Untrusted or Unsigned binary Execution via Osascript

[rule]
description = """
Detects when Osascript is used to execute an unsigned or untrusted binary. This is highly un-common and has been
observed in several malware campaigns in order to execute second-stage payloads.
"""
id = "8d320f09-1887-4390-905b-6cad0df36653"
license = "Elastic License v2"
name = "Untrusted or Unsigned binary Execution via Osascript"
os_list = ["macos"]
reference = ["https://x.com/malwrhunterteam/status/1844466094159053019"]
version = "1.0.5"

query = '''
process where event.type == "start" and event.action == "exec" and process.parent.name == "osascript" and 
 (process.code_signature.trusted == false or process.code_signature.exists == false) and
 not process.executable like "/opt/homebrew/*" and
 not process.Ext.effective_parent.executable like "/Applications/Alfred 5.app/Contents/MacOS/Alfred"
'''

min_endpoint_version = "8.11.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0

[[actions]]
action = "kill_process"
field = "process.parent.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 = "T1059.002"
name = "AppleScript"
reference = "https://attack.mitre.org/techniques/T1059/002/"



[threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"

[internal]
min_endpoint_version = "8.11.0"