"Security researchers have released a proof-of-concept rootkit for
Windows 7, in the hopes that its availability will assist in the prompt
development of an antidote.
Indian security researchers Vipin Kumar and Nitin Kumar demonstrated
the toolkit, dubbed Vbootkit 2.0, at the Hack In The Box security
conference in Dubai last month. Initially the security boffins wanted
to keep the code under wraps, in case malicious hackers latched onto
the approach.
They've since had second thoughts, prompting them to release the code
for Vbootkit 2.0 under an open source licence, in the belief that its
availability will assist the work of other security researchers."
Read more: http://www.theregister.co.uk/2009/05/08/win7_rootkit_poc/