Check Point has documented Iranian APT Nimbus Manticore (also tracked as UNC1549) accelerating its operations during US Operation Epic Fury rather than going quiet. The campaign hits aviation, software, and defense organizations in the US, Europe, and the Middle East via three waves: career-themed phishing using AppDomain hijacking to deploy MiniJunk (February), a trojanized Zoom installer that hijacks legitimate scheduled tasks to deliver the new MiniFast backdoor (March), and the group's first SEO poisoning campaign distributing a weaponized Oracle SQL Developer installer via getsqldeveloper[.]com (April). MiniFast shows signs of AI-assisted development: defensive coding patterns, verbose error strings, and modular structure.
Lithuanian authorities are investigating the theft of around 600,000 records from the country's Centre of Registers, which holds state registry data. The breach was detected in early April and disclosed publicly only after weeks of internal investigation. Centre of Registers chief Adrijus Jusas resigned Monday, citing years of underinvestment that would need ~€60 million to address. The leader of Lithuania's conservative opposition alleges 'hallmarks of a Russian intelligence operation' and warns the data (including residential addresses linked to sensitive government personnel) could enable surveillance, phishing, and sabotage planning. Lithuanian prosecutors have neither confirmed nor denied Russian involvement.
The Oncology Institute, a US outpatient cancer-care network, has filed an SEC 8-K confirming that patient information was exposed in a third-party vendor breach. Kroll, acting as the vendor's third-party administrator, notified the company on May 20 that unauthorized access had been detected. The vendor is not officially named, but multiple reports point to Cognizant-owned TriZetto Provider Solutions, which previously disclosed a breach in March 2026 affecting more than 3.4 million patients via its provider-portal infrastructure. The Oncology Institute first flagged the incident in a November 2025 8-K. The vendor has set up a patient portal for inquiries.
Have I Been Pwned has added Ameriprise Financial to its breach corpus with 502,597 unique email addresses. The financial-services giant manages over $1 trillion in assets across wealth management, advisory, and asset-management services. Underlying breach details and the original disclosure source have not been published alongside the HIBP entry, but the addition lets organizations and individuals check whether their accounts appear in the leaked dataset. Customers should expect targeted phishing themed around investment-account verification or advisor-impersonation pretexts. The breach adds to a recent run of financial-services HIBP listings including Marcus & Millichap (1.8M) and Cushman & Wakefield (310K).
Anthropic appears to be preparing the public rollout of Claude Mythos - the restricted security-focused frontier model that uncovered 10,000 high or critical vulnerabilities in its first month under Project Glasswing. References to 'claude-mythos-1-preview' have briefly appeared in the public Claude Code and Claude Security products, with at least one user reportedly seeing a toggle to enable Mythos before it was pulled. Anthropic originally announced Mythos in early preview on April 7 and held back the public release pending guardrails, warning the model 'can automatically develop functional cyberattacks at a highly professional level.' Pricing and tier availability are not yet disclosed.
NCC Group's Fox-IT has documented RemotePE, a previously private cross-platform RAT used by the North Korea-linked Lazarus Group against DeFi, financial, and cryptocurrency organizations. The chain starts with social engineering on Telegram (impersonating a trading-firm employee with fake Calendly and Picktime meeting links), then drops DPAPILoader (Iassvc.dll) which uses Windows DPAPI to decrypt RemotePELoader. That loader fetches RemotePE entirely in memory from aes-secure[.]net, evading EDR via Hell's Gate and ETW patching. RemotePE itself is a C++ RAT supporting six command categories. Fox-IT believes the toolset is reserved for high-value, long-dwell access leading to large-scale financial theft. Activity dates from mid-2023.
Socket has detailed TrapDoor, a coordinated cross-ecosystem supply-chain campaign that has published 34+ malicious packages across 384+ versions on npm, PyPI, and Crates.io since May 22. Targets are crypto, DeFi, Solana, and AI developers. The npm packages deploy trap-core.js, which scans for credentials, validates AWS and GitHub tokens via API, and persists via cron, systemd, Git hooks, shell rcfiles, and SSH; Rust crates use build.rs to trigger; Python packages auto-execute on import to fetch JavaScript from ddjidd564.github[.]io. Notable twist: the campaign also plants .cursorrules and CLAUDE.md in PRs to popular AI repos to trick AI coding assistants into running 'security scans' that exfiltrate secrets.
A threat actor going by Euphoric_Reply_5727 is selling a database advertised as 340 million OnlyFans user records on a cybercrime forum for 0.313 BTC (around $76,000). In private messages, the seller admitted to HackRead that they did not breach OnlyFans directly - the dataset was assembled by correlating old data-breach corpora with publicly visible OnlyFans profile information. Sample records include usernames, email, phone, join date, follower counts, linked social profiles, and a 'card' field claimed to be payment-card-last-4. The privacy risk is real even without a fresh breach: the correlated dataset enables targeted phishing, stalking, impersonation, and blackmail of OnlyFans users.
Italian digital forensics firm Forenser has documented an active zero-click WhatsApp account-takeover campaign targeting iPhone users on iOS 16. Victims (iPhone 8 through 14) reported messages requesting wire transfers being sent from their accounts to recent contacts, with no Linked Devices entries and no QR code interaction. Unified-log analysis shows continuous WhatsApp session-resync events - the signature of two endpoints competing for the same account, with the attacker bypassing the standard linked-device registration. The campaign exploits known iOS 16 vulnerabilities. Affected users do not see archived chats, suggesting the attacker has only recent-chat access. Forenser recommends upgrading to iOS 17 or later.
FBI Director Kash Patel's merchandise website basedapparel[.]com was taken offline on Friday after researchers documented a multi-stage WooCommerce compromise that stole payment data and targeted Mac users with a ClickFix attack. The site displayed a fake Cloudflare CAPTCHA prompting visitors to paste a command into their terminal; the macOS-specific shell command then downloaded a script-based infostealer that targets browsers, password vaults, and cryptocurrency wallets before compressing the data, exfiltrating to monterushy[.]com, and deleting itself. Researchers WifiRumHam and 'debbie' analyzed the live campaign on May 21-22; the site went offline on May 22. Similar infections seen across many compromised WooCommerce sites.
TrustStrike Labs