ET USER_AGENTS Suspicious User-Agent (Hello World)

Query · suricata

flow:established,to_server;
http.user_agent;
content:"Hello World"; bsize:12; nocase; fast_pattern;
Raw source ET USER_AGENTS Suspicious User-Agent (Hello World) · 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 USER_AGENTS Suspicious User-Agent (Hello World)";
    flow:established,to_server;
    http.user_agent;
    content:"Hello World"; bsize:12; nocase; fast_pattern;
    classtype:trojan-activity;
    sid:2038507; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_08_12, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_12, reviewed_at 2024_12_02;
)

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