detection systems 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.

Tech Optimizer

December 28, 2025

Threat Actors Advertised NtKiller Malware on Dark Web Claiming Terminate Antivirus and EDR Bypass

A malicious entity named AlphaGhoul has introduced a tool called NtKiller, designed to disable antivirus software and endpoint detection systems, posing a threat to organizations using traditional security measures. NtKiller was advertised on an underground forum, claiming to allow attackers to operate undetected while executing malware. It reportedly circumvents security programs like Microsoft Defender, ESET, Kaspersky, Bitdefender, and Trend Micro, and can bypass enterprise-grade Endpoint Detection and Response solutions in aggressive modes. Analysts from KrakenLabs noted that NtKiller uses early-boot persistence mechanisms to evade detection and operates on a modular pricing structure, with core functionality available for [openai_gpt model="gpt-4o-mini" prompt="Summarize the content and extract only the fact described in the text bellow. The summary shall NOT include a title, introduction and conclusion. Text: A malicious entity known as AlphaGhoul has recently surfaced within the cybercriminal underworld, promoting a tool dubbed NtKiller. This tool is engineered to discreetly disable antivirus software and endpoint detection systems, posing a new threat to organizations that rely on traditional security measures. NtKiller was unveiled on an underground forum frequented by individuals seeking to buy and sell hacking services. The advertisement claims that this tool enables attackers to operate undetected while executing their malware on compromised machines. The introduction of NtKiller signifies a formidable challenge for businesses that depend on established security solutions. According to the threat actor, the tool is capable of circumventing several widely-used security programs, including Microsoft Defender, ESET, Kaspersky, Bitdefender, and Trend Micro. Alarmingly, it is also said to bypass enterprise-grade Endpoint Detection and Response (EDR) solutions when utilized in aggressive modes. Analysts from KrakenLabs have observed that NtKiller employs early-boot persistence mechanisms, allowing it to remain concealed and evade detection by security teams once activated. This stealthy approach complicates efforts to identify and eliminate the malware. Further investigation by KrakenLabs revealed that NtKiller operates on a modular pricing structure. The core functionality is available for 0, with additional features such as rootkit capability and User Account Control (UAC) bypass each priced at an extra 0. This pricing model indicates that the tool has been meticulously crafted for commercial distribution within the cybercriminal ecosystem. Beyond merely terminating processes, NtKiller is purported to support advanced evasion techniques, including HVCI disabling, VBS manipulation, and memory integrity circumvention. Technical capabilities The technical features attributed to NtKiller render it particularly perilous in the hands of adept attackers. The tool's early-boot persistence mechanism allows it to embed itself during system startup, prior to the activation of many security monitoring systems. This timing advantage facilitates the execution of malicious payloads in an environment where detection capabilities are significantly diminished. Moreover, the anti-debugging and anti-analysis protections embedded within NtKiller hinder researchers and automated tools from scrutinizing the malware's behavior, resulting in a substantial knowledge gap regarding its true capabilities versus its promotional claims. Another critical feature is the silent UAC bypass option, which enables malware to acquire elevated system privileges without triggering standard Windows prompts that could alert users to suspicious activities. When combined with rootkit functionality, this allows attackers to maintain persistent access to compromised systems while remaining undetected by conventional security measures. It is essential to highlight that these capabilities have yet to be independently verified by third-party researchers, leaving the actual effectiveness of NtKiller uncertain. Organizations are urged to remain vigilant and ensure their security tools incorporate behavioral detection mechanisms that extend beyond signature-based identification to effectively combat such emerging threats. Follow us on Google News, LinkedIn, and X to Get More Instant Updates, Set CSN as a Preferred Source in Google." max_tokens="3500" temperature="0.3" top_p="1.0" best_of="1" presence_penalty="0.1" frequency_penalty="frequency_penalty"] and additional features priced at 0 each. The tool supports advanced evasion techniques, including HVCI disabling, VBS manipulation, and memory integrity circumvention. Its silent User Account Control bypass option allows malware to gain elevated privileges without alerting users. The effectiveness of NtKiller's capabilities has not been independently verified, prompting organizations to enhance their security measures beyond signature-based detection.

