Decrypt Cisco Type 4, 5, 8 and 9 Passwords with John the Ripper and Hashcat

Paste any Cisco IOS "type 7" password string into the form below to retrieve the plaintext value. Type 7 passwords appears as follows in an IOS configuration file. Copy and paste only the portion bolded in the example.

password decrypt cisco

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Service password encryption will encrypt passwords. It will encrypt the enable password as well as encrypting all other clear text passwords on your router including the VTY, AUX, console and user passwords.

Sometimes it is possible that we forget the SFTP password or the CUCM Cluster Security Password or the Web Admin Password. In this case we can follow the below steps to recover the password without any need for the Server Restart. This was tested on CUCM version 9.1(1). I am not sure about the previous versions.

type 5 passwords are really hard to crack, especially since Cisco uses I think the 'salted' version of the hash. That said, if you are willing to dive into some dark hacker cracker stuff, here are two links to scripts you can use (I hope posting those links does not earn me jail time):

There is no decryption as the passwords are not encrypted but hashed. Although it's also a cryptographic operation, it's not a reversible encryption but a one-way function. All you can do is to take many different passwords, hash them and compare the result to your given hash-value. The used hash-algorithm with type 5 is salted md5 which can be computed lightning fast on modern computers. If you know that the original password is not too complex and long, it should be possible with the given tools.

The triviality in computing md5-based hashes (and also that there can be collisions) make md5-hashed passwords a bad thing and nowadays (at least in newer IOS) pbkdf2 or scrypt is often used. These are the password-types 8 and 9.

I guess it's not JUST an hash. Given a fixed password, what you see is different on every router. So it must be an hash, but adding some other randomness or local parameter, otherwise from a certain source input, the hash operation produces always the SAME output.

Here's a link and a quick summary of what "salting a hash" does: To mitigate the damage that a hash table or a dictionary attack could do, we salt the passwords. According to OWASP Guidelines, a salt is a value generated by a cryptographically secure function that is added to the input of hash functions to create unique hashes for every input, regardless of the input not being unique.

The Signature Tool is a Java utility which will allow you to encrypt clear-test passwords, decrypt encrypted passwords or strings and print the SSM_CSMP certificates in clear text. This tool should be used to generate encrypted password strings for your .csv files so that they do not contain administrator passwords in clear-text.

2.Execute the Signature Tool with the use of the decrypt option, and once again specify the exact path of the keystore file as well as the name of the .txt file which has the encrypted password stored in it.

Type 6 encryption uses AES which is a symmetrical encryption algorithm (as opposed to type 5 which uses a one-way hash), so in theory the passwords protected by type 6 encryption can be recovered if the master key is known.

Correct, there is no CLI to decrypt the password from the router itself (other than decryption that happens internally when the key is actually used). That's done intentionally for security reasons. See:

Sounds like I need to work with my SE to request this. There should be a way to decrypt these for administrator use if the master key is known. For instance, if you wanted to replace the device with something that does not support this feature at all and prevent coordinating a change with potentially dozens of customers.

I've often seen password decryption tools for the Cisco (type 7) passwords and wondered how they worked. To learn more about that and Perl I thought I'd give it a go :) The short story is it just seems to XOR each character against a value in an array. I'm sure its already clear but this will not work for md5 hashes like enable secret!

The tool will decrypt any type 7 (has a before it in the config) phrase e.g. local user passwords and enable passwords. It will also encrypt a string into a password compatible with Cisco devices (tested on 6500s and 3750s).

When dealing with a network device replacement project, the config of the existing device is received from the other party, but in general, the password information on the config is set to be encrypted, so the password information is unknown at first glance. It becomes.

For example, if you set a password with the username xxx password xxx command or enable password command, and then encrypt it with the service password-encryption command, you get a type 7 password.

So, if I enter the same password on the different ASAs the password hash will be the same. And if you decrypt one of them you will know the password for all systems. It's very strange. Moreover, Cisco Routers and Switches generate different password hashs. I understand that these devices use different ecryption algorithms.

