Using Payloads

The configuration file

Payload configuration is currently defined in the dref-config.yml file located in the project's root directory.

The default configuration file looks like this:

general:
  domain: attacker.com
  address: 1.2.3.4

targets:
  - target: "demo"
    script: "web-discover"

The targets section of the configuration is a list of YAML "target" objects. These are the payloads that are configured to be delivered by dref.

The target key serves a couple of purposes internally, but it is mainly the subdomain that delivers the payload.

The script key is the payload script that will be delivered when a user visits the target subdomain. These are defined in dref/scripts/src/payloads/.

In plain English the configuration above says:

When a user visits demo.attacker.com deliver the payloads/web-discover.js script.

Changing the configuration file

At this point, the Docker environment has to be restarted to reflect changes made to the dref-config.yml file:

$ docker-compose down
$ docker-compose up -d

Payload configuration keys

Key	Type	Description
target	String	Target subdomain that will deliver the initial payload. Must be a valid subdomain string.
script	String	Payload delivered by the target subdomain. Must be a JavaScript file located in dref/scripts/src/payloads/.
args	Object	Valid YAML sub-object containing arguments to be passed to the script. These arguments will be accessible to the script payload as globals under window.args. Must be a valid YAML object.

Rebinding on other ports

By default dref allows you to DNS rebind on the following standard web ports: 80, 8000, 8080, 8888. This is controlled by the docker-compose port mapping in docker-compose.yml.

To support DNS rebinding on an additional port, simply add a mapping from that port on the host to port 80 in the api container by editing docker-compose.yml. For example to support DNS rebinding on port 4000, the configuration would look like:

  api:
    image: node:9.11.1-alpine
    networks:
      - dref
    ports:
      - 0.0.0.0:4000:80