Simple JavaScript extension manager for Osquery

Custom tables can be implemented in JavaScript and added to Osquery using extension manager.

Custom tables must extend TablePlugin class. Example:

const { TablePlugin } = require('osquery-extension-manager');

class SampleTablePlugin extends TablePlugin {
  constructor() {
    super('sample', {foo: 'TEXT', bar: 'INTEGER'});
  }

  generate() {
    // Integers should also be returned as string
    return [
      {foo: 'Hello', bar: '1'},
      {foo: 'World', bar: '2'}
    ];
  }
}

TablePlugin constructor should be called with the unique table name and the column metadata map. Custom table should implement generate method which should return the table rows as array of map's.

Any number of custom plugins can be implemented and added to extension manager using addPlugins method. start method can be used to start the extension manager:

const { addPlugins, start } = require('osquery-extension-manager');

addPlugins(new SampleTablePlugin());
start();

If socketPath argument is not provided to start method, extension manager tries to communicate with osqueryd daemon UNIX domain socket at /var/run/osquery.em. If that does not exist, it falls back to using .osquery/shell.em in current users HOME directory.

Osquery daemon or Osquery shell should should be started with --nodisable_extensions flag to enable extension support.

$ osqueryi --nodisable_extensions
osquery>

$ node examples/sample-table.js

osquery> select * from sample;
+-------+-----+
| foo   | bar |
+-------+-----+
| Hello | 1   |
| World | 2   |
+-------+-----+

In addition to custom tables, extension manager can also be used to communicate with Osquery. Once started, it can list extensions (listExtensions), get flags (getFlags), query tables (query) or get column metadata for a query (getQueryColumns).

Examples

• Simple table that always returns two rows
• AWS EC2 tables that exposes EC2 instances, subnets, volumes, VPCs as Osquery tables