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[New Rules] UEBA GItHub BBRs and Rules (#3174)

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* [New Rules] UEBA GItHub BBRs and Rules

A new set of BBRs and rules that will be used to trigger new UEBA GitHub threshold Rules.

* Update rules/integrations/github/impact_github_member_removed_from_organization.toml

* Apply suggestions from code review

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>

* edited BBR rules

-removed newly added member rule

* updated integration manifests and schemas

* Updated min_stack for some rules based on newest GitHub integration schema manifest

* testing min_stack bump to 8.8 for new fields

* removing offending rule to troubleshoot seperately

* added UEBA tags and created UEBA threshold rule

* updated non-ecs-schema to add signal.rule.tags

* updated non-ecs-schema with kibana.alert.workflow_status

* updated rule.threat.tactic

* added user.name to non-ecs-schema

* added quotes to kibana.alert.workflow_status value

* removed trailing space from rule name

* update tags and optimize query for UEBA threshold rule

* removed integration field from Higher-Order rule

* Apply suggestions from code review

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>

* adjusted new_terms order and rule types based on review feedback

* Apply suggestions from code review

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>

* remove user.name from detection_rules/etc/non-ecs-schema.json

* fix json formatting

---------

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>
Co-authored-by: Justin Ibarra <16747370+brokensound77@users.noreply.github.com>
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>