Tech Optimizer

November 17, 2025

EVALUSION Campaign Using ClickFix Technique to deploy Amatera Stealer and NetSupport RAT

In November 2025, a sophisticated malware campaign emerged, combining social engineering with advanced data theft tools. The attack begins with a tactic called ClickFix, where users are tricked into executing commands in the Windows Run window, leading to the installation of Amatera Stealer, which extracts sensitive information from browsers, cryptocurrency wallets, and password managers. Following this, attackers deploy NetSupport RAT for remote access to the compromised computer. Amatera Stealer employs advanced evasion techniques, including obfuscated PowerShell code and XOR encryption to mislead security efforts. It was originally marketed as ACR Stealer by a group named SheldIO. The infection process starts with a .NET-based downloader that retrieves payloads encrypted with RC2 from platforms like MediaFire. This downloader is packed with Agile.net, complicating analysis for cybersecurity teams. The malware disables AMSI by overwriting the "AmsiScanBuffer" string in memory, neutralizing Windows' security scanning. Amatera communicates with command servers through encrypted channels, using AES-256-CBC for traffic encryption, making inspection difficult. It aggregates stolen data into zip files and sends them to criminal servers, selectively executing additional payloads targeting high-value assets.

Tech Optimizer

November 15, 2025

RONINGLOADER Weaponizes Signed Drivers to Disable Defender and Evade EDR Tools

A new malware called RONINGLOADER specifically targets Chinese users and can disable security tools. It operates as a multi-stage loader that spreads a modified version of gh0st RAT and bypasses antivirus protections. RONINGLOADER infiltrates systems through fake software installers that mimic legitimate applications like Google Chrome and Microsoft Teams. Once inside, it disables Windows Defender and Chinese security solutions such as Qihoo 360 Total Security and Huorong. The malware uses a signed driver that appears legitimate to Windows but is designed to terminate security processes. If one method of disabling security fails, RONINGLOADER has multiple fallback strategies. The Dragon Breath APT group is behind this campaign, having refined their techniques based on previous operations. The infection begins with a trojanized NSIS installer that drops components onto the victim's system. One installer deploys genuine software, while the other initiates the attack chain. RONINGLOADER creates a directory at C:Program FilesSnieoatwtregoable and deposits two files: Snieoatwtregoable.dll and an encrypted file named tp.png. The DLL decrypts tp.png using XOR encryption and a rotation operation, then loads new system libraries to eliminate security hooks. It elevates privileges using the runas command and scans for active security software, specifically targeting Microsoft Defender, Kingsoft Internet Security, Tencent PC Manager, and Qihoo 360 Total Security. To terminate these processes, it uses a signed driver named ollama.sys, which is digitally signed by Kunming Wuqi E-commerce Co., Ltd. This driver can terminate processes using kernel-level APIs that standard security tools cannot intercept. Additionally, RONINGLOADER blocks network connections for Qihoo 360 before injecting code into the Volume Shadow Copy service process, utilizing Windows thread pools with file write triggers to evade detection.

Winsage

November 14, 2025

All Microsoft Windows Users Warned As New Bot Attacks Confirmed

A t-shirt states, "It gets worse before it gets worse," reflecting the current situation for Microsoft users facing a zero-day vulnerability in Windows. Cybersecurity researchers report a resurgence of DanaBot, a trojan previously thought diminished after Operation Endgame, which resulted in the arrest of 16 individuals and the seizure of millions in stolen cryptocurrency. DanaBot is now operating under version 669, utilizing a new infrastructure and employing malicious emails and malvertising campaigns for attacks. Experts advise Microsoft Windows users to enhance security measures with advanced monitoring and detection systems while remaining vigilant against phishing and malvertising threats.

