Attack surface reduction rules

Concept

Rules in Microsoft Defender for Endpoint that block risky software behaviors commonly abused by malware, such as macros in Office files downloaded from the internet.

Title graphic: Attack surface reduction rules (Concept)

Type	Concept
Documentation	learn.microsoft.com/defender-endpoint/attack-surface-reduction-rules-overview

Articles about Attack surface reduction rules (2)

Microsoft Defender: エンドポイントのアタックサーフェス減少ルール
2026-03-06 · Mirko Peters
アタックサーフェス減少ルールでエンドポイントを強化します。高度な KQL クエリを使用して ASR ルールの有効性を監査し、検出精度の向上と除外設定の調整に役立てます。
Microsoft Defender: Attack Surface Reduction Rule for Endpoint
2026-03-06 · Mirko Peters
Harden endpoints with Attack Surface Reduction rules. Audit ASR rule effectiveness using advanced KQL queries for improved detection and exclusion tuning.

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Sources

Documentation: learn.microsoft.com/defender-endpoint/attack-surface-reduction-rules-overview
Feed for this topic (RSS): entity/attack-surface-reduction-rules/feed.xml
Articles on this topic: 2

Maintained by Mirko Peters (Microsoft MVP) · Last updated: 2026-11-06