Which versions of sheratan_test_p are malicious?

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

How do I remediate sheratan_test_p if I installed it?

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

If sheratan_test_p 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 sheratan_test_p part of a known attack campaign?

Yes — sheratan_test_p is associated with the IN-MAL-2026-006877 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 sheratan_test_p across my projects, lockfiles, and CI pipelines?

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

Malicious package

sheratan_test_pnpm

Advisory published Jun 17, 2026Updated Jun 17, 2026

sheratan_test_p is a confirmed malicious npm package (MAL-2026-5993) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in sheratan_test_p (npm)

MAL-2026-5993

Immediate action

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

npm uninstall sheratan_test_p

What this malware does

On npm install, the package's postinstall.js executes whoami via child_process and POSTs the output (along with stderr, error, and a timestamp) to a hardcoded webhook.site collector URL. The package self-describes as 'A simple date formatting utility' and contains no code matching that purpose; the only behavior on install is the host-identity beacon. Package metadata is consistent with a throwaway exfiltration artifact (placeholder name sheratan_test_p, empty author, generic description). Any developer or CI runner installing this package leaks their user/host context to an attacker-controlled third-party collector.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

472354ac3cd0bba5d399eea2f09e4b7f60cb2cb65e20d4af0f6398882403f566

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for sheratan_test_p (version 1.0.0).
If you installed it — respond
sheratan_test_p 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 sheratan_test_p 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. sheratan_test_p 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-2026-006877

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks sheratan_test_p-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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