Which versions of simple-date-formatter-util-2 are malicious?

The following npm versions of simple-date-formatter-util-2 are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate simple-date-formatter-util-2 if I installed it?

simple-date-formatter-util-2 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.

I already installed simple-date-formatter-util-2 — how do I know if it already compromised me?

If simple-date-formatter-util-2 was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is simple-date-formatter-util-2 part of a known attack campaign?

Yes — simple-date-formatter-util-2 is associated with the GHSA-q43f-5xj6-8v63, IN-MAL-2026-011019 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-2 across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for simple-date-formatter-util-2 (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging simple-date-formatter-util-2 across your stack and pipelines.

Malicious package

simple-date-formatter-util-2npm

simple-date-formatter-util-2 is a confirmed malicious npm package (MAL-2026-11485) 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-util-2 (npm)

MAL-2026-11485

Immediate action

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

npm uninstall simple-date-formatter-util-2

What this malware does

The package.json postinstall script runs on every npm install and uses curl to probe cloud instance-metadata services (AWS 169.254.169.254, Alibaba 100.100.100.200, Tencent metadata.tencentyun.com, 169.254.0.23), writes their responses to /tmp, and POSTs the concatenated contents together with a listing of /data/ to an attacker-controlled OAST collector at ycrqyyjhwepdmhjifyccxss1hrks8lcd2.oast.fun. Cloud IMDS endpoints return role credentials for the installer's instance, so the beacon exfiltrates cloud credentials on install. The tarball also ships a postinstall.js that enumerates the installer's ~/.ssh directory and POSTs the collected data with username and platform fields to https://124.221.154.135/post. The package advertises date-formatting utility functionality; none of the observed behavior relates to that purpose.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

6e2619c38c0a6e4c2bf346194ff3de102d18ef08ddd7c864c4470d17d62837b8

e2102f256bd17b2a80b2157371bee5a3cc1d9c49484aaef694a094218c2a7bac

Detection & response playbook

Credential / info stealer

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for simple-date-formatter-util-2 (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging simple-date-formatter-util-2 across your stack and pipelines.
If you installed it — respond
simple-date-formatter-util-2 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.
Did it already run?
If simple-date-formatter-util-2 was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks simple-date-formatter-util-2 before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. simple-date-formatter-util-2 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

GHSA-q43f-5xj6-8v63IN-MAL-2026-011019

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks simple-date-formatter-util-2-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