Title

Microsoft Defender AV must enable EDR in block mode. (Cat II impact)

Discussion

EDR in block mode allows Microsoft Defender Antivirus to take actions on post-breach, behavioral EDR detections. EDR in block mode is integrated with threat and vulnerability management capabilities.

Check Content

Verify the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Features >> Enable EDR in block mode is set to "Enabled"; otherwise, this is a finding. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Windows Defender\Features Criteria: If the value "PassiveRemediation" is REG_DWORD = 1, this is not a finding. If the value is 0, this is a finding.

Fix Text

Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Features >> Enable EDR in block mode to "Enabled". Click "OK". Click "Apply".

Additional Identifiers

Rule ID: SV-278674r1144071_rule

Vulnerability ID: V-278674

Group Title: SRG-APP-000210

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.