Re: Windows XP / 2K3 Default Users

[jmk <jmk () foofus net>]

On Tue, 2006-10-31 at 17:27 -0700, Thor (Hammer of God) wrote:
> Maybe I'm just in a different environment, but when I see people report
> "routine" cracking SAM's, it really makes we wonder who the client-base is.
> I think the last time I was paid for any work with LM cracking was over 10
> years ago.  I've been turning off LM since Win2k came out, and have been
> telling people to use pass-phrases instead of passwords since Win2000
> allowed 126 character passcodes. Even something as simple as "my dog has
> fleas" couldn't be rainbow cracked with anything I've seen out there.  Of
> course, when you have a pass phrase like "OK, this is my passphrase--crack
> THIS 1 homeboy!" Then the whole thing goes out the window.
>
> That's what I was on about- while I think rainbow tables are neat, I've
> really not had much use for them given their size, having to have admin
> access to get the SAM anyway (for win machines) and how easy it is to thwart
> them.  But that's just me ;)

Unfortunately, it seems that the vast majority of clients I work with
still have LM hashes enabled and usually some relatively weak passwords.
John typically is able to crack the passwords quickly and, when it
can't, Rainbow tables work. I'm hopeful that we're slowly getting them
educated though.

We did run into a situation recently where a compromised workstation
contained an interesting account with only a NTLM hash. In order to use
that hash against other hosts, I've modified Samba to simply pass it.
Samba's "net" command can do lots of cool stuff, like add local user
accounts. My updated patch is available, if anyone wants it:

http://www.foofus.net/jmk/passhash.html

Joe


-- 
jmk <jmk () foofus net>
Foofus Networks


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