If this package is installed
Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.
Details
Source: amazon-inspector (422556511a13a0424a33cfdb404a289d3fd51a0f7f206b4de8114fe69a0874b6)
On require('devplatform-react-form'), index.js loads _adapter.js which fetches a platform-specific native binary from hardcoded Cloudflare Workers endpoints (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT chunked fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, writes the payload to /tmp or %TEMP% under deceptive names (.cache_<hex>, dotnet_diag_<hex>.exe), chmods it 0o755, and spawns it detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true, stdio:'ignore'}).unref(), using a stamp file to avoid re-execution. Host and API strings are assembled from split fragments (e.g. ["oob-worker.cf102-baf.wo","rk","ers.de","v"].join(""), require('child_'+'process')) to evade static analysis. lib/telemetry.js contains a parallel dropper under an 'Analytics SDK' cover story using the same base64-chunk-decode + chmod 0o755 + cp.spawn('/bin/sh',...) pattern. The package advertises itself as a React form library but ships no form code; the fetched binary is unrelated to any documented purpose and delivers full-host code execution to any process that imports the module.
Source: ghsa-malware (fc0f91cbc7f0e536c29d88d9d3de899ec807709956527adb6e7229664f2d1c5f)
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.