C语言驱动开发之内核通过PEB获取进程参数
PEB结构(Process EnvirORMent Block Structure)其中文名是进程环境块信息，进程环境块内部包含了进程运行的详细参数信息，每一个进程在运行后都会存在一个特有的PEB结构，通过附加进程并遍历这段结构即可得到非常多的有用信息。
在应用层下，如果想要得到PEB的基地址只需要取fs:[0x30]即可，TEB线程环境块则是fs:[0x18]，如果在内核层想要得到应用层进程的PEB信息我们需要调用特定的内核函数来获取，如下案例将教大家如何在内核层取到应用层进程的PEB结构。
首先在开始写代码之前需要先定义好PEB进程环境快结构体，用于对内存指针解析，新建peb.h文件并保存如下代码，这些是微软的结构定义分为32位与64位，官方定义规范而已不需要费工夫。
#pragma once
#include <ntifs.h>
typedef struct _CURDIR // 2 elements, 0x18 bytes (sizeof)
{
struct _UNICODE_STRING DosPath; // 3 elements, 0x10 bytes (sizeof)
VOID* Handle;
}CURDIR, *PCURDIR;
typedef struct _RTL_DRIVE_LETTER_CURDIR // 4 elements, 0x18 bytes (sizeof)
{
UINT16 Flags;
UINT16 Length;
ULONG32 TimeStamp;
struct _STRING DosPath; // 3 elements, 0x10 bytes (sizeof)
}RTL_DRIVE_LETTER_CURDIR, *PRTL_DRIVE_LETTER_CURDIR;
typedef enum _SYSTEM_DLL_TYPE // 7 elements, 0x4 bytes
{
PsNativeSystemDll = 0 ,
PsWowX86SystemDll = 1 ,
PsWowArm32SystemDll = 2 ,
PsWowAmd64SystemDll = 3 ,
PsWowChpeX86SystemDll = 4 ,
PsVsmEnclaveRuntimeDll = 5 ,
PsSystemDllTotalTypes = 6
}SYSTEM_DLL_TYPE, *PSYSTEM_DLL_TYPE;
typedef struct _EWOW64PROCESS // 3 elements, 0x10 bytes (sizeof)
{
VOID* Peb;
UINT16 Machine;
UINT8 _PADDING0_[0x2];
enum _SYSTEM_DLL_TYPE NtdllType;
}EWOW64PROCESS, *PEWOW64PROCESS;
typedef struct _RTL_USER_PROCESS_PARAMETERS // 37 elements, 0x440 bytes (sizeof)
{
ULONG32 MaximumLength;
ULONG32 Length;
ULONG32 Flags;
ULONG32 DebugFlags;
VOID* ConsoleHandle;
ULONG32 ConsoleFlags;
UINT8 _PADDING0_[0x4];
VOID* StandardInput;
VOID* StandardOutput;
VOID* StandardError;
struct _CURDIR CurrentDirectory; // 2 elements, 0x18 bytes (sizeof)
struct _UNICODE_STRING DllPath; // 3 elements, 0x10 bytes (sizeof)
struct _UNICODE_STRING ImagePathName; // 3 elements, 0x10 bytes (sizeof)
struct _UNICODE_STRING CommandLine; // 3 elements, 0x10 bytes (sizeof)
VOID* Environment;
ULONG32 StartingX;
ULONG32 StartingY;
ULONG32 CountX;
ULONG32 CountY;
ULONG32 CountCharsX;
ULONG32 CountCharsY;
ULONG32 FillAttribute;
ULONG32 WindowFlags;
ULONG32 ShowWindowFlags;
UINT8 _PADDING1_[0x4];
struct _UNICODE_STRING WindowTitle; // 3 elements, 0x10 bytes (sizeof)
struct _UNICODE_STRING DesktopInfo; // 3 elements, 0x10 bytes (sizeof)
struct _UNICODE_STRING shellInfo; // 3 elements, 0x10 bytes (sizeof)
struct _UNICODE_STRING RuntimeData; // 3 elements, 0x10 bytes (sizeof)
struct _RTL_DRIVE_LETTER_CURDIR CurrentDirectores[32];
UINT64 EnvironmentSize;
UINT64 EnvironmentVersion;
VOID* PackageDependencyData;
ULONG32 ProcessGroupId;
ULONG32 LoaderThreads;
struct _UNICODE_STRING RedirectionDllName; // 3 elements, 0x10 bytes (sizeof)
