What is Threat Modeling?

Threat modeling is a structured, proactive process for identifying, analyzing, and prioritizing potential security threats to a system before they can be exploited. Rather than reacting to attacks after they happen, threat modeling puts organizations in the mindset of an attacker — mapping out how a system could be compromised, then building defenses around the most likely and most damaging scenarios first.

It’s a core part of the software development lifecycle (SDLC), and it’s one of the foundational practices VerSprite uses to protect client data, applications, and networks from cyber threats.

The Four Main Threat Modeling Methodologies

Several frameworks exist for conducting a threat model, each with a different focus:

• PASTA (Process for Attack Simulation and Threat Analysis): A risk-based methodology that ties technical threats to business impact, extending security ownership beyond the IT department.
• STRIDE (Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, Elevation of Privilege): Categorizes threats by type, making it useful for identifying specific attack vectors during design.
• TRIKE: Focuses on defining security requirements and modeling how a system behaves under attack.
• VAST (Visual, Agile, and Simple Threat modeling): Built for scale, designed to integrate directly into Agile development workflows.

Each has its use case, but one methodology consistently stands out for organizations that want threat modeling tied directly to business risk: PASTA threat modeling.

What is the PASTA Threat Modeling 7 Steps Framework?

The 7 Steps of PASTA Threat Modeling

PASTA is a seven-stage methodology that embeds risk management directly into the development process, rather than treating security as a separate checklist:

1. Preparation — Define the objectives and scope of the threat model.
2. Application Decomposition — Map the architecture, components, and data flow of the system.
3. Threat Analysis — Identify potential threats using threat intelligence and attack pattern research.
4. Vulnerability Analysis — Examine the system for exploitable weaknesses.
5. Attack Enumeration — Model out realistic attack paths based on identified threats and vulnerabilities.
6. Risk and Impact Analysis — Score each threat by likelihood and potential business impact.
7. Countermeasure Analysis — Design and prioritize mitigations based on risk severity.

Because PASTA evaluates every threat in terms of its actual business impact, it gives security and business teams a shared language for prioritizing what gets fixed first — instead of treating every vulnerability as equally urgent.

Why PASTA Outperforms Other Threat Modeling Methods

• Business context — Ties every identified threat back to business goals and priorities, not just technical severity.
• Attacker perspective — Simulates how a real attacker would approach the system, rather than modeling threats abstractly.
• Risk-based prioritization — Ranks threats by potential impact, so teams spend resources where it matters most.
• Cross-functional collaboration — Pulls in stakeholders beyond security and engineering, building broader organizational buy-in.

Building a PASTA Threat Model That Fits Your SDLC

PASTA isn’t one-size-fits-all. Organizations running legacy waterfall processes and those running Agile sprints have both adapted PASTA’s seven stages to fit their own development timelines — treating each stage as modular, and adopting or deprioritizing specific activities based on internal capability and realistic delivery windows.

GitLab is a well-documented example: they built their own threat modeling program on top of PASTA, adapting the framework to their own engineering culture rather than applying it rigidly.

Frequently Asked Questions About Threat Modeling

What is the main goal of threat modeling?
The goal is to identify and prioritize security risks before they’re exploited, so teams can build defenses proactively rather than responding to breaches after they occur.

Is PASTA better than STRIDE?
PASTA and STRIDE solve different problems. STRIDE is faster for categorizing specific technical threats during design reviews. PASTA is more comprehensive — it ties those same threats to business impact and risk prioritization, making it a better fit for organizations that need security decisions to align with business objectives.

Who should be involved in threat modeling?
Effective threat modeling isn’t just an IT or security team exercise. PASTA specifically brings in developers, architects, and business stakeholders, since threats need to be evaluated against real business impact, not just technical severity.

When should threat modeling happen in the SDLC?
Ideally, threat modeling starts early — during design and architecture phases — and continues as a recurring practice as the application evolves, rather than a one-time assessment.

Get Expert Help With Threat Modeling

PASTA’s risk-based, collaborative framework makes it the strongest choice for organizations that want security built into their business processes — not bolted on afterward. VerSprite’s threat modeling experts can help you implement PASTA in a way that fits your existing development workflow.

Contact VerSprite to talk through what threat modeling could look like for your organization.