"The sample retains Shai-Hulud hallmarks and adds GitHub API exfiltration with DNS fallback, hook-based persistence, SSH propagation fallback, MCP server injection with embedded prompt injection targeting AI coding assistants, and LLM API Key harvesting," the company said. The packages, published to npm by two npm publisher aliases, official334 and javaorg, are listed below - Also identified are four sleeper packages that do not incorporate any malicious features -