Alex Cox, a research consultant and principal analyst at the IT security firm NetWitness, discovered last month the Kneber botnet, a variant of the ZueS Trojan that he says has infested 75,000 systems in 2,500 corporate and governmental organizations worldwide. (See Botnet Strikes 2,500 Organizations Worldwide.)

In an interview, Cox describes:

• How the Kneber botnet works.

Cox was interviewed by Eric Chabrow, GovInfoSecurity.com managing editor.