KnockKnock

下記の記事が出ている。

　Forgotten Office 365 accounts targeted by stealthy attack campaign
　ZDNet: October 10, 2017
　http://www.zdnet.com/article/forgotten-office-365-accounts-targeted-by-stealthy-attack-campaign/

　KnockKnock cyber-attack targets corporate Office 365 accounts
　IT Pro: October 5, 2017
　https://www.itproportal.com/news/skyhighs-corporate-office-365-accounts-under-knockknock-attacks/