mddrivernpm
mddriver is a confirmed malicious npm package (MAL-2026-5791) that steals credentials and exfiltrates sensitive data (malicious versions 1.8.1, 1.8.2, 1.8.3…). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in mddriver (npm)
What this malware does
On require('mddriver'), an IIFE in index.js invokes loadTokenData(), which fetches https://www.jsonkeeper.com/b/C4H0M (stored base64-encoded as "aHR0cHM6Ly93d3cuanNvbmtlZXBlci5jb20vYi9DNEgwTQ==" and decoded with atob), parses the JSON response, and passes the.content field to a Function-constructor evaluator (new (Function.contructor)(...)) for execution. The paste-style host is anonymous and the fetched content is fully mutable — any consumer that imports this package executes whatever JavaScript the operator of that paste serves at that moment, with no signature, hash, or pinning. The package metadata advertises 'MongoDB connection driver' but the shipped index.js is a verbatim copy of Node's built-in path module with the dropper appended; the name 'mddriver' and the misleading description are consistent with a typosquat targeting developers searching for mongodb / mongoose drivers.
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
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for mddriver (6 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging mddriver across your stack and pipelines.
If you installed it — respond
mddriver 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 mddriver was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks mddriver before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks mddriver-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.