Found this today on a customer computer. Be always vigilant when reading your emails? Not expecting a parcel?

It came from an email purportedly from Australia Post with an attachment. When the user opens the attachment, a javascript program is automatically executed which goes right through your computer and encrypts every document and picture/photo. Within seconds everything is effectively gone. A message then pops up which displays a ransom message. If you want your stuff back, send me money.