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| | |-+  Sobre reglas snort
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Autor Tema: Sobre reglas snort  (Leído 9,305 veces)
Agustín Cuba

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Sobre reglas snort
« en: 17 Agosto 2022, 13:27 pm »

Hola, comunidad.
El snort.config me está dando este error:

ERROR: c:\snort\etc\snort.conf(328) => Invalid keyword '}' for server configuration.
#Fatal Error, Quitting..
#Could not create the registry key.

Pero no encuentro dónde está la { o la que sobra. No sé cómo insertar el texto del snort.config aquí para mostrárselo y que me digan si hay otro error.
Intento usar Snort desde windows 10.
¿Alguien tiene unas reglas que le funcionen bien y que me sirvan?

Gracias
En línea

el-brujo
ehn
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Re: Sobre reglas snort
« Respuesta #1 en: 17 Agosto 2022, 16:33 pm »

¿Y ya has mirado bien la línea de 328 del fichero c:\snort\etc\snort.conf?

Para insertar texto, simplemente, copia y pega el contenido del fichero snort.conf en el foro.

Yo sólo he usado Suricata, pero en GNU/Linux y con las reglas básicas:



Código:
sudo suricata-update enable-source oisf/trafficid
sudo suricata-update enable-source sslbl/ssl-fp-blacklist
sudo suricata-update enable-source ptresearch/attackdetection


Manual, tutorial de Suricata

Suricata - IDS/IPS - Instalación, configuración básica reglas
https://blog.elhacker.net/2021/03/suricata-ids-ips-instalacion-configuracion-reglas-.html

Instalar y configurar IDS/IPS Suricata
https://blog.elhacker.net/2021/02/instalar-configurar-reglas-ids-ips-suricata-en-una-raspberry-pi.html
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Agustín Cuba

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Re: Sobre reglas snort
« Respuesta #2 en: 17 Agosto 2022, 16:44 pm »

Es que no encuentro cuál es la línea 328. La he buscado, pero no he encontrado el problema ni he estado seguro de que es la línea correcta. No he usado suricata y todavía no he instalado kali
En línea

el-brujo
ehn
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Re: Sobre reglas snort
« Respuesta #3 en: 17 Agosto 2022, 16:48 pm »

Abre el fichero snort.conf con un editor como NotePad++ que te muestra por defecto las líneas o bien incluso con el WordPad o el Bloc de Notas puedes decirle Ir a la línea 328 y te llevará, no hace falta que las vayas contando.

No es necesario instalar Kali para usar Snort, ni Suricata.
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Agustín Cuba

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Re: Sobre reglas snort
« Respuesta #4 en: 17 Agosto 2022, 17:07 pm »

Lo he hecho en word, pero esa línea queda dentro de una instrucción que nada tiene que ver. Estoy revisando a mano dónde está cada }, para ver si encuentro el que falta o sobra, pero ya eso lo había hecho en dos ocasiones anteriores. Voy a hacerlo con el notepad++, porque con el word, cada vez que hay una nueva línea, pone un número de línea, aunque haya una línea en blanco
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Agustín Cuba

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Re: Sobre reglas snort
« Respuesta #5 en: 17 Agosto 2022, 17:11 pm »

No, en esa línea, con el notepad, no tiene ningún signo de ese tipo
En línea

el-brujo
ehn
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Re: Sobre reglas snort
« Respuesta #6 en: 17 Agosto 2022, 17:30 pm »

Citar
Estoy revisando a mano dónde está cada }


 :huh: :huh: :huh:


Copia el contenido completo del fichero snort.conf

Ctrl + E para seleccionar todo, Ctrl + C para copiar, Ctrl + v para pegar en el mensaje del foro
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Agustín Cuba

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Re: Sobre reglas snort
« Respuesta #7 en: 18 Agosto 2022, 20:58 pm »

Código:
#--------------------------------------------------
# VRT Rule Packages Snort.conf
#
#   For more information visit us at:
#     http://www.snort.org                   Snort Website
#     http://vrt-blog.snort.org/    Sourcefire VRT Blog
#
#     Mailing list Contact:      snort-sigs@lists.sourceforge.net
#     False Positive reports:    fp@sourcefire.com
#     Snort bugs:                bugs@snort.org
#
#     Compatible with Snort Versions:
#     VERSIONS : 2.9.8.3
#
#     Snort build options:
#     OPTIONS : --enable-gre --enable-mpls --enable-targetbased --enable-ppm --enable-perfprofiling --enable-zlib --enable-active-response --enable-normalizer --enable-reload --enable-react --enable-flexresp3
#
#     Additional information:
#     This configuration file enables active response, to run snort in
#     test mode -T you are required to supply an interface -i <interface>
#     or test mode will fail to fully validate the configuration and
#     exit with a FATAL error
#--------------------------------------------------

###################################################
# This file contains a sample snort configuration.
# You should take the following steps to create your own custom configuration:
#
#  1) Set the network variables.
#  2) Configure the decoder
#  3) Configure the base detection engine
#  4) Configure dynamic loaded libraries
#  5) Configure preprocessors
#  6) Configure output plugins
#  7) Customize your rule set
#  8) Customize preprocessor and decoder rule set
#  9) Customize shared object rule set
###################################################

###################################################
# Step #1: Set the network variables.  For more information, see README.variables
###################################################

