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My first ReverseMe

 
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igoticecream
Grandmaster Cheater Supreme
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PostPosted: Tue Sep 29, 2009 8:51 pm    Post subject: My first ReverseMe Reply with quote

Language: C
Difficulty: easier than hard
Goal: Patch the message
Other info: Patch it using just 1 byte (this mean you can't "nop" a call because you are patching 5 bytes)

If you did it, please upload the patched ReverseMe to see your solution Razz


http://www.sendspace.com/file/4b5edb
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smartz993
I post too much
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Joined: 20 Jun 2006
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Location: USA

PostPosted: Tue Sep 29, 2009 9:42 pm    Post subject: Reply with quote

http://rapidshare.com/files/286745245/ReverseMe1.rar.html

Nice.

Patch it from patching itself to call 00401000 (offset 2F to 6B which is where flow after messagebox continues), which is the xor encrypted messagebox proc.
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igoticecream
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PostPosted: Tue Sep 29, 2009 10:07 pm    Post subject: Reply with quote

Or change the push 0 to push 1 on the first parameter of messageboxa.

Nice =)
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