ET DOS Bittorrent User-Agent inbound - possible DDOS

Query · suricata

flow:established,to_server;
threshold:type both, count 1, seconds 60, track by_src;
http.user_agent;
content:"Bittorrent"; depth:10;
Raw source ET DOS Bittorrent User-Agent inbound - possible DDOS · 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 $EXTERNAL_NET any -> $HTTP_SERVERS any (
    msg:"ET DOS Bittorrent User-Agent inbound - possible DDOS";
    flow:established,to_server;
    threshold:type both, count 1, seconds 60, track by_src;
    http.user_agent;
    content:"Bittorrent"; depth:10;
    reference:url,torrentfreak.com/zombie-pirate-bay-tracker-fuels-chinese-ddos-attacks-150124/;
    classtype:attempted-dos;
    sid:2020702; rev:4;
    metadata:created_at 2015_03_18, confidence High, signature_severity Major, updated_at 2020_10_14;
)

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