file encryption Archives

Tech Optimizer

May 14, 2025

Best Antivirus Software (2025): ESET Recognized as Top Cybersecurity Solution by Software Experts

ESET is recognized as a leading antivirus provider in 2025, known for its robust security solutions that effectively combat rising cyber threats such as phishing, ransomware, and zero-day exploits. The company's offerings include heuristic and behavioral detection, ransomware and phishing protection, exploit blocker technology, and low resource usage, ensuring minimal impact on system performance. ESET provides various products for home users, including ESET HOME Security Essential, Premium, and Ultimate, as well as a Small Business Security package for up to 25 devices and scalable solutions for larger organizations. Pricing for home products starts at .99/year, with multi-device and multi-year discounts available. ESET operates in over 200 countries, utilizing a global network for real-time threat intelligence and maintaining a commitment to effective digital security since its establishment in 1992.

Winsage

May 7, 2025

Play ransomware exploited Windows logging flaw in zero-day attacks

The Play ransomware gang exploited a critical vulnerability in the Windows Common Log File System, identified as CVE-2025-29824, to execute zero-day attacks, gaining SYSTEM privileges and deploying malware. Microsoft recognized this flaw and issued a patch during last month's Patch Tuesday. The gang targeted sectors including IT and real estate in the U.S., the financial sector in Venezuela, a Spanish software company, and retail in Saudi Arabia. They used the PipeMagic backdoor malware to deploy the CVE-2025-29824 exploit and install ransomware payloads. Symantec's Threat Hunter Team linked these activities to the Play ransomware-as-a-service operation, noting the use of the Grixba infostealer tool. The Play ransomware group, active since at least June 2022, employs double-extortion tactics and has compromised approximately 300 organizations globally as of October 2023. Notable victims include Rackspace, Arnold Clark, the City of Oakland, Dallas County, Antwerp, and Microchip Technology.

Tech Optimizer

April 13, 2025

Panda Dome review

Panda Security, a Spanish antivirus company, has introduced various cybersecurity innovations since its founding, including daily signature updates in 1998, behavioral monitoring in 2004, and cloud scanning in 2007. It offers several plans for home users: Panda Dome Essential, Advanced, Complete, and Premium, each with increasing features such as firewall protection, WiFi security, online shopping safeguards, and a Dark Web Scanner. All plans include a 30-day free trial. Panda Dome received an AAA award from SE Labs for a Total Accuracy Rating of 99% without false positives between October and December 2024, outperforming Microsoft Defender and Webroot but not achieving the perfect scores of Avast, Kaspersky, and McAfee. The AV-Test Product Review awarded Panda a score of 6/6 for protection and usability, and 5.5/6 for performance. However, Panda Free Antivirus had a higher number of false alarms in AV-Comparatives’ False Alarm Test. The Panda Dome Advanced plan, priced at .99 for the first year, includes parental controls and enhanced ransomware protection. It offers multiple scanning options and reasonable scan times. Its anti-ransomware features include behavior-based detection, file access control, and backup capabilities. Panda Dome Complete, priced at .99 for the first year, adds system cleanup tools and a password manager, allowing users to optimize system performance and securely manage passwords. It also includes file encryption and shredding features. Panda Dome Premium, priced at .99 for the first year, provides unrestricted VPN access, an update manager, and unlimited premium technical support. It allows secure browsing across over 60 countries for up to five devices and includes features to keep systems updated and secure.

Winsage

April 9, 2025

Exploitation of CLFS zero-day leads to ransomware activity

The Microsoft Threat Intelligence Center (MSTIC) and Microsoft Security Response Center (MSRC) identified a zero-day elevation of privilege vulnerability in the Windows Common Log File System (CLFS), designated as CVE-2025-29824. This vulnerability has been exploited by the PipeMagic malware, attributed to the group Storm-2460, affecting organizations in various sectors across the U.S., Venezuela, Spain, and Saudi Arabia. Microsoft released security updates on April 8, 2025, to address this vulnerability. The exploit allows attackers with standard user privileges to escalate their access, and it was executed from a dllhost.exe process. The exploit utilizes memory corruption techniques and the RtlSetAllBits API to gain all privileges and inject processes into SYSTEM processes. Post-exploitation, the attackers injected a payload into winlogon.exe, leading to ransomware activity characterized by file encryption and the creation of ransom notes. Indicators of compromise include the creation of a CLFS BLF file at C:ProgramDataSkyPDFPDUDrv.blf, command lines associated with ransomware activities, and specific domains linked to PipeMagic. Microsoft advises applying security updates promptly and recommends strategies for mitigating ransomware threats, including enabling cloud-delivered protection and utilizing device discovery.

Winsage

February 27, 2025

LCRYX Ransomware Attacks Windows Machines by Blocking Registry Editor and Task Manager

LCRYX ransomware, a VBScript-based threat, re-emerged in February 2025 after first appearing in November 2024. It encrypts files with the .lcryx extension and demands a ransom of 0 in Bitcoin for decryption. The ransomware operates with administrative privileges, disables essential system tools like Task Manager and Command Prompt, and restricts access to the Control Panel. It prevents the execution of diagnostic tools and disables inactivity timeouts. LCRYX ensures persistence by modifying registry settings and remapping keyboard keys. It uses a combination of Caesar cipher and XOR encryption techniques, eliminates backups, and makes recovery nearly impossible. The malware terminates essential processes, overwrites the Master Boot Record, and disables real-time monitoring features of antivirus solutions. After encryption, it generates a ransom note directing victims to a payment website. Some variants display pop-ups revealing the victim’s IP address or launch unrelated applications. Users are advised to implement comprehensive security solutions and maintain regular backups.