[Snort-users] snort react action

free free.aaa at ...11827...
Wed Apr 6 10:58:19 EDT 2016


Albert,
thanks for response.
> # snort -V
>
>    ,,_     -*> Snort! <*-
>   o"  )~   Version 2.9.8.0 GRE (Build 229)
>    ''''    By Martin Roesch & The Snort Team: 
> http://www.snort.org/contact#team
>            Copyright (C) 2014-2015 Cisco and/or its affiliates. All 
> rights reserved.
>            Copyright (C) 1998-2013 Sourcefire, Inc., et al.
>            Using libpcap version 1.6.2
>            Using PCRE version: 8.35 2014-04-04
>            Using ZLIB version: 1.2.8

start command:
> # /usr/local/bin/snort -D -q -N -m 027 -d -l /var/log/snort -c 
> /etc/snort/snort.conf -i eth1

rule (only 1 rule) and config attached.


06.04.2016 17:47, Al Lewis (allewi) пишет:
> Hello,
>
> 	What version of snort are you using?
> 	What rule are you using?

> 	What command are you using to start snort?
> 	Do you have a config file you can share?
>
> Need a little more information sorry.
>
> Albert Lewis
> QA Software Engineer
> SOURCEfire, Inc. now part of Cisco
> 9780 Patuxent Woods Drive
> Columbia, MD 21046
> Phone: (office) 443.430.7112
> Email: allewi at ...589...
>
>
> -----Original Message-----
> From: free [mailto:free.aaa at ...11827...]
> Sent: Wednesday, April 06, 2016 3:28 AM
> To: snort-users at lists.sourceforge.net
> Subject: [Snort-users] snort react action
>
> Hi all!
> I made some rules with react action in them. With afpacket daq mode all is working fine, I see hijacked responses on the client. But when I switch daq to pfring react stops working. In logs I see that snort is matching the rule, but no action... Any help?
>
> Thanks in advance!
> Best regards,
> Alex
>
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-------------- next part --------------
reject tcp $HOME_NET any -> any 80 (msg:"tmp"; flow: to_server,established; uricontent:"popular/Teen/1.html"; content:"HOST: video-one.com"; nocase; http_header; react; sid:1000001; rev:1;)
-------------- next part --------------
ipvar HOME_NET [my_networks_here]
ipvar EXTERNAL_NET any
#ipvar EXTERNAL_NET !$HOME_NET
ipvar DNS_SERVERS $HOME_NET
ipvar SMTP_SERVERS $HOME_NET
ipvar HTTP_SERVERS $HOME_NET
ipvar SQL_SERVERS $HOME_NET
ipvar TELNET_SERVERS $HOME_NET
ipvar SSH_SERVERS $HOME_NET
ipvar FTP_SERVERS $HOME_NET
ipvar SIP_SERVERS $HOME_NET

portvar HTTP_PORTS [80,81,311,591,593,901,1220,1414,1830,2301,2381,2809,3128,3702,4343,5250,7001,7145,7510,7777,7779,8000,8008,8014,8028,8080,8088,8118,8123,8180,8181,8243,8280,8800,8888,8899,9080,9090,9091,9443,9999,11371,55555]

portvar SHELLCODE_PORTS !80
portvar ORACLE_PORTS 1024:
portvar SSH_PORTS 22
portvar FTP_PORTS [21,2100,3535]
portvar SIP_PORTS [5060,5061,5600]
portvar FILE_DATA_PORTS [$HTTP_PORTS,110,143]
portvar GTP_PORTS [2123,2152,3386]
ipvar 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]

var RULE_PATH /etc/snort/rules
var SO_RULE_PATH /etc/snort/so_rules
var PREPROC_RULE_PATH /etc/snort/preproc_rules

var WHITE_LIST_PATH /etc/snort/rules
var BLACK_LIST_PATH /etc/snort/rules

config disable_decode_alerts
config disable_tcpopt_experimental_alerts
config disable_tcpopt_obsolete_alerts
config disable_tcpopt_ttcp_alerts
config disable_tcpopt_alerts
config disable_ipopt_alerts

# config enable_decode_oversized_alerts
# config enable_decode_oversized_drops

config checksum_mode: none

# config flowbits_size: 64
# config ignore_ports: tcp 21 6667:6671 1356
# config ignore_ports: udp 1:17 53
#config ignore_ports: tcp 1:79 81:442 444:65000


# Configure active response for non inline operation. For more information, see REAMDE.active
config response: device eth0 dst_mac 88:43:E1:EB:F1:00 attempts 1

# Configure DAQ related options for inline operation. For more information, see README.daq
#
# config daq: <type>
config daq: pfring
#config daq: afpacket
config daq_dir: /usr/local/lib/daq
config daq_mode: passive
#config daq_var: clusterid=10
#

#
# <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: snort
config set_uid: snort

# 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: /etc/snort/snort.bpf
#

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


###################################################
# 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
#config detection: search-method ac search-optimize max-pattern-len 20

