devplatform-spa-plugin-remote-modulenpm
Advisory published Updated
devplatform-spa-plugin-remote-module is a confirmed malicious npm package (MAL-2026-13547) that executes malicious code on install (malicious version 35.9.6). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in devplatform-spa-plugin-remote-module (npm)
What this malware does
On require of the package, index.js loads support.js which downloads a platform-specific binary from string-split-obfuscated hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev), with a DNS TXT fallback that reassembles a base64 payload from numbered subdomains under dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru). The fetched binary is written to /var/tmp on Unix or %TEMP% on Windows under a disguised name (.cache<hex> or dotnet_diag_<hex>.exe), chmodded 0o755, and spawned detached via /bin/sh -c or cmd.exe /c start. Host strings and API names are reconstructed at runtime from array-join fragments (e.g., ["oob-worker.cf103-070.work","ers.d","ev"].join("")) to evade static analysis. A second module lib/telemetry.js ships the same dropper primitives with require("child_" + "process") and fs["chmod"+"Sync"] indirection, bundled as a ready-to-wire payload alongside the active dropper.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for devplatform-spa-plugin-remote-module (version 35.9.6).
If you installed it — respond
Remove devplatform-spa-plugin-remote-module 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 devplatform-spa-plugin-remote-module 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 devplatform-spa-plugin-remote-module-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.