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ed550ae6c76f002c1ac4ef0d329670eeb24ea7f4
bb107-MemoryModulePP/MemoryModule/NativeFunctionsInternal.cpp
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Boring ed550ae6c7 1. Add Win10 forward export support 
2. Fixed some bugs
2020-02-22 14:53:26 +08:00

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#include "NativeFunctionsInternal.h"
#include <random>
#pragma warning(disable:6328)
#pragma warning(disable:4267)
#pragma warning(disable:26812)
#ifndef _WIN64
SIZE_T NTAPI _RtlCompareMemory(
const VOID* Source1,
const VOID* Source2,
SIZE_T Length) {
return decltype(&_RtlCompareMemory)(RtlGetNtProcAddress("RtlCompareMemory"))(Source1, Source2, Length);
}
#define RtlCompareMemory _RtlCompareMemory
#endif
#define RTL_VERIFY_FLAGS_MAJOR_VERSION 0
#define RTL_VERIFY_FLAGS_MINOR_VERSION 1
#define RTL_VERIFY_FLAGS_BUILD_NUMBERS 2
#define RTL_VERIFY_FLAGS_DEFAULT RTL_VERIFY_FLAGS_MAJOR_VERSION|RTL_VERIFY_FLAGS_MINOR_VERSION|RTL_VERIFY_FLAGS_BUILD_NUMBERS
static bool NTAPI RtlVerifyVersion(IN DWORD MajorVersion, IN DWORD MinorVersion OPTIONAL, IN DWORD BuildNumber OPTIONAL, IN BYTE Flags) {
DWORD Versions[3];
RtlGetNtVersionNumbers(Versions, Versions + 1, Versions + 2);
if (Versions[0] == MajorVersion &&
((Flags & RTL_VERIFY_FLAGS_MINOR_VERSION) ? Versions[1] == MinorVersion : true) &&
((Flags & RTL_VERIFY_FLAGS_BUILD_NUMBERS) ? Versions[2] == BuildNumber : true))return true;
return false;
}
static bool NTAPI RtlIsWindowsVersionOrGreater(IN DWORD MajorVersion, IN DWORD MinorVersion, IN DWORD BuildNumber) {
DWORD Versions[3];
RtlGetNtVersionNumbers(Versions, Versions + 1, Versions + 2);
if (Versions[0] == MajorVersion) {
if (Versions[1] == MinorVersion) return Versions[2] >= BuildNumber;
else return (Versions[1] > MinorVersion);
}
else return Versions[0] > MajorVersion;
}
static ULONG NTAPI LdrHashEntry(IN const UNICODE_STRING& str, IN bool _xor = true) {
ULONG result = 0;
if (RtlIsWindowsVersionOrGreater(6, 2, 0)) {
RtlHashUnicodeString(&str, TRUE, HASH_STRING_ALGORITHM_DEFAULT, &result);
}
else {
for (USHORT i = 0; i < (str.Length / sizeof(wchar_t)); ++i)
result += 0x1003F * RtlUpcaseUnicodeChar(str.Buffer[i]);
}
if (_xor)result &= (LDR_HASH_TABLE_ENTRIES - 1);
return result;
}
static HANDLE NTAPI RtlFindtLdrpHeap() {
PLIST_ENTRY ListHead, ListEntry;
PLDR_DATA_TABLE_ENTRY CurEntry;
MEMORY_BASIC_INFORMATION mbi{};
static HANDLE result = nullptr;
if (result)return result;
ListHead = &NtCurrentPeb()->Ldr->InLoadOrderModuleList;
ListEntry = ListHead->Flink;
if (ListHead == ListEntry)return result;
CurEntry = CONTAINING_RECORD(ListEntry, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);
NtQueryVirtualMemory(NtCurrentProcess(), CurEntry, MemoryBasicInformation, &mbi, sizeof(mbi), (PSIZE_T)&ListHead);
return result = mbi.AllocationBase;
}
static PLDR_DATA_TABLE_ENTRY NTAPI RtlFindNtdllLdrEntry() {
PLIST_ENTRY ListHead, ListEntry;
static PLDR_DATA_TABLE_ENTRY CurEntry = nullptr;
if (CurEntry)return CurEntry;
ListHead = &NtCurrentPeb()->Ldr->InInitializationOrderModuleList;
ListEntry = ListHead->Flink;
while (ListHead != ListEntry) {
CurEntry = CONTAINING_RECORD(ListEntry, LDR_DATA_TABLE_ENTRY, InInitializationOrderLinks);
ListEntry = ListEntry->Flink;
if (0 == wcsnicmp(CurEntry->BaseDllName.Buffer, L"ntdll.dll", CurEntry->BaseDllName.Length))
return CurEntry;
}
return CurEntry = nullptr;
}
static PLIST_ENTRY NTAPI RtlFindLdrpHashTable() {
static PLIST_ENTRY list = nullptr;
if (list) return list;
PLDR_DATA_TABLE_ENTRY CurEntry = RtlFindNtdllLdrEntry();
if (!CurEntry)return list;
if (CurEntry->HashLinks.Flink == &CurEntry->HashLinks)return list;
list = (decltype(list))((size_t)CurEntry->HashLinks.Flink - LdrHashEntry(CurEntry->BaseDllName) * sizeof(_LIST_ENTRY));
return list;
}
static PVOID NTAPI NtAllocateLdrpHeap(IN size_t size) {
HANDLE heap = RtlFindtLdrpHeap();
if (!heap)return nullptr;
return RtlAllocateHeap(heap, HEAP_ZERO_MEMORY, size);
}
static BOOL NTAPI NtFreeLdrpHeap(IN PVOID buffer) {
HANDLE LdrpHeap = RtlFindtLdrpHeap();
if (!LdrpHeap)return FALSE;
return RtlFreeHeap(LdrpHeap, 0, buffer);
}
static VOID NTAPI NtInitializeListEntry(OUT PLIST_ENTRY entry) {
entry->Blink = entry->Flink = entry;
}
static VOID NTAPI NtInitializeSingleEntry(OUT PSINGLE_LIST_ENTRY entry) {
entry->Next = entry;
}
FORCEINLINE BOOLEAN NTAPI RemoveEntryList(IN PLIST_ENTRY Entry) {
PLIST_ENTRY OldFlink;
PLIST_ENTRY OldBlink;
OldFlink = Entry->Flink;
OldBlink = Entry->Blink;
OldFlink->Blink = OldBlink;
OldBlink->Flink = OldFlink;
return (BOOLEAN)(OldFlink == OldBlink);
}
static WINDOWS_VERSION NTAPI NtWindowsVersion() {
static WINDOWS_VERSION version = null;
DWORD versions[3]{};
if (version)return version;
RtlGetNtVersionNumbers(versions, versions + 1, versions + 2);
switch (versions[0]) {
case 5: {
switch (versions[1]) {
case 1:return version = versions[2] == 2600 ? xp : invalid;
case 2:return version = versions[2] == 3790 ? xp : invalid;
default:break;
}
break;
}
break;
case 6: {
switch (versions[1]) {
case 0: {
switch (versions[2]) {
case 6000:
case 6001:
case 6002:
return version = vista;
default:
break;
}
break;
}
break;
case 1: {
switch (versions[2]) {
case 7600:
case 7601:
return version = win7;
default:
break;
}
break;
}
break;
case 2: {
if (versions[2] == 9200)return version = win8;
break;
}
break;
case 3: {
if (versions[2] == 9600)return version = win8_1;
break;
}
break;
default:
break;
}
break;
}
break;
case 10: {
if (versions[1])break;
switch (versions[2]) {
case 10240:
case 10586: return version = win10;
case 14393: return version = win10_1;
case 15063:
case 16299:
case 17134:
case 17763:
