Researchers from the security vendor AppRiver indicate the malware spam operation began on Friday, May 6, and is still actively delivering the fake update alerts.
The emails contain the subject line “URGENT: Critical Security Update“, and the following message:
The Security Update is to prevent malicious users from getting access to your computer files. The update applies to the following OS versions: Microsoft Windows 98, Microsoft Windows 2000, Microsoft XP, Microsoft Windows 7.
Please notice, that present update applies to high-priority updates category. In order to help protect your computer against security threats and performance problems, we strongly recommend you to install this update.
If you’re still using Windows XP, Microsoft has a piece of security advice for you: don’t hit F1.
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