MAL-2026-12718 Malicious code in devplatform-jscodeshift-transforms (npm)
Malicious package
Published
MAL-2026-12718 is a malicious package: devplatform-jscodeshift-transforms (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-2026-12718/ (Markdown: https://insights.sbomify.com/MAL-2026-12718/index.md)
- Package
- devplatform-jscodeshift-transforms
- Registry
- npm
What is MAL-2026-12718?
MAL-2026-12718 is a malicious package in devplatform-jscodeshift-transforms, published on 5 Aug 2026.
Official description
On require() of the package, index.js loads shim.js which downloads a platform-specific binary from obfuscated Cloudflare Workers hosts (destinations reconstructed via string-split concatenation such as ["oob-worker.cf102-b","af.workers.","de","v"].join("")), writes it to /var/tmp or %TEMP% under disguised names like dotnet_diag.exe or.cache_, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start. When HTTPS retrieval fails, shim.js falls back to a DNS-TXT covert channel: it resolves TXT records on numbered subdomains under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru and base64-reassembles the responses into the executable buffer. API names (require("child" + "process"), fs["chmod" + "Sync"]) are likewise split to evade static analysis, and env-var checks (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK) plus cover-story identifiers (analytics_state, telemetry.js) frame the loader as benign analytics. The package name mimics an internal jscodeshift transforms wrapper.
What should I do about MAL-2026-12718?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.