The first step to reduce the likelihood of infection from the attack is to identify systems that are vulnerable to being exploited by the attack. This would help the organization to assess the scope and severity of the risk, and to prioritize the systems that need immediate protection. Identifying systems that are vulnerable to being exploited by the attack would also help the organization to apply the appropriate patches, updates, or configurations to prevent or mitigate the attack, and to isolate or disconnect the systems that are already infected or compromised. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 2, Section 2.1.2, page 60123