Story Time Exploring the internals of processors has long been a fascination of mine. After spending a lot of time experiencing different processor features like hypervisor and configuring diffe...

This post is a different one, in that, it is more of an overview, rather than a technical post. Here, we provide a high-level summary of HyperDbg Debugger, its principles, and perspective. Intro...

Introduction Hi guys, Welcome to the 8th part of the Hypervisor From Scratch. If you reach here, then you probably finished reading the 7th part, and personally, I believe the 7th part was the ...

Introduction This is the 7th part of the tutorial Hypervisor From Scratch, and it’s about using the Extended Page Table (EPT) in an already running system. As you might know, paging is an essent...

Introduction Welcome to the first part of a series of posts about Exploring & Reversing Windows Concepts and Internals. If you reach here then you’re probably a security researcher or a prog...

Introduction Hi guys, The title of this topic is somehow weird, if you think everything in MSDN is 100% match with what Microsoft implemented in Windows (like what I used to think), you’re defi...

Introduction Hello and welcome to the 6th part of the tutorial Hypervisor From Scratch. In this part, we’ll learn how to virtualize an already running system using our custom-made hypervisor. Li...

As I was surfing the net, trying to find a way to prototype network protocols or features in Linux. I stumbled upon PacketScript. PacketScript is the an implementation of the Lua VM inside Linux...

Have you ever thought how transitions between different rings performed? Well, SYSENTER & SYSCALL used in modern OSs for transitioning between ring 3 to ring 0 but if there are other rings, ...

Introduction Hello and welcome to the fifth part of the “Hypervisor From Scratch” tutorial series. Today we will spend our time studying different parts of Virtual Machine Control Structure (VMC...