# Setup the network addresses you are protecting
var HOME_NET 192.168.8.0/24

# Set up the external network addresses. Leave as "any" in most situations
var EXTERNAL_NET !$HOME_NET

# List of DNS servers on your network
var DNS_SERVERS $HOME_NET

# List of SMTP servers on your network
var SMTP_SERVERS $HOME_NET

# List of web servers on your network
var HTTP_SERVERS $HOME_NET

# List of sql servers on your network
var SQL_SERVERS $HOME_NET

# List of telnet servers on your network
var TELNET_SERVERS $HOME_NET

# List of ssh servers on your network
var SSH_SERVERS $HOME_NET

# List of ftp servers on your network
var FTP_SERVERS $HOME_NET

# List of sip servers on your network
var SIP_SERVERS $HOME_NET

# List of ports you run web servers on
portvar HTTP_PORTS [36,80,81,82,83,84,85,86,87,88,89,90,311,323,383,443,444,555,591,593,623,631,664,801,808,818,901,972,1158,1220,1270,1414,1533,1581,1719,1720,1741,1801,1812,1830,1942,2231,2301,2375,2381,2578,2809,2869,2980,3000,3029,3037,3057,3128,3323,3443,3702,4000,4343,4444,4848,5000,5054,5060,5061,5117,5222,5250,5416,5443,5450,5480,5555,5600,5814,5894,5984,5985,5986,6060,6080,6173,6988,7000,7001,7005,7070,7071,7080,7144,7145,7180,7181,7510,7770,7777,7778,7779,8000,8001,8008,8014,8015,8020,8028,8040,8080,8081,8082,8085,8088,8090,8095,8118,8123,8161,8180,8181,8182,8222,8243,8280,8300,8333,8344,8393,8400,8443,8484,8500,8509,8511,8694,8787,8800,8848,8852,8880,8888,8899,8983,9000,9001,9002,9050,9060,9080,9090,9091,9111,9200,9201,9290,9443,9447,9502,9700,9710,9788,9830,9850,9990,9999,10000,10080,10100,10250,10255,10297,10443,11371,12601,13014,15489,16000,16992,16993,16994,16995,17000,18081,19980,20000,29991,30007,30018,30888,33300,34412,34443,34444,36099,37215,40007,41080,44449,49152,49153,50000,50002,50452,51423,53331,54444,55252,55555,56712]

# List of ports you want to look for SHELLCODE on.
portvar SHELLCODE_PORTS !80

# List of ports you might see oracle attacks on
portvar ORACLE_PORTS 1024:

# List of ports you want to look for SSH connections on:
portvar SSH_PORTS 22

# List of ports you run ftp servers on
portvar FTP_PORTS [21,2100,3535]

# List of ports you run SIP servers on
portvar SIP_PORTS [5060,5061,5600]

# List of file data ports for file inspection
portvar FILE_DATA_PORTS [$HTTP_PORTS,110,143]

# List of GTP ports for GTP preprocessor
portvar GTP_PORTS [2123,2152,3386]

# other variables, these should not be modified
var AIM_SERVERS [64.12.24.0/23,64.12.28.0/23,64.12.161.0/24,64.12.163.0/24,64.12.200.0/24,205.188.3.0/24,205.188.5.0/24,205.188.7.0/24,205.188.9.0/24,205.188.153.0/24,205.188.179.0/24,205.188.248.0/24]

# Path to your rules files (this can be a relative path)
# Note for Windows users:  You are advised to make this an absolute path,
# such as:  c:\snort\rules
var RULE_PATH c:\snort\rules
var SO_RULE_PATH c:\snort\so_rules
var PREPROC_RULE_PATH c:\snort\preproc_rules

# If you are using reputation preprocessor set these
var WHITE_LIST_PATH c:\snort\rules
var BLACK_LIST_PATH c:\snort\rules

###################################################
# Step #2: Configure the decoder.  For more information, see README.decode
###################################################

# Stop generic decode events:
config disable_decode_alerts

# Stop Alerts on experimental TCP options
config disable_tcpopt_experimental_alerts

# Stop Alerts on obsolete TCP options
config disable_tcpopt_obsolete_alerts

# Stop Alerts on T/TCP alerts
config disable_tcpopt_ttcp_alerts

# Stop Alerts on all other TCPOption type events:
config disable_tcpopt_alerts

# Stop Alerts on invalid ip options
config disable_ipopt_alerts

# Alert if value in length field (IP, TCP, UDP) is greater th elength of the packet
# config enable_decode_oversized_alerts

# Same as above, but drop packet if in Inline mode (requires enable_decode_oversized_alerts)
# config enable_decode_oversized_drops

# Configure IP / TCP checksum mode
config checksum_mode: all

# Configure maximum number of flowbit references.  For more information, see README.flowbits
# config flowbits_size: 64

# Configure ports to ignore
# config ignore_ports: tcp 21 6667:6671 1356
# config ignore_ports: udp 1:17 53

# Configure active response for non inline operation. For more information, see REAMDE.active
# config response: eth0 attempts 2

