Tailscale Premium: Beaconing candidates (regular periodic flows)

Identifies flows that recur at a highly regular interval, which is the signature of C2 beaconing or scheduled exfiltration jobs. Looser threshold than the analytic rule - investigation aid.

Detection logic

Detection requirements

Platform: ESXi Linux macOS Network Devices Windows
The rule states no platform. This is derived from the 3 ATT&CK techniques it maps to.
Log source product: tailscalepremiumccf
Log source service: tailscale_network_cl

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Detection rules

Tailscale Premium: Beaconing candidates (regular periodic flows)

Detection logic

Detection requirements

MITRE ATT&CK mappings

From the source

Licence

Authorship

Detection rules