ET INFO Observed DNS Query to *.ngrok Domain (ngrok-free .app)

Query · suricata

dns.query; dotprefix;
content:".ngrok-free.app"; nocase; endswith;
target:src_ip;
Raw source ET INFO Observed DNS Query to *.ngrok Domain (ngrok-free .app) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert dns $HOME_NET any -> any any (
    msg:"ET INFO Observed DNS Query to *.ngrok Domain (ngrok-free .app)";
    dns.query; dotprefix;
    content:".ngrok-free.app"; nocase; endswith;
    reference:url,ngrok.com/blog-post/new-ngrok-domains;
    classtype:misc-activity;
    sid:2049052; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_11_02, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_02, reviewed_at 2024_05_03;
    target:src_ip;
)

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