ET MALWARE Win32/Trapwot FakeAV Post Infection CnC Beacon

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Trapwot FakeAV Post Infection CnC Beacon";
    flow:established,to_server;
    http.uri;
    content:"/rp?"; fast_pattern;
    content:"v=";
    content:"a=";
    content:"u=";
    content:"d=";
    pcre:"/^\/(?:[^\x2f]+\/)?rp\?[a-z]=/";
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    reference:md5,fc962cb08f62e3d6368500a8e747cf73;
    classtype:command-and-control;
    sid:2020645; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2015_03_09, deployment Perimeter, malware_family Win32_Trapwot, signature_severity Major, tag c2, updated_at 2020_09_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)