Password Cracking in NT

Before you learn how to use L0phtCrack with Win2K, it helps to understand how password cracking works in NT, and then extend that process to Win2K. (If you are already an expert NT password cracker, feel free to skip ahead.) NT stores a hash, but not the clear text password, of each user's password in the domain controller’s SAM database. If you're not familiar with the SAM, it is a Registry hive file found in %systemroot%\system32\config. Using your administrator authority, L0phtCrack pulls the hashes from the SAM and cracks the hashes by exploiting weaknesses in NT’s hashing algorithm.

To crack a password hash, L0phtCrack first performs a dictionary attack by iterating through a list of common words. L0phtCrack hashes each word in the list and compares that hash to the hash from the SAM. If the hashes match, L0phtCrack has the password. Once L0phtCrack exhausts the dictionary, it iterates through the word list again using a hybrid attack that adds combinations of a few characters to the beginning and end of each word prior to hashing. This attempt gleans any passwords that a user has created by simply appending random characters to a common word. Finally, L0phtcrack resorts to brute force to crack any remaining hashes, trying every possible combination of characters.

More information about : windows 2000 password crackers

Comments

Post a Comment

Popular posts from this blog

How to Change the Password on Microsoft Outlook

Microsoft Outlook is one of the most common business email clients. If you have recently begun work at a business that uses Microsoft Outlook, you may be wondering how to accomplish certain basic functions such as changing a password, as the menu option for doing so likely differs from the web mail account that you may be using at home. This article discusses the steps needed to change an email password in Microsoft Outlook. Step 1 Click "Tools" in Outlook, then click "Account Settings." Step 2 Click the "E-mail" tab if it is not already on top. Click the email account that you would like to change the password for, then click "Change." Step 3 Click inside the "Password" box, and type the new password for the email account. Click the "Remember password" box if you would like Outlook to remember your password. Step 4 Click the "More Settings" button if you a different password for your outgoing email serv
Read more

must-have tools for network working admins

  Networking tools for Windows are typically command-line programs or desktop applications. Under Windows 10, there’s a third format: apps that you download from the online Microsoft Store. Here we’re highlighting 10 networking tools that are available in the Microsoft Store and can be pinned as tile icons on the Windows 10 Start menu for convenient access. They’re all useful, and they’re all free. All My LAN lists your network's IP address, its profile name, and its maximum upload and download speeds. The amount of data that has been sent and received over the network is depicted in two line charts. By moving a slider, you can adjust the charts to represent the amount of data that was transmitted throughout the current day or up to the last 30 days. The charts can be combined to view as one chart. This app can also scan for any multicast DNS services or UPnP devices that are connected to your network. Clicking the name of a found device or service pulls up information about it, su
Read more

Common DNS Issues

  Running into an error with the Domain Name System — simply called a DNS error — means you won't be able to get access to the internet, which is frustrating if it happens regularly. Learning the most common causes of DNS issues and the best methods for fixing them can help you get back online with minimal effort. Essentially the DNS translates the domain names we use to access websites into IP addresses, which is what your computer actually uses to access the website. In most cases, a DNS problem is easy to fix Network Problems In many cases, an error attributed to DNS could be a simple connection problem (especially if you're connecting wirelessly using a laptop) that doesn't really relate to the DNS at all. Before blaming DNS errors, go to your "Network and Sharing Center" and run the troubleshooter. This will identify and fix many common connectivity issues and can help you narrow down the cause of the issue. Duplicate IP Addresses When two devices attempt to
Read more