ET HUNTING Suspicious GET Request for .ppc File

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".ppc"; endswith; fast_pattern;
http.host;
pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/";
http.header_names;
content:!"Referer";
Raw source ET HUNTING Suspicious GET Request for .ppc File · 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 -> $EXTERNAL_NET any (
    msg:"ET HUNTING Suspicious GET Request for .ppc File";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".ppc"; endswith; fast_pattern;
    http.host;
    pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/";
    http.header_names;
    content:!"Referer";
    reference:md5,59a83208dd897b3714dc80e15253120e;
    classtype:bad-unknown;
    sid:2038657; rev:1;
    metadata:created_at 2022_08_29, deployment Perimeter, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_06, reviewed_at 2024_12_02;
)

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