I think there may also be a 'fat' salted sha512 format (not 100% sure). I do know that with dynamic, getting hashes like this where there is no 'real' format is pretty easy to do now. With the new on-commandline dynamic, you do not even need to write a script any more. Jun 09, 2018 John the Ripper can crack the PuTTY private key which is created in RSA Encryption. To test the cracking of the private key, first, we will have to create a set of new private keys. To do this we will use a utility that comes with PuTTY, called “PuTTY Key Generator”. Click on “Generate”. The encryption algorithm of encrypted Microsoft Excel files is 40bit RC4. As it is encrypted nothing could be tweaked by opening the document with a hex editor. The correct way is to extract the password hash from the file and then cracking it using John The Ripper. Mar 29, 2020. John.exe Cracking Passwords. John the Ripper’s primary modes to crack passwords are single crack mode, wordlist mode, and incremental. The single crack mode is the fastest and best mode if you have a full password file to crack. Wordlist mode compares the hash to a known list of potential password matches. Jun 05, 2018 John the Ripper Wordlist Crack Mode. In this mode John the ripper uses a wordlist that can also be called a Dictionary and it compares the hashes of the words present in the Dictionary with the password hash. We can use any desired wordlist. John also comes in build with a password.lst which contains most of the common passwords.
Each time I teach my Security class, I give a month-long lab to crack as many passwords as possible. For this fall’s contest (opened on October 7, 2018), I used three different hash types: NTLM, MD5, and SHA-512. The password hashes (16 total):
65 total submissions. The answers:
- (MD5) yogibear:L1verpool! => 11 students cracked this
- (MD5) bigbear:unbelievable => 60 students cracked this
- (MD5) grizzlybear:zxcasdqwe123 => 56 students cracked this
- (MD5) pandabear:vulmjz => 7 students cracked this
- (MD5) yolandabear:kx7yy4 => 5 students cracked this
- (MD5) fancybear:sx708n => 7 students cracked this
- (MD5) jojobear:wmOhL3u4J => 0 students cracked this
- (SHA512) smokeybear:asdf => 60 students cracked this
- (SHA512) cocobear:meatball => 60 students cracked this
- (SHA512) yetibear:06mulesystems => 8 students cracked this
- (SHA512) blackbear:mzpixl => 3 students cracked this
- (SHA512) fozziebear:320299 => 18 students cracked this
- (SHA512) pedrobear:R6iLFUgG => 0 students cracked this
- (NTLM) cozybear:doofus => 62 students cracked this
- (NTLM) chicagobear:ihateyou => 62 students cracked this
- (NTLM) teddybear:w7zbyt => 45 students cracked this
To earn all 10 points for the lab, students had to crack 6 passwords. The final distribution:
The winners (tied) cracked 14 of the 16 passwords.
Student 1’s haul and methodology:
![Sha512 decrypt Sha512 decrypt](/uploads/1/1/8/2/118237512/927816812.png)
Student 2’s haul:
![Ripper Ripper](/uploads/1/1/8/2/118237512/796302590.png)
Student 2’s methodology:
To crack the majority of the passwords I’ve completed so far, I used John the Ripper and Hashcat. I began by using a series of wordlists on both the MD5 and SHA512 passwords, which I divided into two separate files consisting of only passwords hashed with the respective algorithms. To this point, I’ve used a scattering of the wordlists from the
Seclists/Leaked-Databases
folder, and have had the most success with rockyou.txt
. Using rockyou.txt
, I cracked two of the MD5 hashes and three of the SHA512 hashes.John The Ripper Crack Sha512 Encryption Failed
I then applied a series of different rules to some of these wordlists, for both MD5 and SHA512 hashed passwords. For the SHA512 passwords, I have been using my computer at home (with a decent graphics card) to speed up the process. Using these rules, and Hashcat which I’ve found to be a better option for GPU cracking, I cracked another of the MD5 hashed passwords.
After using a number of wordlists with a collection of different rules, I turned to brute force incremental cracking, as well as Hashcat’s mask attack. Using these two brute force methods, I’ve cracked another three MD5 hashes, and one SHA512 hash.
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John The Ripper Crack Sha512 Encryption Windows 10
For the NTLM passwords, I ran JtR (John the Ripper) with the default settings to crack two of the hashes. I considered using wordlists with rules to crack the remaining NTLM password, but ended up using a site (hashkiller.co.uk/ntlm-decrypter.aspx) with a huge number of computed NTLM hashes (since I noticed that these hashes weren’t salted) to crack this one.