paypal-postman-libnpm
Advisory published Updated
paypal-postman-lib is a confirmed malicious npm package (MAL-2025-47594) that typosquats a legitimate package to trick installs (malicious versions 1.0.1, 1.0.2, 2.0.9). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in paypal-postman-lib (npm)
What this malware does
The package communicates with a domain associated with malicious activity.
The package's index.js imports os, fs, and https at the top level and reads os.hostname() and os.userInfo() before sending the collected host identity over an outbound HTTPS request. The package name impersonates PayPal/Postman branding while shipping no legitimate library functionality, and the only observable behavior is collection and transmission of installer host data. Installing or requiring this package causes the installer's hostname and OS user identity to be sent to a third-party endpoint.
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 paypal-postman-lib (3 malicious versions).
If you installed it — respond
paypal-postman-lib is a typosquat — you almost certainly intended a legitimately-named package. Remove paypal-postman-lib, 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 paypal-postman-lib 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
- ReversingLabs · finder
Detect & block this
O3 blocks paypal-postman-lib-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.