osquery-defense-kit/detection/execution/exotic-command-events-macos.sql
2023-02-01 13:55:55 -05:00

196 lines
7.5 KiB
SQL

-- Pick out exotic processes based on their command-line (events-based)
--
-- references:
-- * https://themittenmac.com/what-does-apt-activity-look-like-on-macos/
--
-- false positives:
-- * possible, but none known
--
-- tags: transient process events
-- platform: darwin
-- interval: 30
SELECT -- Child
pe.path AS p0_path,
REGEX_MATCH (pe.path, '.*/(.*)', 1) AS p0_name,
TRIM(pe.cmdline) AS p0_cmd,
pe.cwd AS p0_cwd,
pe.pid AS p0_pid,
pe.euid AS p0_euid,
p.cgroup_path AS p0_cgroup,
s.authority AS p0_authority,
-- Parent
pe.parent AS p1_pid,
p1.cgroup_path AS p1_cgroup,
TRIM(COALESCE(p1.cmdline, pe1.cmdline)) AS p1_cmd,
COALESCE(p1.path, pe1.path) AS p1_path,
COALESCE(p_hash1.sha256, pe_hash1.sha256) AS p1_hash,
REGEX_MATCH(COALESCE(p1.path, pe1.path), '.*/(.*)', 1) AS p1_name,
pe_sig1.authority AS p1_authority,
-- Grandparent
COALESCE(p1.parent, pe1.parent) AS p2_pid,
COALESCE(p1_p2.cgroup_path, pe1_p2.cgroup_path) AS p2_cgroup,
TRIM(
COALESCE(p1_p2.cmdline, pe1_p2.cmdline, pe1_pe2.cmdline)
) AS p2_cmd,
COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path) AS p2_path,
COALESCE(
p1_p2_hash.path,
pe1_p2_hash.path,
pe1_pe2_hash.path
) AS p2_hash,
REGEX_MATCH(
COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path),
'.*/(.*)',
1
) AS p2_name,
COALESCE(
p1_p2_sig.authority,
pe1_p2_sig.authority,
pe1_pe2_sig.authority
) AS p2_authority,
-- Exception key
REGEX_MATCH (pe.path, '.*/(.*)', 1) || ',' || MIN(pe.euid, 500) || ',' || REGEX_MATCH(COALESCE(p1.path, pe1.path), '.*/(.*)', 1) || ',' || REGEX_MATCH(
COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path),
'.*/(.*)',
1
) AS exception_key
FROM process_events pe,
uptime
LEFT JOIN processes p ON pe.pid = p.pid
LEFT JOIN signature s ON pe.path = s.path -- Parents (via two paths)
LEFT JOIN processes p1 ON pe.parent = p1.pid
LEFT JOIN hash p_hash1 ON p1.path = p_hash1.path
LEFT JOIN process_events pe1 ON pe.parent = pe1.pid
AND pe1.cmdline != ''
LEFT JOIN hash pe_hash1 ON pe1.path = pe_hash1.path
LEFT JOIN signature pe_sig1 ON pe1.path = pe_sig1.path -- Grandparents (via 3 paths)
LEFT JOIN processes p1_p2 ON p1.parent = p1_p2.pid -- Current grandparent via parent processes
LEFT JOIN processes pe1_p2 ON pe1.parent = pe1_p2.pid -- Current grandparent via parent events
LEFT JOIN process_events pe1_pe2 ON pe1.parent = pe1_p2.pid
AND pe1_pe2.cmdline != '' -- Past grandparent via parent events
LEFT JOIN hash p1_p2_hash ON p1_p2.path = p1_p2_hash.path
LEFT JOIN hash pe1_p2_hash ON pe1_p2.path = pe1_p2_hash.path
LEFT JOIN hash pe1_pe2_hash ON pe1_pe2.path = pe1_pe2_hash.path
LEFT JOIN signature p1_p2_sig ON p1_p2.path = p1_p2_sig.path
LEFT JOIN signature pe1_p2_sig ON pe1_p2.path = pe1_p2_sig.path
LEFT JOIN signature pe1_pe2_sig ON pe1_pe2.path = pe1_pe2_sig.path
WHERE pe.time > (strftime('%s', 'now') -30)
AND pe.status = 0
AND pe.cmdline != ''
AND pe.cmdline IS NOT NULL
AND pe.status == 0
AND (
p0_name IN (
'bitspin',
'bpftool',
'csrutil',
'heyoka',
'nstx',
'dnscat2',
'tuns',
'iodine',
'rshell',
'rsh',
'incbit',
'kmod',
'lushput',
'mkfifo',
'msfvenom',
'nc',
'socat'
) -- Chrome Stealer
OR p0_cmd LIKE '%set visible of front window to false%'
OR p0_cmd LIKE '%chrome%-load-extension%' -- Known attack scripts
OR p0_name LIKE '%pwn%'
OR p0_name LIKE '%attack%' -- Unusual behaviors
OR p0_cmd LIKE '%powershell%'
OR p0_cmd LIKE '%chattr -ia%'
OR p0_cmd LIKE '%chmod%777 %'
OR p0_cmd LIKE '%touch%acmr%'
OR p0_cmd LIKE '%touch -r%'
OR p0_cmd LIKE '%ld.so.preload%'
OR p0_cmd LIKE '%urllib.urlopen%'
OR p0_cmd LIKE '%nohup%tmp%'
OR p0_cmd LIKE '%killall Terminal%'
OR p0_cmd LIKE '%iptables stop'
OR (
pe.euid = 0
AND (
p0_cmd LIKE '%pkill -f%'
OR p0_cmd LIKE '%xargs kill -9%'
)
)
OR p0_cmd LIKE '%rm -f /var/tmp%'
OR p0_cmd LIKE '%rm -f /tmp%'
OR p0_cmd LIKE '%nohup /bin/bash%'
OR (
INSTR(p0_cmd, 'history') > 0
AND p0_cmd LIKE '%history'
)
OR p0_cmd LIKE '%echo%|%base64 --decode %|%'
OR p0_cmd LIKE '%launchctl load%'
OR p0_cmd LIKE '%launchctl bootout%'
OR p0_cmd LIKE '%chflags uchg%'
OR (
p0_cmd LIKE '%UserKnownHostsFile=/dev/null%'
AND NOT p1_name = 'limactl'
) -- Random keywords
OR p0_cmd LIKE '%ransom%' -- Reverse shells
OR p0_cmd LIKE '%fsockopen%'
OR p0_cmd LIKE '%openssl%quiet%'
OR p0_cmd LIKE '%pty.spawn%'
OR (
p0_cmd LIKE '%sh -i'
AND NOT p1_name IN ('sh', 'java')
AND NOT p1_cmd LIKE "%pipenv shell"
)
OR p0_cmd LIKE '%socat%'
OR p0_cmd LIKE '%SOCK_STREAM%'
OR INSTR(p0_cmd, 'Socket.') > 0
) -- Things that could reasonably happen at boot.
AND NOT (
pe.path = '/usr/bin/mkfifo'
AND p0_cmd LIKE '%/org.gpgtools.log.%/fifo'
)
AND NOT (
p0_cmd LIKE '%csrutil status'
AND p1_name IN ('Dropbox')
)
AND NOT (
p0_cmd IN (
'/bin/launchctl bootout gui/501 /Library/LaunchAgents/com.logi.optionsplus.plist',
'/bin/launchctl bootout system/com.docker.socket',
'/bin/launchctl load /Library/LaunchDaemons/com.logi.optionsplus.updater.plist',
'/bin/launchctl load -wF /Library/LaunchAgents/com.adobe.GC.AGM.plist',
'/bin/launchctl load -w /Library/LaunchDaemons/com.docker.socket.plist',
'/bin/rm -f /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress',
'git history',
'launchctl asuser 501 launchctl load /System/Library/LaunchAgents/com.apple.SafariBookmarksSyncAgent.plist',
'launchctl load /Library/LaunchDaemons/us.zoom.ZoomDaemon.plist',
'launchctl load /System/Library/LaunchAgents/com.apple.SafariBookmarksSyncAgent.plist',
'launchctl load -w /Library/LaunchDaemons/com.opalcamera.cameraExtensionShim.plist',
'launchctl load -w /Library/LaunchDaemons/com.opalcamera.OpalCamera.installUpdate.daemon.plist',
'/Library/Apple/System/Library/StagedFrameworks/Safari/SafariShared.framework/XPCServices/com.apple.Safari.History.xpc/Contents/MacOS/com.apple.Safari.History',
'sudo launchctl load /Library/LaunchDaemons/us.zoom.ZoomDaemon.plist',
'/usr/bin/csrutil report',
'/usr/bin/csrutil status',
'/usr/bin/pkill -F /private/var/run/lima/shared_socket_vmnet.pid',
'/usr/bin/xattr -d com.apple.writer_bundle_identifier /Applications/Safari.app',
'xpcproxy com.apple.Safari.History'
) -- The source of these commands is still a mystery to me.
OR pe.parent = -1
)
AND NOT p0_cmd LIKE '/bin/launchctl load -wF /Users/%/Library/PreferencePanes/../LaunchAgents/com.adobe.GC.Invoker-1.0.plist'
AND NOT p0_cmd LIKE '/bin/launchctl load -w /Users/%/Library/LaunchAgents/keybase.%.plist'
AND NOT p0_cmd LIKE '-history%'
AND NOT p0_cmd LIKE '/bin/rm -f /tmp/periodic.%'
AND NOT p0_cmd LIKE 'rm -f /tmp/locate%/_updatedb%'
AND NOT p0_cmd LIKE 'rm -f /tmp/locate%/mklocate%/_mklocatedb%'
AND NOT p0_cmd LIKE '%launchctl load -w /Library/LaunchAgents/com.opalcamera.vcam.assistant.plist'
AND NOT p0_cmd LIKE '%launchctl load -w /Library/LaunchAgents/com.opalcamera.OpalCamera.startOnUsbPlugged.agent.plist'
AND NOT p0_cmd LIKE 'rm -f /tmp/insttmp_%'
AND NOT p0_cmd LIKE '/bin/cp %history%sessions/%'
AND NOT p0_cmd LIKE 'touch -r /tmp/KSInstallAction.%'
AND NOT p0_cmd LIKE '%find /Applications/LogiTuneInstaller.app -type d -exec chmod 777 {}%'
AND NOT p0_cmd LIKE '/bin/rm -f /tmp/com.adobe.%.updater/%'
AND NOT p0_name IN ('cc1', 'compile')