Update: Facebook Security Fighting Koobface Worm, Chain Letters

As many users are aware, Facebook has been fighting mounting security threats in recent weeks. Developers and analysts alike want to know more about what’s happening and what Facebook is doing to contain the threats, so here’s the story:

The Problems

1. A variant of the Koobface worm, originally detected by Kapersky Lab a few weeks ago, has been increasingly spreading on Facebook in recent weeks. Here’s how it works:

Net-Worm.Win32.Koobface.b, which targets Facebook users, creates spam messages and sends them to the infected users’ friends via the Facebook site.

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