DLLs Archives

Winsage

October 4, 2026

Nadella has lost the plot calling Copilot an OS again, it’s a web app on Windows 11

Satya Nadella has referred to Copilot as a “new OS for work” during a leadership update, following Microsoft's introduction of the latest iteration of Copilot. The new Copilot app, which replaces the previously named Microsoft 365 Copilot, is currently available for users, although some features like Home, Code, and Autopilot are still forthcoming. The app operates as a standard Windows application, specifically a rebranded Microsoft Edge launcher built on a Chromium framework. Nadella reiterated his vision for Copilot in a post dated October 1, emphasizing its role in consolidating various work functions into a single platform. The Copilot app integrates features such as Home, Office applications, and a proactive command center named Today. Currently, the app primarily functions as a chat interface, with significant features yet to be rolled out. The architecture of Copilot relies on a lightweight launcher and a complete Edge build, resulting in high RAM consumption. Microsoft has shifted Copilot’s architecture from a native WinUI version to a web-based wrapper, supported by a secondary component for additional functionalities. Internal documents reveal a vision for a prototype called CopilotOS, indicating a long-standing ambition to create a cohesive workspace.

Winsage

October 1, 2026

Windows XP had a hidden database of broken apps, and Microsoft used it to trick them into working

Windows XP, released in 2001, was designed with a hidden compatibility database to support legacy software. This database, located in the C:WINDOWSAppPatch folder, contained approximately 200 compatibility fixes at launch and utilized a sophisticated matching system based on file size, checksum, version, and date. Windows XP could modify its behavior for specific applications through the use of shims, which acted as intermediaries to adjust application calls to the Windows API. Notable shims included Win98VersionLie, which faked the Windows version for compatibility, and EmulateHeap, which replicated the Windows 95 memory management style. Microsoft recognized that blocking applications relying on undocumented features could hinder user upgrades, as many organizations depended on legacy software. The compatibility fixes were managed through DLLs in the AppPatch folder, allowing the core operating system files to remain unchanged. Microsoft continued to enhance XP's compatibility with updates even years after its release.

Winsage

September 22, 2026

Microsoft’s most useful Windows toolkit turns 30 this year, and it still doesn’t ship with Windows 11

A fresh installation of Microsoft Windows 11 includes features like Copilot but lacks certain user control tools. The Sysinternals suite, maintained by Microsoft since its acquisition in 2006, consists of over 70 utilities and has received regular updates since its establishment in 1996. Notable updates include a modern interface for DebugView and enhanced support for startup apps in Autoruns. Sysinternals tools, such as Process Explorer and Autoruns, offer advanced functionality compared to standard Windows tools. Microsoft is integrating some Sysinternals utilities into PowerToys, starting with ZoomIt, and Sysmon has been introduced in Windows 11 Insider builds. Users have expressed interest in further integration of Sysinternals tools, particularly Process Explorer.

Winsage

September 2, 2026

Fake Software Installers Disable Windows Update and Weaken Microsoft Defender

An active malware campaign is using counterfeit software-download websites to distribute malicious installers, primarily targeting users seeking popular software. This campaign has significantly affected China-based operations of multinational corporations and Chinese-speaking users. The malware, once executed, can establish persistence, undermine security measures, and communicate with attacker-controlled infrastructure. Victims span various sectors, including healthcare, manufacturing, gaming, technology, logistics, government, and education. Microsoft associates this campaign with a Chinese threat cluster called Silver Fox, known for using spoofed vendor download pages to spread Gh0st RAT and ValleyRAT. The malicious websites are hosted on .com.cn and .hl.cn domains, featuring Chinese-language content. The downloaded files are dynamically generated, and upon execution, they deploy a wrapper installer that initiates the malware payload. The malware achieves persistence through scheduled tasks and interferes with Windows Update services. The campaign establishes command-and-control communication over non-standard ports, with two identified domains linked to the activity. Microsoft Defender has detected the threat and initiated containment procedures. Kaspersky reported a related malicious installer exploiting a legitimate adware application to execute a backdoor, which captures keystrokes and clipboard contents. ValleyRAT, a sophisticated implant, can collect system information, reboot the computer, capture screenshots, and transmit logs. The attackers are motivated by cyber espionage and financial gain, targeting organizations globally. A subgroup within GoldenEyeDog, known as CuboidalCanine, has also been linked to the use of ValleyRAT, particularly in the gambling industry. In June 2026, Chinese authorities addressed cybercrime cases involving a new variant of the Silver Fox trojan.

Winsage

September 2, 2026

Fake Microsoft Edge, Kaspersky and Razer Installers Used to Compromise Windows Systems

An ongoing malware campaign is targeting Windows devices through counterfeit download pages for well-known software brands like Microsoft Edge, Kaspersky, and Razer. The campaign affects various sectors, including healthcare, manufacturing, gaming, technology, logistics, government, and education. It utilizes high-fidelity fraudulent websites that closely mimic legitimate vendors, with observed lure domains such as app-microsoft-edge[.]com[.]cn and kaspersky-lab[.]hl[.]cn. Attackers employ evasion tactics like server-side payload regeneration and create multiple copies of the same archive in quick succession. Victims are lured into downloading ZIP files that contain a bundled wrapper installer, which activates a stage-one executable in randomized directories. The malware often masquerades as legitimate software, with some payloads impersonating known applications. Persistence is achieved through scheduled tasks with unusual names, and the malware employs various evasion techniques, including deleting shadow copies and altering file permissions. Microsoft Defender has identified activity across multiple stages of the attack, including delivery, execution, and command-and-control communications. To mitigate risks, organizations are advised to block downloads from unofficial sources, enforce Tamper Protection, and implement Attack Surface Reduction rules. Indicators of compromise (IOCs) include specific lure domains and URLs associated with the campaign.

