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ArgxCreateProcess.cpp
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/*
* ArgX - Better command line processing for Windows.
*
* Copyright (c) 2019 Alastair J. Houghton.
*
*/
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
#include <winnt.h>
#include <winternl.h>
#include "ArgX.h"
#include "PEB.hpp"
#include "utils.hpp"
#define ARGX_MAXIMUM_FLAT_LENGTH 32767
namespace {
HMODULE hNtDll = NULL;
HMODULE hKernel32Dll = NULL;
HANDLE hProcessHeap = NULL;
// PROCESS_BASIC_INFORMATION, but always 64-bit
typedef struct _PROCESS_BASIC_INFORMATION64 {
DWORD64 Reserved1;
DWORD64 PebBaseAddress;
DWORD64 Reserved2[2];
DWORD64 UniqueProcessId;
DWORD64 Reserved3;
} PROCESS_BASIC_INFORMATION64, *PPROCESS_BASIC_INFORMATION64;
typedef void (__stdcall *LPFN_GETSYSTEMINFO)(LPSYSTEM_INFO);
typedef NTSTATUS (NTAPI *LPFN_NTQUERYINFOPROCESS)(HANDLE, PROCESSINFOCLASS,
PVOID, ULONG, PULONG);
typedef BOOL (__stdcall *LPFN_ISWOW64PROCESS)(HANDLE, PBOOL);
LPFN_GETSYSTEMINFO fnGetSystemInfo;
LPFN_ISWOW64PROCESS fnIsWow64Process;
LPFN_NTQUERYINFOPROCESS fnNtQueryInformationProcess;
#ifndef _WIN64
typedef NTSTATUS (NTAPI *LPFN_NTWOW64READMEM64)(HANDLE, ULONG64, PVOID,
ULONG64, PULONG64);
typedef NTSTATUS (NTAPI *LPFN_NTWOW64WRITEMEM64)(HANDLE, ULONG64, LPCVOID,
ULONG64, PULONG64);
typedef NTSTATUS (NTAPI *LPFN_NTWOW64ALLOCMEM64)(HANDLE, PULONG64, ULONG64,
PULONG64, ULONG, ULONG);
LPFN_NTWOW64READMEM64 fnNtWow64ReadVirtualMemory64;
LPFN_NTWOW64WRITEMEM64 fnNtWow64WriteVirtualMemory64;
LPFN_NTWOW64ALLOCMEM64 fnNtWow64AllocateVirtualMemory64;
#endif
typedef BOOL (__stdcall *LPFN_ARGXCREATEPROCESSW)(LPCWSTR, LPCWSTR*, DWORD,
LPSECURITY_ATTRIBUTES,
LPSECURITY_ATTRIBUTES, BOOL,
DWORD, LPVOID, LPCWSTR,
LPSTARTUPINFOW,
LPPROCESS_INFORMATION);
typedef BOOL (__stdcall *LPFN_ARGXCREATEPROCESSASUSERW)(HANDLE,
LPCWSTR, LPCWSTR*,
DWORD,
LPSECURITY_ATTRIBUTES,
LPSECURITY_ATTRIBUTES,
BOOL,
DWORD, LPVOID, LPCWSTR,
LPSTARTUPINFOW,
LPPROCESS_INFORMATION);
LPFN_ARGXCREATEPROCESSW fnArgxCreateProcessW;
LPFN_ARGXCREATEPROCESSASUSERW fnArgxCreateProcessAsUserW;
typedef enum {
BITNESS_UNKNOWN = 0,
BITNESS_WOW64 = 0x1000,
BITNESS_32_BIT = 32,
BITNESS_32_BIT_WOW64 = (BITNESS_32_BIT|BITNESS_WOW64),
BITNESS_64_BIT = 64
} BITNESS, *PBITNESS;
BOOL CALLBACK InitArgxCreateFunction(PINIT_ONCE InitOnce, PVOID Parameter,
PVOID *lpContext);
INIT_ONCE initOnce = INIT_ONCE_STATIC_INIT;
BOOL ArgxInit() {
return InitOnceExecuteOnce(&initOnce,
InitArgxCreateFunction,
NULL,
NULL);
}
PVOID ArgxAllocate(SIZE_T length) {
return HeapAlloc(hProcessHeap, 0, length);
}
void ArgxFree(PVOID ptr) {
if (ptr)
HeapFree(hProcessHeap, 0, ptr);
}
