MT.1089: Devices with critical credentials should be protected by Credential Guard.

ID	MT.1089
Severity	Medium
Suite	Mito
Product	Defender
Feature	Exposure Management
Security area	Devices and endpoints
Resource type	Device
User impact of fixing	Low
Effort to fix	Medium
MITRE ATT&CK	T1003.001
Reads from	Microsoft Graph

What this checks and how to fix it

Devices shown in the output are devices where Credential Guard is not enabled or misconfigured, but contains credentials of critical accounts. When critical credentials are stored on devices without Credential Guard enabled, it is easy for adversaries to steal those credentials when the device is compromised. This is because, without Credential Guard enabled, Kerberos, NTLM, and Credential Manager secrets are stored in the Local Security Authority (LSA) process called lsass.exe, which can be dumped with various tools like MimiKatz. With Credential Guard enabled, these secrets are protected and isolated using Virtualization-based security (VBS).

How to fix

Investigate the related devices and the steps that need to be taken in order to enable Credential Guard. This varies depending on operating system, hardware, and device. More information on how Credential Guard works and how it can be configured can be found in this documentation page.

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Mito check. Author: RobbeVandenDaele; contributors: SamErde. Open-source licences.