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自己动手制作一个恶意流量检测系统(附源码)

FreeBuf /2019-12-02

0×0 成果展示

0×1 起因

0×2 准备的东西

0×3 驱动编写

0×4 Client编写

0×5 Python Web后端编写

0×6 结论

0×7 后记

0×0 成果展示

没有做日志记录因为时间关系。

我们假设恶意C2C服务器IP是220.181.38.148(百度的某个节点),某个木马的恶意流量特征是?? ?? ?? ??(? 匹配所有)

当我们要屏蔽220.181.38.148IP的时候 在我们后台输入这个IP地址就可以屏蔽了,当然这里只是展示了屏蔽功能,也可以做成给后台报警

这是没有增加规则的:

增加了规则:

数据包同理,这里的?? 代表匹配所有数据包。因此会把所有的数据包全部drop 掉

依然ping的通百度但是无法打开页面(因为数据包都被drop了。

当然你也可以选择记录这些IP和数据去后台进行报警通知.只要木马的流量特征库足够大,

这里说一下 很多DDOS防火墙也是这个道理,通过检测数据包的特征判断是否有DDOS攻击,一些AMP攻击的流量特征是固定的.

GitHub地址:https://github.com/huoji120/NetWatch

0×1 起因

本人是新手第一次接触驱动开发的小白,事情是这样的,一个星期前突发奇想想做一个威胁流量检测系统.于是就有了今天这篇文章。

0×2 准备的东西

做过防火墙的同学应该熟悉在windows下普遍使用WFP或者NDIS这两种驱动框架,这两种框架各有各的优点,我自己总结为:

NDIS够底层,能拦截所有的数据包和协议,而且兼容性好,覆盖系统全面.但是NDIS因为太底层,很多功能无法实现.而且很多功能实现的方法不是很友好

WFP够方便,Filte Engine很容易就能实现一个防火墙,简单快捷.而且可以很方便的得到发包进程的详细信息.但是不是很底层,依赖于tcpip.sys,如果某些东西自己写一个驱动去发包就无法抓取到.

NDIS防火墙安装会断网.这也是为什么诸如安全狗这类软件会断网的原因

不过考虑到我放弃了WIN2003系统,所以我选择了更加方便的WFP

WFP工作方式如图:

0×3 驱动编写

首先实现一个抓包demo:

R3部分建立pipe管道

enum ReportType { r_income, //进来auth r_output, //出去auth r_stream_income,  //TCP流交互 r_stream_output }; enum Protocoltype { Pro_ICMP = 1, Pro_IGMP = 2, Pro_TCP = 6, Pro_UDP = 17, Pro_RDP = 27, Pro_UNKNOWN }; struct Networkreport { ReportType type; Protocoltype Protocol; DWORD IPaddr; DWORD BuffDataLen; char* BuffData; }; std::string GetSigHex(char* data, int len) { char buf[0xFFFF] = { 0 }; for (int i = 0; i < len; i++) { char test[8] = { 0 }; if (i == len - 1) { sprintf_s(test, "%02X", (BYTE)data[i]); strcat_s(buf, test); } else { sprintf_s(test, "%02X ", (BYTE)data[i]); strcat_s(buf, test); } } return std::string(buf); } int main() { HANDLE hPipe = CreateNamedPipe( TEXT("\\\\.\\Pipe\\EzFireWall"), PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED, PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_WAIT, PIPE_UNLIMITED_INSTANCES, 0, 0, NMPWAIT_WAIT_FOREVER, NULL); if (INVALID_HANDLE_VALUE == hPipe) return false;     std::cout << "创建管道完毕,监听程序...\n"; const int size = 1024 * 10; char buf[size]; DWORD rlen = 0; while (true) { if (ConnectNamedPipe(hPipe, NULL) != NULL) { if (ReadFile(hPipe, buf, size, &rlen, NULL) == FALSE) continue; else { //接收信息 Networkreport* buffer_tmp = (Networkreport*)&buf; SIZE_T buffer_len = sizeof(Networkreport) + buffer_tmp->BuffDataLen; Networkreport* buffer = (Networkreport*)malloc(buffer_len); memcpy(buffer, buffer_tmp, buffer_len); char* data = (char*)malloc(buffer->BuffDataLen); BYTE* tmp = (BYTE*)buffer + sizeof(Networkreport); memcpy(data, tmp, buffer->BuffDataLen); DWORD RemoteIP = buffer->IPaddr; printf("远程IP:%u.%u.%u.%u 协议类型: %d 数据类型: %d 长度: %d \n", (RemoteIP >> 24) & 0xFF, (RemoteIP >> 16) & 0xFF, (RemoteIP >> 8) & 0xFF, RemoteIP & 0xFF, buffer->Protocol, buffer->type, buffer->BuffDataLen); if (buffer->type == r_stream_income || buffer->type == r_stream_output) { printf("数据: %s \n", GetSigHex(data,buffer->BuffDataLen).c_str()); } free(data); free(buffer); } } } std::cout << "出现错误 \n"; system("pause"); return 0; }

