Google accidentally sent out email containing a mass mailing worm to about 50,000 members of a discussion list focused on its Google Video Blog.
"On Tuesday evening, three posts were made to the Google Video Blog group that should not have been posted," Google said in a statement.
"Some of these posts may have contained a virus called W32/Kapser.A@mm – a mass mailing worm. If you think you have downloaded this virus from the group or an email message, we recommend you run your antivirus program to remove it," the statement read.
W32/Kasper.A@mm is better known as the Kama Sutra worm. Discovered in January of this year, it deletes files and Registry keys on affected systems. It's blocked by most antivirus software.
Google uses its Video Blog group to let subscribers know when "interesting and fun" videos have been highlighted on the Google Video Blog. Emails to the group's mailing list are posted by a handful of company employees, called the Google Video Team.
This team was responsible for sending out the malicious email, said Gabriel Stricker, a Google spokesman. Stricker did not have any more details on how the firm ended up distributing the worm code, but he said internal protocols are now in place to prevent this from happening again.