Decompiled source code for one of the oldest mobile and popular Android ransomware families has been published online. SLocker is mobile lock screen and file-encrypting ransomware that encrypts files on the phone and uses the Tor for command and control (C&C) communication. The malware has modified beyond just locking screens and demanding payment to taking over administrative rights and controlling the device’s microphone, speakers, and the camera. Users are always advised to follow some basic precautions in order to protect themselves against such threats.
Source: https://thehackernews.com/2017/07/android-ransomware-source-code.html