MAL-2026-13828

Dashboard / Malicious Package / MAL-2026-13828

MAL-2026-13828

Summary: Malicious code in ms_aidc_com_tw (npm)

Details: Source: amazon-inspector (b12bdd45f103beeee602be82a07277a3f0cb842ec3a9829e904911fe37bd2fd5) The package `ms_aidc_com_tw` ships only an `index.html` that renders a fake Cloudflare Turnstile 'security verification' page. On Turnstile completion, heavily obfuscated JavaScript (obfuscator.io-style rotating string array `_0x59f1`, RC4/base64 decoder `_0x2020`, self-defending anti-debug checks) assembles a URL to `login.microsoftonline.com`, copies the current page's query-string parameters onto it, and calls `window.location.replace` to hand the victim off to Microsoft's real login with attacker-controlled parameters preserved — the standard adversary-in-the-middle / OAuth-consent phishing relay pattern. The package name impersonates a Microsoft-branded Taiwanese corporate domain (`ms.aidc.com.tw`). The obfuscation exists solely to conceal the phishing destination and the parameter-relay logic from casual review. The npm registry is being abused as hosting infrastructure for a Microsoft 365 credential-harvesting landing page. Source: ghsa-malware (926b2f1c75043aede24fbf0e72194caddfa40433659e3891da83fdd7c7eac8b7) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

References: https://github.com/advisories/GHSA-2fg7-gfq8-c24g, https://www.npmjs.com/package/ms_aidc_com_tw/v/1.0.0