Microsoft Defender AV must enable EDR in block mode.

Documentable No

Rule ID SV-278674r1144071_rule

CCI References

CCI-001170

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 Procedure

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 Action

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".