Detection rules › Elastic

Temporary Binary Execution via Osascript

Source
github.com/elastic/protections-artifacts

Detects when a binary is executed from a temporary directory via osascript. Threat actors have been see leveraging applescript to automate post execution tasks, such as downloading and executing a binary from a temporary directory.

MITRE ATT&CK coverage

Telemetry coverage

Rule body

[rule]
description = """
Detects when a binary is executed from a temporary directory via osascript. Threat actors have been see leveraging
applescript to automate post execution tasks, such as downloading and executing a binary from a temporary directory.
"""
id = "a75b6762-fc64-4c96-b3b8-48ed000d997b"
license = "Elastic License v2"
name = "Temporary Binary Execution via Osascript"
os_list = ["macos"]
reference = ["https://x.com/MsftSecIntel/status/1891410993265123662"]
version = "1.0.3"

query = '''
process where event.type == "start" and event.action == "exec" and process.executable like ("/tmp/*", "/private/tmp/*") and 
 process.parent.name == "osascript"
'''

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"

Stages and Predicates

Stage 1: process

process where event.type == "start" and event.action == "exec" and process.executable like ("/tmp/*", "/private/tmp/*") and 
 process.parent.name == "osascript"

Indicators

These rows show field, operator, and value matches.