Security vendor Symantec has warned that the Storm worm, the malware which contributes to the Storm botnet, is continuing to evolve and now has two further possible avenues of attack.

A number of nascent Storm hosting domains using fast-flux techniques to mask their URLs have been identified by the security company, which issued a warning on Monday. Fast-flux service networks are networks of compromised computer systems with public DNS records that are constantly changing, making it more difficult to track and control criminal activities.

he Storm worm botnet, a network of compromised computers, has been estimated to control between one million and five million machines, which one researcher said makes it more powerful than IBM's Blue Gene/L supercomputer. The original Storm worm code, which appeared on 19 January, 2007, derived its name from the fact that the first spam linking to the malware coincided with a severe winter storm in Europe.