persistence_emond_rules_process_execution.toml

[metadata]
creation_date = "2021/01/11"
maturity = "production"
updated_date = "2021/03/08"

[rule]
author = ["Elastic"]
description = """
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.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Suspicious Emond Child Process"
references = ["https://www.xorrior.com/emond-persistence/"]
risk_score = 47
rule_id = "3e3d15c6-1509-479a-b125-21718372157e"
severity = "medium"
tags = ["Elastic", "Host", "macOS", "Threat Detection", "Persistence"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where event.type in ("start", "process_started") and
 process.parent.name : "emond" and
 process.name : (
   "bash",
   "dash",
   "sh",
   "tcsh",
   "csh",
   "zsh",
   "ksh",
   "fish",
   "Python",
   "python*",
   "perl*",
   "php*",
   "osascript",
   "pwsh",
   "curl",
   "wget",
   "cp",
   "mv",
   "touch",
   "echo",
   "base64",
   "launchctl")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1546"
name = "Event Triggered Execution"
reference = "https://attack.mitre.org/techniques/T1546/"
[[rule.threat.technique.subtechnique]]
id = "T1546.014"
name = "Emond"
reference = "https://attack.mitre.org/techniques/T1546/014/"



[rule.threat.tactic]
id = "TA0003"
name = "Persistence"
reference = "https://attack.mitre.org/tactics/TA0003/"