osquery-defense-kit/detection/evasion/overwritten-memory-map-ddex...

50 lines
1.2 KiB
SQL

-- Processes with a memory map that suggests they might be code smuggling.
--
-- references:
-- * https://github.com/arget13/DDexec
--
-- tags: persistent daemon seldom
SELECT
pmm.path AS mmap_path,
pmm.start as mmap_start,
pmm.end AS mmap_end,
-- Child
p0.pid AS p0_pid,
p0.path AS p0_path,
p0.name AS p0_name,
p0.cmdline AS p0_cmd,
p0.cwd AS p0_cwd,
p0.cgroup_path AS p0_cgroup,
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.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
JOIN process_memory_map pmm ON p0.pid = pmm.pid
LEFT JOIN hash p0_hash ON p0.path = p0_hash.path
LEFT JOIN processes p1 ON p0.parent = p1.pid
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.path != ""
AND pmm.offset = 0
AND pmm.device = '00:00'
AND pmm.permissions = 'r--p'
AND pmm.pseudo = 0
and pmm.start LIKE '0x0%'
GROUP BY
p0.pid;