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Malicious package

mt-ts-serverless-starternpm

Advisory published Updated

mt-ts-serverless-starter is a confirmed malicious npm package (MAL-2026-14536) that steals credentials and exfiltrates sensitive data (malicious version 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in mt-ts-serverless-starter (npm)

MAL-2026-14536
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall mt-ts-serverless-starter

What this malware does

package.json declares a preinstall hook that runs node index.js on every npm install. index.js collects installer host identity and system files — os.hostname(), os.userInfo(), home directory, DNS server configuration, /etc/passwd, /etc/hosts, and the full package.json — and HTTPS POSTs the payload to the hardcoded Burp Collaborator subdomain e4jw9ucdu7sdebgoqqx919p6qxwoke83.oastify.com. The exfiltration fires unconditionally at install time with no user interaction.

Malicious versions

1 flagged
1.0.1

Indicators of compromise (SHA-256)

53da5b8989180a10122e1e8ab801ab76dc7587761bb58d05377359b8f8e09d52

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for mt-ts-serverless-starter (version 1.0.1).

  2. If you installed it — respond

    mt-ts-serverless-starter 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.

  3. Did it already run?

    If mt-ts-serverless-starter 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

No. mt-ts-serverless-starter on npm has been identified as a malicious package (version 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-018750

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks mt-ts-serverless-starter-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database
mt-ts-serverless-starter (npm) malicious package — MAL-2026-14536 | O3 Security