在驱动entry部分连接pipe管道:

HANDLE	g_hClient; IO_STATUS_BLOCK g_ioStatusBlock; KEVENT	g_event; VOID ReportToR3(Networkreport* m_parameter,int lent) { if (!NT_SUCCESS(ZwWriteFile(g_hClient, NULL, NULL, NULL, &g_ioStatusBlock, (void*)m_parameter, lent, NULL, NULL))) DPRINT("[DebugMessage] Error Cannot Wirte Pipe! \n"), g_hClient = 0; }

        RtlInitUnicodeString(&uniName, L"\\DosDevices\\Pipe\\EzFireWall"); InitializeObjectAttributes(&objAttr, &uniName,OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,NULL, NULL); Status = ZwCreateFile(&g_hClient, GENERIC_READ | GENERIC_WRITE, &objAttr, &g_ioStatusBlock, NULL, FILE_ATTRIBUTE_NORMAL, 0, FILE_OPEN, FILE_SYNCHRONOUS_IO_NONALERT, NULL, 0); if (!NT_SUCCESS(Status) || !g_hClient) { DPRINT("[DebugMessage] Cannot pipe Fail! 0x%08X \n", Status); return Status; } DPRINT("[DebugMessage] Connect pipe Success!\n"); KeInitializeEvent(&g_event, SynchronizationEvent, TRUE);

然后WFP模板部分不单独发了,没什么好说的,重点说一下我们要挂钩的几个地方:

FWPM_LAYER_ALE_AUTH_CONNECT_V4、FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V4 分别对应链接认证阶段阶段,区别是一个是out一个是income

FWPM_LAYER_STREAM_V4 抓取数据流,用于流量信息监测

	if (IsEqualGUID(layerKey, &FWPM_LAYER_ALE_AUTH_CONNECT_V4)) { DPRINT("[DebugMessage] 挂载 FWPM_LAYER_ALE_AUTH_CONNECT_V4! \n"); sCallout.classifyFn = SFALEConnectClassify; //我们的回调 sCallout.notifyFn = SFALEConnectNotify; } else if (IsEqualGUID(layerKey, &FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V4)) { DPRINT("[DebugMessage] 挂载 FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V4! \n"); sCallout.classifyFn = SFALERecvAcceptClassify; //我们的回调 sCallout.notifyFn = SFALERecvAcceptNotify; } else if (IsEqualGUID(layerKey, &FWPM_LAYER_STREAM_V4)) { DPRINT("[DebugMessage] 挂载 FWPM_LAYER_STREAM_V4! \n"); sCallout.classifyFn = SFALERecvDataClassify; //我们的回调 sCallout.notifyFn = SFALERecvDataNotify; } Status = FwpsCalloutRegister0(DeviceObject, &sCallout, calloutId);

其中 值得一提的是FWPM_LAYER_ALE_CONNECT_REDIRECT_V4,可以改变连接的地址,实现偷梁换柱功能.非常适合拿去干坏事.不过不在本次的讨论范围内

