NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
Malicious package

simple-date-formatter-util-14npm

Advisory published Updated

simple-date-formatter-util-14 is a confirmed malicious npm package (MAL-2026-12203) 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-14 (npm)

MAL-2026-12203
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall simple-date-formatter-util-14

What this malware does

package.json declares a postinstall lifecycle script that runs a shell pipeline enumerating /home/work directory contents, probing the internal Kubernetes API server, and reading /proc namespace/mount/capability info, then POSTs the collected output to http://safjhdvsfwzhieemkdzbgr54r0yjhrmok.oast.fun/escinfo3 (an interact.sh OAST collector). The tarball also ships postinstall.js, which enumerates the installer's ~/.ssh directory via os.homedir() and POSTs the file listing plus user/platform info to a hardcoded bare-IP endpoint https://124.221.154.135/post. Neither behavior is related to the package's stated date-formatting purpose, and both fire on npm install.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

043fc72acaebb0b8e96a80ee338611c81567284213ea047911a851d3f00dcc46

Detection & response playbook

Malicious package

  1. Find it

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

  2. If you installed it — respond

    Remove simple-date-formatter-util-14 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-util-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-util-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-2026-014427

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks simple-date-formatter-util-14-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

All malware advisories How O3 detects malware Vulnerability database
simple-date-formatter-util-14 (npm) malicious package — MAL-2026-12203 | O3 Security