mirror of
https://github.com/chainguard-dev/osquery-defense-kit
synced 2024-12-12 00:54:37 +00:00
210 lines
6.4 KiB
SQL
210 lines
6.4 KiB
SQL
-- Pick out exotic processes based on their command-line (events-based)
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--
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-- references:
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-- * https://themittenmac.com/what-does-apt-activity-look-like-on-macos/
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--
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-- false positives:
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-- * possible, but none known
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--
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-- tags: transient process events
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-- platform: linux
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-- interval: 300
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SELECT
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-- Child
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pe.path AS p0_path,
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pe.time AS p0_time,
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REGEX_MATCH (pe.path, '.*/(.*)', 1) AS p0_name,
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TRIM(pe.cmdline) AS p0_cmd,
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pe.cwd AS p0_cwd,
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pe.pid AS p0_pid,
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p.cgroup_path AS p0_cgroup,
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-- Parent
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pe.parent AS p1_pid,
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p1.cgroup_path AS p1_cgroup,
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TRIM(COALESCE(p1.cmdline, pe1.cmdline)) AS p1_cmd,
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COALESCE(p1.path, pe1.path) AS p1_path,
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COALESCE(p_hash1.sha256, pe_hash1.sha256) AS p1_hash,
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REGEX_MATCH (COALESCE(p1.path, pe1.path), '.*/(.*)', 1) AS p1_name,
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-- Grandparent
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COALESCE(p1.parent, pe1.parent) AS p2_pid,
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COALESCE(p1_p2.cgroup_path, pe1_p2.cgroup_path) AS p2_cgroup,
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TRIM(
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COALESCE(p1_p2.cmdline, pe1_p2.cmdline, pe1_pe2.cmdline)
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) AS p2_cmd,
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COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path) AS p2_path,
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COALESCE(
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p1_p2_hash.path,
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pe1_p2_hash.path,
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pe1_pe2_hash.path
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) AS p2_hash,
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REGEX_MATCH (
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COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path),
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'.*/(.*)',
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1
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) AS p2_name,
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-- Exception key
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REGEX_MATCH (pe.path, '.*/(.*)', 1) || ',' || MIN(pe.euid, 500) || ',' || REGEX_MATCH (COALESCE(p1.path, pe1.path), '.*/(.*)', 1) || ',' || REGEX_MATCH (
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COALESCE(p1_p2.path, pe1_p2.path, pe1_pe2.path),
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'.*/(.*)',
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1
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) AS exception_key
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FROM
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process_events pe,
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uptime
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LEFT JOIN processes p ON pe.pid = p.pid
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-- Parents (via two paths)
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LEFT JOIN processes p1 ON pe.parent = p1.pid
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AND p1.start_time <= pe.time
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LEFT JOIN hash p_hash1 ON p1.path = p_hash1.path
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LEFT JOIN process_events pe1 ON pe.parent = pe1.pid
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AND pe1.time <= pe.time
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AND pe1.cmdline != ''
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LEFT JOIN hash pe_hash1 ON pe1.path = pe_hash1.path
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-- Grandparents (via 3 paths)
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LEFT JOIN processes p1_p2 ON p1.parent = p1_p2.pid -- Current grandparent via parent processes
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AND p1_p2.start_time <= p1.start_time
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LEFT JOIN processes pe1_p2 ON pe1.parent = pe1_p2.pid -- Current grandparent via parent events
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AND pe1_p2.start_time <= pe1.time
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LEFT JOIN process_events pe1_pe2 ON pe1.parent = pe1_p2.pid
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AND pe1_pe2.cmdline != '' -- Past grandparent via parent events
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LEFT JOIN hash p1_p2_hash ON p1_p2.path = p1_p2_hash.path
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LEFT JOIN hash pe1_p2_hash ON pe1_p2.path = pe1_p2_hash.path
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LEFT JOIN hash pe1_pe2_hash ON pe1_pe2.path = pe1_pe2_hash.path
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WHERE
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pe.time > (strftime('%s', 'now') -300)
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AND pe.cmdline != ''
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AND (
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p0_name IN (
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'bitspin',
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'bpftool',
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'heyoka',
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'nstx',
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'dnscat2',
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'tuns',
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'iodine',
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'esxcli',
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'vim-cmd',
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'minerd',
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'cpuminer-multi',
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'cpuminer',
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'httpdns',
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'rshell',
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'rsh',
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'xmrig',
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'incbit',
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'insmod',
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'kmod',
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'lushput',
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'mkfifo',
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'msfvenom',
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'nc',
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'socat'
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)
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-- Chrome Stealer
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OR p0_cmd LIKE '%chrome%-load-extension%'
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-- Known attack scripts
