defense_evasion_unusual_dir_ads.toml

[metadata]
creation_date = "2020/12/04"
maturity = "production"
updated_date = "2021/09/23"

[rule]
author = ["Elastic"]
description = """
Identifies processes running from an Alternate Data Stream. This is uncommon for legitimate processes and sometimes done
by adversaries to hide malware.
"""
from = "now-9m"
index = ["logs-endpoint.events.*", "winlogbeat-*", "logs-windows.*"]
language = "eql"
license = "Elastic License v2"
name = "Unusual Process Execution Path - Alternate Data Stream"
risk_score = 47
rule_id = "4bd1c1af-79d4-4d37-9efa-6e0240640242"
severity = "medium"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where event.type == "start" and
  process.args : "?:\\*:*" and process.args_count == 1
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1564"
name = "Hide Artifacts"
reference = "https://attack.mitre.org/techniques/T1564/"
[[rule.threat.technique.subtechnique]]
id = "T1564.004"
name = "NTFS File Attributes"
reference = "https://attack.mitre.org/techniques/T1564/004/"


[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"