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Wdigest CredGuard Registry Modification — Sigma Rule

Sigma rule 1a2d6c47-75b0-45bd-b133-2c0be75349fd. Wdigest CredGuard Registry Modification — Sigma Rule. 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.

Rule metadata and linked tags

testhighregistry_eventwindowsattack.persistenceattack.defense-impairmentattack.t1112

Author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research). Source status: test; severity: high. Source dates: 2019-08-25 / 2021-11-27.

{
  "category": "registry_event",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: aaba5ef9d9477f92eacf8d75dc6c96f0f5e49e5dd229f1ef4bf80ca31396fc4a

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

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

Original YAML and metadata in JSON

False positives

  • Unknown

Source references

Connected ecosystem references

Exact source-tagged techniques

Telemetry review

Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.

Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.