再谈进程与端口的映射
关于进程与端口映射的文章曾经有许多了,我把我对fport的分析也写出来,让各人知道fport是怎样工作的.
fport.exe是由foundstone team出品的免费软件,可以列出系统中所有开放的端口都是由那些进程翻开的.而下
面所形貌的要领是基于fport v1.33的,要是和你机器上的fport有收支,请查抄fport版本.
首先,它检测以后用户是否拥有管理员权限(通过读取以后进程的令牌可知以后用户是否具有管理权限,请参考
相关历程),要是没有,打印一句提示后退出,然后设置以后进程的令牌,接着,用ZwOpenSection函数翻开内核对象
\Device\PhysicalMemory,这个对象用于对系统物理内存的拜访.ZwOpenSection函数的原型如下:
NTSYSAPI
NTSTSTUS
NTAPI
ZwOpenSection(
Out PHANDLE sectionHandle;
IN ACCESS_MASK DesiredAccess;
IN POBJECT_ATTRIBUTES ObjectAttributes
};
(见ntddk.h)
第一个参数得到函数实行乐成后的句柄
第二个参数DesiredAccess为一个常数,可以是下列值:
#define SECTION_QUERY 0x0001
#define SECTION_MAP_WRITE 0x0002
#define SECTION_MAP_READ 0x0004
#define SECTION_MAP_EXECUTE 0x0008
#define SECTION_EXTEND_SIZE 0x0010
#define SECTION_ALL_ACCESS (STANDARD_RIGHTS_REQUIRED|SECTION_QUERY|\
SECTION_MAP_WRITE | \
SECTION_MAP_READ | \
SECTION_MAP_EXECUTE | \
SECTION_EXTEND_SIZE)
(见ntddk.h)
第三个参数是一个布局,包罗要翻开的对象范例等信息,布局界说如下:
typedef struct _OBJECT_ATTRIBUTES {
ULONG Length;
HANDLE RootDirectory;
PUNICODE_STRING ObjectName;
ULONG Attributes;
PVOID SecurityDescriptor; // Points to type SECURITY_DESCRIPTOR
PVOID SecurityQualityOfService; // Points to type SECURITY_QUALITY_OF_SERVICE
} OBJECT_ATTRIBUTES;
typedef OBJECT_ATTRIBUTES *POBJECT_ATTRIBUTES;
(见ntdef.h)
对于这个布局的初始化用一个宏完成:
#define InitializeObjectAttributes( p, n, a, r, s ) { \
(p)->Length = sizeof( OBJECT_ATTRIBUTES ); \
(p)->RootDirectory = r; \
(p)->Attributes = a; \
(p)->ObjectName = n; \
(p)->SecurityDescriptor = s; \
(p)->SecurityQualityOfService = NULL; \
}
(见ntdef.h)
那么,翻开内核对象\Device\PhysicalMemory的语句如下:
WCHAR PhysmemName[] = L"\\Device\\PhysicalMemory";
void * pMapPhysicalMemory;
HANDLE pHandle;
bool OpenPhysicalMemory()
{
NTSTATUS status;
UNICODE_STRING physmemString;
OBJECT_ATTRIBUTES attributes;
RtlInitUnicodeString( &physmemString, PhysmemName ); //初始化Unicode字符串,函数原型见ntddk.h
InitializeObjectAttributes( &attributes, &physmemString,
OBJ_CASE_INSENSITIVE, NULL, NULL ); //初始化OBJECT_ATTRIBUTES布局
status = ZwOpenSection(pHandle, SECTION_MAP_READ, &attributes ); //翻开内核对象\Device\PhysicalMemory,获得句柄
if( !NT_SUCCESS( status ))
return false;
pMapPhysicalMemory=MapViewOfFile(pHandle,FILE_MAP_READ,
0,0x30000,0x1000);
//从内存地点0x30000开端映射0x1000个字节
if( GetLastError()!=0)
return false;
return true;
}
