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Copy path1200_zeek_mutate.conf
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1200_zeek_mutate.conf
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# Copyright (c) 2025 Battelle Energy Alliance, LLC. All rights reserved.
filter {
if ([zeek_cols]) {
# remove unset (-) or "(empty)" top-level field values
ruby {
id => "ruby_zeek_remove_empty_values"
path => "/usr/share/logstash/malcolm-ruby/compact_event.rb"
}
} else {
drop { id => "drop_dissect_error" }
}
# ECS - "zeek" -> event.provider
if (![event][provider]) { mutate { id => "mutate_add_field_event_provider_zeek"
add_field => { "[event][provider]" => "zeek" } } }
if (![host][name]) and ([agent][hostname]) {
mutate { id => "mutate_zeek_add_field_host_name_agent_hostname"
add_field => { "[host][name]" => "%{[agent][hostname]}" } }
}
# rename the zeek child array to match the log type
mutate { id => "mutate_rename_zeek_log_type"
rename => { "[zeek_cols]" => "[zeek][%{[log_source]}]" } }
# move "up" some fields that are considered to be "multi-log" fields (eg., they
# show up in many types of logs)
mutate {
id => "mutate_rename_zeek_common_fields"
rename => { "[zeek][%{[log_source]}][ts]" => "[zeek][ts]" }
rename => { "[zeek][%{[log_source]}][uid]" => "[zeek][uid]" }
rename => { "[zeek][%{[log_source]}][fuid]" => "[zeek][fuid]" }
rename => { "[zeek][%{[log_source]}][is_orig]" => "[network][is_orig]" }
rename => { "[zeek][%{[log_source]}][orig_h]" => "[source][ip]" }
rename => { "[zeek][%{[log_source]}][orig_p]" => "[source][port]" }
rename => { "[zeek][%{[log_source]}][orig_l2_addr]" => "[source][mac]" }
rename => { "[zeek][%{[log_source]}][resp_h]" => "[destination][ip]" }
rename => { "[zeek][%{[log_source]}][resp_p]" => "[destination][port]" }
rename => { "[zeek][%{[log_source]}][resp_l2_addr]" => "[destination][mac]" }
rename => { "[zeek][%{[log_source]}][proto]" => "[network][transport]" }
rename => { "[zeek][%{[log_source]}][service]" => "[network][protocol]" }
rename => { "[zeek][%{[log_source]}][user]" => "[related][user]" }
rename => { "[zeek][%{[log_source]}][password]" => "[related][password]" }
rename => { "[zeek][%{[log_source]}][community_id]" => "[network][community_id]" }
}
# we'll just save the "true" source and destination fields.
# see, for example, https://github.com/cisagov/icsnpp-bacnet#source-and-destination-fields
mutate { id => "mutate_remove_zeek_common_fields"
remove_field => [
"[zeek][%{[log_source]}][drop_orig_h]",
"[zeek][%{[log_source]}][drop_orig_p]",
"[zeek][%{[log_source]}][drop_resp_h]",
"[zeek][%{[log_source]}][drop_resp_p]" ] }
# create a repeatable fingerprint for document ID
fingerprint {
id => "fingerprint_zeek_event_hash"
source => [ "[event][provider]",
"[log_source]",
"[zeek][ts]",
"[network][community_id]",
"[zeek][uid]",
"[zeek][fuid]",
"[log][offset]" ]
concatenate_sources => true
# uses event.hash
ecs_compatibility => "v8"
method => "MURMUR3_128"
base64encode => true
}
if ("_jsonparsesuccess" not in [tags]) {
mutate { id => "mutate_split_zeek_commas_post_parse"
split => { "[source][mac]" => ","
"[destination][mac]" => ","
"[zeek][fuid]" => ","
"[related][user]" => ","
"[network][protocol]" => "," } }
}
if ([zeek][uid]) {
# set zeek connection UID as "rootId" (see logstash.conf output section)
if (![rootId]) { mutate { id => "mutate_add_field_zeek_rootId"
add_field => { "[rootId]" => "%{[zeek][uid]}" } } }
# ECS - zeek.uid -> event.id
mutate { id => "mutate_add_field_ecs_id_uid"
merge => { "[event][id]" => "[zeek][uid]" } }
}
if ([zeek][ts]) {
if ([zeek][ts] == "0.000000") {
# missing packet timestamp, set to "now." not sure what a better option would be
ruby {
id => "ruby_zeek_empty_timestamp_set"
init => "require 'time'"
code => "event.set('[zeek][ts]', Time.now.to_f)"
}
mutate { id => "tag_zeek_empty_timestamp_set"
add_tag => [ "_missing_timestamp" ] }
}
# set firstPacket to timestamp, lastPacket to timestamp + duration
# timestamp, firstPacket, lastPacket are UNIX epoch milliseconds
ruby {
id => "ruby_zeek_timestamp_calc"
init => "require 'time'"
code => "msTime = (1000*event.get('[zeek][ts]').to_f).round(0)
event.set('[timestamp]', msTime)
event.set('[@timestamp]', LogStash::Timestamp.at(Time.strptime(msTime.to_s, '%Q')))
event.set('[firstPacket]', msTime)"
}
if ([zeek][conn]) and ([zeek][conn][duration]) {
# convert duration (floating-point seconds) to milliseconds
ruby {
id => "ruby_zeek_duration_calc"
code => "event.set('[length]', (1000*event.get('[zeek][conn][duration]').to_f).round(0))
event.set('[lastPacket]', event.get('[timestamp]').to_i + event.get('[length]').to_i)"
}
# ECS - zeek.conn.duration -> event.duration
ruby {
id => "ruby_zeek_duration_to_ecs_event_duration"
code => "event.set('[event][duration]', (1000000000 * event.get('[zeek][conn][duration]').to_f).round(0))"
}
} else {
mutate { id => "mutate_add_field_zeek_lastPacket"
add_field => { "[lastPacket]" => "%{timestamp}" } }
mutate { id => "mutate_add_field_zeek_length"
add_field => { "[length]" => "0" } }
}
# set the ts back as something more readable
mutate { id => "mutate_replace_zeek_ts"
replace => { "[zeek][ts]" => "%{[@timestamp]}" } }
} # if ([zeek][ts])
# set user and transport- and application-level protocols if specified
if ([network][transport]) {
if (![ipProtocol]) {
translate {
id => "translate_zeek_proto"
source => "[network][transport]"
target => "[ipProtocol]"
dictionary_path => "/etc/ip_protocol_name_to_number.yaml"
}
}
if ("_jsonparsesuccess" not in [tags]) {
mutate { id => "mutate_split_zeek_proto"
split => { "[network][transport]" => "," } }
}
mutate { id => "mutate_merge_zeek_proto"
merge => { "[protocol]" => "[network][transport]" } }
}
if ([log_source] == "conn") {
#############################################################################################################################
# conn.log specific logic
translate {
id => "translate_zeek_conn_state"
source => "[zeek][conn][conn_state]"
target => "[zeek][conn][conn_state_description]"
dictionary_path => "/etc/conn_states.yaml"