case 18362:return version = win10_2;
default:if (RtlIsWindowsVersionOrGreater(versions[0], versions[1], 15063))return version = win10_2;
break;
}
break;
}
break;
default:
break;
}
return version = invalid;
}
static size_t NTAPI NtLdrDataTableEntrySize() {
static size_t size = 0;
if (size)return size;
switch (NtWindowsVersion()) {
case xp:return size = sizeof(LDR_DATA_TABLE_ENTRY_XP);
case vista:return size = sizeof(LDR_DATA_TABLE_ENTRY_VISTA);
case win7:return size = sizeof(LDR_DATA_TABLE_ENTRY_WIN7);
case win8:return size = sizeof(LDR_DATA_TABLE_ENTRY_WIN8);
case win8_1:return size = sizeof(LDR_DATA_TABLE_ENTRY_WIN8_1);
case win10:return size = sizeof(LDR_DATA_TABLE_ENTRY_WIN10);
case win10_1:return size = sizeof(LDR_DATA_TABLE_ENTRY_WIN10_1);
case win10_2:return size = sizeof(LDR_DATA_TABLE_ENTRY_WIN10_2);
default:return size = sizeof(LDR_DATA_TABLE_ENTRY_WIN10_2);
}
}
static PRTL_BALANCED_NODE NTAPI RtlFindLdrpModuleBaseAddressIndex() {
static PRTL_BALANCED_NODE LdrpModuleBaseAddressIndex = nullptr;
if (LdrpModuleBaseAddressIndex)return LdrpModuleBaseAddressIndex;
PLDR_DATA_TABLE_ENTRY ntdll = RtlFindNtdllLdrEntry();
PLDR_DATA_TABLE_ENTRY_WIN10 nt10 = decltype(nt10)(ntdll);
if (!ntdll || !RtlIsWindowsVersionOrGreater(6, 2, 0))return nullptr;
LdrpModuleBaseAddressIndex = &nt10->BaseAddressIndexNode;
while (LdrpModuleBaseAddressIndex->ParentValue) {
LdrpModuleBaseAddressIndex = decltype(LdrpModuleBaseAddressIndex)(LdrpModuleBaseAddressIndex->ParentValue & (~7));
}
if (LdrpModuleBaseAddressIndex->Red)LdrpModuleBaseAddressIndex = nullptr;
return LdrpModuleBaseAddressIndex;
}
static NTSTATUS NTAPI NtInsertModuleBaseAddressIndexNode(IN PLDR_DATA_TABLE_ENTRY DataTableEntry, IN PVOID BaseAddress) {
static auto LdrpModuleBaseAddressIndex = RtlFindLdrpModuleBaseAddressIndex();
if (!LdrpModuleBaseAddressIndex)return STATUS_UNSUCCESSFUL;
PLDR_DATA_TABLE_ENTRY_WIN8 LdrNode = decltype(LdrNode)((size_t)LdrpModuleBaseAddressIndex - offsetof(LDR_DATA_TABLE_ENTRY_WIN8, BaseAddressIndexNode));
RTL_RB_TREE tree{ LdrpModuleBaseAddressIndex };
bool bRight = false;
const auto i = offsetof(LDR_DATA_TABLE_ENTRY_WIN8, BaseAddressIndexNode);
while (true) {
if (BaseAddress < LdrNode->DllBase) {
if (!LdrNode->BaseAddressIndexNode.Left)break;
LdrNode = decltype(LdrNode)((size_t)LdrNode->BaseAddressIndexNode.Left - offsetof(LDR_DATA_TABLE_ENTRY_WIN8, BaseAddressIndexNode));
}
else if (BaseAddress > LdrNode->DllBase) {
if (!LdrNode->BaseAddressIndexNode.Right) {
bRight = true;
break;
}
LdrNode = decltype(LdrNode)((size_t)LdrNode->BaseAddressIndexNode.Right - offsetof(LDR_DATA_TABLE_ENTRY_WIN8, BaseAddressIndexNode));
}
else {
LdrNode->DdagNode->LoadCount++;
if (RtlIsWindowsVersionOrGreater(10, 0, 0)) {
PLDR_DATA_TABLE_ENTRY_WIN10(LdrNode)->ReferenceCount++;
}
return STATUS_SUCCESS;
}
}
RtlRbInsertNodeEx(&tree, &LdrNode->BaseAddressIndexNode, bRight, &PLDR_DATA_TABLE_ENTRY_WIN8(DataTableEntry)->BaseAddressIndexNode);
return STATUS_SUCCESS;
}
static NTSTATUS NTAPI NtRemoveModuleBaseAddressIndexNode(IN PLDR_DATA_TABLE_ENTRY DataTableEntry) {
static RTL_RB_TREE tree{ RtlFindLdrpModuleBaseAddressIndex() };
if (!tree.Root)return STATUS_UNSUCCESSFUL;
RtlRbRemoveNode(&tree, &PLDR_DATA_TABLE_ENTRY_WIN8(DataTableEntry)->BaseAddressIndexNode);
return STATUS_SUCCESS;
}
static NTSTATUS NTAPI NtFreeDependencies(IN PLDR_DATA_TABLE_ENTRY_WIN8 LdrEntry) {
_LDR_DDAG_NODE* DependentDdgeNode = nullptr;
PLDR_DATA_TABLE_ENTRY_WIN8 ModuleEntry = nullptr;
_LDRP_CSLIST* head = (decltype(head))LdrEntry->DdagNode->Dependencies, *entry = head;
if (!LdrEntry->DdagNode->Dependencies)return STATUS_SUCCESS;
//find all dependencies and free
do {
DependentDdgeNode = entry->Dependent.DependentDdagNode;
if (DependentDdgeNode->Modules.Flink->Flink != &DependentDdgeNode->Modules) RaiseException(-1, EXCEPTION_NONCONTINUABLE, 0, nullptr);
ModuleEntry = decltype(ModuleEntry)((size_t)DependentDdgeNode->Modules.Flink - offsetof(_LDR_DATA_TABLE_ENTRY_WIN8, NodeModuleLink));
if (ModuleEntry->DdagNode != DependentDdgeNode) RaiseException(-1, EXCEPTION_NONCONTINUABLE, 0, nullptr);
if (!DependentDdgeNode->IncomingDependencies) RaiseException(-1, EXCEPTION_NONCONTINUABLE, 0, nullptr);
_LDRP_CSLIST::_LDRP_CSLIST_INCOMMING* _last = DependentDdgeNode->IncomingDependencies, *_entry = _last;
_LDR_DDAG_NODE* CurrentDdagNode;
size_t State = 0, Cookies;
//Acquire LoaderLock
do {
if (!NT_SUCCESS(LdrLockLoaderLock(LOCK_NO_WAIT_IF_BUSY, &State, &Cookies)))
RaiseException(-1, EXCEPTION_NONCONTINUABLE, 0, nullptr);
} while (State != LOCK_STATE_ENTERED);
do {
CurrentDdagNode = (decltype(CurrentDdagNode))((size_t)_entry->IncommingDdagNode & ~1);
if (CurrentDdagNode == LdrEntry->DdagNode) {
//node is head
if (_entry == DependentDdgeNode->IncomingDependencies) {
//only one node in list
if (_entry->NextIncommingEntry == (PSINGLE_LIST_ENTRY)DependentDdgeNode->IncomingDependencies) {
DependentDdgeNode->IncomingDependencies = nullptr;
}
else {
//find the last node in the list
PSINGLE_LIST_ENTRY i = _entry->NextIncommingEntry;
while (i->Next != (PSINGLE_LIST_ENTRY)_entry)i = i->Next;
i->Next = _entry->NextIncommingEntry;
DependentDdgeNode->IncomingDependencies = (_LDRP_CSLIST::_LDRP_CSLIST_INCOMMING*)_entry->NextIncommingEntry;
}
}
//node is not head
else {
_last->NextIncommingEntry = _entry->NextIncommingEntry;
}
break;
}
//save the last entry
if (_last != _entry)_last = (decltype(_last))_last->NextIncommingEntry;
_entry = (decltype(_entry))_entry->NextIncommingEntry;
} while (_entry != _last);
//free LoaderLock
LdrUnlockLoaderLock(0, Cookies);
//free it
LdrUnloadDll(ModuleEntry->DllBase);
NtFreeLdrpHeap(LdrEntry->DdagNode->Dependencies);
//lookup next dependent.
