ET MALWARE PlugX CnC Beacon

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE PlugX CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"?id="; fast_pattern;
    pcre:"/\?id=[a-f0-9]{8}$/";
    http.header;
    content:"Accept|3a 20|*/*|0d 0a|";
    pcre:"/^[^\x3a]+\x3a\x20\d+\r\n[^\x3a]+\x3a\x20\d+\r\n[^\x3a]+\x3a\x20\d+\r\n[^\x3a]+\x3a\x20\d+\r\nUser-Agent\x3a/Ri";
    http.header_names;
    content:!"Accept-";
    content:!"Referer|0d 0a|";
    reference:md5,076ae76dcd0946ff913a9ce033e0ca55;
    classtype:command-and-control;
    sid:2036858; rev:5;
    metadata:attack_target Client_Endpoint, created_at 2015_08_20, deployment Perimeter, performance_impact Significant, confidence Medium, 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;
)