EN
The article deals with protective measures against cyberattacks of information systems of the critical infrastructures and highlights some features of the cyberattacks against the information resources of national authorities. The main objective of the article is to define the characteristics of cyberattacks and the elements of a plan to counter cyberattacks of the critical information facilities. It has been found that a professionally organized cyberattack consists of several phases related to targeting, intelligence, access to the system, direct execution of the attack, and destruction of evidence of unauthorized interference. The results show that to protect the critical infrastructure facilities from cyberattacks, developed and implemented national cybersecurity standards must be developed in Ukraine, in particular for automated control systems of critical infrastructure facilities.