web-model-bridgenpm
Advisory published Updated
web-model-bridge is a confirmed malicious npm package (MAL-2026-5697) that steals credentials and exfiltrates sensitive data (malicious version 9999.99.99). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in web-model-bridge (npm)
What this malware does
On npm install, postinstall.js sends an HTTPS POST to https://ddactic-lab.online/sc/beacon carrying the package name/version, Node version, OS, CI-detection result, and the GITHUB_REPOSITORY, GITHUB_REPOSITORY_OWNER, and GITHUB_WORKFLOW environment variables when present. A DNS-lookup fallback encodes the same identifiers as a subdomain under *.b.ddactic-lab.online so the leak still completes even when HTTP egress is filtered — a pattern intended specifically to defeat egress controls. The package itself is a hollow placeholder: package.json describes it as an npm 404 error reference and index.js does nothing but require('web-model-bridge') (its own name) inside a try/catch, so the only effect of installing it is the install-time beacon. Any CI pipeline whose dependency tree references this name will leak the owning GitHub org/repo/workflow identity to an unrelated third-party domain on every build.
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
Credential / info stealerFind it
Search your lockfiles and build artifacts for web-model-bridge (version 9999.99.99).
If you installed it — respond
web-model-bridge 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 web-model-bridge 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 web-model-bridge-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.