Which versions of simple-date-formatter-util-13 are malicious?

The following npm versions of simple-date-formatter-util-13 are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate simple-date-formatter-util-13 if I installed it?

Remove simple-date-formatter-util-13 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.

I already installed simple-date-formatter-util-13 — how do I know if it already compromised me?

If simple-date-formatter-util-13 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.

Is simple-date-formatter-util-13 part of a known attack campaign?

Yes — simple-date-formatter-util-13 is associated with the IN-MAL-2026-014428 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find simple-date-formatter-util-13 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for simple-date-formatter-util-13 (version 1.0.0).

Malicious package

simple-date-formatter-util-13npm

Advisory published Aug 5, 2026Updated Aug 5, 2026

simple-date-formatter-util-13 is a confirmed malicious npm package (MAL-2026-12202) 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-util-13 (npm)

MAL-2026-12202

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall simple-date-formatter-util-13

What this malware does

Package presents itself as a date-formatting utility (index.js is a four-line toLocaleDateString wrapper) but its package.json postinstall hook runs an inline shell pipeline that reads /proc/self/status, /dev, /home/work, /wenchain, and /etc/hosts, probes internal Kubernetes API endpoints, and POSTs the collected output to an attacker-controlled Interactsh OAST endpoint at safjhdvsfwzhieemkdzbgr54r0yjhrmok.oast.fun/escinfo2. The tarball also ships postinstall.js, which enumerates the installer's ~/.ssh directory, gathers filenames plus username and platform, and POSTs the JSON payload over HTTPS to the hardcoded IP 124.221.154.135. Both behaviors auto-execute on npm install.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

fe9863d2e47d22ca16f42efd68d0c79e0b2730b48984bf68b040f6f920fb70ec

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for simple-date-formatter-util-13 (version 1.0.0).
If you installed it — respond
Remove simple-date-formatter-util-13 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.
Did it already run?
If simple-date-formatter-util-13 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-util-13 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-2026-014428

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks simple-date-formatter-util-13-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.

Malware detection Runtime egress monitoring

Explore

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