threatexpress/metatwin

The project is designed as a file resource cloner. Metadata, including digital signature, is extracted from one file and injected into another.

META TWIN

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 ___ ___    ___ ______   ____      ______  __    __  ____  ____
|   |   |  /  _]      | /    |    |      ||  |__|  ||    ||    \
| _   _ | /  [_|      ||  o  |    |      ||  |  |  | |  | |  _  |
|  \_/  ||    _]_|  |_||     | -- |_|  |_||  |  |  | |  | |  |  |
|   |   ||   [_  |  |  |  _  | --   |  |  |        | |  | |  |  |
|   |   ||     | |  |  |  |  |      |  |   \      /  |  | |  |  |
|___|___||_____| |__|  |__|__|      |__|    \_/\_/  |____||__|__|
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Author: @joevest
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The project is designed as a file resource cloner. Metadata, including digital signature, is extracted from one file and injected into another. Note: Signatures are copied, but no longer valid.

This project is based on a technique I've used for a few years. This has been updated and modified to include copying digital signatures.

Thanks @subtee for the tweet that encouraged this project to be updated and published !!

A blog post on this topic can be found at threatexpress.com

Resources

• Casey Smith (@subtee) MS Signed binary in 3 Steps - https://twitter.com/subTee/status/912769644473098240
• Resource Hacker - http://www.angusj.com/resourcehacker/
• SigThief - https://github.com/secretsquirrel/SigThief (Included as a pyinstaller compiled binary)

Note: SigThief and Resource Hacker may not detect valid metadata or digital signature. This project may switch to a different tool set, but for now, be aware of potential limitations.

Install

• Clone this project
• Download and unzip Resource Hacker to .\src\resource_hacker\ResourceHacker.exe
• Enjoy...

Description

A version of this project has existed for several years to help a binary blend into a target environment by modifying it's metadata. A binary's metadata can be replaced with the metadata of a source. This includes values such as Product Name, Product Version, File Version, Copyright, etc. In addition to standard metadata, sigthief is now used to copy a digital signature.

Usage

SYNOPSIS
    MetaTwin copies metadata and AuthentiCode signature from one file and injects into another.

SYNTAX
    Invoke-MetaTwin [-Source] <Object> [-Target] <Object> [-Sign] 

    Source     Source binary containing metadata and signature
    
    Target     Target binary that will be updated

    Sign       Optional setting that will add the source's digital signature   

Example

c:> powershell -ep bypass
PS> Import-Module c:\tools\metatwin.ps1
PS> cd c:\tools\metatwin\
PS> Invoke-MetaTwin -Source c:\windows\system32\netcfgx.dll -Target .\beacon.exe -Sign