struct _UNICODE_STRING HeapPartitionName; // 3 elements, 0x10 bytes (sizeof)
UINT64* DefaultThreadpoolCpuSetMasks;
ULONG32 DefaultThreadpoolCpuSetMaskCount;
UINT8 _PADDING2_[0x4];
}RTL_USER_PROCESS_PARAMETERS, *PRTL_USER_PROCESS_PARAMETERS;
typedef struct _PEB_LDR_DATA // 9 elements, 0x58 bytes (sizeof)
{
ULONG32 Length;
UINT8 Initialized;
UINT8 _PADDING0_[0x3];
VOID* sshandle;
struct _LIST_ENTRY InLoadOrderModuleList; // 2 elements, 0x10 bytes (sizeof)
struct _LIST_ENTRY InMemoryOrderModuleList; // 2 elements, 0x10 bytes (sizeof)
struct _LIST_ENTRY InInitializationOrderModuleList; // 2 elements, 0x10 bytes (sizeof)
VOID* EntryInProgress;
UINT8 ShutdownInProgress;
UINT8 _PADDING1_[0x7];
VOID* ShutdownThreadId;
}PEB_LDR_DATA, *PPEB_LDR_DATA;
typedef struct _PEB64
{
UCHAR InheritedAddressSpace;
UCHAR ReadImageFileExecOptions;
UCHAR BeingDebugged;
UCHAR BitField;
ULONG64 Mutant;
ULONG64 ImageBaseAddress;
PPEB_LDR_DATA Ldr;
PRTL_USER_PROCESS_PARAMETERS ProcessParameters;
ULONG64 SubSystemData;
ULONG64 ProcessHeap;
ULONG64 FastPebLock;
ULONG64 AtlThunkSListPtr;
ULONG64 IFEOKey;
ULONG64 CrossProcessFlags;
ULONG64 UserSharedInfoPtr;
ULONG SystemReserved;
ULONG AtlThunkSListPtr32;
ULONG64 apiSetMap;
} PEB64, *PPEB64;
#pragma pack(4)
typedef struct _PEB32
{
UCHAR InheritedAddressSpace;
UCHAR ReadImageFileExecOptions;
UCHAR BeingDebugged;
UCHAR BitField;
ULONG Mutant;
ULONG ImageBaseAddress;
ULONG Ldr;
ULONG ProcessParameters;
ULONG SubSystemData;
ULONG ProcessHeap;
ULONG FastPebLock;
ULONG AtlThunkSListPtr;
ULONG IFEOKey;
ULONG CrossProcessFlags;
ULONG UserSharedInfoPtr;
ULONG SystemReserved;
ULONG AtlThunkSListPtr32;
ULONG ApiSetMap;
} PEB32, *PPEB32;
typedef struct _PEB_LDR_DATA32
{
ULONG Length;
BOOLEAN Initialized;
ULONG SsHandle;
LIST_ENTRY32 InLoadOrderModuleList;
LIST_ENTRY32 InMemoryOrderModuleList;
LIST_ENTRY32 InInitializationOrderModuleList;
ULONG EntryInProgress;
} PEB_LDR_DATA32, *PPEB_LDR_DATA32;
typedef struct _LDR_DATA_TABLE_ENTRY32
{
LIST_ENTRY32 InLoadOrderLinks;
LIST_ENTRY32 InMemoryOrderModuleList;
LIST_ENTRY32 InInitializationOrderModuleList;
ULONG DllBase;
ULONG EntryPoint;
ULONG SizeOfImage;
UNICODE_STRING32 FullDllName;
UNICODE_STRING32 BaseDllName;
ULONG Flags;
USHORT LoadCount;
USHORT TlsIndex;
uNIOn
{
LIST_ENTRY32 HashLinks;
ULONG SectionPointer;
}u1;
ULONG CheckSum;
union
{
ULONG TimeDateStamp;
ULONG LoadedImports;
}u2;
ULONG EntryPointActivationContext;
ULONG PatchInformation;
} LDR_DATA_TABLE_ENTRY32, *PLDR_DATA_TABLE_ENTRY32;
#pragma pack()
