Ruben Groenewoud
95 lines
3.6 KiB
TOML
95 lines
3.6 KiB
TOML
[metadata]
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creation_date = "2024/12/17"
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integration = ["endpoint"]
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maturity = "production"
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updated_date = "2024/12/17"
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[rule]
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author = ["Elastic"]
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description = """
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This rule detects the creation of Loadable Kernel Module (LKM) configuration files. Attackers may create or modify these
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files to allow their LKMs to be loaded upon reboot, ensuring persistence on a compromised system.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.file*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Loadable Kernel Module Configuration File Creation"
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risk_score = 21
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rule_id = "6e2355cc-c60a-4d92-a80c-e54a45ad2400"
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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: Persistence",
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"Tactic: Defense Evasion",
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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 = "eql"
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query = '''
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file where host.os.type == "linux" and event.action in ("rename", "creation") and process.executable != null and
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file.path like~ (
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"/etc/modules", "/etc/modprobe.d/*", "/usr/lib/modprobe.d/*", "/etc/modules-load.d/*",
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"/run/modules-load.d/*", "/usr/local/lib/modules-load.d/*", "/usr/lib/modules-load.d/*"
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) and not (
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process.executable in (
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"/bin/dpkg", "/usr/bin/dpkg", "/bin/dockerd", "/usr/bin/dockerd", "/usr/sbin/dockerd", "/bin/microdnf",
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"/usr/bin/microdnf", "/bin/rpm", "/usr/bin/rpm", "/bin/snapd", "/usr/bin/snapd", "/bin/yum", "/usr/bin/yum",
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"/bin/dnf", "/usr/bin/dnf", "/bin/podman", "/usr/bin/podman", "/bin/dnf-automatic", "/usr/bin/dnf-automatic",
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"/bin/pacman", "/usr/bin/pacman", "/usr/bin/dpkg-divert", "/bin/dpkg-divert", "/sbin/apk", "/usr/sbin/apk",
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"/usr/local/sbin/apk", "/usr/bin/apt", "/usr/sbin/pacman", "/bin/podman", "/usr/bin/podman", "/usr/bin/puppet",
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"/bin/puppet", "/opt/puppetlabs/puppet/bin/puppet", "/usr/bin/chef-client", "/bin/chef-client",
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"/bin/autossl_check", "/usr/bin/autossl_check", "/proc/self/exe", "/dev/fd/*", "/usr/bin/pamac-daemon",
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"/bin/pamac-daemon", "/usr/local/bin/dockerd", "/opt/elasticbeanstalk/bin/platform-engine",
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"/opt/puppetlabs/puppet/bin/ruby", "/usr/libexec/platform-python", "/opt/imunify360/venv/bin/python3",
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"/opt/eset/efs/lib/utild", "/usr/sbin/anacron", "/usr/bin/podman", "/kaniko/kaniko-executor", "/usr/bin/prime-select"
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) or
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file.extension in ("swp", "swpx", "swx", "dpkg-remove") or
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file.Ext.original.extension == "dpkg-new" or
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process.executable like (
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"/nix/store/*", "/var/lib/dpkg/info/kmod.postinst", "/tmp/vmis.*", "/snap/*", "/dev/fd/*",
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"/usr/libexec/platform-python*"
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) or
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process.executable == null or
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process.name in (
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"crond", "executor", "puppet", "droplet-agent.postinst", "cf-agent", "schedd", "imunify-notifier", "perl",
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"jumpcloud-agent", "crio", "dnf_install", "utild"
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) or
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(process.name == "sed" and file.name : "sed*") or
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(process.name == "perl" and file.name : "e2scrub_all.tmp*")
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)
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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 = "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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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1014"
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name = "Rootkit"
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reference = "https://attack.mitre.org/techniques/T1014/"
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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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