A predatory cyber-attack on a business' computer system violates federal criminal laws, including 18 U.S.C. 1030. The U.S. Department of Justice wants victims to report these criminal intrusions.
Who to notify may vary depending on the exact facts of your intrusion. As the Department of Justice states on its website:
The primary federal law enforcement agencies that investigate domestic crime on the Internet include: the Federal Bureau of Investigation (FBI), the United States Secret Service, the United States Immigration and Customs Enforcement (ICE) , the United States Postal Inspection Service, and the Bureau of Alcohol, Tobacco and Firearms (ATF) . Each of these agencies has offices conveniently located in every state to which crimes may be reported. Contact information regarding these local offices may be found in local telephone directories. In general, federal crime may be reported to the local office of an appropriate law enforcement agency by a telephone call and by requesting the "Duty Complaint Agent.
Each law enforcement agency also has a headquarters (HQ) in Washington, D.C., which has agents who specialize in particular areas. For example, the FBI and the U.S. Secret Service both have headquarters-based specialists in computer intrusion (i.e., computer hacker) cases.
As a victim, you have enforceable rights, including the right to restitution. It is important to seek legal counsel to help sort out exactly who to notify and act as your liaison to these federal agencies. Don't miss out on getting what you are legally entitled to receive.