data theft Archives

Tech Optimizer

May 21, 2026

Nvidia tells users to update GPU drivers now or face possible attack — here’s what we know

NVIDIA has released an update to its GPU display drivers that addresses 14 vulnerabilities across its product lines, including GeForce, RTX, Quadro, Tesla, NVS, vGPU, and Cloud Gaming software. The most critical vulnerability is CVE‑2026‑24187, a high-severity use-after-free bug rated 8.8 out of 10, which could allow code execution, privilege escalation, data theft, or system crashes. Linux systems are vulnerable due to improper access to GPU resources at the kernel level, while Windows systems are at risk from a timing flaw. Two vulnerabilities in NVIDIA’s Unified Virtual Memory subsystem on Linux could lead to denial-of-service attacks without elevated permissions. The vGPU software also received patches for vulnerabilities in its virtual GPU manager component. Users can download the updated drivers from the NVIDIA Driver Downloads page or the NVIDIA Licensing Portal, with Windows users needing version 569.49 or newer and Linux users needing version 590.48.01. Users are advised to maintain their antivirus programs for enhanced security. NVIDIA thanked external security researchers for their responsible disclosure of these vulnerabilities.

Winsage

May 15, 2026

Windows DNS Client Security Flaw Exposes Systems to Remote Code Execution

Windows systems are threatened by a vulnerability in the Windows DNS Client, identified as CVE-2026-41096, which allows remote code execution without user intervention. It has a CVSS base score of 9.8, indicating high severity. The flaw is a heap-based buffer overflow in the dnsapi.dll component, enabling unauthenticated remote attackers to execute arbitrary code. Exploitation requires sending a specially crafted DNS response to a vulnerable system, potentially leading to complete control over the host. Affected systems include supported versions of Windows 11 and Windows Server 2022/2025. Microsoft released security updates on May 12, 2026, and administrators are advised to apply these patches and reboot systems. Despite the severity, Microsoft currently classifies exploitation as “Exploitation Unlikely,” with no known public exploits or in-the-wild attacks.

Tech Optimizer

May 14, 2026

Avast Antivirus: Essential Protection for Devices Worldwide

Avast Antivirus offers a suite of cybersecurity features, including real-time malware defense, phishing protection, and performance optimization for Windows, Mac, Android, and iOS. It has over 150 million users globally and provides both free and premium plans. The software employs a multi-layered defense strategy, including behavior-based detection and cloud-assisted scanning, and can perform quick and deep scans for malware. Key features include a Wi-Fi Inspector, Software Updater, and mobile protection against harmful applications. Avast blocks over 1.5 billion attacks monthly and offers parental controls in premium plans. It serves users in over 170 countries, particularly in North America and Europe, and operates under Gen Digital, which is publicly traded on Nasdaq.

Winsage

May 13, 2026

Disgruntled researcher releases two more Microsoft zero-days

An anonymous researcher known as Nightmare-Eclipse has revealed two new vulnerabilities affecting Windows systems, named YellowKey and GreenPlasma, shortly after Microsoft's latest Patch Tuesday update. YellowKey is a "BitLocker bypass" that allows attackers with physical access to gain unrestricted shell access to protected machines. Experts have expressed concerns about YellowKey's potential to transform laptop theft into a serious breach notification scenario, and suggested mitigations such as implementing a BitLocker PIN and a BIOS password lock. Nightmare-Eclipse has also hinted that YellowKey could function as a backdoor allegedly introduced by Microsoft, although this claim remains unsubstantiated. GreenPlasma is a privilege escalation flaw for which partial exploit code has been released, but it currently triggers a User Account Control (UAC) consent prompt, requiring attackers to invest time in weaponizing it. There is no known mitigation for GreenPlasma, making it crucial for organizations to patch their systems promptly once Microsoft addresses the issue. Nightmare-Eclipse has previously disclosed five zero-day vulnerabilities this year, including BlueHammer, and has characterized their actions as a response to a perceived violation of trust. The researcher has indicated the existence of a "dead man's switch," suggesting that more disclosures could follow if their demands are not met.

Winsage

May 11, 2026

New GhostLock tool abuses Windows API to block file access

A security researcher has developed a proof-of-concept tool called GhostLock, which exploits a vulnerability in the Windows file API, specifically the 'CreateFileW' function. By manipulating the 'dwShareMode' parameter to grant exclusive access to files, GhostLock can prevent other users or applications from opening those files, resulting in a 'STATUSSHARINGVIOLATION' error. The tool automates the process of opening multiple files on SMB shares, causing access disruptions without requiring elevated privileges. This technique is intended as a disruption attack rather than a destructive one, similar to ransomware, and can serve as a diversion during intrusions. Detection of this attack relies on monitoring the open-file count with ShareAccess set to 0 at the file server layer. Dvash has provided resources for IT teams to enhance detection capabilities against this threat.

