(MENAFN- Asia Times)
South Korea's spy agency said North Korean hackers were behind attacks on cryptocurrency exchanges this year in which some 7.6 billion won (US$6.99 million) worth of cryptocurrencies were stolen, a newspaper reported on Saturday.
The cyberattacks attributed to North Korean hackers also included the leaking of personal information from 36,000 accounts from the world's busiest cryptocurrency exchange Bitthumb in June, South Korea's Chosun Ilbo reported, citing the country's National Intelligence Service (NIS).
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Attacks also included the theft of cryptocurrencies from accounts at exchanges Yapizon, now called Youbit, and Coinis in April and September, it said.
The 7.6 billion won of stolen cryptocurrencies are now worth about 90 billion won ($82.7 million), Chosun Ilbo reported. It also cited the NIS as saying North Korean hackers had demanded 6 billion won from Bitthumb in return for deleting the leaked personal information.
Another cyberattack on about 10 cryptocurrency exchanges by North Korean hackers in October, using e-mails containing malware, was thwarted by the Korea Internet Security Agency (KISA), the newspaper reported.
The NIS found that the malware used in hacking the exchanges was made with the same method as malware used in hacking Sony Pictures and the central bank of Bangladesh in 2014 and 2016 respectively, Chosun Ilbo reported.
The NIS also said e-mails used in the attacks used North Korean Internet addresses, according to the newspaper.
The NIS declined to comment. Representatives for KISA, Bitthumb, Youbit and Coinis could not be reached for comment.
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