Storm was a major botnet threat during its heyday in 2007, accounting for nearly a quarter of all of the spam on the Internet at its peak. But since the time it was crippled, Storm has been completely off the radar until earlier this week when researchers at The Honeynet Project did a detailed analysis of the new malware, which they said looked a lot like the original Storm code. The new version does not use the Overnet protocol that Storm used for P2P communications.
Source: https://threatpost.com/new-storm-variant-merely-spambot-experts-say-042910/73895/