A Chinese web-development framework called DCloud Uni-App has become the technical foundation for over 236,000 scam domains since 2022, powering fake cryptocurrency exchanges, pig-butchering operations, wallet drainers, gambling platforms, and brand-impersonation sites. The framework gained prominence after the 2024 RainbowEx cryptocurrency scam in Argentina, which defrauded residents of San Pedro. Similar operations include the Lightning Shared Scooter Co. (LSSC) scam in the United States, which caused millions in losses across multiple states, and the currently-active Yuechi Sharing Technology Ltd. bicycle-sharing investment scam. These operations use legitimate hosting providers, with approximately 6% utilizing bulletproof hosting, particularly CTG Server. The scams target victims globally through WhatsApp, Telegram, and social media, converting victims into recruiters for pyramid-style operations. Enterprise exposure reaches over 985 distinct organizations across 25 industry verticals, with over five m...
Group-IB analyzes Millenium RAT version 4.*, a remote access trojan that has undergone significant architectural changes from .NET to native C++, while continuing to leverage Telegram Bot API for command and control without requiring dedicated server infrastructure. The malware is distributed as Malware-as-a-Service by developer 'ShinyEnigma' for $50-90 USD. Active exploitation campaigns are conducted by threat actor cluster 'Y2K Operators' using social engineering tactics including fraudulent utilities, hacking toolkits, software cracks, gaming lures, and trojanized cybercrime tools. The trojan enables exfiltration of sensitive browser and system data, screenshot and audio capture, keylogging, and arbitrary executable downloads. Over 62,000 compromised endpoints across more than 160 countries have been identified, with 39,730 infections occurring in Q1 2026 alone, demonstrating accelerating infection rates.
A new macOS ClickFix campaign employs fake CAPTCHA pages to deceive users into executing malicious Terminal commands. The attack chain downloads and invisibly mounts a DMG file containing a self-signed information-stealer application bundle. This payload, assessed as belonging to the AMOS (Atomic macOS Stealer) lineage—specifically the Odyssey variant—prompts users for passwords through fake System Preferences dialogs. The stealer harvests extensive data including browser credentials, cryptocurrency wallet information from 13 standalone applications and 201 browser extensions, messaging app data, Apple Notes, Safari cookies, and macOS keychain entries. Exfiltrated data is compressed and sent to two command-and-control servers. The malware establishes persistence via LaunchAgent and trojanizes legitimate cryptocurrency applications including Ledger Live and Trezor Suite, replacing them with compromised versions downloaded from attacker infrastructure.
Prinz Eugen is a newly discovered Go-based ransomware family first observed in April 2026, attributed to an actor known as ROOTBOY. The encryptor employs sophisticated techniques including ChaCha20-Poly1305 encryption, prioritizes recently modified files to maximize pressure on victims, and implements anti-forensic measures such as memory scrubbing and self-deletion. Unlike typical ransomware, it leaves no ransom note on disk, conducting all extortion communications out-of-band through leak sites and direct contact. The threat actor gains initial access through compromised RDP credentials, uses legitimate RMM tools like RemotePC for persistence, and creates backdoor admin accounts. Victims span multiple countries and sectors, with notable incidents including Standard Bank Group in South Africa and Transitions Pro Centre Val de Loire in France.
In May 2026, security researchers observed an attack campaign distributing KimJongRAT through GitHub and other legitimate services. KimJongRAT, used by the North Korean APT group Kimsuky since 2013, combines information stealing and remote access capabilities. The infection chain begins with phishing emails containing shortened URLs redirecting to GitHub Releases hosting malicious ZIP files. Victims execute LNK files that download HTA files from GitHub, which then retrieve subsequent payloads from Google Drive. Recent variants demonstrate significant evolution: they now dynamically fetch C2 addresses from external sources rather than hardcoding them, enabling operators to maintain persistent access despite infrastructure takedowns. Additionally, new versions include MeshAgent RMM installation for redundant access. The campaign exemplifies Living Off Trusted Sites (LOTS) techniques, abusing legitimate platforms like GitHub, Google Drive, and Dropbox to evade detection.
ESET Research contributed to a global disruption operation targeting the Amadey botnet and Stealc infostealer, both malware-as-a-service offerings. The operation, coordinated by Microsoft Digital Crimes Unit, BitSight, Lumen, and MBSD, impacted approximately 50 domains and nearly 200 active IP-based command and control servers. ESET provided technical analyses, statistical information, C&C server lists, encryption keys, campaign identifiers, and affiliate-level insights gathered from three years of tracking. Both malware families operate through affiliate networks where operators deploy their own infrastructure, making disruption efforts particularly challenging. Amadey primarily functions as a modular loader distributing additional payloads, while Stealc focuses on credential theft from browsers, crypto wallets, and applications. The largest Amadey botnet cluster accounted for 34% of all samples and distributed an average of 14 payloads per victim, operating a pay-per-install model that monetized compromi...
