ET MALWARE Win32/Zacom.A CnC Beacon 1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Zacom.A CnC Beacon 1";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".py"; fast_pattern; endswith;
    http.user_agent;
    content:"Windows NT 5.0|3b|";
    http.request_body;
    pcre:"/^\d{4}/";
    http.header_names;
    content:!"Content-Type|0d 0a|";
    content:!"Referer|0d 0a|";
    reference:md5,25631f5ccec8f155a8760b8568ca22c5;
    classtype:command-and-control;
    sid:2021213; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2015_06_09, deployment Perimeter, malware_family Win32_Zacom_A, signature_severity Major, tag c2, updated_at 2020_10_01, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)