↳ GitHub sourceAnalytics ruleMedium
Tailscale Premium: Large outbound transfer over tailnet
Description
Identifies when a single src-dst pair transfers more than 100 MB over the tailnet within a 1-hour window. Large bursts can indicate data staging, exfiltration, or a misconfigured backup. Requires Tailscale Premium or Enterprise.
- Rule type
- Scheduled
- Version
- 1.0.0
- Declared status
- Available
- Query frequency
- 1h
- Query period
- 1h
- Trigger
- gt 0
Declared MITRE coverage
Declared sources
Metadata from the source file. No dependencies inferred from KQL.
Connectors
Data types
KQL query
Original query, unchanged.
let bytesThreshold = 100 * 1024 * 1024;
Tailscale_Network_CL
| where TimeGenerated > ago(1h)
| where HasVirtualTraffic
| mv-expand t = VirtualTraffic
| extend Src = tostring(t.src), Dst = tostring(t.dst), Proto = toint(t.proto), Bytes = tolong(t.txBytes) + tolong(t.rxBytes), Pkts = tolong(t.txPkts) + tolong(t.rxPkts)
| summarize TotalBytes = sum(Bytes), TotalPackets = sum(Pkts) by NodeId, SrcNodeName, SrcUser, DstNodeName, DstUser, Src, Dst, Proto
| where TotalBytes > bytesThreshold
| extend TotalMB = round(TotalBytes / 1024.0 / 1024.0, 2)
| order by TotalBytes desc
Declared entities
Related content
Links established from declared identifiers and solution manifests.
Source provenance
GitHubDisplayed values come from files in Azure/Azure-Sentinel. They describe the published template, not your workspace configuration.
- Commit
9800e51↗- Source identifier
d2e3f4a5-2b3c-4d5e-6f7a-8b9c0d1e2f3a
GSTEP / CATALOG TRACKING
Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC