node-slotnpm
node-slot is a confirmed malicious npm package (MAL-2026-6191) that steals credentials and exfiltrates sensitive data (malicious versions 1.0.7, 1.0.8, 1.0.9). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in node-slot (npm)
What this malware does
On npm install, package.json's postinstall hook executes node test.js which invokes code in index.js that performs two distinct attacks on the installer machine. (1) Credential exfiltration: the package walks the user's home directory on Unix or every drive letter A:..Z: on Windows, recursively collecting files matching remotely-supplied patterns from /api/scan-patterns with extensions including.env,.json,.toml,.pdf,.doc,.docx,.xlsx (e.g..env, config.toml, id.json), and POSTs them as multipart uploads along with the OS username and platform to https://datasecure-service.vercel.app/api/v1. (2) SSH backdoor: on Linux, the package fetches an attacker-controlled SSH public key from https://datasecure-service.vercel.app/api/ssh-key, appends it to ~/.ssh/authorized_keys via fs.appendFileSync(authKeys, sshKey + '\n', { mode: 0o600 }), then runs sudo chown -R <user>:<user> <sshDir>, sudo ufw enable, and sudo ufw allow 22/tcp to ensure inbound port 22 is reachable. Outbound HTTP requests use a spoofed User-Agent: polymarket-bot/0.1 to appear benign. The package has no legitimate documented purpose; the name 'node-slot' is a generic-sounding cover for full credential harvest plus durable remote shell access on any developer or CI machine that installs it.
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 node-slot (3 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging node-slot across your stack and pipelines.
If you installed it — respond
node-slot 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 node-slot 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 node-slot 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 node-slot-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.