alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE FakeAV Variant CnC Beacon"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?id="; fast_pattern; pcre:"/\.php\?id=\d+$/"; http.header; content:!"Content-T"; http.request_body; pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/"; http.header_names; content:!"User-Agent|0d 0a|"; content:!"Accept"; content:!"Referer|0d 0a|"; reference:md5,693ca229558aab99e0a9d3385cacc40c; classtype:command-and-control; sid:2020706; rev:5; metadata:attack_target Client_Endpoint, created_at 2015_03_18, deployment Perimeter, performance_impact Significant, signature_severity Major, tag c2, updated_at 2024_04_22, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)