Motivation

Learning assembly language and CRC hash algorithm

Description

Password locks MBR and prevent Windows XP from further loading

Installation

1. Download Windows XP image (winxp.img further)

2. Copy original winxp.img MBR (0:512 bytes) to 0x3600

3. Compile prologue_mbr.asm and insert bytes instead of original MBR winxp.img

4. Compile password.asm and insert bytes with 0x3400 offset winxp.img

5. Run bochs 2.6.11 with following config

   

Demo