crypto security Archives

Winsage

March 2, 2026

RAT Malware Via Windows Explorer Puts Crypto at Risk

Cofense Intelligence reported that threat actors are exploiting Windows File Explorer and WebDAV servers to deliver Remote Access Trojans (RATs) to corporate systems, bypassing browser security measures. This method allows attackers to infiltrate machines without using web browsers, taking advantage of File Explorer's ability to connect to remote WebDAV servers. Despite WebDAV being deprecated by Microsoft in November 2023, it is still supported in Windows, creating a vulnerability. The campaigns began in February 2024, with a significant increase in September 2024, and 87% of these campaigns deliver multiple RATs, including XWorm, Async RAT, and DcRAT. Victims typically receive phishing emails disguised as invoices, containing URL or LNK shortcut files that initiate a WebDAV connection. The attacks often utilize Cloudflare Tunnel for hosting malicious WebDAV servers, making the traffic appear legitimate. Notably, 50% of affected campaigns are in German, while 30% are in English. The report emphasizes the risks posed to individuals holding digital assets, as RATs can access sensitive information, including crypto wallet files. Organizations are advised to monitor network traffic for Cloudflare Tunnel instances and educate users about the risks associated with File Explorer's capabilities.

Tech Optimizer

December 29, 2025

Best antivirus software of 2025: security, speed, pricing

In 2025, the best antivirus software includes: - MacKeeper: Best for Mac users, cryptocurrency holders, and identity protection. Key features include real-time protection against malware, ID Theft Guard, adware cleaning, built-in VPN, and system performance tools. Pricing starts around €9.86/month. - Norton 360: Best for families and multi-device protection. It offers advanced malware protection, a VPN, cloud backup, Dark Web monitoring, and parental controls. Pricing is approximately .50–/month. - Bitdefender: Best for aggressive ransomware protection with minimal CPU load. It features ransomware recovery, advanced threat detection, multi-layer malware defense, and a secure password manager. Pricing starts from .99–.99/year. - McAfee: Best for identity theft monitoring and financial protection. It includes effective malware detection, credit checks, and privacy tools. Pricing ranges from .99–.99/year. - Surfshark One: Best for lightweight antivirus combined with privacy tools. Key features include real-time antivirus and a VPN. Pricing starts from €1.69-€4.19/month. - Avast: Best for free antivirus features. It offers free real-time protection and a Ransomware Shield. The free version is available, with premium starting around .99/year. - AVG: Best for beginners needing a simple, effective free antivirus. It provides real-time threat protection and ransomware defense. The free version is available, or .68/year for advanced features. - Malwarebytes: Best for removing active malware and adware. It excels in malware cleanup and fast scans. Pricing starts from .49/year. - TotalAV: Best for strong first-year pricing and antivirus + privacy bundle. It protects against malware and includes a VPN. Pricing is approximately .00 for the first year, renewing at .99/year. Pricing information is based on rates available in December 2025.

Tech Optimizer

October 24, 2025

Why Aren’t Antivirus Programs Enough To Protect Crypto?

Cryptocurrency has introduced a decentralized approach to financial transactions, but it faces significant security challenges, including vulnerability to cyberattacks, theft, and fraud. Traditional antivirus software has limitations, such as reliance on signature-based detection, which struggles against emerging and polymorphic malware. Behavioral detection methods also have shortcomings, as stealth malware can disguise itself and conditional activation can evade detection. Fileless malware techniques and human error, such as phishing and weak password hygiene, further complicate security. To enhance security, cryptocurrency users should adopt a multi-layered strategy that includes using hardware wallets for offline storage of private keys, implementing multi-factor authentication (MFA), and utilizing dedicated anti-malware tools. Safe browsing habits and regular software patches are also essential, along with securely backing up private keys.

Tech Optimizer

August 23, 2025

Kerberus Acquires Refract to Build First Crypto Antivirus

Kerberus Cyber Security acquired Refract, the developer of the Pocket Universe browser extension, in a seven-figure deal confirmed on August 16, 2025. This acquisition aims to create the first dedicated antivirus solution for the cryptocurrency industry. Kerberus plans to enhance its existing Sentinel3 browser extension and expand its security framework to cover all Ethereum Virtual Machine (EVM) chains and Solana. The development of a minimal viable product is expected to take at least four months, with Pocket Universe’s co-founders transitioning to advisory roles. Kerberus emphasizes user privacy by not requesting access to private keys or user funds and warns against potential antivirus scams in the crypto space.

Tech Optimizer

August 22, 2025

Kerberus’ Strategic Acquisition of Pocket Universe and the Rise of Crypto Antivirus Infrastructure: A First-Mover Advantage in a High-Growth Niche

Kerberus acquired Pocket Universe on August 16, 2025, in a seven-figure deal to enhance security for cryptocurrency users by developing a browser-level antivirus solution. This acquisition addresses the emerging threat of browser-based malware, which operates without user interaction, and aims to establish a cohesive platform that intercepts malicious code. Kerberus plans to integrate Pocket Universe's fraud-prevention capabilities into its Sentinel3 browser extension, extending protection across Ethereum Virtual Machine (EVM) chains and Solana. The company has 200,000 weekly active users and is set to launch a minimal viable product (MVP) for its antivirus solution within four months. Strategic partnerships with Pocket Universe's co-founders and Ran Neuner of Onchain Capital further bolster Kerberus' credibility in the crypto security sector.