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RE: Windows XP salted hashed verification of domain passwords
From: "Javier Jarava" <jjarava () gmail com>
Date: Thu, 8 Mar 2007 13:29:02 +0100

 
Hi!!

A couple of pointers on the isse of *how* windows stores passwords, how they
are "hashed", etc. that I believe might be interesting for this argument...

Security Management - October 2005
Frequently Asked Questions About Passwords
http://www.microsoft.com/technet/community/columns/secmgmt/sm1005.mspx

Interesting... And at the same time somewhat alarming, the mention of the
fact that it's not *that* important or relevant to crack the hashes to get
the original password, as there are tools that make use of the hashes
themselves..

And a 3-part article on the issue of passwords vs. pass phrases. Not
entirely related to the thread, but interesting read...

Security Management - October 2004
The Great Debates: Pass Phrases vs. Passwords. Part 1 of 3
http://www.microsoft.com/technet/community/columns/secmgmt/sm1004.mspx

Security Management - November 2004
The Great Debates: Pass Phrases vs. Passwords. Part 2 of 3
http://www.microsoft.com/technet/community/columns/secmgmt/sm1104.mspx

Security Management - December 2004
The Great Debates: Pass Phrases vs. Passwords. Part 3 of 3
http://www.microsoft.com/technet/community/columns/secmgmt/sm1204.mspx

Just my 0.002

-----Original Message-----
From: listbounce () securityfocus com [mailto:listbounce () securityfocus com]
On Behalf Of Matthew Webster
Sent: Saturday, March 03, 2007 12:12 AM
To: pen-test
Subject: Windows XP salted hashed verification of domain passwords

Folks,

    For domain accounts, the passwords are not kept on a system.  The
verification is salted and hashed with md4 twice.  I am trying to assess
the following risks.  1) What is the danger that that verification could
be misused on another system?  2) From that salted, hashed verification,
can the password be derived?  How likely is this?

     Also, how would one perform a pen test against those salted, hashed
verifications?  Lets assume in the registry no one was ignorant enough
to put the registry key which provides the password.

Thanks,

Matt



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