Ruben Groenewoud
38e2e4766f
* [Rule Tuning] Linux DR BBR Tuning * Update discovery_getconf_execution.toml * Fix typo in process.args for dscl command * Update persistence_web_server_sus_file_creation.toml --------- Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
75 lines
2.5 KiB
TOML
75 lines
2.5 KiB
TOML
[metadata]
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creation_date = "2025/01/07"
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integration = ["endpoint"]
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maturity = "production"
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updated_date = "2025/12/24"
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[rule]
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author = ["Elastic"]
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building_block_type = "default"
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description = """
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This rule identifies Linux system information discovery via the "getconf" command. The "getconf" command is used to query system configuration
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variables and system limits. Adversaries may use this command to gather information about the system, such as the page size, maximum number
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of open files, and other system limits, to aid in further exploration and exploitation of the system.
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"""
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from = "now-119m"
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index = ["logs-endpoint.events.process*"]
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interval = "60m"
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language = "kuery"
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license = "Elastic License v2"
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name = "Linux System Information Discovery via Getconf"
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references = ["https://blog.exatrack.com/Perfctl-using-portainer-and-new-persistences/"]
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risk_score = 21
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rule_id = "90e5976d-ed8c-489a-a293-bfc57ff8ba89"
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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: Discovery",
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"Rule Type: BBR",
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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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event.category:process and host.os.type:linux and event.type:start and event.action:exec and process.name:getconf and not (
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process.parent.executable:(
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"/usr/bin/google_guest_agent_manager" or "/opt/commvault/Base64/cvlaunchd" or /usr/local/manageengine/uems_agent/bin/*
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) or
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process.working_directory:(
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"/opt/oracle/mgmt_agent/agent_inst/bin" or "/var/lib/oracle-cloud-agent/plugins/oci-managementagent/polaris" or
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"/opt/commvault/Base/cvlaunchd" or "/opt/simpana" or "/opt/commvault" or "/opt/ITSPlatform/agentcore" or
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"/u01/app/oracle/EMBase/agent_inst/sysman/emd" or "/opt/abacus/lib"
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) or
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process.parent.args:(
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/opt/oracle/mgmt_agent/agent_inst/* or "/opt/datadog-agent/bin/agent/agent" or "/usr/bin/byobu-status" or
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"/usr/local/nagios/libexec/check_ssl_cert" or "/usr/lib64/nagios/plugins/cpanel/check_ssl_cert"
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) or
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process.parent.command_line:(
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"/bin/sh -s unix:cmd" or "ruby /usr/local/bundle/bin/bundle exec rackup"
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)
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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 = "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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[rule.new_terms]
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field = "new_terms_fields"
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value = ["process.parent.executable"]
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[[rule.new_terms.history_window_start]]
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field = "history_window_start"
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value = "now-5d"
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