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Professionally Evil Fundamentals: Introduction

Linux X86 Assembly – How to Make Our Hello World Usable as an Exploit Payload

| | analysis, Application Security, architecture, ASM, call, cpu, exit, gas, Hello World, int, jmp, Linux, mov, objdump, optimize, payload, Penetration Testing, PoP, Professionally Evil, programming, push, Registers, Reverse Engineering, Secure Ideas, shellcode, syscalls, training, write, x86, xchg, xor
Overview In the last two tutorials, we built a Hello World program in NASM and GAS for x86 assembly.  While this can help us learn x86 assembly, it isn’t viable as a ...
Professionally Evil Insights
Professionally Evil Fundamentals: Introduction

Linux X86 Assembly – How to Build a Hello World Program in NASM

| | analysis, Application Security, architecture, ASM, C++, cpu, exit, Hello World, int, Linux, mov, NASM, payload, Penetration Testing, Professionally Evil, programming, Registers, Reverse Engineering, Secure Ideas, shellcode, syscalls, write, x86
Overview A processor understands bytecode instructions specific to that architecture.  We as humans use mnemonics to make building these instructions easier than remembering a bunch of binary codes.  These mnemonics are known ...
Professionally Evil Insights
Professionally Evil Fundamentals: Introduction

A Hacker’s Tour of the X86 CPU Architecture

| | analysis, Apple, architecture, ARM, cpu, eflags, Endian, M1, payload, Penetration Testing, Professionally Evil, Registers, Reverse Engineering, Reviews, Secure Ideas, segments, shellcode, x86
Overview The Intel x86 CPU architecture is one of the most prolific CPU architectures for desktops, laptops, and servers.  While other architectures exist and are even taking some market share with mobile ...
Professionally Evil Insights
Registers

Registers

| | Registers
Introduction This article will define three key types of registers in the x86 architecture and then go on to show simulations of registers’ contents after specific instructions have been run. This... Go ...
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