Virus has managers working all Knight

A virus dubbed Sir Cam has the potential to cause sleepless nights by mailing your personal documents to all your friends.

The virus is reportedly hitting Windows machines and rifling through the My Documents folder. It grabs a file at random and then posts it to every address in your Outlook address book, with the potential for disastrous consequences.

An internal customer document could be sent to a competitor, an appraisal form could be emailed to a colleague, or your porn collection could end up in your friends' inboxes.

"Sir Cam is a threat to be taken seriously," said Jonathan Tait of security company Baltimore. "Its stealing methods are so well disguised, that even the most vigilant individuals or businesses could be fooled."

He added that companies need to have a clear policy regarding email communication on which staff are educated.

The virus arrives as an email with the same subject line as the attached file pulled from the last victim. The message body contains a random string of words in either English or Spanish, from a small collection of phrases embedded in the code.

Most antivirus companies have released an update to tackle Sir Cam.