Jonhnathan
b4c84e8a40
* Update Tags * Bump updated date separately to be easy to revert if needed * Update resource_development_ml_linux_anomalous_compiler_activity.toml * Apply changes from the discussion * Update persistence_init_d_file_creation.toml * Update defense_evasion_timestomp_sysmon.toml * Update defense_evasion_application_removed_from_blocklist_in_google_workspace.toml * Update missing Tactic tags * Update unit tests to match new tags * Add missing IG tags * Delete okta_threat_detected_by_okta_threatinsight.toml * Update command_and_control_google_drive_malicious_file_download.toml * Update persistence_rc_script_creation.toml * Mass bump * Update persistence_shell_activity_by_web_server.toml * . --------- Co-authored-by: Mika Ayenson <Mika.ayenson@elastic.co> Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
70 lines
3.1 KiB
TOML
70 lines
3.1 KiB
TOML
[metadata]
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creation_date = "2020/04/12"
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integration = ["auditd_manager"]
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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 = "2023/06/12"
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[rule]
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author = ["Elastic"]
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description = """
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Loadable Kernel Modules (or LKMs) are pieces of code that can be loaded and unloaded into the kernel upon demand. They
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extend the functionality of the kernel without the need to reboot the system. This identifies attempts to enumerate
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information about a kernel module using the /proc/modules filesystem. This filesystem is used by utilities such as
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lsmod and kmod to list the available kernel modules.
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"""
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false_positives = [
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"""
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Security tools and device drivers may run these programs in order to enumerate kernel modules. Use of these programs
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by ordinary users is uncommon. These can be exempted by process name or username.
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""",
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]
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from = "now-9m"
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index = ["auditbeat-*", "logs-auditd_manager.auditd-*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Enumeration of Kernel Modules via Proc"
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note = """## Setup
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This rule requires the use of the `auditd_manager` integration. `Auditd_manager` is a tool designed to simplify and enhance the management of the audit subsystem in Linux systems. It provides a user-friendly interface and automation capabilities for configuring and monitoring system auditing through the auditd daemon. With `auditd_manager`, administrators can easily define audit rules, track system events, and generate comprehensive audit reports, improving overall security and compliance in the system. The following steps should be executed in order to install and deploy `auditd_manager` on a Linux system.
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```
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Kibana -->
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Management -->
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Integrations -->
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Auditd Manager -->
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Add Auditd Manager
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```
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`Auditd_manager` subscribes to the kernel and receives events as they occur without any additional configuration. However, if more advanced configuration is required to detect specific behavior, audit rules can be added to the integration in either the "audit rules" configuration box or the "auditd rule files" box by specifying a file to read the audit rules from.
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For this detection rule to trigger, the following additional audit rules are required to be added to the integration:
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```
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-w /proc/ -p r -k audit_proc
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```
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Add the newly installed `auditd manager` to an agent policy, and deploy the agent on a Linux system from which auditd log files are desirable.
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"""
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risk_score = 47
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rule_id = "80084fa9-8677-4453-8680-b891d3c0c778"
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severity = "medium"
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tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Discovery"]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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file where host.os.type == "linux" and event.action == "opened-file" and
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file.path == "/proc/modules" and not process.parent.pid == 1
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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 = "T1082"
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name = "System Information Discovery"
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reference = "https://attack.mitre.org/techniques/T1082/"
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[rule.threat.tactic]
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id = "TA0007"
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name = "Discovery"
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reference = "https://attack.mitre.org/tactics/TA0007/"
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