huntrule

Windows Process Creation: Registry Tampering of DisableRestrictedAdmin in Lsa Key

Alerts when a process command line references LSA DisableRestrictedAdmin to change RestrictedAdmin behavior via the registry.

FreeReviewedSigma · High · v1
Product
windows
Category
process_creation
Author
frack113 (SigmaHQ), DRL 1.1
Published
2023-01-13
Updated
2026-07-30
AnalysisDetection

ATT&CK techniques

Persistence → Defense Evasion

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule flags process creation events where the command line contains both the LSA key path and the DisableRestrictedAdmin registry value, indicating an attempt to change RestrictedAdmin mode settings. RestrictedAdmin mode is intended to limit reuse of credentials over Remote Desktop connections, so modifying this value can undermine that protection. It relies on Windows process creation telemetry with the command line content matching the specified key and value strings.

Reporting behind it

Related detections9 linkedT1112 — drag to rearrange
Malicious Enabling of Restricted Admin Mode via Registry by UAT-8837
Suspicious Enabling of Remote Desktop via fDenyTSConnections Registry by DeadLock Ransomware
Malicious Service DLL Hijack for Persistence via Lotus Blossom
Suspicious Loopback Proxy Server Configured via Registry (via registry_set)
Malicious WDigest Credential Caching Enabled via Registry (via registry_set)
Suspicious Remote Desktop Enabled via fDenyTSConnections Registry by Sandworm
Malicious Gh0stBins RAT Registry Marker HHClient
Suspicious PebbleDash C2 Configuration Stored Under WMI Security Key (via registry_set)
Suspicious WDigest UseLogonCredential Enablement for Plaintext Credential Theft (via registry_set)
Windows Process Creation: Registry Tampering of DisableRestrictedAdmin in Lsa Key
Pivot detection · T1112 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.