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OR p0_name LIKE '%pwn%'
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OR p0_name LIKE '%attack%'
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-- Unusual behaviors
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OR p0_cmd LIKE '%ufw disable%'
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OR p0_cmd LIKE '%iptables stop'
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OR p0_cmd LIKE '%setenforce 0'
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OR p0_cmd LIKE '%iptables -P % ACCEPT%'
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OR p0_cmd LIKE '%iptables -F%'
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OR p0_cmd LIKE '%chattr -i%'
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OR p0_cmd LIKE '%dd if=/dev/%'
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OR p0_cmd LIKE '%cat /dev/null >%'
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OR p0_cmd LIKE '%truncate -s0 %'
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OR (
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INSTR(p0_cmd, 'history') > 0
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AND p0_cmd LIKE '%history'
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AND p0_cmd NOT LIKE 'man %'
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)
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OR p0_cmd LIKE '%touch%acmr%'
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OR p0_cmd LIKE '%touch -r%'
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OR p0_cmd LIKE '%ld.so.preload%'
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OR p0_cmd LIKE '%urllib.urlopen%'
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OR p0_cmd LIKE '%nohup%tmp%'
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OR p0_cmd LIKE '%systemctl stop firewalld%'
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OR p0_cmd LIKE '%systemctl disable firewalld%'
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OR p0_cmd LIKE '%pkill -f%'
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OR (
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p0_cmd LIKE '%xargs kill -9%'
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AND pe.euid = 0
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)
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OR p0_cmd LIKE '%rm -rf /boot%'
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OR p0_cmd LIKE '%nohup /bin/bash%'
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OR p0_cmd LIKE '%echo%|%base64 --decode %|%'
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OR p0_cmd LIKE '%UserKnownHostsFile=/dev/null%'
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-- Crypto miners
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OR p0_cmd LIKE '%monero%'
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OR p0_cmd LIKE '%nanopool%'
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OR p0_cmd LIKE '%nicehash%'
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OR p0_cmd LIKE '%stratum%'
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-- Random keywords
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OR p0_cmd LIKE '%ransom%'
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-- Reverse shells
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OR p0_cmd LIKE '%/dev/tcp/%'
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OR p0_cmd LIKE '%/dev/udp/%'
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OR p0_cmd LIKE '%fsockopen%'
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OR p0_cmd LIKE '%openssl%quiet%'
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OR p0_cmd LIKE '%pty.spawn%'
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OR (
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p0_cmd LIKE '%sh -i'
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AND NOT p1_name IN ('sh', 'java')
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)
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OR p0_cmd LIKE '%SOCK_STREAM%'
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OR INSTR(p0_cmd, 'Socket.') > 0
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OR (
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p0_cmd LIKE '%tail -f /dev/null%'
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AND p.cgroup_path NOT LIKE '/system.slice/docker-%'
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)
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) -- Things that could reasonably happen at boot.
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AND NOT (
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pe.path IN ('/usr/bin/kmod', '/bin/kmod')
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AND p1_path = '/usr/lib/systemd/systemd'
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AND p1_cmd = '/sbin/init'
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)
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AND NOT (
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pe.path IN ('/usr/bin/kmod', '/bin/kmod')
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AND p1_name IN (
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'firewalld',
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'mkinitramfs',
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'systemd',
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'dockerd',
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'kube-proxy'
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)
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)
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AND NOT (
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p0_cmd LIKE '/usr/bin/modprobe %'
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AND p1_cgroup = '/system.slice/firewalld.service'
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)
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AND NOT (
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pe.path IN ('/usr/bin/kmod', '/bin/kmod')
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AND uptime.total_seconds < 15
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)
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AND NOT (
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pe.path = '/usr/bin/mkfifo'
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AND (
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p0_cmd LIKE '%/org.gpgtools.log.%/fifo'
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OR p0_cmd LIKE 'mkfifo -- /private/var/folders/%/T/gitstatus.POWERLEVEL9K.501.%.fifo'
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OR p0_cmd LIKE 'mkfifo -- /var/folders/%/T//p10k.worker.501.%.fifo'
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)
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)
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AND NOT p0_cmd IN ('lsmod', 'dd if=/dev/stdin conv=unblock cbs=79')
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AND NOT p0_cmd LIKE 'dirname %history'
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AND NOT p0_cmd LIKE 'find . -executable -type f -name %grep -l GNU Libtool%touch -r%'
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AND NOT p0_cmd LIKE 'modinfo -k%'
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AND NOT p0_cmd LIKE 'modprobe -ab%'
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AND NOT p0_cmd LIKE 'modprobe --all%'
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AND NOT p0_cmd LIKE '%modprobe aufs'
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AND NOT p0_cmd LIKE '%touch -r /tmp/cc%.o %'
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AND NOT p0_cmd LIKE '%modprobe overlay'
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AND NOT p0_cmd LIKE '%modprobe nf_nat_netbios_ns'
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AND NOT p0_cmd LIKE '%modprobe -va%'
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AND NOT p0_cmd LIKE 'pkill -f cut -c3%'
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AND NOT p0_cmd LIKE 'tail /%history'
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AND NOT p0_cmd LIKE '%/usr/bin/cmake%Socket%'
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AND NOT p0_name IN ('ar', 'cc1', 'compile', 'cmake', 'cc1plus')
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AND NOT exception_key IN ('bash,500,ninja,bash', 'ls,500,zsh,alacritty')
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