韓国：Bitcoin両替所Youbitが北朝鮮からとみられるサイバー攻撃を受けた後に破綻

下記の記事が出ている。

　South Korean cryptocurrency exchange to file for bankruptcy after hacking
　REUTERS: December 19, 2017
　https://www.reuters.com/article/us-bitcoin-exchange-southkorea/south-korean-cryptocurrency-exchange-to-file-for-bankruptcy-after-hacking-idUSKBN1ED0NJ

　North Korean hackers behind WannaCry, robbed millions in cryptocurrencies, say analysts
　International Business Times: December 20, 2017
　http://www.ibtimes.sg/north-korean-hackers-behind-wannacry-robbed-millions-cryptocurrencies-say-analysts-22052

　North Korea suspected in latest bitcoin heist, bankrupting Youbit exchange
　ars technica: December 21, 2017
　https://arstechnica.com/tech-policy/2017/12/north-korea-suspected-in-latest-bitcoin-heist-bankrupting-youbit-exchange/