ET INFO HTTP Request for ISO File Direct to IP

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.host;
pcre:"/^(?:\d{1,3}\.){3}\d{1,3}(?:\x3a\d+)?$/";
http.request_line;
content:".iso HTTP/1."; fast_pattern;
Raw source ET INFO HTTP Request for ISO File Direct to IP · 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 -> $EXTERNAL_NET any (
    msg:"ET INFO HTTP Request for ISO File Direct to IP";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.host;
    pcre:"/^(?:\d{1,3}\.){3}\d{1,3}(?:\x3a\d+)?$/";
    http.request_line;
    content:".iso HTTP/1."; fast_pattern;
    classtype:misc-activity;
    sid:2030205; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2020_05_22, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_22;
)

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