One method of hacking they do commonly used these days is "phishing" .
Now phishing is a kind of hacking whereby the replicate already made apps that are popularly used, and sometimes unpopular apps are also used too , they also do fake emails too pretending to be people they're not , especially people close to you.
So when users try use this phished app the hacker gets hold of all the necessary information the need when the user inputs those information.
I've only falled for this kind of method once, when a friend of mine enlightened me on the situation.

Phishing hacks can come through so many ways, like email scams, duplicating applications softwares.e.t.c.
One of the many ways to prevent this is by insttalling anti-viruses and anti-malware soft ware because it helps as a counter force on phishing attacks.
nd also check every email carefully because when doing phishing attempts it's always easier for a hacker to make mistakes.