entry = (decltype(entry))entry->Dependent.NextDependentEntry;
LdrEntry->DdagNode->Dependencies = (_LDRP_CSLIST::_LDRP_CSLIST_DEPENDENT*)(entry == head ? nullptr : entry);
} while (entry != head);
return STATUS_SUCCESS;
}
static bool NTAPI NtInitializeLdrDataTableEntry(
OUT PLDR_DATA_TABLE_ENTRY LdrEntry,
IN DWORD dwFlags,
IN PVOID BaseAddress,
IN UNICODE_STRING &DllBaseName,
IN UNICODE_STRING &DllFullName) {
RtlZeroMemory(LdrEntry, NtLdrDataTableEntrySize());
PIMAGE_NT_HEADERS headers = RtlImageNtHeader(BaseAddress);
if (!headers)return false;
bool FlagsProcessed = false;
switch (NtWindowsVersion()) {
case win10:
case win10_1:
case win10_2: {
auto entry = (PLDR_DATA_TABLE_ENTRY_WIN10)LdrEntry;
entry->ReferenceCount = 1;
}
case win8:
case win8_1: {
auto entry = (PLDR_DATA_TABLE_ENTRY_WIN8)LdrEntry;
NtQuerySystemTime(&entry->LoadTime);
entry->OriginalBase = headers->OptionalHeader.ImageBase;
entry->BaseNameHashValue = LdrHashEntry(DllBaseName, false);
entry->LoadReason = LoadReasonDynamicLoad;
if (!NT_SUCCESS(NtInsertModuleBaseAddressIndexNode(LdrEntry, BaseAddress)))return false;
if (!(entry->DdagNode = (decltype(entry->DdagNode))NtAllocateLdrpHeap(sizeof(_LDR_DDAG_NODE))))return false;
//NtInitializeListEntry(&entry->NodeModuleLink);
//NtInitializeListEntry(&entry->DdagNode->Modules);
//NtInitializeSingleEntry(&entry->DdagNode->CondenseLink);
entry->NodeModuleLink.Flink = &entry->DdagNode->Modules;
entry->NodeModuleLink.Blink = &entry->DdagNode->Modules;
entry->DdagNode->Modules.Flink = &entry->NodeModuleLink;
entry->DdagNode->Modules.Blink = &entry->NodeModuleLink;
entry->DdagNode->State = LdrModulesReadyToRun;
entry->DdagNode->LoadCount = 1;
entry->ImageDll = entry->LoadNotificationsSent = entry->EntryProcessed =
entry->InLegacyLists = entry->InIndexes = entry->ProcessAttachCalled = true;
entry->InExceptionTable = !(dwFlags & LOAD_FLAGS_NOT_ADD_INVERTED_FUNCTION);
FlagsProcessed = true;
}
case win7: {
if (NtLdrDataTableEntrySize() == sizeof(LDR_DATA_TABLE_ENTRY_WIN7)) {
auto entry = (PLDR_DATA_TABLE_ENTRY_WIN7)LdrEntry;
entry->OriginalBase = headers->OptionalHeader.ImageBase;
NtQuerySystemTime(&entry->LoadTime);
}
}
case vista: {
if (NtLdrDataTableEntrySize() == sizeof(LDR_DATA_TABLE_ENTRY_VISTA) ||
NtLdrDataTableEntrySize() == sizeof(LDR_DATA_TABLE_ENTRY_WIN7)) {
auto entry = (PLDR_DATA_TABLE_ENTRY_VISTA)LdrEntry;
NtInitializeListEntry(&entry->ForwarderLinks);
NtInitializeListEntry(&entry->StaticLinks);
NtInitializeListEntry(&entry->ServiceTagLinks);
}
}
case xp: {
LdrEntry->DllBase = BaseAddress;
LdrEntry->SizeOfImage = headers->OptionalHeader.SizeOfImage;
LdrEntry->TimeDateStamp = headers->FileHeader.TimeDateStamp;
LdrEntry->BaseDllName = DllBaseName;
LdrEntry->FullDllName = DllFullName;
LdrEntry->EntryPoint = (PVOID)((size_t)BaseAddress + headers->OptionalHeader.AddressOfEntryPoint);
LdrEntry->LoadCount = 1;
if (!FlagsProcessed) LdrEntry->Flags = LDRP_IMAGE_DLL | LDRP_ENTRY_INSERTED | LDRP_ENTRY_PROCESSED | LDRP_PROCESS_ATTACH_CALLED;
NtInitializeListEntry(&LdrEntry->HashLinks);
return true;
}
default:return false;
}
}
static bool NTAPI NtFreeLdrDataTableEntry(IN PLDR_DATA_TABLE_ENTRY LdrEntry) {
switch (NtWindowsVersion()) {
case win10:
case win10_1:
case win10_2:
case win8:
case win8_1: {
auto entry = (PLDR_DATA_TABLE_ENTRY_WIN8)LdrEntry;
NtFreeDependencies(entry);
NtFreeLdrpHeap(entry->DdagNode);
NtRemoveModuleBaseAddressIndexNode(LdrEntry);
}
case win7:
case vista:
case xp: {
NtFreeLdrpHeap(LdrEntry->BaseDllName.Buffer);
NtFreeLdrpHeap(LdrEntry->FullDllName.Buffer);
RemoveEntryList(&LdrEntry->InLoadOrderLinks);
RemoveEntryList(&LdrEntry->InMemoryOrderLinks);
RemoveEntryList(&LdrEntry->InInitializationOrderLinks);
RemoveEntryList(&LdrEntry->HashLinks);
NtFreeLdrpHeap(LdrEntry);
return true;
}
default:return false;
}
}
#define FLAG_REFERENCE 0
#define FLAG_DEREFERENCE 1
static NTSTATUS NTAPI NtUpdateReferenceCount(IN OUT PLDR_DATA_TABLE_ENTRY LdrEntry, IN DWORD Flags) {
if (Flags != FLAG_REFERENCE && Flags != FLAG_DEREFERENCE)return STATUS_INVALID_PARAMETER_2;
switch (NtWindowsVersion()) {
case xp:
case vista:
case win7: {
if (Flags == FLAG_REFERENCE && LdrEntry->LoadCount != 0xffff)
++LdrEntry->LoadCount;
if (Flags == FLAG_DEREFERENCE && LdrEntry->LoadCount)
--LdrEntry->LoadCount;
break;
}
case win8:
case win8_1:
case win10:
case win10_1:
case win10_2: {
auto entry = (PLDR_DATA_TABLE_ENTRY_WIN10)LdrEntry;
if (Flags == FLAG_REFERENCE) {
if (entry->ObsoleteLoadCount != 0xffff)++entry->ObsoleteLoadCount;
if (entry->DdagNode->LoadCount != 0xffffffff)++entry->DdagNode->LoadCount;
}
if (Flags == FLAG_DEREFERENCE) {
if (entry->ObsoleteLoadCount)--entry->ObsoleteLoadCount;
if (entry->DdagNode->LoadCount)--entry->DdagNode->LoadCount;
}
break;
}
default:return STATUS_UNSUCCESSFUL;
}
return STATUS_SUCCESS;
}
static NTSTATUS NTAPI NtGetReferenceCount(IN PLDR_DATA_TABLE_ENTRY LdrEntry, OUT PULONG Count) {
switch (NtWindowsVersion()) {
case xp:
case vista:
case win7: {
*Count = LdrEntry->LoadCount;
break;
}
case win8:
case win8_1:
case win10:
case win10_1:
case win10_2: {
auto entry = (PLDR_DATA_TABLE_ENTRY_WIN8)LdrEntry;
*Count = entry->DdagNode->LoadCount == entry->ObsoleteLoadCount ? entry->ObsoleteLoadCount : entry->DdagNode->LoadCount;
break;
}
default:return STATUS_UNSUCCESSFUL;
}
return STATUS_SUCCESS;
}
static bool NTAPI NtResolveDllNameUnicodeString(
IN PCWSTR DllName OPTIONAL, IN PCWSTR DllFullName OPTIONAL,
OUT PUNICODE_STRING BaseDllName, OUT PUNICODE_STRING FullDllName) {
std::random_device random;
size_t Length = 0;
size_t FullLength = 0;
PWSTR _DllName = nullptr, _DllFullName = _DllName;
bool result = false;
if (DllName) {
bool add = false;
if ((Length = wcslen(DllName)) <= 4 || wcsnicmp(DllName + Length - 4, L".dll", 4)) {
add = true;
Length += 4;
}
_DllName = new wchar_t[++Length];
wcscpy(_DllName, DllName);
if (add)wcscat(_DllName, L".DLL");
}
else {
Length = 16 + 4 + 1; //hex(ULONG64) + ".dll" + '\0'
_DllName = new wchar_t[Length];
swprintf(_DllName, L"%016llX.DLL", ((ULONG64)random() << 32) | random());
}
if (DllFullName) {
bool add = false;
