Suspicious Emond Child Process
Identifies the execution of a suspicious child process of the Event Monitor Daemon (emond). Adversaries may abuse this service by writing a rule to execute commands when a defined event occurs, such as system start up or user authentication.
Elastic rule (View on GitHub)
1[metadata]
2creation_date = "2021/01/11"
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 the execution of a suspicious child process of the Event Monitor Daemon (emond). Adversaries may abuse this
13service by writing a rule to execute commands when a defined event occurs, such as system start up or user
14authentication.
15"""
16from = "now-9m"
17index = ["logs-endpoint.events.*"]
18language = "eql"
19license = "Elastic License v2"
20name = "Suspicious Emond Child Process"
21references = ["https://www.xorrior.com/emond-persistence/"]
22risk_score = 47
23rule_id = "3e3d15c6-1509-479a-b125-21718372157e"
24severity = "medium"
25tags = ["Domain: Endpoint", "OS: macOS", "Use Case: Threat Detection", "Tactic: Persistence", "Data Source: Elastic Defend"]
26timestamp_override = "event.ingested"
27type = "eql"
28
29query = '''
30process where host.os.type == "macos" and event.type in ("start", "process_started") and
31 process.parent.name : "emond" and
32 process.name : (
33 "bash",
34 "dash",
35 "sh",
36 "tcsh",
37 "csh",
38 "zsh",
39 "ksh",
40 "fish",
41 "Python",
42 "python*",
43 "perl*",
44 "php*",
45 "osascript",
46 "pwsh",
47 "curl",
48 "wget",
49 "cp",
50 "mv",
51 "touch",
52 "echo",
53 "base64",
54 "launchctl")
55'''
56
57
58[[rule.threat]]
59framework = "MITRE ATT&CK"
60[[rule.threat.technique]]
61id = "T1546"
62name = "Event Triggered Execution"
63reference = "https://attack.mitre.org/techniques/T1546/"
64[[rule.threat.technique.subtechnique]]
65id = "T1546.014"
66name = "Emond"
67reference = "https://attack.mitre.org/techniques/T1546/014/"
68
69
70
71[rule.threat.tactic]
72id = "TA0003"
73name = "Persistence"
74reference = "https://attack.mitre.org/tactics/TA0003/"
References
Related rules
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