Brent Murphy
95877f7879
* update event.category for azure rules * update updated_date field * update name to include Azure * Update persistence_user_added_as_owner_for_azure_service_principal.toml
65 lines
2.2 KiB
TOML
65 lines
2.2 KiB
TOML
[metadata]
|
|
creation_date = "2020/08/31"
|
|
ecs_version = ["1.6.0"]
|
|
maturity = "production"
|
|
updated_date = "2020/09/23"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Identifies an invitation to an external user in Azure Active Directory (AD). Azure AD is extended to include
|
|
collaboration, allowing you to invite people from outside your organization to be guest users in your cloud account.
|
|
Unless there is a business need to provision guest access, it is best practice avoid creating guest users. Guest users
|
|
could potentially be overlooked indefinitely leading to a potential vulnerability.
|
|
"""
|
|
false_positives = [
|
|
"""
|
|
Guest user invitations may be sent out by a system or network administrator. Verify whether the username, hostname,
|
|
and/or resource name should be making changes in your environment. Guest user invitations from unfamiliar users or
|
|
hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
|
|
""",
|
|
]
|
|
from = "now-25m"
|
|
index = ["filebeat-*"]
|
|
language = "kuery"
|
|
license = "Elastic License"
|
|
name = "Azure External Guest User Invitation"
|
|
note = "The Azure Filebeat module must be enabled to use this rule."
|
|
references = ["https://docs.microsoft.com/en-us/azure/governance/policy/samples/cis-azure-1-1-0"]
|
|
risk_score = 21
|
|
rule_id = "141e9b3a-ff37-4756-989d-05d7cbf35b0e"
|
|
severity = "low"
|
|
tags = ["Elastic", "Azure", "SecOps", "Continuous Monitoring", "Identity and Access"]
|
|
type = "query"
|
|
|
|
query = '''
|
|
event.module:azure and event.dataset:azure.auditlogs and azure.auditlogs.operation_name:"Invite external user" and azure.auditlogs.properties.target_resources.*.display_name:guest and event.outcome:Success
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1078"
|
|
name = "Valid Accounts"
|
|
reference = "https://attack.mitre.org/techniques/T1078/"
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0001"
|
|
name = "Initial Access"
|
|
reference = "https://attack.mitre.org/tactics/TA0001/"
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1078"
|
|
name = "Valid Accounts"
|
|
reference = "https://attack.mitre.org/techniques/T1078/"
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0003"
|
|
name = "Persistence"
|
|
reference = "https://attack.mitre.org/tactics/TA0003/"
|
|
|