Windows Defender AV must be configured for automatic remediation action to be taken for each threat alert level.

From Windows Defender Antivirus Security Technical Implementation Guide

Part of SRG-APP-000207

Associated with: CCI-001662

SV-89927r2_rule Windows Defender AV must be configured for automatic remediation action to be taken for each threat alert level.

Vulnerability discussion

This policy setting allows you to customize which automatic remediation action will be taken for each threat alert level. Threat alert levels should be added under the Options for this setting. Each entry must be listed as a name value pair. The name defines a threat alert level. The value contains the action ID for the remediation action that should be taken. Valid threat alert levels are: 1 = Low 2 = Medium 4 = High 5 = Severe Valid remediation action values are: 2 = Quarantine 3 = Remove 6 = Ignore

Check content

Verify the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender Antivirus -> Threats -> "Specify threat alert levels at which default action should not be taken when detected" is set to "Enabled" and "5-2, 4-2, 2-2, 1-2" is entered in the "Show" box option. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Windows Defender\Threats Criteria: If the value "Threats_ThreatSeverityDefaultAction" is REG_DWORD = 1, this is not a finding.

Fix text

Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender Antivirus -> Threats -> "Specify threat alert levels at which default action should not be taken when detected" to "Enabled" and enter "5-2, 4-2, 2-2, 1-2" in the "Show" box option.

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