hasherezade's Feed the Ghost
| Download Ghost.zip, 2158 kb (password: crackmes.de) Browse contents of Ghost.zip Hi :)
Difficulty: 4 - Needs special knowledge | RatingWaiting for at least 3 votes View profile of hasherezade » |
Solutions
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Discussion and comments
| BoRoV 14. Feb 2012 | Unpacking is no difficulty, unpacked a few minutes. |
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| hasherezade Author 14. Feb 2012 | congrats BoRoV :) i hope You will like the second part. i placed some hints inside, have You found? |
| darkelf 15. Feb 2012 | Yes, unpacking it was not that hard, but I have a problem with the keyfile. Even if the keyfile is present, the crackme will only complain about the missing .dll and even if the .dll is present and has a function "_secret........" (<- the dots are on purpose) in it, the crackme won't say it's the wrong .dll but completely ignore it. Is that the intended behavior? |
| hasherezade Author 15. Feb 2012 | Yes, it is intended behaviour. If the key is valid then you get the message: "You managed to produce the key... but my DLL is still missing!" Otherwise, it is ignored. |
| smael 16. Feb 2012 | another hint maybe 0 a 1 b 2 c 3 d 4 e 5 k 6 l 7 m 8 n 9 o 0A v 0B w 0C x 1 f 2 g 3 h 4 i 5 j 6 p 7 r 8 s 9 t 0a u 0b y 0c z |
| bike 16. Feb 2012 | Hello. About the key file. I see that from the key it generates a matrix and then another algorithm modifies that matrix (something like Conway's game of life). So reversing those 2 algos should give me the key but i just can't figure out that "game of life" thingy :). That should be possible right? Or am i heading in the wrong direction? |
| hasherezade Author 17. Feb 2012 | that's right bike :) (you have a point for Google searching skills :P ) now try to find out the rules, which this "game of life" follows. and - important thing - describe in the solution, how did You analysed it :) |
| hasherezade Author 26. Mar 2012 | Please don't give up! So many hints are there... And more You can find in the web... |
| bike 11. Apr 2012 | I didn't give up, i've been busy with things lately. Anyway the dll is done and working, but i am still stuck at the game of life :D, i will look into it again. |
| hasherezade Author 11. Apr 2012 | Well, you contradict yourself. It's impossible to create a working DLL without proper analysis of the used algorithm. Moreover, without analysing it, it's impossible to see the similarity between it and the game of life algo. I think enough time had passed, so i will better give the solution stright away - for those who are interested and haven't seen yet. It's here: http://www.secnews.pl/2011/07/01/rozwiazania-konkursu-pimp-my-crackme/ If anyone wants to see the description in english, let me know and I will prepare :) |
| hasherezade Author 22. Apr 2012 | So... Here goes the solution in english: http://hshrzd.wordpress.com/2012/04/16/ghost_crackme/ |
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