alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspicious User-Agent (record)"; flow:established,to_server; http.user_agent; content:"record"; fast_pattern; bsize:6; reference:md5,c00ee58c2ec98724a1e865cb91703ff1; classtype:trojan-activity; sid:2036956; rev:1; metadata:created_at 2022_06_09, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_09, reviewed_at 2025_07_14;)