ET HUNTING Suspicious Empty Accept-Encoding Header

Query · suricata

flow:established,to_server;
http.header;
content:"Accept-Encoding|3a 20 0d 0a|"; fast_pattern; nocase;
Raw source ET HUNTING Suspicious Empty Accept-Encoding Header · 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 HUNTING Suspicious Empty Accept-Encoding Header";
    flow:established,to_server;
    http.header;
    content:"Accept-Encoding|3a 20 0d 0a|"; fast_pattern; nocase;
    classtype:unknown;
    sid:2043026; rev:2;
    metadata:created_at 2022_12_28, deployment Perimeter, performance_impact Moderate, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_02;
)

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