GWguy
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Make sure your systems are patched with MS08-067.
Downadup virus exposes millions of PCs to hijack - CNN.com
Downadup virus exposes millions of PCs to hijack - CNN.com
How does it spread?
The worm does not spread over email or the Web. However if an infected laptop is connected to your corporate network, it will immediately scan the network looking for machines to infect. These will be machines that have not installed a patch from Microsoft known as MS08-067. The worm will also scan company networks trying to guess your password, trying hundreds and hundreds of common words. If it gets in, even if you are not at your machine, it will infect and begin spreading to other servers. A third method of spreading is via USB data sticks.