Tech Optimizer

November 7, 2025

Herodotus Android Banking Malware Takes Full Control Of Device Evading Antivirus

A banking trojan named Herodotus targets Android users globally, operating as Malware-as-a-Service and disguising itself as a legitimate app to lure users into downloading an APK from unofficial sources. Once installed, it gains critical system permissions to perform banking operations on behalf of the user. The malware is primarily distributed through SMS phishing campaigns that lead victims to fraudulent download pages. Herodotus employs overlay attacks to steal credentials and hijack sessions, posing a significant threat to financial security. It uses advanced evasion tactics, including random delays and realistic typing patterns, to avoid detection by traditional antivirus solutions. The trojan captures screen content and keystrokes, allowing real-time monitoring of user activity. Detection is complicated as Herodotus circumvents defenses by installing from unknown sources and executing harmful actions only after obtaining user permissions. Effective defense requires recognizing multiple indicators of compromise, such as suspicious SMS links and behavioral anomalies, which traditional antivirus protection often overlooks.

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.

Tech Optimizer

November 4, 2025

The TechBeat: Introducing Agentic Postgres, the Database for AI Agents (10/25/2025)

Recent advancements in technology include the increasing integration of artificial intelligence (AI) for data analysis and decision-making, the rise of the Internet of Things (IoT) leading to interconnected smart devices, a growing emphasis on cybersecurity with advanced encryption and real-time threat detection, and a focus on sustainability through green technologies and eco-friendly practices.

Winsage

October 31, 2025

Windows LNK File UI Misrepresentation Enables Remote Code Execution Attacks

A vulnerability in the Windows operating system, identified as ZDI-CAN-25373 and disclosed in March 2025, allows advanced persistent threat (APT) actors to deploy malware by manipulating whitespace in Windows LNK files. This technique has been adopted by espionage groups from North Korea, China, Russia, and Iran for data theft and intelligence-gathering. The flaw enables malicious PowerShell commands to be concealed within seemingly legitimate shortcut files, which execute automatically when opened. The exploitation involves weaponized LNK files that initiate obfuscated PowerShell commands to decode embedded TAR archives containing a legitimate Canon printer utility, a malicious loader DLL, and an RC4-encrypted payload with remote access trojan malware. The legitimate executable, although signed with an expired certificate, is trusted by Windows due to its valid timestamp. As of October 2025, Microsoft has not released a patch for this vulnerability, prompting organizations to implement defensive measures against its exploitation.

AppWizard

October 30, 2025

NFC Relay Attack: 700+ Android Apps Harvest Banking Login Details

Researchers at zLabs have identified over 760 malicious Android applications that exploit Near Field Communication (NFC) technology to steal banking credentials and facilitate fraudulent transactions. This cybercrime campaign has expanded from isolated incidents in April 2024 to a widespread operation targeting financial institutions in countries including Russia, Poland, the Czech Republic, Slovakia, and Brazil. The malware utilizes social engineering tactics by impersonating around 20 legitimate banking institutions and government services, such as VTB Bank, Tinkoff Bank, and the Central Bank of Russia. The malware ecosystem is supported by over 70 command-and-control servers and private Telegram channels for data exfiltration. Attackers deceive victims into granting dangerous NFC permissions, allowing the malware to intercept payment data during contactless transactions. Some campaigns use paired applications for data extraction and fraudulent purchases, while others focus solely on data exfiltration. The malware maintains communication with its command-and-control infrastructure, enabling real-time relay attacks to conduct transactions using victims' payment credentials. The rapid spread of this NFC-based payment malware highlights the adaptability of cybercriminals as contactless payment technologies become more common. Financial institutions are urged to enhance fraud detection systems, mobile device manufacturers should tighten NFC permission controls, and users are advised to be cautious when granting NFC access to applications.