rutio's ZerialMe #1
| Download 1.zip, 27 kb (password: crackmes.de) Browse contents of 1.zip This is my first KeygenMe.
Difficulty: 2 - Needs a little brain (or luck) | RatingWaiting for at least 3 votes View profile of rutio » |
Solutions
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Discussion and comments
| rutio Author 31. May 2010 | No solution guys? Come on! :D |
|---|---|
| BoRoV 31. May 2010 | nope, I know man who brute your crackme :D |
| Coderess 01. Jun 2010 | I know too who brute :) |
| Coderess 03. Jun 2010 | It's crackme cannot be solved - only patch |
| c0mmunique 06. Jun 2010 | This doesn't seem possible without patching. Regardless of what (valid) inputs I plug into it, it seems as though eax and ebp-8 will always contain the same values. |
| jE! 08. Jun 2010 | @ 0040CFE0 are valid input for serial |
| Coderess 09. Jun 2010 | @jE! What that mean? |
| jE! 09. Jun 2010 | i mean at 0040CFE0 are valid chars for serial input. |
| govule 10. Jun 2010 | can make keygen for this but would have to brute the possible serials. "may" be possible to work out non-brute alg. but not worth the hassle. would be interested to see if the writer could make a non-brute keygen himself :) |
| simonzack Moderator 11. Jun 2010 | I bruteforced 00000000..FFFFFFFF there is no valid pass |
| Coderess 11. Jun 2010 | @Rutio correct your crackme and reupload new version |
| govule 11. Jun 2010 | Thanks last two posters for saving me time. I was going to have a go tonight at bruteforce keygen. I did think there was a hell of a lot of XOR'ing so there could probably only be 1 valid serial. |
| jE! 14. Jun 2010 | when proc@004011B0 start, [ebp-2C] is "dirty". i have there pointer: 00403308. then begins hash calculation on this three char: 40|33|08. this looks more mistake then trick. (additionally we can overwrite stack by serial-chars.. but dunno..) |
| jE! 14. Jun 2010 | then at same [ebp-2C] will placed Name-chars & there will NO calculation on those. So maybe here things are inversed: Hash-calculation should be after get-Name. |
| jE! 17. Jun 2010 | further, Serial-convertinc proc misses conversion result & stores 01000000 every time. so, if Name hash missed & Serial conversion missed, Keygen is impossible. but it is called "my first KeygenMe" by author. bcoz stack can be overwritten by 28 chars, we can force good message. but 2 chars are non-ascii. so what are thinking Mods? |
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