AWS STS GetSessionToken Abuse

 1[metadata]
 2creation_date = "2021/05/17"
 3integration = ["aws"]
 4maturity = "production"
 5min_stack_comments = "AWS integration breaking changes, bumping version to ^2.0.0"
 6min_stack_version = "8.9.0"
 7updated_date = "2024/04/14"
 8
 9[rule]
10author = ["Austin Songer"]
11description = """
12Identifies the suspicious use of GetSessionToken. Tokens could be created and used by attackers to move laterally and
13escalate privileges.
14"""
15false_positives = [
16    """
17    GetSessionToken may be done by a system or network administrator. Verify whether the user identity, user agent,
18    and/or hostname should be making changes in your environment. GetSessionToken from unfamiliar users or hosts should
19    be investigated. If known behavior is causing false positives, it can be exempted from the rule.
20    """,
21]
22index = ["filebeat-*", "logs-aws.cloudtrail-*"]
23language = "kuery"
24license = "Elastic License v2"
25name = "AWS STS GetSessionToken Abuse"
26note = """## Setup
27
28The AWS Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
29references = ["https://docs.aws.amazon.com/STS/latest/APIReference/API_GetSessionToken.html"]
30risk_score = 21
31rule_id = "b45ab1d2-712f-4f01-a751-df3826969807"
32severity = "low"
33tags = ["Domain: Cloud", "Data Source: AWS", "Data Source: Amazon Web Services",  "Data Source: AWS STS", "Use Case: Identity and Access Audit", "Tactic: Privilege Escalation"]
34timestamp_override = "event.ingested"
35type = "query"
36
37query = '''
38event.dataset:aws.cloudtrail and event.provider:sts.amazonaws.com and event.action:GetSessionToken and
39aws.cloudtrail.user_identity.type:IAMUser and event.outcome:success
40'''
41
42
43[[rule.threat]]
44framework = "MITRE ATT&CK"
45[[rule.threat.technique]]
46id = "T1548"
47name = "Abuse Elevation Control Mechanism"
48reference = "https://attack.mitre.org/techniques/T1548/"
49
50
51[rule.threat.tactic]
52id = "TA0004"
53name = "Privilege Escalation"
54reference = "https://attack.mitre.org/tactics/TA0004/"
55[[rule.threat]]
56framework = "MITRE ATT&CK"
57[[rule.threat.technique]]
58id = "T1550"
59name = "Use Alternate Authentication Material"
60reference = "https://attack.mitre.org/techniques/T1550/"
61[[rule.threat.technique.subtechnique]]
62id = "T1550.001"
63name = "Application Access Token"
64reference = "https://attack.mitre.org/techniques/T1550/001/"
65
66
67
68[rule.threat.tactic]
69id = "TA0008"
70name = "Lateral Movement"
71reference = "https://attack.mitre.org/tactics/TA0008/"