mirror of
https://github.com/bb107/MemoryModulePP
synced 2026-06-08 13:15:33 +00:00
Boring
426 lines
18 KiB
C
426 lines
18 KiB
C
#if !(defined(_M_ARM) || defined(_M_ARM64) || defined(_USRDLL))
|
|
|
|
//===============================================================================================//
|
|
// Copyright (c) 2012, Stephen Fewer of Harmony Security (www.harmonysecurity.com)
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without modification, are permitted
|
|
// provided that the following conditions are met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright notice, this list of
|
|
// conditions and the following disclaimer.
|
|
//
|
|
// * Redistributions in binary form must reproduce the above copyright notice, this list of
|
|
// conditions and the following disclaimer in the documentation and/or other materials provided
|
|
// with the distribution.
|
|
//
|
|
// * Neither the name of Harmony Security nor the names of its contributors may be used to
|
|
// endorse or promote products derived from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
|
|
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
|
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
// POSSIBILITY OF SUCH DAMAGE.
|
|
//===============================================================================================//
|
|
#include "ReflectiveLoader.h"
|
|
//===============================================================================================//
|
|
|
|
// This is our position independent reflective DLL loader/injector
|
|
DLLEXPORT ULONG_PTR WINAPI ReflectiveLoader(PVOID buffer)
|
|
{
|
|
// the functions we need
|
|
LOADLIBRARYA pLoadLibraryA = NULL;
|
|
GETPROCADDRESS pGetProcAddress = NULL;
|
|
VIRTUALALLOC pVirtualAlloc = NULL;
|
|
NTFLUSHINSTRUCTIONCACHE pNtFlushInstructionCache = NULL;
|
|
|
|
USHORT usCounter;
|
|
|
|
// the initial location of this image in memory
|
|
ULONG_PTR uiLibraryAddress;
|
|
// the kernels base address and later this images newly loaded base address
|
|
ULONG_PTR uiBaseAddress;
|
|
|
|
// variables for processing the kernels export table
|
|
ULONG_PTR uiAddressArray;
|
|
ULONG_PTR uiNameArray;
|
|
ULONG_PTR uiExportDir;
|
|
ULONG_PTR uiNameOrdinals;
|
|
DWORD dwHashValue;
|
|
|
|
// variables for loading this image
|
|
ULONG_PTR uiHeaderValue;
|
|
ULONG_PTR uiValueA;
|
|
ULONG_PTR uiValueB;
|
|
ULONG_PTR uiValueC;
|
|
ULONG_PTR uiValueD;
|
|
ULONG_PTR uiValueE;
|
|
|
|
// STEP 0: calculate our images current base address
|
|
uiLibraryAddress = (ULONG_PTR)buffer;
|
|
|
|
// STEP 1: process the kernels exports for the functions our loader needs...
|
|
|
|
// get the Process Enviroment Block
|
|
#ifdef WIN_X64
|
|
uiBaseAddress = __readgsqword(0x60);
|
|
#else
|
|
#ifdef WIN_X86
|
|
uiBaseAddress = __readfsdword(0x30);
|
|
#else WIN_ARM
|
|
uiBaseAddress = *(DWORD*)((BYTE*)_MoveFromCoprocessor(15, 0, 13, 0, 2) + 0x30);
|
|
#endif
|
|
#endif
|
|
|
|
// get the processes loaded modules. ref: http://msdn.microsoft.com/en-us/library/aa813708(VS.85).aspx
|
|
uiBaseAddress = (ULONG_PTR)((_PPEB)uiBaseAddress)->pLdr;
|
|
|
|
// get the first entry of the InMemoryOrder module list
|
|
uiValueA = (ULONG_PTR)((PPEB_LDR_DATA)uiBaseAddress)->InMemoryOrderModuleList.Flink;
|
|
while (uiValueA)
|
|
{
|
|
// get pointer to current modules name (unicode string)
|
|
uiValueB = (ULONG_PTR)((PLDR_DATA_TABLE_ENTRY)uiValueA)->BaseDllName.pBuffer;
|
|
// set bCounter to the length for the loop
|
|
usCounter = ((PLDR_DATA_TABLE_ENTRY)uiValueA)->BaseDllName.Length;
|
|
// clear uiValueC which will store the hash of the module name
|
|
uiValueC = 0;
|
|
|
|
// compute the hash of the module name...
