Suspicious New Root or CA or AuthRoot Certificate to Store (via registry_set)

title: Suspicious New Root or CA or AuthRoot Certificate to Store (via registry_set)
id: 2d70b54e-a8dd-5f94-bfb0-34a187dfc426
status: stable
description: This rule detects the addition of new root, CA or AuthRoot certificates to the Windows registry
references:
    - https://attack.mitre.org/techniques/T1490/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1553.004/T1553.004.md#atomic-test-6---add-root-certificate-to-currentuser-certificate-store
    - https://posts.specterops.io/code-signing-certificate-cloning-attacks-and-defenses-6f98657fc6ec
author: Huntrule Team
date: 2026-06-09
tags:
    - attack.impact
    - attack.t1490
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|contains:
            - '\SOFTWARE\Microsoft\SystemCertificates\Root\Certificates\'
            - '\SOFTWARE\Policies\Microsoft\SystemCertificates\Root\Certificates\'
            - '\SOFTWARE\Microsoft\EnterpriseCertificates\Root\Certificates\'
            - '\SOFTWARE\Microsoft\SystemCertificates\CA\Certificates\'
            - '\SOFTWARE\Policies\Microsoft\SystemCertificates\CA\Certificates\'
            - '\SOFTWARE\Microsoft\EnterpriseCertificates\CA\Certificates\'
            - '\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\'
            - '\SOFTWARE\Policies\Microsoft\SystemCertificates\AuthRoot\Certificates\'
            - '\SOFTWARE\Microsoft\EnterpriseCertificates\AuthRoot\Certificates\'
        TargetObject|endswith: '\Blob'
        Details: 'Binary Data'
    condition: selection
falsepositives:
    - Unknown
level: medium