Today we’re going to work on a challenge from Vulnhub called JIS-CTF.

Blockchain challenge

I got this challenge from my friend Yodak, with simple instruction - become a millionaire. At first we are presented with a webpage containing 2 forms - register and login. - cmd2

Start by connecting to the server, with the password from the previous challenge.

Protostar - Stack 03

Let’s start by looking at the source code of the challenge.

Protostar - Stack 02

Let’s take a look at the code of this challenge.