Hi Spyros,
A new variant of the Stration or Warezov family “Stration DS” has been spotted in great numbers, actually an all high toppling Netsky P from number one ever to second place. Stration first spotted in Thailand, now has been seen in 91 countries in the world, and the first variant had over a 100.000 spottings.
These numbers are achieved because the new varieties are being spawn from already infected machines, adding to the effect this cybergang is after.
See statistics here: http://www.fortinet.com/FortiGuardCenter/advisory/FG-2006-29.html
It shows worm-spreading is becoming more and more aggresive.
Also our member NickGolovko reported on the Warezov family, that is why these addenda.
polonus