-- Catch applications running from unusual directories, such as /tmp (event-based)
--
-- references:
--   * https://attack.mitre.org/techniques/T1074/
--
-- false positives:
--   * programs running in alternative namespaces (Docker)
--
-- interval: 60
-- platform: linux
-- tags: process events
SELECT
  pe.pid,
  pe.path,
  REGEX_MATCH (pe.path, '(.*)/', 1) AS dirname,
  pe.mode,
  pe.cwd,
  pe.euid,
  pe.parent,
  pp.path AS parent_path,
  pp.name AS parent_name,
  pp.cmdline AS parent_cmd,
  pp.euid AS parent_euid,
  phash.sha256 AS parent_sha256,
  hash.sha256 AS sha256
FROM
  process_events pe
  LEFT JOIN processes p ON pe.pid = pe.pid
  LEFT JOIN processes pp ON pe.parent = p.pid
  LEFT JOIN hash ON pe.path = hash.path
  LEFT JOIN hash phash ON pp.path = hash.path
WHERE
  pe.time > (strftime('%s', 'now') -60)
  AND dirname NOT LIKE '/home/%'
  AND dirname NOT LIKE '/nix/store/%/bin'
  AND dirname NOT LIKE '/nix/store/%/lib/%'
  AND dirname NOT LIKE '/nix/store/%/libexec'
  AND dirname NOT LIKE '/nix/store/%/libexec/%'
  AND dirname NOT LIKE '/nix/store/%/share/%'
  AND dirname NOT LIKE '/opt/%'
  AND dirname NOT LIKE '/tmp/go-build%'
  AND dirname NOT LIKE '/snap/%'
  AND dirname NOT LIKE '/usr/libexec/%'
  AND dirname NOT LIKE '/usr/local/%/bin/%'
  AND dirname NOT LIKE '/usr/local/%bin'
  AND dirname NOT LIKE '/usr/local/%libexec'
  and dirname NOT LIKE '/usr/local/Cellar/%'
  AND dirname NOT LIKE '/usr/lib/%'
  AND dirname NOT LIKE '/usr/lib64/%'
  AND dirname NOT LIKE '/tmp/%/bin'
  AND dirname NOT LIKE '/usr/local/go/pkg/tool/%'
  AND dirname NOT IN (
    '/',
    '/app',
    '/bin',
    '/ko-app',
    '/sbin',
    '/usr/bin',
    '/usr/lib',
    '/usr/lib64/firefox',
    '/usr/lib/bluetooth',
    '/usr/lib/cups/notifier',
    '/usr/lib/evolution-data-server',
    '/usr/libexec',
    '/usr/libexec/ApplicationFirewall',
    '/usr/libexec/rosetta',
    '/usr/lib/firefox',
    '/usr/lib/fwupd',
    '/usr/lib/ibus',
    '/usr/lib/libreoffice/program',
    '/usr/lib/polkit-1',
    '/usr/lib/slack',
    '/usr/lib/snapd',
    '/usr/lib/systemd',
    '/usr/lib/telepathy',
    '/usr/lib/udisks2',
    '/usr/lib/xorg',
    '/usr/sbin',
    '/usr/share/code',
    '/usr/share/teams',
    '/usr/share/teams/resources/app.asar.unpacked/node_modules/slimcore/bin'
  )
  AND NOT pe.path IN ('/usr/lib32/ld-linux.so.2')
  AND NOT (
    dirname = ''
    AND p.name LIKE 'runc%'
  )
  AND NOT (
    dirname = ''
    AND parent_name IN ('dockerd')
  )
  AND NOT (pe.euid = 65532)
GROUP BY
  pe.pid