osquery-defense-kit/detection/credentials/unexpected-sensitive-file-a...

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-- This query looks for exotic open file/process combinations
--
-- It's unfortunately of limited use, as the query is slow (250ms)
-- and it requires catching a program at the exact moment it has
-- the file open.
-- tags: ephemeral critical access
SELECT
pof.pid,
pof.fd,
pof.path,
f.uid AS file_uid,
p.cwd AS cwd,
p.euid,
p.uid AS process_uid,
p.name AS program_name,
p.cmdline AS cmdline,
pp.name AS parent_name,
pp.cwd AS parent_cwd,
pp.path AS parent_path,
hp.sha256 AS parent_sha256,
pf.filename AS program_base,
hash.sha256,
REPLACE(f.directory, u.directory, '~') AS dir,
CONCAT (
pf.filename,
',',
p.name,
',',
IIF(
REGEX_MATCH (
REPLACE(f.directory, u.directory, '~'),
'([/~].*?/.*?/.*?)/',
1
) != '',
REGEX_MATCH (
REPLACE(f.directory, u.directory, '~'),
'([/~].*?/.*?/.*?)/',
1
),
REPLACE(f.directory, u.directory, '~')
)
) AS exception_key
FROM
process_open_files pof
LEFT JOIN processes p ON pof.pid = p.pid
LEFT JOIN processes pp ON p.parent = pp.pid
LEFT JOIN file f ON pof.path = f.path
LEFT JOIN file pf ON p.path = pf.path
LEFT JOIN users u ON p.uid = u.uid
LEFT JOIN hash ON p.path = hash.path
LEFT JOIN hash hp ON pp.path = hp.path
WHERE
f.uid != ''
AND pf.filename != ''
AND (
pof.path LIKE '/home/%/.ssh/%'
OR pof.path LIKE '/home/%/.mozilla/firefox/%'
OR pof.path LIKE '/home/%/.config/google-chrome/%'
OR pof.path LIKE '/root/.ssh/%'
OR pof.path LIKE '/root/.bash_history'
OR pof.path LIKE '/home/%/.config/gcloud/%'
OR pof.path LIKE '/home/%/.config/Slack/%'
OR pof.path LIKE '/home/%/.bash_history'
OR pof.path LIKE '/home/%/.cache/mozilla/firefox%'
OR pof.path LIKE '/home/%/.config/mozilla/firefox%'
OR pof.path LIKE '/home/%/.aws%'
)
AND NOT (
file_uid == process_uid
AND exception_key IN (
'aws,aws,~/.aws',
'chrome_crashpad_handler,chrome_crashpad,',
'chrome_crashpad_handler,chrome_crashpad,~/.config/google-chrome',
'chrome,chrome,~/.config/google-chrome',
'firefox,.firefox-wrappe,~/.cache/mozilla',
'firefox,.firefox-wrappe,~/.mozilla/firefox',
'firefox,file:// Content,~/.mozilla/firefox',
'firefox,firefox,~/.cache/mozilla',
'firefox,firefox,~/.mozilla/firefox',
'firefox,file:// Content,~/.cache/mozilla',
'firefox,firefox,~/snap/firefox',
'firefox,Isolated Servic,~/.cache/mozilla',
'firefox,Isolated Servic,~/snap/firefox',
'firefox,Isolated Web Co,~/.cache/mozilla',
'firefox,Isolated Web Co,~/.mozilla/firefox',
'firefox,Isolated Web Co,~/snap/firefox',
'firefox,Privileged Cont,~/.cache/mozilla',
'firefox,Privileged Cont,~/.mozilla/firefox',
'firefox,Privileged Cont,~/snap/firefox',
'firefox,Web Content,~/.cache/mozilla',
'firefox,Web Content,~/snap/firefox',
'firefox,WebExtensions,~/.cache/mozilla',
'firefox,WebExtensions,~/.mozilla/firefox',
'firefox,WebExtensions,~/snap/firefox',
'plugin-container,MainThread,~/.mozilla/firefox',
'slack,slack,~/.config/Slack',
'slack,slack,~/snap/slack'
)
)
GROUP BY
pof.pid,
pof.path