I remember reading a news article from years back which claimed north korea trains 100 hackers every year:
NORTH KOREA'S SCHOOL FOR HACKERSIN NORTH KOREA'S mountainous Hyungsan region, a military academy specializing in electronic warfare has been churning out 100 cybersoldiers every year for nearly two decades.
Graduates of the elite hacking program at Mirim College are skilled in everything from writing computer viruses to penetrating network defenses and programming weapon guidance systems.
Or so South Korea's government would have the world believe.
Since at least 1994, military and intelligence officials in Seoul have warned of the growing threat posed by the "infowar" academy to the north, which they say was founded in the 1980s and is also known as the Automated Warfare Institute.
Most recently, South Korea's Defense Security Command raised the specter of Mirim at a cybersecurity seminar in mid-May, where a South Korean general noted that North Korea is "reinforcing its cyberterror capabilities."
https://www.wired.com/2003/06/north-koreas-school-for-hackers/ It wouldn't be that surprising if north korea is investing heavily in some type of electronic warfare program. The entire country is a rat's maze of underground tunnel networks designed to survive a nuclear apocalypse.
Yes, it's been going on for years that North Korean government allegedly training hackers in preparation of a cyber attack war. And I have read that they are now really targeting South Korean, specially like exchanges and other military institutions. We have even heard that Kim has a lot of bitcoin stash somewhere. This could be true as evident of an attack is proven to be really true by the North Koreans.
So I guess for the South then, be very careful of any suspicious email and improved the security of your Exchanges to prevent any possible hack for the other side.
The North Koreans easily hacked an exchange system in South Korea, this is a clear sign not to save all your crypto currencies in an exchange. The North Koreans easily grab some bitcoin money, which they can use it to build another missile or war weapons.
That is why we have preached here not to put all your investment in a exchange because first of all you don't have control of the private key and next this kind of scenario, a possible hack that will wipe out all of your funds.