ET DOS HOIC with booster inbound

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.header.raw;
content:"If-Modified-Since|3a 20 20|";
content:"Keep-Alive|3a 20 20|";
content:"Connection|3a 20 20|";
content:"User-Agent|3a 20 20|";
http.start;
content:"HTTP/1.0|0d 0a|Accept|3a 20|*/*|0d 0a|Accept-Language|3a 20|"; fast_pattern;
threshold:type both, count 1, seconds 60, track by_dst;
Raw source ET DOS HOIC with booster inbound · 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 HOIC with booster inbound";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.header.raw;
    content:"If-Modified-Since|3a 20 20|";
    content:"Keep-Alive|3a 20 20|";
    content:"Connection|3a 20 20|";
    content:"User-Agent|3a 20 20|";
    http.start;
    content:"HTTP/1.0|0d 0a|Accept|3a 20|*/*|0d 0a|Accept-Language|3a 20|"; fast_pattern;
    threshold:type both, count 1, seconds 60, track by_dst;
    reference:md5,23fc64a5cac4406d7143ea26e8c4c7ab;
    reference:url,blog.spiderlabs.com/2012/01/hoic-ddos-analysis-and-detection.html;
    classtype:trojan-activity;
    sid:2018978; rev:5;
    metadata:created_at 2014_08_21, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;
)

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