ET MALWARE Peerblight ZinFoq Backdoor CnC Beacon

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"|2f|en|2f|about|3f|source|3d|redhat|26|id|3d|v1|2e|"; fast_pattern;
http.accept_enc; bsize:4;
content:"gzip";
http.request_body;
content:"7b2269707322"; startswith;
target:src_ip;
Raw source ET MALWARE Peerblight ZinFoq Backdoor CnC Beacon · Suricata
Esc
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 Peerblight ZinFoq Backdoor CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"|2f|en|2f|about|3f|source|3d|redhat|26|id|3d|v1|2e|"; fast_pattern;
    http.accept_enc; bsize:4;
    content:"gzip";
    http.request_body;
    content:"7b2269707322"; startswith;
    reference:url,www.huntress.com/blog/peerblight-linux-backdoor-exploits-react2shell;
    classtype:trojan-activity;
    sid:2066250; rev:1;
    metadata:affected_product Linux, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_12_10, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_12_10;
    target:src_ip;
)

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