162 lines
3.9 KiB
SQL
162 lines
3.9 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: 30
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SELECT
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p.pid,
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p.path,
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TRIM(
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REPLACE(
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p.path,
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RTRIM(p.path, REPLACE(p.path, '/', '')),
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''
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)
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) AS basename,
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-- On macOS there is often a trailing space
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TRIM(p.cmdline) AS cmd,
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p.mode,
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p.cwd,
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p.euid,
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p.parent,
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pp.cgroup_path,
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hash.sha256,
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pp.path AS parent_path,
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pp.name AS parent_name,
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TRIM(p.cmdline) AS parent_cmd,
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pp.euid AS parent_euid,
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phash.sha256 AS parent_sha256
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FROM
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uptime,
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process_events p
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LEFT JOIN processes pp ON p.parent = pp.pid
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LEFT JOIN hash ON p.path = hash.path
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LEFT JOIN hash AS phash ON pp.path = phash.path
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WHERE
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p.time > (strftime('%s', 'now') -30)
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AND (
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basename 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 cmd LIKE '%chrome%-load-extension%'
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-- Known attack scripts
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OR basename LIKE '%pwn%'
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OR basename LIKE '%attack%'
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-- Unusual behaviors
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OR cmd LIKE '%ufw disable%'
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OR cmd LIKE '%iptables -P % ACCEPT%'
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OR cmd LIKE '%iptables -F%'
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OR cmd LIKE '%chattr -ia%'
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OR cmd LIKE '%chmod %777 %'
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OR (
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INSTR(cmd, 'history') > 0
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AND cmd LIKE '%history'
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)
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OR cmd LIKE '%touch%acmr%'
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OR cmd LIKE '%touch -r%'
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OR cmd LIKE '%ld.so.preload%'
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OR cmd LIKE '%urllib.urlopen%'
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OR cmd LIKE '%nohup%tmp%'
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OR cmd LIKE '%iptables stop'
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OR cmd LIKE '%systemctl stop firewalld%'
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OR cmd LIKE '%systemctl disable firewalld%'
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OR cmd LIKE '%pkill -f%'
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OR (
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cmd LIKE '%xargs kill -9%'
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AND p.euid = 0
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)
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OR cmd LIKE '%rm -rf /boot%'
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OR cmd LIKE '%nohup /bin/bash%'
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OR cmd LIKE '%echo%|%base64 --decode %|%'
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OR cmd LIKE '%UserKnownHostsFile=/dev/null%'
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-- Crypto miners
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OR cmd LIKE '%monero%'
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OR cmd LIKE '%nanopool%'
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OR cmd LIKE '%nicehash%'
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OR cmd LIKE '%stratum%'
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-- Random keywords
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OR cmd LIKE '%ransom%'
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-- Reverse shells
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OR cmd LIKE '%/dev/tcp/%'
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OR cmd LIKE '%/dev/udp/%'
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OR cmd LIKE '%fsockopen%'
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OR cmd LIKE '%openssl%quiet%'
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OR cmd LIKE '%pty.spawn%'
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OR (
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cmd LIKE '%sh -i'
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AND NOT parent_name IN ('sh', 'java')
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)
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OR cmd LIKE '%socat%'
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OR cmd LIKE '%SOCK_STREAM%'
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OR INSTR(cmd, 'Socket.') > 0
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OR (
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cmd LIKE '%tail -f /dev/null%'
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AND 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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p.path IN ('/usr/bin/kmod', '/bin/kmod')
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AND parent_path = '/usr/lib/systemd/systemd'
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AND parent_cmd = '/sbin/init'
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)
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AND NOT (
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p.path IN ('/usr/bin/kmod', '/bin/kmod')
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AND parent_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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p.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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p.path = '/usr/bin/mkfifo'
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AND cmd LIKE '%/org.gpgtools.log.%/fifo'
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)
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AND NOT cmd LIKE '%modprobe -va%'
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AND NOT cmd LIKE 'modprobe -ab%'
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AND NOT cmd LIKE '%modprobe overlay'
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AND NOT cmd LIKE '%modprobe aufs'
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AND NOT cmd LIKE 'modprobe --all%'
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AND NOT cmd IN ('lsmod')
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-- Invalid command from someones tmux environment
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AND NOT cmd LIKE 'pkill -f cut -c3%'
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AND NOT cmd LIKE 'dirname %history'
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AND NOT cmd LIKE 'tail /%history'
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AND NOT cmd LIKE 'find . -executable -type f -name %grep -l GNU Libtool%touch -r%'
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AND NOT basename IN ('cc1')
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