What is netbios? NetBIOS is a service that provides network connectivity and is often used to join a domain and legacy applications. This is a rather old technology, but it is still used in some software environments. And since this is an unprotected protocol, quite often it can be the starting point for an attack on a network. A good start would be to scan NetBIOS shares using the NBTScan and Nmap Script Engine.

To accomplish this task, we will use our target machine as Metasploitable 2– a virtual machine with vulnerabilities intentionally created in it. We will attack it with Kali Linux, a distribution for hackers and pentesters.
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