class ProcessException {
public:
ProcessException(DWORD dwErr) : m_dwErr(dwErr) {}
DWORD getErrorCode() const { return m_dwErr; }
private:
DWORD m_dwErr;
};
class Process {
public:
Process(LPCWSTR* lpArgv, DWORD dwArgc)
: m_bSupportsArgX(FALSE), m_hProcess(NULL),
m_lpArgv(lpArgv), m_dwArgc(dwArgc),
m_bitness(BITNESS_UNKNOWN),
m_imageBaseAddress(0), m_argXSectionAddress(0)
{ }
virtual void start() = 0;
virtual void resume() = 0;
virtual void abort() = 0;
BOOL execute();
LPWSTR packArgv(LPCWSTR* lpArgv, DWORD dwArgc);
BITNESS getBitness();
DWORD64 getImageBaseAddress();
BOOL supportsArgX();
void injectArguments();
protected:
BOOL m_bSupportsArgX;
HANDLE m_hProcess;
LPCWSTR* m_lpArgv;
DWORD m_dwArgc;
private:
void findArgXSection();
void findArgXSection32();
void findArgXSection64();
void injectArgX32();
void injectArgX64();
BOOL readMemory(DWORD64 addr, LPVOID pData, SIZE_T len, SIZE_T* bytesRead);
BOOL writeMemory(DWORD64 addr, LPCVOID pData, SIZE_T len, SIZE_T* bytesWritten);
DWORD64 allocMemory(DWORD64 addr, SIZE_T len, DWORD flAllocationType, DWORD flProtect);
BITNESS m_bitness;
DWORD64 m_imageBaseAddress;
DWORD64 m_argXSectionAddress;
};
class StandardProcess : public Process {
public:
StandardProcess(LPCWSTR lpApplicationName,
LPCWSTR* lpArgv,
DWORD dwArgc,
LPSECURITY_ATTRIBUTES lpProcessAttributes,
LPSECURITY_ATTRIBUTES lpThreadAttributes,
BOOL bInheritHandles,
DWORD dwCreationFlags,
LPVOID lpEnvironment,
LPCWSTR lpCurrentDirectory,
LPSTARTUPINFOW lpStartupInfo,
LPPROCESS_INFORMATION lpProcessInformation)
: Process(lpArgv, dwArgc),
m_pszExecutablePath(NULL),
m_lpApplicationName(lpApplicationName),
m_lpProcessAttributes(lpProcessAttributes),
m_lpThreadAttributes(lpThreadAttributes),
m_bInheritHandles(bInheritHandles),
m_dwCreationFlags(dwCreationFlags),
m_lpEnvironment(lpEnvironment),
m_lpCurrentDirectory(lpCurrentDirectory),
m_lpStartupInfo(lpStartupInfo),
m_lpProcessInformation(lpProcessInformation)
{
m_lpProcessInformation->hProcess = NULL;
m_lpProcessInformation->hThread = NULL;
if (!m_lpApplicationName && lpArgv && dwArgc) {
m_lpApplicationName = m_pszExecutablePath
= ArgxFindExecutableW(lpArgv[0]);
}
}
~StandardProcess() {
if (m_pszExecutablePath)
LocalFree((HLOCAL)m_pszExecutablePath);
}
void start();
void resume();
void abort();
protected:
LPWSTR m_pszExecutablePath;
LPCWSTR m_lpApplicationName;
LPSECURITY_ATTRIBUTES m_lpProcessAttributes;
LPSECURITY_ATTRIBUTES m_lpThreadAttributes;
BOOL m_bInheritHandles;
DWORD m_dwCreationFlags;
LPVOID m_lpEnvironment;
LPCWSTR m_lpCurrentDirectory;
LPSTARTUPINFOW m_lpStartupInfo;
LPPROCESS_INFORMATION m_lpProcessInformation;
};
class OtherUserProcess : public StandardProcess {
public:
