Company Symantec warned the users of most popular email of the world - Yahoo Mail about the appearance of worm Yamanner. It moves in the form of message with the title 'New Graphic Site'. Harmful module uses vulnerability in JavaScript and, after getting on computer, it sends itself to all addresses in the list of contacts, and also sends away the list of addresses to the remote server - it is used to collect emails to send spam. At present vulnerability is already disabled, and to all users of Yahoo was sent the update. However, Yahoo and Symantec indicate that in spite of this, the users must compulsorily watch that their antiviral bases did not grow antiquated. Accordingly to statistics from Symantec, worm was sent out more than 100 thousand times.