mirror of
https://github.com/chainguard-dev/osquery-defense-kit
synced 2025-01-23 22:02:44 +00:00
69 lines
2.1 KiB
SQL
69 lines
2.1 KiB
SQL
-- Unexpected calls to sysctl (event-based)
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--
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-- refs:
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-- * https://attack.mitre.org/techniques/T1497/001/ (Virtualization/Sandbox Evasion: System Checks)
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--
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-- platform: posix
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-- interval: 900
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SELECT
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pe.path AS child_path,
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pe.cwd AS child_cwd,
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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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p.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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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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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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pe.time > (strftime('%s', 'now') -900)
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AND pe.path IN ('/usr/bin/sysctl', '/sbin/sysctl', '/usr/sbin/sysctl')
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AND NOT child_cmd IN (
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'sysctl -n hw.optional.arm64',
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'/usr/sbin/sysctl -n hw.cputype',
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'sysctl.proc_translated'
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)
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GROUP BY
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pe.pid
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