ET INFO Observed TeamViewer RMM Related Domain (teamviewer .com) in TLS SNI

Query · suricata

flow:established,to_server;
content:!"www";
tls.sni; dotprefix;
content:".teamviewer.com"; endswith; fast_pattern;
threshold:type limit, seconds 180, count 1, track by_src;
Raw source ET INFO Observed TeamViewer RMM Related Domain (teamviewer .com) in TLS SNI · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tls $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET INFO Observed TeamViewer RMM Related Domain (teamviewer .com) in TLS SNI";
    flow:established,to_server;
    content:!"www";
    tls.sni; dotprefix;
    content:".teamviewer.com"; endswith; fast_pattern;
    threshold:type limit, seconds 180, count 1, track by_src;
    reference:url,www.teamviewer.com;
    classtype:misc-activity;
    sid:2060632; rev:1;
    metadata:affected_product Any, attack_target Client_and_Server, created_at 2025_03_05, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Teamviewer, tag RMM, updated_at 2025_03_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1219, mitre_technique_name Remote_Access_Software;
)

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