# TODO: can we normalize this with suricata.flow.state somewhere?
}
if ([zeek][conn][vlan] or [zeek][conn][inner_vlan]) {
# ECS - zeek.conn.vlan -> network.vlan.id
if ([zeek][conn][vlan]) {
mutate { id => "mutate_merge_zeek_conn_vlan"
merge => { "[network][vlan][id]" => "[zeek][conn][vlan]" } }
}
if ([zeek][conn][inner_vlan]) {
# ECS - zeek.conn.inner_vlan -> network.inner.vlan.id
mutate { id => "mutate_merge_zeek_conn_inner_vlan"
merge => { "[network][inner][vlan][id]" => "[zeek][conn][inner_vlan]" } }
}
}
# rename conn.log's TCP JA4 fields to what Arkime uses
if ([zeek][conn][ja4l]) {
mutate { id => "mutate_merge_zeek_tcp_ja4l"
merge => { "[tcp][ja4l]" => "[zeek][conn][ja4l]" } }
}
if ([zeek][conn][ja4ls]) {
mutate { id => "mutate_merge_zeek_tcp_ja4ls"
merge => { "[tcp][ja4ls]" => "[zeek][conn][ja4ls]" } }
}
if ([zeek][conn][ja4t]) {
mutate { id => "mutate_merge_zeek_tcp_ja4t"
merge => { "[tcp][ja4t]" => "[zeek][conn][ja4t]" } }
}
if ([zeek][conn][ja4ts]) {
mutate { id => "mutate_merge_zeek_tcp_ja4ts"
merge => { "[tcp][ja4ts]" => "[zeek][conn][ja4ts]" } }
}
# aggregate total bytes and packets
ruby {
id => "ruby_zeek_bytes_and_packets_calc"
code => "event.set('[totDataBytes]', event.get('[client][bytes]').to_i + event.get('[server][bytes]').to_i)
event.set('[network][bytes]', event.get('[source][bytes]').to_i + event.get('[destination][bytes]').to_i)
event.set('[network][packets]', event.get('[source][packets]').to_i + event.get('[destination][packets]').to_i)"
}
if ([zeek][conn][history]) {
ruby {
id => "ruby_zeek_conn_history"
# see https://www.zeek.org/sphinx/scripts/base/protocols/conn/main.bro.html#type-Conn::Info
code => "historyStr = event.get('[zeek][conn][history]').upcase
sCnt = [historyStr.count('S'), 19].min
hCnt = [historyStr.count('H'), 19].min
aCnt = [historyStr.count('A'), 19].min
fCnt = [historyStr.count('F'), 19].min
rCnt = [historyStr.count('R'), 19].min
event.set('[tcpflags][syn]', 10**(sCnt-1)) if sCnt > 0
event.set('[tcpflags][syn-ack]', 10**(hCnt-1)) if hCnt > 0
event.set('[tcpflags][ack]', 10**(aCnt-1)) if aCnt > 0
event.set('[tcpflags][fin]', 10**(fCnt-1)) if fCnt > 0
event.set('[tcpflags][rst]', 10**(rCnt-1)) if rCnt > 0"
}
}
} else if ([log_source] =~ /^bacnet/) {
if ([log_source] == "bacnet_discovery") {
#############################################################################################################################
