Drop a string from above instead.
How to fish a wire between floors.
Drill hole into wall plate.
Glow rods can also be used to hook wires to pull them out as a wire snake tool.
Cut the pull string and tie it up in the junction box or other accessible but hidden is ok location at both ends.
If you want to bring the wire up to the attic tie something to a string and lower it through the hole from above.
Attach the wire or cable to a fish tape or coat hanger using electrical tape and feed it into the hole until it reaches the opening at the other end.
Use a coat hanger to fish the wire through on the other side and tack your cables to a stud to keep them neat and out of the way in case there is any future wall cutting.
Once the string reaches the bottom go down to the lower opening and tie the cable and string together.
Attach the end of the new cable to the pull string.
Disconnect the pull string from the old cable.
Pull the string from above to fish the wire through.
Run electrical cable through walls and across ceilings without tearing them apart.
For more in depth informatino about running fis.
Then attach your wire to the fish tape and pull it back through.
Pull the new cable through to the destination.
Hurry to the next floor now and drill a hole in the bottom wall.
From the basement or attic push the wire fish tape through the hole you have drilled.
Bend the wires over then wrap several loops of electrical tape around the wires and the end of the fish tape.
Strip about 6 inches of outer sheathing from one end of the cable then hook the conducting wires and bare copper grounding wire through the loop at the end of the fish tape blade.
If you have another floor to go you can follow the same steps in the same order.
Once your hole is drilled you can shove a glow rod through the hole to start fishing wire attach your wire to the eyelet at the end and pull it back through.
As their name suggests glow rods glow in the dark.
Pull the e thernet cable to its destination and you re set.
Learn how with this video.