x86 Assembly Language and Shellcoding on Linux

Description

In this course , you will learn:

• 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

Syllabus:

• What is Assembly Language?  
• Setting up the Lab  
• Getting the CPU Info on Linux  
• IA-32 Architecture Basics  
• IA-32 Architecture Exercise  
• CPU Modes and Memory  
• Hello World in Assembly  
• Hello World GDB Exercise  
• Data Types  
• Moving Data  
• Understanding the Stack  
• Arithmetic Operations  
• Multiplication and Division  
• Logical Instructions  
• Control Instructions  
• Loop Exercise  
• Procedures  
• Saving CPU State  String in Assembly  
• Libc and NASM 
• Shellcode Basics  
• Writing Exit Shellcode  
• Hello World Shellcode using JMP-CALL-POP Technique 
• Hello World Shellcode Stack Technique  
• Execve JMP-CALL-POP  
• Execve Shellcode Stack Technique  
• XOR Encoder and Decoder  
• Using Metasploit's Encoders  
• Simple NOT Encoder  
• Insertion Encoder  
• XOR Encoder Decoder using MMX Registers  
• Polymorphism 
• Analyzing 3rd Party Shellcode  
• Analyzing Shellcode with Libemu  
• Writing Custom Crypters  
• SLAE Exam Format