46 lines
1.4 KiB
SQL
46 lines
1.4 KiB
SQL
-- Applications setting environment variables to bypass security protections
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--
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-- Inpsired by BPFdoor and other intrusions
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-- https://www.sandflysecurity.com/blog/compromised-linux-cheat-sheet/
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--
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-- WARNING: This query is known to require a higher than average wall time.
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--
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-- interval: 30
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-- platform: darwin
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SELECT
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key,
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value,
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p.pid,
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p.path,
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p.cwd,
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p.cmdline,
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p.parent AS parent_pid,
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pp.cmdline AS parent_cmd
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-- Querying processes first and filtering by time gives a massive 20X speed improvement
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-- over querying process_envs first and JOIN'ing against processes
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FROM
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processes p
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LEFT JOIN process_envs pe ON p.pid = pe.pid
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LEFT JOIN processes pp ON p.parent = pp.pid
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WHERE -- This time should match the interval
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p.start_time > (strftime('%s', 'now') - 20)
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AND (
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key = 'HISTFILE'
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AND NOT VALUE LIKE '/Users/%/.%_history'
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)
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OR (
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key = 'LD_PRELOAD'
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AND NOT p.path LIKE '%/firefox'
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AND NOT pe.value = 'libfakeroot.so'
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AND NOT pe.value LIKE 'libmozsandbox.so%'
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AND NOT pe.value LIKE ':/snap/%' -- Yes, on macOS (emote)
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)
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OR (
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key = 'DYLD_INSERT_LIBRARIES' -- actively exploited on programs which disable library security
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AND NOT pe.value = '/System/Library/PrivateFrameworks/PreviewsInjection.framework/PreviewsInjection'
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AND NOT pe.value LIKE '/opt/homebrew/Cellar/r/4.%/lib/R/lib/libR.dylib'
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)
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OR (
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key = 'DYLD_FRAMEWORK_PATH' -- sort of obsolete, but may affect SIP abusers
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)
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