ratsoul's CrkMe #1
| Download CrkMe#1.zip, 41 kb (password: crackmes.de) Browse contents of CrkMe#1.zip a) find a valid: name/serial
Difficulty: 4 - Needs special knowledge | Send a message to ratsoul » View profile of ratsoul » |
Solutions
Solution by __imp__, published 06. nov, 2007; download (112 kb), password: crackmes.de or browse.
__imp__ has rated this crackme as awesome.
Discussion and comments
| antisec 15. Oct 2007 | anyone working on this ? |
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| ratsoul Author 16. Oct 2007 | any feedback? questions? |
| DigitalAcid 16. Oct 2007 | I looked at it a bit and left it. Trying some more now, looks interesting since we aren't allowed to patch =)... |
| noah 24. Oct 2007 | interesting indeed... spent some time finding out the input format of the serial. Looks like some sort of command string that does some operations with a buffer, but i on the first sight it looks rather complicated. Guess it takes a lot time finding out what's the exact purpose of every operator. Maybe there's a trick... any hints? |
| ratsoul Author 25. Oct 2007 | Think about a puzzle... |
| noah 29. Oct 2007 | is somebody else still working on this? |
| Zaphod 30. Oct 2007 | I'm working on it but I think it is a tough job. There is SO much code to analyze... |
| noah 30. Oct 2007 | You're right. But there must be some other way but to analyize hundreds of MOVs to a buffer... As ratsoul said, think about a puzzle, but i really don't get the idea. what's your opinion ratsoul? |
| ratsoul Author 30. Oct 2007 | don't think about the serial as the result of an algorithm but as the algorithm itself :) |
| Zaphod 31. Oct 2007 | Interesting, ratsoul, the serial being the algorithm itself - are you saying that we don't need to map all the shuffling around of those numbers in the buffer? Because that would be a LOT of work... |
| unicorn 31. Oct 2007 | The serial may be the solution to some problem, like N-Queen problem :) |
| ratsoul Author 31. Oct 2007 | don't think at "low-level" ;) |
| __imp__ 06. Nov 2007 | I've submitted the solution. Very nice crackme! |
| ratsoul Author 06. Nov 2007 | excellent work __imp__ :) |
| Zaphod 10. Nov 2007 | My congratulations to ratsoul for writing an excellent crackme - and to _imp_ for solving it and explaining the solution so well. P.S. It is the hardest level 4 crackme I have seen...:) |
| ratsoul Author 11. Nov 2007 | @Devoney, you are off topic. Post removed. |
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