Help "Allow installation from unknown sources" keeps checking

[Venial]

Hello guys,

My phone is driving me crazy, it keeps ticking the "Allow installation from unknown sources" without asking me, and apps install by themselves (like "smarter flashlight" or "GO Clock"). Well they would, if I didn't have Avast Mobile Security, which tells me every time one tries to, so I have to constantly uninstall them and uncheck the "unknown sources".
I guess I have a malware or something like that but I really don't know where it could come from, since I only installed safe apps.

Any guesses, common stuff happening to others or advices to identify and remove the troublemaker?

(I'd rather not to have to do a factory reset if you know what I mean)

Thanks guys !

 

[Bg260]

That is not good. Definitely Malware! What phone?

 

[Venial]

That's what I thought. :/ My phone's a CUBOT Note.

 

[Bg260]

Ok. The best way to cure the problem would be to flash the factory firmware., I am not at all familiar with this device. I did find this:

http://firmwarefile.com/cubot-note-s

If this virus has taken over administrative features then it is probably entrenched in your system partition. This cannot be cleared with a standard factory reset.
The other possibility (very possible) is that this Malware is actually a part of the firmware. This is becoming more and more common in budget devices from foreign markets. So you could also give CUBOT a call.

 

[Venial]

Thanks a lot for the quick answer, I'll look into that and keep you posted for any update!