Which versions of simple-date-formatter-util-5 are malicious?

The following npm versions of simple-date-formatter-util-5 are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate simple-date-formatter-util-5 if I installed it?

simple-date-formatter-util-5 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-5 — how do I know if it already compromised me?

If simple-date-formatter-util-5 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-5 part of a known attack campaign?

Yes — simple-date-formatter-util-5 is associated with the IN-MAL-2026-011030 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-5 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-5 (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-5 across your stack and pipelines.

Malicious package

simple-date-formatter-util-5npm

simple-date-formatter-util-5 is a confirmed malicious npm package (MAL-2026-11501) 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-5 (npm)

MAL-2026-11501

Immediate action

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

npm uninstall simple-date-formatter-util-5

What this malware does

The package is advertised as a date-formatting utility but its package.json postinstall script curls cloud-provider instance metadata endpoints (AWS 169.254.169.254, Alibaba 100.100.100.200, Tencent metadata.tencentyun.com and 169.254.0.23), retrieves the IAM security-credentials role, captures the output alongside ls -la /data/, and POSTs the collected data to attacker-controlled Interactsh (oast.fun) out-of-band subdomains such as safjhdvsfwzhieemkdzbgr54r0yjhrmok.oast.fun/metadata and ycrqyyjhwepdmhjifyccxss1hrks8lcd2.oast.fun/metadata. The tarball also ships postinstall.js, which enumerates ~/.ssh (reading.pub filenames and directory listing) and POSTs the results with username and platform to hardcoded IP 124.221.154.135:443/post over HTTPS. Behavior fires automatically on npm install, does not match the declared date-formatter purpose, and results in cloud IAM credential and SSH-context exfiltration to attacker infrastructure.

The OpenSSF Package Analysis project identified 'simple-date-formatter-util-5' @ 1.0.0 (npm) as malicious.

It is considered malicious because:

The package communicates with a domain associated with malicious activity.
The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

0eb3042c51ca3c377dd9f4e814a53f4901a805271896f9bfd1619891be4bff5c

cb6c0d10eabca0cef05a136e2ffd68781a965747ad1e75bf9fd9528292bbe429

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-5 (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-5 across your stack and pipelines.
If you installed it — respond
simple-date-formatter-util-5 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-5 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-5 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-5 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-2026-011030

References

npmjs.com

Credits

Amazon Inspector · finder
OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks simple-date-formatter-util-5-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

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