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Tailscale: Device Tailscale SSH newly enabled

Description

Identifies when Tailscale SSH is enabled on a device that previously did not have it. SSH provides authenticated shell access over the tailnet using Tailscale identity, broadening attack surface if unexpected. Verify and confirm the SSH ACL covers it.

Rule type: Scheduled
Version: 1.0.0
Declared status: Available
Query frequency: 1h
Query period: 2d
Trigger: gt 0

Declared MITRE coverage

Declared sources

Metadata from the source file. No dependencies inferred from KQL.

Connectors

TailscaleCCF

Data types

Tailscale_Devices_CL

KQL query

Original query, unchanged.

let recent =
    Tailscale_Devices_CL
    | where TimeGenerated > ago(1h)
    | summarize arg_max(TimeGenerated, *) by DeviceId
    | where SshEnabled == true
    | project DeviceId, DeviceName, Hostname, User, Os, ClientVersion, LastSeen;
let prior =
    Tailscale_Devices_CL
    | where TimeGenerated between (ago(2d) .. ago(1h))
    | summarize arg_max(TimeGenerated, *) by DeviceId
    | where SshEnabled == true
    | distinct DeviceId;
recent
| join kind=leftanti prior on DeviceId
| project TimeGenerated = now(), DeviceName, Hostname, User, Os, ClientVersion, LastSeen

Declared entities

HostAccount

Source provenance

GitHub

Displayed values come from files in Azure/Azure-Sentinel. They describe the published template, not your workspace configuration.

File: Solutions/Tailscale (CCF)/Analytic Rules/TailscaleDeviceSshNewlyEnabled.yaml ↗
Commit: 9800e51 ↗
Source identifier: f0a1b2c3-4567-8901-23de-f12345670041

Additional source files 2

Solutions/Tailscale (CCF)/Analytic Rules/TailscaleDeviceSshNewlyEnabled.yamlsource ↗Solutions/Tailscale (CCF)/Data/Solution_Tailscale.jsonsolution-membership ↗

GSTEP / CATALOG TRACKING

Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC

GSTEP sync dates, separate from the source content’s publication dates.