heinz's Fedor Rumin Keygenme 1
| Download fedor_rumin_kgnme.zip, 91 kb (password: crackmes.de) Browse contents of fedor_rumin_kgnme.zip Fedor Rumin Keygenme 1
Difficulty: 5 - Professional problem to solve | RatingWaiting for at least 3 votes View profile of heinz » |
Solutions
Solution by .ZwXxx, published 07. may, 2009; download (448 kb), password: crackmes.de or browse.
.ZwXxx has not rated this crackme yet.
Discussion and comments
| w00b 18. Aug 2008 | either that's a lot of code or my IDA pro needs more signatures.. O_O |
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| chodon 19. Aug 2008 | just wait I'll solve it..... |
| heinz Author 19. Aug 2008 | w00b: what version of IDA do you use? sometimes not signatures but C++ coding experience can help more. and you wrote to me about static linking... i used it for two reasons: 1) i like static linking 2) i don't like stupid messages like "this shit doesn't run on my computer" ;) |
| kao 19. Aug 2008 | How about "this shit crashes on my computer"? ;) On certain keys crackme exits with "This application has requested the Runtime to terminate it in an unusual way." and on certain keys - just gets into eternal loop printing "key1: key1 is bad! ...." It's a bug or a feature? |
| heinz Author 19. Aug 2008 | It's a fuckin bug! I was already asked about this... Unfortunately, i cannot understand why it causes - base64 function or not. Maybe in future i'll fix it and upload a new version. Now i'm going to finish my second keygenme. There will no C++ code, no cryptography and no bugs on key input (i hope ;) I don't think it will be easier but it will be absolutely different... |
| ARCHANGEL 20. Aug 2008 | Maybe it's too hard to crack but for me it's hard to avoid sleeping. It's too boring, sorry heinz, but it's only my opinion |
| w00b 21. Aug 2008 | dont static link and i bet you'll get more people willing to solve heinz. i use IDA 5.2. |
| heinz Author 21. Aug 2008 | okay. when i'll fix input bug, i'll build this keygenme with dynamic linking and re-upload new version here. btw, one cracker already got two keys for two levels. and maybe he even didn't find it boring ;) it's not an argument for static linking, but maybe it's an argument against laziness ;) and i promise, i'll try to make my future crackmes more interesting ;) |
| simonzack Moderator 21. Aug 2008 | also when you don't enter 1-3 when selecting robots it keeps on printing stuff |
| w00b 23. Aug 2008 | heinz, you have excellent stories behind your crackmes.. that what made me download them in the first place. Personally I get overwhelmed easy when I see calls within calls within calls within calls.. that's a lot of work :) |
| user2k 11. Oct 2008 | wOOb: i use ida too (idal). and found this keygenme best so far [3 days of solving] 3rd robot now.maked flirt sigs for mi...... downloaded reference manual. so far username encoded... heinz: 1' more keygenmes with static linking [linux wine likes that :)] 2' with this keygenme i learned a lots of stuff in c++ and learned that heinz likes loops. 3 'more "cast" could help sometimes, movsx could f... up the byte sometimes... 4' what keygenme u want to see, static linked with mir.... or what ? |
| Numernia Moderator 12. Oct 2008 | Yes, this keygenme/crackme is nice, original and the (cryptosystem) for robot 3 is funny. |
| user2k 15. Oct 2008 | almost done, only one problem, calculation base from given lucas(), no idea how :/ xgcd(modinv), and powmod are easy with given values, but lucas ? |
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