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API Reference: Osquery Endpoint Monitoring

osquery.conf Structure

{
  "options": {
    "logger_plugin": "filesystem",
    "logger_path": "/var/log/osquery",
    "database_path": "/var/osquery/osquery.db",
    "worker_threads": "2"
  },
  "schedule": {
    "query_name": {
      "query": "SELECT * FROM processes;",
      "interval": 300,
      "description": "Description"
    }
  },
  "file_paths": {
    "category": ["/etc/%%", "/usr/bin/%%"]
  }
}

Key Osquery Tables

Table Description
processes Running processes (pid, name, path, cmdline, uid)
listening_ports Open listening ports (pid, port, protocol)
process_open_sockets Active network connections
crontab Cron job entries
suid_bin SUID/SGID binaries
file File metadata (path, size, mtime, sha256)
kernel_modules Loaded kernel modules
authorized_keys SSH authorized keys
startup_items Startup/login items
shell_history Shell command history

Result Log Format (JSON Lines)

{"name":"query_name","action":"added","columns":{"pid":"1234","name":"suspicious"},"unixTime":"1705312200"}
  • action: "added" (new row) or "removed" (row disappeared)
  • columns: query result columns as key-value pairs

osquery CLI

osqueryi "SELECT * FROM processes WHERE name = 'nc';"
osqueryctl start   # Start daemon
osqueryctl config-check  # Validate config