persistence Archives

Winsage

August 24, 2026

Windows Defender’s own driver can leave systems defenseless

The configuration reveals a sequence of actions including file and directory deletions, relocations, and registry operations, such as deleting and modifying registry keys and values. The file-move primitive can transform into an arbitrary file-write capability when directed to the System32 directory. The automation of these actions is achieved through a tool called BTRCLI, which extracts a legitimate driver from Windows Defender, constructs an encrypted transaction, and loads the driver, using the target machine's version of BTR.sys to avoid external drivers.

Winsage

August 24, 2026

Microsoft Makes Rare Move to Optimize 8GB Memory as Windows Bloat Becomes Biggest Bottleneck for AI PCs

Microsoft is re-optimizing Windows memory performance for devices with 8GB or more RAM, moving away from its previous approach that treated 8GB as entry-level. The company is recognizing that hardware growth can no longer mask systemic inefficiencies, particularly with the rise of AI requiring substantial resources. Windows has accumulated background services and frameworks without a cohesive resource management strategy, leading to inefficiencies. Compatibility with legacy systems has complicated resource management, while commercial pressures have contributed to system bloat. The reliance on web technologies, particularly WebView2, has further increased memory consumption. Microsoft aims for Windows to achieve integration similar to macOS but faces challenges due to its diverse ecosystem. The demand for memory driven by AI has made system-level optimization a pressing issue, prompting Microsoft to adjust its guidance on memory requirements. The company must balance modernization with maintaining compatibility with older applications and drivers as it adapts to new computing demands.

AppWizard

August 23, 2026

Manic Android Malware Exfiltrates Data From Offline Phones via Nearby Infected Devices

A new Android malware threat, codenamed Manic, poses significant risks to Ukrainian banks, government services, and messaging applications, with a reach extending to Russian and European financial institutions, global fintech platforms, cryptocurrency services, and military communication channels. Manic combines Android banking malware and mobile spyware, targeting sensitive applications and enabling comprehensive device takeover. It features a novel Wi-Fi mesh technique for data relay through compromised devices and utilizes phishing sites and dropper apps. The malware originated in February 2026, with initial development leading to its first deployment by late May. It monitors 169 package IDs related to banks, payment services, and messaging applications, primarily affecting Ukrainian targets but also impacting applications in Russia and Europe. Manic can infiltrate commercial and military messaging apps, track locations, monitor notifications, and collect files. It exploits Android's accessibility services to capture sensitive data and employs a store-and-forward relay mechanism for data exfiltration through nearby compromised devices. Google has stated that no apps containing this malware are found on Google Play, and Android users are protected by Google Play Protect.

Tech Optimizer

August 22, 2026

Best Ransomware Protection 2026: Tested and Ranked

Ransomware protection is best approached as a layered strategy rather than relying on a single solution. The effectiveness of software is significantly enhanced by maintaining a well-managed backup that is disconnected during an attack. Five tools were evaluated based on their default settings, focusing on behavioral detection, protected folders, file rollback, and real-time protection. 1. Norton 360: Rated as the best overall ransomware protection, it offers comprehensive features including behavioral monitoring, protected folders with dual alert modes, and 50 GB of cloud backup within a single subscription. It has a perfect score in advanced threat assessments. 2. Bitdefender: Recognized for its file rollback and remediation capabilities, it provides an effective "undo" feature that restores files, although this feature is turned off by default. 3. Avast One Free: The best free ransomware protection option, it includes a dedicated shield on the free Windows tier and has achieved a perfect score in advanced threat assessments. 4. NordVPN Threat Protection Pro: Best for blocking the delivery route of ransomware, it prevents downloads before encryption starts but cannot stop the process once it has begun. 5. McAfee: Best for protecting multiple devices simultaneously, it offers unlimited device coverage on most plans with integrated ransomware defense in its scanning engine. Modern ransomware protection software has shifted from signature matching to focusing on monitoring the behavior of processes interacting with files. The four essential layers of protection include behavioral monitoring, protected folders, automatic file rollback, and backup. Most users do not need a separate anti-ransomware product, as these features are typically included in main antivirus suites, with the key consideration being whether these features are activated. The rankings of the tools were based on whether the ransomware protection layer is enabled by default, the extent of file recovery when intervention occurs, and the frequency of false positives during normal use. - Norton 360: Best overall, with protection enabled by default and a perfect score in advanced threat testing. - Bitdefender: Best for file rollback, but the rollback feature is disabled by default. - Avast One Free: Best free option, with a perfect score in advanced threat assessments but lacks rollback capabilities. - NordVPN Threat Protection Pro: Effective at blocking malware downloads but does not provide rollback or backup features. - McAfee: Suitable for families with multiple devices, offering automatic backup of flagged files but lacks user-configurable protected folder options. The effectiveness of ransomware protection tools is primarily assessed through behavioral responses rather than library matching. Backup remains a critical layer of defense, functioning even when other layers fail.

