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In this video we will revisit the license check program from last time. You can get the same compiled 64bit binary from github and you can also watch the last video where I went into more detail how to crack this simple program. I will show now different simple tools and techniques that exist to analyse a program like that to circumvent the license check. This should show you that there are a variety of different ways how to solve this challenge. The file command is very useful to check what kind of files you have. So file on our binary says its a ELF 64-bit executable for Linux. You can also do file * to get the information on all files in the directory. And it then also finds the C source code here. So thats very useful. Lets open the program in a text editor like vim. As you can see it looks very weird. I have introduced ASCII before, so you know that every character has assigned a number. But there are numbers that dont have a printable character assigned. If you look at t
