defense_evasion_timestomp_touch.toml

[metadata]
creation_date = "2020/11/03"
integration = ["endpoint"]
maturity = "production"
updated_date = "2024/05/21"

[rule]
author = ["Elastic"]
description = """
Timestomping is an anti-forensics technique which is used to modify the timestamps of a file, often to mimic files that
are in the same folder.
"""
from = "now-9m"
index = ["auditbeat-*", "logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
max_signals = 33
name = "Timestomping using Touch Command"
risk_score = 47
rule_id = "b0046934-486e-462f-9487-0d4cf9e429c6"
setup = """## Setup

If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2,
events will not define `event.ingested` and default fallback for EQL rules was not added until version 8.2.
Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
`event.ingested` to @timestamp.
For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
"""
severity = "medium"
tags = [
    "Domain: Endpoint",
    "OS: Linux",
    "OS: macOS",
    "Use Case: Threat Detection",
    "Tactic: Defense Evasion",
    "Data Source: Elastic Defend",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where event.type == "start" and
 process.name : "touch" and user.id != "0" and
 process.args : ("-r", "-t", "-a*","-m*") and
 not process.args : (
   "/usr/lib/go-*/bin/go", "/usr/lib/dracut/dracut-functions.sh", "/tmp/KSInstallAction.*/m/.patch/*"
) and not process.parent.name in ("pmlogger_daily", "pmlogger_janitor", "systemd")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1070"
name = "Indicator Removal"
reference = "https://attack.mitre.org/techniques/T1070/"
[[rule.threat.technique.subtechnique]]
id = "T1070.006"
name = "Timestomp"
reference = "https://attack.mitre.org/techniques/T1070/006/"



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