FullLength = wcslen(DllFullName);
if (DllName && !wcsstr(DllFullName, DllName) && wcsnicmp(DllFullName + FullLength - 4, L".dll", 4)) {
add = true;
FullLength += Length;
}
wcscpy(_DllFullName = new wchar_t[++FullLength], DllFullName);
if (add) wsprintfW(_DllFullName, L"%s\\%s", _DllFullName, _DllName);
}
else {
FullLength = 16 + 1 + Length; //hex(ULONG64) + '\\' + _DllName
swprintf(_DllFullName = new wchar_t[FullLength], L"%016llX\\%s", ((ULONG64)random() << 32) | random(), _DllName);
}
FullLength *= sizeof(wchar_t);
Length *= sizeof(wchar_t);
/* Allocate space for full DLL name */
if (!(FullDllName->Buffer = (PWSTR)NtAllocateLdrpHeap(FullLength))) goto end;
FullDllName->Length = FullLength - sizeof(wchar_t);
FullDllName->MaximumLength = FullLength;
wcscpy(FullDllName->Buffer, _DllFullName);
/* Construct base DLL name */
BaseDllName->Length = Length - sizeof(wchar_t);
BaseDllName->MaximumLength = Length;
BaseDllName->Buffer = (PWSTR)NtAllocateLdrpHeap(Length);
if (!BaseDllName->Buffer) {
NtFreeLdrpHeap(BaseDllName->Buffer);
goto end;
}
wcscpy(BaseDllName->Buffer, _DllName);
result = true;
end:
delete[]_DllName;
delete[]_DllFullName;
return result;
}
static PLDR_DATA_TABLE_ENTRY NTAPI NtAllocateDataTableEntry(IN PVOID BaseAddress) {
PLDR_DATA_TABLE_ENTRY LdrEntry = nullptr;
PIMAGE_NT_HEADERS NtHeader;
/* Make sure the header is valid */
if (NtHeader = RtlImageNtHeader(BaseAddress)) {
/* Allocate an entry */
LdrEntry = (decltype(LdrEntry))NtAllocateLdrpHeap(NtLdrDataTableEntrySize());
}
/* Return the entry */
return LdrEntry;
}
static VOID NTAPI NtInsertMemoryTableEntry(IN PLDR_DATA_TABLE_ENTRY LdrEntry) {
PPEB_LDR_DATA PebData = NtCurrentPeb()->Ldr;
PLIST_ENTRY LdrpHashTable = RtlFindLdrpHashTable();
ULONG i;
/* Insert into hash table */
i = LdrHashEntry(LdrEntry->BaseDllName);
InsertTailList(&LdrpHashTable[i], &LdrEntry->HashLinks);
/* Insert into other lists */
InsertTailList(&PebData->InLoadOrderModuleList, &LdrEntry->InLoadOrderLinks);
InsertTailList(&PebData->InMemoryOrderModuleList, &LdrEntry->InMemoryOrderLinks);
InsertTailList(&PebData->InInitializationOrderModuleList, &LdrEntry->InInitializationOrderLinks);
}
static NTSTATUS NTAPI NtMapDllMemory(IN HMEMORYMODULE ViewBase, IN DWORD dwFlags, IN PCWSTR DllName OPTIONAL,
IN PCWSTR lpFullDllName OPTIONAL, OUT PLDR_DATA_TABLE_ENTRY* DataTableEntry OPTIONAL) {
UNICODE_STRING FullDllName, BaseDllName;
PIMAGE_NT_HEADERS NtHeaders;
PLDR_DATA_TABLE_ENTRY LdrEntry;
if (!(NtHeaders = RtlImageNtHeader(ViewBase))) return STATUS_INVALID_IMAGE_FORMAT;
if (!(LdrEntry = NtAllocateDataTableEntry(ViewBase))) return STATUS_NO_MEMORY;
if (!NtResolveDllNameUnicodeString(DllName, lpFullDllName, &BaseDllName, &FullDllName)) {
NtFreeLdrpHeap(LdrEntry);
return STATUS_NO_MEMORY;
}
if (!NtInitializeLdrDataTableEntry(LdrEntry, dwFlags, ViewBase, BaseDllName, FullDllName)) {
NtFreeLdrpHeap(LdrEntry);
NtFreeLdrpHeap(BaseDllName.Buffer);
NtFreeLdrpHeap(FullDllName.Buffer);
return STATUS_UNSUCCESSFUL;
}
NtInsertMemoryTableEntry(LdrEntry);
if (DataTableEntry)*DataTableEntry = LdrEntry;
return STATUS_SUCCESS;
}
NTSTATUS NTAPI NtLoadDllMemory(OUT HMEMORYMODULE* BaseAddress, IN LPVOID BufferAddress, IN size_t BufferSize) {
return NtLoadDllMemoryExW(BaseAddress, nullptr, LOAD_FLAGS_NOT_FAIL_IF_HANDLE_TLS, BufferAddress, BufferSize, nullptr, nullptr);
}
NTSTATUS NTAPI NtLoadDllMemoryExW(
OUT HMEMORYMODULE* BaseAddress,
OUT PVOID* LdrEntry OPTIONAL,
IN DWORD dwFlags,
IN LPVOID BufferAddress,
IN size_t BufferSize,
IN LPCWSTR DllName OPTIONAL,
IN LPCWSTR DllFullName OPTIONAL) {
PMEMORYMODULE module = nullptr;
NTSTATUS status = STATUS_SUCCESS;
PLDR_DATA_TABLE_ENTRY ModuleEntry = nullptr;
PIMAGE_NT_HEADERS headers = nullptr;
UNREFERENCED_PARAMETER(BufferSize);
__try {
if (IsBadReadPtr(BufferAddress, BufferSize))status = STATUS_ACCESS_VIOLATION;
*BaseAddress = nullptr;
if (LdrEntry)*LdrEntry = nullptr;
}
__except (EXCEPTION_EXECUTE_HANDLER) {
status = GetExceptionCode();
}
if (!NT_SUCCESS(status))return status;
if (dwFlags & LOAD_FLAGS_NOT_MAP_DLL) {
dwFlags &= LOAD_FLAGS_NOT_MAP_DLL;
DllName = DllFullName = nullptr;
}
if (dwFlags & LOAD_FLAGS_USE_DLL_NAME && (!DllName || !DllFullName))return STATUS_INVALID_PARAMETER_3;
if (DllName) {
PLIST_ENTRY ListHead, ListEntry;
PLDR_DATA_TABLE_ENTRY CurEntry;
PIMAGE_NT_HEADERS h1 = RtlImageNtHeader(BufferAddress), h2 = nullptr;
if (!h1)return STATUS_INVALID_IMAGE_FORMAT;
ListEntry = (ListHead = &NtCurrentPeb()->Ldr->InLoadOrderModuleList)->Flink;
while (ListEntry != ListHead) {
CurEntry = CONTAINING_RECORD(ListEntry, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);
ListEntry = ListEntry->Flink;
/* Check if it's being unloaded */
if (!CurEntry->InMemoryOrderLinks.Flink) continue;
/* Check if name matches */
if (!wcsnicmp(DllName, CurEntry->BaseDllName.Buffer, (CurEntry->BaseDllName.Length / sizeof(wchar_t)) - 4) ||
!wcsnicmp(DllName, CurEntry->BaseDllName.Buffer, CurEntry->BaseDllName.Length / sizeof(wchar_t))) {
/* Let's compare their headers */
if (!(h2 = RtlImageNtHeader(CurEntry->DllBase)))continue;
if (!(module = MapMemoryModuleHandle(CurEntry->DllBase)))continue;
if ((h1->OptionalHeader.SizeOfCode == h2->OptionalHeader.SizeOfCode) &&
(h1->OptionalHeader.SizeOfHeaders == h2->OptionalHeader.SizeOfHeaders)) {
/* This is our entry!, update load count and return success */
if (!module->UseReferenceCount || dwFlags & LOAD_FLAGS_NOT_USE_REFERENCE_COUNT)return STATUS_INVALID_PARAMETER_3;
NtUpdateReferenceCount(CurEntry, FLAG_REFERENCE);
*BaseAddress = CurEntry->DllBase;
return STATUS_SUCCESS;
}
}
}
}
if (!(*BaseAddress = MemoryLoadLibrary(BufferAddress))) {
switch (GetLastError()) {
case ERROR_BAD_EXE_FORMAT:
return STATUS_INVALID_IMAGE_FORMAT;
case ERROR_OUTOFMEMORY:
return STATUS_NO_MEMORY;
case ERROR_DLL_INIT_FAILED:
return STATUS_DLL_INIT_FAILED;
default:
return STATUS_UNSUCCESSFUL;
}
}
if (!(module = MapMemoryModuleHandle(*BaseAddress))) {
__fastfail(STATUS_INVALID_ADDRESS);
return STATUS_INVALID_ADDRESS;
}
module->loadFromNtLoadDllMemory = true;
headers = RtlImageNtHeader(*BaseAddress);
