Crooks have developed a strain of Android ransomware dubbed Doublelocker that both encrypts user data and changes PIN Lock. Ransomware demands 0.0130 BTC (approximately USD 73.83) the ransom payment must be completed within 24 hours. If the victim pays the ransom, he will receive the decryption key to unlock files and the crooks will remotely reset the PIN to unlock the victims device. The researchers highlighted that there is no way to unlock encrypted files for non-rooted devices, in this case, the unique way to clean the device is to factory reset their phone.”]
Source: https://securityaffairs.co/wordpress/64283/malware/doublelocker-android-ransomware.html