Welcome to ZUMBOCOM….you can do anything at ZUMBOCOM.
Three flags await. Can you find them?
http://zumbo-8ac445b1.ctf.bsidessf.net
Stages 2 and 3 - coming soon!

This was a Web challenge and the link led to a page with no links. I inspected the webpage, and saw that it had Server.py which seemed like an odd thing to place there.

inspect zumbo1

I changed the directory of the website to http://zumbo-8ac445b1.ctf.bsidessf.net/server.py which revealed the source code for server.py and the flag for part 1. I formatted the code so it looked nicer.

server.py code

FLAG:FIRST_FLAG_WASNT_HARD