I will solve the You Cant C Me challenge from HackTheBox

let’s download the binary and run file against it!

it’s a normal 64-bit ELF nothing special there!

now lets run it!

Notice please that we need to enter a input there!

let’s decompile the binary using ghidra!

Please notice that our input is compared using strcmp!

that mean if we are able to debug the application we will see the plaintext password!

so we will use ltrace for that

ltrace ./auth

Please notice that the string that is getting compared to out input showed in plaintext!