Introduction VBAFuncRecord is a binary structure used to represent a single method within a VBA module. It describes various aspects of the function or sub, such as its name, visibility, return type, and argument list.
Structure Description Information name Offsets Value Type Flag1 0 byte Flag2 1 byte RecordName 2 string NextRecord 4 int32 UserMemId 8 int32 HelpID 12 int32 DescOffset 16 int32 InvokeFuncOffset 20 int16 HasUserMemFlag 25 byte Version-dependent fields These field are present for all version, but with different position.
Introduction In VB6 and VBA, the VB_UserMemId attribute is used to assign a unique identifier to a method or property of a class module. This identifier, also known as the user-defined member ID, can be used to invoke the method or property at runtime using the IDispatch interface.
The VB_UserMemId attribute can be applied to methods and properties in a class module by including the following line before the method or property declaration:
Introduction We’re thrilled to introduce our new blog series that delves deep into the technical intricacies of MS Office and VBA internals. This series is dedicated to all the malware analysts out there who are looking to sharpen their reverse engineering and analysis skills for MS Office documents.
As the cyber world becomes increasingly complex, it’s crucial for cybersecurity experts to stay one step ahead of potential threats. Our blog series will take a closer look at the file formats, document structures, and programming languages that form the backbone of MS Office and VBA internals.
Introduction This piece aims to shed light on crucial aspects of decompilers, prompted by the grievances shared by many regarding their inability to successfully recover applications using other Visual Basic decompilers. The crux of the issue lies in the compilation choice between P-Code and Native code in Visual Basic 6.0 applications. This decision significantly influences the decompilation process due to the inherent differences between these compilation methods. A pivotal question arises for anyone seeking a decompiler: “Is my application compiled in native or P-Code mode?
VBReFormer has become an advanced decompiler for Visual Basic applications. In search of challenging crackmes for educational decompiling examples, I turned to Crackmes.de, which boasts a vast array of crackme applications.
I selected “Step 2” by yudi for my first crackme-solving demonstration using VBReFormer Professional. This guide will illustrate the straightforward process of deciphering yudi’s Step 2.
Running the Application:
Running yudi’s Step 2 reveals that a serial is generated based on the user’s name.
We are thrilled to announce the release of VBReFormer Professional 5.4, exclusively for our licensed users.
Download the Update:
Access the latest version by downloading it from your client account at our website.
What’s New in VBReFormer Professional 5.4? Enhanced Decompilation Engine: The analysis engine for disassembling and decompiling has been upgraded to recover language structure information more effectively. This improvement makes it possible to decompile simple conditional blocks like If/End If and Do/Loop/While.