ET SCAN Nessus User Agent

Query · suricata

flow:established,to_server;
threshold:type limit, track by_src,count 1, seconds 60;
http.user_agent;
content:"Nessus"; nocase; depth:40;
Raw source ET SCAN Nessus User Agent · Suricata
Esc
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 -> $HOME_NET any (
    msg:"ET SCAN Nessus User Agent";
    flow:established,to_server;
    threshold:type limit, track by_src,count 1, seconds 60;
    http.user_agent;
    content:"Nessus"; nocase; depth:40;
    reference:url,www.nessus.org;
    classtype:attempted-recon;
    sid:2002664; rev:11;
    metadata:created_at 2010_07_30, confidence High, signature_severity Informational, updated_at 2020_04_22;
)

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