RE: ntds.dit, john and pwdump2

["Dave Dyer" <ddyer () enspherics com>]

Thanks for the suggestion, Brian, but a couple of items:

1. I don't normally make a habit of downloading standalone executables
directly from the internet unless they're signed or from a trusted source.
Nevertheless, my curiosity got the best of me, so I downloaded it to a
non-sensitive machine to try it out.

2.  When I ran the executeable, samdump was looking for a file samexport.txt
which it couldn't find.  Turns out that samdump.exe needs samexport.txt to
run.  Samexport.txt seems to be an export of the registry "accounts" key
which can then be turned into a hashed file by samdump.  The following
command can export the registry values:

regedit.exe /E /A samexport.txt "HKEY_LOCAL_MACHINE\SAM\SAM\Domains\Account"

So, that being said, this doesn't really work for my purposes.  I don't
really want to crack the passwords on my machine, but from this file I have
from the client.  I even, as a lark and for want of some better option,
tried to rename the NTDS.DIT file to samexport.txt (yes, I knew it wouldn't
work, but I wanted to see what would happen), and ran samdump against it
with no luck whatsoever.  In fact, if you want a very subtle DOS, it crashed
the hell out of an XP box I was running.

Anyway, doesn't look like samdump is going to do the trick, unless I'm
missing something?

Any other suggestions?


-----Original Message-----
From: Klotz, Brian [mailto:Brian_Klotz () heald edu] 
Sent: Monday, January 24, 2005 11:38 AM
To: 'ddyer () ciber com'; security-basics () securityfocus com
Subject: RE: ntds.dit, john and pwdump2


Try samdump.exe  

http://www.insidepro.com/download/samdump.exe

Brian Klotz - CCNA, CCAI, Network+, Security+, Linux+ Networking Instructor
Heald College Portland Campus http://www.heald.edu
503.229.0492

-----Original Message-----
From: Dave Dyer [mailto:ddyer () ciber com]
Sent: Thursday, January 20, 2005 10:28 AM
To: security-basics () securityfocus com
Subject: ntds.dit, john and pwdump2

Hello List,

I am cracking a password file for a client, and have a copy of the NTDS.DIT
file from a domain controller (win2k/Active Directory). We do not have
access to L0phtcrack currently, and I'm on a deadline. I was going to use
John the Ripper with some plugins written by 3rd parties to crack the
password file, but apparently the NTDS.DIT file isn't really a hashed file
that John can read

After some research, I found that you can use PWDUMP2 to actually export the
user/pw information on the DC to a hashed file that you can then crack with
John (even if syskey is used after SP2). However, in order for PWDUMP to
work, you have to run it as an administrator from the DC itself, where it
injects its own .dll into the lsass.exe process, which I no longer have
access to. My question is this:

Does anyone know if there is a way to extract the user/pw information from
the NTDS.DIT file (rather than from lsass.exe on the server) into a hashed
file that I can then crack with John?

If not, does anyone have any other suggestions on what I can do with this
NTDS.DIT file to crack it?

Thanks in Advance,

dave

***********

Dave Dyer

<mailto:ddyer () enspherics com <mailto:ddyer () enspherics com> > 

"So you'll bring experts in to water the company's plants but you'll do the
security thing yourself?"

-QinetiQ in the Financial Times



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