shashank-elastic
110 lines
4.9 KiB
TOML
110 lines
4.9 KiB
TOML
[metadata]
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creation_date = "2023/06/09"
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integration = ["endpoint"]
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup, New Term"
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min_stack_version = "8.6.0"
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updated_date = "2023/10/16"
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[rule]
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author = ["Elastic"]
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description = """
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Systemd service files are configuration files in Linux systems used to define and manage system services. Malicious
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actors can leverage systemd service files to achieve persistence by creating or modifying service files to execute
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malicious commands or payloads during system startup. This allows them to maintain unauthorized access, execute
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additional malicious activities, or evade detection.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*", "endgame-*"]
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language = "kuery"
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license = "Elastic License v2"
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name = "New Systemd Service Created by Previously Unknown Process"
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note = """## Setup
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This rule requires data coming in from Elastic Defend.
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### Elastic Defend Integration Setup
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Elastic Defend is integrated into the Elastic Agent using Fleet. Upon configuration, the integration allows
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the Elastic Agent to monitor events on your host and send data to the Elastic Security app.
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#### Prerequisite Requirements:
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- Fleet is required for Elastic Defend.
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- To configure Fleet Server refer to the [documentation](https://www.elastic.co/guide/en/fleet/current/fleet-server.html).
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#### The following steps should be executed in order to add the Elastic Defend integration on a Linux System:
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- Go to the Kibana home page and click Add integrations.
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- In the query bar, search for Elastic Defend and select the integration to see more details about it.
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- Click Add Elastic Defend.
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- Configure the integration name and optionally add a description.
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- Select the type of environment you want to protect, either Traditional Endpoints or Cloud Workloads.
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- Select a configuration preset. Each preset comes with different default settings for Elastic Agent, you can further customize these later by configuring the Elastic Defend integration policy. [Helper guide](https://www.elastic.co/guide/en/security/current/configure-endpoint-integration-policy.html).
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- We suggest to select "Complete EDR (Endpoint Detection and Response)" as a configuration setting, that provides "All events; all preventions"
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- Enter a name for the agent policy in New agent policy name. If other agent policies already exist, you can click the Existing hosts tab and select an existing policy instead.
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For more details on Elastic Agent configuration settings, refer to the [helper guide](https://www.elastic.co/guide/en/fleet/8.10/agent-policy.html).
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- Click Save and Continue.
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- To complete the integration, select Add Elastic Agent to your hosts and continue to the next section to install the Elastic Agent on your hosts.
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For more details on Elastic Defend refer to the [helper guide](https://www.elastic.co/guide/en/security/current/install-endpoint.html).
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"""
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references = [
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"https://opensource.com/article/20/7/systemd-timers",
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"https://pberba.github.io/security/2022/01/30/linux-threat-hunting-for-persistence-systemd-timers-cron/"
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]
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risk_score = 47
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rule_id = "17b0a495-4d9f-414c-8ad0-92f018b8e001"
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severity = "medium"
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tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Persistence", "Tactic: Privilege Escalation", "Data Source: Elastic Endgame", "Data Source: Elastic Defend"]
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timestamp_override = "event.ingested"
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type = "new_terms"
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query = '''
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host.os.type : "linux" and event.action : ("creation" or "file_create_event") and
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file.path : (/etc/systemd/system/* or /usr/local/lib/systemd/system/* or /lib/systemd/system/* or
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/usr/lib/systemd/system/* or /home/*/.config/systemd/user/*) and not
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(process.name : ("dpkg" or "dockerd" or "rpm" or "snapd" or "yum" or "exe" or "dnf" or "dnf-automatic" or python* or
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"elastic-agent" or "cinc-client") or file.extension : ("swp" or "swx"))
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1543"
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name = "Create or Modify System Process"
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reference = "https://attack.mitre.org/techniques/T1543/"
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[[rule.threat.technique.subtechnique]]
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id = "T1543.002"
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name = "Systemd Service"
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reference = "https://attack.mitre.org/techniques/T1543/002/"
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[rule.threat.tactic]
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id = "TA0003"
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name = "Persistence"
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reference = "https://attack.mitre.org/tactics/TA0003/"
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1543"
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name = "Create or Modify System Process"
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reference = "https://attack.mitre.org/techniques/T1543/"
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[[rule.threat.technique.subtechnique]]
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id = "T1543.002"
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name = "Systemd Service"
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reference = "https://attack.mitre.org/techniques/T1543/002/"
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[rule.threat.tactic]
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id = "TA0004"
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name = "Privilege Escalation"
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reference = "https://attack.mitre.org/tactics/TA0004/"
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[rule.new_terms]
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field = "new_terms_fields"
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value = ["file.path", "process.name"]
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[[rule.new_terms.history_window_start]]
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field = "history_window_start"
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value = "now-7d"
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