https://www.bleepingcomputer.com/news/security/highly-targeted-attack-infects-only-13-iphones-in-india/

Mysterious malware has infected only 13 iPhones in India in what appears a highly targeted operation.

The attack has been carried out using something called an MDM, a mobile device management server that's normally used in enterprise environments for side-loading custom apps to employees, apps that aren't or can't be made available through the official iOS App Store due to their sensitive nature.