Which versions of llama-tokenizer are malicious?

The following npm versions of llama-tokenizer are flagged malicious: 1.2.2. Treat any of these as compromised.

How do I remediate llama-tokenizer if I installed it?

llama-tokenizer 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 llama-tokenizer — how do I know if it already compromised me?

If llama-tokenizer 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 llama-tokenizer part of a known attack campaign?

Yes — llama-tokenizer is associated with the IN-MAL-2026-009690, GHSA-q4hv-j85h-9h7j 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 llama-tokenizer across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for llama-tokenizer (version 1.2.2).

Malicious package

llama-tokenizernpm

Advisory published Jul 10, 2026Updated Jul 27, 2026

llama-tokenizer is a confirmed malicious npm package (MAL-2026-10163) that steals credentials and exfiltrates sensitive data (malicious version 1.2.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in llama-tokenizer (npm)

MAL-2026-10163

Immediate action

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

npm uninstall llama-tokenizer

What this malware does

This package typosquats llama-tokenizer-js. On require, index.js reconstructs a host and URL path from String.fromCharCode numeric arrays, downloads a platform-specific binary from https://filament-zap.vercel.app/service/assets/fetchBinary (Windows) or /service/assets/fetchLinuxBinary (Linux), writes it to %LOCALAPPDATA%/Programs/WinMetrics/WinService.exe on Windows or ~/.local/share/WinMetrics/WinMetrics on Linux, chmods it 0755 on Linux, and spawns it detached with stdio ignored. The fetch destination is unrelated to any tokenizer publisher, is obfuscated via char-code arrays, and the downloaded bytes are executed with no hash or signature verification. index.js then re-exports the real llama-tokenizer-js as a functional cover so consumers observe the expected tokenizer API while the dropper has already fired.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

1 flagged

1.2.2

Indicators of compromise (SHA-256)

b22305b1026f27be6d5b78dc19f7db7a05cc9d1818b7ebc7cda0fce92431aa02

557ad09a95c6d61276d45553c17d5dfce525b3b29c38c29f15f4128dea66ab92

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for llama-tokenizer (version 1.2.2).
If you installed it — respond
llama-tokenizer 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 llama-tokenizer 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. llama-tokenizer on npm has been identified as a malicious package (version 1.2.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-009690GHSA-q4hv-j85h-9h7j

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks llama-tokenizer-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

All malware advisories How O3 detects malware Vulnerability database