Operation Archives

Winsage

June 3, 2025

Windows 11 news and updates: Sora video AI comes to Bing while USB-C changes will make all of our lives easier

Microsoft has made adjustments to Windows 11 and Windows 10 to comply with the Digital Markets Act for users in the European Economic Area, including stopping prompts to set Edge as the default browser and automatically pinning users' preferred browsers to the Taskbar. The optional update KB5058499 (OS Build 26100.4202) for Windows 11, released on May 28, 2025, improves gaming stability and includes upgrades to AI tools. OpenAI's Sora AI model is now available globally in the Bing Video Creator within the Bing mobile app. Notepad has added support for Markdown syntax. Microsoft has committed that all USB-C ports on Windows 11 will support data, charging, and display functionalities, with USB4 ports being compatible with Thunderbolt 3 and USB4 peripherals. The release date for Windows 11 version 25H2 is anticipated between September and October 2025.

Tech Optimizer

June 2, 2025

AVCheck cyber crime service snared in police takedown

An international law enforcement initiative has dismantled an online software crypting syndicate that helped cybercriminals evade malware detection. The operation, led by the FBI's Houston Field Office and involving agencies from the Netherlands, Finland, and the US Secret Service, resulted in the seizure of four domains, the takedown of 300 servers, the neutralization of 650 domains, and the issuance of nearly two dozen international arrest warrants. Matthijs Jaspers from the Netherlands' High Tech Crime Team highlighted the challenges of tracking cybercriminals and the importance of collaborative efforts in combating cybercrime.

Tech Optimizer

June 2, 2025

Key service for malware developers taken offline

The takedown of AVCheck, a major Counter Antivirus (CAV) service used by cybercriminals, disrupts their ability to test malware against antivirus detection, thereby hindering successful attacks. Matthijs Jaspers from the High Tech Crime Team highlighted that this operation is crucial in combating organized cybercrime, as it prevents early-stage criminal activities. The investigation revealed connections between AVCheck and other services like Cryptor.biz and Crypt.guru. Additionally, law enforcement has taken proactive measures, including deploying a fake login page to deter AVCheck users and collaborating with Project Melissa to target malware services. The need for coordinated efforts among various sectors is emphasized to effectively combat cybercrime.

Tech Optimizer

June 2, 2025

International authorities dismantle AVCheck in cybercrime operation

International authorities have dismantled AVCheck, a platform used by cybercriminals to test malware against antivirus software. The website avcheck.net now displays a seizure notice from the US Department of Justice, FBI, US Secret Service, and Dutch police. AVCheck was one of the largest counter antivirus services globally, aiding cybercriminals in evaluating their malware's stealth capabilities. Investigators found links between AVCheck's administrators and crypting services like Cryptor.biz and Crypt.guru. Law enforcement had placed a fake login page on AVCheck to warn users about legal risks before its shutdown on May 27, 2025. Undercover agents confirmed the illegal nature of AVCheck through transactions and connections to ransomware attacks. The FBI has also warned about the Silent Ransom Group, which has targeted law firms in the US using social engineering tactics.

Tech Optimizer

June 1, 2025

Supercharging vector search performance and relevance with pgvector 0.8.0 on Amazon Aurora PostgreSQL

The Amazon Aurora PostgreSQL-Compatible Edition has integrated support for pgvector 0.8.0, enhancing vector search capabilities significantly. This version achieves up to 9x faster query processing and delivers 100x more relevant search results compared to previous iterations. Key improvements in pgvector 0.8.0 include: - Up to 5.7x improvement in query performance for specific patterns. - Introduction of the iterative_scan feature, enhancing recall for filter queries requiring approximate nearest neighbor (ANN) index searches. - Improved cost estimation for more efficient query planning, allowing the selection of traditional indexes for complex filtered searches. - Flexible performance tuning with two modes for iterative_scan: relaxed_order and strict_order. Previous versions faced challenges with overfiltering, where combining vector similarity search with traditional SQL filters resulted in fewer results than expected. The HNSW indexing algorithm accelerates vector similarity searches by creating a multi-layered graph structure for efficient navigation. Iterative index scans in pgvector 0.8.0 improve query reliability and performance by applying filters during the scanning process, reducing false negatives and enhancing performance. The configuration options for iterative scanning include off, strict_order, and relaxed_order, with relaxed_order providing the best balance between performance and accuracy. In performance tests, pgvector 0.8.0 demonstrated substantial improvements across various query patterns, with significant enhancements in result completeness and recall. The database can now efficiently handle enterprise-scale applications, such as e-commerce and recommendation systems, with high performance and result quality even as product catalogs expand. Best practices for deploying pgvector 0.8.0 include using HNSW with recommended parameters, creating additional indexes on commonly filtered metadata columns, and tuning query parameters based on specific use cases. Operational best practices involve using Graviton4-based instances for optimal performance, monitoring and tuning slow vector queries, and considering partitioning for very large tables.

