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Part of a larger attack: @posthog published 56 malicious packages. See the full campaign →
Malicious package

@posthog/netdata-event-processingnpm

Advisory published Updated

@posthog/netdata-event-processing is a confirmed malicious npm package (MAL-2025-191297) that steals credentials and exfiltrates sensitive data (malicious version 0.0.8). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @posthog/netdata-event-processing (npm)

MAL-2025-191297
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @posthog/netdata-event-processing

What this malware does

The package @posthog/netdata-event-processing was found to contain malicious code.

This package was compromised by the Sha1-Hulud: The Second Coming NPM worm. The malicious payload steals tokens and credentials and publishes them to GitHub. The worm will propogate itself to NPM packages the user owns and establish persistence is a GitHub action. The package may also destroy the user's home directory.

Malicious versions

1 flagged
0.0.8

Indicators of compromise (SHA-256)

35d3cfd52b93ade043c3a5450b2a28a9f30718b025829e33707b8f6f030ebd73
3f3fdd5fe90ae01310b329b8e4892a4e79799685cdb45682fd4de592b402710e

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for @posthog/netdata-event-processing (version 0.0.8).

  2. If you installed it — respond

    @posthog/netdata-event-processing 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.

  3. Did it already run?

    If @posthog/netdata-event-processing 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. @posthog/netdata-event-processing on npm has been identified as a malicious package (version 0.0.8 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks @posthog/netdata-event-processing-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
@posthog/netdata-event-processing (npm) malicious package — MAL-2025-191297 | O3 Security