Running Trend Micro Antivirus
Scan your system with Trend Micro antivirus and delete all files detected as PHP_BIZAI.A. To do this, Trend Micro customers must download the latest pattern file and scan their system. Other Internet users can use HouseCall, Trend Micro?s free online virus scanner.
http://housecall.trendmicro.com/
http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=PHP_BIZAI.A
This malware is currently circulating in the wild. It is contained in compromised Web sites and uses a new CHM* exploit found in Internet Explorer. The exploit allows executable files to be downloaded and run in the background without user intervention.
Great, now to go read up on CHM exploits...

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