static
VOID
TestGetModuleFileNameA(VOID)
{
CHAR Buffer[MAX_PATH];
DWORD Length;
BOOL Relative;
Length = GetModuleFileNameA(NULL, Buffer, sizeof(Buffer));
ok(Length != 0, "Length = %lu\n", Length);
ok(Length < sizeof(Buffer), "Length = %lu\n", Length);
ok(Buffer[Length] == 0, "Buffer not null terminated\n");
Relative = PathIsRelativeA(Buffer);
ok(Relative == FALSE, "GetModuleFileNameA returned relative path: %s\n", Buffer);
}
/// Test if the path is relative or absolute
bool Path::isRelativePath()
{
#ifdef PARABOLA_WINDOWS
// on windows, special handling
if(PathIsRelativeA(m_path.c_str())){
return true;
}
#else
// for every other non windows system, the slash defines an absolute path
if(!m_path.empty() && m_path[0] == '/')
{
return true;
}
#endif
return false;
};
int thcrap_inject_into_running(HANDLE hProcess, const char *run_cfg_fn)
{
int ret = -1;
HMODULE inj_mod = NULL;
if(GetModuleHandleEx(
GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT | GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
(LPTSTR)thcrap_inject_into_running,
&inj_mod
)) {
size_t cur_dir_len = GetCurrentDirectory(0, NULL) + 1;
size_t inj_dir_len = GetModuleFileNameU(inj_mod, NULL, 0) + 1;
VLA(char, inj_dll, inj_dir_len);
VLA(char, inj_dir, inj_dir_len);
STRLEN_DEC(run_cfg_fn);
size_t param_len = cur_dir_len + run_cfg_fn_len;
VLA(char, abs_run_cfg_fn, param_len);
const char *param;
GetModuleFileNameU(inj_mod, inj_dir, inj_dir_len);
strncpy(inj_dll, inj_dir, inj_dir_len);
PathRemoveFileSpec(inj_dir);
PathAddBackslashA(inj_dir);
// Allow for relative directory names
if(PathIsRelativeA(run_cfg_fn)) {
GetCurrentDirectory(cur_dir_len, abs_run_cfg_fn);
PathAppendA(abs_run_cfg_fn, run_cfg_fn);
param = abs_run_cfg_fn;
} else {
param = run_cfg_fn;
param_len = run_cfg_fn_len;
}
ret = Inject(hProcess, inj_dir, inj_dll, "thcrap_init", param, param_len);
VLA_FREE(abs_run_cfg_fn);
VLA_FREE(inj_dir);
VLA_FREE(inj_dll);
}
return ret;
}
bool FullPathFromPath(std::string* path, const std::string& in_path)
{
if (PathIsRelativeA(in_path.c_str()))
{
std::unique_ptr<char[]> buffer(new char[MAX_PATH]);
if (GetModuleFileNameA(CurrentModule(), buffer.get(), MAX_PATH) &&
PathRemoveFileSpecA(buffer.get()))
{
PathAppendA(buffer.get(), in_path.c_str());
*path = buffer.get();
}
}
else
{
*path = in_path;
}
if (FileExist(*path))
return true;
return false;
}
/*************************************************************************
* PathIsRelative [SHELL32.40]
*/
BOOL WINAPI PathIsRelativeAW (LPCVOID lpszPath)
{
if (SHELL_OsIsUnicode())
return PathIsRelativeW( lpszPath );
return PathIsRelativeA( lpszPath );
}
int Inject(HANDLE hProcess, const char *dll_dir, const char *dll_fn, const char *func_name, const void *param, const size_t param_size)
{
// String constants
const char *injectError1Format =
"Could not inject %s.\n"
"\n"
"If you're running Windows Vista or 7, make sure that you have installed the KB2533623 update:\n"
"\n"
"\thttp://support.microsoft.com/kb/2533623/";
const char *injectError2Format = "Could not load the function: %s";
//------------------------------------------//
// Function variables. //
//------------------------------------------//
// Main DLL we will need to load
HMODULE kernel32 = GetModuleHandleA("kernel32.dll");
// Main functions we will need to import.
// If [dll_fn] is absolute, LoadLibraryEx() with the LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR
// flag is used to guarantee that the injected DLL and its dependencies really
// are only loaded from the given directory. Otherwise, LoadLibrary() may load
// a possible other DLL with the same name from the directory of [hProcess].
