Threats Tagged 'etherhiding'

RemusStealer is a malware-as-a-service program exhibiting multiple similarities to LummaStealer, including anti-virtual machine checks, credential theft tactics, and Application-Bound Encryption bypass methods. A key distinction is RemusStealer's use of Ethereum smart contracts for C2 communications instead of Steam or Telegram dead drop resolvers. Written in Go, the stealer performs extensive system discovery, gathering information about antivirus products, hardware specifications, and operating systems. It employs hidden desktop environments to evade detection while launching Microsoft Edge and Brave browser processes on non-primary window stations to steal credential files. The malware establishes connections to suspicious domains ending in .shop or .biz and communicates with Ethereum-related infrastructure. This evolution demonstrates attackers' increasing sophistication in leveraging blockchain technology to masquerade malicious communications through smart contracts.

Over five months, four distinct malicious chains operated through the same bulletproof hosting provider, AS202412 registered to OMEGATECH LTD in Seychelles. All chains began with fake CAPTCHA pages (ClickFix technique) that instructed victims to paste commands into Windows Run dialogs. The campaigns used disposable domains with similar naming patterns, compromised legitimate websites, and varied infrastructure including cloud storage, blockchain-resolved C2 addresses, and trojanized installers. Despite different payloads and staging methods, every chain initiated contact through AS202412. The provider expanded from initial allocations to announcing twenty-four /24 prefixes during the observation period. Most browser contacts ended at the lure page without execution, but successful compromises deployed stealers and remote access tools with persistence mechanisms surviving system reboots.

Blackpoint's Adversary Pursuit Group identified ChainScript, a previously unnamed Node.js remote access trojan discovered during ClickFix investigation. The malware disguises itself as legitimate software including Spotify, Zoom Workplace, and Microsoft Teams through malicious Windows Installer packages. ChainScript employs an EtherHiding-style C2 discovery technique utilizing a Polygon smart contract to dynamically locate active WebSocket infrastructure, enabling operators to rotate backend services without rebuilding agents. The RAT provides comprehensive remote access capabilities including interactive shell sessions, file operations, screenshots, payload deployment, cryptocurrency wallet discovery, remote JavaScript execution, self-update mechanisms, and cleanup functions. Multiple builds appeared under different names (ComponentTask33, UpdateDigital, HostShared, OrchidViolet66) while maintaining consistent core agent architecture. Analysis revealed automated contract deployment integrated into the mal...

In June 2026, a new malware family named SloppyRAT was identified, likely used by ransomware-related threat actors to establish footholds for lateral movement. Delivered through multi-stage ClickFix infection chains, the malware features encrypted code blocks, EtherHiding for command-and-control resolution via Polygon JSON-RPC protocol, and multiple anti-analysis techniques including junk code and indirect system calls. SloppyRAT implements certificate pinning to prevent TLS traffic inspection and includes 47 built-in PowerShell-like commands for remote access. The infection chain uses finger.exe, IronPython, and deploys CastleLoader and CastleRAT components before installing SloppyRAT. Despite sophisticated capabilities, the codebase contains numerous software bugs affecting persistence mechanisms and other features, suggesting active development.

An investigation revealed a sophisticated cryptocurrency and credential-stealing operation using Amatera stealer as the primary payload. The attack chain leverages Cloudflare Workers to inject JavaScript stored on BNB Smart Chain, presenting fake Google CAPTCHA prompts that lead to WebDAV-based DLL execution. Two parallel infection chains were identified, one loading through a DLL named 'pf.ch' and another through 'verification.google', both delivering Amatera stealer with different secondary payloads. The 'pf.ch' variant deployed ZigCryptoStealer via NativeAOT loader and a Go-based reverse proxy, while the 'verification.google' variant installed NetSupport Manager with C2 infrastructure in Russia. The operation affects numerous countries with primary focus on stealing cryptocurrency wallets, credentials from password managers, and various authentication data through extensive collection rules targeting over 400 applications.

