Malware installing unwanted apps

[PEGEfounder]

The morning of the new year started with some sensles messages of "Super File Manager", an app, I never installed.
Same January 2nd.

January 3rd, I got unwanted "GO Wetter"

Today, January 4th, I got "Mehr Leistung", "Suberb Cleaner", "Super Locker"

This happens on my Doogee X5 MAX pro. A second phone from the same type has no problems.
It's Android 6.

I installed Kapersky and Malwarebytes, but they only see new apps, all is fine.

Any idea, how to detect and eliminate the malware installing all this apps?
I remove all unwanted installed apps immediately.

 

[B. Diddy]

Welcome to Android Central! Moved from General News to the General Help forum.

Did you get any system updates recently? Sometimes a manufacturer will include extra bloatware with a system update. If not, then it's more likely that you inadvertently installed some adware/malware that is automatically installing these apps. Are you able to uninstall these apps? If you can, then go to Settings>Security>Unknown Sources, and turn that off. This should prevent any app from reinstalling that isn't from Google Play Store.

 

[PEGEfounder]

I can uninstall all this unwanted apps.

They create a folder

MiniAppStore

Settings>Security>Unknown Sources is turned off.

Yesterday, I got again "Super Locker".

 

[B. Diddy]

Any recent system updates?

 

[PEGEfounder]

There was a system update January 16th 2017
Until this update, only my Doogee X5 MAX pro hat the unwanted installed apps problem.
Now I discovered the folder "MiniAppstore" also on the future X5 my daughter.

I give it only to her, when the flip arrives, so the only activity on this smartphone was the system update yesterday.

 

[B. Diddy]

It's not unheard of for the manufacturer to install additional bloat with a system update, so it might be "legitimate" (in that it's from the manufacturer), but that wouldn't make it any less annoying or unwanted. Try contacting the manufacturer to see if they can shed any light on this.