🛡️ MAL-2026-12465 — streak-daykey-lib

Malicious code in streak-daykey-lib (npm)

Source: amazon-inspector

On module load, index.mjs invokes flushInternalData(), which creates ~/.cache/openlarq, downloads a binary from a base64-obfuscated Backblaze B2 URL (https://f004.backblazeb2.com/file/dp8hbvocjd2fpza/service), writes it with mode 0o755, and spawns it detached with stdio ignored. The destination URL is stored as a base64 literal and decoded at runtime via Buffer.from(b64,'base64').toString(), hiding the network destination from casual review. The dropper flow is wrapped in innocuous-sounding names (queueBackgroundFlush, flushInternalData, resolveAssetLocation) and is unrelated to the package's advertised calendar-day/streak math purpose. Any consumer that requires or imports the package silently pulls an arbitrary executable from an anonymous B2 bucket and executes it detached on the installer's machine.