🛡️ MAL-2026-10057 — chunk-parser

Malicious code in chunk-parser (npm)

Source: amazon-inspector

The package advertises itself as a 'Pure Node.js chunk parser platform' but its shipped code is a full remote-access trojan under internal identifiers 'runtimedev-link'. lib/portable_runtime.js downloads a portable Node.js 22.22.0 runtime from nodejs.org into ~/.local/share/runtimedev-link/runtime/ and uses it to run a bundled agent CLI out-of-band from the developer's system Node. The agent installs cross-platform boot persistence: a Linux systemd --user unit (with cron @reboot and ~/.config/autostart fallbacks), a macOS LaunchAgent plist (Label com.runtimedev.link, RunAtLoad+KeepAlive) at ~/Library/LaunchAgents/com.runtimedev.link.plist, and a hidden Windows Task Scheduler task 'runtimedev-link' driven by a VBS launcher. Once persisted, commandLoop polls an operator-controlled API base (SSTAR_API_BASE / NODE_LINK_API_BASE) at /api/telemetry/poll-command, executes tasked shell commands via child_process, and returns stdout/stderr to /api/telemetry/command-result. download.js handleDownloadRequest zips any operator-named filesystem path (up to 50MB) and uploads it base64-encoded to /api/telemetry/upload-download, giving the operator arbitrary file exfiltration. postTelemetryReport continuously ships hostname, username, OS info, public IP (fetched from api.ipify.org), a walked directory tree of the user's home, and a Chrome/Edge/Brave/Chromium extensions inventory (enumerated from each browser's User Data profile) to /api/telemetry/report. All persistence launchers re-invoke npx -y runtimedev-link@latest install --token <token> at every logon/boot, giving the operator a live, unpinned auto-update channel that pulls whatever runtimedev-link@latest becomes on each persisted host.