# bacnet_discovery.log specific logic
# bacnet_discovery.range can be split into a min/max (All, 12345-12350, etc.)
if ([zeek][bacnet_discovery][range]) {
if ([zeek][bacnet_discovery][range] == "All") {
mutate { id => "mutate_add_field_zeek_bacnet_discovery_range_low"
add_field => { "[zeek][bacnet_discovery][range_low]" => "0" } }
mutate { id => "mutate_add_field_zeek_bacnet_discovery_range_high"
add_field => { "[zeek][bacnet_discovery][range_high]" => "4194300" } }
} else if ([zeek][bacnet_discovery][range] =~ /^\d+-\d+$/) {
ruby {
id => "ruby_bacnet_discovery_range_split"
code => "
if (bacnetRange = event.get('[zeek][bacnet_discovery][range]').split('-')) and (bacnetRange.length == 2) then
event.set('[zeek][bacnet_discovery][range_low]', bacnetRange[0])
event.set('[zeek][bacnet_discovery][range_high]', bacnetRange[1])
end"
}
}
}
}
mutate {
id => "mutate_rename_bacnet_fields"
rename => { "[zeek][bacnet_device_control][invoke_id]" => "[zeek][bacnet][invoke_id]" }
rename => { "[zeek][bacnet_property][invoke_id]" => "[zeek][bacnet][invoke_id]" }
rename => { "[zeek][bacnet_discovery][instance_number]" => "[zeek][bacnet][instance_number]" }
rename => { "[zeek][bacnet_property][instance_number]" => "[zeek][bacnet][instance_number]" }
rename => { "[zeek][bacnet_device_control][pdu_service]" => "[zeek][bacnet][pdu_service]" }
rename => { "[zeek][bacnet_discovery][pdu_service]" => "[zeek][bacnet][pdu_service]" }
rename => { "[zeek][bacnet_property][pdu_service]" => "[zeek][bacnet][pdu_service]" }
}
} else if ([log_source] == "bsap_ip_rdb") {
#############################################################################################################################
# bsap_ip_rdb.log specific logic
ruby {
id => "ruby_bsap_ip_rdb_variables"
init => "@bsap_ip_rdb_fields = [ :var, :val ]"
code => "
vars = event.get('[zeek][bsap_ip_rdb][variables]')
values = event.get('[zeek][bsap_ip_rdb][variable_value]')
if !vars.is_a?(Array) then
vars = vars.to_s.split(',')
end
if !values.is_a?(Array) then
values = values.to_s.split(',')
end
vars = vars.zip(values).map{ |x| @bsap_ip_rdb_fields.zip(x).to_h }
event.set('[zeek][bsap_ip_rdb][variables]', vars)
event.set('[zeek][bsap_ip_rdb][variable_count]', vars.length)
"
}
mutate { id => "mutate_remove_field_zeek_bsap_ip_rdb_variable_value"
remove_field => [ "[zeek][bsap_ip_rdb][variable_value]",
"[zeek][bsap_ip_rdb][data_len]" ] }
} else if ([log_source] == "bsap_serial_rdb") {
#############################################################################################################################
# bsap_serial_rdb.log specific logic
ruby {
id => "ruby_bsap_serial_rdb_variables"
init => "@bsap_serial_rdb_fields = [ :var, :val ]"
code => "
vars = event.get('[zeek][bsap_serial_rdb][variables]')
values = event.get('[zeek][bsap_serial_rdb][variable_value]')
if !vars.is_a?(Array) then
vars = vars.to_s.split(',')
end
if !values.is_a?(Array) then
values = values.to_s.split(',')
end
vars = vars.zip(values).map{ |x| @bsap_serial_rdb_fields.zip(x).to_h }
event.set('[zeek][bsap_serial_rdb][variables]', vars)
event.set('[zeek][bsap_serial_rdb][variable_count]', vars.length)
"
}
mutate { id => "mutate_remove_field_zeek_bsap_serial_rdb_variable_value"
remove_field => [ "[zeek][bsap_serial_rdb][variable_value]",
"[zeek][bsap_serial_rdb][data_len]" ] }
} else if ([log_source] == "cip_io") {
#############################################################################################################################
# cip_io.log specific logic
if ([zeek][cip_io][packet_correlation_id]) {
mutate {
id => "mutate_rename_cip_io_packet_correlation_id"
rename => { "[zeek][cip_io][packet_correlation_id]" => "[zeek][cip][packet_correlation_id]" }
}
}
} else if ([log_source] == "cip_identity") {
#############################################################################################################################
# cip_identity.log specific logic
if ([zeek][cip_identity][packet_correlation_id]) {
mutate {
id => "mutate_rename_cip_identity_packet_correlation_id"
