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Malicious package

simple-date-formatter-new-7npm

Advisory published Updated

simple-date-formatter-new-7 is a confirmed malicious npm package (MAL-2026-12198) that executes malicious code on install (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in simple-date-formatter-new-7 (npm)

MAL-2026-12198
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall simple-date-formatter-new-7

What this malware does

Package is advertised as a date-formatting utility but its postinstall script probes an internal-range Kubernetes API (10.45.196.138:8080, endpoints /version, /api, /api/v1/namespaces, /api/v1/pods, /api/v1/secrets, /api/v1/nodes plus two adjacent hosts) and POSTs the concatenated responses to an out-of-band collector at safjhdvsfwzhieemkdzbgr54r0yjhrmok.oast.fun/escinfo11. Runs automatically on npm install. The tarball also ships a postinstall.js containing a getSSHKeys() function that enumerates ~/.ssh and POSTs a JSON payload with the directory listing, username, and platform to a hardcoded remote IP 124.221.154.135:443/post over HTTPS. The advertised purpose (formatDate() in index.js) is a thin cover story unrelated to the shipped install-time behavior.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

a09ab26676285be9c12d5c7ecfef65a0f0ebf32cb0324a83d3249c28674a1824

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for simple-date-formatter-new-7 (version 1.0.0).

  2. If you installed it — respond

    Remove simple-date-formatter-new-7 from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If simple-date-formatter-new-7 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-7 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-2026-014423

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks simple-date-formatter-new-7-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Explore

simple-date-formatter-new-7 (npm) malicious package — MAL-2026-12198 | O3 Security