NetBIOS stands for Network Basic Input Output System. It allows your LAN
or WAN to share drives, folders, files and printers. Gaining access to a computer
through NetBIOS is very simple and easy. The only thing required is for the target
machine to have file and printer sharing enabled and to have port 139 open.
Below I will show you an example of what a hacker would do to gain access to a
Windows machine through NetBIOS.
1. First the hacker would search for a target. A common tool used by hackers
is Angry IP Scanner . Download and install it.
2. Next the hacker would insert the IP range he would like to scan. If the
hacker was connected to a WLAN (Wireless Local Area Network) he would
scan the local computers like I have shown below.