shashank-elastic
78 lines
4.0 KiB
TOML
78 lines
4.0 KiB
TOML
[metadata]
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creation_date = "2023/04/11"
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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"
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min_stack_version = "8.3.0"
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updated_date = "2023/10/13"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies the execution of mount process with hidepid parameter, which can make processes invisible to
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other users from the system. Adversaries using Linux kernel version 3.2+ (or RHEL/CentOS v6.5+ above) can hide
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the process from other users. When hidepid=2 option is executed to mount the /proc filesystem, only the root user
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can see all processes and the logged-in user can only see their own process. This provides a defense evasion mechanism for
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the adversaries to hide their process executions from all other commands such as ps, top, pgrep and more.
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With the Linux kernel hardening hidepid option all the user has to do is remount the /proc filesystem with the option,
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which can now be monitored and detected.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Potential Hidden Process via Mount Hidepid"
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references = [
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"https://www.cyberciti.biz/faq/linux-hide-processes-from-other-users/",
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]
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risk_score = 47
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rule_id = "dc71c186-9fe4-4437-a4d0-85ebb32b8204"
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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 = "medium"
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tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Data Source: Elastic Defend"]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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process where host.os.type == "linux" and process.name == "mount" and event.action == "exec" and
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process.args == "/proc" and process.args == "-o" and process.args : "*hidepid=2*"
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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 = "T1564"
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name = "Hide Artifacts"
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reference = "https://attack.mitre.org/techniques/T1564/"
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[rule.threat.tactic]
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id = "TA0005"
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name = "Defense Evasion"
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reference = "https://attack.mitre.org/tactics/TA0005/"
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