ET HUNTING curl UA Querying External IP (geoplugin .net)

Query · suricata

flow:established,to_server;
urilen:10;
http.method;
content:"GET";
http.uri;
content:"/php.gp?ip"; fast_pattern;
http.user_agent;
content:"curl/"; startswith; nocase;
http.host;
content:"geoplugin.net"; endswith;
target:src_ip;
Raw source ET HUNTING curl UA Querying External IP (geoplugin .net) · 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 curl UA Querying External IP (geoplugin .net)";
    flow:established,to_server;
    urilen:10;
    http.method;
    content:"GET";
    http.uri;
    content:"/php.gp?ip"; fast_pattern;
    http.user_agent;
    content:"curl/"; startswith; nocase;
    http.host;
    content:"geoplugin.net"; endswith;
    reference:md5,d70405777ea19bb1e778ddffea8f8577;
    classtype:external-ip-check;
    sid:2049166; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_11_13, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_13;
    target:src_ip;
)

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