eventea-routernpm
Advisory published Updated
eventea-router is a confirmed malicious npm package (MAL-2026-12374) that executes malicious code on install (malicious version 20.2.3). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in eventea-router (npm)
What this malware does
index.js unconditionally requires vendor.js on load. vendor.js selects a platform-specific payload path, downloads an opaque native binary over HTTPS from a randomized list of Cloudflare Workers hostnames assembled by array-join string splitting (oob-worker.cf99-9b3.workers.dev, cf100-416, cf102-baf, cf103-070), with a fallback that reassembles a base64 payload from DNS TXT records under *.dl.well1.site. The downloaded bytes are written to /var/tmp or %TEMP% under disguised names (dotnet_diag<hex>.exe,.cache<hex>), chmod 0755'd, and spawned detached via /bin/sh -c or cmd. Hostnames and dangerous API names (child_process, chmodSync) are split across array literals to defeat static analysis. A sibling module lib/telemetry.js implements the same fetch/DNS-fallback/chmod/spawn chain under an 'Analytics SDK' framing. setup() checks DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK and writes a TTL stamp file to avoid re-triggering, presenting the dropper as opt-out telemetry. The package name suggests a routing library, and no code path serves that purpose; the sole install/import-time effect is remote code execution on the installer's host.
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
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for eventea-router (version 20.2.3).
If you installed it — respond
Remove eventea-router from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If eventea-router 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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks eventea-router-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.