Although last week’s attack on the Miami-based IT software firm Kaseya appears to have caused what Biden called “minimal damage” to U.S. businesses, it was concerning enough that personnel at key federal agencies worked through the July 4 holiday weekend to assess the damage — work that is ongoing, the president added. Such disruptive cyberattacks that have been locking up the networks relied on by hospitals, schools and industry — with hackers demanding large sums of money to unlock them — are seen as a more pressing threat today than traditional, limited espionage carried out by governments against other governments, political parties and other targets... The White House hopes to build a multifaceted strategy focused on hardening cyberdefenses, diplomatic outreach to American allies and potentially targeted offensive responses, including the disruption of computer infrastructure used by hackers, officials said. “No one thing is going to work alone,” said one senior administration official, who spoke on the condition of anonymity because of the issue’s sensitivity. “We’re pushing everybody on all of these angles, whether it involves building resilience, using diplomacy or disrupting networks, because we believe only together will we significantly impact the threat.”