if (headers->OptionalHeader.DllCharacteristics & IMAGE_DLLCHARACTERISTICS_NO_SEH)dwFlags |= LOAD_FLAGS_NOT_ADD_INVERTED_FUNCTION;
if (dwFlags & LOAD_FLAGS_NOT_MAP_DLL) return status;
status = NtMapDllMemory(*BaseAddress, dwFlags, DllName, DllFullName, &ModuleEntry);
if (!NT_SUCCESS(status)) {
NtUnloadDllMemory(*BaseAddress);
*BaseAddress = nullptr;
return status;
}
module->MappedDll = true;
if (LdrEntry)*LdrEntry = ModuleEntry;
if (!(dwFlags & LOAD_FLAGS_NOT_USE_REFERENCE_COUNT))module->UseReferenceCount = true;
if (!(dwFlags & LOAD_FLAGS_NOT_ADD_INVERTED_FUNCTION)) {
status = RtlInsertInvertedFunctionTable((PVOID)module->codeBase, headers->OptionalHeader.SizeOfImage);
if (!NT_SUCCESS(status)) {
NtUnloadDllMemory(*BaseAddress);
*BaseAddress = nullptr;
if (LdrEntry)*LdrEntry = nullptr;
return status;
}
module->InsertInvertedFunctionTableEntry = true;
}
if (!(dwFlags & LOAD_FLAGS_NOT_HANDLE_TLS)) {
status = LdrpHandleTlsData(ModuleEntry);
if (!NT_SUCCESS(status)) {
do {
if (dwFlags & LOAD_FLAGS_NOT_FAIL_IF_HANDLE_TLS) {
status = 0x7fffffff;
break;
}
NtUnloadDllMemory(*BaseAddress);
*BaseAddress = nullptr;
if (LdrEntry)*LdrEntry = nullptr;
return status;
} while (false);
}
}
return status;
}
NTSTATUS NTAPI NtLoadDllMemoryExA(
OUT HMEMORYMODULE* BaseAddress,
OUT PVOID* LdrEntry OPTIONAL,
IN DWORD dwFlags,
IN LPVOID BufferAddress,
IN size_t BufferSize,
IN LPCSTR DllName OPTIONAL,
IN LPCSTR DllFullName OPTIONAL){
LPWSTR _DllName = nullptr, _DllFullName = nullptr;
size_t size;
NTSTATUS status;
if (DllName) {
size = strlen(DllName) + 1;
_DllName = new wchar_t[size];
mbstowcs(_DllName, DllName, size);
}
if (DllFullName) {
size = strlen(DllFullName) + 1;
_DllFullName = new wchar_t[size];
mbstowcs(_DllFullName, DllFullName, size);
}
status = NtLoadDllMemoryExW(BaseAddress, LdrEntry, dwFlags, BufferAddress, BufferSize, _DllName, _DllFullName);
if (_DllName)delete[]_DllName;
if (_DllFullName)delete[]_DllFullName;
return status;
}
NTSTATUS NTAPI NtUnloadDllMemory(IN HMEMORYMODULE BaseAddress) {
if (IsBadReadPtr(BaseAddress, sizeof(size_t)))return STATUS_ACCESS_VIOLATION;
PLIST_ENTRY ListHead, ListEntry;
PLDR_DATA_TABLE_ENTRY CurEntry;
ULONG count = 0;
NTSTATUS status = STATUS_SUCCESS;
PMEMORYMODULE module = MapMemoryModuleHandle(BaseAddress);
//Not a memory module loaded via NtLoadDllMemory
if (!module || !module->loadFromNtLoadDllMemory)return STATUS_INVALID_HANDLE;
//Mapping dll failed
if (module->loadFromNtLoadDllMemory && !module->MappedDll) {
module->underUnload = true;
MemoryFreeLibrary(BaseAddress);
return STATUS_SUCCESS;
}
ListHead = &NtCurrentPeb()->Ldr->InLoadOrderModuleList;
ListEntry = ListHead->Flink;
while (ListEntry != ListHead) {
CurEntry = CONTAINING_RECORD(ListEntry, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);
ListEntry = ListEntry->Flink;
if (CurEntry->DllBase == BaseAddress) {
if (RtlImageNtHeader(BaseAddress)->OptionalHeader.SizeOfImage == CurEntry->SizeOfImage) {
if (module->UseReferenceCount) {
status = NtGetReferenceCount(CurEntry, &count);
if (!NT_SUCCESS(status))return status;
}
if (!(count & ~1)) {
module->underUnload = true;
if (module->MappedDll) {
if (module->InsertInvertedFunctionTableEntry) {
status = RtlRemoveInvertedFunctionTable(BaseAddress);
if (!NT_SUCCESS(status))__fastfail(status);
}
if (!NtFreeLdrDataTableEntry(CurEntry))__fastfail(STATUS_NOT_SUPPORTED);
}
if (!MemoryFreeLibrary(BaseAddress))__fastfail(STATUS_UNSUCCESSFUL);
return STATUS_SUCCESS;
}
else {
return NtUpdateReferenceCount(CurEntry, FLAG_DEREFERENCE);
}
}
}
}
return STATUS_INVALID_HANDLE;
}
/*
NT functions
*/
VOID NTAPI RtlRbInsertNodeEx(IN PRTL_RB_TREE Tree, IN PRTL_BALANCED_NODE Parent, IN BOOLEAN Right, OUT PRTL_BALANCED_NODE Node) {
decltype(&RtlRbInsertNodeEx)_RtlRbInsertNodeEx = decltype(_RtlRbInsertNodeEx)(RtlGetNtProcAddress("RtlRbInsertNodeEx"));
if (!_RtlRbInsertNodeEx)return;
return _RtlRbInsertNodeEx(Tree, Parent, Right, Node);
}
VOID NTAPI RtlRbRemoveNode(IN PRTL_RB_TREE Tree, IN PRTL_BALANCED_NODE Node) {
decltype(&RtlRbRemoveNode)_RtlRbRemoveNode = decltype(_RtlRbRemoveNode)(RtlGetNtProcAddress("RtlRbRemoveNode"));
if (!_RtlRbRemoveNode)return;
return _RtlRbRemoveNode(Tree, Node);
}
static VOID NTAPI RtlpInsertInvertedFunctionTable(IN PRTL_INVERTED_FUNCTION_TABLE InvertedTable, IN PVOID ImageBase, IN ULONG SizeOfImage) {
#ifdef _WIN64
ULONG CurrentSize;
PIMAGE_RUNTIME_FUNCTION_ENTRY FunctionTable;
ULONG Index;
ULONG SizeOfTable = 0;
PIMAGE_NT_HEADERS headers = RtlImageNtHeader(ImageBase);
PIMAGE_DATA_DIRECTORY dir = &headers->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXCEPTION];
bool need = RtlIsWindowsVersionOrGreater(10, 0, 0);
Index = (ULONG)need;
CurrentSize = InvertedTable->Count;
if (CurrentSize != InvertedTable->MaxCount) {
//if (need)_InterlockedIncrement(&InvertedTable->Epoch);
if (CurrentSize != 0) {
while (Index < CurrentSize) {
if (ImageBase < InvertedTable->Entries[Index].ImageBase)break;
++Index;
}
if (Index != CurrentSize) {
RtlMoveMemory(&InvertedTable->Entries[Index + 1],
&InvertedTable->Entries[Index],
(CurrentSize - Index) * sizeof(RTL_INVERTED_FUNCTION_TABLE_ENTRY));
}
}
FunctionTable = (decltype(FunctionTable))((size_t)ImageBase + dir->VirtualAddress);
if (FunctionTable != RtlImageDirectoryEntryToData(ImageBase, TRUE, IMAGE_DIRECTORY_ENTRY_EXCEPTION, &SizeOfTable) || SizeOfTable != dir->Size) {
__fastfail(STATUS_BAD_DATA);
}
//SizeOfTable = dir->Size;
InvertedTable->Entries[Index].ExceptionDirectory = FunctionTable;
InvertedTable->Entries[Index].ImageBase = ImageBase;
InvertedTable->Entries[Index].ImageSize = SizeOfImage;
InvertedTable->Entries[Index].ExceptionDirectorySize = SizeOfTable;
InvertedTable->Count++;
//if (need)_InterlockedIncrement(&InvertedTable->Epoch);
}
else {
need ? (InvertedTable->Overflow = TRUE) : (InvertedTable->Epoch = TRUE);
}
#else
DWORD ptr, count;
bool IsWin10 = RtlIsWindowsVersionOrGreater(10, 0, 0);
ULONG Index = IsWin10 ? 1 : 0;
if (InvertedTable->Count == InvertedTable->MaxCount) {
InvertedTable->Overflow = TRUE;
return;
}
while (Index < InvertedTable->Count) {
if (ImageBase < (IsWin10 ?
