The e-mails have a subject line that says "iPad Software Update" and offer a link to a Web page that looks like a legitimate iTunes download page, according to BitDefender. Instead, the link installs malware identified as Backdoor.Bifrose.AADY, according to the BitDefender blog.
The malware injects itself in to the "explorer.exe" process and opens up a back door that attackers can use to take control of the system whenever they want, the post said. It also attempts to read the keys and serial numbers of the various software programs installed on the computer and logs passwords to the victim's ICQ, Messenger, and POP3 mail accounts, and protected storage, BitDefender said.
For more on this story, read iPad users on Windows targeted with malware on CNET News.