alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg:"ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from|3a|"; nocase; threshold: type threshold, track by_src, count 10, seconds 120; reference:url,doc.emergingthreats.net/2000328; classtype:misc-activity; sid:2000328; rev:12; metadata:created_at 2010_07_30, updated_at 2010_07_30;)
Added 2018-09-13 19:37:03 UTC
Added 2018-09-13 17:52:19 UTC
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg:"ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from|3a|"; nocase; threshold: type threshold, track by_src, count 10, seconds 120; reference:url,doc.emergingthreats.net/2000328; classtype:misc-activity; sid:2000328; rev:12; metadata:created_at 2010_07_30, updated_at 2010_07_30;)
Added 2017-08-07 20:55:11 UTC
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg:"ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from|3a|"; nocase; threshold: type threshold, track by_src, count 10, seconds 120; reference:url,doc.emergingthreats.net/2000328; classtype:misc-activity; sid:2000328; rev:12;)
Added 2011-10-12 19:09:31 UTC
sid:2000328;Triggers on a client response to the SMTP_SERVERS if the SMTP_SERVERS are not in the HOME_NET. Not sure if that was intent.
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ChrisNorthrop - 2016-12-07
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg:"ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from|3a|"; nocase; threshold: type threshold, track by_src, count 10, seconds 120; classtype: misc-activity; reference:url,doc.emergingthreats.net/2000328; sid:2000328; rev:12;)
Added 2011-09-15 14:46:04 UTC
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg:"ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from|3a|"; nocase; threshold: type threshold, track by_src, count 10, seconds 120; classtype: misc-activity; reference:url,doc.emergingthreats.net/2000328; sid:2000328; rev:12;)
Added 2011-09-14 20:33:36 UTC
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg:"ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from|3a|"; nocase; threshold: type threshold, track by_src, count 10, seconds 120; classtype: misc-activity; reference:url,doc.emergingthreats.net/2000328; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/POLICY/POLICY_Unauthorized_SMTP; sid:2000328; rev:12;)
Added 2011-02-04 17:21:12 UTC
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg: "ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from\:"; nocase; threshold: type threshold, track by_src,count 10, seconds 120; classtype: misc-activity; reference:url,doc.emergingthreats.net/2000328; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/POLICY/POLICY_Unauthorized_SMTP; sid:2000328; rev:11;)
Added 2010-06-28 22:46:59 UTC
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg: "ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from\:"; nocase; threshold: type threshold, track by_src,count 10, seconds 120; classtype: misc-activity; reference:url,doc.emergingthreats.net/2000328; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/POLICY/POLICY_Unauthorized_SMTP; sid:2000328; rev:11;)
Added 2010-06-28 22:46:59 UTC
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg: "ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from\:"; nocase; threshold: type threshold, track by_src,count 10, seconds 120; classtype: misc-activity; reference:url,doc.emergingthreats.net/2000328; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/POLICY/POLICY_Unauthorized_SMTP; sid: 2000328; rev:11;)
Added 2009-02-11 19:24:43 UTC
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg: "ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from\:"; nocase; threshold: type threshold, track by_src,count 10, seconds 120; classtype: misc-activity; reference:url,doc.emergingthreats.net/2000328; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/POLICY/POLICY_Unauthorized_SMTP; sid: 2000328; rev:11;)
Added 2009-02-11 19:24:43 UTC
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg: "ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from\:"; nocase; threshold: type threshold, track by_src,count 10, seconds 120; classtype: misc-activity; sid: 2000328; rev:10;)
Added 2008-01-31 18:48:10 UTC
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg: "ET POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from\:"; nocase; threshold: type threshold, track by_src,count 10, seconds 120; classtype: misc-activity; sid: 2000328; rev:10;)
Added 2008-01-31 18:48:10 UTC
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg: "BLEEDING-EDGE POLICY Outbound Multiple Non-SMTP Server Emails"; flow:established; content:"mail from\:"; nocase; threshold: type threshold, track by_src,count 10, seconds 120; classtype: misc-activity; sid: 2000328; rev:9;)
Added 2007-03-12 18:11:47 UTC
added flow, thanks joel
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MattJonkman - 12 Mar 2007
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg: "BLEEDING-EDGE POLICY Outbound Multiple Non-SMTP Server Emails"; content:"mail from\:"; nocase; threshold: type threshold, track by_src,count 10, seconds 120; classtype: misc-activity; sid: 2000328; rev:8;)
Added 2007-03-12 11:00:34 UTC
I added the content:"mail from\:"; nocase; in place of flags S,12. Hopefully this will make the sig more meaningful. It'll only trip is mail is actually passing or being reasonably attempted.
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MattJonkman - 12 Mar 2007
alert tcp !$SMTP_SERVERS any -> !$HOME_NET 25 (msg: "BLEEDING-EDGE POLICY Outbound Multiple Non-SMTP Server Emails"; flags: S,12; threshold: type threshold, track by_src,count 10, seconds 120; classtype: misc-activity; sid: 2000328; rev:7;)