security researchers Archives

Tech Optimizer

September 29, 2026

The Evolution of Endpoint Security: Why EDR Represents a Fundamental Shift From Traditional Antivirus

Organizations that rely on technology face evolving cyber threats that traditional antivirus software struggles to address. Traditional antivirus detects known malware through signature matching but is limited in its ability to catch new or modified threats. Modern cyberattacks utilize techniques like polymorphic malware and fileless attacks to evade detection. Endpoint Detection and Response (EDR) tools have emerged as a solution, focusing on analyzing behavior rather than matching known threats. EDR continuously monitors endpoints, collects data on system activities, and uses behavioral analysis to identify suspicious actions. This allows for real-time responses to threats, such as isolating affected devices or rolling back changes made by ransomware. EDR is essential for all organizations, including small businesses, which are often targeted by attackers. It should be part of a broader security strategy that includes traditional antivirus, regular updates, employee training, access controls, and backups. When considering EDR options, businesses should prioritize response speed, visibility, reporting capabilities, and integration with existing IT support.

AppWizard

September 29, 2026

How we found 24 Android vulnerabilities using our open source AI security agent

The GitHub Security Lab has introduced the Taskflow Agent, an open-source tool that uses artificial intelligence to automate the identification of vulnerabilities in Android applications. This tool allows security researchers to create custom taskflow prompts, leading to the discovery of over 20 vulnerabilities. To use the taskflows, a GitHub Copilot license is required, and users can run scripts to audit their projects, with results displayed in an SQLite viewer. Two specific vulnerabilities identified include: 1. OsmAnd app allows malicious applications to track user locations due to improper handling of intent extras in its exported activity. 2. The Wikipedia app has a logic flaw that enables attackers to redirect users to malicious sites via a deeplink mechanism, potentially leading to account takeovers. The GitHub Security Lab has reported a total of 24 vulnerabilities in Android applications, highlighting the effectiveness of AI in security research.

Winsage

September 24, 2026

The Copilot+ PC brand is dead: Microsoft and PC makers quietly pull back on tarnished Windows 11 AI PC branding

In 2024, Microsoft and Qualcomm launched "Copilot+ PCs" to promote AI-first computing, but faced challenges when security concerns led to the postponement of the key feature, Recall. A Microsoft representative stated that while the latest Surface PCs met Copilot+ specifications, they would not carry the branding. Qualcomm's Kedar Kondap explained that the branding aimed to define devices capable of advanced NPU experiences, but those experiences could still be provided without the Copilot+ label. NVIDIA chose not to associate its RTX Spark platform with Copilot+, indicating a lack of market resonance for the branding. Consequently, both OEMs and Microsoft are moving away from the Copilot+ label, despite maintaining the specification baseline for the experiences.

Winsage

September 24, 2026

Decades-old file security flaws found in Android, Linux, macOS, and Windows

Security researchers from Graz University of Technology in Austria have discovered significant vulnerabilities in the file notification systems of major operating systems: Android, Linux, macOS, and Windows. These flaws have existed for decades and can lead to the leakage of sensitive system information. The affected systems include inotify on Linux (since 2005), FileObserver on Android (since 2008), ReadDirectoryChangesW on Windows (since 2000), and FSEvents on macOS (since 2007). The vulnerabilities allow unprivileged users to monitor file events without explicit read permissions, enabling potential attacks such as inter-keystroke timing attacks and website fingerprinting. For example, on Linux, monitoring a readable directory can leak events on files that cannot be read, allowing attackers to achieve a 93.1% to 100% accuracy rate in monitoring keystrokes. Specific vulnerabilities include CVE-2025-68788 on Linux, which received a partial fix in December 2025, and issues on Android where FileObserver can bypass app storage isolation. On macOS, limited information is available due to a lack of bypasses for private directories, while on Windows, monitoring the root directory can reveal the full path of every accessed file, allowing real-time tracking of web activity with a 97.8% accuracy rate. Microsoft has described the issue as "by-design," which has faced criticism. The researchers propose stronger mitigations, such as disallowing monitoring of entire drives on Windows and introducing a permission system for file monitoring on Windows and macOS. Their findings will be presented at the ACM CCS 2026 conference in November in The Hague, Netherlands.

Tech Optimizer

September 22, 2026

This fake LastPass Authenticator app will just shut off your antivirus and leave you open to attack

LastPass has identified a sophisticated scheme targeting users of its Authenticator app, involving SEO poisoning and deceptive GitHub pages that distribute malicious ZIP files disguised as legitimate software. Users searching for "LastPass Authenticator download" may encounter these counterfeit pages, which redirect them to a malicious server delivering a ZIP file containing vsdbg.exe and vsdbg.dll. The executable is a legitimate Microsoft debugging tool exploited to execute the malicious DLL through DLL sideloading, allowing the malware to run undetected. Named Rapuncel by security researchers from Delphos, this malware is undetectable by antivirus engines and targets a hardcoded list of 145 antivirus and endpoint security products, disabling them upon detection. Rapuncel harvests sensitive information, including saved passwords from over 25 web browsers, cryptocurrency wallet files from more than 30 applications, and session tokens from platforms like Discord and Steam. It also captures screenshots and compiles a profile of the infected system, uploading the stolen data to an attacker-controlled server. The malware includes a kernel driver that intercepts web traffic, allowing for advertisement injection and search result manipulation. This campaign has been active for several months, with LastPass vaults remaining unaffected. Users are advised to download applications only from trusted sources. Rapuncel establishes persistence on infected machines by installing itself as a Windows service that starts with the system and terminates activated security products. Removing the kernel driver requires booting into Safe Mode or using external recovery tools, as standard Windows utilities cannot eliminate software operating at that level.

