North Korean hackers have used stolen residential details of a former South Korean government official to spread malware and gain access to their victims' computers, security researchers in Seoul told NK News.

“We are 100% sure the ‘Kimsuky’ group was behind this attack," Director at ESTsecurity Mun Chong Hyun said, referring to a group of hackers that has previously been linked to North Korea and had carried out similar attacks in November and January last year.