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Windows Defender AV must be configured to scan removable drives.


Overview

Finding ID Version Rule ID IA Controls Severity
V-213449 WNDF-AV-000025 SV-213449r569189_rule Medium
Description
This policy setting allows you to manage whether or not to scan for malicious software and unwanted software in the contents of removable drives such as USB flash drives when running a full scan. If you enable this setting removable drives will be scanned during any type of scan. If you disable or do not configure this setting removable drives will not be scanned during a full scan. Removable drives may still be scanned during quick scan and custom scan.
STIG Date
Microsoft Windows Defender Antivirus Security Technical Implementation Guide 2021-09-30

Details

Check Text ( C-14674r314656_chk )
Verify the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender Antivirus -> Scan -> "Scan removable drives" is set to "Enabled".

Procedure: Use the Windows Registry Editor to navigate to the following key:
HKLM\Software\Policies\Microsoft\Windows Defender\Scan

Criteria: If the value "DisableRemovableDriveScanning" is REG_DWORD = 0, this is not a finding.
Fix Text (F-14672r314657_fix)
Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender Antivirus -> Scan -> "Scan removable drives" to "Enabled".