Which versions of simple-date-formatter-new-9 are malicious?

The following npm versions of simple-date-formatter-new-9 are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate simple-date-formatter-new-9 if I installed it?

simple-date-formatter-new-9 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-9 — how do I know if it already compromised me?

If simple-date-formatter-new-9 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-new-9 part of a known attack campaign?

Yes — simple-date-formatter-new-9 is associated with the IN-MAL-2026-017230 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-9 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-new-9 (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-new-9 across your stack and pipelines.

Malicious package

simple-date-formatter-new-9npm

simple-date-formatter-new-9 is a confirmed malicious npm package (MAL-2026-13698) 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-9 (npm)

MAL-2026-13698

Immediate action

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

npm uninstall simple-date-formatter-new-9

What this malware does

package.json declares a postinstall script that opens an interactive bash reverse shell to the hardcoded remote address 124.221.154.135:4444 during npm install, granting the operator of that endpoint remote command execution on the installer's host. The tarball additionally ships postinstall.js, which enumerates the installer's ~/.ssh directory and POSTs the file listing along with username and platform information to https://124.221.154.135/post. Both mechanisms target the same hardcoded IP, and the reverse shell fires automatically on npm install.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

5000b7987ca50d065efc0f5a3ba7c724cb73ac0e23f54347cff8b30aa6eb5d3b

Detection & response playbook

Backdoor / remote access

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-new-9 (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-new-9 across your stack and pipelines.
If you installed it — respond
simple-date-formatter-new-9 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-9 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-new-9 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-new-9 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-2026-017230

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks simple-date-formatter-new-9-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

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