mirror of
https://github.com/chainguard-dev/osquery-defense-kit
synced 2025-02-09 05:56:54 +00:00
93 lines
2.9 KiB
SQL
93 lines
2.9 KiB
SQL
-- Suspicious calls to systemctl(event-based)
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--
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-- refs:
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-- * https://attack.mitre.org/techniques/T1543/002/ (Create or Modify System Process: Systemd Service)
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--
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-- tags: transient process state often
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-- platform: linux
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-- interval: 300
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SELECT
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pe.path AS child_path,
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REGEX_MATCH (pe.path, '.*/(.*)', 1) AS child_name,
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TRIM(pe.cmdline) AS child_cmd,
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pe.pid AS child_pid,
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p.cgroup_path AS child_cgroup,
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pe.parent AS parent_pid,
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TRIM(IIF(pp.cmdline != NULL, pp.cmdline, ppe.cmdline)) AS parent_cmd,
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TRIM(IIF(pp.path != NULL, pp.path, ppe.path)) AS parent_path,
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IIF(pp.path != NULL, phash.sha256, pehash.sha256) AS parent_hash,
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REGEX_MATCH (
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IIF(pp.path != NULL, pp.path, ppe.path),
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'.*/(.*)',
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1
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) AS parent_name,
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TRIM(IIF(gp.cmdline != NULL, gp.cmdline, gpe.cmdline)) AS gparent_cmd,
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TRIM(IIF(gp.path != NULL, gp.path, gpe.path)) AS gparent_path,
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IIF(gp.path != NULL, gphash.sha256, gpehash.path) AS gparent_hash,
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REGEX_MATCH (
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IIF(gp.path != NULL, gp.path, gpe.path),
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'.*/(.*)',
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1
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) AS gparent_name,
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IIF(pp.parent != NULL, pp.parent, ppe.parent) AS gparent_pid,
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CONCAT (
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REGEX_MATCH (pe.path, '.*/(.*)', 1),
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',',
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MIN(pe.euid, 500),
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',',
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REGEX_MATCH (
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IIF(pp.path != NULL, pp.path, ppe.path),
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'.*/(.*)',
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1
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),
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',',
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REGEX_MATCH (
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IIF(gp.path != NULL, gp.path, gpe.path),
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'.*/(.*)',
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1
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)
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) AS exception_key
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FROM
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process_events pe,
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uptime
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LEFT JOIN processes p ON pe.pid = p.pid
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LEFT JOIN processes pp ON pe.parent = pp.pid
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LEFT JOIN hash phash ON pp.path = phash.path
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LEFT JOIN process_events ppe ON pe.parent = ppe.pid
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LEFT JOIN hash pehash ON ppe.path = pehash.path
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LEFT JOIN processes gp ON gp.pid = pp.parent
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LEFT JOIN hash gphash ON gp.path = gphash.path
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LEFT JOIN process_events gpe ON ppe.parent = gpe.pid
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LEFT JOIN hash gpehash ON gpe.path = gpehash.path
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WHERE
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uptime.total_seconds > 30
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-- NOTE: The remainder of this query is synced with unexpected-fetcher-parents
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AND pe.path IN (
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'/usr/bin/systemctl',
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'/bin/systemctl',
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'/sbin/systemctl'
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)
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AND pe.time > (strftime('%s', 'now') -300) -- Ignore partial table joins
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AND NOT exception_key IN (
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'systemctl,0,apt-helper,',
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'systemctl,500,systemd,',
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'systemctl,0,dash,logrotate',
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'systemctl,0,,containerd-shim-runc-v2'
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)
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AND NOT child_cmd IN (
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'systemctl status kubelet',
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'systemctl restart cups.service',
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'systemctl --user import-environment DISPLAY XAUTHORITY',
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'systemctl -p LoadState show cups.service',
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'systemctl --quiet is-enabled cups.service',
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'systemctl stop kubelet',
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'/sbin/runlevel'
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)
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-- apt-helper form
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AND NOT child_cmd LIKE 'systemctl is-active -q %.service'
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AND NOT child_cmd LIKE 'systemctl show --property=%'
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AND NOT child_cmd LIKE 'systemctl % snap-kubectl-%.mount'
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AND NOT child_cmd LIKE '/usr/bin/systemctl --user set-environment DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/%/bus'
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GROUP BY
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pe.pid
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