Hi everyone!
I’ve just fixed a computer infected with usbAl.vbs, so i decided to post you my solution in a few steps.

  1. Enable hidden files and folders and disable hide system files, from folder options.
  2. Stop the script service from Task manager, usually it will be something like “wscript.exe” process (The virus is run using the Windows-based script host).

If you do not want to save any data just format your usb drive and proceed to step 5, otherwise continue with step 3

  1. Open your usb drive and remove all shortcuts and the usbAl.vbs
  2. Open command prompt and write the following (I’ll use G: as an example drive letter, you replace the letter with the infected drive’s letter)

cd G:
G:
attrib -s -h /S /D

!Wait until the command finishes

  1. Go to C:\Users..YOUR_USER_ACCOUT…\AppData\Local\Temp and delete the file usbAl.vbs
  2. Copy %appdata%\Microsoft\Windows\Start Menu\Programs\Startup and paste it in windows explorer and press enter. Delete usbAl.vbs from there

Not the simplest guide, but if you know a bit of windows you’ll be alright.
This was on a windows 7 x86 machine, so if you have XP or something more antique just adapt the directories so they will suite your OS

Best regards,
Momchil Marinov