alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Vawtrak/NeverQuest CnC Beacon"; flow:established,to_server; flowbits:set,ET.Vawtrak; http.method; content:"POST"; http.uri; content:".php?"; content:"/0"; content:"=0000"; fast_pattern; content:"=?"; pcre:"/\.php\?[a-z]+=0000[a-fA-F0-9]{4}&[a-z]+=\?[A-F0-9]+&[a-z]=\d{4}&[a-z]=\d{4}$/"; http.header; content:"Accept"; http.content_type; content:"application/x-www-form-urlencoded"; bsize:33; http.header_names; content:!"Referer|0d 0a|"; reference:md5,1b820dda5833f802be829d468884884e; classtype:command-and-control; sid:2025089; rev:6; metadata:attack_target Client_Endpoint, created_at 2015_08_25, deployment Perimeter, performance_impact Moderate, signature_severity Major, tag c2, updated_at 2024_04_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)