This course focuses on teaching the basics of 64-bit assembly language for the x86_64 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 x86/x86_64 Family Compilers, Assemblers and Linkers CPU Modes and Memory Addressing Tools of the trade Nasm, Ld, Objdump, Ndisasm etc. x86_64 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