米国：2017年9月の電力会社に対するサイバー攻撃はどこから？

下記の記事が出ている。

　Experts: North Korea Targeted U.S. Electric Power Companies
　NBC: October 10, 2017
　https://www.nbcnews.com/news/north-korea/experts-north-korea-targeted-u-s-electric-power-companies-n808996

　North Korean Hackers Hit U.S. Electric Companies with Spear Phishing Attacks
　eSecurity Planet: October 13, 2017
　https://www.esecurityplanet.com/threats/north-korean-hackers-hit-u.s.-electric-companies-with-spear-phishing-attacks.html