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V-213450

CAT II (Medium)

Microsoft Defender AV must be configured to perform a weekly scheduled scan.

Rule ID

SV-213450r1260216_rule

STIG

Microsoft Defender Antivirus Security Technical Implementation Guide

Version

V2R10

CCIs

CCI-001241

Discussion

This policy setting allows specifying the day of the week on which to perform a scheduled scan. The scan can also be configured to run every day or to never run at all. This setting can be configured with the following ordinal number values: (0x0) Every Day (0x1) Sunday (0x2) Monday (0x3) Tuesday (0x4) Wednesday (0x5) Thursday (0x6) Friday (0x7) Saturday (0x8) Never (default) If this setting is enabled, a scheduled scan will run at the frequency specified. If this setting is disabled or not configured, a scheduled scan will run at a default frequency.

Check Content

Verify the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Scan >> "Specify the day of the week to run a scheduled scan" is set to "Enabled" and anything other than "Never" is selected in the drop-down box.
  
Procedure: Use the Windows Registry Editor to navigate to the following key: 
HKLM\Software\Policies\Microsoft\Windows Defender\Scan

If the value "ScheduleDay" is "REG_DWORD = 0x8", this is a finding.
Values of "0x0" through "0x7" are acceptable and not a finding.

Alternate Check (if Microsoft Intune applied this setting):

Navigate to "HKLM\Software\Policies\Microsoft\Windows Defender\Policy Manager".

If the value "ScheduleScanDay" is "REG_DWORD = 0x8", this is a finding.
Values of "0x0" through "0x7" are acceptable and not a finding.

Fix Text

Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Scan >> "Specify the day of the week to run a scheduled scan" to "Enabled " and select anything other than "Never" in the drop-down box.