SV-278651r1192812: Microsoft Defender AV must audit process creations originating from PSExec and WMI commands. | Microsoft Defender Antivirus STIG SCAP Benchmark

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Assessment Title

Rule Text

Microsoft Defender AV must audit process creations originating from PSExec and WMI commands.

Description

Discussion Text

This policy setting blocks processes created through PsExec and WMI from running. Both PsExec and WMI can remotely execute code. There is a risk of malware abusing functionality of PsExec and WMI for command and control purposes, or to spread an infection throughout an organization's network.

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

IA Controls

NIST SP 800-53

Not mappedCCI-001170

References

DPMS Target Microsoft Defender Antivirus DISA DPMS Target Microsoft Defender Antivirus 3985

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.windowsdefav:def:278651
# Microsoft Defender AV must audit process creations originating from PSExec and WMI commands.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# d1e49aac-8f56-4280-b9ba-993a6d77406c == 2
# 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 Defender\Windows Defender Exploit Guard\ASR\Rules').GetValueKind('d1e49aac-8f56-4280-b9ba-993a6d77406c').ToString()]) -eq 'reg_sz') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\ASR\Rules' -Name 'd1e49aac-8f56-4280-b9ba-993a6d77406c' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'd1e49aac-8f56-4280-b9ba-993a6d77406c') -eq '2'))
}

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_defender_antivirus target this check assesses.

# OVAL Definition: oval:mil.disa.stig.windowsdefav:def:278651
$regPath = "HKLM:\Software\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\ASR\Rules"
if (Test-Path $regPath) {
    $regValue = (Get-ItemProperty -Path $regPath -Name "d1e49aac-8f56-4280-b9ba-993a6d77406c").psobject.properties["d1e49aac-8f56-4280-b9ba-993a6d77406c"].Value
    if ($regValue -eq 2) { Write-Output "PASS"; exit 0 }
}
Write-Output "FAIL"; exit 1

Remediation

Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Microsoft Defender Exploit Guard >> Attack Surface Reduction >> Configure Attack Surface Reduction rules to "Enabled".

Under the policy option "Set the state for each ASR rule:", then click "Show".

Enter GUID "d1e49aac-8f56-4280-b9ba-993a6d77406c" in the "Value Name" column.

Enter "2" in the "Value" column.