Marshal8e6 researchers took closer look at SPAM originated from Botnets, here are some points came out of the research:
- An infected machine within some botnets are capable of sending 25,000 SPAM message per hour.
- Almost 75% of overall spam messages are coming from only 4 botnets.
- The largest source of spam is Rustock botnet, and it is active for more than 2 years.
- The research is looking at the big 10 SPAM botnets (Rustock, MEGA-D, Pushdo, XARVESTER, GRUM, Donbot, Gheg, Bobax, Srizbi, Waledac) with more details here.