Tag: windows
-
Tropic Trooper Pivots to AdaptixC2 and Custom Beacon Listener
IntroductionOn March 12, 2026, Zscaler ThreatLabz discovered a malicious ZIP archive containing military-themed document lures targeting Chinese-speaking individuals. Our analysis of this sample uncovered a campaign leveraging a multi-stage attack chain where a trojanized SumatraPDF reader deploys an AdaptixC2 Beacon agent, ultimately leading to the download and abuse of Visual Studio (VS) Code tunnels for…
-
Microsoft issues outband patch for critical security flaw in update to ASP.NET Core
UseCustomCryptographicAlgorithms API.A bug in the .NET 10.0.6 package, released as part of the Patch Tuesday updates on April 14, causes the ManagedAuthenticatedEncryptor library to compute the validation tag for the Hash-based Message Authentication Code (HMAC) using an incorrect offset.Incorrect calculation of security hashes results in the .AspNetCore application cookies and tokens being validated and trusted…
-
Most Windows 11 Users Don’t Need Third-Party Antivirus
Microsoft says Windows 11’s built-in security is strong enough for most users, though power users and enterprises may still want third-party protection. The post Microsoft: Most Windows 11 Users Don’t Need Third-Party Antivirus appeared first on TechRepublic. First seen on techrepublic.com Jump to article: www.techrepublic.com/article/news-microsoft-windows-11-no-third-party-antivirus-needed/
-
Most Windows 11 Users Don’t Need Third-Party Antivirus
Microsoft says Windows 11’s built-in security is strong enough for most users, though power users and enterprises may still want third-party protection. The post Microsoft: Most Windows 11 Users Don’t Need Third-Party Antivirus appeared first on TechRepublic. First seen on techrepublic.com Jump to article: www.techrepublic.com/article/news-microsoft-windows-11-no-third-party-antivirus-needed/
-
Kyber ransomware gang toys with post-quantum encryption on Windows
A new Kyber ransomware operation is targeting Windows systems and VMware ESXi endpoints in recent attacks, with one variant implementing Kyber1024 post-quantum encryption. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/kyber-ransomware-gang-toys-with-post-quantum-encryption-on-windows/
-
Tencent’s QClaw AI agent app arrives on Windows and macOS
Tencent has opened an international beta of QClaw, an AI agent application aimed at consumers in Canada, Japan, Singapore, South Korea, and the United States. The first wave … First seen on helpnetsecurity.com Jump to article: www.helpnetsecurity.com/2026/04/22/tencent-qclaw-ai-agent-windows-macos/
-
DinDoor Backdoor Exploits Deno and MSI Installers to Slip Past Detection
DinDoor is a newly documented backdoor that abuses the Deno JavaScript runtime and MSI installer files to execute attacker”‘controlled code while sidestepping traditional detection controls quietly. Hiding behind trusted runtimes and common Windows tooling gives threat actors a flexible way to deploy fileless or low”‘footprint malware into enterprise environments. Instead of shipping a conventional compiled…
-
Zero-Day-Lücken: Angriffe auf Windows-Systeme beobachtet
Hacker haben drei kürzlich bekanntgewordene Sicherheitslücken im Windows Defender ausgenutzt. Nur für eine davon gibt es bisher einen Patch. First seen on golem.de Jump to article: www.golem.de/news/zero-day-luecken-unter-beschuss-angriffe-auf-windows-systeme-beobachtet-2604-207763.html
-
Exploits Turn Windows Defender into Attacker Tool
Three proof-of-concept exploits are being used in active attacks against Microsoft’s built-in security platform; two are unpatched. First seen on darkreading.com Jump to article: www.darkreading.com/cyberattacks-data-breaches/exploits-turn-windows-defender-attacker-tool
-
Gentlemen RaaS Hits Windows, Linux, and ESXi With New C-Based Locker
Gentlemen is a fast”‘growing ransomware”‘as”‘a”‘service (RaaS) operation now targeting Windows, Linux, NAS, BSD, and VMware ESXi with a new locker written in C for hypervisor environments. Its multi”‘platform design and strong defense”‘evasion features make it a high”‘impact threat to corporate networks worldwide. The Gentlemen RaaS emerged around mid”‘2025 and quickly built an affiliate ecosystem by…
-
Gentlemen RaaS Hits Windows, Linux, and ESXi With New C-Based Locker
Gentlemen is a fast”‘growing ransomware”‘as”‘a”‘service (RaaS) operation now targeting Windows, Linux, NAS, BSD, and VMware ESXi with a new locker written in C for hypervisor environments. Its multi”‘platform design and strong defense”‘evasion features make it a high”‘impact threat to corporate networks worldwide. The Gentlemen RaaS emerged around mid”‘2025 and quickly built an affiliate ecosystem by…
-
Remote Code Execution und Evelation of Privilege – CISA warnt vor Angriffen auf Microsoft Exchange und Windows CLFS
First seen on security-insider.de Jump to article: www.security-insider.de/aktive-angriffe-exchange-windows-clfs-schwachstellen-patchen-a-18e96c176dc7a26db31fdca756f24673/
-
Microsoft Defender Flaws Exploited on Windows, Two Left Unpatched
Although the team with Microsoft moved swiftly to patch the BlueHammer vulnerability, other exploits still threaten Microsoft Defender and Windows users. The post Microsoft Defender Flaws Exploited on Windows, Two Left Unpatched appeared first on TechRepublic. First seen on techrepublic.com Jump to article: www.techrepublic.com/article/news-microsoft-defender-flaws-exploited-windows-10-11/
-
Microsoft releases Windows Server update fix to fix its April update fixes
