Password Cracking

How To: Brute-Force SSH, FTP, VNC & More with BruteDum

Brute-forcing is an easy way of discovering weak login credentials and is often one of the first steps when a hacker finds network services running on a network they gain access to. For beginners and experienced hackers alike, it's useful to have access to the right tools to discover, classify, and then launch customized brute-force attacks against a target. BruteDum does it all from a single framework.

How To: Crack WPA & WPA2 Wi-Fi Passwords with Pyrit

Pyrit is one of the most powerful WPA/WPA2 cracking tools in a hacker's arsenal, with the ability to benchmark a computer's CPU speeds, analyze capture files for crackable handshakes, and even tap into GPU password-cracking power. To demonstrate how quickly it can hack a WPA/WPA2 password, we'll use it to play a Wi-Fi hacking CTF game anyone can practice for less than $10.

How To: Use John the Ripper in Metasploit to Quickly Crack Windows Hashes

There are many password-cracking tools out there, but one of the mainstays has always been John the Ripper. It's a powerful piece of software that can be configured and used in many different ways. Metasploit actually contains a little-known module version of JTR that can be used to quickly crack weak passwords, so let's explore it in an attempt to save precious time and effort.

How To: Crack SSH Private Key Passwords with John the Ripper

Secure Shell is one of the most common network protocols, typically used to manage remote machines through an encrypted connection. However, SSH is prone to password brute-forcing. Key-based authentication is much more secure, and private keys can even be encrypted for additional security. But even that isn't bulletproof since SSH private key passwords can be cracked using John the Ripper.

How To: Brute-Force Nearly Any Website Login with Hatch

The tactic of brute-forcing a login, i.e., trying many passwords very quickly until the correct one is discovered, can be easy for services like SSH or Telnet. For something like a website login page, we must identify different elements of the page first. Thanks to a Python tool for brute-forcing websites called Hatch, this process has been simplified to the point that even a beginner can try it.

How To: Exploit Recycled Credentials with H8mail to Break into User Accounts

Many online users worry about their accounts being breached by some master hacker, but the more likely scenario is falling victim to a bot written to use leaked passwords in data breaches from companies like LinkedIn, MySpace, and Tumblr. For instance, a tool called H8mail can search through over 1 billion leaked credentials to discover passwords that might still be in use today.

How To: Crack Shadow Hashes After Getting Root on a Linux System

After gaining access to a root account, the next order of business is using that power to do something more significant. If the user passwords on the system can be obtained and cracked, an attacker can use them to pivot to other machines if the login is the same across systems. There are two tried-and-true password cracking tools that can accomplish this: John the Ripper and Hashcat.

How To: Use Beginner Python to Build a Brute-Force Tool for SHA-1 Hashes

Developers creating login systems know better than to store passwords in plain text, usually storing hashes of a password to prevent storing the credentials in a way a hacker could steal. Due to the way hashes work, not all are created equal. Some are more vulnerable than others, and a little Python could be used to brute-force any weak hashes to get the passwords they were created from.

How To: Create Custom Wordlists for Password Cracking Using the Mentalist

Beginners learning brute-forcing attacks against WPA handshakes are often let down by the limitations of default wordlists like RockYou based on stolen passwords. The science of brute-forcing goes beyond using these default lists, allowing us to be more efficient by making customized wordlists. Using the Mentalist, we can generate millions of likely passwords based on details about the target.

Hack Like a Pro: How to Crack Online Web Form Passwords with THC-Hydra & Burp Suite

Welcome back, my hacker novitiates! In an earlier tutorial, I had introduced you to two essential tools for cracking online passwords—Tamper Data and THC-Hydra. In that guide, I promised to follow up with another tutorial on how to use THC-Hydra against web forms, so here we go. Although you can use Tamper Data for this purpose, I want to introduce you to another tool that is built into Kali, Burp Suite.

Hack Like a Pro: How to Crack Passwords, Part 5 (Creating a Custom Wordlist with CeWL)

Welcome back, my novice hackers! In my series on cracking passwords, I began by showing off some basic password-cracking principles; developed an efficient password-cracking strategy; demonstrated how to use Hashcat, one of the most powerful password-cracking programs; and showed how to create a custom wordlist using Crunch. In this tutorial, I will show you how to create a custom wordlist based upon the industry or business of the targets using CeWL.

Hack Like a Pro: How to Crack Passwords, Part 3 (Using Hashcat)

Welcome back, my greenhorn hackers! Continuing with my series on how to crack passwords, I now want to introduce you to one of the newest and best designed password crackers out there—hashcat. The beauty of hashcat is in its design, which focuses on speed and versatility. It enables us to crack multiple types of hashes, in multiple ways, very fast.

Hack Like a Pro: How to Crack Passwords, Part 2 (Cracking Strategy)

Welcome back, my hacker apprentices! Last week, I started off my password cracking series with an introduction on the principles and technologies involved in the art of cracking passwords. In past guides, I showed some specific tools and techniques for cracking Windows, online, Wi-Fi, Linux, and even SNMP passwords. This series is intended to help you hone your skills in each of these areas and expand into some, as yet, untouched areas.

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