mndg's gama
| Download 02_crackme_stage3_gama.zip, 8 kb (password: crackmes.de) Browse contents of 02_crackme_stage3_gama.zip From a serie of crackmes I'm developing for my wargame page
Difficulty: 2 - Needs a little brain (or luck) | RatingWaiting for at least 3 votes View profile of mndg » |
Solutions
Solution by baderj, published 13. nov, 2014; download (158 kb), password: crackmes.de or browse.
baderj has not rated this crackme yet.
Discussion and comments
| korsader 09. May 2014 | Only bruteforce - deeper |
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| idid231 10. May 2014 | printable or not? not sure what's purpose of this crackme |
| vani172 10. May 2014 | Am I just supposed to get a valid serial message? If so then this is too easy. |
| Duraven 10. May 2014 | I would say the goal of this crackme is to get the password |
| Seonid 12. May 2014 | It is, however the OP does not make that clear and the solution itself requires a brute-force approach once the encoding function is identified as it in effect creates a hash. Personally I stopped when I RE'd that function as it's not RE any more beyond the trivial patch to get the GoodBoy. |
| Unknown Coder 15. May 2014 | <h1>Very easy</h1> |
| mtriple 23. May 2014 | i spent lot time on this code with no success, im noob but i pass the wrong mssg which is considered as true JNZ value, i think the file has been patched with wrong statement, i cannt analyze this one cmp eax, 0B528B18Bh its do this : 1- MOV DWORD PTR DS:[ESI+26],EAX how i can check ESI value ? 2- some or and xor but i cant analyze it . |
| korsader 24. May 2014 | I found the right key - eDDQDR |
| Duraven 24. May 2014 | @korsader Congratz. I tested all the possibilities for 5 characters but couldn't be bothered to run brute-forcer for more, how long did it take your prog to get the correct password? |
| korsader 25. May 2014 | @Duraven Len key = 6 Alphabet 'abcdefghijklmnopqrstuvwxyz' find key 30 second |
| mtriple 25. May 2014 | so any idea of how ? did u do it by analyzing or some tools ? i think the point is to analyze doesnt it ? |
| mtriple 25. May 2014 | tha key is valid but its not the right key , check this owner site : http://yoire.com/challenges/reversing/pe.stage3/02_crackme_gama.php i tested ur pass is not correct |
| korsader 26. May 2014 | right key-deeper check this site ))) |
| Duraven 27. May 2014 | @korsader Could you pm me with your brute-forcer algo? I remember when I quickly wrote a brute-forcer, it was taking much longer |
| korsader 27. May 2014 | http://rghost.net/55889184 |
| DreamiX 28. May 2014 | I did not find key but i pathed it and now it always says that key is right. Solution: =Original bytes= 8B B1 28 B5 45 16 6A 40 =Replaces bytes= 8B B1 28 B5 90 90 6A 40 |
| Duraven 30. May 2014 | @korsader Sorry to post it that late, I've been busy a little. Thanks a lot for your code, I though there must be a trick, but the only "trick" is the limited character space, thanks again buddy. For a key space, i.e., all visible ascii characters 32-128, brute-force would take much longer :P |
| Felipeninja 09. Jun 2014 | Hi could you pm me with your brute-forcer algo again please ??? |
| amigossq 28. Oct 2014 | some keys are : cBPoG\:s`dedPer HdtgnrdWXeDDPdR |
| baderj 28. Oct 2014 | Nice crackme. It can be solved without brute forcing. |
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