ET MALWARE Unknown - Loader - Check .exe Updated

Query · suricata

flow:established,to_server;
urilen:<10;
http.uri;
content:".exe"; fast_pattern;
http.header;
content:"If-Modified-Since|3a 20|";
content:"If-None-Match|3a 20|";
http.user_agent;
content:!"PatchManager|20|";
Raw source ET MALWARE Unknown - Loader - Check .exe Updated · 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 MALWARE Unknown - Loader - Check .exe Updated";
    flow:established,to_server;
    urilen:<10;
    http.uri;
    content:".exe"; fast_pattern;
    http.header;
    content:"If-Modified-Since|3a 20|";
    content:"If-None-Match|3a 20|";
    http.user_agent;
    content:!"PatchManager|20|";
    classtype:trojan-activity;
    sid:2016097; rev:6;
    metadata:created_at 2012_12_28, confidence Medium, signature_severity Major, updated_at 2022_08_22, reviewed_at 2024_03_25;
)

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