As the war in the Middle East intensifies, one risk facing American banks is the possibility of cyber attacks by hackers linked to Iran.

There is some historical precedent for this: from late 2011 to mid-2013, nearly 50 financial institutions in the U.S. were attacked repeatedly by a group of hackers aligned with the Iranian government. The attacks disabled bank websites and prevented customers from accessing their accounts.

Marketplace’s Stephanie Hughes spoke with Rafe Pilling, Director of Threat Intelligence with the cybersecurity firm Sophos about what those attacks looked like and whether banks are better equipped to fend off those attacks now.