KongTuke, a threat actor tracked since 2025, has launched a new campaign using a malicious browser extension called NexShield that impersonates uBlock Origin Lite. The extension causes browser crashes and displays fake security warnings to trick users into executing malicious commands. The campaign targets both home and corporate users, with domain-joined machines receiving a more sophisticated Python-based RAT named ModeloRAT. The attack chain involves multiple stages of obfuscation, anti-analysis techniques, and a Domain Generation Algorithm (DGA) for C2 communication. KongTuke employs extensive fingerprinting to avoid detection in analysis environments. The campaign demonstrates evolving social engineering tactics and a focus on infiltrating enterprise networks for potential lateral movement and data exfiltration.
Nicholas Moore pleaded guilty to repeatedly hacking the U.S. Supreme Court’s filing system and illegally accessing computer systems belonging to AmeriCorps and the Department of Veterans Affairs. The post Tennessee Man Pleads Guilty to Repeatedly Hacking Supreme Court’s Filing System appeared first on SecurityWeek .
This analysis examines Infostealer malware trends during December 2025, focusing on distribution methods, volume, and disguising techniques. Key findings include the prevalence of ACRStealer, LummaC2, and Stealc Infostealers, with malware primarily distributed through SEO poisoning and compromised legitimate websites. The report highlights two significant trends: the abuse of Python scripts for malware distribution and the emergence of cryptocurrency-stealing malware using Tor. Distribution methods evolved from direct blog posts to leveraging legitimate websites and forums. The analysis also notes a shift in malware execution methods, with 65.8% distributed as EXE files and 34.2% using DLL Sideloading techniques. The report emphasizes the importance of vigilance against these evolving threats and provides detailed insights into the malware's behavior and infrastructure.
The incident impacted the personal information of CIRO member firms and their registered employees. The post 750,000 Impacted by Data Breach at Canadian Investment Watchdog appeared first on SecurityWeek .
We've known that social engineering would get AI wings. Now, at the beginning of 2026, we are learning just how high those wings can soar. The post Cyber Insights 2026: Social Engineering appeared first on SecurityWeek .
The critical issue impacts Bluetooth audio accessories with improper Google Fast Pair implementations. The post WhisperPair Attack Leaves Millions of Audio Accessories Open to Hijacking appeared first on SecurityWeek .
China has more than 5,000 cybersecurity companies and all the top 20 firms are working with the government. The post Cybersecurity Firms React to China’s Reported Software Ban appeared first on SecurityWeek .
CVE-2026-21907 is a medium severity vulnerability in Juniper Networks Junos Space affecting versions before 24.1R5. It involves the use of static key ciphers in the TLS/SSL server, which are considered broken or risky cryptographic algorithms. These static key ciphers reduce the confidentiality of data by allowing potential on-path attackers to decrypt traffic and do not support Perfect Forward Secrecy (PFS), compromising long-term confidentiality. The vulnerability does not affect integrity or availability and requires no authentication or user interaction but has a high attack complexity. No known exploits are currently reported in the wild. European organizations using Junos Space for network management should prioritize upgrading to versions 24.1R5 or later to mitigate this risk. Countries with significant Juniper Networks deployments, such as Germany, France, and the UK, are more likely to be impacted due to their extensive telecommunications and enterprise infrastructure. Mitigation involves disabling static key ciphers and enabling PFS-capable cipher suites, alongside applying vendor patches once available.
Researchers have disclosed technical details on a new AMD processor attack that allows remote code execution inside confidential VMs. The post New ‘StackWarp’ Attack Threatens Confidential VMs on AMD Processors appeared first on SecurityWeek .
Vibe coding generates a curate’s egg program: good in parts, but the bad parts affect the whole program. The post Vibe Coding Tested: AI Agents Nail SQLi but Fail Miserably on Security Controls appeared first on SecurityWeek .
A sophisticated cryptocurrency theft operation, orchestrated by the threat actor 'RedLineCyber', has been uncovered. The actor distributes a malicious executable named 'Pro.exe', a Python-based clipboard hijacking trojan designed for silent cryptocurrency theft. This malware continuously monitors the Windows clipboard for cryptocurrency wallet addresses and substitutes them with attacker-controlled addresses. The threat actor exploits trust within Discord communities focused on gaming, gambling, and cryptocurrency streaming. The malware demonstrates moderate technical complexity, using obfuscated Python bytecode and base64-encoded regular expressions for wallet detection. It targets cryptocurrency streamers, casino gaming communities, and users who frequently handle digital asset transactions during live broadcasts. The operation has successfully compromised multiple victims across six major cryptocurrencies.
CastleLoader is a sophisticated malware loader designed to deliver and install malicious components, primarily targeting government entities and critical infrastructure. It employs a multi-stage execution chain involving Inno Setup, AutoIt, and process hollowing to evade detection. The loader delivers information stealers and RATs, enabling credential theft and persistent access. The analysis reveals its stealthy nature, relying on memory-only payloads and API resolution via hashing. The malware's configuration, including C2 infrastructure, was extracted through reverse engineering, providing high-confidence indicators of compromise for detection and analysis.
A North Korean malware was discovered in an Upwork cryptocurrency project, leading to a five-day investigation into active Lazarus Group infrastructure. The malware utilized three infection mechanisms: VSCode auto-execution, backend RCE via Function Constructor, and cookie payload delivery. The infrastructure included Vercel-hosted Stage 1 C2 servers and dedicated Stage 2 C2 servers. A timing oracle allowed for token enumeration, revealing three active campaigns. The payload chain consisted of various modules for data extraction, RAT functionality, and cryptocurrency mining. The investigation uncovered sophisticated persistence mechanisms, masquerading techniques, and a custom binary protocol. Real-time defensive responses from the operators were observed during reconnaissance. The infrastructure blended legitimate-looking development projects with malicious activities for cover.
Turla's Kazuar v3 loader employs sophisticated techniques to evade detection. It uses a VBScript to drop files and execute a native loader, which bypasses security measures and leverages COM for stealth. The loader utilizes control flow redirection, patchless ETW and AMSI bypasses, and COM integration to decrypt and execute three Kazuar v3 payloads (KERNEL, WORKER, BRIDGE) in memory. The attack chain is designed to be resilient and stealthy, exploiting trusted system processes to avoid detection. The malware uses modular architecture and COM subsystem integration to maintain a low profile while carrying out its malicious activities.
