This paper attempts to provide the methods black hat hackers utilize ARP Spoofing to gain access to unauthorized machines, steal data and attack systems. This research includes theory and practical examples to carry out each of the attacks. In the attempt of figuring out how black hat hackers exploit system vulnerabilities and gain unauthorized access; the virtual machine Kali/Linux and some Python programming language will be used. The research delves into the following subjects; Mac Address, Network Scanner and ARP Spoofing