(cherry picked from commit 442435830f)
This commit is contained in:
Isai
2024-01-22 12:48:31 -05:00
committed by github-actions[bot]
parent cdbf64d360
commit cfb4f1a013
21 changed files with 973 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
rules/integrations/github/execution_github_app_deleted.toml
+45
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@@ -0,0 +1,45 @@
[metadata]
creation_date = "2023/10/11"
integration = ["github"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/10/11"
[rule]
author = ["Elastic"]
description = """
Detects the deletion of a GitHub app either from a repo or an organization.
"""
from = "now-9m"
index = ["logs-github.audit-*"]
language = "eql"
license = "Elastic License v2"
name = "GitHub App Deleted"
risk_score = 21
rule_id = "fd01b949-81be-46d5-bcf8-284395d5f56d"
severity = "low"
tags = ["Domain: Cloud",
"Use Case: Threat Detection",
"Tactic: Execution",
"Data Source: Github"
]
timestamp_override = "event.ingested"
type = "eql"
query = '''
configuration where event.dataset == "github.audit" and github.category == "integration_installation" and event.type == "deletion"
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1648"
name = "Serverless Execution"
reference = "https://attack.mitre.org/techniques/T1648/"
[rule.threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
rules/integrations/github/execution_github_high_number_of_cloned_repos_from_pat.toml
+56
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@@ -0,0 +1,56 @@
[metadata]
creation_date = "2023/10/11"
integration = ["github"]
maturity = "production"
min_stack_comments = "New fields added to GitHub Integration"
min_stack_version = "8.8.0"
updated_date = "2023/12/14"
[rule]
author = ["Elastic"]
description = """
Detects a high number of unique private repo clone events originating from a single personal access token within a short time period.
"""
from = "now-6m"
index = ["logs-github.audit-*"]
language = "kuery"
license = "Elastic License v2"
name = "High Number of Cloned GitHub Repos From PAT"
risk_score = 21
rule_id = "fb0afac5-bbd6-49b0-b4f8-44e5381e1587"
severity = "low"
tags = ["Domain: Cloud",
"Use Case: Threat Detection",
"Use Case: UEBA",
"Tactic: Execution",
"Data Source: Github"
]
timestamp_override = "event.ingested"
type = "threshold"
query = '''
event.dataset:"github.audit" and event.category:"configuration" and event.action:"git.clone" and
github.programmatic_access_type:("OAuth access token" or "Fine-grained personal access token") and
github.repository_public:false
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1648"
name = "Serverless Execution"
reference = "https://attack.mitre.org/techniques/T1648/"
[rule.threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
[rule.threshold]
field = ["github.hashed_token"]
value = 1
[[rule.threshold.cardinality]]
field = "github.repo"
value = 10
rules/integrations/github/execution_github_ueba_multiple_behavior_alerts_from_account.toml
+52
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@@ -0,0 +1,52 @@
[metadata]
creation_date = "2023/12/14"
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/12/18"
[rule]
author = ["Elastic"]
description = """
This rule is part of the "GitHub UEBA - Unusual Activity from Account Pack", and leverages alert data to
determine when multiple alerts are executed by the same user in a timespan of one hour.
Analysts can use this to prioritize triage and response, as these alerts are a higher indicator of compromised user
accounts or PATs.
"""
from = "now-60m"
index = [".alerts-security.*"]
language = "kuery"
license = "Elastic License v2"
name = "GitHub UEBA - Multiple Alerts from a GitHub Account"
risk_score = 47
rule_id = "929223b4-fba3-4a1c-a943-ec4716ad23ec"
severity = "medium"
tags = ["Domain: Cloud",
"Use Case: Threat Detection",
"Use Case: UEBA",
"Tactic: Execution",
"Rule Type: Higher-Order Rule",
"Data Source: Github"
]
timestamp_override = "event.ingested"
type = "threshold"
query = '''
signal.rule.tags:("Use Case: UEBA" and "Data Source: Github") and kibana.alert.workflow_status:"open"
'''
[[rule.threat]]
framework = "MITRE ATT&CK"
[rule.threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
[rule.threshold]
field = ["user.name"]
value = 1
[[rule.threshold.cardinality]]
field = "signal.rule.name"
value = 5
rules/integrations/github/impact_github_repository_deleted.toml
+7 -3
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@@ -4,7 +4,7 @@ integration = ["github"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/08/29"
updated_date = "2023/12/14"
[rule]
author = ["Elastic"]
@@ -24,7 +24,12 @@ name = "GitHub Repository Deleted"
risk_score = 47
rule_id = "345889c4-23a8-4bc0-b7ca-756bd17ce83b"
severity = "medium"
tags = ["Domain: Cloud", "Use Case: Threat Detection", "Tactic: Impact", "Data Source: Github"]
tags = ["Domain: Cloud",
"Use Case: Threat Detection",
"Use Case: UEBA",
"Tactic: Impact",
"Data Source: Github"
]
timestamp_override = "event.ingested"
type = "eql"
query = '''
@@ -44,4 +49,3 @@ reference = "https://attack.mitre.org/techniques/T1485/"
id = "TA0040"
name = "Impact"
reference = "https://attack.mitre.org/tactics/TA0040/"
rules/integrations/github/persistence_github_org_owner_added.toml
+7 -2
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@@ -4,7 +4,7 @@ integration = ["github"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/11"
updated_date = "2023/12/14"
[rule]
author = ["Elastic"]
@@ -21,7 +21,12 @@ name = "New GitHub Owner Added"
risk_score = 47
rule_id = "24401eca-ad0b-4ff9-9431-487a8e183af9"
severity = "medium"
tags = ["Domain: Cloud", "Use Case: Threat Detection", "Tactic: Persistence", "Data Source: Github"]
tags = ["Domain: Cloud",
"Use Case: Threat Detection",
"Use Case: UEBA",
"Tactic: Persistence",
"Data Source: Github"
]
timestamp_override = "event.ingested"
type = "eql"
query = '''
rules/integrations/github/persistence_organization_owner_role_granted.toml
+7 -2
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@@ -4,7 +4,7 @@ integration = ["github"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/11"
updated_date = "2023/12/14"
[rule]
author = ["Elastic"]
@@ -21,7 +21,12 @@ name = "GitHub Owner Role Granted To User"
risk_score = 47
rule_id = "9b343b62-d173-4cfd-bd8b-e6379f964ca4"
severity = "medium"
tags = ["Domain: Cloud", "Use Case: Threat Detection", "Tactic: Persistence", "Data Source: Github"]
tags = ["Domain: Cloud",
"Use Case: Threat Detection",
"Use Case: UEBA",
"Tactic: Persistence",
"Data Source: Github"
]
timestamp_override = "event.ingested"
type = "eql"
query = '''