ET HUNTING SUSPICIOUS DOC Download from commonly abused file share site

Query · suricata

flow:to_server,established;
http.uri;
content:".doc";
http.host;
content:"a.pomf.cat"; fast_pattern; bsize:10;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET HUNTING SUSPICIOUS DOC Download from commonly abused file share site · 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 HUNTING SUSPICIOUS DOC Download from commonly abused file share site";
    flow:to_server,established;
    http.uri;
    content:".doc";
    http.host;
    content:"a.pomf.cat"; fast_pattern; bsize:10;
    http.header_names;
    content:!"Referer|0d 0a|";
    classtype:trojan-activity;
    sid:2024836; rev:3;
    metadata:created_at 2017_10_11, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_13;
)

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