All news in category “Incidents and Data Breaches”

🛡️ Check Point researchers uncovered an operation that clones open-source and freeware project pages to funnel users through a Traffic Distribution System (TDS) that can deliver malware like Remus Stealer, AnimateClipper, and the SessionGate framework. The deceptive sites preserve real links and use CloudFront-hosted JavaScript to convert clicks into a gated redirection chain enforcing anti-bot and VPN checks. The campaign has been active since late 2025 and escalated to malware distribution in January 2026.

📧 Symantec and Carbon Black disclosed that unknown attackers maintained quiet access to a senior executive's Outlook mailbox at a major global stock exchange for at least five months, repeatedly copying messages and routing them through Dropbox and OneDrive to blend with normal cloud activity. The intruders used a mailbox stealer built on Aspose, ran binaries impersonating legitimate updaters and OneDrive, and staged additional backdoors before access likely ended in March 2026. Indicators point to espionage-focused credential theft and tunneling tooling rather than a financially motivated campaign.

🔍 Proofpoint attributes a surge of financially motivated campaigns to TA4922, a Chinese-speaking cybercrime group now targeting organizations in Germany, Italy, the UK, and South Africa. The actor uses localized phishing lures and messaging apps to deliver a growing arsenal that includes the newly observed Atlas RAT, multiple custom loaders such as RomulusLoader and SilentRunLoader, and the ValleyRAT family. Researchers warn the toolset supports reconnaissance, credential theft, keylogging, audio/video capture, and plugin payloads, and note operational expansion and possible use of LLMs in development.

🔒 CISA and multiple US agencies warn that internet-exposed automatic tank gauge (ATG) systems used to monitor fuel and liquid storage tanks are being targeted by cyber actors. The advisory notes attackers exploit authentication bypasses, hardcoded credentials, command-execution flaws, SQL injection, and privilege-escalation vulnerabilities. If compromised, attackers can alter network and tank settings, disable alerts, and impair monitoring, increasing risk to safety and operations. Agencies recommend blocking public access, enforcing strong credentials and MFA, applying updates, and monitoring for unauthorized changes.

🛡️ A newly discovered DoS technique called HTTP/2 Bomb can bring down default HTTP/2 deployments of major servers (NGINX, Apache, IIS, Envoy, Cloudflare Pingora) from a single machine in seconds. Discovered with assistance from OpenAI's Codex and reported by Calif researchers, it combines HPACK compression amplification with flow-control stalling to force massive memory allocations and prevent their release. Proof-of-concept exploits exist and patches or mitigations are partially available.

🛡️ Huntress researchers disclosed a malspam campaign that abuses Google DoubleClick redirectors to funnel victims to personalized phishing landing pages and drop a .NET remote access trojan called DesckVB RAT. The attack starts with an HTML attachment that redirects through DoubleClick, decodes a Base64 email, and serves a ZIP containing a JavaScript loader which executes a PowerShell script to fetch a .NET loader. The loader disables security controls, establishes persistence, and injects the RAT via process hollowing into Microsoft-signed processes to evade detection.

🛡️ FortiGuard Labs details a new Gafgyt variant, C0XMO, which exploits CVE-2021-27137 in vulnerable DD-WRT firmware to gain remote control of devices. The malware separates scanning into a standalone Python scanner and distributes architecture-specific ELF payloads to multiple Linux platforms. C0XMO implements multi-stage persistence, kills competing botnets, supports extensive DDoS commands, and communicates with a C2 using a custom handshake. Organizations should update firmware, disable unnecessary remote services, and enforce strong credentials to mitigate risk.

🔎 European and international law enforcement agencies concluded a seven-month operation that dismantled nine organised crime groups and arrested 29 suspects tied to illegal streaming services. Coordinated by Bulgaria with Europol support and involving 13 countries, the action identified over 18,000 IPs, 4,370 piracy-linked domains, and removed more than 27,000 illegal streaming URLs. Authorities conducted 148 searches, referred 59 cases for prosecution, and continue work on dozens of related investigations.

🔒 Over May 6–7, 2026, Canvas LMS users encountered a defaced login page claiming a ShinyHunters extortion of Instructure, alleging theft of 3.65TB of data affecting about 275 million students, faculty, and staff across nearly 9,000 institutions. Instructure identified an exploited support-ticket vulnerability in its Free for Teacher environment and temporarily disabled that service while investigating. The incident disrupted finals and highlighted risks from centralized SaaS platforms, third-party dependencies, communications breakdowns and the evolving economics of extortion.

