Joe, a technician at the local power plant, notices that several turbines had ramp up in cycles during the week. Further investigation by the system engineering team determined that a timed .exe…

Creating a dedicated VLAN for the SCADA system enforces network segmentation, preventing unauthorized devices or malicious traffic from reaching industrial control systems. This limits the attack surface by ensuring the ICS/SCADA environment is logically isolated from corporate or visitor-accessible networks. Network segmentation is a foundational control recommended by ICS security frameworks to contain threats introduced through physical or network-based vectors.

PKI (Public Key Infrastructure) for the mainframe addresses authentication and encryption, but does not isolate the SCADA network from other segments where the threat originated.

Patch management addresses software vulnerabilities over time but does not prevent or remediate the immediate risk posed by a planted executable on an already-compromised system.

WPA2 wireless security improvements address wireless network access, but the contractor access was physical and wired, making wireless hardening irrelevant to this attack vector.