Is it possible to crack ssh

It is a very fast, flexible, and new modules are easy to add in the attacks. This tool makes it possible for the researcher and security consultants to show how easy it would be to gain unauthorized access to a system remotely. We are using it the following way to crack the login. Where [- L] parameter is used to provide the username list and [- P] parameter used to provide the password list. Once the commands are executed it will start applying the dictionary attack and you will get the right username and password.

Medusa is a speedy, parallel, and modular tool which allows login through brute force. Its goal is to support as many services that allow authentication possible. The key features of this tool are thread-based testing, Flexible user input, Modular design, and Multiple protocols supported. We are going to run this command to crack this log in. Where [- h] use to assign the victim IP address, [- U] denotes the path for username list, [- P] denotes the path for the password list, [- M] to select the mode of attack.

Now, the process of the dictionary attack will start. Thus, we will attain the username and password of our victim. It is a GUI version of Hydra; it can be used for both offline and online password cracking.

It has all the features and benefits of Hydra in the GUI form. After opening this tool in the target, it will ask us about the target, service port number, protocol service name, and any other specific output option we want in our attack. But even that isn't bulletproof since SSH private key passwords can be cracked using John the Ripper. The standard way of connecting to a machine via SSH uses password-based authentication.

This has the advantage of being easier to set up but suffers security-wise due to being prone to brute-forcing and password guessing. Key-based authentication, on the other hand, uses cryptography to ensure secure connections. A key pair is generated consisting of a public and private key. The private key should be kept secret and is used to connect to machines that have the matching public key. The public key is used to encrypt communication that only the associated private key can decrypt.

This makes it nearly impossible for hackers to compromise SSH sessions unless they have access to the private key. The below steps assume you have already gained access to a target computer from your local machine. I'm using Kali Linux as the local box. To begin, let's create a new user on the target for demonstration purposes.

Use the adduser command, and enter a new password at the prompt:. The ssh-keygen utility can easily take care of this for us. Use the default location, which will create the file in our home directory:. We want our private key to be encrypted, so make sure to enter a password at the prompt we'll use the password abc just to keep it simple :.

Before we get cracking, we must first determine the system is running a SSH service. In a terminal, type: nmap -sV -p 22 ip the -sV is a service scan while -p is to scan specific ports in this case, port Once installed type in: medusa --help your screen should look like my screenshot:. A very basic syntax for Medusa is: medusa -h host -u username -P wordlist -M ssh. Depending on how big your wordlist is and how good your internet connection is, depends on how fast medusa will try to crack the password.

There are many different modules, but since we are cracking the SSH password the -M flag will be set to ssh. Final Words Welp, this tutorial is done and over with at least for now. On how to check SSH? Password cracking is a dead simple process granted, however there are some people here just entering the industry. I have to agree although we all were skiddies once This is very basic information which could help newbies.

However in my opinion, it somehow lacks background information.