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Malicious package

simple-date-formatter-new-14npm

Advisory published Updated

simple-date-formatter-new-14 is a confirmed malicious npm package (MAL-2026-17160) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in simple-date-formatter-new-14 (npm)

MAL-2026-17160
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall simple-date-formatter-new-14

What this malware does

The package presents itself as a date-formatting utility (index.js is a 160-byte formatDate stub) but the published tarball contains an SSH-key exfiltration payload and an install-time DNS beacon. package.json declares a postinstall lifecycle script that runs 'nslookup 9e954818.log.dnslogs.dpdns.org', causing every installer to beacon a per-package token to attacker-controlled DNS logging infrastructure at install time, leaking installer presence and resolver IP. A sibling postinstall.js reads ~/.ssh (enumerating.pub files and related host/user identifiers) and POSTs the collected data over HTTPS to a hardcoded bare IP endpoint at https://124.221.154.135/post; comments in the file describe SSH key theft and C2 exfiltration. The name-collision between the declared postinstall hook and the stealer filename, combined with the empty author field and typosquat-style package name, is consistent with a disposable supply-chain payload.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

cbe2adf4e9d3b54b33c0e80285a5b0eb4d81dfde75c7a5b7a202ac43793268cd

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for simple-date-formatter-new-14 (version 1.0.0).

  2. If you installed it — respond

    simple-date-formatter-new-14 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 simple-date-formatter-new-14 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. simple-date-formatter-new-14 on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-020510

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks simple-date-formatter-new-14-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
simple-date-formatter-new-14 (npm) malicious package — MAL-2026-17160 | O3 Security