62 lines
2.0 KiB
SQL
62 lines
2.0 KiB
SQL
-- Find processes that run with a lower effective UID than their parent (event-based)
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--
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-- references:
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-- * https://attack.mitre.org/techniques/T1548/001/ (Setuid and Setgid)
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-- * https://cybersecurity.att.com/blogs/labs-research/shikitega-new-stealthy-malware-targeting-linux
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--
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-- related:
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-- * unexpected-privilege-escalation.sql
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--
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-- tags: events process escalation
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-- platform: darwin
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-- interval: 30
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SELECT
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p.pid AS child_pid,
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p.path AS child_path,
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REGEX_MATCH (RTRIM(file.path, '/'), '.*/(.*?)$', 1) AS child_name,
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p.cmdline AS child_cmdline,
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p.time,
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pp.start_time,
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p.euid AS child_euid,
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file.mode AS child_mode,
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hash.sha256 AS child_hash,
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p.parent AS parent_pid,
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pp.path AS parent_path,
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pp.name AS parent_name,
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pp.cmdline AS parent_cmdline,
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pp.euid AS parent_euid,
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pfile.mode AS parent_mode,
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phash.sha256 AS parent_hash
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FROM
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process_events p
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JOIN processes pp ON p.parent = pp.pid
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LEFT JOIN file ON p.path = file.path
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LEFT JOIN hash ON p.path = hash.path
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LEFT JOIN file AS pfile ON pp.path = pfile.path
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LEFT JOIN hash AS phash ON pp.path = phash.path
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WHERE
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p.time > (strftime('%s', 'now') -30)
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AND p.euid < pp.euid
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AND p.path NOT IN (
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'/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Support/mdworker_shared',
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'/usr/bin/login',
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'/usr/bin/su',
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'/usr/bin/sudo',
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'/usr/local/bin/doas'
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)
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-- Exclude weird bad data we've seen due to badly recorded macOS parent/child relationships, fixable by reboot
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AND NOT (
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p.cmdline IN (
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'/usr/sbin/cupsd -l',
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'/usr/libexec/mdmclient daemon',
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'/System/Library/Frameworks/CoreServices.framework/Frameworks/Metadata.framework/Versions/A/Support/mdworker_shared -s mdworker -c MDSImporterWorker -m com.apple.mdworker.shared'
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)
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)
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-- More very weird data that keeps showing up: gopls starting everything!
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-- I think this may be due to some bad joining
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AND NOT (
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pp.cmdline LIKE '%/go/bin/gopls -mode=stdio'
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AND pp.path LIKE '/Users/%/go/bin/gopls'
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AND pp.euid > 500
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)
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