Snort mailing list archives
MP3's are evil... Searching for traffic based upon uploaded file type...
From: "Isherwood, Jeffrey - IS" <Jeffrey.Isherwood () itt com>
Date: Thu, 5 Aug 2010 11:16:43 -0400
Trying to fine tune some rules and remove false positives... I was originally using the rule below to try and detect possible policy violations of anyone uploading MP3s from the internal network to the internet: alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"Policy: Forbidden File Transfer from Internal to External"; flow:established,to_server; content:".mp3"; nocase; priority:3; classtype:misc-activity; sid:1000005; gid:1; rev:4; ) It was catching false positives and so I'm trying this one, but something seems to be lacking... alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"Policy: Forbidden File Transfer from Internal to External"; flow:established,to_server; pcre:"/\w+\.mp3($|\W|\")/i"; priority:3; classtype:misc-activity; sid:1000005; gid:1; rev:7; ) ________________________________ This e-mail and any files transmitted with it may be proprietary and are intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error please notify the sender. Please note that any views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of ITT Corporation. The recipient should check this e-mail and any attachments for the presence of viruses. ITT accepts no liability for any damage caused by any virus transmitted by this e-mail.
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Current thread:
- Rule efficiency Isherwood, Jeffrey - IS (Jul 23)
- Re: Rule efficiency Alex Kirk (Jul 23)
- Re: Rule efficiency Korodev (Jul 23)
- Re: Rule efficiency Isherwood, Jeffrey - IS (Jul 23)
- Re: Rule efficiency Alex Kirk (Jul 23)
- Re: Rule efficiency Joel Esler (Jul 23)
- Re: Rule efficiency Alex Kirk (Jul 23)
- Re: Rule efficiency waldo kitty (Jul 23)
- Re: Rule efficiency Isherwood, Jeffrey - IS (Jul 23)
- Re: Rule efficiency Alex Kirk (Jul 23)
- MP3's are evil... Searching for traffic based upon uploaded file type... Isherwood, Jeffrey - IS (Aug 05)
- Re: MP3's are evil... Searching for traffic based upon uploaded file type... Joel Esler (Aug 05)
- Re: MP3's are evil... Searching for traffic basedupon uploaded file type... Castle, Shane (Aug 05)
- Re: MP3's are evil... Searching for traffic based upon uploaded file type... Joel Esler (Aug 05)
- Re: MP3's are evil... Searching for traffic based upon uploaded file type... Isherwood, Jeffrey - IS (Aug 05)
- Re: MP3's are evil... Searching for traffic based upon uploaded file type... Jason Haar (Aug 05)
- Re: MP3's are evil... Searching for traffic based upon uploaded file type... Joel Esler (Aug 05)
- Re: Rule efficiency Alex Kirk (Jul 23)
- Re: Rule efficiency waldo kitty (Jul 23)
- Re: Rule efficiency Isherwood, Jeffrey - IS (Jul 26)
- Re: Rule efficiency waldo kitty (Jul 26)
- Re: Rule efficiency Isherwood, Jeffrey - IS (Jul 26)