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Cisco Umbrella: Fix umbrella dns logs populating destination.ip instead of source.nat.ip #31454

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Merged
adriansr merged 1 commit into from
Apr 28, 2022
Merged

Cisco Umbrella: Fix umbrella dns logs populating destination.ip instead of source.nat.ip #31454

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1 change: 1 addition & 0 deletions CHANGELOG.next.asciidoc
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...main[Check the HEAD dif
- Netflow: replace invalid field value. {pull}31295[31295]
- google_workspace: Fix pagination to prevent skipped events when more than one page is present. {pull}31372[31372]
- sophos.xg: Update module to handle new log fields. {issue}31038[31038] {pull}31388[31388]
- cisco: Fix umbrella dns logs populating destination.ip instead of source.nat.ip. {pull}31454[31454]

*Heartbeat*

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40 changes: 31 additions & 9 deletions x-pack/filebeat/module/cisco/umbrella/ingest/pipeline.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ processors:
- source.user.name
- cisco.umbrella.identities
- source.address
- destination.address
- source.nat.ip
- cisco.umbrella.action
- dns.question.type
- dns.response_code
Expand Down Expand Up @@ -192,16 +192,38 @@ processors:
if: ctx?.cisco?.umbrella?.action != null

# Converting address fields to either ip or domain
- grok:
- convert:
field: source.address
patterns:
- "(?:%{IP:source.ip}|%{GREEDYDATA:source.domain})"
ignore_failure: true
- grok:
target_field: source.ip
type: ip
ignore_missing: true
on_failure:
- set:
copy_from: source.address
field: source.domain
override: true

- convert:
field: destination.address
patterns:
- "(?:%{IP:destination.ip}|%{GREEDYDATA:destination.domain})"
ignore_failure: true
target_field: destination.ip
type: ip
ignore_missing: true
on_failure:
- set:
field: destination.domain
copy_from: destination.address
override: true

# For nat, there's no address or domain subfield.
# If the value is not a valid IP, it must be removed
# or ingestion will fail. Probably just an empty value.
- convert:
field: source.nat.ip
type: ip
ignore_missing: true
on_failure:
- remove:
field: source.nat.ip

