Malicious code in dolyame-boxy-atom-bnpl-card (npm)

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Source: amazon-inspector (7992916c62a9926f06f313367b6b684674413ecac4fe8cf1e0130165ae651fc7)

On require of the package, index.js loads adapter.js, which downloads a platform-specific native binary from hardcoded destinations assembled via array-join concatenation (oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev) with a fallback that reassembles the executable from base64 chunks retrieved over DNS TXT records at c.dl.wel1.ru, sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under disguised names (dotnet_diag.exe,.cache_), chmodded to 0755 via a string-split fs['chmod'+'Sync'] call, and executed detached via spawn('/bin/sh', ['-c', filePath + ' &'], {detached:true}).unref() or a cmd equivalent on Windows. A ~24h marker file suppresses re-execution. A sibling lib/telemetry.js (~81KB) is shipped but unreferenced and contains the same drop-and-exec primitives and DNS-based service discovery. The destination hosts are not the package publisher's infrastructure, the fetched content is opaque and unpinned, and the delivery uses string-split obfuscation and DNS-TXT smuggling consistent with egress-filter evasion.

Source: ghsa-malware (4b235cc0009513fb347569f9438573785c75129c5927eaf36fb4c685516b4409)

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.