008; download (33 kb), password: crackmes.de or browse.

obnoxious has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

obnoxious 30. Mar 2008	it was easy thanks for the keygenme toma6868 will be posting a tut soon!!!!
toma6868 Author 30. Mar 2008	thx obnoxious ... i hope this keygenMe will delight some other newbies
Wasted_Bytes 30. Mar 2008	Solved..Easy one
r00ster 31. Mar 2008	Solved. I have also uploaded a little tut. Thank you toma6868 for your crackme! :-)
MACH4 02. Apr 2008	Hi toma6868, Now that your keygen is well and truly cracked, can you please give me some guidance, or PM me the source of your crackme! I found the algo's very easily, but when making a solution keygen in .NET I experienced runtime exceptions! Its just that I'm quite new to vb.net programming and would like to find out where I was going wrong! The exception was in the 7th line of ascEncode. Starts with: Left = Operators etc. The exception was "Argument Start must be greater than zero" I think it was referring to obj3 & obj8. being NULL or zero. Asm is easy compared to vb.net ha! Thanks, MACH4
toma6868 Author 02. Apr 2008	Hi MACH4 look at your PM ... I send you the main source of my crackme.... I hope it will help you :)
MACH4 02. Apr 2008	Hi toma6868, Thanks very much! I realise now where I was messing up! I had got confused with the meaning of Obect, as seen in reflector. obj3 & obj8 as Object. I realise now that its easy to get misled by it! Thanks again, MACH4

toma6868's KeyGenMe_3

Download KeyGenMe_3.zip, 94 kb (password: crackmes.de)
Browse contents of KeyGenMe_3.zip

Hi,

Rulez :
-> Fish a valid Name/Serail ;-)
-> Make a KeygeN
-> Write a tut'

Enjoy :D

Toma6868

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 20. Apr, 2008
Downloads: 402

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Solutions

Solution by DrPepUr, published 22. apr, 2008; download (316 kb), password: crackmes.de or browse.

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toshimi's serialme

Download serialme-byToShimi.zip, 15 kb (password: crackmes.de)
Browse contents of serialme-byToShimi.zip

Found the secret code.
No Patching
Only Newbies, please.
Level 1/10
Send your solution to..:: www.crackmes.de
or. :) quebbek@hotmail.com

....toshimi (2006).

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 22. Feb, 2006
Downloads: 1392

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Solutions

Solution by SkeYT, published 26. feb, 2006; download (16 kb), password: crackmes.de or browse.

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Send a message to !ToSsIc_ShAmRoCk¡ »

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Discussion and comments

lord__virus 02. Mar 2006	not necesary (fix)...:p
toshimi Author 06. Mar 2006	(not patching)!!!
xp45g 25. May 2012	This crackme actually seems impossible to solve without patching it like SkeYT did. That register can not possibly hold the correct value, no matter what serial you put in. Right?

!ToSsIc_ShAmRoCk¡'s Crackme#1

Download tossics_crackme1.zip, 224 kb (password: crackmes.de)
Browse contents of tossics_crackme1.zip

NameSerial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 05. Oct, 2002
Downloads: 2867

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Solutions

Solution by luucorp, published 31. dec, 2002; download (5 kb), password: crackmes.de or browse.

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Solution by Scooby D0o, published 07. oct, 2002; download (5 kb), password: crackmes.de or browse.

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Solution by _pusher_, published 07. oct, 2002; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

Tr3x_dj's UnlockME

Download UnlockME.zip, 13 kb (password: crackmes.de)
Browse contents of UnlockME.zip

You need to find the correct USERNAME and PASSWORD to login

! pay attention to the title "ID : number" (and it's input/output) and attributes ;) <-- little help

Q / A

- Patching?

* You may patch this app but the goal is to get the correct usernam and pass

- Ollydbg and smartcheck friendly checkox?

* Some little help to shut down the olly and smartcheck killer

- p-code ?

* no it's native code ;)

(this is from the readme)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 26. Apr, 2007
Downloads: 425

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

sd333221 30. Apr 2007	Patch: 00404AFA 0F 84 AC 06 00 00 To 00404AFA 90 90 90 90 90 90 Level 0.1/10 for patch
Tr3x_dj Author 30. Apr 2007	hehe :p - Patching? * You may patch this app but the goal is to get the correct usernam and pass patch only to get username :p isn't a prob to patch but n1

tr4ceflow's tr4ceflow Keygenme #1

Download tr4ceflowCrackme001.zip, 24 kb (password: crackmes.de)
Browse contents of tr4ceflowCrackme001.zip

No Cryptos, no Packers, just a serial verification and plain win32api. Good luck!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 28. Apr, 2014
Downloads: 280

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Solutions

Solution by Floyd_Warshall, published 17. may, 2014; download (37 kb), password: crackmes.de or browse.

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tragen's crackme #3

Download t_crackme3.zip, 7 kb (password: crackmes.de)
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key, key, multi-part serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 15. May, 2000
Downloads: 1460

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Solutions

Solution by CoilBuilt, published 29. nov, 2009; download (340 kb), password: crackmes.de or browse.

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Discussion and comments

TaGaDaPaF! 01. May 2005	Won't run on my win2k3.
p1nasIAT 20. Oct 2008	Doesn't run on WinXP(x32) either.
CoilBuilt 29. Nov 2009	Check solution to see how to make it run - simple fix.

Trevil Author 21. Feb 2009	Just noticed the typo, hehe, that's NOT part of the test...
D!PSW!TCH 12. Apr 2009	I got a serial, but in lack of knowledge of smartcheck i don't see through the algo all the way
Trevil Author 17. Mar 2010	A serial is not bad, I got one solution for keygen but he didnt wanna post it here so fast after I posted it, but now it has been awhile..
synak 23. Mar 2010	Asgeir Bjarni Ingvarsson (RSAv1.bas) :)
Trevil Author 08. Apr 2010	Finally a solution :) Now I can submit another kgme, :p

Trevil's Trevil's Keyegnme #2

Download keygenme2.zip, 3 kb (password: crackmes.de)
Browse contents of keygenme2.zip

Hey, good luck with this.. please send a pm if anything!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 08. Apr, 2010
Downloads: 441

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by _ghandi_, published 20. apr, 2010; download (15 kb), password: crackmes.de or browse.

_ghandi_ has rated this crackme as quite nice.

Solution by The-God-of-all, published 20. apr, 2010; download (14 kb), password: crackmes.de or browse.

The-God-of-all has rated this crackme as quite nice.

Send a message to Trias »

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Discussion and comments

gavin_soung 10. Apr 2010	name:Z A:0000000000 B:0000000000 serial:0000000000010392012345678912345601234567891234560123456789123456
The-God-of-all 10. Apr 2010	Well my Keygen is ready but I can't make a Tutorial. If anyone like he can ask me for the source Code (written in C). http://thegodofall.th.funpic.de/KeygenKeygenMe.exe But why is the serial 64 Characters long and the name can have only 24 Characters? This means that the last 16 Characters of the serial are ignored. If the name has less then 8 Characters only the first 16 Characters of the Key are relevant.
gavin_soung 10. Apr 2010	You mean that you can send KengenKeygenMe source Code to me? I want to know more about you keygen. I only know you use the Tiny Encryption Algorithm. And I got the key by Infinite try.(Forgive my poor English...)
gavin_soung 10. Apr 2010	My Email: gavin_soung@yahoo.com
_ghandi_ 12. Apr 2010	Why do people have to discuss such things here where people are going to download the keygenme to try for themselves? Surely the forum is a better place to discuss such things instead of ruining it for other people? If gettting your name up there is important, write a tutorial and submit it.
gavin_soung 12. Apr 2010	I am sorry, thanks to remind
_ghandi_ 19. Apr 2010	I'd like to know how that works.... I submitted a solution and it was rejected because of an error in the keygen code, fair enough. Yet The-God-Of-All submits a solution which has an error in the keygen code and its accepted? Lets see, mine was rejected because it wouldnt work on strings longer than 8 chars (miscalculation on my behalf) but the solution which was accepted cannot generate a serial for a 24 char aphanumeric name? Its the last time i'll bother with a crackme from this site, thats for sure.
_ghandi_ 19. Apr 2010	I should clarify, its not the keygen which has an error, but a quirk of the keygenme which prevents certain strings from being entered as a name, which then makes the keys generated for such names invalid, which has the same end result: badboy nag
_pusher_ 20. Apr 2010	I did many name/serial checks with spaces and special characters.. yours didt work.. but GodOfAll keygen worked.. but apparently you found a name that doest give valid serials.. and thats why iam gonna reject his aswell.
_ghandi_ 20. Apr 2010	The keygenme does not allow 24 characters if the characters are too large to be contained in the edit control, as it does not have auto horizontal scrolling. So, using the string "DDDDDDDDDDDDDDDDDDDDDDDD", we can generate a serial with The-God-of-all's keygen and it will be a valid serial in the sense that it follows the algorithm, but the GUI of the crackme will only allow 22 'D' characters and as such, you cannot enter the name and serial to validate it, as it will be truncated at the 22 'D' mark. I would like to see what combinations you tried on my second revision though, because the algorithm takes an ascii string, performs its operation on it and then the keygenme performs the inverse operation to retrieve the result, so if the ascii is printable then it should be a valid key from the second one i sent you and i limited input to 22 chars so that there was no possiblity of generating invalid keys, but it still got rejected.
_ghandi_ 20. Apr 2010	I'll eat humble pie, just tested the keygenme and it actually only accepts 21 'D' chars so my keygen is still invalid because it accepts 22 chars. Don't i feel like a complete douchebag?
The-God-of-all 20. Apr 2010	I have uploaded a corrected Version of my Keygen... I hadn't recognised the problem with the GUI, I watched only the code and there are 24 Characters allowed.
Trevil Author 26. Apr 2010	Really glad you guys like the keygenme. It was supposed to be a trial keygeme for fhcf a few years ago, :)

Trias's Crackme #1 by Trias

Download Crackme_by_Trias.zip, 177 kb (password: crackmes.de)
Browse contents of Crackme_by_Trias.zip

A simple crackme written in Delphi.
No packers are used.
The crackme contains a very trivial piece of anti-debugging code,
but I think even newbies will handle it without any problems ;)))
Please write a keygen, no patches are accepted.

P.S. If you register the program successfully, a menu will be unlocked.
You'll be able to show\hide Start button out of there :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 22. May, 2006
Downloads: 735

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Solutions

Solution by Skid Vicious, published 25. jun, 2006; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

indomit 22. May 2006	Why difficulty is 2? I got own serial for 2 minutes, after finding the place where it checking
Ank83 22. May 2006	yeap. It's easy one. I think that the difficylty level is based on the anti-debug trick. Regards Ank83
indomit 22. May 2006	:D I missed that you use for description of editboxes russian words "Ð˜Ð¼Ñ" and "Ð¡ÐµÑ€Ð¸Ð¹Ð½Ñ‹Ð¹ Ð½Ð¾Ð¼ÐµÑ€" instead of "Name" and "Serial number" ;) 2Ank83: IsDebuggerPresent hard trick? ;) Look at my keygen %) http://rapidshare.de/files/21124622/KeyGen.exe.html
robotangel 25. May 2006	Could anyone post a tutorial? I don't know where its checking if it is the right serial otherwise it'd be easy I think... I use OllyDbg with HideDebugger Plugin so I don't have to care about IsDebuggerPresent, do I? thx from a n00b who solved at least the "1 very easy" Crackmes ;-)

TripleTordo's Black4

Download Black4.zip, 241 kb (password: crackmes.de)
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Black4 by TripleTordo
Release Date: 15th December 2010
Language: c++
Level: 2/10
--------------------------------

Hey! , this is my 4th crackme. I hope you enjoy it.

******************
Rulez :
- NO patching allowed
- NO code ripping allowed

Just: Find protection scheme , and Serial Genaretion Algorithm. Write a tuto and a working keygen.

ONLY KEYGENS ALLOWED.

******************
i Hope you enjoy it, and if you can't find a valid solution, i hope you will learn something.
Regards.

Thanx to: you, for try this.

Suggestions, donations, free sex to :

.: tripletordo@gmail.com :.

EOF

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 27. Dec, 2010
Downloads: 541

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Zephy, published 14. jan, 2011; download (73 kb), password: crackmes.de or browse.

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Solution by draww, published 15. jan, 2011; download (15 kb), password: crackmes.de or browse.

draww has rated this crackme as quite nice.

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Discussion and comments

draww 27. Dec 2010	keygen+tut sent.. nice cm, thanks bro!
TripleTordo Author 27. Dec 2010	wow draww, just approved my last 2 CM!! you are fast :) Merry Xmas
draww 27. Dec 2010	thanks.. happy new year all ;)
draww 27. Dec 2010	and let's see when my solutions will be approved :P
Zephy 08. Jan 2011	thanks, very nice :-) sol+keygen send.
TripleTordo Author 08. Jan 2011	thanks to you for try this :-)

TripleTordo's Crackme#2

Download crackme2.zip, 4 kb (password: crackmes.de)
Browse contents of crackme2.zip

Crackme2 by TripleTordo
Release Date: 8th July 2009
Language: vb6
Level: 1/10
--------------------------------

Hey! , this is my Second crackme. I hope you enjoy it.

******************
Rulez :
- NO patching allowed
- NO code ripping allowed
Just: Find protection scheme , explain it and make a tuto.

This Crackme generates a valid serial, but how?. Find the way to crackme says "REGISTERED"

******************
i Hope you enjoy it, and if you can't find a valid solution, i hope you will learn something.
Regards.

Thanx to: you, for try this.

Suggestions, donations, free sex to :

.: tripletordo@gmail.com :.

EOF

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 13. Dec, 2010
Downloads: 1157

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by draww, published 18. dec, 2010; download (17 kb), password: crackmes.de or browse.

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Discussion and comments

draww 14. Dec 2010	solved what's going on.. but now i need to find the correct combination :)
TripleTordo Author 14. Dec 2010	Nice job draww. Waiting tut. Regards.
draww 15. Dec 2010	uhm, okay ;) writing my tutto..
draww 16. Dec 2010	submitted my solution, it took a bit long to finish it, i was busy, sorry for the delay :)
needle 18. Dec 2010	aye this thing is written in VB, like hell to try and disassemble... perhaps i'll give my first shot w/ another.
TripleTordo Author 18. Dec 2010	Nice tuto draww. Good job. Regards.
draww 18. Dec 2010	thank you ;) it was funny :D

TripleTordo's Ice9

Download Ice9.zip, 10 kb (password: crackmes.de)
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Ice9 by TripleTordo
Release Date: 3th July 2009
Compiler: Masm
Language: Pure win32ASM
Level: 1/10
--------------------------------

Hey! , this is my first crackme ( KeygenMe ), its very easy, for Newbies. I hope you enjoy it.

******************
Rulez :
- NO patching allowed
- NO name/serial allowed
- NO self-keygening, code ripping allowed
Just: Find protection scheme ( serial creating algorithm ), explain it and make a tuto and your own keygen.

This is a KeygenMe. Only keygens are allowed. Its very easy, no protection/encription, only one little trick. Good Luck.

******************
i Hope you enjoy it, and if you can't find a valid solution, i hope you will learn something.
Regards.

Thanx to: flipflop, Defc0n1, and of course, to you, for try this.

Suggestions, donations, free sex to :

.: tripletordo@gmail.com :.

EOF

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 07. Jul, 2009
Downloads: 2086

Rating

Votes: 11
Crackme is nothing special.

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Solutions

Solution by CesNew, published 14. jul, 2009; download (14 kb), password: crackmes.de or browse.

CesNew has rated this crackme as nothing special.

Solution by deurus, published 13. jul, 2009; download (66 kb), password: crackmes.de or browse.

deurus has rated this crackme as nothing special.

Solution by stranac, published 12. jul, 2009; download (2 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

TripleTordo Author 07. Jul 2009	Ok, this is my first crackme. I know its easy, so i hope you'll learn something, or if you ar advanced skill, enjoy. Sorry if you think this is bad crackme. The next one will be ( i think ) difficulty 2. Regards.
Coderess 07. Jul 2009	I wrote keyge, may be a bit later, I will write solution
dr.dmoon 09. Jul 2009	keygenme is done, dont know inglish to write solution, but i will try :)
TripleTordo Author 09. Jul 2009	Please vote crackme. If you have done a keygen, try to make a tut in english. I'm Spanish, and i am writing in english too. And if you want, make a keygen and a solution later, in this way more crackers will try this :) Regards.
Balthasar_magus 10. Jul 2009	done! thanks for crackme!
TripleTordo Author 11. Jul 2009	Thanks to U for try this. I see boring crackme in votes :( I know that level 1 crackme is boring for some people, but for newbies is the way to enjoy and learn ( my philosophy, enjoy and learn ). The next one will be level 3, and the 3rd will be level 2. I am new in crackmes.de and i would like to put progressive crackmes. Regards.
CesNew 12. Jul 2009	Maybe you shoul skip the IsDebuugerPresent API for your next "For newbies CrackMe" so we can focus in the algorithm :D
TripleTordo Author 12. Jul 2009	Yes, but IsDebuggerPresent is a little little trick, perfect for newbies. I think its easy, but maybe you got reason. Now solution uploaded, so the newbies can learn. Regards.
CesNew 12. Jul 2009	I already submmit a solution but i can't see it yet =( is my first solution so i hope i did it right xD
CesNew 12. Jul 2009	it was rejected because i forgot the keygen! I have right here but it wont allow me upload again =(
TripleTordo Author 14. Jul 2009	Hey, finally your solution was uploaded :P, i hope you enjoy. Now i have no much time, so my next crackme will be created after1 or 2 weeks. Hey, finally you solved IsDebuggerPresent. Regards and i hope you enjoy.
intruder 23. Jul 2009	guess Im late again... at least i made a vc# keygen for it... darn it >.<
madmaurice 14. Jul 2010	im late. but its a nice keygenme the loop at 004011B7 was a little confusing. and it was even more confusing when i saw the string "function" at 004011D0. now i know what it does and i tell you all who try: its very easy xD
TripleTordo Author 16. Feb 2011	Really easy Gabriel? of course, solutions were in 2009. lol.

TripleTordo's KeygenMe3

Download KeygenMe#3.zip, 200 kb (password: crackmes.de)
Browse contents of KeygenMe#3.zip

KeygenMe#3 by TripleTordo
Release Date: 13th December 2010
Language: c++
Level: 1/10
--------------------------------

Hey! , this is my Third crackme. I hope you enjoy it.

******************
Rulez :
- NO patching allowed
- NO code ripping allowed
Just: Find protection scheme , and Serial Genaretion Algorithm. Write a tuto and a working keygen.

ONLY KEYGENS ALLOWED.

Example:

Name:Triple
Serial:1158492848793R

******************
i Hope you enjoy it, and if you can't find a valid solution, i hope you will learn something.
Regards.

Thanx to: you, for try this.

Suggestions, donations, free sex to :

.: tripletordo@gmail.com :.

EOF

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 27. Dec, 2010
Downloads: 1238

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by tinqnpro, published 16. dec, 2012; download (8 kb), password: crackmes.de or browse.

tinqnpro has not rated this crackme yet.

Solution by AlexAltea, published 03. jan, 2011; download (2 kb), password: crackmes.de or browse.

AlexAltea has rated this crackme as quite nice.

Solution by draww, published 03. jan, 2011; download (8 kb), password: crackmes.de or browse.

draww has rated this crackme as boring.

The submission of solutions is closed.

Discussion and comments

TripleTordo Author 27. Dec 2010	Lol. Thank you draww :D
draww 27. Dec 2010	it's my pleasure, thx for the crackmes..
TripleTordo Author 28. Dec 2010	Happy new year to all, and thx for flowers :P
pj98a 13. Mar 2012	Very nice for beginners :). Just solved this as my first crackme ever :D
warlockn 19. Dec 2012	was fun, solved in 1 days :-D
christopherallwin 28. Dec 2012	Hey! this is cool....

Trojaner's Patch/InjectMe

Download PatchMe.zip, 5 kb (password: crackmes.de)
Browse contents of PatchMe.zip

This is my first Patch/InjectMe.
Patch or Inject it with a DLL, so that it will show the goodboy message :)

Happy Hacking!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 20. Oct, 2013
Downloads: 490

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by lykaner, published 28. nov, 2013; download (7 kb), password: crackmes.de or browse.

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Solution by Miko, published 28. nov, 2013; download (29 kb), password: crackmes.de or browse.

Miko has rated this crackme as quite nice.

Solution by tetsuo, published 05. nov, 2013; download (6 kb), password: crackmes.de or browse.

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Solution by simasce, published 05. nov, 2013; download (5 kb), password: crackmes.de or browse.

simasce has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

trope's Internal KeyGenMe

Download InKeyGen2.zip, 1 kb (password: crackmes.de)
Browse contents of InKeyGen2.zip

A few tasks needed to solve this. Internal KeyGen it, and remove some restrictions on user input. Good practice for all I think!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 29. Mar, 2005
Downloads: 1330

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by yudi, published 16. jul, 2008; download (97 kb), password: crackmes.de or browse.

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Solution by ReWrit, published 15. jul, 2008; download (5 kb), password: crackmes.de or browse.

ReWrit has rated this crackme as quite nice.

Solution by TiGa, published 04. apr, 2005; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

trope's SafeCracker 2.0

Download SafeCracker2.zip, 96 kb (password: crackmes.de)
Browse contents of SafeCracker2.zip

Ok crackers - too many of you got into my last safe. I had to build a BIGGER, STRONGER safe this time.

I have a ton of loot in the safe this time, so I had to devise new security systems. Beware of invisible lasers, and pressure sensative mechanisms attached to the safe!

Have a look at the screenshot in the Zip file to see if you are up to even trying this safe. Failure will wind you up in the poke!

Good Luck Crackers!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 23. Sep, 2005
Downloads: 1139

Rating

Votes: 7
Crackme is quite nice.

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Solutions

Solution by NoRG, published 24. sep, 2005; download (157 kb), password: crackmes.de or browse.

NoRG has rated this crackme as nothing special.

Discussion and comments

trope Author 23. Sep 2005	Just to clarify... You can only patch any anti-debug related code. Otherwise too, easy know what I mean? Thanks, Trope
Shism 23. Sep 2005	Fun crackme....
code_inside 23. Sep 2005	Nice CrackMe :) A bit more difficult then the previous one but still easy ;) I like those little things with the sound and the banging, hehe ;)
trope Author 24. Sep 2005	To be honest, I am being a bit selfish in submitting these crackmes: 1. I am very interested in assembly, so 2. I practice writing these crackme, and then 3. Reverse my own code. The best of all worlds, so to speak! And as a bonus, I get to see how the pros cracked my code, and I study that too! :) Trope
Lesco 25. Sep 2005	Yes, funny and easy crackme. @trope: Will there be further versions? i hope so.
trope Author 25. Sep 2005	SafeCracker 3.0 in the works! I over-rated this last one as a 3, it actually was 2. 3.0 will be a 3 in difficulty. THE SAFE WILL BE STRONGER! ;) Thanks for 'playing' ! ~ Trope
MaxM 25. Sep 2005	waiting for it:)
MaxM 25. Sep 2005	ps: change the rate to 2, so ppl looking for rate2 cm could find it
trope Author 25. Sep 2005	Hey guys (gals) remember I am a N00b1e at this, so if you rate(d) my crackme a 1, or whatever, saying it sucked, let me know WHY so I can improve on my code, know what I mean? There will be no hard feelings, I assure you, but it would be nice to know why people rate it low. Learning every day.... ~ Trope
MaxM 25. Sep 2005	None said it sucked, ppl found it nice, as you can see from comments. I would rather say the opposite. They just strive for next one, hoping better, stronger etc. [ad] well, why not making exact, targeted questions on community? [/ad]
MaxM 25. Sep 2005	"I would rather say the opposite." means it does not suck.
deroko 25. Sep 2005	Hi trope, noone will tell you what's wrong with it, some people just rate crackme depending on it if they can or can't solve it... and for the record I didn't rate it =)
MaxM 25. Sep 2005	Nor I :) Dont worry of the vote, worry of the relevant opinions and pm suggestions you receive ...and so, be happy, your work is appreciated :)
trope Author 26. Sep 2005	lol - ok guys, thanks! I like this place, and so far everybody is so helpful.
trope Author 11. Mar 2012	Hi guys, it's been a LONG time. Back though, and back on the SafeCracker series again!

trope's Safecracker 3

Download safe3.zip, 6 kb (password: crackmes.de)
Browse contents of safe3.zip

My safe has gotten a bit stronger! Not only do you need a combination, but more!

There are numerous security features you will have to get by or disable. If you do, you'll be presented with "riches beyond your wildest dreams!" ;)

Ok a few rules for cracking this baby:

1. You have to let the safe *tell* you when it's cracked. There is a button on it that says "Check Safe Strength" , as well as a progress meter. So for instance, if you think that you must disable a control, and that was correct, when you press the "Check Safe Strength" button, the progress meter will go down a little.

When you get the safe's strength to zero, the OPEN SAFE button will appear and you have cracked all the security features. Simply open it to win!

2. You cannot patch to get to the good guy message.

3. Write a KeyGen for the Combination. Should be over 1000 valid combinations.

4. If you are really ambitious, write a loader for the program (similar to NoRG's solution for my Safecracker 2).

GOOD LUCK. I HOPE YOU PACKED A LUNCH...

THATS IT! HAVE FUN...

Trope

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 27. Apr, 2006
Downloads: 698

Rating

Votes: 4
Crackme is quite nice.

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Solutions

Solution by mucki, published 15. may, 2008; download (180 kb), password: crackmes.de or browse.

mucki has rated this crackme as quite nice.

Discussion and comments

Lesco 27. Apr 2006	Funny crackme, but i have a question: I solved it, but I'm not sure, wether some things are allowed. May we patch the subclassing of the check box? May we enable the other checkbox with a resource editor? Is there another way, than patching or using an external program(SetWindowTextA), to alter the status text?
trope Author 27. Apr 2006	Great Catch! Yes, patch away at the subclassing. I am very impressed you caught it. Use resource editors, sure. I would like to someone 58h to 50 though. ;) Not sure about the status text. I know how I would do it, but... whatever will get the job done!
HMX0101 17. Jun 2006	This crackme isn't working for me...
BaKaE 20. Jul 2006	hello there --> this proggie doesnt work :-( --> please fix it (i've got xp sp1)

trope's Trope's CrackMe1

Download trope1.zip, 25 kb (password: crackmes.de)
Browse contents of trope1.zip

This one should be great for newbies. Strictly WIN32 here, no bloated code.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 09. Dec, 2004
Downloads: 1960

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by Pr3dat0r, published 22. jul, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by LuCiFeR, published 09. dec, 2004; download (865 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

zhaogui 06. Oct 2013	This one is easy,but I think it's useful to me.Because it's the first crackme I have done.I think it's so intresting!

trope's Trope's SAFE cracker #1

Download safe.zip, 1 kb (password: crackmes.de)
Browse contents of safe.zip

Just find out the combination to this virtual safe. Should be fun for the newbies. The pros SHOULD have this one cracked in under 5 minutes. For the Pros the challenge should be speed here!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 19. Sep, 2005
Downloads: 1754

Rating

Votes: 9
Crackme is nothing special.

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Solutions

Solution by nonzenze, published 19. sep, 2005; download (1 kb), password: crackmes.de or browse.

nonzenze has rated this crackme as nothing special.

Solution by Ox87k, published 19. sep, 2005; download (2 kb), password: crackmes.de or browse.

Ox87k has rated this crackme as boring crap.

Solution by deroko, published 19. sep, 2005; download (1 kb), password: crackmes.de or browse.

deroko has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

Ox87k 19. Sep 2005	yeah, so funny but the difficult it's 1 of 9 and not 2/9 ;)
trope Author 19. Sep 2005	gotcha - it's a 1 then. The next in the safe series will be harder, promise! :p
nonzenze 19. Sep 2005	nice idea, trope. it was a pleasure ;-}
SasukeHa 19. Sep 2005	why is it closed :\ only 1st 3? i've cracked it nice but easy one
trope Author 19. Sep 2005	Thanks to all for trying my Safe crackme. I look forward to coding more. Actually... Safe #2 almost done!
paradox 20. Sep 2005	Haha was a good way to get back into reverse engineering, a little different I liked it
deroko 20. Sep 2005	@paradox: waz up =)
deibiz_xxl 21. Sep 2005	SAFE #1 is fun, i'm a newbie and I have solved it... very fun and interesting
tree 23. Sep 2005	That was easy. but fun
siupetpet 08. Oct 2005	oh yeah, super newbie at work (me) :) this is the first crackme i solved all by myself hehehe thank you very much trope for such great learning material!! btw it took me 1 hour though LOL
trope Author 28. Oct 2005	good job siupetpet! Congrats!
Hybr!d 08. Dec 2005	Yeh Very nice one man... This is also first one I done by my self. Im learning slowly slowly..
Jailani 12. May 2006	It was really nice one I signed in after a long time
forcefield 14. Aug 2006	This is a very good one for beginners like me ^^ took me like 15 minutes :/

tryger's keygen_rivendel

Download rivendel.zip, 4 kb (password: crackmes.de)
Browse contents of rivendel.zip

Keygen me, please. Maybe I am broken, or not...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 22. Apr, 2015
Downloads: 205

Rating

Waiting for at least 3 votes
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Solutions

Solution by bat.serjo, published 10. jun, 2015; download (49 kb), password: crackmes.de or browse.

bat.serjo has rated this crackme as quite nice.

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Discussion and comments

fdjkf 07. Sep 2015	It seems strange,will the program read the bit beyond the username's length?
fdjkf 19. Sep 2015	sorry,what i see is wrong!

tsc's rsa-me

Download rsacrak.zip, 80 kb (password: crackmes.de)
Browse contents of rsacrak.zip

public-key algorithms in name/code prote...

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jul, 2002
Downloads: 1760

Rating

Waiting for at least 3 votes
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Solutions

Solution by kRio, published 29. jun, 2005; download (11 kb), password: crackmes.de or browse.

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Solution by acid_burn, published 11. jul, 2002; download (2 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

tscherno's Vault

Download hackme.zip, 8 kb (password: crackmes.de)
Browse contents of hackme.zip

Instruction:

1.) Override the password protection and get the secret message!
2.) The code that prints the secret Message on the Console also defines
a variable. Get the content of this variable.

3.) Write Tutorial

Hints:

*Bruteforce is not necessary.
*Everything is allowed

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 14. Apr, 2008
Downloads: 259

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Stardust, published 23. aug, 2010; download (13 kb), password: crackmes.de or browse.

Stardust has rated this crackme as nothing special.

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Discussion and comments

MulleDK13 07. Jun 2008	As far as I can see, this will shut down whether you put the right password or not.
strelok 09. Jun 2008	is there a way to get a password? bruteforcing sha256 ?
strelok 09. Jun 2008	password is not necessary for this crackme, just skip the check routine and extract cyphered assembly

tvk6843's Keygen

Download keygen.zip, 3 kb (password: crackmes.de)
Browse contents of keygen.zip

The wrong solution is reported as a wrong computation, for example: 1 + 1 = 3
The correct solution is reported as a correct computation, for example: 15 + 28 = 43

Exercise: write keygen

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 22. Dec, 2014
Downloads: 153

Rating

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Solutions

Solution by mrmacete, published 06. jan, 2015; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

pachuli
04. Feb 2015

1).

80486b7: c7 04 24 30 8b 04 08 mov DWORD PTR [esp],0x8048b30
80486be: e8 9d fe ff ff call 8048560 <printf@plt>

2).

(gdb) x/s 0x8048b30
0x8048b30: "Your solution is %d + %d = %d\n"
(gdb)

3).
int or short a = 0;
eax = a;
int or short b = eax;
eax = b;
int or short c = eax;
eax = c;
int or short d = eax;

DWORD PTR [esp] = 0x8048b30: "Your solution is %d + %d = %d\n" ????????

printf, need edi = 0x8048b30, and esi.

tvk6843's Keygen #1

Download tvk_crackme_2.zip, 3 kb (password: crackmes.de)
Browse contents of tvk_crackme_2.zip

Please write a keygen.

Attn: the app can crash :-)

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 31. Dec, 2014
Downloads: 508

Rating

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Solutions

Solution by mrmacete, published 06. jan, 2015; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

pachuli 04. Feb 2015	80489f7: c7 04 24 b0 8a 04 08 mov DWORD PTR [esp],0x8048ab0 80489fe: e8 3d fb ff ff call 8048540 <puts@plt>

tweety100's tweety's Serialme

Download Crackme.zip, 104 kb (password: crackmes.de)
Browse contents of Crackme.zip

This Serialme is wirtten in C++, and need a name and two serials.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 24. Apr, 2010
Downloads: 1821

Rating

Waiting for at least 3 votes
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Solutions

Solution by dacorp8007, published 05. may, 2010; download (5 kb), password: crackmes.de or browse.

dacorp8007 has rated this crackme as boring.

Send a message to TWiST »

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Discussion and comments

sd333221 30. Apr 2010	Easy one :-) Was fun while it lasted
Lacey 30. May 2010	Yeah, that was easy.
shadowstruk 09. Jun 2010	Good for beginners, like me.
myllan 11. Dec 2010	I can't download this file - infected with Win32/Agent.GJRKLQY (reporting by NOD32)
draww 11. Dec 2010	@myllan: probably false alert, avast5 says nothing.. [CompilerDetect] -> MinGW

TWiST's Crackme

Download CrackMe.zip, 157 kb (password: crackmes.de)
Browse contents of CrackMe.zip

Hi,

Welcome to this crackmes. I hope you'll enjoy it.

Your objective is to make a working Keygen for it!
No selfkeygen or Patch please! Just a Keygen!
I made a keygen by myself and it shouldn't be that hard :-).

Bye!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 02. Apr, 2006
Downloads: 1186

Rating

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Solutions

Solution by Ox87k, published 06. apr, 2006; download (38 kb), password: crackmes.de or browse.

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Solution by HMX0101, published 06. apr, 2006; download (29 kb), password: crackmes.de or browse.

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Discussion and comments

Ank83 02. Apr 2006	Hello ! I'm at the airport in Praga. I will be home tomorow. I can wait to solve this keygenme ! l0calh0st, HMX0101, EsKiMo I'm BACK ! :) Greets to all members of this site. Regards Ank83
Ox87k 02. Apr 2006	but... insert a casual name and a serial and: boom! Messagebox with Congratulations and after the right error's messagebox. I think there is a little bugz ;) ps: hi ank83 :D
TWiST Author 02. Apr 2006	@Ox87k: Yeah I'm sorry, that isn't a bug. It was a little joke from me, When the serial is not correct, a messagebox pops-up, telling "Congratulations" and right after that a message telling you it wasn't right. So, that Congratulations shit is just a joke ;). That's the badboy. The goodboy is: "Well done! Now write a tutorial and submit it on CrackMes.de!" I;'m sorry, that was a bit confusing ;).
Ox87k 02. Apr 2006	yeah yeah! is very very easy to solve... thanks for your work! I'm waiting for something more difficult and maybe not in vb :P
HMX0101 02. Apr 2006	Hi Ank83... I'm waiting for you back...
astigmata 02. Apr 2006	try my bruteforceme Ox87k ;) VB is not always easy (example: the size of the window is generated with a correct key or a dongle) but in this crackme, fishing or rip asm are possible
Ox87k 02. Apr 2006	rip asm? nooooo!! is very very very easy! astigmata: ur bruteforceme is impossible :P (...years!)
HMX0101 02. Apr 2006	What??? surely this is a joke, rip asm!!!
l0calh0st 03. Apr 2006	Not running on my pc.....Got messagebox "Unexpected error"........Is this trick for crkme :P............Winxp sp2 here
TWiST Author 07. Apr 2006	@l0calh0st Damn I think I somehow fucked up something with the form_load thingy. Does anyone else have this problem too ?
AppzCracker 08. Apr 2006	There is a bug in this problem (very big one I think Twist has overlooked a very basic error checking) : If Mid(...) function returns a null string then the app crashes badly { TWiST you know why ,, Asc("") ? ;-) }
TWiST Author 09. Apr 2006	Yes, you're right I didn't test that ;). You can just leve the input box empty, or enter something not longer than 3/4 characters. It will crash indeed ;-). I should have used something like this; If Len(StrInput) => 5 Then 'Now it will only continue when 'it's more than 5 chars ;). Code Else MsgBox "Please enter at least 5 chars!" 'If it's less than 5 chars, msgbox will pop asking you for at least 5 chars :-). I'm sorry ;-)
Little_Brother 01. Mar 2007	Well, is for n00bs. But nice for beginners. VB labels.. gotta love em!
saitob 04. Mar 2007	Well, took me 20 sec to finish this one. (including opening smartCheck etc.. ;D) Tip: Make a challenge #2, but this time upgrade your algo by doing some math or something with the Asc :P... Just a suggestion. Happy Cracking/Coding ~ Saibot

TWiST's CrackMe #2

Download CrackMe#2.zip, 160 kb (password: crackmes.de)
Browse contents of CrackMe#2.zip

Hi,

Welcome to this crackme.

Your objectives are:
1) Create a keygen for it
2) Remove the starting nags, and the 'Will you patch me too" nag :-). The other nag will be removed when you enter a valid serial :-)
3) Replace the XXXXXXXXX with your name

I hope you'll enjoy it!
Bye!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 06. Apr, 2006
Downloads: 800

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Solutions

Solution by HMX0101, published 12. apr, 2006; download (190 kb), password: crackmes.de or browse.

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Discussion and comments

saitob 04. Mar 2007	I can see that you had some fun with msgboxes. :D Done btw

TwistedTux's First keygenMe

Download keygenme.tgz, 2 kb

My first KeygenMe so don't be rude :)
I had fun to write it and i think it's pretty easy.
Rules: no patching, write a keygen.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: C/C++

Published: 17. Aug, 2014
Downloads: 409

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by cym13, published 09. sep, 2014; download (1009 b), password: crackmes.de or browse.

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Solution by LeoC, published 09. sep, 2014; download (885 b), password: crackmes.de or browse.

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Solution by baderj, published 09. sep, 2014; download (238 kb), password: crackmes.de or browse.

baderj has rated this crackme as quite nice.

Solution by mre521, published 09. sep, 2014; download (10 kb), password: crackmes.de or browse.

mre521 has rated this crackme as quite nice.

Solution by AntonDevil, published 09. sep, 2014; download (438 kb), password: crackmes.de or browse.

AntonDevil has rated this crackme as boring.

Solution by LinSkull, published 09. sep, 2014; download (888 b), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

mre521 21. Aug 2014	pseudo: mre521 clef: ob-9Sy This may not work on all systems because different implementations of rand() and srand() may give different output and hence different clef for the same pseudo.
baderj 25. Aug 2014	pseudo: sheldon clef: IJpj4H

ty123's Crackme #1 (fixed)

Download crackme1fix.zip, 33 kb (password: crackmes.de)
Browse contents of crackme1fix.zip

ID/serial, few anti-debugger code

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. May, 2004
Downloads: 1235

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Solutions

Solution by Oorja-HalT, published 07. may, 2004; download (4 kb), password: crackmes.de or browse.

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Solution by Plasmator, published 03. may, 2004; download (72 kb), password: crackmes.de or browse.

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Discussion and comments

ty123's Crackme #2 (fixed)

Download crackme2fix.zip, 3 kb (password: crackmes.de)
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ID/serial, few anti-debugger code

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. May, 2004
Downloads: 1101

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Solutions

Solution by Oorja-HalT, published 07. may, 2004; download (5 kb), password: crackmes.de or browse.

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Solution by Plasmator, published 04. may, 2004; download (16 kb), password: crackmes.de or browse.

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Discussion and comments

ty123's Crackme #3

Download crackme3.zip, 4 kb (password: crackmes.de)
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Regfile/Keyfile protection

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 23. Apr, 2004
Downloads: 1009

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Solutions

Solution by ShadowKat, published 01. may, 2004; download (5 kb), password: crackmes.de or browse.

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ty123's Crackme #3 (fixed)

Download crackme3fix.zip, 4 kb (password: crackmes.de)
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Regfile/Keyfile protection

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. May, 2004
Downloads: 1159

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Solutions

Solution by Plasmator, published 11. may, 2004; download (32 kb), password: crackmes.de or browse.

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Solution by Oorja-HalT, published 10. may, 2004; download (8 kb), password: crackmes.de or browse.

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Tymon's Official HTBTeam Trial Crackme

Download tymon_htb_trial_crackme.zip, 14 kb (password: crackmes.de)
Browse contents of tymon_htb_trial_crackme.zip

This is my old crackme, which I wrote long time
ago for my friends from HTBTeam. It's quite easy
but you'll have to think (compute;)) a bit to solve it :)

Of course crackme is expired, so solution is welcome.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 02. Apr, 2008
Downloads: 407

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Solutions

Solution by ejube, published 06. apr, 2008; download (17 kb), password: crackmes.de or browse.

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Discussion and comments

apuromafo 02. Apr 2008	amm aspack 2.12~
Tymon Author 03. Apr 2008	Is there any problem with aspack ???
DigitalAcid 04. Apr 2008	No, piece of cake to unpack it :P.
TiGa 04. Apr 2008	Usually, commercial packers are a big no-no but unpacking it was a part of the trial.
Tymon Author 04. Apr 2008	But unpacking aspack 2.12 is very easy now. Just download aspackdie by y0da.
Ox87k 04. Apr 2008	C'mon guys, it's level 3 so it suppose that who try it knows also how to unpack ASPack!
ejube 06. Apr 2008	back of the net
Tymon Author 06. Apr 2008	Congratulations ejube!
ejube 07. Apr 2008	Cheers. It was good fun.

Typhoon's 6? levels

Download bomb.zip, 139 kb (password: crackmes.de)
Browse contents of bomb.zip

This crackme is good for begginers he has multiple levels every level is more defficult than the other.
I added PDB file.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 10. Jan, 2015
Downloads: 490

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Solutions

Solution by c0d3inj3cT, published 22. jan, 2015; download (4 kb), password: crackmes.de or browse.

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Solution by downabc, published 22. jan, 2015; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

kopumns 11. Jan 2015	Pretty simple, just changed a few jumps and filled some statements with NOPS.
meisterlumpi 11. Jan 2015	The goal is to find the passwords, not to alter the code.. I got two so far, with the third one it's getting kind of difficult.. at least for newbies like myself.
Delirium 18. Jan 2015	There's also a secret level. Good luck.
elhomer 02. Feb 2015	Got all 6 passwords ... just need to figure out the secret level.
r4ziel 27. Mar 2015	Peace Sells... but Who's Buying? H1274A6M 1 2 6 24 120 720 6 l 337 9 2048+L2L23 2 5 3 4 2 3

ubique.daemon's crackme #1

Download ub_crackme1.zip, 8 kb (password: crackmes.de)
Browse contents of ub_crackme1.zip

serial (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 01. Jun, 2000
Downloads: 1569

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Solutions

Solution by kamikaze, published 01. jun, 2000; download (2 kb), password: crackmes.de or browse.

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Solution by ^heiko, published 01. jun, 2000; download (3 kb), password: crackmes.de or browse.

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ubique.daemon's crackme #2

Download ub_crackme2.zip, 6 kb (password: crackmes.de)
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name/serial (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 01. Jun, 2000
Downloads: 1405

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Solutions

Solution by kamikaze, published 01. jun, 2000; download (1 kb), password: crackmes.de or browse.

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movzx 03. Jun 2008	err.. bug found.. this crackme keep thinks that its still running with a debugger, even there is no debugger running...
DigitalAcid 03. Jun 2008	Yes, i see the bug also. I think author maybe made a typo or something. CMP DWORD PTR SS:[EBP-C],1 EBP-C = 00000001 So, it can never be correct :).
ultrasnord Author 04. Jun 2008	it detect debugger from registry,,, so even the debugger not running it still detect that debugger found,,,
ultrasnord Author 04. Jun 2008	to : movzx how about making tut?,,,
movzx 04. Jun 2008	err.. is this proggie runs normally on your computer?
movzx 04. Jun 2008	this proggie is trying to do a VirtualQuery for this address : 21E0680C another bug is.. if i enter the registration window, there is no way to terminate the proggie. alt-f4 only close the form, but not terminate the proggie...
costy 05. Jun 2008	it says "Remove the Breakpoint first", but i'm not using a debugger!
kao 05. Jun 2008	Solved in 10mins. It's all about using proper tools and one good breakpoint. So.. No tutorial this time. ;)
ultrasnord Author 06. Jun 2008	about the breakpoint : there are still a lot of bug in this proggie,,, i will submit a new version with new protection,,,, so,, just wait ok?!!! but i wait till someone submit the solution,,,
costy 06. Jun 2008	If you submited a new version, the solution would be deleted. So why someone should write a solution NOW?? I think it's better to send the new crackme first.
ultrasnord Author 07. Jun 2008	let think it's like trade,,, you give me the knowledge by submitting the solution and i'll give you new challenge by uploading new version,,,,
DigitalAcid 19. Jun 2008	@bswap: Couldn't you write a normal tutorial ? It's like searching an ant in a heap of ants and when you find it, you need special glasses to see it 8-).
Bswap 19. Jun 2008	nooooo, just pratice and follow.... No "ANT's" here.... Try is step by step.. just follow your code in OLLY
DigitalAcid 19. Jun 2008	Let me say it like this: Wich program do i have to use to see the actual tutorial ? I had to change the extension to unzip the file, then I had to find the tutorial wich was called "Document" or something... Looking at it with a text editor looks weird. The only usable stuff i see in there, are the 3 pictures. I like reverse engineering, but this is a bit extreme :P.
TiGa 19. Jun 2008	DOCX is Office 2007 I get enough complaints already when I reject solutions for good reasons. I'm not going to start rejecting them too for "Using an evil font". ;) @bswap: Could you resubmit with the solution saved as Word 2003? This format is compatible with OpenOffice too.
Bswap 20. Jun 2008	I will do it, sorry
apuromafo 21. Jun 2008	nice, not is a difficult cracked in some time, maybe can now have an registred version :) @costy maybe the getversion or some api can detect some..for RTDSC uff i like write but..not have time. and if have maybe my english is difficult of understand.. for docx word 2003+plugins is capable of read docx= .zip + xml just rename to .zip the .docx and unzip this file for see the originals values..(img etc) some tools as docx converter , can convert in rtf /doc in versions registreds or/nopeds :S see ya.
ultrasnord Author 01. Jul 2008	this is new version,,, redownload please,,, ...

ultrasnord's ultraskeygenme

Download ultraskm_fix.zip, 203 kb (password: crackmes.de)
Browse contents of ultraskm_fix.zip

ultras's KeygenMe
====================
Size : 406.0 kb
Code : Borland Delphi 7
Difficulty : 2

RULES :
1. No Patching At All
2. Keygen Is A Must

if you found any bug or want to give some suggestion,,
or you want to ask me,,
just email me at :

ultras_muhsin@yahoo.co.id

= sorry for my bad english =

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 01. Jul, 2008
Downloads: 456

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Discussion and comments

ultrasnord Author 01. Jul 2008	sorry guys,,, prev version has a noob bug,, redownload please,,, ...
ultrasnord Author 17. Jan 2009	has anybody works on it?,, ===================== = CrackMe Awaits solution =) = =====================

ultrasnord's ultras's 1st cm

Download ultrascm1.zip, 198 kb (password: crackmes.de)
Browse contents of ultrascm1.zip

ultras's 1st crackme
=====================
Size : 377 kb
Code : Borland Delphi 7
Difficulty : 3

You Have To Enabled the serial text box,,,
(by following the program rule or reverse it),,,
Then find the correct serial and/or make the keygen,,,

This is my 1st crackme,,,
so if you found any bug or want to give some suggestion,,
or you want to ask me,,
just email me at :

ultras_muhsin@yahoo.co.id

= sorry for my bad english =

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 14. Apr, 2008
Downloads: 859

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by EvOlUtIoN, published 20. apr, 2008; download (204 kb), password: crackmes.de or browse.

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Solution by IMPosTOR, published 20. apr, 2008; download (1943 kb), password: crackmes.de or browse.

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Discussion and comments

IMPosTOR 15. Apr 2008	very very easy to keygen lol to moderator: level = 3 ??????
yudi 16. Apr 2008	use ResHack for enable (RCData ---> TForm)
DigitalAcid 16. Apr 2008	Or type serials that are long enough to enable the boxes ;).
TiGa 16. Apr 2008	The author sets the initial difficulty. The difficulty level will be adjusted, if necessary, according to the solutions.
EvOlUtIoN 17. Apr 2008	Yeah, it is very very simple, lika a level 1. Keygen is one of easiest i ever seen, also patch for objects is really simple. as i can io will do a tute, i already done a keygen.
ultrasnord Author 18. Apr 2008	sorry everybody for wrong difficulty,, i will work harder from now,, thanx to appreciate,,
EvOlUtIoN 18. Apr 2008	I just uploaded my solution.
MulleDK13 09. Jun 2008	Why is this level 1? This should be at least 3!
ultrasnord Author 12. Jun 2008	maybe you should ask the admin,,,, lol...
DigitalAcid 12. Jun 2008	Levels are relative. This might be hard for some, it might be too easy for others...

ultrasnord's ultras's 2nd cm

Download ultrascm2.zip, 198 kb (password: crackmes.de)
Browse contents of ultrascm2.zip

ultras's 2nd crackme
=====================
Size : 378.5 kb
Code : Borland Delphi 7
Difficulty : 2

You Have To Remove The Nag Screen (By Patching It),,,
Then find the correct serial and/or make the keygen,,,

This is my 2nd crackme,,,
so if you found any bug or want to give some suggestion,,
or you want to ask me,,
just email me at :

ultras_muhsin@yahoo.co.id

= sorry for my bad english =

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 20. Apr, 2008
Downloads: 505

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Solutions

Solution by yudi, published 03. may, 2008; download (470 kb), password: crackmes.de or browse.

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Discussion and comments

yudi 22. Apr 2008	interesting use of current date ! easy :-)) i sent a solution !
DigitalAcid 23. Apr 2008	Yes, but removing the nag was a bit harder (without losing the about box) :).
DigitalAcid 03. May 2008	@yudi: your keygen works, but not for my name =). In fact, it doesn't seem to work for any names of length 8 or bigger.
yudi 04. May 2008	DigitalAcid 1) u are right ! I miss to put len(text1.text)*...... in my cod : anyway if u insert 7 character will generate a corect serial (eg.Digital), u can change it if u want 2) i work too hard to make a tut, keygen was the easy part 3) anyway this is the first working keygen for this crackme
hackereha 06. Sep 2008	i think the goal is making a keygen that generates a right serial for every lenght. any noob can code sth like this with doing 7 different algo.and that's why the goal is making a keygen that generates a right serial for every lenght.
lgtngstk 07. Sep 2008	yudi: looks like it would've been easier to just do the alg in asm. Good to learn a little VB though.

ultrasnord's ultras's 3rd crackme

Download ultrascm3.zip, 198 kb (password: crackmes.de)
Browse contents of ultrascm3.zip

ultras's 3rd crackme
=====================
Size : 377.5 kb
Code : Borland Delphi 7
Difficulty : 2

You Have To find the correct serial and/or make the keygen,,,

This is my 3rd crackme,,,
so if you found any bug or want to give some suggestion,,
or you want to ask me,,
just email me at :

ultras_muhsin@yahoo.co.id

= sorry for my bad english =

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 20. Apr, 2008
Downloads: 518

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Solutions

Solution by [xorolc], published 12. aug, 2008; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 20. Apr 2008	Very nice one :).
ultrasnord Author 30. Apr 2008	to:Here sorry for bug,, i found it,,but lazy to fix it,,lol,,, btw,, don't leave your code at forum,,

ultrasnord's ultras's 4th cm

Download ultrascm4.zip, 199 kb (password: crackmes.de)
Browse contents of ultrascm4.zip

ultras's 4th crackme
=====================
Size : 381 kb
Code : Borland Delphi 7
Difficulty : 3

You Have To find the correct serial and/or make the keygen,,,

This is my 4th crackme,,,
so if you found any bug or want to give some suggestion,,
or you want to ask me,,
just email me at :

ultras_muhsin@yahoo.co.id

= sorry for my bad english =

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 20. Apr, 2008
Downloads: 565

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Solutions

Solution by [xorolc], published 05. sep, 2008; download (26 kb), password: crackmes.de or browse.

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Discussion and comments

Zaphod 01. May 2008	I can find the serial for a name ( not my name, since it hasn't got the correct length ). This makes the text "UNREGISTERED" disappear and disables the register-button, but there are no congratulations or "Well done" or anything. ultrasnord, don't you know that we crackers like to be congratulated? Apart from that, a nice crackme...
ultrasnord Author 01. May 2008	"don't you know that we crackers like to be congratulated?" lolz,, sure i know it,, i dont make any congrat message to avoid search string reference become that easy,, if you done,, please submit the solution,, i want to know how my cm cracked??? thanx for appreciate

ultrasnord's ultras 5th cm

Download ultrascm5.zip, 201 kb (password: crackmes.de)
Browse contents of ultrascm5.zip

ultras's5th crackme
=====================
Size : 385.5 kb
Code : Borland Delphi 7
Difficulty : 3

To Do :
1. Remove Startup Nag Screen
2. Find Correct Serial And/Or Making Keygen
3. Remove Exit Nag Screen

This is my 5th crackme,,,
so if you found any bug or want to give some suggestion,,
or you want to ask me,,
just email me at :

ultras_muhsin@yahoo.co.id

= sorry for my bad english =

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 20. Apr, 2008
Downloads: 469

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Solutions

Solution by movzx, published 04. jun, 2008; download (210 kb), password: crackmes.de or browse.

