This public service announcement from WordFence

WannaCrypt

This is another Wordfence public service announcement (PSA) that describes new WannaCry ransomware variants that have emerged in the past few hours and describes how to protect yourself against the WannaCry ransomware, also known as the WannaCrypt ransomware. We occasionally send out alerts that are outside the WordPress space when we feel that they are in the interests of our WordPress publishers and the broader global community. This is, unfortunately, one of those alerts….

Read more here WannaCry Ransomware and How to Protect Yourself