beSTORM is using a special Wifi Dongle which connects to your Windows endpoint and it's used to inject Wifi Packets.
Unfouratnetly built-in network cards are not capable of fuzzing Wifi equipment such as Access Point, therefore we recommend you the use of a dongle provided by Beyond Security.

In order to fuzz you will need to have WinPcap running. 

beSTORM will send traffic over the air spoofing the AP, the DUT will receive the packets as if  it was received from the AP.