Windows malware Archives

Winsage

August 27, 2026

New Windows malware lays dormant until a custom command activates it like a sleeper agent

Researcher Dominik Reichel has identified a new malware implant called SLEEPWALKER, which is disguised as an agent from ESET. SLEEPWALKER is unique because it does not contain malicious code and remains dormant until it receives specific network signals to activate. It appears to be designed for targeted attacks, likely orchestrated by nation-states. Although it was submitted to VirusTotal last year, it has not been linked to any active campaigns or confirmed victims. The origins of SLEEPWALKER are unknown, and its code is described as somewhat "rough around the edges," indicating it may still be in development.

Winsage

August 27, 2026

Windows malware numbers look awful next to macOS. I’m still not worried

Windows holds a 71 percent share of the desktop market, with over 1.6 billion active Windows PCs globally. In contrast, macOS accounts for just over seven percent of the market, rising to nearly 20 percent when combined with OS X. Windows users face a variety of threats, including trojans and riskware, and in 2025, Windows users encountered seven times more malware than macOS users. Surfshark's data indicates that macOS users are increasingly targeted by phishing attacks, which pose significant financial and personal risks.

Winsage

August 22, 2026

Hackers abuse FTP server banners to deliver new Windows malware

Threat actors are exploiting FTP banners to conceal commands for deploying two undocumented remote access trojans (RATs), E4del and PINHOLE. This method was first observed by MalwareHunterTeam in July 2026, using shortcut files (.LNK) and FTP server banners as dead-drop resolvers to retrieve malicious commands. SOCRadar confirmed that this technique has been weaponized since early July 2026 and remains active, with new infrastructure identified as recently as August 2026. The attacks typically start with a ZIP archive leading to an LNK-based infection chain, likely initiated through phishing tactics. E4del is a Node.js-based RAT disguised within a digitally signed Electron application mimicking Discord, capable of executing commands, capturing screenshots, streaming desktops, and downloading additional payloads. It also includes a module for privilege escalation. PINHOLE retrieves its command and control configuration from Pinterest and SurveyMonkey, designed to leave a minimal footprint and employing shellcode fluctuation. It supports 14 commands, including file management and credential theft, but had only recorded 11 execution events at the time of analysis. SOCRadar notes that while using FTP banners is a novel approach, it is less stealthy than traditional web-based dead-drop resolvers. They provide indicators of compromise to help identify malicious infrastructure and infected machines.

Tech Optimizer

June 18, 2026

Retro gaming fans are the new target for fake GitHub malware

Retro gaming enthusiasts should be cautious when exploring GitHub projects for tools or plugins, as cybercriminals may disguise malware as homebrew software. A specific incident involved a project called EQVita, which pretended to be a free audio tool for PlayStation Vita but actually contained Windows malware. The downloaded file included three files: Launch.bat, luajit.exe, and x64.txt, with the latter concealing a hidden script that connected to the attacker's server upon execution. This scam is part of a broader trend where counterfeit GitHub repositories distribute SmartLoader malware, which retrieves additional malicious software aimed at stealing passwords and cryptocurrency wallets. The PS Vita community, despite the console's production ceasing, remains active in modding, making it a target for attackers. Legitimate plugins typically come in Vita-compatible formats, while fake ones may feature polished marketing materials and AI-generated descriptions. Users are advised to verify sources, be cautious of suspicious downloads, and utilize security tools like Malwarebytes. If someone has executed the malicious EQVitav1.3.zip file, they should conduct a malware scan, change important passwords, and monitor accounts for unauthorized access. Indicators of compromise include the domains https://github.com/Voistace/EQVita and https://voistace.github.io, and the IP address 85.137.52.21.

Tech Optimizer

June 9, 2026

Fake ChatGPT download site infects Windows and Mac users with malware

A counterfeit website, openew[.]app, is impersonating OpenAI's official ChatGPT download page and distributing malware. Windows users who download from this site receive a credential-stealing malware loader, while macOS users are infected with Odyssey Stealer, a variant associated with cryptocurrency theft. The fake site mimics the legitimate ChatGPT interface and uses HTTPS to appear trustworthy. The Windows malware, Chat_GPT.exe, creates a back channel to an attacker-controlled server, while the macOS malware captures sensitive data and attempts to replace legitimate cryptocurrency wallet applications with compromised versions. Users who download from official sources remain safe, but those who click on ads or unfamiliar links risk compromising their online accounts and sensitive information. Malwarebytes offers protection against this malware. Indicators of compromise include specific file hashes and network indicators associated with the malicious site.

