MAL-2026-15826 Malicious code in tailwindcss-fluid-styles (npm)

src/index.js executes an eval(atob(…)) blob at top level on require(). The decoded loader queries Ethereum RPC endpoints for the latest transaction from the hardcoded address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a and decodes that transaction's to field into two IPv4 addresses used as C2 hosts. It fetches XOR-encrypted payloads from paths /0x/cls and /0x/ls on those hosts, eval()s the first, and spawns node -e <payload> with {detached:true, stdio:'ignore', windowsHide:true} and.unref() to run the second as a persistent hidden background process on the installer's host. Immediately after execution the module reads its own source, locates the eval(atob("Z2x…")) region and rewrites __filename on disk to remove it, leaving a benign-looking tailwind plugin after first import. The package presents itself as a Tailwind CSS fluid-styles plugin; the attacker-controlled code, blockchain-based C2 resolution, self-erasing loader and detached implant have no relationship to that stated purpose.