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#include <ntddk.h>
#include <DriverThread.hpp>
#include "memory.hpp"
using namespace DriverThread;
static Thread thread;
extern "C" {
DRIVER_INITIALIZE DriverEntry;
DRIVER_UNLOAD DriverUnload;
NTSTATUS DriverEntry(_In_ struct _DRIVER_OBJECT *DriverObject,
_In_ PUNICODE_STRING RegistryPath) {
UNREFERENCED_PARAMETER(DriverObject);
UNREFERENCED_PARAMETER(RegistryPath);
const eastl::array<uint8_t, 10> buffer = {0x41, 0xDE, 0xAD, 0xC0, 0xDE,
0xCA, 0xFE, 0xCA, 0xFE, 0x41};
const eastl::array<uint8_t, 2> pattern_00 = {0xCA, 0xFE};
const eastl::array<uint8_t, 2> pattern_01 = {0xFE, 0x41};
const eastl::array<uint8_t, 1> pattern_02 = {0x41};
const eastl::array<uint8_t, 10> pattern_03 = {0x41, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x41};
eastl::vector<size_t> found_offsets;
auto found = PatternScanner::SearchWithMask(
buffer.data(), eastl::size(buffer), pattern_00.data(),
eastl::size(pattern_00), "xx", found_offsets);
if (!found) {
DbgPrint("%s\n", "First pattern not found!");
return STATUS_UNSUCCESSFUL;
}
found = PatternScanner::SearchWithMask(
buffer.data(), eastl::size(buffer), pattern_01.data(),
eastl::size(pattern_01), "xx", found_offsets);
if (!found) {
DbgPrint("%s\n", "Second pattern not found!");
return STATUS_UNSUCCESSFUL;
}
found = PatternScanner::SearchWithMask(
buffer.data(), eastl::size(buffer), pattern_02.data(),
eastl::size(pattern_02), "x", found_offsets);
if (!found) {
DbgPrint("%s\n", "Third pattern not found!");
return STATUS_UNSUCCESSFUL;
}
found = PatternScanner::SearchWithMask(buffer, pattern_03, "x????????x",
found_offsets);
if (!found) {
DbgPrint("%s\n", "Fourth pattern not found!");
return STATUS_UNSUCCESSFUL;
}
found = PatternScanner::SearchWithMask(
buffer, {0xDE, 0xAD, 0x00, 0x00, 0x00, 0x00, 0xCA, 0xFE}, "xx????xx",
found_offsets);
if (!found) {
DbgPrint("%s\n", "Fifth pattern not found!");
return STATUS_UNSUCCESSFUL;
}
for (const auto offset : found_offsets) {
DbgPrint("Offset: %zu\n", offset);
}
DbgPrint("%s\n", "Starting thread..");
auto args = eastl::make_shared<ThreadArgs>();
thread.Start(
[](eastl::shared_ptr<ThreadArgs> args) {
UNREFERENCED_PARAMETER(args);
const auto &procs = ::GetProcesses();
DbgPrint("Got %zu processes on this machine\n", procs.size());
const wchar_t targetProcess[] = L"explorer.exe";
const auto &found = eastl::find_if(
procs.begin(), procs.end(), [&targetProcess](const auto &item) {
if (item.ProcessName == targetProcess)
return true;
return false;
});
if (found == procs.end()) {
DbgPrint("Process not found: '%ws'\n", targetProcess);
return STATUS_SUCCESS;
}
DbgPrint("Process '%ws' pid: %zu\n", targetProcess,
found->UniqueProcessId);
auto pid = reinterpret_cast<HANDLE>(found->UniqueProcessId);
PEPROCESS pep;
HANDLE obj;
if (NT_SUCCESS(::OpenProcess(pid, &pep, &obj))) {
DbgPrint("Opened process with pid 0x%X\n", pid);
const auto &mods = ::GetModules(pep, FALSE);
DbgPrint("Got %zu modules for '%ws'\n", mods.size(), targetProcess);
for (const auto &mod : mods) {
DbgPrint("Module: '%ws'\n", mod.BaseDllName.c_str());
if (mod.BaseDllName == L"Explorer.EXE") {
DbgPrint("Found explorer module, overwriting 'MZ' with 'FU'..\n");
UCHAR headerBuf[2] = {0xFF, 0xFF};
SIZE_T headerOut = sizeof(headerBuf);
NTSTATUS ret;
ULONG oldProt = 0;
ret =
::ReadVirtualMemory(pep, mod.DllBase, headerBuf, &headerOut);