AppWizard

June 8, 2026

Pirated PC games are delivering password-stealing malware

A surge in Windows malware campaigns has been identified, with malicious software hidden in pirated PC games and modified installers for popular franchises like Far Cry, Need for Speed, FIFA, and Assassin’s Creed. Over 400,000 devices globally have been affected, with around 30,000 cases in the United States. The malware, known as the "RenEngine loader," is disguised as a legitimate game launcher and infects systems when users download cracked games. It aims to deploy an infostealer called ARC, which can capture sensitive information such as passwords and cryptocurrency wallets, and may also install other harmful payloads like the Rhadamanthys stealer and Async Remote Access Trojan (RAT). Users often remain unaware of their infection until significant damage occurs. Recommendations for safety include avoiding unofficial downloads, using up-to-date anti-malware protection, and regularly updating software.

Tech Optimizer

May 5, 2026

Intego ONE

Intego has released Intego ONE, a rebranded antivirus solution for Mac users that combines antivirus capabilities with a firewall. The product has received a 97.1% malware detection score in independent lab tests, although it lacks phishing protection, a feature offered by competitors like Norton and Bitdefender. Intego ONE has a tiered pricing structure, with the Essential tier costing .99 annually and providing antivirus and firewall protection, while the Advanced tier, which includes the SmartClean system cleanup tool, costs .99. The top-tier Complete subscription, which includes a VPN, is priced at .99 annually. Intego offers a 7-day free trial for potential customers. The software installation is straightforward, requiring Full Disk Access for optimal functionality. Intego's firewall is integrated into the main application for easier user interaction. The SmartClean feature aims to optimize system performance but may not justify its additional cost for all users. The VPN included in the Complete tier is user-friendly but may be priced higher than standalone options.

Winsage

April 6, 2026

ResokerRAT Hijacks Telegram API to Command Infected Windows PCs

A newly discovered Windows malware called ResokerRAT uses Telegram’s Bot API for its command-and-control operations, allowing it to monitor and manipulate infected systems without a conventional server. It obscures its communications by integrating with legitimate Telegram traffic, complicating detection. Upon execution, it creates a mutex to ensure only one instance runs and checks for debuggers to avoid analysis. It attempts to relaunch with elevated privileges and logs failures to its operator. ResokerRAT terminates known monitoring tools and installs a global keyboard hook to obstruct defensive key combinations. It operates through text-based commands sent via Telegram, allowing it to check processes, take screenshots, and modify system settings to evade detection. Persistence is achieved by adding itself to startup and altering UAC settings. The malware retrieves additional payloads from specified URLs and uses URL-encoded data for communication. Researchers have confirmed its Telegram traffic, and its behavior aligns with various MITRE ATT&CK techniques. Security teams are advised to monitor for unusual Telegram traffic and scrutinize registry keys related to startup and UAC.

Tech Optimizer

February 16, 2026

Phishing Lures Spread XWorm Remote Access Trojan

A cyber-espionage campaign is utilizing the XWorm Remote Access Trojan (RAT) to infiltrate systems via phishing emails and a Microsoft Office vulnerability (CVE-2018-0802). XWorm, first detected in 2022, allows attackers remote control over infected computers for surveillance and data theft. The campaign uses business-oriented phishing emails with malicious Excel attachments that exploit the vulnerability to execute a fileless attack. The malware connects to a command-and-control server, encrypting communications and transmitting system details. XWorm features a plugin architecture with over 50 modules for various malicious activities, including credential theft and DDoS attacks. Security experts highlight the ongoing risk of legacy software vulnerabilities and recommend patching outdated components.

Tech Optimizer

January 9, 2026

MacPaw Moonlock

Moonlock is a new antivirus solution for Mac developed by MacPaw, utilizing technology from CleanMyMac. It features a basic VPN, security configuration scan, and an elegant user interface, but some functionalities may not perform as expected. The annual subscription for a single Mac is priced higher than competitors like CleanMyMac and G Data Antivirus. Moonlock requires macOS 13 (Ventura) or later for compatibility. Setting up the app involves creating an account and granting permissions, with a full scan recommended post-installation. In independent lab tests, Moonlock scored 5.5 out of 6 in protection and 6 in usability, but its performance rating was 4.5 points, lower than competitors. The Security Advisor feature provides advice on enhancing security, while the System Protection feature identifies areas for improvement. Moonlock includes a basic VPN with 61 server cities in 50 countries. Its Network Inspector focuses on blocking traffic from specified countries, but its effectiveness is questionable. Flexible scan scheduling is available, but it does not guarantee the removal of Windows malware. The app includes informational panels and animated videos, but it currently lacks effective phishing protection, failing to block known fraudulent websites.