在SFALEConnectClassify和SFALERecvAcceptClassify回调中,负责屏蔽黑名单IP,这部分稍微抄了一下前辈的代码:

//本地连别人的IP的连接 void SFALEConnectClassify( __in const FWPS_INCOMING_VALUES0* inFixedValues, __in const FWPS_INCOMING_METADATA_VALUES0* inMetaValues, __inout void* layerData, __in const FWPS_FILTER0* filter, __in UINT64 flowContext, __in FWPS_CLASSIFY_OUT0* classifyOut ) { if (classifyOut->rights & FWPS_RIGHT_ACTION_WRITE) { FWP_ACTION_TYPE Action = (CanIFilterThisRequest(inFixedValues,inMetaValues, layerData,flowContext) ? FWP_ACTION_BLOCK : FWP_ACTION_PERMIT); PerformBasicAction(inFixedValues, inMetaValues, layerData, filter, flowContext, classifyOut, Action); } } //接收远程IP的连接 void SFALERecvAcceptClassify( __in const FWPS_INCOMING_VALUES0* inFixedValues, __in const FWPS_INCOMING_METADATA_VALUES0* inMetaValues, __inout void* layerData, __in const FWPS_FILTER0* filter, __in UINT64 flowContext, __inout FWPS_CLASSIFY_OUT0* classifyOut ) { if (classifyOut->rights & FWPS_RIGHT_ACTION_WRITE) { FWP_ACTION_TYPE Action = (CanIFilterThisRequest(inFixedValues,inMetaValues, layerData, flowContext) ? FWP_ACTION_BLOCK : FWP_ACTION_PERMIT); PerformBasicAction(inFixedValues, inMetaValues, layerData, filter, flowContext, classifyOut, Action); } } 

FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V4 这里是我之前代码,有个小bug,至于是什么bug大佬应该一眼看出来了:

void SFALERecvDataClassify( __in const FWPS_INCOMING_VALUES0* inFixedValues, __in const FWPS_INCOMING_METADATA_VALUES0* inMetaValues, __inout void* layerData,//这玩意是数据指针 __in const FWPS_FILTER0* filter, __in UINT64 flowContext, __inout FWPS_CLASSIFY_OUT0* classifyOut ) { if (KeGetCurrentIrql() > DISPATCH_LEVEL) { DPRINT("[DebugMessage] Erro in PassIve: %d \n", KeGetCurrentIrql()); return FALSE; } FWPS_STREAM_CALLOUT_IO_PACKET* streamPacket = (FWPS_STREAM_CALLOUT_IO_PACKET*)layerData; DWORD RemoteIP = inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_REMOTE_ADDRESS].value.uint32; DWORD LocalIP = inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_LOCAL_ADDRESS].value.uint32; if (streamPacket && streamPacket->streamData != NULL && streamPacket->streamData->dataLength != 0  && RemoteIP != LocalIP && g_StartFilter) { SIZE_T streamLength = streamPacket->streamData->dataLength; BOOLEAN inbound = (BOOLEAN)((streamPacket->streamData->flags & FWPS_STREAM_FLAG_RECEIVE) == FWPS_STREAM_FLAG_RECEIVE); BYTE* stream = ExAllocatePoolWithTag(NonPagedPool, streamLength, TAG_NAME_NOTIFY); SIZE_T byte_copied = 0; if (stream) { RtlZeroMemory(stream, streamLength); FwpsCopyStreamDataToBuffer( streamPacket->streamData, stream, streamLength, &byte_copied); NT_ASSERT(bytesCopied == streamLength); DPRINT("[DebugMessage] inbound: %d streamBuffer: %s ", inbound, stream); SIZE_T buffsize = streamLength + sizeof(Networkreport); inbound = (BOOLEAN)((streamPacket->streamData->flags & FWPS_STREAM_FLAG_RECEIVE) == FWPS_STREAM_FLAG_RECEIVE); Networkreport* report = (Networkreport*)ExAllocatePoolWithTag(NonPagedPool, buffsize, TAG_NAME_REPORT); if (report) { RtlZeroMemory(report, buffsize); report->type = inbound ? r_stream_income : r_stream_output; report->Protocol = inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_PROTOCOL].value.uint16; report->IPaddr = RemoteIP; report->BuffDataLen = streamLength; //定位到buffer的sizeof(Networkreport)位置 BYTE* tmp = (BYTE*)report + sizeof(Networkreport); memcpy(tmp, stream, streamLength); ReportToR3(report, buffsize); ExFreePool(report); } ExFreePool(stream); } } classifyOut->actionType = FWP_ACTION_CONTINUE; } 

