ET USER_AGENTS Suspicious User-Agent (Mozilla/4.0 (compatible ICS))

Query · suricata

flow:established,to_server;
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|ICS)"; depth:29; endswith;
http.host;
content:!".iobit.com";
content:!".microsoft.com";
content:!".cnn.com";
content:!".wunderground.com";
content:!".weatherbug.com";
content:!"iobit.com.s3.amazonaws.com";
Raw source ET USER_AGENTS Suspicious User-Agent (Mozilla/4.0 (compatible ICS)) · 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 Suspicious User-Agent (Mozilla/4.0 (compatible ICS))";
    flow:established,to_server;
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|ICS)"; depth:29; endswith;
    http.host;
    content:!".iobit.com";
    content:!".microsoft.com";
    content:!".cnn.com";
    content:!".wunderground.com";
    content:!".weatherbug.com";
    content:!"iobit.com.s3.amazonaws.com";
    classtype:pup-activity;
    sid:2008038; rev:15;
    metadata:created_at 2010_07_30, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_17;
)

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