The Efimer Trojan is spreading through compromised WordPress sites, malicious torrents, and email campaigns impersonating lawyers. It steals cryptocurrency by replacing wallet addresses in the clipboard and can execute additional malicious scripts. The Trojan communicates with its command-and-control server via the Tor network. It has additional capabilities to brute-force WordPress sites and harvest email addresses for further distribution. The malware primarily targeted users in Brazil, India, Spain, Russia, Italy, and Germany between October 2024 and July 2025, affecting over 5,000 Kaspersky users.
A large-scale Malware-as-a-Service operation, orchestrated by Chinese-speaking threat actors, has infected over 11,000 Android devices globally with the PlayPraetor Remote Access Trojan. The campaign primarily targets Europe, with significant presence in Portugal, Spain, and France, but also affects Africa, Latin America, and Asia. The botnet is expanding rapidly, with over 2,000 new infections weekly, focusing on Spanish and French speakers. The operation is managed through a sophisticated Chinese-language Command and Control panel, supporting multiple affiliates. PlayPraetor abuses Android's Accessibility Services to gain real-time control over compromised devices, targeting nearly 200 banking apps and cryptocurrency wallets worldwide.
A series of cryptocurrency scams have been uncovered where threat actors distribute malicious smart contracts disguised as trading bots to drain user wallets. The campaign has stolen over $900,000 US and employs multiple obfuscation techniques to conceal the attacker's wallet address. Leveraging aged YouTube accounts and curated comment sections, the scams create a false sense of legitimacy. The smart contracts, written in Solidity, use various methods to hide the attacker's Externally Owned Account. Distribution occurs through YouTube videos explaining the contracts as trading arbitrage bots, with some videos showing signs of being AI-generated. The most successful scam yielded approximately $902,000 US from a single attacker address.
A sophisticated malware campaign called JSCEAL is targeting cryptocurrency users through fake apps impersonating popular trading platforms. The attackers use malicious ads to lure victims into downloading installers that deploy a multi-stage infection chain. This includes PowerShell scripts for profiling and a final payload of compiled JavaScript (JSC) files executed via Node.js. The JSCEAL malware steals crypto-related data and credentials while employing advanced evasion techniques. The campaign has potentially reached millions of users across multiple countries, primarily targeting the cryptocurrency and financial sectors.
This report details an ongoing campaign by a threat actor operating during Chinese time zone hours, targeting Chinese-speaking individuals and entities globally. Since June 2023, the actor has created over 2,800 domains for malware delivery, primarily targeting Windows systems through fake application download sites and update prompts. The actor has made operational changes, including anti-automation measures, reduced site tracker services, increased server distribution, and more discreet registration details. The campaign uses fake login pages, marketing apps, and cryptocurrency-related apps to distribute malware. The actor's motivations appear to be financially driven, potentially including credential theft, financial theft, and access brokering. The report emphasizes the importance of user awareness, enhanced security measures, and multi-layered defense strategies to counter this persistent threat.
Katz Stealer is a sophisticated infostealer marketed as Malware-as-a-Service (MaaS), launched in early 2025. It features robust credential and data theft capabilities, along with modern evasion and anti-analysis techniques. The stealer targets a wide range of personal and sensitive information, including passwords, cryptocurrency keys, and browser session data. Operated through a web-based management panel, Katz Stealer allows affiliates to generate custom payloads and manage stolen data. Its infection chain involves obfuscated JavaScript droppers, steganography, and process hollowing techniques. The malware focuses heavily on browser data theft and cryptocurrency wallet targeting, with the ability to bypass some browser security measures.
A new variant of the Odyssey infostealer for macOS has been discovered, featuring code signing, notarization, and a persistent backdoor. The malware mimics a Google Meet updater and uses a SwiftUI-based 'Technician Panel' for social engineering. It steals sensitive data, including passwords, browser information, and cryptocurrency wallet contents. The stealer now includes a second-stage payload that establishes persistence and communicates with a command-and-control server. Notable features include dynamic command execution, network tunneling capabilities, and self-termination mechanisms. The malware also employs anti-analysis techniques to evade researchers. Multiple signed and notarized samples have been identified in the wild, indicating an evolution in the threat actor's tactics.
