ET USER_AGENTS Suspicious User-Agent (aaaa)

Query · suricata

flow:established,to_server;
http.user_agent;
content:"aaaa"; bsize:4;
Raw source ET USER_AGENTS Suspicious User-Agent (aaaa) · 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 (aaaa)";
    flow:established,to_server;
    http.user_agent;
    content:"aaaa"; bsize:4;
    reference:md5,61e213e717cc8e156cec79a7c1cd0c64;
    classtype:bad-unknown;
    sid:2031613; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_02_11, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_02_11;
)

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