Esse script procura por subdomínios em sites e retorna os IPs desses subdomínios.

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Esconder código-fonte

#include <stdio.h>
#include <errno.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <stdlib.h>
#define RED "{FONTE}33[0;31m"
#define GREEN "{FONTE}33[0;32m"
#define CYAN "{FONTE}33[1;36m"
#define RESET "{FONTE}33[0m"

/*

%# date
Wed Mar  5 00:38:56 BRT 2014
%# hostname
hc0der.blogspot.com
%# cat readme

*/

char *chomp(char *sub){
    int len = strlen(sub)-1;
    if(sub[len] == '\n')
        sub[len] = '{FONTE}';
    return sub;
}

void check_host(char *host){
    struct hostent *hostname;
    struct in_addr **address_list;
    int i;

    hostname = gethostbyname(host);
    if(hostname == NULL){
        fprintf(stdout,"%s[-]%s Unknown host\n",RED,RESET);
        return;
    }

    address_list = (struct in_addr **) hostname->h_addr_list;

    fprintf(stdout,"%s[+]%s %s { ",GREEN,RESET,host);
    for(i=0;address_list[i] != NULL; i++)
        fprintf(stdout,"'%s' ",inet_ntoa(*address_list[i]));
    fprintf(stdout,"}\n");
}

void help(){
    fprintf(stderr,"\n[%s+%s] Subdomain Finder by MMxM\n",GREEN,RESET);
    fprintf(stderr,"[%s*%s] Usage: ./sub <target> <subdomain_wordlist>\n\n",CYAN,RESET);
    exit(1);
}

int main(int argc, char *argv[]){
    if(argc != 3)
        help();

    const char *target = argv[1];
    const char *arquivo = argv[2];

    char line[100];
    char *result;
    FILE *arq;

    if( (arq = fopen(arquivo, "rt")) == NULL ){
        fprintf(stdout,"%s[-]%s fopen(\"%s\",\"rt\"): %s \n",RED,RESET,arquivo,strerror(errno));
        return 1;
    }

    while(!feof(arq)){
        result = fgets(line,100,arq);
        if(result){
            chomp(result);
            int size = strlen(result)+strlen(target)+2;
            char *subdominio = (char *) malloc(size);
            sprintf(subdominio,"%s.%s",result,target);
            fprintf(stdout,"%s[*]%s Checking => %s\n",CYAN,RESET,subdominio);
            check_host(subdominio);
            free(subdominio);
        }
    }

    return 0;
}

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