Visual Basic 6 Exe File Decompiler

Posted on 16-04-2021 by admin

Visual Studio Decompiler

^{[ 🌐 📩 🔥 ]}

Let's be honest, there is no reason to remember how to decompile stuff with the various tools available. Wouldn't it be nice to just decompile the $h*! out of things right off the fingertips in Visual Studio Code? Well, here we go:

This extension decompiles ...

Binary executables for various platforms
- as supported by Ghidra; Windows PE, Linux ELF, IOS, etc..
- or IDAPro (Experimental, Windows Only for now)
Java Jar archives and compiled Classes
Android APK's
Python .pyc and .pyo
Ethereum/EVM based Smart Contracts
- (Experimental, Linux/MacOs only)

Just right-click → Decompile on a supported executable and wait for the magic to happen.

The decompilation result is added to a temporary sub-workspace. You can right-click → Download files to your local file-system right from the sub-workspace.

Have phun 🙌

Tour

macOS

Windows (Ghidra vs. IDAPro)

Ethereum Smart Contract

Save the EVM byte-code in a file with extension .evm, then right-click → Decompile.

Setup

Requirements: General

Requires Java (11+) to be installed system-wide. Just install the latest JRE/JDK for your OS (e.g. OpenJDK, Oracle JDK).
Other tools are bundled with the extension. Just make sure Java is available in your PATH.

Requirements: Binary executables (Ghidra / IDA Pro)

Requires a working installation of Ghidra (← Download) to decompile executables
- either available in PATH (like when you install it with brew cask install ghidra on os-x; or set-up manually)
- otherwise please specify the path to the executable <ghidra>/support/analyzeHeadless in code → preferences → settings: vscode-decompiler.tool.ghidra.path and make sure that the analyzeHeadless script runs without errors (and is not prompting for the JDK Home 🤓). Here's a sample Ghidra config for Windows:
(Experimental; Windows Only) Optional a licensed version of IDA Pro with decompiler support.
- specify the path to the idaw executable in code → preferences → settings: vscode-decompiler.tool.idaPro.path, e.g. c:IDA68idaw.exe.
- set preference to idaPro (experimental Windows Only) in code → preferences → settings: vscode-decompiler.default.decompiler.selected.
- we'll automatically try to run 32 and 64bits idaw on the target application (preference on what executable is configured by you)
- If you're running <= IDA Pro 6.6 and the normal IDA decompilation mode does not work you can try the set preference to idaPro legacy hexx-plugin (experimental Windows Only) in code → preferences → settings: vscode-decompiler.default.decompiler.selected. Note: Use this method only if the normal IDA Pro mode doesnt work. Caveat: idaw*.exe must not be in a path that contains spaces, ask @microsoft why 😉.

Requirements: Python

Python decompilation requires pip3 install uncompyle6 (see settings)
- specify the uncompyle6 script location in code → preferences → settings: vscode-decompiler.tool.uncompyle.path or set to uncompyle6 if it is available in PATH

Requirements: Smart Contracts (EVM byte-code)

The pseudocode generator panoramix/eveem requires a working installation of python3.8 or newer.
- specify the python3.8 path in code → preferences → settings: vscode-decompiler.tool.python38.path (e.g. /usr/local/opt/python@3.8/bin/python3.8 (macos/homebrew))
- make sure pip for python3.8 is installed
- install panoramix dependencies: $ /usr/local/opt/python@3.8/bin/python3.8 -m pip install coloredlogs requests web3 timeout_decorator
Note: Panoramix is run in local mode. EVM byte-code is not sent to eveem.org.
- It will attempt to download a function signature database on first load.
- It will cache files to <userhome>/.panoramix.
No Windows support :/ (see this issue).

Setting tool preferences

code → preferences → settings:

Set default decompiler preference to ghidra (default) or idaPro (experimental Windows Only) (requires a licensed version of IDAPro + Decompiler)
- vscode-decompiler.default.decompiler.selected
Set preference for java decompilation to JADX or JD-CLI (default)
- vscode-decompiler.java.decompiler.selected
Set preference for android apk decompilation to dex2jar + jd-cli (slow) or JADx (default)
- vscode-decompiler.apk.decompiler.selected'

Credits

This extension wouldn't be possible without the smarties that are developing the following reverse-engineering tools:

Ghidra by @NSA/CSS
JadX by @skylot
JD-CLI by @Josef Cacek
dex2Jar by @Bob Pan
python-uncompyle6 by @R. Bernstein
panoramix the engine behind eveem.org created by @Tomasz Kolinko
LogoMakr (CC; Logo)

Release Notes

see CHANGELOG

Exe Decompiler Free

In the FAQ of the Boomerang decompiler (which currently only decompiles to C-code) they make a brief mention that Visual Basic exes happen to include a lot of metadata, so a Visual Basic decompiler might be able to produce better source code for Visual Basic programs than what Boomerang can give you. Free download Visual Basic 5.0 and 6.0 exe, dll and ocx files decompiler, VB.NET disassembler, hex editor.

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