Monthly Archives: July 2021

COM structured storage is popular storage format used in many legacy applications and some modern ones. Examples include: Microsoft Office 97–2003 documents (.DOC, .DOT, .XLS, .XLT, .PPT, .POT, PUB, .VSD, .MPP, .MSG) Macros in Office 2007+ documents (vbaProject.bin file embedded … Continue reading →

Here is a PowerShell script that utilizes .NET frameworks System.Net.Sockets.Socket to initialize packet capture against selected adapter on the local machine. It utilizes SIO_RCVALL Control Code – Win32 apps | Microsoft Docs to receive all packets passing through a network … Continue reading →

Had an application being debugged with Visual Studio 2019 on Windows 10 21H1. The application itself was consuming nearly no system resources at all, machine was running nice and quick. Fast SSD, more than 16 GB free ram, CPU not … Continue reading →

Here we have a program with the following bad code: When we try to run it reads values which are too large for the variables that are on the stack, and it overwrites the return address on stack, so when … Continue reading →

In analysis of a legacy MS-DOS application’s behavior I was having trouble to get the CPU registers after after a particular DOS API call had completed, which seemed to be behaving differently from any available documentation on the API I … Continue reading →