THC-Hydra Tool is a parallelized login cracker which supports numerous protocols to attack. It is very fast and flexible, and new modules are easy to add. This Tool makes it possible for researchers and security consultants to show how easy it would be to gain unauthorized access to a system remotely. The tool will work in 4 modes: one username & one password, one password list, one username and one password. It can be used to perform wordlist attack by using a wordlist containing most common passwords.”]
Source: https://gbhackers.com/online-password-bruteforce-attack-thc-hydra-tool-tutorial/