osquery-defense-kit/detection/execution/tiny-executable.sql

36 lines
933 B
SQL

-- Unusually small programs (state-based)
--
-- references:
-- * https://cybersecurity.att.com/blogs/labs-research/shikitega-new-stealthy-malware-targeting-linux
--
-- tags: transient process state
SELECT
p.pid,
p.path,
p.cmdline,
file.size,
p.start_time,
file.mode,
file.type,
p.cwd,
p.euid,
p.parent,
pp.path AS parent_path,
pp.name AS parent_name,
pp.cmdline AS parent_cmdline,
pp.euid AS parent_euid,
hash.sha256 AS parent_sha256
FROM
processes p
LEFT JOIN file ON p.path = file.path
LEFT JOIN processes pp ON p.parent = pp.pid
LEFT JOIN hash ON pp.path = hash.path
WHERE
file.size > 0
AND file.size < 10000
AND NOT file.path LIKE '/Users/%/.zsh/completion'
AND NOT file.path LIKE '/home/%/.zsh/completion'
AND NOT file.path LIKE '/home/%/.local/share/Steam/ubuntu%'
AND NOT file.path LIKE '/home/%/.local/share/Steam/steamapps/%'
AND NOT file.path IN ('/', '/usr/bin/ruby')