README.md

where are the robots

Write-up author : jon-brandy

DESCRIPTION:

Can you find the robots? https://jupiter.challenges.picoctf.org/problem/60915/ or http://jupiter.challenges.picoctf.org:60915

HINTS:

What part of the website could tell you where the creator doesn't want you to look?

STEPS:

1. We can try to check hidden file(s) inside the website using tools that are similiar to dirbuster and gobuster. It is called DIRB.
2. Try to run the command dirb https://jupiter.challenges.picoctf.org/problem/60915/ -X .txt. -X means extension, so basically from the command means we want to check are there any file(s) hidden in this website that has the .txt extension.
3. Then click enter.
4. This might be took a few minutes.
5. Finally we got this output:

6. From the output we got information, that there is a robots.txt file inside the website.
7. Try to change the url to https://jupiter.challenges.picoctf.org/problem/60915/robots.txt.
8. Then the page changed to this:

9. The last step, try to change the url using the Disallow mentioned. /8028f.html -> https://jupiter.challenges.picoctf.org/problem/60915/8028f.html
10. Finally, we can see the flag.

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FLAG:

picoCTF{ca1cu1at1ng_Mach1n3s_8028f}