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Data Theft Repackaged: A Case Study in Malicious Wrapper Packages on npm
The Socket Research Team breaks down a malicious wrapper package that uses obfuscation to harvest credentials and exfiltrate sensitive data.
Burro is a useful creature that auto-packages objects in length-prefixed JSON byte streams.
Burro is made up of 4 streams that makes sending/receiving objects a breeze
Sender streams:
Receiver streams:
var burro = require("burro"),
stream = require("stream");
// dummy network stream
var network = new stream.PassThrough();
// wrap! auto encode/decode json frames
var socket = burro.wrap(network);
// send data
socket.write({message: "どもうありがとう!", from: "japan", to: "usa"});
socket.write({message: "thank you!", from: "usa", to: "japan"});
// dummy parser; extracts message from payload
var parser = new stream.Transform({objectMode: true});
parser._transform = function _transform (obj, encoding, done) {
this.push(obj.from + " says: " + obj.message + "\n");
done();
};
// cross the streams!
socket.pipe(parser).pipe(process.stdout);
Output
japan says: どもうありがとう!
usa says: thank you!
Available via npm:
$ npm install burro
Or via git:
$ git clone git://github.com/naomik/burro.git node_modules/burro
wrap
This is burro's easy mode. It will automatically construct the entire burro chain around your existing duplex stream. If you want to configure the burro chain manually, please see lib/burro.js
var socket = burro.wrap(duplexStream);
Arguments
stream.Duplex
API. It must have
the following functions defined: _read
, _write
, pipe
, unpipe
.Burro is a pretty versatile beast and can even handle very large payloads. It is also tested against network packet fragmenting and buffering, thanks to hiccup. See the tests for more details.
Development dependencies:
$ npm install mocha
$ npm install hiccup
FAQs
auto-packaged, length-prefixed JSON byte streams
The npm package burro receives a total of 9 weekly downloads. As such, burro popularity was classified as not popular.
We found that burro demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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