Versions (2)
Version DetailsCurrent
Rev: 1 • Sep 11, 2025, 12:00 PMET INFO Observed Online Email Hosting Provider Domain (mail .privateemail .com in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed Online Email Hosting Provider Domain (mail .privateemail .com in TLS SNI)"; flow:established,to_server; tls.sni; bsize:21; content:"mail.privateemail.com"; fast_pattern; reference:md5,65863868eacac1fe96fcf7f168b4baaa; classtype:misc-activity; sid:2064575; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_09_11, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_09_11;)
Sep 11, 2025, 12:00 PM
Sep 11, 2025, 12:00 PM
Sep 11, 2025, 9:34 PM
Sep 12, 2025, 9:34 PM
rules/emerging-info.rules