malicious activities Archives

Tech Optimizer

December 30, 2025

Hackers Advertised VOID ‘AV Killer’ with Kernel-level Termination Claims

A new threat actor named Crypt4You is promoting a tool called VOID KILLER on underground forums and dark web marketplaces. VOID KILLER is designed as a kernel-level antivirus and endpoint detection response process killer, specifically engineered to bypass existing security defenses. It targets the core of operating systems to dismantle protective barriers, posing a significant challenge to contemporary defensive architectures. VOID KILLER can terminate Windows Defender and around fifty consumer-grade antivirus solutions without detection, utilizing polymorphic build techniques to evade signature-based detection systems. It features automatic User Account Control (UAC) bypass mechanisms and can inject any executable file, making it compatible with various malware families. Custom builds of VOID KILLER are priced at three hundred dollars, and payment is accepted in cryptocurrencies. Organizations using Windows Defender, consumer antivirus software, and advanced EDR solutions face increased risk exposure due to this tool.

AppWizard

December 8, 2025

Android Malware FvncBot, SeedSnatcher, and ClayRat Gain Stronger Data Theft Features

Cybersecurity researchers have identified two new families of Android malware, FvncBot and SeedSnatcher, as well as an upgraded version of ClayRat. FvncBot is designed to target mobile banking users in Poland, masquerading as a security application from mBank. It is built from scratch and includes features such as keylogging, web-inject attacks, screen streaming, and hidden virtual network computing (HVNC). It uses a crypting service called apk0day and communicates with a remote server at naleymilva.it.com. FvncBot requests accessibility permissions to operate with elevated privileges and can perform various malicious activities, including exfiltrating data and delivering overlays on targeted applications. SeedSnatcher is disguised as a cryptocurrency wallet app called Coin and is distributed via Telegram. It focuses on stealing cryptocurrency wallet seed phrases and can intercept SMS messages to capture two-factor authentication codes. It employs techniques like dynamic class loading and WebView content injection to evade detection and initially requests minimal permissions before escalating its access. The upgraded ClayRat malware now exploits accessibility services and default SMS permissions, allowing it to record keystrokes, capture screen content, and present deceptive overlays. It has been distributed through fraudulent phishing domains and dropper apps that impersonate legitimate services. The enhanced capabilities of ClayRat enable complete device takeovers and persistent overlays, making it a more significant threat than its previous version.

Tech Optimizer

December 3, 2025

Wacatac Trojan: What Is It And How To Remove It

The Wacatac Trojan is a type of malware first documented in January 2020, known for disguising itself as benign software to trick users into installation. It operates under various aliases, including Trojan:Script/Wacatac and Trojan:Win32/Wacatac, and can connect to Command-and-Control (C2) servers for remote manipulation. Its capabilities include stealing credentials, evading antivirus detection, creating or joining botnets, causing system damage, enabling spyware functions, acting as Remote Access Tools (RATs), and downloading additional malware. Symptoms of infection include sluggish performance, program failures, unexplained storage reductions, and unfamiliar processes. Wacatac spreads through unofficial software, malicious web pages, and phishing emails. Removal is best achieved using reputable antivirus software, while prevention involves avoiding questionable downloads, practicing good digital hygiene, keeping software updated, backing up data, and using quality antivirus solutions. False positives can occur, where legitimate programs are mistakenly flagged as Wacatac.

Tech Optimizer

December 3, 2025

Fileless protection explained: Blocking the invisible threat others miss

Fileless malware operates within a computer's active memory, avoiding detection by traditional antivirus solutions that rely on file scanning. It uses legitimate tools like PowerShell to execute harmful commands without creating files, making it difficult to identify. Cybercriminals can use fileless malware for various malicious activities, including data theft and cryptocurrency mining. Malwarebytes combats fileless attacks through two defense layers: Script Monitoring, which intercepts potentially dangerous scripts at execution, and Command-Line Protection, which scrutinizes command-line tools for suspicious activities. Examples of fileless attacks include malicious email attachments activating PowerShell to download ransomware, hidden JavaScript on websites mining cryptocurrency, and attackers using Windows Management Instrumentation (WMI) to create backdoors. Malwarebytes' Fileless Protection operates automatically in the background, ensuring legitimate applications function normally while monitoring for threats. It is part of a comprehensive security framework that includes machine-learning detection and web protection, designed to stop attacks that do not write files. This protection is included with Malwarebytes Premium, aimed at safeguarding personal and small business systems.

Tech Optimizer

December 2, 2025

When AI Breaks Bad: The Rise of Ransomware and Deepfakes

Artificial Intelligence (AI) is transforming the cybersecurity landscape by enabling sophisticated cyberattacks, such as ransomware and deepfakes. Ransomware has evolved from manual coding to AI-driven automation, making attacks more efficient and harder to stop. AI automates the targeting of victims by analyzing large datasets to identify vulnerabilities. Machine learning allows malware to change its form to evade detection, and ransomware can operate autonomously within networks. Phishing attacks have become more convincing through AI-generated messages that mimic real communications. Deepfakes can create realistic impersonations, leading to financial fraud and extortion, as demonstrated by a 2024 incident resulting in a million loss. Deepfakes also pose risks for manipulation and disinformation, affecting public perception and market dynamics. On the defensive side, AI is utilized in cybersecurity to detect and prevent attacks through anomaly detection, zero-trust security models, and advanced authentication methods. Human training and awareness are crucial for recognizing AI-generated threats. Effective defense requires regulations, shared accountability, and preparedness within organizations, including continuous monitoring and employee training. Collaboration between public agencies and private security firms is essential for a robust response to cyber threats.

