Factbox: DarkSide hackers in focus after Toshiba attack

FILE PHOTO: The logo of Toshiba Corp at the company's headquarters in Tokyo, Japan, February 14, 2017. REUTERS/Toru Hanai/File Photo

(Reuters) - A unit of Japan's Toshiba Corp said on Friday it had been hacked in Europe by the DarkSide ransomware group widely believed to have been behind a crippling fuel pipeline attack in the United States this week.

WHO ARE DARKSIDE?