How can we ignore these kind of hijacking/malware application as it is now a threat to those who mostly uses Android phones?
Best way is to use custom operating system for Android phones (Lineage, Graphene, Calyx, Divest) instead of default Android OS, but for most people this is a bit extreme step.
Regular people that still Android OS should limit the use of all apps and stop using Google Store, but move on some alternative like F-Droid or Aurora Store.
Anything related with cryptocurrencies should be verified with signature when download from official websites.
Electrum wallet have Android OS 5 support on their website, and don't use any unknown crypto apps that can't be verified.
You should be much safer after doing this.