Covenant – RedTeam Collaborative .NET C2 Framework

Covenant is a .NET command and control framework that aims to highlight the attack surface of .NET, make the use of offensive .NET tradecraft easier, and serve as a collaborative command and control platform for red teamers.

Covenant - RedTeam Collaborative .NET C2 Framework
Covenant – RedTeam Collaborative .NET C2 Framework

The framework has several key features that make it useful and differentiate it from other command and control frameworks:

  • Intuitive Interface – provides an intuitive web application to easily run a collaborative red team operation.
  • Multi-Platform – targets .NET Core, which is multi-platform. This allows user to run natively on Linux, MacOS, and Windows platforms. Additionally, The framework supports docker as well, allowing it to run within a container on any system that has docker installed.
  • Multi-User – supports multi-user collaboration. The ability to collaborate has become crucial for effective red team operations. Many users can interact with the same server and operate independently or collaboratively.
  • API Driven – driven by an API that enables multi-user collaboration and is easily extendible. Additionally, includes a Swagger UI that makes development and debugging easier and more convenient.
  • Listener Profiles – Covenant supports listener “profiles” that control how the network communication between Grunt implants and Covenant listeners look on the wire.
  • Encrypted Key Exchange – Covenant implements an encrypted key exchange between Grunt implants and Covenant listeners that is largely based on a similar exchange in the Empire project, in addition to optional SSL encryption. This achieves the cryptographic property of forward secrecy between Grunt implants.
  • Dynamic Compilation – Covenant uses the Roslyn API for dynamic C# compilation. Every time a new Grunt is generated or a new task is assigned, the relevant code is recompiled and obfuscated with ConfuserEx, avoiding totally static payloads.
  • Inline C# Execution – Covenant borrows code and ideas from both the SharpGen and SharpShell projects to allow operators to execute C# one-liners on Grunt implants. This allows for similar functionality to that described in the SharpShell post, but allows the one-liners to be executed on remote implants.
  • Tracking Indicators – Covenant tracks “indicators” throughout an operation, and summarizes them in the Indicators menu. This allows an operator to conduct actions that are tracked throughout an operation and easily summarize those actions to the blue team during or at the end of an assessment for deconfliction and educational purposes.
  • Developed in C#

You can read more and download the framework over here: https://github.com/cobbr/Covenant

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