Out-of-band or out of control? First seen on theregister.com Jump to article: www.theregister.com/2026/04/20/microsoft_releases_a_windows_server_update_fix/
-
Microsoft releases Windows Server update fix to fix its April update fixes
Out-of-band or out of control? First seen on theregister.com Jump to article: www.theregister.com/2026/04/20/microsoft_releases_a_windows_server_update_fix/
-
Microsoft releases Windows Server update fix to fix its April update fixes
Out-of-band or out of control? First seen on theregister.com Jump to article: www.theregister.com/2026/04/20/microsoft_releases_a_windows_server_update_fix/
-
Microsoft releases Windows Server update fix to fix its April update fixes
Out-of-band or out of control? First seen on theregister.com Jump to article: www.theregister.com/2026/04/20/microsoft_releases_a_windows_server_update_fix/
-
DFIR Report The Gentlemen SystemBC: A Sneak Peek Behind the Proxy
ey Points The Gentlemen RaaS The Gentlemen ransomware”‘as”‘a”‘service (RaaS) operation is a relatively new group that emerged around mid”‘2025. The operators advertise their services across multiple underground forums, promoting their ransomware platform and inviting penetration testers (and other technically skilled actors) to join as affiliates. The RaaS provides affiliates with multi”‘OS lockers for Windows, Linux,…
-
Microsoft tests Windows Explorer speed, performance improvements
Microsoft is rolling out multiple File Explorer changes to Windows 11 users in the Insider program, including improvements to launch speed and performance. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/microsoft/microsoft-tests-file-explorer-speed-performance-improvements/
-
Zero-Day-Lücken unter Beschuss: Angriffe auf Windows-Systeme beobachtet
Hacker haben drei kürzlich bekanntgewordene Sicherheitslücken im Windows Defender ausgenutzt. Nur für eine davon gibt es bisher einen Patch. First seen on golem.de Jump to article: www.golem.de/news/zero-day-luecken-unter-beschuss-angriffe-auf-windows-systeme-beobachtet-2604-207763.html
-
Microsoft releases emergency updates to fix Windows Server issues
Microsoft has released out-of-band (OOB) updates to fix issues affecting Windows Server systems after installing the April 2026 security updates. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/microsoft/microsoft-releases-emergency-updates-to-fix-windows-server-issues/
-
Windows 11 Dev Build Introduces Improved Secure Boot Oversight and Storage Security
Microsoft has rolled out Windows 11 Insider Preview Build 26300.8170 to the Dev Channel, bringing crucial updates for system security and storage management. Announced by the Windows Insider Program Team on April 10, 2026, this release delivers enhanced oversight for Secure Boot states. It streamlines User Account Control (UAC) prompts. The update provides users with…
-
Fake Helpdesk Attack Uses Teams and Quick Assist to Breach Targets
Attackers are increasingly abusing Microsoft Teams and Windows Quick Assist to run a helpdesk”‘themed social engineering attack chain that leads to full enterprise compromise and stealthy data theft. By impersonating IT support and relying on legitimate tools and protocols, adversaries can move laterally and exfiltrate data while blending into normal admin activity. Using names such as “Help…
-
Hackers are abusing unpatched Windows security flaws to hack into organizations
A security researcher published details of three security vulnerabilities in Windows Defender, and the code used to exploit them. Now, hackers are taking advantage of the vulnerabilities in real-life attacks, according to a cybersecurity firm. First seen on techcrunch.com Jump to article: techcrunch.com/2026/04/17/hackers-are-abusing-unpatched-windows-security-flaws-to-hack-into-organizations/
-
Microsoft Acknowledges Reboot Loop Issue on Windows Servers Following April Patches
Microsoft has confirmed a critical known issue affecting Windows Server 2025 domain controllers after deploying the April 2026 cumulative update KB5082063 (OS Build 26100.32690), released on April 14, 2026. Affected domain controllers are entering repeated restart loops, and a separate but related issue is triggering BitLocker recovery prompts on enterprise-managed systems post-update. Reboot Loop Issue…
-
Totalrecall Reloaded: Tool zeigt Schwachstelle in Windows Recall
Eine neue Version des Tools Totalrecall zeigt, wie sich Daten aus Windows Recall immer noch vergleichsweise leicht abgreifen lassen. First seen on golem.de Jump to article: www.golem.de/news/totalrecall-reloaded-tool-zeigt-schwachstelle-in-windows-recall-2604-207704.html
-
Nach Microsoft-Patchday: Update-Fehler und ständige Reboots bei Windows Server
IT-Admins haben mit den April-Updates für Windows Server allerhand zu tun. Die Updates können fehlschlagen oder wiederholte Reboots auslösen. First seen on golem.de Jump to article: www.golem.de/news/nach-microsoft-patchday-update-fehler-und-staendige-reboots-bei-windows-server-2604-207693.html
-
Some Windows servers enter reboot loops after April patches
Microsoft warns that some Windows domain controllers are entering restart loops after installing the April 2026 security updates. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/microsoft/microsoft-warns-of-reboot-loops-affecting-some-domain-controllers/
-
Recently leaked Windows zero-days now exploited in attacks
Threat actors are exploiting three recently disclosed Windows security vulnerabilities in attacks aimed at gaining SYSTEM or elevated administrator permissions. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/recently-leaked-windows-zero-days-now-exploited-in-attacks/