Crack level 5 passwords cisco

Note that since we have 4 CPU cores, we can run john in 4 instances using --fork parameter:. From the above screenshot we can see that the average speed is around Hashcat recognizes this password type as hash mode To crack it, we can keep using the same john friendly format Then we can crack it like this using a dictionary, for example:. 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.

Not much either. John the Ripper contains very useful ruleset for generating passwords called KoreLogic. This ruleset originated in DEFCON contest and it is a great way of generating passwords from patterns or when traditional dictionary attack fails.

Although there has been some efforts to convert the aforementioned KoreLogic rules into Hashcat, the result is only partial. Fortunately, we can chain together John the Ripper with Hashcat to make it use KoreLogic rules in full. Simply generate the passwords using John the Ripper on the stdout and feed them into Hashcat using pipe like this:.

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So whats the point of these type 7 passwords? The passwords in my config are in clear text? If you want to convert your config to display them as 7 you need to enter the service password-encryption command;. If Type 7 passwords are so weak, how do I use Type 5 passwords?

When creating accounts use the secret command like so;. Feed openssl the salt, and a piece of the hash see the example above , and it will run through, grep the wordlist until it finds a match, where it spits out the decrypted password an the original hash like so;. Note : The limitation here is the password has to be in the wordlist.