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Hackers steal Signal, WhatsApp user data with fake Android chat app
(www.bleepingcomputer.com)
This is a most excellent place for technology news and articles.
So, you actually have to install that app and run it?
And give it accessibility permission, which comes with a big fat warning. Basically you need to tell Android "yes, install and run this random app I don't really need, and give it access to all my info".