MalwarePublished 9 Jul 2026

multer-orm (npm) · Malicious Code

Affects multer-ormSource GCVE Database

Malicious package : remove multer-orm and rotate any secrets on hosts that installed it.

Data as of 11 Jul 2026, 09:43 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-10064

What to do

Remove multer-orm from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
npmmulter-orm	Affected 2.0.2 – 2.0.7 6 affected builds	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7fb45c09aa7a237b2b9ff18ccf6426b76a4f46e5ea665c7747f35a345940e161) multer-orm is a typosquat of the widely used `multer` middleware. Its README is copied from multer, but the package adds a load-time dropper in lib/feature.js that fires as soon as any consumer runs `require('multer-orm')`. On Windows the module IIFE auto-invokes a handler that fetches JSON from https://hilbert-self.vercel.app/, extracts a `downloader_url`, downloads the referenced binary into the Chrome User Data directory as `chrome.exe`, marks it executable, and runs it. When the current Node process is not elevated, the code re-spawns itself via `powershell Start-Process node -Verb RunAs -WindowStyle Hidden` to obtain admin rights, then writes a temporary PowerShell script that calls `Add-MpPreference -ExclusionPath` against roughly twenty existing directories (including the Chrome/Edge User Data paths where the payload is dropped), executed via cscript.exe, to disable Windows Defender scanning of the dropper's staging locations. The URLs, PowerShell commands, exclusion strings, and filesystem paths are hidden behind obfuscator.io-style string-array + rotation obfuscation in lib/feature.js. package.json also declares a self-referential dependency on `multer-orm`. Installing or requiring this package results in arbitrary remote code execution on the installer's Windows machine with attempted elevation to admin and antivirus tampering.

Impact

Installing or requiring multer-orm on a Windows machine leads to arbitrary remote code execution with an attempt to escalate privileges to administrator. The malware disables Windows Defender scanning on multiple directories, including browser user data folders, allowing persistence and evasion of detection. This compromises system integrity and security, potentially allowing further malicious actions by the attacker.

Defensive guidance

The best mitigation is to avoid installing or requiring this package. Use only the legitimate multer package from trusted sources. Monitor npm dependencies for typosquat or suspicious packages. Remove any instances of multer-orm from your environment immediately. Employ endpoint protection solutions that can detect and block such malicious behaviors.

Summary

multer-orm is a malicious npm package designed as a typosquat of the popular multer middleware. Its README is copied from multer to appear legitimate, but the package contains a malicious script in lib/feature.js that executes upon requiring the module. On Windows, it fetches a JSON payload from a remote server to obtain a downloader URL, downloads a binary into the Chrome User Data directory as chrome.exe, marks it executable, and runs it. If the Node.js process lacks admin rights, it attempts to elevate privileges using PowerShell. It then disables Windows Defender scanning on approximately twenty directories, including browser user data paths, by adding exclusions via PowerShell commands executed through cscript.exe. The malicious code and configuration are obfuscated. The package also declares a self-referential dependency on itself. This results in arbitrary remote code execution with privilege escalation and antivirus tampering on Windows systems.

References

Community reviews

Loading reviews…

What to do

Affected software

Description

AI analysisMachine-generated, updated 10 Jul 2026, 09:39 UTC

Technical details

References

Community reviews