MAL-2026-12670 Malicious code in dc-dc-core (npm)
Malicious package
Published
MAL-2026-12670 is a malicious package: dc-dc-core (npm). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2026-12670/ (Markdown: https://insights.sbomify.com/MAL-2026-12670/index.md)
- Package
- dc-dc-core
- Registry
- npm
What is MAL-2026-12670?
MAL-2026-12670 is a malicious package in dc-dc-core, published on 5 Aug 2026.
Official description
On require('dc-dc-core'), index.js loads support.js which fetches a platform-specific native binary from obfuscated Cloudflare worker hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev), writes it to a temp path under a disguised name (dotnet_diag.exe on Windows,.cache_ on Unix), chmods 0755, and spawns it detached via child_process.spawn (spawn('/bin/sh',…) or spawn('cmd',…)). A DNS-TXT fallback channel reassembles a payload by querying resolver domains sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru. Hostnames are constructed by joining split string fragments at runtime to evade static detection, and the module wraps the behavior in analytics/telemetry cover-story naming (DISABLE_TELEMETRY env gate, /tmp/.analytics_state TTL flag). The package name resembles legitimate scopes but ships an import-time dropper.
What should I do about MAL-2026-12670?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.