if (!NT_SUCCESS(ret)) {
DbgPrint("::ReadVirtualMemory failed with: 0x%lX\n", ret);
} else {
DbgPrint("First two bytes of '%ws': %c%c\n", targetProcess,
headerBuf[0], headerBuf[1]);
}
ret = ::ProtectVirtualMemory(pep, mod.DllBase, 0x2,
PAGE_READWRITE, &oldProt);
if (!NT_SUCCESS(ret)) {
DbgPrint("::ProtectVirtualMemory failed with: 0x%lx\n", ret);
} else {
DbgPrint("Old page protection (DosHeader): %lu\n", oldProt);
}
headerBuf[0] = 0x41;
headerBuf[1] = 0x41;
headerOut = sizeof(headerBuf);
ret =
::WriteVirtualMemory(pep, headerBuf, mod.DllBase, &headerOut);
if (!NT_SUCCESS(ret)) {
DbgPrint("::WriteVirtualMemory failed with: 0x%lx\n", ret);
}
ret =
::RestoreProtectVirtualMemory(pep, mod.DllBase, 0x2, oldProt);
if (!NT_SUCCESS(ret)) {
DbgPrint("::RestoreProtectVirtualMemory failed with: 0x%lx\n",
ret);
}
headerBuf[0] = 0x00;
headerBuf[0] = 0x00;
headerOut = sizeof(headerBuf);
ret =
::ReadVirtualMemory(pep, mod.DllBase, headerBuf, &headerOut);
if (!NT_SUCCESS(ret)) {
DbgPrint("::ReadVirtualMemory failed with: 0x%lX\n", ret);
} else {
DbgPrint("First two bytes of '%ws': %c%c\n", targetProcess,
headerBuf[0], headerBuf[1]);
}
ret = ::ProtectVirtualMemory(pep, mod.DllBase, 0x2,
PAGE_READWRITE, &oldProt);
if (!NT_SUCCESS(ret)) {
DbgPrint("::ProtectVirtualMemory failed with: 0x%lx\n", ret);
} else {
DbgPrint("Old page protection (DosHeader): %lu\n", oldProt);
}
headerBuf[0] = 'M';
headerBuf[1] = 'Z';
headerOut = sizeof(headerBuf);
ret =
::WriteVirtualMemory(pep, headerBuf, mod.DllBase, &headerOut);
if (!NT_SUCCESS(ret)) {
DbgPrint("::WriteVirtualMemory failed with: 0x%lx\n", ret);
}
ret =
::RestoreProtectVirtualMemory(pep, mod.DllBase, 0x2, oldProt);
if (!NT_SUCCESS(ret)) {
DbgPrint("::RestoreProtectVirtualMemory failed with: 0x%lx\n",
ret);
}
}
{
UCHAR headerBuf[4];
SIZE_T headerOut = sizeof(headerBuf);
NTSTATUS headerStatus =
::ReadVirtualMemory(pep, mod.DllBase, headerBuf, &headerOut);
if (!NT_SUCCESS(headerStatus) || headerOut != sizeof(headerBuf)) {
DbgPrint(
"Could not read the first 4 bytes of the image, got %zu "
"bytes: 0x%X\n",
headerOut, headerStatus);
} else {
if (headerBuf[0] != 0x4D || headerBuf[1] != 0x5A ||
headerBuf[2] != 0x90 || headerBuf[3] != 0x00) {
DbgPrint("Strange, image does not seem to be a PE, first 4 "
"bytes: %c%c 0x%X 0x%X\n",
headerBuf[0], headerBuf[1], headerBuf[2],
headerBuf[3]);
} else
DbgPrint("%s\n", "Explorer.EXE DosHeader restored..");
}
}
}
const auto &pages = ::GetPages(obj, 64);
DbgPrint("Got %zu pages\n", pages.size());
for (const auto &page : pages) {
DbgPrint("%s\n", page.toString().c_str());
}
PatternScanner::ProcessModule scanner(pep, obj, {0x4D, 0x5A, 0x90},
"xxx");
eastl::vector<size_t> results;
auto found = scanner.Scan(L"Explorer.EXE", results);
if (!found)
DbgPrint("%s\n", "PatternScanner::ProcessModule was unsuccessful");
if (results.size() != 1)
DbgPrint(
"PatternScanner::ProcessModule was unsuccessful: %zu results\n",
results.size());
else
DbgPrint("PatternScanner::ProcessModule found address for 'MZ\\x90': %p\n", results[0]);
::CloseProcess(&pep, &obj);
}
DbgPrint("%s\n", "Done.");
return STATUS_SUCCESS;
},
args);
return STATUS_SUCCESS;
}
VOID DriverUnload(_In_ struct _DRIVER_OBJECT *DriverObject) {
UNREFERENCED_PARAMETER(DriverObject);
DbgPrint("%s\n", "Waiting for thread termination..");
thread.WaitForTermination();
}
}
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