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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.

alex_ls has rated this crackme as nothing special.

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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 :)

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