“South Korea is investigating a suspected cyber-attack that paralysed systems at major media and banks on Wednesday, amid speculation that the North could be responsible.
The computer networks of three broadcasters – KBS, MBC and YTN – and two banks, Shinhan and Nonghyup, froze at around 2pm local time. Shinhan said its ATMs, payment terminals and mobile banking in the South were affected. TV broadcasts were not affected.”
Source:South Korea on alert for cyber-attacks after major network goes down | World news | guardian.co.uk