The South Korean National Intelligence Service (NIS) revealed that North Korea had hacked into smartphones belonging to a number of key government officials. The hackers also targeted the server of a major software firm specializing in providing security software for Internet banking and launched a spear-phishing campaign against employees of two provincial railway operators. North Korea has been mounting a series of attacks against our cyberspace following its nuclear test on January 6, revealed the NIS, adding they appeared to have been preparation for a major cyber assault on South Koreas banking network”]
Source: https://securityaffairs.co/wordpress/45139/cyber-warfare-2/north-korea-hacked-south-mobile.html