驱动开发:内核无痕隐藏自身分析

在笔者前面有一篇文章《驱动开发:断链隐藏驱动程序自身》通过摘除驱动的链表实现了断链隐藏自身的目的,但此方法恢复时会触发PG会蓝屏,偶然间在网上找到了一个作者介绍的一种方法,觉得有必要详细分析一下他是如何实现的进程隐藏的,总体来说作者的思路是最终寻找到MiProcessLoaderEntry的入口地址,该函数的作用是将驱动信息加入链表和移除链表,运用这个函数即可动态处理驱动的添加和移除问题。

  • MiProcessLoaderEntry(pDriverObject->DriverSection, 1) 添加
  • MiProcessLoaderEntry(pDriverObject->DriverSection, 0) 移除

那么如何找到MiProcessLoaderEntry函数入口地址就是下一步的目标,寻找入口可以总结为;

  • 1.寻找MmUnloadSystemImage函数地址,可通过MmGetSystemRoutineAddress函数得到。
  • 2.在MmUnloadSystemImage里面寻找MiUnloadSystemImage函数地址。
  • 3.在MiUnloadSystemImage里面继续寻找MiProcessLoaderEntry即可。

搜索MmUnloadSystemImage可定位到call nt!MiUnloadSystemImage地址。

驱动开发:内核无痕隐藏自身分析插图

搜索MiUnloadSystemImage定位到call nt!MiProcessLoaderEntry即得到了我们想要的。

驱动开发:内核无痕隐藏自身分析插图1

根据前面枚举篇系列文章,定位这段特征很容易实现,如下是一段参考代码。

// PowerBy: LyShark
// Email: me@lyshark.com

#include 
#include 

typedef NTSTATUS(__fastcall *MiProcessLoaderEntry)(PVOID pDriverSection, BOOLEAN bLoad);

// 取出指定函数地址
PVOID GetProcAddress(WCHAR *FuncName)
{
    UNICODE_STRING u_FuncName = { 0 };
    PVOID ref = NULL;

    RtlInitUnicodeString(&u_FuncName, FuncName);
    ref = MmGetSystemRoutineAddress(&u_FuncName);

    if (ref != NULL)
    {
        return ref;
    }

    return ref;
}

// 特征定位 MiUnloadSystemImage
ULONG64 GetMiUnloadSystemImageAddress()
{
    // 在MmUnloadSystemImage函数中搜索的Code
    /*
    lyshark.com: kd> uf MmUnloadSystemImage
        fffff801`37943512 83caff          or      edx,0FFFFFFFFh
        fffff801`37943515 488bcf          mov     rcx,rdi
        fffff801`37943518 488bd8          mov     rbx,rax
        fffff8013794351b e860b4ebff      call    nt!MiUnloadSystemImage (fffff801377fe980)
    */
    CHAR MmUnloadSystemImage_Code[] = "x83xCAxFF"  // or      edx, 0FFFFFFFFh
        "x48x8BxCF"                                // mov     rcx, rdi
        "x48x8BxD8"                                // mov     rbx, rax
        "xE8";                                       // call    nt!MiUnloadSystemImage (fffff801`377fe980)

    ULONG_PTR MmUnloadSystemImageAddress = 0;
    ULONG_PTR MiUnloadSystemImageAddress = 0;
    ULONG_PTR StartAddress = 0;

    MmUnloadSystemImageAddress = (ULONG_PTR)GetProcAddress(L"MmUnloadSystemImage");
    if (MmUnloadSystemImageAddress == 0)
    {
        return 0;
    }

