ET USER_AGENTS Observed Suspicious UA (Hello, World)

Query · suricata

flow:established,to_server;
http.user_agent;
content:"Hello, World"; depth:12; endswith;
Raw source ET USER_AGENTS Observed Suspicious UA (Hello, World) · 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 Observed Suspicious UA (Hello, World)";
    flow:established,to_server;
    http.user_agent;
    content:"Hello, World"; depth:12; endswith;
    classtype:bad-unknown;
    sid:2027503; rev:3;
    metadata:affected_product Any, attack_target Client_Endpoint, created_at 2019_06_21, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2020_09_17;
)

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.