ET SCAN DuckDuckGo Webcrawler User-Agent (DuckDuckBot)

Query · suricata

flow:established,to_server;
http.user_agent;
content:"DuckDuckBot"; nocase;
Raw source ET SCAN DuckDuckGo Webcrawler User-Agent (DuckDuckBot) · 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 $HTTP_PORTS (
    msg:"ET SCAN DuckDuckGo Webcrawler User-Agent (DuckDuckBot)";
    flow:established,to_server;
    http.user_agent;
    content:"DuckDuckBot"; nocase;
    classtype:not-suspicious;
    sid:2032980; rev:2;
    metadata:attack_target Web_Server, created_at 2021_05_18, deployment Perimeter, confidence High, signature_severity Informational, tag WebCrawler, updated_at 2022_05_03, mitre_tactic_id TA0043, mitre_tactic_name Reconnaissance, mitre_technique_id T1593, mitre_technique_name Search_Open_Websites;
)

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