结果:

好的可以抓包了就可以开始进行下一步过滤了:

首先是提交过滤的程序,这里偷懒了:

//添加数据到 到黑名单数据列表 VOID AddBlackListData(char* data,DWORD blockip,SIZE_T len) { if (blockip == 0x0) { DPRINT("[DebugMessage] BlackData :%s len: %d \n", data, len); PBLACK_LIST_DATA newLink = (PBLACK_LIST_DATA)ExAllocatePoolWithTag(PagedPool, sizeof(BLACK_LIST_DATA), TAG_NAME_BLACKLISTDATA); if (newLink == NULL) ASSERT(false); //RtlZeroMemory(newLink, sizeof(BLACK_LIST_DATA)); memcpy(newLink->data, data, len); DPRINT("[DebugMessage] BlackData :%s \n", newLink->data); InsertTailList(&gBackListDataTable.link, (PLIST_ENTRY)newLink); } else { for (int i = 0; i < MAX_DATA_SIZE; i++) { if (gBackListIPTable[i] == 0) { gBackListIPTable[i] = blockip; DPRINT("[DebugMessage] BlackIP :0x%08X \n", gBackListIPTable[i]); break; } } } }

控制码:

NTSTATUS DriverControlHandler( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp) { PIO_STACK_LOCATION  irpSp;// Pointer to current stack location NTSTATUS            ntStatus = STATUS_UNSUCCESSFUL;// Assume success ULONG               inBufLength; // Input buffer length ULONG               outBufLength; // Output buffer length PUCHAR inBuf, outBuf; UNREFERENCED_PARAMETER(DeviceObject); irpSp = IoGetCurrentIrpStackLocation(Irp); inBufLength = irpSp->Parameters.DeviceIoControl.InputBufferLength; outBufLength = irpSp->Parameters.DeviceIoControl.OutputBufferLength; inBuf = (PUCHAR)Irp->AssociatedIrp.SystemBuffer; outBuf = (PUCHAR)Irp->AssociatedIrp.SystemBuffer; DPRINT("[DebugMessage] DriverControlHandler: inBufLength: %d outBufLength: %d \n", inBufLength, outBufLength); if (!inBufLength || !outBufLength) { ntStatus = STATUS_INVALID_PARAMETER; goto End; } switch (irpSp->Parameters.DeviceIoControl.IoControlCode) { case IOCTL_ADD_BLACKLIST_DATA: { DPRINT("[DebugMessage] Add BlackList Data! \n"); PPUSH_DATA push_data = (PPUSH_DATA)ExAllocatePoolWithTag(PagedPool, sizeof(PUSH_DATA), "tM2d"); if (push_data) { RtlZeroMemory(push_data, sizeof(PUSH_DATA)); memcpy(push_data, inBuf, inBufLength); AddBlackListData(push_data->data, push_data->BlockIP, push_data->dataLen); DPRINT("[DebugMessage] BlockIP: 0x%08X data: %s len: %d \n",  push_data->BlockIP, push_data->data, push_data->dataLen); g_StartFilter = TRUE; ntStatus = STATUS_SUCCESS; ExFreePoolWithTag(push_data, "tM2d"); } else { ntStatus = STATUS_INVALID_PARAMETER; } break; } default: break; } End: Irp->IoStatus.Status = ntStatus; Irp->IoStatus.Information = 0; IoCompleteRequest(Irp, IO_NO_INCREMENT); return ntStatus; }

黑名单IP匹配:

//黑名单IP匹配 BOOLEAN QueryBlackIP(DWORD ipaddr) { KIRQL   Irql = ExAcquireSpinLockExclusive(&gBlockIpLock); BOOLEAN result = FALSE; for (int i = 0; i < MAX_DATA_SIZE; i++) { if (gBackListIPTable[i] == ipaddr) { result = TRUE; break; } } ExReleaseSpinLockExclusive(&gBlockIpLock, Irql); return result; }

之后在SFALEConnectClassify和SFALERecvAcceptClassify的地方进行验证:

BOOLEAN CanIFilterThisRequest( __in const FWPS_INCOMING_VALUES0* inFixedValues, __in const FWPS_INCOMING_METADATA_VALUES0* inMetaValues, __in void* packet, _In_ UINT64 flowContext ) { UNREFERENCED_PARAMETER(inMetaValues); if (KeGetCurrentIrql() > DISPATCH_LEVEL) { DPRINT("[DebugMessage] Erro in PassIve: %d \n", KeGetCurrentIrql()); return FALSE; } if (g_StartFilter) { DWORD LocalIp = inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_LOCAL_ADDRESS].value.uint32; DWORD RemoteIP = inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_REMOTE_ADDRESS].value.uint32; if (LocalIp != RemoteIP) { if (QueryBlackIP(RemoteIP)) { DPRINT("[DebugMessage] Found BlackList IP! \n"); return TRUE; } } } //这边可以阻止黑名单IP进入. /* char* ProtocolName = ProtocolIdToName(inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_PROTOCOL].value.uint16); DWORD LocalIp = inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_LOCAL_ADDRESS].value.uint32; DWORD RemoteIP = inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_REMOTE_ADDRESS].value.uint32; DPRINT("[DebugMessage] Out: ProtocolName: %s Local: %u.%u.%u.%u:%d Remote:%u.%u.%u.%u:%d Protocol: %s \n", (LocalIp >> 24) & 0xFF, (LocalIp >> 16) & 0xFF, (LocalIp >> 8) & 0xFF, LocalIp & 0xFF, inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_LOCAL_PORT].value.uint16, (RemoteIP >> 24) & 0xFF, (RemoteIP >> 16) & 0xFF, (RemoteIP >> 8) & 0xFF, RemoteIP & 0xFF, inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_REMOTE_PORT].value.uint16, ProtocolName); ExFreePool(ProtocolName); */ return FALSE; }

CanIFilterThisRequest 返回TRUE后 在SFALEConnectClassify和SFALERecvAcceptClassify中阻止链接:

FWP_ACTION_TYPE Action = (CanIFilterThisRequest(inFixedValues,inMetaValues, layerData,flowContext) ? FWP_ACTION_BLOCK : FWP_ACTION_PERMIT); PerformBasicAction(inFixedValues,inMetaValues,layerData,filter,flowContext,classifyOut,Action);

然后是数据包过滤:

