Microsoft Defender AV must enable network protection to be configured into block or audit mode on Windows Server.

Documentable No

Rule ID SV-278672r1144067_rule

CCI References

CCI-001170

Discussion

Microsoft's Exploit Guard comprises several techniques to defend against phishing attacks and malware. These include controlled folder access, attack surface reduction, and network protection.

Check Procedure

Verify the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Microsoft Defender Exploit Guard >> Network Protection >> This settings controls whether Network Protection is allowed to be configured into block or audit mode on Windows Server is set to "Enabled".

Procedure: Use the Windows Registry Editor to navigate to the following key: 
HKLM\Software\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\Network Protection

Criteria: If the value "AllowNetworkProtectionOnWinServer" 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 >> Microsoft Defender Exploit Guard >> Network Protection >> This settings controls whether Network Protection is allowed to be configured into block or audit mode on Windows Server to "Enabled".

Click "OK".

Click "Apply".