|
|
do
|
|
{
|
|
uiValueC = ror((DWORD)uiValueC);
|
|
// normalize to uppercase if the madule name is in lowercase
|
|
if (*((BYTE*)uiValueB) >= 'a')
|
|
uiValueC += *((BYTE*)uiValueB) - 0x20;
|
|
else
|
|
uiValueC += *((BYTE*)uiValueB);
|
|
uiValueB++;
|
|
} while (--usCounter);
|
|
|
|
// compare the hash with that of kernel32.dll
|
|
if ((DWORD)uiValueC == KERNEL32DLL_HASH)
|
|
{
|
|
// get this modules base address
|
|
uiBaseAddress = (ULONG_PTR)((PLDR_DATA_TABLE_ENTRY)uiValueA)->DllBase;
|
|
|
|
// get the VA of the modules NT Header
|
|
uiExportDir = uiBaseAddress + ((PIMAGE_DOS_HEADER)uiBaseAddress)->e_lfanew;
|
|
|
|
// uiNameArray = the address of the modules export directory entry
|
|
uiNameArray = (ULONG_PTR) & ((PIMAGE_NT_HEADERS)uiExportDir)->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT];
|
|
|
|
// get the VA of the export directory
|
|
uiExportDir = (uiBaseAddress + ((PIMAGE_DATA_DIRECTORY)uiNameArray)->VirtualAddress);
|
|
|
|
// get the VA for the array of name pointers
|
|
uiNameArray = (uiBaseAddress + ((PIMAGE_EXPORT_DIRECTORY)uiExportDir)->AddressOfNames);
|
|
|
|
// get the VA for the array of name ordinals
|
|
uiNameOrdinals = (uiBaseAddress + ((PIMAGE_EXPORT_DIRECTORY)uiExportDir)->AddressOfNameOrdinals);
|
|
|
|
usCounter = 3;
|
|
|
|
// loop while we still have imports to find
|
|
while (usCounter > 0)
|
|
{
|
|
// compute the hash values for this function name
|
|
dwHashValue = hash((char*)(uiBaseAddress + DEREF_32(uiNameArray)));
|
|
|
|
// if we have found a function we want we get its virtual address
|
|
if (dwHashValue == LOADLIBRARYA_HASH || dwHashValue == GETPROCADDRESS_HASH || dwHashValue == VIRTUALALLOC_HASH)
|
|
{
|
|
// get the VA for the array of addresses
|
|
uiAddressArray = (uiBaseAddress + ((PIMAGE_EXPORT_DIRECTORY)uiExportDir)->AddressOfFunctions);
|
|
|
|
// use this functions name ordinal as an index into the array of name pointers
|
|
uiAddressArray += (DEREF_16(uiNameOrdinals) * sizeof(DWORD));
|
|
|
|
// store this functions VA
|
|
if (dwHashValue == LOADLIBRARYA_HASH)
|
|
pLoadLibraryA = (LOADLIBRARYA)(uiBaseAddress + DEREF_32(uiAddressArray));
|
|
else if (dwHashValue == GETPROCADDRESS_HASH)
|
|
pGetProcAddress = (GETPROCADDRESS)(uiBaseAddress + DEREF_32(uiAddressArray));
|
|
else if (dwHashValue == VIRTUALALLOC_HASH)
|
|
pVirtualAlloc = (VIRTUALALLOC)(uiBaseAddress + DEREF_32(uiAddressArray));
|
|
|
|
// decrement our counter
|
|
usCounter--;
|
|
}
|
|
|
|
// get the next exported function name
|
|
uiNameArray += sizeof(DWORD);
|
|
|
|
// get the next exported function name ordinal
|
|
uiNameOrdinals += sizeof(WORD);
|
|
}
|
|
}
|
|
else if ((DWORD)uiValueC == NTDLLDLL_HASH)
|
|
{
|
|
// get this modules base address
|
|
uiBaseAddress = (ULONG_PTR)((PLDR_DATA_TABLE_ENTRY)uiValueA)->DllBase;
|
|
|
|
// get the VA of the modules NT Header
|
|
uiExportDir = uiBaseAddress + ((PIMAGE_DOS_HEADER)uiBaseAddress)->e_lfanew;
