What is John the Ripper?

John the Ripper – Cracking passwords and hashes
John the Ripper is the good old password cracker that uses wordlists/dictionary to crack a given hash. Can crack many different types of hashes including MD5, SHA etc. It has free as well as paid password lists available. It is cross platform.

John the Ripper is a free and fast password cracking software tool. Initially developed for the Unix operating system, it now runs on fifteen different platforms (eleven of which are architecture-specific versions of Unix, DOS, Win32, BeOS, and OpenVMS). Its primary purpose is to detect weak Unix passwords. Besides several crypt(3) password hash types most commonly found on various Unix systems.

Attack types

One of the modes John can use is the dictionary attack. It takes text string samples (usually from a file, called a wordlist, containing words found in a dictionary or real passwords cracked before), encrypting it in the same format as the password being examined (including both the encryption algorithm and key), and comparing the output to the encrypted string. It can also perform a variety of alterations to the dictionary words and try these. Many of these alterations are also used in John’s single attack mode, which modifies an associated plaintext (such as a username with an encrypted password) and checks the variations against the hashes.

John also offers a brute force mode. In this type of attack, the program goes through all the possible plain texts, hashing each one and then comparing it to the input hash. John uses character frequency tables to try plaintexts containing more frequently used characters first. This method is useful for cracking passwords which do not appear in dictionary wordlists, but it takes a long time to run.

Requirements 
1. Parrot OS Installed Pc (You Can Run Also Live Mode)
2. Now Available For Other OS Click Here
3. Some Knowledge About Parrot (Not Higher Requirement Follow My Steps Only)
4. Some Patience.

Steps

1. Go To Terminal Command Window And Type john –format=raw-md5 yourfile.txt Hit Enter.
Press Any Key On Keyboard Excluding Q And C.
2. Wait for 10 Minutes For process Log Press Enter.
3. It’s For MD5 Hash Passwords.

4.Now How To Crack Zip Pass.
5.So Type zip2john Yourfile.zip>Yourfile.txt HIT Enter
6.Now We created Zip’s Hash Pass in Txt Format.
7.Then Type john –format=zip Yourfile.txt Hit Enter. Wait For 10 Min.
8.Now You Will Se Your Zip’s Pass On Terminal.

Now Its there we got.

For Queries contact : admin@ethicalhackers.in

Uses
1. We Can Crack All Md5 Password.
2. We Can Crack All Zips, Rar Passwords.
3. We Can Crack Hashcat Files.
4. All Types Of Passwords We Crack With JTR (John The Ripper)

John the Ripper

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