Hello, today I am going to show you how to crack passwords using a Kali Linux tools.Remember, almost all my tutorials are based on Kali Linux so be sure to install it.I am going to show you these :1. Cracking Linux User Password2.Cracking Password Protected ZIP/RAR Files3.Decrypting MD5 Hash4.Using Wordlists To Crack PasswordsLets begin.
I don't really recommend this one, but there are some peoples out there using this to crack...I will crack a hash that is inside a text file.I have a wordlist here, and I named it password.txt.To use the wordlist and crack the file, do :
No, not if you have a targeted list. I tested this on a password protected rar file i had someone create. I extracted the hash & ran john againt it. It ran for a solid 36 hours attempting a bruteforce in iteration mode. John never found it. Using a custom list I cracked the hash in 36 minutes.
Now to crack the password, John the Ripper will identify all potential passwords in a hashed format. It will then match the hashed passwords with the initial hashed password and try to find a match.
If a match is found in the password hash, John the Ripper then displays the password in raw form as the cracked password. The process of matching the password hashes to locate a match is known as a dictionary attack.
For example, the Linux command line zip utility uses the older PKZIP algorithm, which is insecure and easy to crack. Other programs, like WinZip and 7-Zip, use strong AES-256 encryption. Earlier versions of the RAR protocol use a proprietary encryption algorithm, while newer versions use AES. WinRAR and PeaZip, popular choices that can deal with RAR files, also use the AES standard.
Linux shadow files themselves are not encrypted, but the passwords contained within them are. Encryption algorithms used for these can vary depending on the system, but MD5, SHA-512, SHA-256, Blowfish, and DES are all commonly used.
Before we can run Zydra, we will need some files to test it out on. I have created a RAR file, ZIP file, and PDF file that you can download and use to follow along. The password for all three of these is \"password1\" as you'll soon find out. There is also a shadow file you can download, which I got from the Metasploitable virtual machine.
Zydra can operate in two modes: dictionary and brute force. In dictionary mode, we just need to supply a wordlist with the -d flag. We also need to specify the file we are trying to crack using the -f flag:
For brute force mode, we need to set a few more options. We still specify the file to crack, but now we can use the -b flag to set the character types to use for brute forcing. The minimum and maximum length of the password can also be set now, using the -m and -x flags, respectively:
Again, we can see it found the password, but this time there is an additional dialogue. This is simply telling us the file is a decrypted version of the original, which we can verify with the file command:
Zydra will automatically attempt to crack the password hashes for any users found in Linux shadow files. While it's not always successful, this can be a good method to try out first since it is quick and easy.
We can see it finds several users, but since we are only using a simple wordlist, it fails to find the password for any of them. Like any other cracking tool, using a more extensive wordlist will increase your chances of successfully recovering a password, but it will also take longer.
In this tutorial, we explored a tool called Zydra and how it can be used to crack password-protected RAR files, ZIP files, PDF files, and Linux shadow files. While we cracked these with little to no difficulty, using strong passwords will greatly increase the time and effort it takes to do so.
If you have lost your password of any zip, pdf, rar file, then here is an interesting tool for recovering passwords of the pdf file, zip, rar files. We use to save our crucial data in PDF, ZIP, RAR files as in encrypted format, but sometimes we forget the password and lost our data. Password encryption provides extra security for our files and data which is necessary for the present time, so that unknown person cannot read our files. Today you are going to know about a free Linux tool that can help you to recover the passwords of protected files.
Zydra is one of the easy and simple tools for file password recovery and it helps to crack the password of Linux shadow files. It contains a dictionary attack or the Brute force technique for recovering the passwords. This tool can recover passwords of these file types:
Like the previous method, we will use a custom word list for encryption. It can be a file of all passwords that you use generally but you have to forget the password of this file and you are lazy to type all the passwords, so this will you in this situation.
The final step would be to generate random passwords and use a password manager. There are a variety of options including the Chrome built-in Google password manager. If you use a strong password for each site you use, it becomes extremely hard to crack your password.
This article explains how to install unrar and rar command-line tools using official binary tar files under Linux systems to open, extract, uncompress or unrar an archive file.
To open/extract a RAR file with its original directory structure, just issue the below command with unrar x option. It will extract according to their folder structure see below the output of the command.
The unrar command is used to extract, list, or test archive files only. It has no option for creating RAR files under Linux. So, here we need to install RAR command-line utility to create archive files.
RarCrack uses the bruteforce algorithm to guess forgotten passwords of archive files. To install RarCrack on Ubuntu 12.04, just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below:
If you run fcrackzip without the -u option then it will throw a lot of possible passwords. When used with -u, it will try to decompress the file with those possible passwords, thus letting you know the exact one.
Zydra is a password recovery tool that can recover passwords from files and Linux shadow files using brute-force or dictionary attack. That means, it can crack passwords of ZIP, RAR and PDF files. Also it can recover passwords of Linux systems using the shadow file (shadow file stores user passwords in Linux system).
Here we have used the -f flag to specify the location of the ZIP file (in our case which is /home/kali/Desktop/images.zip) and using the -d flag we have specify the location of the dictionary (password list). Output shown in the following screenshot:
Note: Zydra can recover legacy ZIP files password (The standard one). We have created a ZIP file on Linux system (using Archive Manager) Zydra can't break it. But ZIP files created from Windows and internet works perfectly.
Then Zydra will start scanning the process. Here we have again choose 10k-most-common.txt password list inside our /usr/share/seclists/Passwords directory which is specified by -d flag and our target RAR file is specified by -f flag located on our Desktop.
We also can use bruteforce attack to recover the password. To do that we need to use -b flag in the place of -d flag and we should specify the type of password and length as we did on ZIP files section, an example command is following:
Linux's users password stored (encrypted) on the shadow file,located on /etc/shadow. Using Zydra we also able to crack shadow file's passwords. Zydra will crack the passwords one by one for every user on the system.
Either we can copy the shadow file from a system or we can run Zydra on the target system. Here for an example we run copied all the texts from shadow file from another system and saved it on our system (Desktop) in a file called shadow without file extension and try recover the password.
If we need to crack our own system's password then we need to use our root account (also may need to install rarfile pyfiglet py-term there). The command will be following(we need to log in as root, sudo command from non-root user may show error here):
This is created for educational perpose only we also can use it to recover forgotten password of files. But using Zydra against other's protected file will be considered crime as per law. So please do not use it to others without proper permission. We will not be responsible if anyone did this.
If you have made a RAR archvie a few years ago, and recently you want to unrar it but noticed that you've forgotten the password of it, what could you do I bet you are searching possible methods to break the password here and there. Have you found a way that how to crack WinRAR password successfully In this article, we will tell you whether it is possible to crack RAR password and how to do it.
It is a tough question asked by so many people. While googling, you may find that some people say that you can crack RAR/WinRAR password, others say that it is an impossible mission. Actually, there are several ways of cracking RAR password in this world with advanced technology. They vary in terms of efficiency and ease of use. You can check out the below options and choose one according to your current circumstances and needs.
The most effective and recommended method to unlock RAR password is using a professional RAR password breaker. Passper for RAR is absolutely what you need. This tool is rewarded as the fastest RAR password recovery tool in the market according to our test, which can check 10000 passwords every second. Moreover, with the intuitive interface, it is pretty easy to use. Only 2 steps needed, you can crack the password and open the locked RAR file effortlessly. Below are more outstanding features of Passper for RAR: 153554b96e