Are you one of the more than 300 million active users of Facebook?

If you are, then be very careful if you receive an unsolicited email claiming to come from

"The Facebook Team" <service@facebook.com>

which tells you that they have changed your password:

The emails, which all have the subject line "Facebook password resent confirmation email.", claim that the recipient's new password is contained in the attached file (named Facebook_Password_4cf91.zip).

The reality, of course, is that these emails are not really from Facebook and have been spammed out widely across the internet. The "from" address has been forged, and the attached file is in fact a piece of malware. (Sophos detects the malware as Troj/BredoZp-M or Mal/Bredo-A)

Don't make life easy for the hackers hell-bent on infecting your computer, stealing your identity and emptying your bank account - exercise caution when you receive unsolicited emails and protect your computer with up-to-date security software.

If you're a regular user of Facebook, be sure to join the Sophos page on Facebook to be kept informed of the latest security threats.