OtherUserProcess(HANDLE hToken,
LPCWSTR lpApplicationName,
LPCWSTR* lpArgv,
DWORD dwArgc,
LPSECURITY_ATTRIBUTES lpProcessAttributes,
LPSECURITY_ATTRIBUTES lpThreadAttributes,
BOOL bInheritHandles,
DWORD dwCreationFlags,
LPVOID lpEnvironment,
LPCWSTR lpCurrentDirectory,
LPSTARTUPINFOW lpStartupInfo,
LPPROCESS_INFORMATION lpProcessInformation)
: StandardProcess(lpApplicationName,
lpArgv,
dwArgc,
lpProcessAttributes,
lpThreadAttributes,
bInheritHandles,
dwCreationFlags,
lpEnvironment,
lpCurrentDirectory,
lpStartupInfo,
lpProcessInformation),
m_hToken(hToken)
{}
void start();
protected:
HANDLE m_hToken;
};
struct IMAGE_NT_HEADER_FIXED {
DWORD Signature;
IMAGE_FILE_HEADER FileHeader;
};
struct ARGX_SECTION_DATA32 {
DWORD dwMagic;
DWORD dwArgc;
ULONG pszArgv;
};
struct ARGX_SECTION_DATA64 {
DWORD dwMagic;
DWORD dwArgc;
DWORD64 pszArgv;
};
const char pe00[4] = { 'P', 'E', 0, 0 };
const BYTE argxSection[8] = { 'A', 'r', 'g', 'X', 0, 0, 0, 0 };
} // namespace
BOOL ARGXAPI
ArgxCreateProcessW(LPCWSTR lpApplicationName,
LPCWSTR* lpArgv,
DWORD dwArgc,
LPSECURITY_ATTRIBUTES lpProcessAttributes,
LPSECURITY_ATTRIBUTES lpThreadAttributes,
BOOL bInheritHandles,
DWORD dwCreationFlags,
LPVOID lpEnvironment,
LPCWSTR lpCurrentDirectory,
LPSTARTUPINFOW lpStartupInfo,
LPPROCESS_INFORMATION lpProcessInformation)
{
// Make sure we have our function pointers
if (!ArgxInit())
return FALSE;
// If kernel32 implements this function, call that implementation instead;
// this is to allow Microsoft to take over implementation of ArgxCreateProcessW
// in some future version of Windows.
if (fnArgxCreateProcessW) {
return fnArgxCreateProcessW(lpApplicationName,
lpArgv,
dwArgc,
lpProcessAttributes,
lpThreadAttributes,
bInheritHandles,
dwCreationFlags,
lpEnvironment,
lpCurrentDirectory,
lpStartupInfo,
lpProcessInformation);
}
StandardProcess process(lpApplicationName,
lpArgv,
dwArgc,
lpProcessAttributes,
lpThreadAttributes,
bInheritHandles,
dwCreationFlags,
lpEnvironment,
lpCurrentDirectory,
lpStartupInfo,
lpProcessInformation);
return process.execute();
}
BOOL ARGXAPI
ArgxCreateProcessAsUserW(HANDLE hToken,
LPCWSTR lpApplicationName,
LPCWSTR* lpArgv,
DWORD dwArgc,
LPSECURITY_ATTRIBUTES lpProcessAttributes,
LPSECURITY_ATTRIBUTES lpThreadAttributes,
BOOL bInheritHandles,
DWORD dwCreationFlags,
LPVOID lpEnvironment,
LPCWSTR lpCurrentDirectory,
LPSTARTUPINFOW lpStartupInfo,
LPPROCESS_INFORMATION lpProcessInformation)
{
// Make sure we have our function pointers
if (!ArgxInit())
return FALSE;
// If kernel32 implements this function, call that implementation instead;
// this is to allow Microsoft to take over implementation of
// ArgxCreateProcessAsUserW in some future version of Windows.