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Discussion and comments

Zaphod 04. May 2008	Finding a serial and removing exit nag screen is easy, but removing the startup nag screen is another matter. I have gotten rid of the nag, but not the way it was intended, I'm sure. I patched the crackme so it works like this: 1. Speed up the progressbar so that it finishes immediately. 2. Made the program itself press the ENTER key. 3. Use SW_HIDE instead of SW_SHOWNORMAL, so that the LOADING-window is never shown. This way, when I doubleclick the program the real crackme is shown with a very slight delay, but I would like to see a solution where the startup nag is REALLY skipped...
ultrasnord Author 07. May 2008	to : Zaphod can you submit your solution,,, i would like to review it,,,
costy 07. May 2008	when I run the crackme on win xp It display a lot of messagebox saying '0:00:01' is not a valid time. I think it's a bug
DigitalAcid 07. May 2008	I got xp sp2 and get no error like that.
Zaphod 08. May 2008	I have XP SP1 - and no errors either. ultrasnord, it would be a waste of time to submit a solution since it would be rejected. I haven't made a keygen and I don't think I can ( solutions are rejected without a keygen, as you know ). And my way of getting rid of the startup nag is not a real solution, it is just a way around the problem, not good enough... But as I said I would like to see a proper solution, come on guys :)
ultrasnord Author 08. May 2008	"But as I said I would like to see a proper solution, come on guys :)" hahaha,, come guys everybody here is challanged to solve this,,,
movzx 04. Jun 2008	solved, check my solution

ultrasnord's ultras 6th cm

Download ultrascm6.zip, 205 kb (password: crackmes.de)
Browse contents of ultrascm6.zip

ultras's 6th crackme (Object CrackMe )
=======================================
Size : 400.5 kb
Code : Borland Delphi 7
Difficulty : 3

To Do :
1. Defeat Startup Protection (Patching Allowed Here...)(The protection Maybe Execute or NOt )
2. Defeat Level1 (the checkboxes and radio buttons),,Find The Correct Combination (No Patching)(no resource editor),,
3. Defeat Level2 (Trackbar),,Find The Correct Combination (No Patching),,
4. Defeat Level3 find correct password,,,(and defeat the protection),,,

This is my 6th crackme,,,
if you found any bug or want to give some suggestion,,
or you want to ask me,,
just email me at :

ultras_muhsin@yahoo.co.id

my next crackme will come late,,
because i will face test at my college,,
so be patient to all my fans :)..
lol,,

= sorry for my bad english =

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 27. Apr, 2008
Downloads: 413

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Solutions

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Discussion and comments

EvOlUtIoN 29. Apr 2008	I already done step 1 and step 2, i found step 1 boring and step2 quite nice... I thought also to solved step 3, but something wrong...do you know why? already passed all checks for characters, password is similar to your name ;-) but last check fails and no goodboy message appears withou8t patch...i'm in wrong way or it is normal?
DigitalAcid 29. Apr 2008	Yes, step 1 is easy, but it looks like it's using that "protection" in all steps. Step 2 was nice indeed, never tried something like that, but easily found the right combination (after finding the right code "by intuition") :). I stopped at step 3, maybe i should try a bit more :P.
DigitalAcid 29. Apr 2008	Ok, solved it. Another nice one. You've got very original crackme's :P I'll try to write a tutorial.
ultrasnord Author 30. Apr 2008	to:EvOlUtIoN you miss one protection beside "that protection",,, look carefully at code,,, you'll find it,,,,
DigitalAcid 03. May 2008	Hmm, i patched it, but my solution got rejected. Now all my patched versions are unpatched, wtf O.o... I must be crazy or my pc is acting weird, i don't know =). I will try to update my solution now, maybe i overlooked something.
DigitalAcid 03. May 2008	Heh, guess i didn't look good enough. Nice and easy protection. And another nice usage of the date in key =).
movzx 03. Jun 2008	nice one.. :D i love the trick..

ultrasnord's ultras_cm7

Download ultras_cm7.zip, 202 kb (password: crackmes.de)
Browse contents of ultras_cm7.zip

ultras's Crackme7
=================
Size : 387.5 kb
Code : Borland Delphi 7
Difficulty : 3, I Think.

To-Do :
1. Find Correct Password That Lead You To Good Boy Message.

RULEZ :
= No Patching.

Hint :
- Password Is HardCoded,, But.....

If you found any bug or want to give some suggestion,,
or you want to ask me,,
just email me at :

ultras_muhsin@yahoo.co.id

= sorry for my bad english =

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 10. Jul, 2008
Downloads: 444

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Solutions

Solution by simonzack, published 13. jul, 2008; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

Bispoo 10. Jul 2008	Not everybody has a c: drive you know... i for example dont have one.
ultrasnord Author 10. Jul 2008	sorry,, when i made this crackme,, i just think that any system will make 1st partition as c: drive,,,
ultrasnord Author 10. Jul 2008	@Bispoo Maybe You can modify it to redirect it to another drive,,,
Bispoo 10. Jul 2008	yes yes, absolutely. :)
Bispoo 11. Jul 2008	IRC? cant quite make it :P
PeterPunk 11. Jul 2008	Yes, IRC. With the 4 or 5 first lines, I though it was a skull with crossbones.
simonzack Moderator 11. Jul 2008	nice ascii art :p
ultrasnord Author 11. Jul 2008	good job dudes,,, how about making tut??,,, can't wait for it,,,
simonzack Moderator 11. Jul 2008	already uploaded :)

ultrasnord's ultras_decryptme1

Download ultras_dm.zip, 227 kb (password: crackmes.de)
Browse contents of ultras_dm.zip

ultras's decryptme
==================
Size : 442.0 kb
Code : Borland Delphi 7
Difficulty : 1-3

This Is My First DecryptMe so i'm not sure about difficulty,,,

RULEZ : - No Patching.
- BruteFOrce Allowed.

if you found any bug or want to give some suggestion,,
or you want to ask me,,
just email me at :

ultras_muhsin@yahoo.co.id

= sorry for my bad english =

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 10. Jul, 2008
Downloads: 320

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ultrasnord's ultras_decryptme2

Download ultras_dm2.zip, 195 kb (password: crackmes.de)
Browse contents of ultras_dm2.zip

ultras's decryptme2
===================
Size : 368.5 kb
Code : Borland Delphi 7
Difficulty : 1-3

To Do :
1. FInd Correct Combination For License File To Make It Say Registered.

RULEZ : - No Patching.
- BruteFOrce Allowed.

if you found any bug or want to give some suggestion,,
or you want to ask me,,
just email me at :

ultras_muhsin@yahoo.co.id

= sorry for my bad english =

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 10. Jul, 2008
Downloads: 320

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Discussion and comments

TPAC 03. Nov 2008	Okay First of all i did it but i had to patch it and it was easy. First i patched an address so that it will jump the liscense check to find if "It's buddy is there", then i patched a different address that made it think it had the right liscense file. when in fact it didnt even have the wrong one or for that sake an liscense file.! TPAC

ultrasnord's ultras riddle

Download ultrasriddle.zip, 210 kb (password: crackmes.de)
Browse contents of ultrasriddle.zip

just solve it ok???...

no patching at all,,

you don't need it,,,

this not that hard,,,

and give comment ok!!!,,,

i need it,,,

lolz,,,

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 02. May, 2008
Downloads: 416

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Discussion and comments

ultrasnord Author 27. May 2008	HINT : = DONT THINK ABOUT ALGO,,, = POSITION IS EVERYTHING HERE
DigitalAcid 27. May 2008	Ok, I took a look at this again and I can patch it now to reach the end. Don't know if I will find a valid solution though =). I'll continue trying some more now ;).
movzx 01. Jul 2008	solved in 15 minutes.. time to write solution.... it's all about positioning...
ultrasnord Author 01. Jul 2008	lol,,, told you...

ultrasnord's ultras_tril_1

Download ultras_tril_1.zip, 202 kb (password: crackmes.de)
Browse contents of ultras_tril_1.zip

ultras's Trilogi #1
===================
Size : 385.0 kb
Code : Borland Delphi 7
Difficulty : 1-2

To Do :
1. Find The Way TO GoodBoy Message.
2. No Patching.
3. Keygen Is optional [Only If You Can or Want Make It].

# - Don't Forget To Move On To ultras's Trilogi #2 After Beat This. 0(^_^)0

if you found any bug or want to give some suggestion,,
or you want to ask me,,
just email me at :

ultras_muhsin@yahoo.co.id

= sorry for my bad english =

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 01. Jul, 2008
Downloads: 553

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Solutions

Solution by [xorolc], published 11. aug, 2008; download (17 kb), password: crackmes.de or browse.

[xorolc] has rated this crackme as quite nice.

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Discussion and comments

simonzack Moderator 02. Jul 2008	easy, solved in 5 mins (had to check keyboard map for this one :S)
ultrasnord Author 02. Jul 2008	good job,, waiting for solution,,
DigitalAcid 29. Jul 2008	Nice one :). Too bad I can't write a solution because I can't keygen it.

Ox87k 13. Sep 2005	very good solution norg! Compliments! MsgBox with valid code is beutiful!!! :P :)
ultrasound Author 13. Sep 2005	indeed, this is how I can learn to improve my code... Ive now written its big brother, 'c++ crackme 2' which wont allow for self keygenning, or at least I hope, so now you should have to understand the full keygen routine :) an excellent example, NoRG, of attacking a programs weak spots :)
ultrasound Author 20. Apr 2006	crackme source code is available here: http://files.jmpeip.com/ultrasound/src/CPP1/

ultrasound's C++ Crackme #2

Download CPP_Crackme2.zip, 14 kb (password: crackmes.de)
Browse contents of CPP_Crackme2.zip

This is the follow on to C++ crackme #1..

An improved algorythm, anti-self keygenning code and would be a little harder to patch than the original..

still, a patch would be too easy, so please keygen it!

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 13. Sep, 2005
Downloads: 933

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Solutions

Solution by NoRG, published 14. sep, 2005; download (15 kb), password: crackmes.de or browse.

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Discussion and comments

ultrasound Author 14. Sep 2005	well done again to NoRG! I guess my anti-self keygenning code wasnt that good!!
ultrasound Author 20. Apr 2006	crackme source code is available here: http://files.jmpeip.com/ultrasound/src/CPP2/

ultrasound's C++ Crackme #3

Download CPP_Crackme3.zip, 14 kb (password: crackmes.de)
Browse contents of CPP_Crackme3.zip

This is now my 3rd crackme that ive written, again in C++!

I have learnt from my mistakes of the past and made this the hardest crackme yet..

There is some crypto in this one so I hope it takes you all longer to crack than my first 2!!

Again this is not for patching, make a keygen!

Enjoy :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 22. Sep, 2005
Downloads: 925

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by m@rio_crk, published 23. sep, 2005; download (76 kb), password: crackmes.de or browse.

m@rio_crk has rated this crackme as quite nice.

Solution by NoRG, published 23. sep, 2005; download (23 kb), password: crackmes.de or browse.

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Discussion and comments

ultrasound Author 20. Apr 2006	crackme source code is available here: http://files.jmpeip.com/ultrasound/src/CPP3/
trope 20. Apr 2006	For someone "learning" c++, you write some nice code! :)
ultrasound Author 20. Apr 2006	thanks, i hope you learn something from it! (just dont mind the messy coding :)

ultrasound's End Of the World!

Download EndOfWorld.zip, 19 kb (password: crackmes.de)
Browse contents of EndOfWorld.zip

Mission: You have found an electronic diary which holds the date to the end of the world along with a note on how to survive.

Unfortunately, the diary is huge and no-one knows where to find this date to read the instructions of how to prevent the disaster.

Another problem is that the owner of the diary has password protected its contents and the text is unreadable without the correct password!

Your task is to use your cracking and reversing skills to find:

- The date for 'the end of the world'
- Instructions on how to prevent it
- The password to the diary

Just patching or bruteforcing is not an option here, since the instructions are no good, without knowledge of the date!

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 01. Nov, 2005
Downloads: 960

Rating

Votes: 10
Crackme is quite nice.

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Solutions

Solution by merker, published 29. dec, 2005; download (14 kb), password: crackmes.de or browse.

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Discussion and comments

code_inside 31. Oct 2005	Nice CrackMe. But the CrackMe crashes because of a division by zero (When you type 1 char in the password field) in the uhm, Password-Date-Data-Decryption routine :)
code_inside 31. Oct 2005	A little correction from what I said above, It happens when you enter any other char then "a-z" in the password field (Atleast it crashed when I entered "1" :) ).
code_inside 31. Oct 2005	And it only happens when the first character is any other character then "a-z" ;) (Now I stop flooding this thread... ;) ).
ultrasound Author 31. Oct 2005	Hi Code_inside, thanks for reporting the bug, yes as you have mentioned I just tested and it will crash if the first character is not a-z, you can enter non-alphabetic characters at any other point in the password, as long as its not the first character.. I think i know why this is happening and I will fix this bug tonight when I get home.. Would you prefer me to upload the fixed version, or just leave it as it is, so as not to change the code that you have already reversed?
bigboss1988 31. Oct 2005	crackMe doesn't work ! Is it a trick? If it a trick i know it ;) 1-DebugBreak 2-IsDebuggerPreSent 3- etc...:D
ultrasound Author 31. Oct 2005	bigboss, yes you are correct, crackme will not run with a debugger running, you must disable this.. also debugbreak is correct :)
code_inside 31. Oct 2005	ultrasound, The bug isn't really a big problem but still it is a little bug ;) I don't think that you need to change the code a lot though, just a little check will probably do... :) You decide if you want to upload a fixed version ;)
ultrasound Author 01. Nov 2005	Bug now fixed, new version online ;)
ultrasound Author 17. Nov 2005	how is everyone getting on with this? i cant tell if people are downloading and then giving up or if people are hard at work! any comments on what youve done so far?
code_inside 23. Nov 2005	Hi ultrasound, At the moment i'm trying to reverse the Date Hash, but I think it can't be reversed because the date string doesn't always has the same length and that's a problem... :) I'm probably missing something again but right now I don't see a way of reversing it... I also don't know how to decrypt the strings, guessing? :) Has anyone else solved it? (Or one of the two parts?)
ultrasound Author 23. Nov 2005	glad to see your on with it.. I guess my packing and anti-debug tricks didnt cause you too much problem then, but at least the main part is :) good luck!
code_inside 24. Nov 2005	Packing and Anti-Stuff didn't cause any problems, especially not if you use SoftICE ;) It's always funny to see all those OllyDbg protections in CrackMe's when you're using SoftICE ;)
deroko 24. Nov 2005	I agree with code_inside about olly protection and sice =))))
ultrasound Author 30. Dec 2005	superb merker, well done!
Shism 30. Dec 2005	any documentation of the anti-debugging trick please?
merker 30. Dec 2005	@ultrasound : thank you, its a great idea to use a diary as crackme. @Shism : anti-debugging is under the law of Murphy : 1. protect your app against debugger A. 2. protect your app against debugger B. result : everybody uses debugger C.
Shism 30. Dec 2005	How about this one> My anti-debugging is under the law of Shism : 1.Protect against every single damn debugger
DeepBlue 31. Dec 2005	So Shism: Let me see how you write a protection against a non-intrusive Debugger? ;)
deroko 31. Dec 2005	haha non-intrusive =) I'm currently developing imprec plugin for nonintrusive debugging so I can fix imports in warranty's unpackme 3 =) @DeepBlue: I would check for hooks in kiuserexceptiondispatcher =)
DeepBlue 31. Dec 2005	u bastard :P ;)
Shism 31. Dec 2005	a non-intrusive Debugger is a Decompiler.....
DeepBlue 31. Dec 2005	Ever heard of Oraculums? ;) Search in google: Oraculums "eb fe"
Shism 31. Dec 2005	A loader.... There is always a way to defeat a cracking technique and there is always a way to defeat that anti-cracking technique... It goes on forever :)
strelok 28. Feb 2006	damn, i got all dates, but planned to write dictonary-based bruteforcer to get pass everything is even easier
ultrasound Author 20. Apr 2006	crackme source code is available here: http://files.jmpeip.com/ultrasound/src/EndOfWorld/

UnChapelierFou's var

Download var.zip, 312 kb (password: crackmes.de)
Browse contents of var.zip

Very simple crackme for beginners

Difficulty: 1 - Very easy, for newbies
Platform: Unix/linux etc.
Language: C/C++

Published: 09. Feb, 2016
Downloads: 920

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Solutions

Solution by Bit87, published 25. aug, 2016; download (1 kb), password: crackmes.de or browse.

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Solution by ahaggard, published 12. jul, 2016; download (2 kb), password: crackmes.de or browse.

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Solution by S!x0r, published 11. feb, 2016; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

specx 23. Feb, 08:58	it is in the bag :)
Bit87 01. May, 22:41	This is a fun crackme!! It was awesome!! A good challenge for all
brainacid 26. Jul, 22:19	I found it easy and Im a total complete n00b. Thanks, it was fun.

unicorn's Crackme1

Download crackme1.zip, 44 kb (password: crackmes.de)
Browse contents of crackme1.zip

Very simple crackme for beginners..........
Find the serial, thats all u have to do..........

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 18. Jun, 2006
Downloads: 1586

Rating

Votes: 10
Crackme is quite nice.

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Solutions

Solution by MiniMinou, published 27. jun, 2006; download (7 kb), password: crackmes.de or browse.

MiniMinou has rated this crackme as awesome.

Solution by c_07, published 22. jun, 2006; download (3 kb), password: crackmes.de or browse.

c_07 has rated this crackme as awesome.

Solution by Ank83, published 22. jun, 2006; download (8 kb), password: crackmes.de or browse.

Ank83 has rated this crackme as awesome.

Solution by znycuk, published 22. jun, 2006; download (4 kb), password: crackmes.de or browse.

znycuk has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

znycuk 18. Jun 2006	easy one, but serial calculation is cool... maybe i will write a solution
Ank83 18. Jun 2006	Hi I'm having some problems with this crackme. The code is clear and simple, but I think that this one has not have valid serial. Am I right or I got lost in the code. Did some one try it. Where did I went wrong ? Need some help. Thanks and Best Regards Ank83
znycuk 18. Jun 2006	it have a good serial, at least one. i've submitted a solution this am. ;)
c_07 18. Jun 2006	It took me forever to figure out the correct serial. I knew exactly what the serial verification algorithm was doing, but after a couple hours of trying to come up with one that fit the criteria -- including writing a bruteforce keygen in C++ -- I got pretty frustrated :). However, there is a correct serial (I think there is only one), that can be found by keeping in mind that the 10 digits of the correct serial MUST add up to 10 (I can't really explain the reason for this w/o a tutorial). If I would have known that in the first place it would have saved me a headache. :) Oh well. Great work unicorn!
Ank83 19. Jun 2006	Hm... I will look at it once more and am giving up - I will wait for solution. I know that the serial must be of 10 digits, and there is some procedures that countes how many number are repeating and stuff but I can't fully understand the critierium. I was so long hook on VB targets that I forgot how to use my barin. :) Best Regards Ank83
Ox87k 19. Jun 2006	unicorn but there is only one serial? I found only 1.
snat 19. Jun 2006	found one! great work
unicorn Author 20. Jun 2006	Yeah there is only one serial .Thank u all for trying this crackme.
megadoctor 27. Jun 2006	damn i cracked it... but it took me for about 2 hours...
MiniMinou 27. Jun 2006	Good one to start with if you are a newbie, the code is quite clear, must use your brain a bit to find the serial but there is nothing to complicated !
predador 26. Jul 2006	I put nopÂ´s in two lines to solve the problem...next level...newbie++...hehe
unicorn Author 31. Jul 2006	Patching is LAME.... U can find the serial if u have a working brain :)
EuSo 13. Nov 2006	o.O I edit "PUSH 0B" to "PUSH 00" an invert the 3 jumps from "jne to je" and "je to jne" and now its woks with any serial. As example: 1 :P ;)

unn4m3D_BR's unn4 Hard #1

Download unn4Hard#1.zip, 371 kb (password: crackmes.de)
Browse contents of unn4Hard#1.zip

Goal: Keygen
Packed: Not

Good lucky!

www.reversing4life.com
by unn4m3D_BR

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Borland Delphi

Published: 08. Apr, 2014
Downloads: 195

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Solutions

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Discussion and comments

lheer 08. Apr 2014	Product Key 1234567890123456789012345 Activation Key WFAIZ-B76+C-PPNI9-FGP42-DZECD Thank you~ unn4m3D_BR
botanyaki 08. Apr 2014	0123456789012345678901234 (UNICODE "XH9Z5-RIG?L-PWF8C-E4KU3-55IAH") Thank you.
botanyaki 08. Apr 2014	Look! I god "?" on Actkey XD
unn4m3D_BR Author 08. Apr 2014	Thanks to everyone who tried to solve my crackme. But, I'm still waiting for the solution .. :D []'s
draculaprof 09. Apr 2014	Memory keygen: http://pastebin.com/2uWhcsA8
draculaprof 09. Apr 2014	Oops...forgot to add in keygen: That Product key length should be 25
redoC 11. Apr 2014	Is SelfKeygen acceptable?
unn4m3D_BR Author 11. Apr 2014	redoC, isn't acceptable! Just keygen to solve it ;D Good lucky man! []'s
new_man 14. Apr 2014	i hope i found time to solve this. but for others that trying i say one thing that make that easily for you. use decompilers like IDR DECOMPILER it clear the whole A9828 (VA) function. you see there that every char in our product key locate at the 123456789......etc strings (locate the position by using pos function) and you see there a lot of info and you not lost in all that function (actually it's almost say exactly what going on there)
karma.954full 16. Apr, 19:18	By KarMa [954] ©Full Team BR6FV-XFDTB-S33L1-8WE5Q-BWS1L

Unregistered !'s [VB]PatchME

Download PatchME.zip, 24 kb (password: crackmes.de)
Browse contents of PatchME.zip

This is my 2nd Crackme !
It has 3 level. The general goal is Enable Control.
Have fun !
ps: sorryr... my English is bad...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 30. Apr, 2008
Downloads: 584

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by Xspider, published 15. jul, 2008; download (1097 kb), password: crackmes.de or browse.

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Solution by costy, published 07. may, 2008; download (260 kb), password: crackmes.de or browse.

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Discussion and comments

xylitol 01. May 2008	boring, if u want unlock that use vbreformer set interval 0 to the timer and etc...
Unregistered ! Author 01. May 2008	It's not only ... that, try to solve all level, pleasezz...
DigitalAcid 01. May 2008	I must agree, these "enablemes" are getting old. Once you know how to do it 1 time, you can do it for every crackme... The same thing with changing a text string. In fact changing a text string is easier :).
costy 06. May 2008	Hello the third button is difficult to enable. Also Using vbreformer. Anyway it is possible to add a dll to the import table of this crackme to execute some code enabling all objects?? Can anyone explain me witch tool I have to use?? Thank you on this site I learned a lot.
costy 07. May 2008	ok I cracked it. I sended the solution. But for me it's difficulty is 3. In particular i think that the third button is created at runtime because I can't see it with Vbreformer. It's difficult to enable a button created at runtime in visual basic. :-( So I used a little trick... Look at the solution if it will be accepted.
Unregistered ! Author 11. May 2008	Yeah ! man, the third button is created at runtime, exactly... GoodJob, crosty ! Wait for the next [VB]Crackme...
costy 11. May 2008	Ehm... Unregistered ! I'm costy. (you wrote crosty) :-(

Unregistered !'s VB P-Code Keygenme

Download Unreg_Keygenme.zip, 23 kb (password: crackmes.de)
Browse contents of Unreg_Keygenme.zip

Please crack it !

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 25. Apr, 2008
Downloads: 397

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Solutions

Solution by MACH4, published 27. sep, 2008; download (61 kb), password: crackmes.de or browse.

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Discussion and comments

DrPepUr 26. Apr 2008	I decompiled this and have a keygen but I think there is a bug, if the name length is greater than 5 it doesent work. I completly reconstructed the code that validates the serial aswell and it is having the same problem, I was just wondering if infact this was a bug or not, if not I would appreciate a PM of a working Name Serial combo with name > 5
DrPepUr 26. Apr 2008	Ammendment: some names > 5
Unregistered ! Author 28. Apr 2008	Oh... I don't know what the bug is But, I will try to fix it... Wait for me...

upb's keygenme 3

Download keygenme_sheg.zip, 17 kb (password: crackmes.de)
Browse contents of keygenme_sheg.zip

a keygenme, wonder if you can solve it ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 07. Jan, 2004
Downloads: 1026

Rating

Votes: 6
Crackme is good.

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Solutions

Solution by andrewl.us, published 03. nov, 2009; download (34 kb), password: crackmes.de or browse.

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Discussion and comments

upb Author 11. Oct 2006	:'( hope someone does it before its 3 year birthday
MulleDK13 04. Nov 2009	wow. No solution until 5 years later? :O
andrewl.us Moderator 04. Nov 2009	:) what other good crackmes lay forgotten and unsolved?
cobrasniper555 06. Nov 2009	Good solution andrewl.us! Great crackme upb!
simonzack Moderator 17. Nov 2009	cool solution I didn't use or/not with combos but I think just thinking in and/xor will do yeah i noted the resemblance too i think this is more of a lvl3

upb's push.the.pusher

Download push.the.pusher.fixed.zip, 38 kb (password: crackmes.de)
Browse contents of push.the.pusher.fixed.zip

This is a keygenme.
The objective is to keygen it.
2006.12.23 upb

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 08. Jun, 2009
Downloads: 787

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Solutions

Solution by andrewl.us, published 25. jun, 2009; download (42 kb), password: crackmes.de or browse.

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Discussion and comments

upb Author 06. Jun 2009	Yes, andrewl solved the keygenme and contacted me about the bug. I can confirm the bug exists, makes it impossible to get a goodboy response from it :S i will post a fixed binary
upb Author 08. Jun 2009	it's been fixed, you're welcome to try :)
obnoxious 27. Jun 2009	Gr8 Work andrewl.us. Must have been a real pain to solve this one :P

UsAr's UnpackMe

Download unpackme.zip, 18 kb (password: crackmes.de)
Browse contents of unpackme.zip

unpack this and delete the nag message box

Difficulty: 4 - Needs special knowledge
Platform: Windows 2000/XP only
Language: Assembler

Published: 07. Jun, 2007
Downloads: 797

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by EvOlUtIoN, published 19. jun, 2007; download (37 kb), password: crackmes.de or browse.

EvOlUtIoN has rated this crackme as boring.

Solution by deroko, published 16. jun, 2007; download (18 kb), password: crackmes.de or browse.

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Discussion and comments

deroko 10. Jun 2007	very nice, not that hard, but has some nice tricks. Took me around 30min to finish it :)
Zaphod 14. Jun 2007	I hope someone will post a solution to this one. I can make it work in Olly, but apart from that I have no idea what to do :(
mrmag 14. Jun 2007	yeah, please hand in your solution deroko. I fiddled around with this one for approx. 1 hour without even finding a way to make it run within olly. I hope I have some more time this weekend though -- to give it one more try ;)
deroko 15. Jun 2007	my solution is with sice, still want me to upload it?
UsAr Author 15. Jun 2007	Of course upload! I'm very want to read any solutions to unpacking this ;)
Shism 15. Jun 2007	dereko could you solve the crackme with ollydbg???
Shism 15. Jun 2007	dereko could you solve the crackme with ollydbg??? Just to see how it would be done... Please?
EvOlUtIoN 15. Jun 2007	i also solved crackme with ollydbg...i wrote a little tutorial but in italian language...UsAr knows it! It took me more or less time like deroko, but i avoided to cheat with memory protection.
deroko 15. Jun 2007	cheat with memory protection?
EvOlUtIoN 16. Jun 2007	Don't know...i attached my olly after NAG screen to solve it, because i found difficult to load it directly form olly, so i found OEP after messagebox. Don't know about memory protection used, or anti-debug i don't know...i bypassed all attaching with olly so in my opinion this was a very simple target!
mrmag 17. Jun 2007	@EvOlUtIoN: I did this as well at first -- but I am interested in the method(s) used to prevent me running this thing inside Olly right from the start (or should I say entry point? ;) ). @deroko: I am very interested in the anti-debug tricks used, so if you solved it using sice and found them I would enjoy reading your solution to give a basis on how to approach this thing with Olly once more.
EvOlUtIoN 18. Jun 2007	Sent my solution, i hope you'll like it
hardcoder 20. Jun 2007	@EcOlUtIoN , excellant tutorial mate, you rocked it today
EvOlUtIoN 20. Jun 2007	thanks hardcoder, anyway i think my solution is very simple...so i think this unpackme is 2 maximum 3 as difficulty
hardcoder 21. Jun 2007	one more thing hardcoder , why does image size change form E00 to bigger, and why you choose full Raw dump , why not fix image header. please tell me I want to know everything
hardcoder 21. Jun 2007	There is (I think) anti dump trick is used , please experts tell me how autor has implemented it.
deroko 21. Jun 2007	CreateFileW on itself by finding it's name in PEB->PEB_LDR_DATA. You obviously didn't read both solutions :)
hardcoder 22. Jun 2007	It's ok thanks
j00ru 24. Jan 2008	I've solved it in an unusual way hahaha ;-)) Since I had some problems with accessing the .exe content when program was running, I wrote a ring0 driver hooking the NtOpenFile and NtCreateFile syscalls ;D It's really making me laugh ;p
apuromafo 14. Jun 2008	other simple way is using the unpacker generic of deroko nice true, grat, see ya
Ox87k 14. Jun 2008	@j00ru: would be very interesting to see your solution and your sources... can you write it?

UsF's RaTz AzZ

Download crackme.zip, 51 kb (password: crackmes.de)
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Find the valid serial for this VB crack-me

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: (Visual) Basic

Published: 05. Feb, 2004
Downloads: 1181

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Solutions

Solution by kao, published 07. feb, 2004; download (1 kb), password: crackmes.de or browse.

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[v0!d]'s crackme01

Download vcrkme01.zip, 14 kb (password: crackmes.de)
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name/serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 26. Jul, 2001
Downloads: 2478

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Solutions

Solution by D4ph1, published 21. sep, 2005; download (394 kb), password: crackmes.de or browse.

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Solution by niftybitz, published 26. jul, 2001; download (16 kb), password: crackmes.de or browse.

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Solution by phueghy, published 26. jul, 2001; download (14 kb), password: crackmes.de or browse.

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Solution by tnhuan, published 26. jul, 2001; download (159 kb), password: crackmes.de or browse.

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[v0!d]'s crackme02

Download vcrkme02.zip, 10 kb (password: crackmes.de)
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serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 04. Nov, 2001
Downloads: 4328

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Solutions

Solution by D4ph1, published 22. sep, 2005; download (53 kb), password: crackmes.de or browse.

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Solution by gadhabi, published 05. nov, 2004; download (31 kb), password: crackmes.de or browse.

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Solution by code_inside, published 04. nov, 2001; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

v1ru5's CrackMe by v1ru5

Download crackme.zip, 16 kb (password: crackmes.de)
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serial, .....

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 25. Jul, 2002
Downloads: 1715

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Solutions

Solution by bRaiN_faKKer, published 03. oct, 2002; download (1 kb), password: crackmes.de or browse.

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Valenok's CrackME_v.0.5 by Valenok

Download CrackME_v.0.5._fixed.zip, 99 kb (password: crackmes.de)
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This is very interesting

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Borland Delphi

Published: 27. Aug, 2007
Downloads: 853

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Solutions

Solution by Kostya, published 17. sep, 2007; download (74 kb), password: crackmes.de or browse.

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Discussion and comments

Kostya 16. Sep 2007	..It not so hard to find first serial.. :) So, u can fnd it.. But the second serial, i think we need to patch it .. My solution in queue..
MaZeNsMz 25. Sep 2007	When I Open This crack me it extract 3 files in the root CrackME_v.0.5._fixed.exe.exe test.exe start.ini
DigitalAcid 27. Sep 2007	It generates 2 more files here, but I gave up on trying any further. Still, it looks like an interesting crackme indeed...

Vallani's KeyGenMe 4

Download KeyGenMe4.zip, 1739 kb (password: crackmes.de)
Browse contents of KeyGenMe4.zip

An older KeyGenMe of me, which waits still to get its first KeyGen :) .

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 03. Aug, 2009
Downloads: 739

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by qpt^J, published 13. aug, 2009; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

tamaroth Moderator 05. Aug 2009	Very nice, got kgen working just now, i'll submit my solution when i find time for it :)
Vallani Author 05. Aug 2009	I'll wait excited and hopefully for your solution :) .
kilobyte.asm 06. Aug 2009	Agreed, Very nice. Just trying to stop keygen from stack overflowing, there must be a condition I'm missing. Well Thanks Vallani.
xylitol 06. Aug 2009	the music remember me heroes of might and magic lol
pxor 07. Aug 2009	whats the different betwean riping your code or make it a selfkeygen ?
Vallani Author 08. Aug 2009	The difference lies in the simplifying of the code, which is possible.

Valliko's CrackME #1 by Valliko

Download VLK-CrackME#1.zip, 5 kb (password: crackmes.de)
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A very simple and somewhat crappy Keygen-/CrackMe written in C.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 22. Jan, 2009
Downloads: 1078

Rating

Votes: 4
Crackme is quite bad.

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Solutions

Solution by reinforce, published 04. mar, 2009; download (36 kb), password: crackmes.de or browse.

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Solution by br0ken, published 30. jan, 2009; download (18 kb), password: crackmes.de or browse.

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Solution by sk8r4life, published 30. jan, 2009; download (11 kb), password: crackmes.de or browse.

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Discussion and comments

shellwolf 23. Jan 2009	112228. u should pause for a while after goodboy message.
shellwolf 23. Jan 2009	[code] if (sn==algo1(name)) sucess else fail [/code] this is level1(No matter how complex algo1) [code] if (algo2(sn)==algo1(name)) sucess; else fail' [/code] this is level2.(No matter how simple algo1 and algo2)
Valliko Author 23. Jan 2009	Yeah, and there's other bugs too i think. This was however just a "test" from my side, to see how it would work. Im quite a novice when it comes to programming :) I'll probably keep uploading short CrackMe's and develop my skills that way, tune in for more :)
Valliko Author 28. Feb 2009	Nice to see people have submited some solutions, good job :)
Sergeus 04. Mar 2009	As you ask in your crackme I'm writing some comments. Not bed crackme:))!
Qrchack 02. Aug 2014	So, my simplest solution is to replace JNZ with JZ at 004013D6
Exorcist1 05. Mar 2015	Anderson 43760

valueforvalue's ValueforValue's Newbie KeygenMe #1

Download V4V_KeygenMe1.zip, 89 kb (password: crackmes.de)
Browse contents of V4V_KeygenMe1.zip

Just a simple newbie keygenme written in PureBasic, should be easy for someone with a little experience to keygen.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 09. Feb, 2016
Downloads: 865

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Solutions

Solution by acruel, published 11. feb, 2016; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

victordmelo 05. May, 01:13	It's not possible to resolve it, I guess. In the end I face a SHA-1 Hash a870ff2d4769bdae93c1e9efdfbbb200191e7141 There's another way to do it without bruterforcing this hash??? I can't find in internet a collision for it!
oXYgen 09. May, 17:23	@victordmelo Just a tip : try to take a look at the very start of the code ^^
Traxin 25. May, 22:50	Download for the .exe file isn't working for some reason.
hackz101 04. Jun, 04:00	open link in new tab @Traxin
Dwt1966 10. Jun, 13:22	Thanks for the help Bros. Im new at ckme
kechocgian 07. Jul, 03:19	Nice crackme, I didn't expect that username.
tinko00 26. Jul, 18:43	Very nice crackme, remembers you why to check every bit of code from beginning :D Thank you

VaZoNeZ's VaZoNeZ`s KeygenMe #1

Download CrackMe1.zip, 3 kb (password: crackmes.de)
Browse contents of CrackMe1.zip

Its very easy KeygenMe for Newbies.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 22. Jul, 2008
Downloads: 1330

Rating

Votes: 9
Crackme is boring.

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Solutions

Solution by mjones, published 26. jul, 2008; download (137 kb), password: crackmes.de or browse.

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Solution by Xspider, published 29. jul, 2008; download (445 kb), password: crackmes.de or browse.

Xspider has rated this crackme as nothing special.

Solution by costy, published 24. jul, 2008; download (63 kb), password: crackmes.de or browse.

costy has rated this crackme as awesome.

The submission of solutions is closed.

Discussion and comments

obnoxious 23. Jul 2008	okkkk it was easy!!!!!
~misunderstood~ 23. Jul 2008	think it´s a nice one for beginners :)
Mazrock 23. Jul 2008	Yea nice for beginners. They can see pure asm strings comparison =)
costy 23. Jul 2008	Nice. I like it.
Xspider 23. Jul 2008	yep is really nice and easy for newbies like me :p like it too :D
pidreq 24. Jul 2008	It's absolutely yummy!
mjones 25. Jul 2008	Would have been nice if the computed serial was alphanumeric, but not a big deal. Fun crackme, overall.
GR0B 29. Jul 2008	It was my first Crackme and left me hungry for more. Thanks VaZoNeZ
ViiX 30. Jul 2008	>_> I cracked it and got the number and I don't even know how I did it -.-
Xspider 30. Jul 2008	lol that's easy !!
Sent1nel 03. Aug 2008	Cracked and wrote a keygen. Posting it :D Had to write the output to file as well as stdio because sometimes it gives out weird characters (like triangles)
fo2w 03. Aug 2008	there is a (little)bug(?) that use cl which is part of a address.
Toxide 16. Sep 2008	Nice little KeygenMe. I really like the twist on the username. Wrote a keygen!
Musturd 24. Oct 2008	I made my first keygen ever! hxxp://rapidshare.com/files/156968785/Musturd_gen.exe.html It's made in C using the Win32API
izlesa 07. Dec 2008	nothing to say. Using address in generation of reg key is lol. sry for bad english ...
NeoCortex 08. Jun 2009	Finally made it '-.-
ringzro 09. Sep 2009	Ok, ok... got here too late, but found a solution. Since the submission is closed, I don't think it will harm to say that the serial is computed from the "VaZoNeZVaZoNeZ" string on which some computation based on the UserName's first character and the low byte of the string's address is done. Anyway, I didn't describe the whole algorythm here...
promix17 07. Feb 2011	I loved this CrackME!
ZiMMy 12. Feb 2011	It was easy The code is ".%5%!" (without quotes)
xxdepelxx 03. Mar 2012	#-!=-%*4(D&4,

VBCracks's VBCracks's crackme 1

Download CrackME.zip, 47 kb (password: crackmes.de)
Browse contents of CrackME.zip

Simple VB.NET HWID Protection System.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 03. Jan, 2011
Downloads: 755

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Solutions

Solution by kobac, published 04. mar, 2011; download (55 kb), password: crackmes.de or browse.

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Discussion and comments

Arkantos 03. Jan 2011	is there any readme about this Crackme.. I don't Understand What To Do?
draww 03. Jan 2011	an obfuscated assembly. probably it requires you to run it on your machine. no rules means: patch, keygen, etc. everthing is acceptable, right?
VBCracks Author 03. Jan 2011	Yes, it has obfuscated assembly. The objective is to take a screenshot of the form1. :)
VBCracks Author 05. Jan 2011	There are no rules you can try anything to crack it. Please write a solution if you do manage to crack it so I can see what to improve in V2.
Ruev 13. Jan 2011	You cannot pack/protect your assemblies with commerical protectors according to the rules here. Eazfuscator is not allowed. Regardless, this is easily cracked.
dmc15 13. Jan 2011	Got it deobfuscated, but i'm stuck after that. Waiting for a tutorial...
kobac 21. Feb 2011	Solution added. It tries to download string from invalid url -> on exception it closes form.
ideku_nih 16. Mar 2011	Unable to find version of the runtime to run this application.

V!ctor's Crackme False by V!ctor

Download CRACKME1.zip, 4 kb (password: crackmes.de)
Browse contents of CRACKME1.zip

This is my first crackme. so don't hate me...

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 05. Aug, 2008
Downloads: 532

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Solutions

Solution by br0ken, published 09. aug, 2008; download (21 kb), password: crackmes.de or browse.

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Discussion and comments

xylitol 06. Aug 2008	crash after bad boy
br0ken 06. Aug 2008	@Xylitol There is no crash. Make sure you have the info.nfo file in the same directory as the exe ;)
Xspider 06. Aug 2008	yeah make sure you have it ;) btw nice crackme V!ctor
hoppel 07. Aug 2008	When exiting the Programm it tells me im registered. But I couldn't find a serial that is acceptet by pressing the check button. Is it even possible to get a serial right message directly after pressing the button or can you only get it from the dll when exiting the program?
Zaphod 07. Aug 2008	I don't think it's possible to avoid seeing the badboy first.
br0ken 07. Aug 2008	I found a valid name/serial which says registered when I press exit. But as Zaphod said, you can't avoid seeing the first badboy.
br0ken 07. Aug 2008	I just realised this! Take a look at the readme. "P.S. There may be placed bags, so please, write me about it..." So I guess the badboy was intentionally placed there huh?
V!ctor Author 07. Aug 2008	To br0ken: "Take a look at the readme" It's tradition...
sn0wworld 10. Aug 2008	Nice crackme, looked at code and saw that good boy seemed impossible to get from key, then looked at board and found out verify occur after exit, so found dll and cracked.

V!ctor's OneDword

Download OneDword_by_V!ctor.zip, 2 kb (password: crackmes.de)
Browse contents of OneDword_by_V!ctor.zip

This crackme uses Self-Modified Code, but there is not SEH or
something else. So it will just crash if you enter wrong password.
It will crash also if you enter any password more than two times.
In OneDword is ONE right passwords.
Maybe there is more, I don't know.
If you find password, you will be very luck man!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 07. Aug, 2008
Downloads: 509

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by Taddy, published 13. aug, 2008; download (1 kb), password: crackmes.de or browse.

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Solution by [xorolc], published 12. aug, 2008; download (2 kb), password: crackmes.de or browse.

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Discussion and comments

DigitalAcid 08. Aug 2008	Is there no goodboy message ? I mean, after we found a right password. I found a password that doesn't crash the crackme. In fact there will be more than 1 possible password if there is indeed no goodboy =).
PeterPunk 08. Aug 2008	@DigitalAcid: If you type the right password you'll get the goodboy message: "This is rigth password!!!!!"
br0ken 08. Aug 2008	@DigitalAcid I think you have to find a pwd that shows the goodboy. Some passwords don't crash the cme, but as said in the description, if you press check again cme will crash.
DigitalAcid 08. Aug 2008	Ah, I didn't quite see the goodboy, but it's there indeed =). Pressing the checkbutton twice is because of the xor, i know :). More investigating to do...
_Ra_ 08. Aug 2008	By the way of patching, I did manage to make OneDword pop out the goodboy message. the password that I could retreive has some non-printable characters. I believe that such password is not what we are looking for...
br0ken 08. Aug 2008	@ Ra My calculated pwd has untypable (sp?) characters too :(
PeterPunk 08. Aug 2008	There's a typable password. I think it's unique and you just have to think a little to get it.
_Ra_ 09. Aug 2008	solved. nice one!
V!ctor Author 12. Aug 2008	[xorolc], this psw is not correct!
Ox87k 12. Aug 2008	V!ctor, i tried the [xorolc]'s password and for me it works fine :)
p1nasIAT 12. Aug 2008	[xorolc] and Ox87k; the password has to be typeable (ASCII 0x20-0x7E) - after all we do have a textbox. Solutions with non-typeable characters are not valid. This includes [xorolc]'s solution.
br0ken 12. Aug 2008	I think what Victor means is, the password must be typable.
Ox87k 12. Aug 2008	@all: ok guys but V!ctor didn't write this nowhere so maybe next time he should be more precise >In OneDword there is ONLY ONE right typeable passwords.
Xspider 12. Aug 2008	and why he didn't said that in RULZ ?!?!
DigitalAcid 13. Aug 2008	He did say it, but because his english is not so good, it's a bit hard to understand: "In OneDword is ONE right passwords."
V!ctor Author 13. Aug 2008	OneXor is version 2 of OneDword
Xspider 13. Aug 2008	hmmm i'll see :)
Taddy 13. Aug 2008	I did it :) There are 2 typeable passords.
obnoxious 14. Aug 2008	awesome crackme and a great tut @taddy
DigitalAcid 14. Aug 2008	So, there is now a total of 3 right passwords :).
p1nasIAT 14. Aug 2008	There are at least 4 typeable passwords (not including [xorolc]'s solution). Two of them are from Taddy's solution while the other two are quite self-explanatory looking at Taddy's code. I'll leave the mystery to you for now. I’ll submit a complete solution if no one else wants the credit. Also, none of the submitted solutions are per-definition correct as none of them exploit the entire solution set. This crackme can only be solved (both partly and fully) by brute-forcing. Using a bit of brains the number of possible instruction combinations can be lowered to an acceptable amount and then brute-forced to find the total solution set.
simonzack Moderator 14. Aug 2008	I'm not that good about x86 instructions I bruteforced through the memory to check the last bytes if the jump/call goes within destination range, then check if serial is typable But are there any other instructions that can somehow jump to another place?
DigitalAcid 15. Aug 2008	Push xxx + ret = jump xxx ;)
simonzack Moderator 15. Aug 2008	ah, ret exploits :p
p1nasIAT 15. Aug 2008	DigitalAcid that won't work here because push [address] is 4bytes in itself (which is all we have to work with). Opcode + address = 4 bytes. A ret instruction is 1 byte and so we need 5 bytes to generate these instructions.
Taddy 16. Aug 2008	"Push xxx + ret " wors here because we cann change 4 bytes + there is a 0xFFC3 after the 4th bytes. => our 4 bytes + 0xFF = push [adress] and c3 = retn but 0xD8 xor 0x68 (push) = 0xB0 is untypable character.
p1nasIAT 16. Aug 2008	Taddy - true, I was just talking from top of my head, didn't actually remember the exact bytes there. Looking at them now push is indeed a possibility.
Xspider 18. Aug 2008	@Taddy hi Taddy i'm still don't know how you find this E8 A2D1FCFF CALL 003D0260 can u tell me plz?!?!
obnoxious 19. Aug 2008	@Xspider the location is call 400260 or jmp 400260

V!ctor's OneXor (OneDword v2.0)

Download ONEXOR.ZIP, 2 kb (password: crackmes.de)
Browse contents of ONEXOR.ZIP

It's revision of OneDword cme.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 13. Aug, 2008
Downloads: 452

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by obnoxious, published 21. aug, 2008; download (81 kb), password: crackmes.de or browse.

obnoxious has rated this crackme as quite nice.

Solution by Taddy, published 21. aug, 2008; download (1 kb), password: crackmes.de or browse.

Taddy has rated this crackme as quite nice.

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Discussion and comments

obnoxious 14. Aug 2008	why does the About say "write patch....."?
MulleDK13 14. Aug 2008	Maybe because you have to patch it?
simonzack Moderator 14. Aug 2008	don't think so. It'll be too easy, I think it may be because his English is confusing
Xspider 14. Aug 2008	maybe you can patch it to display the password!
simonzack Moderator 15. Aug 2008	lol, that's impossible :p
Zaphod 15. Aug 2008	A tricky one, this crackme! I think I know exactly what's going on, there are several ways to get the Goodboy, but they all need 5 bytes - and we only have 4. I'm still scratching my head...
_raven 16. Aug 2008	@Zaphod: There is a 0xFF after the 4th byte, so you have 5 bytes.
obnoxious 16. Aug 2008	eh! guys i was just curious why he wrote that way even though he wont accept pathed solutions. btw it is easily solvable... stay tuned you will see a detailed tut on it :)
Zaphod 16. Aug 2008	raven, I know about the 0xFF byte ( and what it can do ), but I can't give eax a certain value using only 4 bytes. I have tried a lot of things like xchg and lods and whatever, but I always miss one byte.
obnoxious 16. Aug 2008	need some help Zapod?????
Zaphod 17. Aug 2008	obnoxious, I'm still searching for the right bytes, but if I don't find them, I'll just have to wait for your tutorial :)
obnoxious 21. Aug 2008	@Zaphod i hope every thing is clear now :)
Zaphod 21. Aug 2008	obnoxious: yeah, all clear now :) damn it, I just never thought of jumping outside the code section and back again - very neat, indeed :)
Xspider 22. Aug 2008	yeah ^^ btw thx obnoxious your solution was 100% clear xD
obnoxious 23. Aug 2008	Glad i could help :P

veneta's Crackme v22 (mini-psyho)

Download Crackme_v22_(mini-psyho)_veneta.zip, 54 kb (password: crackmes.de)
Browse contents of Crackme_v22_(mini-psyho)_veneta.zip

litle simple crackme with some crypto ... a litle bit tricky (i think)

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 19. Aug, 2005
Downloads: 776

Rating

Votes: 8
Crackme is quite nice.

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Solutions

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Discussion and comments

Orphankill 20. Aug 2005	Ok, I'm confused. I set a breakpoint on GetDlgItemTextA and I'm in. However, first you run all the letters of the name through some loop which does a whole bunch of stuff to each letter, then you run each letter of the entered serial through countless loops and then it goes on and on and on.... How much time do you think we have? Or maybe I missed something? A little nudge in the right direction would be nice :)
Knight 21. Aug 2005	If i'm correct (and if i can post this here) this crackme uses ElGamal (or somethink like that). Just problem is that numbers are too big, to solve it. P.S. I think those loops u are talking about are SHA-1.
TQN 21. Aug 2005	Yes, Knight. It is SHA-1, use Miracl library.
Tymon 21. Aug 2005	ElGamal-128 + SHA1. You have to compute a and M. One question... This message 'how nice you've defeat..' means that serial is good or not ? coz there is the second message in crackme 'My Congrats Serial correct now you...'. What do you think ?
veneta Author 21. Aug 2005	"My Congrats Serial correct now you..." is correct :) 1.ElGamal sign 2.surprise (my favourite board game ;)
veneta Author 21. Aug 2005	i think it's sufficient answer :)
pdrill 30. Aug 2005	This does not look like Elgamal and you dont need to solve DLP for it.
Knight 31. Aug 2005	3 people said that it is ElGamal (one of them is this crackme author) and u still think that it is not? :D
pdrill 31. Aug 2005	Elgamal sig is: y^a * a^b == g^M where a and b is the sig and M is the message to be signed. This is not what is going on here. This crackme computs y^a * a^M == g^b. Set a=p-1 and you get y^a == 1 mod p. The order of p-1 mod p = 2 so a^M can have two solutions, 1 or p-1. This gives us a 50% chanse to set y^a * a ^M == 1 mod p for anny message M. Now, if you set b=p-1 you get g^b == 1 mod p. So,, does this looks like Elgamal? I can see you discuss the solution here so I hope I dont do anything wrong by posting this. This will only get you like 30% into the solution so there should be much more to solve for you.
pdrill 01. Sep 2005	Finaly I got the correct messagebox :) Have you received a solution from anyone?
veneta Author 02. Sep 2005	great work pdrill :) your solution is first and at the time only solution :)
Zuma555 05. Dec 2009	I got it, and i submited a solution
jB_ 06. Dec 2009	Zuma555: your solution does not include the 2nd part of the crackme. You only solved the crypto problem.
_pusher_ 06. Dec 2009	jB: i checked quickly.. he seemed to have gotten the valid serials.. what did i miss ? :x
Zuma555 06. Dec 2009	The only problem of this crackme was the crypto problem... What else was there to solve?
Zuma555 06. Dec 2009	Btw Hello jB! ;)
jB_ 07. Dec 2009	_pusher_: check the veneta message : "2.surprise (my favourite board game ;)" There is a reversi game in the crackme. The ElGamal signature is the easy part.
_pusher_ 07. Dec 2009	right, think i have to reject your solution Zuma.. sorry :x Still.. i cant find any signs of any game at all :)
cyclops Moderator 07. Dec 2009	"how nice you've defeat E**** s****** (heh you know what ;))" is only half part. If you have a complete solution it will show "My Congrats Serial correct now you..." ;)

veneta's Insipid v1

Download insipidv1.zip, 20 kb (password: crackmes.de)
Browse contents of insipidv1.zip

litle / simple crackme ... tut + keygen please ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 17. Oct, 2004
Downloads: 1430

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Solutions

Solution by DrPepUr, published 23. apr, 2008; download (290 kb), password: crackmes.de or browse.

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Discussion and comments

andrewl.us Moderator 23. Apr 2008	From DrPepUr's tutorial: "...produces a 32 byte hash so it is JUST WHAT THE DOCTOR ORDERED" :)

mido_666 04. Aug 2005	My most sincere congrats both to the creator and the solver of this crackme. It was really interesting and instructive for a newbie like me. veneta: great job, man. A good crash-test dummy! DrSpliff: At last, one great tutorial. Thanks for the info about tools, and for explaining that good. (I managed to solve the second part without more help than your explanation to the first one).

veneta's MBE TRIAL CRACKME v1

Download MBEDESTv1.zip, 63 kb (password: crackmes.de)
Browse contents of MBEDESTv1.zip

This is official MBE trial crackme you should crack it if you want to join MBECrew ...
crackme have 5 protections in side (3 protections are bery easy to solve anotcher 2 are litle more dificult)
And one more thing don't be afraid of ip connection of this crackme becouse it only downloads actual "about" ...

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 01. Oct, 2004
Downloads: 1404

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Solutions

Solution by Spooky, published 15. feb, 2008; download (98 kb), password: crackmes.de or browse.

