_sb_ Posted August 12, 2011 Share Posted August 12, 2011 Hello This series started for the ones trying to learn crypto cracking. Please solve #1 first and then try this one and the following series. Notice: this is crypto 4 newbies and is growing in difficulty as you walk into higher series. Enjoy this crypto 4 newbies #2, and notice:-No patch-No serial fish-Stand alone keygen only!Hint: Differently from #1 this crackme contains also standard ****.456.zip 1 Link to comment Share on other sites More sharing options...
_sb_ Posted August 12, 2011 Author Share Posted August 12, 2011 I would also like if the person who solved it, could also write a few lines on how did he/she solved it anyways. Link to comment Share on other sites More sharing options...
Teddy Rogers Posted August 13, 2011 Share Posted August 13, 2011 The [keygenme] tag has been added to your topic title. Please remember to follow and adhere to the topic title format - thankyou! [This is an automated reply] Link to comment Share on other sites More sharing options...
_sb_ Posted August 13, 2011 Author Share Posted August 13, 2011 sorry, XD Link to comment Share on other sites More sharing options...
N1ghtm4r3 Posted August 13, 2011 Share Posted August 13, 2011 Bah, you call this crypto?N1ghtm4r337C753D521A9B4AF 2 Link to comment Share on other sites More sharing options...
_sb_ Posted August 13, 2011 Author Share Posted August 13, 2011 *4 NEWBIES*, I wonder if you can read Link to comment Share on other sites More sharing options...
N1ghtm4r3 Posted August 13, 2011 Share Posted August 13, 2011 I wonder if you got sense. 2 Link to comment Share on other sites More sharing options...
_sb_ Posted August 13, 2011 Author Share Posted August 13, 2011 what do you exactly mean? Link to comment Share on other sites More sharing options...
_sb_ Posted August 15, 2011 Author Share Posted August 15, 2011 If this crackme is not soved, then I am afraid I will not continue to make anymore series on this issue, as I assume people are not interested. Dispite the fact that 'Nightmare' solved the crackme that will not necessarily imply that this crackme is actually solved... The spanning algorithm should not be a brutte forcer of any kind, unfortunantly I have only included a 32 bit value problem wich is solvable without much effort even with a brute forcer, yet this is not a proper solution. Link to comment Share on other sites More sharing options...
qpt^J Posted August 15, 2011 Share Posted August 15, 2011 here's keygen just as i've promised for todaybut to be honest crackme#1 was ALOT more tricky than this onekeygen.rar Link to comment Share on other sites More sharing options...
Saduff Posted August 15, 2011 Share Posted August 15, 2011 Here's mine. Thanks for the challenge! Keygen.zip Link to comment Share on other sites More sharing options...
deepzero Posted August 15, 2011 Share Posted August 15, 2011 ehm, would someone mind explaining to me how this stuff works? so it takes the the first dword of the md5 hashed username, imuls it with the first dword of the serial, and the result gotta be 1: serialpart * md5(name)part = ?????????00000001 for "deepzero": BF4D86B5 * E225B79D = 1 == A8FEA05600000001 and yes, i cheated and bruteforced it. so how can i solve this? ?? * E225B79D = ?????????00000001 Link to comment Share on other sites More sharing options...
HMX0101 Posted August 15, 2011 Share Posted August 15, 2011 deepzero, its basic stuff:http://en.wikipedia.org/wiki/Modular_multiplicative_inverseIn this case, modulo = 0x100000000. 1 Link to comment Share on other sites More sharing options...
ChOoKi Posted August 16, 2011 Share Posted August 16, 2011 My try solution.rar Link to comment Share on other sites More sharing options...
_sb_ Posted August 17, 2011 Author Share Posted August 17, 2011 OK, first of all I would like to thank you all for liking/praticing with this crypto crackme #2 from this series.(remember you can also solve #1 if you feel this one has thaught you something).qptj, dont feel oblied to solve this series just because I solved your crackme 8. Yes its true I dont like crackmes very much but yours was worth it.To all of those that also solved this crackme thank you, unfortunantly I can't verify the submited solutions because I am on hollyday and I am using an hotel computer for this. But as long as it is not bruteforcing, your solution is ok. To those who are stuck somewhere follow HMX0101's link and think how come the oprations are done in Z(2^32). Next crackme should include a biglib problem, probably custom cooked cryptography. I would advice you to study the rsa problem, and also dont forget what you used until now on this series, good bye 1 Link to comment Share on other sites More sharing options...
KKR_WE_RULE Posted August 17, 2011 Share Posted August 17, 2011 The algo is nearly the same as the 'Funny Keygenme'. The only difference is that name is used here. Waiting for your next challenge Btw, I like your way. Please continue with this series br KKR Link to comment Share on other sites More sharing options...
_sb_ Posted August 18, 2011 Author Share Posted August 18, 2011 never looked at that one , not a great fan of crackmes, there are a few decent ones only... ok thanks for liking Link to comment Share on other sites More sharing options...
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