ET POLICY Possible Web Crawl - libwww-perl User Agent

Query · suricata

flow:established,to_server;
threshold:type both, track by_src, count 10, seconds 60;
http.user_agent;
content:"libwww-perl/"; fast_pattern;
Raw source ET POLICY Possible Web Crawl - libwww-perl User Agent · 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 -> $HOME_NET any (
    msg:"ET POLICY Possible Web Crawl - libwww-perl User Agent";
    flow:established,to_server;
    threshold:type both, track by_src, count 10, seconds 60;
    http.user_agent;
    content:"libwww-perl/"; fast_pattern;
    reference:url,www.linpro.no/lwp/;
    classtype:attempted-recon;
    sid:2002935; rev:11;
    metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_21;
)

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