[Snort-users] MS-SQL Worm Signature

Frank Reid fcreid at ...691...
Sat Jan 25 09:49:01 EST 2003


Thanks, Patrick... I was able to cobble together this same signature as
a rough cut, although I reversed the rule to look only for traffic
originating from hosts on my own backbone.  The pure volume of traffic
inbound to my networks makes it impractical to log... the only solution
was to block all 1434/udp at the border routers.  The content field may
be irrelevant, as I'm dropping two packets from this ACL for every
single ip transaction permitted!

Pretty impressive worm!

Frank

-----Original Message-----
From: Patrick S. Harper - CISSP [mailto:lists at ...4250...] 
Sent: Saturday, January 25, 2003 12:20 PM
To: 'Frank Reid'
Subject: RE: [Snort-users] MS-SQL Worm Signature


 
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alert udp $EXTERNAL_NET any -> HOME_NET 1434 (msg: "New MS Sql Worm";) 


This is what I am using, I am not the best at writing snort rules and
since I do not have any mssql where my sensor is it is picking up only
worm traffic

- -----Original Message-----
From: snort-users-admin at lists.sourceforge.net
[mailto:snort-users-admin at lists.sourceforge.net] On Behalf Of Frank Reid
Sent: Saturday, January 25, 2003 8:07 AM
To: '-=Quequero=-'; snort-users at lists.sourceforge.net
Subject: RE: [Snort-users] MS-SQL Worm Signature


This rule gives me an error (aside from the trailing semicolon)...
anyone have a working version?  Thanks!

Frank

- -----Original Message-----
From: snort-users-admin at lists.sourceforge.net
[mailto:snort-users-admin at lists.sourceforge.net] On Behalf Of
- -=Quequero=-
Sent: Saturday, January 25, 2003 9:16 AM
To: snort-users at lists.sourceforge.net
Subject: [Snort-users] MS-SQL Worm Signature


hi all, i've done a simple signature for detecting this worm, it should 
work (or at least, it works here :P)

alert udp $EXTERNAL_NET any -> $HOME_NET 1434 (msg:"HELL-SQL Worm Scan";

flow:to_server,from_server; 
content:"|684765745466b96c6c|";classtype:attempted-admin)

If there are errors plz correct me, thanx a lot to all, happy fishing :)


- -=Quequero=-
SpP/Member www.spippolatori.com
UIC Founder www.quequero.tk
Linux Registered User #207978 



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