The Trojan is responsible for controlling users' computers to form huge cyber-computer networks (botnets). Security experts confirmed that the number of malicious e-mail increased 1,700% in July directly related to Storm.

At the same time, Storm defeated the performance of the Sober worm, a dangerous software that has been around since 2003, and peaked in the mid-to-late 2005 through the spread of malicious e-mail messages with content. campaign in Germany or videos of actor Paris Hilton.

Storm became a images 1 US security firm MX Logic said that along with the strong development of phishing spam in the "pump-and-dump" stock market, Trojan Storm is making spam rise to an alarming level last month and the situation remains continue this month.

MessageLabs also affirmed that this is one of the most successful malicious programs they have ever recorded. The company found Storm began to operate strongly in late June when users' mailboxes were flooded with e-mail pretending to contain links to e-card pages. Due to the summer vacation, many people fell into the trap, giving Storm the opportunity to enroll the victim's PC into the botnet.