http://natas2.natas.labs.overthewire.org
Username: natas2
Password: (natas2_password)

Once you log in, you’ll see a message saying there’s nothing on this page. Use Ctrl + U to view the source page.

In the source code, we noticed a directory called files that stores a file named pixel.png

So, we tried accessing it through the web browser.

Now we see a file named users.txt, so we clicked on it.

You’ll find the flag once you open it.

Boom! Flag secured — get ready for the next challenge.