1.0 Introduction
Recently, 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).

2.0 Impact
“Control System Defense: Know the Opponent” is intended to provide critical infrastructure owners and operators with an understanding of the tactics, techniques, and procedures (TTP) used by malicious cyber actors.

3.0 Recommendations
MyCERT encourages critical infrastructure owners and operations to review the advisory, “Control System Defense: Know the Opponent”, and apply the recommended mitigations and actions.

Generally, MyCERT advises the users of these devices to be updated with the latest security announcements by the vendor and follow best practices and security policies to determine which updates should be applied.