MT.1149 - Behavior Monitoring should be enabled

Overview

Verify that behavior monitoring is enabled - prerequisite for EDR capabilities.

Disabled behavior monitoring reduces ability to detect zero-day threats and advanced persistent threats.

Remediation action:

1. Open Microsoft Endpoint Manager > Endpoint Security > Antivirus
2. Edit the relevant Microsoft Defender Antivirus policy
3. Enable Allow Behavior Monitoring

Related links

• Configure Microsoft Defender Antivirus
• Microsoft Endpoint Manager

Test Metadata

Field	Value
Test ID	MT.1149
Severity	High
Suite	Maester
Category	Defender
PowerShell test	Test-MtMdeBehaviorMonitoring
Tags	Defender, Maester, MT.1149

Source

• Pester test: tests/Maester/Defender/Test-MtMdeAntivirusPolicy.Tests.ps1
• PowerShell source: powershell/public/maester/defender/Test-MtMdeBehaviorMonitoring.ps1