# Configure DAQ related options for inline operation. For more information, see README.daq
#
# config daq: <type>
# config daq_dir: <dir>
# config daq_mode: <mode>
# config daq_var: <var>
#
# <type> ::= pcap | afpacket | dump | nfq | ipq | ipfw
# <mode> ::= read-file | passive | inline
# <var> ::= arbitrary <name>=<value passed to DAQ
# <dir> ::= path as to where to look for DAQ module so's

# Configure specific UID and GID to run snort as after dropping privs. For more information see snort -h command line options
#
# config set_gid:
# config set_uid:

# Configure default snaplen. Snort defaults to MTU of in use interface. For more information see README
#
# config snaplen:
#

# Configure default bpf_file to use for filtering what traffic reaches snort. For more information see snort -h command line options (-F)
#
# config bpf_file:
#

# Configure default log directory for snort to log to.  For more information see snort -h command line options (-l)
#
config logdir:c:\snort\log


###################################################
# Step #3: Configure the base detection engine.  For more information, see  README.decode
###################################################

# Configure PCRE match limitations
config pcre_match_limit: 3500
config pcre_match_limit_recursion: 1500

# Configure the detection engine  See the Snort Manual, Configuring Snort - Includes - Config
config detection: search-method ac-split search-optimize max-pattern-len 20

# Configure the event queue.  For more information, see README.event_queue
config event_queue: max_queue 15 log 15 order_events content_length

###################################################
## Configure GTP if it is to be used.
## For more information, see README.GTP
####################################################

# config enable_gtp

###################################################
# Per packet and rule latency enforcement
# For more information see README.ppm
###################################################

# Per Packet latency configuration
#config ppm: max-pkt-time 250, \
#   fastpath-expensive-packets, \
#   pkt-log

# Per Rule latency configuration
#config ppm: max-rule-time 200, \
#   threshold 3, \
#   suspend-expensive-rules, \
#   suspend-timeout 20, \
#   rule-log alert

###################################################
# Configure Perf Profiling for debugging
# For more information see README.PerfProfiling
###################################################

#config profile_rules: print all, sort avg_ticks
#config profile_preprocs: print all, sort avg_ticks

###################################################
# Configure protocol aware flushing
# For more information see README.stream5
###################################################
config paf_max: 16000

###################################################
# Step #4: Configure dynamic loaded libraries.  
# For more information, see Snort Manual, Configuring Snort - Dynamic Modules
###################################################

# path to dynamic preprocessor libraries
#dynamicpreprocessor directory /usr/local/lib/snort_dynamicpreprocessor/

dynamicpreprocessor directory c:\snort\lib\snort_dynamicpreprocessor

# path to base preprocessor engine
#dynamicengine /usr/local/lib/snort_dynamicengine/libsf_engine.so

dynamicengine c:\snort\lib\snort_dynamicengine\sf_engine.dll

# path to dynamic rules libraries
#dynamicdetection directory /usr/local/lib/snort_dynamicrules

#dynamicdetection directory c:\snort\lib\snort_dynamicrules

###################################################
# Step #5: Configure preprocessors
# For more information, see the Snort Manual, Configuring Snort - Preprocessors
###################################################

# GTP Control Channle Preprocessor. For more information, see README.GTP
# preprocessor gtp: ports { 2123 3386 2152 }

# Inline packet normalization. For more information, see README.normalize
# Does nothing in IDS mode
#preprocessor normalize_ip4
#preprocessor normalize_tcp: block, rsv, pad, urp, req_urg, req_pay, req_urp, ips, ecn stream
#preprocessor normalize_icmp4
#preprocessor normalize_ip6
#preprocessor normalize_icmp6

# Target-based IP defragmentation.  For more inforation, see README.frag3
preprocessor frag3_global: max_frags 65536
preprocessor frag3_engine: policy windows detect_anomalies overlap_limit 10 min_fragment_length 100 timeout 180

# Target-Based stateful inspection/stream reassembly.  For more inforation, see README.stream5
preprocessor stream5_global: track_tcp yes, \
   track_udp yes, \
   track_icmp no, \
   max_tcp 262144, \
   max_udp 131072, \
   max_active_responses 2, \
   min_response_seconds 5
preprocessor stream5_tcp: policy windows, detect_anomalies, require_3whs 180, \
   overlap_limit 10, small_segments 3 bytes 150, timeout 180, \
    ports client 21 22 23 25 42 53 70 79 109 110 111 113 119 135 136 137 139 143 161 445 513 514 587 593 691 1433 1521 1741 2100 3306 6070 6665 6666 6667 6668 6669 7000 8181 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779, \
    ports both 36 80 81 82 83 84 85 86 87 88 89 90 110 311 323 383 443 444 465 555 563 591 593 623 631 636 664 801 808 818 901 972 989 992 993 994 995 1158 1220 1270 1414 1533 1581 1719 1720 1741 1801 1812 1830 1942 2231 2301 2375 2381 2578 2809 2869 2980 3000 3001 3029 3037 3057 3128 3300 3323 3443 3702 3901 4000 4343 4444 4848 5000 5054 5060 5061 5117 5222 5250 5416 5443 5450 5480 5555 5600 5814 5894 5984 5985 5986 6060 6080 6173 6988 7000 7001 7005 7070 7071 7080 7144 7145 7180 7181 7510 7770 7777 7778 7779 7801 7802 7900 7901 7902 7903 7904 7905 7906 7907 7908 7909 7910 7911 7912 7913 7914 7915 7916 7917 7918 7919 7920 8000 8001 8008 8014 8015 8020 8028 8040 8080 8081 8082 8085 8088 8090 8095 8118 8123 8161 8180 8181 8182 8222 8243 8280 8300 8333 8344 8393 8400 8443 8484 8500 8509 8511 8694 8787 8800 8848 8852 8880 8888 8899 8983 9000 9001 9002 9050 9060 9080 9090 9091 9111 9200 9201 9290 9443 9447 9502 9700 9710 9788 9830 9850 9990 9999 10000 10080 10100 10250 10255 10297 10443 11371 12601 13014 15489 15672 16000 16992 16993 16994 16995 17000 18081 19980 20000 29991 30007 30018 30888 33300 34412 34443 34444 36099 37215 40007 41080 44449 49152 49153 50000 50002 50452 51423 53331 54444 55252 55555 56712
preprocessor stream5_udp: timeout 180

