my_windows2008_ssh.json

{
  "builders": [{
    "type": "amazon-ebs",
    "region": "us-east-1",
    "vpc_id": "",
    "subnet_id": "",
    "source_ami": "ami-12345678",
    "instance_type": "t2.large",
    "ami_name": "my-windows2008-ssh",
    "communicator": "ssh",
    "ssh_disable_agent" :true,
    "ssh_username": "Administrator",
    "ssh_timeout": "15m"
    }],
  "provisioners": [
    {
      "type": "windows-shell",
      "inline": "hostname"
    }
  ]
}