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Allow RDP Remote Assistance Feature

Sigma Rules

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Summary
This rule monitors for the enabling of the Remote Desktop Protocol (RDP) Remote Assistance feature on Windows machines. Specifically, it detects when the registry value `fAllowToGetHelp` located at `HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Terminal Server` is set to `1` (DWORD: 0x00000001). This change allows specific users to remotely connect for assistance purposes. While enabling RDP Remote Assistance can be a legitimate administrative action, it is critical to monitor such changes as they represent an avenue for potential security vulnerabilities. Attackers can exploit remote access features to gain unauthorized access to systems. The detection rule considers legitimate uses of this feature as false positives, alerting when the setting changes are made, thus allowing incident responders to investigate further any malicious intent or unauthorized modifications.
Categories
  • Windows
  • Endpoint
  • Linux
Data Sources
  • Windows Registry
  • Logon Session
ATT&CK Techniques
  • T1112
Created: 2022-08-19