# performance statistics.  For more information, see the Snort Manual, Configuring Snort - Preprocessors - Performance Monitor
# preprocessor perfmonitor: time 300 file /var/snort/snort.stats pktcnt 10000

# HTTP normalization and anomaly detection.  For more information, see README.http_inspect
preprocessor http_inspect: global iis_unicode_map unicode.map 1252 compress_depth 65535 decompress_depth 65535
preprocessor http_inspect_server: server default \
    http_methods { GET POST PUT SEARCH MKCOL COPY MOVE LOCK UNLOCK NOTIFY POLL BCOPY BDELETE BMOVE LINK UNLINK OPTIONS HEAD DELETE TRACE TRACK CONNECT SOURCE SUBSCRIBE UNSUBSCRIBE PROPFIND PROPPATCH BPROPFIND BPROPPATCH RPC_CONNECT PROXY_SUCCESS BITS_POST CCM_POST SMS_POST RPC_IN_DATA RPC_OUT_DATA RPC_ECHO_DATA } \
    chunk_length 500000 \
    server_flow_depth 0 \
    client_flow_depth 0 \
    post_depth 65495 \
    oversize_dir_length 500 \
    max_header_length 750 \
    max_headers 100 \
    max_spaces 200 \
    small_chunk_length { 10 5 } \
    ports { 36 80 81 82 83 84 85 86 87 88 89 90 311 323 383 443 444 555 591 593 623 631 664 801 808 818 901 972 1158 1220 1270 1414 1533 1581 1719 1720 1741 1801 1812 1830 1942 2231 2301 2375 2381 2578 2809 2869 2980 3000 3029 3037 3057 3128 3323 3443 3702 4000 4343 4444 4848 5000 5054 5060 5061 5117 5222 5250 5416 5443 5450 5480 5555 5600 5814 5894 5984 5985 5986 6060 6080 6173 6988 7000 7001 7005 7070 7071 7080 7144 7145 7180 7181 7510 7770 7777 7778 7779 8000 8001 8008 8014 8015 8020 8028 8040 8080 8081 8082 8085 8088 8090 8095 8118 8123 8161 8180 8181 8182 8222 8243 8280 8300 8333 8344 8393 8400 8443 8484 8500 8509 8511 8694 8787 8800 8848 8852 8880 8888 8899 8983 9000 9001 9002 9050 9060 9080 9090 9091 9111 9200 9201 9290 9443 9447 9502 9700 9710 9788 9830 9850 9990 9999 10000 10080 10100 10250 10255 10297 10443 11371 12601 13014 15489 15672 16000 16992 16993 16994 16995 17000 18081 19980 20000 29991 30007 30018 30888 33300 34412 34443 34444 36099 37215 40007 41080 44449 49152 49153 50000 50002 50452 51423 53331 54444 55252 55555 56712 } \
    non_rfc_char { 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 } \
    enable_cookie \
    extended_response_inspection \
    inspect_gzip \
    normalize_utf \
    unlimited_decompress \
    normalize_javascript \
    apache_whitespace no \
    ascii no \
    bare_byte no \
    directory no \
    double_decode no \
    iis_backslash no \
    iis_delimiter no \
    iis_unicode no \
    multi_slash no \
    utf_8 no \
    u_encode yes \
    webroot no \
    decompress_swf { deflate lzma } \
    decompress_pdf { deflate }

# ONC-RPC normalization and anomaly detection.  For more information, see the Snort Manual, Configuring Snort - Preprocessors - RPC Decode
preprocessor rpc_decode: 111 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779 no_alert_multiple_requests no_alert_large_fragments no_alert_incomplete

