42 adware Android apps were developed by a Vietnamese university student who never bothered to hide his identity. ESET security researcher Lukas Stefanko has identified 42 rogue apps on Google Play Store with 8 million downloads. The rogue apps were initially distributed as legitimate applications but later updated to maliciously display full-screen advertisements to their users. If you have any of the below-listed rogue apps installed on your Android device, you are advised to uninstall it immediately. Apple iOS users are also advised to check their iPhones for these apps.
Source: https://thehackernews.com/2019/10/42-adware-apps-with-8-million-downloads.html