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11_zeek_logs.conf
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######################## # zeek -> arkime session creation and enrichment
#
# see https://docs.zeek.org/en/stable/script-reference/log-files.html for Zeek logfile documentation
#
# see source.zeeklogs.js for the Arkime code that turns these into UI fields
#
# to profile, debug:
# - get filters sorted by execution time (where in > 0)
# $ docker-compose exec logstash curl -XGET http://localhost:9600/_node/stats/pipelines | jq -r '.. | .filters? // empty | .[] | objects | select (.events.in > 0) | [.id, .events.in, .events.out, .events.duration_in_millis] | join (";")' | sort -n -t ';' -k4
# - get filters where in != out
# $ docker-compose exec logstash curl -XGET http://localhost:9600/_node/stats/pipelines | jq -r '.. | .filters? // empty | .[] | objects | select (.events.in != .events.out) | [.id, .events.in, .events.out, .events.duration_in_millis] | join (";")'
#
# Copyright (c) 2022 Battelle Energy Alliance, LLC. All rights reserved.
#######################
filter {
if (([message] =~ /^\s*#/) or (![log][file][path])) {
drop { id => "drop_zeek_invalid_logs" }
}
# tags may have been specified, like: conn(tagA,tagB,tagC).log, extract the log type (conn) and the tags (tagA,tagB,tagC)
# also normalize log types with - in their names to _ (e.g., opcua-binary -> opcua_binary)
ruby {
id => "ruby_zeek_source_extract"
#↓Type ↓Tags
code => "
if fileParts = event.get('[log][file][path]').split('/').last.match(/^(.*?)(?:\((.*)\))?\.log/i) then
logType, tags = fileParts.captures
event.set('[log_source]', logType.gsub('-', '_')) unless logType.nil?
event.set('[@metadata][zeek_log_tags]', tags) unless tags.nil?
end"
}
# report types we're going to ignore
if (([log_source] == "bsap_ip_unknown") or
([log_source] == "bsap_serial_unknown") or
([log_source] == "ecat_arp_info") or
([log_source] == "reporter") or
([log_source] == "broker") or
([log_source] == "cluster") or
([log_source] == "capture_loss") or
([log_source] == "communication") or
([log_source] == "packet_filter") or
([log_source] == "png") or
([log_source] == "stats") or
([log_source] == "stderr") or
([log_source] == "stdout") or
([log_source] == "loaded_scripts")) {
drop { id => "drop_zeek_ignored_source" }
}
# remove some tags pulled from the filename we might not want
if ([@metadata][zeek_log_tags]) {
ruby {
id => "ruby_zeek_prune_tags"
code => "
filenameTags = event.get('[@metadata][zeek_log_tags]').split(',')
zeekFieldsTag = filenameTags.select { |str| str.start_with?('ZEEKFLDx') }
if (zeekFieldsTag.size > 0) then
zeekFieldsTags = zeekFieldsTag.first.split('x', 3)
if (zeekFieldsTags.size == 3) then
event.set('[@metadata][zeek_fields_bitmap_version]', zeekFieldsTags[1].to_i(16))
event.set('[@metadata][zeek_fields_bitmap]', zeekFieldsTags[2].to_i(16))
end
end
filenameTags.delete_if{|v| ((v == nil) or (v == '') or (v !~ /\D/) or (v =~ /\A\s*(ZEEKFLDx|autocarve)/i) or (v =~ /\A\s*(pcap|dmp|log|bro|zeek|tcpdump|netsniff|autozeek)s?\s*\z/i) or (v == event.get('[log_source]')))}
event.set('[@metadata][zeek_log_tags]', filenameTags.uniq)
"
#
# ZEEKFLDx00x01FFFFFF
# | | └ bitmap of included fields within field list
# | └ index into zeek-log-field-bitmap.py:ZEEK_LOG_FIELDS list indicating field configuration within differing Zeek versions
# └ indicates that the field list has been pre-processed by zeek-process-pcap.py
#
# when logstash-filter-dissect gets this implemented, we *may* not have to do this
# - see zeek-process-pcap.py for the format of the bitmap number
# - https://github.com/logstash-plugins/logstash-filter-dissect/issues/56
# - https://github.com/logstash-plugins/logstash-filter-dissect/issues/62
#
# todo: right now rather than using the bitmap intelligently to build the field list, I'm just looking for
# known preconfigurations. look into doing it "smart".
#
}
if ([@metadata][zeek_log_tags]) { mutate { id => "mutate_merge_zeek_log_tags"
