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santa: add process.entity_id constructed from agent.id, pid and pidversion #3373

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Merged
efd6 merged 3 commits into from
May 18, 2022
Merged

santa: add process.entity_id constructed from agent.id, pid and pidversion #3373

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ea990c7
santa: add process.entity_id constructed from agent.id, pid and pidve…
efd6 May 18, 2022
9c3db49
Update packages/santa/changelog.yml
efd6 May 18, 2022
47573e1
fix docs
efd6 May 18, 2022
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7 changes: 6 additions & 1 deletion packages/santa/changelog.yml
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@@ -1,8 +1,13 @@
# newer versions go on top
- version: "3.1.0"
changes:
- description: Add `process.entity_id` field.
type: enhancement
link: https://github.com/elastic/integrations/pull/1
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- version: "3.0.0"
changes:
- description: Update log format to support the GA releases of Santa. The pre-GA Santa log format (circa 2017) is no longer accepted.
type: breaking-change
type: enhancement
link: https://github.com/elastic/integrations/pull/3347
- version: "2.1.0"
changes:
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6 changes: 6 additions & 0 deletions packages/santa/data_stream/log/_dev/test/pipeline/test-santa-raw.log-expected.json
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Expand Up @@ -37,6 +37,7 @@
"xpcproxy",
"com.apple.CoreAuthentication.agent"
],
"entity_id": "71993-1097732",
"executable": "/usr/libexec/xpcproxy",
"hash": {
"sha256": "43158bf397bf52001067319c591249307e2862daf8690828c15cdcc1ddf6166d"
Expand Down Expand Up @@ -112,6 +113,7 @@
"/System/Library/PrivateFrameworks/TrustEvaluationAgent.framework/Versions/A/Resources/trustevaluationagent",
"trustevaluationagent"
],
"entity_id": "72012-1097765",
"executable": "/System/Library/PrivateFrameworks/TrustEvaluationAgent.framework/Versions/A/Resources/trustevaluationagent",
"hash": {
"sha256": "7207307ca09d2707368ec394e67c6ccff6e48a2d1d86225a3115fe3535a8237c"
Expand Down Expand Up @@ -174,6 +176,7 @@
"args": [
"/usr/libexec/syspolicyd"
],
"entity_id": "377-833",
"executable": "/usr/libexec/syspolicyd",
"name": "syspolicyd",
"parent": {
Expand Down Expand Up @@ -224,6 +227,7 @@
"args": [
"/usr/sbin/newsyslog"
],
"entity_id": "71559-1096716",
"executable": "/usr/sbin/newsyslog",
"name": "newsyslog",
"parent": {
Expand Down Expand Up @@ -274,6 +278,7 @@
"args": [
"/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Support/mds_stores"
],
"entity_id": "546-1285",
"executable": "/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Support/mds_stores",
"name": "mds_stores",
"parent": {
Expand Down Expand Up @@ -323,6 +328,7 @@
"args": [
"/sbin/launchd"
],
"entity_id": "1-521",
"executable": "/sbin/launchd",
"name": "launchd",
"parent": {
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8 changes: 8 additions & 0 deletions packages/santa/data_stream/log/elasticsearch/ingest_pipeline/default.yml
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Expand Up @@ -16,6 +16,14 @@ processors:
- '\[%{TIMESTAMP_ISO8601:timestamp}\] %{NOT_SEPARATOR:log.level} santad: action=%{NOT_SEPARATOR:santa.action}\|mount=%{NOT_SEPARATOR:santa.disk.mount}?\|volume=%{NOT_SEPARATOR:santa.disk.volume}\|bsdname=%{NOT_SEPARATOR:santa.disk.bsdname}?(\|fs=%{NOT_SEPARATOR:santa.disk.fs})?(\|model=%{NOT_SEPARATOR:santa.disk.model}?)?(\|serial=%{NOT_SEPARATOR:santa.disk.serial}?)?(\|bus=%{NOT_SEPARATOR:santa.disk.bus}?)?(\|dmgpath=%{NOT_SEPARATOR:santa.disk.dmgpath}?)?(\|appearance=%{TIMESTAMP_ISO8601:santa.disk.appearance})?'
pattern_definitions:
NOT_SEPARATOR: '[^\|]+'
- set:
field: process.entity_id
value: "{{{process.pid}}}-{{{santa.pidversion}}}"
if: "ctx.process?.pid != null && ctx.santa?.pidversion != null"
- set:
field: process.entity_id
value: "{{{agent.id}}}-{{{process.entity_id}}}"
if: "ctx.agent?.id != null && ctx.process?.entity_id != null"
Comment on lines +23 to +26

