Top 10 Most Common Federal Cybercrimes

 Posted on August 09, 2026 in Computer Crime

The term "cybercrime" covers much more than just computer hacking. It can include charges for fraud, stolen identities, ransomware, and more. A single federal cybercrime criminal investigation can lead to many different charges.

People usually don’t know that federal law enforcement is investigating them until agents arrive with a search warrant or make an arrest. By that point, the government may already have what they need to build their case.

Don’t talk to the feds without an experienced attorney on your side, even if you are completely sure you’re innocent. If federal agents have contacted you in 2026, a Chicago federal criminal defense attorney should be the first person you call.

What Are the Most Common Federal Cybercrime Charges?

Unauthorized Access to a Computer

"Unauthorized access" is what many people think of as "hacking." It involves getting into a computer system without permission, usually using stolen credentials.

Not every accusation of hacking means a crime was actually committed. A major issue is often whether the accused had permission to use the system and, if so, what that permission was actually for.

Computer Fraud

Computer fraud usually involves unauthorized access to accounts to get money, services, or valuable information. An employee, for example, might be accused of changing payment instructions or accessing customer accounts to steal money.

These cases often include both computer fraud and wire fraud charges. Prosecutors try to argue that the computer access was just one part of a larger plan.

Phishing and Business Email Compromise

Phishing is sending deceptive emails or messages to obtain passwords or financial information. Business email compromise generally involves impersonating a real person connected to a company to convince someone to transfer money or share sensitive information.

"Phishing" is usually not the formal name of the federal charge. Instead, prosecutors use wire fraud, computer fraud, identity theft, or conspiracy laws.

Identity Theft

Identity theft is when someone uses another person’s name, Social Security number, account credentials, tax information, or other private data.

However, the government must prove a connection between the person’s identity and the crime of identity theft. The mere presence of personal information in a device or account does not automatically prove identity theft.

Credit Card and Access-Device Fraud

Access-device fraud under 18 U.S.C. § 1029 is charged when someone steals and uses someone else’s:

• Credit card numbers
• Debit cards
• Account numbers
• Login credentials
• Personal identification numbers

The statutory definition is broad enough to cover many forms of electronic account access.

Ransomware and Cyber Extortion

Ransomware is software used to block access to data or encrypt a computer system until money is paid to the hacker. Some groups also threaten to release confidential data if the victim refuses to pay.

Federal authorities try to find and charge the people who write the malware, gain access to a victim’s system, communicate with victims, or move ransom payments.

Malware and Botnet Offenses

Malware is software designed to damage a system or create unauthorized access. A botnet is a network of infected devices that can be controlled remotely.

These cases can be extremely technical. The presence of software on a device does not always prove who installed it or whether the device’s owner knew about it and understood what it was doing.

Denial-of-Service Attacks

A denial-of-service attack attempts to make a website, server, or network unavailable by overwhelming it with traffic or requests. When many devices are used together, it is called a distributed denial-of-service, or DDoS, attack.

Theft of Data or Trade Secrets

Data and trade secret theft charges are brought when an employee or former employee is accused of downloading confidential business information and sharing it with unauthorized parties.

Federal trade secret theft may be prosecuted under 18 U.S.C. § 1832. The law requires proof that the accused person purposefully took a trade secret connected to interstate or foreign commerce and knew that this would harm its owner. Not every confidential document qualifies as a trade secret, however.

Illegal Interception and Cyberstalking

Some federal cybercrime cases involve secretly monitoring another person or using the internet to threaten or harass someone. Illegal interception is when someone eavesdrops or "bugs" someone else’s conversations without them knowing. This includes electronically monitoring messages.

Cyberstalking is when someone uses the internet to harass or intimidate someone, especially if they do it to make someone fear death or serious injury. To become federal, these crimes must cross state borders; however, given the wide use of the internet, that standard usually isn’t hard to meet.

What Should You Do if Federal Agents Contact You?

You do not have to answer questions immediately. Agents will often say they only want to hear your side, but they aren’t your friend. Even a "casual conversation" can become evidence, and prosecutors are very good at weaving traps for unsuspecting people who accidentally incriminate themselves.

If you find out you’re under federal investigation, don’t do anything to destroy evidence. Don’t contact anyone who might be a witness or a victim. Those actions may be interpreted as obstruction and could get you into further trouble.

Instead, work with a lawyer to contact investigators and find out whether you are considered a witness, a target of investigation, or something else. If you’re arrested and charged, your lawyer will help you try to get out on bail and start looking for ways to fight the charges.

Call a Chicago Federal Cybercrime Defense Attorney Today

Federal cybercrime cases are highly technical and often involve not only federal law, but criminal law in several states. The Chicago federal computer crime lawyer at the Law Offices of Hal M. Garfinkel LLC, Chicago Criminal Defense Attorney has nearly 20 years of experience focused specifically on federal criminal cases.

We are available 24 hours a day. We offer weekend and evening appointments, off-site consultations, jail and police-station visits, and representation at bail and bond hearings. Call 312-629-0669 to schedule a free consultation.