Winsage

June 1, 2025

I just tested the new Legion Go S — and it’s the Steam Deck killer I’ve been waiting for

The Lenovo Legion Go S is a handheld gaming device that operates on SteamOS, starting at a price of 9. It features an AMD Z2 Go chip, 16GB of RAM, and 512GB of storage in the base model, while the reviewed unit has an AMD Ryzen Z1 Extreme chip, 32GB of RAM, and 1TB of storage. The device has an 8-inch WQXGA (1920 x 1200) LCD display, a weight of 1.63 pounds, and includes ports such as a Micro SD card slot, two USB-C ports, and a headphone jack. The design is ergonomic with a Nebula color scheme, and it has responsive controls. The SteamOS version outperforms the Windows 11 variant in gaming performance, achieving higher frame rates in gameplay tests.

Tech Optimizer

May 31, 2025

Devious new ClickFix malware variant targets macOS, Android, and iOS using browser-based redirections

ClickFix attacks have evolved from targeting Windows systems to also affecting macOS, iOS, and Android devices. The new version starts with a compromised website where cybercriminals inject JavaScript code that redirects users to a fake URL shortener. This action leads to a download page serving malware. On macOS, the attack executes a malicious shell script via a terminal command, while on Android and iOS, it can occur without user interaction, allowing malware to be downloaded simply by visiting the compromised site. The malware is packaged in a .TAR archive and has been flagged by multiple antivirus programs.

Tech Optimizer

May 31, 2025

Authorities Dismantled AVCheck, a Tool For Testing Malware Against Antivirus Detection

Law enforcement agencies from multiple nations dismantled a cybercriminal operation that provided malware testing services to evade antivirus detection. This effort led to the seizure of four domains and their servers, disrupting infrastructure that facilitated ransomware attacks globally. U.S. Attorney Nicholas J. Ganjei announced the disruption of an online software crypting syndicate that helped cybercriminals keep their malware undetected. The seized domains offered counter-antivirus tools and crypting services, allowing criminals to obfuscate malware and gain unauthorized access to systems. Investigators conducted undercover purchases and analyzed services, revealing connections to ransomware groups targeting victims in the U.S. and internationally. The operation, part of Operation Endgame, involved collaboration among the U.S., Netherlands, France, Germany, Denmark, Ukraine, and Portugal, with the FBI Houston Field Office leading the U.S. investigation. The seizures occurred on May 27.

Tech Optimizer

May 30, 2025

Police takes down AVCheck antivirus site used by cybercriminals

An international law enforcement initiative has dismantled AVCheck, a service that allowed cybercriminals to test malware against antivirus software. The official website, avcheck.net, now displays a seizure banner from U.S. and Dutch authorities. AVCheck was one of the largest counter antivirus services, providing insights into malware evasion tactics. Investigators found connections between AVCheck's administrators and crypting services, which help obfuscate malware. Law enforcement created a deceptive login page to warn users of legal consequences. The takedown occurred on May 27, 2025, as part of Operation Endgame, which also seized 300 servers and 650 domains linked to ransomware attacks.

Tech Optimizer

May 30, 2025

Dutch police takes Counter Antivirus service AVCheck offline

The Dutch Team High Tech Crime, in collaboration with international partners, has dismantled the counter-antivirus service AVCheck, which was used by cybercriminals to make malware undetectable. AVCheck was one of the largest services of its kind, allowing malware developers to test their software against antivirus programs. The operation involved cooperation from the Netherlands, the United States, and Finland, and was executed by the High Tech Crime Team under the National Public Prosecutor’s Office. The investigation not only shut down AVCheck but also gathered evidence against its administrators and users, including those of related services like Cryptor.biz and Crypt.guru. Additionally, a fake login page was launched to deter AVCheck users, and collaborations with antivirus organizations were established as part of Project Melissa. This action is connected to Operation Endgame, which previously targeted other malware services.