为什么要从0x30000开端映射呢,是如许,我们知道,在Windows NT/2000下,系统分为内核形式和用户形式,也便是我们
所说的Ring0和Ring3,在Windows NT/2000下,我们所可以或许看到的进程都运转在Ring3下,一般环境下,系统进程(也便是System
进程)的页目次(PDE)地点物理地点地点为0x30000,或者说,系统中最小的页目次地点的物理地点为0x30000.而页目次(PDE)由
1024项构成,每项均指向一页表(PTE),每一页表也由1024个页构成,而每页的大小为4K,1024*4=4096(0x1000),以是,上面从物
理地点0x30000开端映射了0x1000个字节.(详细形貌见WebCrazy的文章<<小议Windows NT/2000的分页机制>>)
程序翻开翻开内核对象\Device\PhysicalMemory后,连续用函数ZwOpenFile翻开内核对象\Device\Tcp和Device\Udp,ZwOpenFile
函数的原型如下:
NTSYSAPI
NTSTATUS
NTAPI
ZwOpenFile(
OUT PHANDLE FileHandle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes,
OUT PIO_STATUS_BLOCK IoStatusBlock,
IN ULONG ShareAccess,
IN ULONG OpenOptions
);
(见ntddk.h)
第一个参数前往翻开对象的句柄
第二个参数DesiredAccess为一个常数,可以是下列值:
#define FILE_READ_DATA ( 0x0001 ) // file & pipe
#define FILE_LIST_DIRECTORY ( 0x0001 ) // directory
#define FILE_WRITE_DATA ( 0x0002 ) // file & pipe
#define FILE_ADD_FILE ( 0x0002 ) // directory
#define FILE_APPEND_DATA ( 0x0004 ) // file
#define FILE_ADD_SUBDIRECTORY ( 0x0004 ) // directory
#define FILE_CREATE_PIPE_INSTANCE ( 0x0004 ) // named pipe
#define FILE_READ_EA ( 0x0008 ) // file & directory
#define FILE_WRITE_EA ( 0x0010 ) // file & directory
#define FILE_EXECUTE ( 0x0020 ) // file
#define FILE_TRAVERSE ( 0x0020 ) // directory
#define FILE_DELETE_CHILD ( 0x0040 ) // directory
#define FILE_READ_ATTRIBUTES ( 0x0080 ) // all
#define FILE_WRITE_ATTRIBUTES ( 0x0100 ) // all
#define FILE_ALL_ACCESS (STANDARD_RIGHTS_REQUIRED | SYNCHRONIZE | 0x1FF)
#define FILE_GENERIC_READ (STANDARD_RIGHTS_READ |\
FILE_READ_DATA |\
FILE_READ_ATTRIBUTES |\
FILE_READ_EA |\
SYNCHRONIZE)
#define FILE_GENERIC_WRITE (STANDARD_RIGHTS_WRITE |\
FILE_WRITE_DATA |\
FILE_WRITE_ATTRIBUTES |\
FILE_WRITE_EA |\
FILE_APPEND_DATA |\
SYNCHRONIZE)
#define FILE_GENERIC_EXECUTE (STANDARD_RIGHTS_EXECUTE |\
FILE_READ_ATTRIBUTES |\
FILE_EXECUTE |\
SYNCHRONIZE)
(见ntdef.h)
第三个参数是一个布局,包罗要翻开的对象范例等信息,布局界说见上面所述
第四个参数前往翻开对象的属性,是一个布局,界说如下:
typedef struct _IO_STATUS_BLOCK {
union {
NTSTATUS Status;
PVOID Pointer;
};
ULONG_PTR Information;
} IO_STATUS_BLOCK, *PIO_STATUS_BLOCK;
#if defined(_WIN64)
typedef struct _IO_STATUS_BLOCK32 {
NTSTATUS Status;
ULONG Information;
} IO_STATUS_BLOCK32, *PIO_STATUS_BLOCK32;
#endif
(见ntddk.h)
第五个参数ShareAccess是一个常数,可以是下列值:
#define FILE_SHARE_READ 0x00000001 // winnt