rename => { "[zeek][cip_identity][packet_correlation_id]" => "[zeek][cip][packet_correlation_id]" }
}
}
if ([zeek][cip_identity][socket_address]) {
# if this is a zeek_cip_identity record with socket_address, ASN/GeoIP it as well
geoip {
id => "geoip_zeek_cip_identity_socket_address"
default_database_type => "ASN"
source => "[zeek][cip_identity][socket_address]"
target => "[@metadata][zeek_cip_identity_asn]"
}
if ([@metadata][zeek_cip_identity_asn] and [@metadata][zeek_cip_identity_asn][as_org] and [@metadata][zeek_cip_identity_asn][asn]) {
# this is stupid, the %{} doesn't seem to be liked by mutate.merge
mutate { id => "mutate_add_field_zeek_cip_identity_asn"
add_field => { "[@metadata][cip_asn_str]" => "AS%{[@metadata][zeek_cip_identity_asn][asn]} %{[@metadata][zeek_cip_identity_asn][as_org]}" } }
mutate { id => "mutate_merge_zeek_cip_identity_asn"
merge => { "[zeek][cip_identity][socket_address_asn]" => "[@metadata][cip_asn_str]" } }
}
geoip {
id => "geoip_zeek_cip_identity_socket_address_geo"
source => "[zeek][cip_identity][socket_address]"
target => "[zeek][cip_identity][socket_address_geo]"
}
}
} else if ([log_source] == "dhcp") {
#############################################################################################################################
# dhcp.log specific logic
if ([source][mac]) {
mutate {
id => "mutate_add_fields_zeek_dhcp_mac"
add_field => { "[zeek][dhcp][mac]" => "%{[source][mac]}" }
}
mutate { id => "mutate_merge_zeek_dhcp_mac"
merge => { "[dhcp][mac]" => "[source][mac]" } }
}
if ([zeek][dhcp][msg_types]) {
ruby {
id => "ruby_zeek_dhcp_msg_types"
path => "/usr/share/logstash/malcolm-ruby/make_unique_array.rb"
script_params => {
"field" => "[zeek][dhcp][msg_types]"
}
}
mutate { id => "mutate_merge_zeek_dhcp_type"
merge => { "[dhcp][type]" => "[zeek][dhcp][msg_types]" } }
}
if ([zeek][dhcp][trans_id]) {
mutate { id => "mutate_merge_zeek_dhcp_id"
merge => { "[dhcp][id]" => "[zeek][dhcp][trans_id]" } }
}
if ([zeek][dhcp][host_name]) {
mutate { id => "mutate_merge_zeek_dhcp_host_name"
merge => { "[dhcp][host]" => "[zeek][dhcp][host_name]" } }
# ECS - zeek.dhcp.host_name -> client.domain
mutate { id => "mutate_add_field_ecs_client_domain_dhcp_host_name"
add_field => { "[client][domain]" => "%{[zeek][dhcp][host_name]}" } }
}
if ([zeek][dhcp][domain]) {
# ECS - zeek.dhcp.domain -> client.domain
mutate { id => "mutate_add_field_ecs_client_domain_dhcp_domain"
add_field => { "[client][domain]" => "%{[zeek][dhcp][domain]}" } }
}
if ([zeek][dhcp][client_fqdn]) {
# ECS - zeek.dhcp.client_fqdn -> client.domain
mutate { id => "mutate_add_field_ecs_client_domain_dhcp_client_fqdn"
add_field => { "[client][domain]" => "%{[zeek][dhcp][client_fqdn]}" } }
}
if ([zeek][dhcp][assigned_ip]) {
mutate { id => "mutate_merge_zeek_dhcp_host"
merge => { "[dhcp][host]" => "[zeek][dhcp][assigned_ip]" } }
}
} else if ([log_source] == "dnp3") {
#############################################################################################################################
# dnp3.log specific logic
# translate IIN bitmap (least significant bit = zeek_dnp3_iin_flags[0], etc.)
# reference: https://raw.githubusercontent.com/wireshark/wireshark/master/epan/dissectors/packet-dnp.c (search IIN)
ruby {
id => "ruby_parse_dnp3_iin"
init => "@zeek_dnp3_iin_flags = [ 'Function Code not Implemented', 'Requested Objects Unknown', 'Parameters Invalid or Out of Range', 'Event Buffer Overflow', 'Operation Already Executing', 'Configuration Corrupt', 'Reserved', 'Reserved', 'Broadcast Msg Rx', 'Class 1 Data Available', 'Class 2 Data Available', 'Class 3 Data Available', 'Time Sync Required', 'Digital Outputs in Local', 'Device Trouble', 'Device Restart' ]"
code => "
iinNum = event.get('[zeek][dnp3][iin]').to_i
if (iinNum > 0) then
iinFlags = Array.new
@zeek_dnp3_iin_flags.each_with_index do |val, idx|
iinFlags.push(val) if (iinNum[idx] == 1)
end
event.set('[zeek][dnp3][iin_flags]', iinFlags)
end"
}
} else if ([log_source] == "dns") {
#############################################################################################################################
