GCP Pub/Sub Topic Creation

 1[metadata]
 2creation_date = "2020/09/23"
 3integration = ["gcp"]
 4maturity = "production"
 5updated_date = "2024/05/21"
 6
 7[rule]
 8author = ["Elastic"]
 9description = """
10Identifies the creation 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 topic is
12used to forward messages from publishers to subscribers.
13"""
14false_positives = [
15    """
16    Topic creations 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 creations 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 Creation"
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/admin"]
29risk_score = 21
30rule_id = "a10d3d9d-0f65-48f1-8b25-af175e2594f5"
31severity = "low"
32tags = [
33    "Domain: Cloud",
34    "Data Source: GCP",
35    "Data Source: Google Cloud Platform",
36    "Use Case: Log Auditing",
37    "Tactic: Collection",
38]
39timestamp_override = "event.ingested"
40type = "query"
41
42query = '''
43event.dataset:gcp.audit and event.action:google.pubsub.v*.Publisher.CreateTopic and event.outcome:success
44'''
45
46
47[[rule.threat]]
48framework = "MITRE ATT&CK"
49[[rule.threat.technique]]
50id = "T1530"
51name = "Data from Cloud Storage"
52reference = "https://attack.mitre.org/techniques/T1530/"
53
54
55[rule.threat.tactic]
56id = "TA0009"
57name = "Collection"
58reference = "https://attack.mitre.org/tactics/TA0009/"