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Microsoft threat modeling tool

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Microsoft threat modeling tool

In today's digital landscape, where security breaches have become all too common, protecting sensitive information and safeguarding software systems is an absolute necessity. In this battle, the act of threat modeling emerges as a vital cornerstone, offering organizations a proactive approach to identify vulnerabilities, assess potential threats, and construct robust countermeasures. The Microsoft Threat Modeling Tool is a tool that can be used for this purpose. It is a an ally that empowers cybersecurity professionals to bolster their digital infrastructure. With its powerful capabilities, this software facilitates the threat modeling process. In this blog post, we delve into the intricacies of the Microsoft Threat Modeling Tool, exploring its key features, applications, and shedding light on the value it brings to the critical practice of threat modeling.

Logo of the Microsoft threat modeling tool

Image: Logo of the Microsoft threat modeling tool

Getting started

Upon launching the tool, we are greeted by a screen that provides us with two primary options: creating a new model or opening an existing one. Additionally, there is a link, directing us to the Microsoft getting started guide for further assistance.

Starting screen

Image: Starting screen

Design view


In the design view, the interface has different parts to it. On the left side, there's a grid where we can draw our application or system for threat modeling. On the right side, there's a list of symbols we can use to create diagrams. These symbols include things like requests and responses, Azure SQL databases, and network boundaries. We can simply drag and drop these symbols onto the grid to build our model. Design view

Image: Design view

Drawing a system

Now, let's build a practical example. The system we are modeling operates in the following manner:

Additionally, we establish a boundary named the 'Azure trust boundary,' which encompasses all the resources hosted within Azure. This ensures that communication between these services remains internal and confined to Azure. This looks as follows in the design view: Design view with an application diagram

Image: Design view with an application diagram

Analysis view

To access the 'Analysis view,' we can simply click on view > analysis view. In this mode, the tool automatically generates a comprehensive list of threats based on the diagram we created. For our specific application, we are presented with a list of 51 threats. You can view the list here: Analysis view

Image: Analysis view

Furthermore, the tool provides an option to export the list of threats as a CSV file, allowing us to import it into spreadsheet software like Excel for further analysis and manipulation. List of threats exported to Excel

Image: List of threats exported to Excel

This concludes the fundamental functionality of the Microsoft Threat Modeling Tool. It serves as a means to effectively communicate the security design of a system and automatically generates a list of potential threats based on that design.

Alternative tools

Threat modeling is an essential activity that can benefit from a diverse array of tools. While the Microsoft Threat Modeling Tool is certainly among them, it is by no means the sole option available. A plethora of other tools and platforms, both free and paid, are readily accessible for this purpose.