ET MALWARE EtherHiding Exfil M3

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE EtherHiding Exfil M3";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.user_agent;
    content:"WindowsPowerShell";
    http.content_type;
    content:"application/json";
    http.request_body; strip_whitespace;
    content:"|22|method|22 3a|";
    content:"|22|eth_call|22 2c|"; fast_pattern;
    content:"|22|params|22 3a|";
    content:"|22|to|22 3a|";
    pcre:"/0x(?:[a-zA-Z0-9]{40})(?:[\s]\r\n+)?\x22/";
    content:"|22|data|22 3a|";
    threshold:type limit,count 1,seconds 300,track by_src;
    classtype:command-and-control;
    sid:2071682; rev:1;
    metadata:affected_product Windows_Client, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_08_20, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag c2, updated_at 2026_08_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)