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Cybercrime includes illegal digital activity such as hacking, fraud, and extortion, posing risks to data, systems, finances, and public safety.

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Cybercrime involves illegal activities conducted using computers or networks, such as hacking, identity theft, financial fraud, and distribution of malware. These crimes exploit vulnerabilities in software, hardware, or human behavior to gain unauthorized access, steal data, or disrupt services. Understanding the methods and motives behind cybercrime is essential for identifying relevant threats and attack vectors.

For security practitioners, cybercrime highlights the importance of protecting critical systems against exploitation through strong access controls, timely patching of vulnerabilities, and user awareness training to prevent social engineering attacks. Monitoring for indicators of compromise and analyzing threat intelligence related to cybercriminal tactics can improve detection and mitigation efforts. Effective defense requires a focus on both technical safeguards and operational readiness to respond to evolving criminal techniques.

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Krebs on Security 11 months, 1 week ago

KrebsOnSecurity in New ‘Most Wanted’ HBO Max Series

A new documentary series about cybercrime airing next month on HBO Max features interviews with Yours Truly. The four-part series follows the exploits of Julius Kivimäki, a prolific Finnish hacker recently convicted of leaking tens of thousands of patient records from an online psychotherapy practice while attempting to extort the clinic and its patients.

Krebs on Security 11 months, 1 week ago

Who Got Arrested in the Raid on the XSS Crime Forum?

On July 22, 2025, the European police agency Europol said a long-running investigation led by the French Police resulted in the arrest of a 38-year-old administrator of XSS, a Russian-language cybercrime forum with more than 50,000 members. The action has triggered an ongoing frenzy of speculation and panic among XSS denizens about the identity of the unnamed suspect, but the consensus is that he is a pivotal figure in the crime forum scene who goes by the hacker handle "Toha." Here's a deep dive on what's knowable about Toha, and a short stab at who got nabbed.