North Korean hackers ‘stole US, South Korean wartime plans’

North Korean hackers stole a huge trove of classified US and South Korean military documents last year, including a plan to “decapitate” the leadership in Pyongyang in the event of war, a lawmaker in Seoul said.

The purported revelations come at a time of heightened tensions over North Korea. US President Donald Trump recently said that “only one thing will work” when it comes to Pyongyang, hinting that he thinks diplomatic efforts are proving futile and military action may be necessary.

The Defence Minister in Japan, a close military ally of the United States, said that Trump might take such action against North Korea as soon as next month.

“I think President Trump will judge in the middle of November how effective pressure and other efforts have been,” Itsunori Onodera told reporters in Tokyo. “If there have been no changes from North Korea, it’s possible that the US will take severe measures.”

In Seoul, Rhee Cheol-hee, a lawmaker in the ruling Democratic Party and a member of the parliamentary national defence committee, said North Korean hackers broke into the Defence Integrated Data Centre in September last year to steal secret files, including American and South Korean “operational plans” for wartime action. The data centre is the main headquarters of South Korea’s defence network.

According to Rhee, the stolen documents included OPLAN 5015, a plan drafted two years ago for dealing with war with North Korea and said to include procedures to “decapitate” the North Korean leadership. He said the cache also included OPLAN 3100, outlining the military response to infiltration by North Korean commandos or another local provocation, as well as a contingency plan in case of a sudden change in North Korea. Pentagon spokesman Army Colonel Robert Manning said he was aware of media reports of the breach but would not say if sensitive operation documents were exposed. “We are confident in the security of our operations plans.”