Ruben Groenewoud
a1716bd673
* [Rule Tuning] Several rule tunings * Added 1 more * optimized ransomware encryption rules * Update rules/linux/impact_potential_linux_ransomware_file_encryption.toml * Update rules/linux/impact_potential_linux_ransomware_note_detected.toml * Added 2 more tunings based on todays telemetry * Some tunings * Tuning * Tuning * fixed user.id comparison * Something went wrong with deprecation * Something went wrong with deprecation * Update rules/linux/impact_potential_linux_ransomware_file_encryption.toml * Update rules/linux/discovery_linux_nping_activity.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Update rules/linux/discovery_linux_hping_activity.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Dedeprecated the rule to deprecate later --------- Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
62 lines
2.0 KiB
TOML
62 lines
2.0 KiB
TOML
[metadata]
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creation_date = "2020/04/23"
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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 = "2023/08/24"
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[rule]
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author = ["Elastic"]
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description = """
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Loadable Kernel Modules (or LKMs) are pieces of code that can be loaded and unloaded into the kernel upon demand. They
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extend the functionality of the kernel without the need to reboot the system. This identifies attempts to enumerate
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information about a kernel module.
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"""
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false_positives = [
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"""
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Security tools and device drivers may run these programs in order to enumerate kernel modules. Use of these programs
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by ordinary users is uncommon. These can be exempted by process name or username.
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""",
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]
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from = "now-9m"
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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 = "Enumeration of Kernel Modules"
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risk_score = 47
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rule_id = "2d8043ed-5bda-4caf-801c-c1feb7410504"
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severity = "medium"
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tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Discovery"]
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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 (
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(process.name:(lsmod or modinfo)) or
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(process.name:kmod and process.args:list) or
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(process.name:depmod and process.args:(--all or -a))
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) and process.parent.name:(sudo or bash or dash or ash or sh or tcsh or csh or zsh or ksh or fish) and
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not process.parent.user.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 = "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.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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