Law firms holding sensitive data for their clients are the targets of a new round of organized cyberattacks, federal authorities cautioned this week. On Tuesday, the FBI warned that U.S. law firms and public relations firms were being targeted by hackers using “spear phishing” attacks — personalized emails drafted to look like they come from a trusted or reputable source and designed to induce the reader to click an attachment or link that will infect his or her computer with malicious software. … More