ET MALWARE Havoc Demon CnC Request

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Havoc Demon CnC Request";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"|DE AD BE EF|"; offset:4; fast_pattern;
    content:"|00 00 00 63|"; distance:4; within:4;
    byte_jump:4,0, post_offset -1;
    isdataat:!2,relative;
    reference:url,zscaler.com/blogs/security-research/havoc-across-cyberspace;
    reference:url,fortinet.com/blog/threat-research/malware-disguised-as-document-ukraine-energoatom-delivers-havoc-demon-backdoor;
    classtype:command-and-control;
    sid:2056539; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_10_07, deployment Perimeter, confidence High, signature_severity Major, tag c2, updated_at 2024_10_08, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)