They are dubbing it “Triangulation”:
We believe that the main reason for this incident is the proprietary nature of iOS. This operating system is a “black box” in which spyware like Triangulation can hide for years. Detecting and analyzing such threats is made more difficult by Apple’s monopoly of research tools, making it the perfect haven for spyware. In other words, as I have said more than once, users are given the illusion of security associated with the complete opacity of the system. What actually happens in iOS is unknown to the cybersecurity experts.