Hackers linked to a prominent ransomware group have been targeting US business executives at “numerous organizations” in a massive campaign since last month, according to a warning issued by Google on Thursday. Google’s researchers said the hackers claim to be part of the notorious “clOp” ransomware gang and have been sending the threatening emails as part of what it described as a “high-volume” attack. It wasn’t immediately clear which other companies have been targeted in the ransomware