An ongoing social engineering campaign is targeting cryptocurrency users through fake startup companies impersonating AI, gaming, and Web3 firms. The scammers create elaborate facades using spoofed social media accounts and project documentation on platforms like Notion and GitHub. They contact victims offering to pay them to test software, which is actually malware designed to steal crypto wallet contents. The campaign uses both Windows and macOS malware, including information stealers like Atomic Stealer. The threat actors go to great lengths to appear legitimate, even creating fake conference photos and merchandise stores. Multiple fake company identities have been identified as part of this campaign.
A blockchain developer in Russia lost $500,000 in crypto assets due to a malicious Solidity Language extension for Cursor AI IDE. The fake extension, downloaded 54,000 times, appeared higher in search results than the legitimate one due to ranking algorithms. It installed malware that allowed remote access and data theft. The attackers used ScreenConnect for remote control and deployed various scripts to steal wallet passphrases. A new malicious package was published shortly after the first was removed, with an inflated download count of 2 million. Similar attacks were found targeting blockchain developers through other extensions and npm packages. The incident highlights the ongoing threat of malicious open-source packages in the crypto industry.
Atomic macOS Stealer (AMOS) has received a major update, now including an embedded backdoor for persistent access to victims' Macs. This upgrade allows attackers to maintain control, run remote tasks, and potentially gain full system compromise. The Russia-affiliated AMOS threat group has expanded its capabilities, mimicking North Korean attack strategies. The malware is distributed through fake software websites and spear-phishing campaigns. It uses a trojanized DMG file to bypass Gatekeeper, installs persistence via LaunchDaemon, and communicates with command-and-control servers. The backdoor functionality significantly increases the risk to victims, turning one-time breaches into long-term compromises. AMOS campaigns have already affected over 120 countries, with the potential to access thousands of Mac devices worldwide.
DPRK threat actors are targeting Web3 and crypto-related businesses using Nim-compiled binaries and multiple attack chains. The malware, dubbed NimDoor, employs unusual techniques for macOS, including process injection and encrypted WebSocket communications. It uses a novel persistence mechanism leveraging signal handlers and deploys AppleScripts as beacons and backdoors. The attack chain begins with social engineering via Telegram, leading to the execution of malicious scripts and binaries. The malware exfiltrates browser data, Keychain credentials, and Telegram user information. The use of Nim introduces new levels of complexity for analysts, blending complex behavior into binaries with less obvious control flow.
A new spyware campaign dubbed SparkKitty has been discovered targeting both iOS and Android devices. The malware, believed to be connected to the previously identified SparkCat campaign, is distributed through official app stores and unofficial sources. It primarily steals photos from infected devices, likely searching for cryptocurrency wallet information. The campaign has been active since at least February 2024 and mainly targets users in Southeast Asia and China. The malware is embedded in various apps, including modified versions of popular applications like TikTok, and uses different techniques to evade detection. The researchers identified multiple variations of the malware, including obfuscated libraries and malicious frameworks mimicking legitimate ones.
Cybercriminals are exploiting Discord's invite system and content delivery features to distribute malware and steal sensitive data. They use fake invite links, expired codes, and vanity URLs to redirect users to malicious servers. The attack chain involves a sophisticated combination of social engineering, multi-stage loaders, and time-based evasion tactics. Victims are tricked into authorizing a fake bot, which leads to the deployment of AsyncRAT and a customized Skuld Stealer. These malware variants target browser credentials, Discord tokens, and cryptocurrency wallets. The campaign uses trusted platforms like GitHub and Bitbucket to host encrypted payloads, and employs advanced techniques to bypass security measures and maintain persistence.
