I'm not aware if a country do have their own special wallets that's only used by them which other countries can't be made use of. Op I don't also know how you knew the scammers used an exchange wallet because it's as much possible that this scammers would use a decentralized wallet instead of a centralized wallet to do their shits in other to stay untraceable due to centralized exchange KYCs.

Maybe the Beginners and Help section would be more soluable for this thread.