Penetration Testing mailing list archives

Re: Format of SAM File


From: Ron <ron () skullsecurity net>
Date: Thu, 09 Jul 2009 15:06:19 -0500

Hernandez IV, Miguel wrote:
All,

Looking for a reference that describes the format of the windows SAM
file.  From what I can tell, the first column is the username and third
column is the password hash, but I want to know what information is
contained in the other columns.  Google searches on "format windows SAM
file", "understand windows SAM file", and other related searches have
proved frustrating.  I should mention that the SAM file was obtained
using pwdump6 in case that is relevant.  The format I am seeing is as
follows:

Username:number:password hash:another hash?:blank:blank:blank

Any help is much appreciated.

Miguel

Hi Miguel,

There's no "standard" format, but the format that's most often used (by pwdump and fgdump, for example) is:

username:rid:lanman:ntlm:::

rid is basically the user id on the system -- 500 = admin, 501 = guest, 1000+ = standard users.

lanman and ntlm are two different types of hashes -- lanman is weak, ntlm is reasonable.

I'm not sure what, if anything the last three spots are.

Hope that helps!

Ron

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