Cybercrime, new Android ransomware: AndroidOS/MalLocker.B Microsoft cybersecurity experts: The malware doesn’t encrypt the files. It blocks access to device by… Cybercrime, new Android ransomware: AndroidOS/MalLocker.B 13 October 2020 Francesco Bussoletti Cyber, Defence and Security Microsoft cybersecurity experts: The malware doesn’t encrypt the files. It blocks access to device by displaying a screen with the ransom note that appears over every other window.