if (fnArgxCreateProcessAsUserW) {
return fnArgxCreateProcessAsUserW(hToken,
lpApplicationName,
lpArgv,
dwArgc,
lpProcessAttributes,
lpThreadAttributes,
bInheritHandles,
dwCreationFlags,
lpEnvironment,
lpCurrentDirectory,
lpStartupInfo,
lpProcessInformation);
}
OtherUserProcess process(hToken,
lpApplicationName,
lpArgv,
dwArgc,
lpProcessAttributes,
lpThreadAttributes,
bInheritHandles,
dwCreationFlags,
lpEnvironment,
lpCurrentDirectory,
lpStartupInfo,
lpProcessInformation);
return process.execute();
}
namespace {
BOOL CALLBACK InitArgxCreateFunction(PINIT_ONCE, PVOID, PVOID *)
{
hProcessHeap = GetProcessHeap();
if (!hProcessHeap)
return FALSE;
hNtDll = GetModuleHandleW(L"ntdll.dll");
if (!hNtDll)
return FALSE;
hKernel32Dll = GetModuleHandleW(L"kernel32.dll");
if (!hKernel32Dll)
return FALSE;
// Look for the function in kernel32, so that Microsoft can override this
// implementation
fnArgxCreateProcessW = reinterpret_cast<LPFN_ARGXCREATEPROCESSW>(GetProcAddress(hKernel32Dll, "ArgxCreateProcessW"));
fnArgxCreateProcessAsUserW = reinterpret_cast<LPFN_ARGXCREATEPROCESSASUSERW>(GetProcAddress(hKernel32Dll, "ArgxCreateProcessAsUserW"));
// Look up various low-level functions we need
fnIsWow64Process = reinterpret_cast<LPFN_ISWOW64PROCESS>(GetProcAddress(hKernel32Dll, "IsWow64Process"));
fnGetSystemInfo = reinterpret_cast<LPFN_GETSYSTEMINFO>(GetProcAddress(hKernel32Dll, "GetNativeSystemInfo"));
if (!fnGetSystemInfo)
fnGetSystemInfo = reinterpret_cast<LPFN_GETSYSTEMINFO>(GetProcAddress(hKernel32Dll, "GetSystemInfo"));
fnNtQueryInformationProcess = reinterpret_cast<LPFN_NTQUERYINFOPROCESS>(GetProcAddress(hNtDll, "NtQueryInformationProcess"));
#ifndef _WIN64
// Get some Wow64 pointers, if this is a Wow64 process
LPFN_NTQUERYINFOPROCESS fnWowQueryInfoProcess;
fnWowQueryInfoProcess = reinterpret_cast<LPFN_NTQUERYINFOPROCESS>(GetProcAddress(hNtDll, "NtWow64QueryInformationProcess64"));
if (fnWowQueryInfoProcess)
fnNtQueryInformationProcess = fnWowQueryInfoProcess;
fnNtWow64ReadVirtualMemory64 = reinterpret_cast<LPFN_NTWOW64READMEM64>(GetProcAddress(hNtDll, "NtWow64ReadVirtualMemory64"));
fnNtWow64WriteVirtualMemory64 = reinterpret_cast<LPFN_NTWOW64WRITEMEM64>(GetProcAddress(hNtDll, "NtWow64WriteVirtualMemory64"));
fnNtWow64AllocateVirtualMemory64 = reinterpret_cast<LPFN_NTWOW64ALLOCMEM64>(GetProcAddress(hNtDll, "NtWow64ArgxAllocateVirtualMemory64"));
#endif
return TRUE;
}
} // namespace
LPWSTR
Process::packArgv(LPCWSTR* lpArgv, DWORD dwArgc)
{
DWORD dwLen = 6;
/* We do this in two passes; the first works out how long the result will
be; the second actually fills it in */
for (DWORD dwArg = 0; dwArg < dwArgc; ++dwArg) {
LPCWSTR szArg = lpArgv[dwArg];