(config)# username testuser1 password 12345(config)# username testuser2 password 12345(config)# username testuser3 password 12345(config)# username testuser4 password 12345(config)# username testuser5 password 12345

# sh run in username testuserusername testuser3 password oFJjANE3QKoA206w encryptedusername testuser2 password oFJjANE3QKoA206w encryptedusername testuser1 password oFJjANE3QKoA206w encryptedusername testuser5 password oFJjANE3QKoA206w encryptedusername testuser4 password oFJjANE3QKoA206w encrypted

Though, in ASA 8.3 there is a new feature (password encryption) that practically encrypts the passwords (commands key config-key password-encryption, password encryption aes) with a passphrase that can be changed on a per box basis, so you will not face this problem.

The ASA does salt the password but it uses the first 4 characters of the username to salt the password. In the example provided, the first 4 characters of all 5 usernames are all the same. Since first 4 are the same the resulting hash is the same. Had he used usernames that had unique first 4 characters, the resulting hash for the same password would have been different.

In this article, I would like to highlight the importance of using complex passwords when hashed with the MD5 128-bit algorithm. I will demonstrate the cracking of MD5 salted passwords using Kali Linux and a password cracking tool, John the Ripper.

Cisco IOS devices use the MD5 algorithm to hash username passwords created by administrators. When weak password strings are used that are protected with MD5 they become susceptible to attacks. MD5 passwords use something called salted hash, this is a four-character phrase that is generated and combined with the password.

Extracts of the following demonstration are taken from a CCNA Security lab I have been working on. It was such an informative lab, I decided to document it and share it with the SYNACK community. To carry out MD5 cracking we will use John the Ripper to crack a weak hashed password and then we will use a custom dictionary to carry out the second attack.

In this demonstration, you have seen how we can use John the Ripper to crack MD5 passwords. When using the enable secret command on Cisco IOS devices it is important to use complex passwords that are not based on any string of text and include letters, numbers and special characters.

Cisco Password Decryptor tool helps you to quickly recover Cisco Type 7 password.It supports dual mode of password recovery.You can either enter the encrypted Cisco Type 7 password directly or specify the Cisco configuration file. In second case, it will automatically detect the Type 7 password from config file and decrypt it instantly.

• Here are simple steps Run 'Cisco Password Decryptor' on your system after installation.

• Select 'Encrypted Password' option if you have the password else select 'Cisco Router Config File' if you have the Cisco configuration file.

• Next enter the password or configuration file path based on the previous option

• Finally click on 'Decrypt Password' button and tool will instantly display the decrypted password as shown in the screenshots below.

Screenshots Screenshot 1: Cisco Password Decryptor is showing the recovered Password from the encrypted Cisco Type 7 Password Screenshot 2: Showing Password recovered from the Cisco configuration file directly. Disclaimer 'Cisco Password Decryptor ' is designed with good intention to recover the Lost Router Password.

Like any other tool its use either good or bad, depends upon the user who uses it. However neither author nor SecurityXploded is in anyway responsible for damages or impact caused due to misuse of Cisco Password Decryptor . Read our complete 'License & Disclaimer' policy here. Release History Version 6.0: 21st June 2018 Mega 2018 release with improved cisco password recovery Version 5.0: 20th Jan 2017 Major 2017 release with fix to critical bug in Cisco password recovery. Version 4.0: 7th Dec 2016 Mega 2016 edition to support for recovering Cisco passwords on Windows 10. Also added new Installer Version 3.0: 30th Jul 2015 New feature added to Installer to dynamically download latest version. Version 2.5: 10th Jan 2015 Integrated Uninstaller into Windows Add/Remove Programs, now you can uninstall it in a standard way. Version 2.0: 2nd Apr 2014 Support for automatically copying the recovered password to clipboard on success. Improved GUI interface with magnifying icon effects. Version 1.5: 21st Apr 2013 Added Copy Button to quickly copy the decrypted password to clipboard Version 1.0: 5th Mar 2013 First public release of Cisco Password Decryptor . Download FREE Download Cisco Password Decryptor v6.0License : FreewarePlatform : Windows XP, 2003, Vista, Windows 7, Windows 8, Windows 10 2ff7e9595c