ET USER_AGENTS Observed Reconnaissance Related UA

Query · suricata

flow:established,to_server;
http.user_agent;
content:"Mozilla/5.0|20 28|Windows NT 6.1|3b 20|WOW64|3b 20|rv|3a|68.0|29 09 09 09 20 20 20 20|Gecko/20100101|20|Firefox/68.0"; fast_pattern;
Raw source ET USER_AGENTS Observed Reconnaissance Related UA · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET USER_AGENTS Observed Reconnaissance Related UA";
    flow:established,to_server;
    http.user_agent;
    content:"Mozilla/5.0|20 28|Windows NT 6.1|3b 20|WOW64|3b 20|rv|3a|68.0|29 09 09 09 20 20 20 20|Gecko/20100101|20|Firefox/68.0"; fast_pattern;
    reference:url,www.cisa.gov/news-events/cybersecurity-advisories/aa23-144a;
    classtype:misc-activity;
    sid:2047994; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_09_11, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_11, reviewed_at 2023_09_11;
)

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