Snort mailing list archives
Re: MS-SQL Worm propagation -false positive
From: Martin Olsson <elof () sentor se>
Date: Fri, 9 Jan 2004 10:06:47 +0100 (CET)
On Thu, 8 Jan 2004, Natalie Keller wrote:
Over a 5 minute interval Snort captured more than 500 scans with the classic signature for MS-SQL Worm propagation. The originating ip belonged to a laptop running XP with all up-to-date connected to the network over VPN 3-DES tunnel. The laptop was brought to IT for cleaning. The laptop was found to be up-to-date with all patches/service packs. The drive was scanned with Norton Anti-virus with all current signatures and came up clean. The laptop has been back on the network for 2 days with no further incidents. This would appear to be a false positive. Is there any other steps that could have been taken to track down and account for the original cause for this incident? Suggestions welcome.
Are you sure that the originating IP wasn't spoofed with the laptops IP address? If you have the alerts logged in pcap format and your snort sensor was connected to the same network segment as the offending machine, use tcpdump -e to find the MAC-address of the source. Then find the machine with this MAC address, that's the infected one. /Martin ------------------------------------------------------- This SF.net email is sponsored by: Perforce Software. Perforce is the Fast Software Configuration Management System offering advanced branching capabilities and atomic changes on 50+ platforms. Free Eval! http://www.perforce.com/perforce/loadprog.html _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
Current thread:
- MS-SQL Worm propagation -false positive Natalie Keller (Jan 08)
- Re: MS-SQL Worm propagation -false positive Martin Olsson (Jan 09)
- <Possible follow-ups>
- RE: MS-SQL Worm propagation -false positive larosa, vjay (Jan 08)