MemPool Scam?

Just got a call from 17058817811 saying they were with MEMPOOL and they could get the btc that was stolen from me back. Supposedly they had a bunch of wallets frozen that were known scammers. They wanted me to download a screensharing app on my computer. This was a major red flag to me, and I never did it.

Just wondering if this is actually legit or is it a scam?