#define FILE_SHARE_WRITE 0x00000002 // winnt
#define FILE_SHARE_DELETE 0x00000004 // winnt
(见ntddk.h)
第六个参数OpenOptions也是一个常数,可以是下列的值:
#define FILE_DIRECTORY_FILE 0x00000001
#define FILE_WRITE_THROUGH 0x00000002
#define FILE_SEQUENTIAL_ONLY 0x00000004
#define FILE_NO_INTERMEDIATE_BUFFERING 0x00000008
#define FILE_SYNCHRONOUS_IO_ALERT 0x00000010
#define FILE_SYNCHRONOUS_IO_NONALERT 0x00000020
#define FILE_NON_DIRECTORY_FILE 0x00000040
#define FILE_CREATE_TREE_CONNECTION 0x00000080
#define FILE_COMPLETE_IF_OPLOCKED 0x00000100
#define FILE_NO_EA_KNOWLEDGE 0x00000200
#define FILE_OPEN_FOR_RECOVERY 0x00000400
#define FILE_RANDOM_ACCESS 0x00000800
#define FILE_DELETE_ON_CLOSE 0x00001000
#define FILE_OPEN_BY_FILE_ID 0x00002000
#define FILE_OPEN_FOR_BACKUP_INTENT 0x00004000
#define FILE_NO_COMPRESSION 0x00008000
#define FILE_RESERVE_OPFILTER 0x00100000
#define FILE_OPEN_REPARSE_POINT 0x00200000
#define FILE_OPEN_NO_RECALL 0x00400000
#define FILE_OPEN_FOR_FREE_SPACE_QUERY 0x00800000
#define FILE_COPY_STRUCTURED_STORAGE 0x00000041
#define FILE_STRUCTURED_STORAGE 0x00000441
#define FILE_VALID_OPTION_FLAGS 0x00ffffff
#define FILE_VALID_PIPE_OPTION_FLAGS 0x00000032
#define FILE_VALID_MAILSLOT_OPTION_FLAGS 0x00000032
#define FILE_VALID_SET_FLAGS 0x00000036
(见ntddk.h)
那么,翻开内核对象\Device\Tcp和\Device\Udp的语句如下:
WCHAR physmemNameTcp[]=L"\\Device\\TCP";
WCHAR physmemNameUdp[]=L"\\Device\\UDP";
HANDLE pTcpHandle;
HANDLE pUdpHandle;
HANDLE OpenDeviceTcpUdp(WCHAR * deviceName)
{
NTSTATUS status;
UNICODE_STRING physmemString;
OBJECT_ATTRIBUTES attributes;
IO_STATUS_BLOCK iosb;
HANDLE pDeviceHandle;
RtlInitUnicodeString(&physmemString, deviceName);
if(GetLastError()!=0)
return NULL;
InitializeObjectAttributes( &attributes,&physmemString,
OBJ_CASE_INSENSITIVE,0, NULL );
status = ZwOpenFile ( &pDeviceHandle,0x100000, &attributes, &iosb, 3,0);
if( !NT_SUCCESS( status ))
return NULL;
}
接着,程序用ZwQuerySystemInformation函数获得系统以后以是进程的所建立的句柄及其相关信息,函数的原型如下:
NTSYSAPI
NTSTATUS
NTAPI
ZwQuerySystemInformation(
IN SYSTEM_INFORMATION_CLASS SystemInformationClass,
IN OUT PVOID SystemInformation,
IN ULONG SystemInformationLength,
- 文章作者: 福州军威计算机技术有限公司
军威网络是福州最专业的电脑维修公司,专业承接福州电脑维修、上门维修、IT外包、企业电脑包年维护、局域网网络布线、网吧承包等相关维修服务。
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