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[decryptme]decrypt then crack.

 
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haha01haha01
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PostPosted: Tue Aug 21, 2007 2:22 am    Post subject: [decryptme]decrypt then crack. Reply with quote

crackme made in visual basic,but i didnt use a normal method to calculate password.
encrypted with The Challenger.

if no1 will decrypt it in a while ill post decrypted version Wink
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SunBeam
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PostPosted: Tue Aug 21, 2007 2:57 am    Post subject: Reply with quote

The purpose of a CrackMe is to SEE something RUNNING, in order to crack it. What you posted isn't even a valid PE32 application T_T. Also, no one will decrypt it without knowing the encryption algorithm. And that's exactly as same as hakkairu posted the passworded archive earlier. Good luck trying...
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haha01haha01
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PostPosted: Tue Aug 21, 2007 4:52 am    Post subject: Reply with quote

w\e heres the decrypted file.
not very hard tho. its visual basic but not the original method.
i think its something liek that vb crackme was just posted here.
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zart
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PostPosted: Tue Aug 21, 2007 7:46 am    Post subject: Reply with quote

pretty simple - just peek at;

00402913 . FF15 3C104000 CALL DWORD PTR DS:[<&MSVBVM60.__vbaStrCm>; MSVBVM60.__vbaStrCmp



and see "your string" which is unicode in ECX being compared to unicode "myencryptionrox" in edx


did you use encryption at all? i didn't really even look. i just see a bunch of unicode strings - bait?

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haha01haha01
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PostPosted: Tue Aug 21, 2007 9:00 am    Post subject: Reply with quote

no not realy.
also id like to show u that program, the challenger.
i dunno what its good 4 but well it gives good encryption.
http://www.encryption-software.de/challenger/download/Challenger-Setup.exe
i tried to replace the stupid api calls of VB with simple commands like mov and cmp but everything i touched brought me to an access violation. i guess vb is not compatible for editing it on asm.
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zart
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PostPosted: Tue Aug 21, 2007 9:08 am    Post subject: Reply with quote

haha01haha01 wrote:
no not realy.
also id like to show u that program, the challenger.
i dunno what its good 4 but well it gives good encryption.
http://www.encryption-software.de/challenger/download/Challenger-Setup.exe
i tried to replace the stupid api calls of VB with simple commands like mov and cmp but everything i touched brought me to an access violation. i guess vb is not compatible for editing it on asm.


saddly i can't read/speak german...

yea vb isn't too friendly being edited - though you can easily make them harder by not storing things in unicode - and not comparing values directly... i'll whip something up and post it during my lunch break to show you a decent (hopefuly) vb crackme

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haha01haha01
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PostPosted: Tue Aug 21, 2007 10:08 am    Post subject: Reply with quote

na its fine.
im moving on to delphi soon anyway.
and btw u dont have to know german O_O this is direct download and u can choose english.
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Noz3001
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PostPosted: Tue Aug 21, 2007 10:21 am    Post subject: Reply with quote

haha01haha01 wrote:
no not realy.
also id like to show u that program, the challenger.
i dunno what its good 4 but well it gives good encryption.
http://www.encryption-software.de/challenger/download/Challenger-Setup.exe
i tried to replace the stupid api calls of VB with simple commands like mov and cmp but everything i touched brought me to an access violation. i guess vb is not compatible for editing it on asm.


VB isn't compatible with anything. It should just die.
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PostPosted: Tue Aug 21, 2007 10:27 am    Post subject: Reply with quote

myencryptionrox
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