Challenge Name: Where are the robots
Points: 100
Category: Web Exploitation
Hello Everyone,
I hope you are doing well.
Please note that, this CTF competition is over so I have rights to post the writeup publicly according to the policy.
I hope that you have tried all the possible ways to solve the challenge and you are here because you have still not found the solution.
Flag Format: picoCTF{FLAG}
Challenge Details:

Hints: What part of the website could tell you where the creator doesn’t want you to look?
Solution:
From the challenge name itself we are getting hint that we need to look into robots.txt file.
So, visit https://jupiter.challenges.picoctf.org/problem/36474/
and append the URL with robots.txt
Now the final URL becomes, https://jupiter.challenges.picoctf.org/problem/36474/
robots.txt
Here, we can see
User-agent: *
Disallow: /477ce.html
Now append /477ce.html to our first URL.
So the URL looks something like this.
https://jupiter.challenges.picoctf.org/problem/36474/477ce.html
after visiting this URL, you’ll get the flag.
Flag: picoCTF{ca1cu1at1ng_Mach1n3s_477ce}
I hope that you have enjoyed the writeup and learned something new today, Please let me know if there are any concerns.
Thank You
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