FARPROC getcurrentdirectory = GetProcAddress(kernel32, "GetCurrentDirectoryW");
FARPROC setcurrentdirectory = GetProcAddress(kernel32, "SetCurrentDirectoryW");
FARPROC loadlibrary = GetProcAddress(kernel32, "LoadLibraryW");
FARPROC loadlibraryex = GetProcAddress(kernel32, "LoadLibraryExW");
FARPROC getprocaddress = GetProcAddress(kernel32, "GetProcAddress");
FARPROC exitthread = GetProcAddress(kernel32, "ExitThread");
FARPROC freelibraryandexitthread = GetProcAddress(kernel32, "FreeLibraryAndExitThread");
int have_kb2269637 = GetProcAddress(kernel32, "SetDefaultDllDirectories") != 0;
// The workspace we will build the codecave on locally.
// workspaceSize gets incremented with the final length of the error strings.
size_t workspaceSize = 2048;
LPBYTE workspace = NULL;
LPBYTE p = NULL;
// The memory in the process we write to
LPBYTE codecaveAddress = NULL;
// Strings we have to write into the process
size_t injectError1_len = _scprintf(injectError1Format, dll_fn) + 1;
size_t injectError2_len = _scprintf(injectError2Format, func_name) + 1;
char *injectError0 = "Error";
VLA(char, injectError1, injectError1_len);
VLA(char, injectError2, injectError2_len);
char *user32Name = "user32.dll";
char *msgboxName = "MessageBoxW";
// Placeholder addresses to use the strings
LPBYTE user32NameAddr = 0;
LPBYTE user32Addr = 0;
LPBYTE msgboxNameAddr = 0;
LPBYTE msgboxAddr = 0;
LPBYTE dllAddr = 0;
LPBYTE dllDirAddr = 0;
LPBYTE dllNameAddr = 0;
LPBYTE funcNameAddr = 0;
LPBYTE funcParamAddr = 0;
LPBYTE error0Addr = 0;
LPBYTE error1Addr = 0;
LPBYTE error2Addr = 0;
// Where the codecave execution should begin at
LPTHREAD_START_ROUTINE codecaveExecAddr = 0;
// Handle to the thread we create in the process
HANDLE hThread = NULL;
// Old protection on page we are writing to in the process and the bytes written
DWORD oldProtect = 0;
DWORD byte_ret = 0;
// Return code of injection function
DWORD injRet;
//------------------------------------------//
// Variable initialization. //
//------------------------------------------//
// This section will cause compiler warnings on VS8,
// you can upgrade the functions or ignore them
// Build error messages
sprintf(injectError1, injectError1Format, dll_fn);
sprintf(injectError2, injectError2Format, func_name);
workspaceSize += (
strlen(dll_dir) + 1 + strlen(dll_fn) + 1 + strlen(func_name) + 1 +
param_size + strlen(injectError1) + 1 + strlen(injectError2) + 1
) * sizeof(wchar_t);
// Create the workspace
workspace = (LPBYTE)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, workspaceSize);
p = workspace;
// Allocate space for the codecave in the process
codecaveAddress = (LPBYTE)VirtualAllocEx(hProcess, 0, workspaceSize, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
// Note there is no error checking done above for any functions that return a pointer/handle.
// I could have added them, but it'd just add more messiness to the code and not provide any real
// benefit. It's up to you though in your final code if you want it there or not.
//------------------------------------------//
// Data and string writing. //
//------------------------------------------//
// Reserve space for the user32 dll address, the MessageBox address,
// and the address of the injected DLL's module.
