downloadbrowseThorwak's Thorwak Crackme02 (Win32)

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June 11 2008

Thorwak CrackMe #02

My second crackme. It should be at least a little bit harder than my last one, I hope :)

No rules, do anything you want. Just find out the password that will let you see the GoodBoy message.

You may find bruteforcing is the way to go, and I have made sure it is possible in a reasonable amount of time if making a couple of not too far fetched assumptions. It's probably possible to solve this one with fairly basic cryptoanalysis as well
though. OK, enough with the hinting, get cracking :)


Written in C++, WIN32. Tested on a couple of different Windows XP machines.

Difficulty: 3 - Getting harder
Platform: Windows
Language: C/C++

Published: 11. Jun, 2008
Downloads: 461

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Solutions

Solution by PeterPunk, published 27. jun, 2008; download (6 kb), password: crackmes.de or browse.

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Discussion and comments

Thorwak
Author
25. Jun 2008		Noone working on this one? Is it too difficult for a lvl 3 or just boring? :P
DigitalAcid
25. Jun 2008		Looks like another bruteforceme :/.
Because you ask so nice, i'll try to solve it.
lilxam
25. Jun 2008		I'm trying to solve it too, but i don't think a direct bruteforce is possible because of the too many possibilities. So i've begin to analyse the algo and i think i'm not far to arrive to reverse it.
DigitalAcid
25. Jun 2008		Yeah, if you try all possible combinations it will take about 48939 days or 134 years, if my calculations are correct =).
I could be alot shorter if we only try lower and/or uppercase or so.
I looked at the algo, but don't know if it is reversable.
Maybe we can find the first couple of bytes by guessing what they should be and therefor find the first letters of the password =).
Thorwak
Author
25. Jun 2008		lilxam: Will be interesting to hear what you find!

DigitalAcid: I think you might be on to something :P
lilxam
25. Jun 2008		erf one of my tehories was wrong :/ So it makes me thinking that the algo isn't reversible. And for the first bytes, i don't see how you want to guess it. I hope someone will make a solution (DigitalAcid ?) cause i'm very curious to see it.
PeterPunk
25. Jun 2008		Oh Yeah. Catched!!!
DigitalAcid
27. Jun 2008		Nice solution.
I'm glad now I don't have to try to solve it anymore :).
I tried an inline bruteforcer, but it's not doing things right.
Thorwak
Author
27. Jun 2008		PeterPunk: Well done, and nice tutor!

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