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Orion is a lightweight remote administration tool written in C# / .NET. It provides an intuitive operator console (the server) and a client agent that runs on the target machine, with stable, encrypted communication between them.
Orion is intended for legitimate and authorized use only — remote technical support, day-to-day system administration, security assessment, and authorized red-team exercises. The project is licensed under GPL-3.0 (free and open source).
- 首次运行 — First launch: legal disclaimer, certificate wizard and the main window
- 设置 — Listener options, Telegram notifications and the built-in FRP tunnel (with a full ChmlFrp walkthrough)
- 构建客户端 — Building a client with the builder (basic, connection, installation and assembly settings)
- Building from Source — prerequisites and how to compile the server and client
- Features — a summary of what Orion can do
- Plugin Development — authoring server-side and client-side plugins
- FAQ — common questions and troubleshooting
Orion is distributed under the GNU General Public License v3.0. The full text is in LICENSE.md. Any redistribution, including modified versions, must remain under GPL-3.0 and preserve the copyright and license notices.
Orion derives parts of its code from the open-source project Quasar RAT (MIT License, Copyright (c) 2025 MaxXor); those parts are provided under their original MIT terms.