効果的なテストミュータントのためには、それを処理し、マスクにアクセスする必要があります。構造から取得できますSYSTEM_HANDLE_INFORMATION_EX
。すでに持っている場合MUTANT_QUERY_STATE
- クエリを指示できます。ない場合 - ハンドルを再度開く必要がありますMUTANT_QUERY_STATE
NTSTATUS QueryMutant(HANDLE hMutant, ULONG GrantedAccess, MUTANT_BASIC_INFORMATION* pmbi)
{
if (GrantedAccess & MUTANT_QUERY_STATE)
{
return ZwQueryMutant(hMutant, MutantBasicInformation, pmbi, sizeof(MUTANT_BASIC_INFORMATION), 0);
}
NTSTATUS status = ZwDuplicateObject(NtCurrentProcess(), hMutant, NtCurrentProcess(),&hMutant,
MUTANT_QUERY_STATE, 0, 0);
if (0 <= status)
{
status = ZwQueryMutant(hMutant, MutantBasicInformation, pmbi, sizeof(MUTANT_BASIC_INFORMATION), 0);
ZwClose(hMutant);
}
return status;
}
また、確定型のハンドルに常に NtQueryObject を使用する必要はありません。使用できますSYSTEM_HANDLE_TABLE_ENTRY_INFO_EX.ObjectTypeIndex
。このインデックスでOBJECT_TYPE_INFORMATIONを取得します。このためには、開始時に1回呼び出すだけで済みますが、配列インデックスZwQueryObject(0, ObjectAllTypeInformation, )
に変換する方法に問題がありSYSTEM_HANDLE_TABLE_ENTRY_INFO_EX.ObjectTypeIndex
ます(ゼロベース)。win8.1 から開始 'OBJECT_TYPE_INFORMATION.TypeIndex' は有効で に一致しますが、初期バージョンでは、既知のオブジェクト タイプと計算デルタをSYSTEM_HANDLE_TABLE_ENTRY_INFO_EX.ObjectTypeIndex
一度取得する必要がありますSYSTEM_HANDLE_TABLE_ENTRY_INFO_EX.ObjectTypeIndex
static volatile UCHAR guz;
NTSTATUS getProcessIndex(USHORT& ObjectTypeIndex)
{
HANDLE hProcess;
NTSTATUS status = ZwDuplicateObject(NtCurrentProcess(), NtCurrentProcess(), NtCurrentProcess(), &hProcess, 0, 0, DUPLICATE_SAME_ACCESS);
if (0 <= status)
{
PVOID stack = alloca(guz);
DWORD cb = 0, rcb = 0x10000;
union {
PVOID buf;
PSYSTEM_HANDLE_INFORMATION_EX pshti;
};
do
{
if (cb < rcb) cb = RtlPointerToOffset(buf = alloca(rcb - cb), stack);
if (0 <= (status = ZwQuerySystemInformation(SystemExtendedHandleInformation, buf, cb, &rcb)))
{
if (ULONG NumberOfHandles = (ULONG)pshti->NumberOfHandles)
{
PSYSTEM_HANDLE_TABLE_ENTRY_INFO_EX Handles = pshti->Handles;
ULONG_PTR UniqueProcessId = GetCurrentProcessId();
do
{
if (Handles->UniqueProcessId == UniqueProcessId && (HANDLE)Handles->HandleValue == hProcess)
{
ObjectTypeIndex = Handles->ObjectTypeIndex;
goto __break;
}
} while (Handles++, --NumberOfHandles);
}
}
} while (STATUS_INFO_LENGTH_MISMATCH == status);
__break:
ZwClose(hProcess);
}
return status;
}
class ZOBJECT_ALL_TYPES_INFORMATION
{
OBJECT_TYPE_INFORMATION* _TypeInformation;
DWORD _NumberOfTypes, _TypeIndexDelta;
public:
operator DWORD()
{
return _NumberOfTypes;
}
operator OBJECT_TYPE_INFORMATION*()
{
return _TypeInformation;
}
DWORD operator[](OBJECT_TYPE_INFORMATION* TypeInformation)
{
return (DWORD)(TypeInformation - _TypeInformation) + _TypeIndexDelta;
}
OBJECT_TYPE_INFORMATION* operator[](DWORD Index)
{
return Index < _NumberOfTypes ? _TypeInformation + Index : 0;
}
ULONG TypeIndexToIndex(DWORD ObjectTypeIndex)
{
return ObjectTypeIndex -= _TypeIndexDelta;
}
OBJECT_TYPE_INFORMATION* operator[](PCUNICODE_STRING TypeName);
ZOBJECT_ALL_TYPES_INFORMATION();
~ZOBJECT_ALL_TYPES_INFORMATION();
};
ZOBJECT_ALL_TYPES_INFORMATION g_AOTI;