Mistic is a stealthy backdoor malware linked to the Woodgnat initial access broker, active since April 2026. It uses sideloading of legitimate Microsoft files to execute payloads in memory without disk writes, enhancing stealth. Mistic includes typical backdoor functions and a self-delete kill switch. It has been observed deployed alongside ModeloRAT, another tool associated with Woodgnat. Targeting is opportunistic across sectors such as insurance, education, IT, and professional services. Woodgnat sells persistent remote access to ransomware affiliates involved with multiple ransomware families. The threat leverages social engineering lures delivered via compromised WordPress sites.
Infostealers remain among the most pervasive cybercrime threats, silently harvesting passwords, cookies, and session tokens that enable enterprise breaches. StealC is a malware-as-a-service infostealer written in C++ that collects credentials from browsers, cryptocurrency wallets, messaging applications, email clients, and gaming platforms while functioning as a secondary loader. Amadey operates as a modular backdoor loader active since 2018, delivering downstream payloads including StealC, Lumma Stealer, and ransomware through various backdoor commands. Both operate on commodity rental models where stolen credentials flow through underground markets to access brokers who resell enterprise access. On June 24, 2026, Microsoft's Digital Crimes Unit coordinated with Europol to disrupt over 200 malicious command-and-control domains supporting these operations, using AI-assisted analysis tools including Microsoft Copilot for binary analysis and configuration extraction.
A newly identified threat group, designated as GhostShell, has been conducting cyber operations against Ukraine's unmanned aerial vehicle supply chain since February 2026. The attackers employ malicious archives containing decoy documents that impersonate Besomar, a Ukrainian manufacturer of high-precision interceptor drones, to compromise defense and procurement networks. The attack chain deploys three distinct payloads: a custom backdoor (122.exe) utilizing mTLS client certificates for screen capture and command execution, an in-memory stager (update.exe) disguised as a Windows Health Service that fetches next-stage payloads via Telegram, and a proxy launcher (22.exe) that tunnels traffic through Xray Core to deploy the Vidar v2 information stealer. The targeting strongly suggests a Russian cyber operation, though analysts employ the SOLBIT framework to avoid attribution based on easily forgeable indicators.
Between February and May 2026, researchers identified five malicious skills on ClawHub, OpenClaw's AI agent marketplace, that evaded detection by VirusTotal and ClawScan. The threats included two macOS infostealers communicating with command-and-control infrastructure, one skill using file padding to bypass scanner thresholds, and two novel agentic threats exploiting the AI supply chain for financial gain. The infostealers delivered payloads including AMOS malware through Base64-encoded droppers and paste-site redirects. One skill implemented runtime affiliate injection by forcing agents to recommend products through malicious referral links, while another orchestrated a front-running scheme using coordinated AI agents to manipulate cryptocurrency token launches. These attacks demonstrate how malicious actors exploit semantic instruction hijacking and the lack of isolation between skill logic and agent authority to compromise AI agent ecosystems.
A sophisticated Rust-based macOS implant named macOS.Gaslight has been discovered, featuring a novel 3.5 KB prompt-injection payload containing 38 fabricated system messages designed to disrupt LLM-assisted malware analysis. The backdoor communicates via Telegram Bot API with AES-GCM encrypted payloads over certificate-pinned TLS and includes self-redaction capabilities to hide its bot token from logs. It provides operators with an interactive shell, system information collection, and credential stealing capabilities through a bundled Python script that targets browser data, keychains, and command histories. The implant uses runtime-fetched CPython interpreters and establishes persistence through a LaunchAgent masquerading as an Apple system service. This threat is assessed with high confidence to be aligned with DPRK activity and represents a significant evolution in adversarial techniques targeting security analysts rather than sandbox environments.
Recent activity has been detected linked to the Sidewinder advanced persistent threat group. The campaign utilizes a malicious document named No.9374.docx with the hash value 64f2681ad0940e6c2c9c76e6834117bf as a lure mechanism. The infrastructure supporting command and control operations includes the domain update[.]ms-office[.]app. This observation indicates ongoing operations by Sidewinder, a threat actor known for targeting specific regions and sectors. The use of weaponized documents and deceptive domains mimicking legitimate Microsoft services demonstrates continued sophisticated social engineering tactics employed by this group.
