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 | Send a message to coffeebean » View profile of coffeebean » |
Solutions
Solution by draww, published 09. jan, 2010; download (9 kb), password: crackmes.de or browse.
draww has rated this crackme as boring.
Discussion and comments
| BLODYALBO 30. Dec 2009 | name:orhan serial:f4355-76ad-4a1a-bbe3-f72 |
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| 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 :) |
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