Websense Security Labs warns of a wave of attacks directed at people who use Microsoft's Outlook Web Access. According to company “it has seen upwards of 30,000 emails an hour directing users of the web-based email software to click on a link to update their mailbox settings as part of a 'security upgrade'. In fact, the link takes them to a site that contains malware. "The victim's domain name and email address are also used in a number of locations on the malicious site to make it that much more believable. The malicious site installs the Zbot Trojan on the computer, Websense's security research manager Patrick Runald said."