NetHunter has a feature that allows us to turn our device and OTG cable to behave as a keyboard and hence type any given commands on any connected PC. This allows us to perform HID attacks.
"HID (human interface device) attack vector is a remarkable combination of customized
hardware and restriction bypass via keyboard emulation. So, when we insert the device,
it will be detected as a keyboard, and using the microprocessor and onboard flash
memory storage, you can send a very fast set of keystrokes to the target's machine
and completely compromise it."
– https://www.safaribooksonline.com/library/view/metasploit/9781593272883/
– https://www.safaribooksonline.com/library/view/metasploit/9781593272883/