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xerox 2 years ago
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      loadup.hpp

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loadup.hpp

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#pragma once
#include <Windows.h>
#include <Winternl.h>
#include <string>
#include <fstream>
#pragma comment(lib, "ntdll.lib")
using nt_load_driver_t = NTSTATUS(__fastcall*)(PUNICODE_STRING);
using nt_unload_driver_t = NTSTATUS(__fastcall*)(PUNICODE_STRING);
namespace util
{
inline bool delete_service_entry(const std::string& service_name)
{
HKEY reg_handle;
static const std::string reg_key("System\\CurrentControlSet\\Services\\");
auto result = RegOpenKeyA(
HKEY_LOCAL_MACHINE,
reg_key.c_str(),
&reg_handle
);
RegCloseKey(reg_handle);
return ERROR_SUCCESS == RegDeleteKeyA(reg_handle, service_name.data());
}
inline bool create_service_entry(const std::string& drv_path, const std::string& service_name)
{
HKEY reg_handle;
std::string reg_key("System\\CurrentControlSet\\Services\\");
reg_key += service_name;
auto result = RegCreateKeyA(
HKEY_LOCAL_MACHINE,
reg_key.c_str(),
&reg_handle
);
if (result != ERROR_SUCCESS)
return false;
//
// set type to 1 (kernel)
//
constexpr std::uint8_t type_value = 1;
result = RegSetValueExA(
reg_handle,
"Type",
NULL,
REG_DWORD,
&type_value,
4u
);
if (result != ERROR_SUCCESS)
return false;
//
// set error control to 3
//
constexpr std::uint8_t error_control_value = 3;
result = RegSetValueExA(
reg_handle,
"ErrorControl",
NULL,
REG_DWORD,
&error_control_value,
4u
);
if (result != ERROR_SUCCESS)
return false;
//
// set start to 3
//
constexpr std::uint8_t start_value = 3;
result = RegSetValueExA(
reg_handle,
"Start",
NULL,
REG_DWORD,
&start_value,
4u
);
if (result != ERROR_SUCCESS)
return false;
//
// set image path to the driver on disk
//
result = RegSetValueExA(
reg_handle,
"ImagePath",
NULL,
REG_SZ,
(std::uint8_t*) drv_path.c_str(),
drv_path.size()
);
if (result != ERROR_SUCCESS)
return false;
return ERROR_SUCCESS == RegCloseKey(reg_handle);
}
// this function was coded by paracord: https://githacks.org/snippets/4#L94
inline bool enable_privilege(const std::wstring& privilege_name)
{
HANDLE token_handle = nullptr;
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &token_handle))
return false;
LUID luid{};
if (!LookupPrivilegeValueW(nullptr, privilege_name.data(), &luid))
return false;
TOKEN_PRIVILEGES token_state{};
token_state.PrivilegeCount = 1;
token_state.Privileges[0].Luid = luid;
token_state.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if (!AdjustTokenPrivileges(token_handle, FALSE, &token_state, sizeof(TOKEN_PRIVILEGES), nullptr, nullptr))
return false;
CloseHandle(token_handle);
return true;
}
inline std::string get_service_image_path(const std::string& service_name)
{
HKEY reg_handle;
DWORD bytes_read;
char image_path[0xFF];
static const std::string reg_key("System\\CurrentControlSet\\Services\\");
auto result = RegOpenKeyA(
HKEY_LOCAL_MACHINE,
reg_key.c_str(),
&reg_handle
);
result = RegGetValueA(
reg_handle,
"ImagePath",
service_name.c_str(),
REG_SZ, NULL,
image_path,
&bytes_read
);
RegCloseKey(reg_handle);
return std::string(image_path);
}
}
namespace driver
{
inline bool load(const std::string& drv_path, const std::string& service_name)
{
if (!util::enable_privilege(L"SeLoadDriverPrivilege"))
return false;
if (!util::create_service_entry("\\??\\" + std::filesystem::absolute(std::filesystem::path(drv_path)).string(), service_name))
return false;
std::string reg_path("\\Registry\\Machine\\System\\CurrentControlSet\\Services\\");
reg_path += service_name;
static const auto lp_nt_load_drv =
::GetProcAddress(
GetModuleHandleA("ntdll.dll"),
"NtLoadDriver"
);
if (lp_nt_load_drv)
{
ANSI_STRING driver_rep_path_cstr;
UNICODE_STRING driver_reg_path_unicode;
RtlInitAnsiString(&driver_rep_path_cstr, reg_path.c_str());
RtlAnsiStringToUnicodeString(&driver_reg_path_unicode, &driver_rep_path_cstr, true);
return ERROR_SUCCESS == reinterpret_cast<nt_load_driver_t>(lp_nt_load_drv)(&driver_reg_path_unicode);
}
return false;
}
inline std::tuple<bool, std::string> load(const std::vector<std::uint8_t>& drv_buffer)
{
static const auto random_file_name = [](std::size_t length) -> std::string
{
static const auto randchar = []() -> char
{
const char charset[] =
"0123456789"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz";
const std::size_t max_index = (sizeof(charset) - 1);
return charset[rand() % max_index];
};
std::string str(length, 0);
std::generate_n(str.begin(), length, randchar);
return str;
};
const auto service_name = random_file_name(16);
const auto file_path = std::filesystem::temp_directory_path().string() + random_file_name(16);
std::ofstream output_file(file_path.c_str(), std::ios::binary);
output_file.write((char*)drv_buffer.data(), drv_buffer.size());
output_file.close();
return { load(file_path, service_name), service_name };
}
inline std::tuple<bool, std::string> load(const void* buffer, const std::size_t size)
{
std::vector<std::uint8_t> image((std::uint8_t*)buffer, (std::uint8_t*)buffer + size);
return load(image);
}
inline bool unload(const std::string& service_name)
{
std::string reg_path("\\Registry\\Machine\\System\\CurrentControlSet\\Services\\");
reg_path += service_name;
static const auto lp_nt_unload_drv =
::GetProcAddress(
GetModuleHandleA("ntdll.dll"),
"NtUnloadDriver"
);
if (lp_nt_unload_drv)
{
ANSI_STRING driver_rep_path_cstr;
UNICODE_STRING driver_reg_path_unicode;
RtlInitAnsiString(&driver_rep_path_cstr, reg_path.c_str());
RtlAnsiStringToUnicodeString(&driver_reg_path_unicode, &driver_rep_path_cstr, true);
const bool unload_drv = !reinterpret_cast<nt_unload_driver_t>(lp_nt_unload_drv)(&driver_reg_path_unicode);
const bool delete_drv = std::filesystem::remove(util::get_service_image_path(service_name));
const bool delete_reg = util::delete_service_entry(service_name);
return unload_drv && delete_drv && delete_reg;
}
return false;
}
}
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