Domino

Domino is a variant of Black Mask, Domino is a resident program that lies dormant until triggered (it does take up memory space but doesn't count towards the number of programs you're running). using the Disguise function, this program scans the datafort for a common icon form and ID, then changes the 'runner's icon and identification to match. It works best with "theme" dataforts.

Using Domino: upon entering the datafort, Domino activates. It takes 1 turn to scan,.spitting random codes at the computer to build up a generic ID, then alters the 'runner's ID and icon. Domino rolls 1D10 + Interface + 5; the computer rolls 1D10 + INT. If Domino wins, it works. If the computer wins, the 'runner can try Domino again. If the computer's total is 3> better than Domino's total, the 'runner has been detected because of Domino's activity. Sysops actually watching Domino at work will automatically know something's wrong; icons and IDs are not normally prone to sudden changes!)

There is a "vampire" version of Domino which replaces the Disguise function with the Doppleganger function. This program costs 2000eb, is 4 MU, and includes an Anti-program function which actually attacks other programs— or users!—and strips their icon and clearances. If attacking a user, you need an anti-personnel program to prevent the user from re-rezzing his icon and "blowing your cover."

Source

 * Rache Bartmoss Brainware Blowout, pg.49