接着就来实现对PEB的获取操作，以64位为例，我们需要调用PsGetProcessPeb()这个内核函数，因为该内核函数没有被公开所以调用之前需要头部导出，该函数需要传入用户进程的EProcess结构，该结构可用PsLookupProcessByProcessId函数动态获取到，获取到以后直接KeStackAttachProcess()附加到应用层进程上，即可直接输出进程的PEB结构信息，如下代码。
#include "peb.h"
#include <ntifs.h>
// 定义导出
NTKERNELAPI PVOID NTAPI PsGetProcessPeb(_In_ PEPROCESS Process);
VOID UnDriver(PDRIVER_OBJECT driver)
{
DbgPrint(("Uninstall Driver Is OK \n"));
}
// LyShark
NTSTATUS DriverEntry(IN PDRIVER_OBJECT Driver, PUNICODE_STRING ReGIStryPath)
{
DbgPrint("hello lyshark \n");
NTSTATUS status = STATUS_UNSUCCESSFUL;
PEPROCESS eproc = NULL;
KAPC_STATE kpc = { 0 };
PPEB64 pPeb64 = NULL;
__try
{
// HANDLE)4656 进程PID
status = PsLookupProcessByProcessId((HANDLE)4656, &eproc);
// 得到64位PEB
pPeb64 = (PPEB64)PsGetProcessPeb(eproc);
DbgPrint("PEB64 = %p \n", pPeb64);
if (pPeb64 != 0)
{
// 验证可读性
ProbeForRead(pPeb64, sizeof(PEB32), 1);
// 附加进程
KeStackAttachProcess(eproc, &kpc);
DbgPrint("进程基地址: 0x%p \n", pPeb64->ImageBaseAddress);
DbgPrint("ProcessHeap = 0x%p \n", pPeb64->ProcessHeap);
DbgPrint("BeingDebugged = %d \n", pPeb64->BeingDebugged);
// 脱离进程
KeUnstackDetachProcess(&kpc);
}
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
Driver->DriverUnload = UnDriver;
return STATUS_SUCCESS;
}
Driver->DriverUnload = UnDriver;
return STATUS_SUCCESS;
}
PEB64代码运行后，我们加载驱动即可看到如下结果:
而相对于64位进程来说，获取32位进程的PEB信息可以直接调用PsGetProcessWow64Process()函数得到，该函数已被导出可以任意使用，获取PEB代码如下。
#include "peb.h"
#include <ntifs.h>
// 定义导出
NTKERNELAPI PVOID NTAPI PsGetProcessPeb(_In_ PEPROCESS Process);
VOID UnDriver(PDRIVER_OBJECT driver)
{
DbgPrint(("Uninstall Driver Is OK \n"));
}
// LyShark
NTSTATUS DriverEntry(IN PDRIVER_OBJECT Driver, PUNICODE_STRING RegistryPath)
{
DbgPrint("hello lyshark \n");
NTSTATUS status = STATUS_UNSUCCESSFUL;
PEPROCESS eproc = NULL;
KAPC_STATE kpc = { 0 };
PPEB32 pPeb32 = NULL;
__try
{
// HANDLE)4656 进程PID
status = PsLookupProcessByProcessId((HANDLE)6164, &eproc);
// 得到32位PEB
pPeb32 = (PPEB32)PsGetProcessWow64Process(eproc);
DbgPrint("PEB32 = %p \n", pPeb32);
if (pPeb32 != 0)
{
// 验证可读性
ProbeForRead(pPeb32, sizeof(PEB32), 1);
// 附加进程
KeStackAttachProcess(eproc, &kpc);
DbgPrint("进程基地址: 0x%p \n", pPeb32->ImageBaseAddress);
DbgPrint("ProcessHeap = 0x%p \n", pPeb32->ProcessHeap);
DbgPrint("BeingDebugged = %d \n", pPeb32->BeingDebugged);
// 脱离进程
KeUnstackDetachProcess(&kpc);
}
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
Driver->DriverUnload = UnDriver;
return STATUS_SUCCESS;
}
Driver->DriverUnload = UnDriver;
return STATUS_SUCCESS;
}
PEB32代码运行后，我们加载驱动即可看到如下结果:
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