alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE CozyDuke APT HTTP POST CnC Beacon"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?"; fast_pattern; pcre:"/\.php\?$/"; http.header; content:"Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|User-Agent|3a 20|"; depth:61; http.request_body; pcre:"/^\w+=(?:[a-zA-Z0-9/+=]{1,30}&\w+=)?[a-zA-Z0-9+/]{0,13}[A-Z]{200}/"; http.header_names; content:!"Accept"; content:!"Referer|0d 0a|"; reference:url,securelist.com/blog/69731/the-cozyduke-apt/; reference:md5,98a6484533fa12a9ba6b1bd9df1899dc; classtype:targeted-activity; sid:2020964; rev:5; metadata:attack_target Client_Endpoint, created_at 2015_04_22, deployment Perimeter, deprecation_reason Performance, performance_impact Significant, signature_severity Major, tag c2, updated_at 2024_04_15, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)