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# Threat Dragon
## About
OWASP Threat Dragon is an **open-source threat modeling tool** that helps developers, security teams, and architects design **secure applications** by identifying potential **security threats** and **mitigation strategies** early in the software development lifecycle (SDLC). It provides a **visual interface** to create **data flow diagrams (DFDs)** and evaluate possible attack vectors.
{% hint style="info" %}
Refer to the Official OWASP Threat Dragon Page -
{% endhint %}
## Why is Threat Modeling Important?
Threat modeling is a **proactive security approach** used to **identify, analyze, and mitigate** security threats **before development** or **during early design stages**. OWASP Threat Dragon helps in:
* **Early detection of security vulnerabilities** before coding begins.
* **Reducing costs** by addressing security flaws before production.
* **Enhancing compliance** with security frameworks like OWASP ASVS, NIST, and ISO 27001.
* **Providing a structured method** for security analysis.
* **Integrating security into Agile & DevOps workflows**.
## Features of OWASP Threat Dragon
* **Visual Threat Modeling** – Allows creation of **data flow diagrams (DFDs)** to visualize application components, data flows, and trust boundaries.
* **Built-in Threat Libraries** – Provides **predefined attack patterns** and **security threats** for different components.
* **Security Controls & Mitigations** – Suggests **countermeasures** based on identified risks.
* **Supports STRIDE Threat Model** – Uses the **STRIDE methodology** (Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, Elevation of Privileges).
* **Integration with DevSecOps Pipelines** – Can be used in **CI/CD workflows** for automated security assessments.
* **Cross-Platform Support** – Available as a **web application** and **desktop application** for Windows, macOS, and Linux.
## How OWASP Threat Dragon Works
The tool follows a **systematic approach** to **threat modeling**:
### **Step 1: Define Scope and Components**
* Identify **application architecture** and **key components**.
* Define **data flows, entry points, and trust boundaries**.
### **Step 2: Create a Threat Model using Data Flow Diagrams (DFDs)**
* Design the system's **data flow** using **OWASP Threat Dragon's graphical interface**.
* Identify **actors, processes, data stores, and communication flows**.
### **Step 3: Identify Security Threats**
* Use the **STRIDE model** to categorize threats:
* **Spoofing** – Impersonating a user or system.
* **Tampering** – Altering data in transit or storage.
* **Repudiation** – Performing actions without traceability.
* **Information Disclosure** – Leaking sensitive data.
* **Denial of Service (DoS)** – Disrupting service availability.
* **Elevation of Privilege** – Gaining unauthorized access.
### **Step 4: Define Security Controls and Mitigation Strategies**
* Suggest **security countermeasures** for identified risks.
* Implement **OWASP ASVS** security requirements.
### **Step 5: Review and Iterate**
* Continuously update threat models as **architecture evolves**.
* **Re-evaluate risks** based on new security insights.
## OWASP Threat Dragon vs Other Threat Modeling Tools
Feature
OWASP Threat Dragon
Microsoft Threat Modeling Tool
IriusRisk
Open Source
Yes
No
No
STRIDE Support
Yes
Yes
Yes
Visual DFD Creation
Yes
Yes
Yes
Security Control Suggestions
Yes
Yes
Yes
Integration with CI/CD
Yes
No
Yes
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