4G Wireless Cards

Hello guys I have a theoretical situation. John was on a 3 week cruise for vacation along with some coworkers. John doesn't like his coworkers and one of them happens to have a brand new 4g wireless USB card for his laptop. Not only his John good at hacking but his social engineering skills a great too. But John needs some malware that will give him control over the Wlan. His co-worker is running windows 7.

What kind of malware is out there that would allow me to accomplish this? or would I need to write on myself. I have basic knowledge in metasploit and nmap but in the situation we're not connected to the same Lan. Any ideas?