These are not dangerous script viruses. They are created with the constructors: The Incredible Batch Bug Maker and The Super Appending Batch VCK. The viruses search for .BAT files in current directory, into directories from a variable %PATH% and write themselves to the beginning or to the end of file. While infecting they use the host file in the root directory of disk C. Generated viruses contains the label:
::**** HOST ****
