212 lines
6.4 KiB
SQL
212 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 extra
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-- platform: linux
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-- interval: 600
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SELECT -- Child
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pe.path AS p0_path,
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pe.time AS p0_time,
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pe.uptime AS p0_uptime,
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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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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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LEFT JOIN processes p ON pe.pid = p.pid -- 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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AND pe1.cwd != ""
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LEFT JOIN hash pe_hash1 ON pe1.path = pe_hash1.path -- 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 != ""
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AND pe1_pe2.cwd != ""
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WHERE
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pe.time > (strftime('%s', 'now') -600)
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AND pe.cmdline != ""
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AND pe.cwd != ""
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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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) -- Chrome Stealer
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OR p0_cmd LIKE '%chrome%-load-extension%' -- Known attack scripts
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OR p0_name LIKE '%pwn%'
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OR p0_name LIKE '%attack%' -- 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 '%tar % .%'
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OR p0_cmd LIKE '%tar %/.%'
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OR p0_cmd LIKE '%.config%gcloud%'
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OR p0_cmd LIKE '%.aws/%'
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OR p0_cmd LIKE '%.config/%chrome%'
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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 '%nohup /bin/bash%'
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OR p0_cmd LIKE '%echo%|%base64%-d% %|%'
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OR p0_cmd LIKE '%@reboot%crontab%'
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OR p0_cmd LIKE '%UserKnownHostsFile=/dev/null%' -- 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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OR p0_cmd LIKE '%/dev/%cp/%'
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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 pe.uptime < 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 -- %/gitstatus.POWERLEVEL9K%.fifo'
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OR p0_cmd LIKE '%/p10k.%'
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)
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)
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AND NOT p0_cmd IN (
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'lsmod',
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'dd if=/dev/stdin conv=unblock cbs=79',
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'/usr/bin/socat STDIN UNIX-CONNECT:/run/user/1000/kwallet5.socket',
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'socat STDIN UNIX-CONNECT:/run/user/1000/kwallet5.socket'
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)
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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 '%/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 (
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'bash,500,ninja,bash',
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'grep,500,fish,konsole',
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'tar,0,incusd,systemd',
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'bwrap,500,melange,dash',
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'ls,500,zsh,alacritty',
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'nc,500,fish,konsole',
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'kmod,0,incusd,systemd',
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'chrome_crashpad_handler,500,systemd,systemd',
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'bash,0,bash,containerd-shim-runc-v2'
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)
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