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>
67 lines
2.1 KiB
TOML
67 lines
2.1 KiB
TOML
[metadata]
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creation_date = "2023/07/10"
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integration = ["endpoint", "sentinel_one_cloud_funnel"]
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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 activity via built-in commands that read common
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system files. Adversaries may use these commands to gather information about the operating system, installed
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services, and hardware configuration 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.*", "endgame-*", "logs-sentinel_one_cloud_funnel.*",]
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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"
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risk_score = 21
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rule_id = "b81bd314-db5b-4d97-82e8-88e3e5fc9de5"
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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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"Data Source: Elastic Endgame",
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"Data Source: SentinelOne",
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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 or exec_event or start) and
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process.name:("cat" or "more" or "less" or "nano" or "vi" or "vim" or "vim.basic" or "emacs") and
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process.args:(
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"/etc/issue" or "/etc/os-release" or "/proc/version" or "/etc/profile" or "/proc/cpuinfo" or "/etc/services" or
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"/etc/lsb-release" or "/etc/redhat-release" or "/etc/debian_version" or "/etc/hostname"
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) and
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not process.parent.executable:("/usr/local/jamf/bin/jamf" or "/etc/cp/watchdog/cp-nano-watchdog")
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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", "process.command_line", "agent.id"]
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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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