ET USER_AGENTS Observed Malicious User-Agent (Brute Force Attacks)

Query · suricata

flow:established,to_server;
http.user_agent;
content:"Mozilla/5.0|20|(Windows|20|NT|20|10.0|3b 20|Win64|3b 20|x64)|20|AppleWebKit/537.36|20|(KHTML,|20|like|20|Gecko)|20|Chrome/70."; bsize:91;
Raw source ET USER_AGENTS Observed Malicious User-Agent (Brute Force Attacks) · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET USER_AGENTS Observed Malicious User-Agent (Brute Force Attacks)";
    flow:established,to_server;
    http.user_agent;
    content:"Mozilla/5.0|20|(Windows|20|NT|20|10.0|3b 20|Win64|3b 20|x64)|20|AppleWebKit/537.36|20|(KHTML,|20|like|20|Gecko)|20|Chrome/70."; bsize:91;
    reference:url,media.defense.gov/2021/Jul/01/2002753896/-1/-1/1/CSA_GRU_GLOBAL_BRUTE_FORCE_CAMPAIGN_UOO158036-21.PDF;
    classtype:bad-unknown;
    sid:2033314; rev:1;
    metadata:created_at 2021_07_12, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_12;
)

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