Can't believe I hadn't spotted anything about this yet. I logged into OpenLedger just a few days ago. Just logged in via wallet.bitshares.org and everything looks intact. I use the local wallet functionality and not the web wallet, would that be resistant to this type of attack?
Out of caution, what reset should be undertaken? Do I need to reset my brain key to change all account keys if desired?
The local wallet (which is what I use) is more secure and would protect from these situations.