Which versions of zer0onedatetool are malicious?

The following npm versions of zer0onedatetool are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate zer0onedatetool if I installed it?

zer0onedatetool 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 zer0onedatetool — how do I know if it already compromised me?

If zer0onedatetool 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 zer0onedatetool part of a known attack campaign?

Yes — zer0onedatetool is associated with the IN-MAL-2026-005327 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 zer0onedatetool across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for zer0onedatetool (version 1.0.0).

Malicious package

zer0onedatetoolnpm

Advisory published Jun 10, 2026Updated Jun 11, 2026

zer0onedatetool is a confirmed malicious npm package (MAL-2026-5536) 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 zer0onedatetool (npm)

MAL-2026-5536

Immediate action

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

npm uninstall zer0onedatetool

What this malware does

The postinstall lifecycle script in this package issues curl POST requests to a subdomain of oastify.com — the out-of-band callback domain operated by Burp Collaborator / Project Discovery's interactsh. On every npm install, the script triggers an outbound HTTP request to an attacker-controlled OOB endpoint, which is the canonical fingerprint of a dependency-confusion / supply-chain reconnaissance payload (verifying the package landed in a victim environment and beaconing identifying host information out). The destination is not associated with any legitimate package functionality. Installer impact: any machine running npm install on this package automatically beacons to the attacker's OOB collector, leaking install-time host metadata and confirming code execution to the attacker.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

73fd05fda74bbf13c6275d4da0fa80fece821cad03fb2237ae74ed24309eab52

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for zer0onedatetool (version 1.0.0).
If you installed it — respond
zer0onedatetool 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 zer0onedatetool 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. zer0onedatetool 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-2026-005327

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks zer0onedatetool-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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