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[crackme] Opcode0x90's Challege

 
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opcode0x90
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PostPosted: Tue Mar 06, 2007 10:01 am    Post subject: [crackme] Opcode0x90's Challege Reply with quote

My first crackme. You are allowed to patch it. Wink If you done so, submit a copy of patched crackme as proof.

Have phun.

Note: You have to key in the code in one pass. If you backspace it will considered as wrong. This was a bug, but I am too lazy to fix it. Razz Anyway it wont mess up with the final outcome.
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DeletedUser14087
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PostPosted: Tue Mar 06, 2007 10:11 am    Post subject: Reply with quote

lol,lets give it a try =]
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nix
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PostPosted: Tue Mar 06, 2007 10:12 am    Post subject: Reply with quote

casper the unfriendly ghost giving a try ?
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SunBeam
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PostPosted: Tue Mar 06, 2007 10:45 am    Post subject: Reply with quote

Themida.
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appalsap
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PostPosted: Tue Mar 06, 2007 10:48 am    Post subject: Reply with quote

And once a crackme is packed it loses its crackme title and becomes an unpackme.
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Uligor
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PostPosted: Tue Mar 06, 2007 11:09 am    Post subject: Reply with quote

Done.

EDIT: You might need to refresh if you don't see anything.

Nice encryption keys btw. ;x (The allocated memory ones, not the looping overlapping XOR >=()

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compactwater
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PostPosted: Tue Mar 06, 2007 11:23 am    Post subject: Reply with quote

Dang, didn't even get as chance....

EDIT:
Grammar plz?
"You have Enter the code wrong" Laughing
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SunBeam
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PostPosted: Tue Mar 06, 2007 11:41 am    Post subject: Reply with quote

Good job, Uli Wink I'm still battling its unpacking, rather than reversing in-code Smile
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ottoshafer
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PostPosted: Tue Mar 06, 2007 12:32 pm    Post subject: Reply with quote

what do you guys use to look at the exe file? Sorry for asking such a stupid question, but i want to learn and knowing what tools to use helps alot :S.
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SunBeam
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PostPosted: Tue Mar 06, 2007 12:53 pm    Post subject: Reply with quote

@Opcode0x90: Me and Uligor are arguing on whether you used any protection on the file. To me it looked like Themida, based on file structure and allocations :S Ploks, tell us...
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opcode0x90
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PostPosted: Tue Mar 06, 2007 9:30 pm    Post subject: Reply with quote

@Uligor: Obvious eh? Protection is nothing without enforcement Wink

@appalsap: Its not packed. Not in any sense of encryption or compression.

@Sunbeam: I "borrowed" that trick from Themida. Razz But I didnt protect it using Themida, if thats what you meant.

Anyone willing to reverse the eval function to get the code? Razz

---------------------------------------------------------------------------------------

Update 04/09/2007:

Full solution by alex_ls, finally. Wink

Ignore the false alarm by your AV.
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