# dns.log specific logic
#
# NOTE: I discovered that there are some conflicts between ECS's DNS fields
# (https://www.elastic.co/guide/en/ecs/current/ecs-dns.html) and Arkime's
# (https://github.com/arkime/arkime/blob/70765f46f6e17b62e405d9cd82d8109030e51bd8/db/db.pl#L4369-L4431)
# that would result in some issues when opening Arkime sessions with DNS records
# (see https://github.com/cisagov/malcolm/issues/509). So I'm commenting-out some of the ECS DNS
# normalization here in favor of the Arkime fields.
# this must be done because [dns][ip] only handles IPv4 or IPv6 addresses
# but [answers] can contain hostnames as well
if ([zeek][dns][answers]) {
ruby {
id => "ruby_zeek_dns_answers_ip_extract"
# todo: adjust this regex so it at least sort of catches IPv6 as well
code => "
answers = event.get('[zeek][dns][answers]')
if answers.is_a?(Array) then
answers = answers.join(',')
end
event.set('[@metadata][answers_ip]', answers.scan(/\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b/))
"
}
# ECS - zeek.dns -> dns.answers
# ruby {
# id => "ruby_zeek_dns_answers_to_ecs"
# code => '
# event.set("[dns][answers]", [Array(event.get("[zeek][dns][answers]")), Array(event.get("[zeek][dns][TTLs]"))].transpose.map{ |d| Hash[[:data, :ttl].zip(d)] })
# '}
mutate { id => "mutate_add_field_ecs_dns_type_answer"
add_field => { "[dns][type]" => "answer" } }
}
if ([zeek][dns][query]) {
mutate { id => "mutate_merge_zeek_query"
merge => { "[dns][host]" => "[zeek][dns][query]" } }
ruby { id => "ruby_add_field_zeek_dns_opcode"
code => "event.set('[dns][opcode]', [ 'QUERY', event.get('[dns][opcode]') ].flatten.reject{ |e| e.nil? || e&.empty? })" }
}
if ([@metadata][answers_ip]) {
mutate { id => "mutate_merge_zeek_dns_ip"
merge => { "[dns][ip]" => "[@metadata][answers_ip]" } }
# ECS dns.ip -> dns.resolved_ip
mutate { id => "mutate_merge_ecs_dhs_resolved_ip"
merge => { "[dns][resolved_ip]" => "[dns][ip]" } }
}
if ([zeek][dns][qclass_name]) {
mutate { id => "mutate_merge_zeek_dns_qc"
merge => { "[dns][qc]" => "[zeek][dns][qclass_name]" } }
}
if ([zeek][dns][qtype_name]) {
mutate { id => "mutate_merge_zeek_dns_qt"
merge => { "[dns][qt]" => "[zeek][dns][qtype_name]" } }
}
# dns.op_code
if ([dns][opcode]) { mutate { id => "mutate_add_field_ecs_dns_opcode"
add_field => { "[dns][op_code]" => "%{[dns][opcode]}" } } }
# dns.question.class
if ([zeek][dns][qclass_name]) { mutate { id => "mutate_add_field_ecs_dns_qclass"
add_field => { "[dns][question][class]" => "%{[zeek][dns][qclass_name]}" } } }
# dns.question.type
# if ([zeek][dns][qtype_name]) { mutate { id => "mutate_add_field_ecs_dns_qtype"
# add_field => { "[dns][question][type]" => "%{[zeek][dns][qtype_name]}" } } }
# dns.question.name and dns.type:query
if ([zeek][dns][query]) {
# mutate { id => "mutate_add_field_ecs_dns_query"
# add_field => { "[dns][question][name]" => "%{[zeek][dns][query]}" } }
if (![dns][type]) { mutate { id => "mutate_add_field_ecs_dns_type_query"
add_field => { "[dns][type]" => "query" } } }
}
if ([dns][type]) {
# dns.header_flags
if ([zeek][AA] == "T") { mutate { id => "mutate_add_field_ecs_dns_header_flag_aa"
add_field => { "[dns][header_flags]" => "AA" } } }
if ([zeek][TC] == "T") { mutate { id => "mutate_add_field_ecs_dns_header_flag_tc"
add_field => { "[dns][header_flags]" => "TC" } } }
if ([zeek][RD] == "T") { mutate { id => "mutate_add_field_ecs_dns_header_flag_rd"
add_field => { "[dns][header_flags]" => "RD" } } }
if ([zeek][RA] == "T") { mutate { id => "mutate_add_field_ecs_dns_header_flag_ra"
add_field => { "[dns][header_flags]" => "RA" } } }
}
# dns.response_code
# if ([zeek][dns][rcode_name]) { mutate { id => "mutate_add_field_ecs_dns_response_code"
# add_field => { "[dns][response_code]" => "%{[zeek][dns][rcode_name]}" } } }
# dns.id
# if ([zeek][dns][trans_id]) { mutate { id => "mutate_add_field_ecs_dns_id"
# add_field => { "[dns][id]" => "%{[zeek][dns][trans_id]}" } } }
# TODO: domain stuff (dns.question.registered_domain, dns.question.subdomain, dns.question.top_level_domain)
# perhaps use something like https://github.com/plutonbacon/logstash-filter-publicsuffix
} else if ([log_source] == "enip") {
#############################################################################################################################
# enip.log specific logic
if ([zeek][enip][packet_correlation_id]) {
mutate {
id => "mutate_rename_enip_packet_correlation_id"
rename => { "[zeek][enip][packet_correlation_id]" => "[zeek][cip][packet_correlation_id]" }
}
}
} else if ([log_source] == "files") {
#############################################################################################################################
# files.log specific logic
# translate Zeek's double-backslashes single backslash in filenames
ruby {
id => "ruby_zeek_files_filename_dedoubleslash"
path => "/usr/share/logstash/malcolm-ruby/dedoubleslash.rb"
script_params => {
"source" => "[zeek][files][filename]"
"target" => "[zeek][files][filename]"
}
}
if ([zeek][files][total_bytes]) {
ruby {
id => "ruby_zeek_files_totBytes"
code => "event.set('[network][bytes]', event.get('[zeek][files][total_bytes]').to_i)"
}
}
if ([zeek][files][seen_bytes]) {