|
|
|
|
// uiNameArray = the address of the modules export directory entry
|
|
uiNameArray = (ULONG_PTR) & ((PIMAGE_NT_HEADERS)uiExportDir)->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT];
|
|
|
|
// get the VA of the export directory
|
|
uiExportDir = (uiBaseAddress + ((PIMAGE_DATA_DIRECTORY)uiNameArray)->VirtualAddress);
|
|
|
|
// get the VA for the array of name pointers
|
|
uiNameArray = (uiBaseAddress + ((PIMAGE_EXPORT_DIRECTORY)uiExportDir)->AddressOfNames);
|
|
|
|
// get the VA for the array of name ordinals
|
|
uiNameOrdinals = (uiBaseAddress + ((PIMAGE_EXPORT_DIRECTORY)uiExportDir)->AddressOfNameOrdinals);
|
|
|
|
usCounter = 1;
|
|
|
|
// loop while we still have imports to find
|
|
while (usCounter > 0)
|
|
{
|
|
// compute the hash values for this function name
|
|
dwHashValue = hash((char*)(uiBaseAddress + DEREF_32(uiNameArray)));
|
|
|
|
// if we have found a function we want we get its virtual address
|
|
if (dwHashValue == NTFLUSHINSTRUCTIONCACHE_HASH)
|
|
{
|
|
// get the VA for the array of addresses
|
|
uiAddressArray = (uiBaseAddress + ((PIMAGE_EXPORT_DIRECTORY)uiExportDir)->AddressOfFunctions);
|
|
|
|
// use this functions name ordinal as an index into the array of name pointers
|
|
uiAddressArray += (DEREF_16(uiNameOrdinals) * sizeof(DWORD));
|
|
|
|
// store this functions VA
|
|
if (dwHashValue == NTFLUSHINSTRUCTIONCACHE_HASH)
|
|
pNtFlushInstructionCache = (NTFLUSHINSTRUCTIONCACHE)(uiBaseAddress + DEREF_32(uiAddressArray));
|
|
|
|
// decrement our counter
|
|
usCounter--;
|
|
}
|
|
|
|
// get the next exported function name
|
|
uiNameArray += sizeof(DWORD);
|
|
|
|
// get the next exported function name ordinal
|
|
uiNameOrdinals += sizeof(WORD);
|
|
}
|
|
}
|
|
|
|
// we stop searching when we have found everything we need.
|
|
if (pLoadLibraryA && pGetProcAddress && pVirtualAlloc && pNtFlushInstructionCache)
|
|
break;
|
|
|
|
// get the next entry
|
|
uiValueA = DEREF(uiValueA);
|
|
}
|
|
|
|
// STEP 2: load our image into a new permanent location in memory...
|
|
|
|
// get the VA of the NT Header for the PE to be loaded
|
|
uiHeaderValue = uiLibraryAddress + ((PIMAGE_DOS_HEADER)uiLibraryAddress)->e_lfanew;
|
|
|
|
// allocate all the memory for the DLL to be loaded into. we can load at any address because we will
|
|
// relocate the image. Also zeros all memory and marks it as READ, WRITE and EXECUTE to avoid any problems.
|
|
uiBaseAddress = (ULONG_PTR)pVirtualAlloc(NULL, ((PIMAGE_NT_HEADERS)uiHeaderValue)->OptionalHeader.SizeOfImage, MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);
|
|
|
|
// we must now copy over the headers
|
|
uiValueA = ((PIMAGE_NT_HEADERS)uiHeaderValue)->OptionalHeader.SizeOfHeaders;
|
|
uiValueB = uiLibraryAddress;
|
|
uiValueC = uiBaseAddress;
|
|
|
|
while (uiValueA--)
|
|
*(BYTE*)uiValueC++ = *(BYTE*)uiValueB++;
|
|
|
|
// STEP 3: load in all of our sections...
