Recently during some research on encrypting ransomware we came across a new variant that brings some new features to the table. It will encrypt by utilizing the following javascript from being opened as an attachment from email (posing as some document file).
more here..........http://www.webroot.com/blog/2014/11/07/cryptobot/
more here..........http://www.webroot.com/blog/2014/11/07/cryptobot/