The new landscape of pre-installed mobile malware: malicious code within

Pre-installed means the malware comes already installed on a device at the system level, thus, it cannot be removed; only disabled. Remediating these iterations of pre-installed malware is possible by using a work-around to uninstall apps for the current user. Uninstalling some of these apps may degrade the user experience, but it isnt going to stop the device from functioning. The latest malware is targeting this location: /system/app/. The infection causes headaches as it repeatedly installs variants of Android/Trojan.HiddenAds.”]

Source: https://blog.malwarebytes.com/cybercrime/2019/01/the-new-landscape-of-preinstalled-mobile-malware-malicious-code-within/