Winsage

August 18, 2026

CISA confirms 2025 Windows Task Host flaw exploited by ransomware groups

The Cybersecurity and Infrastructure Security Agency (CISA) confirmed a privilege escalation vulnerability in the Windows Task Host, designated as CVE-2025-60710, which is being exploited by ransomware groups. Microsoft released a patch for this flaw on November 11, 2025, and CISA added it to its Known Exploited Vulnerabilities catalog on April 13. The vulnerability allows scheduled tasks to operate at the highest privilege level, enabling attackers to delete files and potentially gain full control over a machine. This access can lead to the extraction of credentials, manipulation of endpoint protection, and lateral movement across networks, culminating in widespread ransomware deployment. Security experts emphasize the critical nature of this vulnerability and urge organizations to address it promptly, as it poses significant risks to systems running Windows 11 and Server 2025.

Winsage

August 15, 2026

After years of requests, Windows 11 is dangerously close to bringing back full taskbar freedom — top, left, right, or bottom

Windows 11 users can now relocate the taskbar to the top or sides of the screen with the latest Insider Preview builds. This feature will be included in the September Patch Tuesday update, but is available immediately to those in the Release Preview Channel. The update also allows for a smaller taskbar option, enhancing screen space for smaller devices. Key features in Build 26100.9267/26200.9267 include: - Taskbar customization with new positioning options and a smaller taskbar option. - Enhanced Start menu with size options, renaming of the Recommended section to Recent, and a redesigned settings page. - Improvements to Windows Search, including a simplified interface and automatic indexing of frequently used folders. - Updates to File Explorer for faster launch times and touch scrolling support. - General design updates with modernized progress indicators. - New Windows Share feature for discovering apps from the share window. - Enhanced security with just-in-time privileges for administrative tasks. - Improved responsiveness when switching between virtual desktops. - Updates for display settings and brightness reliability. - Reliability improvements for Task Manager and Windows Update behavior. - Network improvements for VPN-related issues. - Enhanced typing reliability with the Japanese IME. - Introduction of the ML-KEM algorithm for TLS key exchange. - Removal of the Windows Management Instrumentation Command-line utility in future versions.

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

August 14, 2026

APT group HoneyMyte upgrades CoolClient: the backdoor gets a kernel-level Windows rootkit

