Firmware
Firmware security 3: Digging into System management mode (SMM)
In the third part of the series we are going to discuss System management mode (SMM) and it's security. Moreover, We will try to interact with the SMM from our linux system.
Firmware
All low level firmware related stuff. Including internals and security of BIOS/UEFI, SMM, DRAM, ME/AMT etc.
Firmware
Firmware security 1: Playing with PCI device memory
In this part of the series we will go through the basic of PCI devices and their memory. We will be developing linux kernel driver and using chipsec to analyze the data practically.
Intel architecture
Segmentation in Intel x64(IA-32e) architecture - explained using Linux
In this article we will go through Segmentation in basic and cover it for x64 (IA-32e) processors by extracting the details inside a Linux system.
Virtualization
Developing hypervisor from scratch: Part 4 - Setting up HOST and GUEST State
In this article series you are going to learn how to develop your own hypervisor for virtualization in linux ecosystem. In this part we will do the setup of HOST and GUEST state area and at last the vmlaunch.
Virtualization
Developing hypervisor from scratch: Part 3 - Setting up VMCS
In this article series you are going to learn how to develop your own hypervisor for virtualization in linux ecosystem. In this part we will do the setup of VMCS structure.
Virtualization
Developing hypervisor from scratch: Part 2 - VMXON Operation
In this article series you are going to learn how to develop your own hypervisor for virtualization in linux ecosystem. In this part we will execute VMXON operation.
Virtualization
Developing hypervisor from scratch: Part 1 - Intro and Setup
In this article series you are going to learn how to develop your own hypervisor for virtualization in linux ecosystem. Also this series will help to learn low level virtualization.
Firmware
Getting processor information using cpuid instruction and inline assembly
cpuid is a processor specific instruction used to get processor's information and features. In this post we are going to learn how to extract those information using inline assembly in c.
Reverse engineering
What's at 1st sector/MBR of hard disk(MBR Forensics)
MBR have lots of details about the hard disk or other storage disk which can be used for forensics purposes. In this article we will analyze the MBR's 512 bytes of data and try to interpret it.
Firmware
Analyse default BIOS protection of your system against LoJax: UEFI rootkit
LoJax is first rootkit in the wild that try to write a UEFI module into system's SPI Flash Memory. You can analyse your system's default BIOS/UEFI protection against such malware which we will discuss in this article.
Firmware
Replace your proprietary bios with linux firmware
Intel system comes with UEFI, UEFI is a proprietary and closed-source operating system that can be exploited.NERF (Non-Extensible Reduced Firmware), an open source software system developed at Google can replace almost all of UEFI firmware with a tiny Linux kernel and initramfs.
Linux
How to boot linux iso without usb on corrupted bios of lenovo laptops
Grub2 have the capability to boot directly from iso file present in any of your hard drive storage. Using this feature most Linux distributions as well as popular rescue CDs can be booted directly from an ISO file.