@r00tu53r r00tu53r May 18, 2022

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I am not sure who would set process.entity_id before ? Would this condition ever be true ?

@efd6 efd6 May 18, 2022 •
edited
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The previous set processor may have. This part prepends the agent.id if it's available and needed (the null check is for the "if needed" part of that).

@r00tu53r r00tu53r May 18, 2022

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eeks missed it :) This enriches the existing field.

Isn't it worth having agent.id which I presume is almost always available for cases where process.pid and santa.pidversion are unavailable. That way there is at least one other identifying factor ? But none the less the user could always user agent.id directly I suppose. 👍

@efd6 efd6 May 18, 2022

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Yes, that will be available independently.

- date:
field: process.start
target_field: process.start
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4 changes: 4 additions & 0 deletions packages/santa/data_stream/log/fields/ecs.yml
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Expand Up @@ -2,6 +2,8 @@
name: ecs.version
- external: ecs
name: event.ingested
- external: ecs
name: agent.id
- external: ecs
name: file.path
- external: ecs
Expand All @@ -24,6 +26,8 @@
name: process.hash.sha256
- external: ecs
name: process.pid
- external: ecs
name: process.entity_id
- external: ecs
name: process.parent.pid
- external: ecs
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104 changes: 63 additions & 41 deletions packages/santa/data_stream/log/sample_event.json
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@@ -1,73 +1,95 @@
{
"@timestamp": "2022-05-12T11:38:03.923Z",
"@timestamp": "2022-05-12T11:30:05.248Z",
"agent": {
"ephemeral_id": "ea9b3ab9-896a-456a-8e87-7a6452edad19",
"id": "2c596a05-d358-406e-924c-bf221088f43c",
"name": "docker-fleet-agent",
"type": "filebeat",
"version": "8.2.1"
},
"data_stream": {
"dataset": "santa.log",
"namespace": "ep",
"type": "logs"
},
"ecs": {
"version": "8.2.0"
},
"elastic_agent": {
"id": "2c596a05-d358-406e-924c-bf221088f43c",
"snapshot": true,
"version": "8.2.1"
},
"event": {
"action": "exec",
"category": [
"process"
],
"kind": "event",
"original": "[2022-05-12T11:38:03.923Z] I santad: action=EXEC|decision=ALLOW|reason=BINARY|explain=critical system binary|sha256=43158bf397bf52001067319c591249307e2862daf8690828c15cdcc1ddf6166d|cert_sha256=d84db96af8c2e60ac4c851a21ec460f6f84e0235beb17d24a78712b9b021ed57|cert_cn=Software Signing|pid=71993|pidversion=1097732|ppid=1|uid=0|user=root|gid=0|group=wheel|mode=M|path=/usr/libexec/xpcproxy|args=xpcproxy com.apple.CoreAuthentication.agent",
"outcome": "success",
"type": [
"start"
]
"action": "link",
"agent_id_status": "verified",
"dataset": "santa.log",
"ingested": "2022-05-18T03:34:40Z",
"kind": "event"
},
"file": {
"x509": {
"issuer": {
"common_name": "Software Signing"
}
}
"path": "/private/var/db/santa/santa.log",
"target_path": "/private/var/db/santa/santa.log.0"
},
"group": {
"id": "0",
"name": "wheel"
},
"host": {
"architecture": "x86_64",
"containerized": false,
"hostname": "docker-fleet-agent",
"ip": [
"192.168.160.7"
],
"mac": [
"02:42:c0:a8:a0:07"
],
"name": "docker-fleet-agent",
"os": {
"codename": "focal",
"family": "debian",
"kernel": "5.10.104-linuxkit",
"name": "Ubuntu",
"platform": "ubuntu",
"type": "linux",
"version": "20.04.4 LTS (Focal Fossa)"
}
},
"input": {
"type": "log"
},
"log": {
"level": "I"
"file": {
"path": "/tmp/service_logs/santa.log"
