What is a CTF
CTFtime
About CTF
OverTheWire
Pwnable.kr
HackerFire
PwnAdventure 3
Pwnable.tw
PwnCollege
Wargame Nexus
GDB Tutorial 1
GDB Tutorial 2
pwndbg
pwntools
GDB
AS
GCC
Intel 64 and IA-32 Architectures Software Developer
AMD64 Architecture Programmer’s Manual (vol1, vol2, vol3, vol4)
Phrack Magazine
The Shellcoder’s Handbook: Discovering and Exploiting Security Holes
The Web Application Hacker’s Handbook: Finding and Exploiting Security Flaws
Intel Architecture Software Developer Manuals