Configure Attack Surface Reduction rules
- Policy ID
- ExploitGuard_ASR_Rules
- Scope
- Computer Configuration
- Supported on
- At least Windows Server 2016, Windows 10 Version 1709
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Windows Components › Microsoft Defender Antivirus › Microsoft Defender Exploit Guard › Attack Surface Reduction
Description
Set the state for each Attack Surface Reduction (ASR) rule.
After enabling this setting, you can set each rule to the following in the Options section:
- Block: the rule will be applied
- Audit Mode: if the rule would normally cause an event, then it will be recorded (although the rule will not actually be applied)
- Off: the rule will not be applied
- Not Configured: the rule is enabled with default values
- Warn: the rule will be applied and the end-user will have the option to bypass the block
Unless the ASR rule is disabled, a subsample of audit events are collected for ASR rules will the value of not configured.
Enabled:
Specify the state for each ASR rule under the Options section for this setting.
Enter each rule on a new line as a name-value pair:
- Name column: Enter a valid ASR rule ID
- Value column: Enter the status ID that relates to state you want to specify for the associated rule
The following status IDs are permitted under the value column:
- 1 (Block)
- 0 (Off)
- 2 (Audit)
- 5 (Not Configured)
- 6 (Warn)
Example:
xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx 0
xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx 1
xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx 2
Disabled:
No ASR rules will be configured.
Not configured:
Same as Disabled.
You can exclude folders or files in the ""Exclude files and paths from Attack Surface Reduction Rules"" GP setting.
Options
Registry
- ExploitGuard_ASR_Rules-
- (list values)REG_SZ