Note that by using the -O parameter optimized kernels , we will greatly increase the speed. But it will also limit the password length to 31 characters. From the above screenshot we can see that the average speed is around 1. Seems like cracking this hash with john is much faster in our case. This password type was introduced around and it is essentially a 1, iteration of MD5 hash with salt.
The salt is 4 characters long 32 bits. For modern computers this is not difficult enough and thus in many cases it can be successfully cracked. John the Ripper recognizes this password type as md5crypt.
To crack it, we have to again first convert it to the following john friendly format and save it in a file:. From the above screenshot we can see that the average speed is around thousand password attempts per second. To crack it, we can keep using the same john friendly format. Then we can crack it like this using a dictionary, for example:.
Much better than john in our case. This password type is a proper implementation of the failed password type 4. Essentially it is 20, iterations of SHA and this makes it much harder to crack in comparison with the previous password types. John the Ripper recognizes this password type as pbkdf2-hmac-sha From the above screenshot we can see that the average speed is around 1, password attempts per second.
Not much. From the above screenshot we can see that the average speed is around 11, password attempts per second. This password type uses Scrypt algorithm. This is due to the fact that Scrypt requires large amount of memory to perform its function.
John the Ripper recognizes this password type as scrypt. Note that we have to provide --force parameter since the hash-mode is marked as unstable for our particular device.
More Information On Cisco Passwords and Which can be Decoded Back in late , a non-Cisco source had released a program that was able to decrypt user passwords and other type of passwords in Cisco configuration files. Knowing what Can and Cannot be Decrypted It is important to understand that only the following type of passwords are able to be decrypted.
Thefollowing examples show which common areas Type 7 passwords are used in Cisco equipment: User Passwords Used to create users with different privilege levels on Cisco devices. Articles To Read Next:. Cisco Router 'Privileged' Mode. Cisco Router Password Recovery.
Cisco Router Modes. Introduction To Routers. Restrict S Cisco Router Basics. Cisco Router 'User Exec' Mode. The number '7' indicates that the password has been encrypted. The number that follows F41 is the encrypted version of the password. Cisco Type 7 Password Decryption. Cisco Type 7 Password Decryption Crack Cisco type 7 passwords: enable passwords: username passwords: Service password encryption is just a false sense of security.
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