osquery-defense-kit/detection/execution/exec-failed-launch-constraint-violation.sql
2023-04-27 12:00:08 -04:00

72 lines
2.3 KiB
SQL

-- Catch programs that failed to run due to a launch constraint violation, such as a signing issue.
--
-- references:
-- * https://attack.mitre.org/techniques/T1204/
--
-- interval: 900
-- platform: darwin
-- tags: filesystem events
SELECT
-- Child
pe.path AS p0_path,
s.authority AS p0_sauth,
s.identifier AS p0_sid,
hash.sha256 AS p0_hash,
REGEX_MATCH (pe.path, '.*/(.*)', 1) AS p0_name,
TRIM(pe.cmdline) AS p0_cmd,
p.cwd AS p0_cwd,
pe.pid AS p0_pid,
pe.euid AS p0_euid,
-- Parent
pe.parent AS p1_pid,
TRIM(COALESCE(p1.cmdline, pe1.cmdline)) AS p1_cmd,
COALESCE(p1.path, pe1.path) AS p1_path,
p1.cwd AS p1_cwd,
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,
TRIM(
COALESCE(p1_p2.cmdline, pe1_p2.cmdline, pe1_pe2.cmdline)
) AS p2_cmd,
p1_p2.cwd AS p2_cwd,
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 signature s ON pe.path = s.path
LEFT JOIN processes p ON pe.pid = p.pid
LEFT JOIN hash ON pe.path = hash.path
-- 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') -900)
AND pe.status = 1
AND pe.cmdline != ''
AND pe.cmdline IS NOT NULL
AND p0_cmd != '/opt/homebrew/opt/tailscale/bin/tailscaled'
GROUP BY
pe.euid,
pe.path,
pe.cmdline