Pentester Academy - x86 Assembly Language and Shellcoding on Linux

This course focuses on teaching the basics of 32-bit assembly language for the Intel Architecture (IA-32) family of processors on the Linux platform and applying it to Infosec. Once we are through with the basics, we will look at writing shellcode, encoders, decoders, crypters and other advanced low level applications.

A non-exhaustive list of topics to be covered include:

Computer Architecture Basics
IA-32/64 Family
Compilers, Assemblers and Linkers
CPU Modes and Memory Addressing
Tools of the trade
Nasm, Ld, Objdump, Ndisasm etc.
IA-32 Assembly Language
Registers and Flags
Program Structure for use with nasm
Data Types
Data Movement Instructions
Arithmetic instructions
Reading and Writing from memory
Conditional instructions
Strings and Loops
Interrupts, Traps and Exceptions
Procedures, Prologues and Epilogues
Syscall structure and ABI for Linux
Calling standard library functions
FPU instructions
MMX, SSE, SSE2 etc. instruction sets
Shellcoding on Linux
Execution environment
Exit and Execve shellcode
Bind Shell and Reverse TCP
Staged Shellcode
Egg Hunter
Using 3rd party shellcode
Simulating shellcode
locating syscalls
graphing shellcode execution
Encoders, Decoders and Crypters on Linux
Purpose of encoding and crypting
XOR encoders
Custom encoding
Random sequencing and scrambling
mapping functions
Crypters
Polymorphism
Why polymorphism?
Polymorphic engines
Techniques and Tools