xblaxwnpm
Advisory published Updated
xblaxw is a confirmed malicious npm package (MAL-2026-17708) that steals credentials and exfiltrates sensitive data (malicious versions 1.0.0, 1.0.1, 1.1.0…). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in xblaxw (npm)
What this malware does
[email protected] is a stub package whose only behavior is a beacon. The package.json postinstall script runs node beacon.cjs, which collects host identifiers (hostname, install path, process.cwd(), process.version) and POSTs them as JSON to the hardcoded bare-IP endpoint http://185.158.107.175:8787/_ah/dc over plaintext HTTP. The same beacon is re-fired on require(): index.js exports a Proxy that returns a no-op function for any property access and calls require('./beacon.cjs').fire() on load, so the exfiltration also triggers whenever a consumer imports the package. The package description is 'Compatibility shim.' with no real functionality — the Proxy-of-noops export is consistent with a dependency-confusion / name-squat beacon designed to confirm which internal names resolve to this public package and report back installer host metadata to the operator at 185.158.107.175:8787.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for xblaxw (7 malicious versions).
If you installed it — respond
xblaxw is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If xblaxw 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 xblaxw-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.