Cyber Apocalypse 2023

Persistence

Solved by Legend

Challenge description

Thousands of years ago, sending a GET request to /flag would grant immense power and wisdom. Now it’s broken and usually returns random data, but keep trying, and you might get lucky… Legends say it works once every 1000 tries.

In this challenge we are given IP along with Port Number to connect to the challenge and retrieve the flag using the GET request.

Initially checking the URL it gave something gibberish.

The hint of the challenge was that the /flag works once in 1000 tries. So I made a loop to do the same.

for i in `seq 1 1000`; do curl -s http://68.183.45.143:31981/flag | grep -i "HTB" ; done

And after running for sometime it gave the flag.