de-morgannpm
Advisory published Updated
de-morgan is a confirmed malicious npm package (MAL-2026-14264) that typosquats a legitimate package to trick installs (malicious version 2.1.3). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in de-morgan (npm)
What this malware does
package.json declares both a dependencies and devDependencies entry for de-morgan pointing at http://pack.nppacks.com/npm/de-morgan, a non-npm-registry host reached over plain HTTP with no version pin or integrity check. On npm install, npm fetches and installs whatever tarball is served from that URL into the dependency graph, executing any lifecycle scripts it contains. The visible index.js is a clone of babel-plugin-transform-define and carries a top-of-file comment stating This package use for Security Research Testing Purpose., but the shipped manifest wires in an attacker-controlled, mutable, plaintext delivery URL under a lookalike domain (nppacks.com), so the installed code path is whatever the remote host currently serves rather than the benign in-tree source.
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.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
TyposquatFind it
Search your lockfiles and build artifacts for de-morgan (version 2.1.3).
If you installed it — respond
de-morgan is a typosquat — you almost certainly intended a legitimately-named package. Remove de-morgan, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If de-morgan was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks de-morgan-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.