A technical analysis and interviews with computer security experts showed that the firm behind ToTok, Breej Holding, is most likely a front company affiliated with DarkMatter, an Abu Dhabi-based cyberintelligence and hacking firm where Emirati intelligence officials, former National Security Agency employees and former Israeli military intelligence operatives work. DarkMatter is under F.B.I. investigation, according to former employees and law enforcement officials, for possible cybercrimes. The American intelligence assessment and the technical analysis also linked ToTok to Pax AI, an Abu Dhabi-based data mining firm that appears to be tied to DarkMatter.