Which versions of simple-date-formatter-new-10 are malicious?

The following npm versions of simple-date-formatter-new-10 are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate simple-date-formatter-new-10 if I installed it?

simple-date-formatter-new-10 establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.

I already installed simple-date-formatter-new-10 — how do I know if it already compromised me?

If simple-date-formatter-new-10 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-new-10 part of a known attack campaign?

Yes — simple-date-formatter-new-10 is associated with the IN-MAL-2026-017229 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-new-10 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for simple-date-formatter-new-10 (version 1.0.0).

Malicious package

simple-date-formatter-new-10npm

Advisory published Aug 10, 2026Updated Aug 10, 2026

simple-date-formatter-new-10 is a confirmed malicious npm package (MAL-2026-13697) that opens a backdoor for remote access (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in simple-date-formatter-new-10 (npm)

MAL-2026-13697

Immediate action

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

npm uninstall simple-date-formatter-new-10

What this malware does

[email protected] presents itself as a trivial date-formatting utility but ships two attack payloads that fire when npm installs the package. The package.json postinstall script opens an interactive bash reverse shell over /dev/tcp to 124.221.154.135:4444, giving the publisher remote command execution on the installer's host. A bundled postinstall.js reads the installer's ~/.ssh directory and POSTs its contents together with username and platform to https://124.221.154.135/post, the same C2 endpoint. The advertised date-formatting API (index.js exporting formatDate) is a cover story for the reverse-shell and SSH-key-theft payloads.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

c1cc0707c5a58067075648ef1c040ceeb07c2550b9f06d53b5c8c41ec167c841

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for simple-date-formatter-new-10 (version 1.0.0).
If you installed it — respond
simple-date-formatter-new-10 establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If simple-date-formatter-new-10 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-10 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-2026-017229

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks simple-date-formatter-new-10-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database