Look up what the "rt" in "rt.com" stands for. Then ask yourself why this article doesn't link to the scary, scary report it talks about, doesn't quote anyone by name, and has a lot of other hallmarks of propaganda. What conclusion do you come to?
"The FBI, National Security Agency, and US Cybersecurity and Infrastructure Security Agency (CISA) released a report on Wednesday alleging that since at least January 2020, the hackers have been collecting information that is unclassified but contains “significant insight into US weapons platforms development and deployment timelines.”