ET USER_AGENTS Suspicious User-Agent (update)

Query · suricata

flow:to_server,established;
threshold:type limit, count 3, seconds 300, track by_src;
http.user_agent;
content:"update"; depth:6; endswith;
Raw source ET USER_AGENTS Suspicious User-Agent (update) · 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 USER_AGENTS Suspicious User-Agent (update)";
    flow:to_server,established;
    threshold:type limit, count 3, seconds 300, track by_src;
    http.user_agent;
    content:"update"; depth:6; endswith;
    classtype:pup-activity;
    sid:2003583; rev:14;
    metadata:affected_product Any, attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, confidence High, signature_severity Minor, tag User_Agent, updated_at 2020_10_19;
)

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.