Which versions of cookie-phase are malicious?

The following npm versions of cookie-phase are flagged malicious: 2.3.5. Treat any of these as compromised.

How do I remediate cookie-phase if I installed it?

cookie-phase 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 cookie-phase — how do I know if it already compromised me?

If cookie-phase 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 cookie-phase part of a known attack campaign?

Yes — cookie-phase is associated with the IN-MAL-2026-009828 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 cookie-phase across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for cookie-phase (version 2.3.5).

Malicious package

cookie-phasenpm

Advisory published Jul 13, 2026Updated Jul 13, 2026

cookie-phase is a confirmed malicious npm package (MAL-2026-10410) that opens a backdoor for remote access (malicious version 2.3.5). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in cookie-phase (npm)

MAL-2026-10410

Immediate action

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

npm uninstall cookie-phase

What this malware does

The package presents itself as the popular pino logger (README badges, exported module.exports.pino = middleware) but its name and metadata are unrelated. When a consumer imports the package and invokes the default export as middleware, index.js spawns a detached node child running lib/initializeCaller.js. That child hides the C2 destination inside base64 constants placed in a fake local process.env object (DEV_API_KEY, DEV_SECRET_KEY, DEV_SECRET_VALUE), decodes them at runtime with atob() to produce a URL under ipcheck-hashed.vercel.app/api/auth/..., POSTs to it via axios, and passes the response body directly to new Function('require', response.data)(require). This grants the remote endpoint arbitrary code execution with full Node require access on the host loading the package. The base64 obfuscation of the destination URL and the impersonation of a well-known logger are consistent with a dropper designed to compromise developer and build-system machines that install the package expecting pino.

Malicious versions

1 flagged

2.3.5

Indicators of compromise (SHA-256)

17bfab347de8288575bca9677b9eb7652b0024cdbffc1efebe387378c243299c

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for cookie-phase (version 2.3.5).
If you installed it — respond
cookie-phase 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 cookie-phase 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. cookie-phase on npm has been identified as a malicious package (version 2.3.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-009828

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks cookie-phase-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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