100 Days of Cloud – Day 70: Microsoft Defender for Cloud

Its Day 70 of my 100 Days of Cloud journey, and todays post is all about Azure Security Center! There’s one problem though, its not called that anymore ….

At Ignite 2021 Fall edition, Microsoft announced that the Azure Security Center and Azure Defender products were being rebranded and merged into Microsoft Defender for Cloud.

Overview

Defender for Cloud is a cloud-based tool for managing the security of your multi-vendor cloud and on-premises infrastructure. With Defender for Cloud, you can:

  • Assess: Understand your current security posture using Secure score which tells you your current security situation: the higher the score, the lower the identified risk level.
  • Secure: Harden all connected resources and services using either detailed remediation steps or an automated “Fix” button.
  • Defend: Detect and resolve threats to those resources and services, which can be sent as email alerts or streamed to SIEM (Security, Information and Event Management), SOAR (Security Orchestration, Automation, and Response) or IT Service Management solutions as required.
Image Credit: Microsoft

Pillars

Microsoft Defender for Cloud’s features cover the two broad pillars of cloud security:

  • Cloud security posture management

CSPM provides visibility to help you understand your current security situation, and hardening guidance to help improve your security.

Central to this is Secure Score, which continuously assesses your subscriptions and resources for security issues. It then presents the findings into a single score and provides recommended actions for improvement.

The guidance in Secure Score is provided by the Azure Security Benchmark, and you can also add other standards such as CIS, NIST or custom organization-specific requirements.

  • Cloud workload protection

Defender for Cloud offers security alerts that are powered by Microsoft Threat Intelligence. It also includes a range of advanced, intelligent, protections for your workloads. The workload protections are provided through Microsoft Defender plans specific to the types of resources in your subscriptions.

The Defender plans page of Microsoft Defender for Cloud offers the following plans for comprehensive defenses for the compute, data, and service layers of your environment:

Microsoft Defender for servers

Microsoft Defender for Storage

Microsoft Defender for SQL

Microsoft Defender for Containers

Microsoft Defender for App Service

Microsoft Defender for Key Vault

Microsoft Defender for Resource Manager

Microsoft Defender for DNS

Microsoft Defender for open-source relational databases

Microsoft Defender for Azure Cosmos DB (Preview)

Azure, Hybrid and Multi-Cloud Protection

Defender for Cloud is an Azure-native service, so many Azure services are monitored and protected without the need for agent deployment. If agent deployment is needed, Defender for Cloud can deploy Log Analytics agent to gather data. Azure-native protections include:

  • Azure PAAS: Detect threats targeting Azure services including Azure App Service, Azure SQL, Azure Storage Account, and more data services.
  • Azure Data Services: automatically classify your data in Azure SQL, and get assessments for potential vulnerabilities across Azure SQL and Storage services.
  • Networks: reducing access to virtual machine ports, using the just-in-time VM access, you can harden your network by preventing unnecessary access.

For hybrid environments and to protect your on-premise machines, these devices are registered with Azure Arc (which we touched on back on Day 44) and use Defender for Cloud’s advanced security features.

For other cloud providers such as AWS and GCP:

  • Defender for Cloud CSPM features assesses resources according to AWS or GCP’s according to their specific security requirements, and these are reflected in your secure score recommendations.
  • Microsoft Defender for servers brings threat detection and advanced defenses to your Windows and Linux EC2 instances. This plan includes the integrated license for Microsoft Defender for Endpoint amongst other features.
  • Microsoft Defender for Containers brings threat detection and advanced defenses to your Amazon EKS and Google’s Kubernetes Engine (GKE) clusters.

We can see in the screenshot below how the Defender for Cloud overview page in the Azure Portal gives a full view of resources across Azure and multi cloud sunscriptions, including combined Secure score, Workload protections, Regulatory compliance, Firewall manager and Inventory.

Image Credit: Microsoft

Conclusion

You can find more in-depth details on how Microsoft Defender for Cloud can protect your Azure, Hybrid and Multi-Cloud Workloads here.

Hope you enjoyed this post, until next time!

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