Access to a Graphical User Interface (GUI) allows a user to interact with a computer in a more visual manner than a CLI. A GUI allows users to move a cursor and click on interface objects, with a mouse and keyboard as the main input devices, as opposed to just using the keyboard. An adversary can use this access to execute programs and applications on the target machine. In the Ukraine 2015 Incident, Sandworm Team utilized HMI GUIs in the SCADA environment to open breakers.”]
Source: https://collaborate.mitre.org/attackics/index.php/Technique/T0823