Full Disclosure: Re: Full-Disclosure Digest, Vol 89, Issue 15 suspicion of rootkit (Alexandru Balan)

[Kurt Buff <kurt.buff () gmail com>]

A better way of proceeding on this, assuming you can afford the time,
is to boot from of the many live boot CDs (UBCD4Win, BartPe, various
Linux-based rescue disks) to scan the disk while the suspect OS is not
in memory. Those CD images either come with, or can be caused to
contain, various AV packages. Make sure the packages used are current,
and scan away.

Kurt

On Thu, Jul 12, 2012 at 6:57 AM, phocean <0x90 () phocean net> wrote:
> The only antivirus I have tried so far is Microsoft Security Essentials. And
> it finds nothing, which I certainly don't trust at all.
> Especially because it shows a very unusual certificate alert during the
> setup.
> I also scanned a few files that I chose (some dll and services) on
> VirusTotal with no results except some false positive. I also had a look on
> the disassembly of these files.
> So, I don't know what it is, but if it is a rootkit it is not a trivial one
> and I am afraid it is smarter than me :)
>
> --- phocean
>
>
> Le 12 juil. 2012 à 15:33, Mikhail A. Utin a écrit :
>
>
>
> -----Original Message-----
> From: full-disclosure-bounces () lists grok org uk
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> full-disclosure-request () lists grok org uk
> Sent: Thursday, July 12, 2012 4:40 AM
> To: full-disclosure () lists grok org uk
> 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 () gmail com>
> Subject: Re: [Full-disclosure] suspicion of rootkit
> To: phocean <0x90 () phocean net>
> Cc: full-disclosure () lists grok org uk, Valdis.Kletnieks () vt edu
> Message-ID: <C0574EE4-8509-4FF4-AB60-565D0A256E11 () gmail 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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