Process Inject Kit : Elevating Penetration Testing With Advanced Injection Capabilities

The Process Inject Kit is a specialized toolkit designed to enhance and customize process injection techniques in Cobalt Strike, a popular penetration testing tool.

Originally implemented in C, it has been ported to the C++ Beacon Object File (BOF) template, providing developers with greater flexibility and efficiency in defining and deploying custom injection techniques.

Core Features

The Process Inject Kit offers the following components:

• Source Code: Implements built-in process injection techniques.
• Aggressor Script: Facilitates integration of custom hooks into Cobalt Strike.
• Visual Studio Solution: Allows users to compile code and generate a distribution directory for deployment.

Key Injection Hooks

The kit revolves around two primary hooks introduced in Cobalt Strike 4.5:

1. PROCESS_INJECT_SPAWN: Enables users to define how the “fork and run” process injection technique is implemented. This method involves spawning a new process and injecting code into it, offering stability but requiring customization for operational security (OPSEC) improvements.
2. PROCESS_INJECT_EXPLICIT: Allows explicit injection into an existing process, giving users control over memory allocation, code writing, and execution flow.

These hooks replace the default built-in methods, empowering users to tailor injection techniques for specific post-exploitation scenarios such as running keyloggers, capturing screenshots, or executing payloads like Mimikatz.

To utilize the Process Inject Kit:

1. Build the Visual Studio solution in Release mode for both x64 and x86 architectures.
2. Load the process-inject.cna script into Cobalt Strike to activate the custom hooks.

Developers are encouraged to modify the kit to suit their engagement needs.

For example, they can integrate advanced OPSEC measures or experiment with alternative injection methods like indirect syscalls (e.g., Tartarus Gate).

This flexibility makes the kit valuable for red team operations requiring stealthy and adaptable techniques.

The Process Inject Kit enhances the versatility of Cobalt Strike by enabling tailored process injection strategies. It supports developers in improving OPSEC while maintaining compatibility with existing workflows.

By leveraging this kit, penetration testers can execute more sophisticated and secure post-exploitation activities.