mirror of
https://github.com/chainguard-dev/osquery-defense-kit
synced 2024-12-25 07:12:05 +00:00
74 lines
2.6 KiB
SQL
74 lines
2.6 KiB
SQL
-- Find setuid process events with large environment sizes
|
|
--
|
|
-- ******************************************************************
|
|
-- NOTE: This is a rare case of a non-working query. It does not work
|
|
-- in my environment (osquery 5.5.1 running with Kolide) as
|
|
-- process_events.env_size is NULL. I believe this to be a bug, but
|
|
-- requires more investigation.
|
|
-- ******************************************************************
|
|
--
|
|
-- tags: events process escalation disabled seldom
|
|
-- platform: posix
|
|
--
|
|
-- Uncomment once the underlying problem is addressed:
|
|
-- interval: 60
|
|
SELECT
|
|
file.mode AS p0_binary_mode,
|
|
pe.env AS p0_env,
|
|
pe.time AS p0_time,
|
|
pe.env_size AS p0_env_size,
|
|
-- Child
|
|
pe.path AS p0_path,
|
|
REGEX_MATCH (pe.path, '.*/(.*)', 1) AS p0_name,
|
|
TRIM(pe.cmdline) AS p0_cmd,
|
|
pe.euid AS p0_euid,
|
|
pe.cwd AS p0_cwd,
|
|
pe.pid AS p0_pid,
|
|
p.cgroup_path AS p0_cgroup,
|
|
-- Parent
|
|
pe.parent AS p1_pid,
|
|
p1.cgroup_path AS p1_cgroup,
|
|
TRIM(COALESCE(p1.cmdline, pe1.cmdline)) AS p1_cmd,
|
|
COALESCE(p1.path, pe1.path) AS p1_path,
|
|
COALESCE(p_hash1.sha256, pe_hash1.sha256) AS p1_hash,
|
|
REGEX_MATCH (COALESCE(p1.path, pe1.path), '.*/(.*)', 1) AS p1_name,
|
|
-- Grandparent
|
|
COALESCE(p1.parent, pe1.parent) AS p2_pid,
|
|
COALESCE(p1_p2.cgroup_path, pe1_p2.cgroup_path) AS p2_cgroup,
|
|
TRIM(
|
|
COALESCE(p1_p2.cmdline, pe1_p2.cmdline, pe1_pe2.cmdline)
|
|
) AS p2_cmd,
|
|
COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path) AS p2_path,
|
|
COALESCE(
|
|
p1_p2_hash.path,
|
|
pe1_p2_hash.path,
|
|
pe1_pe2_hash.path
|
|
) AS p2_hash,
|
|
REGEX_MATCH (
|
|
COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path),
|
|
'.*/(.*)',
|
|
1
|
|
) AS p2_name
|
|
FROM
|
|
process_events pe
|
|
LEFT JOIN file ON pe.path = file.path
|
|
LEFT JOIN processes p ON pe.pid = p.pid
|
|
-- Parents (via two paths)
|
|
LEFT JOIN processes p1 ON pe.parent = p1.pid
|
|
LEFT JOIN hash p_hash1 ON p1.path = p_hash1.path
|
|
LEFT JOIN process_events pe1 ON pe.parent = pe1.pid
|
|
AND pe1.cmdline != ''
|
|
LEFT JOIN hash pe_hash1 ON pe1.path = pe_hash1.path
|
|
-- Grandparents (via 3 paths)
|
|
LEFT JOIN processes p1_p2 ON p1.parent = p1_p2.pid -- Current grandparent via parent processes
|
|
LEFT JOIN processes pe1_p2 ON pe1.parent = pe1_p2.pid -- Current grandparent via parent events
|
|
LEFT JOIN process_events pe1_pe2 ON pe1.parent = pe1_p2.pid
|
|
AND pe1_pe2.cmdline != '' -- Past grandparent via parent events
|
|
LEFT JOIN hash p1_p2_hash ON p1_p2.path = p1_p2_hash.path
|
|
LEFT JOIN hash pe1_p2_hash ON pe1_p2.path = pe1_p2_hash.path
|
|
LEFT JOIN hash pe1_pe2_hash ON pe1_pe2.path = pe1_pe2_hash.path
|
|
WHERE
|
|
pe.time > (strftime('%s', 'now') -60)
|
|
AND file.mode NOT LIKE '0%'
|
|
AND pe.env_size > 3500
|