e/KoKo (computer virus)

Information
has gloss	eng: KOKO Virus is a memory resident parasitic virus created on March 1991. It hooks INT 21h and writes itself to the end of COM and EXE files that are executed. On July 29 and February 15 it displays a message and erases the disk sectors, and the next day everything goes back to normal. The message of infection is:
lexicalization	eng: KoKo
instance of	c/DOS file viruses