What is the process called when an app from a source other t

What is the process called when an app from a source other than an official app store is installed on a device? Side-loading Rootkit Code injection Dropper

Solution

Answer: Rootkit

An app from source other than official app store is installed on a device s nothing but a Rootkit.

Rootkit is an application or set of applications that hides its existance and do some malware functions in background.