RE: Snort on a Bootable FreeBSD CD to catch Nachi,Blaster & Sobig

["Schmehl, Paul L" <pauls () utdallas edu>]

> -----Original Message-----
> From: Justin Tan [mailto:justin.tan () extol com my] 
> Sent: Thursday, September 04, 2003 8:09 AM
> To: full-disclosure () lists 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 () utdallas edu). 
> Msblaster by Brian Caswell <bmc () sourcefire com> & Nigel 
> Houghton <nigel.houghton () sourcefire 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 () utdallas edu)
Adjunct Information Security Officer
The University of Texas at Dallas
AVIEN Founding Member
http://www.utdallas.edu/~pauls/ 

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