South Korea was hit by a cyber attack on its nuclear power plant, causing the operator to conduct drills in order to test the ability of the nuclear plant to cope with a full-scale cyber-attack. A hacker posted leaked data revealing internal designs and manuals of the Gori-2 and Wolsong-1 nuclear reactors run by Korea Hydro and Nuclear Power Co. (KHNP) The company will also conduct extensive drills at four of its complexes next week. A Twitter account claiming to represent an anti-nuclear organisation based in Hawaii claimed responsibility for the attack.
Source: https://thehackernews.com/2014/12/Korea-nuclear-power-plant-hacked.html