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Featured Replies

Posted

http://i.imgur.com/FYfGNhl.png

Not a difficult one keygenme/crackme written in C#.

Gold - write a keygen

Silver - find a valid Name-Key

Bronze - patch assembly and get Good boy message

KeyGenME_SHADOW.rar

Very nice! :)

Attached is KG and uncommented source. But you must understand how this keygenme works - otherwise the source won't make any sense to you.

KG_KeyGenME_SHADOW.zip

 

EDIT: Merry Christmas everyone! Enjoy this time with your family... ;)

Edited by kao

  • Author
6 minutes ago, kao said:

Very nice! :)

Attached is KG and uncommented source. But you must understand how this keygenme works - otherwise the source won't make any sense to you.

KG_KeyGenME_SHADOW.zip

 

EDIT: Merry Christmas everyone! Enjoy this time with your family... ;)

Nice, kao! Deserved gold :)

Bronze =(

KeygenME--.exe

  • 2 weeks later...

Hello.

I tried out this keygenme. So it is executing shellcode, which would display the good boy message.
The shellcode is decrypted with hard-coded key; some bytes are replaced with other bytes generated from the name/serial combo, a check is done 

hgwbucf.png

and finally executed. 

So it is possible to have certain name/serial combo to pass all the checks and yet segfault on running, as the generated shellcode is not proper.

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