//黑名单数据匹配 BOOLEAN QueryBlackListData(char* data, SIZE_T len) { KIRQL   Irql = ExAcquireSpinLockExclusive(&gBlockDataLock); BOOLEAN result = FALSE; PLIST_ENTRY	head = &gBackListDataTable.link; PBLACK_LIST_DATA next = (PBLACK_LIST_DATA)gBackListDataTable.link.Blink; while (head != (PLIST_ENTRY)next) { if(FindPattern(next->data, data, len)) { result = TRUE; break; } } ExReleaseSpinLockExclusive(&gBlockDataLock, Irql); return result; }
void SFALERecvDataClassify( __in const FWPS_INCOMING_VALUES0* inFixedValues, __in const FWPS_INCOMING_METADATA_VALUES0* inMetaValues, __inout void* layerData,//这玩意是数据指针 __in const FWPS_FILTER0* filter, __in UINT64 flowContext, __inout FWPS_CLASSIFY_OUT0* classifyOut ) { if (KeGetCurrentIrql() > DISPATCH_LEVEL) { DPRINT("[DebugMessage] Erro in PassIve: %d \n", KeGetCurrentIrql()); return FALSE; } FWPS_STREAM_CALLOUT_IO_PACKET* streamPacket = (FWPS_STREAM_CALLOUT_IO_PACKET*)layerData; DWORD RemoteIP = inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_REMOTE_ADDRESS].value.uint32; DWORD LocalIP = inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_LOCAL_ADDRESS].value.uint32; if (streamPacket && streamPacket->streamData != NULL && streamPacket->streamData->dataLength != 0  && RemoteIP != LocalIP && g_StartFilter) { SIZE_T streamLength = streamPacket->streamData->dataLength; BOOLEAN inbound = (BOOLEAN)((streamPacket->streamData->flags & FWPS_STREAM_FLAG_RECEIVE) == FWPS_STREAM_FLAG_RECEIVE); BYTE* stream = ExAllocatePoolWithTag(NonPagedPool, streamLength, TAG_NAME_NOTIFY); SIZE_T byte_copied = 0; if (stream) { RtlZeroMemory(stream, streamLength); FwpsCopyStreamDataToBuffer( streamPacket->streamData, stream, streamLength, &byte_copied); NT_ASSERT(bytesCopied == streamLength); if (QueryBlackListData(stream, streamLength)) { DPRINT("[DebugMessage] Found BlackList Data! \n"); classifyOut->actionType = FWP_ACTION_BLOCK; ExFreePool(stream); return; } /* //抓包与截包,如果你发现这里蓝屏请自己加锁,但是会极大的影响系统运行效率(网络吞吐量太大,pipe管道有20MS的延迟,而且还是单线程.伤不起 DPRINT("[DebugMessage] inbound: %d streamBuffer: %s ", inbound, stream); SIZE_T buffsize = streamLength + sizeof(Networkreport); inbound = (BOOLEAN)((streamPacket->streamData->flags & FWPS_STREAM_FLAG_RECEIVE) == FWPS_STREAM_FLAG_RECEIVE); Networkreport* report = (Networkreport*)ExAllocatePoolWithTag(NonPagedPool, buffsize, TAG_NAME_REPORT); if (report) { RtlZeroMemory(report, buffsize); report->type = inbound ? r_stream_income : r_stream_output; report->Protocol = inFixedValues->incomingValue[FWPS_FIELD_ALE_AUTH_CONNECT_V4_IP_PROTOCOL].value.uint16; report->IPaddr = RemoteIP; report->BuffDataLen = streamLength; //定位到buffer的sizeof(Networkreport)位置 BYTE* tmp = (BYTE*)report + sizeof(Networkreport); memcpy(tmp, stream, streamLength); ReportToR3(report, buffsize); ExFreePool(report); }*/ ExFreePool(stream); } } classifyOut->actionType = FWP_ACTION_CONTINUE; } 

匹配成功后 classifyOut->actionType = FWP_ACTION_BLOCK; 则丢掉这个数据包

匹配函数FindPattern

BOOL FindPattern(char* pattern,void* data,SIZE_T data_len) { const char* pat = pattern; DWORD firstMatch = 0; DWORD End = (DWORD)data + data_len; for (DWORD pCur = (DWORD)data; pCur < End; pCur++) { if (!*pat) return firstMatch; if (*(PBYTE)pat == '\?' || *(BYTE*)pCur == getByte(pat)) { if (!firstMatch) firstMatch = pCur; if (!pat[2]) return firstMatch; if (*(PWORD)pat == '\?\?' || *(PBYTE)pat != '\?') pat += 3; else pat += 2;    //one ? } else { pat = pattern; firstMatch = 0; } } return firstMatch != NULL; }

至此.驱动部分编写完毕.