AppWizard

April 21, 2026

NGate Android malware uses HandyPay NFC app to steal card data

A new variant of the NGate malware targets Android users by disguising itself within a trojanized version of the HandyPay app, which is a legitimate mobile payment processing application. This malware, documented since mid-2024, siphons payment card information through the mobile device's near-field communication (NFC) chip and sends the stolen data directly to attackers, who create virtual cards for unauthorized purchases or cash withdrawals from NFC-enabled ATMs. The new variant has been injected with malicious code into the HandyPay app, which has been available on Google Play since 2021. The code includes emojis, indicating the possible use of a generative AI tool in its development. The shift from previous iterations, which used an open-source tool named NFCGate, to HandyPay is likely motivated by financial considerations and the need for evasion, as HandyPay is more affordable and requires fewer permissions. This NGate variant has been active since November 2025, primarily targeting Android devices in Brazil. It employs two main distribution methods: a counterfeit app named “Proteção Cartão” hosted on a fraudulent Google Play page and a fake lottery website that redirects users to WhatsApp to download the malicious APK. Upon installation, the app prompts users to set it as their default NFC payment application, requests their card PIN, and instructs them to tap their card on the phone for reading, transmitting all collected information to an attacker's email address. To protect against such threats, Android users are advised to avoid downloading APKs from outside Google Play, disable NFC when not in use, and use Play Protect to scan for threats.

Winsage

April 9, 2026

This fake Windows support website delivers password-stealing malware

A phishing campaign has been identified that uses a counterfeit Microsoft support website, microsoft-update[.]support, to trick users into downloading a malicious Windows update disguised as WindowsUpdate 1.0.0.msi. This file, created on April 4, 2026, appears legitimate but contains malware designed to steal sensitive information. The campaign targets French-speaking users, leveraging recent data breaches in France to create convincing scams. The malware, once executed, installs an Electron application that runs a Python interpreter, which then deploys various data theft tools. It employs two persistence mechanisms: modifying the Windows registry and creating a shortcut in the Startup folder. The malware connects to external sites for reconnaissance and data exfiltration, using domains like datawebsync-lvmv.onrender[.]com and store8.gofile[.]io. The malware's components have evaded detection by antivirus tools, with VirusTotal reporting zero detections for the main executable and its launcher. Users are advised to check their registry, remove suspicious files, change passwords, and run a full system scan if they suspect installation of the malicious update. Safe updating practices include using the built-in Windows update feature and being cautious of phishing attempts. Indicators of compromise include specific file hashes, domains associated with the phishing campaign, and file system artifacts related to the malware's installation.

AppWizard

April 1, 2026

‘NoVoice’ Android malware on Google Play infected 2.3 million devices

A new Android malware called NoVoice has been found in over 50 applications on Google Play, with more than 2.3 million downloads. The malware targets older Android versions, specifically those patched between 2016 and 2021, and attempts to gain root access by exploiting vulnerabilities. It conceals malicious components within the com.facebook.utils package and uses steganography to hide an encrypted payload within a PNG image file. NoVoice avoids infecting devices in certain regions and has checks to detect emulators and VPNs. Once activated, the malware contacts its command-and-control server to gather device information and polls it every 60 seconds for tailored exploits aimed at rooting the device. It can exploit 22 vulnerabilities, including kernel bugs, and establishes persistence by replacing key system libraries and installing recovery scripts. The malware injects code into applications, particularly targeting WhatsApp to extract sensitive data for session replication, which is then exfiltrated to the C2 server. The malicious apps containing NoVoice have been removed from Google Play, but users who installed them should consider their devices compromised. Upgrading to devices with later security patches is recommended to mitigate the threat.

AppWizard

March 20, 2026

Google eases Android app sideloading rules after

Google is implementing a policy change to allow easier installation of Android applications from sources outside its Play Store, following an antitrust settlement. This includes an "advanced flow" option that lets users bypass mandatory app verification safeguards through a structured process. The changes aim to balance user choice with protections against scams and malware risks. Previously, Google required all Android applications to be registered by verified developers to mitigate risks like malware and fraud. The new process requires users to enable developer mode, restart their devices, and undergo a waiting period of up to 24 hours before verifying their identity with biometrics or a PIN to install apps from unverified developers. Users can install these apps temporarily for up to seven days or indefinitely, with ongoing warning prompts. Additionally, Google is offering free, limited app distribution accounts for students and hobbyists to share apps without full developer verification.

AppWizard

March 19, 2026

New Perseus Android Banking Malware Monitors Notes Apps to Extract Sensitive Data

Cybersecurity researchers have identified a new family of Android malware called Perseus, designed for device takeovers and financial fraud. It utilizes Accessibility-based remote sessions for real-time monitoring and interaction with infected devices, particularly targeting Turkey and Italy. Perseus monitors user notes to extract personal or financial information and is distributed through dropper applications via phishing websites. It expands on the codebase of previous malware like Phoenix and employs disguises as IPTV services to reduce user suspicion. Once operational, it performs overlay attacks and captures keystrokes to steal credentials from financial applications. The malware allows operators to issue commands through a command-and-control panel, enabling various malicious actions, including capturing note content and initiating remote visual streams. Perseus also conducts environment checks to evade detection and ensure it operates on legitimate devices.