osquery-defense-kit/detection/persistence/unexpected-cron-entries.sql

-- Unexpected crontab entries
--
-- references:
--   * https://attack.mitre.org/techniques/T1053/003/ (Scheduled Task/Job: Cron)
--
-- false positives:
--   * crontab entries added by the user
--
-- tags: persistent filesystem state
-- platform: posix
SELECT
  *
FROM
  crontab
WHERE
  command NOT LIKE 'root%run-parts%'
  AND command NOT LIKE '%freshclam%'
  AND command NOT LIKE '%clamscan%'
  AND command NOT LIKE '%e2scrub%'
  AND command NOT LIKE '%zfs-linux%'
  AND command NOT LIKE '%anacron start%'
  AND command NOT LIKE '%/usr/lib/php/sessionclean%'
  AND command NOT LIKE 'root command -v debian-sa1%'
  AND command NOT LIKE '%rsync%'
  AND command NOT LIKE 'gsutil %'