- community_id:
ignore_missing: true
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4 changes: 2 additions & 2 deletions x-pack/filebeat/module/cisco/umbrella/test/umbrella-dnslogs.log
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@@ -1,3 +1,3 @@
"2020-07-23 23:49:54","elasticuser","elasticuser2","some other identity","192.168.1.1","175.16.199.1","Allowed","1 (A)","NOERROR","elastic.co.","Software/Technology,Business Services,Application","Test Policy Name","SomeIdentityType",""
"2020-07-23 23:50:25","elasticuser","elasticuser2","some other identity","192.168.1.1","4.4.4.4","Blocked","1 (A)","NOERROR","elastic.co/something.","Chat,Instant Messaging,Block List,Application","Test Policy Name","SomeIdentityType","BlockedCategories"
"2020-07-23 23:49:54","elasticuser","elasticuser2,some other identity","192.168.1.1","175.16.199.1","Allowed","1 (A)","NOERROR","elastic.co.","Software/Technology,Business Services,Application","Test Policy Name","SomeIdentityType",""
"2020-07-23 23:50:25","elasticuser","elasticuser2,some other identity","192.168.1.1","4.4.4.4","Blocked","1 (A)","NOERROR","elastic.co/something.","Chat,Instant Messaging,Block List,Application","Test Policy Name","SomeIdentityType","BlockedCategories"
"2021-05-14 19:39:58","elastic_machine","elastic_machine,Elastic User (ElasticUser@elastic.co)","89.160.20.156","2.2.2.2","Allowed","1 (A)","NOERROR","elastic.co.","Infrastructure","Roaming Computers","Roaming Computers,AD Users",""
80 changes: 40 additions & 40 deletions x-pack/filebeat/module/cisco/umbrella/test/umbrella-dnslogs.log-expected.json
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@@ -1,92 +1,93 @@
[
{
"@timestamp": "2020-07-23T23:49:54.000Z",
"cisco.umbrella.blocked_categories": "SomeIdentityType",
"cisco.umbrella.categories": "elastic.co.",
"cisco.umbrella.categories": "Software/Technology,Business Services,Application",
"cisco.umbrella.identities": [
"elasticuser2"
"elasticuser2",
"some other identity"
],
"cisco.umbrella.identity_types": "Test Policy Name",
"cisco.umbrella.policy_identity_type": "Software/Technology,Business Services,Application",
"destination.address": "192.168.1.1",
"destination.domain": "NOERROR",
"destination.ip": "192.168.1.1",
"dns.question.type": "Allowed",
"dns.response_code": "1 (A)",
"cisco.umbrella.identity_types": "SomeIdentityType",
"cisco.umbrella.policy_identity_type": "Test Policy Name",
"destination.domain": "elastic.co.",
"dns.question.type": "1 (A)",
"dns.response_code": "NOERROR",
"dns.type": "query",
"event.action": "dns-request-175.16.199.1",
"event.action": "dns-request-Allowed",
"event.category": "network",
"event.dataset": "cisco.umbrella",
"event.module": "cisco",
"event.original": "\\\"2020-07-23 23:49:54\\\",\\\"elasticuser\\\",\\\"elasticuser2\\\",\\\"some other identity\\\",\\\"192.168.1.1\\\",\\\"175.16.199.1\\\",\\\"Allowed\\\",\\\"1 (A)\\\",\\\"NOERROR\\\",\\\"elastic.co.\\\",\\\"Software/Technology,Business Services,Application\\\",\\\"Test Policy Name\\\",\\\"SomeIdentityType\\\",\\\"\\\"",
"event.original": "\\\"2020-07-23 23:49:54\\\",\\\"elasticuser\\\",\\\"elasticuser2,some other identity\\\",\\\"192.168.1.1\\\",\\\"175.16.199.1\\\",\\\"Allowed\\\",\\\"1 (A)\\\",\\\"NOERROR\\\",\\\"elastic.co.\\\",\\\"Software/Technology,Business Services,Application\\\",\\\"Test Policy Name\\\",\\\"SomeIdentityType\\\",\\\"\\\"",
"event.type": [
"allowed",
"connection"
],
"fileset.name": "umbrella",
"input.type": "log",
"log.offset": 0,
"message": "\"2020-07-23 23:49:54\",\"elasticuser\",\"elasticuser2\",\"some other identity\",\"192.168.1.1\",\"175.16.199.1\",\"Allowed\",\"1 (A)\",\"NOERROR\",\"elastic.co.\",\"Software/Technology,Business Services,Application\",\"Test Policy Name\",\"SomeIdentityType\",\"\"",
"message": "\"2020-07-23 23:49:54\",\"elasticuser\",\"elasticuser2,some other identity\",\"192.168.1.1\",\"175.16.199.1\",\"Allowed\",\"1 (A)\",\"NOERROR\",\"elastic.co.\",\"Software/Technology,Business Services,Application\",\"Test Policy Name\",\"SomeIdentityType\",\"\"",
"observer.product": "Umbrella",
"observer.type": "dns",
"observer.vendor": "Cisco",
"related.hosts": [
"NOERROR",
"some other identity"
"elastic.co."
],
"related.ip": [
"175.16.199.1",
"192.168.1.1"
],
"related.user": [
