ReutersNorth Korean hackers behind attacks on cryptocurrency exchanges, South Korean newspaper reportsReutersSEOUL (Reuters) - South Korea's spy agency said North Korean hackers were behind attacks on cryptocurrency exchanges this year in which some 7.6 billion won ($6.99 million) worth of cryptocurrencies were stolen, a newspaper reported on Saturday. FILE ...North Korea 'hacked crypto-currency exchange in South'BBC NewsSuspected North Korean Cyber Group Seeks to Woo Bitcoin Job SeekersU.S.