All news with #infostealer tag

🛡️ Researchers have uncovered a new macOS information stealer, MacSync, delivered as a code-signed and notarized Swift installer masquerading as a messaging app. The signed DMG bypasses Gatekeeper and XProtect, and the installer prompts users to right-click to run — a common social-engineering tactic. Apple has revoked the signing certificate. The dropper enforces rate limits, removes quarantine attributes, and downloads a Base64-encoded payload that resolves to the rebranded Mac.c/MacSync strain.

🚨 Jamf Threat Labs uncovered a reworked macOS infostealer masquerading as a legitimate signed app. The Swift dropper is code‑signed and notarized, delivered in a 25.5MB disk image posing as a messaging installer, and silently fetches and executes an encoded script through a helper. It runs mainly in memory, removes quarantine attributes, enforces a ~3600s delay before execution, and cleans up traces; Jamf reported the developer certificate and Apple revoked it.

⚠️ Researchers at Jamf report that MacSync Stealer now arrives as a code-signed, notarized Swift utility that can execute with minimal user interaction. The dropper fetches a payload script from a command-and-control server after installation. Because the app appears signed and notarized, Gatekeeper does not display extra warnings, allowing attackers to exploit a window before certificate revocation. This behavior highlights limitations in Apple’s automated notarization checks.

⚠️ Security researchers discovered two malicious Google Chrome extensions named Phantom Shuttle that intercept and exfiltrate credentials and session data from more than 170 targeted domains. After users pay for a subscription the add-ons enable a proxy 'smarty' mode, inject hard-coded proxy credentials, and route selected traffic through attacker-controlled proxies to establish a persistent Man‑in‑the‑Middle position. A recurring heartbeat to a command-and-control server forwards VIP emails, plaintext passwords and version details, enabling continuous monitoring and credential theft.

🔐 Security researchers uncovered 'lotusbail,' a malicious npm package that impersonates the legitimate @whiskeysockets/baileys WhatsApp Web client while quietly exfiltrating messages, credentials, and contact data from developer environments. The trojanized wrapper amassed over 56,000 downloads and operated for roughly six months before Koi Security flagged its behavior. Stolen information was encrypted and layered with multiple obfuscation techniques, and the malware leveraged WhatsApp multi-device pairing to keep an attacker device linked even after the package was removed.

🛡️ Jamf researchers found a new MacSync variant delivered as a code-signed, notarized Swift application inside a disk image named zk-call-messenger-installer-3.9.2-lts.dmg, enabling it to bypass macOS Gatekeeper checks without any direct Terminal interaction. The Mach-O binary carried a valid signature tied to Developer Team ID GNJLS3UYZ4, which Apple revoked after a report. The dropper decodes an encoded payload on disk and the stealer uses multiple evasions — inflating the DMG with decoy PDFs, wiping execution scripts, and performing internet checks to avoid sandboxed analysis — before harvesting credentials, browser data, iCloud keychain items, cryptocurrency wallet data, and files.

🔒 Koi Security disclosed a malicious npm package, lotusbail, masquerading as a WhatsApp API and designed to intercept authentication tokens, messages, contacts and media. Uploaded in May 2025 by the account "seiren_primrose", it has been downloaded over 56,000 times and remained available at the time of reporting. The library wraps the WebSocket client and contains a hard-coded pairing code that links the attacker's device to a victim's WhatsApp account, creating a persistent backdoor even after uninstallation. It also implements anti-debugging traps to freeze execution and hinder analysis.

🔒 A malicious NPM package published as lotusbail and masquerading as a WhatsApp Web API library was found to exfiltrate authentication tokens, session keys, messages, contacts and media. Researchers at Koi Security report the package wraps the legitimate WebSocket client from the Baileys project so all traffic is intercepted and recorded. The malware encrypts captured data with layered obfuscation (Unicode tricks, LZString, AES and custom RSA) and establishes persistent access by pairing the attacker’s device to victims' WhatsApp accounts. Developers should remove the package, inspect linked devices, and monitor runtime behavior for unexpected outbound connections.

📱 Group-IB reports that adversaries are increasingly using innocuous-looking dropper APKs to deploy the Android SMS stealer Wonderland, enabling bidirectional C2, USSD execution, and OTP interception. Operators tracked as TrickyWonders coordinate via Telegram, abusing stolen sessions and using fake Google Play pages, Facebook ads, dating apps, and messaging platforms to distribute per-build, heavily obfuscated malware. The move to droppers and rapid domain rotation improves stealth and resilience, amplifying financial theft.

🛡️ Kaspersky researchers uncovered a new Windows infostealer named Stealka in November 2025 that steals browser data, extension files and application settings to enable account takeover, cryptocurrency theft and deployment of a cryptominer. The malware is most often distributed as game cracks, cheats and pirated software hosted on legitimate platforms; activation requires the victim to run the delivered file. Stealka specifically targets Chromium- and Gecko-based browsers and dozens of popular wallet, password manager and 2FA extensions. Users are advised to rely on reputable endpoint protection, avoid pirated software and keep secrets out of browser storage.