user32Addr = (p - workspace) + codecaveAddress;
p += sizeof(LPBYTE);
msgboxAddr = (p - workspace) + codecaveAddress;
p += sizeof(LPBYTE);
dllAddr = (p - workspace) + codecaveAddress;
p += sizeof(LPBYTE);
// User32 Dll Name
user32NameAddr = (p - workspace) + codecaveAddress;
p = StringToUTF16_advance_dst(p, user32Name);
// MessageBox name
msgboxNameAddr = (p - workspace) + codecaveAddress;
p = memcpy_advance_dst(p, msgboxName, strlen(msgboxName) + 1);
// Directory name
if(dll_dir) {
dllDirAddr = (p - workspace) + codecaveAddress;
p = StringToUTF16_advance_dst(p, dll_dir);
}
// Dll Name
dllNameAddr = (p - workspace) + codecaveAddress;
p = StringToUTF16_advance_dst(p, dll_fn);
// Function Name
funcNameAddr = (p - workspace) + codecaveAddress;
p = memcpy_advance_dst(p, func_name, strlen(func_name) + 1);
// Function Parameter
funcParamAddr = (p - workspace) + codecaveAddress;
p = memcpy_advance_dst(p, param, param_size);
// Error Message 1
error0Addr = (p - workspace) + codecaveAddress;
p = StringToUTF16_advance_dst(p, injectError0);
// Error Message 2
error1Addr = (p - workspace) + codecaveAddress;
p = StringToUTF16_advance_dst(p, injectError1);
// Error Message 3
error2Addr = (p - workspace) + codecaveAddress;
p = StringToUTF16_advance_dst(p, injectError2);
// Pad a few INT3s after string data is written for seperation
*p++ = 0xCC;
*p++ = 0xCC;
*p++ = 0xCC;
// Store where the codecave execution should begin
codecaveExecAddr = (LPTHREAD_START_ROUTINE)((p - workspace) + codecaveAddress);
// For debugging - infinite loop, attach onto process and step over
//*p++ = 0xEB;
//*p++ = 0xFE;
//------------------------------------------//
// User32.dll loading. //
//------------------------------------------//
// User32 DLL Loading
// PUSH 0x00000000 - Push the address of the DLL name to use in LoadLibrary
*p++ = 0x68;
p = ptrcpy_advance_dst(p, user32NameAddr);
// MOV EAX, ADDRESS - Move the address of LoadLibrary into EAX
*p++ = 0xB8;
p = ptrcpy_advance_dst(p, loadlibrary);
// CALL EAX - Call LoadLibrary
*p++ = 0xFF;
*p++ = 0xD0;
// MessageBox Loading
// PUSH 0x000000 - Push the address of the function name to load
*p++ = 0x68;
p = ptrcpy_advance_dst(p, msgboxNameAddr);
// Push EAX, module to use in GetProcAddress
*p++ = 0x50;
// MOV EAX, ADDRESS - Move the address of GetProcAddress into EAX
*p++ = 0xB8;
p = ptrcpy_advance_dst(p, getprocaddress);
// CALL EAX - Call GetProcAddress
*p++ = 0xFF;
*p++ = 0xD0;
// MOV [ADDRESS], EAX - Save the address to our variable
*p++ = 0xA3;
p = ptrcpy_advance_dst(p, msgboxAddr);
//------------------------------------------//
// Injected dll loading. //
//------------------------------------------//
/*
// This is the way the following assembly code would look like in C/C++
// In case the injected DLL depends on other DLLs,
// we need to change the current directory to the one given as parameter
if(dll_dir) {
size_t cur_dir_len = GetCurrentDirectory(0, NULL) + 1;
VLA(wchar_t, cur_dir, cur_dir_len);
GetCurrentDirectory(cur_dir, cur_dir_len);
SetCurrentDirectory(dll_dir);
}
// Load the injected DLL into this process
HMODULE h = LoadLibraryEx(dll_fn, NULL, LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR);
if(!h) {
MessageBox(0, injectError1, "Error", MB_ICONERROR);
ExitThread(1);
}
if(dll_dir) {
SetCurrentDirectory(cur_dir);
}
// Get the address of the export function
FARPROC p = GetProcAddress(h, func_name);
if(!p) {
MessageBox(0, injectError2, "Error", MB_ICONERROR);
FreeLibraryAndExitThread(h, 2);
}
// So we do not need a function pointer interface
__asm call p
// Exit the thread so the loader continues
ExitThread(0);
*/
// DLL Loading
if(dllDirAddr) {
// Registers:
// ebp: Base stack frame
// esi: GetCurrentDirectory / SetCurrentDirectory
// ebx: Current directory of process (on stack)
// ecx: byte length of string at ebx
// mov ebp, esp - Save stack frame
*p++ = 0x89;
*p++ = 0xe5;
// Get length for current directory
// push 0
// push 0
*p++ = 0x6a;
*p++ = 0x00;
*p++ = 0x6a;
*p++ = 0x00;
// mov esi, GetCurrentDirectory
*p++ = 0xbe;
p = ptrcpy_advance_dst(p, getcurrentdirectory);
// call esi
*p++ = 0xFF;
*p++ = 0xD6;
/// Calculate byte size of directory buffer.
