osquery-defense-kit/detection/persistence/unexpected-small-udev-entry...

62 lines
2.1 KiB
SQL

-- Unexpected small udev rule entries
--
-- Typically vendor-provided udev rules are more verbose.
--
-- references:
-- * https://documents.trendmicro.com/assets/white_papers/wp-operation-earth-berberoka.pdf
-- * https://attack.mitre.org/techniques/T1547/ (Boot or Logon Autostart Execution)
--
-- false positives:
-- * rules installed by 3rd party software
--
-- tags: persistent filesystem state
-- platform: linux
SELECT
file.path,
uid,
gid,
mode,
mtime,
ctime,
type,
size,
hash.sha256,
magic.data
FROM
file
LEFT JOIN hash ON file.path = hash.path
LEFT JOIN magic ON file.path = magic.path
WHERE
file.path LIKE '/usr/lib/udev/rules.d/%'
AND file.size < 180
AND file.path NOT IN (
'/usr/lib/udev/rules.d/50-apport.rules',
'/usr/lib/udev/rules.d/60-net.rules',
'/usr/lib/udev/rules.d/60-rfkill.rules',
'/usr/lib/udev/rules.d/61-mutter.rules',
'/usr/lib/udev/rules.d/66-saned.rules',
'/usr/lib/udev/rules.d/70-hypervfcopy.rules',
'/usr/lib/udev/rules.d/70-hypervkvp.rules',
'/usr/lib/udev/rules.d/70-hypervvss.rules',
'/usr/lib/udev/rules.d/70-spice-vdagentd.rules',
'/usr/lib/udev/rules.d/70-spice-webdavd.rules',
'/usr/lib/udev/rules.d/71-alpha_imaging_technology_co-vr.rules',
'/usr/lib/udev/rules.d/71-astro_gaming-controllers.rules',
'/usr/lib/udev/rules.d/71-betop-controllers.rules',
'/usr/lib/udev/rules.d/71-nacon-controllers.rules',
'/usr/lib/udev/rules.d/71-sony-vr.rules',
'/usr/lib/udev/rules.d/75-probe_mtd.rules',
'/usr/lib/udev/rules.d/85-hdparm.rules',
'/usr/lib/udev/rules.d/85-regulatory.rules',
'/usr/lib/udev/rules.d/90-daxctl-device.rules',
'/usr/lib/udev/rules.d/91-drm-modeset.rules',
'/usr/lib/udev/rules.d/96-e2scrub.rules',
'/usr/lib/udev/rules.d/99-BlackmagicDevices.rules',
'/usr/lib/udev/rules.d/99-DavinciPanel.rules',
'/usr/lib/udev/rules.d/99-fuse3.rules',
'/usr/lib/udev/rules.d/99-fuse.rules',
'/usr/lib/udev/rules.d/99-libsane1.rules',
'/usr/lib/udev/rules.d/99-nfs.rules',
'/usr/lib/udev/rules.d/99-qemu-guest-agent.rules'
)