diff --git a/rules/integrations/azure/defense_evasion_kubernetes_events_deleted.toml b/rules/integrations/azure/defense_evasion_kubernetes_events_deleted.toml new file mode 100644 index 000000000..57f67d2f7 --- /dev/null +++ b/rules/integrations/azure/defense_evasion_kubernetes_events_deleted.toml @@ -0,0 +1,61 @@ +[metadata] +creation_date = "2021/06/24" +maturity = "production" +updated_date = "2021/10/13" +integration = "azure" + +[rule] +author = ["Austin Songer"] +description = """ +Identifies when Events are deleted in Azure Kubernetes. Kubernetes events are objects that log any state changes. +Example events are a container creation, an image pull, or a pod scheduling on a node. An adversary may delete events +in Azure Kubernetes in an attempt to evade detection. +""" +false_positives = [ + """ + Events deletions 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. Events deletions 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 v2" +name = "Azure Kubernetes Events Deleted" +note = """## Config + +The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.""" +references = [ + "https://docs.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftkubernetes", +] +risk_score = 47 +rule_id = "8b64d36a-1307-4b2e-a77b-a0027e4d27c8" +severity = "medium" +tags = ["Elastic", "Cloud", "Azure", "Continuous Monitoring", "SecOps", "Log Auditing"] +timestamp_override = "event.ingested" +type = "query" + +query = ''' +event.dataset:azure.activitylogs and azure.activitylogs.operation_name:"MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/EVENTS.K8S.IO/EVENTS/DELETE" and +event.outcome:(Success or success) +''' + + +[[rule.threat]] +framework = "MITRE ATT&CK" +[[rule.threat.technique]] +id = "T1562" +name = "Impair Defenses" +reference = "https://attack.mitre.org/techniques/T1562/" +[[rule.threat.technique.subtechnique]] +id = "T1562.001" +name = "Disable or Modify Tools" +reference = "https://attack.mitre.org/techniques/T1562/001/" + + + +[rule.threat.tactic] +id = "TA0005" +name = "Defense Evasion" +reference = "https://attack.mitre.org/tactics/TA0005/"