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C语言驱动开发之内核通过PEB获取进程参数

摘要

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

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:

到此这篇关于C语言驱动开发之内核通过PEB获取进程参数的文章就介绍到这了,更多相关C语言驱动开发获取进程参数内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网!

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