Tsundere Botnet Expands Using Game Lures and Ethereum-Based C2 on Windows

The Hacker News

November 20, 2025 at 4:57 PM

Actively Exploited

Windows Malware Botnet Microsoft Kaspersky

Summary

The Tsundere botnet, targeting Windows users, is expanding and capable of executing arbitrary JavaScript code from a command-and-control server. This poses a significant threat to users, as the botnet's propagation methods remain unclear, indicating a potential for widespread exploitation.

Original Article Summary

Cybersecurity researchers have warned of an actively expanding botnet dubbed Tsundere that's targeting Windows users. Active since mid-2025, the threat is designed to execute arbitrary JavaScript code retrieved from a command-and-control (C2) server, Kaspersky researcher Lisandro Ubiedo said in an analysis published today. There are currently no details on how the botnet malware is propagated;

Impact

Windows users

In the Wild

Yes

Timeline

Ongoing since mid-2025

Remediation

Not specified

Read Original Article

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