There seems to be no stopping the Downadup Windows Server worm, which some reports are now saying is the worst malware outbreak for 5 years.

 The number of Windows computers infected with the worm - has more than trebled since last weekend to almost 9 million worldwide, from roughly 2.4 million last Thursday. 

The principal targets are corporate Windows servers belonging to small businesses who have not installed security updates released by Microsoft last October.  The worm also uses social engineering techniques to spread via USB flash drives.  

As mentioned in this blog before, this USB attack vector can be stopped with our Cruzer Enterprise secure USB flash drives with onboard anti-virus scanning.  We also recommend users install the relevant Microsoft patch against the vulnerability that the worm exploits.