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Cracking Bcrypt Hashes
linux-security-exploitation-password-cracking | Level: Easy | Total Lab Runs: 0 | Premium Lab |
Bcrypt is a popular 184-bit password hashing function designed by Niels Provos and David Mazières in 1999. It is based on blowfish cipher. It is default password hashing algorithm for OpenBSD and other OSes like SUSE Linux.
An Bcrypt hash entry for a password is provided in digest.txt file. The password is either taken from the dictionary or generated using the password policy. The digest.txt file and the dictionary file "1000000-password-seclists.txt" are present in the user's home directory.
Objective: Recover the password
If the Dictionary attack fails then the password policy is:
- Password length is less than 6 characters i.e. 0 < length < 4
- Password can only contain characters from this character set: a-z, 0-9
The following activities are strictly prohibited on this website unless otherwise explicitly stated as allowed in the mission statement:
- Using automated scanners
- Using brute force attacks
- Denial of Service attacks
- Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
- Attacking the lab infrastructure
Users violating the above will be either temporarily or permanently banned from the website.
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