Microsoft Defender AV must block executable files from running unless they meet a prevalence, age, or trusted list criterion.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-278653	SRG-APP-000210	WNDF-AV-000049	SV-278653r1144045_rule	2025-11-25	2

Description
This policy setting blocks executable files, such as .exe, .dll, or .scr, from launching. Thus, launching untrusted or unknown executable files can be risky, as it might not be initially clear if the files are malicious.

ℹ️ Check
Verify the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Microsoft Defender Exploit Guard >> Attack Surface Reduction >> Configure Attack Surface Reduction rules 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\ASR\Rules Criteria: If the value "01443614-cd74-433a-b99e-2ecdc07bfc25" is REG_SZ = 2, this is not a finding. If the value is other than 2, this is a finding.

ℹ️ Check

Verify the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Microsoft Defender Exploit Guard >> Attack Surface Reduction >> Configure Attack Surface Reduction rules 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\ASR\Rules Criteria: If the value "01443614-cd74-433a-b99e-2ecdc07bfc25" is REG_SZ = 2, this is not a finding. If the value is other than 2, this is a finding.

✔️ Fix
Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Microsoft Defender Exploit Guard >> Attack Surface Reduction >> Configure Attack Surface Reduction rules to "Enabled". Under the policy option "Set the state for each ASR rule:", then click "Show". Enter GUID "01443614-cd74-433a-b99e-2ecdc07bfc25" in the "Value Name" column. Enter "2" in the "Value" column. Click "OK". Click "Apply".

✔️ Fix

Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Microsoft Defender Exploit Guard >> Attack Surface Reduction >> Configure Attack Surface Reduction rules to "Enabled". Under the policy option "Set the state for each ASR rule:", then click "Show". Enter GUID "01443614-cd74-433a-b99e-2ecdc07bfc25" in the "Value Name" column. Enter "2" in the "Value" column. Click "OK". Click "Apply".