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tamaroth Moderator 08. Nov 2010	keygen sent in a pm, don't have enough time to write a sol.
H2SO4 10. Nov 2010	Can someone explain what LOOPD means?
tamaroth Moderator 10. Nov 2010	where the hell did you find loopd in that crackme? :o There's no instruction like that in asm even. Unless you mean LOOP itself?
VESA Author 10. Nov 2010	This instruction decrements the cx register and then branches to the target location if the cx register does not contain zero. ; “loop lbl” becomes: dec cx jne lbl (Art Of Assembly - Page 300)
tamaroth Moderator 10. Nov 2010	I stand corrected, LOOPD is exactly the same instruction as LOOP (decrements entire ecx rather than just cx)
HungrySNAKE 10. Nov 2010	can someone explain how to crack this one?
kretze 13. Nov 2010	username: kretze ID: 1841250164 Need some more work to find a good serial. Right now I don't see how to find one. I have to digg a little deeper.
hasherezade 14. Nov 2010	yeah, finding ID is quite easy.... (username: hasherezade, ID: 1250705268), but it's nothing in comparision to the serial hashing procedure. i wonder, should we brutforce it?
tamaroth Moderator 14. Nov 2010	No, you don't have to brute force it. just understand the code.
tamaroth Moderator 14. Nov 2010	sory for double post, cannot edit ;\ tamaroth ID: 3690938228 Serial: 68A0527747F00F73
keksdose 15. Nov 2010	Enter Name: iSolvedIt:) ID: 854540148 Serial: C5033370EA925445
VESA Author 29. Nov 2010	Nice tutorial Diabolito :)

vhly's JavaCrackMe #1

Download CM1.zip, 3 kb (password: crackmes.de)
Browse contents of CM1.zip

This is My first Java CrackMe,
and I UsE a Obfuscator do this.

Welcome to ReGEn this classfile to SourceFile

And I change this CrackMe display Information in English

But I hope the Chinese is Wide for World , this my wish.

GooodlucK for you!~:)

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Java

Published: 09. Jan, 2006
Downloads: 1251

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Solutions

Solution by m@[tador], published 12. jan, 2006; download (50 kb), password: crackmes.de or browse.

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Solution by Ank83, published 12. jan, 2006; download (6 kb), password: crackmes.de or browse.

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Solution by HMX0101, published 12. jan, 2006; download (29 kb), password: crackmes.de or browse.

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Solution by Kerberos, published 12. jan, 2006; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

Ank83 09. Jan 2006	Hi I don't want to sound like a dumbass but how do ypu start this crackme ! Is it compiled ? When I double click it it open WinAce archiver. How can I start the crackme ? Thanks Ank83
Kerberos 09. Jan 2006	Ank83: java -jar CM1.jar
Ank83 09. Jan 2006	damn ! I dont have JAVA on this machine ! Hm I think that DJ Java Decomipler will be of a big use for this crackme !
Ank83 09. Jan 2006	I always get this ! java.util.zip.ZipException: The system cannot find the file specified at java.util.zip.ZipFile.open(Native Method) at java.util.zip.ZipFile.<init>(ZipFile.java:112) at java.util.jar.JarFile.<init>(JarFile.java:117) at java.util.jar.JarFile.<init>(JarFile.java:55) Exception in thread "main"
Ank83 09. Jan 2006	Can anybody help me ! Is the problem with me or the app !?
Ank83 09. Jan 2006	aldo it give to me when i try to run it: ava.lang.Error: Do not use CM1.setLayout() use CM1.getContentPane().setLayout() instead at javax.swing.JFrame.createRootPaneException(JFrame.java:458) at javax.swing.JFrame.setLayout(JFrame.java:524) at CM1.<init>(IYOE) at CM1.main(IYOE) Exception in thread "main"
HMX0101 09. Jan 2006	install the most newly version of Java 2 Runtime :)
Ank83 09. Jan 2006	Hm... Finally !!! I start it ! Yeeeeeah ! Like first you need to extract the jar file (I used WinRar), load the CM1.class in DJ JAVA Decompiler, find the line: setLayout(null); and insted of that write: getContentPane().setLayout(null); Than save the file as CM1.java, then compile it and then you can run it ! I don't know i this is a bug, but on my machine IT WAS ! So i needed tochange all that so I can run this crackme ! P.S. When you load the crackme in the decomplier, you'll get all you need to write a keygen ! I will start writing it as soon as posible ! Now I'm going to sleep a little bit ! And tomorow I'm taking my wife to diner ! :D P.S. Nice crackme ! A little change won't hurt anyone ! :) Regards Ank83
vhly Author 11. Jan 2006	I use the JDk 1.5 compile this crackme And Use the JShrink 2.36 obfuscate this; I think that you should install tht JDK/JRE 1.5 If this can not run yet, please mail me.
m@[tador] 12. Jan 2006	It normally works on JRE 1.2 if you replace setLayout(null) to getContentPane().setLayout(null), like Ank83 said. And I couldn't find any obfuscated code. Maybe your obfuscator don't works properly? I posted my solution, written on Java (for JRE 1.2). The algo is wery easy. Serial is the Name in base64 encoding.
vhly Author 13. Jan 2006	So I say this is Very EasY. Only BASE64 Encoding
Wolle 21. May 2006	Hey all, im new to all this, but i anyway succeded to crack the serials :) So now i have made my first KeyGen, i love it! :D
dittirik 14. Feb, 20:30	Tutorial; https://www.youtube.com/watch?v=7FUNWSOGgWg

vhly's Java CrackMe #2

Download CM2.zip, 3 kb (password: crackmes.de)
Browse contents of CM2.zip

Get the right serial

make a kengen or

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Java

Published: 13. Jan, 2006
Downloads: 898

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Solutions

Solution by Kerberos, published 15. jan, 2006; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

Kerberos 13. Jan 2006	Nice crackme and nice "trick" how to hide Strings :)
vhly Author 14. Jan 2006	I had used the JShrink 2.36 to hide this CrackMe's Strings. For example: System.out.println("vhly"); it will replace the ins to System.out.println(I.I.I(1)); The Class I.I is Encoder to Get The Right String. The I/I.gif is the Encrypted Strings Data file
Junyoung 09. Feb, 06:00	Cool~ I'm newbie for Java Reversing and now I'm satisfied with it.

vhly's Java CrackMe #3

Download CM3.zip, 5 kb (password: crackmes.de)
Browse contents of CM3.zip

KeyGen this,

** Run This must in a command line **

java -jar CM3.jar

** It Can Run Two model **

Remove NAG

Remove Time Limited

Have a good luck day!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Java

Published: 22. Jan, 2006
Downloads: 687

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Solutions

Solution by Kerberos, published 25. jan, 2006; download (55 kb), password: crackmes.de or browse.

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Discussion and comments

Kerberos 22. Jan 2006	Nice CrackMe vlhy! I've working keygen, now solution :-)

vhly's Java CrackMe #4

Download CM4.zip, 6 kb (password: crackmes.de)
Browse contents of CM4.zip

This is my 4th Java CrackMe.

Please gen a License File.

give me a email,
I will check.

vhly@163.com

Thanks!

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Java

Published: 10. Oct, 2006
Downloads: 577

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by crp-, published 12. sep, 2006; download (83 kb), password: crackmes.de or browse.

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Discussion and comments

vhly Author 07. Sep 2006	This CrackMe , I define a ClassLoader to decrypt the orginal ClassFile, and must gen a lic file . It may throw some exception , it doesn't matter~
crp- 09. Sep 2006	> It may throw some exception , it doesn't matter~ well actually it does matter, as the crackme doest run, as your classloader isnt working as it should. to actually run the crackme one has to create an own loader (easy enough though).
vhly Author 10. Sep 2006	I Make this CrackMe is test the ClassLoader Method, I think it will run well. this CrackMe is not check the name and serial String's Length, if you input a null name or serial it will throw some Exception, but it will run go on, So Dont Think this, and gen a lic file is only.
modchip 11. Oct 2006	Is this another version? Why is the publish date today and the solution was published last september? :)
zairon Moderator 11. Oct 2006	modchip, crackme updated because it had a little bug.
crp- 11. Oct 2006	the solution contains a fix for the bug ;)
modchip 12. Oct 2006	Thanks for the info zairon and crp-

vic4key's KeygenMe #2

Download Keygene_#2zip.zip, 226 kb (password: crackmes.de)
Browse contents of Keygene_#2zip.zip

Level ?/10
Only: Fishing serial or Keygen. Creat a tut if u want... :-D
Gool lucky my friends! :-D

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 23. Sep, 2010
Downloads: 465

Rating

Votes: 4
Crackme is boring crap.

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Solutions

Solution by Diabolito, published 13. oct, 2010; download (32 kb), password: crackmes.de or browse.

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Discussion and comments

KKR_WE_RULE 23. Sep 2010	I cant move the crackme window. And its probably the timer that freezes the window a bit while I try to type. Will have a deeper look l8r :)
Zaphod 30. Sep 2010	I found out how to fish a serial. I made the crackme a lot smaller using ResHacker so I could see what is going on in Olly, but I don't know how to eliminate this "Always on top"-thing. Please tell me.
KKR_WE_RULE 01. Oct 2010	Genning it is boooring... A modified md5.. I figured out some modifications he made.. but then I shifted to a much more interesting target posted here ; as for the kgm here.. i didn't like it one bit. The form is huge & sits right on top of my olly. :p
Zaphod 01. Oct 2010	But still it is interesting how the author made this window which I can't get rid of! There ought to be some window style one could change to make Olly the topwindow, but I can't find it. Any ideas?
KKR_WE_RULE 01. Oct 2010	Olly->Window->Always On Top ShortCut : (Alt + F5) Thats not the prob :)
Zaphod 04. Oct 2010	HA! You're right about that, KKR! Alt+F5 - it is that simple. Thanks! But then there is no problem with this crackme :)

victordmelo's CrackMe v3c70r

Download CrackMe_V3C70R.zip, 539 kb (password: crackmes.de)
Browse contents of CrackMe_V3C70R.zip

A simple CrackMe write in C#.

Rules:

Don't Patch.
Write a KeyGen.
Don't use .net reflector.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 22. Jun, 2013
Downloads: 297

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Solutions

Solution by Cubinator, published 09. sep, 2014; download (355 kb), password: crackmes.de or browse.

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Solution by iSSoGoo, published 28. jun, 2013; download (58 kb), password: crackmes.de or browse.

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Solution by seVeb, published 28. jun, 2013; download (77 kb), password: crackmes.de or browse.

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Discussion and comments

seVeb 23. Jun 2013	possible bug? when entering nothing the app shows "empty fields" and crashes.
seVeb 23. Jun 2013	nevertheless thank you for creating this crackme/keygenme!
victordmelo Author 23. Jun 2013	This is weird. Here a i tested, and don't crash anytime. Your .NET is the 4.0 ?
seVeb 24. Jun 2013	yes but your code doesn't seem to have any odd stuff in it so i don't know why it happens, oh well :)

victordmelo's Fayzer crackme2

Download Fayzer_crackme.zip, 6 kb (password: crackmes.de)
Browse contents of Fayzer_crackme.zip

A simple crackme write in C. With a confusing algorithm but easy.

Write a keygen and don't forget the source.

Good lucky.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 13. Sep, 2013
Downloads: 262

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Solutions

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Discussion and comments

pxor 21. Sep 2013	.text:0040150E DD 1C 24 fstp qword ptr [esp] ; double .text:00401511 E8 4A 05 00 00 call _round .text:00401516 DB BD F8 FE FF FF fstp [ebp+Float_from_name] ; 80 bit float .text:0040151C C7 04 24 5A 30 40 00 mov dword ptr [esp], offset aWriteTheSerial ; "Write the serial: " .text:00401523 E8 58 06 00 00 call puts .text:00401528 8D 85 14 FF FF FF lea eax, [ebp+Serial] .text:0040152E 89 44 24 04 mov [esp+4], eax .text:00401532 C7 04 24 6D 30 40 00 mov dword ptr [esp], offset aD ; "%d" .text:00401539 E8 02 06 00 00 call scanf .text:0040153E DB 85 14 FF FF FF fild [ebp+Serial] ; 32 bit integer .text:00401544 DB AD F8 FE FF FF fld [ebp+Float_from_name] ; 80 bit float (rounded) .text:0040154A D9 C9 fxch st(1) .text:0040154C DA E9 fucompp .text:0040154E DF E0 fnstsw ax .text:00401550 9E sahf .text:00401551 75 04 jnz short badserial .text:00401553 7A 02 jp short badserial .text:00401555 EB 10 jmp short loc_401567 this crackme is bugged you are trying to compare 80 bit float number to 32 bit integer ... ofc this can work as long as the 80 bit float number is below 2147483648
Marmoto 22. Sep 2013	I agree with pxor that this crackme could be bugged the computed value to test against is always larger than 3.595e267 (at least on my machine) which is larger than any value a 32 bit int could store.
Bargest 01. Oct 2013	First of all, value .text:0040146C fld [ebp+val_E8] .text:00401472 faddp st(1), st .text:00401474 fstp [ebp+val_E8] was not initialized, so it can contain random data on start. Also, there is a hardcoded value name[2], which produces two bugs: 1) Valid key for any 2-char-length name is equal to 0; 2) If name length is 1 symbol, name[2] contains rubbish, and hash value is unpredictable. At the end of code we add length ^ 25, which gives nearly 10^11, and there is no way to get negative values during count (name bytes are zero extended to words). So there is a plenty of bugs, but one of them makes crackme crackable: just enter any name with length of 2, serial will be equal to 0.
Bargest 01. Oct 2013	Oh, sorry, I forgot to write, that [ebp + val_110] is not initialized too.

victordmelo's Hard-Crypt

Download HardCrypt.zip, 32 kb (password: crackmes.de)
Browse contents of HardCrypt.zip

A bit hard crackme!!

Don't patch.
Write a keygen and a solution!
Don't forget the Source!!

Have fun.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 04. May, 2014
Downloads: 271

Rating

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Solutions

Solution by Kirjava, published 29. may, 2014; download (91 kb), password: crackmes.de or browse.

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Discussion and comments

redoC 04. May 2014	You forgot to initialize variable dwSerialNum. But initial value seems to be static. 0x28FF94 on my PC...?
downabc 04. May 2014	and 0x20fff0 on my pc... i'm think about to use debugger in keygen to obtain the initial value of dwSerialNum.....
zairon Moderator 04. May 2014	@downabc: that's the right spirit! I like your idea and I would like to see a tutorial, it could be helpful for newbies.
basscode 05. May 2014	It's not hard at all. You are utilizing GetCursorPos in order to generate a right serial and that's it.
victordmelo Author 05. May 2014	That's fun to make a KeyGen for it. How you'll get the same mouse position ? that's only one way.
Duraven 06. May 2014	You're right victordmelo, just ignore basscode and btw. I have no idea what his problem is? This is just level 2 so why the heck would you expect it to be hard?
botanyaki 06. May 2014	this is so fantastic crackme. i cant code keygen for this. but patched and keygened original file. Anyway Thank you for your post.
Kirjava 13. May 2014	I made a dll that hooks _itoa, so I can rip the serial from memory. Is this a acceptable way to solve?
victordmelo Author 14. May 2014	yes. but there's a way more simple to do that bro.
redsees 03. Jun 2014	You can make a keygen, open it, switch to your crackme folder, open the crackme (without moving the cursor, using ALT+TAB and ur arrows), then switch back to your keygen and press any key in order to generate the key, that's it.
cr00k3dc0d3r 01. Aug 2014	Very Nice, Thank you!

victordmelo's Kaliba CrackMe

Download CrackMe.zip, 16 kb (password: crackmes.de)
Browse contents of CrackMe.zip

A very simple KeyGenme for newbies.

Rules:
Don't Patch.
Write a KeyGen and a solution.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 22. Jun, 2013
Downloads: 1163

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by iSSoGoo, published 28. jun, 2013; download (59 kb), password: crackmes.de or browse.

iSSoGoo has rated this crackme as boring.

Solution by B@zz!, published 28. jun, 2013; download (11 kb), password: crackmes.de or browse.

B@zz! has rated this crackme as quite nice.

Solution by neo85, published 28. jun, 2013; download (595 kb), password: crackmes.de or browse.

neo85 has rated this crackme as boring.

The submission of solutions is closed.

Discussion and comments

B@zz! 23. Jun 2013	Some Keys: 2w358o875 3p378 899 4b398v923 2j358b875 5n418r947 5w418d947 1z338u851 8p478n1019 2h358b875 8b478f1019 Regards, B@zz! ( Solution Incomming ;) )
BunnX 24. Jun 2013	10229301Z204586338Z245504051 14757610T295152518B354183467 16660695F333214218F399857507 15264040V305281118Z366337787 7356402Q147128358Z176554475 4234973C84699778S101640179 12545696V250914238L301097531 16519186N330384038J396461291 5168062Q103361558R124034315 May you should use the whole dword for more keys. Or you can produce 10 mathematically right keys and the rest would be random.
B@zz! 24. Jun 2013	Mh yes you are right my random function only had a range from 0 to 10 :P but atleast it doesn't matter if it has a range from 0 to 4294967295 :D but seriously who wants a long key if he is able to have a small . In my Keygen you are also able to change the range because i wrote a 0815-Random function haha
iSSoGoo 24. Jun 2013	@B@zz!: The idiom "0815" only exists in the German language ;) It means something like 'cheap' or 'poor' ;)
bubakzlesa 28. Sep 2013	Nice on for beginners. (x) + (any char) + (20x+318) + (any char) + (24x+827)
kurill2006 08. Oct 2013	; free variables: (declare-const dword1 Int) (declare-const char1 Int) (declare-const dword3 Int) (declare-const char2 Int) (declare-const dword2 Int) ; end free variables. (declare-const v5 Int) (assert (= (+ 88 (- (* 2 (+ (* dword1 10) 125)) 20)) dword3)) (assert (= (+ (+ 3 (* 2 (+ 253 (* 2 dword1)))) (+ 88 (- (* 2 (+ (* dword1 10) 125)) 20))) dword2)) (assert (and (> dword3 0) (> dword1 0) (> dword2 0))) (check-sat) (get-model) (exit)
zilber 01. Jun 2014	Tryed to describe as equations system: int i1,i2,i3 // In order of return from scanf() // all scanf line is in format: "%d%c%d%c%d" where // i1'char'i2'char'i3'char i1 = random int i2 = 2 * (10 * i1 + 125) - 20 + 88 i3 = i2 + 2 * (2 * i1 + 253) + 1 + 2 ) Then simplifyed it to a: i2=20i1+318 i3=24i1+827 The result is same as bubakzlesa said. Thanks a lot for a great fun!
lonestar 31. Jul 2014	Solved it :) Thx for the CrackMe, here are a few Keys: Key: 23925e478818x575027 Key: 24101o482338m579251 Key: 24104q482398g579323 Key: 24107b482458j579395 Key: 24111l482538d579491
leptepkt 02. Sep 2014	so much spoiler
Exorcist1 05. Feb 2015	97039-1941098-2329763
Exorcist1 05. Feb 2015	If anyone is interested in writing a keygen using Python - feel free to contact me)
sevsnine 27. Jan, 13:40	if __name__ == '__main__': one = random.randint(1000,9999) two = 20 * one + 318 three = 4 * one + two + 509 print (str(one) + '-' + str(two) + '-' + str(three))

victordmelo's Papagaio CrackMe

Download Papagaio_CrackMe.zip, 358 kb (password: crackmes.de)
Browse contents of Papagaio_CrackMe.zip

Papagaio CrackMe is a bit hard CrackMe. You have to write a keyGen and a tutorial about your solution

-No Patch allowed
-No self-keygen allowed

It can seem hard, but it's not! Good Luck pilgrim.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 25. Aug, 2016
Downloads: 31

Rating

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Solutions

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Discussion and comments

redoC 05. Sep, 13:29	redoC DcçA2ç5fç70çD5çFcçD2ç90ç61çC4ç8cç9eç16ç2fç3eçCaç92çF8ç38çC6çEbçB8ç5dçDcç70ç69ç5eç93çDdçEcç63ç0dç Why using serial characters out of ASCI range?
redoC 05. Sep, 13:44	... noble-minded mission ;)
victordmelo Author 06. Sep, 00:35	In my language 'ç' is very used

Victoria's DongleCrackMe

Download DongleCrackMe.zip, 289 kb (password: crackmes.de)
Browse contents of DongleCrackMe.zip

The aim of this crackme is an analysis of the works of some hardware key. The key is simulated through a process named DongleBlackBox, which is run along the protected program. The program (JPEGConv) will have been cracked when it's fully operational and you don't need the key process to make it
work. Physically it's equivalent to elimination of the need for the dongle.
Please read the README.txt file first for more info.

Difficulty: 7 - Very hard
Platform: Windows
Language: Unspecified/other

Published: 15. Aug, 2005
Downloads: 878

Rating

Votes: 9
Crackme is quite nice.

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Solutions

Solution by josh, published 28. jun, 2013; download (828 kb), password: crackmes.de or browse.

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Discussion and comments

Victoria Author 06. Sep 2005	Well, still not a slightest trace of a solution. Guess it's harder than the 7, that was given to the crackme by Zero :)
Shism 06. Sep 2005	So you have to enable Show w. channel correct?
Victoria Author 09. Sep 2005	No, you have to eliminate the need for the key process. The program requires a process called DongleBlackBox to run all the time, otherwise it stops working. Your task is to remove the dongle in such a way that the program would still work normally. This is a simulation of the following situation: you have a hardware dongle protected (eg. CAD) program you want to crack. You unplug the dongle, but because of that the program obviously refuses to work. So you patch the code and remove all the security related stuff and the program works like a charm without the dongle. In this situation the dongle is simulated as the DongleBlackBox process. To make it work like in the real life you aren't allowed to look into this process or its code in the DongleBlackBox file, just as you wouldn't look into the code of a real dongle - it's a black box. On the other hand, you may do every other thing possible - a lot of crackmes here have a rule of no patching. In this crackme it's not only allowed in case of JPEGConv.exe and sm.dll, but I invite you to do so! I do believe it's harder than your average crackme (it's harder than 7, compared to other crackmes with this difficulty level), but I invite all of you to try it, even the newbies. Even if you can't crack it I'd be interested in HOW you tried to do it and why it didn't work. Sometimes a description of an analysis is much more interesting than the solution itself. Good luck :)
Shism 10. Sep 2005	So we can't patch sm.dll?
Shism 10. Sep 2005	Very interesting O O.... How the program runs as soon as you open it in a debugger.Without even executing it...Wonder how that trick works
Shism 10. Sep 2005	Also very interesting that the dongle runs without executing any code in the exe..... Wow that's pretty good work.
Victoria Author 11. Sep 2005	To make it clear: 1. you MAY patch sm.dll 2. you MAY patch JPEGConv.exe 3. you may NOT do anything with DongleBlackBox process or file (not even look into it, as it would spoil the fun)
deroko 04. Oct 2005	huh, I'll try again tomorow to see what can I do... so far I've reversed struct that is sent to dongle, also tried to set hook after WriteFile/ReadFile so I can see what reg combination is sent/received from dongle, then used code to inject into last section of sm.dll and hooked sm.RaiseException so it will point to my new proc, but it crashes at dongle_request 4b (I didn't find what that thing is yet..., maybe tomorow) =)
bilbo 04. Oct 2005	It seems that this thread was moved here: http://www.woodmann.com/forum/showthread.php?p=47644 Aha, and thanks, Victoria, for having inspired me an article at http://www.osix.net/modules/article/?id=728
stingduk 05. Oct 2005	well i was browsing through the rce board (woodmans) and i saw the thread pointing in here and the comment by shism in there [quote] Very interesting O O.... How the program runs as soon as you open it in a debugger.Without even executing it...Wonder how that trick works Shism 11. Sep, 00:48 Also very interesting that the dongle runs without executing any code in the exe..... Wow that's pretty good work. [/quote] got me interested you can use my plugin ntglobalflag that breaks on dll init routines as well as tls callbacks to look at how it is operating also you can break on entry point of sm.dll ill posting a snippet of it when it is creating the dongleblackbox here [quote] 100011F2 PUSH sm.10005110 ; \|ModuleFileName = "DongleBlackBox" 100011F7 CALL NEAR DWORD PTR DS:[<&KERNEL32.Cr>; \CreateProcessA \|ModuleFileName = "DongleBlackBox" \|CommandLine = NULL \|pProcessSecurity = NULL \|pThreadSecurity = NULL \|InheritHandles = TRUE \|CreationFlags = 0 \|pEnvironment = NULL \|CurrentDir = NULL \|pStartupInfo = 0012F860 \pProcessInfo = 0012F850 [/quote] you can get it from biw http://www.reversing.be/article.php?story=20050603193932184 hey elfz pretty excellent job of transforming this site :) i am logging in after quite a long time may be years together :) fantastic job comments and stuff search browse contents hats off to you :)
Victoria Author 05. Oct 2005	Thanks Bilbo for the tip about the discussion, haven't known about it. I've posted some info there, although not much, as not to spoil the fun.
badmojo2 14. May 2013	Very old crackme but definitely worth your time... Different from most others and a good amount of challenge. Will post solution if anyone still cares.
redoC 14. May 2013	Yes, pls post solution.
redoC 15. May 2013	wont run on Win7
badmojo2 15. May 2013	If you have problems running it on newer OSes try starting a command line process (cmd.exe) and running it from there. It worked for me on Win7 x64. Believe it has to do with input/output handles but didnt look further into it.
redoC 15. May 2013	It's better, but now it displays: Could not create dongle process
badmojo2 15. May 2013	Strange, did you extract the whole archive into the same directory? DongleBlackBox must be in the current folder for JPEGConv.exe to run...
zairon Moderator 15. May 2013	Trace back and see why it shows this advice
redoC 15. May 2013	When I change PEheader.subsystem from Windows GUI to Console it starts working.
redoC 17. May 2013	badmojo2 what's your solution? You identify dongle code without debugging it?
badmojo2 17. May 2013	Yeah, the only rule is that you must absolutely not "look inside" the DongleBlackBox process as that would pretty much spoil the challenge. I used a mostly automatic approach to identify the dongle code (you are not forbidden from creating your own program that interacts with the dongle). :)
redoC 18. May 2013	So post solution, do not leave it to yourself.
badmojo2 18. May 2013	There is too much manual work needed even after a semi-automated solution. I don't mean to be an asshole about it but its been 7-8 years this crackme was released, and interest is too reduced to justify me spending hours and hours writing it up step by step. If you do seriously attempt it and get stuck on a specific part please send me a private message.
josh 27. Jun 2013	Interesting Dongle. Agree with badmojo that its the worth while investigating it. And, that it needs a lot of manual work, which is of course attractive from the protection point of view.
andrewl.us Moderator 28. Jun 2013	congrats to josh on a great solution here!

vik3790's Keygenme

Download Arrow.zip, 21 kb (password: crackmes.de)
Browse contents of Arrow.zip

Beautiful keygenme written in ASM,
Steps:
1.- Find a way to make it start.
2.- Write a keygenme (a serial for a name will not be enough)
4.- Have fun!!!!!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 25. Jan, 2016
Downloads: 365

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by binaryquark, published 29. feb, 2016; download (174 kb), password: crackmes.de or browse.

binaryquark has rated this crackme as awesome.

Solution by aldeid, published 09. feb, 2016; download (309 kb), password: crackmes.de or browse.

aldeid has rated this crackme as quite nice.

Solution by ragdog, published 09. feb, 2016; download (698 b), password: crackmes.de or browse.

ragdog has not rated this crackme yet.

Solution by acruel, published 09. feb, 2016; download (2 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

ragdog 02. Feb, 19:06	Thank you is solved i hope my small tutorial is enough ;-) Greets,
aldeid 04. Feb, 20:08	Solution posted :)
korsader 05. Feb, 11:55	Nice keygenme, thanks :)
crackme101 06. Feb, 17:14	A very nice crackme dude. I started working on it last night. Let me say this.... you are a clever dude man. I'm still discovering your tricks.
crackme101 12. Feb, 14:40	Finally busted the crackme last night.
binaryquark 23. Feb, 18:16	This was a great crackme! Currently finishing the solution.
beaver 20. Sep, 12:44	Good job, need more

vik3790's Little fish.

Download Fish.zip, 22 kb (password: crackmes.de)
Browse contents of Fish.zip

Well people, this is my first crackme, the algorithm to get the password is very easy, but you need to find a way to open the window that allows you to
enter your user name and password.
I hope you enjoy it and find it interesting.
Don´t forget to write a keygen and a tutorial.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 23. Sep, 2015
Downloads: 618

Rating

Votes: 7
Crackme is quite nice.

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Solutions

Solution by Rouse_, published 19. jan, 2016; download (1 kb), password: crackmes.de or browse.

Rouse_ has rated this crackme as nothing special.

Solution by aldeid, published 10. dec, 2015; download (257 kb), password: crackmes.de or browse.

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Solution by acruel, published 25. sep, 2015; download (2 kb), password: crackmes.de or browse.

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Send a message to Vinh Son »

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Discussion and comments

Romop5 23. Sep 2015	Solved, really simple, the toughest part is to make the window to show, otherwise the user-to-pass generation algorythm is really easy :)
arlkers 05. Oct 2015	There is a bug, the registered name does not detect the length, must be greater than 3 characters.
acruel 06. Oct 2015	You can assume that the name buffer is zero-initialized because it is in the bss segment.
OnlyPrinzP 17. Oct 2015	Thanks vik3790, fairly simple just jump on startup directly to the login screen. Path badboy out thats it.
Herz3h 18. Oct 2015	Nice crackme, relatively easy, but good as a practice
odd100 26. Oct 2015	Can I change the file in order to get to the login dialog?
odd100 27. Oct 2015	Nvm, solved, very nice
Rouse_ 11. Dec 2015	too easy for friday, but nice :)
crackme101 03. Feb, 05:19	This has been pretty challenging for a rank beginner. Very nice crackme. Still working on analyzing the key algorithm. Racked my brains hard and then read a solution to make the hidden popup appear. However I will avoid reading any solutions for the keygen until I'm done.
oXYgen 03. Feb, 16:32	Easy but fun. Thanks bro !
crackme101 05. Feb, 05:42	finalized solved it. Thanks.
beaver 23. Sep, 18:48	Nice crackme, dude.
hamid7 30. Sep, 19:27	hello really i need to learn designing software and testing to become good in application cracking?
vhelium 16. Oct, 04:01	Very enjoyable crackme for beginners, thanks!

Vinh Son's CrackmeVS4

Download crackmevs4.zip, 6 kb (password: crackmes.de)
Browse contents of crackmevs4.zip

I think it hard for Newb's

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Oct, 2002
Downloads: 882

Rating

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Solutions

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Discussion and comments

ViperG's ViperG's (First) Crackme 1

Download Crackme.zip, 26 kb (password: crackmes.de)
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This is my first crack me program. I rated it as 4 because I'm pretty sure it is still difficult to hack without it being packed. But any pro should be able to get through this.

I'm using a special technique to make it hard to crack. It may not be new, but I wanted to give myself a try to see if I can make a program hard to crack.

Any solution will do for me just fine. But if you can find the password as well, then good for you.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 19. Aug, 2005
Downloads: 689

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by ingsoc, published 19. aug, 2005; download (3 kb), password: crackmes.de or browse.

ingsoc has rated this crackme as nothing special.

Send a message to virtualspace »

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Discussion and comments

ViperG Author 09. Aug 2005	Actually, 2 is a better rating for my first crack me.
ingsoc 10. Aug 2005	ViperG, this crackme has been compiled in DEBUG mode in Visual Studio. Are you sure this is what you wanted?
ViperG Author 19. Aug 2005	Uploaded new version. Includes readme.txt for rules (no rules) Fixed minor bug (still crackable in previous release) And nice solution by inqsoc, whom destroyed my crackme and even shows some source code.

virtualspace's anti-bypass_crackme

Download crackme_2.zip, 5 kb (password: crackmes.de)
Browse contents of crackme_2.zip

it is hard to crack

Difficulty: 7 - Very hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Sep, 2003
Downloads: 1102

Rating

Votes: 3
Crackme is boring.

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Solutions

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Discussion and comments

pants
19. Feb 2006

There are a number of 'unsolved' crackmes on this site that are either broken or mathematically unsolvable. There are others, like this, that are interesting, solvable, but difficult to find.

The current voting system doesn't appear to help weed out these bad crackmes, so it seems the best way is through personal recommendations.

As such: Interesting cm - but more like a '3' than a '7'.

Many thanks to asept!c for mailing me the link.

pants
21. Jun 2006

Just came across this...

'Enhancing Software Protection With Poly-Metamorphic Code' [h**p://www.nswscl.org.au/journal/56/YipZhao.html]

It would appear this crackme was used as a 'proof-of-concept' in someones MSc dissertation...

The system as-presented is (of course) pure snake-oil - reading the paper made my eyes bleed.

Just ignore the nonsense in the paper - the solution is very simple but still worth a look...

virtualspace's crackme

Download crackme.zip, 5 kb (password: crackmes.de)
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it is my first crackme

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 13. Aug, 2003
Downloads: 1474

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by BadSector, published 15. feb, 2004; download (10 kb), password: crackmes.de or browse.

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Vohligh Author 04. May 2005	Im afriad the solution is not 100% correct...try Name: Vohligh Indrago Company: Macromedia generate a serial using Knight's keygen....and pop those values into the crackme. It doesn't seem to work on myside... Vohligh
Knight 05. May 2005	Yes seems u right. I think its due to spaces in your name. Soon be fixed. Thanx for pointing my mistake. Regards Knight

Voik's Voik - KeygenMe 1

Download Voik.zip, 2 kb (password: crackmes.de)
Browse contents of Voik.zip

I don't know how difficult it is, but i believe it's not easy.
This is my first KeygenMe.

Your task: Keygen it!

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 10. Sep, 2010
Downloads: 430

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by morecode, published 28. apr, 2013; download (310 kb), password: crackmes.de or browse.

morecode has not rated this crackme yet.

Solution by vptrlx, published 22. sep, 2010; download (27 kb), password: crackmes.de or browse.

vptrlx has rated this crackme as quite nice.

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Discussion and comments

redoC 10. Sep 2010	Voik, do you have functional keygen?
Voik Author 11. Sep 2010	yes redoc, I have a functional keygen for it. :)
vptrlx 11. Sep 2010	vptrlx F2D78F14B71205085B95F564CF9A22C7BB369DD4C9629E328F4FAFD7FBBDDE65C63161CD0D4384280442219AB0EAB6A0 tutorial soon :) >I don't know how difficult it is, but i believe it's not easy. I also :-P
vptrlx 11. Sep 2010	ok, solution submitted
Voik Author 11. Sep 2010	very nice vptrlx! =)
Xspider 12. Sep 2010	looks interesting!
vptrlx 13. Sep 2010	**the short edition to the solution i've submitted: in case 0x3F+1==0x40 (i believe it's true :)) i really looked for a hamiltonian path, not "only for the 0x40-path". Maybe this graph has a hamiltonian cycle and in that case a fast keygen can be written after precalculation.
hewmon 13. Sep 2010	hewmon 5032530884812c53d510a0116cc19734759c898a5a421ae57ce763668e7391ebf5feef779acef182ac3ad3eb67dbccb8 tut & improved keygen are coming soon. current keygen is very slow on certain usernames...
Voik Author 15. Sep 2010	two found the serial. :D
Voik Author 17. Sep 2010	no keygen? no solution? ;/
Trojann 17. Sep 2010	i am new, in cracking area, im so , so newbie.. hehe i cant find the serial :(
vptrlx 17. Sep 2010	Voik, i submitted solution at about "11. Sep, xx:09", lol. It is still under reviewing.
bnw33 19. Sep 2010	bnw33 440284566dfdcf9abbd7fbb4faf976f32e29eb086bc606900520c9622a192024e478f14b72d9d61cd5c631bb1d8d439f
Voik Author 20. Sep 2010	nice, nice. :) How much time you spent to find the serial?
bnw33 21. Sep 2010	I spent 2 nights reversing the program and 2 nights building a keygen. I thought that it would be very difficult to find a key, but a 3 minute brute force led to over 500 keys.
Voik Author 21. Sep 2010	Very nice! I based this algorithm, in this chess problem: http://en.wikipedia.org/wiki/Knight%27s_tour And it haves a non-bruteforcable solution. :)
vptrlx 21. Sep 2010	If it is so, then ok :) But a more deteiled look is needed to find this out

Voik's Voik Math#1

Download Math1.1.zip, 2 kb (password: crackmes.de)
Browse contents of Math1.1.zip

A diferent crackme, that requires some basic math habilities...
Ultra clean code, some cool tricks and a cool algorithm. (:

Rules:
1 - Find the 24 valid serials;
2 - All the serials must work outside of debugger;
3 - No BruteForce;
4 - No Patching;

Enjoy it!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 30. Jan, 2011
Downloads: 292

Rating

Waiting for at least 3 votes
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Solutions

Solution by kstangl, published 11. feb, 2011; download (4 kb), password: crackmes.de or browse.

kstangl has rated this crackme as nothing special.

Send a message to Volty »

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Discussion and comments

idid231 25. Jan 2011	Hello. I only see 9 character to be compare, maybe i wrong because i don't understand last loop, is it only check 6 char? and the loop previous it, i don't know how to Repne work, search on google but still don't understand, stupid! I like this crackme and will try again, thank you Voik!
Voik Author 25. Jan 2011	the REPNE repeat a string comand ECX times. Example: mov ecx, 8 repne movsb this code, will repeat MOVSB 8 times. (:
Xspider 30. Jan 2011	i've found one but it doesn't work outside dbg x)
KKR_WE_RULE 31. Jan 2011	When user says outside debugger, there are some anti-debug in there. SeekNDestroy those 1st :)
Xspider 31. Jan 2011	i know about that ;)
DarkSpreader 01. Feb 2011	I've found one that works outside a debugger. 23 to go. ;d
Voik Author 03. Feb 2011	if you found one, probably you will find the others 23.
DarkSpreader 05. Feb 2011	So far I've found 21.

Volty's Volty's Delphi Crackme #1

Download Crack_Auth.zip, 636 kb (password: crackmes.de)
Browse contents of Crack_Auth.zip

A slightly challenging, native coded, crack me that has some simple defense.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 29. Apr, 2015
Downloads: 572

Rating

Votes: 3
Crackme is boring.

Rate this crackme:

Solutions

Solution by vigilanz, published 17. may, 2015; download (2 kb), password: crackmes.de or browse.

vigilanz has rated this crackme as boring.

Solution by syspher, published 17. may, 2015; download (1 kb), password: crackmes.de or browse.

syspher has rated this crackme as boring crap.

Send a message to Voodoo »

View profile of Voodoo »

Discussion and comments

downabc 30. Apr 2015	i donot think this should be set as a level 2 difficulty....
halsten 30. Apr 2015	I agree, aside from the over bloating binary and unnecessary extra code.
zairon Moderator 05. May 2015	It's two because of the extra code, but -imho- there's not big differences between 1, 2 or 3...
ImMaarx 11. May 2015	anyone can help me? My skype username is "Marcellyto"
LiaMircea 01. Jun 2015	Olly v2 --> Crack_Auth --> Click DR --> Search for --> All ref string --> 2 click ML120BOPQ0 --> down BP 00537388 Enter Product Code = Mircea --> Authenticate --> Address Hex dump Command Comments 00537388 \| 8B45 FC MOV EAX,DWORD PTR SS:[EBP-4] UNICODE "Mircea" 0053738B \| 8B15 38E75400 MOV EDX,DWORD PTR DS:[54E738] UNICODE "ML120BOPQ0LOOG19MZF0" 00537391 \| E8 CA06EDFF CALL 00407A60 [Crack_Auth.00407A60 00537396 \| 75 23 JNZ SHORT 005373BB
Kriol 10. Jun 2015	the program can't check if the serial is correct ? I click the authenticate button but the program not do anything...is it a bug ?
oXYgen 14. Jun 2015	@Kriol Not a bug ;)
nImaarek 15. Jun 2015	ML120BOPQ0LOOG19MZF0
givses 24. Sep 2015	Level 0/10 00537391 \|. E8 CA06EDFF CALL <Crack_Au._Unit2.@UStrEqual> 00537396 \|. 75 23 JNZ SHORT Crack_Au.005373BB Serial: ML120BOPQ0LOOG19MZF0

Voodoo's CrackMe#3

Download crackme3.zip, 158 kb (password: crackmes.de)
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Its a Name/Serial Delphi crackme

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Borland Delphi

Published: 06. Oct, 2002
Downloads: 1571

Rating

Waiting for at least 3 votes
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Solutions

Solution by _pusher_, published 07. oct, 2002; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

vptrlx's Magic mirror

Download Magic_Mirror[vptrlx].zip, 244 kb (password: crackmes.de)
Browse contents of Magic_Mirror[vptrlx].zip

I don't know how difficult it is, but i believe it's not obvious and a little bit tricky one.
The best solution must be the name/key pair.
And, this one wants a lot of your resources, so you better don't try to solve it while running something else :)
/*I guess, that with everything closed it must be ok everywhere - it worked correct even on the old 633Mhz Celeron*/

So, as it is said, close all other programs and crack it! ;)
Good luck!

Cheers,
vptrlx.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 16. Jul, 2010
Downloads: 306

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

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Send a message to w02057 »

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Discussion and comments

vptrlx Author 02. Aug 2010	Well, colleagues :) I know it's not very easy, but does anyone try something? It keeps being unsolved for a long time -- why?
r-Evolution 05. Sep 2010	The one with the animation makes things more complicated!!!!
vptrlx Author 07. Sep 2010	r-Evolution, did you intend to see a usual messagebox? :) Tried to make it look pretty :)
vptrlx Author 07. Sep 2010	/the ui part was written about 4 years ago, this is the oldest part of the code/
r-Evolution 09. Sep 2010	I don't disagree it's really beautiful but it makes things complicated.if it had a messagebox called with a function to MessageBoxA it would be easy to be found the routine to the algorithm of comparison between name+serial and name+real serial.I checked the code.it gave me a headache :P
r-Evolution 09. Sep 2010	Btw I tried call stack backtracing too many calls with the animation.I am thinking to try something tomorow.but if I solve it first you will give me the source :) deal???
freesoul 09. Sep 2010	r-Evolution... if you had hard to find the check routine, then the check routine itself will rape your brain xD
vptrlx Author 10. Sep 2010	Actually, the wrong-serial-animation-routine can be easily found (btw the right-serial-animation-routine also isn't hard to see). But the way it's called.... :)
freesoul 12. Sep 2010	Well I really don't know how the crackme worked for you vptrlx: I modified the crackme to see the output of the modified DWORDS on the algorithm (via messagebox) and in runtime w/o bps I get different outputs. So I think this is not reversible. My pc has 3 GHz 3 GB ram, running only your app :S
vptrlx Author 13. Sep 2010	it is reversible, but if you include messagebox (or any other operation taking more than 25ms :-P) you will get "a very random everything" :) Algo has to be analyzed in another way. After you know the "inside" of the algo you'll see that it works as i expect in the absolute majority of cases. And for the left minority i recommend closing all other applications.
freesoul 13. Sep 2010	No, the messagebox is just after the algo, and I get different outputs... ^^ Okey.. I'll suposse how it have to work and try to keygen for majority of cases ! :P
vptrlx Author 14. Sep 2010	it's hard to determine the "just end of the algo", because the value you are talking about keeps being updated for a noticable time after the work with it is finished; it may have any random value after i give up watching it.
vptrlx Author 24. Dec 2010	hey, freesoul! hey, anybody?! :)
draww 24. Dec 2010	hey vptrlx.. i just saw this one. at first everything is clear. how the name & serial are used (conversions, operations) 00453A18 /. 55 PUSH EBP ; kubok (success) 00453BFC 55 PUSH EBP ; jazyk (failure) 00454CA4 $ 55 PUSH EBP ; check function an then two threads running in THREAD_PRIORITY_HIGHEST that's why it needs so much resources (400 cycles?) it's Slovak right? kubok = cup, jazyk = tongue :P etc. etc. maybe i talked too much :O
vptrlx Author 24. Dec 2010	hi draww! it's russian :) These function names in russian and the whole interface part code look so ugly now (as common for 5-year-old code), but it works and i preferred just not to touch it, even didn't try to hide this cup and tongue routines :P And THREAD_PRIORITY_HIGHEST is just a small attempt to get so max time as possible, which is needed.
draww 25. Dec 2010	yep russian, after i wrote the message, that was my second guess :) you'r right, the code is still good..

w02057's CrackMe#1 by w02057

Download CrackMe#1_by_w02057.zip, 373 kb (password: crackmes.de)
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This is my first Crackme, so dont expect a real challange, but writing up the algorithm might prove to be a headache! :)

It is written in vb with the .NET framework, and the rules are as follows;

###--Rules--###

1) No bruteforcing
2) No patching
3) Write a keygen and/or a tutorial if you crack it.
4) If you want to, write up how the algorithm works and submit it with your solution.

Any comment's welcome, good luck and enjoy!! :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 24. May, 2008
Downloads: 527

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Solutions

Solution by obnoxious, published 01. jun, 2008; download (88 kb), password: crackmes.de or browse.

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Solution by Kalippan, published 01. jun, 2008; download (20 kb), password: crackmes.de or browse.

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Discussion and comments

neo_40 24. May 2008	Good one!!!!! Please teach me someone how to make one of my own I can only crack those but can't make and submit one after all I am a teen
w02057 Author 25. May 2008	There's also some great microsoft guides for VB and C, written for complete beginners, its what I used to learn it, as well as just messing and experimenting with the language. Heres the addy: http://msdn.microsoft.com/en-us/beginner/default.aspx
Xspider 25. May 2008	@ neo_40 why don't you learn MASM or delphi too they are g0od ;)
w02057 Author 27. May 2008	Yea sure, there isnt just one language out there, the more you have a go with the better.
Kalippan 29. May 2008	Since no one wrote a tut... I'l write one... After a long interval...
obnoxious 29. May 2008	hey hey i am gonna upload a tut 2day...........;)
Kalippan 29. May 2008	Good work... Any way i'l also upload...
w02057 Author 01. Jun 2008	Thanks obnoxious and Kalippan for the great work on your solutions, now have a go at some of my others :)

w02057's CrackMe#2 by w02057

Download CrackMe#2_by_w02057.zip, 154 kb (password: crackmes.de)
Browse contents of CrackMe#2_by_w02057.zip

<<--##Task##-->>

Your task for this CrackMe is to recover the number's for all of the serial keys, the relationship between the number's & keys, and only when you have all 8 you have finished.

The number is different for each serial, but they have similarities ;|

TIP: Bruteforcing will probably work best.

<<--##Rules##-->>

1) Patching is allowed, even though it won't help you much ;)
2) Find out the number's for all Serial's.
3) Bruteforcing is also allowed.
4) If you get all the numbers's, write a tutorial on how you did it, also include any programs that you coded in the process of cracking it etc.

Any comment's welcome, so good luck and enjoy! :)

Greetz to all fellow reverse engineer's, and n00b's lol $)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 24. May, 2008
Downloads: 511

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by costy, published 26. jul, 2008; download (336 kb), password: crackmes.de or browse.

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Discussion and comments

w02057 Author 31. May 2008	Hi all Ive had a recent question from obnoxious asking if this crackme is even possible! I know that it is DEFINATELY possible because i have managed to recover the numbers through bruteforcing, using only the information you would have. So if you are having doubts or couldnt do it, then have a go :) Thanks, w02057
costy 04. Jul 2008	i tried to bruteforce all number from 10000000 to 99999999 in order to find a macth with E9A1-CFE4-A2D6-D19B-E1E2. I took like 4 hours and i didn't find anything. :-(
costy 24. Jul 2008	There I simply made an error in my bruteforcer. I rewrited it and i founded the valid numbers. ;) Excuse me guys.
obnoxious 25. Jul 2008	so we finally we r gonna see a solution fro this1 ;)
costy 26. Jul 2008	Thanks TiGa. Thank you for publishing the solution. Sorry about my English. @w02057 Nice crackme. My first brute in VB NET ;-)
w02057 Author 23. Nov 2008	Hi Costy great solution. You could solve the problem with the form locking up by creating a different thread for the bruteforcing work.
Flid 17. Feb 2010	The ruteforcer is not very well. It's possible to write a bruteforcer much faster even without using multithread. But anyway, good work :)

w02057's CrackMe#3 by w02057

Download CrackMe#3_by_w02057.zip, 230 kb (password: crackmes.de)
Browse contents of CrackMe#3_by_w02057.zip

<<--Task-->>

To complete this crackme, you must find out how the algorithm works, then write a keygen :)

This is a more interesting type of crackme compared to my others, as I have based it on cryptographic puzzles to make it more interesting for you guys!

<<--Rules-->>

1) No patching
2) No bruteforcing
3) Write a keygen and submit it with a tutorial
4) Possibly write up how the algorithm works!

Good luck and enjoy

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 27. May, 2008
Downloads: 517

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by born2c0de, published 03. jun, 2008; download (39 kb), password: crackmes.de or browse.

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Solution by bikers80, published 03. jun, 2008; download (35 kb), password: crackmes.de or browse.

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Discussion and comments

obnoxious 02. Jun 2008	eh! tell me how many "numbers" are there in the md5 of ur productId.
born2c0de 02. Jun 2008	Awesome. Solved it. Keygen written. Writing tutorial and sending in a few minutes. Great work w02057!! Kudos to you. @w02057: You really didn't need to give out the Concat(md5(prodid,username)) info. It was clear from the listing.
born2c0de 02. Jun 2008	Solution submitted. I took more time because I have written a very-high detailed tutorial. The Keygen also generates Multiple serial numbers. Waiting for moderator approval. Thanks w02057. Nice work.
w02057 Author 02. Jun 2008	Great work born2c0de, I look forward to seeing it! Yea, the algorithm is a bit buggy, as there are multiple combinations of serial number for the same name, and that honestly wasn't the intention :-) Ive got a great idea for CrackMe#5, so stay tuned....
obnoxious 03. Jun 2008	nope man! thats the problem. the id generated has 22 numbers :( . the only time i got a 12 number id was when i put "," as my name lol. looking forward to the keygen but it sdnot work on my system unless i put my name as "," lol........................
w02057 Author 03. Jun 2008	Thanks to born2c0de and bikers80 for your great tutorials and keygens, I found them great to read! Stay tuned for my next crackme...
PrincessJade 03. Jun 2008	Dim random = Label1 random.Text = "2681194357" this is found where? it's what has held me up
PrincessJade 03. Jun 2008	oops right in front of my unobservant face lol
w02057 Author 04. Jun 2008	Yea sorry obnoxious, I didn't handle that part of the getid() function very well!

w02057's CrackMe#4 by w02057

Download CrackMe#4_by_w02057.zip, 39 kb (password: crackmes.de)
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This crackme is built using some of the ideas from CrackMe#3, but it is much more fun!

The main algorithm is based on a well known puzzle, but just messed around a bit so not to make it too obvious.

<<--Rules-->>
1) No patching
2) Find the 2nd key to make a matched pair.
3) Write a solution when you are done, a keygen isnt required, just a tutorial.

Have fun and enjoy!

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 05. Jun, 2008
Downloads: 1958

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Solutions

Solution by obnoxious, published 23. jun, 2008; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

obnoxious 22. Jun 2008	For those who were waiting for a solution who bit their nails up trying to write a bruteforcer hoping to solve it i have uploaded a solution so that you could read it n think was it really that easy........... :-)
MACH4 23. Jun 2008	@obnoxious nice work! Just couldn't get into that one myself! Not knowing the puzzle didn't help...
obnoxious 23. Jun 2008	thanks for appreciating. At times i am too smart and at times you can see me writing dumb comments all over crackmes.de ;)
w02057 Author 09. Jul 2008	Thanks obnoxious for your great tut, well written and a good read! Im looking into obfustication methods for my next crackme, and trying to stop .NET reflectors from reading my code!!! cheerz, w02057
simonzack Moderator 10. Jul 2008	good luck on next crackme :) maybe i'll try make a working control flow deobfuscator

w02057's CrackMe#5 by w02057

Download CrackMe#5.zip, 153 kb (password: crackmes.de)
Browse contents of CrackMe#5.zip

<<--Rules-->>
1) No patching.
2) No bruteforcing.
3) Find the key and serial codes.
4) Write a solution.

Have fun and enjoy!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 01. Jan, 2009
Downloads: 1664

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by T.0.R.N.A.D.0., published 21. mar, 2009; download (204 kb), password: crackmes.de or browse.

T.0.R.N.A.D.0. has rated this crackme as nothing special.

Solution by indomit, published 16. mar, 2009; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

obnoxious 02. Dec 2008	hey man long time no see. hows ya!
w02057 Author 02. Dec 2008	yea not bad thanks obnoxious, sorry I havent posted any crackmes for ages, been busy lol
w02057 Author 11. Dec 2008	UPDATE: New Bug-Free version has been uploaded. Thanks to all that identified the faults, and I am sorry for any time you may have wasted.
Wasted_Bytes 19. Jan 2009	Submit solutions..please(^^)
w02057 Author 22. Jan 2009	NO BRUTEFORCING!!!
simonzack Moderator 22. Jan 2009	@been busy lol school? :p
T.0.R.N.A.D.0. 16. Mar 2009	SOLVED IT !!! Writing a tut
T.0.R.N.A.D.0. 16. Mar 2009	Tut complete. Posted solution.
T.0.R.N.A.D.0. 16. Mar 2009	@ w02057 BTW, your instructions say find 'THE' key. But, I think there are 7 possible keys. And, one serial per key.
indomit 18. Mar 2009	T.0.R.N.A.D.0., there are 8 possible keys. And your FindKey.exe found all 8 :)
indomit 18. Mar 2009	And I think, you're using bruteforcing :)
T.0.R.N.A.D.0. 19. Mar 2009	Yes, but I bruted the key. But that was just to save some time. I had recognized that the author has unfolded a magic square into rows columns and diags. I had no time (& mood) to use pen 'n' paper. So, I bruted the key. But I don't think it's wrong to do that. Is it ??? And sorry about the '7' thing. It's 8. Thanx :))
T.0.R.N.A.D.0. 19. Mar 2009	Re-submitted after changing '7' to '8'. lol :)
indomit 19. Mar 2009	<<--Rules-->> 2) No bruteforcing. ;)
rickster090 26. Mar 2009	Man... i think i need to find something a bit easyer ( im a total Newb)

w02057's Newbie-Level1

Download Newbie-Level1_by_w02057.zip, 407 kb (password: crackmes.de)
Browse contents of Newbie-Level1_by_w02057.zip

<<--Overview-->>

After the overwhelming popularity of my "Ultimate Kit for Newbies", ive decided I will start a series of fun crackme's aimed at beginners, that will get increasingly harder as the series develops.

