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Brute-Force attack using HYDRA

<div dir="ltr" style="text-align: left;" trbidi="on"><h3 style="text-align: left;">What is BRUTE-FORCE attack ?</h3><br />A password attack that does not attempt to decrypt any information, but continue to try different passwords. For example, a brute-force attack may have a dictionary of all words or a listing of commonly used passwords. To gain access to an account using a brute-force attack, a program tries all available words it has to gain access to the account. Another type of brute-force attack is a program that runs through all letters or letters and numbers until it gets a match.<br /><br /><h3 style="text-align: left;">How to install THC-hydra ?</h3><br />Open your terminal & type following command<br /><br />(1)sudo bash<br /><br />(2)wget http://freeworld.thc.org/releases/hydra-6.3-src.tar.gz<br /><br />(3)After downloading ,we are going to extract it<br /><br />tar -xvf hydra-6.3-src.tar.gz<br /><br />(4)tar -xvf hydra-6.3-src.tar.gz<br /><br />(5)./configure && make && install<br /><br />(6)make install<br /><br /><br /><h3 style="text-align: left;">How to use THC-hydra?</h3><br />If you are attacking FTP service then first make sure to run an nmap scan for any open FTP ports (by default it should be 21)<br /><br />Now in order to brute-force a specific login form you need to define the user-name (if you don't know it include a file containing some), the word-lists directory, the service attacking and form method and the page itself.<br /><br />Type following command in terminal<br /><br />hydra -l admin -P /root/pass  127.0.0.1 http-post-form "/mutillidae/index.php?page=login.php:username=^USER^&password=^PASS^&login-php-submit-button=Login:Not Logged In"<br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnNE7GTPVhtjN2r0EOchrPiGdDZvfLDexx1Srjk6gkRluI7Tn6BLG3S9an6mZC0n4DP_Q1zWGwIkkkaC3qe7TsMDQjupQCa3s4_HPnW5-mOdpVjKg3L-yoh7iondcKsYC_Vi7mP7QGd844/s1600/hydra.PNG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="hydra-bruteforce" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnNE7GTPVhtjN2r0EOchrPiGdDZvfLDexx1Srjk6gkRluI7Tn6BLG3S9an6mZC0n4DP_Q1zWGwIkkkaC3qe7TsMDQjupQCa3s4_HPnW5-mOdpVjKg3L-yoh7iondcKsYC_Vi7mP7QGd844/s1600/hydra.PNG" title="hydra-bruteforce" /></a></div><br />The -l switch defines the username and the capital -L - a list of usernames for the brute-force attack (if you don't know the login). <br /><br />The -p switch defines the password and the capital -P - the directory for the wordlists ( the -P is used almost always) <br /><br />If we're attacking a web form over http and the method is post then we use "http-post-form" if the service is FTP simply use "ftp". <br /><br />Another thing you should be aware of is that the variables username and password are not always the same. They different depending on the code. <br /><br />They could be usr,pwd etc - it's not necessarily for them to be as in most cases "username" & "password". Just view the source and make sure what their names are. <br /><br />Now there are a lot more options of Hydra. I'll explain some of them below no matter that they are included in the MAN page of hydra<br /><br />-vV - The verbose mode. This mode shows you every login attempt hydra tries. <br /><br />-s - We specify the port on which we're running our attack.<br /><br />-x - For brute-force parameters generation. We define our charset and minimum & maximum length of it.<br /><br />-R - Restores a previously aborted session of an attack.<br /><br />-e ns - Checks for blank or no password fields.<br /><br /></div>

Brute-Force attack using HYDRA

What is BRUTE-FORCE attack ? A password attack that does not attempt to decrypt any information, but continue to try different passwords. Fo...