int main() unsigned char shellcode[] = /* paste shellcode here */ ;

...you are likely looking at reflective PE injection.

: A loader is written to inject this shellcode into a target process (like explorer.exe ) using APIs such as WriteProcessMemory and CreateRemoteThread . 4. Security Implications and EDR Bypass

In the world of software, an executable (EXE) is like a packaged meal: it comes with a box (the file header), instructions (the metadata), and the food itself (the machine code). While this package is convenient for standard operating systems, it is bulky. In the realm of cybersecurity, sometimes you need to skip the packaging and deliver the "food" directly. This is where shellcode comes in.