ET MALWARE JS ZimReaper C2 Exfiltration

alert http [$HOME_NET,$SMTP_SERVERS] any -> any any (
    msg:"ET MALWARE JS ZimReaper C2 Exfiltration";
    flow:established,to_server;
    http.request_line;
    content:"POST /v/d HTTP/"; fast_pattern;
    http.host;
    content:"js|2d|"; startswith;
    content:"|2e|i|2e|";
    http.content_type;
    content:"application/octet-stream";
    http.header;
    content:"x-filename|3a 20|"; nocase;
    pcre:"/^(?:(?:zimbra_batch_analytics|telemetry_[^\x2e]+)\x2ejson|telemetryData_[^\x2e]+\x2etgz)/R";
    reference:url,www.proofpoint.com/us/blog/threat-insight/ta488-targets-zimbra-mailservers-half-click-exploits;
    classtype:trojan-activity;
    sid:2071244; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2026_07_21, deployment Perimeter, malware_family ZimReaper, confidence High, signature_severity Major, tag c2, updated_at 2026_07_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
    target:src_ip;
)