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Security Solutions Team

CISO Daily Digest: Dutch Authorities Dismantle 17 Million-Device Botn (20260531)

Key cybersecurity events and threats as of May 31, 2026

CISO Daily Digest Cybersecurity Threat Intelligence

Dutch Authorities Dismantle 17 Million-Device Botnet

Dutch law enforcement has dismantled a massive botnet network comprising approximately 17 million infected devices worldwide. The operation, coordinated by the Dutch police, targeted the infrastructure behind the botnet that was being used for proxy services, enabling cybercriminals to route malicious traffic through compromised devices. The takedown represents one of the largest botnet disruptions in recent years, demonstrating the ongoing effectiveness of international law enforcement cooperation in combating large-scale cybercrime operations.

🔗 參考資料: 綜合報導(The Hacker News

本週活躍威脅

📌 Fake Anthropic Sites Deliver Fileless Infostealer to Claude Code Users

Threat actors are distributing fileless infostealer malware through fake Anthropic websites targeting Claude Code users. The campaign leverages the popularity of Anthropic’s AI coding tools to trick developers into downloading malicious payloads that steal credentials, API keys, and other sensitive data without leaving traditional file traces on disk.

🔗 Reference: Hackread

📌 Hackers Exploit AI Chatbots and Fake System Tools for Cryptomining Attacks

Attackers are leveraging fake system tool downloads and abusing AI chatbot platforms to distribute cryptomining malware. The campaign involves social engineering victims into installing seemingly legitimate utilities that quietly deploy cryptocurrency miners in the background.

🔗 Reference: iThome