# Back Orifice detection.
#preprocessor bo

# FTP / Telnet normalization and anomaly detection.  For more information, see README.ftptelnet
preprocessor ftp_telnet: global inspection_type stateful encrypted_traffic no check_encrypted
preprocessor ftp_telnet_protocol: telnet \
    ayt_attack_thresh 20 \
    normalize ports { 23 } \
    detect_anomalies
preprocessor ftp_telnet_protocol: ftp server default \
    def_max_param_len 100 \
    ports { 21 2100 3535 } \
    telnet_cmds yes \
    ignore_telnet_erase_cmds yes \
    ftp_cmds { ABOR ACCT ADAT ALLO APPE AUTH CCC CDUP } \
    ftp_cmds { CEL CLNT CMD CONF CWD DELE ENC EPRT } \
    ftp_cmds { EPSV ESTA ESTP FEAT HELP LANG LIST LPRT } \
    ftp_cmds { LPSV MACB MAIL MDTM MIC MKD MLSD MLST } \
    ftp_cmds { MODE NLST NOOP OPTS PASS PASV PBSZ PORT } \
    ftp_cmds { PROT PWD QUIT REIN REST RETR RMD RNFR } \
    ftp_cmds { RNTO SDUP SITE SIZE SMNT STAT STOR STOU } \
    ftp_cmds { STRU SYST TEST TYPE USER XCUP XCRC XCWD } \
    ftp_cmds { XMAS XMD5 XMKD XPWD XRCP XRMD XRSQ XSEM } \
    ftp_cmds { XSEN XSHA1 XSHA256 } \
    alt_max_param_len 0 { ABOR CCC CDUP ESTA FEAT LPSV NOOP PASV PWD QUIT REIN STOU SYST XCUP XPWD } \
    alt_max_param_len 200 { ALLO APPE CMD HELP NLST RETR RNFR STOR STOU XMKD } \
    alt_max_param_len 256 { CWD RNTO } \
    alt_max_param_len 400 { PORT } \
    alt_max_param_len 512 { SIZE } \
    chk_str_fmt { ACCT ADAT ALLO APPE AUTH CEL CLNT CMD } \
    chk_str_fmt { CONF CWD DELE ENC EPRT EPSV ESTP HELP } \
    chk_str_fmt { LANG LIST LPRT MACB MAIL MDTM MIC MKD } \
    chk_str_fmt { MLSD MLST MODE NLST OPTS PASS PBSZ PORT } \
    chk_str_fmt { PROT REST RETR RMD RNFR RNTO SDUP SITE } \
    chk_str_fmt { SIZE SMNT STAT STOR STRU TEST TYPE USER } \
    chk_str_fmt { XCRC XCWD XMAS XMD5 XMKD XRCP XRMD XRSQ } \
    chk_str_fmt { XSEM XSEN XSHA1 XSHA256 } \
    cmd_validity ALLO < int [ char R int ] > \    
    cmd_validity EPSV < [ { char 12 | char A char L char L } ] > \
    cmd_validity MACB < string > \
    cmd_validity MDTM < [ date nnnnnnnnnnnnnn[.n[n[n]]] ] string > \
    cmd_validity MODE < char ASBCZ > \
    cmd_validity PORT < host_port > \
    cmd_validity PROT < char CSEP > \
    cmd_validity STRU < char FRPO [ string ] > \    
    cmd_validity TYPE < { char AE [ char NTC ] | char I | char L [ number ] } >
preprocessor ftp_telnet_protocol: ftp client default \
    max_resp_len 256 \
    bounce yes \
    ignore_telnet_erase_cmds yes \
    telnet_cmds yes


# SMTP normalization and anomaly detection.  For more information, see README.SMTP
preprocessor smtp: ports { 25 465 587 691 } \
    inspection_type stateful \
    b64_decode_depth 0 \
    qp_decode_depth 0 \
    bitenc_decode_depth 0 \
    uu_decode_depth 0 \
    log_mailfrom \
    log_rcptto \
    log_filename \
    log_email_hdrs \
    normalize cmds \
    normalize_cmds { ATRN AUTH BDAT CHUNKING DATA DEBUG EHLO EMAL ESAM ESND ESOM ETRN EVFY } \
    normalize_cmds { EXPN HELO HELP IDENT MAIL NOOP ONEX QUEU QUIT RCPT RSET SAML SEND SOML } \
    normalize_cmds { STARTTLS TICK TIME TURN TURNME VERB VRFY X-ADAT X-DRCP X-ERCP X-EXCH50 } \
    normalize_cmds { X-EXPS X-LINK2STATE XADR XAUTH XCIR XEXCH50 XGEN XLICENSE XQUE XSTA XTRN XUSR } \
    max_command_line_len 512 \
    max_header_line_len 1000 \
    max_response_line_len 512 \
    alt_max_command_line_len 260 { MAIL } \
    alt_max_command_line_len 300 { RCPT } \
    alt_max_command_line_len 500 { HELP HELO ETRN EHLO } \
    alt_max_command_line_len 255 { EXPN VRFY ATRN SIZE BDAT DEBUG EMAL ESAM ESND ESOM EVFY IDENT NOOP RSET } \
    alt_max_command_line_len 246 { SEND SAML SOML AUTH TURN ETRN DATA RSET QUIT ONEX QUEU STARTTLS TICK TIME TURNME VERB X-EXPS X-LINK2STATE XADR XAUTH XCIR XEXCH50 XGEN XLICENSE XQUE XSTA XTRN XUSR } \
    valid_cmds { ATRN AUTH BDAT CHUNKING DATA DEBUG EHLO EMAL ESAM ESND ESOM ETRN EVFY } \
    valid_cmds { EXPN HELO HELP IDENT MAIL NOOP ONEX QUEU QUIT RCPT RSET SAML SEND SOML } \
    valid_cmds { STARTTLS TICK TIME TURN TURNME VERB VRFY X-ADAT X-DRCP X-ERCP X-EXCH50 } \
    valid_cmds { X-EXPS X-LINK2STATE XADR XAUTH XCIR XEXCH50 XGEN XLICENSE XQUE XSTA XTRN XUSR } \
    xlink2state { enabled }

