CTFtime.org / UIUCTF 2020 / nookstop 2.0
注意ですけど、ほぼ解説できてないです。

Okay okay, they got back to me and they tell me that we're using some new technology. Can you give it a try now?
https://nookstop2.chal.uiuc.tf/
author: ian5v

nookstop1と同じことをまずはしてくれとあるので、nookstop1と同じようにまずはCookieを入れる。
すると、Accessボタンが出てくる。

Grabbing your banking information......
Your routing number is: 0x9a0 2464
Your account number has been successfully transmitted using the latest XOR encryption, and is not shown here for security reasons.
Please stand by while the ABD decrypts it.......

Calling decrypt function....
  wkwcwg{c3oo33os
Uh-oh! There's been an error!

なんか変なサイトとともに色々出てくる。