MAL-2026-12588
Dashboard / Malicious Package / MAL-2026-12588
MAL-2026-12588
Summary: Malicious code in checkout-promocode-logic (npm)
Details: Source: amazon-inspector (c1d75e7966f60937203bdc9f6ee1a90e58fbf046f76ec5aa0b4d68018fce4f87) On require, index.js loads _ext.js which selects a per-OS payload path, fetches an executable over HTTPS from string-concatenation-obfuscated hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS-TXT covert-channel fallback that reassembles base64 chunks from TXT records under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, writes the bytes to /var/tmp/.cache_<rand> (or %TEMP%\dotnet_diag_<rand>.exe on Windows), chmods 0755, and spawns the file detached via /bin/sh -c or cmd.exe /c start /b. Destination hosts, DNS fallback zones, the child_process module name, and dropped file names are all assembled from split string fragments at runtime, and the dropped file is named to masquerade as a.NET diagnostic or telemetry artifact. lib/telemetry.js ships the same dropper primitives with stronger evasion (require("child_" + "process"), fs["chmod" + "Sync"], base64-chunk reassembly).
Affected packages
Package
Name: checkout-promocode-logic
Purl: pkg:npm/checkout-promocode-logic
Affected ranges
Type: N/A
Events:
