## https://sploitus.com/exploit?id=D824386A-B516-5CB3-AC51-ABCE04560F1D
This repository contains a collection of C# code snippets and labs for writing custom backdoor payloads, as part of a workshop presented at Defcon 27. The code covers various topics, including Windows API calls, memory allocation, thread creation, and encryption.
The code snippets are organized into four labs: Lab 1, Lab 2, Lab 3, and Lab 4. Each lab contains multiple code files that demonstrate specific techniques.
Lab 1 focuses on basic Windows API calls, including VirtualAlloc and CreateThread. The code creates a new thread that executes a shellcode payload.
Lab 2 covers more advanced techniques, including the use of the WebClient class to download data from a URL and the creation of a stager. The stager is a small program that downloads and executes a payload from a remote location.
Lab 3 demonstrates the use of the VirtualAlloc and CreateThread functions to allocate memory and create a new thread that executes a shellcode payload.
Lab 4 covers encryption techniques, including XOR and AES encryption. The code encrypts a shellcode payload using a password and then decrypts it using the same password.
The code is written in C# and uses various libraries and frameworks, including the .NET Framework and the Windows API.
Overall