HighMalwareUnited StatesBrazilBritish Indian Ocean Territory+4#windows#cisco#javascript

A resurgence in Node.js abuse has been observed since February 2026, targeting government departments, technology companies, and hotels. Attackers leverage the legitimate, signed node.exe binary to execute malicious JavaScript payloads, evading signature-based detection. In one intrusion at an Asian technology company, attackers downloaded the official Node.js installer after repeated payload blocks and used it to run an implant communicating with Ethereum blockchain gateways via EtherHiding techniques. The same threat actors compromised a U.S. fintech firm, deploying the Rust-based C2Looper backdoor linked to ransomware operations. Multiple attacks involved ModeloRAT, associated with initial access broker Woodgnat, connected to ransomware families including Qilin, Interlock, Rhysida, Akira, 8Base, Black Basta, and Embargo. Attackers employ ClickFix techniques for initial access and combine living-off-the-land tools with commodity malware.

MediumMalwareUnited States#node.js abuse#cobalt strike#adaptixc2

A Magecart campaign uses EtherHiding techniques to perform card-skimming on e-commerce platforms. Attackers compromise legitimate online storefronts, mainly WooCommerce, but also PrestaShop, Magento, and WordPress sites, injecting malicious loaders disguised as Google Tag Manager code. The skimming payloads are staged inside Ethereum blockchain smart-contract storage, making detection more difficult. Over 40 websites across 15 countries have been impacted since April 2026. The infrastructure involves 144 Sepolia contracts controlled by a single wallet, with 20 distinct contracts and skimmer-hosting domains identified. The malicious code appears as normal analytics but steals credit card data from shoppers.

A sophisticated multi-stage loader dubbed PavinLoader has been identified across multiple distribution campaigns including ClickFix attacks, fake software downloads, and malicious RenPy games. The loader employs heavily obfuscated .NET DLLs, abuses legitimate Windows tools like MSBuild, and utilizes EtherHiding technique to retrieve command-and-control domains via blockchain. The infection chain consists of four main stages: a Loader DLL performing anti-forensics, an EtherHiding Loader obtaining C2 infrastructure, an Anti-Analysis DLL checking for virtualized environments, and a PE Loader delivering final payloads including Amatera Stealer. Evidence suggests PavinLoader may be offered as a Loader-as-a-Service, with common artifacts found across over 200 related files. The campaigns demonstrate sophisticated evasion techniques including custom obfuscation, API hashing, and extensive anti-analysis checks targeting virtualized environments and specific geographic regions.

A masqueraded scheduled task alert triggered an aggressive threat hunt that uncovered a complete FakeAgent intrusion campaign within ten minutes using an automated threat hunting agent. The campaign leveraged malvertising on Bing to distribute trojanized Claude Desktop installers hosted on legitimate Anthropic infrastructure. The attack chain featured DLL sideloading via Java Chromium Embedded Framework, Microsoft Defender tampering, scheduled task persistence masquerading as Microsoft Edge updates, and blockchain-based command-and-control infrastructure using EtherHiding techniques. The hunting agent executed correlated queries across multiple kill chain phases simultaneously, providing confidence-scored findings that enabled rapid validation and remediation. The intrusion delivered SectopRAT malware with infostealing and remote desktop capabilities, requiring full endpoint reimaging and credential resets.

This macOS malware campaign uses social engineering via fake CAPTCHA pages to trick users into running malicious AppleScript commands. It deploys a persistent backdoor that leverages EtherHiding by storing command-and-control (C2) addresses in Polygon blockchain smart contracts, complicating detection. The malware maintains persistence through LaunchAgents and delivers multiple payloads including the AMOS stealer, which targets cryptocurrency wallets, browser credentials, and macOS Keychain data, as well as the XMRig cryptominer for ongoing revenue. The campaign employs advanced evasion techniques such as character-ID obfuscation and abuse of legitimate macOS utilities. Blockchain transaction analysis reveals the full history of C2 infrastructure rotation and funding, aiding defenders despite the malware's memory-resident nature.