ET HUNTING SUSPICIOUS *.pdf.exe in HTTP HEADER

Query · suricata

flow:from_server,established;
http.header;
content:"Content-Disposition|3a 20|attachment|3b 20|filename="; nocase;
content:".pdf.exe"; nocase; distance:0; fast_pattern;
Raw source ET HUNTING SUSPICIOUS *.pdf.exe in HTTP HEADER · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING SUSPICIOUS *.pdf.exe in HTTP HEADER";
    flow:from_server,established;
    http.header;
    content:"Content-Disposition|3a 20|attachment|3b 20|filename="; nocase;
    content:".pdf.exe"; nocase; distance:0; fast_pattern;
    classtype:bad-unknown;
    sid:2013478; rev:9;
    metadata:created_at 2011_08_26, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_22;
)

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