What is Brute Force? How it Works?

In this article, I’m going to explain Brute Force. At the end of this article, you will be able to explain that, what is Brute Force Attack, how it works, what is the main logic working behind this attack, and the most important, how you can prevent yourself from this attack.


Brute Force is a technique used by hackers to find user credentials. In this technique, hackers crack user credentials by trying various possible credentials. So, basically, Brute Forcing is not about exploiting any loophole or vulnerability of any website or web application.

It is all about trying various possible combinations and permutations of the password or username of your target. So, we can say Brute Forcing is all about guessing and trying username and password.

It is a trial and error method because in this technique you will have a large list of user names and passwords. In some cases, you may know the password priorly but you will have a large list of passwords then.

So, you have to try each possible combination and check whether you get the right combination or not.

Brute Force

As it is clear now that, you will need a user name list and a password list. In some cases, you may know the user name, then you will need a password list only, but in other cases, you will need both to perform this attack.

There are various tools that are used to perform the Brute Force attack. Some of the most popular tools are:

  • Metasploit
  • John the Ripper
  • Aircrack-ng
  • Hydra
  • Medusa

How Brute force Attack Works?

First of all, hackers feed the user name and password list to the Brute Force tool of their choice. It can be one user name and many passwords or many user names and many passwords.

Then that tool sends all possible combinations of provided user names and passwords to the target web application or application. After that Brute Force tool checks the authentication for that combination of user name and password.

And then the response of the web application analyzed, and then the tool decides the credentials were right or not. If the login will successful then, the tool will consider that combination of user name and password as right, and if the login will fail, then that combination of user name and password will be considered as wrong.

Then the Brute Force Application will try the next possible combination. It can take a lot of time, depending on the size of lists of user names and passwords provided. So, this is how the Brute Force works.

How you can prevent yourself

Some of the most common preventions methods are:

  1. Always use passwords with long lengths, because it is hard to guess long passwords, and it is a very time-consuming process to crack long passwords.
  2. Make your passwords more complex. Suppose your password contains numbers only, then it is very easy to crack because password generating tools will generate your password quickly. If you are using a combination of numbers. Alphabets (upper and lower case) and special characters, then your password will more complex. Which will difficult for hackers to crack.
  3. Use two-factor authentication. So, if a hacker will able to crack your password, then also he will not able to access your account.

So, this is all about Brute Forcing. I hope this article was informative. If you have any queries or doubt please ask in comments.

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