Udemy – Offensive C# 2022-11

Apr 18, 2025 - 18:07

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The Offensive C# course will teach you from the basics of C# programming to directly calling Windows operating system (WinAPI) functions using C#. C# is a language developed by Microsoft and has a wide range of applications. It allows you to directly access almost all Windows components, including WinAPI. In this course, you will also learn how to build your own command and control (C2) server using Flask as the backend and a C2 agent as the frontend. This server will have features such as client connection management, file explorer, registry explorer, etc. In the future, more features will be added to this server. We will look at how to code a traditional reverse shell using C2 that bypasses Constrained Language Mode by default. Then, we will look at some Privilege Escalation techniques.

Next, we’ll explore Active Directory using C# and build our own automation tools. Tools that automate tasks like Kerberosting, finding DCSync-enabled users, Delegation Attacks, and much more. We’ll write a simple loader that loads .NET executables into memory and executes them. We’ll then explore how to use WinAPI functions in C# and write tools for shellcode injection, DLL injection, debugger probing, backdooring PE executables, and more. We’ll also explore the structure of the PE file format.