lazy_importer - library for importing functions from dlls in a hid

项目说明

lazy importer ![]()

A simple and easy to use header only library to make the life of a reverse engineer much harder.

small example

IDA output when compiling first line

features

Does not leave any strings in memory.

Does not allocate any memory.

Can be easily inlined.

Does not leave any imports in the executable.

Produces extremely small assembly.

Non caching functions do not lea in data sections.

Hashes are randomized for each compilation to defeat basic hash database attacks.

documentation

LI_FN(function_pointer) -> lazy_function

LI_FN_DEF(function_type) -> lazy_function

LI_MODULE(module_name) -> lazy_module

---

safe indicates that when function cannot complete its task successfully 0 is returned instead of undefined behaviour manifesting.

cached indicates that the result is only computed during the first call and later reused.

forwarded indicates that export forwarding will be correctly resolved.

#### lazy_module

<table>
<tr>
<th>function</th>
<th>safe</th>
<th>cached</th>
</tr>
<tr>
<td colspan="4">Attempts to find the gi and returns its address</td>
</tr>
<tr>
<td><code>get<T = void*>() -> T</code></td>
<td align="center">:x:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>safe<T = void*>() -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>cached<T = void*>() -> T</code></td>
<td align="center">:x:</td>
<td align="center">:white_check_mark:</td>
</tr>
<tr>
<td><code>safe_cached<T = void*>() -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:white_check_mark:</td>
</tr>
<tr>
<td colspan="4">Attemps to find the gi using the gi pointer</td>
</tr>
<tr>
<td><code>in<T = void*, Ldr>(Ldr ldr_entry) -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>in_cached<T = void*, Ldr>(Ldr ldr_entry) -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:white_check_mark:</td>
</tr>
</table>

#### lazy_function<F>

<table>
<tr>
<th>function</th>
<th>safe</th>
<th>cached</th>
<th>forwarded</th>
</tr>
<tr>
<td colspan="4">calls resol using gi</td>
</tr>
<tr>
<td><code>operator()(...) -> result_of<F, ...></code></td>
<td align="center">:x:</td>
<td align="center">:x:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td colspan="4">attempts to resolve an export in all loaded modules and returns the function address</td>
</tr>
<tr>
<td><code>get<T = F>() -> T</code></td>
<td align="center">:x:</td>
<td align="center">:x:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>safe<T = F>() -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>cached<T = F>() -> T</code></td>
<td align="center">:x:</td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>safe_cached<T = F>() -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>forwarded<T = F>() -> T</code></td>
<td align="center">:x:</td>
<td align="center">:x:</td>
<td align="center">:white_check_mark:</td>
</tr>
<tr>
<td><code>forwarded_safe<T = F>() -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
<td align="center">:white_check_mark:</td>
</tr>
<tr>
<td><code>forwarded_cached<T = F>() -> T</code></td>
<td align="center">:x:</td>
<td align="center">:white_check_mark:</td>
<td align="center">:white_check_mark:</td>
</tr>
<tr>
<td><code>forwarded_safe_cached<T = F>() -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:white_check_mark:</td>
<td align="center">:white_check_mark:</td>
</tr>
<tr>
<td colspan="4">attempts to resolve an export in the gi and returns the function address</td>
</tr>
<tr>
<td><code>in<T = F, A>(A module_address) -> T</code></td>
<td align="center">:x:</td>
<td align="center">:x:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>in_safe<T = F, A>(A module_address) -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>in_cached<T = F, A>(A module_address) -> T</code></td>
<td align="center">:x:</td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>in_safe_cached<T = F, A>(A module_address) -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td colspan="4">attempts to resolve an export in <code>ntdll</code> and returns the function address</td>
</tr>
<tr>
<td><code>nt<T = F>() -> T</code></td>
<td align="center">:x:</td>
<td align="center">:x:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>nt_safe<T = F>() -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>nt_cached<T = F>() -> T</code></td>
<td align="center">:x:</td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
</tr>
<tr>
<td><code>nt_safe_cached<T = F>() -> T</code></td>
<td align="center">:white_check_mark:</td>
<td align="center">:white_check_mark:</td>
<td align="center">:x:</td>
</tr>
</table>

#### extra configuration

| #define | effects |
| ----------------------------------------- | --------------------------------------------------------------------------------------- |
| LAZY_IMPORTER_NO_FORCEINLINE | disables force inlining |
| LAZY_IMPORTER_CASE_INSENSITIVE | enables case insensiti. Might be required for forwarded export resolution. |
| LAZY_IMPORTER_CACHE_OPERATOR_PARENS | uses cached() instead of get() in operator() of lazy_function |
| LAZY_IMPORTER_RESOL | uses forwarded() in get(). WARNING does not apply to nt() and in(). |
| LAZY_IMPORTER_HARDENED_MODULE_CHECKS | adds extra sanity checks to module enumeration. |
| LAZY_IMPORTER_NO_CPP_FORWARD | Remo on <utility> c++ header. |

example output

People that ha this project

I would like to thank people that ha out to me and donated some money to support me and my projects

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项目信息

开发语言：C++

Star 数：1929

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library for importing functions from dlls in a hidden, reverse engineer unfriendly way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。

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资源标题	lazy_importer - library for importing functions from dlls in a hid
所属分类	病毒分析
发布作者	admin
发布时间	2026-10-05 23:12:11
下载权限	免费下载
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浏览次数	406
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