Abnormally Large Javascript Evaluation via Nodejs

[rule]
description = """
Detects when an abnormally large amount of JavaScript is supplied to Node.js for execution via the evaluate flag. This
behavior has been observed in DPRK-attributed malware campaigns.
"""
id = "76259650-ed25-4d48-9cb2-e4a32073f945"
license = "Elastic License v2"
name = "Abnormally Large Javascript Evaluation via Nodejs"
os_list = ["macos"]
reference = ["https://kl4r10n.tech/blog/dprk-new-malware"]
version = "1.0.1"

query = '''
process where event.type == "start" and event.action == "exec" and process.name == "node" and process.args == "node" and
 process.args == "-e" and process.args_count == 3 and process.command_line == null and process.parent.name == "node"
'''

min_endpoint_version = "8.10.2"
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 = "T1059.007"
name = "JavaScript"
reference = "https://attack.mitre.org/techniques/T1059/007/"



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

[internal]
min_endpoint_version = "8.10.2"