186 lines
4.3 KiB
SQL
186 lines
4.3 KiB
SQL
-- Detects unexpected programs opening files in /dev on Linux
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--
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-- references:
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-- * https://attack.mitre.org/techniques/T1056/001/ (Input Capture: Keylogging)
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--
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-- false positives:
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-- * any program which needs access to device drivers
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--
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-- platform: linux
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-- tags: persistent state sniffer
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SELECT
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pof.pid,
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pof.path AS device,
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p.path AS program,
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p.name AS program_name,
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p.cmdline AS cmdline,
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hash.sha256,
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CONCAT (
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IIF(
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REGEX_MATCH (
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TRIM(REPLACE(pof.path, ' (deleted)', '')),
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'(/dev/.*)[\d ]+$',
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1
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) != '',
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REGEX_MATCH (
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TRIM(REPLACE(pof.path, ' (deleted)', '')),
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'(/dev/.*)[\d ]+$',
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1
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),
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TRIM(REPLACE(pof.path, ' (deleted)', ''))
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),
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',',
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REPLACE(
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p.path,
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RTRIM(p.path, REPLACE(p.path, '/', '')),
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''
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)
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) AS path_exception,
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CONCAT (
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TRIM(
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REPLACE(
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pof.path,
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CONCAT (
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'/',
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REPLACE(
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pof.path,
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RTRIM(pof.path, REPLACE(pof.path, '/', '')),
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''
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)
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),
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''
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)
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),
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',',
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REPLACE(
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p.path,
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RTRIM(p.path, REPLACE(p.path, '/', '')),
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''
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)
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) AS dir_exception
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FROM
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process_open_files pof
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LEFT JOIN processes p ON pof.pid = p.pid
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LEFT JOIN hash ON hash.path = p.path
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WHERE
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pof.path LIKE '/dev/%'
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AND pof.path NOT IN (
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'/dev/dri/card0',
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'/dev/dri/card1',
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'/dev/dri/renderD128',
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'/dev/dri/renderD129',
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'/dev/fuse',
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'/dev/io8log',
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'/dev/io8logmt',
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'/dev/io8logtemp',
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'/dev/null',
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'/dev/nvidia-modeset',
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'/dev/nvidia-uvm',
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'/dev/nvidia0',
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'/dev/nvidiactl',
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'/dev/ptmx',
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'/dev/pts/ptmx',
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'/dev/random',
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'/dev/rfkill',
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'/dev/snd/seq',
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'/dev/urandom',
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'/dev/vga_arbiter',
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'/dev/video10' -- workaround for poor regex management (ffmpeg)
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)
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AND pof.path NOT LIKE '/dev/pts/%'
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AND pof.path NOT LIKE '/dev/snd/%'
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AND pof.path NOT LIKE '/dev/tty%'
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AND pof.path NOT LIKE '/dev/hidraw%'
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AND pof.path NOT LIKE '/dev/shm/.com.google.Chrome.%'
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AND pof.path NOT LIKE '/dev/shm/.org.chromium.Chromium.%'
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AND pof.path NOT LIKE '/dev/shm/authentik_%'
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AND NOT dir_exception IN (
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'/dev/bus/usb,pcscd',
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'/dev/input,acpid',
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'/dev/input,gnome-shell',
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'/dev/input,systemd',
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'/dev/input,systemd-logind',
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'/dev/input,thermald',
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'/dev/input,upowerd',
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'/dev/input,Xorg',
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'/dev/kmsg,systemd-coredump',
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'/dev/net,tailscaled',
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'/dev/net,.tailscaled-wrapped',
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'/dev/net/tun,qemu-system-x86_64',
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'/dev/shm,1password',
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'/dev/shm,Brackets',
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'/dev/shm,chrome',
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'/dev/shm,code',
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'/dev/shm,electron',
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'/dev/shm,firefox',
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'/dev/shm,gopls',
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'/dev/shm,java',
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'/dev/shm,jcef_helper',
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'/dev/shm,slack',
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'/dev/shm,spotify',
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'/dev/shm,steam',
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'/dev/shm,steamwebhelper',
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'/dev/shm,wine64-preloader',
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'/dev/shm,winedevice.exe',
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'/dev/snd,alsactl',
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'/dev/snd,pipewire',
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'/dev/snd,pulseaudio',
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'/dev/snd,.pulseaudio-wrapped',
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'/dev/snd,wireplumber',
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'/dev/usb,apcupsd',
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'/dev/usb,upowerd'
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)
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AND NOT path_exception IN (
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'/dev/autofs,systemd',
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'/dev/hidraw,chrome',
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'/dev/input/event,thermald',
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'/dev/input/event,Xorg',
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'/dev/kmsg,kubelet',
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'/dev/kmsg,systemd',
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'/dev/kmsg,systemd-journald',
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'/dev/kvm,qemu-system-x86_64',
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'/dev/mapper/control,dockerd',
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'/dev/mcelog,mcelog',
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'/dev/media0,pipewire',
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'/dev/media0,wireplumber',
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'/dev/media,pipewire',
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'/dev/media,wireplumber',
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'/dev/net/tun,slirp4netns',
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'/dev/tty,agetty',
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'/dev/tty,gdm-wayland-session',
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'/dev/tty,gdm-x-session',
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'/dev/tty,systemd-logind',
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'/dev/tty,Xorg',
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'/dev/uinput,bluetoothd',
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'/dev/usb/hiddev,apcupsd',
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'/dev/usb/hiddev,upowerd',
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'/dev/video0,chrome',
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'/dev/video,chrome',
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'/dev/video,ffmpeg',
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'/dev/video,firefox',
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'/dev/video,obs',
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'/dev/video,obs-ffmpeg-mux',
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'/dev/video,pipewire',
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'/dev/video,vlc',
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'/dev/video,wireplumber',
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'/dev/video,zoom',
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'/dev/zfs,zed',
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'/dev/zfs,zfs',
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'/dev/zfs,zpool'
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)
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AND NOT (
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device LIKE '/dev/bus/usb/%'
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AND program_name IN (
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'fwupd',
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'gphoto2',
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'gvfs-gphoto2-vo',
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'gvfs-gphoto2-volume-monitor',
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'gvfsd-gphoto2',
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'pcscd',
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'streamdeck',
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'usbmuxd'
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)
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)
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GROUP BY
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pof.pid
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