Pushdo is one of the top five networks of hacked computers responsible for most of the world’s spam. Researchers say they found that Pushdo had a special characteristic in that more than half of its command-and-control servers were concentrated within one hosting company. They uncovered some 78 GB of plain text e-mail addresses, and that up to 40 percent of the infected computers were in India. Pushdo’s operators will be able to use the remaining servers that are still online to reconstitute the botnet.”]
Source: https://www.csoonline.com/article/2125929/botnet-takedown-may-yield-valuable-data.html