Date: Thu, 12 Jul 2012 09:33:05 -0400
From: "Mikhail A. Utin" <mutin@...monwealthcare.org>
To: "full-disclosure@...ts.grok.org.uk" <full-disclosure@...ts.grok.org.uk>
Subject: Re: Full-Disclosure Digest, Vol 89,
 Issue 15 suspicion of rootkit (Alexandru Balan)



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Subject: Full-Disclosure Digest, Vol 89, Issue 15

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I've had very similar case of downloading software and getting a malware. I wanted just to get it fixed, so wheither a virus, or worm, or rootkit I do not know.
Symptoms were disabled Windows update and Windows networking. TCP in general worked.
I found malicious files (just a few) using one of security tools running under Linux CD-bootable to check consistency of Windows files. First I tried three AV systems (F-Secure, Kaspersky and Symantec), but they were useless. Finally, from Linux I was able to find files having inconsistent attributes, as far as I remember - the size and modification date.

Nothing of particular, but: AV systems identify less than 90% of malware (both forward and backward tests), when downloading freeware  stuff a virtual machine is the best option, and if after just installing of freeware Windows screw up, it is obvious what is the reason for.

Mikhail

----------------------------------------------------------------------

Message: 1
Date: Thu, 12 Jul 2012 00:46:33 +0300
From: Alexandru Balan <jaymzu@...il.com>
Subject: Re: [Full-disclosure] suspicion of rootkit
To: phocean <0x90@...cean.net>
Cc: full-disclosure@...ts.grok.org.uk, Valdis.Kletnieks@...edu
Message-ID: <C0574EE4-8509-4FF4-AB60-565D0A256E11@...il.com>
Content-Type: text/plain; charset="iso-8859-1"

Tried checking it with an AV ? 
http://quickscan.bitdefender.com 

On Jul 12, 2012, at 12:06 AM, phocean wrote:

> The machine is Windows XP SP3 quite up-to-date, but not fully. Except that Windows Update is not working anymore.
> One of the symptoms. 
> 
> I described the issues there:
> http://www.phocean.net/2012/06/30/rootkit-in-my-lab.html
> http://www.phocean.net/2012/07/11/rootkit-in-my-lab-part-ii.html
> 
> You will see why some symptoms make me think about a rootkit.
> 
> You are right, it could be some Windows being messed up.
> But it actually happened on a pretty fresh install: I finished setting XP and tens of analysis tools (I aimed this box to be my fresh reversing system).
> So even if possible, it sounds strange that a machine gets corrupted so quickly. And of course, I suspect some of these tools, got from multiple downloads.
> At last, I could analyse them one by one of course, but there are many so it would be painful (and I am not sure that I kept all setups).
> 
> --- phocean
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