GCP Pub/Sub Topic Deletion

 1[metadata]
 2creation_date = "2020/09/18"
 3integration = ["gcp"]
 4maturity = "production"
 5updated_date = "2024/05/21"
 6
 7[rule]
 8author = ["Elastic"]
 9description = """
10Identifies the deletion of a topic in Google Cloud Platform (GCP). In GCP, the publisher-subscriber relationship
11(Pub/Sub) is an asynchronous messaging service that decouples event-producing and event-processing services. A publisher
12application creates and sends messages to a topic. Deleting a topic can interrupt message flow in the Pub/Sub pipeline.
13"""
14false_positives = [
15    """
16    Topic deletions may be done by a system or network administrator. Verify whether the user email, resource name,
17    and/or hostname should be making changes in your environment. Topic deletions by unfamiliar users or hosts should be
18    investigated. If known behavior is causing false positives, it can be exempted from the rule.
19    """,
20]
21index = ["filebeat-*", "logs-gcp*"]
22language = "kuery"
23license = "Elastic License v2"
24name = "GCP Pub/Sub Topic Deletion"
25note = """## Setup
26
27The GCP Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
28references = ["https://cloud.google.com/pubsub/docs/overview"]
29risk_score = 21
30rule_id = "3202e172-01b1-4738-a932-d024c514ba72"
31severity = "low"
32tags = [
33    "Domain: Cloud",
34    "Data Source: GCP",
35    "Data Source: Google Cloud Platform",
36    "Use Case: Log Auditing",
37    "Tactic: Defense Evasion",
38]
39timestamp_override = "event.ingested"
40type = "query"
41
42query = '''
43event.dataset:gcp.audit and event.action:google.pubsub.v*.Publisher.DeleteTopic and event.outcome:success
44'''
45
46
47[[rule.threat]]
48framework = "MITRE ATT&CK"
49[[rule.threat.technique]]
50id = "T1562"
51name = "Impair Defenses"
52reference = "https://attack.mitre.org/techniques/T1562/"
53
54
55[rule.threat.tactic]
56id = "TA0005"
57name = "Defense Evasion"
58reference = "https://attack.mitre.org/tactics/TA0005/"