VulnHub

This week, significant cybersecurity threats emerged as hackers exploited new 0-day vulnerabilities in Fortinet and Chrome, infiltrating supply chains and SaaS tools. The rapid response from major companies like Microsoft, Salesforce, and Google highlights the severity of these attacks and the ongoing challenges in securing trusted applications and software updates.

CISA has identified that various cyber threat actors are using commercial spyware to target users of mobile messaging applications, employing tactics such as phishing, zero-click exploits, and impersonation. The focus is primarily on high-value individuals including government and military officials, indicating a serious threat to sensitive communications.

The ShadowPad malware is exploiting a recently patched vulnerability in Microsoft Windows Server Update Services (WSUS), identified as CVE-2025-59287, allowing attackers to gain full system access. This exploitation highlights the critical need for organizations to promptly apply security updates to vulnerable systems to prevent unauthorized access.

APT24, a China-nexus threat actor, has been deploying a new malware called BADAUDIO to maintain persistent access to compromised networks over a nearly three-year espionage campaign. This shift to more sophisticated attack vectors poses significant risks to targeted entities, particularly in Taiwan and over 1,000 domains.

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.

The 'Eternidade' Trojan is a sophisticated infostealer targeting Brazilian Portuguese speakers, designed to phish banking credentials and steal sensitive data. Its self-propagating nature and unique features tailored for Brazilian users pose significant cybersecurity threats across the region.

Kaspersky GReAT experts have identified the Tsundere botnet, which utilizes Node.js-based bots to exploit web3 smart contracts. The campaign poses a significant cybersecurity threat as it spreads through MSI installers and PowerShell scripts, indicating a sophisticated method of propagation.

The TamperedChef malware campaign exploits fake software installers to distribute JavaScript malware, enabling remote access and control of infected systems. This ongoing global threat poses significant risks to users who may unknowingly install these malicious applications.