[metadata]
creation_date = "2020/09/18"
maturity = "production"
updated_date = "2020/12/16"

[rule]
author = ["Elastic"]
description = """
Identifies the deletion of a topic in Google Cloud Platform (GCP). In GCP, the publisher-subscriber relationship
(Pub/Sub) is an asynchronous messaging service that decouples event-producing and event-processing services. A publisher
application creates and sends messages to a topic. Deleting a topic can interrupt message flow in the Pub/Sub pipeline.
"""
false_positives = [
    """
    Topic deletions may be done by a system or network administrator. Verify whether the user email, resource name,
    and/or hostname should be making changes in your environment. Topic deletions 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-gcp*"]
language = "kuery"
license = "Elastic License"
name = "GCP Pub/Sub Topic Deletion"
note = "The GCP Filebeat module must be enabled to use this rule."
references = ["https://cloud.google.com/pubsub/docs/overview"]
risk_score = 21
rule_id = "3202e172-01b1-4738-a932-d024c514ba72"
severity = "low"
tags = ["Elastic", "Cloud", "GCP", "Continuous Monitoring", "SecOps", "Log Auditing"]
type = "query"

query = '''
event.dataset:(googlecloud.audit or gcp.audit) and event.action:google.pubsub.v*.Publisher.DeleteTopic and event.outcome:success
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1562"
name = "Impair Defenses"
reference = "https://attack.mitre.org/techniques/T1562/"


[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"

