[image credit: m86security]

About a year ago, The Digital Crimes Unit at Microsoft Corporation (NASDAQ:MSFT) took down the botnet Waledac as part of an operation called “Operation b49.” Recently they have taken down one of the most complex botnets called Rustock Botnet.

[image credit: m86security]

The amount of junk e-mail being sent out plummeted today as the result of a coordinated takedown of the Rustock botnet. Rustock is one of the largest spam-generating programs. Rustock generally pushed online pharmacy and male enhancement pills into people’s inboxes. Apparently the servers used for coordinating these spam messages stop operating all at once.