Webmin passwordchange.cgi Backdoor Back to Search. Webmin passwordchange.cgi Backdoor Disclosed. This module exploits a backdoor in Webmin versions 1.890 through 1.920. Only the SourceForge downloads were backdoored, but they are listed as official downloads on the project's site. Jan 01, 2019 Blogger are highly recommended to change admin password periodically to secure the blog from the hackers. Hackers attempt brute force attack to crack down your admin password and can get access to your WordPress Dashboard. WordPress has makes it easy to change password using the email address you have used while installing WordPress.
What is Password Cracking?
Jun 24, 2020 Many Valuable Highlights of Password Genius. It works as a pro Word, Excel, PPT, ZIP, PDF, Outlook and RAR password unlocker. It can fast crack rar. Passwords without losing or corrupting it. Four recovery modes ('Brute-force', 'Mask', 'Dictionary' and 'Smart') allow you to quickly and accurately crack password from Excel and WinRAR, etc. Run the command openssl genrsa -out key.pem 2048. This will create the file key.pem which is your private key. Run the command openssl req -new -key key.pem -out req.pem. When it asks for the common name, be sure to enter the full hostname of your server as used in the URL, like www.yourserver.com.
Password cracking is the process of attempting to gain Unauthorized access to restricted systems using common passwords or algorithms that guess passwords. In other words, it’s an art of obtaining the correct password that gives access to a system protected by an authentication method.
![How to crack webmin password change How to crack webmin password change](/uploads/1/2/6/3/126392901/870492661.jpg)
Password cracking employs a number of techniques to achieve its goals. The cracking process can involve either comparing stored passwords against word list or use algorithms to generate passwords that match
In this Tutorial, we will introduce you to the common password cracking techniques and the countermeasures you can implement to protect systems against such attacks.
Topics covered in this tutorial
What is password strength?
Password strength is the measure of a password’s efficiency to resist password cracking attacks. The strength of a password is determined by;
- Length: the number of characters the password contains.
- Complexity: does it use a combination of letters, numbers, and symbol?
- Unpredictability: is it something that can be guessed easily by an attacker?
Let’s now look at a practical example. We will use three passwords namely
1. password
2. password1
3. #password1$
For this example, we will use the password strength indicator of Cpanel when creating passwords. The images below show the password strengths of each of the above-listed passwords.
Note: the password used is password the strength is 1, and it’s very weak.
Note: the password used is password1 the strength is 28, and it’s still weak.
Note: The password used is #password1$ the strength is 60 and it’s strong.
The higher the strength number, better the password.
Let’s suppose that we have to store our above passwords using md5 encryption. We will use an online md5 hash generator to convert our passwords into md5 hashes.
The table below shows the password hashes Password | MD5 Hash | Cpanel Strength Indicator |
---|---|---|
password | 5f4dcc3b5aa765d61d8327deb882cf99 | 1 |
password1 | 7c6a180b36896a0a8c02787eeafb0e4c | 28 |
#password1$ | 29e08fb7103c327d68327f23d8d9256c | 60 |
We will now use http://www.md5this.com/ to crack the above hashes. The images below show the password cracking results for the above passwords.
As you can see from the above results, we managed to crack the first and second passwords that had lower strength numbers. We didn’t manage to crack the third password which was longer, complex and unpredictable. It had a higher strength number.
Password cracking techniques
There are a number of techniques that can be used to crack passwords. We will describe the most commonly used ones below;
- Dictionary attack– This method involves the use of a wordlist to compare against user passwords.
- Brute force attack– This method is similar to the dictionary attack. Brute force attacks use algorithms that combine alpha-numeric characters and symbols to come up with passwords for the attack. For example, a password of the value “password” can also be tried as p@$$word using the brute force attack.
- Rainbow table attack– This method uses pre-computed hashes. Let’s assume that we have a database which stores passwords as md5 hashes. We can create another database that has md5 hashes of commonly used passwords. We can then compare the password hash we have against the stored hashes in the database. If a match is found, then we have the password.
