Advanced Threat Modeling Fundamentals
Threat modeling is a structured approach to identifying, quantifying, and addressing security risks in systems and applications. It helps organizations understand their attack surface and prioritize security investments.
Threat Modeling Process
The threat modeling process typically follows these steps:
- Define the System: Understanding the system architecture and components
- Identify Assets: Cataloging valuable data and resources
- Identify Threats: Using frameworks to identify potential threats
- Analyze Vulnerabilities: Finding weaknesses that could be exploited
- Assess Risk: Evaluating the likelihood and impact of threats
- Mitigate Risks: Implementing controls to reduce risk
Threat Modeling Frameworks
Various frameworks help structure threat modeling:
- STRIDE: Microsoft's framework focusing on six threat categories
- PASTA: Risk-centric approach with seven stages
- OCTAVE: Operationally focused risk assessment
- Attack Trees: Hierarchical representation of attack scenarios
Threat Categories
Common threat categories include:
- Spoofing: Impersonating users or systems
- Tampering: Unauthorized modification of data
- Repudiation: Denying actions or transactions
- Information Disclosure: Unauthorized access to sensitive data
- Denial of Service: Disrupting system availability
- Elevation of Privilege: Gaining unauthorized access
Risk Assessment
Risk assessment involves evaluating threats:
- Likelihood: Probability of threat occurrence
- Impact: Potential damage from successful attacks
- Vulnerability: Susceptibility to specific threats
- Risk Score: Combined likelihood and impact assessment
Mitigation Strategies
Common mitigation approaches include:
- Prevention: Stopping threats before they occur
- Detection: Identifying threats when they occur
- Response: Reacting to identified threats
- Recovery: Restoring systems after incidents