mirror of
https://github.com/chainguard-dev/osquery-defense-kit
synced 2024-12-14 10:04:40 +00:00
46 lines
1.4 KiB
SQL
46 lines
1.4 KiB
SQL
-- Applications setting environment variables to bypass security protections
|
|
--
|
|
-- Inpsired by BPFdoor and other intrusions
|
|
-- https://www.sandflysecurity.com/blog/compromised-linux-cheat-sheet/
|
|
--
|
|
-- WARNING: This query is known to require a higher than average wall time.
|
|
--
|
|
-- interval: 30
|
|
-- platform: darwin
|
|
SELECT
|
|
key,
|
|
value,
|
|
p.pid,
|
|
p.path,
|
|
p.cwd,
|
|
p.cmdline,
|
|
p.parent AS parent_pid,
|
|
pp.cmdline AS parent_cmd
|
|
-- Querying processes first and filtering by time gives a massive 20X speed improvement
|
|
-- over querying process_envs first and JOIN'ing against processes
|
|
FROM
|
|
processes p
|
|
LEFT JOIN process_envs pe ON p.pid = pe.pid
|
|
LEFT JOIN processes pp ON p.parent = pp.pid
|
|
WHERE -- This time should match the interval
|
|
p.start_time > (strftime('%s', 'now') - 20)
|
|
AND (
|
|
key = 'HISTFILE'
|
|
AND NOT VALUE LIKE '/Users/%/.%_history'
|
|
)
|
|
OR (
|
|
key = 'LD_PRELOAD'
|
|
AND NOT p.path LIKE '%/firefox'
|
|
AND NOT pe.value = 'libfakeroot.so'
|
|
AND NOT pe.value LIKE 'libmozsandbox.so%'
|
|
AND NOT pe.value LIKE ':/snap/%' -- Yes, on macOS (emote)
|
|
)
|
|
OR (
|
|
key = 'DYLD_INSERT_LIBRARIES' -- actively exploited on programs which disable library security
|
|
AND NOT pe.value = '/System/Library/PrivateFrameworks/PreviewsInjection.framework/PreviewsInjection'
|
|
AND NOT pe.value LIKE '/opt/homebrew/Cellar/r/4.%/lib/R/lib/libR.dylib'
|
|
)
|
|
OR (
|
|
key = 'DYLD_FRAMEWORK_PATH' -- sort of obsolete, but may affect SIP abusers
|
|
)
|