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Security Incidents: Re: Firewall hits/unknown ports

Re: Firewall hits/unknown ports

From: Nick FitzGerald <nick_at_virus-l.demon.co.uk>
Date: Thu, 8 Nov 2001 07:45:08 +1200

<bonk_at_webchat.chatsystems.com> wrote:

> Anyone know what trojans/backdoors run on 22634, 24544 and 29319 ?
> Snort.org doesn't list these.

This style of reply is seldom accepted for posting, but it should be
remembered that only knowing the attempted port is a **very, very
poor** diagnostic. Most of the modern RATs, bots, etc and
nearly all of the widely used ones, allow the ports they run on to be
configured. Thus, only knowing "port X was scanned" and "port X is
the default port for <some RAT>" does not tell you much. Further,
few of the IDSes, etc do traffic analysis to better detect which RAT,
bot, etc may be involved *and* of those that do, few do so for more
than a tiny fraction of the RATs.

-- 
Nick FitzGerald
Computer Virus Consulting Ltd.
Ph/FAX: +64 3 3529854
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Received on Nov 08 2001
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