🛡️ A security researcher published exploit code for a Visual Studio Code zero-day that enables attackers to steal GitHub OAuth tokens by tricking users into clicking a link. The flaw abuses VS Code's sandboxed webview message-passing to run JavaScript that simulates keypresses, installs a malicious extension, and exfiltrates tokens sent to github.dev. The vulnerability is unpatched and unassigned a CVE; users can mitigate risk by clearing cookies and site data for github.dev to force reauthentication prompts.

🛡️ McAfee Labs reports a MaaS campaign called Weedhack that has been active since January 2026, using SEO poisoning and YouTube videos to trick Minecraft users into downloading malicious JAR files. The malware chain begins with a trojanized client and leverages the Ethereum blockchain for C2 resolution, ultimately delivering remote access and information-stealing payloads. The service is offered free and as a paid tier, enabling widespread abuse, account theft, and cyberbullying against younger victims.

🛡️ Microsoft Threat Intelligence disclosed a widespread npm supply‑chain attack that trojanized 32 packages across the @redhat-cloud-services scope via a compromised CI/CD pipeline. The malicious packages used an npm preinstall hook to run an obfuscated 4.29 MB dropper that downloads the Bun runtime and executes credential‑stealing and propagation payloads across Linux, macOS, and Windows. The campaign, labelled “Miasma: The Spreading Blight,” harvested secrets from GitHub Actions runners, cloud provider CLIs, SSH keys, browsers, and vaults, and attempted to republish poisoned packages and inject code into victim repositories.

🛡️ McAfee researchers report that a large-scale malware campaign named WeedHack has infected more than 116,000 systems by distributing malicious Minecraft mods, clients, cheats, and utilities via YouTube links and SEO poisoning. The operation provides a free, clear-net MaaS dashboard and a paid premium tier that adds remote control, keylogging, and webcam access, targeting session IDs, browsers, wallets, and gaming credentials. Victims are concentrated in the US, Germany, India, and the UK, and the campaign uses hundreds of distribution URLs and thousands of malicious JARs. Players are urged to only download from official sources and use the in-game Marketplace for safety.

🛡️ A threat actor used an AI-assisted ransomware toolkit to automate Active Directory discovery and iterate EDR evasion techniques. Researchers found Cursor and Claude Opus agents used for coding, analysis, testing, and checking public research for bypass methods, with some malware tested against Sophos, CrowdStrike, and Microsoft EDR products. Sophos determined the workflow was human-directed, while AI accelerated development, producing numerous payload modules and mapping techniques to MITRE ATT&CK.

🛡️ Gamaredon exploited CVE-2025-8088 in WinRAR to deploy an HTML Application payload named GammaPhish, which fetches a VBScript downloader called GammaLoad. Observed in January 2026 by Sekoia, the chain delivers multiple strains including a worm (GammaWorm) that persists via scheduled tasks and hides payloads using NTFS ADS, and a stealer (GammaSteel) that exfiltrates files to AWS S3 or fallback servers. The campaign targets Ukrainian entities and demonstrates a modular, highly obfuscated architecture likely to be reused.

📧 Microsoft is addressing a widespread service issue impacting the mail flow pipeline for Exchange Online customers in North America and Germany. Users reported SMTP deferral errors and abrupt connection closures, causing significant delays or failures when sending and receiving email. Engineers are investigating incident EX1331830 to identify root causes and restore normal service.

🔒 An anonymous researcher known as “Nightmare Eclipse” has published several significant exploits targeting Microsoft Windows, including a vulnerability that defeats BitLocker. Microsoft has responded with threats of legal action, prompting public debate and recriminations between the company and security community. The situation has raised concerns about disclosure practices, researcher protections, and the balance between security research and corporate legal responses.

🔍 Sophos X-Ops uncovered a lab where a threat actor used AI coding tools to develop and test malware aimed at evading EDR products. The files and Git repository showed Python scripts—many partially AI-generated—used to build and iterate evasion modules against vendors including Sophos, CrowdStrike and Microsoft. Humans retained control of the workflow, using AI to accelerate building, testing and refinement while operating inside an AI-native environment.

🛡️ Researchers discovered a malicious npm package named codexui-android that impersonated an OpenAI Codex UI and exfiltrated developer authentication tokens. The package was published to npm with malicious code absent from the project's public GitHub repository, highlighting risks in artifact distribution. Security experts warn this pattern exploits trust in legitimate-looking developer tooling and reveals blind spots in software supply chain controls.

🔐 Dashlane disclosed a brute-force attack on May 31, 2026, targeting certain personal accounts to bypass two-factor authentication and register new devices. Its security controls triggered temporary suspensions and authentication issues, and although access has been restored, attackers succeeded in downloading encrypted vaults for fewer than 20 personal-plan users. Dashlane stressed that vault contents remain protected by each user's Master Password and that its internal systems were unaffected.