ruby {
id => "ruby_zeek_files_totDataBytes"
code => "event.set('[totDataBytes]', event.get('[zeek][files][seen_bytes]').to_i)"
}
}
if ([zeek][files][source]) {
# do some normalization on files source
mutate { id => "mutate_gsub_field_zeek_files_source_spicy_suffix"
gsub => [ "[zeek][files][source]", "_(TCP|UDP|DATA)$", "" ] }
mutate { id => "mutate_gsub_field_zeek_files_source_spicy_prefix"
gsub => [ "[zeek][files][source]", "^SPICY_", "" ] }
if ([zeek][files][source] =~ /^XOR decrypted from /) {
# PE_XOR plugin writes source as "XOR decrypted from FM7Tr545kxt3ofR7x2-"..., let's
# standardize that to just "XOR decrypted" and put the source fuid in parent_fuid
grok {
id => "grok_zeek_files_source_xor"
match => { "[zeek][files][source]" => [ "decrypted%{SPACE}from%{SPACE}%{WORD:[@metadata][source_xor_fuid]}" ] }
}
if ([@metadata][source_xor_fuid]) { mutate { id => "mutate_merge_zeek_files_source_xor_parent_fuid"
merge => { "[zeek][files][parent_fuid]" => "[@metadata][source_xor_fuid]" } } }
mutate { id => "mutate_replace_zeek_files_source_xor"
replace => { "[zeek][files][source]" => "XOR decrypted" } }
} else if ([zeek][files][source] == "SSL") {
# SSL->TLS to match up with what the service field has for cross-referencing
mutate { id => "mutate_replace_zeek_files_source_ssl_to_tls"
replace => { "[zeek][files][source]" => "TLS" } }
}
}
# ECS - "file" -> file.type
mutate { id => "mutate_add_field_ecs_file_type"
add_field => { "[file][type]" => "file" } }
# ECS -> zeek_files.total_bytes -> file.size
if ([zeek][files][total_bytes]) { mutate { id => "mutate_add_field_ecs_files_size"
add_field => { "[file][size]" => "%{[zeek][files][total_bytes]}" } } }
# ECS -> zeek_files.(md5|sha1|sha256) -> file.hash.(md5|sha1|sha256)
if ([zeek][files][md5]) { mutate { id => "mutate_add_field_ecs_files_hash_md5"
add_field => { "[file][hash][md5]" => "%{[zeek][files][md5]}" } } }
if ([zeek][files][sha1]) { mutate { id => "mutate_add_field_ecs_files_hash_sha1"
add_field => { "[file][hash][sha1]" => "%{[zeek][files][sha1]}" } } }
if ([zeek][files][sha256]) { mutate { id => "mutate_add_field_ecs_files_hash_sha256"
add_field => { "[file][hash][sha256]" => "%{[zeek][files][sha256]}" } } }
if ([zeek][files][extracted]) {
ruby {
id => "ruby_zeek_files_extracted_uri_build"
code => "
uri = nil
if (fName = event.get('[zeek][files][extracted]')) then
if (tags = event.get('[tags]')) && tags.include?('_filebeat_zeek_hedgehog_live') then
if (hName = event.get('[host][name]')) then
uri = 'hh-extracted-files/' + hName + '/' + fName
end
else
uri = 'extracted-files/' + fName
end
end
event.set('[zeek][files][extracted_uri]', uri) unless uri.nil? or (uri.length == 0)
"
}
}
} else if ([log_source] == "ftp") {
#############################################################################################################################
# ftp.log specific logic
if ([zeek][ftp][file_size]) {
ruby {
id => "ruby_zeek_ftp_totDataBytes"
code => "event.set('[totDataBytes]', event.get('[zeek][ftp][file_size]').to_i)"
}
}
} else if ([log_source] == "ge_srtp") {
#############################################################################################################################
# ge_srtp_general.log specific logic
if ([zeek][ge_srtp][io_fault_entry_last_read]) {
translate {
id => "translate_zeek_ge_srtp_io_fault_entry_last_read"
source => "[zeek][ge_srtp][io_fault_entry_last_read]"
target => "[zeek][ge_srtp][io_fault_entry_last_read]"
dictionary => {
"I/O fault table has changed since last read by this device" => true
"I/O fault table unchanged since last read" => false
}
}
}
if ([zeek][ge_srtp][io_fault_entry_present]) {
translate {
id => "translate_zeek_ge_srtp_io_fault_entry_present"
source => "[zeek][ge_srtp][io_fault_entry_present]"
target => "[zeek][ge_srtp][io_fault_entry_present]"
dictionary => {
"One or more fault entries in I/O fault table" => true
"I/O fault table is empty" => false
}
}
}
if ([zeek][ge_srtp][front_panel_run_switch]) {
translate {
id => "translate_zeek_ge_srtp_front_panel_run_switch"
source => "[zeek][ge_srtp][front_panel_run_switch]"
target => "[zeek][ge_srtp][front_panel_run_switch]"
dictionary => {
"RUN" => true
"STOP" => false
}
}
}
if ([zeek][ge_srtp][constant_sweep_mode]) {
translate {
id => "translate_zeek_ge_srtp_constant_sweep_mode"
source => "[zeek][ge_srtp][constant_sweep_mode]"
target => "[zeek][ge_srtp][constant_sweep_mode]"
dictionary => {
"Constant sweep mode active" => true
"Constant sweep mode is not active" => false
}
}
}
if ([zeek][ge_srtp][oem_protected]) {
translate {
id => "translate_zeek_ge_srtp_oem_protected"
source => "[zeek][ge_srtp][oem_protected]"
target => "[zeek][ge_srtp][oem_protected]"
dictionary => {
"OEM protection in effect" => true
"No OEM protection" => false
}
}
}
if ([zeek][ge_srtp][oversweep_flag]) {
translate {
id => "translate_zeek_ge_srtp_oversweep_flag"
source => "[zeek][ge_srtp][oversweep_flag]"
target => "[zeek][ge_srtp][oversweep_flag]"
dictionary => {
"Constant sweep value exceeded" => true
"No oversweep condition exists" => false
}
}
}
if ([zeek][ge_srtp][front_panel_enable_switch]) {
translate {
id => "translate_zeek_ge_srtp_front_panel_enable_switch"
