trojan Archives

Tech Optimizer

July 18, 2026

North Korea Buried Four-Stage Malware in Flag Images: Zero Antivirus Detections

North Korea's Contagious Interview hackers have been using a deceptive strategy to target developers by posing as recruiters and embedding malware in SVG files. Elastic Security Labs discovered that the attackers hid malicious payloads within HTML comment blocks of these files, allowing the malware to evade antivirus detection. At the time of the findings, no antivirus engines flagged the compromised repositories, which included trojanized GitHub repositories disguised as coding challenges. The malware executed automatically at server startup and deployed four modules: a browser credential and cryptocurrency wallet stealer, a file stealer, a remote access Trojan, and a clipboard monitor. The campaign, tracked as REF9403, is part of the ongoing Contagious Interview operation attributed to North Korea's Lazarus Group, which aims to generate revenue through cryptocurrency theft. Developers are advised to audit any projects run from unsolicited sources and to monitor specific domains associated with the attack.

Tech Optimizer

July 10, 2026

I tested Norton Antivirus on my PC – and it found a hidden Trojan in 15 minutes

Norton Antivirus is a well-regarded malware protection tool, consistently ranking among the top in the industry with a robust suite of security features. It has a user-friendly interface similar to Malwarebytes, but intrusive upselling tactics detract from usability. Norton offers comprehensive scanning tools, including Quick Scan, Full Scan, Smart Scan, Targeted Scan, and Startup Scan, which successfully detected a Trojan missed by other antivirus software. Its Scam Protection tools provide alerts for online scams and phishing attempts, and it includes unique features like Deepfake Protection and an AI assistant named Genie. According to MRG Effitas, Norton blocked 98% of malware samples with a 0.33% miss rate, achieving a Level 2 certification. Pricing includes several plans, with Norton 360 Deluxe offering the best value at an introductory price of .99 for the first year, rising to .99 annually. Despite its strengths, the intrusive upselling makes it less recommendable compared to Malwarebytes, although it has unique capabilities in threat detection and a comprehensive suite of security tools.

Tech Optimizer

July 10, 2026

Hackers Use Fake VLC Executable and Malicious libvlc.dll to Deploy ValleyRAT

Cybercriminals are exploiting the VLC media player to install ValleyRAT, a remote access trojan, by embedding malware in a seemingly harmless file linked in phishing emails. The attack starts with an email that prompts the victim to download a ZIP archive containing a fake VLC executable and a malicious DLL named libvlc.dll. This method uses DLL sideloading to execute the malware under the guise of a legitimate application. Once executed, the malware establishes persistence by creating a registry entry and connects to a remote server to retrieve the final payload. ValleyRAT employs evasion tactics to avoid detection, including assessing system characteristics before executing harmful actions and using a fileless approach to deliver the payload directly into memory. Researchers have identified indicators of compromise, including specific SHA1 hashes and URLs associated with the malicious campaign.

Winsage

July 8, 2026

Trojanized LetsVPN installer gives attackers remote access to Windows PCs

A malware campaign has been discovered that exploits the VPN service LetsVPN. Researchers from ThreatLocker found a malicious Windows installer that pretends to be the legitimate LetsVPN application while deploying a remote access trojan (RAT) called GoodPersonRAT. The malware allows attackers to control infected systems using stealth techniques. The malicious installer first deploys the RAT and then installs the authentic LetsVPN application, creating an illusion of legitimacy. The package identified as Kuailian_win-setup.86.msi contains the legitimate LetsVPN installer, a loader, and an encrypted payload. GoodPersonRAT features include remote desktop control, file upload/download, command execution, proxying, keylogging, and clipboard monitoring. It specifically targets Telegram Desktop users by archiving critical account information and altering proxy settings. The malware ensures persistence through Windows services and scheduled tasks and can undermine security software. The LetsVPN installer is legitimate and signed, but the MSI package is unsigned and contains malicious components. Users are advised to download software only from official sources and verify digital signatures.

AppWizard

July 5, 2026

Android users warned about fake app stealing bank details

A malicious application posing as a document reader has been downloaded over 100,000 times and installs the Anatsa banking trojan on Android devices. This app has bypassed Google's security checks and remains available on the Play Store. The Anatsa Trojan is designed to steal sensitive financial information by monitoring users' banking apps and intercepting login processes through a fake overlay that mimics legitimate interfaces. It requests extensive permissions, allowing it to observe screens, capture keystrokes, and interact with the device. Users are advised to review installed applications and monitor bank statements for unauthorized activity.

Tech Optimizer

July 3, 2026

Hackers Use Fake VLC Executable and Malicious libvlc.dll to Deploy ValleyRAT

Cybercriminals are using a sophisticated method to bypass security measures by embedding malware within the VLC media player. This campaign exploits VLC to install ValleyRAT, a remote access trojan, through phishing emails that contain links to download a seemingly harmless file. Once the file is opened, it activates a hidden backdoor that evades detection by antivirus solutions. The malware has been active since 2023, with a significant increase in activity noted through 2025 and into 2026, particularly targeting Chinese and Japanese-speaking users. The infection process begins when a victim clicks a link in a phishing email, leading to a ZIP archive containing a disguised executable and a malicious DLL (libvlc.dll). The executable mimics a legitimate VLC file, and when executed, it loads the DLL, allowing the malware to run under the guise of VLC. The malware establishes persistence by creating a registry entry and connects to a remote server to retrieve the final payload. ValleyRAT employs evasion tactics to avoid detection, such as performing checks on system behavior and using a fileless approach to inject its payload directly into memory, avoiding storage on disk. Researchers recommend training employees to recognize suspicious filenames and deploying endpoint detection tools to identify DLL sideloading behavior. For organizations affected by this campaign, isolating compromised systems and reviewing security logs are critical initial steps. Indicators of compromise include a malicious email domain, a ZIP archive containing a fake VLC executable, and a download URL for ValleyRAT.

