Risk Assessment

A cybersecurity risk assessment is a systematic process for identifying threats and vulnerabilities, evaluating their potential impact, and determining the appropriate security measures. It forms the foundation of an effective security strategy by ensuring resources are directed at the most significant risks.

Risk assessment process:

1. Asset identification: Catalogue systems, data, and resources
2. Threat identification: Identify potential threats to each asset
3. Vulnerability assessment: Identify weaknesses that threats could exploit
4. Likelihood analysis: Estimate the probability of each threat occurring
5. Impact analysis: Evaluate the potential damage if the threat materialises
6. Risk calculation: Risk = Likelihood × Impact
7. Risk prioritisation: Rank risks by severity
8. Mitigation planning: Determine appropriate responses for each risk

Risk response options:

• Mitigate: Implement controls to reduce likelihood or impact
• Transfer: Shift risk to another party (e.g., cyber insurance)
• Accept: Acknowledge and accept the risk (for low-severity risks)
• Avoid: Eliminate the risk by removing the activity or asset

Risk assessment frameworks:

• ISO 27005: Information security risk management standard
• NIST SP 800-30: Guide for conducting risk assessments
• ACSC risk management guidelines: Australian-specific guidance
• AS/NZS ISO 31000: Australian/New Zealand risk management standard
• FAIR: Factor Analysis of Information Risk (quantitative approach)

Key risk categories:

• Data breach and loss of personal information
• Ransomware and malware attacks
• Business email compromise and fraud
• Insider threats and employee negligence
• Third-party and supply chain risks
• System outage and business disruption