const WCHAR *ptr = szArg;
DWORD dwSlashCount = 0;
BOOL quoted = FALSE;
while (*ptr) {
WCHAR ch = *ptr++;
switch (ch) {
case '\\':
++dwSlashCount;
break;
case '"':
if (dwSlashCount)
dwLen += dwSlashCount * 2;
dwLen += 2;
dwSlashCount = 0;
break;
case ' ':
case '\t':
if (!quoted) {
quoted = TRUE;
dwLen += 2;
}
default:
if (dwSlashCount) {
dwLen += dwSlashCount;
dwSlashCount = 0;
}
++dwLen;
}
}
if (dwSlashCount) {
if (quoted)
dwLen += dwSlashCount * 2 + 1;
else
dwLen += dwSlashCount;
}
}
// Spaces and NULL
dwLen += dwArgc;
if (dwLen >= ARGX_MAXIMUM_FLAT_LENGTH)
return NULL;
LPWSTR result = (LPWSTR)ArgxAllocate(dwLen * sizeof(WCHAR));
WCHAR *ptr = result;
for (DWORD dwArg = 0; dwArg < dwArgc; ++dwArg) {
LPCWSTR szArg = lpArgv[dwArg];
const WCHAR *pt2 = szArg;
DWORD dwSlashCount = 0;
BOOL quoted = FALSE;
if (dwArg)
*ptr++ = ' ';
while (*pt2) {
WCHAR ch = *pt2++;
if (ch == ' ' || ch == '\t') {
quoted = TRUE;
break;
}
}
if (quoted)
*ptr++ = '"';
pt2 = szArg;
while (*pt2) {
WCHAR ch = *pt2++;
switch (ch) {
case '\\':
++dwSlashCount;
break;
case '"':
{
WCHAR *pend = ptr + 2 * dwSlashCount;
while (ptr < pend)
*ptr++ = '\\';
dwSlashCount = 0;
*ptr++ = '\\';
*ptr++ = '"';
}
break;
default:
{
WCHAR *pend = ptr + dwSlashCount;
while (ptr < pend)
*ptr++ = '\\';
dwSlashCount = 0;
*ptr++ = ch;
}
break;
}
}
if (dwSlashCount) {
if (quoted) {
WCHAR *pend = ptr + 2 * dwSlashCount;
while (ptr < pend)
*ptr++ = '\\';
*ptr++ = '"';
} else {
WCHAR *pend = ptr + dwSlashCount;
while (ptr < pend)
*ptr++ = '\\';
}
} else if (quoted) {
*ptr++ = '"';
}
}
*ptr++ = '\0';
return result;
}
BITNESS
Process::getBitness()
{
if (m_bitness != BITNESS_UNKNOWN)
return m_bitness;
BOOL bIsWow64 = FALSE;
// On 64-bit Windows, 32-bit applications run in WOW64
if (fnIsWow64Process) {
if (!fnIsWow64Process(m_hProcess, &bIsWow64))
throw ProcessException(GetLastError());
if (bIsWow64) {
m_bitness = BITNESS_32_BIT_WOW64;
return m_bitness;
}
}
// Otherwise, we're native bitness for the system
SYSTEM_INFO si;
fnGetSystemInfo(&si);
switch (si.wProcessorArchitecture) {
case PROCESSOR_ARCHITECTURE_AMD64:
case PROCESSOR_ARCHITECTURE_ARM64:
case PROCESSOR_ARCHITECTURE_IA64:
m_bitness = BITNESS_64_BIT;
break;
default:
m_bitness = BITNESS_32_BIT;
break;
}
return m_bitness;
}
DWORD64
Process::getImageBaseAddress()
{
if (m_imageBaseAddress)
return m_imageBaseAddress;
BITNESS bitness = getBitness();
// Grab the PEB base address
PROCESS_BASIC_INFORMATION64 pbi;
ULONG ulRetLength = 0;
NTSTATUS ntResult = fnNtQueryInformationProcess(m_hProcess,
ProcessBasicInformation,
&pbi,
sizeof(pbi),
&ulRetLength);
if (!NT_SUCCESS(ntResult)) {
SetLastError(ntResult);
return 0;
}
