From: Brendan Dolan-Gavitt (mooyix@gmail.com)
Date: Mon Oct 30 2006 - 22:29:42 EST
You're probably correct in assuming that it's "silly LM hash
cracking".However, that has nothing to do with syskey protection.
Syskey provides essentially no protection now that the algorithm has
been reverse engineered. Look into bkhive and samdump2; it's quite
simple to boot a live linux distro, dump the un-syskeyed hashes (all
you need are the SAM and SYSTEM hives), and then crack the "silly LM
hash"--which is still on by default after all these years.
-Brendan
On 10/30/06, Thor (Hammer of God) <thor@hammerofgod.com> wrote:
> You "routinely" crack passwords on SAM's that are SYSKEY'd by default
> (128-bit) with rainbow tables? XP/2k3 has syskey on by default... And any
> password over 14 characters automatically clear the LM hash, even if you
> have not turned it off (which I can't imagine anyone not doing.)
>
> So, I'm guessing that the "rainbow table" hubbub is all 40-bit, or silly LM
> hash cracking, right? Or am I missing something here?
>
> t
>
>
>
> On 10/26/06 2:07 PM, "ep" <captgoodnight@hotmail.com> spoketh to all:
>
> > I crack these routinely when pentesting/playing, granted, it's by pushing
> > the sam through rainbow tables, thus admin access...
> > Basically, any sam once in hand, is cracked these days via rainbowtables.
> > There're ways to prevent this from happening, but most admins don't go that
> > extra step...
> >
> > --cg
> >
> > -----Original Message-----
> > From: listbounce@securityfocus.com [mailto:listbounce@securityfocus.com] On
> > Behalf Of Joey Peloquin
> > Sent: Wednesday, October 25, 2006 12:38 PM
> > To: s-williams@nyc.rr.com; Pen-Testing
> > Subject: Re: Windows XP / 2K3 Default Users
> >
> > s-williams@nyc.rr.com wrote:
> >> Hello list this might be an easy question to answer but have anyone
> >> been sucessful in using windows built in default accounts when doing a
> >> password audit. I
> > know most
> >> xp machines has (help assitant and support_xxxxxxxx). Is their a
> >> default
> > list out
> >> there some where with various vendor OS passwords, or a way to figure
> >> out the password for these accounts.
> >> Sent via BlackBerry from T-Mobile
> >
> > You can try to crack them through normal means, but it'd likely be a futile
> > act since a) they are randomized and *extremely* complex (as far as I
> > recall) and b) even my ~13 year old knows to restrict these accounts. There
> > are clueless admins out there though, so, *shrug*.
> >
> > -jp
> >
> >
> >
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