Suspicious JavaScript Execution via Deno

Source: github.com/elastic/protections-artifacts

Identifies attempts to execute JavaScript using Deno with suspicious command line value. Adversaries may abuse this utility to execute malicious JavaScript.

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1059.007` Command and Scripting Interpreter: JavaScript

Rule body

[rule]
description = """
Identifies attempts to execute JavaScript using Deno with suspicious command line value. Adversaries may abuse this
utility to execute malicious JavaScript.
"""
id = "ff18d24b-2ba6-4691-a17f-75c4380d0965"
license = "Elastic License v2"
name = "Suspicious JavaScript Execution via Deno"
os_list = ["windows"]
reference = ["https://deno.com/"]
version = "1.0.1"

query = '''
process where event.action== "start" and
 (process.name : "deno.exe" or process.pe.original_file_name == "deno.exe" or process.code_signature.subject_name == "Deno Land Inc.") and
  process.command_line : ("*javascript*base64*", "*eval(*", "*http*", "*javascript*import*")
'''

min_endpoint_version = "7.15.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0
tree = true

[[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 = "7.15.0"

Stages and Predicates

Stage 1: `process`

process where event.action== "start" and
 (process.name : "deno.exe" or process.pe.original_file_name == "deno.exe" or process.code_signature.subject_name == "Deno Land Inc.") and
  process.command_line : ("*javascript*base64*", "*eval(*", "*http*", "*javascript*import*")

Indicators

These rows show field, operator, and value matches.