antivirus program

Tech Optimizer
May 29, 2025
Hackers are increasingly using sophisticated techniques to entice users into downloading malware, with many individuals still falling victim to basic social engineering tactics. A counterfeit website mimicking the legitimate antivirus program Bitdefender has been created, which could mislead users. This spoofed site hosts a bundled executable named StoreInstaller.exe that contains malware configurations linked to VenomRAT, capable of remote access, credential theft, keylogging, and data exfiltration. The counterfeit site closely resembles the legitimate one, making it difficult for untrained users to distinguish between them. Users are advised to download antivirus software only from reputable sources and to verify the authenticity of the website before proceeding.
Winsage
May 23, 2025
A new tool called Defendnot can disable Windows Defender by masquerading as a legitimate antivirus program, exploiting a feature of Windows that allows only one antivirus solution to operate at a time. When Defendnot is installed, Windows automatically disables Defender, leaving systems vulnerable to cyber threats.
Winsage
May 22, 2025
A new tool called Defendnot can disable Windows Defender by masquerading as another antivirus program, exploiting a limitation of the Windows operating system that prevents multiple antivirus solutions from running simultaneously. When Defendnot is installed, Windows automatically disables Defender, leaving systems vulnerable. Cybersecurity experts recommend using robust antivirus solutions like TotalAV for additional security.
Tech Optimizer
May 21, 2025
A newly developed security program called Defendnot can deceive and disable Windows Defender, even without legitimate antivirus software installed. It alters the system to appear as a genuine antivirus program, allowing hackers to neutralize Windows Defender's protective measures. Defendnot operates through an undocumented API that antivirus software uses to register with the Windows Security Center, causing Microsoft Defender to deactivate. Developed by security researcher es3n1n, Defendnot injects a DLL file into the Taskmgr.exe process, misleading Windows into believing an antivirus is present. Although created for research purposes, it can be misused by cybercriminals. Microsoft Defender recognizes Defendnot as a Trojan and quarantines it upon detection.
Tech Optimizer
May 19, 2025
A security researcher known as es3n1n has developed a program called Defendnot, which disguises itself as an antivirus application and exploits a previously undocumented Windows Security Center (WSC) API. Defendnot registers itself as a legitimate antivirus, causing Windows Defender to disable itself when it detects another antivirus, leaving users vulnerable. Microsoft has responded by enabling Defender to detect and quarantine Defendnot as 'Win32/Sabsik.FL.!ml'. This is not the first version of such a program; a previous iteration was removed due to copyright infringement.
Tech Optimizer
May 19, 2025
A researcher known as es3n1n explored Windows security mechanisms to bypass antivirus software validation checks in the Windows Security Center (WSC). He used tools like dnSpy and Process Monitor to analyze how legitimate antivirus solutions register with WSC. He confirmed that WSC validates the signatures of processes calling its APIs. Previously, es3n1n faced controversy when his project, no-defender, was removed from GitHub due to a DMCA takedown request from a software vendor.
Tech Optimizer
May 18, 2025
A new tool called Defendnot, developed by es3n1n, allows users to disable Windows Defender by using an undocumented Windows Security Center (WSC) API to simulate the presence of another antivirus program. This tool is a successor to the no-defender tool, which was taken down due to legal issues. Defendnot does not use third-party antivirus code and aims for a clean implementation. It disables Microsoft Defender upon activation, leaving users vulnerable to malware as it does not provide real-time scanning. Defendnot is designed to run automatically at Windows startup. Microsoft classifies Defendnot as a Trojan, raising concerns about its potential misuse by malicious actors.
Tech Optimizer
May 18, 2025
Windows 11 accounts for nearly 44% of global desktop users as of April 2025, making it a prime target for cybercriminals, with 83% of malware in 2020 aimed at Windows systems. Microsoft Defender, which comes pre-installed with Windows 11, offers commendable malware protection, basic ransomware protection, a SmartScreen feature for anti-phishing, and a firewall that monitors network traffic. While it provides a solid foundation for security, additional third-party antivirus software can enhance protection, offering more comprehensive features such as superior parental controls, integrated VPN services, and identity theft protection.
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