|
|
|
|
// uiValueA = the VA of the first section
|
|
uiValueA = ((ULONG_PTR) & ((PIMAGE_NT_HEADERS)uiHeaderValue)->OptionalHeader + ((PIMAGE_NT_HEADERS)uiHeaderValue)->FileHeader.SizeOfOptionalHeader);
|
|
|
|
// itterate through all sections, loading them into memory.
|
|
uiValueE = ((PIMAGE_NT_HEADERS)uiHeaderValue)->FileHeader.NumberOfSections;
|
|
while (uiValueE--)
|
|
{
|
|
// uiValueB is the VA for this section
|
|
uiValueB = (uiBaseAddress + ((PIMAGE_SECTION_HEADER)uiValueA)->VirtualAddress);
|
|
|
|
// uiValueC if the VA for this sections data
|
|
uiValueC = (uiLibraryAddress + ((PIMAGE_SECTION_HEADER)uiValueA)->PointerToRawData);
|
|
|
|
// copy the section over
|
|
uiValueD = ((PIMAGE_SECTION_HEADER)uiValueA)->SizeOfRawData;
|
|
|
|
while (uiValueD--)
|
|
*(BYTE*)uiValueB++ = *(BYTE*)uiValueC++;
|
|
|
|
// get the VA of the next section
|
|
uiValueA += sizeof(IMAGE_SECTION_HEADER);
|
|
}
|
|
|
|
// STEP 4: process our images import table...
|
|
|
|
// uiValueB = the address of the import directory
|
|
uiValueB = (ULONG_PTR) & ((PIMAGE_NT_HEADERS)uiHeaderValue)->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
|
|
|
|
// we assume their is an import table to process
|
|
// uiValueC is the first entry in the import table
|
|
uiValueC = (uiBaseAddress + ((PIMAGE_DATA_DIRECTORY)uiValueB)->VirtualAddress);
|
|
|
|
// itterate through all imports
|
|
while (((PIMAGE_IMPORT_DESCRIPTOR)uiValueC)->Name)
|
|
{
|
|
// use LoadLibraryA to load the imported module into memory
|
|
uiLibraryAddress = (ULONG_PTR)pLoadLibraryA((LPCSTR)(uiBaseAddress + ((PIMAGE_IMPORT_DESCRIPTOR)uiValueC)->Name));
|
|
|
|
// uiValueD = VA of the OriginalFirstThunk
|
|
uiValueD = (uiBaseAddress + ((PIMAGE_IMPORT_DESCRIPTOR)uiValueC)->OriginalFirstThunk);
|
|
|
|
// uiValueA = VA of the IAT (via first thunk not origionalfirstthunk)
|
|
uiValueA = (uiBaseAddress + ((PIMAGE_IMPORT_DESCRIPTOR)uiValueC)->FirstThunk);
|
|
|
|
// itterate through all imported functions, importing by ordinal if no name present
|
|
while (DEREF(uiValueA))
|
|
{
|
|
// sanity check uiValueD as some compilers only import by FirstThunk
|
|
if (uiValueD && ((PIMAGE_THUNK_DATA)uiValueD)->u1.Ordinal & IMAGE_ORDINAL_FLAG)
|
|
{
|
|
// get the VA of the modules NT Header
|
|
uiExportDir = uiLibraryAddress + ((PIMAGE_DOS_HEADER)uiLibraryAddress)->e_lfanew;
|
|
|
|
// uiNameArray = the address of the modules export directory entry
|
|
uiNameArray = (ULONG_PTR) & ((PIMAGE_NT_HEADERS)uiExportDir)->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT];
|
|
|
|
// get the VA of the export directory
|
|
uiExportDir = (uiLibraryAddress + ((PIMAGE_DATA_DIRECTORY)uiNameArray)->VirtualAddress);
|
|
|
|
// get the VA for the array of addresses
|
|
uiAddressArray = (uiLibraryAddress + ((PIMAGE_EXPORT_DIRECTORY)uiExportDir)->AddressOfFunctions);
|
|
|
|
// use the import ordinal (- export ordinal base) as an index into the array of addresses