Winsage

June 27, 2026

New Millenium RAT version infects 62,000 Windows systems worldwide

A significant evolution of the Millenium remote access trojan (RAT) has impacted over 62,000 Windows devices across more than 160 countries. The latest version, 4.*, marks a departure from previous .NET-based versions and is attributed to a threat cluster known as Y2K Operators, with the creator identified as “ShinyEnigma.” There are 62,289 infected endpoints, with 39,730 infections occurring in the first quarter of 2026. The RAT is marketed as malware-as-a-service (MaaS) and promoted through underground forums and platforms like GitHub, with accessible pricing. Millenium RAT 4 is developed in native C++ and uses the Telegram Bot API for command-and-control communications. Its capabilities include stealing browser data, collecting system information, logging keystrokes, capturing screenshots and audio, accessing Telegram and Discord data, downloading additional payloads, and executing Windows or PowerShell commands. The malware ensures persistence by replicating itself in the %APPDATA% directory and creating an autorun registry entry. The malware is distributed through social engineering tactics such as cracked software, cryptocurrency utilities, hacking toolkits, OSINT tools, exploit builders, and Roblox-related cheats. Some campaigns have trojanized malware builders, infecting cybercriminals. One campaign used PDF-themed lures with a malicious Windows shortcut to download the RAT while displaying a legitimate document. Payloads often use filenames associated with Windows components or security software to blend into infected systems. Group-IB recommends avoiding untrusted executables, applying security updates, enabling multi-factor authentication, and monitoring for unusual autorun registry entries.

AppWizard

June 26, 2026

I’ve played countless Doom engine games, so believe me when I say this one that combines the FPS with JRPG combat might be the coolest one in 30 years

End of Starchild is a free standalone game developed by Em Essex, notable for its unique levels and aesthetic diversity. It features beautifully animated title cards, impactful weaponry, and an exploration-focused gameplay experience with hidden secrets and a challenging super-boss. The game takes approximately 15 hours to complete and is recommended for both Doom fans and newcomers, with adjustable difficulty settings available. Some virus scanners may mistakenly flag the game as containing a trojan, but this has been identified as a false positive.

Winsage

June 25, 2026

Introduction to COM usage by Windows threats

Component Object Model (COM) is a technology in Windows that enables object activation, inter-process communication, and automation across different programming languages. Malware exploits COM interfaces for activities such as lateral movement, execution, downloading, exfiltration, persistence, evasion, system discovery, and automation of Windows and Office functionalities. Reverse engineering COM-heavy binaries involves navigating GUIDs and indirect vtable calls to understand malware mechanics. Research at the AVAR 2025 conference and CARO 2026 workshop discusses methodologies for analyzing COM binaries and case studies of malware families that utilize COM. COM is an application binary interface (ABI) model that allows software components to be reused and enables interaction between different programming languages through interfaces defined at the binary level. Distributed COM (DCOM) allows clients to activate COM objects on remote systems. COM classes are identified by unique class identifiers (CLSIDs), and interfaces by interface identifiers (IIDs). The Windows registry stores COM registration data, with classes and interfaces located under specific keys. Malware often acts as a COM client, utilizing the COM runtime to instantiate classes and request interfaces. ProgIDs provide human-readable registry entries for COM classes. The CoCreateInstance function helps create class objects by resolving CLSID registrations. All COM interfaces derive from IUnknown, which manages object lifetimes and interface querying. COM has its own security model, and identifying classes and interfaces used by malware is crucial for threat researchers. Tools like ComView and OleView.NET assist in inspecting COM registrations. The analysis workflow includes identifying activation API calls, extracting CLSID and IID values, consulting registry definitions, and mapping vtable calls. Qakbot, a banking trojan, exemplifies the use of COM in malware, with its architecture enabling malicious activities like credential theft. Dynamic analysis tools can log COM-related calls in real-time to trace execution flow. Notable malware families that utilize COM include Gh0stRAT, which uses Task Scheduler COM interfaces, and the Attor platform, which employs BITS for file transfers. WarmCookie demonstrates the use of COM for persistence through Task Scheduler. Understanding COM's role in malware is essential for cybersecurity professionals.

Winsage

June 24, 2026

Windows RAT Uses Encrypted HTTP C2 and Registry Persistence After npm Infection

A malware campaign targets Windows systems through a malicious npm package named postcss-minify-selector-parser, which mimics the legitimate postcss-selector-parser. This counterfeit package installs a Remote Access Trojan (RAT) on developer machines, beginning with a multi-stage attack triggered by the installation of the package. The RAT can steal credentials, execute shell commands, and communicate with a remote attacker. Security researchers at JFrog identified this threat and reported it on June 22, 2026, noting that two additional related packages, postcss-minify-selector and aes-decode-runner-pro, are linked to the same publisher and remain live on the npm registry. The RAT employs encrypted HTTP communication with a command-and-control (C2) server and ensures persistence by creating a registry key under the Windows Run key. It has capabilities for remote shell execution, file uploads and downloads, and can steal saved login data from Google Chrome using Windows decryption APIs. The malware is designed for organized batch exfiltration of stolen data. Indicators of compromise include specific IP addresses, domains, file paths, and SHA-256 hashes associated with the malware components. JFrog advises users to remove the malicious packages, inspect their dependency trees, and treat any stored credentials as compromised.