osquery-defense-kit/detection/execution/unexpected-packet-sniffer.sql
2023-05-16 16:31:31 -04:00

49 lines
1.2 KiB
SQL

-- Find unexpected use of raw sockets in executables, sometimes used for C&C communications
--
-- false positives:
-- * operating-system network managers
--
-- tags: transient process state
-- platform: posix
SELECT
pop.*,
-- 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.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
process_open_sockets pop
LEFT JOIN processes p0 ON pop.pid = p0.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
pop.family = 17 -- PF_PACKET
AND p0.name NOT IN (
'wpa_supplicant',
'systemd-network',
'NetworkManager',
'dhclient',
'dhcpcd',
'tcpdump'
)