ET HUNTING Suspicious Header Name In HTTP Request (U)

Query · suricata

flow:established,to_server;
http.header_names;
content:"|0d 0a|U|0d 0a|";
Raw source ET HUNTING Suspicious Header Name In HTTP Request (U) · 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 Header Name In HTTP Request (U)";
    flow:established,to_server;
    http.header_names;
    content:"|0d 0a|U|0d 0a|";
    reference:md5,b3b735852084909f82121fd6fbbdeb68;
    classtype:misc-activity;
    sid:2053436; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_06_10, deployment Perimeter, deployment SSLDecrypt, confidence Low, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_06_10, reviewed_at 2025_04_21;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.