Since the other reply was unhelpful: apps are supposed to have limited privileges and isolation from each other, yes... But the whole point of malware like this is that they figure out ways to break those restrictions and get escalated privileged.
You can get more technical detail from reading the report, in this case it looks like the app does not contain malware, but instead requests an update after install that contains the bad code and then breaks the app limitations and scans for the target banking applications and copies the security certificates.
If you want a fun karaoke night, first song(s) need to be something that will get most everyone singing. Younger crowds: something like Tayor Swift "Shake It Off". Middle age crowds, something like Nirvana or Aerosmith. Older crowds any Beatles #1.
I personally like Cyprus Hill "Jump Around" if you're willing to learn it well enough beforehand as to not butcher the lyrics. I've seen Vanilla "Ice Ice Baby" also get a similar reaction of everyone knowing the song and enjoying it enough to give you kudos for choosing it.
After everyone's over the initial hesitation, go belt all your love songs and power ballads; but get the party started first.