South Korea's Cyber Intrusions Double in 10 Years, But Arrest Rate Sits at a Meager 21.8%

South Korea’s digital defenses are showing cracks. The number of sophisticated cyber intrusions, including hacking and DDoS attacks, has nearly doubled over the past decade, but the real story is in who isn't getting caught. With a startlingly low arrest rate, the nation faces a growing gap between the frequency of attacks and its ability to respond.

A Decade of Escalating Threats

According to government data released on December 26, 2025 by the Ministry of Data and Statistics, the number of cyber intrusion incidents reached 4,526 in 2024. That's a 7.2% increase from the 4,223 cases reported in 2023. When compared to the 2,291 cases a decade earlier in 2014, the total has almost doubled, painting a grim picture of the country's cybersecurity landscape.

Attackers Outpacing Law Enforcement

The problem isn't just the volume of attacks; it's the difficulty in bringing perpetrators to justice. The arrest rate for these crimes was just 21.8% in 2024. This figure stands in stark contrast to the 52.1% arrest rate for other cyber offenses like phishing and online fraud. It's a clear indicator that the sophisticated, often cross-border nature of hacking and DDoS attacks makes them significantly harder to investigate and prosecute.

A change in policy may also be contributing to the statistical surge. A 2023 legal amendment now requires private companies to report any intrusion incidents to the Korea Internet & Security Agency (KISA) or the Ministry of Science and ICT within 24 hours. The statistics ministry noted that this mandatory reporting led to a sharp increase in official reports, suggesting that the problem was likely just as severe before but largely underreported.