The -t 1 option allows only one task to run at a time to avoid security features that may shut down a high volume of attempts. The -P option tells Hydra to use words from the following text file. Then -L followed by the file containing the usernames we want to try. The first option is -V for verbose output. Here we will be passing a few options to Hydra. We will also create a list of usernames for the system to try and store them in the usernames.txt file. Using the cat command we can view the list we have assembled. Since Mangia (Italian for eat) is the name of the system, we will use a list of Italian foods. In this example, we will be using the information we already have about the system to build our own word list. There are also many additional password dictionaries available to download from online resources.

Penetration testing distributions like Kali Linux often come with a collection of word lists or dictionaries containing common passwords. We will be utilizing Hydra to perform a hybrid brute force dictionary attack on the Mangia system, but first, we need a dictionary.

Armed with this information, we will attempt a brute force attack on the discovered system. We also know that a user named John frequently uses this machine. We know there is a CentOS 7 system named Mangia with an IP address of 192.168.122.167. Our reconnaissance has discovered some information about users and systems on a network. The best way to explain how Hydra functions is to walk through a scenario, so I’m going to set the scene for you. Launching a Brute Force Attack with Hydra It has well thought out options that can generate words in a way that mimics common human password creation tendancies (i.e. RSMangler is a simple ruby tool designed to manipulate a wordlist or dictionary file. Because of its module engine, support for new services can easily be added. Hydra is capable of using many popular protocols including, but not limited to, RDP, SSH, FTP, HTTP and many others.

It is available on many different platforms such as Linux, Windows and even Android. Hydra is a password cracking tool used to perform brute force / dictionary attacks on remote systems.

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