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Whisper Security - Tor Exit Node Communication

Description

Identifies network traffic communicating with known Tor exit nodes. While Tor usage may be legitimate in some environments, unexpected Tor communication can indicate data exfiltration, C2 tunneling, or policy violations.
Rule type
Scheduled
Version
1.0.0
Declared status
Available
Query frequency
1h
Query period
1d
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.

// MITRE ATT&CK: T1090.003 - Proxy: Multi-hop Proxy
// Tactic: Command and Control
// Detects communication with Tor exit nodes using Whisper threat intelligence
let timeRange = 1d;
let torIndicators = WhisperThreatIntel_CL
    | where TimeGenerated > ago(timeRange)
    | where isTor == true
    | project indicator, threatScore, threatLevel, feedNames, lastSeen;
let CommonSecurityLogSafe = union isfuzzy=true CommonSecurityLog, (datatable(TimeGenerated:datetime, DestinationIP:string, SourceIP:string, DeviceProduct:string, DeviceAction:string, DeviceVendor:string, Activity:string)[]);
CommonSecurityLogSafe
    | where TimeGenerated > ago(timeRange)
    | where isnotempty(DestinationIP)
    | join kind=inner (torIndicators) on $left.DestinationIP == $right.indicator
    | extend SourceIP = SourceIP, DestinationIP = DestinationIP
    | project TimeGenerated, SourceIP, DestinationIP, DeviceProduct, DeviceAction, DeviceVendor, Activity, threatScore, threatLevel, feedNames

Declared entities

IP

Related content

Links established from declared identifiers and solution manifests.

Source provenance

GitHub

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

Source identifier
f5567c93-91de-577a-b35e-c2807715493d
Additional source files 2Solutions/Whisper/Analytic Rules/TorExitNodeCommunication.yamlsource ↗Solutions/Whisper/Data/Solution_Whisper.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.