Hackers from North Korea are reported to have stolen a large cache of military documents from South Korea, including a plan to assassinate North Korea’s leader Kim Jong-un.
Rhee Cheol-hee, a South Korean lawmaker, said the information was from his country’s defense ministry.
The compromised documents include wartime contingency plans drawn up by the US and South Korea.
One of the plans included the South Korean military’s plan to remove the North Korean leader, Kim Jong-un, referred to as a “decapitation” plan, should war break out on the Korean Peninsula, the lawmaker, Rhee Cheol-hee, told reporters.
They also include reports to the allies’ senior commanders.
The South Korean defense ministry has so far refused to comment about the allegation.
Plans for the South’s special forces were reportedly accessed, along with information on significant power plants and military facilities in the South.
Mr. Rhee belongs to South Korea’s ruling party, and sits on its parliament’s defense committee. He said some 235 gigabytes of military documents had been stolen from the Defense Integrated Data Centre, and that 80% of them have yet to be identified.
The hack took place in September last year. In May, South Korea said a large amount of data had been stolen and that North Korea may have instigated the cyber-attack – but gave no details of what was taken.
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North Korea denied the claim.
South Korea’s Yonhap news agency reports that Seoul has been subject to a barrage of cyber-attacks by its communist neighbor in recent years, with many targeting government websites and facilities.
The isolated state is believed to have specially-trained hackers based overseas, including in China.
North Korea has accused South Korea of “fabricating” the claims.
News that Pyongyang is likely to have accessed the Seoul-Washington plans for all-out war in the Koreas will do nothing to soothe tensions between the US and North Korea.
The two nations have been at verbal loggerheads over the North’s nuclear activities, with the US pressing for a halt to missile tests and Pyongyang vowing to continue them.
The North recently claimed to have successfully tested a miniaturized hydrogen bomb, which could be loaded onto a long-range missile.
In a speech at the UN in September, US President Donald Trump threatened to destroy North Korea if it menaced the US or its allies, and said its leader “is on a suicide mission”.
Mr. Kim responded with a rare statement, vowing to “tame the mentally deranged US dotard with fire”.
Mr. Trump’s latest comment took the form of a cryptic tweet at the weekend, where he warned that “only one thing will work” in dealing with North Korea, after years of talks had proved fruitless. He did not elaborate further.