I will release the source code as soon as a solution has been submitted, to help others understand what was really going on!

The aim of this series will be to help all you n00b's out there get up to speed and learn how to crack and code .NET applications, as im sure most of you get confused by other crackme's that are designed to be hard to break.

So enjoy, and please feel free to post any comments or questions.

<<--Task-->>

Your task it to create a keygen for this crackme, which uses a simple but effective algorithm to generate a serial from a given name.

First you have to learn what the algorithm is doing, then remodel it to work in your favour, and finally incorporate it into a keygen.

<<--Rules-->>

1) No patching
2) No bruteforcing
3) Find a valid name and serial, then submit a keygen and a good tutorial. The keygen can be coded in any language that takes your fancy :-)

Good luck, and enjoy!!!!!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 28. May, 2008
Downloads: 855

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by fArse, published 11. jul, 2008; download (2 kb), password: crackmes.de or browse.

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Solution by born2c0de, published 04. jun, 2008; download (34 kb), password: crackmes.de or browse.

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Discussion and comments

obnoxious 30. May 2008	i'll leave it for the newbies. in the mean time i'll upload the solution to your crackme#1
costy 31. May 2008	SHA1CryptoServiceProvider waht is this??
obnoxious 31. May 2008	@costy sha1 cryptoserviveprovider is similar to md5 cryptoserviveprovider. they are necessary in finding the sha1 and md5 hashes.
MulleDK13 31. May 2008	Ya, it was easy :) I wrote a keygen in 5 minutes (C#)
born2c0de 01. Jun 2008	Solution submitted. Awaiting Approval. Interesting Algorithm.
k3nny 01. Jun 2008	All this for a small seriel number .. :-)
costy 03. Jun 2008	i cannot make it. the problem is i usually code in visual basic .net I don't know how to use SHA1cryptoserviveprovider. (i had the same problem with md5cryptoserviceprovider). I have always to give up when i find a crackme written with this instruction becouse i cannot code it with visual studio. The great problem is that people usually write keygen in c#. So i cannot learn how to bypass this problem. So can anyone help me?? For example... How I can generate the md5 or the sha1 code of the string "hello"?? I hope that someone will help me.
TiGa 03. Jun 2008	This is not the first crackme that uses MD5. You can always search for other crackmes that used it and read the solutions.
costy 03. Jun 2008	yes TiGa... but the keygen in other solution is made with C#. I would like to know how to do it in vb .net
w02057 Author 04. Jun 2008	Here costy; Private Function md5(ByVal sInput As String) Dim md5Obj As New Security.Cryptography.MD5CryptoServiceProvider Dim sBytes() As Byte sBytes = System.Text.Encoding.ASCII.GetBytes(sInput) sBytes = md5Obj.ComputeHash(sBytes) Dim sOutput As String = "" For Each b As Byte In sBytes sOutput += b.ToString("x2") Next Return sOutput End Function You input the string to encrypt in md5 as sInput, and it will convert it to byte form, encrypt each byte, then reconstruct the bytes to a string. sOutput is then returned, which is the md5 version of sInput So to use this to encrypt "hello", just run md5("hello") and it will return its hash. Hope this helps,
costy 04. Jun 2008	yes, a great help! a also have written this routine. Aproximatly identical to your routine. It calculate sha1. :-) Private Function sha1(ByVal sInput As String) Dim md5Obj As New Security.Cryptography.SHA1CryptoServiceProvider Dim sBytes() As Byte sBytes = System.Text.Encoding.ASCII.GetBytes(sInput) sBytes = md5Obj.ComputeHash(sBytes) Dim sOutput As String = "" For Each b As Byte In sBytes sOutput += b.ToString("x2") Next Return sOutput End Function
w02057 Author 04. Jun 2008	you might want to change the md5Obj variable to sha1Obj, lol! :)
costy 06. Jun 2008	yes... it should be better! But it works because the variable name isn't not so important.
erudite 06. Jun 2008	Submitted solution for anyone who may prefer a solution written in C#. (Not a VB man myself). Algorithm seemed a little over-elaborate for a base newbie crackme, but who am I to say? By the way, remembering null-base versus 1-base indices is a tricky proposition at times.

w02057's Ultimate Kit for Newbies, all tools included

Download CrackmeKit.zip, 2152 kb (password: crackmes.de)
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<<--ThE UlTiMaTe N00b KiT!!-->>

The ultimate set of Crackme's for you n00b's out there, very easy and a great selection for you to learn the basics of cracking .NET applications. All tools needed are also included.

Enjoy, and if you have any comments or questions then dont hesitate to post them!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 26. May, 2008
Downloads: 1779

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by M|GHTY K|nG, published 17. mar, 2009; download (254 kb), password: crackmes.de or browse.

M|GHTY K|nG has rated this crackme as nothing special.

Solution by The So;X, published 29. may, 2008; download (441 kb), password: crackmes.de or browse.

The So;X has rated this crackme as quite nice.

Solution by costy, published 29. may, 2008; download (42 kb), password: crackmes.de or browse.

costy has rated this crackme as awesome.

The submission of solutions is closed.

Discussion and comments

neo_40 26. May 2008	thanks for this i will learn to use the reflector but if you can just tell how to make those........ Thankyou
w02057 Author 27. May 2008	Hi neo_40 I wrote the crackme's in Microsoft Visual Basic Studio 2005 using the .NET framework, so your gonna need to learn a language like VB before you can start writing any sort of program. There isn't just one way of doing things, so you need to learn it for yourself ;) If you send me your email address, I will gladly send you the VB source code for all of the crackme's, so you can relate the code to what the crackme is doing. Thanks,
costy 27. May 2008	I sended a solution. It isn't necessary to learn vb. Net Reflector lets you to choose the language. For example you can see the source in c#. I prefer vb :-)
The So;X 27. May 2008	Hey nice crackmes. I send the solutions.
w02057 Author 27. May 2008	Hi The So;x Great that you liked them!, now have a go at my "harder" ones. Ive got another that im waiting to be moderated that ive based on cryptographic puzzles!
w02057 Author 27. May 2008	Yea sorry costy I left that bit out ;)
The So;X 28. May 2008	yo man i have problem in one of your previous crakme could u please help me out
costy 28. May 2008	Reflector doesn't want to load some add-ins included in the crackme
obnoxious 28. May 2008	costy some of the dll's are part of the reflexil. so they cant be loaded the "fireball" series and the "mono" series are parts of the reflexil plugin
w02057 Author 28. May 2008	Hi So;X whats your problem?
w02057 Author 29. May 2008	Thanks So;X and costy for your great tutorials, they really are the biz! :) One slight error I made in the clues file included with the package, I said the mid() function is passed a string and a start and an end position for which bit of the string to return. Actually, the end number is actually the length of the string, so something like; mid("iamastring",3,5) won't return char's 3-5 ("mas"), it will start at char 3 and count 5 chars instead, therefore returning "mastr". Hope ive NOW made this clear, Thanks again guys, w02057
xbiohazardx 31. May 2008	ive cracked the first one :) cant get the second one though
xbiohazardx 31. May 2008	got the second one too :)
w02057 Author 31. May 2008	The solutions from The So;X and costy guide you though it.....
xbiohazardx 31. May 2008	got them all now this helped a lot thanks
k3nny 01. Jun 2008	Thats a nice tutorial to start-off. Thank you!
xled 20. Feb 2009	Nice Excercises for Beginners :-)
M\|GHTY K\|nG 09. Mar 2009	Hi everyone, I wrote a better tutorial for new runners. Just check it out
RipperRoo 29. Jul 2015	Fast forward to 2015, i enjoyed every single one of these, got through all 5, this is a great entry point.

w1ll's Simple Math VB KeygenMe

Download vb_keygenme.zip, 6 kb (password: crackmes.de)
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Simple Math VB Keygen Me

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: (Visual) Basic

Published: 23. Jun, 2004
Downloads: 709

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Solutions

Solution by kRio, published 25. jun, 2004; download (7 kb), password: crackmes.de or browse.

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indivisible_int 23. Aug 2007	I think I solved it. It's not so hard, really. I try to write a solution.
waganono Author 23. Aug 2007	Your just have found a bug. Sorry, that's because of last cmp, i made a mistake. I'll update it as soons as possible.
alex_ls 25. Aug 2007	The crackme hasn't been updated yet? I've submitted solution and keygen before reading this comments.
waganono Author 26. Aug 2007	Now crackme is updated, no more bugs! Algorithm is the same.
mcpower 26. Aug 2007	do you want a key generator or is patching allowed aswell? because this would be a very easy task simply by patching on offset 10d5.
Ox87k 27. Aug 2007	Alex_ls, your keygen doesn't work for me :( It's return only B and F in the serial, like ox87k/BBBBBFFFFF Is it only a my problem?
waganono Author 27. Aug 2007	Alex_ls has coded a keygen which work only for bugged version. Now crackme is re-updated. No more bugs! @Ox87k : I hope you'll own it!
alex_ls 27. Aug 2007	I have updated the solution for the new version of crackme
alex_ls 27. Aug 2007	waganono: I like this crackme, but you should apply some crypting elements to prevent generating the same keys for the different names!
waganono Author 27. Aug 2007	I agree with you, first i just wanted to make a keyfile.... I'm waiting for your solution.

waganono's Root Me #1

Download RootMe.zip, 192 kb (password: crackmes.de)
Browse contents of RootMe.zip

RootMe #1 by waganono

It's a standard crypto-keygenme.
You have to write a keygen.

No anti-debug tricks.
Modular arithmetic must be you friend :)

Solution code is not too long to write in C with standard libraries.

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 14. Feb, 2011
Downloads: 509

Rating

Votes: 4
Crackme is good.

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Solutions

Solution by tamaroth, published 15. mar, 2011; download (954 kb), password: crackmes.de or browse.

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Solution by andrewl.us, published 04. mar, 2011; download (35 kb), password: crackmes.de or browse.

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Solution by Dcoder, published 04. mar, 2011; download (431 kb), password: crackmes.de or browse.

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Discussion and comments

promix17 14. Feb 2011	Why is it packed by UPX? Where are the rules?
andrewl.us Moderator 14. Feb 2011	yes promix17 its fixed! now check out this cool crackme :)
maracuja 22. Feb 2011	Follow the andrewl.us, It's crackme is really fun despite it's not packed by upx. Doh upx :> :)
tamaroth Moderator 04. Mar 2011	Awesome job! At the moment of you releasing the solutions I'm still factorizing the modulus, hopefully i can finish my keygen soon!
yo-mismo 06. Mar 2011	i have attempping to solve it near 3 days. I'm too noob (and non-english speaker), but i gonna solve it without solution... Very cool crackme :)
Numernia Moderator 06. Mar 2011	really great solutions, good job! ^^
tamaroth Moderator 08. Mar 2011	Despite the fact that there are already 2 solutions to this great crackme, I'm writing one as well. Hopefully it will shed some light on few more complicated things :)
waganono Author 09. Mar 2011	Very nice solution from andrewl.us and Dcoder. Congratulations and hope i see you for next chapter :)
tamaroth Moderator 15. Mar 2011	Solution uploaded as well, fun kgme! :)
waganono Author 17. Mar 2011	Thx, nice solution too

waganono's Root Me #2

Download RootMe2.zip, 186 kb (password: crackmes.de)
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###########################
# RootMe #2 by waganono #
###########################

It's another crypto-keygenme a bit more difficult than previous one.
You have to write a keygen, there are many solutions for a given username.

Modular arithmetic must be you friend here too :)

Please root me!

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: C/C++

Published: 18. Mar, 2011
Downloads: 358

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Solutions

Solution by Dcoder, published 24. mar, 2011; download (808 kb), password: crackmes.de or browse.

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Discussion and comments

Xspider 19. Mar 2011	i like the effect :)
yo-mismo 19. Mar 2011	i like the difficulty :)
Cooty125 20. Mar 2011	Oh This is so hard for me :-(
waganono Author 24. Mar 2011	Congratulations Dcoder, very nice job and tutorial.

waganono's Waga Invader

Download WagaInvader.zip, 1339 kb (password: crackmes.de)
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It's a crypto crack me. In fact, it's a game, you have to find a serial (or more) to unlock secret level!

You need OpenGL.

==> Readme.txt for more informations
wokanono@gmail.com

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: C/C++

Published: 15. Aug, 2007
Downloads: 783

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Solutions

Solution by Ox87k, published 27. aug, 2007; download (193 kb), password: crackmes.de or browse.

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Discussion and comments

Haykuro 15. Aug 2007	I found the routine, i think.. and does "GA******" have anything to do with it?
KernelJ 15. Aug 2007	There seems to be something wrong with the full screen mode. For me anyway...
waganono Author 15. Aug 2007	@Haykuro That's the good way.... @KernelJ I'am bad OpenGL coder, crackme displays in 800*600 windowed, F5 enters full screen mode but does not work perfectly, sorry...
HMX0101 15. Aug 2007	Seems to be RSA... but i don't think so, since E isn't relatively prime to (p-1)(q-1)... so i can't calc D using default E... any ideas?
KernelJ 16. Aug 2007	"In fact, it's a game, you have to find a serial" i.e. the method for checking the serial isn't important in a lot of ways. You just have to find a serial that works, which could be done by hand I'm sure. And obviously there will be at least one serial available... (I'm guessing 'or more' means that the author doesn't know whether or not there are more :P) Bruteforcing may also be a possibility here, but I'd have to look into whether that is necessary... @waganono maybe after I learn OpenGL I might be able to spot where the problem lies, but not before. If anyone is reading this knows OpenGL then please look into this one!
waganono Author 16. Aug 2007	"method for checking the serial isn't important in a lot of ways" You doesn't have understood anything, you can bruteforce (or patch), it works, yet but it's not interesting. "(I'm guessing 'or more' means that the author doesn't know whether or not there are more :P)" I have a working keygen for this one without any bruteforce.
happytown 22. Aug 2007	I can't believe you can make a valid keygen.....even you are the author.....
Ox87k 22. Aug 2007	lol! I solved it but i'm writing the solution yet.
waganono Author 27. Aug 2007	Your tutorial is excellent! Good job! Everything is explained, nothing more to say. Thanx a lot
andrewl.us Moderator 04. Apr 2008	Ox87k: what initially clued you that it used MIRACL? The sig file you use from the French site, would it work if MIRACL were compiled with a different compiler, or with different optimization options?

warleyalex's Ante DeDe crackme

Download d3.zip, 112 kb (password: crackmes.de)
Browse contents of d3.zip

Ante-dede function Revering ==========================================
Hi there,

This is my 1st. Crackme, it was compiled in Delphi3 (the best RAD).
It has a Anti-dede function on it.

Procedure Anti_Dede;
var
zHandle:THandle;
i:integer;
begin
zHandle:=FindWindow(nil,'Dede');
if zHandle<>0 then
begin
For i:=1 to 4500 do
SendMessage(zHandle,WM_CLOSE,0,0);
end;
end;

===============+==========================
I'm studing reversing with Delphi using the outstanding tool DeDe by DaFixer and the magnificent OllyDBG, so I decided to write this D3 app because i have a doubt:
How to find a Crypitted string in OllyDBG without using DeDe chr(64)+chr(65)+chr(64)+chr(65)?
It was classified by: VERY EASY because the procedure is no more that:

procedure TPasswordDlg.Button1Click(Sender: TObject);
begin
if password.text = senha then
showmessage ('Good') else
showmessage('Bad');
End;

Strings are encrypted of course if a lame function.
=========================================
The goals is to break "DeDe function" and find the password and
write a tutorial explaining this secret of OllyDBG finding unsuspects strings without brute force.
Everything is allowed. OK

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 31. Jan, 2007
Downloads: 479

Rating

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Solutions

Solution by idid231, published 09. jan, 2013; download (594 kb), password: crackmes.de or browse.

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Discussion and comments

BaKaE 31. Jan 2007	so cool !! ps: the "cancel" button didn't work. close-buttons needs only one order -> "close;"
dreak 31. Jan 2007	Quite nice but because it uses the same function to 'crypt' the strings it's pretty easy to find.
warleyalex Author 04. Feb 2007	Oh my God, I forgot to encrypt this function!!! Wait. Did you achieve breaking my ante-dede function? How and where get the point.

warleyalex's Delphi for PHP crackme

Download Project7.zip, 113 kb (password: crackmes.de)
Browse contents of Project7.zip

Project: Delphi for PHP crackme

Protection in EXE: NONE
This crackme was based on Delphi for PHP project.
PHP is a server-side application script. In this project, i used several languages: php, javascript, html and delphi to compile the crackme.

Imagine you need a valid username and password to enter in that dreamed porn site, but it restricted. My crackme tries to simulate something like this.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 30. Aug, 2007
Downloads: 766

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by DigitalAcid, published 28. sep, 2007; download (534 kb), password: crackmes.de or browse.

DigitalAcid has rated this crackme as boring crap.

Solution by zart, published 07. sep, 2007; download (9 kb), password: crackmes.de or browse.

zart has rated this crackme as nothing special.

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Discussion and comments

zart 30. Aug 2007	this thing is making my eyes cross but i think I almost have it... very strange crackme...
zart 30. Aug 2007	ahh done, not that hard after you figure out what your actually looking at...
warleyalex Author 31. Aug 2007	That's it. First look can be deceiving. People use this kinda protection in PHP and javascript. And the security is down. If I had encrypted the strings with a better xor and my secret protection, things could be ugly. But for now, it just that. Congratulations, Best regards, Dr.Osama

warleyalex's kylix crackme

Download crackme.zip, 223 kb (password: crackmes.de)
Browse contents of crackme.zip

Kylix crackme
Language: Borland Kylix
OS: Linux
*************************************************************************
Kylix is a powerful language for Linux environment.
You can create high-performance applications, unfortunately
the footprint generated by the compiler is very huge,
I think is difficult to break crack crackmes made in kylix,
I don't know, once I release this same crackme made in Delphi
I think I put level EASY. Nothing changed, is the same code,
but it works in Linux OS, I think i will put level I LITTLE BRAIN
to break in. I don't now how to break, I try to use IDA for Win32,
but I don't have a emulator for win to run in Linux applications, I'm
a little crazy, i debug/crack the linux executables in Windows environment
and then i test in Linux, to see the modifications.
***************************************************************************
Any solutions, send me,

Glad you could help,

Regards,
warleyalex@yahoo.com.br

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Borland Delphi

Published: 03. Jan, 2008
Downloads: 357

Rating

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

lagalopex 03. Jan 2008	$ ./crackme ./crackme: symbol lookup error: ./crackme: undefined symbol: initPAnsiStrings $ ldd ./crackme linux-gate.so.1 => (0xffffe000) libX11.so.6 => /usr/lib32/libX11.so.6 (0xf7e9c000) libpthread.so.0 => /lib32/libpthread.so.0 (0xf7e85000) libdl.so.2 => /lib32/libdl.so.2 (0xf7e81000) libc.so.6 => /lib32/libc.so.6 (0xf7d51000) libXau.so.6 => /usr/lib32/libXau.so.6 (0xf7d4c000) libXdmcp.so.6 => /usr/lib32/libXdmcp.so.6 (0xf7d46000) /lib/ld-linux.so.2 (0xf7fab000) Whats wrong? Do I miss something?
bulkangel 04. Jan 2008	hum, I solved the problem by doing this: LD_PRELOAD=/opt/kylix3/libborqt-6.9-qt2.3.so ./crackme You just have to check the path where your kylix lib is. +
lagalopex 04. Jan 2008	There seems to be no stable kylix for amd64... I am sorry ;)
warleyalex Author 06. Jan 2008	I tested this crackme in another linux distro. This application generated by kylix indeed looks for ibborqt-6.9-qt2.3.so. If you have this library in your sistem do this: LD_LIBRARY_PATH=/usr/lib and then ./crackme this should work. Unfortunately, i believe most of users don't have this library, so i will ask the administrator if i can send another crackme made in Kylix, (the same code) but compiled in console mode. That's it.
pof_es 14. Jan 2008	The library can be downloaded here: http://sourceforge.net/project/download/crackme.ziping.php?groupname=kylixlibs&filename=kylixlibs3-borqt-3.0-2.tar.gz&use_mirror=puzzle

Warning's KeyGenMe #1 by Warning

Download KeyGenMe_#1_By_Warning.zip, 5 kb (password: crackmes.de)
Browse contents of KeyGenMe_#1_By_Warning.zip

Need special knowledge.

Rules:
-No patching allowed
-No crack allowed
-Find the good key !
-Write tutorial for solution

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 12. Dec, 2008
Downloads: 478

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by ORacLE_nJ, published 28. nov, 2009; download (30 kb), password: crackmes.de or browse.

ORacLE_nJ has rated this crackme as quite nice.

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Discussion and comments

ORacLE_nJ 17. Nov 2009	I've found a key for the keygenme... But i cant keygen it... Is that enough for a solution??
ORacLE_nJ 23. Nov 2009	Here's my soln. At last i keygenned it..!
Warning Author 14. Jul 2012	Oh great ! Bravo ! ;)
iLovro 14. Jul 2012	Lol how come you replied 3 years later? :P

warrantyVoider's do not call

Download donotcall.zip, 147 kb (password: crackmes.de)
Browse contents of donotcall.zip

This normal C++ program is married to a dongle driver that makes debugging difficult. No obfuscation, just genuine weirdness.

To solve the crackme:

=> free it from the dongle driver
OR
=> write a keygen

Compatibility: SINGLE PROCESSOR ONLY! No hyperthreading etc.

If you solve one or both of the problems, please submit a solution. Please do NOT post "i h4ve teh unpacked at hxxp://popups.com/broken/link.exe".

Have Fun!
WV

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 29. Sep, 2006
Downloads: 647

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by deroko, published 02. oct, 2006; download (252 kb), password: crackmes.de or browse.

deroko has rated this crackme as quite nice.

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Discussion and comments

crp- 29. Sep 2006	hehe, this crackme might be incompatible with some rootkits/protections/"security software"
D4ph1 29. Sep 2006	i think this program something did to my memory. after i run it and try to open it with olly i cant open any program with olly because of "dont know how to step because memory at address xxxxxxxx is not readable etc" error. Plz help!
evo_it 29. Sep 2006	try rebooting :P
crp- 29. Sep 2006	olly wont be of much use anyways...
warrantyVoider Author 29. Sep 2006	Sorry, D4ph1. I should have made the driver better behaved. Yes, after a reboot your system will be fine again. (This is why I recommended VMWARE.)
deroko 29. Sep 2006	nice crackme, a little VM here also :)
D4ph1 30. Sep 2006	Thank you guys for remind me rebooting :p btw nice crackme! if someone writes a solution please make it a good one for newbies like me :)
deroko 01. Oct 2006	is emulation dll an option? there is way too much stolen opcodes, I have fixed the ones that are executed, but others are emulated trough .dll.
warrantyVoider Author 02. Oct 2006	Hey, deroko, I'm happy you are working on my crackme. DLL injection is great! It sound like you set up your own SEH-handler or hook that emulates the opcodes and writes a log. And you wrote a program that fixes all the addresses mentioned in the log? Cool. I guess the fixed program will run faster now. On my computer the protected one runs almost 2000 times slower... I did the stealing with a IDC script that writes all worthy addresses to a log and a java prog that uses the log to patch the program. Maybe the other solution would have been a IDC script that lets IDA figure out which 0xCC is a stolen opcode and which isn't. Nah, I like the DLL better.
deroko 02. Oct 2006	Well I wrote my simple disassm engine to mark and disassembly known procedures. It screwed a few opcodes and I had to fix those manualy, others that are not fixed are being emulated trough .dll :)
warrantyVoider Author 02. Oct 2006	Just downloaded your solution. I see your nonintrusive debugger in action again. Nicely done!
deroko 02. Oct 2006	hehe :) you always make nice crackmes for brainbusting ;)

warrantyVoider Author 24. Jul 2005	Sorry everybody! Contrary to the readme the program does NOT run on windows2000, only XP. As compensation and to make it a bit easier I will give you a valid serial to test whether it runs correctly on your computer: Name: "crackmes.de" Serial: "=>1803606519" technobabble: I tested it on 3 computers, but all were running XP ;-( Sorry. Apparently SEH-Handlers have to preserve ESI & EDI, and I failed to put in a rule to that effect. XP seems to forgive, W2k does not.
andrewl.us Moderator 03. Sep 2010	congrats to alex_ls for an impressive solution to a long-standing crackme
jE! 26. Sep 2010	probably i not examined this crackme also bcoz of MFC71 requirements..
jE! 26. Sep 2010	alex_ls, where is DEPROTECTED crackme?
alex_ls 27. Sep 2010	jE!, In my solution I just described the way how to decrypt the protected functions with a trivial tracer. Removing the protector of crackme will take too much time(analyzing decrypted code,making a dump or connections - all of this is a manual process). Sorry, I couldn't code the generic unpacker! If someone can do it,please,upload the solution.
jE! 28. Sep 2010	drop it. just asked, bcoz 2-stage was about it.

warrantyVoider's keyfile

Download crackme.zip, 14 kb (password: crackmes.de)
Browse contents of crackme.zip

Your task is to create a correct keyfile.

I hope you have a lot of fun.

Breaking the string obfuscation is not necessary, break it only if you are really bored ;-)

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 30. Aug, 2005
Downloads: 858

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by Requiem, published 29. oct, 2005; download (43 kb), password: crackmes.de or browse.

Requiem has rated this crackme as quite nice.

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Discussion and comments

Ox87k 04. Sep 2005	use the CryptCreateHash and other Crypt's call in the advapi32.dll, right? It's so complicated for me because it's my first crypto crackme... :\|
_HellDashX_ 04. Sep 2005	This crackme uses MD5 hash. You can found it if use PEiD, is easy, :) But, one thing in the crackme is a little more difficult
warrantyVoider Author 04. Sep 2005	Ox87k, the md5 part is easier than it seems, you might find this website useful: http://gdataonline.com/seekhash.php
Oorja-HalT 04. Sep 2005	Well i am surprised MD5 and all that. The key file i have contains just a simple string and the message keyfile accepted
Oorja-HalT 04. Sep 2005	Well i am surprised MD5 and all that. The key file i have contains just a simple string and it generates the message keyfile accepted
Ox87k 04. Sep 2005	hum... but peid with krypto plugin don't tell me MD5. ^^' i'm so confused! btw, i try to keygen it... thanks for this keyfileme :)
warrantyVoider Author 04. Sep 2005	Oorja-HalT, does your simple keyfile still work when you are not using a debugger?
Oorja-HalT 05. Sep 2005	yes it does with debugger loaded/unloaded BTW i tried in win98 .Does that effect I have the keyfile details in your PM
warrantyVoider Author 05. Sep 2005	LOL, Oorja-HalT, now this explains everything. The crackme is flagged "Windows 2000/XP only" for a reason. The santa claus thing is a joke. The logic is "if (debuggerpresent()) checkForSanta() else checkForRealKeyfile()". The debuggerCheck was made for w2k/xp and caused "undefined behaviour" or W98. It could have crashed/whatever, but in your case it caused a false positive, so you were stuck with santa. Sorry. Maybe next time I should check the OS version...
Oorja-HalT 05. Sep 2005	Yeah thats it then. And i was a bit surprised because yoour earlier crackmes were quite difficult and compared to thta it cant be such a sweet walk over. But wait I tried the crackme in WinXP and it works .Besides i dont have debugger in WinXP. So maybe your intention was as you mentioned but its not working as you have desired. Besides why its giving the keyfile accepted message.
Ox87k 05. Sep 2005	@Oorja-HalT why don't try olly? Btw, this crackme make me crazy, but only because i hate crypto.. uff... :)
Oorja-HalT 06. Sep 2005	What i meant is 0X87 I am not using debugger in winXP Therefore if (debuggerpresent()) checkForSanta() else checkForRealKeyfile()" should check for realkeyfile And if the key file is Santa then it should generate wrong message but it is not So debuggerpresent check is failing
warrantyVoider Author 06. Sep 2005	Ok, Oorja-HalT, sorry, I have no clue whatsovever why it gives false positive on your machine. I just tested this on W2K and 2 different XP flavours and it works fine. The debugger detection is between 4016D7 and (including) 4016EC, so anybody having problems with it please just overwrite that part with NOPs. If anyone else has problems or is stuck just PM me.

warrantyVoider's lost

Download lost.zip, 14 kb (password: crackmes.de)
Browse contents of lost.zip

Ok, this is an easy but hopefully fun one.

Figuring out how the serial works should be pretty easy.
Writing the keygen will involve a bit of thinking, forget about bruteforcing.

- pure C
- no countermeasures
- my first keygen with NO OBFUSCATION AT ALL Yeah!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 25. Sep, 2005
Downloads: 881

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Solutions

Solution by NoRG, published 02. oct, 2005; download (22 kb), password: crackmes.de or browse.

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Discussion and comments

warrantyVoider Author 01. Oct 2005	155 downloads and no solution? Are my ideas getting too crazy? - I was joking in the readme. No, you donÂ´t have to find the most efficient serial, and of course you can or should use some sort of bruteforce. - If youÂ´re stuck PM me. IÂ´ll help if I can.

warrantyVoider's Message for you!

Download messageforyou.zip, 130 kb (password: crackmes.de)
Browse contents of messageforyou.zip

ArenÂ´t you bored of programs that always execute their instructions in the same order?
We simulate a message-driven application that executes not only the serial checker but also other less useful operations.

(Fear not: This is not the work of the dreaded Haystack-assembler-generator but real C++ created by a simple script...)

Difficulty: 3 if you have IDA PRO, more if you don't.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 20. Feb, 2006
Downloads: 990

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Solutions

Solution by jE!, published 25. nov, 2007; download (150 kb), password: crackmes.de or browse.

jE! has rated this crackme as quite nice.

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warrantyVoider Author 01. Nov 2005	Correction: I removed the part that detects softice and crashes the computer, itÂ´s not a really nice thing in a crackme. I donÂ´t want anyone to lose the connection to his pr0n torrent ;-)
deroko 01. Nov 2005	nice iat obsfucation =)
deroko 01. Nov 2005	yah, solution submitted, great crackme =)
warrantyVoider Author 01. Nov 2005	My evil schemes have been thwarted again! Now I will have to descend to my secret lab and invent something new. ;-)
bigboss1988 01. Nov 2005	Good job, deroko ;) very nice crackME warrantyVoider :)

warrantyVoider's The secret of the invisible lookup table

Download tableCrackme.zip, 286 kb (password: crackmes.de)
Browse contents of tableCrackme.zip

And now for something completely different...
Easy once you figure out what it is all about. But will you ever?

=> XP/W2K only
=> WARNING: Read the readme before doing anything.

Difficulty: 5 - Professional problem to solve
Platform: Windows 2000/XP only
Language: C/C++

Published: 26. Dec, 2005
Downloads: 1597

Rating

Votes: 7
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by rAsM, published 27. jun, 2008; download (319 kb), password: crackmes.de or browse.

rAsM has rated this crackme as quite nice.

Solution by zairon, published 25. jun, 2006; download (624 b), password: crackmes.de or browse.

zairon has rated this crackme as quite nice.

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Discussion and comments

warrantyVoider Author 27. Dec 2005	Oops, typo in the readme, the valid username/serial combo is of course "warrantyVoider"/"5B55873D", not "warantyVoider".
jB_ 28. Dec 2005	Good stuff, warrantyVoider. I feel (and know) what is involved, but I don't have the right tools where I am. As I don't want to cheat analysing the first program, I'll finish it as soon as I am back with my beloved environment. I enjoy such crackmes =)
warrantyVoider Author 28. Dec 2005	Thanks, jB, I'm looking forward to your solution. BTW everybody: Little misunderstanding, analysing the first program isnÂ´t cheating, itÂ´s just a bit bifficult. If you can unpack it, more power to you. But there are simpler ways to get an idea what a program is doing. Have fun!
jB_ 30. Dec 2005	Your crackme is good =) Keygen done, but I don't know what to write as a solution...: once you have figured what is involved, there is no need for explanations... You can find my keygen on my website: http://jardinezchezjb.free.fr .
warrantyVoider Author 31. Dec 2005	Good work jB, happy new year!
jB_ 01. Jan 2006	Happy new year =)
Ox87k 26. Jun 2006	zairon, amazing work! very good job warranty ;)
warrantyVoider Author 28. Jun 2006	Zairon, well done! This is a really powerful tool you created there.
zairon Moderator 29. Jun 2006	Glad to see you like it. Thank you :)
rAsM 26. Jun 2008	Very nice crackme. It was a pleasure to keygen it :)

warrantyVoider's WTF

Download crackmeWTF.zip, 10 kb (password: crackmes.de)
Browse contents of crackmeWTF.zip

This one does a really weird thing I havenÂ´t seen in any other crackme, will you find out what it is?

ItÂ´s a lot less scary than it looks. At some point you should scream "HEUREKA!"...

Tested on XP and W2k. Please donÂ´t use on other OS versions!

Have fun, write a keygen!
WV

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: C/C++

Published: 22. Aug, 2005
Downloads: 855

Rating

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Solutions

Solution by jE!, published 27. aug, 2005; download (32 kb), password: crackmes.de or browse.

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Solution by psych1c, published 25. aug, 2005; download (62 kb), password: crackmes.de or browse.

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Send a message to WarRock »

View profile of WarRock »

Discussion and comments

TQN 22. Aug 2005	Hi warrantyVoider ! Did you test and sure that all explorer.exe in Win2k/XP will have the string "This program xxx" at addess 0x100004E. I think I can hardcode this string in my keygen, and this way is shorter than using Toolhelp API/PSAPI to read explorer's memory.
warrantyVoider Author 22. Aug 2005	Hi TQN, of course, feel free to hardcode this string. It seems to be identical in W2K and XP. Also it seems this string does not get changed in international versions of Windows. (Hardcoded in the compiler I guess.). Greetings, WV ps: While the string is identical, the image base is not. Under W2K explorer.exe loads at 0x400000, under XP itÂ´s 0x1000000.
jE! 27. Aug 2005	weep, strange, i missed fact of other submittion, & written quite identical solve.. aniway submitted..

WarRock's KeygenMe #3 WR

Download KM3W.zip, 235 kb (password: crackmes.de)
Browse contents of KM3W.zip

Just do a Keygen!

NEVER PATCH! OR FISH!

enjoy!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 30. Sep, 2008
Downloads: 560

Rating

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Solutions

Solution by Alsor, published 12. oct, 2008; download (583 kb), password: crackmes.de or browse.

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Discussion and comments

warsaw's Invisible Java Crackme

Download invisible.zip, 2 kb (password: crackmes.de)
Browse contents of invisible.zip

Is this the real code, or is it just fantasy...

Find the string you need to pass on the commandline for the program to print out "Correct!". Make sure that your answer works in the unmodified program, running on the official Java release from Oracle.

Difficulty: 4 - Needs special knowledge
Platform: Multiplatform
Language: Unspecified/other

Published: 01. Jul, 2014
Downloads: 185

Rating

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Solutions

Solution by boonz, published 07. jul, 2014; download (48 kb), password: crackmes.de or browse.

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Discussion and comments

warsaw Author 02. Jul 2014	Note, this crackme is designed for Hotspot. It won't work properly on alternative JVM implementations.
boonz 02. Jul 2014	for (int i = 1; i < 32; i++) { array[i] = (char) (array[i] ^ array[i * 123456 % 31] & 0x1F); } The hash function must be brute-forced because it takes the least 5 bits using binary AND which cannot be inversed?
warsaw Author 06. Jul 2014	No brute forcing is required. That operation is invertible.
marcoventuri 06. Jul 2014	sorry,i wrong solution
Dark_Prince 14. Sep 2014	What a nice solution! Well done boonz.

warsaw's Java Crackme 1.1

Download crackme1.1.jar.zip, 2 kb (password: crackmes.de)
Browse contents of crackme1.1.jar.zip

A simple jar which takes a single number on the commandline as input. The goal is to figure out which number you need to make it print 'Correct'

This should be straightforward if you understand Java bytecode, but I threw in a trick to make disassembly more difficult.

Difficulty: 3 - Getting harder
Platform: Multiplatform
Language: Unspecified/other

Published: 14. Aug, 2012
Downloads: 182

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by Extreme Coders, published 19. may, 2015; download (136 kb), password: crackmes.de or browse.

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Solution by aodrulez, published 04. sep, 2012; download (1041 kb), password: crackmes.de or browse.

aodrulez has rated this crackme as quite nice.

Solution by lab27, published 04. sep, 2012; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

idid231 20. Aug 2012	Your crackme does not run on my system, i double click, run by KEmulator, both don't work. What can i do to test my solution?
warsaw Author 22. Aug 2012	Does KEmulator give an error of some kind? I have no idea why it wouldn't run for you.
Dark_Prince 25. Aug 2012	I have JRE on my system but when i double clicked on your crackme(running through java SE platform binary) it is not opening......what is the problem? same problem for your crackme 2.1.
d0ping 25. Aug 2012	>>>it is not opening. I guess, it's because of crackme's nature! It's a console app. to start: run in your console: java -jar "path/crackme.jar"
warsaw Author 26. Aug 2012	More specifically, you need to do java -jar "path/crackme.jar" yournumberhere
d0ping 26. Aug 2012	>>>More specifically, you need to do java -jar "path/crackme.jar" yournumberhere somebody can consider this as a hint)
aodrulez 28. Aug 2012	duh! i submitted a solution & realized i've made a stupid mistake in it. Have made a corrected version but i guess i cant reupload. :-/
aodrulez 28. Aug 2012	nevermind. :) figured it out.

warsaw's Java Crackme 1.2

Download crackme1.2.zip, 761 b (password: crackmes.de)
Browse contents of crackme1.2.zip

The idea for this crackme is similar to 1.1, but it should prove a little harder.

Note: This crackme was tested with the official JVM (Hotspot). It is not guaranteed to work with alternative JVM implementations.

Difficulty: 3 - Getting harder
Platform: Multiplatform
Language: Unspecified/other

Published: 07. Apr, 2013
Downloads: 126

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Solutions

Solution by xcodevn, published 26. mar, 2014; download (1 kb), password: crackmes.de or browse.

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Solution by blin00, published 23. apr, 2013; download (738 b), password: crackmes.de or browse.

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Discussion and comments

mopy 08. Apr 2013	The upload seems to be incomplete or damaged.
cyclops Moderator 08. Apr 2013	@mopy: why do you think so?
warsaw Author 08. Apr 2013	@mopy, I just downloaded and tested it, and it runs just fine. You need to run it from the command line with your answer as a command line argument.
boonz 08. Apr 2013	@mopy java -jar crackme1.2 serial
Gogil 12. Apr 2013	I have disassemble the Java bytecode. Key checking algorithm was very simple. (mul, add) but it is impossible. because decimal point is lost. This algorithm is possible?
blin00 14. Apr 2013	Yes - I submitted a solution (still in queue...)
Gogil 16. Apr 2013	Very good Crackme! I have solved it.

warsaw's Java Crackme 2.1

Download crackme2.1.jar.zip, 1 kb (password: crackmes.de)
Browse contents of crackme2.1.jar.zip

A simple jar which takes a single number on the commandline as input. The goal is to figure out which number you need to make it print 'Correct'

This one actually requires you to reverse engineer a verification function, though it's still relatively simple (around 70 bytes).

Difficulty: 4 - Needs special knowledge
Platform: Multiplatform
Language: Unspecified/other

Published: 14. Aug, 2012
Downloads: 191

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Solutions

Solution by lab27, published 04. sep, 2012; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

warsaw's Java Crackme 3

Download crackme3.zip, 3 kb (password: crackmes.de)
Browse contents of crackme3.zip

As before, you need to figure out the key to make it print "Correct!". However, this one should be much harder.

It took me over a week to create this, so I hope you have as much fun and difficulty cracking it as I did writing it. Good luck!

Difficulty: 5 - Professional problem to solve
Platform: Multiplatform
Language: Java

Published: 14. Oct, 2012
Downloads: 414

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by ReWolf, published 19. feb, 2014; download (910 kb), password: crackmes.de or browse.

ReWolf has rated this crackme as awesome.

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Discussion and comments

stare himemy 17. Oct 2012	I have downloaded he crackme3.zip and unzipped it but when I click on it nothing happens. Can somene help me. Send me the info to stare.deo@gmail.com
Dark_Prince 17. Oct 2012	stare himemy, it is a console type app, open command prompt and type java -jar crackme3.jar "Serial key"
09iopiop 21. Oct 2012	What Dark Prince said is wonderful!It really solved the problem.
krankenversicherungsvergleiche 15. Aug 2013	For some reason my Java decompiler is giving me an error that it can't open it because it might be corrupt, etc.
warsaw Author 18. Aug 2013	kranken: I'd be very impressed if you could get a decompiler to work on this. Out of curiosity, which one did you try?
krankenversicherungsvergleiche 27. Aug 2013	I tried DJ Java Decompiler. I got some type of code trying out Java DeCompiler by Prabhu but it's kind of weird because it's not true Java code.
krankenversicherungsvergleiche 27. Aug 2013	What I see is like a combination between Java code and assembler.
krankenversicherungsvergleiche 27. Aug 2013	Correction: It's the Java bytecode I got. Sorry for the numerous comments.
krankenversicherungsvergleiche 28. Aug 2013	Seems that the number from the constant pool at #33 and the number that is called by ldc #33 are not the same when I disassembled it. It seems that the 9 is missing off the end... Does anybody else have this problem?
warsaw Author 29. Aug 2013	You're using a bad disassembler Anyway, if you don't know enough to figure out things like this, you should probably be trying one of my easier challenges instead. I don't think you'll be able to solve this one even with the right tools.
ReWolf 16. Feb 2014	Solved, solution submitted, meanwhile it can be read here http://blog.rewolf.pl/blog/?p=856
warsaw Author 16. Feb 2014	Congratulations. I'll do a writeup of the process behind creating the crackme when I have time.

warsaw's Sorting Server CTF

Download sortingserver.zip, 2 kb (password: crackmes.de)
Browse contents of sortingserver.zip

This is a server which is designed to sort numbers for people. However, it contains a subtle design flaw which allows recovery of the secret flag.

Your goal is to figure out a way to steal the flag by interacting with the server remotely.

Difficulty: 4 - Needs special knowledge
Platform: Multiplatform
Language: Python

Published: 20. Apr, 2013
Downloads: 189

Rating

Votes: 3
Crackme is quite bad.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

menessy 01. May 2013	would the author post the solution
warsaw Author 18. Aug 2013	Hint: It's not a timing attack. There's a much easier way to do it.
phueghy 19. Aug 2013	I can't even get it to start as it states an error: File "sortingserver.py", line 111 return {k:v[0] for k,v in params.items()} ^ SyntaxError: invalid syntax Am I using a wrong python version or is it not supposed to be run via "python sortingserver.py"?
warsaw Author 27. Aug 2013	You're probably using Python 2.6. You need 2.7
warsaw Author 27. Aug 2013	You'll also need to supply your own flag.txt of course
phueghy 04. Sep 2013	As you stated it isn't a timing attack so I am somewhat lost. The only interaction possible is via the sorting algorithm. It chooses the same pivots every time but as there is no other output than the sorted list, I have no idea as how to guess the seed of the pivot random number sequence.
warsaw Author 22. Oct 2013	Hint: Why is recursion problematic in Python?
syspher 27. May 2015	The goal is to get the message: Correct! ?
andrewl.us Moderator 27. May 2015	the goal is to access the server in such a way that the integer key (in flag.txt) is revealed, no matter what value it is example queries are given in the python comments your solution should contain the magic query and an explanation of how it was derived
Extreme Coders 29. May 2015	By providing a specially crafted input is possible to overflow the recursion but how this affects in revealing the key has yet to be explored. Note: I am not talking about inputting a insanely large a list of numbers ;)

water's UnpackMe by water

Download UnpackMe_by_water.zip, 125 kb (password: crackmes.de)
Browse contents of UnpackMe_by_water.zip

This application was packed using my own protector I wrote some time ago.

Your task is to unpack it and rebuild imports.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 25. Aug, 2016
Downloads: 101

Rating

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Solutions

Solution by acruel, published 20. oct, 2016; download (43 kb), password: crackmes.de or browse.

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Discussion and comments

SV Reverser 12. Sep, 13:32	is packed exe doing something ?
water Author 12. Sep, 16:18	Yup just enter two digits and you get result of adding and subtracting these numbers.
SV Reverser 14. Sep, 12:19	0040ED2B \| C7 44 24 04 2F 8F 40 00 \| mov dword ptr ss:[esp+4],unpackme_by_water.408F2F \| 004D0A73 \| 8D 85 7C FF FF FF \| lea eax,dword ptr ss:[ebp-84] \| 004D0A79 \| 89 44 24 08 \| mov dword ptr ss:[esp+8],eax \| 004D0A7D \| 8D 45 80 \| lea eax,dword ptr ss:[ebp-80] \| 004D0A80 \| 89 44 24 04 \| mov dword ptr ss:[esp+4],eax \| 004D0A84 \| 8D 85 6A FF FF FF \| lea eax,dword ptr ss:[ebp-96] \| 004D0A8A \| 89 04 24 \| mov dword ptr ss:[esp],eax \| [esp]:"%d%d" 004D0A8D \| 8B 45 BC \| mov eax,dword ptr ss:[ebp-44] \| [ebp-44]:scanf 004D0A90 \| FF D0 \| call eax \| 004D20D7 \| C7 44 24 04 CC 16 40 00 \| mov dword ptr ss:[esp+4],unpackme_by_water.4016CC \| 004F1630 \| C7 44 24 04 B0 16 40 00 \| mov dword ptr ss:[esp+4],unpackme_by_water.4016B0 \| 004F176F \| FF D0 \| call eax \| 00510000 \| 55 \| push ebp \| 00510001 \| 89 E5 \| mov ebp,esp \| 00510003 \| 8B 45 0C \| mov eax,dword ptr ss:[ebp+C] \| 00510006 \| 8B 55 08 \| mov edx,dword ptr ss:[ebp+8] \| 00510009 \| 01 D0 \| add eax,edx \| 0051000B \| 5D \| pop ebp \| 0051000C \| C3 \| ret \| 004F3C28 \| 89 04 24 \| mov dword ptr ss:[esp],eax \| [esp]:"a + b: %d\n" 004F3C2B \| 8B 85 50 FF FF FF \| mov eax,dword ptr ss:[ebp-B0] \| [ebp-B0]:printf 004F3C31 \| FF D0 \| call eax \| 004F529C \| C7 44 24 04 BD 16 40 00 \| mov dword ptr ss:[esp+4],unpackme_by_water.4016BD 004F541D \| FF D0 \| call eax \| 00530000 \| 55 \| push ebp \| 00530001 \| 89 E5 \| mov ebp,esp \| 00530003 \| 8B 45 0C \| mov eax,dword ptr ss:[ebp+C] \| 00530006 \| 8B 55 08 \| mov edx,dword ptr ss:[ebp+8] \| 00530009 \| 29 C2 \| sub edx,eax \| 0053000B \| 89 D0 \| mov eax,edx \| 0053000D \| 5D \| pop ebp \| 0053000E \| C3 \| ret \| 004F7835 \| 89 04 24 \| mov dword ptr ss:[esp],eax \| [esp]:"a - b: %d" 004F7838 \| 8B 85 0C FF FF FF \| mov eax,dword ptr ss:[ebp-F4] \| [ebp-F4]:printf 004F783E \| FF D0 \| call eax \| First step ...
acruel 16. Sep, 03:00	Just posted the unpacked program and a tutorial. Nice trick ;)

waynemodz's SmokeFX v1

Download smokefx.zip, 273 kb (password: crackmes.de)
Browse contents of smokefx.zip

Hello and Welcome!
to SmokeFX v1.0

This is my first attempt of creating a crackme/keygenme
so if it is easy, then expect a version 2!

Rules are simple!
Youve got to enter a username and serial key...
Crack the serial and click Unlock...
Your success or failure shall be displayed to you.

Once youre done with that...
or if you failed with that...
You can Crack it...
Get my messagebox to display the serial key.

Good Luck People.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 15. Nov, 2013
Downloads: 515

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by darkfilo, published 02. dec, 2013; download (864 b), password: crackmes.de or browse.

darkfilo has rated this crackme as nothing special.

Solution by MaxXor, published 02. dec, 2013; download (275 kb), password: crackmes.de or browse.

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Discussion and comments

karma.954full 16. Apr, 19:36	UserName: By KarMa [954] ©Full PassWord: 20133205000200000

waynemodz's SmokeFX v2

Download smokefx2.zip, 307 kb (password: crackmes.de)
Browse contents of smokefx2.zip

Hello All,
Welcome to my crackme SmokeFX 2!

Here we have a crackme that has 2 options,
1. keygen me ....
enter a username and key....click unlock!
quiet simple to solve as its the same from the previous version.
but this features an algorithm, so i would like to see a keygen for this app.

2. crack me. ive simplied this process, the crack me will retrieve an encrypted value and display it.
Your mission, encrypt your own message and replace it within the application without triggering the ALARM.
or alternatively display the serial via the crack button.

but becareful as the application checks for tampering.....
and debuggin.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 09. Dec, 2013
Downloads: 871

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Solutions

Solution by givses, published 02. jan, 2014; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

Flasche 14. Feb 2014	Well I suck I cant understand a single thing and its driving me crazy grrrrrrrrr
salut6968 19. Feb 2014	very very beautiful !
basscode 22. Feb 2014	Username : 1337 Password : 7999 Username : 13444 Password : 79555
Narwhal 11. Aug 2014	U : Narwhal S : m2c5o4s5m8g9s10
karma.954full 16. Apr, 19:33	UserName: By KarMa [954] ©Full PassWord: c4w3@o7f8l7t10i11@Q1111115Q13@13r15i13x15x

webmasta's crackme #3

Download webcrkme.zip, 35 kb (password: crackmes.de)
Browse contents of webcrkme.zip

find it! (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 01. May, 2000
Downloads: 1614

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Solutions

Solution by cytom!c, published 01. may, 2000; download (6 kb), password: crackmes.de or browse.

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webmasta's lsd v1

Download webby_lsd1.zip, 7 kb (password: crackmes.de)
Browse contents of webby_lsd1.zip

name/serial (vb6 native)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 12. Feb, 2001
Downloads: 1483

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Solutions

Solution by craxor, published 12. feb, 2001; download (3 kb), password: crackmes.de or browse.

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Solution by vorrtexx, published 12. feb, 2001; download (12 kb), password: crackmes.de or browse.

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webmasta's xtreme v2.0

Download xtreme2.zip, 43 kb (password: crackmes.de)
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name/serial, reg code, product code (vb)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: (Visual) Basic

Published: 24. Apr, 2000
Downloads: 1885

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Solutions

Solution by nh, published 24. apr, 2000; download (3 kb), password: crackmes.de or browse.

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weeman3005's CrackMe_1

Download CrackMe1.zip, 5 kb (password: crackmes.de)
Browse contents of CrackMe1.zip

Visual Studio 2008 Console

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 23. Dec, 2009
Downloads: 1816

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Solutions

Solution by sd333221, published 12. dec, 2009; download (297 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Silkut 11. Dec 2009	I guess the goal is to find a serial for the name ?
weeman3005 Author 11. Dec 2009	there is two goals find a serial for ur name or make a keygen
sd333221 12. Dec 2009	I enjoyed solving this after a long time of not solving crackmes
weeman3005 Author 13. Dec 2009	Great work on that keygen sd333221
Apelord 23. Dec 2009	i found a serial for my name, is that the correct goal?
weeman3005 Author 23. Dec 2009	kind of.. i just put find a serial for a goal for new crackers but only a keygen is a real solution
Deathptr 25. Dec 2009	hehe nice crackme. :) but it´s too late, it was solved last week, do you remember? ;) (Ref0rce= Deathptr +) greetings. ;)
karnaugh 11. Jun 2012	This was my first crackme, enjoyed it thoroughly! I'll post my solution / keygen after I finish my uni exams.
r2s2 10. Oct 2012	my first crackme. managed the algorithm quite fast, as I try learning assembler, writing the keygen in assembler took me a lot of time :-)

West's Crackme for Newbies

Download PASSWORD.zip, 244 b (password: crackmes.de)
Browse contents of PASSWORD.zip

You must find the correct password. If you are right, the program will deduce "ok".

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: C/C++

Published: 24. Aug, 2008
Downloads: 692

Rating

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Solutions

Solution by mrcool, published 26. mar, 2014; download (1 kb), password: crackmes.de or browse.

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Solution by Getlin, published 29. aug, 2008; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

Ed2a 07. Feb 2011	This is the first crackme that I've done while trying to learn asm and re. And I must say it was quite a challenge for a complete beginner, took me about 4 hours to figure it out. I compared it to Getlin's solution and it's exactly the same. It was fun. Thanks for writing this.
NewCracker 09. Feb 2011	it is nice easy CrackMe Many Greets To you man

wilse's artemis

Download wilse_artemis.zip, 36 kb (password: crackmes.de)
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find it...

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 20. Jun, 2000
Downloads: 1326

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Solutions

Solution by chiwaka, published 20. jun, 2000; download (2 kb), password: crackmes.de or browse.

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Solution by tscube, published 20. jun, 2000; download (19 kb), password: crackmes.de or browse.

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WinFan's BruteForceMe #1

Download BFMe1.zip, 24 kb (password: crackmes.de)
Browse contents of BFMe1.zip

Platform: Microsoft Windows
Language: Borland Delphi 6
Difficulty 1 - For Newbies

Aims:
1 - Unpack the CrackMe (Manual Unpacking only; No Generic PE Unpackers)
2 - Find out how the password check works
3 - Write a bruteforcer and crack the password

Hint: The BruteForcer only has to check the chars a-z, LowerCase only...
There may be more than one password, i have already found 2 ;-) But the first one the bruteforcer finds will be the right one

MODERATOR NOTE: difficulty -> 2

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 29. Jul, 2009
Downloads: 592

Rating

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Solutions

Solution by obnoxious, published 03. aug, 2009; download (30 kb), password: crackmes.de or browse.