/// Also do some poor man's DWORD boundary alignment
/// in order to not f**k up the stack
// mov ecx, eax
// shl ecx, 1
// and ecx, fffffff8
// add ecx, 4
*p++ = 0x89;
*p++ = 0xc1;
*p++ = 0xd1;
*p++ = 0xe1;
*p++ = 0x83;
*p++ = 0xe1;
*p++ = 0xf8;
*p++ = 0x83;
*p++ = 0xc1;
*p++ = 0x04;
/// "Allocate" ecx bytes on stack and store buffer pointer to ebx
// sub esp, ecx
// mov ebx, esp
*p++ = 0x29;
*p++ = 0xcc;
*p++ = 0x89;
*p++ = 0xe3;
/// Call GetCurrentDirectory
// push ebx
// push eax
// call esi
*p++ = 0x53;
*p++ = 0x50;
*p++ = 0xff;
*p++ = 0xd6;
/// PUSH 0x00000000 - Push the address of our directory
*p++ = 0x68;
p = ptrcpy_advance_dst(p, dllDirAddr);
// mov esi, SetCurrentDirectory
*p++ = 0xbe;
p = ptrcpy_advance_dst(p, setcurrentdirectory);
// call esi
*p++ = 0xFF;
*p++ = 0xD6;
}
if(PathIsRelativeA(dll_fn) || !have_kb2269637) {
// PUSH 0x00 (dwFlags = 0)
*p++ = 0x6a;
*p++ = 0x00;
} else {
// PUSH 0x00000900 (dwFlags = LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR | LOAD_LIBRARY_SEARCH_SYSTEM32)
*p++ = 0x68;
*p++ = 0x00;
*p++ = 0x09;
*p++ = 0x00;
*p++ = 0x00;
}
// PUSH 0x00 (hFile = NULL)
*p++ = 0x6a;
*p++ = 0x00;
// PUSH 0x00000000 - Push the address of the DLL name to use in LoadLibraryEx
*p++ = 0x68;
p = ptrcpy_advance_dst(p, dllNameAddr);
// MOV EAX, ADDRESS - Move the address of LoadLibraryEx into EAX
*p++ = 0xB8;
p = ptrcpy_advance_dst(p, loadlibraryex);
// CALL EAX - Call LoadLibraryEx
*p++ = 0xFF;
*p++ = 0xD0;
// mov edi, eax - Save return value
*p++ = 0x89;
*p++ = 0xc7;
if(dllDirAddr) {
/// Reset directory to the original one of the process
// push ebx
// call esi
*p++ = 0x53;
*p++ = 0xFF;
*p++ = 0xD6;
/// Reset stack frame
// mov esp, ebp
*p++ = 0x89;
*p++ = 0xec;
}
// Error Checking
// CMP EDI, 0
*p++ = 0x83;
*p++ = 0xFF;
*p++ = 0x00;
// JNZ EIP + 0x1E to skip over eror code
*p++ = 0x75;
*p++ = 0x1E;
// Error Code 1
// MessageBox
// PUSH 0x10 (MB_ICONHAND)
*p++ = 0x6A;
*p++ = 0x10;
// PUSH 0x000000 - Push the address of the MessageBox title
*p++ = 0x68;
p = ptrcpy_advance_dst(p, error0Addr);
// PUSH 0x000000 - Push the address of the MessageBox message
*p++ = 0x68;
p = ptrcpy_advance_dst(p, error1Addr);
// Push 0
*p++ = 0x6A;
*p++ = 0x00;
// MOV EAX, [ADDRESS] - Move the address of MessageBox into EAX
*p++ = 0xA1;
p = ptrcpy_advance_dst(p, msgboxAddr);
// CALL EAX - Call MessageBoxW
*p++ = 0xFF;
*p++ = 0xD0;
// ExitThread
// PUSH 1
*p++ = 0x6A;
*p++ = 0x01;
// MOV EAX, ADDRESS - Move the address of ExitThread into EAX
*p++ = 0xB8;
p = ptrcpy_advance_dst(p, exitthread);
// CALL EAX - Call ExitThread
*p++ = 0xFF;
*p++ = 0xD0;
// Now we have the address of the injected DLL, so save the handle
// MOV [ADDRESS], EAX - Save the address to our variable
*p++ = 0x89;
*p++ = 0x3D;
p = ptrcpy_advance_dst(p, dllAddr);
// Load the initilize function from it
// PUSH 0x000000 - Push the address of the function name to load
*p++ = 0x68;
p = ptrcpy_advance_dst(p, funcNameAddr);
// Push EDI - module to use in GetProcAddress
*p++ = 0x57;
// MOV EAX, ADDRESS - Move the address of GetProcAddress into EAX
*p++ = 0xB8;
p = ptrcpy_advance_dst(p, getprocaddress);
// CALL EAX - Call GetProcAddress
*p++ = 0xFF;
*p++ = 0xD0;
// Error Checking
// CMP EAX, 0
*p++ = 0x83;
*p++ = 0xF8;
*p++ = 0x00;
// JNZ EIP + 0x23 to skip eror code
