Mnuchin's firm, Liberty Strategic Capital, is investing $200 million, while Neuberger Berman and SoftBank are investing $75 million. : Steven Mnuchin told CNBC on Wednesday that his private equity firm is leading a $275 million investment in cybersecurity firm Cybereason in an effort to strengthen crackdowns on ransomware attacks. "This has been something I've been focusing on for a long period of time and is a major focus of our new business," said the former Treasury secretary in former President Donald Trump's administration. "We really like this company," he added in a "Squawk Box" interview.