The problem with Chinese hackers operating in the infrastructure of American entities was described in Cyber Defence24 in March. According to [published at the time](https://cyberdefence24.pl/cybersecurity/Chinese-hacker-in-action-victims- hundreds-entities-from-all-world) of the Mandiant report, **to gain access to the systems of companies in the U.S. defence sector was to become an adversary designated as UNC5174**.