PicoCTF 2017 – What Is Web

Another day, another challenge.

In today’s blog post we are solving the challenge, “What Is Web” from the PicoCTF challenge.

Let’s start!

Clicking on the challenge we see:

OK, so we need to find out how to use HTML.

Looking at the hints we see:

Clicking on the website we see:

Doing a right click, view source we see:

At the bottom of the screen in the green letters (which are comments that are not displayed in the browser) show that we have the first part of the flag.

Now we need to find the second and third part of the flag.

Looking back at the page source we see two different files that are referenced: hacker.css and script.js

Let’s look at hacker.css first and see what’s there.

Going to that file we see the second part of the flag at the top of the browser:

Now let’s look at the script.js file and see if we can find the final part of the flag…

Going to the script.js file we see:

We now have the three parts of the flag!

Combining the parts together and submitting the flag, we’ve acquired 20 points!