0×4 Client编写

这里有个失误,不应该使用Client作为TCP服务端,应该是Python来做服务端,无所谓了.先能用再说:

#define IOCTL_ADD_BLACKLIST_DATA \     CTL_CODE(FILE_DEVICE_UNKNOWN, 0x1337, METHOD_IN_DIRECT, FILE_ANY_ACCESS) typedef NTSTATUS(WINAPI* NtOpenFileEx)( _Out_ PHANDLE            FileHandle, _In_  ACCESS_MASK        DesiredAccess, _In_  POBJECT_ATTRIBUTES ObjectAttributes, _Out_ PIO_STATUS_BLOCK   IoStatusBlock, _In_  ULONG              ShareAccess, _In_  ULONG              OpenOptions ); struct Networkstruct { int data_len; DWORD IP; char data[255]; }; typedef struct _PUSH_DATA { DWORD BlockIP; SIZE_T dataLen; char data[255]; }PUSH_DATA, * PPUSH_DATA; NtOpenFileEx fpNtOpenFile = (NtOpenFileEx)GetProcAddress(GetModuleHandleA("ntdll"), "NtOpenFile"); HANDLE deviceHandle_; bool is_loaded() { if (!deviceHandle_ || deviceHandle_ == INVALID_HANDLE_VALUE) { //deviceHandle_ = CreateFile(L"C:\\windows\\TEMP\\cpuz147\\cpuz145_x64.sys", FILE_ALL_ACCESS, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr); IO_STATUS_BLOCK io_status; NTSTATUS status; UNICODE_STRING    device_name = UNICODE_STRING{ sizeof(DEVICE_NAME) - sizeof(WCHAR), sizeof(DEVICE_NAME), (PWSTR)DEVICE_NAME }; OBJECT_ATTRIBUTES obj_attr = OBJECT_ATTRIBUTES{ sizeof(OBJECT_ATTRIBUTES), nullptr, &device_name, 0, nullptr, nullptr }; status = fpNtOpenFile( &deviceHandle_, GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, &obj_attr, &io_status, 0, OPEN_EXISTING); if (!NT_SUCCESS(status)) { ULONG i = 10; do { status = fpNtOpenFile( &deviceHandle_, GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, &obj_attr, &io_status, 0, OPEN_EXISTING); Sleep(250); } while (!NT_SUCCESS(status) && i--); } } return deviceHandle_ && deviceHandle_ != INVALID_HANDLE_VALUE; } int main() { if (!is_loaded()) { printf("加载驱动失败! %d \n", GetLastError()); system("pause"); return 0; } WSADATA wsaData; SOCKET ClientSocket; int port = 5099; if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) { return false; } SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); SOCKADDR_IN addrSrv; addrSrv.sin_family = AF_INET; addrSrv.sin_port = htons(port); //1024以上的端口号   addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY); int retVal = bind(sockSrv, (LPSOCKADDR)&addrSrv, sizeof(SOCKADDR_IN)); if (retVal == SOCKET_ERROR) { return false; } if (listen(sockSrv, 10) == SOCKET_ERROR) { return false; } SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); static bool first = false; ClientSocket = accept(sockSrv, (SOCKADDR*)&addrClient, &len); if (ClientSocket == SOCKET_ERROR) { return false; } while (true) { char recvBuf[255]; memset(recvBuf, 0, sizeof(recvBuf)); if (recv(ClientSocket, recvBuf, sizeof(recvBuf), 0) == 0 || ClientSocket == INVALID_SOCKET) { first = false; closesocket(ClientSocket); ClientSocket = accept(sockSrv, (SOCKADDR*)&addrClient, &len); continue; } Networkstruct* buffer = (Networkstruct*)recvBuf; //1说明是ip 2说明是data char	output; DWORD	returnLen, read; PUSH_DATA data = { 0 }; data.BlockIP = buffer->IP; data.dataLen = buffer->data_len; printf("buffer->data %s \n", buffer->data); memcpy(data.data, buffer->data,buffer->data_len); printf("buffer len: %d data: %s IP: 0x%08X\n", data.dataLen, data.data, data.BlockIP); if (!DeviceIoControl(deviceHandle_, IOCTL_ADD_BLACKLIST_DATA, (LPVOID)&data, sizeof(PUSH_DATA), &output, sizeof(char), &returnLen, NULL)) { printf("DeviceIoControl错误: %d\n", GetLastError()); } else { printf("提交规则成功 \n"); } closesocket(ClientSocket); ClientSocket = accept(sockSrv, (SOCKADDR*)&addrClient, &len); } closesocket(sockSrv); WSACleanup(); system("pause"); return 0; }

