A question concerning the murky ways of illegal software:
Who or what is the NSO group?
From the article on Lookout Blog:
Trident is used in a spyware product called Pegasus, which according to an investigation by Citizen Lab, is developed by an organization called NSO Group. NSO Group is an Israeli-based organization that was acquired by U.S. company Francisco Partners Management in 2010, and according to news reports specializes in “cyber war.” Pegasus is highly advanced in its use of zero-days, obfuscation, encryption, and kernel-level exploitation.
Business Insider also has a profile, but does not add substantially to the publicly known information.