ET INFO .exe download with no referer (noalert)

Query · suricata

flow:established,to_server;
flowbits:set,exe.no.referer;
flowbits:noalert;
http.uri;
content:".exe"; fast_pattern;
http.header_names;
content:!"Referer|0d 0a|";

Rule dependencies

Feeds into

  • 1 rule read exe.no.referer · view all
Raw source ET INFO .exe download with no referer (noalert) · Suricata
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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 INFO .exe download with no referer (noalert)";
    flow:established,to_server;
    flowbits:set,exe.no.referer;
    flowbits:noalert;
    http.uri;
    content:".exe"; fast_pattern;
    http.header_names;
    content:!"Referer|0d 0a|";
    classtype:bad-unknown;
    sid:2020573; rev:5;
    metadata:created_at 2015_02_27, performance_impact Moderate, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_22;
)

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