55 lines
1.4 KiB
SQL
55 lines
1.4 KiB
SQL
-- Processes that do not exist on disk, running in osquery's namespace
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--
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-- false positives:
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-- * none observed
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--
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-- references:
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-- * https://attack.mitre.org/techniques/T1070/004/ (Indicator Removal on Host: File Deletion)
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--
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-- tags: persistent process state
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-- platform: linux
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SELECT
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p.pid,
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p.euid,
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p.cmdline,
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p.path,
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p.cgroup_path,
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mnt_namespace,
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p.cwd,
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p.on_disk,
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p.state,
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file.inode,
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pp.on_disk AS parent_on_disk,
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pp.path AS parent_path,
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pp.cmdline AS parent_cmdline,
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pp.cwd AS parent_cwd,
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ph.sha256 AS parent_sha256
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FROM
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processes p
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LEFT JOIN file ON p.path = file.path
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LEFT JOIN process_namespaces ON p.pid = process_namespaces.pid
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LEFT JOIN processes pp ON p.parent = pp.pid
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LEFT JOIN hash ph ON pp.path = ph.path
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WHERE
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p.on_disk != 1
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AND p.path != ''
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-- use osquery as the reference mount namespace
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AND mnt_namespace IN (
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SELECT DISTINCT
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(mnt_namespace)
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FROM
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process_namespaces
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JOIN processes ON processes.pid = process_namespaces.pid
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WHERE
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processes.name IN ('osqueryi', 'osqueryd')
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)
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-- This is truly a missing program, not just one that has been updated with a new binary.
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AND file.inode IS NULL
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AND p.path != '/bpfilter_umh'
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-- Snap packages?
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AND p.path NOT LIKE '/tmp/.mount_%'
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AND p.path NOT LIKE '/home/%/.cache/yay/1password-cli/pkg/1password-cli/usr/bin/op'
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-- Probably just an upgrade
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AND p.path NOT LIKE '/usr/bin/%'
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AND p.path NOT LIKE '/opt/%'
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