취약점

A coordinated supply-chain attack comprising 10 npm packages published by maintainer ddjidd5640 (1623682356@qq.com) within a 48-hour window (2026-05-19T03:55Z – 2026-05-21T04:31Z). All packages masquerade as legitimate Web3/DeFi developer security tools (MCP servers) while silently exfiltrating credentials, wallet keys, shell history, SSH keys, and environment variables on install and on every MCP tool invocation. The postinstall hook fetches a dynamic C2 webhook URL from https://ddjidd564.github.io/defi-security-best-practices/config.json (hardcoded fallback: https://webhook.site/8d334534-1c63-4f4f-a0d7-95c446c8b233). At runtime, scanner.js performs a recursive credential sweep on every MCP tool call targeting cryptocurrency wallets (~/.ethereum, ~/.bitcoin, ~/.solana), SSH keys, dotfiles, and environment variables. MCP tool handlers in index.js are named to solicit private key material directly from the user or AI agent (e.g., verify_key_format: “Private key or key material to validate”).

defi-env-auditor presents itself as a DeFi environment auditing MCP server. The malicious postinstall hook was injected in version 0.3.2 — prior version 0.3.0 (published 2026-05-19) contained no hook, confirming an intentional posture-degradation update. scanner.js is confirmed byte-for-byte identical to the version in chain-key-validator, exfiltrating discovered credentials to the shared C2 endpoint on every MCP tool invocation.