The enable password command uses the weaker type 7 encryption, whereas the enable secret command uses the stronger type 5 encryption. Cisco also has the service password-encryption command. 5 minute read How to install Metasploitable3 with Vagrant on macOS. Hacking WPS Using Reaver and Pixie Dust Attack. Cracking Cisco ‘Type 5’ Passwords 2 minute read How to crack cisco type 5 passwords with Python. Updating the Proxmark3 on OSX 3 minute read. '5' means that the clear password has been converted to cisco password type 5. Type 5 password is a MD5 based algorithm (but I can't tell you how to compute it, sorry). Type 7 that is used when you do a 'enable password' is a well know reversible algorithm. 'service password-encryption' just ensure that password will not be stored in clear (type 0). Javascript tool to convert Cisco type 5 encrypted passwords into plain text so that you can read them. This is done using client side javascript and no information is transmitted over the Internet or to IFM. The type 5 passwords are protected by MD5 and as far as I know there is not any way to break them. Depending on what type of password it is, you can probably use the password recovery procedure and replace the password with a new password. But I do not think that you can break the existing password. 5.1.2.4 Lab – Password Cracking Answers Lab – Password Cracking (Answers Version) Answers Note: Red font color or gray highlights indicate text that appears in the Answers copy only. Objectives Use a password cracking tool to recover a user’s password. Background / Scenario There are four user accounts, Alice, Bob, Eve, and Eric, on a Continue reading.
In this tutorial we will show you how to create a list of MD5 password hashes and crack them using hashcat.
We will perform a dictionary attack using the rockyou wordlist on a Kali Linux box.
Creating a list of MD5 hashes to crack
To create a list of MD5 hashes, we can use of md5sum command.
The full command we want to use is:
Here we are piping a password to md5sum so a hash is produced. Unnecessary output is then stripped and it is stored in a file in a file called 'hashes'.
'echo -n 'Password1' is used to print the phrase 'Password1'. The -n portion removes the new line added to the end of 'Password1'. This is important as we don't want the new line characters to be hashed with our password.
The part “tr –d ‘ -‘ “ removes any characters that are a space or hyphen from the output like so:
Before:
After:
For demonstration purposes, we'll create multiple MD5 hashes containing different strength passwords and output them to a file called hashes:
Once you have run these commands will look something like this:
If you already have a list of words then the following bash script can be used to automate the MD5 generation, reading each line in a file, then generating a file off the resulting hashes. Replace 'wordlist' with the file path of your word list.
If you do not have md5sum on your machine, you can copy and paste the hashes above and save it in a file called 'hashes'. If you want to hash different passwords than the ones above and you don't have md5sum installed, you can use MD5 generators online such as this one by Sunny Walker. /stronghold-crusader-license-key-free.html.
Running hashcat to Crack MD5 Hashes
Brute Forcing Passwords Tool
Now we can start using hashcat with the rockyou wordlist to crack the MD5 hashes. The rockyou wordlist comes pre-installed with Kali. If you are not using Kali you can use another wordlist, or download it from here.
Cisco Password Decrypt
The command to start our dictionary attack on the hashes is:
| Argument | Function |
| -m 0 | Tells hashcat which mode to use. 0 is MD5. |
| Hashes | Our file containing the our MD5 password hashes. |
| /usr/share/wordlists/rockyou.txt | Points hashcat to the wordlist containing the passwords to hash and compare. |
When you run the command, you should get an output like below:
Towards the top of the output you can see the hashes that were cracked side-by-side with the plaintext password and hash.
From the output we can determine the following passwords we hashed were not in the rockyou wordlist:
- GuessMe3
- S3CuReP455Word
- HighlyUnlik3lyToB3Cr4ck3d
Unless told otherwise, any hash that hashcat cracks will be stored in a hashcat.pot file. This will be created in directory where you ran hashcat.
The contents of your 'hashcat.pot' file from this tutorial should look like the following:
Crack Cisco Ios Password 5
Summary
This has been a basic tutorial on how to crack MD5 hashes using hashcat. We've MD5 hashed passwords and using hashcat, cracked five out of the total eight. The attack technique that we used within hashcat was a dictionary attack with the rockyou wordlist.