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Cybercrime is thriving like never before, with hackers launching attacks ranging from absurd ransomware demands of $1 trillion to large-scale theft of personal data. Despite efforts from Microsoft, Google and even the FBI, these threat actors continue to outpace defences.

A new report by Group-IB has analysed over 1,500 cybercrime investigations to uncover the most active and dangerous hacker groups operating today.

Rather than fading away after arrests or infighting, many cybercriminal gangs are re-emerging stronger than before.

Group-IB’s May 2025 report highlights a troubling increase in key attack types across 2024 — phishing rose by 22%, ransomware leak sites by 10%, and APT (advanced persistent threat) attacks by 58%. The United States was the most affected country by ransomware activity.

At the top of the cybercriminal hierarchy now sits RansomHub, a ransomware-as-a-service group that emerged from the collapsed ALPHV group and has already overtaken long-established players in attack numbers.

Behind it is GoldFactory, which developed the first iOS banking trojan and exploited facial recognition data. Lazarus, a well-known North Korean state-linked group, also remains highly active under multiple aliases.

Meanwhile, politically driven hacktivist group NoName057(16) has been targeting European institutions using denial-of-service attacks.

With jurisdictional gaps allowing cybercriminals to flourish, these masked hackers remain a growing concern for global cybersecurity, especially as new threat actors emerge from the shadows instead of disappearing for good.

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