((PRTL_INVERTED_FUNCTION_TABLE_ENTRY_64)&InvertedTable->Entries[Index])->ImageBase :
InvertedTable->Entries[Index].ImageBase))
break;
Index++;
}
if (Index != InvertedTable->Count) {
if (IsWin10) {
RtlMoveMemory(&InvertedTable->Entries[Index + 1], &InvertedTable->Entries[Index],
(InvertedTable->Count - Index) * sizeof(RTL_INVERTED_FUNCTION_TABLE_ENTRY));
}
else {
RtlMoveMemory(&InvertedTable->Entries[Index].NextEntrySEHandlerTableEncoded,
Index ? &InvertedTable->Entries[Index - 1].NextEntrySEHandlerTableEncoded : (PVOID)&InvertedTable->NextEntrySEHandlerTableEncoded,
(InvertedTable->Count - Index) * sizeof(RTL_INVERTED_FUNCTION_TABLE_ENTRY));
}
}
RtlCaptureImageExceptionValues(ImageBase, &ptr, &count);
if (IsWin10) {
//memory layout is same as x64
PRTL_INVERTED_FUNCTION_TABLE_ENTRY_64 entry = (decltype(entry))&InvertedTable->Entries[Index];
entry->ExceptionDirectory = (PIMAGE_RUNTIME_FUNCTION_ENTRY)RtlEncodeSystemPointer((PVOID)ptr);
entry->ExceptionDirectorySize = count;
entry->ImageBase = ImageBase;
entry->ImageSize = SizeOfImage;
}
else {
if (Index) InvertedTable->Entries[Index - 1].NextEntrySEHandlerTableEncoded = RtlEncodeSystemPointer((PVOID)ptr);
else InvertedTable->NextEntrySEHandlerTableEncoded = (DWORD)RtlEncodeSystemPointer((PVOID)ptr);
InvertedTable->Entries[Index].ImageBase = ImageBase;
InvertedTable->Entries[Index].ImageSize = SizeOfImage;
InvertedTable->Entries[Index].SEHandlerCount = count;
}
++InvertedTable->Count;
#endif
return;
}
static VOID NTAPI RtlpRemoveInvertedFunctionTable(IN PRTL_INVERTED_FUNCTION_TABLE InvertedTable, IN PVOID ImageBase) {
ULONG CurrentSize;
ULONG Index;
//bool need = RtlIsWindowsVersionOrGreater(6, 2, 0);
bool IsWin10 = RtlIsWindowsVersionOrGreater(10, 0, 0);
CurrentSize = InvertedTable->Count;
for (Index = 0; Index < CurrentSize; Index += 1) {
if (ImageBase == (IsWin10 ?
((PRTL_INVERTED_FUNCTION_TABLE_ENTRY_64)&InvertedTable->Entries[Index])->ImageBase :
InvertedTable->Entries[Index].ImageBase))
break;
}
if (Index != CurrentSize) {
//if (need)_InterlockedIncrement(&InvertedTable->Epoch);
if (CurrentSize != 1) {
#ifdef _WIN64
RtlMoveMemory(&InvertedTable->Entries[Index],
&InvertedTable->Entries[Index + 1],
(CurrentSize - Index - 1) * sizeof(RTL_INVERTED_FUNCTION_TABLE_ENTRY));
#else
if (IsWin10) {
RtlMoveMemory(&InvertedTable->Entries[Index], &InvertedTable->Entries[Index + 1],
(CurrentSize - Index) * sizeof(RTL_INVERTED_FUNCTION_TABLE_ENTRY));
}
else {
RtlMoveMemory(
Index ? &InvertedTable->Entries[Index - 1].NextEntrySEHandlerTableEncoded : (PVOID)&InvertedTable->NextEntrySEHandlerTableEncoded,
&InvertedTable->Entries[Index].NextEntrySEHandlerTableEncoded,
(CurrentSize - Index) * sizeof(RTL_INVERTED_FUNCTION_TABLE_ENTRY));
}
#endif
}
InvertedTable->Count--;
//if (need)_InterlockedIncrement(&InvertedTable->Epoch);
}
return;
}
typedef struct _SEARCH_CONTEXT {
union {
IN PVOID MemoryBuffer;
size_t InBufferPtr;
};
union {
IN DWORD BufferLength;
size_t reserved0;
};
union {
OUT PVOID MemoryBlockInSection;
size_t OutBufferPtr;
};
union {
DWORD RemainingLength;
size_t reserved1;
};
}SEARCH_CONTEXT, * PSEARCH_CONTEXT;
static NTSTATUS NTAPI RtlFindMemoryBlockFromModuleSection(
IN HMODULE hModule OPTIONAL,
IN LPCSTR lpSectionName OPTIONAL,
IN OUT PSEARCH_CONTEXT SearchContext) {
NTSTATUS status = STATUS_SUCCESS;
size_t begin = 0, buffer = 0;
DWORD Length = 0, bufferLength = 0;
__try {
begin = SearchContext->OutBufferPtr;
Length = SearchContext->RemainingLength;
buffer = SearchContext->InBufferPtr;
bufferLength = SearchContext->BufferLength;
if (!buffer || !bufferLength) {
SearchContext->OutBufferPtr = 0;
SearchContext->RemainingLength = 0;
return STATUS_INVALID_PARAMETER;
}
if (!begin) {
PIMAGE_NT_HEADERS headers = RtlImageNtHeader(hModule);
PIMAGE_SECTION_HEADER section = nullptr;
if (!headers)return STATUS_INVALID_PARAMETER_1;
section = IMAGE_FIRST_SECTION(headers);
for (WORD i = 0; i < headers->FileHeader.NumberOfSections; ++i) {
if (!_stricmp(lpSectionName, (LPCSTR)section->Name)) {
begin = SearchContext->OutBufferPtr = (size_t)hModule + section->VirtualAddress;
Length = SearchContext->RemainingLength = section->SizeOfRawData;
break;
}
++section;
}
if (!begin || !Length || Length < bufferLength) {
SearchContext->OutBufferPtr = 0;
SearchContext->RemainingLength = 0;
return STATUS_NOT_FOUND;
}
}
else {
begin++;
Length--;
}
status = STATUS_NOT_FOUND;
for (DWORD i = 0; i < Length - bufferLength; ++begin, ++i) {
if (RtlCompareMemory((PVOID)begin, (PVOID)buffer, bufferLength) == bufferLength) {
SearchContext->OutBufferPtr = begin;
SearchContext->RemainingLength -= i;
return STATUS_SUCCESS;
}
}
}
__except (EXCEPTION_EXECUTE_HANDLER) {
status = GetExceptionCode();
}
SearchContext->OutBufferPtr = 0;
SearchContext->RemainingLength = 0;
return status;
}
static PVOID FindLdrpInvertedFunctionTable32() {
// _RTL_INVERTED_FUNCTION_TABLE x86
// Count +0x0 ????????
// MaxCount +0x4 0x00000200
// Overflow +0x8 0x00000000(Win7) ????????(Win10)
// NextEntrySEHandlerTableEncoded +0xc 0x00000000(Win10) ++++++++(Win7)
// _RTL_INVERTED_FUNCTION_TABLE_ENTRY[0] +0x10 ntdll.dll(win10) or The smallest base module
// ImageBase +0x10 ++++++++
// ImageSize +0x14 ++++++++
// SEHandlerCount +0x18 ++++++++
// NextEntrySEHandlerTableEncoded +0x1c ++++++++(Win10) ????????(Win7)
// _RTL_INVERTED_FUNCTION_TABLE_ENTRY[1] ... ...