EvilTokens is a sophisticated phishing kit that conceals critical components of its attack through browser-side AES-GCM encryption, creating visibility gaps for traditional static URL analysis. The kit exploits Microsoft's legitimate device login flow through OAuth device-code phishing to gain account access without directly stealing passwords. Targeting organizations primarily in the United States and Europe, EvilTokens focuses on managed security services, technology, manufacturing, education, banking, and consulting sectors. The encrypted landing page only reveals its malicious content after browser decryption, requiring dynamic analysis to uncover the complete attack chain. The kit uses multiple stages including gate checks, user code requests, and session monitoring to complete Microsoft 365 account takeovers while appearing legitimate through final redirects to OneDrive.
A sophisticated phishing campaign was identified distributing multiple malware families through a multi-stage loader utilizing steganography and fileless techniques. The infection chain begins with archive attachments containing files disguised as financial documents, primarily targeting Indian organizations using names related to GST, NEFT, RTGS, and IMPS transactions. The loader employs in-memory execution to avoid disk-based artifacts and uses embedded .NET Bitmap objects to conceal payloads. Various malware families have been deployed including Remcos RAT, Agent Tesla, MassLogger, Phantom Stealer, Dark Cloud, Red Line Stealer, Snake keyloggers, Formbook, and xworm. The final payloads establish persistence through registry Run keys, perform process hollowing, steal browser credentials, record audio and webcam, and exfiltrate data to command-and-control infrastructure. The campaign exhibits characteristics of a loader-as-a-service operation serving multiple threat actors globally.
A sophisticated supply chain attack leverages typosquatting of the legitimate postcss-selector-parser npm package, which receives over 150 million weekly downloads. Three malicious packages published by user 'abdrizak' masquerade as PostCSS utilities while delivering a multi-stage Windows RAT. The infection chain begins with encoded JavaScript that drops PowerShell scripts, which then download a bundled Python runtime containing Nuitka-compiled modules. The final payload implements comprehensive RAT capabilities including HTTP C2 communication with RC4 encryption, registry persistence, VM detection, remote shell execution, file transfer, and Chrome credential theft using DPAPI and app-bound decryption. The attack demonstrates how build tooling dependencies can serve as delivery mechanisms for sophisticated Windows malware targeting developer environments.
An initial access broker linked to Payouts King ransomware is deploying Edgecution, a sophisticated malware utilizing a malicious Microsoft Edge browser extension. The attack begins through social engineering via Microsoft Teams, impersonating IT staff and directing victims to fake Microsoft websites offering supposed Outlook updates. Edgecution comprises two components: a browser extension that communicates with command-and-control servers via websockets, and a Python-based backdoor. The extension abuses Chrome native messaging protocol to escape browser sandbox restrictions, enabling direct host access. This allows attackers to manipulate the filesystem, launch processes, and execute arbitrary code. The malware operates in a headless browser, remaining invisible to users. Deployment methods include AutoHotKey scripts, Windows batch scripts, and PowerShell scripts. The Python backdoor supports various commands including system information collection, filesystem access, and arbitrary code execution.
LastPass experienced a security incident through Klue, a third-party market intelligence platform integrated with its Salesforce and Gong systems. On June 12, 2026, LastPass was notified that an unauthorized actor exploited stolen OAuth tokens held by Klue to access customer relationship management data within LastPass's Salesforce environment. The exposed information includes customer names, email addresses, phone numbers, physical addresses, support case data, and sales records. Multiple Klue customers were affected by this supply chain attack. LastPass confirmed no Gong data was accessed, and customer vaults, master passwords, and encrypted vault data remain unaffected. The company has terminated Klue access, rotated compromised API tokens, and is cooperating with law enforcement while warning customers about potential phishing attempts using the exposed contact information.
A malicious npm package named 'node-fetch-utils' was discovered masquerading as a legitimate fetch helper utility. The package declares a remote tarball dependency from GitHub that executes upon installation. It runs an obfuscated postinstall script targeting Windows systems, which downloads a bundled Python runtime and drops it as Microsoft\EdgeBroker\pythonw.exe for persistence. The dropper then uses this disguised runtime to execute a fileless Python implant decrypted in memory and launched hidden via wscript. The dropper scripts self-delete while the disguised runtime remains active on the compromised system, establishing command and control communications.
A sophisticated phishing campaign leverages evolved ClickFix techniques to bypass modern endpoint security through victim-assisted execution. Targets receive emails with urgent OneDrive document lures containing malicious ZIP attachments. The attack uses LNK shortcuts that redirect victims to landing pages, silently injecting PowerShell commands into their clipboard. Through social engineering, victims are tricked into manually executing commands via Win+R, circumventing traditional security filters. The campaign employs DNS TXT records for payload staging, avoiding HTTP detection. The threat infrastructure hosts multiple malicious components including obfuscated scripts, fake MSI installers masquerading as legitimate software like ConnectWise, and ISO images with spyware for persistent access. This represents a shift toward long-game tactics focused on establishing full post-compromise environmental control.
