✄𐘗
text code block:
✄𐘗sequence by host.id with maxspan=1s
  [process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and
   process.parent.executable == "/usr/sbin/sshd" and not process.command_line like ("*ansible*", "*BECOME-SUCCESS*")] by process.entity_id
  [network where host.os.type == "linux" and event.type == "start" and event.action == "connection_attempted" and (
     process.executable like (
       "/tmp/*", "/var/tmp/*", "/dev/shm/*", "./*", "/run/*", "/var/run/*", "/boot/*", "/sys/*", "/lost+found/*",
       "/proc/*", "/var/mail/*", "/var/www/*", "/home/*", "/root/*" 
     ) or
     process.name like~ (
       // Hidden processes
       ".*",
       // Suspicious file formats
       "*.elf", "*.sh", "*.py", "*.rb", "*.pl", "*.lua*", "*.php*", ".js",
       // Scheduled tasks
       "systemd", "cron", "crond",
       // Network utilities often used for reverse shells
       "nc", "netcat", "ncat", "telnet", "socat", "openssl", "nc.openbsd", "ngrok", "nc.traditional"
     )
   ) and  
   not (
     destination.ip == null or destination.ip == "0.0.0.0" or cidrmatch(
       destination.ip, "10.0.0.0/8", "127.0.0.0/8", "169.254.0.0/16", "172.16.0.0/12", "192.0.0.0/24", "192.0.0.0/29",
       "192.0.0.8/32", "192.0.0.9/32", "192.0.0.10/32", "192.0.0.170/32", "192.0.0.171/32", "192.0.2.0/24",
       "192.31.196.0/24", "192.52.193.0/24", "192.168.0.0/16", "192.88.99.0/24", "224.0.0.0/4", "100.64.0.0/10",
       "192.175.48.0/24","198.18.0.0/15", "198.51.100.0/24", "203.0.113.0/24", "240.0.0.0/4", "::1", "FE80::/10",
       "FF00::/8", "172.31.0.0/16"
     ) or
     process.executable in ("/bin/yum", "/usr/bin/yum") or
     process.name in ("login_duo", "ssh", "sshd", "sshd-session", "sqlplus")
   )
  ] by process.parent.entity_id