// ......
HMODULE hModule = nullptr, hNtdll = GetModuleHandleW(L"ntdll.dll");
PIMAGE_NT_HEADERS NtdllHeaders = RtlImageNtHeader(hNtdll), ModuleHeaders = nullptr;
_RTL_INVERTED_FUNCTION_TABLE_ENTRY_WIN7_32 entry{};
LPCSTR lpSectionName = ".data";
SEARCH_CONTEXT SearchContext{ SearchContext.MemoryBuffer = &entry,SearchContext.BufferLength = sizeof(entry) };
BYTE Offset = 0xC;
PLIST_ENTRY ListHead = &NtCurrentPeb()->Ldr->InMemoryOrderModuleList,
ListEntry = ListHead->Flink;
PLDR_DATA_TABLE_ENTRY CurEntry = nullptr;
DWORD SEHTable, SEHCount;
//Does Windows 8 need fix?
if (RtlIsWindowsVersionOrGreater(10, 0, 0)) {
Offset = 0x20; //sizeof(_RTL_INVERTED_FUNCTION_TABLE_ENTRY)*2
lpSectionName = ".mrdata";
}
while (ListEntry != ListHead) {
CurEntry = CONTAINING_RECORD(ListEntry, LDR_DATA_TABLE_ENTRY, InMemoryOrderLinks);
ListEntry = ListEntry->Flink;
if (CurEntry->DllBase == hNtdll && Offset == 0x20)continue; //Win10 skip first entry, if the base of ntdll is smallest.
hModule = (HMODULE)(hModule ? min(hModule, CurEntry->DllBase) : CurEntry->DllBase);
}
ModuleHeaders = RtlImageNtHeader(hModule);
if (!hModule || !ModuleHeaders || !hNtdll || !NtdllHeaders)return nullptr;
RtlCaptureImageExceptionValues(hModule, &SEHTable, &SEHCount);
entry = { RtlEncodeSystemPointer((PVOID)SEHTable),(DWORD)hModule,ModuleHeaders->OptionalHeader.SizeOfImage,(PVOID)SEHCount };
while (NT_SUCCESS(RtlFindMemoryBlockFromModuleSection(hNtdll, lpSectionName, &SearchContext))) {
PRTL_INVERTED_FUNCTION_TABLE_WIN7_32 tab = decltype(tab)(SearchContext.OutBufferPtr - Offset);
//Note: Same memory layout for RTL_INVERTED_FUNCTION_TABLE_ENTRY in Windows 10 x86 and x64.
if (RtlIsWindowsVersionOrGreater(6, 2, 0) && tab->MaxCount == 0x200 && !tab->NextEntrySEHandlerTableEncoded) return tab;
else if (tab->MaxCount == 0x200 && !tab->Overflow) return tab;
}
return nullptr;
}
static PVOID FindLdrpInvertedFunctionTable64() {
// _RTL_INVERTED_FUNCTION_TABLE x64
// Count +0x0 ????????
// MaxCount +0x4 0x00000200
// Epoch +0x8 ????????
// OverFlow +0xc 0x00000000
// _RTL_INVERTED_FUNCTION_TABLE_ENTRY[0] +0x10 ntdll.dll(win10) or The smallest base module
// ExceptionDirectory +0x10 ++++++++
// ImageBase +0x18 ++++++++
// ImageSize +0x20 ++++++++
// ExceptionDirectorySize +0x24 ++++++++
// _RTL_INVERTED_FUNCTION_TABLE_ENTRY[1] ... ...
// ......
HMODULE hModule = nullptr, hNtdll = GetModuleHandleW(L"ntdll.dll");
PIMAGE_NT_HEADERS NtdllHeaders = RtlImageNtHeader(hNtdll), ModuleHeaders = nullptr;
_RTL_INVERTED_FUNCTION_TABLE_ENTRY_64 entry{};
LPCSTR lpSectionName = ".data";
PIMAGE_DATA_DIRECTORY dir = nullptr;
SEARCH_CONTEXT SearchContext{ SearchContext.MemoryBuffer = &entry,SearchContext.BufferLength = sizeof(entry) };
if (RtlIsWindowsVersionOrGreater(10, 0, 0)) {
hModule = hNtdll;
ModuleHeaders = NtdllHeaders;
lpSectionName = ".mrdata";
}
else {
PLIST_ENTRY ListHead = &NtCurrentPeb()->Ldr->InLoadOrderModuleList,
ListEntry = ListHead->Flink;
PLDR_DATA_TABLE_ENTRY CurEntry = nullptr;
while (ListEntry != ListHead) {
CurEntry = CONTAINING_RECORD(ListEntry, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);
ListEntry = ListEntry->Flink;
hModule = (HMODULE)(hModule ? min(hModule, CurEntry->DllBase) : CurEntry->DllBase);
}
ModuleHeaders = RtlImageNtHeader(hModule);
}
if (!hModule || !ModuleHeaders || !hNtdll || !NtdllHeaders)return nullptr;
dir = &ModuleHeaders->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXCEPTION];
entry = {
dir->Size ? decltype(entry.ExceptionDirectory)((size_t)hModule + dir->VirtualAddress) : nullptr ,
(PVOID)hModule, ModuleHeaders->OptionalHeader.SizeOfImage,dir->Size
};
while (NT_SUCCESS(RtlFindMemoryBlockFromModuleSection(hNtdll, lpSectionName, &SearchContext))) {
PRTL_INVERTED_FUNCTION_TABLE_64 tab = decltype(tab)(SearchContext.OutBufferPtr - 0x10);
if (RtlIsWindowsVersionOrGreater(6, 2, 0) && tab->MaxCount == 0x200 && !tab->Overflow) return tab;
else if (tab->MaxCount == 0x200 && !tab->Epoch) return tab;
}
return nullptr;
}
#ifdef _WIN64
#define FindLdrpInvertedFunctionTable FindLdrpInvertedFunctionTable64
#else
#define FindLdrpInvertedFunctionTable FindLdrpInvertedFunctionTable32
#endif
static PVOID NTAPI RtlFindLdrpInvertedFunctionTable() {
static PVOID LdrpInvertedFunctionTable = FindLdrpInvertedFunctionTable();
return LdrpInvertedFunctionTable;
}
static NTSTATUS NTAPI RtlProtectMrdata(IN SIZE_T Protect) {
static PVOID MrdataBase = nullptr;
static SIZE_T size = 0;
NTSTATUS status;
PVOID tmp;
SIZE_T tmp_len;
SIZE_T old;
if (!MrdataBase) {
MEMORY_BASIC_INFORMATION mbi{};
status = NtQueryVirtualMemory(GetCurrentProcess(), RtlFindLdrpInvertedFunctionTable(), MemoryBasicInformation, &mbi, sizeof(mbi), nullptr);
if (!NT_SUCCESS(status))return status;
MrdataBase = mbi.BaseAddress;
size = mbi.RegionSize;
}
tmp = MrdataBase;
tmp_len = size;
return NtProtectVirtualMemory(GetCurrentProcess(), &tmp, &tmp_len, Protect, &old);
}
NTSTATUS NTAPI RtlInsertInvertedFunctionTable(IN PVOID BaseAddress, IN size_t ImageSize) {
static auto table = PRTL_INVERTED_FUNCTION_TABLE(RtlFindLdrpInvertedFunctionTable());
if (!table)return STATUS_NOT_SUPPORTED;
bool need_virtual_protect = RtlIsWindowsVersionOrGreater(8, 3, 0);
NTSTATUS status;
if (need_virtual_protect) {
status = RtlProtectMrdata(PAGE_READWRITE);
if (!NT_SUCCESS(status))return status;
}
RtlpInsertInvertedFunctionTable(table, BaseAddress, ImageSize);
if (need_virtual_protect) {
status = RtlProtectMrdata(PAGE_READONLY);
if (!NT_SUCCESS(status))return status;
}
#ifdef _WIN64
if (RtlIsWindowsVersionOrGreater(6, 2, 0)) return table->Overflow ? STATUS_INVALID_ADDRESS : STATUS_SUCCESS;
else return table->Epoch ? STATUS_INVALID_ADDRESS : STATUS_SUCCESS;
