Versions (3)
Version DetailsCurrent
Rev: 3 • Mar 2, 2011, 12:00 PMET DELETED Unknown Malware Keepalive
alert tcp $HOME_NET any -> $EXTERNAL_NET 81 (msg:"ET DELETED Unknown Malware Keepalive"; flow:established,to_server; content:"keepalive"; nocase; depth:9; pcre:"/keepalive([0-9]{4}|\x7c[0-9]{4})/i"; threshold:type limit, track by_src, count 1, seconds 60; classtype:trojan-activity; sid:2012409; rev:3; metadata:created_at 2011_03_02, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)
Mar 2, 2011, 12:00 PM
Jul 26, 2019, 12:00 PM
Sep 21, 2024, 3:00 AM
Dec 17, 2025, 11:34 PM
rules/emerging-deleted.rules