A sophisticated phishing campaign targets Colombian users by impersonating the Attorney General's Office with judicial notification lures. The attack uses a multi-stage infection chain starting with a malicious . SVG file attachment that triggers HTA, VBS, and PowerShell scripts, ultimately injecting the AsyncRAT malware into MSBuild.exe. AsyncRAT establishes command and control (C2) communications, steals data, and can dynamically load plugins. The campaign employs anti-virtual machine (VM) techniques, persistence mechanisms, and heavy obfuscation to evade detection. Although primarily focused on Colombia, the advanced tactics and malware capabilities pose risks to any organization exposed to similar phishing vectors. The threat demonstrates extensive use of MITRE ATT&CK techniques, including execution, persistence, defense evasion, credential access, and command and control. No known exploits or CVEs are associated, and the severity is assessed as medium based on current information.
Cavalry Werewolf, a malicious actor group, targeted Russian state agencies and enterprises in the energy, mining, and manufacturing sectors from May to August 2025. The attackers used targeted phishing emails, posing as Kyrgyz government officials, to gain initial access. They employed custom malware, including FoalShell reverse shells and StallionRAT, controlled via Telegram. The group impersonated or compromised real email accounts from Kyrgyz agencies. Their arsenal includes various versions of FoalShell (Go, C++, C#) and StallionRAT (Go, PowerShell, Python). The attackers executed commands for system reconnaissance, file uploads, and SOCKS5 proxying. Evidence suggests potential expansion to targets in Tajikistan and Middle Eastern countries.
Insikt Group has identified five distinct activity clusters linked to TAG-144 (Blind Eagle), targeting primarily Colombian government entities across local, municipal, and federal levels throughout 2024 and 2025. The clusters share similar tactics, techniques, and procedures (TTPs) such as using open-source and cracked remote access trojans (RATs), dynamic domain providers, and legitimate internet services (LIS) for staging. However, they differ in infrastructure, malware deployment, and operational methods. The group maintains an extensive operational infrastructure, employs various RATs, and uses multi-stage infection chains. TAG-144's primary focus appears to be credential theft and espionage, with evidence linking it to Red Akodon and compromised Colombian government email accounts used in spearphishing campaigns.
A Malware-as-a-Service operation utilizing Amadey for payload delivery has been identified, with connections to a SmokeLoader phishing campaign targeting Ukrainian entities. The operation exploits fake GitHub accounts to host payloads and tools, bypassing web filtering. Emmenhtal, a multistage downloader, is used to download Amadey and other malware. The activity involves various malware families and GitHub repositories for staging custom payloads. Similarities in tactics and indicators between the SmokeLoader campaign and Amadey MaaS activity have been observed. The operation demonstrates adaptability in delivering diverse tooling, including legitimate software like PuTTY. The threat actors employ sophisticated obfuscation techniques and leverage public platforms for malware distribution.
AsyncRAT, an open-source remote access trojan, has spawned numerous forks since its 2019 release, becoming a cornerstone of modern malware. This analysis maps out the relationships among AsyncRAT variants, focusing on prominent forks like DcRat and VenomRAT, as well as lesser-known versions. The research explores the evolution of these forks, their unique features, and the methods used to identify them. It also delves into exotic variants with specialized plugins, such as NonEuclid RAT's jump scare and malware spreader functionalities. The proliferation of AsyncRAT forks highlights the risks associated with open-source malware frameworks and the need for proactive detection strategies.
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.
The SERPENTINE#CLOUD campaign leverages Cloudflare Tunnels and Python-based loaders to deliver memory-injected payloads through a chain of shortcut files and obfuscated scripts. The attack begins with malicious .lnk files disguised as documents, fetching remote code from Cloudflare subdomains. The infection chain involves batch, VBScript, and Python stages, ultimately deploying shellcode that loads a Donut-packed PE payload. The campaign focuses on Western targets, using Cloudflare for payload hosting and anonymity. It demonstrates evolving tactics, shifting from simple .url files to sophisticated .lnk payloads. The final stage involves a RAT payload, giving attackers full control over infected hosts.
A wide-ranging phishing campaign has been identified that enables threat actors to bypass traditional security controls and delay detection. The campaign, tracked since 2024, has facilitated remote surveillance, credential theft, lateral movement, data exfiltration, and ransomware across numerous organizations. The likely new or rebranded cybercriminal group behind this campaign uses legitimate services like TryCloudflare to host and deliver highly evasive malware such as AsyncRAT and other Remote Access Trojans. This malware allows threat actors to remotely control infected networks throughout the full attack lifecycle. The campaign targets organizations globally across multiple sectors without industry preference, using widely available malware and difficult-to-detect techniques involving Python scripts, obfuscated batch scripts, trusted cloud services, and dynamic infrastructure.
