Wdigest CredGuard Registry Modification

Description

Detects potential malicious modification of the property value of IsCredGuardEnabled from HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\WDigest to disable Cred Guard on a system. This is usually used with UseLogonCredential to manipulate the caching credentials.

Query · sigma

selection:
  TargetObject|endswith: \IsCredGuardEnabled
condition: selection

Known false positives

  • Unknown
Raw source Wdigest CredGuard Registry Modification · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Wdigest CredGuard Registry Modification
id: 1a2d6c47-75b0-45bd-b133-2c0be75349fd
status: test
description: |
  Detects potential malicious modification of the property value of IsCredGuardEnabled from
  HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\WDigest to disable Cred Guard on a system.
  This is usually used with UseLogonCredential to manipulate the caching credentials.
references:
    - https://teamhydra.blog/2020/08/25/bypassing-credential-guard/
author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
date: 2019-08-25
modified: 2021-11-27
tags:
    - attack.persistence
    - attack.defense-impairment
    - attack.t1112
logsource:
    category: registry_event
    product: windows
detection:
    selection:
        TargetObject|endswith: '\IsCredGuardEnabled'
    condition: selection
falsepositives:
    - Unknown
level: high

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