Executables From The Future

Programs which claim to be from the future, based on (btime,ctime,mtime)

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 which claim to be from the future, based on (btime,ctime,mtime)
--
-- references:
--   * https://attack.mitre.org/techniques/T1070/006/ (Indicator Removal on Host: Timestomp)
--
-- false positives:
--   * Badly distributed software
--
-- tags: persistent state process
SELECT
  p.pid,
  p.path,
  p.name,
  p.cmdline,
  p.cwd,
  p.euid,
  p.parent,
  f.ctime,
  f.btime,
  f.mtime,
  p.start_time,
  f.mtime > (strftime('%s', 'now') + 43200) AS mtime_newer,
  f.ctime > (strftime('%s', 'now') + 43200) AS ctime_newer,
  f.btime > (strftime('%s', 'now') + 43200) AS btime_newer,
  f.mtime - strftime('%s', 'now') AS mtime_diff,
  f.ctime - strftime('%s', 'now') AS ctime_diff,
  f.btime - strftime('%s', 'now') AS btime_diff,
  strftime('%s', 'now') AS now_ts,
  hash.sha256 AS child_hash256,
  pp.path AS parent_path,
  pp.cmdline AS parent_cmd,
  pp.cwd AS parent_cwd,
  hash.sha256 AS parent_sha256
FROM
  processes p
  LEFT JOIN file f ON p.path = f.path
  LEFT JOIN processes pp ON p.parent = pp.pid
  LEFT JOIN hash ON p.path = hash.path
WHERE
  (
    mtime_newer == 1
    OR ctime_newer == 1
    OR btime_newer == 1
  )
  AND NOT p.path LIKE '/Applications/Signal.app%'
  AND NOT p.path LIKE '/private/var/db/com.apple.xpc.roleaccountd.staging/%'
  -- 2038
  AND NOT f.mtime > 2153484373

tags: SStagSS

Reference

https://github.com/chainguard-dev/osquery-defense-kit