Ruben Groenewoud
ba6952c242
* [Rule Tuning] 2 tunings to reduce FPs back to 0
* Added one more tune for community issue #3041
* Update rules/linux/execution_abnormal_process_id_file_created.toml
* Update rules/linux/execution_abnormal_process_id_file_created.toml
(cherry picked from commit 3588600d57)
53 lines
2.0 KiB
TOML
53 lines
2.0 KiB
TOML
[metadata]
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creation_date = "2023/08/30"
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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 = "2023/08/30"
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[rule]
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author = ["Elastic"]
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description = """
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This rule monitors for the usage of the built-in Linux DebugFS utility to access a disk device without root permissions.
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Linux users that are part of the "disk" group have sufficient privileges to access all data inside of the machine through
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DebugFS. Attackers may leverage DebugFS in conjunction with "disk" permissions to read sensitive files owned by root,
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such as the shadow file, root ssh private keys or other sensitive files that may allow them to further escalate
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privileges.
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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 = "eql"
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license = "Elastic License v2"
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name = "Potential Suspicious DebugFS Root Device Access"
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references = ["https://book.hacktricks.xyz/linux-hardening/privilege-escalation/interesting-groups-linux-pe#disk-group"]
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risk_score = 21
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rule_id = "2605aa59-29ac-4662-afad-8d86257c7c91"
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severity = "low"
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tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Privilege Escalation", "Data Source: Elastic Endgame"]
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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 event.action in ("exec", "exec_event") and event.type == "start" and
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process.name == "debugfs" and process.args : "/dev/sd*" and not process.args == "-R" and
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not user.Ext.real.id == "0" and not group.Ext.real.id == "0"
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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 = "T1078"
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name = "Valid Accounts"
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reference = "https://attack.mitre.org/techniques/T1078/"
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[[rule.threat.technique.subtechnique]]
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id = "T1078.003"
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name = "Local Accounts"
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reference = "https://attack.mitre.org/techniques/T1078/003/"
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[rule.threat.tactic]
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id = "TA0004"
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name = "Privilege Escalation"
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reference = "https://attack.mitre.org/tactics/TA0004/"
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