Storm Worm Rising

The Storm worm has been an increasing problem in the last few months, but a change in tactics may mean something big is going to happen. The article discusses a bit of back story about the worm, including the somewhat frightening numbers about the millions of spam emails carrying the worm payload. They estimate between a quarter and a million infected systems usable for spam or DDOS attacks.

Comments

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[tttonyyy]

Now I've got your attention worm style, click this link for more information:

http://en.wikipedia.org/wiki/Storm_Worm

Re:How are these numbers calculated?

[httptech]

The estimate is based on the number of unique IPs we've seen attacking networks we monitor, coupled with our knowledge of how the Storm botnet works. We've seen up to 100,000 bots sending the attack (the ecard spam) in a single day. Storm is a multi-tiered botnet, meaning that not all the bots are tasked with sending the emails. Some are supernodes (first-tier), designed to serve up the ecard executables via HTTP and facilitate communication between the regular (second-tier) nodes. Another factor is that some second-tier nodes will never be seen attacking, since they may be behind firewalls that block port 25 outbound or at an ISP that is doing SMTP blocking, so they may be part of the botnet but difficult to count.

In reality, the only source that can give you a precise count for the Storm botnet is the Storm controller - and he/she's not talking. So we do the best we can at estimating its size given the data available.