ET HUNTING Suspicious Use of rzd URL Shortener Service

Query · suricata

flow:established,to_server;
http.method;
content:"HEAD";
http.host;
content:"rzd.ac"; bsize:6; fast_pattern;
Raw source ET HUNTING Suspicious Use of rzd URL Shortener Service · 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 Suspicious Use of rzd URL Shortener Service";
    flow:established,to_server;
    http.method;
    content:"HEAD";
    http.host;
    content:"rzd.ac"; bsize:6; fast_pattern;
    classtype:policy-violation;
    sid:2031647; rev:1;
    metadata:created_at 2021_02_22, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_02_22;
)

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