"elasticuser"
],
"service.type": "cisco",
"source.address": "some other identity",
"source.domain": "some other identity",
"source.address": "192.168.1.1",
"source.ip": "192.168.1.1",
"source.nat.ip": "175.16.199.1",
"source.user.name": "elasticuser"
},
{
"@timestamp": "2020-07-23T23:50:25.000Z",
"cisco.umbrella.blocked_categories": "SomeIdentityType",
"cisco.umbrella.categories": "elastic.co/something.",
"cisco.umbrella.blocked_categories": "BlockedCategories",
"cisco.umbrella.categories": "Chat,Instant Messaging,Block List,Application",
"cisco.umbrella.identities": [
"elasticuser2"
"elasticuser2",
"some other identity"
],
"cisco.umbrella.identity_types": "Test Policy Name",
"cisco.umbrella.policy_identity_type": "Chat,Instant Messaging,Block List,Application",
"destination.address": "192.168.1.1",
"destination.domain": "NOERROR",
"destination.ip": "192.168.1.1",
"dns.question.type": "Blocked",
"dns.response_code": "1 (A)",
"cisco.umbrella.identity_types": "SomeIdentityType",
"cisco.umbrella.policy_identity_type": "Test Policy Name",
"destination.domain": "elastic.co/something.",
"dns.question.type": "1 (A)",
"dns.response_code": "NOERROR",
"dns.type": "query",
"event.action": "dns-request-4.4.4.4",
"event.action": "dns-request-Blocked",
"event.category": "network",
"event.dataset": "cisco.umbrella",
"event.module": "cisco",
"event.original": "\\\"2020-07-23 23:50:25\\\",\\\"elasticuser\\\",\\\"elasticuser2\\\",\\\"some other identity\\\",\\\"192.168.1.1\\\",\\\"4.4.4.4\\\",\\\"Blocked\\\",\\\"1 (A)\\\",\\\"NOERROR\\\",\\\"elastic.co/something.\\\",\\\"Chat,Instant Messaging,Block List,Application\\\",\\\"Test Policy Name\\\",\\\"SomeIdentityType\\\",\\\"BlockedCategories\\\"",
"event.original": "\\\"2020-07-23 23:50:25\\\",\\\"elasticuser\\\",\\\"elasticuser2,some other identity\\\",\\\"192.168.1.1\\\",\\\"4.4.4.4\\\",\\\"Blocked\\\",\\\"1 (A)\\\",\\\"NOERROR\\\",\\\"elastic.co/something.\\\",\\\"Chat,Instant Messaging,Block List,Application\\\",\\\"Test Policy Name\\\",\\\"SomeIdentityType\\\",\\\"BlockedCategories\\\"",
"event.type": [
"connection"
"connection",
"denied"
],
"fileset.name": "umbrella",
"input.type": "log",
"log.offset": 237,
"message": "\"2020-07-23 23:50:25\",\"elasticuser\",\"elasticuser2\",\"some other identity\",\"192.168.1.1\",\"4.4.4.4\",\"Blocked\",\"1 (A)\",\"NOERROR\",\"elastic.co/something.\",\"Chat,Instant Messaging,Block List,Application\",\"Test Policy Name\",\"SomeIdentityType\",\"BlockedCategories\"",
"log.offset": 235,
"message": "\"2020-07-23 23:50:25\",\"elasticuser\",\"elasticuser2,some other identity\",\"192.168.1.1\",\"4.4.4.4\",\"Blocked\",\"1 (A)\",\"NOERROR\",\"elastic.co/something.\",\"Chat,Instant Messaging,Block List,Application\",\"Test Policy Name\",\"SomeIdentityType\",\"BlockedCategories\"",
"observer.product": "Umbrella",
"observer.type": "dns",
"observer.vendor": "Cisco",
"related.hosts": [
"NOERROR",
"some other identity"
"elastic.co/something."
],
"related.ip": [
"192.168.1.1"
"192.168.1.1",
"4.4.4.4"
],
"related.user": [
"elasticuser"
],
"service.type": "cisco",
"source.address": "some other identity",
"source.domain": "some other identity",
"source.address": "192.168.1.1",
"source.ip": "192.168.1.1",
"source.nat.ip": "4.4.4.4",
"source.user.name": "elasticuser"
},
{
Expand All @@ -98,9 +99,7 @@
],
"cisco.umbrella.identity_types": "Roaming Computers,AD Users",
"cisco.umbrella.policy_identity_type": "Roaming Computers",
"destination.address": "2.2.2.2",
"destination.domain": "elastic.co.",
"destination.ip": "2.2.2.2",
"dns.question.type": "1 (A)",
"dns.response_code": "NOERROR",
"dns.type": "query",
Expand All @@ -115,7 +114,7 @@
],
"fileset.name": "umbrella",
"input.type": "log",
"log.offset": 492,
"log.offset": 488,
"message": "\"2021-05-14 19:39:58\",\"elastic_machine\",\"elastic_machine,Elastic User (ElasticUser@elastic.co)\",\"89.160.20.156\",\"2.2.2.2\",\"Allowed\",\"1 (A)\",\"NOERROR\",\"elastic.co.\",\"Infrastructure\",\"Roaming Computers\",\"Roaming Computers,AD Users\",\"\"",
"observer.product": "Umbrella",
"observer.type": "dns",
Expand All @@ -134,6 +133,7 @@
"service.type": "cisco",
"source.address": "89.160.20.156",
"source.ip": "89.160.20.156",
"source.nat.ip": "2.2.2.2",
"source.user.name": "elastic_machine"
}
]