Brainwipe

Brainwipe is anti-personnel program the simplest of the black series programs, all of which are designed to attack the Netrunner instead of his programs. All black programs can be carried by an intruding Netrunner and used to attack other Runners encountered in the Net. Brainwipe tracks the victim down, fries his forebrain with a jolt of current, and reduces him to a drooling vegetable, (1D6 each turn to INT). The screaming Netrunner feels his mind melt away, until his INT is reduced to 0 and he dies. Lost INT cannot be regained.

Source

 * Cyberpunk 2020, pg.142, 139