I thought that it's not possible for any virus-like app to self-install apps on a mobile phone. But this is happening in the case of my friend. And I have no idea how to help him.
Namely, he has a Huawei G630 mobile phone. He wanted to download an MP3 song using the default Browser (not Chrome, but default one) and got a message like "you need to update the system before being able to listen this song". This was probably a trick to force him to install a virus-like app.
After that, each day at midnight, new apps start to get installed by itself. This is a screenshot of 4 apps installed on his phone.
I searched for Lutu and could not find it on the Play Store.
I also tried to find this 3rd app that does this, but in vain. I uninstalled a few suspicious apps and killed some services, but this did not help.
I also thought that this is a kind of an add-on in the default Browser (like I have it in Chrome), but I could not find add-ons in this app.
Any idea how to solve this issue?
NOTE: His Huawei is rooted so could the app be installed in the root section? This could explain why I cannot delete it as it's presented as a system app.