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SID: 2002442 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 3Jul 30, 2010, 12:00 PM

ET DELETED SMTP US Secret NOFORN

alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"ET DELETED SMTP US Secret NOFORN"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*NOFORN[\s\w,/-]*(?=//(25)?X[1-9])/ism"; classtype:policy-violation; sid:2002442; rev:3; metadata:created_at 2010_07_30, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)

Jul 30, 2010, 12:00 PM

Jul 26, 2019, 12:00 PM

Sep 21, 2024, 3:00 AM

Oct 3, 2025, 8:34 PM

rules/emerging-deleted.rules