What are the requirements for writing a helper DLL for Netsh persistence?

The DLL must export a function named `InitHelperDll` with the signature `DWORD WINAPI InitHelperDll(DWORD dwNetshVersion, PVOID pReserved)`. Inside this function, you can execute arbitrary code—for example, starting `cmd.exe` or loading shellcode. The export can be declared using a `.def` file or with `extern "C" __declspec(dllexport)`. Similar DLL‑based persistence techniques are discussed in Exploitation Analysis of Executing Shellcode via Boolang Language.