87 lines
2.4 KiB
TOML
87 lines
2.4 KiB
TOML
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[metadata]
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creation_date = "2023/10/18"
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integration = ["endpoint"]
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maturity = "production"
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min_stack_comments = "Multiple field support in the New Terms rule type was added in Elastic 8.6"
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min_stack_version = "8.6.0"
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updated_date = "2023/10/18"
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[rule]
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author = ["Elastic"]
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description = """
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This rule monitors for network connections from a kworker process. kworker, or kernel worker, processes are part of the
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kernel's workqueue mechanism. They are responsible for executing work that has been scheduled to be done in kernel
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space, which might include tasks like handling interrupts, background activities, and other kernel-related tasks.
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Attackers may attempt to evade detection by masquerading as a kernel worker process.
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"""
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from = "now-60m"
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index = ["logs-endpoint.events.*"]
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language = "kuery"
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license = "Elastic License v2"
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name = "Network Activity Detected via Kworker"
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risk_score = 21
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rule_id = "25d917c4-aa3c-4111-974c-286c0312ff95"
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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: Command and Control",
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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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host.os.type:linux and event.category:network and event.action:(connection_attempted or connection_accepted) and
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process.name:kworker*
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[rule.threat.tactic]
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id = "TA0011"
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name = "Command and Control"
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reference = "https://attack.mitre.org/tactics/TA0011/"
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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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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[[rule.threat.technique]]
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name = "Masquerading"
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id = "T1036"
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reference = "https://attack.mitre.org/techniques/T1036/"
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[[rule.threat.technique]]
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name = "Rootkit"
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id = "T1014"
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reference = "https://attack.mitre.org/techniques/T1014/"
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[rule.threat.tactic]
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id = "TA0010"
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name = "Exfiltration"
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reference = "https://attack.mitre.org/tactics/TA0010/"
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[[rule.threat.technique]]
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name = "Exfiltration Over C2 Channel"
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id = "T1041"
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reference = "https://attack.mitre.org/techniques/T1041/"
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[rule.new_terms]
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field = "new_terms_fields"
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value = ["destination.ip", "process.name", "host.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-14d"
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