# Portscan detection.  For more information, see README.sfportscan
preprocessor sfportscan: proto  { all } memcap { 10000000 } sense_level { low }

# ARP spoof detection.  For more information, see the Snort Manual - Configuring Snort - Preprocessors - ARP Spoof Preprocessor
# preprocessor arpspoof
# preprocessor arpspoof_detect_host: 192.168.40.1 f0:0f:00:f0:0f:00

# SSH anomaly detection.  For more information, see README.ssh
preprocessor ssh: server_ports { 22 } \
                  autodetect \
                  max_client_bytes 19600 \
                  max_encrypted_packets 20 \
                  max_server_version_len 100 \
                  enable_respoverflow enable_ssh1crc32 \
                  enable_srvoverflow enable_protomismatch

# SMB / DCE-RPC normalization and anomaly detection.  For more information, see README.dcerpc2
preprocessor dcerpc2: memcap 102400, events [co ]
preprocessor dcerpc2_server: default, policy WinXP, \
    detect [smb [139,445], tcp 135, udp 135, rpc-over-http-server 593], \
    autodetect [tcp 1025:, udp 1025:, rpc-over-http-server 1025:], \
    smb_max_chain 3, smb_invalid_shares ["C$", "D$", "ADMIN$"]

# DNS anomaly detection.  For more information, see README.dns
preprocessor dns: ports { 53 } enable_rdata_overflow

# SSL anomaly detection and traffic bypass.  For more information, see README.ssl
preprocessor ssl: ports { 443 465 563 636 989 992 993 994 995 5061 7801 7802 7900 7901 7902 7903 7904 7905 7906 7907 7908 7909 7910 7911 7912 7913 7914 7915 7916 7917 7918 7919 7920 8443 }, trustservers, noinspect_encrypted

# SDF sensitive data preprocessor.  For more information see README.sensitive_data
preprocessor sensitive_data: alert_threshold 25

# SIP Session Initiation Protocol preprocessor.  For more information see README.sip
preprocessor sip: max_sessions 40000, \
   ports { 5060 5061 5600 }, \
   methods { invite \
             cancel \
             ack \
             bye \
             register \
             options \
             refer \
             subscribe \
             update \
             join \
             info \
             message \
             notify \
             benotify \
             do \
             qauth \
             sprack \
             publish \
             service \
             unsubscribe \
             prack }, \
   max_uri_len 512, \
   max_call_id_len 80, \
   max_requestName_len 20, \
   max_from_len 256, \
   max_to_len 256, \
   max_via_len 1024, \
   max_contact_len 512, \
   max_content_len 2048

# IMAP preprocessor.  For more information see README.imap
preprocessor imap: \
   ports { 143 } \
   b64_decode_depth 0 \
   qp_decode_depth 0 \
   bitenc_decode_depth 0 \
   uu_decode_depth 0

# POP preprocessor. For more information see README.pop
preprocessor pop: \
   ports { 110 } \
   b64_decode_depth 0 \
   qp_decode_depth 0 \
   bitenc_decode_depth 0 \
   uu_decode_depth 0

# Modbus preprocessor. For more information see README.modbus
preprocessor modbus: ports { 502 }

# DNP3 preprocessor. For more information see README.dnp3
preprocessor dnp3: ports { 20000 } \
   memcap 262144 \
   check_crc

# Reputation preprocessor. For more information see README.reputation
preprocessor reputation: \
   memcap 500, \
   priority whitelist, \
   nested_ip inner, \
   #whitelist $WHITE_LIST_PATH\whitelist.rules, \
   #blacklist $BLACK_LIST_PATH\blacklist.rules
whitelist $WHITE_LIST_PATH\white.list
blacklist $BLACK_LIST_PATH\black.list

###################################################
# Step #6: Configure output plugins
# For more information, see Snort Manual, Configuring Snort - Output Modules
###################################################

# unified2
# Recommended for most installs
# output unified2: filename merged.log, limit 128, nostamp, mpls_event_types, vlan_event_types

# Additional configuration for specific types of installs
# output alert_unified2: filename snort.alert, limit 128, nostamp
# output log_unified2: filename snort.log, limit 128, nostamp

# syslog
# output alert_syslog: LOG_AUTH LOG_ALERT

# pcap
# output log_tcpdump: tcpdump.log

# metadata reference data.  do not modify these lines
#include classification.config
include c:\snort\etc\classification.config
#include reference.config
include c:\snort\etc\reference.config


###################################################
# Step #7: Customize your rule set
# For more information, see Snort Manual, Writing Snort Rules
#
# NOTE: All categories are enabled in this conf file
###################################################

