ET MALWARE IceCube JS Backdoor C2 Logging

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE IceCube JS Backdoor C2 Logging";
    flow:established,to_server;
    http.uri;
    content:"/api/log?m="; fast_pattern;
    pcre:"/^(?:a(?:rmed|bout)|bootstrap|p(?:1|2[ab])|trig|(?:sendInfo|collect)_err|init)\x257[cC]/R";
    http.method;
    content:"POST";
    reference:url,www.proofpoint.com/us/blog/threat-insight/one-email-closer-edge-unkmasstraction-physics-exploitation;
    classtype:trojan-activity;
    sid:2071122; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2026_07_07, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag c2, updated_at 2026_07_07, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)