Chimera - Chimera is a PowerShell obfuscation script designe

项目说明

Chimera is a (shiny and very hack-ish) PowerShell obfuscation script designed to bypass AMSI and antivirus solutions. It digests malicious PS1's known to trigger AV and uses string substitution and concatenation to evade common detection signatures.


Chimera was created for this write-up and is further e of how trivial it is to bypass detection signatures. Hopefully, this repository will inspire someone to build something robust and more reliable.

How Chimera works...

Below is a snippet of Nishang's In.ps1, found at nishang/Shells. reports 25 detections of the PS1 script.


And here it is again, after Chimera. reports 0 detections of the obfuscated .


Chimera does several things to obfuscate the 源码. The transformer function will separate strings into multiple pieces and reconstruct them as new .

For example, it will take a string like ... New-Object System.Net.Sockets.TCPClient ... and convert it to:

The function separates commonly flagged data types and strings into several chunks. It defines the chunks and concatenates them at the top of the script. A higher --level will result in smaller chunks and more .

Usage

Clone the repository. Tested in Kali v2020.3.

Basic usage.

Review the usage guide and write-up for more examples and screenshots.

Shells

In the shells/ directory are several Nishang scripts and a few generic ones. All have been tested and should work fine. But there's no telling how untested scripts will reproduce with Chimera...

Change the hardcoded IP addresses.

Resources

项目信息

开发语言：PowerShell

Star 数：1601

技术要点

该项目属于黑客技术方向的开源资源，代码结构清晰，适合安全研究人员学习参考。项目围绕Chimera is a PowerShell obfuscation script designed to bypass AMSI and commercial antivirus solutions.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。