N. Korea hackers 'suspected of stealing bitcoins

North Korea is suspected of intensifying cyber-attacks to steal virtual currency in order to obtain funds and avert tightening sanctions, according to security experts. North Korean hackers have mounted attacks on at least three South Korean cryptocurrency exchanges since May, security researcher FireEye said in a report Monday. Local news reports said that in May Yapizon had more than 3,800 bitcoins worth $15 million stolen -- although FireEye said there were no clear indications of North Korean involvement in that case.
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