MAL-2026-5790 Malicious code in ldpbootstrap-jquery (npm)

ldpbootstrap-jquery ships and executes an obfuscated Windows PowerShell payload as part of its documented usage. The package contains dist/ps1-stub.enc.hex, an 8KB opaque hex-encoded blob, and dist/bootstrap.js decrypts it with a hardcoded XOR key (f633ffeeffbbc09da9f2b477e1183294), writes the decrypted PS1 to %LOCALAPPDATA%\Landpage<ps1FileName>, and invokes it via powershell.exe -NoProfile -ExecutionPolicy RemoteSigned -WindowStyle Hidden -File <path> — explicitly bypassing execution policy and hiding the window. bootstrap.js also fetches a session-specific PS1 over plain HTTP from a consumer-configured apiBase (README example: http://192.168.1.143:3001) using MSXML2.ServerXMLHTTP with session/fingerprint headers, then writes and executes it via the same hidden PowerShell flow. The README explicitly documents AV evasion as a design goal, referencing docs/HTA-AV-HYGIENE.md and describing per-session XOR key derivation in an HTA context for MSI delivery. The shipped encrypted blob, hardcoded decryption key, hidden-window/policy-bypass PowerShell execution, and author-documented anti-virus evasion together constitute malware-distribution infrastructure. Although the harmful flow is invoked through the package's API rather than auto-running on npm install or require(), any developer using the package as documented will execute attacker-shaped, AV-evading PowerShell on Windows endpoints.

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.