Devil's Dance (The Virus)

Virus.DOS.Devil, also known as the Devil's Dance, is a very dangerous memory-resident parasitic virus on DOS.

When Devil is loaded into memory, every DOS executable file in current directory are infected by instant, including COMMAND.COM, by adding 1,882 bytes (2 copies of the infection code) to every file, and then it hooks INT 9 and 21h, infects every program that are run.

The virus displays the following message with gray background:

Have you ever danced with the devil under the weak light of the moon? Pray for your disk! The_Joker... Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha