Introduction This is the first post of a series which regards development of malicious software. In this series we will explore and try to implement multiple techniques used by malicious applications to execute code, hide from defenses and persist. Let’s create a C++ application that will run malicious shellcode while trying to not be caught by AV software. Why C++ and not C# or PowerShell script? Because it’s much more difficult to analyze compiled binary when compared to managed code or script. For the purpose of this and following articles we will use MS Visual Studio 2017 or 2019 on Windows 10.