🛡️ Darktrace links a newly observed, heavily obfuscated BeaverTail JavaScript variant to DPRK-associated Lazarus clusters, targeting cryptocurrency traders, developers and retail staff. The cross-platform loader and stealer harvests host details and retrieves follow-on payloads, with recent samples using layered Base64 and XOR encoding. Delivery has expanded via trojanized npm packages, fake interview platforms and command-injection lures.

🔒 A malicious NuGet package named "Tracer.Fody.NLog" was published on February 26, 2020 and impersonates the legitimate Tracer.Fody maintainer to deliver a cryptocurrency wallet stealer. The embedded Tracer.Fody.dll scans the default Stratis wallet directory (%APPDATA%\StratisNode\stratis\StratisMain), reads *.wallet.json files and in-memory passwords, and exfiltrates data to 176.113.82[.]163. Socket researcher Kirill Boychenko highlighted multiple evasion tactics — a typosquatted publisher name, Cyrillic lookalikes in code, and a hidden routine inside a helper method that runs during normal execution while suppressing exceptions.

⚠️ Security researchers found that Urban VPN Proxy, a free browser extension with millions of installs, injected hidden scripts to capture full AI chat conversations from users’ browsers. The extension targeted multiple platforms including ChatGPT, Claude, Gemini and Perplexity, overriding browser network APIs to intercept prompts and responses. Captured data was packaged and sent to the extension operator’s backend even when VPN features were disabled. The extension marketed an “AI protection” feature that did not prevent this collection.

⚠️Rapid7 researchers report a new malware-as-a-service called SantaStealer, advertised on Telegram and hacker forums as an in-memory info‑stealer designed to evade file-based detection. The operation appears to be a rebranding of BluelineStealer by a Russian-speaking developer and is being marketed with Basic ($175/month) and Premium ($300/month) tiers. Samples and an affiliate panel show 14 modular data-collection threads that harvest browser credentials, cookies, saved cards, messaging and gaming app data, crypto wallets and documents, bundle results into ZIPs in memory, and exfiltrate them in 10MB chunks to a hardcoded C2 on port 6767. Despite claims of stealth, leaked builds include symbol names and unencrypted strings that make analysis straightforward.

📧 Seqrite Labs has uncovered a Russian-origin phishing campaign, tracked as Operation MoneyMount-ISO, that delivers the Phantom information stealer through a multi-stage attachment chain. Attackers distribute a ZIP containing an ISO that auto-mounts and displays a disguised executable; running it triggers a loader that decrypts a malicious DLL and injects the stealer into memory while performing extensive anti-analysis checks. The campaign targets Russian-speaking finance, procurement and HR roles, harvesting passwords, cookies, crypto wallets, keystrokes and Discord tokens, then exfiltrating data via Telegram bots, Discord webhooks and FTP.

🛡️ Cybersecurity researchers have disclosed Operation MoneyMount-ISO, a phishing campaign that delivers Phantom Stealer via malicious ISO images attached inside ZIP archives targeting Russian finance, accounting, procurement, legal and payroll teams. The ISO, labeled as a bank transfer confirmation, mounts as a virtual CD and executes an embedded DLL named CreativeAI.dll to launch the stealer. Phantom harvests browser-stored crypto wallets, Discord tokens, passwords, cookies, credit cards, and can log keystrokes and monitor the clipboard. Stolen data is exfiltrated over Telegram, Discord webhooks or FTP.

🔍 ReversingLabs uncovered a campaign that embedded malware in 19 Visual Studio Code extensions by tampering with bundled dependencies. Attackers replaced the widely used npm package path-is-absolute to execute a JavaScript dropper from a file named "lock" and hid two binaries inside an archive disguised as banner.png. The payloads were launched via cmstp.exe, including a process-terminating component and a Rust-based Trojan; Microsoft has been notified.

⚠️ Security researchers warn of a macOS infostealer campaign that uses Google search ads to push users toward publicly shared ChatGPT and Grok conversations containing malicious installation instructions. According to Kaspersky and Huntress, the ClickFix attack spoofs troubleshooting guides and decodes a base64 payload into a bash script that prompts for a password, then uses it to install the AMOS infostealer with root privileges. Users are urged not to execute commands copied from online chats and to verify safety first.

⚠️ Researchers observed threat actors distributing the StealC V2 infostealer hidden inside free .blend files on marketplaces like CGTrader. When Blender’s Auto Run Python Scripts setting is enabled, opening these models executes embedded Python that fetches a loader via Cloudflare Workers and runs a PowerShell chain to deploy payloads. The campaign exfiltrated browser and wallet data and abused a UAC bypass. Disable autorun and restrict unvetted tools.

🛡️ Researchers from Koi Security have uncovered two malicious Visual Studio Code extensions, Bitcoin Black and Codo AI, that delivered a DLL-based infostealer via a disguised Lightshot executable. The campaign used social engineering and evolving technical methods—initially complex PowerShell and passworded ZIPs, later streamlined to hidden batch scripts—to harvest screenshots, clipboard data, Wi‑Fi credentials and browser sessions. One extension posed as a theme while the other offered legitimate AI coding features, helping both evade suspicion on the VS Code Marketplace.