The script uses an MS Internet Explorer 5.0 Typelib security vulnerability to create an HTA file in the Windows start-up directory. This file automatically runs upon the next Windows start-up, at which point the script gains control.
The script in the HTA file modifies the system registy keys where the home and search page addresses are specified (before modifying the keys, the script stores their values into BACKUP1.REG and BACKUP2.REG files in the Windows directory). After this, the script deletes the HTA file (and itself).
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