North Korean hackers have hacked into more than 140,000 computers of at least 160 South Korean government agencies and companies. The cyber attack was designed to lay for a long term period against its rival, authorities in Seoul said. The South Korean police were on high alert against cyberattacks by North Korea, especially after North Korea successfully tested a miniaturized hydrogen bomb in January and a long-range rocket launch in February. The police declined to identify the malicious software, though the IP address from where the hack was originated was identical to one used in a 2013 cyberattack against banks and TV broadcasters in South Korea.
Source: https://thehackernews.com/2016/06/north-korean-hackers.html