Suspicious Curl Execution via Automator Workflow

[rule]
description = """
Detects Automator spawning shell interpreters to execute curl with file output arguments within 10 seconds. This
indicates abuse of trusted Automator workflows for malicious file downloads.
"""
id = "45d8fbd2-f441-4d0b-a575-613591d45738"
license = "Elastic License v2"
name = "Suspicious Curl Execution via Automator Workflow"
os_list = ["macos"]
version = "1.0.3"

query = '''
sequence with maxspan=10s
[process where event.type == "start" and event.action == "exec" and process.name in ("bash", "zsh", "sh") and process.args == "-c" and process.parent.name == "Automator"] by process.entity_id
[process where event.type == "start" and event.action == "exec" and process.name in ("curl", "nscurl") and process.args in ("-o", "--output", "-O", "--remote-name")] by process.parent.entity_id
'''

min_endpoint_version = "8.16.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1059"
name = "Command and Scripting Interpreter"
reference = "https://attack.mitre.org/techniques/T1059/"
[[threat.technique.subtechnique]]
id = "T1059.004"
name = "Unix Shell"
reference = "https://attack.mitre.org/techniques/T1059/004/"



[threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1105"
name = "Ingress Tool Transfer"
reference = "https://attack.mitre.org/techniques/T1105/"


[threat.tactic]
id = "TA0011"
name = "Command and Control"
reference = "https://attack.mitre.org/tactics/TA0011/"

[internal]
min_endpoint_version = "8.16.0"