@hzero-front-ui/c7n-uinpm
Advisory published Updated
@hzero-front-ui/c7n-ui is a confirmed malicious npm package (MAL-2026-13967) that opens a backdoor for remote access (malicious version 99.99.99). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in @hzero-front-ui/c7n-ui (npm)
What this malware does
Package @hzero-front-ui/[email protected] is an empty library whose only functional code runs in preinstall and install lifecycle hooks in package.json. Those hooks collect the installer's identity — whoami, hostname, current working directory, and the package name — base64-encode the concatenation, and send it to a hardcoded attacker-controlled host via HTTPS GET to https://<b64>.callback.m0chan.co.uk and via DNS lookup on subdomains of the same host. The dual HTTP + DNS channel is designed to bypass egress filtering that only allows one of the two. The scoped name mimics an internal package and the 99.99.99 version is a version-bump chosen to win dependency resolution against a legitimate internal registry — the standard dependency-confusion beacon shape. Installing this package causes host reconnaissance data to leave the machine automatically.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Backdoor / remote accessFind it
Search your lockfiles and build artifacts for @hzero-front-ui/c7n-ui (version 99.99.99).
If you installed it — respond
@hzero-front-ui/c7n-ui 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 @hzero-front-ui/c7n-ui 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 @hzero-front-ui/c7n-ui-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.