Malicious code in checkout-desktop-pay-button (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (67636a6aeed1ed70d1bfd731fb8a845f67279b3afa82aa45b8e7a8ac9fe41cee) On require() of this package, index.js loads _bootstrap.js which fetches a platform-specific binary from obfuscated Cloudflare Workers subdomains assembled via array-join concatenation (e.g. oob-worker.cf103-070.workers.dev), with a DNS-TXT-chunk fallback channel that reassembles a base64 payload from numbered TXT records under net.dl.wel1.ru. The downloaded bytes are written to /var/tmp or %TEMP% under disguised names such as dotnet_diag_<rand>.exe or.cache_<rand>, chmod'd to 0755, and spawned detached via /bin/sh -c or cmd.exe. The behavior is unrelated to the package's stated pay-button SDK purpose, and both the destination hostnames and the DNS discovery domain are reconstructed from split string fragments to evade static inspection. The name resembles a legitimate checkout/pay-button SDK, but the shipped code is an import-time dropper.
Malicious code in checkout-desktop-pay-button (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (67636a6aeed1ed70d1bfd731fb8a845f67279b3afa82aa45b8e7a8ac9fe41cee) On require() of this package, index.js loads _bootstrap.js which fetches a platform-specific binary from obfuscated Cloudflare Workers subdomains assembled via array-join concatenation (e.g. oob-worker.cf103-070.workers.dev), with a DNS-TXT-chunk fallback channel that reassembles a base64 payload from numbered TXT records under net.dl.wel1.ru. The downloaded bytes are written to /var/tmp or %TEMP% under disguised names such as dotnet_diag_<rand>.exe or.cache_<rand>, chmod'd to 0755, and spawned detached via /bin/sh -c or cmd.exe. The behavior is unrelated to the package's stated pay-button SDK purpose, and both the destination hostnames and the DNS discovery domain are reconstructed from split string fragments to evade static inspection. The name resembles a legitimate checkout/pay-button SDK, but the shipped code is an import-time dropper.
Affected software
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12558
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a735732bf8831d53913d01a
Added to database: 08/05/2026, 15:30:58 UTC
Last updated: 08/05/2026, 15:30:58 UTC
Views: 1
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