Press Association Sport understands the 28-year-old is due to head for Wearside in a bid to tie up a move, although that is likely to happen later this week.
The Black Cats have been on Scocco's trail for some time, but the fact that his current club still have to finish paying former side Newell's Old Boys for his transfer last summer has proved a complication.
Should the Wearsiders manage to push through the transfer, the frontman would be the third Argentinian to head for the Stadium of Light this month with keeper Oscar Ustari and central defender Santiago Vergini already on board.
Manager Gus Poyet has also brought in Spanish full-back Marcos Alonso on loan from Fiorentina and recalled striker Connor Wickham from Sheffield Wednesday 24 hours before his loan deal was due to expire.
- Sports & Recreation