DWORD64 pebBase = (DWORD64)pbi.PebBaseAddress;
switch (bitness) {
case BITNESS_32_BIT:
{
innards::PEB32 peb;
if (!readMemory(pebBase,
&peb,
sizeof(peb),
NULL))
return 0;
m_imageBaseAddress = peb.ImageBaseAddress;
}
break;
case BITNESS_32_BIT_WOW64:
case BITNESS_64_BIT:
{
innards::PEB64 peb;
if (!readMemory(pebBase,
&peb,
sizeof(peb),
NULL))
return 0;
m_imageBaseAddress = peb.ImageBaseAddress;
}
break;
}
return m_imageBaseAddress;
}
BOOL
Process::supportsArgX()
{
findArgXSection();
return m_argXSectionAddress != 0;
}
void
Process::findArgXSection() {
if (m_argXSectionAddress)
return;
switch (getBitness()) {
case BITNESS_UNKNOWN:
throw ProcessException(ERROR_INVALID_PARAMETER);
case BITNESS_32_BIT:
case BITNESS_32_BIT_WOW64:
findArgXSection32();
break;
case BITNESS_64_BIT:
findArgXSection64();
break;
}
}
void
Process::injectArguments() {
findArgXSection();
if (!m_argXSectionAddress)
return;
switch (getBitness()) {
case BITNESS_UNKNOWN:
throw ProcessException(ERROR_INVALID_PARAMETER);
case BITNESS_32_BIT:
case BITNESS_32_BIT_WOW64:
injectArgX32();
break;
case BITNESS_64_BIT:
injectArgX64();
break;
}
}
void
Process::findArgXSection32()
{
if (m_argXSectionAddress)
return;
// Make sure we know the image base address
DWORD64 imageBaseAddr = getImageBaseAddress();
// Now read the IMAGE_DOS_HEADER from ImageBaseAddress
IMAGE_DOS_HEADER dosHeader;
if (!readMemory(imageBaseAddr,
&dosHeader,
sizeof(dosHeader),
NULL))
return;
// That gets us to the IMAGE_NT_HEADERS
DWORD64 pNtHeader = imageBaseAddr + dosHeader.e_lfanew;
IMAGE_NT_HEADER_FIXED ntHeader;
if (!readMemory(pNtHeader,
&ntHeader,
sizeof(ntHeader),
NULL))
return;
if (!argx_utils::EqualMemory(&ntHeader.Signature, pe00, 4))
return;
// The sections start after the header
DWORD64 pSections = (pNtHeader + sizeof(ntHeader)
+ ntHeader.FileHeader.SizeOfOptionalHeader);
size_t len = sizeof(IMAGE_SECTION_HEADER) * ntHeader.FileHeader.NumberOfSections;
IMAGE_SECTION_HEADER *sections = (IMAGE_SECTION_HEADER *)ArgxAllocate(len);
if (!readMemory(pSections,
sections,
len,
NULL)) {
ArgxFree(sections);
return;
}
// Look for the ArgX section
for (unsigned n = 0; n < ntHeader.FileHeader.NumberOfSections; ++n) {
if (argx_utils::EqualMemory(sections[n].Name, argxSection, 8)) {
// Found the ArgX section; check it
if (sections[n].Misc.VirtualSize < sizeof(ARGX_SECTION_DATA32))
continue;
if ((sections[n].Characteristics & (IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE|IMAGE_SCN_MEM_EXECUTE)) != (IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE))
continue;
DWORD64 argxAddr = sections[n].VirtualAddress + imageBaseAddr;
ARGX_SECTION_DATA32 argxData;
if (!readMemory(argxAddr,
&argxData,
sizeof(argxData),