AppWizard

December 2, 2025

New Albiriox MaaS Malware Targets 400+ Apps for On-Device Fraud and Screen Control

A new Android malware named Albiriox has emerged, marketed as malware-as-a-service (MaaS). It features a hard-coded list of over 400 applications, including banking and cryptocurrency platforms, and is distributed through social engineering tactics using dropper applications. Initially advertised in late September 2025, it became a full MaaS offering by October, with Russian-speaking threat actors behind its development. Albiriox allows remote control of compromised devices via an unencrypted TCP socket connection and Virtual Network Computing (VNC), enabling attackers to extract sensitive information and perform overlay attacks for credential theft. One campaign targeted victims in Austria using German-language lures and counterfeit Google Play Store listings. Albiriox also utilizes Android's accessibility services to bypass security measures and employs a novel distribution strategy involving a counterfeit website that collects phone numbers. Additionally, another Android MaaS tool, RadzaRat, was introduced, masquerading as a file management utility while offering extensive surveillance and remote control capabilities. RadzaRat can log keystrokes and maintain persistence through specific permissions, highlighting a trend in the availability of sophisticated cybercrime tools.

Tech Optimizer

November 17, 2025

JSON services hijacked by North Korean hackers to send out malware

The Lazarus Group, a North Korean state-sponsored hacking organization, has been using JSON storage services like JSON Keeper, JSONsilo, and npoint.io to host malicious software. They lure victims through deceptive LinkedIn job offers to deploy malware such as BeaverTail, InvisibleFerret, and TsunamiKit, the latter being a multi-stage toolkit that can act as an information stealer or cryptojacker by installing XMRig to mine Monero. Additional malware variants like Tropidoor and AkdoorTea have been deployed through the BeaverTrail framework, targeting software developers for sensitive data and crypto wallet information. The group's use of legitimate websites and code repositories aims to blend malicious activities with normal internet traffic, increasing their chances of success and posing a significant cybersecurity threat.

Tech Optimizer

November 11, 2025

Hackers Exploiting Triofox Flaw to Install Remote Access Tools via Antivirus Feature

A critical security vulnerability (CVE-2025-12480) has been identified in Gladinet's Triofox platform, allowing attackers to bypass authentication and access sensitive configuration pages. This vulnerability has a CVSS score of 9.1 and has been exploited by a threat cluster known as UNC6485 since August 24, 2025. Despite patches issued by Gladinet, attackers created a new admin account to execute malicious code, including a batch script that downloaded tools for remote access. They used these tools for reconnaissance and privilege escalation. Mandiant recommends that Triofox users update to the latest version and audit admin accounts.

Tech Optimizer

November 7, 2025

Herodotus Android Banking Trojan Takes Over Devices, Outsmarts Security Tools

A new Android banking Trojan named Herodotus has emerged, operating under the Malware-as-a-Service (MaaS) model and causing significant disruptions in the mobile banking sector. It primarily spreads through SMS phishing campaigns that disguise malicious links as legitimate messages, leading users to counterfeit web pages to download an APK file outside the official Play Store. Upon installation, Herodotus requests critical permissions, including Accessibility, allowing it to overlay fake screens on real banking apps and capture user data. The malware employs deceptive behaviors to evade detection by traditional antivirus solutions, which often fail to recognize it due to their reliance on signature-based and behavior-driven databases. Research indicates that antivirus providers have overlooked the Herodotus threat, highlighting the need for multilayered defense mechanisms. Pradeo’s Mobile Threat Defense (MTD) solution offers continuous monitoring of device behavior, proactive blocking of phishing links, and alerts for risky off-store installations, effectively neutralizing threats before they escalate.

Winsage

October 31, 2025

China-Linked Hackers Exploit Windows Shortcut Flaw to Target European Diplomats

A China-affiliated threat actor, UNC6384, has been conducting cyber attacks targeting diplomatic and governmental entities in Europe, including Hungary, Belgium, Italy, the Netherlands, and Serbia. These attacks exploit an unpatched Windows shortcut vulnerability (CVE-2025-9491) through spear-phishing emails that appear relevant to diplomatic events. The emails deliver malicious LNK files that deploy PlugX malware via DLL side-loading. PlugX is a remote access trojan that allows extensive control over compromised systems and has been linked to another hacking group, Mustang Panda. Microsoft Defender can detect these attacks, and Smart App Control provides additional protection. The LNK file executes a PowerShell command to extract a TAR archive containing a legitimate utility, a malicious DLL, and an encrypted PlugX payload. The size of the malicious artifacts has decreased significantly, indicating ongoing evolution. UNC6384 has also begun using HTML Application files to load external JavaScript for retrieving malicious payloads, aligning with Chinese intelligence objectives regarding European defense policies.