As the article state it needs Root to do it.
And it do not say how you gets it.
So it's some code that need root access to mess with your phone.
So you properly just need to root your phone. And install an app that you have downloaded from some suspected webpage.
So is it a Trojan or just a feature from a rouge app/programmer?
Do not root your phone if you do not have any idea what you are doing and installing apps from every that you find.