Start Hacking: CloudFoxable

Read the blog for more details: Introducing CloudFoxable: A Gamified Cloud Hacking Sandbox

Background

CloudFox helps penetration testers and security professionals find exploitable attack paths in cloud infrastructure. However, what if you want to find and exploit services not yet present in your current environment? What if you lack access to an enterprise AWS environment?

Enter CloudFoxable, an intentionally vulnerable AWS environment created specifically to showcase CloudFox’s capabilities and help you find latent attack paths more effectively. Drawing inspiration from CloudGoat, flaws.cloud, flaws2.cloud and Metasploitable 1-3, CloudFoxable provides a wide array of flags and attack paths in a CTF format.

Similar to CloudGoat and IAM-Vulnerable, CloudFoxable deploys intentionally vulnerable AWS resources in a user-managed playground account, for users to learn about identifying and exploiting cloud vulnerabilities. However, more like flaws.cloud, your experience is more web based and guided.

• Total number of challenges: 18

Terraform Setup & Basic Usage

CloudFoxable uses Terraform to deploy and manage intentionally vulnerable AWS infrastructure. This section provides the minimum required guidance to get Terraform installed and to deploy, modify, and remove CloudFoxable resources.

terraform version

cd cloudfoxable/aws

terraform init

terraform plan

terraform apply

terraform destroy

A Modular Approach

Similar to IAM-Vulnerable, some challenges are enabled by default (the ones that have little or no cost implications), and others are disabled by default (the ones that incur cost if deployed). This way, you can enable specific modules as needed. The mechanism for enabling/disabling challenges is a little different than IAM-Vulnerable though.

Within cloudfoxable.bishopfox.com, each challenge will tell you if you need to make any terraform changes (aka deploy something) to complete the challenge. The way you do this is to edit terraform.tfvars and update the enabled flag from false to true as needed.

Here's an example:

############################
# Enabled/Disabled Challenges
############################

# Always on (Low or No cost)
challenge_foo_enabled = true
challenge_bar_enabled = true
challenge_alice_enabled = true

# Enable as needed (These challenges incur cost)
challenge_bob_enabled = false
challenge_mallory_enabled = false

To enable the mallory challenge, you would simply update the following line:

challenge_mallory_enabled = true

After you enable a challenge, you will need to re-run terraform apply:

terraform apply

You have now deployed the mallory challenge.

Cleanup

Whenever you want to remove all of the CloudFoxable-created resources, you can run these commands:

1. cd cloudfoxable/aws
2. terraform destroy

Build with Docker

If you're using Windows, you might encounter issues when deploying some of the challenges due to platform-specific limitations. To avoid this, a Dockerfile is provided to help you build and run the application in a consistent environment across different systems.

git clone https://github.com/BishopFox/cloudfoxable.git
cd cloudfoxable

docker build --no-cache -t cloudfoxable .

cd aws
docker run -it -v $env:USERPROFILE/.aws/credentials:/root/.aws/credentials -v ${PWD}:/cloudfoxable/aws cloudfoxable

Hungry for more?

https://github.com/iknowjason/Awesome-CloudSec-Labs

Contributing

If you'd like to add a new challenge, here's the steps within CloudFoxable once you fork the repo:

• cp aws/challenges/1_challenge_template aws/challenges/challenge_name
• Rename the challenge template folder and challenge_name.tf file to the name of your challenge.
• Add your terraform code
• Make a new variable in aws/variables.tf

  variable "challenge_name_enabled" {
  description = "Enable or disable challenge_name challenge (true = enabled, false = disabled)"
  type        = bool
  default     = false
  }
  

• Add it to the "Enabled/Disabled Challenge section in terraform.tfvars.example. Specify if it should be enabled by default (low/no cost), or disabled by default (costs $$)

  challenge_name_enabled = false
  

• Add the module to aws/main.tf

  module "challenge_challenge_name" {
    source = "./challenges/challenge-name"
    count = var.challenge_name_enabled ? 1 : 0
    aws_assume_role_arn = (var.aws_assume_role_arn != "" ? var.aws_assume_role_arn : data.aws_caller_identity.current.arn) 
    account_id = data.aws_caller_identity.current.account_id
    aws_local_profile = var.aws_local_profile
    user_ip = local.user_ip
    }
  

• Add the challenge name to the enabled_challenges local variable:

    var.challenge_name_enabled ?                   "name                      | \$12/month    |" : ""