Build Remediation Logic
Implementation Effort: Medium — Building remediation logic requires setting up automation workflows using Azure Logic Apps, which involves configuration, testing, and role-based access setup.
User Impact: Low — These automations are triggered by security events and handled by backend systems, with no direct impact on end users.
Overview
Microsoft Defender for Cloud allows you to automate remediation actions across services like App Service, Key Vault, and Resource Manager using Workflow Automation. This feature helps reduce response time, enforce consistency, and minimize manual intervention in incident response processes.
Key Capabilities
- Trigger Conditions: Automations can be triggered by security alerts, recommendations, or compliance changes.
- Logic Apps Integration: You can define workflows using Azure Logic Apps to perform actions such as sending alerts, disabling accounts, or applying configuration changes 1.
Example Use Cases
- Defender for App Service: Automatically enforce HTTPS or disable a misconfigured app when a high-severity alert is triggered.
- Defender for Key Vault: Trigger an alert and restrict access if unusual access patterns are detected.
- Defender for Resource Manager: Revoke elevated permissions or notify admins when suspicious role assignments occur 1.
Steps to Build Remediation Logic
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Access Workflow Automation:
- Go to Microsoft Defender for Cloud > Workflow automation.
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Create a New Automation Rule:
- Click Add workflow automation.
- Define a name, description, and trigger conditions (e.g., alert severity, resource type).
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Link to a Logic App:
- Choose an existing Logic App or create a new one.
- Use built-in templates or define custom flows using connectors (e.g., email, Teams, Azure Functions).
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Deploy and Test:
- Deploy the Logic App and test it using simulated alerts or recommendations.
- Monitor execution logs to ensure the workflow behaves as expected 1.
These automations support the "Assume Breach" and "Verify Explicitly" principles of Zero Trust by ensuring rapid, consistent, and policy-driven responses to security threats.