merge => { "[tags]" => "[@metadata][zeek_log_tags]" } } }
}
# The Dissect is WAY faster than CSV, and quite a bit faster than mutate.split. However, it
# is not as flexible when it comes to missing or extra columns
# (See https://github.com/logstash-plugins/logstash-filter-dissect/issues/62)
#
# So, if the dissect filter fails, we're going to fall back to split-then-zip solution.
# This should be a good tradeoff between performance (in the case where the Zeek logs
# match what we think they should look like) and flexibility (when they don't).
#
# The one drawback is that if you make a change to the fields in dissect, make sure
# you make the corresponding change in the ruby init code.
if ([log_source] == "conn") {
#############################################################################################################################
# conn.log
# https://docs.zeek.org/en/stable/scripts/base/protocols/conn/main.zeek.html#type-Conn::Info
if ([@metadata][zeek_fields_bitmap] and [@metadata][zeek_fields_bitmap_version]) {
# bitmap conn.log field configuration version 0
#
# Todo: I need to just bite the bullet and code this up in a Ruby block rather than hardcoding values.
#
# vlan + mac + community_id: 0x3ffffff / 67108863
# vlan + mac: 0x1ffffff / 33554431
# mac + community_id: 0x39fffff / 60817407
# mac only: 0x19fffff / 27262975
# vlan + community_id: 0x27fffff / 41943039
# vlan only: 0x7fffff / 8388607
# community_id only: 0x1fffff / 2097151
# no custom fields:
if ([@metadata][zeek_fields_bitmap_version] == 0) {
if ([@metadata][zeek_fields_bitmap] == 67108863) {
# conn.log has vlans + macs + community_id
dissect {
id => "dissect_zeek_conn_with_all_fields"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][proto]} %{[zeek_cols][service]} %{[zeek_cols][duration]} %{[zeek_cols][orig_bytes]} %{[zeek_cols][resp_bytes]} %{[zeek_cols][conn_state]} %{[zeek_cols][local_orig]} %{[zeek_cols][local_resp]} %{[zeek_cols][missed_bytes]} %{[zeek_cols][history]} %{[zeek_cols][orig_pkts]} %{[zeek_cols][orig_ip_bytes]} %{[zeek_cols][resp_pkts]} %{[zeek_cols][resp_ip_bytes]} %{[zeek_cols][tunnel_parents]} %{[zeek_cols][vlan]} %{[zeek_cols][inner_vlan]} %{[zeek_cols][orig_l2_addr]} %{[zeek_cols][resp_l2_addr]} %{[zeek_cols][community_id]}"
}
}
} else if ([@metadata][zeek_fields_bitmap] == 33554431) {
# conn.log has vlans + macs
dissect {
id => "dissect_zeek_conn_with_vlan_and_mac_fields"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][proto]} %{[zeek_cols][service]} %{[zeek_cols][duration]} %{[zeek_cols][orig_bytes]} %{[zeek_cols][resp_bytes]} %{[zeek_cols][conn_state]} %{[zeek_cols][local_orig]} %{[zeek_cols][local_resp]} %{[zeek_cols][missed_bytes]} %{[zeek_cols][history]} %{[zeek_cols][orig_pkts]} %{[zeek_cols][orig_ip_bytes]} %{[zeek_cols][resp_pkts]} %{[zeek_cols][resp_ip_bytes]} %{[zeek_cols][tunnel_parents]} %{[zeek_cols][vlan]} %{[zeek_cols][inner_vlan]} %{[zeek_cols][orig_l2_addr]} %{[zeek_cols][resp_l2_addr]}"
}
}
} else if ([@metadata][zeek_fields_bitmap] == 60817407) {
# conn.log has macs + community_id
dissect {
id => "dissect_zeek_conn_with_mac_and_community_fields"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][proto]} %{[zeek_cols][service]} %{[zeek_cols][duration]} %{[zeek_cols][orig_bytes]} %{[zeek_cols][resp_bytes]} %{[zeek_cols][conn_state]} %{[zeek_cols][local_orig]} %{[zeek_cols][local_resp]} %{[zeek_cols][missed_bytes]} %{[zeek_cols][history]} %{[zeek_cols][orig_pkts]} %{[zeek_cols][orig_ip_bytes]} %{[zeek_cols][resp_pkts]} %{[zeek_cols][resp_ip_bytes]} %{[zeek_cols][tunnel_parents]} %{[zeek_cols][orig_l2_addr]} %{[zeek_cols][resp_l2_addr]} %{[zeek_cols][community_id]}"
}
}
} else if ([@metadata][zeek_fields_bitmap] == 27262975) {
# conn.log has macs
dissect {
id => "dissect_zeek_conn_with_mac_fields"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][proto]} %{[zeek_cols][service]} %{[zeek_cols][duration]} %{[zeek_cols][orig_bytes]} %{[zeek_cols][resp_bytes]} %{[zeek_cols][conn_state]} %{[zeek_cols][local_orig]} %{[zeek_cols][local_resp]} %{[zeek_cols][missed_bytes]} %{[zeek_cols][history]} %{[zeek_cols][orig_pkts]} %{[zeek_cols][orig_ip_bytes]} %{[zeek_cols][resp_pkts]} %{[zeek_cols][resp_ip_bytes]} %{[zeek_cols][tunnel_parents]} %{[zeek_cols][orig_l2_addr]} %{[zeek_cols][resp_l2_addr]}"
}
}
} else if ([@metadata][zeek_fields_bitmap] == 41943039) {
# conn.log has vlans + community_id
dissect {
id => "dissect_zeek_conn_with_vlan_and_community_fields"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][proto]} %{[zeek_cols][service]} %{[zeek_cols][duration]} %{[zeek_cols][orig_bytes]} %{[zeek_cols][resp_bytes]} %{[zeek_cols][conn_state]} %{[zeek_cols][local_orig]} %{[zeek_cols][local_resp]} %{[zeek_cols][missed_bytes]} %{[zeek_cols][history]} %{[zeek_cols][orig_pkts]} %{[zeek_cols][orig_ip_bytes]} %{[zeek_cols][resp_pkts]} %{[zeek_cols][resp_ip_bytes]} %{[zeek_cols][tunnel_parents]} %{[zeek_cols][vlan]} %{[zeek_cols][inner_vlan]} %{[zeek_cols][community_id]}"
