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 response. They frequently receive alerts for known benign activities, such as penetration testing exercises or specific administrative scripts that are part of their routine operations. These alerts generate noise and distract analysts from real threats. The SOC team wants to reduce this noise by preventing these specific, known benign activities from generating alerts in Defender for Cloud. Which feature should they use?
- AContinuous export
- BAlert suppression rules
- CWorkflow automation
- DSecurity policy customization
Show answer & explanationAnswer & explanation
Correct answer: B. Alert suppression rules
Alert suppression rules in Microsoft Defender for Cloud allow you to dismiss or hide specific types of alerts based on criteria like alert name, entity, or subscription, preventing them from appearing in the portal and reducing alert fatigue for known benign activities.
Why the other options are wrong
- A. Continuous export streams alerts to other systems, but doesn't suppress them in Defender for Cloud itself.
- C. Workflow automation triggers actions based on alerts but doesn't prevent their generation or reduce noise from known benign activities.
- D. Security policy customization defines security standards, not for suppressing specific operational alerts.
Alert Suppression Rules (Defender for Cloud)
Alert suppression rules in Microsoft Defender for Cloud allow security teams to reduce alert fatigue by automatically dismissing or hiding specific alerts that are known to be benign, expected, or false positives, based on defined criteria.
- Reduces alert noise and false positives.
- Configurable based on alert name, entities, resource groups, etc.
- Helps SOC teams focus on critical threats.
Memory trick: Too much alert sound? Suppress the noise that's not profound.