wearyourheartout: Serverless Prey - Serverless Functions For Establishing Reverse Shells To Lambda, Azure Functions, And Google Cloud Functions

Tuesday, April 14, 2020

Serverless Prey - Serverless Functions For Establishing Reverse Shells To Lambda, Azure Functions, And Google Cloud Functions

Serverless Prey is a collection of serverless functions (FaaS), that, once launched to a cloud environment and invoked, establish a TCP reverse shell, enabling the user to introspect the underlying container:

Panther: AWS Lambda written in Node.js
Cougar: Azure Function written in C#
Cheetah: Google Cloud Function written in Go

This repository also contains research performed using these functions, including documentation on where secrets are stored, how to extract sensitive data, and identify monitoring / incident response data points.

Disclaimer
Serverless Prey functions are intended for research purposes only and should not be deployed to production accounts. By their nature, they provide shell access to your runtime environment, which can be abused by a malicious actor to exfiltrate sensitive data or gain unauthorized access to related cloud services.

Contributors
Eric Johnson - Principal Security Engineer, Puma Security
Brandon Evans - Senior Application Security Engineer, Asurion

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