ET USER_AGENTS FastHTTP User-Agent Observed Outbound (fasthttp)

Query · suricata

flow:established,to_server;
http.user_agent; bsize:8;
content:"fasthttp"; fast_pattern;
threshold:type limit, count 1, seconds 300, track by_src;
target:src_ip;
Raw source ET USER_AGENTS FastHTTP User-Agent Observed Outbound (fasthttp) · 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 FastHTTP User-Agent Observed Outbound (fasthttp)";
    flow:established,to_server;
    http.user_agent; bsize:8;
    content:"fasthttp"; fast_pattern;
    threshold:type limit, count 1, seconds 300, track by_src;
    reference:url,github.com/valyala/fasthttp;
    classtype:misc-activity;
    sid:2059373; rev:1;
    metadata:attack_target Client_Endpoint, tls_state plaintext, created_at 2025_01_21, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2025_01_21;
    target:src_ip;
)

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