What is a required action to prevent malicious code according to CIP-007 R3?

The requirement outlined in CIP-007 R3 specifically focuses on the implementation of measures to detect or prevent malicious code from entering or affecting critical infrastructure systems. This entails having proactive mechanisms in place that can identify potentially harmful code before it can cause damage or compromise security.

Deploying methods to detect or prevent malicious code includes implementing anti-virus software, intrusion detection systems, or other similar tools that can monitor and analyze system behaviors for signs of malicious activity. This approach emphasizes a defensive strategy that is crucial for protecting sensitive systems within the scope of NERC CIP regulations.

While other actions like frequent system scans, optimizing configurations, and regularly updating software can enhance overall security posture, they do not specifically address the core requirement of detection and prevention of malicious code as dictated by CIP-007 R3. The focus there is squarely on establishing concrete measures that actively combat the entry and execution of malicious software, reinforcing the integrity and security of critical infrastructure.