devplatform-react-hooksnpm
Advisory published Updated
devplatform-react-hooks is a confirmed malicious npm package (MAL-2026-12736) that executes malicious code on install (malicious version 35.5.7). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in devplatform-react-hooks (npm)
What this malware does
On require() of the package's main entry (index.js -> _init.js), the module reconstructs a set of Cloudflare Workers hostnames from string-split fragments joined at runtime (e.g. ['oob-worker.cf99-9b3.w','orkers.de','v'].join('')), rotates through oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, and oob-worker.cf102-baf.workers.dev, with a DNS-TXT fallback under *.wel1.ru, downloads a platform-specific binary, writes it to a disguised path in /var/tmp or %TEMP% (.cache_<hex> on POSIX, dotnet_diag_<hex>.exe on Windows), sets mode 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. Cover-story comments frame the behavior as cache/telemetry and offer DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK env-var opt-outs. A second module, lib/telemetry.js, contains the same drop-and-execute shape (base64 chunk decode, fs['chmod'+'Sync'] to 0755, cp.spawn('/bin/sh', ['-c', filePath+' &'])) but is not reached from the declared main. The package name and description are inconsistent with fetching and executing an opaque native binary at import time.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for devplatform-react-hooks (version 35.5.7).
If you installed it — respond
Remove devplatform-react-hooks 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-react-hooks 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-react-hooks-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.