SV-213439r961089: Microsoft Defender AV must be configured to not allow override of scanning for downloaded files and attachments. | Microsoft Defender Antivirus STIG SCAP Benchmark

Loading benchmark…

Assessment Title

Rule Text

Microsoft Defender AV must be configured to not allow override of scanning for downloaded files and attachments.

Description

Discussion Text

This policy setting configures a local override for the configuration of scanning for all downloaded files and attachments. This setting can only be set by Group Policy. If this setting is enabled, the local preference setting will take priority over Group Policy. If this setting is disabled or not configured, Group Policy will take priority over the local preference setting.

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

IA Controls

NIST SP 800-53

Not mappedCCI-001169SV-89895V-75215

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.defenderantivirus:def:14
# Microsoft Defender AV must be configured to not allow override of scanning for downloaded files and attachments.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# 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\Real-Time Protection').GetValueKind('LocalSettingOverrideDisableIOAVProtection').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection' -Name 'LocalSettingOverrideDisableIOAVProtection' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'LocalSettingOverrideDisableIOAVProtection') -eq 0))
}

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.defenderantivirus:def:14
$compliant = Test-Path -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\LocalSettingOverrideDisableIOAVProtection" -Value 0
if ($compliant) { Write-Output "PASS"; Exit 0 } else { Write-Output "FAIL"; Exit 1 }

Remediation

Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Real-time Protection >> "Configure local setting override for scanning all downloaded files and attachments" to "Disabled" or "Not Configured".