Justin Ibarra
c1a0438f45
* replaced/removed all revoked/deprecated techniques * tests will fail on revoked (changed) techniques * tests will fail on deprecated techniques * tests will fail when techniques are mapped to an invalid tactic
71 lines
2.0 KiB
TOML
71 lines
2.0 KiB
TOML
[metadata]
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creation_date = "2020/04/24"
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maturity = "production"
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updated_date = "2020/12/09"
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[rule]
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author = ["Elastic"]
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description = """
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Kernel modules are pieces of code that can be loaded and unloaded into the kernel upon demand. They extend the
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functionality of the kernel without the need to reboot the system. This rule identifies attempts to remove a kernel
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module.
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"""
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false_positives = [
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"""
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There is usually no reason to remove modules, but some buggy modules require it. These can be exempted by username.
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Note that some Linux distributions are not built to support the removal of modules at all.
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""",
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]
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from = "now-9m"
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index = ["auditbeat-*", "logs-endpoint.events.*"]
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language = "kuery"
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license = "Elastic License"
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name = "Kernel Module Removal"
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references = ["http://man7.org/linux/man-pages/man8/modprobe.8.html"]
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risk_score = 73
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rule_id = "cd66a5af-e34b-4bb0-8931-57d0a043f2ef"
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severity = "high"
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tags = ["Elastic", "Host", "Linux", "Threat Detection", "Defense Evasion"]
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type = "query"
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query = '''
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event.category:process and event.type:(start or process_started) and
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process.args:((rmmod and sudo) or (modprobe and sudo and ("--remove" or "-r")))
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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 = "T1562"
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name = "Impair Defenses"
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reference = "https://attack.mitre.org/techniques/T1562/"
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[[rule.threat.technique.subtechnique]]
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id = "T1562.001"
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name = "Disable or Modify Tools"
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reference = "https://attack.mitre.org/techniques/T1562/001/"
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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]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1547"
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name = "Boot or Logon Autostart Execution"
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reference = "https://attack.mitre.org/techniques/T1547/"
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[[rule.threat.technique.subtechnique]]
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id = "T1547.006"
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name = "Kernel Modules and Extensions"
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reference = "https://attack.mitre.org/techniques/T1547/006/"
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[rule.threat.tactic]
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id = "TA0003"
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name = "Persistence"
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reference = "https://attack.mitre.org/tactics/TA0003/"
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