#include <Windows.h>

int main()
{
  // Open the registry key where the malware will be hidden
  HKEY hKey;
  RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\MyMalware", 0, KEY_WRITE, &hKey);
  
  // Create a new value in the registry key to store the malware
  DWORD dwValue = 1;
  RegSetValueEx(hKey, "HiddenValue", 0, REG_DWORD, (LPBYTE)&dwValue, sizeof(dwValue));
  
  // Close the registry key
  RegCloseKey(hKey);
  
  // Return success
  return 0;
}