The FBI and the U.S. Justice Department (DOJ) said April 13 they have disabled a "botnet" of more than 2 million computers infected with malicious code that Eastern European cyber criminals may have used to drain millions of dollars from bank accounts around the world. U.S. authorities continue to combat the network of remotely controlled computers called the "Coreflood" botnet, which has secretly recorded computer users’ keystrokes to compromise vast amounts of banking and financial data. Coreflood is believed to have been operating since 2002 and has resulted in an unknown number of U.S. bank accounts being broken into with losses that could be in the hundreds of millions of dollars, according to FBI officials. DOJ and the FBI filed a civil complaint against 13 "John Doe" defendants, charging them with wire fraud, bank fraud, and illegal interception of electronic communications. The FBI and DOJ also have executed search warrants to seize Internet domain names believed tied to the control servers for the Coreflood program. Investigators received a temporary restraining order allowing them to seize control of the infected servers to try to further dismantle and disable the botnet.