#Hydra meaning password

r stands for “reverse.” If a user thought that they were clever and reversed their bad password, Hydra will catch that too.

#Hydra meaning password

s stands for “same.” Hydra will test the same password as the username, when using s. n stands for “null,” meaning that Hydra will test for a user not having a password. The letters nsr after the -e flag correspond to more ways to test. Sometimes users have passwords that are so amazingly bad that you have to account for them outside the normal scope of your wordlist. The -e flag gives you more options to test with. # hydra -l root -P /usr/share/wordlists/rockyou.txt 192.168.1.105 -t 4 -V ssh -e nsr If you would just like some more output but not everything, use -v. If you would like to see each test that Hydra runs, use -V. The -V just controls the verbosity of Hydra. To specify which port Hydra should attack, use the -s flag followed by the port number. If you’ve been hired to test someone else’s server, you can use Nmap to discover which port SSH is running on. If it’s your server, you will know the port that you need to specify. Clever admins change them all of the time. Not every SSH server is running on port 22. Of course, since this guide focuses only on SSH, so do the explanations of these flags. These flags range from more cosmetic in nature to actually altering the way it runs.

Like any good command line tool, Hydra has loads of flags to customize the way it runs. # hydra -L /usr/share/ -P /usr/share/wordlists/rockyou.txt -M Documents/ip.txt -t 4 ssh More Flags They can be specified with the -L flag for users, and the -M flag for IPs. Hydra also accepts wordlists for users and targets. That should be fast enough for you to see it run through and complete. # crunch 4 4 012345abcdef -o Documents/pass.txt If you want a quick one to test, spin up a short one with Crunch. There are literally millions of words in that list. # hydra -l root -P /usr/share/wordlists/rockyou.txt 192.168.1.105 -t 4 ssh Just decompress it, and it’s ready for Hydra to use. A good wordlist already exists at /usr/share/wordlists/. You can specify a wordlist instead of a single password by using -P instead of -p. While this is good, it’s not really practical to manually test every possible password. The last part just tells Hydra that it will be attacking SSH. The -t specifies the number of threads used. The IP is obviously the IP of the target machine. Okay, so the -l flag takes a single user parameter. The following linux command is very basic, and it will test the root user’s SSH password. Once you have your target machine’s IP, open up a terminal in Kali. Find that machine’s IP address, so you can point Hydra in its direction. This way, you aren’t disrupting anything going on on your network.

It’s probably best to use a virtual machine or something like a Raspberry Pi. To start off, pick a machine on your network to test. Hydra has very specific syntax, so be sure to follow closely. Since, this guide is using the command line, you have to familiarize yourself with Hydra’s syntax. There are both command line and graphical versions of Hydra, but this guide will use the command line. Only use it on your own systems and networks unless you have the written permission of the owner. If you aren’t familiar with wordlists yet, go check out our Crunch guide. This guide makes use of wordlists to provide Hydra with passwords to test. Sure, cPanel is a thing, but SSH is still there even when cPanel is being used. SSH is present on any Linux or Unix server and is usually the primary way admins use to access and manage their systems. Hydra has options for attacking logins on a variety of different protocols, but in this instance, you will learn about testing the strength of your SSH passwords. Hydra is a popular tool for launching brute force attacks on login credentials. Hail Hydra! Okay, so we’re not talking about the Marvel villains here, but we are talking about a tool that can definitely do some damage.