News Item

Cross-browser Worm Spreads via Facebook, Security Experts Warn

By: Lucian Constantin, PC World

Malware writers have used Crossrider, a cross-browser extension development framework, to build a click-fraud worm that spreads on Facebook, security researchers from antivirus firm Kaspersky Lab said on Monday.

Crossrider is a legitimate Javascript framework that implements a unified API (application programming interface) for building Mozilla Firefox, Google Chrome and Internet Explorer extensions.

The API allows developers to write code that will run inside different browsers and, by extension, on different OSes. The framework is still in beta testing and its creators plan on adding support for Safari soon.

"It is quite rare to analyze a malicious file written in the form of a cross-platform browser plugin. It is, however, even rarer to come across plugins created using cross-browser engines," said Kaspersky Lab malware expert Sergey Golovanov in a blog post on Monday.

Read more...