}
}
} else if ([@metadata][zeek_fields_bitmap] == 8388607) {
# conn.log has vlans
dissect {
id => "dissect_zeek_conn_with_vlan_fields"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][proto]} %{[zeek_cols][service]} %{[zeek_cols][duration]} %{[zeek_cols][orig_bytes]} %{[zeek_cols][resp_bytes]} %{[zeek_cols][conn_state]} %{[zeek_cols][local_orig]} %{[zeek_cols][local_resp]} %{[zeek_cols][missed_bytes]} %{[zeek_cols][history]} %{[zeek_cols][orig_pkts]} %{[zeek_cols][orig_ip_bytes]} %{[zeek_cols][resp_pkts]} %{[zeek_cols][resp_ip_bytes]} %{[zeek_cols][tunnel_parents]} %{[zeek_cols][vlan]} %{[zeek_cols][inner_vlan]}"
}
}
} else if ([@metadata][zeek_fields_bitmap] == 2097151) {
# conn.log has community_id
dissect {
id => "dissect_zeek_conn_with_community_fields"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][proto]} %{[zeek_cols][service]} %{[zeek_cols][duration]} %{[zeek_cols][orig_bytes]} %{[zeek_cols][resp_bytes]} %{[zeek_cols][conn_state]} %{[zeek_cols][local_orig]} %{[zeek_cols][local_resp]} %{[zeek_cols][missed_bytes]} %{[zeek_cols][history]} %{[zeek_cols][orig_pkts]} %{[zeek_cols][orig_ip_bytes]} %{[zeek_cols][resp_pkts]} %{[zeek_cols][resp_ip_bytes]} %{[zeek_cols][tunnel_parents]} %{[zeek_cols][community_id]}"
}
}
} else if ([@metadata][zeek_fields_bitmap] == 2097151) {
# conn.log has no custom fields
dissect {
id => "dissect_zeek_conn_with_minimal_fields"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][proto]} %{[zeek_cols][service]} %{[zeek_cols][duration]} %{[zeek_cols][orig_bytes]} %{[zeek_cols][resp_bytes]} %{[zeek_cols][conn_state]} %{[zeek_cols][local_orig]} %{[zeek_cols][local_resp]} %{[zeek_cols][missed_bytes]} %{[zeek_cols][history]} %{[zeek_cols][orig_pkts]} %{[zeek_cols][orig_ip_bytes]} %{[zeek_cols][resp_pkts]} %{[zeek_cols][resp_ip_bytes]} %{[zeek_cols][tunnel_parents]}"
}
}
} else {
# who knows? the conn.log preprocessed bitmap is not one we're expecting, we've got to guess and cannot use dissect
mutate { id => "mutate_add_tag_dissect_failure_unknown_conn_bitmap"
add_tag => [ "_dissectfailure" ] }
}
} else {
# who knows? the conn.log preprocessed bitmap field list version is not one we're expecting, we've got to guess and cannot use dissect
mutate { id => "mutate_add_tag_dissect_failure_unknown_bitmap_conn_version"
add_tag => [ "_dissectfailure" ] }
}
} else {
# who knows? the conn.log was not preprocessed to determine fields, we've got to guess and cannot use dissect
mutate { id => "mutate_add_tag_dissect_failure_missing_conn_bitmap"
add_tag => [ "_dissectfailure" ] }
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_conn"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_conn"
init => "$zeek_conn_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'proto', 'service', 'duration', 'orig_bytes', 'resp_bytes', 'conn_state', 'local_orig', 'local_resp', 'missed_bytes', 'history', 'orig_pkts', 'orig_ip_bytes', 'resp_pkts', 'resp_ip_bytes', 'tunnel_parents', 'vlan', 'inner_vlan', 'orig_l2_addr', 'resp_l2_addr', 'community_id' ]"
code => "event.set('[zeek_cols]', $zeek_conn_field_names.zip(event.get('[message]')).to_h)"
}
}
# normalize service string(s)
# some services are named like blah_udp/blah_tcp/blah_data, and we don't care about the suffix
mutate { id => "mutate_gsub_field_zeek_conn_service_protocol_suffix"
gsub => [ "[zeek_cols][service]", "[_-](tcp|udp|data)", "" ] }
if ([zeek_cols][service] =~ /^spicy_/) {
# if it's coming from spicy, we don't care to have that in the service name
mutate { id => "mutate_gsub_field_zeek_conn_service_spicy_prefix"
gsub => [ "[zeek_cols][service]", "^spicy_", "" ] }
mutate { id => "mutate_gsub_field_zeek_conn_service_spicy_cipher_suffix"
gsub => [ "[zeek_cols][service]", "(_hmac)?(_(sha|md)\d+)?$", "" ] }
}
if ([zeek_cols][service] =~ /^irc[_-]/) {
mutate { id => "mutate_replace_zeek_conn_service_irc_data"
replace => { "[zeek_cols][service]" => "irc" } }
}
if ([zeek_cols][service] == "ipsec_ike") {
mutate { id => "mutate_replace_zeek_conn_service_ipsec_ike"
replace => { "[zeek_cols][service]" => "ipsec" } }
}
if ([zeek_cols][service] == "rdpeudp") {
mutate { id => "mutate_replace_zeek_conn_service_rdpeudp"
replace => { "[zeek_cols][service]" => "rdp" } }
}
mutate { id => "mutate_add_field_zeek_conn_segmentCnt"
add_field => { "[segmentCnt]" => "1" } }
if ([zeek_cols][orig_ip_bytes]) and ([zeek_cols][orig_ip_bytes] != '-') and ([zeek_cols][orig_ip_bytes] != '(empty)') and ([zeek_cols][orig_ip_bytes] != '') {
mutate { id => "mutate_add_field_zeek_srcBytes"
add_field => { "[source][bytes]" => "%{[zeek_cols][orig_ip_bytes]}" } }
