10 arrested in international cybercrime ring Individuals from Bosnia and Herzegovina, Croatia, Macedonia, New Zealand, Peru, Britain and the U.S. were arrested in an operation carried out with the assistance of the Facebook social network and numerous international law enforcement agencies, the FBI said. Botnets, short for robot network, are made up of compromised computer systems and can be used by cybercriminals to execute denial of service attacks, send spam emails and conduct underground organized criminal activity, to include malware distribution, the FBI said.