ET MALWARE IceCube JS Backdoor C2 Collect Info

Query · suricata

flow:established,to_server;
http.uri; bsize:12;
content:"/api/collect";
http.header_names;
content:"x-c2-token|0d 0a|"; fast_pattern; nocase;
http.method;
content:"POST";
target:src_ip;
Raw source ET MALWARE IceCube JS Backdoor C2 Collect Info · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE IceCube JS Backdoor C2 Collect Info";
    flow:established,to_server;
    http.uri; bsize:12;
    content:"/api/collect";
    http.header_names;
    content:"x-c2-token|0d 0a|"; fast_pattern; nocase;
    http.method;
    content:"POST";
    reference:url,www.proofpoint.com/us/blog/threat-insight/one-email-closer-edge-unkmasstraction-physics-exploitation;
    classtype:trojan-activity;
    sid:2071123; 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;
)

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