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RE: [SPAM] RE: interesting trojan found
From: "Todd Towles" <toddtowles () brookshires com>
Date: Thu, 21 Oct 2004 11:40:59 -0500

I see.

For some reason, I was thinking he couldn't see it in systemprocess, but
now that I think about it, you are correct. So it was hiding but not
very well, therefore not the true trojan/rootkit hybrid. Thanks Peter.

-----Original Message-----
From: Peter Kruse [mailto:kruse () krusesecurity dk] 
Sent: Thursday, October 21, 2004 11:33 AM
To: Todd Towles; full-disclosure () lists netsys com
Subject: SV: [SPAM] RE: [Full-disclosure] interesting trojan found

Hi Todd,

But if it is a rootkit, does it not hide from normal AV scanning?

Nope, you'll see it in the systemprocess, but since it's 
active in memory, you won't be able to end it.

The trojan is a RDBot variant (Spybot). Like other variants, 
from this string, it spreads across local and remote 
networks. It's uses several exploits to compromise unpactched 
MS Windows boxs, as well as searches for shares with weak 
passwords. When executed, it creates a mutex "[rxBot v0.6.5 
pk + ftpd]". If another instance of this worm is already 
running, it will exit. The malware carries a backdoor that 
allows a malicious user to control the infected host through 
IRC channels. As stated in the first posting, it droppes a 
copy of itself to the windows system folder. Nextup it 
modifies registry with several runas keys under the value 
"update run msword".

This RDbot includes a keylogger, that will log all keyboard 
activity and save this to a text file. A remote user can 
collect this information through IRC and possibly gain access 
to others services.

Med venlig hilsen // Kind regards

Peter Kruse,                        Voice: (+45) 88136030
Security- and virusanalyst,         Cel    (+45) 28490532
CSIS ApS                            Fax    (+45) 28176030
http://www.csis.dk                  E-mail pkr () csis dk

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