GPU Bruteforce

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GPU Bruteforce

Post by kmaid on Tue Jan 18, 2011 8:49 pm
([msg=52401]see GPU Bruteforce[/msg])

Hey Guys.

I have 'acquired' some salted MD5 hashes (mmm tasty) in the md5(md5($salt).md5($password)) format which I now need to break.

I have looked at barsWF however my ATI 6780 is not supported, lame. I have also looked into using EC2 and CUDA Multiforcer however the above md5 format is not supported. I don't see allot of GPU powered alternitives and my Q6600 is a little slow for this kind of task. Short of hiring a botnet anyone have any suggestions?

peace.
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Re: GPU Bruteforce

Post by fabianhjr on Wed Jan 19, 2011 7:39 am
([msg=52426]see Re: GPU Bruteforce[/msg])

Step one: google the hashes
Step two: search in hash cracking websites.
Step three: Use HashCat to break it
Step fourth: if not possible use http://www.freerainbowtables.com/
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Re: GPU Bruteforce

Post by kmaid on Wed Jan 19, 2011 7:25 pm
([msg=52465]see Re: GPU Bruteforce[/msg])

I tired crypto haze and the obvious googling

Hashcats a good idea as it atleast supports the correct md5 format although is not GPU accelerated. Free rainbow tables sucks imho but worth a go incase of a collision. I am in the midst of conning some bot net breaking time out of a friend so hopefully it wont be an issue. Thanks for the advice though

*edit*

Acording to teh l33t sysadmin at work john the ripper is cuda GPU supported so should be good for EC2. Hmm interesting i wonder what will be cheaper.
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Re: GPU Bruteforce

Post by insomaniacal on Wed Jan 19, 2011 8:50 pm
([msg=52470]see Re: GPU Bruteforce[/msg])

Well, considering that John the Ripper is free, I'd try that in your scenario.
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Re: GPU Bruteforce

Post by fabianhjr on Thu Jan 20, 2011 12:34 pm
([msg=52512]see Re: GPU Bruteforce[/msg])

GPUs are way faster. My 5870 does 310000000 SHA-2(256) hashes/sec.
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Re: GPU Bruteforce

Post by Middle on Sun Feb 06, 2011 1:42 pm
([msg=53225]see Re: GPU Bruteforce[/msg])

Hey i am in desperate need of cracking a SHA256!

I have looked all over the Internet looking for a solution, and that is how i came across this thread.

fabianhjr wrote:GPUs are way faster. My 5870 does 310000000 SHA-2(256) hashes/sec.


I have the same card as you, could you possibly explain what tool you used? It is really really bugging me!

Any ways here are the hashes, in case anyone feels like trying to crack them for me:


7fcd3df7dc2fff173c22ea6450ede4f11b3e27c7923816aab660d474e27df8c2

74760f2eba09a7d4ddbb3cd0c47f0078fadaab4a9dc47a67cc1265a4ba90220

Thanks a lot!
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Re: GPU Bruteforce

Post by fabianhjr on Sat Apr 23, 2011 8:33 pm
([msg=56650]see Re: GPU Bruteforce[/msg])

Middle wrote:Hey i am in desperate need of cracking a SHA256!<br><br>I have looked all over the Internet looking for a solution, and that is how i came across this thread. <br><br><br><br>I have the same card as you, could you possibly explain what tool you used? It is really really bugging me!<br><br>Any ways here are the hashes, in case anyone feels like trying to crack them for me:<br><br><br>7fcd3df7dc2fff173c22ea6450ede4f11b3e27c7923816aab660d474e27df8c2 <br><br>74760f2eba09a7d4ddbb3cd0c47f0078fadaab4a9dc47a67cc1265a4ba90220 <br><br>Thanks a lot!

Now, I will be honest with you.
2(Bit)**256(Bits) / 340000000(Being optimistic with a 900 OC core/900 UC memory clocks) / 60(seconds in a minute) / 60(minutes in an hour) / 24(hours in a day) / 356(days in a year) / 100(years in a century) = 1.10722589 × 10^59

Basically, forget about it.
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