- John The Ripper Crack Sha512 Encryption Pdf
- John The Ripper Crack Sha512 Encryption Tool
- John The Ripper Crack Sha512 Encryption Failed
Summary of Results
JOHN THE RIPPER Linux password: $./john pass.txt Loaded 1 password hash (sha512crypt, crypt(3) $6$ SHA512 64/64 OpenSSL) Will run 4 OpenMP threads Press ’q’ or Ctrl-C to abort, almost any other key for status 0g 0:00:00:03 2/3 0g/s 1771p/s 1771c/s 1771C/s Sandy.Mayday Session aborted 27. I've been playing with John The Ripper (JtR) to try to crack/audit a salted password that was hashed with SHA-512, with 20 interactions according to the source (for the curious, this is a Rails app, with the authlogic gem). If I understood things correctly, JtR expects its hashes in a file, where each hash follows certain format.
| Type of Hash | Cracking Performance for 4 Hashes | Instructions |
|---|---|---|
| Windows 7 | 1.3 sec. with dictionary of 500,000 words | Instructions |
| Linux | 20 sec. with dictionary of 500 words | Instructions |
| Wordpress | 4 min. with dictionary of 500,000 words | Instructions |
| Joomla | 1.1 sec. with dictionary of 500,000 words | Instructions |
Hash Types
Windows hashes are one round of MD4 with no salt.Wordpress hashes are now $P$B type phpass: 8193 iterations of MD5, with salt
John The Ripper Crack Sha512 Encryption Pdf
Drupal 7 hashes are $S$C type phpass: 16385 interations of SHA-512, with salt. They are even more secure than Linux hashes,as shown below.
Linux passwords are 5000 rounds of SHA-512, with salt.
Comparing Drupal 7 and Linux Hashes
I was able to test Drupal 7 and Linux hashes withJohn the Ripper and the list of 500 passwords.
As shown below, john took 3.6 seconds to crackLinux hashes, but 39 seconds to crack Drupal 7passwords. This verifies that Drupal 7passwords are even more secure than Linux passwords.
John Cracking Linux Hashes
John Cracking Drupal 7 Hashes
Joomla
Joomla Security ExtensionsI decided to write up some Hashcat projects for my students:The results were impressive and easy to understand.
By default, Kali Linux uses Type 6 Crypt password hashes--salted, with 5000 rounds of SHA512.
It takes 20 seconds to crack four hashes like that,using a dictionary of only 500 words (a very smalldictionary).
Windows 7, however, uses NT hashes--no salt, one round ofMD4.
It takes 1.3 seconds to crack four NT hashes,using a dictionary of 500,000 words.
So Windows hashes are more than 10,000 times weakerthan Linux hashes.
Posted 1:56 PM 6-16-13 by Sam Bowne
Added Wordpress and Joomla Hashes 11:40 am 6-19-13
Added Joomla Security Extensions 3:53 PM 6-19-13
Linux instructions link fixed 4:30 PM 6-19-13
Drupal information added 4:28 PM 6-20-13
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:
Student 2’s haul:
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.
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.
John The Ripper Crack Sha512 Encryption Tool
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.
John The Ripper Crack Sha512 Encryption Failed
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.