Hacking Tools

DLL Universal Patcher – A Comprehensive Guide To Advanced Binary Patching

DLL Universal Patcher is a flexible and convenient code patcher that doesn’t touch the files on disk.

It can be used for replacing any tasks that you’d otherwise achieve with on-disk patching, such as fixing old software on modern machines, or fixing bugs in others’ software.

In addition, due to more control over when the patching happens, it is possible to patch packed executables.

How To Use

  1. Pick a suitable dll to proxy, like version.dll
  2. Use dll-proxy-generator.exe --import-dll "dll_universal_patcher.dll" --import "dummy" "C:\Windows\System32\version.dll" to generate a suitable proxy dll
  3. Write up your patches into patches.json (more on this later)
  4. Place the generated dll, dll_universal_patcher.dll, and patches.json in target directory to perform dll hijacking

How To Use (Advanced)

  1. Pick a suitable dll to proxy, like version.dll
  2. Use dll-proxy-generator.exe --import-dll "dll_universal_patcher.dll" --import "dummy" "C:\Windows\System32\version.dll" to generate a suitable proxy dll
  3. Write up your patches into patches.json (more on this later)
  4. Use a tool like CFF Explorer to add the config as a RCDATA resource with ID 1 and neutral language to dll_universal_patcher.dll
  5. Place the generated dll and dll_universal_patcher.dll in target directory to perform dll hijacking

patches.json

Example:

[
    {
        "modules": [ "winver.exe", "{exe}" ],
        "pattern": "01 02 03 04 05 ? 06 ?? 07",
        "replacement": "90 90 90 90 C3",
        "min_matches": 1,
        "max_matches": 3,
        "on_initialize": false,
        "on_process_initialized": true,
        "on_before_dllmain": false,
        "is_code": true,
        "allowed_to_fail": false,
        "multishot": false
    }
]

For more info on the options, check out the schema

Varshini

Varshini is a Cyber Security expert in Threat Analysis, Vulnerability Assessment, and Research. Passionate about staying ahead of emerging Threats and Technologies.

Recent Posts

Playwright-MCP : A Powerful Tool For Browser Automation

Playwright-MCP (Model Context Protocol) is a cutting-edge tool designed to bridge the gap between AI…

2 weeks ago

JBDev : A Tool For Jailbreak And TrollStore Development

JBDev is a specialized development tool designed to streamline the creation and debugging of jailbreak…

2 weeks ago

Kereva LLM Code Scanner : A Revolutionary Tool For Python Applications Using LLMs

The Kereva LLM Code Scanner is an innovative static analysis tool tailored for Python applications…

2 weeks ago

Nuclei-Templates-Labs : A Hands-On Security Testing Playground

Nuclei-Templates-Labs is a dynamic and comprehensive repository designed for security researchers, learners, and organizations to…

2 weeks ago

SSH-Stealer : The Stealthy Threat Of Advanced Credential Theft

SSH-Stealer and RunAs-Stealer are malicious tools designed to stealthily harvest SSH credentials, enabling attackers to…

2 weeks ago

ollvm-unflattener : A Tool For Reversing Control Flow Flattening In OLLVM

Control flow flattening is a common obfuscation technique used by OLLVM (Obfuscator-LLVM) to transform executable…

2 weeks ago