cybercrime
Any of a broad range of activities that use computers or networks to commit illegal acts, including theft of personal data, phishing, distribution of malware, copyright infringement, denial of service attacks, cyberstalking, bullying, online harassment, child pornography, child predation, stock market manipulation and corporate espionage.
For example, a vulnerability in a victim's web browser might result in him unknowingly downloading a Trojan horse virus, which installs a keystroke logger on his computer, which allows the cracker to steal private data such as Internet banking or e-mail passwords.
The degree to which an activity counts as "cybercrime" rather than just "crime" depends on whether they could exist without computers or networks.