MemoryModule

☘️ A tool to parse and load module in memory, as well as attach a DLL in EXE. Most of the functions are inline, so that it can also be used in shellcode.

compatible list:

Now you don't need to use python to compile all of them, just use pre generated shellcode.
Also it support cross-compile on linux such as codespaces.

Compile

compile on windows

You can use clang, gcc or tcc and msvc (visual studio 2019)to compile,

here's a example for using clang to compile.

git clone https://github.com/YuriSizuku/MemoryModule.git --recursive
cd ./MemoryModule/src/memdll
make winpe_shellcode # only if you want to generate ths shellcode
make ARCH=i686  # x86 release
make ARCH=x86_64 # x64 release 
make ARCH=i686 DEBUG=1 # x86 debug
make ARCH=x86_64 DEBUG=1 # x64 debug

compile on linux

You can also use mingw to compile on linux without generating shellcode by python.

sudo apt-get install mingw-w64
git clone https://github.com/YuriSizuku/MemoryModule.git --recursive
cd ./MemoryModule/src/memdll
make ARCH=i686 CC=i686-w64-mingw32-gcc # mingw x86 release
make ARCH=x86_64 CC=x86_64-w64-mingw32-gcc # mingw x64 release

If you want to develop on codespaces, here's the c_cpp_properties.json on vscode.

{
    "configurations": [
        {
            "name": "Linux",
            "includePath": [
                "${workspaceFolder}/**",
                "${workspaceFolder}/util/include/**"
            ],
            "defines": ["WINPE_IMPLEMENTATION", "WINPE_NOASM"],
            "compilerPath": "/usr/bin/i686-w64-mingw32-gcc",
            "cStandard": "c99",
            "cppStandard": "c++11",
            "intelliSenseMode": "windows-gcc-x86"
        }
    ],
    "version": 4
}

Usage

load DLL in memory

const char *dllpath = "test.dll";
size_t mempesize = 0;
void *memdll = NULL;

// load the pe file in memory and align it to memory align
void *mempe = winpe_memload_file(dllpath, &mempesize, TRUE); 

// memory loadlibrary
memdll = winpe_memLoadLibrary(mempe);
winpe_memFreeLibrary(memdll);

// memory loadlibrary at specific address
size_t targetaddr = sizeof(size_t) > 4 ? 0x140030000: 0x90000;
memdll = winpe_memLoadLibraryEx(mempe, targetaddr, 
    WINPE_LDFLAG_MEMALLOC, (PFN_LoadLibraryA)winpe_findloadlibrarya(), 
    (PFN_GetProcAddress)winpe_memGetProcAddress);
winpe_memFreeLibrary(memdll);
free(mempe);

attach DLL in exe

win_injectmemdll.exe exepath dllpath [outpath]

MemoryModule API

These functions are essential to load memory module in windows.

/*
  similar to LoadlibrayA, will call dllentry
  will load the mempe in a valid imagebase
    return hmodule base
*/
inline void* STDCALL winpe_memLoadLibrary(void *mempe);

/*
  if imagebase==0, will load on mempe, or in imagebase
  will load the mempe in a valid imagebase, flag as below:
    WINPE_LDFLAG_MEMALLOC 0x1, will alloc memory to imagebase
    WINPE_LDFLAG_MEMFIND 0x2, will find a valid space, 
        must combined with WINPE_LDFLAG_MEMALLOC
    return hmodule base
*/
inline void* STDCALL winpe_memLoadLibraryEx(void *mempe, 
    size_t imagebase, DWORD flag,
    PFN_LoadLibraryA pfnLoadLibraryA, 
    PFN_GetProcAddress pfnGetProcAddress);

/*
   similar to FreeLibrary, will call dllentry
     return true or false
*/
inline BOOL STDCALL winpe_memFreeLibrary(void *mempe);

/*
   FreeLibraryEx with VirtualFree custom function
     return true or false
*/
inline BOOL STDCALL winpe_memFreeLibraryEx(void *mempe, 
    PFN_LoadLibraryA pfnLoadLibraryA, 
    PFN_GetProcAddress pfnGetProcAddress);

/*
   similar to GetProcAddress
     return function va
*/
inline PROC STDCALL winpe_memGetProcAddress(
    void *mempe, const char *funcname);

// mempe internal functions
/*
  load the origin rawpe in memory buffer by mem align
    return memsize
*/
inline size_t winpe_memload(const void *rawpe, size_t rawsize, 
    void *mempe, size_t memsize, bool_t same_align);


/*
  realoc the addrs for the mempe addr as image base
    return realoc count
*/
inline size_t winpe_memreloc(void *mempe, size_t newimagebase);

/*
  load the iat for the mempe
    return iat count
*/
inline size_t winpe_membindiat(void *mempe, 
    PFN_LoadLibraryA pfnLoadLibraryA, 
    PFN_GetProcAddress pfnGetProcAddress);

/*
  exec the tls callbacks for the mempe, before dll oep load
  reason is for function PIMAGE_TLS_CALLBACK
    return tls count
*/
inline size_t winpe_membindtls(void *mempe, DWORD reason);

See winpe.h for parsing and loading PE structure in detail.

Known issues

attach x64 DLL to exe crash on calling some windows API problem occured by movaps xmm0, xmmword ptr ss:[rsp] fixed by stack memory align with 0x10

Todo

TLS initialize support, finished, but not tested, because I didn't find DLL with TLS example.
support ASLR finished

jyotidwi/MemoryModule