*p++ = 0x75;
*p++ = 0x23;
// Error Code 2
// MessageBox
// PUSH 0x10 (MB_ICONHAND)
*p++ = 0x6A;
*p++ = 0x10;
// PUSH 0x000000 - Push the address of the MessageBox title
*p++ = 0x68;
p = ptrcpy_advance_dst(p, error0Addr);
// PUSH 0x000000 - Push the address of the MessageBox message
*p++ = 0x68;
p = ptrcpy_advance_dst(p, error2Addr);
// Push 0
*p++ = 0x6A;
*p++ = 0x00;
// MOV EAX, ADDRESS - Move the address of MessageBox into EAX
*p++ = 0xA1;
p = ptrcpy_advance_dst(p, msgboxAddr);
// CALL EAX - Call MessageBoxA
*p++ = 0xFF;
*p++ = 0xD0;
// FreeLibraryAndExitThread
// PUSH 2
*p++ = 0x6A;
*p++ = 0x02;
// PUSH 0x000000 - Push the injected DLL's module handle
*p++ = 0x68;
p = ptrcpy_advance_dst(p, dllAddr);
// MOV EAX, ADDRESS - Move the address of FreeLibraryAndExitThread into EAX
*p++ = 0xB8;
p = ptrcpy_advance_dst(p, freelibraryandexitthread);
// CALL EAX - Call ExitThread function
*p++ = 0xFF;
*p++ = 0xD0;
// PUSH 0x000000 - Push the address of the function parameter
*p++ = 0x68;
p = ptrcpy_advance_dst(p, funcParamAddr);
// CALL EAX - Call [func_name]
*p++ = 0xFF;
*p++ = 0xD0;
// If we get here, [func_name] has been called,
// so it's time to close this thread and optionally unload the DLL.
//------------------------------------------//
// Exiting from the injected dll. //
//------------------------------------------//
// Call ExitThread to leave the DLL loaded
#if 1
// PUSH 0 (exit code)
*p++ = 0x6A;
*p++ = 0x00;
// MOV EAX, ADDRESS - Move the address of ExitThread into EAX
*p++ = 0xB8;
p = ptrcpy_advance_dst(p, exitthread);
// CALL EAX - Call ExitThread
*p++ = 0xFF;
*p++ = 0xD0;
#endif
// Call FreeLibraryAndExitThread to unload DLL
#if 0
// Push 0 (exit code)
*p++ = 0x6A;
*p++ = 0x00;
// PUSH [0x000000] - Push the address of the DLL module to unload
*p++ = 0xFF;
*p++ = 0x35;
p = ptrcpy_advance_dst(p, dllAddr);
// MOV EAX, ADDRESS - Move the address of FreeLibraryAndExitThread into EAX
*p++ = 0xB8;
p = ptrcpy_advance_dst(p, freelibraryandexitthread);
// CALL EAX - Call FreeLibraryAndExitThread
*p++ = 0xFF;
*p++ = 0xD0;
#endif
//------------------------------------------//
// Code injection and cleanup. //
//------------------------------------------//
// Change page protection so we can write executable code
VirtualProtectEx(hProcess, codecaveAddress, p - workspace, PAGE_EXECUTE_READWRITE, &oldProtect);
// Write out the patch
WriteProcessMemory(hProcess, codecaveAddress, workspace, p - workspace, &byte_ret);
// Restore page protection
VirtualProtectEx(hProcess, codecaveAddress, p - workspace, oldProtect, &oldProtect);
// Make sure our changes are written right away
FlushInstructionCache(hProcess, codecaveAddress, p - workspace);
// Free the workspace memory
HeapFree(GetProcessHeap(), 0, workspace);
// Execute the thread now and wait for it to exit, note we execute where the code starts, and not the codecave start
// (since we wrote strings at the start of the codecave)
hThread = CreateRemoteThread(hProcess, NULL, 0, codecaveExecAddr, 0, 0, NULL);
WaitForSingleObject(hThread, INFINITE);
GetExitCodeThread(hThread, &injRet);
CloseHandle(hThread);
// Free the memory in the process that we allocated
VirtualFreeEx(hProcess, codecaveAddress, 0, MEM_RELEASE);
VLA_FREE(injectError1);
VLA_FREE(injectError2);
return injRet;
}
