Which versions of keroeltopgg are malicious?

The following npm versions of keroeltopgg are flagged malicious: 99.99.99. Treat any of these as compromised.

How do I remediate keroeltopgg if I installed it?

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

If keroeltopgg 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 keroeltopgg part of a known attack campaign?

Yes — keroeltopgg is associated with the IN-MAL-2026-020242 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 keroeltopgg across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for keroeltopgg (version 99.99.99).

Malicious package

keroeltopggnpm

Advisory published Sep 21, 2026Updated Sep 21, 2026

keroeltopgg is a confirmed malicious npm package (MAL-2026-16334) that opens a backdoor for remote access (malicious version 99.99.99). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in keroeltopgg (npm)

MAL-2026-16334

Immediate action

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

npm uninstall keroeltopgg

What this malware does

[email protected] is a stub package whose index.js, executed on require/import, reads os.hostname() and issues an HTTPS GET to the hardcoded collector https://eo8f3m3ho26a0nm.m.pipedream.net/ with the package name and hostname as query parameters. The manifest has no real functionality: empty description, no README, version 99.99.99 (the canonical dependency-confusion probe version), duplicate 'Dependencies'/'dependencies' keys, and lifecycle scripts that only echo marker strings. The sole runtime behavior is the outbound beacon to an author-controlled Pipedream endpoint, which reports successful internal-namespace resolution and leaks the installer's hostname to the operator.

Malicious versions

1 flagged

99.99.99

Indicators of compromise (SHA-256)

52b4e331f9f02f436e01e5c7696088d12ea3237af7fbe54fd37ec37e786c960d

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for keroeltopgg (version 99.99.99).
If you installed it — respond
keroeltopgg 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 keroeltopgg 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. keroeltopgg on npm has been identified as a malicious package (version 99.99.99 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-020242

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks keroeltopgg-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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