muaddib-scannernpm
Advisory published Updated
muaddib-scanner is a confirmed malicious npm package (MAL-2026-4616) that typosquats a legitimate package to trick installs (malicious version 2.11.41). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in muaddib-scanner (npm)
What this malware does
package.json declares "loadash": "^1.0.0" as a runtime dependency. loadash is a well-known typosquat of lodash and is never required or imported anywhere in this package's source — the dependency is unused by the scanner itself. Every installer of this package pulls loadash@^1.0.0 into their node_modules transitively, executing whatever code that namesquat ships. The remaining static signals on this package (curl/ping/POST/child_process/https patterns across src/scanner/, src/ioc/, src/rules/, src/ml/, src/sandbox/) are consistent with the package's stated purpose (a supply-chain security scanner that inspects other packages' lifecycle scripts, fetches package metadata from registry.npmjs.org, and analyzes IOC patterns like curl http://evil.com as data); literal strings like curl http://evil.com and $(whoami) appear as detection rule examples, not as executed commands. The block is on the namespace-abuse vector — a security tool has no legitimate reason to ship an unused typosquat dependency, and installers should not silently acquire it.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
TyposquatFind it
Search your lockfiles and build artifacts for muaddib-scanner (version 2.11.41).
If you installed it — respond
muaddib-scanner is a typosquat — you almost certainly intended a legitimately-named package. Remove muaddib-scanner, 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 muaddib-scanner 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 muaddib-scanner-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.