osquery-defense-kit/detection/execution/unexpected-execdir-linux.sql
2023-12-15 17:10:06 -05:00

97 lines
3.0 KiB
SQL

-- Programs running out of unexpected directories, such as /tmp (state-based)
--
-- references:
-- * https://blog.talosintelligence.com/2022/10/alchimist-offensive-framework.html
--
-- tags: transient process state
-- platform: linux
SELECT
-- Child
p0.pid AS p0_pid,
p0.cgroup_path AS p0_cgroup,
p0.path AS p0_path,
p0.name AS p0_name,
p0.cmdline AS p0_cmd,
p0.cwd AS p0_cwd,
p0.euid AS p0_euid,
p0_hash.sha256 AS p0_sha256,
-- Parent
p0.parent AS p1_pid,
p1.path AS p1_path,
p1.name AS p1_name,
p1_f.mode AS p1_mode,
p1.euid AS p1_euid,
p1.cmdline AS p1_cmd,
p1_hash.sha256 AS p1_sha256,
-- Grandparent
p1.parent AS p2_pid,
p2.name AS p2_name,
p2.path AS p2_path,
p2.cmdline AS p2_cmd,
p2_hash.sha256 AS p2_sha256
FROM
processes p0
LEFT JOIN file f ON p0.path = f.path
LEFT JOIN hash p0_hash ON p0.path = p0_hash.path
LEFT JOIN processes p1 ON p0.parent = p1.pid
LEFT JOIN file p1_f ON p1.path = p1_f.path
LEFT JOIN hash p1_hash ON p1.path = p1_hash.path
LEFT JOIN processes p2 ON p1.parent = p2.pid
LEFT JOIN hash p2_hash ON p2.path = p2_hash.path
WHERE
p0.pid IN (
SELECT DISTINCT
pid
FROM
processes
WHERE
pid > 1
AND path != ""
AND INSTR(path, "/bin") != 1
AND INSTR(path, "/sbin/") != 1
AND INSTR(path, "/usr/bin/") != 1
AND INSTR(path, "/usr/lib/") != 1
AND INSTR(path, "/usr/lib64/") != 1
AND INSTR(path, "/usr/libexec") != 1
AND INSTR(path, "/usr/sbin/") != 1
AND INSTR(path, "/usr/x86_64-pc-linux-gnu/bin") != 1
AND INSTR(path, "/home/") != 1
AND INSTR(path, "/nix/") != 1
AND INSTR(path, "/opt/") != 1
AND INSTR(path, "/snap/") != 1
AND INSTR(path, "/var/lib/snapd/") != 1
AND INSTR(path, "/usr/share/spotify") != 1
AND INSTR(path, "/usr/share/code/") != 1
AND INSTR(path, "/usr/local/") != 1
AND INSTR(path, "/tmp/go-build") != 1
AND INSTR(path, "/app/") != 1
AND INSTR(path, "/ko-app") != 1
AND INSTR(path, "/usr/share/teams/") != 1
AND path NOT LIKE "%/.terraform%"
AND path != '/bpfilter_umh'
AND NOT path LIKE '/tmp/%/osqtool'
AND NOT path LIKE '/tmp/GoLand/___go_build_%_go'
AND NOT cgroup_path LIKE '/user.slice/user-1000.slice/user@1000.service/user.slice/nerdctl-%'
AND NOT cgroup_path LIKE '/user.slice/user-1000.slice/user@1000.service/user.slice/libpod-%'
AND NOT cgroup_path LIKE '/system.slice/docker-%' -- Interactive terminal
AND NOT (
cgroup_path LIKE '/user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-Alacritty-%.scope'
AND path LIKE '/tmp/%'
)
AND NOT (
euid > 500
AND (
path LIKE '/tmp/terraform_%/terraform'
OR path LIKE '/tmp/%/output/%'
OR path LIKE '/tmp/%/_output/%'
OR path LIKE '/tmp/%/bin/%'
OR path LIKE '%/.terraform/providers/%'
OR path LIKE '/tmp/.mount_%'
)
)
GROUP BY
path
)
GROUP BY
p0.pid