74 lines
2.6 KiB
SQL
74 lines
2.6 KiB
SQL
-- Find setuid process events with large environment sizes
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--
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-- ******************************************************************
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-- NOTE: This is a rare case of a non-working query. It does not work
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-- in my environment (osquery 5.5.1 running with Kolide) as
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-- process_events.env_size is NULL. I believe this to be a bug, but
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-- requires more investigation.
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-- ******************************************************************
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--
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-- tags: events process escalation disabled seldom
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-- platform: posix
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--
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-- Uncomment once the underlying problem is addressed:
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-- interval: 60
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SELECT
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file.mode AS p0_binary_mode,
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pe.env AS p0_env,
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pe.time AS p0_time,
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pe.env_size AS p0_env_size,
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-- Child
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pe.path AS p0_path,
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REGEX_MATCH (pe.path, '.*/(.*)', 1) AS p0_name,
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TRIM(pe.cmdline) AS p0_cmd,
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pe.euid AS p0_euid,
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pe.cwd AS p0_cwd,
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pe.pid AS p0_pid,
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p.cgroup_path AS p0_cgroup,
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-- Parent
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pe.parent AS p1_pid,
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p1.cgroup_path AS p1_cgroup,
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TRIM(COALESCE(p1.cmdline, pe1.cmdline)) AS p1_cmd,
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COALESCE(p1.path, pe1.path) AS p1_path,
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COALESCE(p_hash1.sha256, pe_hash1.sha256) AS p1_hash,
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REGEX_MATCH (COALESCE(p1.path, pe1.path), '.*/(.*)', 1) AS p1_name,
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-- Grandparent
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COALESCE(p1.parent, pe1.parent) AS p2_pid,
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COALESCE(p1_p2.cgroup_path, pe1_p2.cgroup_path) AS p2_cgroup,
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TRIM(
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COALESCE(p1_p2.cmdline, pe1_p2.cmdline, pe1_pe2.cmdline)
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) AS p2_cmd,
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COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path) AS p2_path,
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COALESCE(
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p1_p2_hash.path,
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pe1_p2_hash.path,
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pe1_pe2_hash.path
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) AS p2_hash,
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REGEX_MATCH (
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COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path),
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'.*/(.*)',
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1
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) AS p2_name
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FROM
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process_events pe
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LEFT JOIN file ON pe.path = file.path
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LEFT JOIN processes p ON pe.pid = p.pid
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-- Parents (via two paths)
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LEFT JOIN processes p1 ON pe.parent = p1.pid
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LEFT JOIN hash p_hash1 ON p1.path = p_hash1.path
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LEFT JOIN process_events pe1 ON pe.parent = pe1.pid
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AND pe1.cmdline != ''
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LEFT JOIN hash pe_hash1 ON pe1.path = pe_hash1.path
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-- Grandparents (via 3 paths)
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LEFT JOIN processes p1_p2 ON p1.parent = p1_p2.pid -- Current grandparent via parent processes
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LEFT JOIN processes pe1_p2 ON pe1.parent = pe1_p2.pid -- Current grandparent via parent events
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LEFT JOIN process_events pe1_pe2 ON pe1.parent = pe1_p2.pid
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AND pe1_pe2.cmdline != '' -- Past grandparent via parent events
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LEFT JOIN hash p1_p2_hash ON p1_p2.path = p1_p2_hash.path
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LEFT JOIN hash pe1_p2_hash ON pe1_p2.path = pe1_p2_hash.path
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LEFT JOIN hash pe1_pe2_hash ON pe1_pe2.path = pe1_pe2_hash.path
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WHERE
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pe.time > (strftime('%s', 'now') -60)
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AND file.mode NOT LIKE '0%'
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AND pe.env_size > 3500
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