}
if ([zeek_cols][resp_ip_bytes]) and ([zeek_cols][resp_ip_bytes] != '-') and ([zeek_cols][resp_ip_bytes] != '(empty)') and ([zeek_cols][resp_ip_bytes] != '') {
mutate { id => "mutate_add_field_zeek_dstBytes"
add_field => { "[destination][bytes]" => "%{[zeek_cols][resp_ip_bytes]}" } }
}
if ([zeek_cols][orig_pkts]) and ([zeek_cols][orig_pkts] != '-') and ([zeek_cols][orig_pkts] != '(empty)') and ([zeek_cols][orig_pkts] != '') {
mutate { id => "mutate_add_field_zeek_srcPackets"
add_field => { "[source][packets]" => "%{[zeek_cols][orig_pkts]}" } }
}
if ([zeek_cols][orig_bytes]) and ([zeek_cols][orig_bytes] != '-') and ([zeek_cols][orig_bytes] != '(empty)') and ([zeek_cols][orig_bytes] != '') {
mutate { id => "mutate_add_field_zeek_srcDataBytes"
add_field => { "[client][bytes]" => "%{[zeek_cols][orig_bytes]}" } }
}
if ([zeek_cols][resp_pkts]) and ([zeek_cols][resp_pkts] != '-') and ([zeek_cols][resp_pkts] != '(empty)') and ([zeek_cols][resp_pkts] != '') {
mutate { id => "mutate_add_field_zeek_dstPackets"
add_field => { "[destination][packets]" => "%{[zeek_cols][resp_pkts]}" } }
}
if ([zeek_cols][resp_bytes]) and ([zeek_cols][resp_bytes] != '-') and ([zeek_cols][resp_bytes] != '(empty)') and ([zeek_cols][resp_bytes] != '') {
mutate { id => "mutate_add_field_zeek_dstDataBytes"
add_field => { "[server][bytes]" => "%{[zeek_cols][resp_bytes]}" } }
}
if ([zeek_cols][tunnel_parents]) and ([zeek_cols][tunnel_parents] != '(empty)') and ([zeek_cols][tunnel_parents] != '-') and ([zeek_cols][tunnel_parents] != '') {
mutate { id => "mutate_split_zeek_tunnel_parents"
split => { "[zeek_cols][tunnel_parents]" => "," } }
mutate { id => "mutate_add_field_zeek_conn_rootId"
add_field => { "[rootId]" => "%{[zeek_cols][tunnel_parents][0]}" } }
}
} else if ([log_source] == "bacnet") {
#############################################################################################################################
# bacnet.log
# https://github.com/cisagov/ICSNPP
dissect {
id => "dissect_zeek_bacnet"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][bvlc_function]} %{[zeek_cols][pdu_type]} %{[zeek_cols][pdu_service]} %{[zeek_cols][invoke_id]} %{[zeek_cols][result_code]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_bacnet"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_bacnet"
init => "$zeek_bacnet_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'bvlc_function', 'pdu_type', 'pdu_service', 'invoke_id', 'result_code' ]"
code => "event.set('[zeek_cols]', $zeek_bacnet_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_bacnet"
add_field => {
"[zeek_cols][proto]" => "udp"
"[zeek_cols][service]" => "bacnet"
}
}
mutate { id => "mutate_add_tag_ics_bacnet_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "bestguess") {
#############################################################################################################################
# bestguess.log
dissect {
id => "dissect_zeek_bestguess"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][proto]} %{[zeek_cols][name]} %{[zeek_cols][category]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_bestguess"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_bestguess"
init => "$zeek_bestguess_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'proto', 'name', 'category' ]"
code => "event.set('[zeek_cols]', $zeek_bestguess_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate { id => "mutate_add_tag_ics_best_guess_log"
add_tag => [ "ics_best_guess" ] }
} else if ([log_source] == "bsap_ip_header") {
#############################################################################################################################
# bsap_ip_header.log
# https://github.com/cisagov/ICSNPP
dissect {
id => "dissect_zeek_bsap_ip_header"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][num_msg]} %{[zeek_cols][type_name]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_bsap_ip_header"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_bsap_ip_header"
init => "$zeek_bsap_ip_header_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'num_msg', 'type_name' ]"
code => "event.set('[zeek_cols]', $zeek_bsap_ip_header_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_bsap_ip_header"
add_field => {
"[zeek_cols][proto]" => "udp"
"[zeek_cols][service]" => "bsap"
}
}
mutate { id => "mutate_add_tag_ics_bsap_ip_header_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "bsap_ip_rdb") {
#############################################################################################################################
# bsap_ip_rdb.log
# https://github.com/cisagov/ICSNPP
dissect {
