Create a Trojan Horse That Spreads to Other Pc via Ethernet

I will need to create a trojan that spreads to other pc via ethernet just by infecting a pc with a usb key. To better explain: I insert my usb key into a computer (Windows 7) the pc is now infected without need to do anything I remove my usb stick and I go home and I look on another pc (no relationship with others) infected pc. remote I would like to access files, ...

So the victims are on windows 7 and I the attacker on kali linux

Thank you for telling me exactly how to do it,

Thank you so much.