Investigating Incidents with Microsoft Defender XDR

Introduction

Modern attacks rarely target a single service. Defender XDR correlates multiple alerts into one investigation experience.

Problem / Scenario

A user reports suspicious login activity after clicking a phishing email.

Prerequisites

• Microsoft Defender XDR
• Security Administrator role
• Defender for Endpoint enabled

Step-by-Step Configuration

1. Open Defender XDR Portal.
2. Navigate to Incidents.
3. Review correlated alerts.
4. Analyze Attack Story.
5. Check impacted devices.
6. Isolate endpoint if required.
7. Review remediation actions.

Screenshots

• Incident Dashboard
• Attack Story
• Device Timeline

Lessons Learned

• Correlated incidents reduce investigation time.
• Attack Story provides valuable context.
• Automated investigation saves manual effort.

Conclusion

Defender XDR enables security teams to investigate and respond faster using a unified security platform.