Building Your First Microsoft Sentinel Analytics Rule

Introduction

Microsoft Sentinel uses analytics rules to detect potential threats from collected log data.

Problem / Scenario

Detect multiple failed login attempts that may indicate a brute-force attack.

Prerequisites

• Azure Subscription
• Microsoft Sentinel Workspace
• Log sources connected

Step-by-Step Configuration

1. Open Microsoft Sentinel.
2. Go to Analytics.
3. Create Scheduled Rule.
4. Write or import KQL query.
5. Configure rule frequency.
6. Set incident creation options.
7. Test and enable the rule.

Screenshots

• Analytics Rules
• KQL Query
• Alert Configuration

Lessons Learned

• Start with Microsoft templates.
• Tune rules to reduce false positives.
• Validate results before production deployment.

Conclusion

Analytics rules form the foundation of proactive threat detection in Microsoft Sentinel.