ランサムウェアの75％はロシア製？

下記の記事が出ている。

　Three Quarters of All Ransomware Signed by Russian Speakers
　Softpedia: February 17, 2017
　http://news.softpedia.com/news/three-quarters-of-all-ransomware-signed-by-russian-speakers-513050.shtml

　Ransomware Growth Fueled By Russian-Speaking Cybercriminals
　DARK Reading: February 16, 2017
　http://www.darkreading.com/attacks-breaches/ransomware-growth-fueled-by-russian-speaking-cybercriminals/d/d-id/1328188