|
|
uiAddressArray += ((IMAGE_ORDINAL(((PIMAGE_THUNK_DATA)uiValueD)->u1.Ordinal) - ((PIMAGE_EXPORT_DIRECTORY)uiExportDir)->Base) * sizeof(DWORD));
|
|
|
|
// patch in the address for this imported function
|
|
DEREF(uiValueA) = (uiLibraryAddress + DEREF_32(uiAddressArray));
|
|
}
|
|
else
|
|
{
|
|
// get the VA of this functions import by name struct
|
|
uiValueB = (uiBaseAddress + DEREF(uiValueA));
|
|
|
|
// use GetProcAddress and patch in the address for this imported function
|
|
DEREF(uiValueA) = (ULONG_PTR)pGetProcAddress((HMODULE)uiLibraryAddress, (LPCSTR)((PIMAGE_IMPORT_BY_NAME)uiValueB)->Name);
|
|
}
|
|
// get the next imported function
|
|
uiValueA += sizeof(ULONG_PTR);
|
|
if (uiValueD)
|
|
uiValueD += sizeof(ULONG_PTR);
|
|
}
|
|
|
|
// get the next import
|
|
uiValueC += sizeof(IMAGE_IMPORT_DESCRIPTOR);
|
|
}
|
|
|
|
// STEP 5: process all of our images relocations...
|
|
|
|
// calculate the base address delta and perform relocations (even if we load at desired image base)
|
|
uiLibraryAddress = uiBaseAddress - ((PIMAGE_NT_HEADERS)uiHeaderValue)->OptionalHeader.ImageBase;
|
|
|
|
// uiValueB = the address of the relocation directory
|
|
uiValueB = (ULONG_PTR) & ((PIMAGE_NT_HEADERS)uiHeaderValue)->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
|
|
|
|
// check if their are any relocations present
|
|
if (((PIMAGE_DATA_DIRECTORY)uiValueB)->Size)
|
|
{
|
|
// uiValueC is now the first entry (IMAGE_BASE_RELOCATION)
|
|
uiValueC = (uiBaseAddress + ((PIMAGE_DATA_DIRECTORY)uiValueB)->VirtualAddress);
|
|
|
|
// and we itterate through all entries...
|
|
while (((PIMAGE_BASE_RELOCATION)uiValueC)->SizeOfBlock)
|
|
{
|
|
// uiValueA = the VA for this relocation block
|
|
uiValueA = (uiBaseAddress + ((PIMAGE_BASE_RELOCATION)uiValueC)->VirtualAddress);
|
|
|
|
// uiValueB = number of entries in this relocation block
|
|
uiValueB = (((PIMAGE_BASE_RELOCATION)uiValueC)->SizeOfBlock - sizeof(IMAGE_BASE_RELOCATION)) / sizeof(IMAGE_RELOC);
|
|
|
|
// uiValueD is now the first entry in the current relocation block
|
|
uiValueD = uiValueC + sizeof(IMAGE_BASE_RELOCATION);
|
|
|
|
// we itterate through all the entries in the current block...
|
|
while (uiValueB--)
|
|
{
|
|
// perform the relocation, skipping IMAGE_REL_BASED_ABSOLUTE as required.
|
|
// we dont use a switch statement to avoid the compiler building a jump table
|
|
// which would not be very position independent!
|
|
if (((PIMAGE_RELOC)uiValueD)->type == IMAGE_REL_BASED_DIR64)
|
|
*(ULONG_PTR*)(uiValueA + ((PIMAGE_RELOC)uiValueD)->offset) += uiLibraryAddress;
|
|
else if (((PIMAGE_RELOC)uiValueD)->type == IMAGE_REL_BASED_HIGHLOW)
|
|
*(DWORD*)(uiValueA + ((PIMAGE_RELOC)uiValueD)->offset) += (DWORD)uiLibraryAddress;
|
|
#ifdef WIN_ARM
|
|
// Note: On ARM, the compiler optimization /O2 seems to introduce an off by one issue, possibly a code gen bug. Using /O1 instead avoids this problem.