# Configure the event queue.  For more information, see README.event_queue
config event_queue: max_queue 8 log 3 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 50, \
#   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, filename performance.txt
config profile_preprocs: print all, sort avg_ticks, filename prep.txt

###################################################
# 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

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

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

###################################################
# 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: 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 no, \
   track_icmp no, \
   max_tcp 1048576, \
   max_udp 1048576, \
   max_active_responses 2, \
   min_response_seconds 5
preprocessor stream5_tcp: policy windows, require_3whs 180, \
   overlap_limit 10, small_segments 3 bytes 150, timeout 180, dont_store_large_packets, dont_reassemble_async, \
    ports client 21 22 23 25 42 53 79 109 110 111 113 119 135 136 137 139 143 \
        161 445 513 514 587 593 691 1433 1521 2100 3306 6070 6665 6666 6667 6668 6669 \
        7000 8181 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779, \
    ports both 80 81 311 443 465 563 591 593 636 901 989 992 993 994 995 1220 1414 1830 2301 2381 2809 3128 3702 4343 5250 7907 7001 7145 7510 7802 7777 7779 \
        7801 7900 7901 7902 7903 7904 7905 7906 7908 7909 7910 7911 7912 7913 7914 7915 7916 \
        7917 7918 7919 7920 8000 8008 8014 8028 8080 8088 8118 8123 8180 8243 8280 8800 8888 8899 9080 9090 9091 9443 9999 11371 55555
#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 1500 decompress_depth 1500
preprocessor http_inspect_server: server default \
    http_methods { GET } \
    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 0 \
    small_chunk_length { 10 5 } \
    ports { 80 81 311 591 593 901 1220 1414 1830 2301 2381 2809 3128 3702 4343 5250 7001 7145 7510 7777 7779 8000 8008 8014 8028 8080 8088 8118 8123 8180 8181 8243 8280 8800 8888 8899 9080 9090 9091 9443 9999 11371 55555 } \
    non_rfc_char { 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 } \
    normalize_utf \
    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

# 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

# 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

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

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

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

# Reputation preprocessor. For more information see README.reputation
#
# Note to Debian users: this is disabled since it is an experimental
# preprocessor. If you want to use it you have to create the rules files
# referenced below in the /etc/snort/rules directory
#
#preprocessor reputation: \
#   memcap 500, \
#   priority whitelist, \
#   nested_ip inner, \
#   whitelist $WHITE_LIST_PATH/white_list.rules, \
#   blacklist $BLACK_LIST_PATH/black_list.rules

###################################################
# 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

# database
# output database: alert, <db_type>, user=<username> password=<password> test dbname=<name> host=<hostname>
# output database: log, <db_type>, user=<username> password=<password> test dbname=<name> host=<hostname>
#
# On Debian Systems, the database configuration is kept in a separate file:
# /etc/snort/database.conf.
# This file can be empty, if you are not using any database information
# If you are using databases, please edit that file instead of this one, to
# ensure smoother upgrades to future versions of this package.
include database.conf
#
# prelude
# output alert_prelude

# metadata reference data.  do not modify these lines
include classification.config
include 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
###################################################

# Note for Debian users: The rules preinstalled in the system
# can be *very* out of date. For more information please read
# the /usr/share/doc/snort-rules-default/README.Debian file

# site specific rules
include $RULE_PATH/local.rules
include $RULE_PATH/1.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/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/exploit.rules
# include $RULE_PATH/file-identify.rules
##include $RULE_PATH/finger.rules
##include $RULE_PATH/ftp.rules
##include $RULE_PATH/icmp.rules
##include $RULE_PATH/icmp-info.rules
##include $RULE_PATH/imap.rules
##include $RULE_PATH/info.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/other-ids.rules
##include $RULE_PATH/p2p.rules
# include $RULE_PATH/phishing-spam.rules
##include $RULE_PATH/policy.rules
##include $RULE_PATH/pop2.rules
##include $RULE_PATH/pop3.rules
##include $RULE_PATH/rpc.rules
##include $RULE_PATH/rservices.rules
# include $RULE_PATH/scada.rules
##include $RULE_PATH/scan.rules
# Note: These rules are disable by default as they are
# too coarse grained. Enabling them causes a large
# performance impact
#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/web-attacks.rules
#include $RULE_PATH/community-sql-injection.rules
#include $RULE_PATH/community-web-client.rules
#include $RULE_PATH/community-web-dos.rules
#include $RULE_PATH/community-web-iis.rules
#include $RULE_PATH/community-web-misc.rules
#include $RULE_PATH/community-web-php.rules
#include $RULE_PATH/web-attacks.rules
#include $RULE_PATH/community-sql-injection.rules
#include $RULE_PATH/community-web-client.rules
#include $RULE_PATH/community-web-dos.rules
#include $RULE_PATH/community-web-iis.rules
#include $RULE_PATH/community-web-misc.rules
#include $RULE_PATH/community-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


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

config react: /etc/snort/block.html

config flexresp2_interface: eth0
config flexresp2_attempts: 2


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