Cloud Web Applications Threat Matrix: Microsoft Guide

Introduction

Microsoft has published a new cloud web applications threat matrix to help security teams better understand attacks targeting cloud-hosted web apps and serverless environments. For IT and security administrators, this is important because threats increasingly move across application code, workload identities, deployment pipelines, and cloud resources—not just a single layer of the stack.

What’s new

The new matrix is a MITRE ATT&CK-aligned framework designed specifically for cloud web applications and serverless platforms. It expands on Microsoft’s previous threat matrices for Kubernetes and storage services.

Microsoft organizes techniques across ATT&CK tactics, including:

• Resource Development
• Initial Access
• Execution
• Persistence
• Privilege Escalation
• Defense Evasion
• Credential Access
• Discovery
• Lateral Movement
• Collection
• Impact

Key threat examples highlighted

Microsoft’s post calls out several common attack paths defenders should evaluate:

• Subdomain takeover caused by stale DNS records pointing to reusable cloud endpoints
• Application vulnerabilities in public-facing apps, frameworks, or dependencies
• Code injection in connected repositories that auto-deploy to production
• Compromised container images in public or private registries
• Exposed admin interfaces such as deployment or management consoles
• Serverless trigger injection through manipulated uploads, queue messages, or API calls
• Misuse of deployment credentials to access SCM or deployment interfaces
• Cloud-native terminal abuse such as built-in management consoles

These examples reinforce that cloud app attacks often combine software flaws, weak configuration, and identity exposure.

Why this matters for administrators

For defenders, the biggest value of the matrix is visibility. Many organizations still investigate the application layer and the cloud platform separately, which can leave major blind spots.

Using this framework, security teams can:

• Identify detection and telemetry gaps
• Prioritize hardening of internet-facing apps and serverless workloads
• Improve threat modeling for DevOps and cloud-native applications
• Build more complete investigation playbooks across app, identity, and infrastructure layers

Recommended next steps

Administrators and security teams should consider the following actions:

1. Review public-facing cloud web apps and serverless functions against the matrix.
2. Audit deployment credentials, admin consoles, and source repository permissions.
3. Check for stale DNS records and potential subdomain takeover exposure.
4. Validate security controls for CI/CD pipelines, image registries, and event-driven triggers.
5. Update detection rules and incident response playbooks to cover both application and cloud control plane activity.

Final thoughts

Microsoft’s cloud web applications threat matrix gives defenders a practical way to map modern attack paths that span far beyond the web app itself. For organizations running Azure App Service, serverless workloads, or other cloud-native platforms, it provides a useful structure for hardening, monitoring, and incident response.