ET HUNTING Suspicious UA (^IE[\d\s])

Query · suricata

flow:established,to_server;
http.header;
content:!"symantec"; nocase;
content:!"norton"; nocase;
http.user_agent;
content:"IE"; depth:2; nocase; fast_pattern;
pcre:"/^[\d\s]/R";
http.host;
content:!".bing.com";
Raw source ET HUNTING Suspicious UA (^IE[\d\s]) · 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 HUNTING Suspicious UA (^IE[\d\s])";
    flow:established,to_server;
    http.header;
    content:!"symantec"; nocase;
    content:!"norton"; nocase;
    http.user_agent;
    content:"IE"; depth:2; nocase; fast_pattern;
    pcre:"/^[\d\s]/R";
    http.host;
    content:!".bing.com";
    reference:md5,209e6701da137084c2f60c90d64505f2;
    classtype:trojan-activity;
    sid:2018010; rev:6;
    metadata:created_at 2014_01_24, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_18;
)

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