- Guess– As the name suggests, this method involves guessing. Passwords such as qwerty, password, admin, etc. are commonly used or set as default passwords. If they have not been changed or if the user is careless when selecting passwords, then they can be easily compromised.
- Spidering– Most organizations use passwords that contain company information. This information can be found on company websites, social media such as facebook, twitter, etc. Spidering gathers information from these sources to come up with word lists. The word list is then used to perform dictionary and brute force attacks.
Spidering sample dictionary attack wordlist
Password cracking tool
These are software programs that are used to crack user passwords. We already looked at a similar tool in the above example on password strengths. The website www.md5this.com uses a rainbow table to crack passwords. We will now look at some of the commonly used tools
John the Ripper
John the Ripper uses the command prompt to crack passwords. This makes it suitable for advanced users who are comfortable working with commands. It uses to wordlist to crack passwords. The program is free, but the word list has to be bought. It has free alternative word lists that you can use. Visit the product website https://www.openwall.com/john/ for more information and how to use it.
Cain & Abel
Cain & Abel runs on windows. It is used to recover passwords for user accounts, recovery of Microsoft Access passwords; networking sniffing, etc. Unlike John the Ripper, Cain & Abel uses a graphic user interface. It is very common among newbies and script kiddies because of its simplicity of use. Visit the product website http://www.softpedia.com/get/Security/Decrypting-Decoding/Cain-and-Abel.shtml for more information and how to use it.
Ophcrack
Ophcrack is a cross-platform Windows password cracker that uses rainbow tables to crack passwords. It runs on Windows, Linux and Mac OS. It also has a module for brute force attacks among other features. Visit the product website http://ophcrack.sourceforge.net/ for more information and how to use it.
Password Cracking Counter Measures
- An organization can use the following methods to reduce the chances of the passwords been cracked
- Avoid short and easily predicable passwords
- Avoid using passwords with predictable patterns such as 11552266.
- Passwords stored in the database must always be encrypted. For md5 encryptions, its better to salt the password hashes before storing them. Salting involves adding some word to the provided password before creating the hash.
- Most registration systems have password strength indicators, organizations must adopt policies that favor high password strength numbers.
Hacking Activity: Hack Now!
In this practical scenario, we are going to crack Windows account with a simple password. Windows uses NTLM hashes to encrypt passwords. We will use the NTLM cracker tool in Cain and Abel to do that.
Cain and Abel cracker can be used to crack passwords using;
- Dictionary attack
- Brute force
- Cryptanalysis
We will use the dictionary attack in this example. You will need to download the dictionary attack wordlist here 10k-Most-Common.zip
For this demonstration, we have created an account called Accounts with the password qwerty on Windows 7.
Password cracking steps
- Open Cain and Abel, you will get the following main screen
- Make sure the cracker tab is selected as shown above
- Click on the Add button on the toolbar.
- The following dialog window will appear
- The local user accounts will be displayed as follows. Note the results shown will be of the user accounts on your local machine.
- Right click on the account you want to crack. For this tutorial, we will use Accounts as the user account.
- The following screen will appear
- Right click on the dictionary section and select Add to list menu as shown above
- Browse to the 10k most common.txt file that you just downloaded
- Click on start button
- If the user used a simple password like qwerty, then you should be able to get the following results.
- Note: the time taken to crack the password depends on the password strength, complexity and processing power of your machine.
- If the password is not cracked using a dictionary attack, you can try brute force or cryptanalysis attacks.
Summary
- Password cracking is the art of recovering stored or transmitted passwords.
- Password strength is determined by the length, complexity, and unpredictability of a password value.
- Common password techniques include dictionary attacks, brute force, rainbow tables, spidering and cracking.
- Password cracking tools simplify the process of cracking passwords.
