sigma-rules/rules/linux/persistence_kde_autostart_modification.toml

[metadata]
creation_date = "2021/01/06"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/02/22"

[rule]
author = ["Elastic"]
description = """
Identifies the creation or modification of a K Desktop Environment (KDE) AutoStart script or desktop file that will
execute upon each user logon. Adversaries may abuse this method for persistence.
"""
from = "now-9m"
index = ["auditbeat-*", "logs-endpoint.events.*", "endgame-*"]
language = "eql"
license = "Elastic License v2"
name = "Persistence via KDE AutoStart Script or Desktop File Modification"
note = """## 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 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
"""
references = [
    "https://userbase.kde.org/System_Settings/Autostart",
    "https://www.amnesty.org/en/latest/research/2020/09/german-made-finspy-spyware-found-in-egypt-and-mac-and-linux-versions-revealed/",
    "https://www.intezer.com/blog/research/operation-electrorat-attacker-creates-fake-companies-to-drain-your-crypto-wallets/",
]
risk_score = 47
rule_id = "e3e904b3-0a8e-4e68-86a8-977a163e21d3"
severity = "medium"
tags = ["Elastic", "Host", "Linux", "Threat Detection", "Persistence", "Elastic Endgame"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
file where host.os.type == "linux" and event.type != "deletion" and
  file.extension in ("sh", "desktop") and
  file.path :
    (
      "/home/*/.config/autostart/*", "/root/.config/autostart/*",
      "/home/*/.kde/Autostart/*", "/root/.kde/Autostart/*",
      "/home/*/.kde4/Autostart/*", "/root/.kde4/Autostart/*",
      "/home/*/.kde/share/autostart/*", "/root/.kde/share/autostart/*",
      "/home/*/.kde4/share/autostart/*", "/root/.kde4/share/autostart/*",
      "/home/*/.local/share/autostart/*", "/root/.local/share/autostart/*",
      "/home/*/.config/autostart-scripts/*", "/root/.config/autostart-scripts/*",
      "/etc/xdg/autostart/*", "/usr/share/autostart/*"
    ) and
    not process.name in ("yum", "dpkg", "install", "dnf", "teams", "yum-cron", "dnf-automatic")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1547"
name = "Boot or Logon Autostart Execution"
reference = "https://attack.mitre.org/techniques/T1547/"


[rule.threat.tactic]
id = "TA0003"
name = "Persistence"
reference = "https://attack.mitre.org/tactics/TA0003/"