Agent skill
threat-modeling
Conduct threat modeling using STRIDE methodology. Identify threats, assess risks, and design security controls. Use when designing secure systems or assessing application security.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/threat-modeling
Metadata
Additional technical details for this skill
- author
- devops-skills
- version
- 1.0
SKILL.md
Threat Modeling
Identify and mitigate security threats during system design.
STRIDE Methodology
| Threat | Description | Mitigation |
|---|---|---|
| Spoofing | Pretending to be someone else | Authentication |
| Tampering | Modifying data | Integrity controls |
| Repudiation | Denying actions | Audit logging |
| Information Disclosure | Data exposure | Encryption |
| Denial of Service | Making service unavailable | Rate limiting |
| Elevation of Privilege | Gaining higher access | Authorization |
Process
steps:
1_scope:
- Define system boundaries
- Identify assets
- Document data flows
2_diagram:
- Create data flow diagrams
- Identify trust boundaries
- Mark entry points
3_identify:
- Apply STRIDE to each component
- List potential threats
- Document attack vectors
4_assess:
- Rate likelihood and impact
- Prioritize by risk score
5_mitigate:
- Design countermeasures
- Accept/transfer risks
- Document decisions
Data Flow Diagram
[External User] --> |HTTPS| --> [Load Balancer]
|
v
[Web Server]
|
[Trust Boundary]
|
v
[App Server] --> [Database]
Threat Cards
threat:
id: T001
name: SQL Injection
category: Tampering
component: Database queries
likelihood: High
impact: Critical
mitigations:
- Parameterized queries
- Input validation
- WAF rules
status: Mitigated
Best Practices
- Integrate into SDLC
- Review on architecture changes
- Include development team
- Document all decisions
- Regular reassessment
Related Skills
- sast-scanning - Code analysis
- penetration-testing - Validation
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