0×5 Python web后台编写

非常简单的代码,基于Flask和Jquery与semanticUI

from flask import Flask, request from flask import render_template from binascii import hexlify from socket import inet_aton, socket, AF_INET, SOCK_STREAM import ctypes import json import struct import sys app = Flask(__name__) ip_blacklist = [{'data': '192.168.1.1', 'text': '测试路由器地址(此规则不会生效)'}] data_blacklist = [{'data': '?? ?? ?? ??', 'text': '拦截全部流量(此规则不会生效)'}] HOST = 'localhost' PORT = 5099 BUFSIZ = 255 ADDR = (HOST, PORT) def push_backlist_data(data, data_len, block_ip, push_type):     if push_type == 1:         data = "huoji"         data_len = len(data)     c = socket(AF_INET, SOCK_STREAM)     c.connect(ADDR)     packet = struct.pack("IL255s",                          data_len,                          int(block_ip),                          data.encode('gbk'),                          )     c.send(packet)     c.close() def Ip2Int(ipaddr):     int_ip = struct.unpack('!I', inet_aton(ipaddr))[0]     print('IP:' + str(int_ip))     return int_ip @app.route('/') def index():     context = ip_blacklist     context_type = {         'table_type1': "IP地址",         'table_type2': "备注"     }     return render_template('index.html', main=context, type=context_type) @app.route('/api', methods=["POST", "GET"]) def api():     if request.method == 'POST':         data = request.form.get("data")         page = request.form.get("page")         push = request.form.get("push")         push_data = request.form.get("push_data")         if data:             # push_backlist_data(data, len(data))             return json.dumps({"status": "success"})         if page:             json_return = {"status": "Error"}             if int(page) == 1:                 json_return = {                     "status": "success",                     "page": "ip_list",                     "table_1": "IP地址",                     "table_2": "备注",                     "data": ip_blacklist                 }             if int(page) == 2:                 json_return = {                     "status": "success",                     "page": "data_list",                     "table_1": "特征码",                     "table_2": "备注",                     "data": data_blacklist                 }             return json.dumps(json_return)         if push and push_data:             json_return = {"status": "Error"}             processdata = push_data.split("@")             if int(push) == 1:                 ip_blacklist.append({                     "data": processdata[0],                     "text": processdata[1]                 })             else:                 data_blacklist.append({                     "data": processdata[0],                     "text": processdata[1]                 })             blockip = 0             if int(push) == 1:                 blockip = Ip2Int(processdata[0])             print("type " + push + " blockip: " + str(blockip))             push_backlist_data(                 processdata[0],                 len(processdata[0]),                 blockip,                 int(push)             )             return json.dumps(json_return)     return "API" if __name__ == '__main__':     app.run(debug=True) 

0×6 结论

在前人无数的踩坑文章下诞生的没有的东西

0×7 后记

当今的安全企业很多都是在蹭政策(AkA 等保测评)去卖自家的产品赚钱,但自家的产品多半是从其他地方购买的东西或者是直接从github下载改造的东西.而且安全这个行业处于一个尴尬的地位,高压政策让进来的门槛变高,人员缺少,很多人觉得搞安全 = 搞黑客,去报培训班”培训” ,加上安全中的渗透这一块入门门槛和其他编程语言相比和java差不多,而渗透的水平只在于是否花更多时间积累更多经验.这些因素导致整个安全行业水分很大.有搞安全的公司领导根本不懂安全的、有安全公司直接拿开源产品改编然后去卖给甲方的.有整个公司就一个会搞安全的其他都是蹭饭的.这个时代的人们很浮躁,已经没有多少人可以像以前的人们一样能静下心来研究技术了.而是乐于给自己打上标签然后止步于这些自己立下的标签之下.

*本文原创作者:huoji120,本文属于FreeBuf原创奖励计划,未经许可禁止转载