ET INFO Suspected Pentesting Related Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/T1";
pcre:"/^[0-9]{3}(?:(\.|\x20|\/)?)/R";
http.host;
content:"atomicredteam.io"; fast_pattern; endswith;
target:src_ip;
Raw source ET INFO Suspected Pentesting Related Activity · 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 Suspected Pentesting Related Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/T1";
    pcre:"/^[0-9]{3}(?:(\.|\x20|\/)?)/R";
    http.host;
    content:"atomicredteam.io"; fast_pattern; endswith;
    classtype:misc-activity;
    sid:2052266; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_04_25, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_25;
    target:src_ip;
)

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