Inside the Cunning, Unprecedented Hack of Ukraine’s Power Grid

Inside the Cunning, Unprecedented Hack of Ukraine’s Power Grid | WIRED
"IT WAS 3:30 p.m. last December 23, and residents of the Ivano-Frankivsk region of Western Ukraine were preparing to end their workday and head home through the cold winter streets.
Inside the Prykarpattyaoblenergo control center, which distributes power to the region’s residents, operators too were nearing the end of their shift.
But just as one worker was organizing papers at his desk that day, the cursor on his computer suddenly skittered across the screen of its own accord.
He watched as it navigated purposefully toward buttons controlling the circuit breakers at a substation in the region and then clicked on a box to open the breakers and take the substation offline. A dialogue window popped up on screen asking to confirm the action, and the operator stared dumbfounded as the cursor glided to the box and clicked to affirm. 
Somewhere in a region outside the city he knew that thousands of residents had just lost their lights and heaters.
The operator grabbed his mouse and tried desperately to seize control of the cursor, but it was unresponsive.
Then as the cursor moved in the direction of another breaker, the machine suddenly logged him out of the control panel..."