A side question, if I may:
Our business uses Dropbox to sync files across all the working computers, for collaboration, but also as backup should something goes wrong (stolen hardware, etc). Will these randsomwares also encrypt the Dropbox files that are synced locally on an infected computer, and then sync the encrypted files across all other computer, thereby corrupting all the original files (in cloud as well)?
If this is the case, what would be the easiest way of recovering all the original files from Dropbox?