NULL)) {
ArgxFree(sections);
return;
}
if (argxData.dwMagic != ARGX_MAGIC_INIT) {
ArgxFree(sections);
return;
}
ArgxFree(sections);
m_argXSectionAddress = argxAddr;
return;
}
}
ArgxFree(sections);
return;
}
void
Process::findArgXSection64()
{
if (m_argXSectionAddress)
return;
// Find the image base address
DWORD64 imageBaseAddr = getImageBaseAddress();
// Now read the IMAGE_DOS_HEADER from ImageBaseAddress
IMAGE_DOS_HEADER dosHeader;
if (!readMemory(imageBaseAddr,
&dosHeader,
sizeof(dosHeader),
NULL))
return;
// That gets us to the IMAGE_NT_HEADERS
DWORD64 pNtHeader = imageBaseAddr + dosHeader.e_lfanew;
IMAGE_NT_HEADER_FIXED ntHeader;
if (!readMemory(pNtHeader,
&ntHeader,
sizeof(ntHeader),
NULL))
return;
if (!argx_utils::EqualMemory(&ntHeader.Signature, pe00, 4))
return;
// The sections start after the header
DWORD64 pSections = (pNtHeader + sizeof(ntHeader)
+ ntHeader.FileHeader.SizeOfOptionalHeader);
size_t len = sizeof(IMAGE_SECTION_HEADER) * ntHeader.FileHeader.NumberOfSections;
IMAGE_SECTION_HEADER *sections = (IMAGE_SECTION_HEADER *)ArgxAllocate(len);
if (!readMemory(pSections,
sections,
len,
NULL)) {
ArgxFree(sections);
return;
}
// Look for the ArgX section
for (unsigned n = 0; n < ntHeader.FileHeader.NumberOfSections; ++n) {
if (argx_utils::EqualMemory(sections[n].Name, argxSection, 8)) {
// Found the ArgX section; check it
if (sections[n].Misc.VirtualSize < sizeof(ARGX_SECTION_DATA64))
continue;
if ((sections[n].Characteristics & (IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE|IMAGE_SCN_MEM_EXECUTE)) != (IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE))
continue;
DWORD64 argxAddr = sections[n].VirtualAddress + imageBaseAddr;
ARGX_SECTION_DATA32 argxData;
if (!readMemory(argxAddr,
&argxData,
sizeof(argxData),
NULL)) {
ArgxFree(sections);
return;
}
if (argxData.dwMagic != ARGX_MAGIC_INIT) {
ArgxFree(sections);
return;
}
ArgxFree(sections);
m_argXSectionAddress = argxAddr;
return;
}
}
ArgxFree(sections);
return;
}
void
Process::injectArgX32()
{
DWORD dwListSize = sizeof(ULONG) * m_dwArgc;
ULONG* args = (ULONG*)ArgxAllocate(dwListSize + sizeof(DWORD) * m_dwArgc);
DWORD* argLen = (DWORD*)((BYTE*)args + dwListSize);;
DWORD dwOffset = 0;
for (DWORD n = 0; n < m_dwArgc; ++n) {
args[n] = dwOffset;
argLen[n] = static_cast<DWORD>(2 * (lstrlenW(m_lpArgv[n]) + 1));
dwOffset += argLen[n];
}
DWORD64 lpvArgs = allocMemory(NULL,
dwOffset + dwListSize,
MEM_COMMIT,
PAGE_READWRITE);
if (!lpvArgs) {
DWORD dwErr = GetLastError();
ArgxFree(args);
throw ProcessException(dwErr);
}
for (DWORD n = 0; n < m_dwArgc; ++n) {
args[n] += (ULONG)(UINT_PTR)lpvArgs + dwListSize;
if (!writeMemory(args[n],
m_lpArgv[n],
argLen[n],
