Threat Modeling
Systematic threat modeling workshops to design security into applications from the ground up.
Threat Modeling
The cheapest security control is the one you design in from the start. Threat modeling is the systematic process of identifying what can go wrong with an application or system before it is built — so that security requirements are addressed in the design phase rather than patched in after deployment. Intelliroot's CREST-certified analysts facilitate structured threat modeling workshops using STRIDE, DREAD, and PASTA methodologies, working collaboratively with your architects, engineers, and product owners to build data flow diagrams, identify trust boundaries, enumerate threats, and translate them into prioritised, actionable security requirements.
Threat modeling is not a one-time exercise. We integrate the practice into your SDLC — establishing lightweight recurring threat models for new features alongside comprehensive deep-dives for major architectural changes, cloud migrations, or high-risk product launches. The result is a team that thinks like an attacker during design, a backlog of security requirements grounded in real risk, and an architectural security record that supports compliance evidence, customer due diligence, and regulatory submissions.
Why Threat Modeling Belongs in Every SDLC
Design-Phase Fixes Cost 100x Less
NIST research consistently shows that fixing a security flaw in the design phase costs 100 times less than fixing it post-deployment. Threat modeling is the highest-ROI security investment available to engineering teams.
Penetration Tests Cannot Fix Architecture
A penetration test finds vulnerabilities in what was built. Threat modeling prevents architectural weaknesses — broken trust boundaries, missing authentication layers, insecure inter-service communication — from being built in the first place.
Developer Security Thinking Scales
A facilitated threat modeling workshop trains your engineering team to reason about security as part of normal design discussion. The threat modeling mindset propagates organically — creating a lasting security culture rather than a point-in-time compliance exercise.
Required by Mature Security Frameworks
ISO 27001 Annex A.8.25, NIST SP 800-160, PCI DSS Requirement 6.3, SAFECode, and OWASP SAMM all include threat modeling as a required or recommended secure development practice. Our threat model artifacts serve as direct audit evidence.
What a Threat Modeling Engagement Covers
Architecture & Data Flow Analysis
- System context and component diagram review
- Data flow diagram (DFD) creation or validation
- Trust boundary identification and documentation
- Data classification and sensitivity mapping
- External dependency and integration mapping
Threat Enumeration & Methodology
- STRIDE threat enumeration per component and data flow
- PASTA process for attack simulation in risk context
- MITRE ATT&CK mapping for relevant threat actors
- Abuse case and misuse case development
- Threat library customisation for your industry
Risk Prioritisation & Requirements
- DREAD-based risk scoring and prioritisation
- Security control mapping to identified threats
- Actionable security requirements per finding
- Residual risk identification and acceptance criteria
- Countermeasure cost-benefit analysis
SDLC Integration & Developer Enablement
- Threat modeling process integration with your sprint cadence
- Lightweight threat model templates for feature teams
- Security champion training in threat modeling facilitation
- Threat model review checklist for design sign-off
- Tool configuration (OWASP Threat Dragon, IriusRisk, Miro)
Our Threat Modeling Approach
Scoping & Pre-Workshop Preparation
Gather system architecture documentation, existing design documents, and relevant compliance requirements. Identify workshop participants (architects, engineers, product owners, security champions), agree on scope boundaries, and prepare data flow diagram templates and threat enumeration worksheets in advance.
Architecture & Data Flow Mapping Workshop
Facilitate a collaborative session to build or validate data flow diagrams, identify all system components, map data stores and external entities, and agree on trust boundary placements. This shared understanding is the foundation all subsequent threat analysis depends on.
Threat Enumeration (STRIDE / PASTA)
Systematically apply STRIDE categories (Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, Elevation of Privilege) to each component and data flow. For higher-risk applications, layer in PASTA's attacker-centric simulation to identify threat scenarios from a motivated adversary's perspective.
Risk Prioritisation & Control Mapping
Score each identified threat using DREAD (Damage, Reproducibility, Exploitability, Affected Users, Discoverability) and contextual business impact. Map existing controls to threats, identify gaps, and produce a prioritised list of security requirements and architectural recommendations.
Security Requirements & Backlog Items
Translate threat model findings into actionable, developer-ready security requirements formatted as user stories or acceptance criteria. Estimate effort, suggest implementation patterns (e.g., specific library choices, authentication flow designs), and help the team integrate items into the product backlog with appropriate prioritisation.
Documentation, SDLC Integration & Champion Training
Produce the formal threat model document and lightweight templates for ongoing use. Deliver a security champion training session on threat modeling facilitation so your team can conduct lightweight models independently for future features. Establish the review cadence and sign-off criteria for design-phase security gates.
Frequently Asked Questions
Deliverables
Threat Model Report
Formal threat model document including DFDs, trust boundary maps, STRIDE threat register, DREAD risk ratings, and prioritised security requirements — suitable for compliance evidence and architectural review boards.
Risk-Rated Threat Register
Spreadsheet of all identified threats with DREAD scores, affected components, current control coverage, residual risk rating, and recommended countermeasures — a living document for ongoing security tracking.
Security Requirements Backlog
Developer-ready security requirements formatted as user stories or acceptance criteria, with effort estimates and suggested implementation patterns, ready for direct import into Jira or your preferred backlog tool.
Data Flow Diagrams
Professionally produced DFDs at context and component level, with trust boundaries, data stores, and external entities clearly annotated — serving as a durable architectural security reference.
Threat Modeling Templates & Champion Training
Lightweight threat modeling templates for ongoing use by feature teams, plus a security champion training session equipping your team to facilitate future incremental threat models independently.
SDLC Integration Playbook
Documented process for integrating threat modeling into your sprint cadence — including design gate criteria, review checklists, cadence recommendations, and tool configuration guidance.
Request a Security Assessment
Tell us about your environment and security objectives. We'll design a bespoke assessment and deliver a detailed proposal within 48 hours.