# site specific rules
include $RULE_PATH\local.rules

include $RULE_PATH\app-detect.rules
include $RULE_PATH\attack-responses.rules
include $RULE_PATH\backdoor.rules
include $RULE_PATH\bad-traffic.rules
include $RULE_PATH\blacklist.rules
include $RULE_PATH\botnet-cnc.rules
include $RULE_PATH\browser-chrome.rules
include $RULE_PATH\browser-firefox.rules
include $RULE_PATH\browser-ie.rules
include $RULE_PATH\browser-other.rules
include $RULE_PATH\browser-plugins.rules
include $RULE_PATH\browser-webkit.rules
include $RULE_PATH\chat.rules
include $RULE_PATH\content-replace.rules
include $RULE_PATH\ddos.rules
include $RULE_PATH\dns.rules
include $RULE_PATH\dos.rules
include $RULE_PATH\experimental.rules
include $RULE_PATH\exploit-kit.rules
include $RULE_PATH\exploit.rules
include $RULE_PATH\file-executable.rules
include $RULE_PATH\file-flash.rules
include $RULE_PATH\file-identify.rules
include $RULE_PATH\file-image.rules
include $RULE_PATH\file-java.rules
include $RULE_PATH\file-multimedia.rules
include $RULE_PATH\file-office.rules
include $RULE_PATH\file-other.rules
include $RULE_PATH\file-pdf.rules
include $RULE_PATH\finger.rules
include $RULE_PATH\ftp.rules
include $RULE_PATH\icmp-info.rules
include $RULE_PATH\icmp.rules
include $RULE_PATH\imap.rules
include $RULE_PATH\indicator-compromise.rules
include $RULE_PATH\indicator-obfuscation.rules
include $RULE_PATH\indicator-scan.rules
include $RULE_PATH\indicator-shellcode.rules
include $RULE_PATH\info.rules
include $RULE_PATH\malware-backdoor.rules
include $RULE_PATH\malware-cnc.rules
include $RULE_PATH\malware-other.rules
include $RULE_PATH\malware-tools.rules
include $RULE_PATH\misc.rules
include $RULE_PATH\multimedia.rules
include $RULE_PATH\mysql.rules
include $RULE_PATH\netbios.rules
include $RULE_PATH\nntp.rules
include $RULE_PATH\oracle.rules
include $RULE_PATH\os-linux.rules
include $RULE_PATH\os-mobile.rules
include $RULE_PATH\os-other.rules
include $RULE_PATH\os-solaris.rules
include $RULE_PATH\os-windows.rules
include $RULE_PATH\other-ids.rules
include $RULE_PATH\p2p.rules
include $RULE_PATH\phishing-spam.rules
include $RULE_PATH\policy-multimedia.rules
include $RULE_PATH\policy-other.rules
include $RULE_PATH\policy.rules
include $RULE_PATH\policy-social.rules
include $RULE_PATH\policy-spam.rules
include $RULE_PATH\pop2.rules
include $RULE_PATH\pop3.rules
include $RULE_PATH\protocol-dns.rules
include $RULE_PATH\protocol-finger.rules
include $RULE_PATH\protocol-ftp.rules
include $RULE_PATH\protocol-icmp.rules
include $RULE_PATH\protocol-imap.rules
include $RULE_PATH\protocol-nntp.rules
include $RULE_PATH\protocol-other.rules
include $RULE_PATH\protocol-pop.rules
include $RULE_PATH\protocol-rpc.rules
include $RULE_PATH\protocol-scada.rules
include $RULE_PATH\protocol-services.rules
include $RULE_PATH\protocol-snmp.rules
include $RULE_PATH\protocol-telnet.rules
include $RULE_PATH\protocol-tftp.rules
include $RULE_PATH\protocol-voip.rules
include $RULE_PATH\pua-adware.rules
include $RULE_PATH\pua-other.rules
include $RULE_PATH\pua-p2p.rules
include $RULE_PATH\pua-toolbars.rules
include $RULE_PATH\rpc.rules
include $RULE_PATH\rservices.rules
include $RULE_PATH\scada.rules
include $RULE_PATH\scan.rules
include $RULE_PATH\server-apache.rules
include $RULE_PATH\server-iis.rules
include $RULE_PATH\server-mail.rules
include $RULE_PATH\server-mssql.rules
include $RULE_PATH\server-mysql.rules
include $RULE_PATH\server-oracle.rules
include $RULE_PATH\server-other.rules
include $RULE_PATH\server-samba.rules
include $RULE_PATH\server-webapp.rules
include $RULE_PATH\shellcode.rules
include $RULE_PATH\smtp.rules
include $RULE_PATH\snmp.rules
include $RULE_PATH\specific-threats.rules
include $RULE_PATH\spyware-put.rules
include $RULE_PATH\sql.rules
include $RULE_PATH\telnet.rules
include $RULE_PATH\tftp.rules
include $RULE_PATH\virus.rules
include $RULE_PATH\voip.rules
include $RULE_PATH\web-activex.rules
include $RULE_PATH\web-attacks.rules
include $RULE_PATH\web-cgi.rules
include $RULE_PATH\web-client.rules
include $RULE_PATH\web-coldfusion.rules
include $RULE_PATH\web-frontpage.rules
include $RULE_PATH\web-iis.rules
include $RULE_PATH\web-misc.rules
include $RULE_PATH\web-php.rules
include $RULE_PATH\x11.rules

###################################################
# Step #8: Customize your preprocessor and decoder alerts
# For more information, see README.decoder_preproc_rules
###################################################

# decoder and preprocessor event rules
include $PREPROC_RULE_PATH\preprocessor.rules
include $PREPROC_RULE_PATH\decoder.rules
include $PREPROC_RULE_PATH\sensitive-data.rules

