Ransomware
Sauron Locker
An Android ransomware that locks the device, changes the wallpaper, and demands money in exchange for unlocking the phone.
Sauron Locker is a Android ransomware.
Background
A piece of Android ransomware that locks the handset, swaps out the wallpaper, and demands payment before it will unlock the phone.
Source: Malpedia (Fraunhofer FKIE).