This is a revered social engineering tool with immense power. It complements almost every aspect of social engineering. It is composed of tools that a social engineer can use every step of the way during an attack. SET brings all manners of automation to a social engineering attack making everything a lot simpler for the human. The toolkit however, seen more uses by white hats in their penetration testing exercises. This does not, however, dismiss the tool as a threat. It can still be used against organizations with high chances of success. It all depends on who wields the tool.
This tool comes preinstalled in Kali. However, it can still be installed on other Linux operating systems but it will need Metasploit ...