Conficker worm gets an upgrade
The Conficker worm, which
infected millions of PCs last month, has received an upgrade which makes it much more effective.
The new variant, dubbed Conficker B++, has been redesigned to get around attempts to shut it down.
Previous versions checked for software updates from a list of 250 randomly generated URLs. But security companies managed to reverse engineer the algorithm that generated the URLs and design a way to block the software from updating. The new variant now uses a new set of backdoors to update itself.
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