The US Federal Bureau of Investigation (FBI) has issued a Private Industry Notification warning of malicious cyber actors using proxies and configurations for credential stuffing attacks on organizations within the United States.
See: https://www.ic3.gov/Media/News/2022/220818.pdf
Credential stuffing is a form of brute force attack and shares many of the same commonalities that exploit leaked user credentials or ones purchased on the Dark Web that takes advantage of the fact that many individua