In the aftermath of September 11th, security issues came into the limelight; everybody focalized their attention on increasing anti-terrorist measures and countering the increasing number of hacker attacks to business and government networks but hardly anyone has ever mentioned a more insidious and widespread criminal activity: industrial espionage. Today companies can rely on cyber-based techniques and methodologies to react to attacks coming from the real world. 1) Introduction: old and new threats after September 11th 2) Industrial Espionage: state-sponsored espionage 3) Cyber defense methodology: from digital identification of attacker to counterattack strategy 4) Cyber counterattacks: information leakage, Injected Interception