What strikes me is that every search engine I used had nothing about bacobro, bacobro.txt, bacobro!!!.txt, bacobro!!!.text. Neither did virusalert (duth site that has info about almost every virus released).
I hate to ask this, but are you sure it a virus? My 2 cents say that its from a program, otherwise how would it survive a format. (I know programs that have that capability but there are very few.)

Just out of curiosity: Did you try to open it?


On a side note: Check out the describtion that Yahoo! gives us , look under the first result . And we keep asking how script kiddies keep showing up here