ET USER_AGENTS Observed Suspicious UA (Client)

Query · suricata

flow:established,to_server;
http.user_agent;
content:"Client"; bsize:6;
http.header;
content:"User-Agent|3a 20|Client|0d 0a|"; fast_pattern;
Raw source ET USER_AGENTS Observed Suspicious UA (Client) · 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 (Client)";
    flow:established,to_server;
    http.user_agent;
    content:"Client"; bsize:6;
    http.header;
    content:"User-Agent|3a 20|Client|0d 0a|"; fast_pattern;
    classtype:bad-unknown;
    sid:2028912; rev:2;
    metadata:affected_product Any, attack_target Client_Endpoint, created_at 2019_10_28, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2019_10_28;
)

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