An investigation uncovered more than 20 cryptocurrency phishing applications on the Google Play Store impersonating legitimate wallets like SushiSwap and PancakeSwap. These malicious apps employ phishing techniques to steal users' mnemonic phrases, allowing access to real wallets and theft of funds. The apps share common patterns, including embedded C&C URLs in privacy policies and similar package names. They are distributed through compromised developer accounts previously used for legitimate apps. Two main types were identified: those using the Median framework and those directly loading phishing URLs into WebViews. The campaign demonstrates a coordinated operation with a large-scale phishing infrastructure linked to over 50 domains.
An AMOS malware campaign has been discovered utilizing GitHub repositories to distribute malicious files. The attackers created a fake Ledger Live app that prompts users to enter their secret phrases, which are then exfiltrated. The malware uses obfuscation techniques, including base64 encoding and custom XOR operations. The campaign targets cryptocurrency users, specifically those using hardware wallets. The malware is distributed through DMG files and ZIP archives, containing both x64 and ARM64 versions of AMOS. The attackers use multiple domains for command and control, and the malware performs checks to detect virtual environments.
A detailed analysis of a sophisticated intrusion targeting a cryptocurrency foundation employee is presented. The attack, attributed to the North Korean APT group BlueNoroff, began with a social engineering lure via Telegram, leading to the installation of malicious software disguised as a Zoom extension. The intrusion involved multiple stages of malware deployment, including persistent implants, backdoors, keyloggers, and cryptocurrency stealers. The attackers utilized advanced techniques such as process injection on macOS and leveraged various tools to collect sensitive information, particularly focusing on cryptocurrency-related data. The analysis covers the initial access vector, technical details of the malware components, and their functionalities, providing insights into the evolving tactics of state-sponsored threat actors targeting macOS systems.
In May 2025, Cisco Talos identified a Python-based remote access trojan (RAT) called 'PylangGhost', used by a North Korean-aligned threat actor. PylangGhost shares similarities with the previously documented GolangGhost RAT. The threat actor, Famous Chollima, has been targeting employees with experience in cryptocurrency and blockchain technologies through fake job interview sites. The attacks primarily affect users in India. The malware is deployed through a two-stage process involving fake skill-testing pages and malicious command execution. PylangGhost consists of six Python modules and offers functionalities similar to its Golang counterpart, including system information collection, file manipulation, and browser data theft from over 80 extensions.
A new Android banking Trojan, Crocodilus, has rapidly evolved since its discovery in March 2025. Initially targeting Turkey, it has expanded to European countries and South America. The malware is distributed through malicious advertising on social networks, masquerading as banking and e-commerce apps. Recent developments include improved obfuscation techniques, the ability to add contacts to the victim's device, and an enhanced seed phrase collector for cryptocurrency wallets. Campaigns have been observed targeting users in Poland, Spain, and multiple global locations. The malware's sophistication and expanding reach indicate a well-organized threat actor, posing an increasing risk to users and organizations worldwide.
A novel Rust-based infostealer called EDDIESTEALER has been discovered, distributed through fake CAPTCHA campaigns. The malware uses deceptive verification pages to trick users into executing a malicious PowerShell script, which deploys the infostealer. EDDIESTEALER targets sensitive data including credentials, browser information, and cryptocurrency wallet details. It communicates with a command and control server to receive tasks and exfiltrate data. The malware employs string obfuscation, API obfuscation, and other evasion techniques. It specifically targets various crypto wallets, browsers, password managers, FTP clients, and messaging applications. The use of Rust in its development reflects a growing trend among threat actors seeking enhanced stealth and resilience against traditional analysis methods.
Katz Stealer is a sophisticated credential-stealing malware-as-a-service that targets multiple browsers, cryptocurrency wallets, and communication platforms. It employs advanced evasion techniques like geofencing, VM detection, and process hollowing. The infection chain involves obfuscated JavaScript, PowerShell scripts, and .NET payloads. Key features include browser credential theft, crypto wallet exfiltration, and Discord process hijacking. The malware also gathers system information, captures screenshots, and monitors clipboards. Detection opportunities include network traffic analysis, file system monitoring, and process behavior analysis. The analysis provides YARA and Sigma rules for detection, along with a comprehensive list of IOCs.
