The world's largest botnet, Zeus, has had its traffic disrupted by repeated disconnections of a Kazakhstani ISP, but a series of reconnections has revived its banking Trojan activity, according to security researchers.
The botnet mainly pushes out the Zeus banking Trojan, an information-stealing keylogger that relays sensitive data back to its controllers. The Kazakhstani Internet service provider AS Troyak provides network connectivity to six other ISPs that host Zeus botnet command-and-control servers. On Wednesday, the upstream connectivity to AS Troyak was cut by unidentified agents.
This disconnection resulted in the shutdown of 25 percent of the Zeus botnet, said … Read more