ET HUNTING URL Observed in PDF Downloaded via Dropbox

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
http.header;
content:"x-dropbox-request-id|3a|";
file.data;
content:"|25 50 44 46|"; depth:4;
content:"/Type /Action /S /URI"; fast_pattern; nocase;
Raw source ET HUNTING URL Observed in PDF Downloaded via Dropbox · 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 URL Observed in PDF Downloaded via Dropbox";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.header;
    content:"x-dropbox-request-id|3a|";
    file.data;
    content:"|25 50 44 46|"; depth:4;
    content:"/Type /Action /S /URI"; fast_pattern; nocase;
    classtype:misc-activity;
    sid:2030047; rev:2;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2020_04_28, deployment SSLDecrypt, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_28;
)

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