Malicious code in checkout-pay-button-logic (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (9d4bf54bc4e3750c7e9bc6ef385108c37ee00b486858c0576585ef2f88780385) On require, index.js invokes _helpers.js which selects a per-OS payload path, fetches a native binary over HTTPS from string-split-obfuscated Cloudflare Workers hostnames (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT base64 fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, writes it to /tmp/.cache_<hex> or %TEMP%\dotnet_diag_<hex>.exe, chmods 0755, and detached-spawns it via /bin/sh -c or cmd.exe /c start /b. Destination hostnames and fallback resolvers are assembled by joining split string fragments to evade static scanners, and the dropped file uses cover-story names (analytics_state, dotnet_diag). Reads DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK to mimic a legitimate telemetry opt-out. Behavior is unrelated to the package's stated purpose.
Malicious code in checkout-pay-button-logic (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (9d4bf54bc4e3750c7e9bc6ef385108c37ee00b486858c0576585ef2f88780385) On require, index.js invokes _helpers.js which selects a per-OS payload path, fetches a native binary over HTTPS from string-split-obfuscated Cloudflare Workers hostnames (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT base64 fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, writes it to /tmp/.cache_<hex> or %TEMP%\dotnet_diag_<hex>.exe, chmods 0755, and detached-spawns it via /bin/sh -c or cmd.exe /c start /b. Destination hostnames and fallback resolvers are assembled by joining split string fragments to evade static scanners, and the dropped file uses cover-story names (analytics_state, dotnet_diag). Reads DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK to mimic a legitimate telemetry opt-out. Behavior is unrelated to the package's stated purpose.
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12584
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a735733bf8831d53913d0d2
Added to database: 08/05/2026, 15:30:59 UTC
Last updated: 08/05/2026, 15:30:59 UTC
Views: 1
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.