• This task is very trivial and the most important hint is given in the CTF’s name : robots.

• All we have to do is to navigate to /robots.txt to reveal the flag.

User-agent: *
Disallow: /g00d_old_mus1c.php

• We see that the g00d_old_mus1c.php is not crawlable, but we have access to that page.

The flag is CTF{Kr4{REDACTED}0ts}