A Microsoft 365 administrator is configuring Microsoft Defender for Endpoint for a new set of Windows 11 client devices. The organization has a strict security posture that requires limiting the execution of unsigned scripts and potentially malicious macros in Office applications. The administrator wants to implement a proactive defense mechanism that blocks these types of activities without relying solely on signature-based detection. Which Defender for Endpoint capability should be used to achieve this goal?
- ANext-generation protection
- BAttack Surface Reduction (ASR) rules
- CEndpoint detection and response (EDR)
- DAutomated investigation and remediation
Show answer & explanationAnswer & explanation
Correct answer: B. Attack Surface Reduction (ASR) rules
Attack Surface Reduction (ASR) rules are designed to prevent actions and apps commonly used by malware to exploit devices and data. Specifically, ASR rules can block unsigned scripts, disable malicious macros, and prevent other risky behaviors, providing a proactive defense mechanism against exploits and fileless attacks.
Why the other options are wrong
- A. Next-generation protection focuses on traditional antivirus/anti-malware scanning and behavioral analysis against known threats, not specifically on blocking unsigned scripts or macro execution.
- C. EDR focuses on post-breach detection, investigation, and response, not on proactively preventing specific malicious behaviors like script or macro execution.
- D. Automated investigation and remediation automates actions after a threat is detected, rather than proactively preventing the initial execution of scripts or macros.
Defender for Endpoint Attack Surface Reduction (ASR) Rules
Attack Surface Reduction (ASR) rules in Microsoft Defender for Endpoint target common attack vectors and prevent behaviors often used by malware, such as blocking unsigned scripts, disabling malicious macros, and preventing execution of suspicious processes.
- Prevents common malware behaviors and exploits.
- Blocks unsigned scripts and malicious macros.
- Reduces the attack surface of devices.
- Part of proactive defense against fileless and advanced attacks.
Memory trick: ASR rules are like bouncers for your system, blocking suspicious behaviors before they cause trouble.