Brent Murphy
ff45539369
* Demote maturity Co-authored-by: Ross Wolf <31489089+rw-access@users.noreply.github.com>
59 lines
1.9 KiB
TOML
59 lines
1.9 KiB
TOML
[metadata]
|
|
creation_date = "2021/01/15"
|
|
deprecation_date = "2021/04/15"
|
|
maturity = "deprecated"
|
|
updated_date = "2021/04/15"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Identifies the creation or execution of a cron job. Adversaries may abuse cron jobs to perform task scheduling for
|
|
initial or recurring execution of malicious code.
|
|
"""
|
|
false_positives = ["Legitimate software or scripts using cron jobs for recurring tasks."]
|
|
from = "now-9m"
|
|
index = ["auditbeat-*", "logs-endpoint.events.*"]
|
|
language = "kuery"
|
|
license = "Elastic License v2"
|
|
name = "Potential Persistence via Cron Job"
|
|
references = ["https://archive.f-secure.com/weblog/archives/00002576.html", "https://ss64.com/osx/crontab.html"]
|
|
risk_score = 21
|
|
rule_id = "b1c14366-f4f8-49a0-bcbb-51d2de8b0bb8"
|
|
severity = "low"
|
|
tags = ["Elastic", "Host", "Linux", "macOS", "Threat Detection", "Persistence"]
|
|
timestamp_override = "event.ingested"
|
|
type = "query"
|
|
|
|
query = '''
|
|
event.category:process and event.type:(start or process_started or info) and
|
|
not user.name:root and
|
|
((process.name:crontab and not process.args:("-l" or "-r" or "-e" or "-help" or "-h")) or
|
|
(process.parent.name:cron and not process.name:"running job" and
|
|
not process.executable:(/Applications/Docker.app/Contents/Resources/bin/docker or
|
|
/usr/bin/killall or
|
|
/usr/sbin/sendmail or
|
|
/usr/bin/env or
|
|
/usr/bin/timeshift or
|
|
/bin/rm)))
|
|
'''
|
|
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
[[rule.threat.technique]]
|
|
id = "T1053"
|
|
name = "Scheduled Task/Job"
|
|
reference = "https://attack.mitre.org/techniques/T1053/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1053.003"
|
|
name = "Cron"
|
|
reference = "https://attack.mitre.org/techniques/T1053/003/"
|
|
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0003"
|
|
name = "Persistence"
|
|
reference = "https://attack.mitre.org/tactics/TA0003/"
|
|
|