[New Rule] AWS RDS Snapshot Restored (#1312)

* Create exfiltration_rds_snapshot_restored.toml * Update exfiltration_rds_snapshot_restored.toml * Delete exfiltration_rds_snapshot_restored.toml * Create exfiltration_rds_snapshot_restored.toml * Update * Update rules/integrations/aws/exfiltration_rds_snapshot_restored.toml Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com> * Update rules/integrations/aws/exfiltration_rds_snapshot_restored.toml Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com> * Update exfiltration_rds_snapshot_restored.toml * Update exfiltration_rds_snapshot_restored.toml Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>
2021-10-15 14:05:00 -05:00
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+[metadata]
+creation_date = "2021/06/29"
+maturity = "production"
+updated_date = "2021/10/15"
+integration = "aws"
+
+[rule]
+author = ["Austin Songer"]
+description = """
+Identifies when an attempt was made to restored RDS Snapshot. Snapshots are sometimes shared by threat actors in order to
+exfiltrate bulk data. If the permissions were modified, verify if the snapshot was shared with an
+unauthorized or unexpected AWS account.
+"""
+false_positives = [
+    """
+    Restoring snapshots may be done by a system or network administrator. Verify whether the user identity, user agent,
+    and/or hostname should be making changes in your environment. Snapshot restoration from unfamiliar users or hosts should
+    be investigated. If known behavior is causing false positives, it can be exempted from the rule.
+    """,
+]
+index = ["filebeat-*", "logs-aws*"]
+language = "kuery"
+license = "Elastic License v2"
+name = "AWS RDS Snapshot Restored"
+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/AmazonRDS/latest/APIReference/API_RestoreDBInstanceFromDBSnapshot.html",
+    "https://github.com/RhinoSecurityLabs/pacu/blob/master/pacu/modules/rds__explore_snapshots/main.py",
+]
+risk_score = 47
+rule_id = "bf1073bf-ce26-4607-b405-ba1ed8e9e204"
+severity = "medium"
+tags = ["Elastic", "Cloud", "AWS", "Continuous Monitoring", "SecOps", "Asset Visibility"]
+timestamp_override = "event.ingested"
+type = "query"
+
+query = '''
+event.dataset:aws.cloudtrail and event.provider:rds.amazonaws.com and event.action:RestoreDBInstanceFromDBSnapshot and
+event.outcome:success
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+
+[rule.threat.tactic]
+id = "TA0010"
+name = "Exfiltration"
+reference = "https://attack.mitre.org/tactics/TA0010/"
+