external_c2 framework
A Python framework for building custom Command and Control interfaces that implements Cobalt Strike's External C2 specification for data transfer between frameworks.
A Python framework for building custom Command and Control interfaces that implements Cobalt Strike's External C2 specification for data transfer between frameworks.
Checked October 2026.
A Python framework designed for building and utilizing interfaces to transfer data between frameworks, with specific focus on extending Command and Control (C2) capabilities. The framework implements Cobalt Strike's External C2 specification, allowing users to create custom communication channels and data transfer mechanisms.
The framework consists of several core components including a builder system that reads configuration files and generates builds by replacing markers within code skeletons. The builder functionality is accessible through build_files.py and uses sample configuration files to customize the build process.
The architecture includes skeletons which serve as code templates containing markers that are dynamically populated with usable values during the build process. Additional components include frameworks, transports, and encoders that work together to facilitate data transfer operations.
The project builds upon and extends Outflank's External C2 project, providing enhanced capabilities for implementing custom C2 communication protocols and interfaces. The framework is designed to be extensible and may evolve to support additional C2 specifications beyond Cobalt Strike as the project develops.
No core features are listed for this product yet, so check the vendor's documentation for the full feature list.
No integrations are listed for this product yet. Check the vendor's documentation, or ask the vendor which integrations and APIs it supports.
Common questions about external_c2 framework: features, pricing and alternatives.
external_c2 framework is a product in the Red-Team & Adversary Emulation category. It covers C2, Red Team and Exploitation Framework.
external_c2 framework is free. Download and setup instructions are at https://github.com/Und3rf10w/external_c2_framework/.
Alternatives to external_c2 framework listed on CybersecTools:
Compare all external_c2 framework alternatives at https://cybersectools.com/alternatives/externalc2-framework
external_c2 framework is available as on-premises software. It is listed for enterprises. It is free.
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