Tech Optimizer

September 21, 2026

Thousands of hacked sites trick you into installing malware

More than 5,400 websites across over 2,200 organizations have been compromised to propagate malware, primarily affecting small businesses like clinics and online retailers. The attack mechanism involves malicious code that triggers a deceptive CAPTCHA, instructing users to execute commands that can download malware. Attackers are using the BNB Smart Chain test network to store instructions, making it harder for investigators to shut down operations. A newer variant of the attack uses WebRTC technology to establish encrypted connections for delivering additional malicious code. To protect against these threats, users should avoid pasting commands from websites, be suspicious of unusual CAPTCHA instructions, use strong antivirus protection, keep systems updated, take action if commands are executed, and small business owners should regularly verify their website's integrity.

AppWizard

September 19, 2026

New RatHat Android Malware Uses AI to Steal Banking Logins, PINs and OTP Codes

Security researchers have identified an Android banking Trojan named RatHat, which utilizes artificial intelligence, accessibility features, and Android Debug Bridge (ADB) to steal financial credentials, PINs, and one-time passcodes. Unlike traditional malware, RatHat employs a live AI assistant that interacts with the Android accessibility tree, allowing it to make real-time decisions based on the victim's screen content. The infection typically starts with social-engineering tactics, leading victims to counterfeit download pages where they are tricked into sideloading a malicious APK. Once installed, RatHat prompts users to enable Android Accessibility Service permissions, which it exploits to navigate Developer Options and enable Wireless Debugging. This grants it shell-level ADB access, allowing it to bypass application sandbox restrictions. RatHat deploys two native binaries for executing commands and maintaining a connection to the attacker's infrastructure. It targets banking applications through credential-stealing overlays and can intercept SMS messages for transaction verification codes. Additionally, it can record touch coordinates to reconstruct PINs and unlock patterns. RatHat includes persistence mechanisms to restore itself after removal, and users are advised to perform a factory reset if they suspect compromise. To reduce infection risk, users should avoid sideloading apps from unknown links, deny unnecessary Accessibility Service requests, and refrain from enabling Developer Options or Wireless Debugging for unfamiliar applications.

AppWizard

September 17, 2026

New Chinese-Made ‘RatHat’ Android Malware Leverages AI to Steal Financial Data

Security researchers at Zimperium have identified a new strain of Android malware called RatHat, which is linked to threat actors from China and is designed to steal sensitive credentials and banking information. RatHat infiltrates devices through phishing sites, malvertising, and SMS phishing (smishing), tricking users into downloading malicious Android package kits (APKs). The malware uses a dropper to activate its payload, which is hidden in encrypted assets, and employs techniques to bypass Android's security measures. RatHat consists of three main components: a malicious Android application, a Go agent (liblocal-service.so), and an FRP client (libmedia_codec.so). The app collects sensitive information such as banking credentials, notifications, 2FA codes, OTP keys, and screen inputs. It features a generative AI user interface-automation engine that communicates in Mandarin and can perform various tasks like determining screen coordinates and issuing navigation commands. The Go agent acts as a command-and-control executor, executing commands to bypass app-level security and manage system-level tasks. The FRP client maintains a secure reverse tunnel to the attacker's server, allowing ongoing remote access to the device. The architecture of RatHat demonstrates the inadequacy of traditional mobile security measures against such advanced threats.

Tech Optimizer

September 15, 2026

AI Is Changing Antivirus From File Matching to Behaviour-Based Malware Detection

Artificial intelligence is transforming malware detection by moving away from traditional file signature reliance to analyzing program actions. Antivirus software previously used signatures to identify known threats, but the rapid emergence of over 450,000 new malware samples daily complicates this method. Attackers now employ techniques like repacking and encryption to evade detection, prompting the need for machine-learning and behavioral techniques for better protection. Modern detection systems assess multiple characteristics of executable files, including their behavior, to identify potential threats, even if they lack recognized signatures. Microsoft's Project Ire exemplifies advanced detection capabilities, functioning as an automated malware analyst that evaluates unknown binaries based on their behavior. Additionally, modern endpoint-security products leverage cloud systems to analyze data from multiple devices, enhancing threat detection through shared intelligence. However, AI detection can still produce false positives and is susceptible to manipulation by attackers. Therefore, effective security systems require a combination of traditional measures, behavioral monitoring, machine learning, and human analysis to navigate complex threats.

Winsage

September 10, 2026

Microsoft patches 966 vulnerabilities: Two Windows zero-days actively exploited

On September 8, 2026, Microsoft released 966 security updates, the largest Patch Tuesday to date, addressing various vulnerabilities. Among these, 105 were classified as critical, including two zero-day vulnerabilities: CVE-2026-81963 and CVE-2026-85880. Both allow authorized local attackers to escalate privileges to SYSTEM level. CVE-2026-81963 is related to the Windows Update Stack, while CVE-2026-85880 involves a heap-based buffer overflow in the Windows Advanced Local Procedure Call (ALPC). The updates included 438 vulnerabilities related to privilege escalation, 258 concerning remote code execution, and 173 involving information disclosures. Users are advised to prioritize the installation of these updates due to the potential exploitation of the two critical vulnerabilities.