ET POLICY File Downloaded from Discord

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.host;
content:".discordapp.com"; endswith;
http.uri;
content:"/attachments/"; startswith; fast_pattern;
pcre:"/^[0-9]{18}\/[0-9]{18}\/[a-zA-Z0-9]{5,7}$/R";
Raw source ET POLICY File Downloaded from Discord · 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 -> $EXTERNAL_NET any (
    msg:"ET POLICY File Downloaded from Discord";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.host;
    content:".discordapp.com"; endswith;
    http.uri;
    content:"/attachments/"; startswith; fast_pattern;
    pcre:"/^[0-9]{18}\/[0-9]{18}\/[a-zA-Z0-9]{5,7}$/R";
    reference:md5,1ef671ebe0e5efd44cf05c630fbe9cb5;
    classtype:policy-violation;
    sid:2031083; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2020_10_22, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_01_25;
)

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