In today's podcast, we hear an update on Ukraine's investigation of December's power grid hack. There's news about banking malware and currency trading platform hacks, and hospitals are hit with ransomware. (Good news: Emsisoft has cracked the encryption in two common ransomware strains.) Sympathizers of the Crackas with Attitude don't like last week's arrest. A French teen is arrested in connection with a disruption-as-a-service scheme. And we hear from the University of Maryland's Jonathan Katz on Bitcoin and how it works.