ET DOS Possible WordPress Pingback DDoS in Progress (Inbound)

Query · suricata

flow:established,to_server;
threshold:type both, track  by_src, count 5, seconds 90;
http.uri;
content:"/xmlrpc.php"; nocase;
http.request_body;
content:"pingback.ping"; nocase; fast_pattern;
Raw source ET DOS Possible WordPress Pingback DDoS in Progress (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 Possible WordPress Pingback DDoS in Progress (Inbound)";
    flow:established,to_server;
    threshold:type both, track  by_src, count 5, seconds 90;
    http.uri;
    content:"/xmlrpc.php"; nocase;
    http.request_body;
    content:"pingback.ping"; nocase; fast_pattern;
    classtype:attempted-dos;
    sid:2018277; rev:4;
    metadata:affected_product Wordpress, affected_product Wordpress_Plugins, attack_target Web_Server, created_at 2014_03_14, deployment Datacenter, confidence Medium, signature_severity Major, tag Wordpress, updated_at 2020_05_14;
)

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