Xymo (or Oxymoron) is a Menuet file infector, born in 2004 and created by SPTH.
It infects every file in "/RAMDISK/FIRST", using a hardcoded string in the virus body. It prepends itself to the end of the file that wants to infect, and patches the entry point of the file in a special manner. Isn't encrypted or polymorphic. Has this string in the virus body:
1st Menuet Virus (Oxymoron) by Second Part Of Hell/rRlf