id => "dissect_zeek_bsap_ip_rdb"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][header_size]} %{[zeek_cols][mes_seq]} %{[zeek_cols][res_seq]} %{[zeek_cols][data_len]} %{[zeek_cols][sequence]} %{[zeek_cols][app_func_code]} %{[zeek_cols][node_status]} %{[zeek_cols][func_code]} %{[zeek_cols][data]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_bsap_ip_rdb"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_bsap_ip_rdb"
init => "$zeek_bsap_ip_rdb_field_names = [ 'ts', 'uid', 'header_size', 'mes_seq', 'res_seq', 'data_len', 'sequence', 'app_func_code', 'node_status', 'func_code', 'data' ]"
code => "event.set('[zeek_cols]', $zeek_bsap_ip_rdb_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_bsap_ip_rdb"
add_field => {
"[zeek_cols][proto]" => "udp"
"[zeek_cols][service]" => "bsap"
}
}
# for now, drop hex-encoded binary data for size
if ([zeek_cols][data]) {
mutate { id => "mutate_remove_field_zeek_bsap_ip_rdb_data"
remove_field => [ "[zeek_cols][data]" ] }
}
mutate { id => "mutate_add_tag_ics_bsap_ip_rdb_data_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "bsap_ip_unknown") {
#############################################################################################################################
# bsap_ip_unknown.log (dropped for now, see above)
# https://github.com/cisagov/ICSNPP
dissect {
id => "dissect_zeek_bsap_ip_unknown"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][data]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_bsap_ip_unknown"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_bsap_ip_unknown"
init => "$zeek_bsap_ip_unknown_field_names = [ 'ts', 'uid', 'data' ]"
code => "event.set('[zeek_cols]', $zeek_bsap_ip_unknown_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_bsap_ip_unknown"
add_field => {
"[zeek_cols][proto]" => "udp"
"[zeek_cols][service]" => "bsap"
}
}
mutate { id => "mutate_add_tag_ics_bsap_ip_unknown_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "bsap_serial_header") {
#############################################################################################################################
# bsap_serial_header.log
# https://github.com/cisagov/ICSNPP
dissect {
id => "dissect_zeek_bsap_serial_header"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][ser]} %{[zeek_cols][dadd]} %{[zeek_cols][sadd]} %{[zeek_cols][ctl]} %{[zeek_cols][dfun]} %{[zeek_cols][seq]} %{[zeek_cols][sfun]} %{[zeek_cols][nsb]} %{[zeek_cols][type_name]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_bsap_serial_header"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_bsap_serial_header"
init => "$zeek_bsap_serial_header_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'ser', 'dadd', 'sadd', 'ctl', 'dfun', 'seq', 'sfun', 'nsb', 'type_name' ]"
code => "event.set('[zeek_cols]', $zeek_bsap_serial_header_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_bsap_serial_header"
add_field => {
"[zeek_cols][proto]" => "serial"
"[zeek_cols][service]" => "bsap"
}
}
mutate { id => "mutate_add_tag_ics_bsap_serial_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "bsap_serial_rdb") {
#############################################################################################################################
# bsap_serial_rdb.log
# https://github.com/cisagov/ICSNPP
dissect {
id => "dissect_zeek_bsap_serial_rdb"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][func_code]} %{[zeek_cols][data]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_bsap_serial_rdb"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_bsap_serial_rdb"
init => "$zeek_bsap_serial_rdb_field_names = [ 'ts', 'uid', 'func_code', 'data' ]"
code => "event.set('[zeek_cols]', $zeek_bsap_serial_rdb_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_bsap_serial_rdb"
add_field => {
"[zeek_cols][proto]" => "serial"
"[zeek_cols][service]" => "bsap"
}
}
# for now, drop hex-encoded binary data for size
if ([zeek_cols][data]) {
mutate { id => "mutate_remove_field_zeek_bsap_serial_rdb_data"
remove_field => [ "[zeek_cols][data]" ] }
}
mutate { id => "mutate_add_tag_ics_bsap_serial_rdb_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "bsap_serial_rdb_ext") {
#############################################################################################################################
# bsap_serial_rdb_ext.log
# https://github.com/cisagov/ICSNPP
dissect {
id => "dissect_zeek_bsap_serial_rdb_ext"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][dfun]} %{[zeek_cols][seq]} %{[zeek_cols][sfun]} %{[zeek_cols][nsb]} %{[zeek_cols][extfun]} %{[zeek_cols][data]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_bsap_serial_rdb_ext"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_bsap_serial_rdb_ext"
init => "$zeek_bsap_serial_rdb_ext_field_names = [ 'ts', 'uid', 'dfun', 'seq', 'sfun', 'nsb', 'extfun', 'data' ]"
code => "event.set('[zeek_cols]', $zeek_bsap_serial_rdb_ext_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_bsap_serial_rdb_ext"
