The Asus ZenFone 4 Selfie Android device with a build fingerprint of Android/sdm660_64/sdm660_64:8.1.0/OPM1/14.2016.1802.247-20180419:user/release-keys contains a pre-installed app with a package name of com.log.logservice app (versionCode=1, versionName=1) that allows any app co-located on the device to modify a system property through an exported interface without proper authorization.