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Solution by Vallani, published 03. aug, 2009; download (243 kb), password: crackmes.de or browse.

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Solution by DoomsDay, published 03. aug, 2009; download (28 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

WinFan Author 29. Jul 2009	Please don't forget to include the unpacked exe, the source code of the BruteForcer and a compiled version of your BruteForcer in the solutions!
WinFan Author 04. Aug 2009	Nice solutions everyone, have some peanuts ;)
Anton Troskie 09. Aug 2009	Hey guys , I know this is wierd but I have no Idea how this brute forcers work , how they are written for that specific program . Do they read a certain adress untill a certian jump is made or how does it work?
WinFan Author 09. Aug 2009	This crackme uses an hash algorithm. As you can see in the solutions, you should start reversing this algorithm. After that, you use that algo in your bruteforcer until you find a match. (Where the hashed bruteforced string = hash you got from asm)

WinFan's CrackMe#4

Download Crackme#4.zip, 9 kb (password: crackmes.de)
Browse contents of Crackme#4.zip

This CrackMe is very simple, just analyze the code to find the right password.

Rules:

~ No patching
~ No bruteforcing

Have Fun!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 05. Jan, 2009
Downloads: 975

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by givses, published 01. jul, 2014; download (11 kb), password: crackmes.de or browse.

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Solution by main, published 17. jan, 2009; download (1677 kb), password: crackmes.de or browse.

main has rated this crackme as nothing special.

Solution by Peroxaide, published 17. jan, 2009; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

Peroxaide 07. Jan 2009	Submitted First Solution >>
WinFan Author 07. Jan 2009	Good Job :) I'm currently playing around with .NET .. Maybe i will make a crackme with c# ..
main 07. Jan 2009	Video solution on the way...
souravipc53 10. Jan 2009	and one thing winfan, you have left a big clue by leaving words like'x','u'etc..
WinFan Author 10. Jan 2009	As I said, it's a very simple crackme for beginners ..
Redeam 31. Jan 2009	just asking... does any 1 have like a cheat sheet of what some of the coding means or what to look out for... im new to this give me a break

WinFan's CrackMe #2

Download crackme#2.zip, 11 kb (password: crackmes.de)
Browse contents of crackme#2.zip

My second CrackMe :-)

Platform: Windows
Language: Borland Delphi 6

Your task is to find the password, which lets you see the "correct" message! In your solution you should describe how the program checks for the right password.

Rules:
no bruteforcing
no patching

Once you see what's going on, it should be easy!

Have fun!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 22. Jun, 2008
Downloads: 387

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Solutions

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Discussion and comments

DigitalAcid 24. Jun 2008	All you need, is some grey matter ;).
WinFan Author 24. Jun 2008	It's quite simple, yes.
obnoxious 27. Jun 2008	i aint good with delphi but as digital acid has pointed out all it requires is some grey matter......:)
WinFan Author 27. Jun 2008	You don't have to be good at delphi for this one! ;)
costy 27. Jun 2008	I founded the solution but i didn't understand the code i just tried a lot of times and ... my brain is on fire
WinFan Author 27. Jun 2008	You have to explain how it works :)
costy 29. Jun 2008	I haven't explained the solution becouse I need 2 brains to solve this
Zaphod 01. Jul 2008	I found the solution, too - but unfortunately just by trial and error. I cannot follow the code :(
br0ken 09. Jul 2008	I patched stage 1 and found a valid name/serial combination for stage 2. However, a keygen might prove difficult. Selfkeygen is valid?
TiGa 10. Jul 2008	As it is written in the crackme's description: Your task is to find the password, which lets you see the "correct" message! In your solution you should describe how the program checks for the right password. A self-bruteforcer or self-keygen doesn't explain much.
costy 26. Jul 2008	@moderators I don't understand the algo in the debugger but I understand perfectly how the program works. I made a program that decript the message in the same way. I can explain exactly how the message is generated and i fouded the valid key. But I cannot comment the code that i can see in olly. Is this a valid solution?? I don't understand the code but I understood the program by trial and error!!
TiGa 27. Jul 2008	Do your best and I'll give it a fair look.
costy 27. Jul 2008	I will try to understand a bit about the code.
DigitalAcid 27. Jul 2008	I don't really see what the code is doing either, but i know for 85% how to get the valid serial. It's really easy actually. Little example: 1 + 4 = 5 So to find 1(the solution), you need to do 5 - 4. Maybe i said too much with this.
WinFan Author 28. Jul 2008	Look at the strings in Olly. The first 4 letters of the password is the first part of an language used in the program.
WinFan Author 09. Aug 2009	Wow, no solution for this one yet? Almost a year ago ...

WinFan's KeyFileMe "SPaCE" by WinFan

Download KeyFileMe.zip, 207 kb (password: crackmes.de)
Browse contents of KeyFileMe.zip

Difficulty: 3 - Getting harder
Language: Borland Delphi
Platform: MS Windows

In this KeyFileMe, your task is to write a generator for the licensefile. I have already included one valid
license.dat for the name "WinFan".

There is a little AntiDebug trick, which can be avoided without patching, but if you want to, patching is allowed.

Rules:
-No Bruteforcing ^^
-Write a KeyFile Generator
-Explain what you've done

Of course, the source of the Generator must be included in the solution (I don't care what language you use)

Good luck!

note: Some AV's detect a virus / malware in this file. This can be ignored, theres no virus inside ;) And yes, the file is quite big..

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 24. Jan, 2009
Downloads: 561

Rating

Votes: 6
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by freesoul, published 30. jan, 2009; download (404 kb), password: crackmes.de or browse.

freesoul has rated this crackme as boring.

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Discussion and comments

shellwolf 26. Jan 2009	S:8281 lic.dat =0x53(space) 0xa0 0x3A(space) 0xa0 0x38(space) 0xa0 0x32(space) 0xa0 0x38(space) 0xa0 0x31(space) 0xa0
simonzack Moderator 27. Jan 2009	long physical algo, short actual algo please, can you guys just programm in c++ if the actual algo is incredibly short, saves lots of time converting delphi code
simonzack Moderator 27. Jan 2009	btw possible to be smaller than 162 bytes?
WinFan Author 27. Jan 2009	Sorry, I don't like C++ very much ;) Are you talking about the size of the KeyFile? Yes, it can be smaller than 162 bytes
PeterPunk 28. Jan 2009	Curious crackme. You can even create the "KeyFile Generator" with just a little studying the license.dat And I also think that the smallest size is 162 bytes.
simonzack Moderator 28. Jan 2009	@winfan: actually, I use javascript mostly for keygens just out of convenience, however, I wouldn't mind cracking a slightly harder program in delphi, so at least the time is worth it :) @peterpunk: lol, never should've analysed the crackme itself then x.x
WinFan Author 28. Jan 2009	smallest license file can be 59 bytes
simonzack Moderator 28. Jan 2009	whoa guess I'll try it again tomorrow
WinFan Author 28. Jan 2009	I managed to make it 58 bytes ;)
freesoul 28. Jan 2009	I think it shouldn't be lvl 3... It might be lower... :)
simonzack Moderator 29. Jan 2009	of course! 58 bytes I never ever knew two strings with 0 length can be compared... and the result is ... unbelievable
WinFan Author 29. Jan 2009	Yes :/ I forgot to add a length check for the name .. That's why it is possible
Redeam 31. Jan 2009	lol wheres the n00b section cuz im lost XP

WinFan's KeyGenMe#1

Download keygenme#1.zip, 65 kb (password: crackmes.de)
Browse contents of keygenme#1.zip

Your task is to reverse the serial algo and write a keygen! (Keygen can be written in any language you want)

Input is case sensitive!

Language: Borland Delphi 6 (Console)
OS: Windows (tested on XP, should work on others)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 07. Jun, 2008
Downloads: 555

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by Bswap, published 16. jun, 2008; download (398 kb), password: crackmes.de or browse.

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Discussion and comments

navossoc 09. Jun 2008	"Keygen can be written in any language you want" It may be the program itself? Uploaded a solution. []'s
WinFan Author 09. Jun 2008	If you explain in your solution how the algo works, yes! ("Your task is to reverse the serial algo...")
simonzack Moderator 10. Jun 2008	the algo seems quite complicated, and real long
gamma95 10. Jun 2008	serial fishing so easy
WinFan Author 10. Jun 2008	Fishing yes, but understanding the algo may be harder!
WinFan Author 16. Jun 2008	Nice solution, bswap!
Bswap 16. Jun 2008	thx...... Have a lot more in mind......

WinFan's NAVM 2 - Not another Virtual Machine

Download NAVM2.zip, 39 kb (password: crackmes.de)
Browse contents of NAVM2.zip

Platform: Microsoft Windows (tested on Windows 7 - 32 bit)
Language: CodeGear Delphi 2009
Difficulty: 4

This crackme is running entirely from the included VM. To start the crackme,
enter "program.navm" when asked for a file name.

Goals:
- Describe what exactly the VM is doing
- Patch the included program.navm (it must accept any serial)
- KeyGen (MUST BE A .NAVM FILE)

Rules:
- No EXE-Patching

Note: The keygen for the solution must run inside the NAVMCrackme2 Interpreter. You have to
create a new .navm file and enter its name on startup.

Have fun :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 28. Sep, 2010
Downloads: 319

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by |sas0|, published 12. apr, 2012; download (32 kb), password: crackmes.de or browse.

|sas0| has not rated this crackme yet.

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Discussion and comments

WinFan Author 06. Oct 2010	Anyone trying this one yet?
WinFan Author 23. Feb 2012	More than one year has passed ....... :-) Anyone?
CrackMyAss 25. Aug 2013	HaHa, another year passed

WinFan's NAVM - Not another Virtual Machine

Download NAVM.zip, 16 kb (password: crackmes.de)
Browse contents of NAVM.zip

Platform: Microsoft Windows (tested on Windows 7 - 32 bit)
Language: CodeGear Delphi 2009
Difficulty: 3 (I think so ...)

A simple VM is used to verify serials. The algorithm is extra easy, as this CrackMe focuses on analyzing the VM-Code.

Goals:
- Explain whats going on in the VM-Code
- Write a KeyGen which generates random serials
- Patch the .navm file to make every serial valid (NO EXE-PATCHING)

Have fun :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 17. Sep, 2010
Downloads: 351

Rating

Votes: 3
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by Voik, published 21. sep, 2010; download (14 kb), password: crackmes.de or browse.

Voik has rated this crackme as awesome.

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Discussion and comments

Voik 17. Sep 2010	Very nice crackme! I will try it! :)
Voik 18. Sep 2010	Patched .navm file: 00 D1 40 00 Tutorial soon. :)
WinFan Author 18. Sep 2010	Well done, now write a KeyGen (shouldn't be much of a problem), explain what the VM is doing and the solution is perfect! :)
Voik 19. Sep 2010	Tutorial submited with keygen and patched .navm. :)
WinFan Author 19. Sep 2010	Cool, I am already working on my next NAVM crackme, which will be a little more complex. I have written a simple assembler language so writing .navm files should be a lot faster for me. :) I am also thinking about expanding the operands size to 32 or even 64-bit.
vptrlx 19. Sep 2010	The mankind doesn't need another assembler… Don't you think about writing something more useful like a disassembler or even a debugger? Think "about expanding the operands size to ... even 64-bit" in that way ;)
WinFan Author 19. Sep 2010	I was talking about a tool that makes me able to create code for my own VM more quickly. This has nothing to do with assembler code for intel-compatible CPU's.
vptrlx 19. Sep 2010	i understand:) And your development is (if you are going to do everything seriously) is as hard as the things i describe, but it's Sisyphean toil. Yeah, let's abort this discussion :)
WinFan Author 19. Sep 2010	I am doing all of this just for fun and to educate myself :-)
WinFan Author 21. Sep 2010	Nice solution Voik, good job!
BoRoV 21. Sep 2010	@WinFan: wait your new and powerful navm, 8-bit vm not interesting
WinFan Author 21. Sep 2010	I have already rewritten the VM to support 32-bit operands, so most likely the next crackme will have a proper serial-Algorithm. (This one was .. lame ;-) )

WinFan's NETCrackMe#1

Download netcme.zip, 512 kb (password: crackmes.de)
Browse contents of netcme.zip

WinFan's NETCrackMe#1

Difficulty : 2
Platform : Windows
Language : .NET (C# and Delphi Prism)

Write a keygen ;-) Everything allowed, except for self-keygen!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: .NET

Published: 03. Aug, 2009
Downloads: 682

Rating

Votes: 5
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by deurus, published 13. aug, 2009; download (155 kb), password: crackmes.de or browse.

deurus has rated this crackme as nothing special.

Solution by darkscout, published 13. aug, 2009; download (1861 kb), password: crackmes.de or browse.

darkscout has not rated this crackme yet.

Solution by Vallani, published 13. aug, 2009; download (714 kb), password: crackmes.de or browse.

Vallani has rated this crackme as nothing special.

Solution by yulyul2003, published 13. aug, 2009; download (728 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

WinFan Author 14. Aug 2009	Nice solutions everyone :-) WinFan
deurus 04. Feb, 22:39	Videotutorial: https://www.youtube.com/watch?v=b9-GdmIQINQ&index=7&list=PL6mApIrwvMthNYqiL8bjCc2oOlQ-yUHeY

WinFan's NoRule #1

Download NoRule1.zip, 254 kb (password: crackmes.de)
Browse contents of NoRule1.zip

Platform: Microsoft Windows
Language: CodeGear Delphi 2009
Difficulty: 2

This crackMe has no rules, you can do whatever you want. The only aim is to show the goodboy message!

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Borland Delphi

Published: 13. Aug, 2009
Downloads: 480

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by deurus, published 28. aug, 2009; download (337 kb), password: crackmes.de or browse.

deurus has rated this crackme as boring.

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Discussion and comments

mouradpr/at4re 13. Aug 2009	verry easy to Rebuild Congratulation Message :D ========= Old Idea
WinFan Author 14. Aug 2009	@mouradpr: rebuild? I hope you didn't write your own congratz message ;) You should just make the program execute the original goodboy code!
deurus 28. Aug 2009	A ResourceHacker solution sended; it's alternative but is a solution
WinFan Author 28. Aug 2009	Hey deurus, your solution is quite different than mine, but well done :)

WinFan's WinFans CrackMe#1

Download crackme.zip, 27 kb (password: crackmes.de)
Browse contents of crackme.zip

This is my first crackme, it's quite easy.

The solution must include the correct password, and a keygen! Everything is allowed!

Language: Borland Delphi 6
Platform: Windows (only tested on XP, should work on others)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 03. Jun, 2008
Downloads: 922

Rating

Votes: 6
Crackme is boring.

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Solutions

Solution by 0x69, published 15. may, 2009; download (29 kb), password: crackmes.de or browse.

0x69 has rated this crackme as boring crap.

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Discussion and comments

WinFan Author 03. Jun 2008	Sorry, the solution must not include the valid password, but a patched Executable!
obnoxious 04. Jun 2008	solution is ready will post it soon
WinFan Author 04. Jun 2008	Nice, will look through the solution soon!
Bswap 11. Jun 2008	I have tried to find a correct serial for this Crackme but I can tell you it does not exist… A patch is an easy job.
WinFan Author 11. Jun 2008	The password has to be patched. At the secondlevel you have to enter a serial, and there are correct serials!
Zaphod 12. Jun 2008	WinFan, what do you mean when you say "The password has to be patched."? I had to make a patch when I looked at the crackme in Olly, but when I run the crackme outside Olly, I can just type a password ( one of many possible ), and thereafter I type my name and the serial - and get a congratulation.
WinFan Author 12. Jun 2008	The password has to be patched, but you mustn't patch the serial / name, write a keygen!
Zaphod 12. Jun 2008	I hope I'm not revealing too much: The first char of the password can be anything, is this first char what you mean by patching the password ?
WinFan Author 12. Jun 2008	No, you have to patch the whole stage 1 :)
Zaphod 12. Jun 2008	I'll write a private message showing what I did...
Kalippan 28. Jun 2008	i have patched the entire stage 1.. now what??
WinFan Author 28. Jun 2008	Write a keygen for stage 2
0x69 15. May 2009	I`ve submited my solution and now I`m waiting anxiously for moderators review :-) In general this crackme was very cool. Especially it`s traps :-)
0x69 02. Jul 2009	Sorry, I unintentionally marked this crackme as boring crap. It was a mis-click. Oops :-( Actually this crackme was very very cool. Keep it up WinFan !!!

WinFan's WinFan's third Crackme (Trainer)

Download crackme#3.zip, 238 kb (password: crackmes.de)
Browse contents of crackme#3.zip

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

In this CrackMe, you need to enter a random code. You can only Enter "X" or "O". The length of the code is 16.
Once you enter the right code, you will get the "Correct!" message.

Your task is to write a trainer which gives the right code to you. The solution must include the source code
of your trainer!

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 07. Aug, 2008
Downloads: 469

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by _Ra_, published 12. aug, 2008; download (30 kb), password: crackmes.de or browse.

_Ra_ has not rated this crackme yet.

Solution by [xorolc], published 12. aug, 2008; download (5 kb), password: crackmes.de or browse.

[xorolc] has rated this crackme as boring.

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View profile of WinFan »

Discussion and comments

CoMbAiNa_T 09. Aug 2008	Hi, Great CrackMe, I have managed to solve this little boy, and now I just have to write the trainer to finish the task. Again, great work, it was very interesting. :)
_Ra_ 09. Aug 2008	I too managed to solve the crackme! Agree, it was very interesting. :)
CoMbAiNa_T 09. Aug 2008	I just can't create the trainer.. Ahhhh I think I don't use the ReadProcessMemory function the right way or something, because I keep getting no value in my buffer. It would be nice to get some help with this thing...
_Ra_ 10. Aug 2008	@CoMbAiNa_T You could try to see if the APIs you use throw any errors. Can you tell what parameters did you pass to ReadProcessMemory?
WinFan Author 10. Aug 2008	What language are you using for the trainer?

WinFan's WinFan's TrainerMe

Download trainerMe.zip, 220 kb (password: crackmes.de)
Browse contents of trainerMe.zip

After you start this CrackMe, you have 120 seconds until it closes. You are allowed to load into any debugger and pause the application (NO PATCHING).
Your task is to write a trainer which sets the seconds left to a user defined value.

Have fun! ;-)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 23. Jul, 2009
Downloads: 547

Rating

Votes: 3
Crackme is boring.

Rate this crackme:

Solutions

Solution by Adminka, published 28. jul, 2009; download (5 kb), password: crackmes.de or browse.

Adminka has rated this crackme as nothing special.

Solution by DoomsDay, published 28. jul, 2009; download (278 kb), password: crackmes.de or browse.

DoomsDay has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

EvOlUtIoN 25. Jul 2009	what is the meaning of trainer indeed?
WinFan Author 25. Jul 2009	http://en.wikipedia.org/wiki/Cheating_(video_games)#Trainers Basically, it's a program which changes addresses or code in other applications while they are running. This is often used by gamers to manipulate games. You can look in the solutions of my other TrainerMe which i wrote some time ago.
A3PIK 25. Jul 2009	Good Crackme , That's very Difficult , because I'm beginner !! Help me To Solve it Tnx brO
IMPosTOR 26. Jul 2009	Its very easy to make patch,loader,Trainers and change timer value, dec,inc , ... to moderator : level = 3 ??? 0044E48F 4A DEC EDX
WinFan Author 26. Jul 2009	Sorry, but that's not really what you had to do. A valid solution is a program that changes the amount of time left while the application is running. Replacing DEC EDX by NOP will just stop the countdown.
IMPosTOR 27. Jul 2009	ya you rigth. each time you run the application address changed in memory. and we can find correct address here.just some sniffer. 0044E1D3 \|. 8B3490 MOV ESI,DWORD PTR DS:[EAX+EDX4] ; eax+edi4 Get edi value * 4 + eax = correct value. chang it to other value. and its not so simple i think Difficulty is correct. ;)
WinFan Author 27. Jul 2009	Hehe, and address not just changes every time you run it, but also every second, when the timer changes the value ;-)
IMPosTOR 27. Jul 2009	hehe , so i can nop your function and set my function to set timer. i think it's allow.
Adminka 27. Jul 2009	To IMPosTOR: It's simplier. No need to set timer by yourself. It has a count.
SaintDogbert 28. Jul 2009	Question.. can the trainer load WinFan itself or must it also be able to function if it is executed after WinFan?
WinFan Author 28. Jul 2009	It should work if its executed after the target. Of course, if the way you manipulate it is the same, you can also have it loaded youself.
WinFan Author 28. Jul 2009	Well done, nice solutions!

winnie's first winnie's crackme

Download firsr_by_winnie.zip, 27 kb (password: crackmes.de)
Browse contents of firsr_by_winnie.zip

Crack or keygen it, as you prefare, but better to keygen.

P.S. Writen on VC++8.0

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 08. Jul, 2008
Downloads: 297

Rating

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Solutions

Solution by ORacLE_nJ, published 21. feb, 2011; download (28 kb), password: crackmes.de or browse.

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Discussion and comments

Bispoo 09. Jul 2008	Solved, will not write a solution cause they never get accepted, i guess i dont have much talent to explain my stuff :(, wrote a keygen for this too.
simonzack Moderator 10. Jul 2008	lol, the key was in front of my eyes and i didn't see it @Bispoo: wow, u solve crackmes fast, looks like only took u <3 mins :p
kaiZer-by 10. Jul 2008	winnie: it is a nice and easy keygenme, checking the length of serial isn't standard :) easy to find serial.. p.s.: don't use russian words in messageboxes.. many people can't understand it :)
hound 10. Jul 2008	Not bad at all. A bit of fun definitely :). Will write up a solution as its not very long.
winnie Author 11. Jul 2008	kaiZer-by: :-[ I'v forgot about message boxes, rememberd next day after uploaded it. God that Error icon appears when wrong key inputed)

Winundlin13's CrackMeAndGetKeyByWINUNDLIN13

Download CrackMeAndGetKey.zip, 20 kb (password: crackmes.de)
Browse contents of CrackMeAndGetKey.zip

Hey guys,
try to get the pass AND crack it :D

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 14. Aug, 2013
Downloads: 1028

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by givses, published 03. sep, 2013; download (10 kb), password: crackmes.de or browse.

givses has rated this crackme as boring.

Solution by Gunther, published 03. sep, 2013; download (1 kb), password: crackmes.de or browse.

Gunther has not rated this crackme yet.

Solution by stlcoder, published 15. aug, 2013; download (69 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

seVeb 23. Aug 2013	I don't get it why ther's the char array's length added to the minute in your solution @ stlcoder, can someone explain that to me? All i can see is machinename + machinename[0] + current minute + clipboard text
givses 01. Sep 2013	A simple thing to do is to clear the clipboard contents before entering the serial into the keygenme.
givses 01. Sep 2013	@seVeb 1. Empty the clipboard. 2. Get machine name 3. Get current minute 4. Translate the first character of the computer name into ASCII corespondent 5. Concatenate comp. name+ascii of the first char of the comp. name+minute 6. Input manual the result into the keygen 7. If the minute has changed the serial is changed too
zhc_ykt 21. Oct 2013	Used reflector + reflexil to print variable with pass instead of "Wrong pass, try again".
Salmiery 24. Oct 2013	Used JustDecompile and had it print "name".. realized it was using clipboard as part of pass, copied a single a, ran my "Keygen" and typed in the password.
sraboy 05. Dec 2013	To get the pass: Used Telerik JustDecompile (trial version) with the Reflexil plugin (automatic install/download/CrackMeAndGetKey.zip from within the app) to open the assembly. I also had to choose to load assemblies from the menu to give me access to System.Windows.Forms.MessageBox. I used the instruction editor (http://www.codeproject.com/Articles/20565/Assembly-Manipulation-and-C-VB-NET-Code-Injection) to add a simple call to MessageBox right after the "name" variable was loaded onto the stack but before the "0" used in the Compare() operation was loaded. A MessageBox displayed showing me the password. To crack: Reloaded the original executable and in the same function used the instruction editor to update the (50)NOP to (44)NOP and changed the string in that message box.
noone2407 28. Jan 2014	Use Reflexi go to instruction 47 of Button1_Click Edit ldnull into ldloc.0 Then we will see the key in the messagebox title
LetsGamePlayHD 25. Aug 2014	Nice CrackMe :D

WiteG's (Chili) CrackMe 11 by WiteG

Download witeg11.zip, 14 kb (password: crackmes.de)
Browse contents of witeg11.zip

Something nice i hope. All written in pure x86 assembly, no 3rd party code. All you have to do is to write a valid keygenerator for this program. This time it shouldnt be too easy. Have fun.

PS. this crackme was cracked already by jB ;]

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: Assembler

Published: 03. Apr, 2006
Downloads: 750

Rating

Votes: 5
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by artif, published 13. jul, 2008; download (274 kb), password: crackmes.de or browse.

artif has rated this crackme as awesome.

Discussion and comments

artif 13. Jul 2008	very nice! i really enjoyed it ;)
andrewl.us Moderator 14. Jul 2008	Nice tutorial artif! It's cool seeing these crackmes get solved that had been dormant for so long. And I'm jealous of your math knowledge :)
BeatriX 14. Jul 2008	yes, thanks a lot for this solution ! you have done a very interesting article.

WiteG's CrackMe 10 by WiteG

Download witeg10.zip, 38 kb (password: crackmes.de)
Browse contents of witeg10.zip

After 3 years im back with my 10th crackme. All you have to do is to write a valid keygenerator for this program. It shouldnt be too hard. Have fun.
Source code is included.

PS. this crackme was cracked already by jB ;]

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: C/C++

Published: 03. Apr, 2006
Downloads: 739

Rating

Votes: 4
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by andrewl.us, published 04. may, 2009; download (60 kb), password: crackmes.de or browse.

andrewl.us has rated this crackme as awesome.

Discussion and comments

Numernia Moderator 05. May 2009	Very nice solution andrewl, good job!
andrewl.us Moderator 05. May 2009	Thanks man.

WiteG's Crackme 1 by WiteG

Download witeg1.zip, 6 kb (password: crackmes.de)
Browse contents of witeg1.zip

Name / Serial / MMX

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 05. Aug, 2003
Downloads: 2602

Rating

Votes: 4
Crackme is quite nice.

Rate this crackme:

Solutions

Solutions

Solution by tomkol, published 10. feb, 2012; download (16 kb), password: crackmes.de or browse.

tomkol has rated this crackme as awesome.

Solution by elfz, published 02. jan, 2004; download (28 kb), password: crackmes.de or browse.

elfz has rated this crackme as awesome.

Discussion and comments

WiteG's Crackme 5 by WiteG

Download witeg5.zip, 15 kb (password: crackmes.de)
Browse contents of witeg5.zip

Name/SN, _nearly_ uncrackable

Difficulty: 8 - *VERY VERY* hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 05. Aug, 2003
Downloads: 2267

Rating

Waiting for at least 3 votes
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Solution by tomkol, published 13. sep, 2015; download (33 kb), password: crackmes.de or browse.

tomkol has rated this crackme as awesome.

Solution by Numernia, published 08. feb, 2010; download (89 kb), password: crackmes.de or browse.

Numernia has not rated this crackme yet.

Send a message to Wizzardz »

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Discussion and comments

mcourteaux 20. Feb 2010	You are fantastic, Numernia... (!)
andrewl.us Moderator 20. Feb 2010	:) :) are the remaining WiteG's safe for long?
jB_ 23. Feb 2010	All the WiteG crackmes are solved for a long time. ged_/TKM! provided a solution for Crackme 8, but his site is down. The only one that is still unsolved, and will not be solved in a near future, is the one with a big RSA.

Download KeyGenMe_1.zip, 17 kb (password: crackmes.de)
Browse contents of KeyGenMe_1.zip

This KeyGenMe#1 is a windows dll.

There is 1 export to this dll, used for validation, it takes two strings, one is used as input for the algorithm the second as a string in the format 123-456-789-123

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 20. Jun, 2006
Downloads: 788

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by cyclops, published 06. jul, 2006; download (48 kb), password: crackmes.de or browse.

cyclops has rated this crackme as nothing special.

Send a message to Wooglepie »

View profile of Wooglepie »

Discussion and comments

TQN 20. Jun 2006	As I see, the VerifyInfo take 3 parameters, user name, use email and user serial. The prototype of this function can be: BOOL __stdcall VerifyInfo(LPCSTR lpszName,LPCSTR lpszMail,LPCSTR lpszSerial); This is a easy crackme.
DrGonzo 22. Jun 2006	Do we have to write a program which uses the dll at our own?
TQN 01. Jul 2006	I solved this crackme, but I am lazy to write tutor. The keygen and source at: http://rapidshare.de/files/24649665/KeyGen.rar.html Regards,

Wooglepie's Wooglepies' accessme 1

Download accessme.zip, 6 kb (password: crackmes.de)
Browse contents of accessme.zip

In order to crack this one you'll have to find the correct
username/passwords to an account. Patching in order to make it
display a successful login session is NOT allowed.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 25. May, 2010
Downloads: 1348

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by strobostro, published 01. jun, 2010; download (404 b), password: crackmes.de or browse.

strobostro has not rated this crackme yet.

Solution by Xspider, published 01. jun, 2010; download (2 kb), password: crackmes.de or browse.

Xspider has rated this crackme as boring crap.

The submission of solutions is closed.

Discussion and comments

marac112 26. May 2010	weeee found username and password on my own for the 1st time wasnt so hard
Lacey 30. May 2010	Nice. That one was easy.
pawlos 09. Jul 2010	Too easy :). It should be in a super easy category.
Artificial Mind 10. Jul 2010	seems that win7 x64 does not work
madmaurice 11. Jul 2010	i agree with pawlos. tooo easy ;)
EdwardBlack 20. Oct 2013	i found three usernames and passwords, but the login does not work with them ?!

wt0vremr's DBP 1.0 keygenme

Download dbp.zip, 25 kb (password: crackmes.de)
Browse contents of dbp.zip

[stupid stuff]
Dear customer! Allow me to itroduce the most genial benchmark in the world - Dummy Benchmark Pro 1.0 Super Mega Enterprise XP! Main features:
- Multithread Pi counting with Monte Carlo algorythm.
- Uuuhh.... That's all.
[/stupid stuff]

If talking serious, you have to write a keygen for this crackme. If you have a valid serial, you are able to start benchmark.

All this should work good on XP, and se7en, not sure about other OS.

Rules:
- No patching
- Code a keygen
- Self-keygening is NOT allowed
- Submit solution to crackmes.de

Feel free to mail me: wt0vremr[commercial at]gmail[littlenicedot]com

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 27. Feb, 2012
Downloads: 283

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by juza, published 03. mar, 2012; download (6143 kb), password: crackmes.de or browse.

juza has rated this crackme as nothing special.

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Discussion and comments

CrackMax 28. Feb 2012	dare you d0ping
CrackMax 28. Feb 2012	i mean damn you
redoC 29. Feb 2012	I briefly look at it and I think it's more then level 2
d0ping 29. Feb 2012	registration scheme takes into account only the first character of the name and its length, so for crackmes and c*******, the same serial: add6ff41b is correct. >>I briefly look at it and I think it's more then level 2 the algorithm is straight enough to classify it as crackme of level 1.5 - 2.

wt0vremr's Musical Crackme

Download MusicalCrackme.zip, 75 kb (password: crackmes.de)
Browse contents of MusicalCrackme.zip

============================
Musical Crackme by wt0vremr
============================
[In case of good ID\Serial the music starts]
============================
Difficulty:
- Very Very Easy
============================
Objective:
- Find a valid ID/Serial
- Make a keygen
- Write a tutorial
============================
Rules:
- No patchng
- No debugging
============================

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 08. Feb, 2012
Downloads: 1396

Rating

Votes: 8
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by cr4ckpaper, published 27. feb, 2012; download (2 kb), password: crackmes.de or browse.

cr4ckpaper has rated this crackme as boring.

Solution by Xartrick, published 10. feb, 2012; download (1 kb), password: crackmes.de or browse.

Xartrick has rated this crackme as nothing special.

Solution by negux, published 10. feb, 2012; download (5 kb), password: crackmes.de or browse.

negux has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

negux 08. Feb 2012	I sent my solution, i dont understand what did you mean whit no debuggin, i solve whit olly thats ok?? :)
Xartrick 08. Feb 2012	Solution sent: static analyze.
wt0vremr Author 09. Feb 2012	negux, depends on what you exactly did.
negux 09. Feb 2012	I find the instructions that generate the serial, and I programmed a little keygen, no patching
lheer 10. Feb 2012	thanks.wt0vremr i find id/serial. 570/932* I don't understand 'No debugging'
Spl3en 10. Feb 2012	'No debugging' = 'Don't modify the binary' ? Funny music ! :)
DimitarSerg 10. Feb 2012	Thanks for keygenme. My source http://pastebin.com/hDCRpWWS
agnsaft 12. Feb 2012	This one is easy, but also really funny. Thanks for the Crackme!
loneferret 13. Feb 2012	I enjoyed it... didnt make a keygen or anything. Piece of paper and calculator was as far as I went.
cr4ckpaper 15. Feb 2012	Good challenge, a bit too easy, but none the less was a good welcome back to crackmes.
fungsclup 19. Feb 2012	can someone record a video?
needhash 25. Feb 2012	thanks, wt0vremr)
sys_cc 01. Mar 2012	y=6x+5903； it is very easy
wt0vremr Author 01. Mar 2012	I do not understand it, really. When I say "Very Very Easy" in the description, each is committed to repeat it in comments :) What for? :)
wellwet 01. Mar 2012	I solved it (e.g. 1/5909) but one thing I don't understand why is in function which generates serial add edx, 3 .... imul ebx, edx. Why edx equals 0? Where is in code it set?
KryDos 01. Mar 2012	Thanks. Solution (Perl) http://pastebin.com/WDKVxxCt
wt0vremr Author 02. Mar 2012	KryDos, comments is not the place for solutions, read the FAQ.
Kostya 18. Apr 2012	For those who don't understand why EDX = 0 after GetDlgItemInt. For this case when we call GetDlgItemInt it successfully translates TEXT from editbox to INT, we will get lpTranslated paramater in EDX which is NULL (because it doesn't care about translation errors). And if error happens it will return last int of translated char in EDX and EAX = 0. There is only one error that can happen it is overflow in Serial editbox. Since the max number of ID is 9999 we won't get overflow in Serial and EDX will allways be zero for correct Serial; btw, we can enter any count of leading zeros, because StrToInt("0001") = 1;
Icebeen 06. Sep 2012	As my first very first crack, I'd say this is a great beginner's start.
dckjns 26. Jan 2013	Very beginner friendly Assumed EDX to be 0 though and had to go look it up in a debugger
seVeb 23. Jun 2013	Thank you very much for making this crackme! This was actually my first i was able to keygen :)

wt0vremr's wt0vremr's #1

Download Crackme1.zip, 15 kb (password: crackmes.de)
Browse contents of Crackme1.zip

Find a valid serial and write a keygen. That's very easy.
It is meant to be your first delphi crackme. If you haven't cracked delphi crackmes yet - start with this one.

Finding a serial takes a minute. It's very easy.
Making keygen requires some more brainz :)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 28. Apr, 2011
Downloads: 847

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by givses, published 06. oct, 2013; download (12 kb), password: crackmes.de or browse.

givses has rated this crackme as nothing special.

Solution by darkoman, published 08. feb, 2012; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

idid231 28. Apr 2011	I don't think make a Keygen need more brainz, it's as easy as fishing key :)
wt0vremr Author 28. Apr 2011	Well, if you think so - write a solution :)
BondCracked 29. Apr 2011	Please, recompile your project. It lacks rtl70.bpl and I do not have that version of Delphi installed here. Change the way it generates the executable. Thanks.
Coccinell 29. Apr 2011	Just switch off the package support for compilation. It's at Project->Options->Packages->Build with runtime packages. Then everything needed will be put into your executable (except external DLL's of course), only your EXE will be considerably larger then.
wt0vremr Author 29. Apr 2011	Damn it. I'm really sorry, everyone. Im not gonna upload any more delphi crackmes. Only assembler now.
BondCracked 29. Apr 2011	Borgiman ---> You're super ;-)
Borgiman 29. Apr 2011	you're welcome :D
bluewaveck 29. Apr 2011	Nice Crackme, I wrote a keygen for it and I'll probably post a solution/tutorial on Youtube. When I get it up it will be on my account: http://www.youtube.com/user/bluewaveck7.
wt0vremr Author 30. Apr 2011	Borgiman, you rock! bluewaveck, I'm really looking forwrd to it :)
bluewaveck 01. May 2011	recorded today but audio was out of sync hope to record tomorrow with a smaller portion of the screen to free up resources and get the a/v back in sync
BondCracked 02. May 2011	Solution sent with an asm keygen (FASM).
kudesnik 01. Aug 2012	var a,b,len:integer; begin len:=length(edit1.Text); if name='' then begin edit2.Text:='please insert your name...'; end else if (len<=4) then begin edit2.Text:='more name 4 char ...'; end else begin asm MOV EAX,len IMUL EAX,07DBh mov a,eax MOV EAX,len IMUL EAX,044Eh mov b,eax end; edit2.Text:=('KL19-IY7D'+inttostr(a)+'-GA4S-OD1T-B6RE-'+inttostr(b)); end; end;
knightluffy 12. Jun 2013	rtl70.bpl not found.. Could you please rebuild one?
zairon Moderator 12. Jun 2013	No need to rebuild, you can download the necessary bpl files from the net.

wt0vremr's YouFirstCrackme

Download YourFirst.zip, 10 kb (password: crackmes.de)
Browse contents of YourFirst.zip

===================================
This is a crackme for total newbies.
It is meant to be your first.
===================================

Difficulty:
- Very very very easy

Platform:
- Windows

Language:
- Assembler

Objective:
- Remove nag screen
- Remove debuging protection
- Pass CD check
- Write a solution

===================================

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 28. Apr, 2011
Downloads: 1704

Rating

Votes: 7
Crackme is boring.

Rate this crackme:

Solutions

Solution by uzyszkodnik, published 08. feb, 2012; download (12 kb), password: crackmes.de or browse.

uzyszkodnik has rated this crackme as nothing special.

Solution by l46kok, published 08. feb, 2012; download (11 kb), password: crackmes.de or browse.

l46kok has not rated this crackme yet.

Solution by Axel.NET, published 08. feb, 2012; download (29 kb), password: crackmes.de or browse.

Axel.NET has not rated this crackme yet.

Solution by Borgiman, published 08. feb, 2012; download (11 kb), password: crackmes.de or browse.

Borgiman has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

BondCracked 29. Apr 2011	Only patching, right?
wt0vremr Author 29. Apr 2011	Yes, patching and solution :)
Borgiman 29. Apr 2011	Patched EXE and solution sent :)
Axel.NET 30. Apr 2011	Solution Submitted well isDebuggerPresent was relaly easy :P
wt0vremr Author 30. Apr 2011	Axel.NET, of course. All this "protection" is just to help a newbie to know about a couple of WINApi functions :) There are few crackmes for REAL newbies, guys who just discovered reversing. And this one is for them.
wt0vremr Author 30. Apr 2011	Axel.NET, Thanks a lot :)
l46kok 30. Apr 2011	Solution Sent. This is my first time ever sending a solution, so if I did something wrong, please let me know!
Gaspa79 01. May 2011	I won't upload my solution cause this is easy for everyone. However, it helped me to practice my newbie-reversing skills. This is a newbie thanking you for developing this crackme!
BondCracked 02. May 2011	Gaspa79 I respect your opinion, but I think the diversity of solutions could help us to grow more and more in our studies. I sent a solution using a loader and it works well.
wt0vremr Author 02. May 2011	A loader? Sounds interesting :) I'm looking forward to reading all your solutions.
loneferret 13. Feb 2012	Good one; had to look up about that debugger protection lol. Nice little challenge at the end too.
Anarh1st 28. Apr 2012	Thank you, i can remove debuging protection, pass CD check and remove nag screen BUT after removing nag screen the crack me giving an error to me (http://konga.ru/CokV), i think it is because im an noob and do some-thing wrong :) p.s. Sorry for my english, Im Russian pupil :)
madeyes 29. Apr 2012	Anarh1st: If you notice when you remove the CD key check there is a JMP to INT 3 (break into debugger) which is past the return from the procedure. Look at where the JMP goes after the CD check fails...
kranked 09. Jun 2012	Nice Crack me!! learned alot!!
Frodo478 09. Nov 2012	Very good crackme!! simple but with many different solutions ;)
cracknoob 02. Nov 2013	uauu i took 2-3 hours WITH TUTORIAL to crack this xD my 1st crackme patched kkkkkkk
ximera 28. Nov 2013	Thanks, Very simple crackme, one jmp, two nop's, and 1 byte in memory changed.
ximera 28. Nov 2013	00401000 > 33C0 XOR EAX,EAX 00401002 8903 MOV DWORD PTR DS[EBX],EAX 00401004 EB 0D JMP SHORT YourFirs.00401013 00401190 90 NOP 00401191 90 NOP
Liro 13. Jun 2014	This is my really first crackme I have done without cheats and other solutions =) Really nice, thank you)
cl0pen 16. Jun 2014	Excellent crackme - posted an in-memory solution using WinDbg/IDA on my blog: http://cl0pen.blogspot.com/2014/06/reversing-for-fun-yourfirstcrackme.html

x3chun's Crypto KeyGenMe #2

Download keygenme2.zip, 11 kb (password: crackmes.de)
Browse contents of keygenme2.zip

yeah! this little keygenme is very easy to solve !

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 07. Nov, 2003
Downloads: 2225

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by bLaCk-eye, published 13. dec, 2003; download (20 kb), password: crackmes.de or browse.

bLaCk-eye has not rated this crackme yet.

Solution by scarebyte, published 30. nov, 2003; download (35 kb), password: crackmes.de or browse.

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Solution by BytePtr, published 16. nov, 2003; download (46 kb), password: crackmes.de or browse.

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Discussion and comments

x3chun's KeyGenMe#1 Crypto used

Download keygenme.zip, 35 kb (password: crackmes.de)
Browse contents of keygenme.zip

enjoy crypto!

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Aug, 2003
Downloads: 1617

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by scarebyte, published 04. jan, 2004; download (39 kb), password: crackmes.de or browse.

scarebyte has rated this crackme as quite nice.

Solution by super-sfistack, published 09. sep, 2003; download (26 kb), password: crackmes.de or browse.

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Discussion and comments

x3chun's KeyGenMe3

Download keygenme3.zip, 25 kb (password: crackmes.de)
Browse contents of keygenme3.zip

Are u Familliar with KeyGenMe ?

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Jan, 2004
Downloads: 1484

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by BadSector, published 17. jan, 2004; download (25 kb), password: crackmes.de or browse.

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Discussion and comments

x4uth's SerialMe5

Download CrackMe05.zip, 142 kb (password: crackmes.de)
Browse contents of CrackMe05.zip

The goal is to get a valid serial, no patching

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 15. Jun, 2008
Downloads: 537

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by JoKa, published 14. oct, 2008; download (7 kb), password: crackmes.de or browse.

JoKa has rated this crackme as quite nice.

Send a message to xbiohazardx »

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Discussion and comments

Zaphod 30. Sep 2008	Is anyone working on this one? I have two problems: 1. There is some antidebugging which I cannot pass. I would like to see a solution for this. 2. I can get to work on the serial algo by starting the crackme first and then attaching Olly - instead of running Olly first and then start the crackme. I think I have figured out how the algo works, but I also think that it is impossible to find a solution. I hope some expert will have a look at it :)
Zaphod 02. Oct 2008	I was wrong - it can be solved. I got help from x4uth. It's a really nice crackme. It doesn't take special math knowledge or anything, it just requires you to think ( which I didn't :)
ShadowRayzz 04. Oct 2008	Stuck with the protection so far :P it's interesting.
ShadowRayzz 04. Oct 2008	Haha, can't pass the protection :D it's sweet!
Zaphod 05. Oct 2008	ShadowRayzz, I still can't pass the protection, either, but run the crackme and attach Olly - then it works.
DigitalAcid 05. Oct 2008	When I attach it to Olly, I get a DbgBreakpoint thing... I'm using a standard Olly version, so no anti-anti-debug stuff. It seems to go better without attaching, but i still don''t quite figure out the protection =).
HMX0101 05. Oct 2008	The anti stuff is very easy to bypass... the trick is in the VirtualProtect api.. =) And btw, it have anti-bp too ;p
Zaphod 06. Oct 2008	DigitalAcid: I have no problems attaching Olly, but that might be because I have the "AdvancedOlly" plugin... HMX0101: If it is so easy, then please write a tutorial :)
Ox87k 06. Oct 2008	@Zaphod: i can run it inside my Olly without any problem :) Did you try phant0m plugin?
Zaphod 06. Oct 2008	0x87: You are right! I tried ticking off all options in phantom, and then it runs fine! Nevertheless, I would like to be able to pass the protection without phantom. I would probably learn something from that:)
ShadowRayzz 07. Oct 2008	Would be amazing if anyone could submit a valid solution and detail how he did it :D
Ox87k 07. Oct 2008	@Zaphod: Just a quick note, i notice that OllyDbg2 doesn't crash also without any plugin :)
Zaphod 07. Oct 2008	Thanks, 0x87. In the meantime I have found out about the mystery (HMX0101 helped me). It has to do with the way Ollydbg1 handles VirtualProtect and PAGE_GUARD.
ShadowRayzz 08. Oct 2008	Well, i passed the protection, seems like he added more then a single bad boy message and allot of conditional jumps, makes it a little hard :P
Laurance_1111 10. Oct 2008	Any hints to pass the protection? Thanks
JoKa 13. Oct 2008	Laurance 1111: call dword [ebp-18h] at 401199 goes to PAGE_GUARD memory. OllyDbg handles STATUS_PAGE_GUARDED exception as breakpoint. To pass protection generate some other exception at address dword [ebp-18h] (for example, division by zero). Or use some plugin to change OllyDbg behaviour. Thanks to Zaphod, HMX0101 for hint.
JoKa 16. Oct 2008	Zaphod showed me good idea of 2d-representation of "moves". This transforms mine field to labyrinth. Such idea allows to find solution without exhaustive search.
Zaphod 16. Oct 2008	Well, I have to admit I got the good idea from x4uth himself :)

xbiohazardx's Easy Crackme

Download Crackme_-_BioHazard.zip, 13 kb (password: crackmes.de)
Browse contents of Crackme_-_BioHazard.zip

Yes, the password is really SmokinShortz

its pretty easy. for newbs :P

this is my first crackme

thats about it

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 02. Jun, 2008
Downloads: 1089

Rating

Votes: 6
Crackme is boring.

Rate this crackme:

Solutions

Solution by M|GHTY K|nG, published 23. mar, 2011; download (6818 kb), password: crackmes.de or browse.

M|GHTY K|nG has rated this crackme as nothing special.

Solution by xylitol, published 11. jul, 2008; download (3310 kb), password: crackmes.de or browse.

xylitol has rated this crackme as nothing special.

Solution by costy, published 11. jun, 2008; download (540 kb), password: crackmes.de or browse.

costy has rated this crackme as quite nice.

Send a message to xdstyla »

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Discussion and comments

xbiohazardx Author 02. Jun 2008	lets see some solutions ;)
PrincessJade 02. Jun 2008	that sure lived up to its name of easy lol but it gave ne something to do thanks
xbiohazardx Author 02. Jun 2008	lol ^^ told ya :)
PrincessJade 02. Jun 2008	btw the key does not seem to disable the timer as described so i just patched it, is it spose to work?
obnoxious 02. Jun 2008	eh! Was it supposed to be that silly. lol ;)
born2c0de 02. Jun 2008	lol, that's one of the silliest crackmes I've ever seen. Nice one though, should be somewhat of a challenge to a newbie.
xbiohazardx Author 02. Jun 2008	@PrincessJade yeah. i forgot to change that in the clue.. @obnoxious yeah kinda lol
k3nny 02. Jun 2008	Never thought it could entertain me that much lol
xbiohazardx Author 02. Jun 2008	well for my first one i thought i would make it easy :D
MulleDK13 08. Jun 2008	uhm.. is ollydbg meant to launch the crackme automaticly? It just loads the crackme, and I can't see shit in the debugger.. Not until I close the crackme. Even then, I can't figure how to do it -.-
DigitalAcid 08. Jun 2008	You can't use Olly for .NET applications. Try Reflector or search another program for .NET.
costy 10. Jun 2008	@PrincessJade The key doesn't disable the timer but there is another way to disable it. I wrote a solution and I think that it should be accected. Anyway... In order to disable the timer you have to doubleclick in a specific area of the main form. Bye
xbiohazardx Author 17. Jun 2008	costy nice solution but you dont have to copy and paste the text...
fawad 17. Jun 2008	There were no restrictions so I removed the code where I could to avoid checks on Registry entry. I have uploaded my patched version.
costy 17. Jun 2008	@xbiohazardx Why not?? There isn't any rules against copy and paste! :-/
xbiohazardx Author 18. Jun 2008	okay wtf from now on no patching

xdstyla's xdstyla's CrackMe #1

Download Crackme1.zip, 49 kb (password: crackmes.de)
Browse contents of Crackme1.zip

CrackMe #1 by xdstyla

Hint: There's ony one right Serial.

written in C++

Goal:
Find the right serial.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 13. Jan, 2010
Downloads: 1226

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by Erdorkar, published 22. jan, 2010; download (51 kb), password: crackmes.de or browse.

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Discussion and comments

xiayuanzhong's CrackMe(HardestShell)20110404

Download CrackMe20110403.zip, 129 kb (password: crackmes.de)
Browse contents of CrackMe20110403.zip

[Obsolete]
It's a Console Programm, but its shell is too hard to unpack. So Unpacking is the hardest!
If you unpack it successfully, you will see my email, and I want you to teach how to unpack it.
Thanks and Good Luck!~!
[\Obsolete]

Make a keygen!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 23. Apr, 2011
Downloads: 632

Rating

Votes: 3
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by acruel, published 26. oct, 2015; download (1 kb), password: crackmes.de or browse.

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Discussion and comments

xiayuanzhong Author 27. Apr 2011	It has no shell now, because the shell was thought to be a virus. I had to unpack it, so it is pretty easy.
Axel.NET 15. Apr 2012	Hi my dear xiayuanzhong@126.com
Natrium 05. Jun 2012	Uhm okay http://epvpimg.com/SmPCf
xiayuanzhong Author 05. Jul 2012	Need Keygen, cheer up, Matrium!~
Sl!ce 28. Jul 2012	NameLength = unknown_libname_19((int)&Name); UnknownName = NameLength + 4; PassLength = unknown_libname_19((int)&Password); if ( UnknownName == PassLength ) break; POSTERROR(); } for ( i = 0; i < NameLength; ++i ) { v27 = 1; NameIntData = _ZNSsixEj(&Name, i); Length = NameLength - i - 1; CheckIntData = _ZNSsixEj(&Password, Length); if ( (_BYTE )NameIntData != (_BYTE )CheckIntData ) { v6 = CharPlusTen(-1); v34 = CharMinusTen(v6); POSTERROR(); break; } } Length = NameLength + 3; v27 = 1; if ( (_BYTE )_ZNSsixEj(&Password, Length) != 122 ) { v7 = CharPlusTen(-1); v34 = CharMinusTen(v7); } v27 = 1; if ( (_BYTE )_ZNSsixEj(&Password, NameLength) != 95 ) { v8 = CharPlusTen(-1); v34 = CharMinusTen(v8); } Length = NameLength + 1; v27 = 1; if ( (_BYTE )_ZNSsixEj(&Password, Length) != 120 ) { v9 = CharPlusTen(-1); v34 = CharMinusTen(v9); } Length = NameLength + 2; v27 = 1; if ( (_BYTE )_ZNSsixEj(&Password, Length) != 121 ) { v10 = CharPlusTen(-1); v34 = CharMinusTen(v10); } v27 = 1; v11 = CharPlusTen(v34); v22 = CharMinusTen(v11); v12 = CharPlusTen(0); v13 = CharMinusTen(v12); } while ( v22 <= v13 ); v14 = CharPlusTen(v34); v21 = CharMinusTen(v14); v15 = CharPlusTen(0); v16 = CharMinusTen(v15); if ( v21 > v16 ) POSTSUCCESS(); What i've got so far, makes not really sense for me adding 10 and subtracting it again in the next line? Why used the Password when you need the Name? (_BYTE )_ZNSsixEj(&Password, Length) is something like Password[Length] i think.
dohuff 06. Dec 2014	i have done it, nice one! my user: abcde correct password: can i post it? simple algo but needs time i was confused a bit because everything is in the stack and i can't rename addresses example: mov eax, 0012345 --> mov eax,<crackme.user> but with mov eax,[EBP-28] i can't rename to see "user"
Shivajitheboss 14. Oct 2015	i was able to patch it. Can be patched easily. :P I dont have that much smart brain to crack it :(
acruel 17. Oct 2015	Done in 15 minutes. I'm going to post a solution.

xiayuanzhong's XYZ_KeygenMe20110405

Download XYZ_KeygenMe20110405.zip, 131 kb (password: crackmes.de)
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XYZ_KeygenMe 20110405

Difficulty: May be Hard( I can't crack it )

The solution can be:
1. Ten Names and Ten correct Passwords & How you crack it;(basic)
2.Keygen & How crack it;( Good )
3.Keygen & code( cannot be .asm ) & How you crack it;( Well-done )

Written by Xia Yuanzhong, a Chinese; and this is my second time to write KeygenMe
My Email-address is xiayuanzhong@gmail.com
You can ask me for hlep!~

Thanks for using it , and Good Luck!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 23. Apr, 2011
Downloads: 922

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Solutions

Solution by xiayuanzhong, published 11. jul, 2012; download (5 kb), password: crackmes.de or browse.

