Tax Search Ads Deliver ScreenConnect Malware Using Huawei Driver to Disable EDR

A large-scale malvertising campaign active since January 2026 has been observed targeting U.S.-based individuals searching for tax-related documents to serve rogue installers for ConnectWise ScreenConnect that drop a tool named HwAudKiller to blind security programs using the bring your own...

CVE-2023-31096

An issue was discovered in Broadcom LSI PCI-SV92EX Soft Modem Kernel Driver through 2.2.100.1 aka AGRSM64.sys. There is Local Privilege Escalation to SYSTEM via a Stack Overflow in RTLCopyMemory IOCTL 0x1b2150. An attacker can exploit this to elevate privileges from a medium-integrity process to...

Driver of destruction: How a legitimate driver is being used to take down AV processes

Introduction In a recent incident response case in Brazil, we spotted intriguing new antivirus AV killer software that has been circulating in the wild since at least October 2024. This malicious artifact abuses the ThrottleStop.sys driver, delivered together with the malware, to terminate numero...

Checkpoint ZoneAlarm Driver Flaw Exposes Users to Credential Theft

Credential theft alert! Venak Security discovers a BYOVD attack using .SYS drivers to bypass Windows security. Learn how…...

February 11, 2025—KB5051979 (OS Build 20348.3207)

February 11, 2025—KB5051979 OS Build 20348.3207 For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows Server 2022, see its update history page. Note Follow @WindowsUpdate to find out wh...

CVE-2024-51324

An issue in the BdApiUtil driver of Baidu Antivirus v5.2.3.116083 allows attackers to terminate arbitrary process via executing a BYOVD Bring Your Own Vulnerable Driver attack...

January 14, 2025—KB5050021 (OS Builds 22621.4751 and 22631.4751)

January 14, 2025—KB5050021 OS Builds 22621.4751 and 22631.4751 For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows 11, version 23H2, see its update history page. Note Follow...

January 14, 2025—KB5050009 (OS Build 26100.2894)

January 14, 2025—KB5050009 OS Build 26100.2894 For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows 11, version 24H2, see its update history page. Note Follow @WindowsUpdate to find ou...

January 14, 2025—KB5050048 (Monthly Rollup)

January 14, 2025—KB5050048 Monthly Rollup Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make sure all Subset of endpoints for ESU on...

January 14, 2025—KB5049993 (OS Build 14393.7699)

January 14, 2025—KB5049993 OS Build 14393.7699 11/19/20 For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows 10, version 1607, see its update history page. Important: Windows updates d...

RansomHub Group Deploys New EDR-Killing Tool in Latest Cyber Attacks

A cybercrime group with links to the RansomHub ransomware has been observed using a new tool designed to terminate endpoint detection and response EDR software on compromised hosts, joining the likes of other similar programs like AuKill aka AvNeutralizer and Terminator. The EDR-killing utility h...

Reaper - Proof Of Concept On BYOVD Attack

Reaper is a proof-of-concept designed to exploit BYOVD Bring Your Own Vulnerable Driver driver vulnerability. This malicious technique involves inserting a legitimate, vulnerable driver into a target system, which allows attackers to exploit the driver to perform malicious actions. Reaper was...

GHOSTENGINE Exploits Vulnerable Drivers to Disable EDRs in Cryptojacking Attack

Cybersecurity researchers have discovered a new cryptojacking campaign that employs vulnerable drivers to disable known security solutions EDRs and thwart detection in what's called a Bring Your Own Vulnerable Driver BYOVD attack. Elastic Security Labs is tracking the campaign under the name...

Lazarus Hackers Exploited Windows Kernel Flaw as Zero-Day in Recent Attacks

The notorious Lazarus Group actors exploited a recently patched privilege escalation flaw in the Windows Kernel as a zero-day to obtain kernel-level access and disable security software on compromised hosts. The vulnerability in question is CVE-2024-21338 CVSS score: 7.8, which can permit an...

Kasseika Ransomware Employs BYOVD Tactic to Impair Defenses

Summary: The ransomware operation Kasseika has recently been identified using the Bring Your Own Vulnerable Driver BYOVD tactic. This involves exploiting vulnerabilities in a loaded driver to disable antivirus software before initiating the file encryption process. Through this strategy, the...

Kasseika Ransomware Using BYOVD Trick to Disarms Security Pre-Encryption

The ransomware group known as Kasseika has become the latest to leverage the Bring Your Own Vulnerable Driver BYOVD attack to disarm security-related processes on compromised Windows hosts, joining the likes of other groups like Akira, AvosLocker, BlackByte, and RobbinHood. The tactic allows...

Kasseika Ransomware Deploys BYOVD Attacks, Abuses PsExec and Exploits Martini Driver

In this blog, we detail our investigation of the Kasseika ransomware and the indicators we found suggesting that the actors behind it have acquired access to the source code of the notorious BlackMatter ransomware...

How ransomware operators try to stay under the radar

An often heard remark is that when your security solution notices a ransomware attack, it’s already too late. Theres a lot of truth in that, if you consider the encryption process to be the ransomware attack. However, these days encryption is just a part of many ransomware attacks. Some of the...

Researchers Find 34 Windows Drivers Vulnerable to Full Device Takeover

As many as 34 unique vulnerable Windows Driver Model WDM and Windows Driver Frameworks WDF drivers could be exploited by non-privileged threat actors to gain full control of the devices and execute arbitrary code on the underlying systems. "By exploiting the drivers, an attacker without privilege...

BlackCat Operators Distributing Ransomware Disguised as WinSCP via Malvertising

Threat actors associated with the BlackCat ransomware have been observed employing malvertising tricks to distribute rogue installers of the WinSCP file transfer application. "Malicious actors used malvertising to distribute a piece of malware via cloned webpages of legitimate organizations," Tre...