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Remote Management and Monitoring tool - TigerVNC - Network Connection

kql MEDIUM Azure-Sentinel
T1219
DeviceNetworkEvents
huntingmicrosoftofficial
This rule was pulled from an open-source repository and enriched with AI. Validate in a test environment before deploying to production.
View original rule at Azure-Sentinel →
Retrieved: 2026-06-01T23:00:00Z · Confidence: medium

Hunt Hypothesis

TigerVNC is being used by adversaries to establish remote management and monitoring capabilities, enabling persistent access and potential command and control communication. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate potential compromise of endpoint systems through abused remote management tools.

KQL Query

let Time_start = now(-5d);
let Time_end = now();
//
DeviceNetworkEvents
| where Timestamp between (Time_start..Time_end)
| where InitiatingProcessVersionInfoCompanyName has 'TigerVNC'
    and InitiatingProcessVersionInfoProductName has 'TigerVNC'
| summarize FirstSeen=min(Timestamp), LastSeen=max(Timestamp), 
    Report=make_set(ReportId), Count=count() by DeviceId, DeviceName,
    RemoteUrl

Analytic Rule Definition

id: dc1950c0-efeb-4695-aa95-74198df5dab8
name: Remote Management and Monitoring tool - TigerVNC - Network Connection
description: |
    Remote Monitoring and Management (RMM) programs are IT to manage remote endpoints. Attackers have begun to abuse these programs to persist or provide C2 channels.
    https://github.com/jischell-msft/RemoteManagementMonitoringTools
requiredDataConnectors:
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - DeviceNetworkEvents
tactics: CommandAndControl
relevantTechniques: T1219
query: |
  let Time_start = now(-5d);
  let Time_end = now();
  //
  DeviceNetworkEvents
  | where Timestamp between (Time_start..Time_end)
  | where InitiatingProcessVersionInfoCompanyName has 'TigerVNC'
      and InitiatingProcessVersionInfoProductName has 'TigerVNC'
  | summarize FirstSeen=min(Timestamp), LastSeen=max(Timestamp), 
      Report=make_set(ReportId), Count=count() by DeviceId, DeviceName,
      RemoteUrl

Required Data Sources

Sentinel TableNotes
DeviceNetworkEventsEnsure this data connector is enabled

MITRE ATT&CK Context

References

False Positive Guidance

Original source: https://github.com/Azure/Azure-Sentinel/blob/main/Hunting Queries/Microsoft 365 Defender/RemoteManagementMonitoring/rmm_TigerVNC_netconn.yaml