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Solution by BondCracked, published 28. apr, 2011; download (257 kb), password: crackmes.de or browse.

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Discussion and comments

BondCracked 24. Apr 2011	Difficulty level is not 1. Perhaps 2
xiayuanzhong Author 26. Apr 2011	Anyway, I can't crack it. But the code is very short(down to 200, and I set a lot of cheating jump,that's really not short)
da$mu 26. Apr 2011	Could anybody please send me the solution? I'm new at reverse engineering and don't know how to go on 'cause I can't find the error-line which is printed. The only thing I found out is that the name and the password have to do with the months (January/ Jan) and the days of the week (Monday/ Mon). Thx in advance.
BondCracked 27. Apr 2011	I have the solution. Now I'm working on a tut. Thanks xiayuanzhong who approved the sources. Please, you say that you can't crack it. How? Didn't you make the keygenme?
BondCracked 27. Apr 2011	da$mu are you talking about this Keygenme? The password and the name haven't anything with the month and day. Look it better.
xiayuanzhong Author 27. Apr 2011	Re “da$mu”, My KeygenMe doesn't do with the months (January/ Jan) and the days of the week (Monday/ Mon). And, BondCracked's solution is excellent, and he is now writing a tutorial. Re"BondCracked", I don't know how to use OllyDebug to crack. I just recieve your tutorial email. I'll download and learn it, thanks a lot.

xiayuanzhong's XYZ_KeygenMe20110505

Download XYZ_KeygenMe20110505.zip, 129 kb (password: crackmes.de)
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Because of my College Entrance Examination, this KeygenMe was delayed.

Introduction:
1. The interface is similar to my last KeygenMe-KeygenMe20110405, but the code is different.
2. I spend 0.5 h thinking and 2 h programming.
3. I'm confident about this KeygenMe. Although it can be harder, I stopped. Step by step~ My next KeygenMe will be harder.
4. You can ask me for help at any time. And after crack it, send me your tutorial and Keygen. You will receive my annotated code.
5. I've written a 40 lines Test Keygen. So the Core procedure is short. HaHa~~~
6. I think you will make a mistake, so be carafully.

Sulution:
tutorial and Keygen

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 11. Jun, 2012
Downloads: 1365

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Solutions

Solution by xiayuanzhong, published 06. jul, 2012; download (4 kb), password: crackmes.de or browse.

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Solution by leepupu, published 25. jul, 2012; download (245 kb), password: crackmes.de or browse.

leepupu has rated this crackme as quite nice.

The submission of solutions is closed.

Discussion and comments

bearchik 14. Jun 2012	Name: Bearchik Pass: X3_BfcugmorJnk}ouw I don't understand how calculate password length. I created table with all lengths from 6 to 14 symbols. :)
llirikov 14. Jun 2012	bearchik, function at 0040210E calculates password length depend on name's length. Bzw, my pair: llirikov:X3_lmkumpu}tus}ux}
xiayuanzhong Author 16. Jun 2012	re:bearchik I used a Fibonacci-like function to work out the length, to be more exact, it is a 3-level-Fibonacci. I will send the Keygen source then. Try more please!
izl3sa 19. Jun 2012	name : izlesa pass : X3_i{nhw ^___^
bombig001 20. Jun 2012	I dont get it with ollydbg i search in string for Erorr! Try Again but cant find. even manuely..
bearchik 20. Jun 2012	re:bombig001 Enter your name, click pause in OllyDbg. You can search the name in memory. When you find your entered name - use Breakpoint on memory on Access.
yorath 26. Jun 2012	name: yorath password: X3_yptdx
sdb0 10. Aug 2014	name: qwerty password: X3_qxgux I m pro :D
tinmarino 06. May 2015	With IDA search your string in memory with "alt+B". Each strings are hidden, not packed. very well written. Good luck. I'm noob, did it in 2h. with many breakpoints.

ximus's 4F.CrackMe1

Download crackme1.zip, 13 kb (password: crackmes.de)
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First crackme.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 10. Jul, 2008
Downloads: 467

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Solutions

Solution by hound, published 11. jul, 2008; download (20 kb), password: crackmes.de or browse.

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Solution by obnoxious, published 11. jul, 2008; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

Bispoo 10. Jul 2008	Solved! , nice crackme mate :)
Bispoo 10. Jul 2008	i've sent you a message with my registration details :) gonna make a keygen by the morning, when i wake up, good luck to the rest of you guys reversing it.
simonzack Moderator 10. Jul 2008	it was the easiest using that as name, sorry if misleading
AloneInTheDark 10. Jul 2008	Very simple with patch :)
hound 10. Jul 2008	Nice and easy one. Keygen written. Will write up a solution :)
simonzack Moderator 10. Jul 2008	sorry for posting up valid serial/pass, didn't know it wasn't allowed. Uploading solution soon
zairon Moderator 10. Jul 2008	OT: No problem simnzack. If you have to say something that it's not related with the crackme use a private message :)
Till.ch 10. Jul 2008	It's a simple crackme, maybe a little bit too high for level 3. anw. thanks for it (:
Till.ch 10. Jul 2008	*oops I meant: "maybe a little bit too EASY for level 3."
hound 10. Jul 2008	Yeah, I agree as well :). Nice simple crackme though.

ximus's 4F.Crackme #2

Download crackme2.zip, 619 kb (password: crackmes.de)
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my second crackme.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 15. Jul, 2008
Downloads: 579

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Solutions

Solution by PeterPunk, published 19. jul, 2008; download (3 kb), password: crackmes.de or browse.

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Discussion and comments

starlight 16. Jul 2008	It seems contains a large number of floating-point operations, I found I'm not good at this
obnoxious 16. Jul 2008	more fpu than i ever have seen. m only done half the way gonna take me some more time ;)
obnoxious 17. Jul 2008	ok correction more fpu and mmx than i have ever seen ;)
~misunderstood~ 19. Jul 2008	^^ sounds quite interesting...I think I´m gonna try :D
~misunderstood~ 21. Jul 2008	@ PeterPunk thx a lot for your solution, I see clearer now....I mastered the first part (the appearance of the serial), but then got stuck within all those math operations. @ ximus I liked your idea with laughter and applause (though the laughter made me VERY angry at first :D).

[xorolc]'s jelly

Download jelly.zip, 4 kb (password: crackmes.de)
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name/serial

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. May, 2001
Downloads: 1822

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Solutions

Solution by zynker, published 02. may, 2001; download (7 kb), password: crackmes.de or browse.

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[xorolc]'s steps

Download steps.zip, 264 kb (password: crackmes.de)
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5 crackmes for newbies

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 12. Apr, 2001
Downloads: 2484

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Solutions

Send a message to xrem »

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

xrem Author 03. Dec 2008	[Bug : IDE Pro can't debug it...]
xrem Author 11. Dec 2008	===================== = CrackMe Awaits solution =) = =====================
simonzack Moderator 25. Jan 2009	u rly did make me solve it... and waste some precious 10 minutes recovering delphi bit by bit using dede c'mon, for such a simple crackme use something like c++ this is actually a level 1 crackme: algo: func(name)+func(id)==pass what's the point of cracking these things???
xrem Author 28. Jan 2009	simonzack, Sorry , i speak english bad, i can't answer u question, algo right!) But this FUNCtion .... )) >this is actually a level 1 crackme why that no soulution yet? Published: 01. Dec, 2008 Downloads: 153
asterix 15. Sep 2009	[ Registred to : @sterix QHN0ZXJpNzU2NDE= 75641 ]

xrem's XTrash v1.0 [Delphi]

Download XTrash.zip, 35 kb (password: crackmes.de)
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X-rem's XTrash CrackMe.
The difficulty of your crackme : [2.5] Getting harder... :}
Platform : Windows
//sorry for my bad english
------------------------------------------------------

I use only one {my own} KryptoFunction... Everything will crypted =)
But.... Password = encrypt(salt1+realpassword+salt2) ....etc 0.o
Put you hands into TrashBin and find password, and every day {it's hint}
password will change, so write keygen)

80% - Trash code.
5% - algo code.
3% - password string;)
12% - Resources.

Pacthing allowed.

Difficulty: 3 - Getting harder
Platform: Windows
Language: Borland Delphi

Published: 23. Feb, 2009
Downloads: 305

Rating

Votes: 4
Crackme is boring crap.

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Solutions

Solution by mazuki, published 11. mar, 2009; download (201 kb), password: crackmes.de or browse.

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Discussion and comments

xrem Author 23. Feb 2009	So.... let's begin!)
Fauzt 28. Feb 2009	Some simple patching will make it generate a valid "password" - eg. act as its own keygenerator. Definitely not a : Difficulty 3.
xrem Author 01. Mar 2009	now i agree ) Diff: 1.5 )
mazuki 08. Mar 2009	password never seems to change for me, i have 1 password that is always working
Cat2 08. Mar 2009	Password never changes for me either, so I don't see how we can write a keygen for this... if password is always same.
xrem Author 09. Mar 2009	08 March will one password 09 March will another
mazuki 09. Mar 2009	got it done with pass maker, will post tutorial and passmaker by the end of the day sorry i missed the "every day password will change"

Xspider's xCryptokGnMe #1

Download xCryptokGnMe1.zip, 69 kb (password: crackmes.de)
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Hi all :D
This is my 1st keygenme coded using masm ;)
See About btn for description!!

Cya

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 15. Feb, 2009
Downloads: 510

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Votes: 6
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Solutions

Solution by m!xed, published 10. mar, 2009; download (78 kb), password: crackmes.de or browse.

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Discussion and comments

andrewl.us Moderator 15. Feb 2009	Nice MASM coding and decoys, Xspider :) But a little extra effort could have thwarted fishing.
simonzack Moderator 17. Feb 2009	most level 2s can be fished :p
Xspider Author 18. Feb 2009	@andrewl.us: thank you for the kind words :D but i'm still learning it ;)
simonzack Moderator 19. Feb 2009	wow, at first i looked through it, i thought you were using all that mmx o.o, then seems you didn't use them after all???
Xspider Author 19. Feb 2009	no i don't think i used them :p
m!xed 10. Mar 2009	good challange :) too many cryptos sig :D
Xspider Author 11. Mar 2009	g0od work mate :)
mazuki 20. Mar 2009	i've got another solution, thought i'm not as knowledgeable as m!xed seems to be with the encryption formats, it will work and i will post soon
blackjoker 22. Mar 2009	THX Yeah! so Good Is Funny
m!xed 14. Jul 2009	@mazuki: too many trap there :)

Xspider's X-KGNME#3

Download X-KGNME#3.zip, 35 kb (password: crackmes.de)
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See ReadMe.nFO ;)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 14. Apr, 2008
Downloads: 672

Rating

Votes: 5
Crackme is boring.

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Solutions

Solution by PeterPunk, published 22. jun, 2008; download (12 kb), password: crackmes.de or browse.

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Discussion and comments

apuromafo 15. Apr 2008	nice!, and the anti-vbstrcm is the first coded that see interesting
Xspider Author 15. Apr 2008	yes, but when you rename it, it can't be detected :S
apuromafo 16. Apr 2008	yes i know that, but is interesant that are in a crackme thinked that that tool are see for thats is nice!

Xspider's X-KGNME #4

Download X-KGNME#4[FIXED!!].zip, 40 kb (password: crackmes.de)
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Always see the ReadMe.nfo ;)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 15. May, 2008
Downloads: 621

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by movzx, published 31. may, 2008; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

Unregistered ! 18. May 2008	Hi Xspider, I have tried to crack your crackme, I fished the code then i tried to check with your crackme, after i clicked the Check button, it say "Wrong serial..." and the Check button was disabled ! Is that bug ? Sorry for my poor English...
neo_40 18. May 2008	this is a good one, I am a beginner so please help me out.............
Xspider Author 21. May 2008	@Unregistered !: i don't think is a bug, maybe the keyfile doesn't exist!! ;)
w02057 27. May 2008	Hi guys Im a beginner to Assembly. and was wondering if you had any good tutorials or tools that would aid me in my learning. Im already good at cracking .NET apps, but I want to try something more challanging. Thanks in advance
Xspider Author 28. May 2008	@w02057: hi, here is a g0od tutorials website :) _http://www.tuts4you.com/ hope you find something there, and i'm sure you will ;)
movzx 29. May 2008	solution submitted... waiting for approval.. :D
Xspider Author 01. Jun 2008	nice good solution, keep on movzx, btw i like it :D

xSRTsect's Dalvik#1 - cRaCkMe!

Download dalvik1.zip, 965 kb (password: crackmes.de)
Browse contents of dalvik1.zip

Android crackmes series will follow. The first one runs directly under the Dalvik VM - its very easy, just for mere introduction on the subject. Rules are:

-> Only a keygen is allowed and the keygen should be written to run in the same platform as the crackme (should also run under android).

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 25. Aug, 2016
Downloads: 81

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Solutions

Solution by DimitarSerg, published 20. oct, 2016; download (18 kb), password: crackmes.de or browse.

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Discussion and comments

DimitarSerg 15. Sep, 06:49	DimitarSerg D33E6E294-FB81D497A5-91C3F0E811-B7-5D8937DE30-C28B491682-4781A7CBCD-74-BB76935C2F-A6EE09C19-C07ACB5F7-55-77F6FC8F4-D797A13989-FA743612C6-99 today I'll upload the solution, but compiled in NetBeans (Java)
DimitarSerg 15. Sep, 14:54	uploaded solution

xtFusion's K1

Download k1.zip, 6 kb (password: crackmes.de)
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Ok this is my first crackme it is a very easy one so
injoy!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 07. Oct, 2006
Downloads: 1109

Rating

Votes: 7
Crackme is boring.

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Solutions

Solution by redoC, published 22. jun, 2010; download (25 kb), password: crackmes.de or browse.

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Discussion and comments

red477 09. Oct 2006	Nice crackme!!! But a small bug coz of lazy code:when the name or serial is too short, good message will come after the error message;) Good idea, anyhow.
SaXoN 09. Oct 2006	Ill check it out when i get home =) Thanks!
xtFusion Author 09. Oct 2006	red477 sorry for that bug! i was so sleepy when i did this for fun i hope you could work around it!
Zaphod 15. Oct 2006	How do I make this program stay on the screen? I type a name, hit ENTER, type a serial, hit ENTER - and it disappears. When the name or serial I enter has no letters, I don't get to see the error message or the good message. The window disappears. I can see in Olly that the program behaves like red477 says, but shouldn't there have been a "getch()" or something in the end of the code?
DeepBlue 15. Oct 2006	Just open the Crackme from the windows-prompt.
Zaphod 16. Oct 2006	Yes, of course! That was stupid! Thanks!
jB_ 16. Oct 2006	A variable has not been initialized in the code. Check offset 40132F. Bug?
Zaphod 18. Oct 2006	It seems to me that jB is right. At that point there are 3 dword's which affect the serial calculation, ebp-14, ebp-18 and ebp-1c. The two last are always the same, but ebp-14 change all the time. I have traced it to the value of edi when the program starts, and this value is often 0, sometimes 1, sometimes 2, and sometimes something completely different. So it doesn't seem possible to find a serial that will work all the time. Please prove me wrong, xtFusion...:)
Sotanat 14. Nov 2006	This should be the correct combination: Tanatos / 9153f4eb but the "Corect , no" msg isn't shown...so guess thats a bug xtFusion...
Zaphod 14. Nov 2006	I don't think there IS a correct combination. I found several combinations that work sometimes, like Zaphod / b21dbb7d or Zaphod / b21dbbb8 or others... But they only work sometimes in Olly, never outside Olly. Unfortunately xtFusion doesn't seem interested in participating in this debate...
refraction 31. Mar 2007	that was a toughy, but i got there in the end, enjoy the first solution :)
refraction 31. Mar 2007	oh and Zaphod, to prove it works (hopefully) try Zaphod / b18d1b1f
starzboy 31. Mar 2007	@jB_ yes mate ebp-14 is shure chnaging allways ... and in olly u see the good message but not outside olly... seems he forgot to put a lil pause after the "correct".
refraction 31. Mar 2007	whoops, do i feel an idiot, umm, when my solution is up, ignore the fact i said ESP instead of EBP, i know what i meant :D
Zaphod 01. Apr 2007	refraction, I tried "Zaphod/b18d1b1f", but that doesn't work either, it is the same as the other combinations...
refraction 02. Apr 2007	you are right, its machine independant, i made it under xp64, works perfect, go into xp32, doesnt work :/ what makes it more annoying, i got the value from xp32 which works and tried it on an other xp32 machine, it doesnt work very grrish
born2c0de 20. Aug 2007	Nope refraction, the serial is not machine dependent. jB and Zaphod are right. The value in the uninitialized variable ends up changing the serial number. Hence, it is not possible to write a Keygen for this one unless we use ReadProcessMemory() and some really smart code to find and read the value of the uninitialized variable.
Andrey_Kolokol 02. Nov 2007	I've wrote a loader/keygen for this crackme ). Some trick with uninitialized variables found. Good for newbies. Thanks!.)
SIDEBOTTOM 17. Dec 2007	So what is the result of the EBP-14 problem? Has anyone figured out the answer? Was EBP-14 designed to have different values depending on some variable or was it an accidentally uninitialized variable due to "lazy coding?"
tema 19. Jun 2010	Guys, this crackme rejectes all keys at my PC. I tried user name a one symbol 'a' and serial for this one-word name is 573edbcb just look: 004013F1: CMP DWORD PTR SS:[EBP-10], 1 boolean variable at this address SS:[EBP-10] determines if our serial is wrong ( or right if the variable is not uqual to one). Let's see where this variable is changed. 004013E3: MOV DWORD PTR SS:[EBP-10], 1 But this instruction is never executed! Then let's set a write breakpoint on this memory region and find where does it set to 1. Our debugger breaks on instruction: 004011DF: mov dword ptr [esp], eax ;eax == 1 This is something like startup application code. And there are no breaks after this instruction. So this VARIABLE WASN'T INITIALIZED TO ZERO before comparing two serials.

xvpz's Super Mario Cracker

Download ext-keygenMev21asm.zip, 6 kb (password: crackmes.de)
Browse contents of ext-keygenMev21asm.zip

This is a keygenme/reverseme, the scheme is written bymyself..

There's a wrapper, but the unwrapper code is buggy (needs to be patched in one place to reveal the real code), this is meant to be!

Found where to patch ? Goodie, then you have to change something else... otherwise the application will crash (a good hint is know how a PE-file and its sections works).

Done? Then it's only the keygenning part, don't use anything else than a-z A-Z in the username-field, otherwise it maybe not work as intended.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Assembler

Published: 05. Aug, 2008
Downloads: 288

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Solutions

Solution by SnakingMax, published 09. feb, 2016; download (4 kb), password: crackmes.de or browse.

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Discussion and comments

prasid 31. Jul 2008	keygenme.exe.exe has encountered a problem and needs to close. We are sorry for the inconvenience. What can I do?
TiGa 31. Jul 2008	It's one of the challenges of this crackme, as written in the description. "There's a wrapper, but the unwrapper code is buggy (needs to be patched in one place to reveal the real code), this is meant to be!"
TiGa 31. Jul 2008	A wrapper is a very simple packer. The wrapper encrypted part of the code so the unwrapper must decrypt it during runtime. There's 2 things to fix to make it run: 1 byte and 1 something else. It's easier to fix the something else first.
Till.ch 31. Jul 2008	All over it's a nice KeygenMe, but I found some flaws. Length checking would be useful and the Char Table in the keygenme is buggy. "a-z A-Z in the username-field" what about D and S ;) Thank you for this keygenme :>, files sent by pm.
HMX0101 01. Aug 2008	Nice keygenme.. but its buggy as Till said.. the char table doesn't contains D,S and 0... another bug, if you enter more than 20 chars it will start overwriting the serial! :/.. anyway, still is enjoyable ;)
xvpz Author 06. Aug 2008	ok here´s the new version. Also fixed so that the editboxes doesnt allow more chars than the length of the variables. Seemed to work for me :)
jE! 07. Aug 2008	one strange found: @0040118B: retn 01 one true bug: EDI register not preserved, while used in calculations.
xvpz Author 07. Aug 2008	huh?! The first one is how i coded it, was thinking about doing something with it, but forgot to implement :) About the second one, wich of the calculations are u thinking about ?
jE! 07. Aug 2008	which uses EDI! :)
HMX0101 07. Aug 2008	Just tried to get a key for my name... and guess what? 004032AB 38 4A 47 8JG 004032BB 37 2D 37 00 00 00 2D 63 46 4D 48 2D 47 00 2D 47 7-7...-cFMH-G.-G It can't generate a valid serial for it... another bug? Damn.. mate i think you should take your time to fix it fully :) @jE: in the last three calculations, EDI is preserved and that's bad because you can get some null chars (see my name as example)... before every use of EDI you need to clear it (if you don't plain to use it in another way ;) :D
xvpz Author 07. Aug 2008	Haha ok, just set a breakpoint on the last call testing my nick wich worked... so well thought it should work since no major changes was made (and not in that functions :P) But, i got my idea what causes it.
Grift 08. Aug 2008	Nice keygenme. @HMX0101: the serial routine does work, it could be worth spending a bit more time on. There might be more factors to consider for the valid serial generation than just your name.
xvpz Author 09. Aug 2008	@Grift you're right. For those getting this 0x0h-problem, try enter the bogus serial in another format. But, it was not my intention have this problem, but if it occours, its you who is doing something crazy, since i've been able to generate valid keys for all those saying it's not possible :> Also, if you get this bug, you got an half-generated serial, try replaceing them(the 0x0's) with a random A-Z-char and try to generate again, i can promise u that u will get a correct generated serial. Next time i better don't be drunk doing algos since i don't remember the factors when iam sober :>
simonzack Moderator 12. Aug 2008	there's some code at the end searching for chars in the table, but it seems they are useless Am I wrong??? I made a keygen that can solve if no bugs occur @xvpz: PM sent
xvpz Author 05. Oct 2008	This crackme should be considered solved by simonzack. Tried his solu and it worked with the names i tested.

xxdepelxx's xxdepelxx's basic crackme

Download Crackme.zip, 5 kb (password: crackmes.de)
Browse contents of Crackme.zip

Easy to crack.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 27. Feb, 2012
Downloads: 858

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by juza, published 28. feb, 2012; download (121 kb), password: crackmes.de or browse.

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Discussion and comments

v4r14bl3 28. Apr 2012	The solution by juza does not work if the username's length is below 3.
absolute_stratos 12. May 2014	Got it, fun crack for a noob. Thanks for making it.

XxLXDxX's KeygenMe N°1

Download LXDs_KeygenMe_N°1.zip, 77 kb (password: crackmes.de)
Browse contents of LXDs_KeygenMe_N°1.zip

Just a simple KeygenMe :)
difficulty: 2.5

Rules: No Patching, No Selfkeyengine

enjoy cracking...

greetz
LXD

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 08. Dec, 2010
Downloads: 804

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by draww, published 12. dec, 2010; download (18 kb), password: crackmes.de or browse.

draww has rated this crackme as boring.

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Discussion and comments

draww 26. Nov 2010	submitted my solution.. name: draww serial: 4431911138-9189919844-1341938441
XxLXDxX Author 27. Nov 2010	Nice job draww ;)
draww 28. Nov 2010	thank you... and thanks for this cm..
andrewl.us Moderator 06. Dec 2010	crackme does nothing on random name/serial and also this draww serial and also moderator provided serial - what to do? draww? XxLXDxX? Beuller? Beuller?
XxLXDxX Author 06. Dec 2010	Serials are machine dependend ;)
draww 07. Dec 2010	you have to use submitted keygen to test if it's working.. see my tutorial, one parameter differs from hw to hw. so given serials won't work for other computers.. XxLXDxX made a nice trick there. :)
draww 07. Dec 2010	and after i checked my solution, it seems i have to write a new keygen ;) how strange i didn't implement those CPUID part in the keygen..
draww 07. Dec 2010	submitted updated tutorial & keygen. but i found a bug in keygenme. you had to use movzx eax,al after movsx eax,byte ptr[edi+esi] to make sure you generate positive numbers. suppose that the unique xor string is 0xF6, all loaded numbers are someting like FFFFFFAA and this is a negative number, so the final serial becomes ----------------------------------- cause after converting to decimal, you'll only get the minus sign, not a number.
Tasin 08. Dec 2010	The publish day is 8 december? But the comments are earlier. How funny!!! Anyway waiting for your tutorial draww...
TripleTordo 08. Dec 2010	publish just today, and you have a tut and a keygen?
draww 08. Dec 2010	the original airdate of this crackme was 26 Nov. the crackme had a bug (see my comment 07. Dec, 18:12) so the bug was fixed yesterday. i made some additions to my tutorial and keygen too..
XxLXDxX Author 08. Dec 2010	Yep, bug Is fixed Thx for reporting it draww :)
Jasi 10. Dec 2010	I would really like to see the tutorial.
draww 10. Dec 2010	it is still being reviewed by moderators. be patient :)
Jasi 10. Dec 2010	uh ok.. I'm new. sorry ;)

xylitol's AVR CrackMe

Download Electronic_lock.zip, 346 kb (password: crackmes.de)
Browse contents of Electronic_lock.zip

The dumped microcontroler is a Atmega2560.
A zip with the source code is included, the password is the valid key who light the LED.

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: C/C++

Published: 03. Apr, 2014
Downloads: 485

Rating

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Solutions

Solution by draww, published 01. may, 2014; download (27 kb), password: crackmes.de or browse.

draww has rated this crackme as quite nice.

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Discussion and comments

andrewl.us Moderator 03. Apr 2014	bumping due to original content
draww 10. Apr 2014	it took 1 min to break ;) really 1, lol!
xylitol Author 10. Apr 2014	@draww yeah that the problem with the password lib of arduino who's not really good, but anyway it's still entertaining with IDA ;) And if you want a more serious electronic challenge there is a 25,000$ reward for the one who break this: http://www.elektor.com/e-lock
draww 11. Apr 2014	Thanks for the CM. Indeed it's fun to play with electronic devices :) will check your link…
draww 13. Apr 2014	@xylitol: I looked above link and you need to buy the board first. Then you can participate. Also the deadline is May 1. So I gave up before starting :(
Dark_Prince 14. Apr 2014	It is necessary to have arduino, lcd and keypad for cracking?
draww 14. Apr 2014	@Dark Prince: if you're going to brute-force the password, yes. Otherwise no :) you need to choose correct disassembler, that's all.. also you can simulate the circuit using Proteus software -> labcenter.com
oXYgen 16. Apr 2014	Xylitol you'r back ! xD Tu es un dieux pour moi :D

xylitol's InjectMe #1

Download InjectMe1.zip, 84 kb (password: crackmes.de)
Browse contents of InjectMe1.zip

InjectMe #1 by Xylitol
Goal: Inject a MessageBox and show it at startup
like in message: 'Injected by xxxx'
and in the MessageBox title, make what you want :]

Many ways and possibility for solve it, take the most interesting manner and upload your solution with your Injected EXE

Have fun

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 11. Sep, 2008
Downloads: 1126

Rating

Votes: 5
Crackme is nothing special.

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Solutions

Solution by lgtngstk, published 14. sep, 2008; download (86 kb), password: crackmes.de or browse.

lgtngstk has rated this crackme as quite nice.

Solution by Sinok, published 14. sep, 2008; download (84 kb), password: crackmes.de or browse.

Sinok has rated this crackme as nothing special.

Solution by obnoxious, published 14. sep, 2008; download (85 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

Sinok 11. Sep 2008	Hmm.. do I have to do this within olly?
Sinok 11. Sep 2008	Submitted my.. really simple solution.
stoffern 11. Sep 2008	easy one, first try:)
ShadowRayzz 11. Sep 2008	I was messing with it for like an hour and kept crashing it, then i was like "what are you doing?" and solved it in a min. A nice one :)
crackDog 14. Sep 2008	Even if they did not publish my solution I'd like to say that this was a great crackme for beginners. Good work and code to learn with.
WarRock 14. Sep 2008	not really anything new :D

xylitol's InjectMe #2

Download InjectMe_#2.zip, 105 kb (password: crackmes.de)
Browse contents of InjectMe_#2.zip

InjectMe #2 by Xylitol
Goal: Inject a MessageBox and show it at startup
like in message: 'Injected by xxxx'
and in the MessageBox title, make what you want :]

my first InjectMe are too easy for solve it,
no MessageBox API, i hope you like and have fun with this new version !

if you make a solution
Make the most interesting manner and with detail please !
many guys dont know how to solve that

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 16. Sep, 2008
Downloads: 1286

Rating

Votes: 6
Crackme is quite nice.

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Solutions

Solution by HackBlat10190, published 05. oct, 2012; download (109 kb), password: crackmes.de or browse.

HackBlat10190 has rated this crackme as awesome.

Solution by JoKa, published 18. sep, 2008; download (101 kb), password: crackmes.de or browse.

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Solution by costy, published 18. sep, 2008; download (206 kb), password: crackmes.de or browse.

costy has rated this crackme as awesome.

The submission of solutions is closed.

Discussion and comments

Xspider 16. Sep 2008	that's what we was waiting for :D let's try it then ^^
costy 16. Sep 2008	I really like code injection. I hope you will write an expert version in witch cracker need to insert a function that make sometingh iparticular for example show a picture and play a sound. Sorry about my English I hope it's clear. Good idea xylitol!
obnoxious 17. Sep 2008	costy,xspider long time no see.........
EvOlUtIoN 17. Sep 2008	I posted a solved executable yesterday, maybe it was not good to do, so it was deleted, but it is very very simple because imports can also be added, replaced or aòso you can get address is some different ways. Took about 3 minutes to do.
Ox87k 17. Sep 2008	Agree with Evo, you can simply add an import (MessageBox or GetProcAddress) To get the handle of the dll you can use the import GetModuleHandleA (already imported) So.. many way to solve it ;)
JoKa 17. Sep 2008	I simply changed 2 in comctl32.dll in original file to 3, and created dll with exported InitCommonControls procedure. It must work, but it doesn't. When I debug into deep of user32.dll (from MessageBoxA) I come to call of ntdll.RtlFindActivationContextSectionString which results 0 in crackme but not 0 in my sample program calling the same function of dll. I have no idea. Will try run under WINE.
JoKa 17. Sep 2008	It works under WINE, but does not work under Win XP SP2. Will try on my old WinME installation.
JoKa 18. Sep 2008	It works on WinME.
EvOlUtIoN 18. Sep 2008	I made a more simple solution... I taken InitCommonControls which is totally useless in the program, and changed it to MessageBoxA (of course i changed also dll name). After it i gained also space to inject the messagebox since 5 bytes at the start of code was free.
JoKa 18. Sep 2008	I don't agree with the fact, that InitCommonControls is totally useless in the program. I don't know the reason but on my WinXP SP2, patched exe doesn't work without this call.
HMX0101 18. Sep 2008	The messagebox can be called without adding imports, just using GetModuleHandleA as 0x87k said ;)
yomshleeshee 19. Sep 2008	Good one. Demonstrates importing really well. n00b question though. What's the difference between this and your first one, such that when I try and jmp at the original entry point and put the messagebox code somewhere else, as in Sinok's solution (well explained btw) to your 1st inject me it doesn't work. But when I put the code at the end in the area with just "00" and move the entry point, it works. What's the difference? Hi btw. New here. Been working crackmes here for a week or so. very nice.
costy 19. Sep 2008	@yomshleeshee The difference is that the first crackme already use MessageBoxA to show a message. So the import table of the program (the import table is the list of function used) already contains MessageBoxA. This one is different becouse the original crackme doesn't contains MessageBoxA in its Import Table.
yomshleeshee 19. Sep 2008	@costy Thanks! BTW I really enjoy the dialog and way you guys explain these solutions. Helps learning RE a lot. Keep it up!
EvOlUtIoN 24. Sep 2008	I have WinXP sp2 and all works well without initcommoncontrols call. Also i made lots of asm programs all without initcommoncontrols and all worked. Maybe you can need it but it is not important, just set OEP in another place and add an import as alreadyu described. Anyway it is also simple to use other imports to get address of messageboxa, it is also possible to get address without using api's at all.
JoKa 25. Sep 2008	I think the problem is not in InitCommonControls call, but in importing comctl32.dll In original crackme: NOP InitCommonControls call Run. DialogBox appears NOP InitCommonControls call and remove comctl32.dll from Import. Run. DialogBox doesn't appear.
JoKa 25. Sep 2008	I suppose that RT_MANIFEST resource requires something in comctl32.dll (DllMain). 1. Original crackme: DialogBox appears 2. 1 + NOP InitCommonControls call: DialogBox appears 3. 2 + remove comctl32.dll from import: DialogBox doesn't appear (for me) 4. 3 + remove RT_MANIFEST (24) resource: DialogBox appears @Evolution: I removed RT_MANIFEST resource from your patched exe and now it works on my WinXP SP2 too.
ShadowRayzz 25. Sep 2008	I liked it (xm module too :D) the first one was easy and this second one is just a lil harder but still sweet, waiting for the 3rd :D
EvOlUtIoN 26. Sep 2008	I removed comctl32 and dialogbox appears perfectly equal to original.
EvOlUtIoN 26. Sep 2008	i'm on winxp sp2 too
madmaurice 18. Jul 2010	easy. you dont even need to codecave :P
madmaurice 18. Jul 2010	@Joka why using an external library? its much easier @costy it worked for me without an additional import. i just had to assemble an MessageBoxA call and add my title and text.
DJ1hAD0 21. Feb 2013	It's really funny!!! Tnx to Author!!! Also, I add WinExec function from Kernel32.dll in this crackme:) Now the calc.exe starts with injectme:) I think that this small crackme is very useful for my little damaged brain=)

xylitol's XyliCrackMe No. 3

Download XylicrackMe.zip, 29 kb (password: crackmes.de)
Browse contents of XylicrackMe.zip

hello all
i have posted the crackMe here because my crackme is maked in Qbasic and is so funny to crack this langage
patching is authorized

Difficulty: 1 - Very easy, for newbies
Platform: DOS
Language: (Visual) Basic

Published: 02. Oct, 2007
Downloads: 770

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Solutions

Solution by br0ken, published 11. oct, 2007; download (58 kb), password: crackmes.de or browse.

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Discussion and comments

Zaphod 03. Oct 2007	I stumbled over the password and the program says I'm a "Good Cracker!" - but I have no idea how to deal with this crackme in an organized way...
br0ken 03. Oct 2007	Same thing, stumbled upon the hardcoded pass.
TiGa 03. Oct 2007	Your head is the best tool to use every time. ;)
Zaphod 04. Oct 2007	He he, TiGa - sometimes I wish for a better tool :) But perhaps it is necessary to know something about QBasic in this case?
br0ken 04. Oct 2007	Nope... you don't have to know anything about QBasic. You can solve this if you know some hex editing. That's all!
Zaphod 04. Oct 2007	br0ken, do you mean load the crackme in a hex editor and have a look? That is not solving - it wouldn't work if the password wasn't hardcoded. I can't break in the crackme in any way - not even using point H (hmemcpy).
br0ken 04. Oct 2007	It's not the best way, but it is one way of solving, instead of putting BP[s] on API call[s]. As for this CM, the pass is hardcoded, that's why it is a solution [atleast i think it is, i'll leave the mods to decide]. What's wrong in hex editing? Moreover, patching is authorized. So i'm at liberty to do what I want to get the pass. Even if it means hex editing. PS : I used notepad. It's alot easier.
TiGa 04. Oct 2007	Notepad works but what if it didn't? Like any other crackme, it needs to be unpacked then disassembled and/or debugged. QBasic is the free compiler that came with Dos (and gorilla.bas), many many years ago.
Zaphod 04. Oct 2007	br0ken, of course you are free to find the password in any way you choose, but I would like to know how to enter the crackme. There are three threads, the main thread and two others, and one of them must check the arbitrary password I enter and decide if it is correct. But I can't even find my password anywhere in memory at any time. The program is compiled with the ancient QBasic, but still it is a program that can run on todays computers, so it must be possible to get into it, but how? I am rather mystified...
br0ken 04. Oct 2007	Zaphod, Ok, my way is of finding the pass is noobish, but it works. "I am rather mystified..." So am I. I've managed to run it in Olly [raised quite a few exceptions!]. I'm guessing Olly just isn't designed for 16 bit apps ;) And it's packed too? [How do you find out?] This one is harder than I thought. OllyDump and LordPE don't work with 16 bit apps [correct me if i'm wrong]. That having said, I have no idea how to unpack this. Maybe i'll leave this to the experts ;)
TiGa 04. Oct 2007	Before disassembling the program, Ida told me it could be packed. I checked with my 10 year-old packer detector and indeed, it was packed by the compiler itself. It's a Dos crackme BTW. I thought it had been changed in the description.
DigitalAcid 12. Oct 2007	My program said it was packed with E**** 5..*** and unpacked it. Still wondering how we are supposed to solve this without Notepad.
TiGa 13. Oct 2007	Think about the tools that were available 10 or more years ago. Qbasic came included with Dos, so did a debugger.
br0ken 14. Oct 2007	You mean the one that's shipped with Windows. Run--> cmd--> debug proggie.exe?

xylitol's Xyl Crypto-KeygenMe 1: BarbecueMe

Download BarbecueMe_1.zip, 469 kb (password: crackmes.de)
Browse contents of BarbecueMe_1.zip

Hello this is my first crypto KgMe, my code is weak...
But i hope you will enjoy Blowfish.

w34k rulz:
- No Patching
- No self keygenning (Forbidden!)
- Make a Keygen with a cool chiptune
- Write a tutorial and send it
- How to win FreeCell Game #11982 ?

Happy keygening & thanks for attention :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 08. Feb, 2010
Downloads: 767

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Solutions

Solution by Xspider, published 05. feb, 2010; download (69 kb), password: crackmes.de or browse.

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Solution by alex_ls, published 05. feb, 2010; download (57 kb), password: crackmes.de or browse.

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Discussion and comments

smail 29. Jun 2014	Super Keygenme !!! tres jolie

xylitol's Xyl Crypto-KeygenMe 2: rEvErs0rEd

Download Xyl_Crypto-KeygenMe_2_rEvErs0rEd.zip, 3103 kb (password: crackmes.de)
Browse contents of Xyl_Crypto-KeygenMe_2_rEvErs0rEd.zip

Da rulz:
- No Patching
- No self keygenning (Forbidden!)
- Make a Keygen
- Write a tutorial and send it :)

Happy keygening & thanks for attention :)

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 20. May, 2010
Downloads: 1180

Rating

Votes: 8
Crackme is boring.

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Solutions

Solution by Office Jesus, published 20. jul, 2010; download (39 kb), password: crackmes.de or browse.

Office Jesus has rated this crackme as boring.

Solution by KKR_WE_RULE, published 19. may, 2010; download (261 kb), password: crackmes.de or browse.

KKR_WE_RULE has rated this crackme as boring.

Send a message to xZeroBeatx »

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Discussion and comments

tomkol 15. May 2010	Quite nice keygen me. I've liked gfx effects. Solution uploaded.
KKR_WE_RULE 16. May 2010	Ok... Got ya pm.. Submitted my soln. But ya know, I am not a gr8 tut writer, so cant guarantee that it'll get accepted. But c'mon, ya could have done something more to the kgm to make it a challenge.
Xspider 20. May 2010	@KKR: nice solution :) but you was wrong in this: "But Base64 signatures are there because of the ExeCryptor." the execryptor is just a fake signature you can look at ap0x's website ;) it have no relationship with base64 :p link: _http://ap0x.jezgra.net/protectionLab/AntiPeID-ExeCryptor.rar
KKR_WE_RULE 20. May 2010	lol.. I came to that conclusion as the Base64 wasn't used anywhere in the algo. I didn't really do a research on the execryptor :p but realised that it was fake as had it not been so, it would have been a pain in the butt to reverse it in olly, without unpacking it :p
Office Jesus 12. Jul 2010	I'm late to the party, but this is the first BigNum keygenme I've solved. Thanks for the challenge, Xyl.
KKR_WE_RULE 12. Jul 2010	did ya submit a soln ? Congratz man :)
Office Jesus 12. Jul 2010	I'm waiting for mods to review it, but I can understand if they trash it. It was a very hastily written tutorial. Thanks.
KKR_WE_RULE 12. Jul 2010	I believe it will be accepted :)

Jim~ 21. May 2008	The wall of fame page is 'under development'? haha. Nice easy crackme :)
MACH4 21. May 2008	Yep easy, but a nice one!
xZeroBeatx Author 21. May 2008	hehe sorry, just oploaded, and haven't had time to finish that... will come within the next few days
Laurance_1111 27. May 2008	Jim~, thanks for your solution. But I don't know how to save the patched exe. Is there any plugins to add in NET Reflector to accomplish the save function?
obnoxious 27. May 2008	@Laurance_1111 to save the patched exe just browse to the begining of the expansion n select the crackme. reflexil will automatically show the save file dialog

xZeroBeatx's Simple CrackME 2

Download CrackMe2.zip, 135 kb (password: crackmes.de)
Browse contents of CrackMe2.zip

Well this is a little bit more difficult then the first "Simple CrackME".
this one does not use a serial key but a signature file.
So it's your job to create a application that can take a username and generate a correct signature file.

Also tutorials would be great ;)

- Have fun, xZeroBeatx

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: .NET

Published: 21. May, 2008
Downloads: 519

Rating

Votes: 3
Crackme is boring crap.

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Solutions

Solution by Jim~, published 26. may, 2008; download (164 kb), password: crackmes.de or browse.

Jim~ has rated this crackme as boring crap.

Discussion and comments

Jim~ 21. May 2008	Another nice easy crackme :) Solution submitted.

XzzX's XzzX#CrackMe1

Download XzzX-CrackMe1.zip, 2 kb (password: crackmes.de)
Browse contents of XzzX-CrackMe1.zip

*******************************************
************** XzzX#CrackMe1 **************
*******************************************

author : XzzX
created : 26/05/2007
language : Assembler / MASM

difficulty: 3/10
goal : write a keygen
rules : no patching - far too easy ;-)

info : no packer
no anti-debugging tricks

This is my first CrackMe but I think it's quite hard for a beginner to solve. ;-)

gl&hf

seeing forward for your solutions ^^

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 26. May, 2007
Downloads: 728

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Solutions

Solution by frugurt, published 03. aug, 2007; download (17 kb), password: crackmes.de or browse.

frugurt has rated this crackme as quite nice.

Solution by TiGa, published 01. jun, 2007; download (38 kb), password: crackmes.de or browse.

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Solution by red477, published 01. jun, 2007; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

red477 27. May 2007	Interesting and easy:D
XzzX Author 28. May 2007	write a solution or at least send me a pm with your name and serial ;-)
fjlj 28. May 2007	hmmm i dont want to give anything away but from what i can see this crackme cannot be solved. with making a keygen because the end compare is eax to a value that i will not state here. but the reason this value cannot ever be met is because it is obtained through an AND of a value that could never become that value no matter how hard you try. EG. lets say the key is AB in binary that is 10101011 and your keys "value" is ANDed with 11110101 well lets try to figure out what value we need to put in to get the key. ok OUR 1010?0?1 AND 11110101 ---------------- KEY 10101011 the question marks are their because we need a 1 in the end but we donot have the needed 1 in the and. so please let me know if i am just stupid and explain to me how that could be obtained or lemme know that i am correct. because i am pretty damn confused Thanks
XzzX Author 28. May 2007	you are fully right. but it isn't a bug. try searching deeper. ;-) Info: Every name has a UNIQUE serial.
Dis@sm 28. May 2007	Sorry for my poor promt translation :) -- I doubt that the checking algorithm number two has the decision for each name. But there are decisions for all names beginning a symbol 0xe8. Whether tell, please, there is a decision for name Disasm90
XzzX Author 28. May 2007	I'm not sure, if I fully understood you. My KeyGen gives a valid solution for "Disasm90", if you mean this. I don't know what you want to say with: >But there are decisions for all names beginning a symbol 0xe8
XzzX Author 28. May 2007	Sorry Dis@sm I had to remove your post because this is almost the solution and it would take all the fun away. I'll repost it when it is solved. I think you know how ss,sx are generated. So just think about some maths. There is a much easier solution. Send me you name/serial when you know it. 5 to 12 ;-)
XzzX Author 02. Jun 2007	Original post of Dis@sm: >Thank you. >All names beginning with char 0xe8 have solutions like ><empty line>, 0, 0-0, 00-0, 0-00, ..... >In this case the login string will be empty >I can get solution using code like that: (pascal) >for i:=0 to 2^32-1 do >for j:=0 to 2^32-1 do >begin >if(ss<>(i$40+j$c3)) then continue; >if(sx<>(i$55+j$103)) then continue; >solution:=IntToHex(i,4)+'-'+IntToHex(j,4); >break; >end; >but this would take a very long time >I will try to get another way to solve it. >Thank you for your work!
ticoso08 26. Feb 2008	Man, Congratulations. I love this Crackme1. It´s Very nice and clever. I couldn´t solve the crackme1 alone but it gave me a lot of new info and knowledge. Special thanks to the autor and Tiga, who makes a spectacular Solution crackme2,3,4 here I go!!!
hound 26. Feb 2008	Cool crackme. Quite easy, but good fun.

XzzX's XzzX#CrackMe2

Download XzzX-CrackMe2.zip, 3 kb (password: crackmes.de)
Browse contents of XzzX-CrackMe2.zip

*******************************************
************** XzzX#CrackMe2 **************
*******************************************

author : XzzX
created : 02/06/2007
language : Assembler / MASM

difficulty: 4/10
goal : write a keygen (has to work with patched and unpatched CrackMe)
patch the advertisement (find a short solution) ;-)
don't patch anything else :-D

info : no fake code
straight algo
fpu knowledge could be usefull ;-)

I know I could have made it harder but my goal was to make an interesting CrackMe not an impossible one.

If you encounter a problem/bug/question/etc feel free to write a comment or send me a pm.

Please send me your solution when you've solved it. ;-) (email in profile)

It is harder than my first one!

gl&hf
XzzX

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 05. Jun, 2007
Downloads: 485

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by red477, published 07. jun, 2007; download (11 kb), password: crackmes.de or browse.

red477 has not rated this crackme yet.

Discussion and comments

red477 06. Jun 2007	Nice crackme;) I found a name/serial combination...will try to write a keygen soon..
XzzX Author 06. Jun 2007	I don't like you. You're too fast. ;-) Send me your keygen as soon as you have one. Have you already patched the ad?
Dis@sm 11. Jun 2007	We have so different FPUs?? For name="Disasm90" It must be 0xd4581896 in [0x004046c5] before decryption stage 3 before command FISTP [0x004046c5] i have 0xd4581896 in decimal in the top of my FPU but after it.. [0x004046c5]=0x80000000 any other FISTP command works correcttly
red477 11. Jun 2007	0xd4581896 is a negative number, it is -732424042 in decimal, but not 3562543254. try it;) ////////////////////////////////////////////// From Intel's Instruction Set Reference: The FIST instruction converts the value in the ST(0) register to a __signed__ integer and stores the result in the destination operand.
XzzX Author 11. Jun 2007	I struggled at exactly the same problem when I tested my crackme and tried to find a key for myself. ;-) But I thought that this is a nice trap so I didn't remove it. :-D

XzzX's XzzX#CrackMe3

Download XzzX-CrackMe3.zip, 3 kb (password: crackmes.de)
Browse contents of XzzX-CrackMe3.zip

*******************************************
************** XzzX#CrackMe3 **************
*******************************************

author:
XzzX
created:
30/07/2007
language:
Assembler / MASM

difficulty:
2/10

goal:

gold:
write a keygen
silver:
find a serial for your name
bronze:
patch it :-(

additional point:
How is the algo called?

rules:
for a solution you have to do it the gold way ;-)

info:
no anti-debugging tricks
no packer

Don't cheat! ;-)

If you encounter a problem/bug/question/etc feel free to write a comment or send me a pm.

Please send me your solution when you've solved it. ;-)

gl&hf
XzzX

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 04. Jul, 2007
Downloads: 1087

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by frugurt, published 30. jul, 2007; download (200 kb), password: crackmes.de or browse.

frugurt has rated this crackme as quite nice.

Solution by TiGa, published 27. jul, 2007; download (35 kb), password: crackmes.de or browse.

TiGa has not rated this crackme yet.

Discussion and comments

XzzX Author 04. Jul 2007	crackme is solved when it says "Registered to: <your name>" could be a little bit confusing without this information
red477 04. Jul 2007	Much easier than your previous 2 crackme;)
XzzX Author 04. Jul 2007	I know i just wanted to try out the algo. There will be a harder one soon. ;-)
KernelJ 21. Jul 2007	Haven't solved it yet, but at least I know where the decryption takes place :P Although still a little confused... "Registered to: RkiN8aqp" lol I think I may have done something wrong there...
KernelJ 21. Jul 2007	Apparently your name isn't allowed to be shorter than 8 letters... What if your name is real short and you don't have any middle names? Joe Cox of joecox.com will not be happy about this!
XzzX Author 22. Jul 2007	Have you ever thought of spaces?
KernelJ 22. Jul 2007	Yes, but probably not in the way you're thinking of. In fact, if you were intending on padding the name with spaces anyway, why on earth didn't you implement that into your program instead of just rejecting it? Anyway, my keygen is done. Just need to upload...
XzzX Author 22. Jul 2007	I think the name is irrelevant for crackmes. I just want to get some startup information for my algo. In a real protection I could use something different.

XzzX's XzzX#CrackMe4

Download XzzX-CrackMe4.zip, 52 kb (password: crackmes.de)
Browse contents of XzzX-CrackMe4.zip

*******************************************
************** XzzX#CrackMe4 **************
*******************************************

author : XzzX
created : 11/07/2007
language : Assembler / MASM

difficulty: 5/10

goal : write a keygen, which works for EVERY name

rules : absolutly no patching ;-)

info : CrackMe is solvable ;-)

You have to solve a first problem to get the CrackMe running!!!

If you encounter a problem/bug/question/etc feel free to write a comment or send me a pm.

Please send me your solution when you've solved it. ;-)

Tested under WinXP SP2 but it should work with every windows.

gl&hf
XzzX

Music : "Sun Symbolizing Song" by nitzer

Difficulty: 5 - Professional problem to solve
Platform: Windows
Language: Assembler

Published: 27. Jul, 2007
Downloads: 638

Rating

Votes: 5
Crackme is quite nice.

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Solutions

Solution by alex_ls, published 08. sep, 2007; download (104 kb), password: crackmes.de or browse.

alex_ls has rated this crackme as quite nice.

Solution by red477, published 08. sep, 2007; download (25 kb), password: crackmes.de or browse.

red477 has rated this crackme as awesome.

