SV-277993r1212171: Windows Server 2025 systems must have a Trusted Platform Module (TPM) enabled and ready for use. | Microsoft Windows Server 2025 STIG SCAP Benchmark

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Assessment Title

Rule Text

Windows Server 2025 systems must have a Trusted Platform Module (TPM) enabled and ready for use.

Description

Discussion Text

Credential Guard uses virtualization-based security to protect data that could be used in credential theft attacks if compromised. A number of system requirements must be met for Credential Guard to be configured and enabled properly. Without a TPM enabled and ready for use, Credential Guard keys are stored in a less secure method using software.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-004910

References

DPMS Target Microsoft Windows Server 2025 DISA DPMS Target Microsoft Windows Server 2025 5719

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

# Windows PowerShell
# Reconstructed from oval:mil.disa.stig.windows2025:def:277993
# Windows Server 2025 systems must have a Trusted Platform Module (TPM) enabled and ready for use.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# TPM is enabled
# wmi57_object (wmi57_test)
function test_1 {
  return ((((Get-CimInstance -Namespace 'root\cimv2\security\microsofttpm' -Query 'SELECT IsEnabled_InitialValue FROM Win32_Tpm' | Select-Object -First 1) | Select-Object -ExpandProperty 'IsEnabled_InitialValue') -eq '1') -or (((Get-CimInstance -Namespace 'root\cimv2\security\microsofttpm' -Query 'SELECT IsEnabled_InitialValue FROM Win32_Tpm' | Select-Object -First 1) | Select-Object -ExpandProperty 'IsEnabled_InitialValue') -eq '-1'))
}
# TPM is activated
# wmi57_object (wmi57_test)
function test_2 {
  return ((((Get-CimInstance -Namespace 'root\cimv2\security\microsofttpm' -Query 'SELECT IsActivated_InitialValue FROM Win32_Tpm' | Select-Object -First 1) | Select-Object -ExpandProperty 'IsActivated_InitialValue') -eq '1') -or (((Get-CimInstance -Namespace 'root\cimv2\security\microsofttpm' -Query 'SELECT IsActivated_InitialValue FROM Win32_Tpm' | Select-Object -First 1) | Select-Object -ExpandProperty 'IsActivated_InitialValue') -eq '-1'))
}
# TPM is owned
# wmi57_object (wmi57_test)
function test_3 {
  return ((((Get-CimInstance -Namespace 'root\cimv2\security\microsofttpm' -Query 'SELECT IsOwned_InitialValue FROM Win32_Tpm' | Select-Object -First 1) | Select-Object -ExpandProperty 'IsOwned_InitialValue') -eq '1') -or (((Get-CimInstance -Namespace 'root\cimv2\security\microsofttpm' -Query 'SELECT IsOwned_InitialValue FROM Win32_Tpm' | Select-Object -First 1) | Select-Object -ExpandProperty 'IsOwned_InitialValue') -eq '-1'))
}

if ((test_1 -and test_2 -and test_3)) {
  Write-Output "PASS"
} else {
  Write-Output "FAIL"
}

Assessment Script Powered by AISyntax-verified

A standalone PowerShell script to assess this control automatically. Review before running it in your environment.

Syntax-checked as valid PowerShell. Not executed here — running it for real needs the actual ms_windows_server_2025 target this check assesses.

# OVAL Definition: oval:mil.disa.stig.windows2025:def:277993
if (!(Get-CimInstance -ClassName Win32_Tpm -ErrorAction SilentlyContinue)) {exit 1} 
if (!(Get-CimInstance -ClassName Win32_Tpm -ErrorAction SilentlyContinue | Select-Object -ExpandProperty IsEnabled_InitialValue -ErrorAction SilentlyContinue) -match '(1|-1)') {exit 1}
if (!(Get-CimInstance -ClassName Win32_Tpm -ErrorAction SilentlyContinue | Select-Object -ExpandProperty IsActivated_InitialValue -ErrorAction SilentlyContinue) -match '(1|-1)') {exit 1}
if (!(Get-CimInstance -ClassName Win32_Tpm -ErrorAction SilentlyContinue | Select-Object -ExpandProperty IsOwned_InitialValue -ErrorAction SilentlyContinue) -match '(1|-1)') {exit 1}
exit 0

Remediation

Ensure systems have a TPM that is configured for use. (Version 2.0 supports Credential Guard.)

The TPM must be enabled in the firmware.

Run "tpm.msc" for configuration options in Windows.