Winsage

September 1, 2026

New ClickFix campaign can deploy powerful multi-stage malware directly through Windows Terminal and PowerShell

Security researchers at Microsoft have identified a campaign named "TerminalFix" that exploits compromised websites to trick users into installing a backdoor. Users visiting these sites encounter a deceptive overlay prompting them to complete a fake Cloudflare CAPTCHA, which requires executing a malicious PowerShell command. This leads victims to inadvertently sideload dynamic link libraries (DLLs) and deploy a Python implant that creates encrypted reverse tunnels, allowing attackers to access internal networks.

Winsage

August 14, 2026

Mustang Panda Adds Signed Windows Rootkit to CoolClient Backdoor for Stealth

The threat actor known as HoneyMyte, also referred to as Mustang Panda, has been deploying an upgraded version of the CoolClient backdoor, which includes a signed Windows kernel-mode rootkit. This rootkit enhances the malware's ability to conceal malicious processes, files, registry objects, and command-and-control (C2) network information. Victims have been identified in Myanmar, Mongolia, Pakistan, and Russia, with confirmed targets including government entities. The CoolClient backdoor is deployed as a secondary access layer following an initial PlugX infection. The kernel component activates when CoolClient gains full access to the Service Control Manager (SCM) and the SeTcbPrivilege privilege. If these conditions are not met, the malware bypasses driver deployment and advances to the final-stage implant. Kaspersky has provided indicators of compromise (IoCs), including file hashes, paths, and C2 domains. In a campaign targeting Myanmar, HoneyMyte used PlugX as the initial implant to deploy CoolClient, which involved creating Microsoft Defender exclusions and renaming a legitimate executable for DLL sideloading. Persistence is achieved through a scheduled task that executes the binary with SYSTEM privileges at startup. Execution begins when a legitimate application loads a malicious DLL, which then manages persistence, registry modifications, UAC bypass, process injection, driver deployment, and C2 communications. When privileges are granted, the malware extracts a kernel driver, writes it to disk, and establishes a driver service. The driver is digitally signed with a certificate from Nanjing Ranyi Technology Co., Ltd. The driver receives configuration data from the CoolClient user-mode component and utilizes specific IOCTL requests to register trusted processes and protect filesystem and registry paths. The rootkit can limit access rights to protected processes, hide processes by unlinking them from the active process list, and deny access to protected files and directories. It also filters C2 IPv4 addresses from network information. The driver incorporates 33 IOCTL handlers, but only three were observed in use during standard execution. Kaspersky shared several file hashes related to the malware, including those for the kernel driver and malicious DLLs. This follows earlier disclosures regarding a newer CoolClient variant and a different HoneyMyte kernel-mode rootkit documented in December 2025.

Winsage

July 25, 2026

It’s impossible to recommend paid Windows cleanup utilities when Windows Sysinternals does everything for free

Many utility suites for Windows maintenance require a yearly subscription but often only aggregate basic tools. Users can achieve similar results without costs, as Windows manages routine maintenance effectively. Microsoft's Sysinternals suite offers advanced tools like Autoruns, which provides a comprehensive view of startup entries, and Process Explorer, which offers detailed process monitoring. SDelete securely deletes files beyond recovery, while RAMMap provides insights into memory usage without the risks of third-party applications. Although Sysinternals tools may lack polished interfaces, they deliver substantial functionality for users willing to learn how to use them.

Winsage

July 25, 2026

It’s impossible to recommend paid Windows cleanup utilities when Windows Sysinternals does everything for free

Windows utility suites often charge a yearly subscription fee but frequently provide only basic functionalities like startup managers and process monitors. Many features can be accessed for free through Windows' built-in capabilities. Microsoft's Sysinternals suite offers powerful alternatives, such as Autoruns, which provides a comprehensive view of all startup locations, including registry keys and scheduled tasks. Process Explorer offers detailed insights into running processes, surpassing the standard Task Manager by displaying process trees and resource usage. SDelete securely deletes files by overwriting data multiple times, making recovery nearly impossible. While Sysinternals tools are powerful, they require a learning curve and deeper engagement compared to the polished interfaces of paid utilities. Sysinternals emphasizes functionality over marketing, proving that free tools can deliver exceptional performance without compromising quality.

Winsage

July 12, 2026

Windows 95 didn’t detect installers, it ‘guessed’ based on the file name, says veteran dev — it simply checked for words like setup, install, inst, or localized equivalents

Raymond Chen, a Microsoft engineer, revealed that Windows 95 identified installation programs by analyzing executable filenames against a list of keywords, including "setup," "install," and "inst." The system would then initiate a routine to repair any compromised system files. The list included six terms: setup, install, inst, imposta, ayarla, and felrak. Chen noted redundancy in the list, suggesting "install" was unnecessary since it included "inst." For executables not matching the terms, Windows 95 scanned the executable's path for "Setup." The system maintained backup copies of frequently overwritten files in a hidden directory at C:WindowsSYSBCKUP and would restore correct versions after installers completed. File verification was often postponed until the next system boot, especially for installers that reverted to MS-DOS for file replacements. This file repair mechanism continues to influence modern operating systems, including Windows 11.