81 lines
2.6 KiB
SQL
81 lines
2.6 KiB
SQL
-- Unexpected calls to sysctl (event-based)
|
|
--
|
|
-- refs:
|
|
-- * https://attack.mitre.org/techniques/T1497/001/ (Virtualization/Sandbox Evasion: System Checks)
|
|
--
|
|
-- platform: linux
|
|
-- interval: 600
|
|
SELECT
|
|
-- Child
|
|
pe.path AS p0_path,
|
|
REGEX_MATCH (pe.path, '.*/(.*)', 1) AS p0_name,
|
|
TRIM(pe.cmdline) AS p0_cmd,
|
|
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,
|
|
-- Exception key
|
|
REGEX_MATCH (pe.path, '.*/(.*)', 1) || ',' || MIN(pe.euid, 500) || ',' || REGEX_MATCH (COALESCE(p1.path, pe1.path), '.*/(.*)', 1) || ',' || REGEX_MATCH (
|
|
COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path),
|
|
'.*/(.*)',
|
|
1
|
|
) AS exception_key
|
|
FROM
|
|
process_events pe,
|
|
uptime
|
|
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') -600)
|
|
AND pe.cmdline != ''
|
|
AND pe.path IN (
|
|
'/usr/bin/sysctl',
|
|
'/sbin/sysctl',
|
|
'/usr/sbin/sysctl',
|
|
'/usr/bin/chattr',
|
|
'/sbin/chattr',
|
|
'/usr/sbin/chattr',
|
|
'/usr/bin/setenforce',
|
|
'/sbin/setenforce',
|
|
'/usr/sbin/setenforce'
|
|
)
|
|
AND p.parent > 0
|
|
GROUP BY
|
|
pe.pid
|