dumpulator - An easy-to-use library for emulating memory dumps.

项目说明

dumpulator

Note: This is a work-in-progress prototype, please treat it as such. Pull requests are welcome! You can get your feet wet with good first issues

An easy-to-use library for emulating code in minidump files. Here are some links to posts/ using dumpulator:

_{Feel free to send a pull request to add your article here!}

Examples

Calling a function

The example below opens StringEncryptionFun_x64.dmp (download a copy here), allocates some memory and calls the decryption function at 0x140001000 to decrypt the string at 0x140017000:

The StringEncryptionFun_x64.dmp is collected at the entry point of the tests/StringEncryptionFun example. You can get the compiled binaries for StringEncryptionFun here

Tracing execution

This will create StringEncryptionFun_x64.dmp.trace with a list of instructions executed and some helpful indications when switching modules etc. Note that tracing _significantly_ slows down emulation and it's mostly meant for debugging.

Reading utf-16 strings

Running a snippet of code

Say you have the following function:

You only want to execute the prolog and set up some registers:

The quiet flag suppresses the logs about DLLs loaded and memory regions set up (for use in scripts where you want to reduce log spam).

Custom syscall implementation

You can (re)implement syscalls by using the decorator:

All the syscall function prototypes can be found in ntsyscalls.py. There are also a lot of examples there on how to use the API.

To hook an existing syscall implementation you can do the following:

Custom structures

Since v0.2.0 there is support for easily declaring your own structures:

To instantiate these structures you have to use a Dumpulator instance:

If you pass a pointer value as a second argument the structure will be read from memory. You can declare pointers with myptr: P[MY_STRUCT] and dereferences them with myptr[0].

Collecting the dump

~~There is a simple x64dbg plugin a called MiniDumpPlugin~~ The minidump command has been integrated into x64dbg since 2022-10-10. To create a dump, pause execution and execute the command MiniDump my.dmp.

Installation

From PyPI (latest release):

To install from source:

Install for a de en:

Related work

What sets dumpulator apart from sandboxes like speakeasy and qiling is that the full process memory is a. This impro because you can emulate large parts of malware without e unicorn. Additionally only syscalls have to be emulated to provide a realistic Windows en (since e actually _is_ a legitimate process en).

Credits

项目信息

开发语言：C

Star 数：885

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An easy-to-use library for emulating memory dumps. Useful for malware analysis (config extraction, unpacking) and dynamic analysis in general (sandboxing).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。