sucrack

sucrack is a multithreaded Linux/UNIX tool for brute-force cracking local user accounts via su. This tool comes in handy as final instance on a system where you have not to many privileges but you are in the wheel group. Many su implementations require a pseudo terminal to be attached in order to take the password from the user. This is why you couldn't just use a simple shell script to do this work. This tool, written in c, is highly efficient and can attempt multiple logins at the same time. Please be advised that using this tool will take a lot of the CPU performance and fill up the logs quite quickly.

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