add_field => {
"[zeek_cols][proto]" => "serial"
"[zeek_cols][service]" => "bsap"
}
}
# for now, drop hex-encoded binary data for size
if ([zeek_cols][data]) {
mutate { id => "mutate_remove_field_zeek_bsap_serial_rdb_ext_data"
remove_field => [ "[zeek_cols][data]" ] }
}
mutate { id => "mutate_add_tag_ics_bsap_serial_rdb_ext_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "bsap_serial_unknown") {
#############################################################################################################################
# bsap_serial_unknown.log (dropped for now, see above)
# https://github.com/cisagov/ICSNPP
dissect {
id => "dissect_zeek_bsap_serial_unknown"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][data]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_bsap_serial_unknown"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_bsap_serial_unknown"
init => "$zeek_bsap_serial_unknown_field_names = [ 'ts', 'uid', 'data' ]"
code => "event.set('[zeek_cols]', $zeek_bsap_serial_unknown_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_bsap_serial_unknown"
add_field => {
"[zeek_cols][proto]" => "serial"
"[zeek_cols][service]" => "bsap"
}
}
mutate { id => "mutate_add_tag_ics_bsap_serial_unknown_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "bacnet_discovery") {
#############################################################################################################################
# bacnet_discovery.log
# https://github.com/cisagov/ICSNPP
dissect {
id => "dissect_zeek_bacnet_discovery"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][pdu_service]} %{[zeek_cols][object_type]} %{[zeek_cols][instance_number]} %{[zeek_cols][vendor]} %{[zeek_cols][range]} %{[zeek_cols][object_name]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_bacnet_discovery"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_bacnet_discovery"
init => "$zeek_bacnet_discovery_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'pdu_service', 'object_type', 'instance_number', 'vendor', 'range', 'object_name' ]"
code => "event.set('[zeek_cols]', $zeek_bacnet_discovery_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_bacnet_discovery"
add_field => {
"[zeek_cols][proto]" => "udp"
"[zeek_cols][service]" => "bacnet"
}
}
mutate { id => "mutate_add_tag_ics_bacnet_discovery_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "bacnet_property") {
#############################################################################################################################
# bacnet_property.log
# https://github.com/cisagov/ICSNPP
dissect {
id => "dissect_zeek_bacnet_property"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][pdu_service]} %{[zeek_cols][object_type]} %{[zeek_cols][instance_number]} %{[zeek_cols][property]} %{[zeek_cols][array_index]} %{[zeek_cols][value]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_bacnet_property"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_bacnet_property"
init => "$zeek_bacnet_property_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'pdu_service', 'object_type', 'instance_number', 'property', 'array_index', 'value' ]"
code => "event.set('[zeek_cols]', $zeek_bacnet_property_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_bacnet_property"
add_field => {
"[zeek_cols][proto]" => "udp"
"[zeek_cols][service]" => "bacnet"
}
}
mutate { id => "mutate_add_tag_ics_bacnet_property_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "cip") {
#############################################################################################################################
# cip.log
# https://github.com/cisagov/ICSNPP
#
# todo: class_id, instance_id is a hex integer, should it be converted to an integer?
dissect {
id => "dissect_zeek_cip"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][cip_sequence_count]} %{[zeek_cols][direction]} %{[zeek_cols][cip_service_code]} %{[zeek_cols][cip_service]} %{[zeek_cols][cip_status]} %{[zeek_cols][class_id]} %{[zeek_cols][class_name]} %{[zeek_cols][instance_id]} %{[zeek_cols][attribute_id]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_cip"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_cip"
init => "$zeek_cip_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'cip_sequence_count', 'direction', 'cip_service', 'cip_status', 'class_id', 'class_name', 'instance_id', 'attribute_id' ]"
code => "event.set('[zeek_cols]', $zeek_cip_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_cip"
add_field => { "[zeek_cols][service]" => "cip" }
}
mutate { id => "mutate_add_tag_ics_cip_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "cip_identity") {
#############################################################################################################################