OBJECT_TYPE_INFORMATION* ZOBJECT_ALL_TYPES_INFORMATION::operator[](PCUNICODE_STRING TypeName)
{
if (DWORD NumberOfTypes = _NumberOfTypes)
{
OBJECT_TYPE_INFORMATION* TypeInformation = _TypeInformation;
do
{
if (RtlEqualUnicodeString(TypeName, &TypeInformation->TypeName, TRUE))
{
return TypeInformation;
}
} while (TypeInformation++, -- NumberOfTypes);
}
return 0;
}
ZOBJECT_ALL_TYPES_INFORMATION::ZOBJECT_ALL_TYPES_INFORMATION()
{
_TypeInformation = 0, _NumberOfTypes = 0;
USHORT ProcessTypeIndex;
if (0 > getProcessIndex(ProcessTypeIndex))
{
return ;
}
NTSTATUS status;
PVOID stack = alloca(guz);
union {
PVOID pv;
OBJECT_TYPES_INFORMATION* poati;
};
DWORD cb = 0, rcb = 0x2000;
do
{
if (cb < rcb)
{
cb = RtlPointerToOffset(pv = alloca(rcb - cb), stack);
}
if (0 <= (status = ZwQueryObject(0, ObjectAllTypeInformation, poati, cb, &rcb)))
{
if (DWORD NumberOfTypes = poati->NumberOfTypes)
{
if (OBJECT_TYPE_INFORMATION* TypeInformation = (OBJECT_TYPE_INFORMATION*)LocalAlloc(0, rcb))
{
_NumberOfTypes = NumberOfTypes;
_TypeInformation = TypeInformation;
ULONG Index = 0;
union {
ULONG_PTR uptr;
OBJECT_TYPE_INFORMATION* pti;
};
union {
PWSTR buf;
PBYTE pb;
PVOID pv;
};
pti = poati->TypeInformation;
pv = TypeInformation + NumberOfTypes;
do
{
STATIC_UNICODE_STRING_(Process);
if (RtlEqualUnicodeString(&Process, &pti->TypeName, TRUE))
{
_TypeIndexDelta = ProcessTypeIndex - Index;
}
ULONG Length = pti->TypeName.Length, MaximumLength = pti->TypeName.MaximumLength;
memcpy(buf, pti->TypeName.Buffer, Length);
*TypeInformation = *pti;
TypeInformation++->TypeName.Buffer = buf;
pb += Length;
uptr += (sizeof(OBJECT_TYPE_INFORMATION) + MaximumLength + sizeof(PVOID)-1) & ~ (sizeof(PVOID)-1);
} while (Index++, --NumberOfTypes);
}
}
}
} while (status == STATUS_INFO_LENGTH_MISMATCH);
}
ZOBJECT_ALL_TYPES_INFORMATION::~ZOBJECT_ALL_TYPES_INFORMATION()
{
if (_TypeInformation)
{
LocalFree(_TypeInformation);
}
}
最後に、NtQueryObject を使用せずに次のコードを使用します。
void TestMutant()
{
NTSTATUS status;
PVOID stack = alloca(guz);
DWORD cb = 0, rcb = 0x10000;
union {
PVOID buf;
PSYSTEM_HANDLE_INFORMATION_EX pshti;
};
do
{
if (cb < rcb) cb = RtlPointerToOffset(buf = alloca(rcb - cb), stack);
if (0 <= (status = ZwQuerySystemInformation(SystemExtendedHandleInformation, buf, cb, &rcb)))
{
if (ULONG NumberOfHandles = (ULONG)pshti->NumberOfHandles)
{
PSYSTEM_HANDLE_TABLE_ENTRY_INFO_EX Handles = pshti->Handles;
ULONG_PTR UniqueProcessId = GetCurrentProcessId();
do
{
if (Handles->UniqueProcessId == UniqueProcessId)
{
if (OBJECT_TYPE_INFORMATION* poti = g_AOTI[g_AOTI.TypeIndexToIndex(Handles->ObjectTypeIndex)])
{
STATIC_UNICODE_STRING_(Mutant);
if (RtlEqualUnicodeString(&Mutant, &poti->TypeName, TRUE))
{
MUTANT_BASIC_INFORMATION mbi;
QueryMutant((HANDLE)Handles->HandleValue, Handles->GrantedAccess, &mbi);
}
}
}
} while (Handles++, --NumberOfHandles);
}
}
} while (STATUS_INFO_LENGTH_MISMATCH == status);
}
でテストできます
void Az()
{
HANDLE hMutant;
if (0 <= ZwCreateMutant(&hMutant, SYNCHRONIZE, 0, TRUE))
{
TestMutant();
ZwClose(hMutant);
}
}