ET HUNTING Office Doc Retrieving Shortened URL (bit .do)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.user_agent;
content:"|3b 20|ms-office|3b 20|";
http.host;
content:"bit.do"; bsize:6; fast_pattern;
Raw source ET HUNTING Office Doc Retrieving Shortened URL (bit .do) · 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 HUNTING Office Doc Retrieving Shortened URL (bit .do)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.user_agent;
    content:"|3b 20|ms-office|3b 20|";
    http.host;
    content:"bit.do"; bsize:6; fast_pattern;
    reference:md5,04a303e67b4a2f9f7bb532779aef2c72;
    classtype:bad-unknown;
    sid:2033133; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_06_10, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_10;
)

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