Focus on Microsoft
S-1-5-21... Jul 21 2008 04:56PM
Red Cat (redcat9876 gmail com) (3 replies)
RE: S-1-5-21... Jul 23 2008 04:21PM
Nick Vaernhoej (nick vaernhoej capitalcardservices com)
Re: S-1-5-21... Jul 21 2008 06:22PM
Mike Moratz-Coppins (mike mikeymike org uk)
Re: S-1-5-21... Jul 21 2008 05:29PM
Dennis Li (dennis li sh gmail com) (1 replies)
RE: S-1-5-21... Jul 21 2008 06:37PM
Erik Boles (eboles mxlogic com) (1 replies)
Also -- if the user is deleted from A-D that had access to that folder it will show the SID rather than the name of the user as that container for the user still exists, it just doesn't have a name any longer.

-----Original Message-----
From: listbounce (at) securityfocus (dot) com [email concealed] [mailto:listbounce (at) securityfocus (dot) com [email concealed]] On Behalf Of Dennis Li
Sent: Monday, July 21, 2008 11:30 AM
To: Red Cat
Cc: focus-ms (at) securityfocus (dot) com [email concealed]
Subject: Re: S-1-5-21...


Normal, the user like 'S-1-5....' is a domain account. After your
computer is added into a domain (AD), the administrator account of the
domain is added to your local administrators group automatically. And
when you browse the security property of the folder, OS will query the
real name of that domain user. Before the query is done, you'll see
the name is 'S-x-x-xxx'.


On Tue, Jul 22, 2008 at 12:56 AM, Red Cat <redcat9876 (at) gmail (dot) com [email concealed]> wrote:
> Hey,
> I have a question on something I saw on my computer today. I'm on a
> Windows Vista. I was looking at some of the "properties" of some
> folders in my "Public" folder and clicked on the "Security" tab. Then
> I noticed my usual login user, "Everyone", and one other user, whose
> id seemed to be S-1-5-21...and some numbers. Then after a couple
> moments it turned into the user, "None" with (My computer name\None)
> right next to it. I looked at the permissions it was given and
> apparently it was given "Special Permissions." I was pretty sure I
> didn't and never had created a user named "None". But I still checked
> the Users folder to see if there was indeed a user named "None". There
> wasn't. I even checked to see if there were any hidden users using the
> "view hidden folder option", but there was no uesr by the name of
> "None". I looked on google for some time but all I managed to find was
> that it could possibly be a remnant from a past OS or something. But
> this computer had Vista installed on it when I got it. Also, it might
> be some sort of guest that was made for my computer or something. My
> own speculation is that it has something to do with the fact that I
> used Cygwin to open up a tarball and create this folder. Anyway, what
> does this user mean? Why does it have special permissions? Is it some
> sort of sign that I have a back door somewhere on my computer or that
> I'm being keylogged or something? Thanks in advance.

[ reply ]
Re: S-1-5-21... Jul 21 2008 06:50PM
Charles Hardin (fonestorm gmail com) (1 replies)
RE: S-1-5-21... Jul 21 2008 07:20PM
Remco (remco bluedome net)


Privacy Statement
Copyright 2010, SecurityFocus