Suspicious TeamViewer Remote Access DNS Resolution (via dns_query)

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1219Remote Access Tools
Exfiltration
Impact

What it detects

This rule detects DNS queries to TeamViewer infrastructure subdomains such as master, ping, router, and server nodes under teamviewer.com. Abuse of TeamViewer remote access enabled the Oldsmar water treatment facility intrusion where an operator workstation was manipulated remotely. TeamViewer is dual-use, so this detection is most valuable in ICS and OT segments where remote-access tooling should be absent or tightly controlled.

Reporting behind it

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Suspicious TeamViewer Remote Access DNS Resolution (via dns_query)

Pivot detection · T1219 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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