Execute an exe in same process Java

[CodeExplorer]

Hi guys and gals. I wanna execute an exe inside same process with Java code.
Hopefully someone will give some advices , I am not familiarly not even with executing exes from native code.
So first I have to use LoadLibrary of the exe, then what?
From what I've read on https://stackoverflow.com/questions/44912/java-delegates
I'm fornicated since there are no delegates on Java!
 

[CodeExplorer]

Solved a part of problems, I've used com.sun.jna.win32-x86 and the fallowing code:
 

   Path path = Paths.get(jTextField1.getText());
   byte[] data = Files.readAllBytes(path);
   int EPrva = GetEntryPointRva(data);
   
   HANDLE handle = ClassReaderWriter.mainprogram.Kernel32.INSTANCE.LoadLibraryA(jTextField1.getText());

    Pointer pointer = new Pointer(handle.getPointer().peer+EPrva);
    Function func = new Function(pointer, 0);
    func.invokeVoid(new Object[]{});

It throws and exception but only because imports are not fixed and dwords are not re-based.
A lot of work to do.
Does anyone know a good import table parser/fixer on C++ so I would convert it to Java?
 

[CodeExplorer]

Finded a good solution for preserving default ImageBase:
 

    public static boolean WasPersevedSpace = false;
    
    public static void ExecuteItself()
    {
ClassReaderWriter.mainprogram.Kernel32.MemoryBasicInformation mb = new 
ClassReaderWriter.mainprogram.Kernel32.MemoryBasicInformation();

Pointer ba_pointer = new Pointer(0x0400000);  // standard image base
ClassReaderWriter.mainprogram.Kernel32.INSTANCE.VirtualQuery(
ba_pointer, mb, mb.size());

if (mb.RegionSize.longValue()>10*1024*1024)  // if we have at last 10 MB
{
WasPersevedSpace = true;
return;
}

        ProcessInformation processInformation = new ProcessInformation();
        
        StartupInfoA startupInfo = new StartupInfoA();
        // startupInfo.dwFlags = CREATE_SUSPENDED;
        //startupInfo.wShowWindow = SW_HIDE;

        boolean ok = Kernel32.INSTANCE.CreateProcessA("D:\\HonorableNetPatcher.exe", null
                , null
                , null
                , true
                , CREATE_SUSPENDED
                , null
                , "C:\\Windows\\System32\\"
                , startupInfo
                , processInformation);

        Pointer global_alloc = ClassReaderWriter.mainprogram.Kernel32.INSTANCE.VirtualAllocEx(
        processInformation.hProcess,
        ba_pointer,
        15*1024*1024,  // 15 MB reserved
        ClassReaderWriter.mainprogram.Kernel32.MEM_RESERVE,
        ClassReaderWriter.mainprogram.Kernel32.PAGE_EXECUTE_READWRITE);

ClassReaderWriter.mainprogram.Kernel32.INSTANCE.ResumeThread(processInformation.hThread);

    }

So in this way we reserve 15 MB of space at default ImageBase: 0400000
I've found an article: https://www.joachim-bauch.de/tutorials/loading-a-dll-from-memory/comment-page-1/
But how do we get current process name and current process parameters???
A proper import table fixer in C++ still to be found, the one from article I've posted is silly!
 

Edited December 9, 2017 by CodeCracker