Real-time Monitoring and Response
Implementation Effort: Medium
Setting up real-time monitoring and response requires integration with SIEM tools, configuring alert rules, and aligning with incident response workflows.
User Impact: Low
All actions are handled by security operations and platform teams; no direct user involvement is required.
Overview
Microsoft Defender for APIs provides real-time monitoring and response capabilities for APIs published through Azure API Management. It uses a combination of machine learning and rule-based analytics to detect threats such as those listed in the OWASP API Top 10, including broken authentication, excessive data exposure, and injection attacks 1.
Key Capabilities
- Runtime Threat Detection: Defender for APIs ingests live API traffic and analyzes it for anomalies and known attack patterns 1.
- Alerting: Security alerts are generated in real time and can be viewed in the Microsoft Defender for Cloud dashboard or forwarded to SIEM platforms like Microsoft Sentinel 1.
- SIEM Integration: Defender for APIs integrates with existing security operations workflows, enabling centralized investigation and response 1.
- API Endpoint Monitoring: Each API endpoint is monitored for authentication status, usage activity, and exposure to the internet 1.
- Inactive API Detection: Endpoints with no traffic for 30+ days are flagged as inactive, helping reduce unnecessary attack surface 1.
Response Actions
- Investigate alerts in Defender for Cloud or Sentinel.
- Trigger automated playbooks using SOAR tools or Power Automate.
- Disable or reconfigure vulnerable API endpoints.
- Update policies in Azure API Management to enforce authentication or rate limiting.
Without real-time monitoring and response, threats may go undetected until after exploitation. This capability supports the Zero Trust principle of "Assume breach" by enabling continuous detection and rapid response to API threats.