    // 在MmUnloadSystemImage中搜索特征码寻找MiUnloadSystemImage
    StartAddress = MmUnloadSystemImageAddress;
    while (StartAddress  uf MiUnloadSystemImage
            fffff801`377fed19 33d2            xor     edx,edx
            fffff801`377fed1b 488bcb          mov     rcx,rbx
            fffff801377fed1e e84162b4ff      call    nt!MiProcessLoaderEntry (fffff80137344f64)
            fffff801377fed23 8b05d756f7ff    mov     eax,dword ptr [nt!PerfGlobalGroupMask (fffff80137774400)]
            fffff801`377fed29 a804            test    al,4
            fffff801377fed2b 7440            je      nt!MiUnloadSystemImage+0x3ed (fffff801377fed6d)  Branch
            E8 call | 8B 05 mov eax
        */

        // fffff801377fed1e   | fffff801377fed23
        // 判断特征 0xE8(call) | 0x8B 0x05(mov eax)
        if (*(UCHAR*)StartAddress == 0xE8 && *(UCHAR *)(StartAddress + 5) == 0x8B && *(UCHAR *)(StartAddress + 6) == 0x05)
        {
            // 跳过一个字节call的E8
            StartAddress++;

            // StartAddress + 1 + 4
            return (MiProcessLoaderEntry)(*(LONG*)StartAddress + StartAddress + 4);
        }
        ++StartAddress;
    }
    return NULL;
}

VOID UnDriver(PDRIVER_OBJECT driver)
{
    DbgPrint("卸载完成... n");
}

NTSTATUS DriverEntry(IN PDRIVER_OBJECT Driver, PUNICODE_STRING RegistryPath)
{
    DbgPrint("hello lyshark.com n");

    ULONG64 MiUnloadSystemImageAddress = GetMiUnloadSystemImageAddress();
    DbgPrint("MiUnloadSystemImageAddress = %p n", MiUnloadSystemImageAddress);

    MiProcessLoaderEntry MiProcessLoaderEntryAddress = GetMiProcessLoaderEntry(MiUnloadSystemImageAddress);
    DbgPrint("MiProcessLoaderEntryAddress = %p n", (ULONG64)MiProcessLoaderEntryAddress);

    Driver->DriverUnload = UnDriver;
    return STATUS_SUCCESS;
}

运行驱动程序,即可得到MiProcessLoaderEntryAddress的内存地址。

驱动开发:内核无痕隐藏自身分析插图2

得到内存地址之后,直接破坏掉自身驱动的入口地址等,即可实现隐藏自身。

// PowerBy: LyShark
// Email: me@lyshark.com
#include 
#include 

typedef NTSTATUS(*NTQUERYSYSTEMINFORMATION)(
  IN ULONG SystemInformationClass,
  OUT PVOID   SystemInformation,
  IN ULONG_PTR    SystemInformationLength,
  OUT PULONG_PTR  ReturnLength OPTIONAL);

NTSYSAPI NTSTATUS NTAPI ObReferenceObjectByName(
  __in PUNICODE_STRING ObjectName,
  __in ULONG Attributes,
  __in_opt PACCESS_STATE AccessState,
  __in_opt ACCESS_MASK DesiredAccess,
  __in POBJECT_TYPE ObjectType,
  __in KPROCESSOR_MODE AccessMode,
  __inout_opt PVOID ParseContext,
  __out PVOID* Object
  );

typedef struct _SYSTEM_MODULE_INFORMATION
{
  HANDLE Section;
  PVOID MappedBase;
  PVOID Base;
  ULONG Size;
  ULONG Flags;
  USHORT LoadOrderIndex;
  USHORT InitOrderIndex;
  USHORT LoadCount;
  USHORT PathLength;
  CHAR ImageName[256];
} SYSTEM_MODULE_INFORMATION, *PSYSTEM_MODULE_INFORMATION;

typedef struct _LDR_DATA_TABLE_ENTRY
{
  LIST_ENTRY InLoadOrderLinks;
  LIST_ENTRY InMemoryOrderLinks;
  LIST_ENTRY InInitializationOrderLinks;
  PVOID      DllBase;
  PVOID      EntryPoint;
}LDR_DATA_TABLE_ENTRY, *PLDR_DATA_TABLE_ENTRY;

extern POBJECT_TYPE *IoDriverObjectType;
typedef NTSTATUS(__fastcall *MiProcessLoaderEntry)(PVOID pDriverSection, BOOLEAN bLoad);
ULONG64 MiUnloadSystemImageAddress = 0;

