[C++] Inject Into a Running Process

With following code you can make an injector for running processes, it means the injector can work in a background thread and inject whenever the user starts the game from anywhere (ie ASE).

BOOL InjectIntoProcess(TCHAR* szExeName, TCHAR* szDllName) 

{ 

    TCHAR szProcessName[MAX_PATH]; 

    TCHAR szDllNameAndPath[MAX_PATH]; 

    DWORD aProcesses[1024], cb, cProcesses; 

    HANDLE hProcess = NULL; 

    HMODULE hMod = NULL; 

    UINT i = 0; 



    // Get the full path to the DLL for later use 

    GetCurrentDirectory(MAX_PATH, szDllNameAndPath); 

    wcscat(szDllNameAndPath, _T("\\")); 

    wcscat(szDllNameAndPath, szDllName); 



    // Get the list of process identifiers 

    if(!EnumProcesses(aProcesses, sizeof(aProcesses), &cb)) 

        return FALSE; 



    // Calculate how many process identifiers were returned 

    cProcesses = cb / sizeof(DWORD); 



    // Get the name and process identifier for each process 

    for(i = 0; i < cProcesses; i++) 

    { 

        hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, aProcesses[i]); 



        if(hProcess) 

        { 

            if(EnumProcessModules(hProcess, &hMod, sizeof(hMod), &cb)) 

            { 

                GetModuleBaseNameW(hProcess, hMod, szProcessName, sizeof(szProcessName)/sizeof(TCHAR)); 

            } 



            if(wcscmp(wcslwr(szProcessName), szExeName) == 0) 

            { 

                // We found the process, inject our DLL 

                if(DetourContinueProcessWithDllW(hProcess, szDllNameAndPath)) 

                { 

                    return TRUE; 

                } 

            } 

        } 

         

        CloseHandle(hProcess); 

    } 



    return FALSE; 

} 

Now we can inject a DLL as easily as this:

  if(InjectIntoProcess(_T("et.exe"), _T("hax.dll"))) 

    { 

        _tprintf(_T("Injection successful!\n")); 

    } 

    else { 

        _tprintf(_T("Injection failed.\n")); 

    } 

And you can use a loop to check when to inject.

by Sinner