A fileless AsyncRAT campaign is targeting German-speaking users through Clickfix-themed websites. The attack uses a fake 'I'm not a robot' prompt to execute malicious PowerShell code, which downloads and runs obfuscated C# code in memory. This technique enables full remote access, credential theft, and data exfiltration without leaving traces on the disk. The malware establishes persistence via registry keys and communicates with a command and control server on port 4444. The campaign has been active since at least April 2025, primarily affecting German-speaking regions. Mitigation strategies include blocking suspicious PowerShell activity, monitoring registry changes, and implementing in-memory scanning for threats.
Check Point Research uncovered a malware campaign exploiting expired Discord invite links to redirect users to malicious servers. The attackers use a combination of techniques including ClickFix phishing, multi-stage loaders, and time-based evasions to deliver AsyncRAT and a customized Skuld Stealer targeting crypto wallets. The campaign leverages trusted cloud services for payload delivery and data exfiltration to avoid detection. The operation continues to evolve, with threat actors now able to bypass Chrome's App Bound Encryption using adapted tools like ChromeKatz to steal cookies from new Chromium browser versions. The campaign highlights how subtle features in Discord's invite system can be exploited as attack vectors.
Censys researchers uncovered a spear‑phishing campaign where threat actors leveraged a cluster of 16 open directories hosting heavily obfuscated Visual Basic Script (VBS) files. The study analyzes how attackers set up these public-accessible directories to store malicious scripts, the obfuscation techniques employed, and the infrastructure's lifecycle.
A sophisticated malware campaign has been discovered utilizing paste.ee to distribute XWorm and AsyncRAT. The attackers employ obfuscated JavaScript with Unicode characters to download and execute malicious code from paste.ee URLs. The infrastructure includes multiple C2 servers across Europe and the US, using specific ports and SSL certificates. XWorm, a stealthy RAT, captures keystrokes, exfiltrates data, and maintains persistent remote access. AsyncRAT, an open-source trojan, is also part of the campaign. The attackers use a network of IP addresses and domains, with some hosted by QuadraNet Enterprises LLC and dataforest GmbH. Defenders are advised to block identified domains, monitor suspicious connections, and update security software to detect unusual behavior.
This investigation uncovered a large-scale campaign involving backdoored GitHub repositories targeting game cheaters and inexperienced cybercriminals. The threat actor, possibly linked to a Distribution-as-a-Service operation, uses multiple types of backdoors and a convoluted infection chain leading to RATs and infostealers. The campaign involves automated commits, obfuscation techniques, and complex payloads. Researchers found over 100 malicious repositories with distinct contributor roles, suggesting an automated framework. The eventual payload includes AsyncRAT, Remcos, and Lumma Stealer. The threat actor uses Telegram for notifications and various paste sites for hosting malicious code. This case highlights the complexity of modern cyber threats and the importance of cautious approaches to open-source repositories.
Cybercriminals have launched a campaign redirecting users from gaming sites and social media to fake Booking.com websites. The scam uses fake CAPTCHA prompts to trick visitors into executing malicious commands on their devices. If successful, the attack downloads and installs AsyncRAT, a backdoor Trojan that allows remote monitoring and control of infected computers. The campaign, which began in mid-May, frequently changes its final redirect destination. The malicious actors exploit the fact that 40% of people book travel through online searches, creating ample opportunities for deception. To stay safe, users are advised to be cautious of website instructions, use anti-malware solutions, employ browser extensions that block malicious domains, and consider disabling JavaScript on unknown websites.
AsyncRAT, a remote access trojan known since 2019, has been rewritten in Rust, marking a shift from its original C# implementation. This change aims to complicate reverse engineering efforts due to limited analysis tool support for Rust. The malware retains its core functionality, including plugin installation, code execution, and persistence. It installs via scheduled tasks or temporary directory copying, stores plugins in the registry, and communicates with command and control servers over TLS. The Rust variant supports fewer commands compared to its .NET counterpart, suggesting ongoing development. The malware collects system information, including hardware ID, OS details, and antivirus software presence. Debug strings in the samples indicate active development of this Rust version.
MintsLoader, a malicious loader first observed in 2024, is employed in phishing and drive-by download campaigns to deploy payloads like GhostWeaver, StealC, and modified BOINC clients. It uses obfuscated JavaScript and PowerShell scripts in a multi-stage infection chain, featuring sandbox evasion techniques, a domain generation algorithm, and HTTP-based C2 communications. Various threat groups, including TAG-124 and SocGholish operators, utilize MintsLoader to target industrial, legal, and energy sectors. The loader's sophisticated obfuscation and evasion methods complicate detection, but Recorded Future's Malware Intelligence Hunting provides up-to-date information on new samples and C2 domains.
