"cshacked.pl" seems to be a Perl script designed to test the security of a Unix-like system's shell, particularly csh (C shell) or its variants. The script attempts to exploit known vulnerabilities in the shell or its configuration.
If you're interested in testing system security or vulnerabilities, you may want to explore more comprehensive and widely-maintained tools like: cshacked.pl
But the prompt remained changed. It wasn't the standard bash shell anymore. It was CSHACKED> . "cshacked