A security researcher for AVG has discovered a new piece of ransomware called Fantom that masquerades as a critical Windows update. Victims who fall for the ruse will see a Windows screen acting like it’s installing the update, but what’s really happening is that the user’s documents and files are being encrypted in the background.

Fantom

Source: Hot Hardware – Fantom Ransomware Poses As Windows Update, Encrypts Your Files For Fun