Relative Exec Low Uid Events
osquery
Programs running as root with a relative path (event-based)
Description
ODK (osquery-defense-kit) is unique in that the queries are designed to be used as part of a production detection & response pipeline. The detection queries are formulated to return zero rows during normal expected behavior, so that they may be configured to generate alerts when rows are returned.
Query
-- Programs running as root with a relative path (event-based)
--
-- references:
-- * https://www.microsoft.com/en-us/security/blog/2022/12/21/microsoft-research-uncovers-new-zerobot-capabilities/
--
-- platform: posix
-- interval: 180
-- tags: process events
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,
pe.time AS p0_time,
pe.time AS p0_time,
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,
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') -180)
AND pe.cmdline != ''
AND pe.euid < 500
AND pe.cmdline LIKE './%'
AND p0_cmd NOT IN (
'./configure',
'./conftest',
'./ksinstall --install=Keystone.tbz',
'./podinfo --port=9898 --port-metrics=9797 --grpc-port=9999 --grpc-service-name=podinfo --level=info --random-delay=false --random-error=false'
)
AND p0_cmd NOT LIKE './out/osqtool-% %'
AND p0_cmd NOT LIKE './tools/bpf/resolve_btfids/resolve_btfids -b vmlinux /var/lib/dkms/%'
AND p0_cmd NOT LIKE './tools/objtool/objtool%--hacks%'
AND p0_cmd NOT LIKE './updater -insecure https://10.%:9174/check-update/macos'
AND p0_path NOT LIKE '/private/tmp/PKInstallSandbox.%/Scripts/com.microsoft.OneDrive.%/OneDrivePkgTelemetry'
AND NOT p0_cgroup LIKE '/system.slice/docker-%'tags: SStagSS