deoptimizer - Evasion by machine code de-optimization.

项目说明

De-Optimizer

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This tool is a machine code de-optimizer. By transforming/mutating the machine code instructions to their functional equi it makes possible to bypass pattern-based detection mechanisms used by security products.

Why?

Bypassing security products is a very important part of many offensi engagements. The majority of the current A techniques used in different e tools, such as packers, shellcode encoders, and obfuscators, are dependent on the use of self-modifying code running on RWE memory regions. Considering the current state of security products, such e attempts are easily detected by memory analysis tools such as Moneta and Pe-sieve. This project introduces a new approach to code obfuscation with the use of machine code de-optimization. It uses certain mathematical approaches, such as arithmetic partitioning, logical inverse, polynomial transformation, and logical partitioning, for transforming/mutating the instructions of the target binary without creating any recognizable patterns. The tool is capable of transforming the instructions of a gi up to ~95% by using the mentioned de-optimization tricks.

Watch the presentation for more...

Why So Optimized? - Insomni'hack 2024

Installation

Download the pre-built release binaries HERE.

![Open in Cloud Shell]()

*From Source*

*Docker Install*

![Docker]()

Usage

> [!WARNING]
> This project is still in the de stage! The a transform gadgets, functions, and command line parameter names may be adjusted, backward compatibility is not guaranteed.

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#### Examples

Generate and de-optimize a 64 bit Metasploit reverse TCP shellcode

> [!WARNING]
> Some shellcodes may contain strings and other static data that must be skipped! By default, the deoptimizer will perform simple control flow tracing for detecting code paths and skipping possible data offsets automatically. Automatic tracing successfully works for smaller shellcodes. (tested with all Metasploit windows/*/meterpreter/* shellcodes) However, due to the complex nature of this task, tracing may end up skipping too much or completely failing for some large/complex shellcodes.

In such cases, disabling the tracer with --no-trace parameter is suggested. Without the tracer, the string offsets need to be specified manually using the --skip-offsets parameter.

The shellcodes produced by the Ha are good examples of such use cases. Ha produces large shellcodes that contain a full DLL file and a PE loader. The following example shows how to skip the DLL potion of the Ha.

Currently Supported Architectures

✅ Supported

🚧 In progress

❌ Unsupported

| Architecture | 32 | 64 |
|:-----------------:|:------:|:------:|
| x86 | ✅ | ✅ |
| ARM | ❌ | 🚧 |
| RISCV | ❌ | 🚧 |

TO DO

[ ] PE file support.

[ ] ELF file support

[ ] Mach-O file support.

[ ] ARM architecture support.

[ ] RISC5 architecture support.

项目信息

开发语言：Rust

Star 数：428

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Evasion by machine code de-optimization.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。