source => "[zeek][ge_srtp][front_panel_enable_switch]"
target => "[zeek][ge_srtp][front_panel_enable_switch]"
dictionary => {
"Outputs disabled" => false
"Outputs enabled" => true
}
}
}
if ([zeek][ge_srtp][plc_fault_entry_present]) {
translate {
id => "translate_zeek_ge_srtp_plc_fault_entry_present"
source => "[zeek][ge_srtp][plc_fault_entry_present]"
target => "[zeek][ge_srtp][plc_fault_entry_present]"
dictionary => {
"One or more fault entries in PLC fault table" => true
"PLC fault table is empty" => false
}
}
}
if ([zeek][ge_srtp][plc_fault_entry_last_read]) {
translate {
id => "translate_zeek_ge_srtp_plc_fault_entry_last_read"
source => "[zeek][ge_srtp][plc_fault_entry_last_read]"
target => "[zeek][ge_srtp][plc_fault_entry_last_read]"
dictionary => {
"PLC fault table has changed since last read by this device" => true
"PLC fault table unchanged since last read" => false
}
}
}
if ([zeek][ge_srtp][programmer_attachment]) {
translate {
id => "translate_zeek_ge_srtp_programmer_attachment"
source => "[zeek][ge_srtp][programmer_attachment]"
target => "[zeek][ge_srtp][programmer_attachment]"
dictionary => {
"Programmer attachment found" => true
"No programmer attachment found" => false
}
}
}
} else if ([log_source] == "genisys") {
#############################################################################################################################
# genisys.log specific logic
ruby {
id => "ruby_genisys_payload"
init => "@genisys_fields = [ :address, :data ]"
code => "
vars = event.get('[zeek][genisys][payload_raw]')
if !vars.is_a?(Array) then
vars = vars.to_s.split(',')
end
vars = vars.map{ |x| x.split('=') }.map{ |x| @genisys_fields.zip(x).to_h }
event.set('[zeek][genisys][payload]', vars) unless vars.nil? or (vars.length == 0)
"
}
mutate { id => "mutate_remove_genisys_payload_raw"
remove_field => [ "[zeek][genisys][payload_raw]" ] }
} else if ([log_source] == "gquic") {
#############################################################################################################################
# gquic.log specific logic
if ([zeek][gquic][user_agent]) {
mutate { id => "mutate_merge_zeek_quic_useragent"
merge => { "[quic][useragent]" => "[zeek][gquic][user_agent]" } }
}
if ([zeek][gquic][server_name]) {
mutate { id => "mutate_merge_zeek_quic_host"
merge => { "[quic][host]" => "[zeek][gquic][server_name]" } }
}
if ([zeek][gquic][version]) {
ruby {
id => "ruby_zeek_set_quic_version"
code => "event.set('[quic][version]', 'Q' + event.get('[zeek][gquic][version]').to_s.rjust(3, '0'))"
}
}
} else if ([log_source] == "http") {
#############################################################################################################################
# http.log specific logic
# translate Zeek's double-backslashes single backslash in filenames
ruby {
id => "ruby_zeek_http_orig_filenames_dedoubleslash"
path => "/usr/share/logstash/malcolm-ruby/dedoubleslash.rb"
script_params => {
"source" => "[zeek][http][orig_filenames]"
"target" => "[zeek][http][orig_filenames]"
}
}
ruby {
id => "ruby_zeek_http_resp_filenames_dedoubleslash"
path => "/usr/share/logstash/malcolm-ruby/dedoubleslash.rb"
script_params => {
"source" => "[zeek][http][resp_filenames]"
"target" => "[zeek][http][resp_filenames]"
}
}
if ([zeek][http][tags]) {
# merge zeek.http.tags into tags and then remove original
mutate { id => "mutate_merge_zeek_http_tags"
merge => { "[tags]" => "[zeek][http][tags]" } }
mutate { id => "mutate_remove_field_zeek_http_tags"
remove_field => [ "[zeek][http][tags]" ] }
}
if ([zeek][http][host]) {
mutate { id => "mutate_merge_zeek_http_host"
merge => { "[http][host]" => "[zeek][http][host]" } }
}
if ([zeek][http][uri]) {
if ([zeek][http][host]) {
mutate { id => "mutate_add_field_metadata_http_host_and_uri"
add_field => { "[@metadata][http_uri]" => "%{[zeek][http][host]}%{[zeek][http][uri]}" } }
mutate { id => "mutate_merge_zeek_http_host_and_uri"
merge => { "[http][uri]" => "[@metadata][http_uri]" } }
} else {
mutate { id => "mutate_merge_zeek_http_uri"
merge => { "[http][uri]" => "[zeek][http][uri]" } }
}
} else if ([zeek][http][referrer]) {
mutate { id => "mutate_merge_zeek_http_referrer"
merge => { "[http][uri]" => "[zeek][http][referrer]" } }
}
if ([zeek][http][user_agent]) {
mutate { id => "mutate_merge_zeek_http_user_agent"
merge => { "[http][useragent]" => "[zeek][http][user_agent]" } }
}
if ([zeek][http][orig_mime_types]) {
mutate { id => "mutate_merge_zeek_http_orig_mime_types"
merge => { "[http][bodyMagic]" => "[zeek][http][orig_mime_types]" } }
# ECS - zeek.http.orig_mime_types -> http.request.mime_type
mutate { id => "mutate_merge_ecs_http_request_mime_type"
merge => { "[http][request][mime_type]" => "[zeek][http][orig_mime_types]" } }
}
if ([zeek][http][resp_mime_types]) {
mutate { id => "mutate_merge_zeek_http_resp_mime_types"
merge => { "[http][bodyMagic]" => "[zeek][http][resp_mime_types]" } }
# ECS - zeek.http.resp_mime_types -> http.response.mime_type
mutate { id => "mutate_merge_ecs_http_response_mime_type"
merge => { "[http][response][mime_type]" => "[zeek][http][resp_mime_types]" } }
}
if ([zeek][http][version]) {
