Flag: kossCTF{mugi_chan_is_veryyy_rich}
Author: subzcuber
Description:
Can you figure out the favourite snack of our K-On girls?
It was a crazy experience seeing so many people play K-On songs in a large Nalanda classroom. Thank you everyone.
From the webpage and the description you were supposed to figure out that their favourite snack is “Cookies”. This is a sign to go look at the cookies with your browser tools.
You should see this “sus” cookie
The value it stores is
a29zc0NURnttdWdpX2NoYW5faXNfdmVyeXl5X3JpY2h9==The “==” is a dead giveaway that this is base64 encoded. So let’s decode that
❯ echo -n "a29zc0NURnttdWdpX2NoYW5faXNfdmVyeXl5X3JpY2h9" | base64 -d
kossCTF{mugi_chan_is_veryyy_rich}You could also just go into the script.js and see the line that set the cookie.
document.cookie = "sus=a29zc0NURnttdWdpX2NoYW5faXNfdmVyeXl5X3JpY2h9==; path=/;";