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PwnAuth

A web application framework for launching and managing OAuth abuse campaigns.

Created By Doug Bienstock (@doughsec) while at Mandiant/FireEye

Minimum requirements

  • An Internet accessible server (tested running Ubuntu 16.04)
  • Nginx
  • Docker (apt install docker.io)
  • Docker-Compose (newest version from docker website)
  • A Valid SSL certificate

Installation

  1. Clone the repository onto your server
  2. Inside Dockerfile customize the settings to your site:
    • Change DJANGO_SITE to match the FQDN or IP address you will use to access the PwnAuth App.
    • Change the SECRET_KEY to a new random value.
    • Set DJANGO_ENV to prod or dev depending on if you are in production or not.
  3. Configure your SSL certificates and NGINX. I have provided a sample NGINX configuration in nginx/oauth.conf
  4. Run setup.sh as root. This will build the docker services for the OAuth application as well as setup an initial Django administrator for you to use the application with.
  5. Login to the app. Navigate to /auth/login in your browser to login to the application with the account you just created.

For more first use instructions see the wiki

Modules

PwnAuth is designed to be modular. A new Identity Provider can easily be supported by developing the necessary database models and views to interact with the Resource Server. As long as you follow the module implementation guidelines, the GUI will automatically detect the module and it will be ready for use.

Office 365

  1. You must create a new Application within Microsoft Azure from the Microsoft Azure Portal
  2. You must add a "Web" Redirect URL to receive OAuth tokens. The default configuration for PwnAuth is /oauth/api/microsoft/callback
  3. Be sure to create a client secret and ensure API Permissions include user.read and offline_access
  4. Import the application settings into the application using the GUI
  5. Send out your phishing emails using the authorization_url_full link and wait for responses!

Usage

PwnAuth is designed to be interacted with inside of a browser. There is also an API available available for power users. To learn more about using PwnAuth see the wiki.

Logging

Logs are written to /var/log/oauth on your host system where docker is running. The audit log records all actions taken in the application and by whom.

Detection

Detection can be quite difficult due to the limited amount of information on these applications that is exposed. In general the best bet is to hunt for specific scopes that would be suspicious (i.e. offline access, sending/reading of mail) as well as apps that have redirect URLs (the URL that receives the token) that are strange. This issue is further compounded by the large number of "legitimate" applications out there that request incredibly wide scopes.

See my related repository of hunting scripts, OAuthHunting

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