Spam Bots ...
Great story and explanation at eWeek about a recent deluge of spam that has been arriving in many e-mail inboxes around the world the past few months: 'Pump-and-Dump' Spam Surge Linked To Russian Bot Herders.
For starters, the Trojan comes with its own anti-virus scanner--a pirated copy of Kaspersky's security software--that removes competing malware files from the hijacked machine. Once a Windows machine is infected, it becomes a peer in a peer-to-peer botnet controlled by a central server. If the control server is disabled by botnet hunters, the spammer simply has to control a single peer to retain control of all the bots and send instructions on the location of a new control server.
The bots are segmented into different server ports, determined by the variant of the Trojan installed, and further segmented into peer groups of no more than 512 bots. This allows the hackers to keep the overhead involved in exchanging information about other peers to a minimum, Stewart explained.




