Find notable cyber news and cases, enriched with sources, timelines, and signals.
Home Watchlists Beta Browse News Feed Stats About Contact

Tsundere botnet expanding on Windows

Malware Activity
First reported
Last updated
Happening score
H score 23
1 unique sources, 1 articles

Summary

Hide ▲

The Tsundere botnet is actively expanding against Windows users, and its operators can make infected systems run arbitrary JavaScript from a command-and-control server. That matters because the malware combines persistence, remote execution, and flexible infrastructure rotation to keep infected hosts useful over time. The operation also uses game-themed lures and installer/script-based delivery to reach victims.

Related Happenings

QuimaRAT cross-platform Java MaaS remote access trojan

Malware Activity
H score29 First: 06.07.2026 11:13 Last: 06.07.2026 11:13 Sources 1

About this happening: A new QuimaRAT MaaS offering expands cross-platform malware risk by packaging a modular Java-based RAT for Windows, Linux, and macOS. The activity matters because...

Open Happening

Silent Swap browser-extension crypto-theft campaign

Campaign
H score36 First: 30.06.2026 18:40 Last: 30.06.2026 18:40 Sources 1

About this happening: The Silent Swap campaign is replacing copied cryptocurrency wallet addresses with attacker-controlled ones, creating a risk of permanent financial loss for crypto users. I...

Open Happening

Malicious npm packages delivering Windows RAT

Malware Activity
H score3 First: 23.06.2026 11:54 Last: 23.06.2026 11:54 Sources 1

About this happening: A set of malicious npm packages is delivering a Windows-based RAT through a multi-stage install chain, creating risk of credential theft, host profiling, and *...

Open Happening

Microsoft AutoGen Studio AutoJack MCP WebSocket command execution security flaw

Vulnerability
H score33 First: 22.06.2026 20:28 Last: 22.06.2026 20:28 Sources 1

About this happening: Microsoft’s AutoJack chain exposed AutoGen Studio to arbitrary command execution for developers building from the main GitHub branch before the hardening commit.

Open Happening

Easy-day-js malware delivery through poisoned Mastra packages

Malware Activity
H score29 First: 22.06.2026 14:30 Last: 22.06.2026 14:30 Sources 1

About this happening: A poisoned Mastra package chain delivered malware through easy-day-js, creating compromise risk across Windows, MacOS and Linux systems. The payload disabled TLS...

Open Happening

Timeline

  1. 20.11.2025 18:57 1 articles · 7mo ago

    Ethereum smart contract used for Tsundere C2 resolution

    Technical Analysis Update

    A smart contract created on September 23, 2024 is used by Tsundere to fetch WebSocket C2 details, including ws://193.24.123[.]68:3011 and ws://185.28.119[.]179:1234, so the operators can rotate infrastructure by changing the contract-backed pointer.

    Show sources
    Open in new tab
  2. 20.11.2025 18:57 2 articles · 7mo ago

    Kaspersky warns of expanding Tsundere botnet on Windows

    Initial Disclosure

    Kaspersky warned on November 20, 2025 that Tsundere is actively expanding against Windows users and can execute arbitrary JavaScript retrieved from C2 after infection paths that include fake MSI installers, PowerShell scripts, Node.js, ws, ethers, and pm2; the analysis also noted registry-based persistence, game-themed lures, Russian-language logging code, and a server linked to 123 Stealer.

    Show sources
    Open in new tab