Virtualization Based Security must be enabled with the platform security level configured to Secure Boot or Secure Boot with DMA Protection.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-63595	WN10-CC-000070	SV-78085r3_rule		Low

Description
Virtualization Based Security (VBS) provides the platform for the additional security features, Credential Guard and Virtualization based protection of code integrity. Secure Boot is the minimum security level with DMA protection providing additional memory protection. DMA Protection requires a CPU that supports input/output memory management unit (IOMMU).

STIG	Date
Windows 10 Security Technical Implementation Guide	2017-02-21

Details

Check Text ( C-69337r3_chk )
Confirm Virtualization Based Security is enabled and running on domain-joined systems with Secure Boot or Secure Boot and DMA Protection. For standalone systems, this is NA. For those devices that support virtualization based security (VBS) features, including Credential Guard or protection of code integrity, this must be enabled. If the system meets the hardware and firmware dependencies for enabling VBS but it is not enabled, this is a CAT III finding. Virtualization based security, including Credential Guard, currently cannot be implemented in virtual desktop implementations (VDI) due to specific supporting requirements including a TPM, UEFI with Secure Boot, and the capability to run the Hyper-V feature within the virtual desktop. For VDIs where the virtual desktop instance is deleted or refreshed upon logoff, this is NA. Run "PowerShell" with elevated privileges (run as administrator). Enter the following: "Get-CimInstance -ClassName Win32_DeviceGuard -Namespace root\Microsoft\Windows\DeviceGuard" If "RequiredSecurityProperties" does not include a value of "2" indicating "Secure Boot" (e.g., "{1, 2}"), this is a finding. If "Secure Boot and DMA Protection" is configured, "3" will also be displayed in the results (e.g., "{1, 2, 3}"). If "VirtualizationBasedSecurityStatus" is not a value of "2" indicating "Running", this is a finding. Alternately: Run "System Information". Under "System Summary", verify the following: If "Device Guard Virtualization based security" does not display "Running", this is finding. If "Device Guard Required Security Properties" does not display "Base Virtualization Support, Secure Boot", this is finding. If "Secure Boot and DMA Protection" is configured, "DMA Protection" will also be displayed (e.g., "Base Virtualization Support, Secure Boot, DMA Protection"). The policy settings referenced in the Fix section will configure the following registry values. However due to hardware requirements, the registry values alone do not ensure proper function. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\DeviceGuard\ Value Name: EnableVirtualizationBasedSecurity Value Type: REG_DWORD Value: 1 Value Name: RequirePlatformSecurityFeatures Value Type: REG_DWORD Value: 1 (Secure Boot only) or 3 (Secure Boot and DMA Protection) A Microsoft TechNet article on Credential Guard, including system requirement details, can be found at the following link. https://technet.microsoft.com/en-us/library/mt483740%28v=vs.85%29.aspx

Check Text ( C-69337r3_chk )

Confirm Virtualization Based Security is enabled and running on domain-joined systems with Secure Boot or Secure Boot and DMA Protection.

For standalone systems, this is NA.

For those devices that support virtualization based security (VBS) features, including Credential Guard or protection of code integrity, this must be enabled. If the system meets the hardware and firmware dependencies for enabling VBS but it is not enabled, this is a CAT III finding.

Virtualization based security, including Credential Guard, currently cannot be implemented in virtual desktop implementations (VDI) due to specific supporting requirements including a TPM, UEFI with Secure Boot, and the capability to run the Hyper-V feature within the virtual desktop.

For VDIs where the virtual desktop instance is deleted or refreshed upon logoff, this is NA.

Run "PowerShell" with elevated privileges (run as administrator).
Enter the following:
"Get-CimInstance -ClassName Win32_DeviceGuard -Namespace root\Microsoft\Windows\DeviceGuard"

If "RequiredSecurityProperties" does not include a value of "2" indicating "Secure Boot" (e.g., "{1, 2}"), this is a finding.

If "Secure Boot and DMA Protection" is configured, "3" will also be displayed in the results (e.g., "{1, 2, 3}").

If "VirtualizationBasedSecurityStatus" is not a value of "2" indicating "Running", this is a finding.

Alternately:

Run "System Information".
Under "System Summary", verify the following:

If "Device Guard Virtualization based security" does not display "Running", this is finding.

If "Device Guard Required Security Properties" does not display "Base Virtualization Support, Secure Boot", this is finding.

If "Secure Boot and DMA Protection" is configured, "DMA Protection" will also be displayed (e.g., "Base Virtualization Support, Secure Boot, DMA Protection").

The policy settings referenced in the Fix section will configure the following registry values. However due to hardware requirements, the registry values alone do not ensure proper function.

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\Windows\DeviceGuard\

Value Name: EnableVirtualizationBasedSecurity
Value Type: REG_DWORD
Value: 1

Value Name: RequirePlatformSecurityFeatures
Value Type: REG_DWORD
Value: 1 (Secure Boot only) or 3 (Secure Boot and DMA Protection)

A Microsoft TechNet article on Credential Guard, including system requirement details, can be found at the following link.
https://technet.microsoft.com/en-us/library/mt483740%28v=vs.85%29.aspx

Fix Text (F-74851r1_fix)
For standalone systems, this is NA. Virtualization based security, including Credential Guard, currently cannot be implemented in virtual desktop implementations (VDI) due to specific supporting requirements including a TPM, UEFI with Secure Boot, and the capability to run the Hyper-V feature within the virtual desktop. For VDIs where the virtual desktop instance is deleted or refreshed upon logoff, this is NA. Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Device Guard >> "Turn On Virtualization Based Security" to "Enabled" with "Secure Boot" or "Secure Boot and DMA Protection" selected. A Microsoft TechNet article on Credential Guard, including system requirement details, can be found at the following link. https://technet.microsoft.com/en-us/library/mt483740%28v=vs.85%29.aspx

Fix Text (F-74851r1_fix)

For standalone systems, this is NA.

Virtualization based security, including Credential Guard, currently cannot be implemented in virtual desktop implementations (VDI) due to specific supporting requirements including a TPM, UEFI with Secure Boot, and the capability to run the Hyper-V feature within the virtual desktop.

For VDIs where the virtual desktop instance is deleted or refreshed upon logoff, this is NA.

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Device Guard >> "Turn On Virtualization Based Security" to "Enabled" with "Secure Boot" or "Secure Boot and DMA Protection" selected.

A Microsoft TechNet article on Credential Guard, including system requirement details, can be found at the following link.
https://technet.microsoft.com/en-us/library/mt483740%28v=vs.85%29.aspx