[New Rule] Unusual User Calling the Metadata Service [Linux] (#327)

* Create ml_linux_anomalous_metadata_user.toml rule create * Update rules/ml/ml_linux_anomalous_metadata_user.toml Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> * Update ml_linux_anomalous_metadata_user.toml * Update ml_linux_anomalous_metadata_user.toml * Update rules/ml/ml_linux_anomalous_metadata_user.toml Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
2020-09-28 12:13:06 -04:00
parent 746c175669
commit 0affb48b07
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+[metadata]
+creation_date = "2020/09/22"
+ecs_version = ["1.6.0"]
+maturity = "production"
+updated_date = "2020/09/22"
+
+[rule]
+anomaly_threshold = 75
+author = ["Elastic"]
+description = """
+Looks for anomalous access to the cloud platform metadata service by an unusual user. The metadata service may be targeted in order to
+harvest credentials or user data scripts containing secrets.
+"""
+false_positives = [
+    """
+    A newly installed program, or one that runs under a new or rarely used user context, could trigger this detection
+    rule. Manual interrogation of the metadata service during debugging or troubleshooting could trigger this rule.
+    """,
+]
+from = "now-45m"
+interval = "15m"
+license = "Elastic License"
+machine_learning_job_id = "linux_rare_metadata_user"
+name = "Unusual Linux User Calling the Metadata Service"
+risk_score = 21
+rule_id = "1faec04b-d902-4f89-8aff-92cd9043c16f"
+severity = "low"
+tags = ["Elastic", "Linux", "ML"]
+type = "machine_learning"