downloadbrowseskirby'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.

Rate this crackme:

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Solutions

Solution by HMX0101, published 02. mar, 2008; download (175 kb), password: crackmes.de or browse.

HMX0101 has rated this crackme as quite nice.

Submit your solution »

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.

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