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Microsoft's other takedown action
This ars technica article describes how Microsoft took down the control structure for the Waledac botnet. "By obtaining the restraining order, this command-and-control system was disrupted; with the domain names offline, the machines in the botnet were no longer able to locate their control servers, rendering them mostly harmless. The court action had to be taken in secret to avoid warning the botnet's operators; with sufficient warning, they might have been able to set up new domain names and new control systems, thereby circumventing Microsoft's efforts. The names have now been offline for three days, presumably sufficient to cause permanent disruption, and the injunction is now public."
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