shashank-elastic
91 lines
3.9 KiB
TOML
91 lines
3.9 KiB
TOML
[metadata]
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creation_date = "2023/10/26"
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integration = ["endpoint"]
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maturity = "production"
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updated_date = "2024/05/21"
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[rule]
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author = ["Elastic"]
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description = """
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Monitors for the creation of rule files that are used by systemd-udevd to manage device nodes and handle kernel device
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events in the Linux operating system. Systemd-udevd can be exploited for persistence by adversaries by creating
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malicious udev rules that trigger on specific events, executing arbitrary commands or payloads whenever a certain device
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is plugged in or recognized by the system.
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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 = "Potential Persistence Through Systemd-udevd"
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risk_score = 21
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rule_id = "054db96b-fd34-43b3-9af2-587b3bd33964"
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setup = """## 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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severity = "low"
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tags = [
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"Domain: Endpoint",
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"OS: Linux",
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"Use Case: Threat Detection",
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"Tactic: Persistence",
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"Data Source: Elastic Endgame",
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"Data Source: Elastic Defend",
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]
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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.category:"file" and
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event.type:("change" or "file_modify_event" or "creation" or "file_create_event") and
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file.path:/lib/udev/* and process.executable:* and not (
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process.name:("dockerd" or "docker" or "dpkg" or "dnf" or "dnf-automatic" or "yum" or "rpm" or "systemd-hwdb" or
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"podman" or "buildah") or file.extension : ("swp" or "swpx")
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)
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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 = "T1037"
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name = "Boot or Logon Initialization Scripts"
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reference = "https://attack.mitre.org/techniques/T1037/"
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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.new_terms]
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field = "new_terms_fields"
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value = ["host.id", "process.executable", "file.path"]
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[[rule.new_terms.history_window_start]]
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field = "history_window_start"
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value = "now-14d"
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