full-disclosure - Snort on a Bootable FreeBSD CD to catch Nachi,Blaster & Sobig

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Message-ID: <871080DEC5874D41B4E3AFC5C400611E06B476B9@UTDEVS02.campus.ad.utdallas.edu>
From: pauls at utdallas.edu (Schmehl, Paul L)
Subject: Snort on a Bootable FreeBSD CD to catch Nachi,Blaster & Sobig

> -----Original Message-----
> From: Justin Tan [mailto:justin.tan@...ol.com.my] 
> Sent: Thursday, September 04, 2003 8:09 AM
> To: full-disclosure@...ts.netsys.com
> Subject: [Full-Disclosure] Snort on a Bootable FreeBSD CD to 
> catch Nachi,Blaster & Sobig
> 
> 
> On Thu, 2003-09-04 at 20:45, Paul Schmehl wrote:
> >Just curious - what sigs are you using for detection?
> 
> Nachi & Sobig.F - by you, Paul Schmehl(pauls@...allas.edu). 
> Msblaster by Brian Caswell <bmc@...rcefire.com> & Nigel 
> Houghton <nigel.houghton@...rcefire.com>
> (http://www.snort.org/snort-db/sid.html?sid=2192)
> 
> Nachi and Sobig.F tested, works fine. Great job there. Only 
> problem is with a possible false positive (Sobig.F sig) with 
> Crystal Reports listening oo port 8998.

I've also seen a handful of hits when a host queries DNS and happens to
do that on 8998/UDP.

Paul Schmehl (pauls@...allas.edu)
Adjunct Information Security Officer
The University of Texas at Dallas
AVIEN Founding Member
http://www.utdallas.edu/~pauls/