|
|
else if (((PIMAGE_RELOC)uiValueD)->type == IMAGE_REL_BASED_ARM_MOV32T)
|
|
{
|
|
register DWORD dwInstruction;
|
|
register DWORD dwAddress;
|
|
register WORD wImm;
|
|
// get the MOV.T instructions DWORD value (We add 4 to the offset to go past the first MOV.W which handles the low word)
|
|
dwInstruction = *(DWORD*)(uiValueA + ((PIMAGE_RELOC)uiValueD)->offset + sizeof(DWORD));
|
|
// flip the words to get the instruction as expected
|
|
dwInstruction = MAKELONG(HIWORD(dwInstruction), LOWORD(dwInstruction));
|
|
// sanity chack we are processing a MOV instruction...
|
|
if ((dwInstruction & ARM_MOV_MASK) == ARM_MOVT)
|
|
{
|
|
// pull out the encoded 16bit value (the high portion of the address-to-relocate)
|
|
wImm = (WORD)(dwInstruction & 0x000000FF);
|
|
wImm |= (WORD)((dwInstruction & 0x00007000) >> 4);
|
|
wImm |= (WORD)((dwInstruction & 0x04000000) >> 15);
|
|
wImm |= (WORD)((dwInstruction & 0x000F0000) >> 4);
|
|
// apply the relocation to the target address
|
|
dwAddress = ((WORD)HIWORD(uiLibraryAddress) + wImm) & 0xFFFF;
|
|
// now create a new instruction with the same opcode and register param.
|
|
dwInstruction = (DWORD)(dwInstruction & ARM_MOV_MASK2);
|
|
// patch in the relocated address...
|
|
dwInstruction |= (DWORD)(dwAddress & 0x00FF);
|
|
dwInstruction |= (DWORD)(dwAddress & 0x0700) << 4;
|
|
dwInstruction |= (DWORD)(dwAddress & 0x0800) << 15;
|
|
dwInstruction |= (DWORD)(dwAddress & 0xF000) << 4;
|
|
// now flip the instructions words and patch back into the code...
|
|
*(DWORD*)(uiValueA + ((PIMAGE_RELOC)uiValueD)->offset + sizeof(DWORD)) = MAKELONG(HIWORD(dwInstruction), LOWORD(dwInstruction));
|
|
}
|
|
}
|
|
#endif
|
|
else if (((PIMAGE_RELOC)uiValueD)->type == IMAGE_REL_BASED_HIGH)
|
|
*(WORD*)(uiValueA + ((PIMAGE_RELOC)uiValueD)->offset) += HIWORD(uiLibraryAddress);
|
|
else if (((PIMAGE_RELOC)uiValueD)->type == IMAGE_REL_BASED_LOW)
|
|
*(WORD*)(uiValueA + ((PIMAGE_RELOC)uiValueD)->offset) += LOWORD(uiLibraryAddress);
|
|
|
|
// get the next entry in the current relocation block
|
|
uiValueD += sizeof(IMAGE_RELOC);
|
|
}
|
|
|
|
// get the next entry in the relocation directory
|
|
uiValueC = uiValueC + ((PIMAGE_BASE_RELOCATION)uiValueC)->SizeOfBlock;
|
|
}
|
|
}
|
|
|
|
// STEP 6: call our images entry point
|
|
|
|
// uiValueA = the VA of our newly loaded DLL/EXE's entry point
|
|
uiValueA = (uiBaseAddress + ((PIMAGE_NT_HEADERS)uiHeaderValue)->OptionalHeader.AddressOfEntryPoint);
|
|
|
|
// We must flush the instruction cache to avoid stale code being used which was updated by our relocation processing.
|
|
pNtFlushInstructionCache((HANDLE)-1, NULL, 0);
|
|
|
|
// call our respective entry point, fudging our hInstance value
|
|
((DLLMAIN)uiValueA)((HINSTANCE)uiBaseAddress, DLL_PROCESS_ATTACH, (PVOID)(ULONG_PTR)(-1));
|
|
|
|
// STEP 8: return our base address.
|
|
return uiBaseAddress;
|
|
}
|
|
#endif |