},
"level": "I",
"offset": 1150
},
"process": {
"args": [
"/usr/libexec/xpcproxy",
"xpcproxy",
"com.apple.CoreAuthentication.agent"
"/usr/sbin/newsyslog"
],
"executable": "/usr/libexec/xpcproxy",
"hash": {
"sha256": "43158bf397bf52001067319c591249307e2862daf8690828c15cdcc1ddf6166d"
},
"entity_id": "2c596a05-d358-406e-924c-bf221088f43c-71559-1096716",
"executable": "/usr/sbin/newsyslog",
"name": "newsyslog",
"parent": {
"pid": 1
},
"pid": 71993,
"start": "2022-05-12T11:38:03.923Z"
"pid": 71559,
"start": "2022-05-12T11:30:05.248Z"
},
"related": {
"hash": [
"d84db96af8c2e60ac4c851a21ec460f6f84e0235beb17d24a78712b9b021ed57",
"43158bf397bf52001067319c591249307e2862daf8690828c15cdcc1ddf6166d"
],
"user": [
"root"
]
},
"santa": {
"action": "EXEC",
"certificate": {
"common_name": "Software Signing",
"sha256": "d84db96af8c2e60ac4c851a21ec460f6f84e0235beb17d24a78712b9b021ed57"
},
"decision": "ALLOW",
"explain": "critical system binary",
"mode": "M",
"pidversion": 1097732,
"reason": "BINARY"
"action": "LINK",
"pidversion": 1096716
},
"tags": [
"preserve_original_event"
"santa-log"
],
"user": {
"id": "0",
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2 changes: 2 additions & 0 deletions packages/santa/docs/README.md
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Expand Up @@ -103,6 +103,7 @@ An example event for `log` looks as following:
| Field | Description | Type |
|---|---|---|
| @timestamp | Event timestamp. | date |
| agent.id | Unique identifier of this agent (if one exists). Example: For Beats this would be beat.id. | keyword |
| cloud.account.id | The cloud account or organization id used to identify different entities in a multi-tenant environment. Examples: AWS account id, Google Cloud ORG Id, or other unique identifier. | keyword |
| cloud.availability_zone | Availability zone in which this host is running. | keyword |
| cloud.image.id | Image ID for the cloud instance. | keyword |
Expand Down Expand Up @@ -152,6 +153,7 @@ An example event for `log` looks as following:
| log.level | Original log level of the log event. If the source of the event provides a log level or textual severity, this is the one that goes in `log.level`. If your source doesn't specify one, you may put your event transport's severity here (e.g. Syslog severity). Some examples are `warn`, `err`, `i`, `informational`. | keyword |
| log.offset | Log offset | long |
| process.args | Array of process arguments, starting with the absolute path to the executable. May be filtered to protect sensitive information. | keyword |
| process.entity_id | Unique identifier for the process. The implementation of this is specified by the data source, but some examples of what could be used here are a process-generated UUID, Sysmon Process GUIDs, or a hash of some uniquely identifying components of a process. Constructing a globally unique identifier is a common practice to mitigate PID reuse as well as to identify a specific process over time, across multiple monitored hosts. | keyword |
| process.executable | Absolute path to the process executable. | keyword |
| process.executable.text | Multi-field of `process.executable`. | match_only_text |
| process.hash.sha256 | SHA256 hash. | keyword |
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2 changes: 1 addition & 1 deletion packages/santa/manifest.yml
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@@ -1,6 +1,6 @@
name: santa
title: Google Santa Logs
version: 3.0.0
version: 3.1.0
release: ga
description: Collect and parse logs from Google Santa instances with Elastic Agent.
type: integration
Expand Down