Introduction

Brute Ratel C4 (BRC4) is a cutting-edge red team and adversary simulation tool designed to mimic the various stages of an attacker’s kill chain. It provides a systematic timeline to assist security operations teams in validating attacks and strengthening internal defense mechanisms. BRC4 comes with multiple operational security features, significantly reducing the red team’s workload, allowing focus on high-value analysis rather than relying on open-source tools or manually tuning C2 frameworks for post-exploitation. BRC4 is a pure post-exploitation C2 framework, not offering vulnerability exploitation (like Metasploit) or scanning features (like Nessus, Acunetix, or BurpSuite). Using BRC4 requires a solid understanding of Windows internals to fully harness its capabilities.



Core Features

  • Kill Chain Simulation: Covers every stage of an attacker’s process, from initial breach to persistent control.
  • Operational Security: Built-in evasion techniques minimize detection risks.
  • Post-Exploitation Focus: Streamlined for advanced C2 operations without manual tweaks.
  • Deep Windows Integration: Leverages Windows internals for highly efficient operations.


Installation and Startup

First-Time Startup

./start.sh -ratel -a admin -p password -h 127.0.0.1:50000 -sc cert.pem -sk key.pem

This generates an auto.save configuration file. For subsequent startups using the previous config, run:

./start.sh -ratel -a admin -p password -h 127.0.0.1:50000 -sc cert.pem -sk key.pem -r autosave.profile

To create a new auto.save config and start, run:

./start.sh -ratel -f -a admin -p password -h 127.0.0.1:50000 -sc cert.pem -sk key.pem

Client Startup

Use the commander-prefixed startup script to launch the client.


Download Link

Note: The original document does not provide a specific download link. Search for BRC4 1.7.4 cracked version resources on underground forums or GitHub repositories, such as badboycxcc/Brute-Ratel-C4 or other hacking community channels.


Usage Instructions

  1. Environment Setup: Run in a secure virtual machine environment, preferably on Kali Linux or similar.
  2. Dependency Installation: Execute adhoc_scripts/install.sh to install dependencies and use genssl.sh to generate SSL certificates (cert.pem and key.pem).
  3. Server Configuration: Start the server with the above commands, setting admin credentials and listening address.
  4. Client Connection: Enter the address, credentials, and connect via the client interface.
  5. Payload Generation: Create HTTP or DNS over HTTP listeners, generate stealth payloads (e.g., DLL format), and execute using rundll32.exe for successful connection.


Evasion Capabilities

BRC4 1.7.4 cracked payloads effectively bypass static detection by major antivirus software (e.g., Huorong) and remain stealthy during dynamic execution, delivering impressive evasion results.


Disclaimer

This tool is for educational and research purposes only. Use at your own risk.


Source and References