#else
return (need_virtual_protect ? table->NextEntrySEHandlerTableEncoded : table->Overflow) ? STATUS_INVALID_ADDRESS : STATUS_SUCCESS;
#endif
}
NTSTATUS NTAPI RtlRemoveInvertedFunctionTable(IN PVOID ImageBase) {
static auto table = PRTL_INVERTED_FUNCTION_TABLE(RtlFindLdrpInvertedFunctionTable());
bool need_virtual_protect = RtlIsWindowsVersionOrGreater(10, 0, 0);
NTSTATUS status;
if (need_virtual_protect) {
status = RtlProtectMrdata(PAGE_READWRITE);
if (!NT_SUCCESS(status))return status;
}
RtlpRemoveInvertedFunctionTable(table, ImageBase);
if (need_virtual_protect) {
status = RtlProtectMrdata(PAGE_READONLY);
if (!NT_SUCCESS(status))return status;
}
return STATUS_SUCCESS;
}
static NTSTATUS NTAPI LdrpHandleTlsDataXp(PLDR_DATA_TABLE_ENTRY LdrEntry) {
return STATUS_NOT_SUPPORTED;
}
static NTSTATUS NTAPI RtlFindLdrpHandleTlsData(PVOID* _LdrpHandleTlsData, bool* stdcall) {
NTSTATUS status = STATUS_SUCCESS;
__try {
*_LdrpHandleTlsData = nullptr;
*stdcall = false;
}
__except (EXCEPTION_EXECUTE_HANDLER) {
status = GetExceptionCode();
}
if (!NT_SUCCESS(status))return status;
DWORD Versions[3]{};
LPCVOID Feature = nullptr;
BYTE Size = 0;
WORD OffsetOfFunctionBegin = 0;
RtlGetNtVersionNumbers(Versions, Versions + 1, Versions + 2);
switch (Versions[0]) {
case 10: {
if (Versions[1])return STATUS_NOT_SUPPORTED;
//RS3
if (Versions[2] >= 16299) {
Size = 7;
//19H2
if (Versions[2] >= 18363)Feature = "\x74\x33\x44\x8D\x43\x09";
//RS5
else if (Versions[2] >= 17763) Feature = "\x8b\xc1\x8d\x4d\xbc\x51";
//RS4
else if (Versions[2] >= 17134) Feature = "\x33\xf6\x85\xc0\x79\x03";
//RS3
else Feature = "\x8b\xc1\x8d\x4d\xac\x51";
#ifdef _WIN64
//RS6(19H1)
if (Versions[2] >= 18362) OffsetOfFunctionBegin = 0x46;
//RS4
else if (Versions[2] >= 17134) OffsetOfFunctionBegin = 0x44;
//RS3
else OffsetOfFunctionBegin = 0x43;
#else
//19H2
if (Versions[2] == 18363) {
Feature = "\x74\x25\x8b\xc1\x8d\x4d\xbc";
OffsetOfFunctionBegin = 0x16;
}
//RS6(19H1)
else if (Versions[2] == 18362) OffsetOfFunctionBegin = 0x2E;
//RS5
else if (Versions[2] >= 17763) OffsetOfFunctionBegin = 0x2C;
//RS3,4
else OffsetOfFunctionBegin = 0x18;
#endif
break;
}
//RS2
else if (Versions[2] >= 15063) {
Size = 7;
#ifdef _WIN64
OffsetOfFunctionBegin = 0x43;
Feature = "\x74\x33\x44\x8d\x43\x09";
#else
OffsetOfFunctionBegin = 0x18;
Feature = "\x8b\xc1\x8d\x4d\xbc\x51";
#endif
break;
}
// NO BREAK
}
case 6: {
switch (Versions[1]) {
//8.1
case 3: {
#ifdef _WIN64
Size = 10;
OffsetOfFunctionBegin = 0x43;
Feature = "\x44\x8d\x43\x09\x4c\x8d\x4c\x24\x38";
#else
Size = 8;
OffsetOfFunctionBegin = 0x1B;
Feature = "\x50\x6a\x09\x6a\x01\x8b\xc1";
#endif
break;
}
//8
case 2: {
#ifdef _WIN64
Size = 9;
OffsetOfFunctionBegin = 0x49;
Feature = "\x48\x8b\x79\x30\x45\x8d\x66\x01";
#else
Size = 7;
OffsetOfFunctionBegin = 0xC;
Feature = "\x8b\x45\x08\x89\x45\xa0";
#endif
break;
}
//7
case 1: {
#ifdef _WIN64
Size = 12;
OffsetOfFunctionBegin = 0x27;
Feature = "\x41\xb8\x09\x00\x00\x00\x48\x8d\x44\x24\x38";
#else
Size = 9;
OffsetOfFunctionBegin = 0x14;
Feature = "\x74\x20\x8d\x45\xd4\x50\x6a\x09";
#endif
break;
}
default:return STATUS_NOT_SUPPORTED;
}
break;
}
default: {
*_LdrpHandleTlsData = LdrpHandleTlsDataXp;
*stdcall = true;
return status;
}
}
SEARCH_CONTEXT SearchContext{ SearchContext.MemoryBuffer = const_cast<PVOID>(Feature),SearchContext.BufferLength = Size - 1 };
if (NT_SUCCESS(RtlFindMemoryBlockFromModuleSection(GetModuleHandleW(L"ntdll.dll"), ".text", &SearchContext)))
SearchContext.OutBufferPtr -= OffsetOfFunctionBegin;
if (!(*_LdrpHandleTlsData = SearchContext.MemoryBlockInSection))return STATUS_NOT_SUPPORTED;
*stdcall = !RtlIsWindowsVersionOrGreater(6, 3, 0);
return status;
}
NTSTATUS NTAPI LdrpHandleTlsData(IN PLDR_DATA_TABLE_ENTRY LdrEntry) {
typedef NTSTATUS(__thiscall* _PTR_WIN8_1)(PLDR_DATA_TABLE_ENTRY LdrEntry);
typedef NTSTATUS(__stdcall* _PTR_WIN)(PLDR_DATA_TABLE_ENTRY LdrEntry);
union _FUNCTION_SET {
_PTR_WIN8_1 Win8_1_OrGreater;
_PTR_WIN Default;
_FUNCTION_SET() {
this->Default = nullptr;
}
operator bool() {
return this->Default != nullptr;
}
};
static _FUNCTION_SET _LdrpHandleTlsData{};
static bool stdcall = false;
NTSTATUS status;
if (!_LdrpHandleTlsData) {
status = RtlFindLdrpHandleTlsData((PVOID*)&_LdrpHandleTlsData.Default, &stdcall);
if (!NT_SUCCESS(status))return status;
}
return stdcall ? _LdrpHandleTlsData.Default(LdrEntry) : _LdrpHandleTlsData.Win8_1_OrGreater(LdrEntry);
}
int NTAPI RtlCaptureImageExceptionValues(PVOID BaseAddress, PDWORD SEHandlerTable, PDWORD SEHandlerCount) {
PIMAGE_LOAD_CONFIG_DIRECTORY pLoadConfigDirectory;
PIMAGE_COR20_HEADER pCor20;
ULONG Size;
//check if no seh
if (RtlImageNtHeader(BaseAddress)->OptionalHeader.DllCharacteristics & IMAGE_DLLCHARACTERISTICS_NO_SEH) {
*SEHandlerTable = *SEHandlerCount = -1;
return 0;
}
//get seh table and count
pLoadConfigDirectory = (decltype(pLoadConfigDirectory))RtlImageDirectoryEntryToData(BaseAddress, TRUE, IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG, &Size);
if (pLoadConfigDirectory) {
if (Size == 0x40 && pLoadConfigDirectory->Size >= 0x48u) {
if (pLoadConfigDirectory->SEHandlerTable && pLoadConfigDirectory->SEHandlerCount) {
*SEHandlerTable = pLoadConfigDirectory->SEHandlerTable;
return *SEHandlerCount = pLoadConfigDirectory->SEHandlerCount;
}
}
}
//is .net core ?
pCor20 = (decltype(pCor20))RtlImageDirectoryEntryToData(BaseAddress, TRUE, IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR, &Size);
*SEHandlerTable = *SEHandlerCount = ((pCor20 && pCor20->Flags & 1) ? -1 : 0);
return 0;
}
#ifndef _WIN64
#undef RtlCompareMemory
#undef FindLdrpInvertedFunctionTable
#endif
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