Start with Basic Enumeration
Web Enumeration
Buffer Overflow
Cracking Passwords
Finding and working with public exploits
Linux Reverse Shells
Windows Reverse Shells
Linux Privilege Escalation
Windows Privilege Escalation
Active Directory
Anti-Virus Bypass
Tunneling / Port Forwarding
blank template to write a customer encoder
Resource link dump
Anti-Virus Evasion
Buffer overflow resources
Resources from DEF CON 29