Xhelper has infected over 45,000 Android devices in the past six months. Malwarebytes researchers are still trying to pin down the infection vector used to distribute the malware. In the last month alone, an average of 131 devices have been infected daily. The malware can hide itself from users, download malicious apps onto the phone and display pop-up advertisements. None of the samples analyzed have been found in apps on the Google Play Store. Researchers urge users to keep their software up and only install apps from trusted sources.
Source: https://threatpost.com/android-malware-45k-devices-mystery/149654/