Most spam comes from just 6 botnets

Monday, March 17. 2008

Most spam comes from just 6 botnets

With the impact on Mega-D's operations, Srizbi has now taken over as the leader of the spam pack responsible for nearly 40% of spam. Srizbi is well known as a spamming Trojan, and an advanced one at that. As we reported here, lately Srizbi has been particularly active in distributing spam with URLs that link to websites hosting more copies of the spambot. Analysis of Srizbi indicates it is extremely stealthy, operating in full kernel mode, which, among other things, allows it to hide its network activities and bypass sniffer tools. One interesting thing we noticed about Srizbi is that it provides continuous feedback and statistics to control servers about which email addresses were good, and which were bad.

via Slashdot