full-disclosure - Re: anybody know good service for cracking md5?

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Date: Thu, 4 Feb 2010 13:47:42 +0100
From: netinfinity <netinfinity.securitylab@...il.com>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: anybody know good service for cracking md5?

Pyrit uses CUDA.

On Thu, Feb 4, 2010 at 1:11 PM, Sergio Pelissari <
sergio.pelissari@...teus-security.com> wrote:

> You can try gpu brute-force, where the c/s is bigger than a normal
> quad-core processor.
>
> But you can't use wordlist because isnt make sense compared with c/s you
> try to break a hashe using something like incremental way on JTR.
>
> Actually BT4 comes with a md5_gpu_crack you need a VGA support with CUDA
> or the ATI technology ( i don't remember the name right now )
>
> On Thu, 2010-02-04 at 12:59 +0100, Christian Sciberras wrote:
> > Uh, in the sense that they are finally becoming actually useful...
> >
> >
> >
> >
> >
> > On Thu, Feb 4, 2010 at 12:58 PM, Anders Klixbull <akl@...erian.dk>
> > wrote:
> >         seems to be cropping in?
> >         as far as know rainbow tables has been around for years...
> >
> >
> >
> >
> >
> >         ______________________________________________________________
> >         From: full-disclosure-bounces@...ts.grok.org.uk
> >         [mailto:full-disclosure-bounces@...ts.grok.org.uk] On Behalf
> >         Of Christian Sciberras
> >         Sent: 3. februar 2010 23:02
> >         To: Valdis.Kletnieks@...edu
> >         Cc: full-disclosure@...ts.grok.org.uk
> >         Subject: Re: [Full-disclosure] anybody know good service for
> >         cracking md5?
> >
> >
> >
> >
> >         Actually dictionary attacks seem to work quite well,
> >         especially for common users which typically use dictionary
> >         and/or well known passwords (such as the infamous "password").
> >         Another idea which seems to be cropping in, is the use of hash
> >         tables with a list of known passwords rather then dictionary
> >         approach.
> >         Personally, the hash table one is quite successful, consider
> >         that it targets password groups rather than a load of wild
> >         guesses.
> >
> >         Cheers.
> >
> >
> >
> >
> >         On Wed, Feb 3, 2010 at 10:26 PM, <Valdis.Kletnieks@...edu>
> >         wrote:
> >                 On Wed, 03 Feb 2010 23:42:07 +0300, Alex said:
> >
> >                 > i find some sites which says that they can brute md5
> >                 hashes and WPA dumps
> >                 > for 1 or 2 days.
> >
> >
> >                 Given enough hardware and a specified md5 hash, one
> >                 could at least
> >                 hypothetically find an input text that generated that
> >                 hash.  However, that
> >                 may or may not be as useful as one thinks, as you
> >                 wouldn't have control over
> >                 what the text actually *was*.  It would suck if you
> >                 were trying to crack
> >                 a password, and got the one that was only 14 binary
> >                 bytes long rather than
> >                 the one that was 45 printable characters long. ;)
> >
> >                 Having said that, it would take one heck of a botnet
> >                 to brute-force an MD5 has
> >                 in 1 or 2 days. Given 1 billion keys/second, a true
> >                 brute force of MD5 would
> >                 take on the order of 10**22 years.  If all 140 million
> >                 zombied computers on the
> >                 internet were trying 1 billion keys per second, that
> >                 drops it down to 10**16
> >                 years or so - or about 10,000 times the universe has
> >                 been around already.
> >
> >                 I suspect they're actually doing a dictionary attack,
> >                 which has a good chance
> >                 of succeeding in a day or two.
> >
> >
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> >
> >
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-- 
http://netinfinity-sec.blogspot.com

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