Wdigest Enable UseLogonCredential — Sigma Rule

Rule metadata and linked tags

Author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research). Source status: test; severity: high. Source dates: 2019-09-12 / 2023-08-17.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: a28b5e5e10cb58fd4884b67d98c94a0d8577e1e617c62b2dc5386e6c2d68ed1c

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 Enable UseLogonCredential
id: d6a9b252-c666-4de6-8806-5561bbbd3bdc
status: test
description: Detects potential malicious modification of the property value of UseLogonCredential from HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\WDigest to enable clear-text credentials
references:
    - https://threathunterplaybook.com/hunts/windows/190510-RegModWDigestDowngrade/notebook.html
    - https://support.microsoft.com/en-us/topic/microsoft-security-advisory-update-to-improve-credentials-protection-and-management-may-13-2014-93434251-04ac-b7f3-52aa-9f951c14b649
    - https://github.com/redcanaryco/atomic-red-team/blob/73fcfa1d4863f6a4e17f90e54401de6e30a312bb/atomics/T1112/T1112.md#atomic-test-3---modify-registry-to-store-logon-credentials
author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
date: 2019-09-12
modified: 2023-08-17
tags:
    - attack.persistence
    - attack.defense-impairment
    - attack.t1112
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|endswith: 'WDigest\UseLogonCredential'
        Details: DWORD (0x00000001)
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://threathunterplaybook.com/hunts/windows/190510-RegModWDigestDowngrade/notebook.html
• https://support.microsoft.com/en-us/topic/microsoft-security-advisory-update-to-improve-credentials-protection-and-management-may-13-2014-93434251-04ac-b7f3-52aa-9f951c14b649
• https://github.com/redcanaryco/atomic-red-team/blob/73fcfa1d4863f6a4e17f90e54401de6e30a312bb/atomics/T1112/T1112.md#atomic-test-3---modify-registry-to-store-logon-credentials