[New Rule] AWS EFS File System or Mount Deleted (#1462)

* AWS EFS File System or Mount Deleted * Update impact_efs_filesystem_or_mount_deleted.toml * Update rules/integrations/aws/impact_efs_filesystem_or_mount_deleted.toml Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com> * Update impact_efs_filesystem_or_mount_deleted.toml * Update impact_efs_filesystem_or_mount_deleted.toml * Update impact_efs_filesystem_or_mount_deleted.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>
2021-10-15 21:23:07 -05:00
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+[metadata]
+creation_date = "2021/08/27"
+maturity = "production"
+updated_date = "2021/10/15"
+integration = "aws"
+
+[rule]
+author = ["Austin Songer"]
+description = """
+Detects when a EFS File System or Mount is deleted. An adversary could break any file system using the mount target that
+is being deleted, which might disrupt instances or applications using those mounts. The mount must be deleted prior to
+deleting the File System, or the adversary will be unable to delete the File System.
+"""
+false_positives = [
+    """
+    File System or Mount being deleted may be performed by a system administrator. Verify whether the user identity,
+    user agent, and/or hostname should be making changes in your environment. File System Mount deleted from unfamiliar
+    users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
+    """,
+]
+from = "now-60m"
+index = ["filebeat-*", "logs-aws*"]
+interval = "10m"
+language = "kuery"
+license = "Elastic License v2"
+name = "AWS EFS File System or Mount Deleted"
+note = """## Config
+
+The AWS Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
+references = [
+    "https://docs.aws.amazon.com/efs/latest/ug/API_DeleteFileSystem.html",
+    "https://docs.aws.amazon.com/efs/latest/ug/API_DeleteMountTarget.html",
+]
+risk_score = 47
+rule_id = "536997f7-ae73-447d-a12d-bff1e8f5f0a0"
+severity = "medium"
+tags = ["Elastic", "Cloud", "AWS", "Continuous Monitoring", "SecOps", "Data Protection"]
+timestamp_override = "event.ingested"
+type = "query"
+
+query = '''
+event.dataset:aws.cloudtrail and event.provider:elasticfilesystem.amazonaws.com and 
+event.action:(DeleteMountTarget or DeleteFileSystem) and event.outcome:success
+'''
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1485"
+name = "Data Destruction"
+reference = "https://attack.mitre.org/techniques/T1485/"
+
+
+[rule.threat.tactic]
+id = "TA0040"
+name = "Impact"
+reference = "https://attack.mitre.org/tactics/TA0040/"
+