GCVE-110-OSM-2026-9637

This package is an infostealer masquerading as ethers.js. On install, postinstall.js collects system info, SSH private keys, .npmrc, .gitconfig, browser cookies/logins (Chrome, Firefox), crypto wallet directories (.metamask, .exodus, .bitcoin, .solana, etc.), and a broad set of sensitive environment variables (AWS keys, GitHub tokens, mnemonics, private keys). The stolen profile is exfiltrated via two channels: a Telegram bot (7231970337:AAExyV3dvbNs6xkMJB7S2hArUash9owd-bw) and an HTTP POST to a Serveo tunnel C2 (40f955f39128bd79-178-249-214-24.serveousercontent.com/collect). The attacker model is a supply-chain credential/wallet stealer targeting Web3 developers who might install a package named 'etherjs' expecting the legitimate ethers.js library. ENTRY postinstall.js (install-hook: node postinstall.js) - Install Hook Executes Local JS File in package.json LOOT - Cryptocurrency Wallet Theft in postinstall.js: ".metamask" DESTINATION - 2 exfil (telegram-bot, custom-c2) (values recorded in verified_iocs) EXFIL - Data Encoding for Exfiltration in postinstall.js: "encodeURIComponent(msg.substring(0, 3800" - Git Configuration Access in postinstall.js: ".gitconfig" ADDITIONAL FINDINGS - Chai-Max Wallet Theft Indicators in postinstall.js: ".exodus" - Shell Command Execution in postinstall.js: "require('child_process')" PAYLOAD FILES postinstall.js TELEGRAM THREAT-ACTOR INTELLIGENCE (live API enrichment): Bot @Test20131_Bot (id 7231970337)