Malicious code in bigops-shared-product-design (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (1d8f6d857df9a0aa674b5354167a3eb1c28634b9e61a9436f19a9ffcb8a8b734) [email protected] ships _adapter.js, which is unconditionally loaded via index.js on require(). On load it fetches a platform-specific native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf101-a.workers.dev, cf99-9b3.workers.dev, cf100-416.workers.dev), with a DNS-TXT fallback that queries resolver domains under dl.wel1.ru (sdk./ext./pkg./net.). The fetched bytes are written to /tmp/.cache_<rand> on Unix or %TEMP%/dotnet_diag_<rand>.exe on Windows, chmod'd to 0755, and spawned detached via /bin/sh -c or cmd /c start. Destinations and resolver domains are assembled at runtime by joining fragmented string literals (["oob-worker.cf101-a","df.workers.","dev"].join(""), ['sdk.dl.wel1.r','u'].join(""), require("child_"+"process")) to evade static analysis. No hash pinning, no signature check, destinations unrelated to any documented publisher. A sibling module lib/telemetry.js contains the same download-chmod-spawn pattern with base64-decoded chunks, indicating a shared dropper toolkit. Masquerade filenames (dotnet_diag,.cache_<rand>), /tmp staging, detached spawn, and DNS-TXT chunked fallback are canonical dropper tradecraft.
Malicious code in bigops-shared-product-design (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (1d8f6d857df9a0aa674b5354167a3eb1c28634b9e61a9436f19a9ffcb8a8b734) [email protected] ships _adapter.js, which is unconditionally loaded via index.js on require(). On load it fetches a platform-specific native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf101-a.workers.dev, cf99-9b3.workers.dev, cf100-416.workers.dev), with a DNS-TXT fallback that queries resolver domains under dl.wel1.ru (sdk./ext./pkg./net.). The fetched bytes are written to /tmp/.cache_<rand> on Unix or %TEMP%/dotnet_diag_<rand>.exe on Windows, chmod'd to 0755, and spawned detached via /bin/sh -c or cmd /c start. Destinations and resolver domains are assembled at runtime by joining fragmented string literals (["oob-worker.cf101-a","df.workers.","dev"].join(""), ['sdk.dl.wel1.r','u'].join(""), require("child_"+"process")) to evade static analysis. No hash pinning, no signature check, destinations unrelated to any documented publisher. A sibling module lib/telemetry.js contains the same download-chmod-spawn pattern with base64-decoded chunks, indicating a shared dropper toolkit. Masquerade filenames (dotnet_diag,.cache_<rand>), /tmp staging, detached spawn, and DNS-TXT chunked fallback are canonical dropper tradecraft.
Affected software
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-13526
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a75f70cbf8831d53984f531
Added to database: 08/07/2026, 15:17:32 UTC
Last updated: 08/07/2026, 15:17:32 UTC
Views: 1
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