When a small phishing gang decides to upgrade its infrastructure, it is often done in a quick and dirty fashion. The transition is almost immediate, and often buggy and unprofessional. But what happens when a gang on the scale of the Rock Phish group decides to abandon its old methods and upgrade its botnet infrastructure? It is done slowly, smoothly but most importantly -- professionally.

The RSA FraudAction Research Labs recently gathered information that indicates major changes in the tactics employed by the Rock Phish gang. We have reason to believe that the gang is replacing its phishing infrastructure, and upgrading it to an advanced Fast-Flux botnet. We also believe that this new infrastructure belongs to none other than the infamous Asprox Botnet, which has recently been spreading itself using surges of SQL injection attacks...