[metadata]
creation_date = "2020/08/18"
maturity = "production"
updated_date = "2020/12/15"

[rule]
author = ["Elastic"]
description = """
Identifies when an Event Hub Authorization Rule is created or updated in Azure. An authorization rule is associated with
specific rights, and carries a pair of cryptographic keys. When you create an Event Hubs namespace, a policy rule named
RootManageSharedAccessKey is created for the namespace. This has manage permissions for the entire namespace and it's
recommended that you treat this rule like an administrative root account and don't use it in your application.
"""
false_positives = [
    """
    Authorization rule additions or modifications may be done by a system or network administrator. Verify whether the
    username, hostname, and/or resource name should be making changes in your environment. Authorization rule additions
    or modifications 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-*", "logs-azure*"]
language = "kuery"
license = "Elastic License"
name = "Azure Event Hub Authorization Rule Created or Updated"
note = "The Azure Filebeat module must be enabled to use this rule."
references = ["https://docs.microsoft.com/en-us/azure/event-hubs/authorize-access-shared-access-signature"]
risk_score = 47
rule_id = "b6dce542-2b75-4ffb-b7d6-38787298ba9d"
severity = "medium"
tags = ["Elastic", "Cloud", "Azure", "Continuous Monitoring", "SecOps", "Log Auditing"]
type = "query"

query = '''
event.dataset:azure.activitylogs and azure.activitylogs.operation_name:MICROSOFT.EVENTHUB/NAMESPACES/AUTHORIZATIONRULES/WRITE and event.outcome:(Success or success)
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1530"
name = "Data from Cloud Storage Object"
reference = "https://attack.mitre.org/techniques/T1530/"


[rule.threat.tactic]
id = "TA0009"
name = "Collection"
reference = "https://attack.mitre.org/tactics/TA0009/"
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1537"
name = "Transfer Data to Cloud Account"
reference = "https://attack.mitre.org/techniques/T1537/"


[rule.threat.tactic]
id = "TA0010"
name = "Exfiltration"
reference = "https://attack.mitre.org/tactics/TA0010/"