mutate { id => "mutate_merge_zeek_http_clientVersion"
merge => { "[http][clientVersion]" => "[zeek][http][version]" } }
}
if ([zeek][http][status_code]) {
mutate { id => "mutate_merge_zeek_http_statuscode"
merge => { "[http][statuscode]" => "[zeek][http][status_code]" } }
}
if ([zeek][http][method]) {
mutate { id => "mutate_merge_zeek_http_method"
merge => { "[http][method]" => "[zeek][http][method]" } }
}
# There is no good ECS equivalent for this field so it will map to Arkime's field name only
if ([zeek][http][ja4h]) {
mutate { id => "mutate_merge_zeek_http_ja4h"
merge => { "[http][ja4h]" => "[zeek][http][ja4h]" } }
}
if ([zeek][http][post_username]) {
mutate { id => "mutate_merge_zeek_http_post_username_1"
merge => { "[related][user]" => "[zeek][http][post_username]" } }
mutate { id => "mutate_merge_zeek_http_post_username_2"
merge => { "[user]" => "[zeek][http][post_username]" } }
}
if (![related][password]) and ([zeek][http][post_password_plain]) {
mutate { id => "mutate_add_field_zeek_http_post_password_plain"
add_field => { "[related][password]" => "%{[zeek][http][post_password_plain]}" } }
}
if ([zeek][http][response_body_len]) { mutate { id => "mutate_add_field_zeek_http_server_bytes"
add_field => { "[server][bytes]" => "%{[zeek][http][response_body_len]}" } } }
if ([zeek][http][request_body_len]) { mutate { id => "mutate_add_field_zeek_http_client_bytes"
add_field => { "[client][bytes]" => "%{[zeek][http][request_body_len]}" } } }
ruby {
id => "ruby_zeek_http_totDataBytes"
code => "event.set('[totDataBytes]', event.get('[zeek][http][response_body_len]').to_i + event.get('[zeek][http][request_body_len]').to_i)"
}
# ECS - zeek.http.request_body_len -> http.request.body.bytes
if ([zeek][http][request_body_len]) { mutate { id => "mutate_add_field_ecs_http_request_body_bytes"
add_field => { "[http][request][body][bytes]" => "%{[zeek][http][request_body_len]}" } } }
# ECS - zeek.http.method -> http.request.method
if ([zeek][http][method]) { mutate { id => "mutate_add_field_ecs_http_request_method"
add_field => { "[http][request][method]" => "%{[zeek][http][method]}" } } }
# ECS - zeek.http.referrer -> http.request.referrer
if ([zeek][http][referrer]) { mutate { id => "mutate_add_field_ecs_http_request_referrer"
add_field => { "[http][request][referrer]" => "%{[zeek][http][referrer]}" } } }
# ECS - zeek.http.response_body_len -> http.response.body.bytes
if ([zeek][http][response_body_len]) { mutate { id => "mutate_add_field_ecs_http_response_body_bytes"
add_field => { "[http][response][body][bytes]" => "%{[zeek][http][response_body_len]}" } } }
# ECS - zeek.http.status_code -> http.response.status_code
if ([zeek][http][status_code]) { mutate { id => "mutate_add_field_ecs_http_response_status_code"
add_field => { "[http][response][status_code]" => "%{[zeek][http][status_code]}" } } }
# ECS - zeek.http.version -> http.version
if ([zeek][http][version]) { mutate { id => "mutate_add_field_ecs_http_version"
add_field => { "[http][version]" => "%{[zeek][http][version]}" } } }
# ECS - zeek.http.host and zeek_http.uri -> url.* (https://www.elastic.co/guide/en/ecs/current/ecs-url.html)
if ([zeek][http][uri]) or ([zeek][http][host]) {
ruby {
id => "ruby_ecs_uri_parse_from_zeek_http"
init => "require 'uri'"
code => "
scheme = 'http'
user = event.get('[related][user]')
password = event.get('[related][password]')
host = event.get('[zeek][http][host]')
port = event.get('[destination][port]')
uri = event.get('[zeek][http][uri]')
ext = (uri.nil? || !(uri.include? '/')) ? nil : File.extname(uri).partition('.').last.split(/[\?#]/)[0]
fragment = uri.nil? ? nil : uri.partition('#').last
query = uri.nil? ? nil : uri.partition('?').last
event.set('[url][scheme]', scheme)
event.set('[url][original]', scheme + '://' + (host.nil? ? '' : host) + (uri.nil? ? '' : uri))
event.set('[url][full]', scheme + '://' + (user.nil? ? '' : Array(user).first) + (password.nil? ? '' : ':' + password) + ((user.nil? && password.nil?) ? '' : '@') + (host.nil? ? '' : host) + (port.nil? ? '' : ':' + port.to_s) + (uri.nil? ? '' : uri))
event.set('[url][domain]', host) unless host.nil?
event.set('[url][extension]', ext) unless ext.nil? || ext.empty?
event.set('[url][fragment]', fragment) unless fragment.nil? || fragment.empty?
event.set('[url][password]', password) unless password.nil?
event.set('[url][path]', uri) unless uri.nil?
event.set('[url][port]', port) unless port.nil?
event.set('[url][query]', query) unless query.nil? || query.empty?
event.set('[url][username]', Array(user).first) unless user.nil?
"
# TODO: ECS url domain stuff (url.registered_domain, url.top_level_domain)
# perhaps use something like https://github.com/plutonbacon/logstash-filter-publicsuffix
}
}
} else if ([log_source] == "ipsec") {
#############################################################################################################################
# ipsec.log specific logic
ruby {
id => "ruby_zeek_field_ipsec_flags"
code => '
flags = Array.new
if (event.get("[zeek][ipsec][flag_e]") == "T") then
flags << "E"
end
if (event.get("[zeek][ipsec][flag_c]") == "T") then
flags << "C"
end
if (event.get("[zeek][ipsec][flag_a]") == "T") then
flags << "A"