The same whistleblower mentioned newly-created doge credentials being used to attempt login to the NLRB system from an IP address in Primorskiy Krai, the province around Vladivostock in Russias far east. They were blocked because the system doesn't allow non-US access even with proper credentials. There are many possible explanation for that since it's just an IP address.
This is some more detail about the whisteblower's testimony from an earlier Krebs article:
