#alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"ET DELETED SMTP US Secret COMINT"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*(COMINT|SI)[\s\w,/-]*(?=//(25)?X[1-9])/ism"; reference:url,doc.emergingthreats.net/bin/view/Main/2002428; classtype:policy-violation; sid:2002428; rev:3; metadata:created_at 2010_07_30, updated_at 2010_07_30;)

Added 2018-09-13 19:37:56 UTC

Added 2018-09-13 17:52:47 UTC

#alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"ET DELETED SMTP US Secret COMINT"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*(COMINT|SI)[\s\w,/-]*(?=//(25)?X[1-9])/ism"; reference:url,doc.emergingthreats.net/bin/view/Main/2002428; classtype:policy-violation; sid:2002428; rev:3; metadata:created_at 2010_07_30, updated_at 2010_07_30;)

Added 2017-08-07 20:55:57 UTC

##alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"ET DELETED SMTP US Secret COMINT"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*(COMINT|SI)[\s\w,/-]*(?=//(25)?X[1-9])/ism"; reference:url,doc.emergingthreats.net/bin/view/Main/2002428; classtype:policy-violation; sid:2002428; rev:3;)

Added 2011-10-12 19:11:39 UTC

##alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"ET DELETED SMTP US Secret COMINT"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*(COMINT|SI)[\s\w,/-]*(?=//(25)?X[1-9])/ism"; classtype:policy-violation; reference:url,doc.emergingthreats.net/bin/view/Main/2002428; sid:2002428; rev:3;)

Added 2011-09-14 21:50:29 UTC

##alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"ET DELETED SMTP US Secret COMINT"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*(COMINT|SI)[\s\w,/-]*(?=//(25)?X[1-9])/ism"; classtype:policy-violation; reference:url,doc.emergingthreats.net/bin/view/Main/2002428; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/POLICY/POLICY_Classified_Information; sid:2002428; rev:3;)

Added 2011-02-04 17:21:50 UTC

#alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"ET POLICY SMTP US Secret COMINT"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*(COMINT|SI)[\s\w,/-]*(?=//(25)?X[1-9])/ism"; classtype:policy-violation; reference:url,doc.emergingthreats.net/bin/view/Main/2002428; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/POLICY/POLICY_Classified_Information; sid:2002428; rev:3;)

Added 2009-02-10 20:53:05 UTC

#alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"ET POLICY SMTP US Secret COMINT"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*(COMINT|SI)[\s\w,/-]*(?=//(25)?X[1-9])/ism"; classtype:policy-violation; reference:url,doc.emergingthreats.net/bin/view/Main/2002428; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/POLICY/POLICY_Classified_Information; sid:2002428; rev:3;)

Added 2009-02-10 20:53:05 UTC

#alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"ET POLICY SMTP US Secret COMINT"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*(COMINT|SI)[\s\w,/-]*(?=//(25)?X[1-9])/ism"; classtype:policy-violation; sid:2002428; rev:2;)

Added 2008-01-31 18:48:08 UTC

#alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"ET POLICY SMTP US Secret COMINT"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*(COMINT|SI)[\s\w,/-]*(?=//(25)?X[1-9])/ism"; classtype:policy-violation; sid:2002428; rev:2;)

Added 2008-01-31 18:48:08 UTC

#alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"BLEEDING-EDGE POLICY SMTP US Secret COMINT"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*(COMINT|SI)[\s\w,/-]*(?=//(25)?X[1-9])/ism"; classtype:policy-violation; sid:2002428; rev:1;)