[New Rule] Azure Event Hub Authorization Rule Created or Updated (#173)

* Create collection_update_event_hub_auth_rule.toml * Update rules/azure/collection_update_event_hub_auth_rule.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> * Update rules/azure/collection_update_event_hub_auth_rule.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
2020-09-04 09:32:30 -04:00
parent 0ac7f3d672
commit a49d102de3
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+[metadata]
+creation_date = "2020/08/18"
+ecs_version = ["1.6.0"]
+maturity = "production"
+updated_date = "2020/08/18"
+
+[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-*"]
+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 = ["Azure", "Elastic", "SecOps", "Continuous Monitoring", "Logging"]
+type = "query"
+
+query = '''
+event.module:azure and event.dataset:azure.activitylogs and event.category:Administrative and azure.activitylogs.operation_name:MICROSOFT.EVENTHUB/NAMESPACES/AUTHORIZATIONRULES/WRITE and event.outcome: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/"