# cip_identity.log
# https://github.com/cisagov/ICSNPP
#
# TODO: device_status and device_state are a hex int string, convert to int?
dissect {
id => "dissect_zeek_cip_identity"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][encapsulation_version]} %{[zeek_cols][socket_address]} %{[zeek_cols][socket_port]} %{[zeek_cols][vendor_id]} %{[zeek_cols][vendor_name]} %{[zeek_cols][device_type_id]} %{[zeek_cols][device_type_name]} %{[zeek_cols][product_code]} %{[zeek_cols][revision]} %{[zeek_cols][device_status]} %{[zeek_cols][serial_number]} %{[zeek_cols][product_name]} %{[zeek_cols][device_state]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_cip_identity"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_cip_identity"
init => "$zeek_cip_identity_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'encapsulation_version', 'socket_address', 'socket_port', 'vendor_id', 'vendor_name', 'device_type_id', 'device_type_name', 'product_code', 'device_status', 'serial_number', 'product_name', 'device_state' ]"
code => "event.set('[zeek_cols]', $zeek_cip_identity_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_cip_identity"
add_field => { "[zeek_cols][service]" => "cip" }
}
mutate { id => "mutate_add_tag_ics_cip_identity_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "cip_io") {
#############################################################################################################################
# cip_io.log
# https://github.com/cisagov/ICSNPP
#
dissect {
id => "dissect_zeek_cip_io"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][connection_id]} %{[zeek_cols][sequence_number]} %{[zeek_cols][data_length]} %{[zeek_cols][io_data]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_cip_io"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_cip_io"
init => "$zeek_cip_io_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'connection_id', 'sequence_number', 'data_length', 'io_data' ]"
code => "event.set('[zeek_cols]', $zeek_cip_io_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_cip_io"
add_field => { "[zeek_cols][service]" => "cip" }
}
# for now, drop hex-encoded binary io_data for size
if ([zeek_cols][io_data]) {
mutate { id => "mutate_remove_field_zeek_cip_io_io_data"
remove_field => [ "[zeek_cols][io_data]" ] }
}
mutate { id => "mutate_add_tag_ics_cip_io_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "dce_rpc") {
#############################################################################################################################
# dce_rpc.log
# https://docs.zeek.org/en/stable/scripts/base/protocols/dce-rpc/main.zeek.html#type-DCE_RPC::Info
dissect {
id => "dissect_zeek_dce_rpc"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][rtt]} %{[zeek_cols][named_pipe]} %{[zeek_cols][endpoint]} %{[zeek_cols][operation]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_dce_rpc"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_dce_rpc"
init => "$zeek_dce_rpc_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'rtt', 'named_pipe', 'endpoint', 'operation' ]"
code => "event.set('[zeek_cols]', $zeek_dce_rpc_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_dce_rpc"
add_field => {
"[zeek_cols][proto]" => "tcp"
"[zeek_cols][service]" => "dce_rpc"
}
}
} else if ([log_source] == "dhcp") {
#############################################################################################################################
# dhcp.log
# https://docs.zeek.org/en/stable/scripts/base/protocols/dhcp/main.zeek.html#type-DHCP::Info
if ([@metadata][zeek_fields_bitmap] and [@metadata][zeek_fields_bitmap_version]) {
# bitmap dhcp.log field configuration version 0
#
# all fields: 0x000003FF / 1023
#
# bitmap dhcp.log field configuration version 1
#
# all fields : 0x0001FFFF / 131071
# all fields minus software: 0x00007FFF / 32767
if ([@metadata][zeek_fields_bitmap_version] == 0) {
if ([@metadata][zeek_fields_bitmap] == 1023) {
dissect {
id => "dissect_zeek_dhcp_0_with_all_fields"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][orig_l2_addr]} %{[zeek_cols][assigned_ip]} %{[zeek_cols][lease_time]} %{[zeek_cols][trans_id]}"
}
}
} else {
# who knows? the dhcp.log preprocessed bitmap is not one we're expecting, we've got to guess and cannot use dissect
mutate { id => "mutate_add_tag_dissect_failure_unknown_dhcp_0_bitmap"
add_tag => [ "_dissectfailure" ] }
}
} else if ([@metadata][zeek_fields_bitmap_version] == 1) {
if ([@metadata][zeek_fields_bitmap] == 131071) {
dissect {