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Discussion and comments

cobrasniper555 28. Jul 2007	I've got the key.dat down, and the md5 usage. Now I just need to figure out the rest of the algorithm. If I was wrong about something, it would be that there is no md5 implementation in this crackme, but PeID showed me in KryptoAnalyzer. How much on track am I?
XzzX Author 28. Jul 2007	If you get the crackme running you solved the first stage. @md5: I don't know. ;-)
HMX0101 28. Jul 2007	Its really solvable? ((a xor 0xAB459D9A)0xA647) + ((b xor 0x3FB5988A)0x22CF6) + ((c xor 0xABBBAA9A)0x1074 + (d xor 0x2BE59D46)0x17293 = Sum name chars This can't return a value lower than 0x0FFFFFFF, so its a trick or a bug? I hope you think its first one ;)
MR.HAANDI 28. Jul 2007	Indeed it can, because the eax is used after imul. E.g. 0xA647 imul 0xFD12377 = 0x00000001. But I don't know whether it is planned or the author just typed in some random values, but 0x6FBD6=457686 and it is even, which is bad for the finite field linear system!
TiGa 28. Jul 2007	Since when can you solve a 4x4 matrix system like this using only integers?
KernelJ 28. Jul 2007	I haven't tried this crackme yet, but surely there would be a fair number of solutions to that equation. Or are there limits on a, b, c, d?
cobrasniper555 28. Jul 2007	I've solved it, and I think it isn't really a 5 on the scale. I'm making a tutorial right now, I have a keygen and everything if you want it, XzzX. Thanks for the crackme.
Haykuro 28. Jul 2007	blah i need a little help, i figured out how to pass the check for the comparison text on the file, but when it does the second or check on ebx, it sais its wrong... helppp?
MR.HAANDI 28. Jul 2007	Check out the GetFileAttributesA API which is called shortly before.
TiGa 28. Jul 2007	@cobrasniper555: Did you get the GoodBoy MessageBox or the "Registered to: Name" message?
TiGa 28. Jul 2007	I think it could spawn a philosophical discussion: If a fake algo is solvable, is it still called a fake algo? ;)
Haykuro 28. Jul 2007	YAY! solved the keyfile check routine, i was missing 1 attribute :P
MR.HAANDI 28. Jul 2007	NOOOOOO! Since hours I reverse the finite field linear system and this is supposed to be the fake algo??? Hey but I still got a "Congratulation! You solved it!" for some names, but not for all.
TiGa 28. Jul 2007	From the description above: goal : write a keygen, which works for EVERY name info : CrackMe is solvable ;-)
TiGa 28. Jul 2007	When i solved the matrix for my name, the answers weren't integers. So I started looking elsewhere.
Haykuro 28. Jul 2007	BLAH fake algo?!?!!? arggghh!! i wasnt paying attention to comments and i was going insane trying to figure out why i wasnt getting registered message.
Ox87k 28. Jul 2007	I don't see this keygenme 'coz i've no time now but reading the comments: E.g. 0xA647 imul 0xFD12377 = 0x00000001. This part seems to be like Euler'stotient function ;)
red477 29. Jul 2007	working on it;) and yes, the real algo is so deep inside:D
XzzX Author 29. Jul 2007	i wasn't online for one day. sorry. i never had so much comments on one of my crackmes. as you found out the equation system is fake. the main factor matrix is very big number. to get a solution for every name it has to be 1 - obviously not the case. i tried to make this clear by stating "EVERY name" but perhaps i should have made it clearer. as TiGa already said for a proper solution you need to get the "Registered to: <name>" message. @cobrasniper555: send me your solution for two names and i'll believe you. @MR.HAANDI: you got some working names/serials? i thought it would be only possible for some strange ones. please send them to me. @all comments: sorry for my late answer have a good day XzzX
MR.HAANDI 29. Jul 2007	Today I let your crackme's fake algo inpire my for my own keygenme (which is not that easy to solve btw). It should appear soon on crackmes.de ;) And that is one of the reasons why I can't tell you some working combinations for the fake algo. But still a hint: How do you solve a 4x4 system? You divide the coefficents, so they become 1. What if you could multiply the coefficents like e.g. 0xA647 imul 0xFD12377 = 0x00000001, so they become 1 without making the system inconsistent.
XzzX Author 31. Jul 2007	I thought about the "fake" equation system. Perhaps it is really solvable with integer overflows. I didn't think that far. I just thought almost all results will be floating-point numbers -> not solvable. What do you think? @MR.HAANDI: how did you find 0xA647? I don't have much experience with mod operations.
MR.HAANDI 31. Jul 2007	Talking about this weakens my first crackme protection. Nevertheless here is a full explanation: en.wikipedia.org/wiki/Modular_multiplicative_inverse.
KernelJ 02. Aug 2007	Still no solutions for this??
TiGa 02. Aug 2007	@KernelJ: Still no solution for this??
XzzX Author 02. Aug 2007	perhaps it is too hard ;-) in the end I have to write a solution myself ...
cobrasniper555 07. Aug 2007	I swear I'm so close to finishing this...
KernelJ 07. Aug 2007	@Tiga: I never started doing this one. I was too busy doing MyVM#1. @XzzX: ditto what you said... lol
XzzX Author 14. Aug 2007	Is anyone still trying to solve it?
cobrasniper555 16. Aug 2007	Ya, I found the real encryption algo, how it appears before use and "disappears" after use. Use lazy to reverse the floating point instructions though...
leotr 17. Aug 2007	XzzX, do you still evaluate difficulty of this crackme as 3
XzzX Author 17. Aug 2007	3? It is rated 5. I think 5 or perhaps 6 is correct. But I didn't want to overrate it as I did with my first one. ;-) @cobrasniper555: I'm waiting for a solution. ;-)
cobrasniper555 18. Aug 2007	Lol, XzzX, this algo man...you're something else.
XzzX Author 20. Aug 2007	It isn't as hard as it looks like. ;-) 11/16 are easy. The rest is a little bit more complicated. :-D
alex_ls 07. Sep 2007	Has anybody solved this crackme already? I've coded keygen that works for every name with the EVEN length. The system has collisions with overflows when the right part of equation (vector b) consists in the convergence parity of the numbers (b1-even,b2-odd,b3-even,b4-even)(Sum of evens doesn't equal sum of odds) In my case the system is solvable when the evens equal odds of the vecor B numbers, So If it's not so, I just added the space (0x20) to the end of the name and system is getting solvable! I wanted to write a solution but I may wrong with this conclusions. XzzX: give some info about this stuff please.
XzzX Author 07. Sep 2007	Sorry I can't follow you. I'm not a native speaker. Please leave me a more detailed pm. ;-) I'm interested in your solution. But I think you're talking about the "fake"-algo. I didn't think about these overflows by the time of writing this crackme. I should spend more time in writing my fake algos. ;-) I'll accept a solution for the "fake" algo aswell. Although you miss the real fun. ;-) A solution covering both would be really nice. But I'm not sure if the "fake" algo can be solved. lack of maths ;-)
alex_ls 08. Sep 2007	XzzX: Ok! I'll try to write a solution.
red477 08. Sep 2007	alex_ls, wow, interesting solution. I like it. Absolutely another way. @XzzX, I forgot to mention the OutputDebugStringA, because I changed the entry point before analysis. And the "Sun Symbolizing Song" is so nice that I enjoyed it for a whole night;)
XzzX Author 09. Sep 2007	Congratulation to both authors. I got to different solutions for one crackme. ;-) @alex_ls: I'll study your solution since I don't know how to solve it. @read477: Nice solution - everything mentioned. Unfortunately I found a bug in my "real" algo. If you input a name which xor-sum is 0 you get an unhandled fpu-div0-error which makes it unsolvable. :-( But since it would make your keygen not working anymore I won't patch it. You can simply circumvent it by adding one more space. Solved after one month -> next target two months ;-)
alex_ls 09. Sep 2007	@XzzX:I have fallen in your trap with the fake algo 2-3 weeks ago, but after working with Solvet1 by MR.HAANDI I had an idea how to perform the system without the modular arythmetic. Well, I returned to this task. (the real algo I've not figured out yet. ) Very good job man! @Red477: Thanks for the real algo solution, I just now understood the whole idea of this crackme:)

X-Treem's Communicate 1.0

Download Communicate1_0.zip, 3 kb (password: crackmes.de)
Browse contents of Communicate1_0.zip

The target is keygening it or at least find out a working username and password. It requires some communication knowledge and a little bit of fantasy to workout...uhm..how can we call it?...ah yes!!..a key. Or shall we say..The Key.

Happy brainstorming :)

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 17. Jul, 2006
Downloads: 648

Rating

Votes: 10
Crackme is nothing special.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

red477 18. Jul 2006	Nice crackme...;)
EvOlUtIoN 18. Jul 2006	Very difficult... any solution?
BoR0 19. Jul 2006	I doubt this crackme is keygenable. It may contain just one valid key and one valid user I think. The main thing is, we have a 73-byte key (which is kind of a code cave). Now our username and password (xored and all that stuff by that nasty algorithm) should make the code cave return 0x180C in sum, AS WELL AS making the code-cave a bunch of set of instructions, which in my opinion is kind of impossible. I didn't find a message saying "Good job", or etc. So this means that we have to write ourself a code that does it all for us (in only 73 bytes)? I kindly ask the author to send me a message (hint me?) about this crackme.
X-Treem Author 19. Jul 2006	if u dont know how to afford a simple cryptoanalysis stop trying with this keygenme. There was an old Spider crackme called Christmas that used same way protection and that one has been soluted this means it's not impossible. A xor B = C that means that any combination of A and B that gives out C are good. C is you cave and this means that not only 1 username and password are correct. 73bytes are enough for doing almost everything. The fact you cant find any good job message doesnt mean there is not.
hardcoder 22. Jul 2006	This crackme should be rated more than 6, to hard to figure out what's happening, anybody out there for solution
zairon Moderator 22. Jul 2006	Where are you stuck? What's the part you think it's hard? I think it's not so hard but if you guys have some problems I can think to raise the level up; I have only to know which are the problems :)
crp- 23. Jul 2006	finding out whats happening is actually pretty straight forward. 0x49 bytes of ciphertext with an unknown 0xE byte key and an almost unknown plaintext is a bit more challenging :)
LAS3R 24. Jul 2006	agree with zairon, it's not that hard, xor algo, seen worse, i would rate it 3-4 , but very entertaining crackme, ideas i never thougth of! Nice work!
ultrasound 24. Jul 2006	i am stuck with same thing as you BoR0.. it seems if the 'sum(XORed_magic_bytes)!=0x180C' then the instruction 'retn' is written to pipefile and executed, else the 'XORed_magic_bytes' are executed themselves (as they are written to the pipefile before the XOR is reversed)... As BoR0 said, are we supposed to XOR this code until it is some valid code??
nasa_t 25. Jul 2006	Here,i have same problem with BoR0,ultrasound.It is easy to find how to make the crackme show you the encrypted good_boy message. I use general instructions such as:push ebp/mov ebp,esp at the beginning,and leave/retn 4 at the end to make the cryptoanalysis easier.But these instructions crashes themselves,coz the push ebp/mov ebp and leave/retn 4 should have indistinct xor key. After all,if we only ontain just several certain xor key,the job will be much more interesting.But I can't guess the tricky behind,and bruteforce would be impossible. Guys like LAS3R,if you find the backdoor or trick,please write tut,and we will appreciate you and X-Treem. BTW:data at 004030B6 may be C2 04 00,not C2 00 04,otherwise it will crash after input 0xE bytes name and serial. :)
Isaiah 25. Jul 2006	I think the key like this ?? ?? ?? ?? ?? 7A EF ?? ?? 2D 98 D4 6B
Isaiah 25. Jul 2006	I suppose the 73 bytes code begin with push ebp mov ebp,esp and end with: leave retn 4 I spend 10 hours to bruteforce the KEY.But False
crp- 25. Jul 2006	> suppose the 73 bytes code begin with > push ebp > mov ebp,esp > and end with: > leave > retn 4 this is not possible since 0x5A ^ 0x00 != 0xC3
crp- 25. Jul 2006	oops.... 0x5A ^ 0x00 != 0xC2 of course
Isaiah 25. Jul 2006	oh~.I'm wrong~~. is anybody find the Key?
BoR0 27. Jul 2006	I passed the 180Ch sum check, hehe. But the program crashes now ;) szUser db "BoR0 loves you", 0 szPassword db 0F1h, 0BBh, 0A7h, 26h, 17h, 34h, 16h, 0ECh, 0DEh, 0AFh, 0DDh, 067h, 8Bh, 70h, 0 For full bruteforce code check out http://www.cyberspace.org/~tehmath/communicate.brute.asm
crp- 27. Jul 2006	you found just 1 of billions of keys that yiels to correct checksum. i think the correct way to solve this is to "guess" some code bytes right, and work from that, however that might take a long time...
Isaiah 27. Jul 2006	the each byte of the KEY must between 0 to 0x7F
crp- 27. Jul 2006	there seem to be no keys that consist only of 00-7F bytes and produce a correct checksum
Isaiah 27. Jul 2006	oh,but the key generate by XOR opration between name and password.so the each byte of KEY must between 0x7F. I get some hint from author he say the plaintext like this: .Code ... ret 4 szGoodjobMsg db dup(?)
crp- 27. Jul 2006	> oh,but the key generate by XOR opration between name and > password.so the each byte of KEY must between 0x7F. hmm, only if name and password also only consist of 0x00-0x7F
X-Treem Author 27. Jul 2006	as i told in pm to someone else... Isaiah assumption are right and the code is really simple so assuming first three bytes of code (means last three bytes of the key) is really simple, i can suggest MB_OK maybe someone understand with the last three bytes of key then is simple to find text and rest of key.
crp- 27. Jul 2006	if Isaiah assumptions are right then its impossible to solve as there are no keys (with every byte in the 0-0x7F range) that produce plaintext with a checksum of 0x180C.
Isaiah 28. Jul 2006	The first byte of code isn't decrypted by the last three byte of Key.It's decrypted by the sixth,seventh and eighth byte of the Key
crp- 28. Jul 2006	> It's decrypted by the sixth,seventh and eighth byte of the Key are we trying to solve different crackmes ? ;)
BoR0 29. Jul 2006	This might come handy. #include <stdio.h> int main() { int k,x; for (x=13,k=72;k>=0;k--,x--) { if (x<0) x=13; printf("key[%d] = szuser[%d] ^ szpass[%d]\n", k, x, x); } return 0; }
Isaiah 29. Jul 2006	I made a mistake~.I thought the key length is 13,but it's 14
ultrasound 29. Jul 2006	the problem i am having with this is that you cant assume the last byte of the code is the last byte that will be executed.. the 'retn 4' mnemonic could be anywhere in the bytes, not specifically 70->73.. the only thing you can be sure of is that it starts at the start, which you would assume, as above, starts with: push ebp mov ebp, esp but the hex for this is 55, 8B, EC, which would require the last three bytes of the key to be 00, 7A, EF.. but as Isaiah has said, you cant produce EF by XORing characters (normal characters) which would be your name/serial... so if this isnt the starting code, then what could it be !!?
BoR0 29. Jul 2006	This type of code/encryption is very useful, and can save lots of needed information. Hmm... maybe I will write a file encrypter soon..
X-Treem Author 29. Jul 2006	lol ok ok my mistake :) i was taloking about Isaiah assumption about code (kindly hinted). dont pay attention that serial will never be a text string, there could be any char from 0 to 255, the routine is really a shit, the keygenme goal is to let you crack you brain to find how serial and pass are checked and find out encripted "good job" routine code. So do not focalize on how could be serial appearance.
jE! 29. Jul 2006	hey, author, as i understood, in PASSWORD box we need to put non english letters?? if so, then this is incorrect crackme IMHO
LAS3R 30. Jul 2006	jE! a hint "copy and paste" ;)
BoR0 30. Jul 2006	This one is really nice, but still I doubt it's a keygenme. More like a crackme.
X-Treem Author 30. Jul 2006	lol it's a keygenme :) hard thing is finding key, not algo :) crackmes.de moderator has been given a valid username and serial to test functionality. LAS3R is right, copy and paste :) so stop crying about appearance, apply on method.
jE! 30. Jul 2006	it is incorrect:) :)from where copy?? in edit box expected to put printable inglizh chars 20h-7Fh; Otherwise use HEX input, then convert... so is in all normal crackmes, if you look..
X-Treem Author 31. Jul 2006	... i repeat, if you are able find the Key used to encrypt code using brain well,otherwise do not try.
ixiodor 27. Dec 2010	Dear Friends,after 8 hour i have cracked this crackme ^^ It's really simple guys! Tomorrow i make a tutorial.
ixiodor 27. Dec 2010	P.S no Needs special knowledge. Only a low level programmation skill (XOR Foundament) and brain.(I coded 2 programs for do this).
ixiodor 04. Jan 2011	Solution (Italian): http://quequero.org/Soluzione_Communicate_1.0
X-Treem Author 05. Jan 2011	I checked it and this was the solution i was expecting. Great job ixiodor

X-Treem's Grinder 1.0

Download Grinder_1_0.zip, 5 kb (password: crackmes.de)
Browse contents of Grinder_1_0.zip

It needs some knowledge, and please dont swear too much because this crackme will make you go really crazy if you dont know uhm Windows features :)

Scope: patch

if you like: keygen

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Assembler

Published: 06. Aug, 2006
Downloads: 608

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by red477, published 11. aug, 2006; download (15 kb), password: crackmes.de or browse.

red477 has not rated this crackme yet.

Solution by deroko, published 11. aug, 2006; download (10 kb), password: crackmes.de or browse.

deroko has rated this crackme as quite nice.

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Discussion and comments

red477 08. Aug 2006	Though i am not able to get to the very kernel till now, I think it is really a nice one.
deroko 08. Aug 2006	so accepted solution is patch? I got it patched :P
deroko 08. Aug 2006	forgot to say, very good crackme, interesting and enjoyable.
red477 10. Aug 2006	@Author, I think there is something wrong with the keygen routine, here: 004014E0 > 803C31 30 CMP BYTE PTR DS:[ECX+ESI],30 004014E4 . 72 0C JB SHORT grinder.004014F2 004014E6 . 803C31 39 CMP BYTE PTR DS:[ECX+ESI],39 004014EA . 77 06 JA SHORT grinder.004014F2 004014EC . 802C31 1E SUB BYTE PTR DS:[ECX+ESI],1E I think there should be another instruction here: SHR BYTE PTR DS:[ECX+ESI],1 btw: Nice crackme, and after being confirmed about my doubt, I may submit my patch solution and probably a keygen.
X-Treem Author 14. Aug 2006	thx men for the time you spent :) Great Deroko solved my crackme. This is a pleasure for me :)
deroko 14. Aug 2006	tnx man, pleasure is all mine =)
Newbie_Cracker 05. Sep 2006	we have another way to disable thread, instead of noppind CreateThread or patching jumps: 1- Patching thread code to "RETN 04" at 00401819 2- Patching thread CreationFlags to "Create_Suspended" at 004012F9, PUSH 0 -> 04

yado's krypton #1

Download yado_krypton1.zip, 4 kb (password: crackmes.de)
Browse contents of yado_krypton1.zip

keyfile, some tricks

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 09. Jul, 2000
Downloads: 1842

Rating

Waiting for at least 3 votes
(we have only 1).

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Solutions

Solution by nh, published 09. jul, 2000; download (3 kb), password: crackmes.de or browse.

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yanisto's Naive_crackme

Download naive-crk.gz, 2 kb

Here is my first linux ELF crackme...
Not very hard to solve but not for tyros either...

Solution will be published later on nuxed.org.

Enjoy ! ++nisto

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 31. Aug, 2004
Downloads: 1392

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by xi-, published 11. oct, 2004; download (3 kb), password: crackmes.de or browse.

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Solution by kRio, published 09. sep, 2004; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

lagalopex 17. Apr 2007	lagalopex@amd64 $ ./naive-crk Segmentation fault
packz 25. May 2012	for some reason you have to patch at 0x80483c9 with a NOP in order to make this work

yanisto's Tiny Crackme

Download tiny-crackme.gz, 769 b

This is my second linux crackme.

It has a very small size (<400 bytes of bytecode) but implements a few tricks all the same :

- Elf headers corrupted,
- "Cyphered" binary,
- CRC checking,
- Anti ptrace,
- Anti gdb.

Solution will be published later on nuxed.org.

Enjoy it !

++nisto.

Difficulty: 3 - Getting harder
Platform: Unix/linux etc.
Language: Assembler

Published: 31. Aug, 2004
Downloads: 2195

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by tiocsti, published 16. sep, 2004; download (5 kb), password: crackmes.de or browse.

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Solution by kRio, published 12. sep, 2004; download (11 kb), password: crackmes.de or browse.

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[yates]'s pe pro 2.0 crackme

Download yat_cm1.zip, 487 kb (password: crackmes.de)
Browse contents of yat_cm1.zip

pe encryption

Difficulty: 8 - *VERY VERY* hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jun, 2000
Downloads: 2881

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Solutions

Solution by megamen, published 11. jun, 2000; download (4 kb), password: crackmes.de or browse.

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Solution by cronos, published 11. jun, 2000; download (4 kb), password: crackmes.de or browse.

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Solution by f0dder, published 11. jun, 2000; download (12 kb), password: crackmes.de or browse.

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Solution by halsten, published 09. aug, 2007; download (109 kb), password: crackmes.de or browse.

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Discussion and comments

saitob 03. Aug 2007	Nice KeyGenMe +YGT, it's solved and a solution will be submited soon! :D
+YGT Author 03. Aug 2007	;) Cool! Congratulations saitob. I'm waiting your solution impatiently.
saitob 03. Aug 2007	There the solution is submited. Now it's the waiting part:P
+YGT Author 03. Aug 2007	Yeah, we can waiting. So, do you agree with me to difficulty of my algorithm of "2 - Needs a little brain" or it must be less then difficulty of 2 ? :)
halsten 03. Aug 2007	I would say 0 is more correct.
+YGT Author 03. Aug 2007	halsen, I think you were solve it. paste your solution please. Why you're getting 0. I also said "Solving very easy!" and I didn't pack it, also allowing .NET Decompilers. So that needs a little brain to solving algorithm. It's only that.
saitob 03. Aug 2007	It's a nice algorithm +YGT, and if you made the crackme in, let's say C++, I think it would be a 2 or 3.
+YGT Author 03. Aug 2007	Yeah, you right saitob.
bLaCk-eye Moderator 05. Aug 2007	Solution will be aproved in a few days, to give everybody the chance to solve it ;)
Little_Brother 17. Sep 2007	Not a bad one. I created a keygen and tutorial so solution is pending. As far as making it more difficult in .NET I can say that when you start adding references that have to be added it makes it a bit tougher (Like the GetVolumeSerialNumber). Also putting your code in external modules and the least amount possible in the btn's click event make it harder as well. Just a suggestion. :)
br0ken 17. Sep 2007	I had no idea Reflector would make .NET CMs this easy...
saitob 17. Sep 2007	Wonder what in the hell microsoft thought about when they developed the dot net framework... Who will ever develope something in a language that is that unsecure =/
boonz 18. Sep 2007	Someone who realizes that commercial software is doomed?

yoda's lame crackme

Download crkme1_y.zip, 78 kb (password: crackmes.de)
Browse contents of crkme1_y.zip

name/serial (delphi)

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Borland Delphi

Published: 09. May, 2000
Downloads: 1803

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Solutions

Solution by roy, published 09. may, 2000; download (1 kb), password: crackmes.de or browse.

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Yowmo's Yowmo Keygenme#1

Download KeyGenMe.zip, 4 kb (password: crackmes.de)
Browse contents of KeyGenMe.zip

No Patch
No Bruteforce
Make a keygen to level I and level II

Good luck :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 22. Mar, 2009
Downloads: 481

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by kilobyte.asm, published 20. jul, 2009; download (45 kb), password: crackmes.de or browse.

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Discussion and comments

boon 22. Mar 2009	Nice crackme , Level 1 was quite easy , but I'm still trying to wrap my head around the 2nd one.
T.0.R.N.A.D.0. 23. Mar 2009	Yes, Level 1 was too easy, straight-forward. In Level2, there are 5 checks and the serial must satisfy them all. I'm still struggling to solve Level 2.
indomit 23. Mar 2009	Solved :) Nice crackme, man. But again I see that serial depend on name's last char and it's length only (and about comp name the same). Thus the names like "misteR", "butteR", "12345R" has the same serials. May be this is a mistake?
indomit 23. Mar 2009	In your hash(name) functions you calculate sum in EBX, but function returns EAX, that store "hash" only from last char :)
kilobyte.asm 19. Jul 2009	I've submitted a solution + keygen + source code, hope it helps anybody struggling with it

yoyo_lele's idioma

Download yoyolele_crk.zip, 1 kb (password: crackmes.de)
Browse contents of yoyolele_crk.zip

my first crackme - enjoy!

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 02. Oct, 2002
Downloads: 586

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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yo-mismo's CrackMe V1

Download CrackMe_V1_ASM_-_Yo-Mismo.zip, 6 kb (password: crackmes.de)
Browse contents of CrackMe_V1_ASM_-_Yo-Mismo.zip

Simple spanish crackme written in NASM.

About:
Language: NASM
Difficulty: 1 / 10 - Just started (Newbies only)
Packed: Yes, UPX.
Password Source: Serial valid for user Alguien.
Objective: Keygen and tutorial.

Rules:
-No SelfKeygen
-No patch
-Unpack
-Valid Keygen
-Enjoy it

Have a nice day

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Assembler

Published: 12. Apr, 2011
Downloads: 1374

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by nu.orpse, published 28. apr, 2011; download (9 kb), password: crackmes.de or browse.

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Solution by elicn, published 28. apr, 2011; download (2 kb), password: crackmes.de or browse.

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Solution by gehstock, published 08. feb, 2012; download (846 kb), password: crackmes.de or browse.

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Discussion and comments

Mayhem 12. Apr 2011	"Packed: Yes, UPX." "Can I pack/protect my Crackme with a commercial protector even if it is free? No. The only packers/protectors allowed are those that you wrote yourself." Is this rule even enforced anymore? Kinda answered my own question there but w/e.
Mayhem 12. Apr 2011	Disregard my previous comment, I see the exe in the zip isn't packed.
Xspider 14. Apr 2011	something either it's a bug or something else i don't wanna say ^^ at 00401317 you did a CMP ECX,4 that means that the length of calculated serial should be 4 and then after the end of that loop, you did a lstrlen so that we already know that the length of calculated serial is 4!! you've wasted three lines x)
Xspider 14. Apr 2011	okey your crackme is buggy!! i entered serial for Alguien which is Alguien3891878852 but wasn't accepted in the crackme, but in the source.rar it was accepted..
yo-mismo Author 14. Apr 2011	Is not a bug, only 4 first bytes are calculated... I don't know what is the problem with the user Alguien, but there is a bug... Well done, gehstock!
snq- 15. Apr 2011	>> I don't know what is the problem with the user Alguien buffer size: 16 versus 7 ("Alguien") + 10 (the decimal string representation of the calculated checksum 0xE7F95BC4 ("3891878852") + 1 ("\0")
yo-mismo Author 15. Apr 2011	Nice tip, sng, i only was tested it with 5 char's string for username... Wait second version
Mayhem 17. Apr 2011	@Reetus Self Keygen means patching the app so it tells you the correct serial instead of validating the one you enter.
yo-mismo Author 18. Apr 2011	@vlad648 yes, that's a bug, see the sng-'s comment.
aldofavorito 19. Apr 2011	guys I apply two jumps to another address and I turned, but not to get valid serial crak and user chicos yo aplique dos saltos a otra direccion y me resulto, pero no se crak para sacar serial valido y usuario
Coccinell 19. Apr 2011	correction : name must be 4 or 5 chars.
yo-mismo Author 19. Apr 2011	If the username have more than 5 char's, the crackme can turn crazy... A little bug Si el usuario contiene más de 5 caracteres, el crackme se volverá loco... Un pequeño bug
freesoul 21. Apr 2011	Challenge for Numernia: Translate his nick. Lol
yo-mismo Author 02. May 2011	Solved! Wait next version...
Wins0n 07. Mar 2012	Username my overwrite serial. I think you need some bounds check
Wins0n 07. Mar 2012	@Wins0n Username may overwrite serial :)

yudi's Step 2

Download 2done.zip, 156 kb (password: crackmes.de)
Browse contents of 2done.zip

1. Find my "good boy message".
2. Keygen is a must.
3. Patch,bruteforce etc. not allowed
4. write tut
easy : level 2

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 31. Aug, 2008
Downloads: 951

Rating

Votes: 3
Crackme is quite nice.

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Solutions

Solution by Warning, published 16. nov, 2008; download (969 kb), password: crackmes.de or browse.

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Discussion and comments

lgtngstk 02. Sep 2008	VB Crackme #2! I want to try but my brain hurts. :(
Xspider 02. Sep 2008	and if u try this your brain will be more hurted xD
MACH4 03. Sep 2008	Yea easy and the date/time involvement lame, but I think this is one of the more interesting VB Crackmes of late. Some interesting stuff in that Crackme. Think there is more difficult ones to come from yodi. What I like is the multi ways to attack it!
Kakashi 03. Sep 2008	my brain exploded. ^^ like a counter strike gamer: BOOM!!! HEADSHOOT ;) crazys, poor people... ^^ Regards, -kakashi
Whivel 06. Sep 2008	you forgot vb decompiler from your list
fazl 28. Nov 2008	Baby, you drive me crazy!!!

yudi's yudi`revolution

Download 3done.zip, 412 kb (password: crackmes.de)
Browse contents of 3done.zip

1. Find my "good boy message".
2. Keygen (+ source) is a must.
3. patch,bruteforce etc. not allowed
4. write tut

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: (Visual) Basic

Published: 08. Sep, 2008
Downloads: 496

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by DeepBlueSea, published 27. sep, 2008; download (271 kb), password: crackmes.de or browse.

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MACH4 08. Sep 2008	When I put in the right code, the program exits! At least I believe it's the correct code, it don't exit when I put in the wrong code! No debuggers running and using the original CrackMe!
MACH4 09. Sep 2008	ah made a keygen, but a tute would take too long

yudi's yudi's crackme 1

Download 1done.zip, 53 kb (password: crackmes.de)
Browse contents of 1done.zip

1. Find my "good boy message".
2. Keygen is a must.
3. Patch,bruteforce etc. not allowed
4. write tut
very easy : level 1

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 27. Aug, 2008
Downloads: 1434

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Solutions

Solution by coffeebean, published 31. aug, 2008; download (6 kb), password: crackmes.de or browse.

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Solution by br0ken, published 31. aug, 2008; download (16 kb), password: crackmes.de or browse.

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Discussion and comments

hetaopi 29. Aug 2008	not very easy^_^ maybe my skill is too lack ;p
coffeebean 30. Aug 2008	Easy, just annoying to navigate VB code in olly. Submitted a solution, hope it gets through (my first solution!) :D
znet 30. Aug 2008	solution sent =) nice one yudi! simple but nice. keep it goin
br0ken 30. Aug 2008	Its a very easy cme. Only difficulty, as coffeebean pointed out is VB code :)
lgtngstk 31. Aug 2008	If we solve it, can we have a copy of the source?
znet 31. Aug 2008	yes but we must encourage those who make these crackmes...i've said it was simple but maybe it could by a nice step for someone who is learning. peace
Kakashi 01. Sep 2008	nice crackme, very easy. i think i don't need to submit my solution; i couldn't keygen it (but fish a VALID serila for my name ^^). P.S.: G'd day br0ken! ;D
Kakashi 01. Sep 2008	Ah, forgot to say: I is it ok to solve this crackme with VB Decompiler Pro v.3.4 or SmartCheck v.6.2 RC2?! It's a lot of easier! Regards, kakashi
Xspider 01. Sep 2008	@Kakashi: yep i think so ;)
lgtngstk 02. Sep 2008	Bah, I was hoping to solve this one but you guys are too fast!
Kakashi 02. Sep 2008	@Xspider: In which language do you want to code?! I try in asm... he, he ;) Difficult for a newbie, even the algo is cristal clear... Regards, -kakashi
Xspider 02. Sep 2008	yep it is just two or three lignes xD maybe try VB, C/CPP or delphi... ;) but asm is a little bit hard for newbies as u said ^^
Kakashi 03. Sep 2008	yep, but depends on WHAT tuts you're reading ^^ ;) i like asm, and th eothers are too difficult, so... ^^ cheers, kakashi

yyyyyyy's yyyyyyy1

Download yyyyyyy1.tar.gz, 2 kb

Hi!
This is my first crackme, written in pure NASM (Linux).

Rules:
* Create a keygen
* No bruteforcing
* No patching

That's it.
Have fun!

PS: As this is my first crackme, don't be too hard with me - we all learn as we code. :)

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unix/linux etc.
Language: Assembler

Published: 21. Aug, 2010
Downloads: 364

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Solutions

Solution by Yoha, published 14. feb, 2013; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

crevetor 01. Mar 2014	Took me a pretty long time but I finally got it. Had a lot of fun and learnt a lot about some more obscure instructions.

zaabz's zCrackMe#1

Download zCrackMe_1_-_crackme.de.zip, 179 kb (password: crackmes.de)
Browse contents of zCrackMe_1_-_crackme.de.zip

This is my first crackme, aswell as its my first c++ program.
The task is to reverse the algorithm, and create some serial keys. Patching is not allowed.
If you feel like making a tutorial, please put some effort in it, as I have used a good amount of time in making the crackme.

Here you have some examples:
Account name:
ZaabZ
Serial:
1300NX-2990XN-7800ED-10920DE-4680UM-1300IB-2990BI-7670VP-10400PV-4160LK-520CZ

Account name:
CrimeRider
Serial:
2680LK-6164KL-16080YT-22512TY-9648RA-2680FC-6164CZ-15812ZF-21440NX-8576XN-1072VP

Account name:
CrackMe
Serial:
2020LK-4646KL-12120YT-16968TY-7272RA-2020FC-4646CZ-11918ZF-16160NX-6464XN-808VP

Account name:
Firstcppcrackme
Serial:
3960NX-9108XN-23760ED-33264DE-14256UM-3960IB-9108BI-23364VP-31680PV-12672LK-1584CZ

Account name:
Oh_lol@Crack-me
Serial:
4400NX-10120XN-26400ED-36960DE-15840UM-4400IB-10120BI-25960VP-35200PV-14080LK-1760CZ

Have fun cracking

ZaabZ

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 23. Dec, 2010
Downloads: 560

Rating

Votes: 3
Crackme is boring crap.

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Solutions

Solution by promix17, published 12. feb, 2011; download (178 kb), password: crackmes.de or browse.

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Discussion and comments

NicoPyright 24. Dec 2010	Account name: NicoPyright Serial: 2710LK-6233KL-16260YT-22764TY-9756RA-2710FC-6233CZ-15989ZF-21680NX-8672XN-1084VP Good crack me.
3ton 24. Dec 2010	Name: 3ton Serial: 700NX-1610XN-4200ED-5880DE-2520UM-700IB-1610BI-4130VP-5600PV-2240LK-280CZ
cybercrisis 24. Dec 2010	Good crackme. solved but the tutorial in Spanish ,sorry greetings from Mexico :)
zaabz Author 24. Dec 2010	That was quick :D I hope you enjoyed it. Please do tell me if you have any improvement for the next CrackMe. @ cybercrisis - Thanks for the tutorial. Anyone else care to make a tutorial? Im kinda curious, on how you guys made them ;) ZaabZ
Sy1ux 25. Dec 2010	Sy1ux 640NX-1472XN-3840ED-5376DE-2304UM-640IB-1472BI-3776VP-5120PV-2048LK-256CZ Quite easy to fish, but still a good crack me. I haven't yet completely understood how the algorithm works but a tutorial is coming soon.
zaabz Author 26. Dec 2010	@ Sy1ux Cheers man! I would love to see the tutorial :D Once it is up, I will let you know how the algorithm works, though it is kinda simple. ZaabZ
msm2E4D534D 26. Dec 2010	nick: MSM pass: 620NX-1426XN-3720ED-5208DE-2232UM-620IB-1426BI-3658VP-4960PV-1984LK-248CZ Nice crack-me
draww 26. Dec 2010	name: draww code: 1160NX-2668XN-6960ED-9744DE-4176UM-1160IB-2668BI-6844VP-9280PV-3712LK-464CZ strange, all names 5 or below contains same ending strings (NX,XN,ED,DE,UM,etc..) ;) thansk 4 the cm
zaabz Author 26. Dec 2010	Yeah, thats the purpose. Would you mind making a tutorial? :D Working on the next CM. ZaabZ
dangerduo 28. Dec 2010	name: dangerduo code: 2400LK-5520KL-14400YT-20160TY-8640RA-2400FC-5520CZ-14160ZF-19200NX-7680XN-960VP collecting the serial is pretty straight forward, but the algorithm seems complicated, lol. Thanks for the crackme!
disintx 31. Dec 2010	name: disintx key: 1610NX-3703XN-9660ED-13524DE-5796UM-1610IB-3703BI-9499VP-12880PV-5152LK-644CZ Need to write a keygen, will have one up when I have free time.
apuromafo 01. Jan 2011	maybe the composing values is the important.. fish is good cmp method with long for use nx , xn, ed , de but the theme is how find all values posibles or understand at all the sumation..example user 1 , user 2, user 21 , user 12 values for user 12 = 1+2 and values from letters are from string.. tutorial cybercrisis is a fish way.. is posible post a tutorial for fish this app and solve this'?
zaabz Author 05. Feb 2011	No solutions yet? :/
sphaaz 10. Feb 2011	just got hold of it!! :) sphaaz 1510NX-3473XN-9060ED-12684DE-5436UM-1510IB-3473BI-8909VP-12080PV-4832LK-604CZ Gotta dig in for algo extraction, and possibly keygen!:)
promix17 10. Feb 2011	Try to write a tutorial
promix17 11. Feb 2011	I've done a tut. And again it isn't loading! Why? Is it a bug at the site?
sphaaz 11. Feb 2011	i posted 3 days ago solution for bukobgs keyfileme1, its still pending, well probably mods have a lot of work:)
promix17 11. Feb 2011	No, I mean that it can't be download to the server - brouser hanges at 80%...
zaabz Author 17. Feb 2011	Thank you for submitting a solution :) I had no intentions of creating a new CrackMe before this one was solved, with a solution aswell. When I get some spare time I will make a new one;) ZaabZ

zaas's Old_KeygenMe_2010

Download Old_KeygenMe.zip, 24 kb (password: crackmes.de)
Browse contents of Old_KeygenMe.zip

Rules:
Only Keygens Are Allowed.
A Tutorial Would Be An Added Bonus.
Language: VC 6.0
Please Do Solve.
Thanks

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 02. Jun, 2014
Downloads: 313

Rating

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Solutions

Solution by baderj, published 13. nov, 2014; download (116 kb), password: crackmes.de or browse.

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Discussion and comments

grayfox 03. Jun 2014	Is patching absolutely unallowed. Because there is a weird instruction block (the JMP MOV RETN thing...) and I don't find a way to circumvent this block. That's why I wonder if one has to patch this.
r0bert 12. Jun 2014	Zaas, care to comment ?
baderj 23. Oct 2014	@grayfox you don't need to patch it.
redoC 25. Oct 2014	bugged or I missed something? 00401734 MOV [LOCAL.44], 0 ;always zero ... so it will be always "Try again" ?
baderj 27. Oct 2014	@redoC You missed something. SPOILER: IDA`s graph view reveals how to get to "Well done": https://raw.githubusercontent.com/baderj/crackmes/master/zaas%27s_Old_KeygenMe_2010/images/good_and_bad_boy.PNG
redoC 27. Oct 2014	Does anyone solved it? How to get to this SEH?
redoC 27. Oct 2014	...I see it, name chars out of range AZaz09
baderj 28. Oct 2014	@redoC that's correct, but only the first part of the crackme. My solution is still being reviewed - you can view the version here if interested: https://github.com/baderj/crackmes/tree/master/zaas%27s_Old_KeygenMe_2010
Matteo 10. Mar 2015	solved :) User: Matteo Pw alphanumeric: ezzz£ User: Matteo Pw anychar: [~\|~£ £=the char that will be printed if you press shift+3
pangpang 03. May 2015	Here is a serial: name:pangpang pssw:cnW8# This keygenme is very interesting.I like it.:)

zairon's crackme#1

Download zai_crkme1.zip, 2 kb (password: crackmes.de)
Browse contents of zai_crkme1.zip

name/serial

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Mar, 2002
Downloads: 2187

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Solutions

Solution by j!m, published 30. mar, 2002; download (37 kb), password: crackmes.de or browse.

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Zakne's Crackme:Crackme #2 by ZaKne

Download crackme.zip, 6 kb (password: crackmes.de)
Browse contents of crackme.zip

Crackme
find a serial
make a keygen
upload a solution.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 28. Jun, 2009
Downloads: 1674

Rating

Votes: 3
Crackme is nothing special.

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Solutions

Solution by borut, published 07. jul, 2009; download (5 kb), password: crackmes.de or browse.

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Solution by stranac, published 04. jul, 2009; download (2 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

WarRock 28. Jun 2009	uii now bit harder :D
Zakne Author 29. Jun 2009	it's pretty easy to find a serial for your name, but i need a keygen :)
WarRock 29. Jun 2009	yep if i have time i work on :) ... have done some work :D
Zero14x 29. Jun 2009	will give this one a go 2 :)
Zero14x 29. Jun 2009	umm,when i try it with any name and any key olly says before it reaches strcmp that the EIP address is not readable and the program stays running without any good or bad boy message , is this OS related?
KcDaRookie 29. Jun 2009	Which OS do u have Zero?? On XP SP3 no problem finding a serial for my nick...
Zero14x 29. Jun 2009	i have sp3 :S,and its not an anti debugger trick because in cmd it also stays jammed
WarRock 29. Jun 2009	xp sp2 works great
Zakne Author 30. Jun 2009	Zero14x i have Sp3 too and no problem to find a serial for my name,i think something is wrong with your ollydbg, or OS.
Zakne Author 30. Jun 2009	73 downloads and no keygen :\|
The So;X 30. Jun 2009	@Zakne i have facing same problem as Zero14x.
The So;X 30. Jun 2009	@Zakne i have same problem as Zero14x.
Zero14x 30. Jun 2009	ok i have tested it on my laptop wich is sp2 and it works fine i've found a key for my name so maybe i'll try to analyze it and make a keygen for it :)
Zero14x 30. Jun 2009	I know what it is now, its a buffer overflow , probably the generated key is to long for the program to handle , maybe it has something to do with my computer name because its kinda weird :P
Zakne Author 30. Jun 2009	got it will fix it
Zero14x 30. Jun 2009	ok i'll try to keygen it after its fixed :)
Grepall 30. Jun 2009	I just submitted a keygen. It just hack the original crackme file by replacing the strcmp call with a printf call. I think it may not be a qualified KEYGEN. Anyway, I'll try to write the keygen algorithm by myself then.
Zakne Author 30. Jun 2009	ok i uploaded a new version,fixed bug with buffer overflow,happy cracking:))
Zakne Author 30. Jun 2009	by the way i had to replace some symbols, so the generation key is diffrent from the privious ,sorry
dakn 30. Jun 2009	done ^_^ modify crackme prg: 00401565\| 890C24 \|MOV DWORD PTR SS:[ESP],ECX 00401568\| 90 \|NOP 00401569\| 90 \|NOP 0040156A\| 90 \|NOP 0040156B\| 90 \|NOP 0040156C\| E8 9F050000\|CALL <JMP.&msvcrt.printf> enter your name and wrong pwd to see right pwd ^_^
Zakne Author 01. Jul 2009	paste a solution:)
br0ken 01. Jul 2009	Why are you guys struggling so much? This one is pretty easy. Just keep an eye on the big string (abcdef.....) and several smaller ones. ( QMD.W6..J8..D2.S4..B5..and so on..) and trace through the program. You should be able to make a keygen easily. PS : If I have said too much, you may remove this comment.
WarRock 01. Jul 2009	then im on the true way :) just need some time lol...busy :S
Horatio 01. Jul 2009	I uploaded a keygen written in python.
stranac 02. Jul 2009	I just made anice little tutorial + keygen. I hope it gets accepted
MCxCodex 02. Jul 2009	I think is better wait the new version uploaded by Zakne. I wrote tutorial and keygen three days ago, but I prefer don't post until new version will be publicated. Anyway, this version works fine if name entered is <= 44 character
MCxCodex 02. Jul 2009	ops sorry a little mistake. forget <=44.. much less :)
WarRock 03. Jul 2009	shit need solution :S hmmmlol
Zakne Author 03. Jul 2009	hmmm seems to be the submission of solutions is closed, very sad :(((
stranac 03. Jul 2009	@WarRock Here's a short version of mine: http://rapidshare.com/files/251573867/ZaKne_s_crackme__2_solution.zip
WarRock 04. Jul 2009	wow thank u man :)
Zakne Author 08. Jul 2009	Thank's to all who cracked my crackme and made keygen's, i'll make a another crackme more harder:)))))
Symbol 10. Jul 2009	Oh damn, I'm too late, it's already cracked... :) My friend sent me this and I keygened it, then I searched for it in here and luckly I found it. :P Here's a download: http://www.fileflyer.com/view/pfcsMA8 And source: http://pastebin.com/f5edbefcd ~Symbol.
dragonuv 19. Oct 2009	im having a problem with the crackme, it reaches this line for me: 77c460c1: mov dword ptr ds:[edi],edx and i dont know how it reaches there
qHF; 26. Oct 2009	I cracked it and wrote a nice keygen for it. Too bad the submissions are closed. I thought I keygened it right at first but you changed the way the second part of the key was made and I didn't catch it in time. I'll attempt your third crackme soon.
johnnycannuk 30. Aug 2010	Wow..don't do this on a computer with a full name and domain included...my pass was about 100 chars long! Strong auth eh? ;-)
AdamF 25. Sep 2014	If crackme doesn't work then change line 004012C3 from: MOV DWORD PTR SS:[EBP-1C],10 to: MOV DWORD PTR SS:[EBP-1C],0F And have a good fun! :)))

Zakne's Zakne:CrackMe #1 by ZaKne

Download ZaKne__s_crackme.zip, 5 kb (password: crackmes.de)
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This is my first crackme :P

find the serial.
make a keygen.
upload a solution.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 23. Jun, 2009
Downloads: 1030

Rating

Votes: 7
Crackme is boring.

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Solutions

Solution by Zero14x, published 23. jun, 2009; download (6 kb), password: crackmes.de or browse.

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Solution by yudi, published 23. jun, 2009; download (142 kb), password: crackmes.de or browse.

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Solution by hackereha, published 23. jun, 2009; download (100 kb), password: crackmes.de or browse.

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Discussion and comments

WarRock 23. Jun 2009	very nice...not a real hard thing but good for my fucked brain now =)
Zero14x 23. Jun 2009	Yeah indeed its easy but good to improve your coding skills by writing a keygen for it :)
WarRock 23. Jun 2009	yeah trueee like ut
hackereha 23. Jun 2009	lol i wrote in my tut "btw it is my first keygenme" now i've realized i meant it was my first tut xD anyways you get it:)
Zakne Author 24. Jun 2009	Yeah crackme is simple for beginners ,i'll make a nother one more harder thank's for cracking it.
WarRock 26. Jun 2009	ive writen a keygen too was fun :)
thephoenics 27. Jun 2009	Very easy :) ...!
KcDaRookie 27. Jun 2009	yepp.. easy but fun ^^ wrote a keygen in javascript for that one ^^
PimpDawg 30. Jan 2010	Woot my third keygen today! Thank you for writing this keygen. I had a lot of fun doing it. Took me 10 mins :)
mohamedkaram 24. Jul 2010	:/ i am new here its just my 2nd day in cracking :D but i am a good programmer, my problem is getting the code from ollydbg :S i am tracing this prog and nothing happens it just prints try again, and while debugging i dont get any codes it just keep moving to the next step till it returns and the prog closes.. i even stepped into every function after the input :/ can u help me plz ?
Plitvix 13. Mar 2012	Just did the keygen, was pretty easy. If anyone is interested, here is php code; http://nopaste.me/paste/4832965614f5f798db534e

Zakne's Zakne's crackme#3

Download crackme.zip, 138 kb (password: crackmes.de)
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Greetings...
This is my third crackme
Rules ARE:
***********************
no bruteforcing
no selfkeygening
make a keygen
upload a solution
***********************
patching is allowed :)
crackme has one anti - debug trick
aslo it has string reference protect made it my self :P
that's all..

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 24. Aug, 2009
Downloads: 533

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Solutions

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Discussion and comments

qpt^J 25. Aug 2009	Patching Antidebug trick 00401CE2 90 NOP 00401CE3 90 NOP 00401CE4 90 NOP 00401CE5 90 NOP 00401CE6 90 NOP name qpt^J Serial 4079889144 -215078152
Zakne Author 25. Aug 2009	qpt^J well done! waiting tut :)
Zakne Author 06. Sep 2009	has anybody made a keygen yet? :)
-Lord Virus- 13. Sep 2009	ZZZZ waiting for the tu..
[xorolc] 16. Jan 2010	Zakne - I have this thing keygened, but i think there is some serious issues going on. the crc value gets set to different values on different systems. I don't want to submit a tut/keygen until you can fix that. Anyone else having issues with that?

zart's MiSHKA'S RETRiBUTiON

Download MiSHKAS-RETRiBUTiON-keygenme-CRACKMES.DE-VERSION.zip, 99 kb (password: crackmes.de)
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My second contribution to the site, spent a while on this one - algorithm sort of just came to me when I was helping a student solve a problem. Been fine tuning it for a bit -- added some little anti-tricks in this, shouldn't slow many people down - just the pure newbies.

Fishing a serial is considered a good accomplishment, though being able to make a keygen should be your main goal.

I hope you all enjoy this as much as I enjoyed making it.

My one hint to you is... Everything is done for a reason - if something seems easy, maybe it wasn't done for the reason you think it was.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 26. Jan, 2008
Downloads: 813

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by andrewl.us, published 23. apr, 2008; download (65 kb), password: crackmes.de or browse.

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Discussion and comments

TiGa 26. Jan 2008	This KeygenMe is packed with UPX for a special reason.
soychino 27. Jan 2008	a little mistake,only check the original file,so the anti is not working.
zart Author 27. Jan 2008	Not a mistake - this is known. Try not to give stuff away. Besides it's like stated above <<added some little anti-tricks in this, shouldn't slow many people down - just the pure newbies.>>
cosmos 31. Jan 2008	I think i reached the serial routine starting at 4017BF. But the algo seems lengthy. Its too difficult for me..
yaaara 07. Feb 2008	Yes, serial routine starts at 4017BF and it must return non zero value in EAX. I patched it and it works, but I don't think that patching is allowed :)
zart Author 09. Feb 2008	Nope, no patching, but a brute force would definitly work... Anyone getting anywhere with this?
yaaara 17. Feb 2008	I coded a brute force loop. It didn't give me any solution for passwords of length 4 & 5. Then I stopped trying.
zart Author 18. Feb 2008	If you look at the code enough, you should be able to make a smart brute forcer - or atleast figure out what the approx length would be for a valid code.
Spooky 18. Feb 2008	I have problem with this loop:004017DB.Also the first 5 signs.The rest I have solved , this was not so difficult :).What for a mathproblem can it be? Permutation ?
zart Author 15. Apr 2008	No love for this one eh?
DigitalAcid 15. Apr 2008	I willll take a look at it again :).
DigitalAcid 15. Apr 2008	This is a hard one :\|. Algorithm is indeed long and i think a bruteforce is needed to solve it.
Zaphod 18. Apr 2008	I have bruteforced for 6 chars without luck. Are there more chars in a correct serial?
DigitalAcid 18. Apr 2008	It will take alot of time to even fish 1 serial, but i have a feeling i'm on the right track. @Zaphod: i noticed that the length is not so important, but the right order of the characters is ;). For example: "abcd" would fail, but "bcad" would work.
Zaphod 19. Apr 2008	DigitalAcid: You are right about the order of the chars, but a bruteforce should try them all, of course. And unless I have made a mistake in my bruteforcer, there must be at least 7 chars. As this would take hours to go through, I am inclined to think there IS a fault in my bruteforcer :( What do you say, zart?
Shism 20. Apr 2008	Well, if this just another one of those bruteforce crackmes, then count me out of this one. These are getting quite old,annoying and boring.
DigitalAcid 20. Apr 2008	I didn't have time this week-end, so i didn't try any more :/. @Zaphod: if i'm right, then a simple bruteforcer won't work. It's another trick from the author and that's all i'm going to say without saying too much ;). Also, the current key i'm trying is 11 characters long, but that doesn't really matter. However, you are probably right about the minimum length.
zart Author 21. Apr 2008	There are two main parts to the algorithm. If you'd looked at it enough, you will know what i mean. The IS a minimum number of characters persay due two both parts of the algo being intertwined. Though there isn't a fixed length. A simple brute forcer could work - but the idea behind it is to understand whats going on and either fish a serial or make a smart brute force that will solve it quickly (which should be apparent when you figure out how it's being checked) shism: I don't believe this is "another one of those" and the way you wrote your comment makes it sound like you didn't try it... Shouldn't be too hard, shouldn't be too easy... But well - to each thier own!
andrewl.us Moderator 28. Apr 2008	Hey zart, I have been thinking and am sorry to rate your crackme low. I think I just didn't get it. Any explanation as to what you were trying to do?
zart Author 09. May 2008	andrew - bravo my friend! I'm sorry you felt this was a non-sense keygenme... I felt like making one to show how to... generate a smart bruteforce - opposed to how i've seen too many people just ripping source and sticking in values. Sorry if it seemed senseless, but everything was done for a specific reason ;) glad someone has solved it. I guess i won't goto such length to make my next one confusing :)
zart Author 09. May 2008	Oh - and i did forget to mention... I was originally making this for the PPC so some of my methods are elongated in regular ASM, though it was nice and pretty when it was in it's true form... Just figured no one would bother in that one

zart's mishka tribute

Download keygenme.zip, 12 kb (password: crackmes.de)
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One of my first keygenme's in a long time. Was made to let newbies have a chance at getting into keygenning and hopefully lead into harder and harder ones.

make a keygen, do whatever you need to for this, just submit solution and keygen

serial fishing should be extremely easy, but then again - that wasn't the point was it?

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 12. Sep, 2007
Downloads: 1412

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Solutions

Solution by kienmanowar, published 21. jan, 2008; download (153 kb), password: crackmes.de or browse.

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Solution by lurchi, published 23. sep, 2007; download (11 kb), password: crackmes.de or browse.

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Solution by cyclops, published 23. sep, 2007; download (15 kb), password: crackmes.de or browse.

