GentleKiller

Trust Chains Broken at Scale While ClickFix Becomes a Service This week, attackers stopped trying to kick down the front door and instead walked in through the trust chains that hold digital ecosystems together. North Korea's Sapphire Sleet compromised over 140 Mastra npm packages through a single typosquatted dependency, stealing cryptocurrency wallets and planting persistent backdoors on developer machines. The GlassWorm group trojanized Open VSX extensions with WebAssembly malware that uses the Solana blockchain as an unkillable command channel, while SmartApeSG hijacked the Okendo Reviews widget to serve malicious prompts on thousands of e-commerce sites. Even vendor integrations became a liability: the Klue breach exposed Recorded Future client data through a compromised OAuth token connecting a marketing tool to Salesforce. Deception also became an industrial product. The ErrTraffic framework now operates as full Malware-as-a-Service, using blockchain smart contracts to hide its infrastructure and compromised WordPress sites to serve fake error prompts that trick users into running malicious commands. Attackers weaponized trusted AI platforms too—one campaign abused claude.ai's shared chat feature to deliver MacSync infostealer on macOS, while the shai_hulululud npm package uses prompt injection to blind AI-powered security scanners. On the infrastructure side, the FortiBleed campaign cracked credentials for over 73,000 FortiGate firewalls with a 45-GPU cluster, handing attackers valid keys to government and defense networks worldwide. Defenders should immediately hunt for the easy-day-js dependency in their npm projects, reset credentials on any FortiGate firewall, enable Azure AD Graph Activity Logs to close a years-long reconnaissance visibility gap in Microsoft cloud environments, and audit OAuth tokens on all third-party vendor integrations.

2026-06-197 minESETcritical

ESET researchers analyzed the Gentlemen ransomware-as-a-service (RaaS) operation, highlighting their unique approach of providing an in-house developed EDR killer framework, GentleKiller, directly to affiliates. The framework leverages Bring Your Own Vulnerable Driver (BYOVD) techniques to terminate over 400 security processes and is augmented by third-party tools like HexKiller and HavocKiller, all standardized with a shared defense-evasion layer.