Microsoft Security Operations AnalystMitigate threats using Microsoft Defender for CloudMedium
A security operations center (SOC) team is using Microsoft Defender for Cloud for threat detection and incident response. They frequently receive alerts for benign activities, such as internal vulnerability scans from approved tools, which generate noise and distract analysts from critical threats. The team wants to suppress these specific alerts automatically based on their source IP address and alert type for a period of 90 days. Which Defender for Cloud feature should they use?
- AAlert suppression rules
- BSecurity Playbooks
- CWorkflow automation rules
- DCustom alert definitions
Show answer & explanationAnswer & explanation
Correct answer: A. Alert suppression rules
Alert suppression rules in Microsoft Defender for Cloud are specifically designed to filter out known benign or low-priority alerts based on various criteria like IP address, alert type, and entity. This helps reduce alert fatigue and allows analysts to focus on more critical threats.
Why the other options are wrong
- B. Security Playbooks (Azure Logic Apps) can automate responses but are generally triggered by alerts, not used to prevent their generation.
- C. Workflow automation rules are for triggering actions based on alerts, not for suppressing them.
- D. Custom alert definitions are for creating new alerts, not suppressing existing ones.
Defender for Cloud Alert Suppression
A feature in Microsoft Defender for Cloud that allows organizations to automatically dismiss or hide specific alerts based on defined criteria, reducing alert noise and improving analyst efficiency.
- Configurable by alert type, entity, IP address, etc.
- Can be set for a specific duration or indefinitely.
- Helps analysts focus on genuine threats.
Memory trick: Too many alerts? Suppress the noise, focus on the signal.