exploits Archives

Winsage

June 30, 2026

A critical Windows 11 and Windows 10 flaw turns Microsoft Defender into a hacker’s best friend

Chaotic Eclipse, also known as Nightmare-Eclipse, bypassed Windows 11's BitLocker security using a USB stick and claimed Microsoft left a backdoor in the system. Following this, Microsoft patched three zero-day exploits named YellowKey, GreenPlasma, and MiniPlasma. Nightmare-Eclipse then revealed another zero-day vulnerability called RoguePlanet, which affects Microsoft Defender on Windows 10 and 11, potentially allowing attackers full control over compromised systems. Microsoft is tracking this vulnerability as CVE-2026-50656 and is working on a security update. Nightmare-Eclipse provided a proof-of-concept exploit and described it as a race condition with variable success rates. Microsoft has promoted Windows Defender as adequate for most users but acknowledged that third-party tools can offer additional protection. The company initially threatened legal action against Nightmare-Eclipse but later decided not to pursue lawsuits against researchers sharing their findings.

Winsage

June 30, 2026

A critical exploit bypasses Microsoft Defender in Windows 11 and Windows 10 — so much for “everyday risk protection without additional software”

Security researcher Chaotic Eclipse, known as Nightmare-Eclipse, bypassed Windows 11's BitLocker security using a USB stick and claimed Microsoft intentionally included a backdoor in the feature. Microsoft responded by patching three zero-day exploits disclosed by Nightmare-Eclipse: YellowKey, GreenPlasma, and MiniPlasma, and is monitoring another exploit called RoguePlanet, cataloged as CVE-2026-50656. The RoguePlanet exploit is a race condition with varying success rates on different machines, achieving a 100% success rate on some devices. Microsoft acknowledged that while Windows 11's Defender is generally sufficient for most users, third-party tools can offer additional security features. Tensions between Nightmare-Eclipse and Microsoft have risen, with the company previously considering legal action but now indicating it will not pursue lawsuits against researchers sharing their findings.

Winsage

June 30, 2026

Windows Defender ‘BlueHammer’ vulnerability now exploited as part of malware campaigns — CISA issues warning despite patch release on April 14

A race condition vulnerability in Windows Defender, known as BlueHammer, has been exploited by the hacker Nightmare Eclipse, allowing attackers to gain SYSTEM user access. Microsoft released a patch for this vulnerability on April 14, but the Cybersecurity and Infrastructure Security Agency (CISA) has flagged it as actively exploited in ransomware campaigns. The average time to apply critical OS patches across Windows 10 and 11 is now 127 days, with enterprise environments averaging 76 days. Estimates suggest that 15% to 26% of Windows 10 machines remain unpatched, with a conservative estimate of 20% translating to one in five machines being vulnerable. Microsoft has extended security updates for Windows 10 until October 14, 2027, but public awareness of the updates remains low.

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.

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.

AppWizard

June 20, 2026

Path of Exile 2 director says players exploiting system to become in-game millionaires ‘ruined Christmas for me’ and joked that he’s ‘lost all sympathy’ for everyone who took advantage of it

The player trading economy of Path of Exile 2 experienced turmoil due to a new loot-gathering technique that allowed players to quickly accumulate in-game wealth. This led Grinding Gear Games to interrupt their holiday break to address the issue. The introduction of the "temple" feature enabled players to construct dungeons and exploit the system for excessive rewards by locking characters in the campaign and resetting levels. Mark Roberts, co-director of PoE 2, expressed frustration over the need for emergency patches and highlighted ongoing player exploits related to the temple. A patch was released to mitigate a temple strategy that threatened the game's economy. Roberts indicated a lack of sympathy for the temple due to the critical nature of the exploits. Players often aim to accumulate wealth for upgrading builds, but solo self-found mode limits access to rare items. The incident raises questions about future league launches during the holiday season.

Winsage

June 19, 2026

Microsoft finally admits its default Windows 11 25H2, 24H2 action broke key legacy component

Microsoft released Patch Tuesday updates for Windows 11, specifically KB5094126 and KB5093998, along with dynamic updates KB5094149, KB5095971, and KB5094156. Two issues have been acknowledged: malfunctioning Office applications and complications with the Recycle Bin. In July 2025, Microsoft changed the default settings of Windows 11 to JScript9Legacy in versions 24H2 and later, continuing with version 25H2 in October 2025. This change aimed to enhance security by addressing vulnerabilities related to legacy scripting, particularly cross-site scripting (XSS). A support article details a compatibility issue arising from the transition from jscript9.dll to jscript9legacy.dll, which affects how JScript manages execution context. Functions and definitions established by one script are no longer accessible to subsequent scripts, leading to failures in legacy applications. To address this, Microsoft released the KB5077241 update, which requires manual activation of persistent JScript execution context through a Registry setting. The steps to implement this solution involve creating a feature control registry key and configuring a DWORD value for specific processes or all processes.

AppWizard

June 19, 2026

Rokarolla trojan uses screen overlays to hijack Android financial apps

A new banking trojan for Android, named Rokarolla, targets 217 applications, including banking and cryptocurrency platforms, to steal credentials and sensitive financial data. It operates via a command and control (C2) server and bypasses the Google Play Store by using phishing websites that mimic legitimate download portals. Users are tricked into downloading a dropper that installs the malware, which disguises itself as the Google Play Protect security tool to gain access to Android Accessibility Services. Rokarolla employs dynamic screen overlays to capture user input in targeted financial applications and can also impersonate the device's lock screen. Additionally, it uses a pseudo-VNC system to intermittently capture screenshots for data extraction and can modify clipboard contents to manipulate cryptocurrency transactions by replacing copied addresses with those controlled by attackers.

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.

Winsage

June 17, 2026

Windows SprySOCKS Malware: Advanced Kernel-Level Rootkit Targets Government Organizations via Supply Chain Vulnerabilities

The Windows variant of SprySOCKS malware, developed by the Chinese threat group Earth Lusca, targets government entities globally and features advanced capabilities such as rootkit-level stealth and extensive command-and-control (C2) functionalities. It operates on Windows systems, utilizing two main variants: WINDRV, which includes kernel drivers for stealth operations, and WINPLUS, a streamlined backdoor. The malware can communicate over TCP, UDP, and WebSocket, offering over 30 C2 commands for various operations, including system information gathering and keystroke logging. WINDRV loads a driver named ‘RawWNPF’ into memory using another signed kernel driver, allowing it to conceal processes and achieve persistence. The malware's design incorporates open-source elements and exploits vulnerabilities in the software supply chain, notably using a leaked certificate for driver signing. To combat SprySOCKS, organizations are advised to implement advanced endpoint detection and response (EDR) solutions, maintain regular patching, and manage supply chain risks vigilantly. The malware's adaptability and reliance on legitimate certificates complicate detection efforts, necessitating continuous refinement of security practices.