Microsoft Defender AV must enable the file hash computation feature.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-278661 | WNDF-AV-000057 | SV-278661r1190752_rule | CCI-001170 | medium |
| Description | ||||
| This policy drives the ability to enforce Indicators of Compromise (IoC) by using file hash allow/block indicators. | ||||
| STIG | Date | |||
| Microsoft Defender Antivirus Security Technical Implementation Guide | 2026-02-17 | |||
Details
Check Text (C-278661r1190752_chk)
Verify the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> MpEngine >> Enable file hash computation feature 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\MpEngine
Criteria: If the value "EnableFileHashComputation" is REG_DWORD = 1, this is not a finding.
If the value is 0, this is a finding.
Fix Text (F-83100r1190751_fix)
Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> MpEngine >>Enable file hash computation feature to "Enabled".