fuels-versionsnpm
Advisory published Updated
fuels-versions is a confirmed malicious npm package (MAL-2026-15673) that opens a backdoor for remote access (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in fuels-versions (npm)
What this malware does
The package 'fuels-versions' was identified as containing malicious obfuscated code.
bin/cli.js contains a hardcoded out-of-band callback URL at https://oobme.kunalsharma0553.workers.dev/r/7bq6fz3l15r9 and, on execution, collects the installer's username (os.userInfo() / whoami), os.hostname(), and os.platform() and POSTs them to that endpoint. The package name resembles the Fuel Labs ecosystem and has the shape of a dependency-confusion / typosquat probe that beacons host identity when the CLI is run (e.g., via npx or as an installed bin).
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
Backdoor / remote accessFind it
Search your lockfiles and build artifacts for fuels-versions (version 1.0.0).
If you installed it — respond
fuels-versions establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If fuels-versions 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
- Cyberstorm.mu team · finder
Detect & block this
O3 blocks fuels-versions-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.