WASM

Description

https://ctf.csclub.uwaterloo.ca/ctf-uploads/noob/wasm/chall.html

All the Colors of the Rainbow

The website shows nothing more than a simple message

Here check_flag() seems to refer to some JavaScript function

We can try running it in the Console tab with various arguments

Here we can learn a few things

• check_flag does not like any of the answers I gave and responds with a not answer

• check_flag takes in a string

After trying some more strings, I stopped to think about the hint a little more than the surface-level colours that were listed

Thinking about technologies blue, red, yellow, blue, green, red, there was a certain name that came to mind...

Windows.

But that didn't work. Eventually, I came to the actual solution

check_flag is quite picky...

Flag

uwctf{W45M_4772a105377592cd}