SV-278130r1181925: Windows Server 2025 Windows Remote Management (WinRM) service must not store RunAs credentials. | Microsoft Windows Server 2025 STIG SCAP Benchmark

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Assessment Title

Rule Text

Windows Server 2025 Windows Remote Management (WinRM) service must not store RunAs credentials.

Description

Discussion Text

Storage of administrative credentials could allow unauthorized access. Disallowing the storage of RunAs credentials for WinRM will prevent them from being used with plug-ins. Satisfies: SRG-OS-000373-GPOS-00156, SRG-OS-000373-GPOS-00157

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

IA Controls

NIST SP 800-53

Not mappedCCI-004895

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:278130
# Windows Server 2025 Windows Remote Management (WinRM) service must not store RunAs credentials.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies 'Disallow WinRM from storing RunAs credentials' is set to 'Enabled'
# registry_object (registry_test)
function test_1 {
  return (((@{String='reg_sz';ExpandString='reg_expand_sz';Binary='reg_binary';DWord='reg_dword';MultiString='reg_multi_sz';QWord='reg_qword';None='reg_none'}[(Get-Item -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WinRM\Service').GetValueKind('DisableRunAs').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WinRM\Service' -Name 'DisableRunAs' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'DisableRunAs') -eq 1))
}

if (test_1) {
  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:278130
if((Test-Path -Path "HKLM:\Software\Policies\Microsoft\Windows\WinRM\Service\DisableRunAs") -and ((Get-ItemProperty -Path "HKLM:\Software\Policies\Microsoft\Windows\WinRM\Service\DisableRunAs").DisableRunAs -eq 1)){Write-Output "PASS"; exit 0} else {Write-Output "FAIL"; exit 1}

Remediation

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Remote Management (WinRM) >> WinRM Service >> Disallow WinRM from storing RunAs credentials to "Enabled".