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Mostrando entradas de 2019

El Robin Hood de los procesos pobres (Vamos de escalada)

Pues sí, has leído bien, hoy nos vamos de escalada, pero ojo! No nos vamos a las montañas, nos vamos al interior, al kernel del sistema operativo Windows 10 en esta ocasión, aunque es aplicable a otras versiones con algunos mínimos cambios. Hoy la cosa va de EoP (Elevation of Privilege), escalada de privilegios en el sistema. Vamos a ver cómo hacer de Robin Hood para "mangarle" el “Access Token” al usuario "NT AUTHORITY\SYSTEM" a través de la estructura _EPROCESS del proceso “System” para dárselo al pobre CMD.EXE. ¿Con qué fin? Pues darle poder absoluto sobre el sistema a un usuario limitado, por ejemplo para que pueda utilizar la calculadora, o el notepad sin limitaciones :) Venga vale, que es broma, que en realidad será para utilizarlo en una shellcode y un driver de dispositivo firmado por alguien :) Antes  de  comenzar  hay  que  dejar  claro  que  vamos  a  necesitar  algunas herramientas para realizar este proce...

A Dremel like workstation II

The time to go from the imagination to the reality has arrived! This thing was 3D printed and here it is: As you can see, it is a working progress design but it is almost finished! I would like to print it by using Blue+Gray fillaments and maybe to change the color of the aluminum base to blue also.

A Dremel like tool workstation

… and finally I did it! I always wanted to had a drill column for my dremel tool but I must to say that what I saw from the genuine dremel doesn't convence to me and you know I'm a maker also so why not. In these days I really need that tool so I decided to design and make my own Dremel workstation. It is based on a rack+pinion system as the main moving mechanism. I also has a tool organizer in top of the column like the genuine one and it has an interchangeable head and more important it has been make it for myself and I must to say I am really happy with the result :) You can follow the progress in my Twitter account @BrainCodec  https://twitter.com/braincodec Here you can see some pictures of this awesome and nice thing!