Potential Admin Group Account Addition

 1[metadata]
 2creation_date = "2020/01/05"
 3integration = ["endpoint"]
 4maturity = "production"
 5min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 6min_stack_version = "8.3.0"
 7updated_date = "2023/06/22"
 8
 9[rule]
10author = ["Elastic"]
11description = """
12Identifies attempts to add an account to the admin group via the command line. This could be an indication of privilege
13escalation activity.
14"""
15from = "now-9m"
16index = ["auditbeat-*", "logs-endpoint.events.*"]
17language = "kuery"
18license = "Elastic License v2"
19name = "Potential Admin Group Account Addition"
20references = ["https://managingosx.wordpress.com/2010/01/14/add-a-user-to-the-admin-group-via-command-line-3-0/"]
21risk_score = 47
22rule_id = "565c2b44-7a21-4818-955f-8d4737967d2e"
23severity = "medium"
24tags = ["Domain: Endpoint", "OS: macOS", "Use Case: Threat Detection", "Tactic: Privilege Escalation", "Data Source: Elastic Defend"]
25timestamp_override = "event.ingested"
26type = "query"
27
28query = '''
29event.category:process and host.os.type:macos and event.type:(start or process_started) and
30 process.name:(dscl or dseditgroup) and process.args:(("/Groups/admin" or admin) and ("-a" or "-append"))
31'''
32
33
34[[rule.threat]]
35framework = "MITRE ATT&CK"
36[[rule.threat.technique]]
37id = "T1078"
38name = "Valid Accounts"
39reference = "https://attack.mitre.org/techniques/T1078/"
40[[rule.threat.technique.subtechnique]]
41id = "T1078.003"
42name = "Local Accounts"
43reference = "https://attack.mitre.org/techniques/T1078/003/"
44
45
46
47[rule.threat.tactic]
48id = "TA0004"
49name = "Privilege Escalation"
50reference = "https://attack.mitre.org/tactics/TA0004/"