警告 - 这些都不是官方支持的。使用了未记录的函数!
基于NtAreMappedFilesTheSame
存在100%干净的解决方案。
NTSYSAPI
NTSTATUS
NTAPI
NtAreMappedFilesTheSame (
__in PVOID File1MappedAsAnImage,
__in PVOID File2MappedAsFile
);
总的来说,我们需要做以下几件事情:
- 获取exe/dll文件的File1MappedAsAnImage地址
- 使用
ZwQueryVirtualMemory
(,MemoryMappedFilenameInformation
,)获取文件名(以本地格式显示)。注意:MemoryMappedFilenameInformation
总是返回调用时的当前文件名,所以如果文件已经重命名,我们将得到它的新名称。
- 按给定的名称打开文件
- 映射文件并获得File2MappedAsFile
- 调用NtAreMappedFilesTheSame(File1MappedAsAnImage, File2MappedAsFile)
- 如果我们得到
STATUS_SUCCESS
,则打开正确的文件 - 完成
- 如果我们得到
STATUS_NOT_SAME_DEVICE
,则需要取消映射File2MappedAsFile并返回第2步
- 如果我们得到其他状态,则发生了一些错误
这里是完整的工作示例:
NTSTATUS MapModule(void* File1MappedAsAnImage, void** pFile2MappedAsFile)
{
static volatile UCHAR guz;
PVOID stack = alloca(guz);
union {
PVOID buf;
PUNICODE_STRING FileName;
};
SIZE_T cb = 0, rcb = 256, ViewSize;
NTSTATUS status, s = STATUS_UNSUCCESSFUL;
BOOL bSame;
do
{
bSame = TRUE;
do
{
if (cb < rcb)
{
cb = RtlPointerToOffset(buf = alloca(rcb - cb), stack);
}
if (0 <= (status = NtQueryVirtualMemory(NtCurrentProcess(), File1MappedAsAnImage, MemoryMappedFilenameInformation, buf, cb, &rcb)))
{
DbgPrint("%wZ\n", FileName);
OBJECT_ATTRIBUTES oa = { sizeof(oa), 0, FileName, OBJ_CASE_INSENSITIVE };
HANDLE hFile, hSection;
IO_STATUS_BLOCK iosb;
if (0 <= (s = NtOpenFile(&hFile, FILE_GENERIC_READ, &oa, &iosb, FILE_SHARE_VALID_FLAGS, FILE_SYNCHRONOUS_IO_NONALERT)))
{
s = ZwCreateSection(&hSection, SECTION_MAP_READ, 0, 0, PAGE_READONLY, SEC_COMMIT, hFile);
NtClose(hFile);
if (0 <= s)
{
*pFile2MappedAsFile = 0;
s = ZwMapViewOfSection(hSection, NtCurrentProcess(), pFile2MappedAsFile, 0, 0, 0, &(ViewSize = 0), ViewUnmap, 0, PAGE_READONLY);
NtClose(hSection);
if (0 <= s)
{
switch (s = NtAreMappedFilesTheSame(File1MappedAsAnImage, *pFile2MappedAsFile))
{
case STATUS_SUCCESS:
DbgPrint("opened original file!");
return STATUS_SUCCESS;
case STATUS_NOT_SAME_DEVICE:
DbgPrint("opened another file!");
bSame = FALSE;
break;
default:
DbgPrint("status = %x\n", s);
}
ZwUnmapViewOfSection(NtCurrentProcess(), *pFile2MappedAsFile);
}
}
}
}
} while (status == STATUS_BUFFER_OVERFLOW);
} while (!bSame);
return status < 0 ? status : s;
}
void Demo()
{
PVOID BaseAddress;
if (0 <= MapModule(GetModuleHandle(0), &BaseAddress))
{
ZwUnmapViewOfSection(NtCurrentProcess(), BaseAddress);
}
}
同时您也可以查找此主题