NixImports - A .NET malware loader, using API-Hashing to evade

项目说明

NixImports

How does it work?

NixImports uses my managed API-Hashing implementation HInvoke, to dynamically resolve most of it's called functions at runtime.
To resolve the functions HInvoke requires two hashes the typeHash and the methodHash. These hashes represent the type name and the methods FullName, on runtime HInvoke parses the entire mscorlib to find the matching type and method.
Due to this process, HInvoke does not leave any import references to the methods called trough it.

Another interesting feature of NixImports is that it avoids calling known methods as much as possible, whene NixImports uses
internal methods instead of their wrappers. By using internal methods only we can evade basic hooks and monitoring employed by some security tools.

For a more detailed explanation checkout my blog post.

You can generate hashes for HInvoke using this tool

How to use

NixImports only requires a filepath to the .NET binary you want to pack with it.

It will automatically generate a new executable called Loader.exe in it's root folder. The loader executable will contain your encoded payload and the stub code required to run it.

Tips for Defenders

If youre interested in detection engineering and possible detection of NixImports, checkout the last section of my blog post

Or click here for a basic yara rule co NixImports.

项目信息

开发语言：C#

Star 数：207

技术要点

该项目属于病毒分析方向的开源资源，代码结构清晰，适合安全研究人员学习参考。项目围绕A .NET malware loader, using API-Hashing to evade static analysis展开，提供了可运行的实现，对理解相关安全机制、工具原理与攻防技术具有较高的研究价值。

从技术实现角度看，此类项目的核心在于对底层原理的深入理解与工程化落地。开发者在研究过程中可以结合官方文档与社区讨论，梳理项目的初始化流程、核心模块职责与数据流转，逐步掌握其中的技术细节与设计思路。

使用与学习建议

1. 下载源码压缩包，解压到本地环境。

2. 根据项目类型准备对应的运行环境与依赖。

3. 按照 README 中的步骤完成配置与部署。

4. 在隔离的测试环境中运行验证，避免影响生产系统。

免责声明

本资源来源于开源社区，仅供安全研究、技术学习与合法授权范围内的攻防演练使用，请勿用于任何非法或侵害他人权益的用途。使用本项目产生的一切后果由使用者自行承担。