King Trail

King Trail is anti-personnel program hits a target with a glowing object causing it to generate a glowing trail of fluid-like light very similar to the king trail of a snail or slug for 3D6 turns. Anyone noticing this trail will be able to know the netrunner's exact location when one intersects the trail as long as the netrunner is attached to it. The trail will not adhere to any other netrunner. The connection to the tail can be broken with any intrusion program. Treat the King Trail as a STR 4 Data Wall. A successful attack on the King Trail will stop the slime from molting for the target 1D6 turns. Two successful attacks destroys it.

Source

 * Rache Bartmoss Guide to the Net, pg.148, 149