// 取出指定函数地址
PVOID GetProcAddress(WCHAR *FuncName)
{
    UNICODE_STRING u_FuncName = { 0 };
    PVOID ref = NULL;

    RtlInitUnicodeString(&u_FuncName, FuncName);
    ref = MmGetSystemRoutineAddress(&u_FuncName);

    if (ref != NULL)
    {
    return ref;
    }

    return ref;
}

// 特征定位 MiUnloadSystemImage
ULONG64 GetMiUnloadSystemImageAddress()
{
    CHAR MmUnloadSystemImage_Code[] = "x83xCAxFFx48x8BxCFx48x8BxD8xE8";

    ULONG_PTR MmUnloadSystemImageAddress = 0;
    ULONG_PTR MiUnloadSystemImageAddress = 0;
    ULONG_PTR StartAddress = 0;

    MmUnloadSystemImageAddress = (ULONG_PTR)GetProcAddress(L"MmUnloadSystemImage");
    if (MmUnloadSystemImageAddress == 0)
    {
    return 0;
    }

    // 在MmUnloadSystemImage中搜索特征码寻找MiUnloadSystemImage
    StartAddress = MmUnloadSystemImageAddress;
    while (StartAddress DriverSection;
    LdrEntry->DllBase = Object->DriverStart;
    ObDereferenceObject(Object);
    return TRUE;
}

VOID InitInLoadOrderLinks(PLDR_DATA_TABLE_ENTRY LdrEntry)
{
    InitializeListHead(&LdrEntry->InLoadOrderLinks);
    InitializeListHead(&LdrEntry->InMemoryOrderLinks);
}

VOID Reinitialize(PDRIVER_OBJECT DriverObject, PVOID Context, ULONG Count)
{
    MiProcessLoaderEntry m_MiProcessLoaderEntry = NULL;
    ULONG *p = NULL;

    m_MiProcessLoaderEntry = GetMiProcessLoaderEntry(MiUnloadSystemImageAddress);
    if (m_MiProcessLoaderEntry == NULL)
    {
        return;
    }

    SupportSEH(DriverObject);

    m_MiProcessLoaderEntry(DriverObject->DriverSection, 0);
    InitInLoadOrderLinks((PLDR_DATA_TABLE_ENTRY)DriverObject->DriverSection);

    // 破坏驱动对象特征
    DriverObject->DriverSection = NULL;
    DriverObject->DriverStart = NULL;
    DriverObject->DriverSize = 0;
    DriverObject->DriverUnload = NULL;
    DriverObject->DriverInit = NULL;
    DriverObject->DeviceObject = NULL;

    DbgPrint("驱动隐藏 n");
}

VOID UnDriver(PDRIVER_OBJECT driver)
{
  DbgPrint("卸载完成... n");
}

NTSTATUS DriverEntry(IN PDRIVER_OBJECT Driver, PUNICODE_STRING RegistryPath)
{
    DbgPrint("hello lyshark.com n");

    MiUnloadSystemImageAddress = GetMiUnloadSystemImageAddress();
    MiProcessLoaderEntry MiProcessLoaderEntryAddress = GetMiProcessLoaderEntry(MiUnloadSystemImageAddress);

    // 无痕隐藏
    IoRegisterDriverReinitialization(Driver, Reinitialize, NULL);

    Driver->DriverUnload = UnDriver;
    return STATUS_SUCCESS;
}

运行驱动程序,让后看到如下输出信息;

驱动开发:内核无痕隐藏自身分析插图3

参考文献

https://blog.csdn.net/zhuhuibeishadiao/article/details/75658816
https://github.com/ZhuHuiBeiShaDiao/NewHideDriverEx

文章来源于互联网:驱动开发:内核无痕隐藏自身分析

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