Malware
FileCoder
According to heimdal, A new strain of ransomware emerged on Android mobile devices.
FileCoder is a Android malware family.
Background
Heimdal reports the appearance of a new ransomware strain on Android devices that affects systems running Android 5.1 or later. Researchers named this Android ransomware FileCoder (Android/Filecoder.c), and it propagates through text messages carrying a malicious link.
Source: Malpedia (Fraunhofer FKIE).