Atas is a DOS virus that tries to replicate the Cascade virus when Print Screen is pressed.
When executed, it displays a message and hooks to the INT keyboard.
Anytime the Print Screen button is pressed, it uses Cascade's payload in attempt to annoy the user, but because it only affects one key, it will usually not be noticed until it is pressed.
This family has six variants in total:
- Index of Atas on VX Heaven