id => "dissect_zeek_dhcp_1_with_all_fields"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][resp_h]} %{[zeek_cols][orig_l2_addr]} %{[zeek_cols][host_name]} %{[zeek_cols][client_fqdn]} %{[zeek_cols][domain]} %{[zeek_cols][requested_ip]} %{[zeek_cols][assigned_ip]} %{[zeek_cols][lease_time]} %{[zeek_cols][client_message]} %{[zeek_cols][server_message]} %{[zeek_cols][msg_types]} %{[zeek_cols][duration]} %{[zeek_cols][client_software]} %{[zeek_cols][server_software]}"
}
}
} else if ([@metadata][zeek_fields_bitmap] == 32767) {
dissect {
id => "dissect_zeek_dhcp_1_with_all_fields_minus_software"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][resp_h]} %{[zeek_cols][orig_l2_addr]} %{[zeek_cols][host_name]} %{[zeek_cols][client_fqdn]} %{[zeek_cols][domain]} %{[zeek_cols][requested_ip]} %{[zeek_cols][assigned_ip]} %{[zeek_cols][lease_time]} %{[zeek_cols][client_message]} %{[zeek_cols][server_message]} %{[zeek_cols][msg_types]} %{[zeek_cols][duration]}"
}
}
} else {
# who knows? the dhcp.log preprocessed bitmap is not one we're expecting, we've got to guess and cannot use dissect
mutate { id => "mutate_add_tag_dissect_failure_unknown_dhcp_1_bitmap"
add_tag => [ "_dissectfailure" ] }
}
} else {
# who knows? the dhcp.log preprocessed bitmap field list version is not one we're expecting, we've got to guess and cannot use dissect
mutate { id => "mutate_add_tag_dissect_failure_unknown_bitmap_dhcp_version"
add_tag => [ "_dissectfailure" ] }
}
} else {
# who knows? the dhcp.log was not preprocessed to determine fields, we've got to guess and cannot use dissect
mutate { id => "mutate_add_tag_dissect_failure_missing_dhcp_bitmap"
add_tag => [ "_dissectfailure" ] }
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_dhcp"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_dhcp"
init => "$zeek_dhcp_field_names = [ 'ts', 'uid', 'orig_h', 'resp_h', 'orig_l2_addr', 'host_name', 'client_fqdn', 'domain', 'requested_ip', 'assigned_ip', 'lease_time', 'client_message', 'server_message', 'msg_types', 'duration', 'client_software', 'server_software' ]"
code => "event.set('[zeek_cols]', $zeek_dhcp_field_names.zip(event.get('[message]')).to_h)"
}
}
if ([zeek_cols][uid]) and ([zeek_cols][uid] != '(empty)') and ([zeek_cols][uid] != '') {
mutate { id => "mutate_split_zeek_dhcp_uids"
split => { "[zeek_cols][uid]" => "," } }
}
if ([zeek_cols][uid] and [zeek_cols][uid][0]) {
mutate { id => "mutate_add_field_zeek_dhcp_uids"
add_field => { "[rootId]" => "%{[zeek_cols][uid][0]}" } }
}
if ((![zeek_cols][orig_p]) and (![zeek_cols][resp_p])) {
mutate {
id => "mutate_add_field_zeek_dhcp_ports"
add_field => {
"[zeek_cols][orig_p]" => 68
"[zeek_cols][resp_p]" => 67
}
}
}
mutate {
id => "mutate_add_fields_zeek_dhcp"
add_field => {
"[zeek_cols][proto]" => "udp"
"[zeek_cols][service]" => "dhcp"
}
}
} else if ([log_source] == "dnp3") {
#############################################################################################################################
# dnp3.log
# https://docs.zeek.org/en/stable/scripts/base/protocols/dnp3/main.zeek.html#type-DNP3::Info
dissect {
id => "dissect_zeek_dnp3"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][fc_request]} %{[zeek_cols][fc_reply]} %{[zeek_cols][iin]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_dnp3"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
split => { "[message]" => " " }
}
ruby {
id => "ruby_zip_zeek_dnp3"
init => "$zeek_dnp3_field_names = [ 'ts', 'uid', 'orig_h', 'orig_p', 'resp_h', 'resp_p', 'fc_request', 'fc_reply', 'iin' ]"
code => "event.set('[zeek_cols]', $zeek_dnp3_field_names.zip(event.get('[message]')).to_h)"
}
}
mutate {
id => "mutate_add_fields_zeek_dnp3"
add_field => { "[zeek_cols][service]" => "dnp3" }
}
mutate { id => "mutate_add_tag_ics_dnp3_log"
add_tag => [ "ics" ] }
} else if ([log_source] == "dnp3_control") {
#############################################################################################################################
# dnp3_control.log
# https://github.com/cisagov/ICSNPP
dissect {
id => "dissect_zeek_dnp3_control"
# zeek's default delimiter is a literal tab, MAKE SURE YOUR EDITOR DOESN'T SCREW IT UP
mapping => {
"[message]" => "%{[zeek_cols][ts]} %{[zeek_cols][uid]} %{[zeek_cols][orig_h]} %{[zeek_cols][orig_p]} %{[zeek_cols][resp_h]} %{[zeek_cols][resp_p]} %{[zeek_cols][block_type]} %{[zeek_cols][function_code]} %{[zeek_cols][index_number]} %{[zeek_cols][trip_control_code]} %{[zeek_cols][operation_type]} %{[zeek_cols][execute_count]} %{[zeek_cols][on_time]} %{[zeek_cols][off_time]} %{[zeek_cols][status_code]}"
}
}
if ("_dissectfailure" in [tags]) {
mutate {
id => "mutate_split_zeek_dnp3_control"