-
Notifications
You must be signed in to change notification settings - Fork 116
Expand file tree
/
Copy pathInvertedFunctionTable.cpp
More file actions
202 lines (181 loc) · 6.87 KB
/
InvertedFunctionTable.cpp
File metadata and controls
202 lines (181 loc) · 6.87 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
#include "stdafx.h"
static VOID 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;
bool IsWin8OrGreater = RtlIsWindowsVersionOrGreater(6, 2, 0);
Index = (ULONG)IsWin8OrGreater;
CurrentSize = InvertedTable->Count;
if (CurrentSize != InvertedTable->MaxCount) {
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))RtlImageDirectoryEntryToData(ImageBase, TRUE, IMAGE_DIRECTORY_ENTRY_EXCEPTION, &SizeOfTable);
InvertedTable->Entries[Index].ExceptionDirectory = FunctionTable;
InvertedTable->Entries[Index].ImageBase = ImageBase;
InvertedTable->Entries[Index].ImageSize = SizeOfImage;
InvertedTable->Entries[Index].ExceptionDirectorySize = SizeOfTable;
InvertedTable->Count++;
}
else {
IsWin8OrGreater ? (InvertedTable->Overflow = TRUE) : (InvertedTable->Epoch = TRUE);
}
#else
DWORD ptr, count;
bool IsWin8OrGreater = RtlIsWindowsVersionOrGreater(6, 2, 0);
ULONG Index = IsWin8OrGreater ? 1 : 0;
if (InvertedTable->Count == InvertedTable->MaxCount) {
if (IsWin8OrGreater)InvertedTable->NextEntrySEHandlerTableEncoded = TRUE;
else InvertedTable->Overflow = TRUE;
return;
}
while (Index < InvertedTable->Count) {
if (ImageBase < (IsWin8OrGreater ?
((PRTL_INVERTED_FUNCTION_TABLE_ENTRY_64)&InvertedTable->Entries[Index])->ImageBase :
InvertedTable->Entries[Index].ImageBase))
break;
Index++;
}
if (Index != InvertedTable->Count) {
if (IsWin8OrGreater) {
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 (IsWin8OrGreater) {
//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 RtlpRemoveInvertedFunctionTable(
_In_ PRTL_INVERTED_FUNCTION_TABLE InvertedTable,
_In_ PVOID ImageBase) {
ULONG CurrentSize;
ULONG Index;
//bool need = RtlIsWindowsVersionOrGreater(6, 2, 0);
bool IsWin8OrGreater = RtlIsWindowsVersionOrGreater(6, 2, 0);
CurrentSize = InvertedTable->Count;
for (Index = 0; Index < CurrentSize; Index += 1) {
if (ImageBase == (IsWin8OrGreater ?
((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 (IsWin8OrGreater) {
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);
}
if (InvertedTable->Count != InvertedTable->MaxCount) {
if (IsWin8OrGreater) {
PRTL_INVERTED_FUNCTION_TABLE_64(InvertedTable)->Overflow = FALSE;
}
else {
PRTL_INVERTED_FUNCTION_TABLE_WIN7_32(InvertedTable)->Overflow = FALSE;
}
}
return;
}
static NTSTATUS RtlProtectMrdata(_In_ ULONG Protect) {
static PVOID MrdataBase = nullptr;
static SIZE_T size = 0;
NTSTATUS status;
PVOID tmp;
SIZE_T tmp_len;
ULONG old;
if (!MrdataBase) {
MEMORY_BASIC_INFORMATION mbi{};
status = NtQueryVirtualMemory(GetCurrentProcess(), MmpGlobalDataPtr->MmpInvertedFunctionTable->LdrpInvertedFunctionTable, 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_ ULONG ImageSize) {
auto table = PRTL_INVERTED_FUNCTION_TABLE(MmpGlobalDataPtr->MmpInvertedFunctionTable->LdrpInvertedFunctionTable);
if (!table)return STATUS_NOT_SUPPORTED;
bool need_virtual_protect = RtlIsWindowsVersionOrGreater(6, 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;
}
return (RtlIsWindowsVersionOrGreater(6, 2, 0) ? PRTL_INVERTED_FUNCTION_TABLE_64(table)->Overflow : PRTL_INVERTED_FUNCTION_TABLE_WIN7_32(table)->Overflow) ?
STATUS_NO_MEMORY : STATUS_SUCCESS;
}
NTSTATUS NTAPI RtlRemoveInvertedFunctionTable(_In_ PVOID ImageBase) {
auto table = PRTL_INVERTED_FUNCTION_TABLE(MmpGlobalDataPtr->MmpInvertedFunctionTable->LdrpInvertedFunctionTable);
bool need_virtual_protect = RtlIsWindowsVersionOrGreater(6, 3, 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;
}