CoolClient is a sophisticated backdoor family linked to the HoneyMyte APT group, actively used in cyber-espionage campaigns targeting organizations in Asia and Russia since its initial disclosure in 2022. It has capabilities such as keylogging, clipboard theft, credential harvesting, and system reconnaissance. Investigations in 2023 revealed enhancements, including clipboard theft and HTTP traffic interception. By late 2025 and into 2026, a variant was noted that could deploy a signed kernel-mode driver as a Windows service, improving its stealth and operational capabilities. In a recent campaign targeting Myanmar, the HoneyMyte group used PlugX to deploy CoolClient components. They configured Microsoft Defender to exclude a fake Windows Defender installation directory and a renamed executable, defender.exe, to avoid detection. Persistence was achieved through a scheduled task that executed defender.exe with SYSTEM privileges at startup, which sideloaded the malicious libngs.dll to initiate the CoolClient execution chain. The latest CoolClient variant has a multi-stage execution chain, including: - defender.exe / Sang.exe: Exploited legitimate application for DLL sideloading. - libsrapc.dll: Benign dependency for the Sangfor application. - libngs.dll: First-stage loader that decrypts and loads the next stage. - loadcert.ini: Second-stage DLL implementing core functionalities. - cert.ini: Final-stage implant for command and control communication. - time.ini: Configuration file for CoolClient. The execution begins with the legitimate Sangfor application loading libngs.dll, which uses obfuscation to conceal its operations. The second stage, loadcert.ini, is injected into synchost.exe and performs tasks including persistence and process injection. The kernel-mode driver deployment routine involves decrypting time.ini, verifying privileges, and creating a service to execute the driver, enhancing stealth. The deployed kernel-mode driver, msagent.sys, is digitally signed and helps hide processes, files, and registry objects, making detection more difficult. The latest variant continues to target organizations consistent with previous HoneyMyte activities, with confirmed victims in Myanmar, Mongolia, Pakistan, and Russia, including government entities. The deployment of CoolClient as a secondary backdoor after a PlugX infection indicates a strategic approach to maintain access to compromised systems. The malware is confirmed as a new variant of CoolClient associated with the HoneyMyte threat group, with the kernel-mode driver marking a significant advancement in its capabilities.

Winsage

August 11, 2026

5 years later, Windows 10 refuses to die, and Microsoft just can’t push holdouts to Windows 11

Windows 11 was released in 2021, but Windows 10 remains a significant presence, with approximately 17% market share among enterprise PCs as of 2026. Lansweeper reports that Windows 10 has lost users, dropping from nearly 50% in early 2025 to around 40% by October 2025, and settling at 16.9% a year later. Key sectors using Windows 10 include healthcare (23%), consumer retail (22.7%), small and medium businesses (21.4%), manufacturing (18%), and enterprises (16.6%). Windows 10 has 1,903 active CVEs compared to 652 on Windows 11, indicating a 2.9 times higher vulnerability. About 14% of Windows 10 users receive Extended Security Updates, leaving 2% on unsupported versions. HP reports that 30% of its installed base still uses Windows 10, reflecting a core group resistant to upgrading. Microsoft states that Windows is active on 1.6 billion PCs globally, with a noted 7% decrease in Windows OEM revenue attributed to lower PC demand and the end-of-support effects for Windows 10.

Tech Optimizer

July 28, 2026

ClamAV Setup: Linux Antivirus in 12 Steps [2026]

Malware can threaten Linux systems, which are often mistakenly believed to be immune to viruses. It can be introduced through email attachments, infected files, or compromised plugins, especially when Linux servers interact with Windows clients or handle internet uploads. ClamAV is an open-source antivirus engine maintained by Cisco Talos, designed for scanning mail traffic and file uploads. As of mid-2026, the stable release is ClamAV 1.5.x, with version 1.5.2 being the latest patch. To deploy ClamAV, users need root or sudo access on a compatible Linux machine, at least 2 vCPUs and 2GB of RAM, 5GB of free disk space, and outbound HTTPS access to ClamAV’s signature mirrors. The installation process involves several steps, including configuring freshclam for automatic updates, validating detection with the EICAR test file, and setting up cron jobs for regular scans. ClamAV can also be integrated with mail servers and a SIEM for enhanced security. Common pitfalls in deployment include skipping the initial freshclam run and using clamscan instead of clamdscan for repeated scans. ClamAV is free for commercial use and can also scan Windows systems, although it does not replace comprehensive endpoint protection solutions.