Snort mailing list archives
WEB-CLIENT Excel malformed FBI record - False positive?
From: Jesper Skou Jensen <jesper.skou.jensen () uni-c dk>
Date: Mon, 07 Jul 2008 14:51:16 +0200
Hi there, I've recently deployed a passive Snort sniffer next a bunch of webservers, and I'm getting quite a lot of "WEB-CLIENT Excel malformed FBI record" reports. I can't quite figure out if it's false positives or not. I've configured the IP's of the webservers as $HOME_NET, but when I look in "rules/web-client.rules" it states "alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any" which I read as the $HOME_NET is the destination, BUT when I read the Snort syslog message below, it looks like the "attack" originates from my webserver. Is that a correct assumption? (Timestamp and IPs have been changed to protect the innocent! :-) Jul 7 13:37:00 sysloghost snort: [1:12256:1] WEB-CLIENT Excel malformed FBI record [Classification: Attempted User Privilege Gain] [Priority: 1]: {TCP} 10.1.1.1:80 -> 10.2.2.2:1229 10.1.1.1 is the webserver 10.2.2.2 is some client Can any of you guys enlighten me? -- Jesper S. Jensen Basisnet og Sikkerhed Uni-C - Ã…rhus, Danmark ------------------------------------------------------------------------- Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 _______________________________________________ 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:
- WEB-CLIENT Excel malformed FBI record - False positive? Jesper Skou Jensen (Jul 07)
- Re: WEB-CLIENT Excel malformed FBI record - False positive? Jack Pepper (Jul 07)
- Re: WEB-CLIENT Excel malformed FBI record - False positive? List Subscriptions (Jul 07)
- Re: WEB-CLIENT Excel malformed FBI record - False positive? Jesper Skou Jensen (Jul 08)
- Re: WEB-CLIENT Excel malformed FBI record - False positive? Jack Pepper (Jul 08)
- Re: WEB-CLIENT Excel malformed FBI record - False positive? Jesper Skou Jensen (Jul 08)
- Re: WEB-CLIENT Excel malformed FBI record - False positive? Jesper Skou Jensen (Jul 08)
- Re: WEB-CLIENT Excel malformed FBI record - False positive? Jack Pepper (Jul 08)
- Re: WEB-CLIENT Excel malformed FBI record - False positive? Jesper Skou Jensen (Jul 08)
- Re: WEB-CLIENT Excel malformed FBI record - False positive? Joel Esler (Jul 08)
- Re: WEB-CLIENT Excel malformed FBI record - False positive? Jack Pepper (Jul 08)
- Re: WEB-CLIENT Excel malformed FBI record - False positive? Jack Pepper (Jul 08)