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Discussion and comments

ChupaChu 21. Sep 2007	This solution is wrong.. or not completely ok! try entering name: I was a bit faster :) correct serial is 41 not 97 as your keygen gives out. Also there is no 14 chars limit for name.. take look at here for what i beeleave to be correct solution to this: http://forum.astalavista.ms/viewtopic.php?t=62045 Regards, ChupaChu!
zart Author 22. Sep 2007	ChupaChu is correct, there is also no min of chars too.
IMPosTOR 22. Sep 2007	umm. i try to get serial. i think your keygen have bug. try to user [a...z] or [0..9] then on serial just enter. it registere lol your algorithm someting like this user : mahdi --->ahhdddiiii then if i use this user ---> ma then have --->aa now just enter serial number. 97 means user : ma - serial : 97 - it registered :-? My registration IMPosTOR 536870994 anybody have idea?
ChupaChu 22. Sep 2007	Impostor, i tried 0123456789 for name and just hit enter for serial.. and it is not working what you say. I think you confuzed something. Also take notice that it is a weak keygen algo, so aa, ba,ca,da,.. will all have the same key.. its perfectly normal i guess :)
IMPosTOR 22. Sep 2007	u say its no correct ? ma 97 or IMPosTOR 536870994 isay just enter user name [0..9] means user just 1 password = noting just enter or user just r password = noting just enter whats your registration message ?
ChupaChu 26. Sep 2007	Now i got it.. if one letteris netered correct serial would be 0, but also if nothing is entered, it is interpreted as zero (0) and keygen check it out as correct serial :) Yes i think you can say it is a bug, zart will have to watch for it next time :) Regards, ChupaChu!
SIDEBOTTOM 16. Dec 2007	Love the tunes! ;)

ZaZa's KeyGenMe v0.1

Download KeyGenMe.zip, 14 kb (password: crackmes.de)
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KeyGenMe v0.1 by ZaZa
Comment:
1. Written on VISUAL BASIC. NET
2. Do not obfuscated
3. Not packed

Rules:
1. Find the serial number or write a key generator
2. Write a description of the algorithm
3. Don't patch

Difficulty: 3 - Getting harder
Platform: Windows
Language: .NET

Published: 16. May, 2012
Downloads: 367

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Discussion and comments

ZaZa Author 28. May 2012	Once 200 people have downloaded KeyGenMe and will not be a solution, I'll post KeyGen ... I think so, that this KeyGenMe was too complicated...
tamaroth Moderator 31. May 2012	It's not that hard, you just made it annoying to reverse (for instance with forbidden pasting, code is quite long and you ask us to type it in?) I also had to recompile some of my tools just so I could launch it.
ZaZa Author 04. Jun 2012	For you it may not be difficult! But KeyGenMe downloaded by many people, but there is still no solution! And maybe when you insert the code you use WinAPI?
tamaroth Moderator 04. Jun 2012	Serial uses unprintable characters and I do not know how this will behave on the website, but in any case, here you go: name: tamaroth serial: 84e0BcCdcszmJ=c\|K`j^9yhL19<}t`?nknS?6+3j4kkzg6w{xx#qk@&"oiqR!f~VElbghm -mIhT8apT4cyehzVhjwaIQpAal\|~f}fQuqU.vjiH/iqgmzUt~yrPe{Unu^$r`rppsktH0{pgyn{GllyuL2i}bvdY&kz`u\|\'wivly`YfspubB3yhgzbxE
tamaroth Moderator 04. Jun 2012	Well, it seems something is lost in translation, here's a screenshot: http://i.imgur.com/CbQ1n.png There are few problems with the way crackme gets input serial as well as with decoding it. Because of that there are many serials that cannot be generated in the way I did it, they would have to be generated slightly differently for every name. Much simpler way would be for this crackme to take serial in base64 form for instance and then decode it, with that you could generate a correct serial for every name. The biggest pain with this kgm is the need of writing in VisualBasic, I had no idea that the language is still in use.
ZaZa Author 04. Jun 2012	Good work, tamaroth! The serial number can contain non-printable characters and CRC calculation has not been tested for a length of 8 characters. This is my flaw! I'm sorry... And Visual Basic not much different from C++, especially in Visual Studio .Net, as it still compiles to IL-code! Soon I'll post a KeyGen... Thanks to all!!
tamaroth Moderator 05. Jun 2012	You can download my keygen, patched crackme (so you can run it with tools in the background and you can paste the key) and the source of my keygen here: http://tamaroth.eu/crkme/keymaker_for_zaza_keygenme.zip
vinaybhaskar 05. Jun 2012	sir , which language use to crack a software

ZaZa's ZaZa's crackme 1

Download CrackMe.zip, 80 kb (password: crackmes.de)
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1. Need a KeyGen...
2. No Patch

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: (Visual) Basic

Published: 12. Jan, 2008
Downloads: 243

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Zephyrous's crackme #1

Download zeph1.zip, 11 kb (password: crackmes.de)
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simple name/serial

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Feb, 2003
Downloads: 2113

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Solutions

Solution by morecode, published 01. jul, 2014; download (288 kb), password: crackmes.de or browse.

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Solution by stingduk, published 24. apr, 2003; download (20 kb), password: crackmes.de or browse.

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Solution by _RiPTiDE_, published 23. mar, 2003; download (16 kb), password: crackmes.de or browse.

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Solution by BadSector, published 01. mar, 2003; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

Zephyrous's crackme #2

Download zeph2.zip, 10 kb (password: crackmes.de)
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serial only

Difficulty: 2 - Needs a little brain (or luck)
Platform: Unspecified/other
Language: Unspecified/other

Published: 27. Feb, 2003
Downloads: 1572

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Solutions

Solution by MaBi, published 30. aug, 2003; download (11 kb), password: crackmes.de or browse.

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Solution by _pusher_, published 28. feb, 2003; download (20 kb), password: crackmes.de or browse.

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Zephyrous's crackme #3

Download zeph3.zip, 14 kb (password: crackmes.de)
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name/serials

Difficulty: 3 - Getting harder
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Apr, 2003
Downloads: 1539

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Solutions

Solution by MaBi, published 28. mar, 2006; download (12 kb), password: crackmes.de or browse.

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Solutions

Solution by TwinkleBit, published 14. sep, 2009; download (150 kb), password: crackmes.de or browse.

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Solution by MCxCodex, published 07. jul, 2009; download (8 kb), password: crackmes.de or browse.

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Discussion and comments

Anton Troskie 03. Jul 2009	Ummmm..... and there is silence
KernelJ 06. Jul 2009	I find the no reflector rule to be inhibitive to progress, especially since there are other tools which do similar, or even an IL disassembler would be fine. I already have a solution using it... Self keygenning would be a good exercise too, but that's not allowed either. Kinda no point in this keygenme if you stick to the rules.
Zero14x Author 11. Jul 2009	Ahh glad to see its solved , good job MCxCodex @kernelj i was on vacation so i couldn't react , well for the self keygenning , that would be to easy to do so i keep it at No Self-Keygenning , for the reflector , ok you can use ildasm but not a real reflector , as you would just see all the code in a reflector and then you could just copy/paste it,wich would be to simple :)
s0l_ir0n 15. Dec 2009	^Zero14x i think ildasm needed only for patching, not for keygening

ZeroCoder's crackme #11

Download zc_cm11.zip, 3 kb (password: crackmes.de)
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a little piece of evidence can help you ...

Difficulty: 5 - Professional problem to solve
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Jul, 2002
Downloads: 1675

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Solutions

Solution by cronos, published 11. jul, 2002; download (73 kb), password: crackmes.de or browse.

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ZeroCoder's crackme #11

Download zc_cm11.zip, 3 kb (password: crackmes.de)
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name/serial

Difficulty: 7 - Very hard
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Sep, 2000
Downloads: 2552

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Solutions

Solution by cronos, published 01. sep, 2000; download (73 kb), password: crackmes.de or browse.

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ZeroCoder's crackme #12

Download zc_cm12.zip, 845 b (password: crackmes.de)
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Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 01. Sep, 2000
Downloads: 2107

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Discussion and comments

TaGaDaPaF! 03. May 2005	Hello :) I've tried to bruteforce the algo with numbers and a dictionnary, no luck. Is there anything to do beside bruteforcing ? (it would take years...)
Sinclaire 03. May 2005	Well, judging from the rating the autour has set for it, therefore bf it is not very applicable, and do you think bf was the way ?, then i think you misunderstood the purpose of the challense, break the protection by explaining how it works, not just to get a serial or whatever it wants, i suggest you analyse it more (i.e. static analysis), and good luck.
TaGaDaPaF! 03. May 2005	Well... I know how the algo works, but i can't figure out how to reverse it. It compute a hash from the name, therefore it seems impossible to reverse it. I will try some other way to break it an other day :p
ZeroCoder Author 04. May 2005	hi crackers-brothers. why you won't use random bruteforce attak? tips: true password of 10chars
TaGaDaPaF! 04. May 2005	Heh ... bruteforcing... Current Serial: 0QB6YmyrNC Rate: 415910 Serial/sec Current Serial: Ab3QBCgH81 Rate: 417196 Serial/sec It will take me 60000years for the worst case :) maybe i will be very lucky and have it in 2 years ! I feel stupid :)
cronos 17. May 2005	perhaps there is a shortcut, like in zerocoders #11 which had a 16-byte key ?
cronos 18. May 2005	well, i had a look. i don't see any shortcuts at the moment. i tried a bruteforce using the output of jtr with a big set of rules and didn't manage to crack it. my general bruteforcer for this is a lot slower than yours (even taking an early exit strategy). i was hoping to see some correlation between input bits and output bits and use a more intelligent approach but i can't find one....
TaGaDaPaF! 18. May 2005	This was my idea: the serial length is 10 chars, the function procuce a hash of 10 bits. I start with a choosen serial, hash it, generate a serial from the hash (and this is very fast), hash it, ... and so on. I log a serial every 60secs in a file and an other program that i launch manually verifies if the main program has not gone into a loop. I've stopped because it looked endless... maybe there is something smart to notice ! ( oh ! maybe not... ) I will look it again in a while, i will have a fresh look on it ;)

ZeroCoder's crackme #14

Download zc_cm14.zip, 1 kb (password: crackmes.de)
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find the protection...

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 11. Oct, 2001
Downloads: 3070

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Solutions

Solution by code_inside, published 11. oct, 2001; download (3 kb), password: crackmes.de or browse.

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Solution by detten, published 11. oct, 2001; download (4 kb), password: crackmes.de or browse.

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Solution by figugegl, published 11. oct, 2001; download (3 kb), password: crackmes.de or browse.

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Solution by zairon, published 11. oct, 2001; download (1 kb), password: crackmes.de or browse.

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ZeroCoder's crackme #15

Download zc_cm15.zip, 2 kb (password: crackmes.de)
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name/serial

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Mar, 2002
Downloads: 2354

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Solutions

Solution by figugegl, published 30. mar, 2002; download (18 kb), password: crackmes.de or browse.

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ZeroCoder's crackme v10.0

Download xg_cm10.zip, 911 b (password: crackmes.de)
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password

Difficulty: 6 - Hard, for very professionals only
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. Jul, 2003
Downloads: 1987

Rating

Votes: 4
Crackme is boring.

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Solutions

Solution by andrewl.us, published 14. jul, 2009; download (13 kb), password: crackmes.de or browse.

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Discussion and comments

pants 21. Sep 2005	As usual, a _beautiful_ crackme by ZeroCoder. @zc - solution on it's way to you... :) /pants.
ZeroCoder Author 01. Apr 2006	hehe... thanks but i don't see solution... ;)
pants 03. Apr 2006	Nice to see you still here. Solution was sent last september, usual email addrs (check pm....)
ZeroCoder Author 03. Apr 2006	hehe... pass it no sol :)))
pants 07. Apr 2006	Ah, you mean a tutorial - I don't do those. The world already has it's share of badly written tutorials. I will, however, help with vague clues if people ask. "If I am given a formula, and I am ignorant of its meaning, it cannot teach me anything, but if I already know it what does the formula teach me?" - St Augustine /pants.

pxor 09. Jun 2005	Yo anyone here try to crack this one yet ? looks nasty i think im close but there is something that i dont know ... if u tryed this on please contact me pxor@go2.pl TIA
ap0x 12. Jun 2005	.bornofobia solved this one, and Yes it is nasty. You must write a bruteforcer to solve it. But it will take ages because filename must is 12 chars long, so forget it!
pxor 12. Jun 2005	i cant even find correct hash from name and file extension that will pass the comparision of proc thats check is file name and file extension or shit from comman line is correct all values that i find and that passed this proc produce garbages and bruteforce method tooks about 2 years on my pc :D there must be some smarter method
ZeroCoder Author 15. Jun 2005	hehe.. .bonofobia - the best :)) ok, pxor for you (and all other peoples) tips: .pif
ap0x 16. Jun 2005	Yea I kind a figured that one out my self, but bruteforceing is still nessesary. I mean bornofobia was luky to find a colision... But that is not the real filename, is it? :)
ZeroCoder Author 17. Jun 2005	yes, not real filename... but .bonofobia know true name ;))
ap0x 18. Jun 2005	What about i send you my bruteforcer, and you give me the correct file name, so I can finaly sleep at night :)))
pants 19. Jun 2005	I haven't looked at #18 yet, but it sounds similar to #19 - if so then using a GA will help. (GA on #19 finds the pass quite quickly (~1 second with similar keyspace)).
ZeroCoder Author 21. Jun 2005	hahahah... 2apox: you can send me any bruterforce and other @@@, but if you can't find correct filename, you not receive true filename!!! 2pants: ah, you best, you know all... but i can't see any your solution for any my crackmes... ok, or send password for #19.. show me. don't f#ck brain. .bonofobia solved it, and find correct filename... but not true!!!
pants 22. Jun 2005	I'll bite :) Like you I don't write solutions, it's just for fun - but I will help where I can (like here). GA wasn't necessary, but was fun to write and works very well. I enjoy your crackmes - keep them coming :) /pants. ( SPOILER: pass for #19 is somewhere on this page ... hxxp://www.anekdot.ru:8084/an/an0410/f041031.html )
ZeroCoder Author 22. Jun 2005	ok.. hmm... anekdot.ru???
pants 02. Jul 2005	I took another look at #18 today (didn't work on w2k before, needs PE header patch). @pxor & ap0x: This can be solved without BF. Part2 can be done on paper. Part1 is helped by GA - but produces too many valid solutions (100's (so far) of valid collisions produce working messagebox). Narrowing of search space (ie knowing correct number of chars between '\' and 'if' would help....) Don't give in - it's a nice crackme :) @ZeroCoder: Yes, pass for #19 is on there - I have no idea what it means (couldn't find a translation) :)
asept!c 05. Jul 2005	Got a question-regarding that hint ".pif". So if we don't enter any arguments in the command line crackme will process it's filename and replace \ from the start of the path with " and that means it will process in second part pif" but pif" has no valid solutions then. So my question is do we enter arguments or we just change the filename (then every filename will have " processed in crackme algo, else it will have last byte of the argument entry processed)? If we change just the filename then the extension is not .pif but something else?!
ZeroCoder Author 17. Aug 2005	ohh.. pants cracked and this

ZeroCoder's CrackMe v19.0

Download xg-cm190.zip, 6 kb (password: crackmes.de)
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encode file or find password...

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Assembler

Published: 16. Nov, 2004
Downloads: 1674

Rating

Votes: 3
Crackme is boring crap.

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ZeroCoder Author 16. Aug 2005	pants encode cm.... ehh... :)) ps respect

ZeroCoder's crackme v20.0

Download xg-cm20.zip, 2 kb (password: crackmes.de)
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find password...

Difficulty: 3 - Getting harder
Platform: Windows
Language: Assembler

Published: 04. Nov, 2004
Downloads: 1768

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Discussion and comments

pants 23. Apr 2006	@zc - thank, very interesting cm :) (Solution in pm)
ZeroCoder Author 23. Apr 2006	yeahhh.... true... :\ pants - good cracker ;) - respect
Ox87k 23. Apr 2006	pants, why don't u write a solution? 1234 download and only one solution in pm! ;)
pants 21. Jun 2006	@ Ox87k - drunk answer was posted on h**p://www.crackmes.de/users/zerocoder/crackme_v10.0/ (post #5). less drunk answer: If you need a nudge in the right direction just pm - I'd be happy to help.

ZeroCoder's crackme v21.0

Download xg-cm210.zip, 2 kb (password: crackmes.de)
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find password...

crackme very slow :(

Difficulty: 6 - Hard, for very professionals only
Platform: Windows
Language: Assembler

Published: 26. Dec, 2007
Downloads: 771

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Discussion and comments

pants 06. Jan 2008	Good to see you back with another classic, zc. btw - crackme not slow :)
ZeroCoder Author 06. Jan 2008	o... pants you here, hello :) :)) but not quick
Spooky 27. Jan 2008	solution possible without bruteforce ? it looks like an handmade hashalgo... or what else ?
ZeroCoder Author 31. Jan 2008	:) I think, that it are impossible. This crackme the answer to that excrement, which here are uploaded (90 %) recently (2-3 months)... 2coders: think more, have new ideas. Do not use the standard, it is not interesting.

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zeronet.l.'s crackme #4

Download zeronet_crackme4.zip, 184 kb (password: crackmes.de)
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Votes: 4
Crackme is boring.

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Solutions

Solution by kienmanowar, published 17. jan, 2008; download (152 kb), password: crackmes.de or browse.

kienmanowar has rated this crackme as quite nice.

Solution by Computer_Angel, published 17. jan, 2008; download (9 kb), password: crackmes.de or browse.

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Discussion and comments

R4Yx 10. Jan 2008	Yeah cracked it :) Soulution postet.
R4Yx 10. Jan 2008	btw nice crackme good for beginners
ZeroTen Author 12. Jan 2008	163 Downloads and nobody else could do it? =/
Encrypto 12. Jan 2008	well im writing up a solution so.. lol :) its easy .. as R4Yx said its really good for newbies like me :)
kienmanowar 15. Jan 2008	Huh i try to analyze this keygenme, i found the a solution for my username : Username : kienmanowar Password : 29369 Serial : 14707 I think this keygenme no so easy for newbie, i will try to analyze and write the solution :\|
Computer_Angel 16. Jan 2008	got ya, i'll post the solution soon
kienmanowar 16. Jan 2008	Submited my solution!! :) Regards

ZeroZero's Madness

Download madness.zip, 224 kb (password: crackmes.de)
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Keygen This, Can U ?

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 30. May, 2004
Downloads: 1059

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by D4ph1, published 24. oct, 2005; download (279 kb), password: crackmes.de or browse.

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Solution by Lesco, published 20. oct, 2005; download (268 kb), password: crackmes.de or browse.

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Discussion and comments

D4ph1 21. Oct 2005	Lesco the keygen doesn't work for me... It generates a random string somewhere in the serial. Its not so hard to program a keygenerator of this crackme that you need to self-keygen it! And by the way, author says only keygen is allowed not self-keygen! Am I so nerd or what?o_O My solution is on the way!:)
Lesco 21. Oct 2005	I think a self-keygen is also a keygen. The description said, i should make a keygen. By other crackmes patching is also forbidden but selfkeygens are accepted too. Yes it's not so hard to keygen but self keygen is the faster way. I don't know why it doesn't work for you. Does anyone else also have problems?
TDC[NL] 23. Oct 2005	Yep, here it doesn't work either...
code_inside 23. Oct 2005	Here the "keygen" works ;)
jB_ 23. Oct 2005	Same as code_inside :)
D4ph1 24. Oct 2005	Well, more specific : If you press the "Check" button once the serial that appeared in the box is the real one. But if you press more times the button with same Name, each time a different serial is generated. This happens in my PC
code_inside 24. Oct 2005	I've checked the Keygen again and entered my name (CoDe_InSiDe) and then pressed the button "Check" a lot of times and it doesn't give me multiple serials, just 1 valid serial. But then I entered your name (D4ph1) and pressed the button "Check" a lot of times and you're right, the serial changes everytime... :D
Shism 24. Oct 2005	doesn't on mine
D4ph1 25. Oct 2005	Wow! My name must be more complex than i thought!:)

ZeroZero's MiraclE

Download miracle.zip, 62 kb (password: crackmes.de)
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Password|Win32ASM|Easy

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Unspecified/other

Published: 14. Jul, 2004
Downloads: 5347

Rating

Votes: 4
Crackme is nothing special.

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Solutions

Solution by student, published 26. nov, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by ManWithNoName, published 27. sep, 2004; download (1 kb), password: crackmes.de or browse.

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Solution by xyzero, published 15. jul, 2004; download (8 kb), password: crackmes.de or browse.

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Solution by m@rio_crk, published 15. jul, 2004; download (2 kb), password: crackmes.de or browse.

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Solution by stan4oo, published 15. jul, 2004; download (5 kb), password: crackmes.de or browse.

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Discussion and comments

bboffin 09. Mar 2008	Great crackme. A nice step up from other beginner crackmes!!!
*DNison** 15. Jul 2009	what a great thing GetDlgitemTextA is the beginning of many program crackings start at this
th3flood 24. Jan 2010	Very nice crackme. Thank you!
tal170 19. Jan 2013	Solution http://pastebin.com/tBNFTSgp
tarequlcrack 07. Dec 2014	what is the password for source?
conflux 05. Jun 2015	Hi! I used Ida pro and just searched for ref strings, then looked at the map and change * to * (i dont want to give too much spoilers ;) ) in a hex editor. Great crackme!
aldeid 05. Dec 2015	My solution posted here: https://www.aldeid.com/wiki/Solution-ZeroZero-MiraclE
poole1994 11. Aug, 18:37	Well within reach. This was my first crackme and I really enjoyed it (especially once I had actually cracked it obviously!)
SandboxEscaper 20. Aug, 19:49	Thanks, pretty easy, but a good start for newbies! Short write-up that I wrote while going through the dissassembly: http://thomas-vanhoutte.blogspot.be/2016/08/crackmesde-solutions-1-analysis-of.html

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zhackerteam's vbcrackme 1

Download crackme.zip, 8 kb (password: crackmes.de)
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vbcrackme

Difficulty: 1 - Very easy, for newbies
Platform: Unspecified/other
Language: (Visual) Basic

Published: 18. Oct, 2002
Downloads: 1426

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Solutions

Solution by Shism, published 11. oct, 2004; download (8 kb), password: crackmes.de or browse.

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zionz's Zi - crakme

Download Zi_crakme.zip, 472 kb (password: crackmes.de)
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This is my first crakme, its written in BlitzBasic, i was not able to crack this :(.
Note: Consider it cracked if it accept any serial, not finding the right one.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 01. Jan, 2005
Downloads: 3048

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Solutions

Solution by pulse, published 02. jan, 2005; download (1 kb), password: crackmes.de or browse.

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Solution by [FiS], published 02. jan, 2005; download (1 kb), password: crackmes.de or browse.

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zionz's Zi - Crakme V2

Download zi_crackme_v2.zip, 472 kb (password: crackmes.de)
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This is my second crackme,this one is completly different from the first, i think this one is more difficult.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 04. Jan, 2005
Downloads: 1506

Rating

Votes: 3
Crackme is quite bad.

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Solutions

Solution by DaXXoR 101, published 15. mar, 2005; download (76 kb), password: crackmes.de or browse.

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zkp0s's "zkp0s's dummy crackme 1"

Download 001.zip, 186 kb (password: crackmes.de)
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For linux and windows.
Simple, but a twist: it uses the D ABI.
Think it is different (i used reals);
Blame me if you want.

Difficulty: 3 - Getting harder
Platform: Multiplatform
Language: Unspecified/other

Published: 05. Apr, 2009
Downloads: 160

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Discussion and comments

T.0.R.N.A.D.0. 05. Apr 2009	BitDefender does no allow me to download this crackme. :( Might be a false positive. ?!
kao 05. Apr 2009	Unkeygenable using normal methods because: 1) it generates 2 random real numbers. 2) it will show them on screen like this: "PRODUCT = 4.18039e+09 ,VENDOR = 4.06373e+09". 3) We need to do EXACT math on those 2 numbers but they are not shown with required precision. The only remaining options are patch or serial sniffer/self-keygen.

ZloY's ZloY Crackme 4 #Hard !

Download Crackme4_final.zip, 279 kb (password: crackmes.de)
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Very Very Hard !
P.S Packed Upx 2.93w for minimise size !

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Borland Delphi

Published: 26. Mar, 2007
Downloads: 465

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znycuk's CracKme#2 "Find my Passw0rd"

Download CracKmE#2_Find_My_Password.zip, 97 kb (password: crackmes.de)
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Hi,

This is my crackme # 2 "Find my passw0rd".
In this one, i've try to make the job a little harder.

Code: ASM
Protection: Custom
Level: 2

Objectives:

_ Unpack if needed
_ Find the password
_ submit a tuto

Rules:
Patching not allowed...

tested on WinXP SP2 but should work on SP1 and Win2K.

Good work !

Znycuk

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows 2000/XP only
Language: Assembler

Published: 10. May, 2006
Downloads: 1311

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Solutions

Solution by indomit, published 14. may, 2006; download (6 kb), password: crackmes.de or browse.

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Solution by red477, published 14. may, 2006; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

red477 09. May 2006	nice one,znycuk.well done!!! I find you:) solution is coming....
indomit 09. May 2006	I find it :) Nice crackme, znycuk, but your password can be composed by @ only :)
znycuk Author 09. May 2006	@red477: damn ! , it was beaten really fast... good work red477... waiting for your solution ;) Do you find, where was the password ?, i mean where it is stored. @indomit omg ! you're right ! i have to take a look at the serial checking algo... too bad... btw, thanks for ur comments, guys.
zairon Moderator 10. May 2006	New fixed version of the crackme uploaded.
znycuk Author 10. May 2006	Sorry for the bug, guyz :( i've fixed it yesterday, thanx indomit for the bug reporting. @Zairon: Thanx
red477 10. May 2006	@znycuk, I cannot catch you very much,sorry for my bad english.I didnot find where the password stores,but only find these data in the crackme file: 5AFF...FEFF If you mean this. Regards, BTW:Soution submitted,hope it won't be rejected.:D
znycuk Author 10. May 2006	That was not in the given objectives, but I wish that somebody be able to answer this: _Explain where is stored the password. and maybe: _Define which technique was used to store the password.
indomit 11. May 2006	let's see again ;)
indomit 11. May 2006	well_done_I_find_it ;) now I'll write a tut :)
znycuk Author 14. May 2006	G00D W0rk guys ! It seems that i really have to work on my packer project, btw it is my first try at coding a packer so... Well, finally i will answer my own question :-) The password was stored in the 24bit bitmap using LSB encoding steganographic technique... Thanx for ur work.
red477 14. May 2006	znycuk,thanks for your explanation,really nice.It was really a good time playing with your crackme:) Looking forward to your Packer and good luck with that. Regards.
Ank83 15. May 2006	Hi. I read the indomit solution and it was quite nice. Hint: indomit removing a hardware breakpoint: Debug\Hardware BreakPoints\... Then delete the breakpoint that you set up. Best Regards Ank83
indomit 15. May 2006	Oh, thanks Ank83 :))))

znycuk's cracKme#3

Download CrackMe#3.zip, 65 kb (password: crackmes.de)
Browse contents of CrackMe#3.zip

Hi,

Here is cracKme#3, i think this one will be hard for real newbies.
But not for the good reversers from crackmes.de :-)

I wish that you will have fun defeating it !

Note: My RDG Packer Detector seems to have a false positive on it,
it considers this file being packed with UG2002 Cruncher v0.3b3: That's not true !

======================
Code: ASM
Protection: Custom
Level: 3 (maybe)
======================

Objectives:

_ Unpack if needed
_ Make a keygen
_ submit a tuto

======================
Rules:
Patching the goodboy jump is not allowed...

tested on WinXP SP2 but should work on SP1 and Win2K.

Good work !

Znycuk

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Assembler

Published: 17. Jun, 2006
Downloads: 1226

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Solutions

Solution by aallove, published 25. jun, 2006; download (10 kb), password: crackmes.de or browse.

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Discussion and comments

Ox87k 17. Jun 2006	very g0od j0b man! ;) The AntiDebug tricks make the code a really jungle! I find the serial for my name, i try to understand how to make it. Thanks!
znycuk Author 17. Jun 2006	thanx Ox87k, yes, serial fishing is really easy on this one... But a keygen is required ;)
Ox87k 17. Jun 2006	the only think.. i find some difficult to unpack it, i'm working on packed exe :(
l0calh0st 17. Jun 2006	Good work znycuk....i think it can be keygenned without unpacking??
Ank83 17. Jun 2006	Hi When I try to download it, Kaspersky says that this is a visus infected file. Is it safe to download it ? Best Regards Ank83
HMX0101 17. Jun 2006	I can't unpack it!, some hints?
znycuk Author 17. Jun 2006	@Ank83 Yes, Fsecure have also false positive on it, it is surely because some parts of the code comes from vxers world... But don't be afraid, it's really just a crackme :) @HMX0101 Well, in this one i've most worked on the packer, than the crackme itself, And anti-unpacking was an aim ;)
haggar 17. Jun 2006	Crushes on my WinXP SP2, exception address 4232cf it's memory violation 0xc0000005.
Ox87k 17. Jun 2006	the keygen isn't very hard... the main problem (if u want to unpack it) is unpacking... some hints for this plz? :)
Ank83 17. Jun 2006	haggar in Olly you got to set to ignore custom exception with the range of c0000005. I think this will help Regards Ank83
znycuk Author 17. Jun 2006	@haggar Does it crash without any modification ? I mean: does it crash when you launch it normally ? Cos i've coded and tested it under WinXP pro SP2. @Ox87k Normally you cannot rebuild import automagically... So you have to do it manually... But i'm still a newbie in RCE world, so maybe an automatic process for import reconstruction is feasible...
HMX0101 17. Jun 2006	It crash if you have changed the NumsOfRvaAndSizes
znycuk Author 17. Jun 2006	in this case, it's normal behavior ;)
Ox87k 17. Jun 2006	if i change the NumsOfRvaAndSizes and set it to 10 in my case the crackme crashs! :\|
znycuk Author 17. Jun 2006	As i have said, it is normal behavior... If you change NumsOfRvaAndSizes, the inspect the code section and make your conclusion ;)
HMX0101 17. Jun 2006	i can't find the oep... somebody can help me?
red477 18. Jun 2006	Oh,very nice crackme,znycuk.Will look into it:D
Ox87k 18. Jun 2006	@hmx0101 this packer was made "in house" by znycuk. Usually the oep of a prg is 00401000. But why it would haven't to be also in this case?? :D
haggar 18. Jun 2006	I just extract it from archive and on double click exe crushed with msg from Dr.Watson. Then I opened it in Olly and sow that it's packed/protected. There is no point to try find bug/error in packed crackme.
znycuk Author 18. Jun 2006	hum so it crashes in the loader code... i will check this, but i also use XP SP2 (Home and PRO edition) and it doesn't crash...
haggar 19. Jun 2006	Well, shit happens, you know :-)
znycuk Author 24. Jun 2006	Anybody has submitted a solution ?
Zaphod 16. Sep 2007	znucyk, I took your good advice from CrackMe#4 and looked at this one instead. I didn't want to look at aallove's solution right away, so I tried to unpack it myself. I got much farther than with CrakMe#4, I have ALMOST unpacked it now. My dump.exe apparently works in every way except when I quit it. Then there is an exception. Well, I'll have a look at aallove's solution now...

znycuk's Crackme#4

Download znycuk_ckme4.zip, 62 kb (password: crackmes.de)
Browse contents of znycuk_ckme4.zip

It's time for crackme4.
I wish that you will have fun defeating it ! If U can :p

==================================================================
Code: ASM
Protection: Custom
Level: 3 (i think)
==================================================================

Objectives:

Required: Make a keygen or patch (but a keygen is better)
Required: submit a tuto on crackmes.de
Required: Rate it !

Optional: Unpack
Optional: Describe the protector.

==================================================================
Rules:

>>> everything is allowed but,
>>> serial fishing is not a valid solution
==================================================================

tested on WinXP PRO SP2, WinXP Home SP1, and Win2K3 server Entreprise Edition.

You could send me your solution or bug report (email is in my crackmes.de profile)

Good work !

Znycuk

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Assembler

Published: 12. Sep, 2007
Downloads: 1255

Rating

Votes: 5
Crackme is quite nice.

Rate this crackme:

Solutions

Solution by red477, published 16. sep, 2007; download (140 kb), password: crackmes.de or browse.

red477 has rated this crackme as quite nice.

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Discussion and comments

red477 14. Sep 2007	nice crackme, znycuk. working on it!
znycuk Author 14. Sep 2007	Thanks red477. Waiting for your solution ;)
Zaphod 14. Sep 2007	I'm working on it, too, but I'm getting absolutely nowhere :(
znycuk Author 14. Sep 2007	@Zaphod To help you, you can read the solution to my 3rd ckme. As some part are similar.
EvOlUtIoN 15. Sep 2007	i unpacked it, i found it interesting...similar to telock and something like that now i'm trying to write a keygen.
znycuk Author 15. Sep 2007	@EvOlUtIoN very nice... I'm really impatient to read your solution. Yes, you're right some idea provides from telock, but with less efficiency, i think. I'm already working on crackme#5, which will be packed too, but this time i'll try to make it harder than this one.
EvOlUtIoN 16. Sep 2007	As you also know, i'll write a solution as soon as i can...unpack was interesting and also keygen is simple to do!
znycuk Author 16. Sep 2007	Nice work red477 and nice solution. Well you know, i'm a newbie in protector coding too ;) And you're right, too much well known trick... But, i will do all my best to give you a more interresting challenge in #5. Again, well done.

znycuk's Znycuk's #1 CracKmE

Download ZNKKeygenme#1.zip, 3 kb (password: crackmes.de)
Browse contents of ZNKKeygenme#1.zip

******************************************************
Hi all,

This is my first and easy crackme (Keygenme), written in ASM.

_ Find the solution
_ make a keygen
_ And submit a tuto

tested on WinXP SP2 but should work on SP1 and Win2K.

Good work !

Znycuk
******************************************************

Difficulty: 1 - Very easy, for newbies
Platform: Windows 2000/XP only
Language: Assembler

Published: 26. Apr, 2006
Downloads: 1649

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

Solution by red477, published 05. may, 2006; download (7 kb), password: crackmes.de or browse.

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Discussion and comments

S10nt 27. Apr 2006	FUCOMI ST,ST --- COOL!
toshimi 27. Apr 2006	function RD... is random? Affect registers EAX and ECX... thanx
znycuk Author 27. Apr 2006	Toshimi: ---------- RDTSC : http://faydoc.tripod.com/cpu/rdtsc.htm It affects EDX and EAX It is not random, but i've used it to have some pseudo-random value... S10nt: -------- Yes, it's a cool instruction, isn't it ? :p
toshimi 28. Apr 2006	oops!. COOL!. jaja. thanx znycuk
liulinan123 15. Mar 2012	thanks your crack。studying；）

zons's nvo keygenme #1

Download keygenme.zip, 1 kb (password: crackmes.de)
Browse contents of keygenme.zip

Goal : Write a keygen.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 25. Mar, 2010
Downloads: 586

Rating

Votes: 3
Crackme is nothing special.

Rate this crackme:

Solutions

Solution by onepatop, published 25. aug, 2010; download (710 kb), password: crackmes.de or browse.

onepatop has rated this crackme as awesome.

Solution by freesoul, published 25. aug, 2010; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

_ghandi_ 26. Mar 2010	With a quick glance, i made a bruteforcer which spits out a valid key for my hwid but i guess you're looking more for an actual key generator?
Dionosis 26. Mar 2010	@_ghandi> With a quick look I think a bruteforcer is the only realistic solution.
_ghandi_ 27. Mar 2010	That was what i thought with the bit shifting, there are bits lost which cannot be recovered/reversed.
Numernia Moderator 31. Mar 2010	I took a quick look and it seems like its quite depended on when you try register it, since it seems like you need a TIME_DWORD so the following results in <32 bit: (0x9F536D226B489AF8 * TIME_DWORD) (mod 2^64)
Numernia Moderator 31. Mar 2010	Ok, this crackme is cool, and absolutely no bruteforce is needed. Once you get the structure of it is really easy.
BlackCode 04. Apr 2010	lol it's bugged, try to insert 4294967295 (0xFFFFFFFF)
onepatop 24. Aug 2010	I dont see anything easy bout this one, since it does like this: input_int^330345637 mod 4294967293 = result_int and then performs various checks on result_int. So to reverse input_int from result int, you will have to take 330345637's roots from result_int by modulo 9241 and 464773 with Adleman Manders Miller algorithm and then combine via Chinese remainder theorem(since 4294967293=9241×464773).Google search didnt reveal me any implementations of this kind of thing, so you probably will have to code algos yourself which is far beyond the scope of Level 2 crackme.
andrewl.us Moderator 24. Aug 2010	keep searching: this type of equation (exponent mod a value with two factors) is very well known and requires no special algo implementations to invert
freesoul 24. Aug 2010	OOh.. I'm working on this crackme I like it much :P
freesoul 25. Aug 2010	lol andrewl my problem was to notice that's a simple modular exponentiation... ofc I know rivest.. :P

zugo's darkshade keygenMe 1

Download keygenME-darkshade.zip, 22 kb (password: crackmes.de)
Browse contents of keygenME-darkshade.zip

Rulez:
no patching
Make a keygen
Write a tutorial

Difficulty: 3 - Getting harder
Platform: Windows
Language: (Visual) Basic

Published: 02. May, 2008
Downloads: 416

Rating

Waiting for at least 3 votes
(we have only 2).

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Solutions

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Discussion and comments

halsten 22. Jun 2008	Not hard, just a bit long.

zugo's zugo

Download zugo.zip, 10 kb (password: crackmes.de)
Browse contents of zugo.zip

1. NO PATCHING
2. Find Serial
3. Write Keygen
4. ;) Enjoy

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 20. Jan, 2008
Downloads: 773

Rating

Votes: 6
Crackme is nothing special.

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Solutions

Solution by The Arctic Imp, published 21. jan, 2008; download (27 kb), password: crackmes.de or browse.

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Solution by mindless, published 21. jan, 2008; download (174 kb), password: crackmes.de or browse.

mindless has not rated this crackme yet.

Solution by crackerlnn, published 21. jan, 2008; download (10 kb), password: crackmes.de or browse.

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Solution by Computer_Angel, published 21. jan, 2008; download (9 kb), password: crackmes.de or browse.

Computer_Angel has rated this crackme as nothing special.

Solution by klefz, published 21. jan, 2008; download (2 kb), password: crackmes.de or browse.

klefz has rated this crackme as nothing special.

Solution by mik26vn, published 21. jan, 2008; download (12 kb), password: crackmes.de or browse.

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The submission of solutions is closed.

Discussion and comments

macabre 20. Jan 2008	I guess I'm missing something but it appears you convert the serial to a number but it stops when it reaches a non digit character but it's ultimately compared to a hex value? How is that going to work? If my target name hash is C26269B7 but the serial check will bail when it sees the C. What am I missing?
Computer_Angel 21. Jan 2008	Easier than the first one, I think It's ok for me
mik26vn 21. Jan 2008	Same idea with Computer_Angel: it's easier than the first crackme. Thanks for coding ;) @The Arctic Imp: you dont want to give a chance to people, who come later ?
macabre 21. Jan 2008	Yeah, I'm retarded. I blame it on my cold :P Don't know why I let atoi() screw with me...sigh :)

zugo's zugo keygenme 1

Download zugo_keygenme_1.zip, 21 kb (password: crackmes.de)
Browse contents of zugo_keygenme_1.zip

no patchme

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Assembler

Published: 17. Jan, 2008
Downloads: 744

Rating

Votes: 8
Crackme is boring.

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Solutions

Solution by xylitol, published 11. jul, 2008; download (130 kb), password: crackmes.de or browse.

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Discussion and comments

halsten 17. Jan 2008	Nice algorithm, but easily defeated.
Encrypto 17. Jan 2008	Yep very nice algo.. still tracing it through :)
xylitol 18. Jan 2008	good for newbies :)
U-Soul 10. Mar 2008	it can be easily self-keygen
Sinok 11. Mar 2008	Wow, that was easy.
Sinok 11. Mar 2008	ROFL I just noticed something, enter a name and a password, and search for all text strings, you can see the serial there, lol
DigitalAcid 11. Mar 2008	After or before running the crackme ? ;)
xylitol 12. Mar 2008	Solutions Your solution to this crackme was rejected. damn rejected because i have not maked keygen
Sinok 14. Mar 2008	@DigitalAcid: After o.O
DigitalAcid 14. Mar 2008	I rest my case :P.
Sinok 16. Mar 2008	I R CONFUSED S_S
zugo Author 25. Mar 2008	yep,it's my first keygen me yea i know but it's keygenme for newbies thx everyone
Encrypto 26. Mar 2008	zugo. the hash algo used. is it a custom one ?
DigitalAcid 27. Mar 2008	So, do we still need to provide a keygen ? Description only says "no patchme". O.o
Dynasty 31. Mar 2008	took me about 2 seconds to fish a serial... you shoulda hidden the wsprintfA -- like stored it somewhere and called it when you needed it with GetProcAddress or something. the algo is nice indeed, but useless if you don't at least make serial-fishing hard. I have to say tho, it would be a pain to keygen this :)
r00ster 31. Mar 2008	Yea, the wsprintfA it the weak part of this cm...But it was funny, anyway, though it takes a minute or so...
costy 26. Apr 2008	I have a question for the Author or the Moderator. Can I submit a selfgen?? Could it be accepted as a valid solution??
xylitol 26. Apr 2008	@costy: selfgen is not tolerated
costy 29. Apr 2008	does it exist any program that lets to acquire part of the code of an executable file??
DigitalAcid 29. Apr 2008	Well, if you understand the code, you can recreate it and code it yourself. But if you don't understand it very well or if you're too lazy, you can try TMG Ripper Studio (It comes with CrackersKit2), just google it. I never really tried it, but now i did and it saves the code you want to an .asm file (so it's assembler). Might be handy ;).
costy 20. May 2008	Ok Digital Acid I will try
costy 22. May 2008	My selfgen didn't be accepted.
DigitalAcid 22. May 2008	Yeah, this was an easy selfgen, mine got rejected too earlier. Selfgen is considered patching too =).
costy 23. May 2008	i had some problem with TMG Ripper Studio too

Zuma555's Crypto crackme 1 - easy...

Download cryptokg1.zip, 2 kb (password: crackmes.de)
Browse contents of cryptokg1.zip

Hello everyone, sorry for the loooooooonnngg awayyyyyyyyyyyyyyyyyyyyyyyyy.... but you know university is f*ckd. Here goes another crackme from the heaven to hearth, this is an attempt for you to LEARN SOMETHING, its made for all the ones who are starting with crypto playground, if i wanted it to be hard it would be *HELL HARD*, so don't worry take it easy ;)

rules:

-no patching
-not any other rediculous solution, but an ellite stand-alone keygen+tutorial :)

MODERATOR NOTE: no search/brute

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 24. Oct, 2009
Downloads: 419

Rating

Votes: 4
Crackme is boring crap.

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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

Zuma555 Author 24. Oct 2009	To all: Sorry for the bug but memory buffers aren't cleaned. So for each time you want to try a new serial, please restart the application.
fenoloji 30. Oct 2009	name : eb58 serial: XX-XZ :p
Zuma555 Author 31. Oct 2009	i have no idea where you got that working, but it was not in my crackme for sure. Try this: zuma555 XXZXAAJ-XZJXKXJ Greetings, but try harder.
fenoloji 31. Oct 2009	name : eb58 serial: XX-XZ ----> This valid serial BUT your serial FALSE zuma555 ------->False XXZXAAJ-XZJXKXJ AND this valid serial zuma55587---------->TRUE XXZXAAJ-XZJXKXJ :p
Zuma555 Author 01. Nov 2009	WTF??? fenology check the integrity of your executable file... and also the integrity of ur cpu... THOSE SERIALS ARE NOT VALID!
Zuma555 Author 01. Nov 2009	you should re-download the exe... you have it patched somewhere.
HMX0101 01. Nov 2009	fenoloji serials works!, zuma yours doesn't... check out your own keygen U_U
jB_ 01. Nov 2009	Zuma555's code is totally bugged. His serials work for me, while fenoloji's ones don't. This is strange... I guess it is related to missing boundary checks on all the data manipulated during serial validation. I put a keygen here: http://jardinezchezjb.free.fr/crackmes.de/zuma555-cryptokg1.py I think it generates serials in the way Zuma555 expected it. HMX0101 and fenoloji, can you check if these generated serials are valid for you?
qpt^J 01. Nov 2009	maybe serials doesn't works because returned address to lstrlen() function (its ecx) is generating with name on 004011A7 for each computer that address can be another my address is 7C80BE06
jB_ 01. Nov 2009	You are right, qpt^J. The main problem is here.
Zuma555 Author 01. Nov 2009	Yeah people you are right ecx's return chages from machine to machine. What a shame.... i am sorry to all. Still i have decided to fix this keygen.me regarding to that small hashing problem. here goes the adress for the fixed crackme. http://forum.tuts4you.com/index.php?showtopic=21533&st=0&gopid=103934& (_fixedecx.rar)
andrewl.us Moderator 02. Nov 2009	fenologi: submit (don't link) with tutorial and keygen source please

ZxZ666's Console KeygenMe

Download KeygenMe.zip, 238 kb (password: crackmes.de)
Browse contents of KeygenMe.zip

Simple console KeygenMe written in C++

Rules:
Don't Patch.
Write a KeyGen and a solution.

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: C/C++

Published: 11. Jul, 2013
Downloads: 304

Rating

No votes yet.
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Solutions

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Discussion and comments

iSSoGoo 16. Jul 2013	Am I correct, that the goodboy depends on the username/serial but the badboy is always the same?
imy4ng 17. Aug 2013	What is the correct tip?
eazar001 21. Aug 2013	ZxZ666's code seems to be utilizng Thread Local Storage, I have isolated the address that it is calling back, though I still can't seem to find the area causing trouble, as multiple threads are spawned and I can't even find the appropriate jump.
eazar001 21. Aug 2013	This is not a "level-2 crack", there is self-modifying code in here and a bunch of dead-ends. I have solved "level-3 cracks" in much less time than this one. Has anyone been able to solve this one?

Zyen's KeygenCrackme #1

Download KgeME.zip, 6 kb (password: crackmes.de)
Browse contents of KgeME.zip

A simple KeygenMe, please solution this!

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: (Visual) Basic

Published: 25. Jun, 2008
Downloads: 806

Rating

Votes: 5
Crackme is quite bad.

Rate this crackme:

Solutions

Solution by E1xis, published 01. jul, 2008; download (137 kb), password: crackmes.de or browse.

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Solution by Kalippan, published 01. jul, 2008; download (6 kb), password: crackmes.de or browse.

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Solution by costy, published 01. jul, 2008; download (108 kb), password: crackmes.de or browse.

costy has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

E1xis 28. Jun 2008	Man, what about using English?!
costy 28. Jun 2008	translation Serial NUMERICO Serial must be a number Nombre name Aceptar check No registrado Serial is invalid Registrado Serial is ok

Zyrel's Simple KeygenMe#2

Download KeygenMe#2.zip, 145 kb (password: crackmes.de)
Browse contents of KeygenMe#2.zip

Crackme really easy, suitable for newbies.
The code is a little confusing for a bit more complicated life ;)

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: C/C++

Published: 24. Jan, 2011
Downloads: 2048

Rating

Votes: 3
Crackme is boring.

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Solutions

Solution by Zephy, published 03. feb, 2011; download (13 kb), password: crackmes.de or browse.

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Solution by TripleTordo, published 03. feb, 2011; download (143 kb), password: crackmes.de or browse.

TripleTordo has rated this crackme as nothing special.

Solution by promix17, published 03. feb, 2011; download (147 kb), password: crackmes.de or browse.

promix17 has rated this crackme as nothing special.

The submission of solutions is closed.

Discussion and comments

DoDhLo 25. Jan 2011	The good boy is in spanish :)
promix17 25. Jan 2011	I solve this CrackME. Wait totorial)))
TripleTordo 25. Jan 2011	name:Tordo Serial:138182-86917041 And no, it´s not Spanish. Good boy is in Italian
Zyrel Author 25. Jan 2011	Yeah, in italian ;D @promix: very good ;)
TripleTordo 25. Jan 2011	I suppose that selfkeigening it´s not allowed :P, right?
promix17 25. Jan 2011	Why selfkeigening it´s not allowed???
Zyrel Author 25. Jan 2011	Mmm... why not? :) A keygen is preferred, but also a selfkeigen can be good :)
froechrissi 25. Jan 2011	I have fund a bug in the programm: Take "Thursday" as well as for the name as for the key and the programm crashes :D
TripleTordo 25. Jan 2011	with my full nick, it crashes too "TripleTordo". Thank you for the info Zyrel. Regards.
promix17 25. Jan 2011	With Promix17, too))) I think a lot becouse of it in the beginning. It is not a valid keygenable crackme.
DoDhLo 25. Jan 2011	Submited solution , I hope its accepted :)
promix17 25. Jan 2011	DoDhLo - is it selfkeygen or you reverse generator of keys?
DoDhLo 25. Jan 2011	Its a keygen written in c .
Dodge 26. Jan 2011	Solution: N[] - Name, S - Name Length KEY: Part1"-"Part2 Part2 = (Name[0]Name[0]Name[S-1]Name[S-1]) xor 0xB221 Part1 = Part2/(SUMM(N[i]) xor (SS*S))
Zyrel Author 26. Jan 2011	Even if it was really easy ... well done;)
Dodge 26. Jan 2011	Thank you. It was my first keygen
dyngnosis 27. Jan 2011	I finished the keygen for mine.. was pretty simple but I enjoyed it. Thanks for the fun! I'll write up a tut if no one else is going to.
Zephy 27. Jan 2011	Thanks, nice fun! :-) ...send tut+kg
dyngnosis 27. Jan 2011	I wrote a simple key-gen in C that will take any username and generate a valid key for it. I commented my IDB and copy and pasted what I thought was useful along with other details. I've got a video tutorial in progress as well
Zyrel Author 28. Jan 2011	Thanx to all for spend time on crack it ;)
HonestGamer 16. Feb 2011	The crackme crashes when I try to check my serial.
Cooty125 11. Mar 2011	Oh realy nice KeygenMe :) Cooty 104777-65695256

zyzygygr8's Crackme 1

Download crackme.zip, 2 kb (password: crackmes.de)
Browse contents of crackme.zip

The crackme will display a message . Your task is to change the message to anything and get it displayed without getting an error.

Difficulty: 3 - Getting harder
Platform: Windows 2000/XP only
Language: Assembler

Published: 30. Jul, 2006
Downloads: 508

Rating

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Solutions

Solution by yzhr, published 05. aug, 2006; download (3 kb), password: crackmes.de or browse.

yzhr has rated this crackme as quite nice.

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Discussion and comments

hardcoder 01. Aug 2006	Nice Crack me , I've solved it, I am releasing solution soon
hardcoder 03. Aug 2006	There is a great flaw in this crack me , no need to understand algorithm of whole programme... But Nice playing with CreateRemoteThread.. Really very nice crackme .... hope you fix the flaw in new release
zyzygygr8 Author 04. Aug 2006	yea i noticed that...will surely do that thanks ;)

zyzygygr8's Crackme #2

Download Crackme2.zip, 8 kb (password: crackmes.de)
Browse contents of Crackme2.zip

This is a .NET(v1.1) Crackme. The algorithm is very simple to find but I would want you to patch it. The patch though isnt difficult either. It is a google search away,but you shall learn a thing or 2 from this.

Source Code will be available upon request.

Enjoy

Difficulty: 2 - Needs a little brain (or luck)
Platform: Windows
Language: Unspecified/other

Published: 21. Oct, 2006
Downloads: 617

Rating

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Solutions

Solution by pnluck, published 27. oct, 2006; download (13 kb), password: crackmes.de or browse.

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Send a message to ^DAEMON^ »

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Discussion and comments

HuliGun 21. Oct 2006	Did you try it on Windows XP? Seems, it doesn't work :(
jB_ 21. Oct 2006	It is a .NET crackme. So install the .NET Framwork (v1.1 or higher) then run it again. It should work.
konstAnt 23. Oct 2006	Hey man something's error is my uploading I uploaded the solution for Geeko Naggy and the solution was uploaded for this....
jB_ 23. Oct 2006	Nice crackme, zyzygygr8. Both keygen and patch are easy, but there is a small thing to do with the patch that I never met before (I'm not a big fan of .NET reversing). It took one minute to think about it but nevermind, it was good =)
zyzygygr8 Author 23. Oct 2006	well am i expecting a solution? :D
zairon Moderator 23. Oct 2006	Be patient...
zyzygygr8 Author 23. Oct 2006	hehe, that was meant for jB , because he had solved it :P the team does work at mark speed so cant push you guys :)
janisito 24. Oct 2006	So I figured out the keygen algo and where to patch, but it seams it crashes if I change whatever byte in the exe. Is there some sort of CRC check involved by .NET?
zyzygygr8 Author 24. Oct 2006	.NET is a stack based compiler,so whatever patch you make,should be done taking care of not upsetting the stack.
jB_ 24. Oct 2006	Hmm sorry, remove my previous comment. It gives too much information.
zairon Moderator 24. Oct 2006	As you wish jB_, comment removed.

^DAEMON^'s Crackme 4

Download d4crackme.zip, 9 kb (password: crackmes.de)
Browse contents of d4crackme.zip

Serial

Difficulty: 4 - Needs special knowledge
Platform: Unspecified/other
Language: Unspecified/other

Published: 18. Sep, 2002
Downloads: 1856

Rating

No votes yet.
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Solutions

There are no solutions to this crackme yet. Have you solved it? Please write a tutorial and submit it here!

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Discussion and comments

noreason 08. May 2006	Uhh It took me like 13 seconds to crack this. Put it in the easy catagory
zairon Moderator 08. May 2006	Well, you can patch the crackme in few seconds, 13 are too much. If you have a valid serial... write a tutorial :)
BLODYALBO 07. Nov 2009	Very Very Easy to crack this. Set Je to JNZ.
cobrasniper555 07. Nov 2009	Uses an Rivest Cipher. I'm not sure what kind yet. However, the output is hardcoded, meaning there is only one password. I'm trying to find the key right now but once that is found, it shouldn't be too hard to find the real serial.
qpt^J 07. Nov 2009	all serials with 8 chars in Base10Table has been bruteforced detection: none :)
cobrasniper555 08. Nov 2009	gpt^J, I don't understand what you're saying. I detected a RC5/RC6 signature in the file. Used multiple detectors to confirm. Does he use a Base10 encryption?
qpt^J 08. Nov 2009	sorry, I had to say Base10Char,not Base10Table. Base10Char - it's only nombers 0,1,...,8,9 - I used it for bruteforcing,but I don't succesful About RC5/RC6 - first part RC5 - RC5ENCAB and RC5Encrypt is modified second part is RC6 - RC6ENCRND is modified too
qpt^J 08. Nov 2009	ok, first algo has solved invoke RC6Init,addr Serial,dword ptr szSerial rounds = 4
cobrasniper555 08. Nov 2009	Yeah. The first part I have the source for. I'm currently working on the second part as well. I like your Base10Char idea! =D Is the cipher 64 bits? The preceeding 8 bytes I think are associated with the key for the cipher.

[][][][][]'s EASY keygenme

Download EASY_keygenme.zip, 525 kb (password: crackmes.de)
Browse contents of EASY_keygenme.zip

easy keygenme.
No patching , just write a keygen which generate valid keys.

Difficulty: 1 - Very easy, for newbies
Platform: Windows
Language: Borland Delphi

Published: 20. Mar, 2011
Downloads: 863

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Solutions

Solution by givses, published 15. aug, 2013; download (11 kb), password: crackmes.de or browse.

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Solution by idid231, published 28. apr, 2011; download (688 kb), password: crackmes.de or browse.

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