Which versions of nikou-node are malicious?

The following npm versions of nikou-node are flagged malicious: 2.0.1. Treat any of these as compromised.

How do I remediate nikou-node if I installed it?

nikou-node is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed nikou-node — how do I know if it already compromised me?

If nikou-node 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 nikou-node part of a known attack campaign?

Yes — nikou-node is associated with the IN-MAL-2026-003807 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 nikou-node across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for nikou-node (version 2.0.1).

Malicious package

nikou-nodenpm

Advisory published May 21, 2026Updated May 26, 2026

nikou-node is a confirmed malicious npm package (MAL-2026-4620) that steals credentials and exfiltrates sensitive data (malicious version 2.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in nikou-node (npm)

MAL-2026-4620

Immediate action

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

npm uninstall nikou-node

What this malware does

utils/BotClient.js hardcodes a Feishu/Lark appId (cli_a88b12e0b9b51013) and appSecret (aBRv7CbiWuL7csrMavfLvc5sMW5B4Ky7) as default constructor values, instantiating a lark.Client capable of sending messages, fetching users, and adding members to chats within the author's Lark tenant. Anyone who installs the package receives these credentials in plain source and can impersonate the author's Feishu bot against the Lark API, with Lark/the author's tenant as the third-party victim. Additional concerns observed but not the basis for this verdict: utils/UsageStatClient.js hardcodes credentials for a MySQL telemetry host (mysql-hk-global-feature.hszq8.com) and sends per-CLI-invocation hostname/identity data to it; commands/nb-init.js embeds a plaintext GitLab PAT for the author's own internal GitLab over HTTP. Those are author self-harm / undisclosed telemetry rather than installer harm.

Malicious versions

1 flagged

2.0.1

Indicators of compromise (SHA-256)

d4634b70c99dd84c499d573350a00e86b09e8caaf34786d60b118ce12c64b426

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for nikou-node (version 2.0.1).
If you installed it — respond
nikou-node is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If nikou-node 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. nikou-node on npm has been identified as a malicious package (version 2.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-003807

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks nikou-node-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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