CISA and the National Security Agency (NSA) have published a joint cybersecurity advisory about control system defense for operational technology (OT) and industrial control systems (ICSs). Control System Defense: Know the Opponent is intended to provide critical infrastructure owners and operators with an understanding of the tactics, techniques, and procedures (TTPs) used by malicious cyber actors. This advisory builds on NSA and CISA 2021 guidance provided to stop malicious ICS activity against connect OT, and 2020 guidance to reduce OT exposure.
CISA and NSA encourage critical infrastructure owners and operations to review the advisory, [Control System Defense: Know the Opponent], and apply the recommended mitigations and actions. For more information on CISA’s resources and efforts to improve ICS cybersecurity, visit CISA’s role in industrial control systems webpage.