Password is a very important security feature that lets you protect your important files from unauthorized users. If you have multiple accounts on your computer, then your administrator account will be the main account. To stop unauthorized users from gaining access to your important files, you would have likely set up a password to your administrator account. But what happens when you forget your administrator account password. You get a computer in which you can't go to the desktop or access your files. When you want to crack administrator password, then you will need the tricks to crack your administrator account password so that you can get access to your computer.
Part 1. How to Crack Administrator Password Using CMD
CMD or command prompt is an administrative tool in the Windows operating system. The command prompt is a command line tool that looks like MS-DOS and thus can be difficult to use for beginners. You can use various commands and utilities in command prompt to fix various system errors and issues. So it is no wonder that it can help crack administrator password. What you need for operating CMD is a little bit of skill and knowledge of the right commands.
Command prompt not really shows you the old password, instead lets you reset the password. As without password you can’t login to your account, you have to launch the CMD from another guest account if your PC has any or a Windows recovery disk. After that follow the steps below to use CMD to crack Administrator password.
Easy Steps to Use CMD to Crack Administrator Password
Step 1: Launch the CMD from Windows recovery disk or the other admin account.
Step 2: Type in the 'net user' command. It will show you all the accounts on your PC.
Step 3: See the admin account whose password you want to crack.
Step 4: Then type the following command - net user Username newpassword, where username is the admin account whose password you want to change and newpassword is the new password that you want. Here Username is 'BAM' and password is 'imbam'.
Step 5: Press 'Enter' and the password will be changed to whatever you had selected in the previous command.
Step 6: Restart the computer and log in with your new administrator password.
Part 2. How to Crack Administrator Password on Windows 10/8/7/XP Using Third-party Software
If you don't have another admin account on your PC or don't have the windows recovery disc, even then you can crack administrator password. Various third-party password recovery software online lets you do the deed. Windows Password Mate is one such software that lets you recover your admin account if you ever forget your password. Using Windows password Mate is very easy to use and you don't need any technical skills to recover your account password. Moreover, it can be used on all popular window type like XP/7/8/10 and recover admin and local user account password.
Follow the Steps to Use Windows Password Mate to Crack Administrator Password
Step 1: First you have to download and install the Windows Password Mate on an alternative PC and launch the program.
Step 2: Then, insert a USB flash drive and Click on Burn USB to create a bootable USB. You can use this bootable USB to crack your administrator password.
Step 3: Switch to your computer and change the default boot order to USB through quick boot menu or through the BIOS.
Step 4: Insert the bootable USB into the USB ports and the password recovery program will automatically load up.
Step 5: Choose your target operating system and select the username of the admin account whose password you want to crack.
Step 6: Finally click 'reset password' button and then 'Reboot'.
Part 3. How to Crack Administrator Password Without Software
How To Crack Webmin Password Windows 10
Windows has a safety feature beforehand to reset the forgotten password if you have the need to do so anytime. This is the password reset disk that is created from Windows and is usually a USB flash drive. This password reset disk will come in very handy when you want to crack administrator password without CMD or third-party software. But that is if you had created the password reset disk beforehand you were locked out of your PC. If everything is according to plan, then follow the below steps to reset the forgotten password of your administrator account.
Steps to Crack Administrator Password Without Software
Step 1: Start your computer and enter any wrong password into the input box at the login screen.
Step 2: When the login failed dialog box appears, Click on 'Reset Password'.
Step 3: You will be shown a Welcome to Password reset wizard dialog box. Click 'Next' on this screen.
Step 4: The insert the password reset disk and choose the following drive, followed by a 'Next'.
Step 5: Then a Reset the User account password screen will be displayed. Type the New Password twice in the corresponding input boxes.
Step 6: If you want, you can even create a password hint and finally click 'Next'. At last, Click 'Finish' and the password reset wizard is completed.
Step 8: Now you can log in to your administrator account with the new password.