packer.json

{
    "variables": {
        "aws_access_key": "{{env `AWS_ACCESS_KEY_ID`}}",
        "aws_secret_key": "{{env `AWS_SECRET_ACCESS_KEY`}}",
        "region":         "eu-central-1"
    },
    "builders": [
        {
            "access_key": "{{user `aws_access_key`}}",
            "ami_name": "kali-linux-aws-{{timestamp}}",
            "instance_type": "t2.medium",
            "region": "eu-central-1",
            "secret_key": "{{user `aws_secret_key`}}",
            "source_ami": "ami-0fbb40f398aef1e61",
            "ssh_username": "ec2-user",
            "type": "amazon-ebs",
            "tags": {
                "OS_Version": "Kali Linux",
                "Release": "Latest",
                "Base_AMI_Name": "{{ .SourceAMIName }}",
                "Project": "Kali"
              }
        }
    ],
    "provisioners": [
        {
            "type": "shell",
            "environment_vars": "DEBIAN_FRONTEND=noninteractive",
            "execute_command": "sudo -S env {{ .Vars }} {{ .Path }}",
            "inline":[
                "apt-get update",
                "apt -o Dpkg::Options::='--force-confnew' -q --force-yes -y full-upgrade",
                "apt-get autoremove -q -y",
                "apt-get autoclean -q -y"
            ]
        }
    ]
}