bugtraq - snort rules for ICQ http/https tunnels

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Message-ID: <00ea01c3fae8$466c86a0$1864640a@rdis.ru>
Date: Tue, 24 Feb 2004 18:09:55 +0300
From: "Alexander Antipov" <antipov@...urityLab.ru>
To: <full-disclosure@...ts.netsys.com>
Cc: <bugtraq@...urityfocus.com>
Subject: snort rules for ICQ http/https tunnels

Hi!
From KasperskyLab: 'Bizex' worm attacks ICQ users -
http://www.kaspersky.com/news.html?id=4272424

Rules for snort to deny ICQ via proxy and proxy chains: (more
information can be found here http://securitylab.ru/40960.html):

# icq.rules 
# snort rules for ICQ http/https tunnels 
# (c)ded by asu4ka 2003. 
# v 0.0.0.1 

var PR_IP x.x.x.x 
var PR_TCP 8080 

alert tcp any any -> $PR_IP $PR_TCP (msg: "ICQ HTTPS/HTTP _basic_,
mf!";\ 
flow: to_server, established; content: "ICQBasic";) 

alert tcp any any -> $PR_IP $PR_TCP (msg: "ICQ HTTPS _key_, mf!";\ 
flow: to_server, established; content: "<key>"; content: "</key>";
nocase;) 

alert tcp $PR_IP $PR_TCP -> any any (msg: "ICQ HTTP _aim/http_, mf!";\ 
flow: from_server,established; content: "AIM/HTTP"; nocase;)

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