Microsoft Windows Defender Antivirus STIG: WNDF-AV-000027

Check: WNDF-AV-000027 (in versions v2 r2 through v1 r1)

Title

Windows Defender AV must be configured to turn on e-mail scanning. (Cat II impact)

Discussion

This policy setting allows you to configure e-mail scanning. When e-mail scanning is enabled the engine will parse the mailbox and mail files according to their specific format in order to analyze the mail bodies and attachments. Several e-mail formats are currently supported for example: pst (Outlook) dbx mbx mime (Outlook Express) binhex (Mac). If you enable this setting e-mail scanning will be enabled. If you disable or do not configure this setting e-mail scanning will be disabled.

Check Content

Verify the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender Antivirus -> Scan -> "Turn on e-mail scanning" is set to "Enabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Windows Defender\Scan Criteria: If the value "DisableEmailScanning" is REG_DWORD = 0, this is not a finding.

Fix Text

Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender Antivirus -> Scan -> "Turn on e-mail scanning" to "Enabled".

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CCIs

CCIs tied to check.
Number Definition
CCI-001170

The information system prevents the automatic execution of mobile code in organization-defined software applications.

Controls

Controls tied to check. These are derived from the CCIs shown above.
Number Title
SC-18 (4)

Prevent Automatic Execution