ET MALWARE Single char EXE direct download likely trojan (multiple families)

Query · suricata

flow:established,to_server;
http.uri;
content:".exe"; nocase; fast_pattern;
pcre:"/\/[a-z0-9A-Z]\.exe$/i";
Raw source ET MALWARE Single char EXE direct download likely trojan (multiple families) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Single char EXE direct download likely trojan (multiple families)";
    flow:established,to_server;
    http.uri;
    content:".exe"; nocase; fast_pattern;
    pcre:"/\/[a-z0-9A-Z]\.exe$/i";
    classtype:trojan-activity;
    sid:2018581; rev:4;
    metadata:created_at 2014_06_18, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_17;
)

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