Microsoft 365
TMA-M365-2.4.5
Ensure 'AIR' remediation is enabled
説明
Automated Investigation and Response (AIR) investigates alerts and correlates related signals into investigations. When AIR identifies malicious email messages, it groups them into clusters based on shared characteristics like common malicious file, URL, or sending attributes and produces remediation actions for each cluster. This setting controls whether AIR-identified malicious message clusters are remediated automatically, without requiring SecOps approval. Administrators can enable automatic remediation for one or more cluster types: - Similar files: Clusters sharing a similar malicious file - Similar URLs: Clusters sharing a similar malicious URL - Multiple similar attributes: Clusters grouped by multiple shared attributes such as sender IP address, sender domain, or message subject When enabled, the configured remediation action is applied immediately upon cluster identification...
チェック方法
監査方法: 手動レビュー
To audit using the UI: 1. Navigate to Microsoft Defender https://security.microsoft.com/ 2. Expand System > Settings > Email & collaboration > MDO automation settings. 3. Verify that under Message clusters the following are checked: o Similar files o Similar URLs o Multiple similar attributes Note: At the time of publication, Soft delete is the only available remediation action and is selected by default. Because the action cannot be changed, verifying the selected remediation action is not part of the audit criteria for this recommendation.
修正方法
修正方法: ガイダンスまたは IaC パッチ
To remediate using the UI: 1. Navigate to Microsoft Defender https://security.microsoft.com/ 2. Expand System > Settings > Email & collaboration > MDO automation settings. 3. Under Message clusters check the following: o Similar files o Similar URLs o Multiple similar attributes 4. Click Save to apply the changes.
プロパティ
- オペレーティングシステム
- すべて
- タグ
- m365saas
- 参照
- CIS Microsoft 365 Foundations Benchmark v7.0.0 - 2.4.5 Ensure 'AIR' remediation is enabled