ET HUNTING Suspicious Invalid HTTP Accept Header of ?

Query · suricata

flow:established,to_server;
http.header;
content:"Accept|3a 20|?";
Raw source ET HUNTING Suspicious Invalid HTTP Accept Header of ? · 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 HUNTING Suspicious Invalid HTTP Accept Header of ?";
    flow:established,to_server;
    http.header;
    content:"Accept|3a 20|?";
    classtype:trojan-activity;
    sid:2013974; rev:4;
    metadata:created_at 2011_12_01, confidence Medium, signature_severity Major, updated_at 2020_04_20;
)

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