###################################################
# Step #9: Customize your Shared Object Snort Rules
# For more information, see http:/vrt-blog.snort.org/2009/01/using-vrt-certified-shared-object-rules.html
###################################################

# dynamic library rules
# include $SO_RULE_PATH/browser-chrome.rules
# include $SO_RULE_PATH/browser-ie.rules
# include $SO_RULE_PATH/browser-other.rules
# include $SO_RULE_PATH/exploit-kit.rules
# include $SO_RULE_PATH/file-executable.rules
# include $SO_RULE_PATH/file-flash.rules
# include $SO_RULE_PATH/file-image.rules
# include $SO_RULE_PATH/file-java.rules
# include $SO_RULE_PATH/file-multimedia.rules
# include $SO_RULE_PATH/file-office.rules
# include $SO_RULE_PATH/file-other.rules
# include $SO_RULE_PATH/file-pdf.rules
# include $SO_RULE_PATH/indicator-shellcode.rules
# include $SO_RULE_PATH/malware-cnc.rules
# include $SO_RULE_PATH/malware-other.rules
# include $SO_RULE_PATH/netbios.rules
# include $SO_RULE_PATH/os-linux.rules
# include $SO_RULE_PATH/os-other.rules
# include $SO_RULE_PATH/os-windows.rules
# include $SO_RULE_PATH/policy-other.rules
# include $SO_RULE_PATH/policy-social.rules
# include $SO_RULE_PATH/protocol-dns.rules
# include $SO_RULE_PATH/protocol-nntp.rules
# include $SO_RULE_PATH/protocol-other.rules
# include $SO_RULE_PATH/protocol-scada.rules
# include $SO_RULE_PATH/protocol-snmp.rules
# include $SO_RULE_PATH/protocol-tftp.rules
# include $SO_RULE_PATH/protocol-voip.rules
# include $SO_RULE_PATH/pua-p2p.rules
# include $SO_RULE_PATH/server-apache.rules
# include $SO_RULE_PATH/server-iis.rules
# include $SO_RULE_PATH/server-mail.rules
# include $SO_RULE_PATH/server-mysql.rules
# include $SO_RULE_PATH/server-oracle.rules
# include $SO_RULE_PATH/server-other.rules
# include $SO_RULE_PATH/server-webapp.rules

# Event thresholding or suppression commands. See threshold.conf
include threshold.conf



Mod: Añadida etiqueta GeSHi.
« Última modificación: 18 Agosto 2022, 21:51 pm por #!drvy » En línea

#!drvy


Desconectado Desconectado

Mensajes: 5.849



Ver Perfil WWW
Re: Sobre reglas snort
« Respuesta #8 en: 18 Agosto 2022, 21:59 pm »

Por lo que dicen en mailinglists, ese error se puede deber en realidad en la línea 327 donde se carga el lzma para los swf, que por lo visto si snort no fue compilado con soporte lzma fallá y luego no parsea el resto bien.

Entonces prueba a quitar lzma de la linea 327... pasando de esto:

Código
  1.    utf_8 no \
  2.    u_encode yes \
  3.    webroot no \
  4.    decompress_swf { deflate lzma } \
  5.    decompress_pdf { deflate }
  6.  
  7. # ONC-RPC normalization and anomaly detection.  For more information, see the Snort Manual, Configuring Snort - Preprocessors - RPC Decode

a esto:

Código
  1.    utf_8 no \
  2.    u_encode yes \
  3.    webroot no \
  4.    decompress_swf { deflate } \
  5.    decompress_pdf { deflate }
  6.  
  7. # ONC-RPC normalization and anomaly detection.  For more information, see the Snort Manual, Configuring Snort - Preprocessors - RPC Decode

Citar
Lo he hecho en word, pero esa línea queda dentro de una instrucción que nada tiene que ver. Estoy revisando a mano dónde está cada }, para ver si encuentro el que falta o sobra, pero ya eso lo había hecho en dos ocasiones anteriores. Voy a hacerlo con el notepad++, porque con el word, cada vez que hay una nueva línea, pone un número de línea, aunque haya una línea en blanco

Consejo: Nunca, nunca, nunca edites archivos de configuración en Word. Jamás. Te cargas el formato, metes CRLF en vez de LF, puedes cargarte hasta el encoding... siempre utiliza un editor de código, Notepad++, Sublime Text, Visual Studio Code etc...

Si ya has editado y guardado el archivo con Word, bórralo, descargarlo de nuevo y edítalo con un editor de código de los que te hemos mencionado. Las lineas las estabas contando mal y eso puede ser precisamente por el CRLF en vez de LF.


Saludos
« Última modificación: 18 Agosto 2022, 22:13 pm por #!drvy » En línea

Agustín Cuba

Desconectado Desconectado

Mensajes: 22


Ver Perfil
Re: Sobre reglas snort
« Respuesta #9 en: 19 Agosto 2022, 13:28 pm »

Voy a hacer lo que me indica. De paso, es muy buena la recomendación de no editar en word, aunque lo sabía, porque lo había leído en otras publicaciones, pero lo usé para el asunto de a numeración de cada línea, aunque tampoco sirvió para eso.
Ahora me pongo a realizar su recomendación sobre el cambio en la línea 327 y lo comento.

Desde ahora le agradezco tremendamente el tiempo dedicado a mi consulta. Gracias
En línea

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