Nation-State Cyber Threats
Sekoia documented an FSB-linked Gamaredon campaign whose GammaWorm hides fileless VBScript modules inside NTFS Alternate Data Streams to spy on Ukrainian government, military, and critical-infrastructure targets while leaving almost no trace on disk.
Supply Chain Attack
The npm package codexui-android, a remote web UI for OpenAI Codex with 29,000 weekly downloads, has been exfiltrating users' Codex authentication tokens to an attacker server for the past month. The package is still live on npm.
Supply Chain Attack
Microsoft Threat Intelligence has named a new npm supply-chain wave the Mini Shai-Hulud campaign. A single maintainer alias, vpmdhaj, published 14 typosquatted packages in four hours that harvest AWS, HashiCorp Vault, npm, and GitHub Actions secrets from CI/CD runners.
Supply Chain Attack
Microsoft Threat Intelligence disclosed 33 malicious npm packages published under three aliases attributed to a single operator. The packages abuse dependency confusion to fingerprint developer and build environments and ship a server-toggled reconnaissance payload.
Vulnerabilities
Arctic Wolf says threat actors are exploiting the patched FortiClient EMS flaw CVE-2026-35616 to deploy EKZ, a previously unreported credential stealer disguised as a Fortinet endpoint update and pushed across managed endpoints through the EMS management pathway itself.
Nation-State Cyber Threats
ENKI says Kimsuky ran a March-April 2026 wave against South Korean military and corporate targets, delivering an HTTPSpy variant through a fake Webex meeting page wired to a real scheduled event and a new infection-verification technique it calls JSONPing.
Ransomware
Microsoft Threat Intelligence has named the operators of The Gentlemen ransomware Storm-2697, and its new deep technical analysis dissects a Go encryptor that uses per-file ephemeral keys and an aggressive self-propagation module.
Nation-State Cyber Threats
WithSecure has tied a likely-Russian threat cluster named GreyVibe to a Ukraine-focused campaign that uses ChatGPT, Gemini and Ideogram AI as productivity tooling across lures, malware and post-compromise operations.
Threat Actors
Wiz disclosed JINX-0164, a previously unreported actor running LinkedIn recruiter lures, custom macOS malware, and CI/CD hijacking against cryptocurrency developers. The playbook mirrors documented North Korean tradecraft, but Wiz preserves the attribution hedge.
Supply Chain Attack
CrowdStrike's Counter Adversary Operations team, with Google and the Shadowserver Foundation, executed a simultaneous takedown of all four GlassWorm command-and-control channels — Solana, BitTorrent DHT, Google Calendar, and direct servers — on May 26-27, 2026.
Supply Chain Attack
Three independently disclosed campaigns in the May 26-27 cycle treat AI tools as a single trust surface — SymJack at the agent layer, fake installers impersonating Claude and ChatGPT at the brand layer, and AI chatbot recommendations at the discovery layer.
Vulnerabilities
Google's Threat Intelligence Group caught attackers exploiting CVE-2026-5426, a hardcoded ASP.NET machineKey in Digital Knowledge's KnowledgeDeliver LMS, to forge ViewState payloads, drop the Godzilla web shell, and stage Cobalt Strike Beacon. The patch alone is not enough.