NULL)) {
DWORD dwErr = GetLastError();
ArgxFree(args);
throw ProcessException(dwErr);
}
}
if (!writeMemory(lpvArgs,
args,
dwListSize,
NULL)) {
DWORD dwErr = GetLastError();
ArgxFree(args);
throw ProcessException(dwErr);
}
ArgxFree(args);
// Update the ArgX section
ARGX_SECTION_DATA32 argxData;
argxData.dwMagic = ARGX_MAGIC;
argxData.dwArgc = m_dwArgc;
argxData.pszArgv = (ULONG)(UINT_PTR)lpvArgs;
if (!writeMemory(m_argXSectionAddress,
&argxData,
sizeof(argxData),
NULL)) {
throw ProcessException(GetLastError());
}
}
void
Process::injectArgX64()
{
DWORD dwListSize = sizeof(DWORD64) * m_dwArgc;
DWORD64* args = (DWORD64*)ArgxAllocate(dwListSize + sizeof(DWORD) * m_dwArgc);
DWORD* argLen = (DWORD*)((BYTE*)args + dwListSize);
DWORD dwOffset = 0;
for (DWORD n = 0; n < m_dwArgc; ++n) {
args[n] = dwOffset;
argLen[n] = static_cast<DWORD>(2 * (lstrlenW(m_lpArgv[n]) + 1));
dwOffset += argLen[n];
}
DWORD64 lpvArgs = allocMemory(NULL,
static_cast<DWORD64>(dwOffset) + dwListSize,
MEM_COMMIT,
PAGE_READWRITE);
if (!lpvArgs) {
DWORD dwErr = GetLastError();
ArgxFree(args);
throw ProcessException(dwErr);
}
for (DWORD n = 0; n < m_dwArgc; ++n) {
args[n] += lpvArgs + dwListSize;
if (!writeMemory(args[n],
m_lpArgv[n],
argLen[n],
NULL)) {
DWORD dwErr = GetLastError();
ArgxFree(args);
throw ProcessException(dwErr);
}
}
if (!writeMemory(lpvArgs,
args,
dwListSize,
NULL)) {
DWORD dwErr = GetLastError();
ArgxFree(args);
throw ProcessException(dwErr);
}
// Update the ArgX section
ARGX_SECTION_DATA64 argxData;
argxData.dwMagic = ARGX_MAGIC;
argxData.dwArgc = m_dwArgc;
argxData.pszArgv = (DWORD64)lpvArgs;
if (!writeMemory(m_argXSectionAddress,
&argxData,
sizeof(argxData),
NULL)) {
throw ProcessException(GetLastError());
}
}
BOOL
Process::readMemory(DWORD64 addr, LPVOID pData, SIZE_T len, SIZE_T* bytesRead)
{
#ifndef _WIN64
if (fnNtWow64ReadVirtualMemory64) {
NTSTATUS res;
ULONG64 ul64BytesRead;
res = fnNtWow64ReadVirtualMemory64(m_hProcess, addr, pData, len, &ul64BytesRead);
if (bytesRead)
*bytesRead = (SIZE_T)ul64BytesRead;
return NT_SUCCESS(res);
}
#endif
return ReadProcessMemory(m_hProcess, (LPVOID)addr, pData, len, bytesRead);
}
BOOL
Process::writeMemory(DWORD64 addr, LPCVOID pData, SIZE_T len, SIZE_T* bytesWritten)
{
#ifndef _WIN64
if (fnNtWow64ReadVirtualMemory64) {
NTSTATUS res;
ULONG64 ul64BytesRead;
res = fnNtWow64WriteVirtualMemory64(m_hProcess, addr, pData, len, &ul64BytesRead);
if (bytesWritten)
*bytesWritten = (SIZE_T)ul64BytesRead;
return NT_SUCCESS(res);
}
#endif
return WriteProcessMemory(m_hProcess, (LPVOID)addr, pData, len, bytesWritten);
}
DWORD64
Process::allocMemory(DWORD64 addr, SIZE_T len, DWORD flAllocationType, DWORD flProtect)
{